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JP2002281579

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2002281579
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker system and / or a peripheral structure of a speaker which enables high fidelity
reproduction including small bass while being small and light and simple. Further, the application
of the present invention extends to mini components, televisions, telephones, radio cassettes,
personal computer built-in speakers, 5.1 channel speakers and the like. Furthermore, as an
application example, it extends to a speaker that is used by being built in a pillow of a bedding
pillow and an easy chair. Another application relates to a rear sound shield which is placed by
the speaker to enhance the sound effect.
[0002]
2. Description of the Related Art An audio device generally referred to as a speaker converts an
electrical sound signal output from an amplifier or the like into audio vibration by
electromagnetic stress or electrostatic stress, and transmits the audio vibration to a diaphragm
made of cone paper or the like. Sound is transmitted by appropriately vibrating the air that
mediates between the diaphragm and the tympanic membrane of the listener. There are various
types of speakers, from large-scale professional use that generates loud sounds for musicians to
use in outdoor concerts, to home-use stereos, mini components, radio cassettes and headphones.
In addition, as an extension of home stereos, 5.1 channel speakers and the like have been
developed and widely used.
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[0003]
FIG. 11 is a horizontal sectional view of a conventional household stereo speaker. If the speaker
units 21 and 22 are used alone as bare components, the main purpose is resonance of the low
frequency range which is considered to be difficult to reproduce, and the speaker boxes 23 and
24 each having a resonance box of a volume obtained by a predetermined calculation In the
conventional speaker provided, the baffle plates 25 and 26, ie, the front plate, have mounting
holes corresponding to the dimensions of the speaker units 21 and 22, and the holes are made of
the cone paper 27 and 28 of the speaker units 21 and 22 The speaker units 21 and 22 are
airtightly fitted in the holes so as to be closed by a plate, and the air on the front and back of the
baffle plates 25 and 26 is prevented from coming and going, and the screw holes (not shown) of
the frames of the speaker units 21 and 22 The speaker units 21 and 22 are firmly fixed to the
baffle plates 25 and 26 by fastening a wood screw or the like (not shown) from the front to the).
[0004]
The main requirement of the baffle plates 25 and 26 is to isolate and prevent sound waves
generated in opposite phases before and after the cone paper 27 and 28, respectively. This is
because mixing the sound waves 5, ie, the sound waves 5, 5 'or the sound waves 6, 6' and the
sound waves 6 'generated in opposite phases adds up to zero and disappears, ie, the sounds
generated by the speaker units 21, 22 are heard It will disappear and disappear before reaching
the ears 29, 30 of the person. Particularly in the low frequency range, the wavelength of the
sound wave is long, and even if there is a distance until two sound waves generated in the
opposite phase reach the ears 29, 30 of the listener, the occurrence of phase shift is small and
the antiphase is small. In theory, the baffle plates 25 and 26 are plates of infinite size so that air
on the front and back sides is completely shut off and interference-free is maintained. In addition,
the baffle plates 25 and 26 themselves are heavy and robust materials that do not vibrate, and
the plates need to be firmly fixed.
[0005]
The sound wave generated in the opposite phase means the dense part of the air in front of the
cone paper 27, 28 when the cone paper 27, 28 advances by the electromagnetic driving force of
the voice coil (not shown) (referred to as positive for convenience of explanation). Of the air
behind the cones 27 and 28 (referred to as negative for convenience of explanation), and
conversely, when the cones 27 and 28 recede, the air upstream of the cones 27 and 28 (Positive)
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and dense air (positive) behind the cones 27 and 28. It is important to isolate them so that they
do not mix positive and negative, especially in order not to attenuate the sound in the low
frequency range. It becomes. In this case, "the effect of isolating and shielding the antiphase
sound waves 5 'and 6' generated behind the cone paper 27 and 28" is strongly effective, which is
referred to as the first operation principle.
[0006]
In addition, when cone paper 27 and 28 advances, the negative which occurred to the back is
reversely reversed by the cylindrical part (not shown) inside speaker box 23 and 24, and the
predetermined hole of baffle plate 25 and 26 (figure There is also a type which positively
radiates from the not shown) and biases the cone paper 27, 28 to push it in front, and its
operation principle is the same as a passive radiator described later along FIG. In other words,
the sound wave may be canceled by subtracting the interference wave, or may be added and
added in reverse, so in the case of a speaker that desires high fidelity reproduction at a
predetermined level, the frequency of the interference wave and A chassis design that takes
phase into consideration is required.
[0007]
In addition, it is general that the speaker boxes 23 and 24 resonate only the air contained
therein, and the casing members of the resonance box including the baffle plates 25 and 26 do
not vibrate and resonate. Therefore, the speaker boxes 23 and 24 are heavy and robust, and a
cotton-like sound absorbing material 31 is attached to the inner wall thereof, and the sound
absorbing material 31 absorbs the sound waves 5 'and 6' and reflects on the inner wall of the
resonance box. The generation of harmful interference waves due to sound etc. is prevented.
[0008]
However, there are still some harmful interference waves that can not be absorbed by the sound
absorbing material 31, and there is also a harm that the free vibration of cone paper is restrained
by the damper effect by the closed air of the closed box. It has not been able to achieve high
fidelity to perfection theoretically as it continues to be regarded as a standard position as the
unit's peripheral structure. Also, if the housing member etc. vibrates unnecessarily, in addition to
the generation of annoying muddy noise, if an LP record player is installed nearby and the
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playback sound of that is used as a source, howling occurs As it causes the problem, the desired
clear sound was obtained by eliminating unnecessary vibration as much as possible. The same
applies to the frames 15 and 16 supporting the cone sheets 27 and 28 in a vibrating manner,
and the frames 15 and 16 are firmly fixed to the baffle plates 25 and 26 so that they do not
vibrate.
[0009]
The well-known fact that it is said that "The casing of the audio equipment including the speaker
is large, heavy and robust and does not vibrate as good as the speaker and so on produces the
good sound." It is based on the desired purpose, (2) the purpose of avoiding the harm of
cancellation by the interference wave of the antiphase, that is, the harm of sound disappearing,
and (3) the reason of avoiding the harm of inaudible turbidity noise. And in the speaker which
equipped the resonance box which consists of an airtight box etc. by the above-mentioned
purpose and reason, the restriction by air pressure is added to back and forth movement of cone
paper which is originally vibratable, and the fault of becoming a clogged feeling sound there
were.
[0010]
Also, as a listening method, first, direct sounds from cone paper 27 and 28, that is, sound waves
5 and 6 of the left L and right R channels, are obtained so as to obtain a natural sound space
formed by diffusing sound from the speakers into space. In addition to the above, there is a usual
method for the listener to hear the reflection noises 33, 34, etc. with the walls 32, the floor and
the ceiling in the listening room. In this case, it is well known that even if the same speaker
system is sounded, the timbre may change depending on the position and posture of the listener
as soon as the listening room is created.
[0011]
Instead of using the orthodox speaker system consisting of the speaker boxes 23 and 24 as in
the first listening method described above, the listener can listen to the diaphragm of a small
speaker (not shown) incorporated therein by headphones (not shown) There is also a second
listening method in which the distance to the tympanic membrane (not shown) is shortened and
only direct sound is transmitted. In this case, since there is no reflected reverberation 33, 34, it
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does not act as a pleasant sound, but it does not act as a harmful interference wave to the
original sound, and always a stable high fidelity original sound reproduction It is also well known
and natural that if the same headphone is worn on the listener's ear (not shown) and sounded,
there will be no change in timbre in the construction of the listening room, the position and
posture of the listener. Because there is nothing other than the temperature, pressure and
humidity of the ear, which affect the direct sound, they do not make much difference in timbre in
the normal atmosphere.
[0012]
And, even with the second listening method, if the structural member etc. of the headphone
vibrates unnecessarily, as with the harm of the illegal vibration of the speaker boxes 23 and 24,
an unpleasant hearing noise will be generated. The required vibration was eliminated as much as
possible to obtain a high fidelity clear playback sound. Therefore, with an adhesive or the like,
the frame or the like (not shown) of the small speaker is substantially integral with the structure
or the like of the headphone so that the structural member or the like (not shown) of the
headphone is not vibrated unnecessarily. It was firmly joined.
[0013]
Also, under the trade name of body sonic, etc., vibrations of an extremely low frequency outside
the audible range are directly transmitted to the human body via a structure (not shown) such as
an easy chair without air. In some cases, there are special speakers (also classified as chairs
outside the scope of speakers) that are highly effective for relaxing like light massages. This is a
special example in which the vibration is transmitted to a part of the structural member of the
easy chair and the cushion portion, and is a conventional example for showing the application
range of the speaker.
[0014]
There is also a special speaker (not shown) which positively vibrates the structural member itself
contrary to the design of a rigid casing in an orthodox speaker. It is to attach the vibration
generating part itself directly to the design panel or wallboard without the frame etc. and vibrate
the design panel or wallboard instead of having ordinary cone paper as the vibration part of the
special speaker unit. Therefore, it was a speaker with strong taste that made it speak from the
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design panel or wall board itself. This is also a special example in which the vibration is
transmitted to the structural member, and is also a conventional example for showing a method
of attaching the speaker unit to the structural member.
[0015]
Regardless of the type of the speaker, the connection between the speaker unit and the mounting
portion to which it is attached is secured with a wood screw or an adhesive to avoid the noise
due to the above-mentioned improper vibration. As described above, most conventional speakers
have a resonance box in order to output reproduced sound efficiently, and cone paper is used to
prevent offset attenuation of sound waves generated in antiphase before and behind cone paper.
The space before and after the room was isolated, and the sound output was enhanced by
resonance to make it efficient.
[0016]
However, the Passive Radiator shown in FIG. 12, that is, a “passive radiation type free
diaphragm without a driving voice coil 92 etc.” (hereinafter referred to as “passive radiator”)
82, is a speaker unit 91 with the same baffle plate. Some were arranged side by side with the
corn paper 27 of This is because the resonance box 90 and the speaker unit 91 operate in the
same manner as the closed resonance box, that is, the driving force of the voice coil 92 causes
the cone paper 27 to move back and forth, and the positive sound wave 5 backward and the
negative sound wave 5 The generated acoustic wave 5 'is positively and negatively inverted by
the interference of the partition plate 93 and pushes the passive radiator 82 forward, so that a
positive acoustic wave 50 is generated and the acoustic waves 5 and 50 of the specific frequency
are generated. It had an enhancing effect. In this case, “the action of emitting a resonated
sound” is strongly effective, and this is referred to as a second operation principle. However,
while the sound wave of a specific frequency is enhanced, unnaturalness can not be denied.
[0017]
SUMMARY OF THE INVENTION However, the most orthodox among the speakers, completely left
L channel and right R channel voices are made up of two or more heavy and robust housings
respectively independent of each other. It is easy to give listeners even high-fidelity to the
original sound, with a sense of three-dimensional sound image localization, and full-blown
natural bassy sounds, except for the type that outputs from a large-sized speaker on a stationary
basis. There was a need to devise a way to do that.
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[0018]
In addition, with regard to headphones, which are known as the most convenient and reliable
means to obtain powerful deep bass with the sense of three-dimensional sound image localization
unique to stereo, and people who dislike this because it is troublesome to wear and feel the cord.
There were also many.
Therefore, headphones may be used for business use, but headphones are not suitable for
relaxing purposes. In addition, headphones cover the speaker unit worn to face the ear at the ear
as one piece with the ear with a cushioned rigid cover etc., and isolate and shield the sound of
the opposite channel regarding left and right, and also isolate the ear from external sound Most
of the structures are shielded, and there was also a drawback that the sound quality of the
headphones dropped sharply if the headphone's speaker unit was even slightly away from the
ear. Alternatively, even in the case of an open type headphone, there is a drawback that the
sound quality is thin if the user slightly deviates from the wearing in which the predetermined
positional relationship with the ear is maintained.
[0019]
In addition, small stereo devices such as those found in radio cassette players etc. and televisions
capable of receiving audio multiplex stereo broadcasts output the sound of left L channel and
right R channel completely electrically from two separate speaker units dedicated to each other.
These two speaker units are disposed at both ends of a plastic lightweight single-box case (not
shown), and the left L channel and right R channel sound waves are generated. Interferes
through the lightweight one-box case, and the distance between the two speaker units is narrow,
and the sound waves of the left L and right R channels are mixed in the adjacent space before the
listener Even though it is a stereo device at a great angle, it can not reach to enjoy its threedimensional sound image localization.
[0020]
The present invention eliminates such a drawback and listens to a good sound that can only be
obtained with a high-grade headphone or a large-sized speaker, that is, a strong bass and a sense
of three-dimensional sound image localization true to the original sound without wearing
cumbersome headphones. To be given to the
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7
In addition, we want to reduce the attenuation of the volume even if the room construction of the
installation location is a sound absorption structure that is not desirable in terms of sound
effects. Therefore, I would like to reduce the price if it is as effective as conventional. In addition,
I want to hear the sound that has not been muddy, which makes the listener not get tired, does
not get tired, reduces the degree of blocking speech, and makes me comfortable listening. This is
likely to be achieved with a loudspeaker that does not have a resonant box.
[0021]
In addition, for the implementer of the present invention, it is desired to ensure the most
effective result without waste of trial and error and without any failure. And I want to make the
function of a back sound shielding board to become an effective combination, and also reduce
the waste of material removal.
[0022]
In addition, by modifying an accordion curtain or the like, which is a fitting for an indoor
partition, it is desirable to double as a back sound shielding plate while utilizing the function as
the fitting.
[0023]
Another object of the present invention is to provide a speaker that can be enjoyed by applying
to a pillow for bedding or a pillow of an easy chair.
In addition to conventional developmental applications to AV equipment, high-quality voice is
small, lightweight, and inexpensive even for electronic electronic application equipment of a type
that did not previously belong to the first purpose category of sound quality. I want to offer as it
is.
[0024]
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8
According to the first aspect of the present invention, there is provided a speaker unit, a direct
sound transmitting portion for transmitting only direct sound from the front of the speaker unit,
and indirect sound from the back of the speaker unit. It has a back sound shielding part that
shields against the front direction. As a result of this, with regard to the peripheral structure of
the speaker unit, the degree of freedom in design for the material, size, configuration and shape
is increased, enabling novel design without being trapped by the configuration and shape of the
conventional speaker system, A high quality speaker system can be easily provided.
[0025]
According to the second aspect of the present invention, in the speaker system in which the
speaker unit is disposed in the hole of the baffle plate, the frame of the speaker unit is movable in
the vibration direction of the cone sheet by a stroke about the vibration width of the cone sheet.
It engaged with the baffle board with the structure. By doing this, it is possible to omit a heavy
and bulky resonance box and obtain a high-fidelity reproduced sound.
[0026]
In the invention according to claim 3, the edge of the hole of the baffle plate is provided with a
mounting guide having a recess in which the edge of the frame can be accommodated with a
margin in its external dimensions, and the recess is interposed in the recess The frame was
placed. By doing this, in the case of a casing made of resin molding or the like, the invention of
claim 2 can be easily implemented without increasing the number of parts and the number of
assembling steps.
[0027]
In the invention according to claim 4, the frame or the edge of the outer portion integrally
coupled to the frame is provided with a mounting guide having a recess which can be
accommodated with a margin in the outer dimension thereof, and the recess via the vibration
absorbing member The frame or the outer portion was disposed. By doing this, the invention of
claim 2 can be easily implemented regardless of resin molding, wood, etc., and the material of the
support member, the housing, etc., and the external shape, size and weight of the speaker unit.
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[0028]
In the invention according to claim 5, the mounting guide is provided as a separate part. By doing
this, the invention of claim 2 for the speaker utilizing device of any shape regardless of resin
molding, wood etc. and the material of the support member, the housing etc. and the external
shape, size and weight of the speaker unit. Can be implemented easily. And since it can retrofit to
an existing product, it is pleased with an acoustic enthusiast, and it can be separately
commercialized separately only the said attachment guide and the said vibration absorption
member.
[0029]
In the invention according to claim 6, the speaker units for independently outputting the left L
channel and right R channel sounds constituting stereo three-dimensional sound image
localization face each of the listener's left and right ears. In the arranged speaker, a speaker unit
dedicated to the left L channel, a first baffle plate for flexibly holding the speaker unit through
the vibration absorbing member, a speaker unit dedicated to the right R channel, and a vibration
absorbing member for the speaker unit And a vibration absorbing member interposed between
the first baffle plate and the second baffle plate, and the first baffle plate and the second baffle
plate are made flexible. Bonded to
[0030]
As a result, there is no feeling of wearing headphones, and the sound that is heard even if the ear
is at a distance from the speaker system is not sharply diminished.
In addition, it does not cancel out the sound in the low frequency range, and the left L channel
and the right R channel are not distinguished, and the indirect sound generated by harmful
interference waves is absorbed and eliminated by the sound absorbing material, and only the
direct sound is heard As it is delivered, the listener can be given a powerful bass and a sense of
three-dimensional sound image faithful to the original sound, which can only be obtained with
high-grade headphones or a large speaker system.
[0031]
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10
Also, it is open to the outside world and the ear is not blocked. And, even if the ear is slightly
separated from the speaker unit, the sound quality is not sharply diminished like headphones,
and the sound of the outside world can also be heard. In other words, it is a speaker that
combines an orthodox speaker system with a resonance box and the goodness of headphones.
[0032]
In addition, the speaker system of the present invention is applicable because it is not necessary
to independently arrange two speaker boxes consisting of completely independent housings with
left L channel and right R channel in a small size, light weight and simple single configuration.
The scope of coverage is wide. For example, it is also suitable for a simulation education training
apparatus or a simulation game apparatus which is an extension of audiovisual education
equipment.
[0033]
In the invention according to claim 7, a pillow for bedding or a speaker unit built in a pillow of an
easy chair, the direct sound transmitting part, and the back sound shielding part as a cushion for
the pillow or the pillow. It has a cushion material that can also be used as a material. By doing
this, it is possible to hear a good sound comparable to a large-sized speaker despite the use of the
cushion material of the pillow without wasting, though it is a small and lightweight speaker built
in the pillow.
[0034]
In the invention according to claim 8, a hard resin short having a thickness of 0.5 to 1.5 mm, an
outer diameter of 5 to 15 mm, and a pipe length of 5 to 20 mm for the direct sound transmitting
portion and the back sound shielding portion. Equipped with a tube. By doing this, the material
and the approximate dimensions of the members constituting the direct sound transmitting
portion and the back sound shielding portion, which is the gist of the invention, are specified, so
that the trial and error waste for the implementer of the present invention. No mistakes, no
mistakes, and the most effective results are surely obtained.
[0035]
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11
In the invention according to claim 9, a base provided with a recess for storing the speaker unit
on the substantially upper surface of the vibration absorbing member having high air
permeability and elasticity, and a speaker unit having the voice emitting surface stored outward
in the recess. A protective member for protecting the vocalization surface of the speaker unit,
and a pillow cushion material made of the hard resin short tube covering the vocalization surface
are provided.
[0036]
By doing this, the acoustic characteristics can be optimally set while effectively utilizing the
member having a superior relaxation effect as a single support structure for the speaker unit
even when used for the pillow itself, and for the user's both ears Maintain proper placement and
still maintain flexibility so that with a minimal number of parts and assembly effort, you get a
good sound comparable to a large speaker despite the small, lightweight speaker set on the
pillow It can be put out.
Moreover, since the structure is simple and robust, it is hard to break, and only the pillow that
touches the head can be removed from the main body and can be easily washed, so it is highly
practical.
[0037]
In the invention according to claim 10, the speaker is deployed from the edge of the diaphragm
of the speaker on a substantially extended plane of the diaphragm so as to isolate the front and
back spaces of the diaphragm, and It has a rear sound shield arranged in a positional relationship
showing the largest area. By doing this, it is possible to omit a heavy and bulky resonance box
and obtain a high-fidelity reproduced sound. Even with a small output and a small aperture
speaker, a large reproduced sound comparable to a large output and a large aperture speaker
can be obtained.
[0038]
In addition, even if the room construction of the installation place is a sound absorbing structure
which is not desired in terms of acoustic effects, it is efficient because the attenuation of the
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volume is small. Therefore, the price can be reduced if it is as effective as the conventional one.
Also, since this reproduced sound does not unnaturally emphasize a specific resonance frequency
due to the resonance box, it does not bore the listener, does not cause fatigue, and has a low
degree of blocking speech, so it is comfortable to hear. In short, you can hear the sound that has
finished without turbidity.
[0039]
In the invention according to claim 11, the rear sound shielding plate is provided which has a
mechanism for holding the positional relationship by contactless or flexible coupling with the
frame of the speaker. By doing this, it is possible to obtain a combination that makes the function
of the back sound shielding board effective.
[0040]
In the invention according to claim 12, the back sound shielding plate having the foldable
mechanism is provided. By modifying the accordion curtain, etc., which is a fitting for the indoor
partition, by using this function, it can be used also as a back sound shielding board while taking
advantage of the function as the above-mentioned joint tool. Not only can you show the presence
unnecessarily, you can not only eliminate the problem of space, but you can also reduce the
sense of psychological pressure that is typical of conventional large-sized audio equipment.
[0041]
The invention according to claim 13 is a foamed vinyl chloride board, a wood board or a plywood
plywood, the thickness of which is from 1 mm to 10 mm, and the back expansion within 3
meters from the center of the speaker unit. It was equipped with a shield. As described above, the
combination of the medium-to-small-sized speaker unit supported by the vibration absorbing
structure and the rear sound shielding plate, which is the gist of the invention, has been specified
up to those materials and approximate dimensions. There is no waste of trial and error, no
mistakes, and the most effective results can be obtained with certainty.
[0042]
In the invention according to claim 14, a perforated mat mainly composed of a bag-containing
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13
liquid or a bag-containing gel is provided as the back sound shielding portion, and the surface of
the cone paper is ventilated from the perforation portion. It was configured to be free.
[0043]
In the invention according to claim 15, the perforated mat in which the configuration of the outer
shape and the combination position corresponds to the baffle plate is provided.
According to the fourteenth and / or the fifteenth aspects, a clear reproduced sound without
turbidity is efficiently obtained without using a hard and heavy baffle plate. Therefore, it is
suitable for the use which hates hardness and heavyness, and can respond to some bending
demands. For example, it is suitable for the demand to be in direct contact with the human body
etc. by making good use of the touch.
[0044]
In the invention according to claim 16, the frame is disposed between the baffle plate and the
frame via a vibration absorbing member mainly composed of a bagded liquid or a bagged gel.
[0045]
In the invention according to claim 17, the frame is disposed in the recess through a vibration
absorbing member mainly made of a bag-containing liquid or a bag-containing gel.
By adopting the configuration according to claim 16 and / or claim 17, the elastic vibration
absorbing action is maintained for a long time as compared with the case where the main body of
the vibration absorbing member is a single material of urethane foam (sponge) or rubber.
Product life is extended.
[0046]
In the invention according to claim 18, the bag for enclosing the liquid or gel is provided with a
constriction portion, and the groove-like or wave-like unevenness generated by the constriction
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portion has a non-uniform surface. By doing this, the vibration absorbing effect is obtained that is
superior to the case where the main component of the vibration absorbing member is a foam
porous material such as urethane foam (sponge). Because liquid and gel have less volume change
due to pressure than gas and sponge, they usually do not function as a spring even if enclosed in
a piston etc., and the vibration absorption that is effective with the above-mentioned bagged
liquid or bagged gel The action is not due to the volume change, but is due exclusively to the
shape change, so it is an essential requirement that a relief space is secured when subjecting the
gel etc. to load deformation, and the uneven surface due to the groove-like or wavelike
unevenness is This is because the relief for the deformed protrusion is formed.
[0047]
Furthermore, the wavelike unevenness can ensure air permeability, and the front and back of the
cone paper can be released from the isolated and sealed state. Therefore, it is possible to exert
the goodness of not separating and sealing, and to provide high fidelity voice output. That is, for
the purpose of emphasizing only the specific frequency in the resonance box and the harm that
the free vibration of the cone paper is restrained by the damper effect by the closed air of the
closed box, the sound output of other frequency bands is suppressed. You can eliminate the
harm.
[0048]
In the invention according to claim 19, the bag for enclosing the liquid or gel is mainly made of
silicone rubber.
[0049]
In the invention according to claim 20, a gelatin or a gel of gel having a viscosity, rigidity and
elasticity to maintain self-shape barely at normal temperature, and a bag for sealing the gel have
a thickness of 0. Silicone rubber of 05 to 1 mm was used as the main material.
[0050]
A vibration absorbing structure for holding the frame via a vibration absorbing member mainly
composed of a bagged liquid or a bagged gel according to claim 19 and / or claim 20. Since the
embodiments of the present invention have been disclosed in terms of their specific materials
and the like, it is possible for the implementer of the present invention to obtain the most
effective result without waste of trial and error and without any failure.
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15
[0051]
In the invention according to claim 21, a superabsorbent polymer composed of an acrylamide
cross-linked body is used as the main material of the gel.
For example, a trial manufacture experiment was performed using a trade name "Snowpack
(registered trademark of Mie Chemical Industry Co., Ltd.)" in the corresponding part.
This is a bagged gel that is generally marketed and widespread as a household regenerator, and
because the gel maintains its shape with a konjac-like viscosity, stiffness and elasticity, it gave
optimum results for the practice of the present invention .
[0052]
Further, in the invention according to claim 22, the peripheral structure of the speaker unit
according to any one of claims 1 to 21 is applied to an electric and electronic device which emits
sound.
By doing this, it is possible to provide high quality voice as it is for small size, light weight, and
low price, even for electronic electronic application devices of a type that did not conventionally
belong to the category of sound quality primary purpose.
[0053]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be
described below with reference to the drawings. FIG. 1 is a cross-sectional view of a loudspeaker
showing a “basic” embodiment according to the invention. In the embodiment of FIG. 1, in the
speaker in which the speaker unit 1 is disposed in the hole of the baffle plate 11, the frame 15 of
the speaker unit 1 has a stroke of about the amplitude of the cone 27 in the vibration direction of
the cone 27; It has a structure in which the vibration from the speaker unit 1 to the baffle plate
11 is absorbed by flexibly engaging the baffle plate 11 with a vibration absorbing structure
which can be advanced and retracted.
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[0054]
Further, at the edge of the hole of the baffle plate 11, a pillar 3 having a smooth surface with a
large portion covered with the collar 2 is implanted toward the back side of the baffle plate 11,
and the end of the pillar 3 An external thread is engraved on the part, and the position control
member 50 is bolted to a predetermined position. Further, the sleeve 4 is attached to the fixed
screw hole of the frame 15, and the inner diameter of the sleeve 4 and the outer diameter of the
support 3 are engaged with each other without rattling through the collar 2, The forward and
backward movement of the frame 15 is flexibly restricted by the elastic force of the urethane
foam (sponge) absorbing members 17 and 18.
[0055]
In the loudspeaker of FIG. 1, sound waves 5 and 5 ′ are radiated from the loudspeaker unit 1 in
the front-rear direction of the baffle plate 11 in opposite phases. At this time, since the sound
waves 5 and 5 'before and after the baffle plate 11 are separated to some extent by the baffle
plate 11, the sound waves of opposite phases interfere with each other, are not added and are
not canceled and disappear.
[0056]
However, although the area of the baffle plate 11 is limited and the sound wave 5 'of antiphase
which wraps forward from behind the edge remains to some extent, the path to the listener's ear
(not shown) is not linear and reaches the ear Since a considerable amount of the sound wave 5 'is
attenuated before and the amount of the sound wave 5' adversely affecting the sound wave 5 as
an interference wave also becomes small, the effective bass range from the sound wave 5 can be
canceled and attenuated little. Then, if there is no obstacle or the like which absorbs and shields
the sound wave 5 which is a direct sound from the front of the speaker unit 1 to the listener's
ear, the attenuation amount of the sound wave 5 is small and the original sound is heard
faithfully.
[0057]
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17
Here, assuming that the total weight of the frame 15 and the baffle plate 11 including the
magnet and the like is zero and the installation of the frame 15 and the baffle plate 11 is not
rigid either, the electromagnetic properties of the voice coil (the cone paper 27 is not shown) The
driving force causes the frame 15 to move backward as the reaction advances, and the baffle
plate 11 supporting the frame 15 is also moved backward. At this time, a sound wave 5 'which is
an interference wave is emitted in the backward direction of the frame 15 and the baffle plate
11. Then, since a good sound can not be produced, means for preventing the generation of the
sound wave 5 'which is this interference wave are as follows.
[0058]
1) Install the frame 15 firmly so as not to vibrate. 2) The area of the baffle plate 11 is increased
to infinity, and the baffle plate 11 is firmly installed so as not to vibrate. 3) Weighting the frame
15 and the baffle plate 11 to infinity so that they do not easily vibrate. 4) Equipped with a heavy,
robust and large volume conventional speaker box.
[0059]
The above means 1), 2) and 3) have limited applications and are unrealistic, and 4) is not suitable
for a small, lightweight and inexpensive speaker system, so the frame 15 can be freely used by
the reverse idea. I will make it vibrate. Although the weight of the frame 15 including the magnet
has been reduced by the recent development of the magnet material, the weight of the frame 15
including the magnet is much more than the total weight of the voice coil and the cone paper 27
not shown. Although heavy, the area of the frame 15 for vibrating air is generally smaller than
that of the cone paper 27, and the antiphase sound waves 5 'generated by the frame 15 itself are
negligible.
[0060]
However, if the baffle plate 11 is integrally connected to the frame 15, it has a considerable area,
so that the sound waves 5 'of antiphase generated therefrom have an adverse effect that can not
be ignored. Therefore, even if the frame 15 is vibrated freely, if the vibration is not transmitted to
the baffle plate 11, only the sound wave 5 which is a direct sound from the cone paper 27 can be
delivered to the listener's ear in a clean state. . Further, the baffle plate 11 resonates to some
10-05-2019
18
extent by the sound wave 5, and there is also an effect as a so-called "acoustic resonance
reflection plate" in which the sound wave 5 is energized and radiated forward.
[0061]
By such an action, a clear high-fidelity reproduced sound can be obtained without the attenuation
of the deep bass even though the resonance box is not provided. In this case, the first operation
principle "the function of isolating and shielding the sound wave 5 'of the antiphase generated
behind the cone paper 27" and the second operation principle "the resonance sound is emitted"
Both actions are considered to be strongly effective.
[0062]
FIG. 2 is a cross-sectional view of a loudspeaker illustrating an "embedded" embodiment
according to the present invention. In the embodiment of FIG. 2, the structure in which the frame
15 of the speaker unit 1 is flexibly disposed on the baffle plate 11 via the vibration absorbing
members 17 and 18 is the same as that of FIG. Covered with a fiber structure member 40 rich in
breathability, elasticity and moderate rigidity, and the sound wave 5 'diffused from the back of
the speaker unit 1 to the surrounding space to the front of the listener (not shown) Since the
sound is shielded so as not to cause an unpleasant sound from being generated behind the
speaker unit 1, the adverse effect of the interference wave is further reduced.
[0063]
In this way, the function of isolating and absorbing indirect sound including harmful interference
waves, which is an action and effect of the speaker in FIG. 1, can be further ensured by the
synergistic effect of the sound absorbing material. In addition, when various exchange
experiments were conducted regarding the material of the member 40, good results were
obtained using a recycled plastic bottle product "Curl Lock (registered trademark of Takagi
Chemical Research Laboratories)".
[0064]
In the embodiment of FIG. 2, the structure in which the frame 15 is flexibly disposed on the
baffle plate 11 via the vibration absorbing members 17 and 18 is the same as that of FIG. 1, but
10-05-2019
19
the effect of only the member 40 is also considerable. Even if the frame 15 has a structure that is
rigidly and integrally fixed to the baffle plate 11, if the member 40 is provided, a speaker having
substantially the same effect as that provided with the resonance box Can be configured.
[0065]
Furthermore, the baffle plate 11 in the embodiment of FIG. 2 may be replaced by the plate
material shown in FIG. 1 and the attachment structure to the plate material, and a rubber mat of
about 3 mm in thickness may be used.
In this case, the weight of the speaker unit 1 is supported by the member 40. The first operation
principle “the function of isolating and shielding the sound waves of the antiphase generated
behind the cone paper 27” is strongly effective.
[0066]
Also, instead of the baffle plate 11 functioning as the back surface sound shielding portion, it is
enclosed in a 0.2 mm thick silicone rubber sealing bag so that it is enclosed in a liquid having a
defined shape or similar bag. Substantially exposed, eg, protected, to the listener's ear, such that
the surface of the corn paper remains ventilated from the perforated portion, comprising a
perforated mat based on the treated gel. The configuration may be such that corn paper can be
seen through the net.
[0067]
Then, without using a hard and heavy baffle plate, a clear reproduced sound without turbidity
can be efficiently obtained.
And since the material of the perforated mat is flexible to the surface as well as the core and can
respond to some bending needs, it is suitable for applications that do not like hard and heavy
touch. For example, it is suitable for the demand to be in direct contact with the human body etc.
by making good use of the touch.
[0068]
10-05-2019
20
1 and 2 has a structure in which the frame 15 shown in FIG. 1 and FIG. 2 is flexibly disposed on
the baffle plate 11 via the vibration absorbing members 17 and 18. That is, the frame 15 of the
speaker unit 1 is 1 mm in the vibration direction of the cone paper 27. L-shaped, J-shaped or Ushaped cross section or U-shaped cross section attachment structure consisting of the speaker
unit 1 to the baffle plate 11 flexibly engaged with the baffle plate 11 with a vibration absorbing
structure that can be advanced and retracted by the above strokes " FIG. 7 is a cross-sectional
view showing an embodiment having
[0069]
In FIG. 3A, at the edge of the hole of the baffle plate 11, the edge of the frame 15 forms a
mounting guide having an L-shaped cross section which can be accommodated with ease in its
external dimensions, and the recess of the mounting guide The vibration absorbing members 38
and 39 are fitted, and the vibration absorbing members 37 are disposed so as to sandwich the
edge of the frame 15 by them and the vibration absorbing members 37. The ring member 60 for
sealing the open end of is fixed with a screw 61.
[0070]
Therefore, the edge of the frame 15 is flexibly engaged with the baffle plate 11 via the vibration
absorbing members 37, 38 and 39 so as to be able to move forward and backward with a stroke
about the amplitude of the cone paper 27 in the vibration direction of the cone paper 27.
Here, since the vibration absorbing members 37, 38, 39 absorb the reaction from the edge of the
frame 15 to the baffle plate 11 even if the cone paper 27 vibrates in the front-rear direction, the
effect of the present invention can be obtained. can get.
Further, if the baffle plate 11 is a case made of resin molding, the present invention can be easily
implemented without increasing the number of parts and the number of assembling steps.
[0071]
Here, as shown in FIGS. 3 (a), 5 (a) and 7 (a), the back sound shielding plate 51 and the baffle
plate 11 are made of a material mainly composed of a bagged liquid or a bagged gel. The entire
weight may be supported by another) or the vibration absorbing members 17, 18, 37, 38, 39
10-05-2019
21
may be configured. However, the screw holes required for the vibration absorbing members 17
and 18 in FIG. 5A are omitted from the figure, and the details of the attachment required for the
baffle plate 11 are also omitted.
[0072]
Then, the frame may be disposed on the baffle plate 11 via vibration absorbing members 37 and
38 mainly composed of a bag-containing liquid or a bag-containing gel in the recess.
[0073]
Further, the bag for enclosing the liquid or gel is provided with a constriction portion, and the
groove-like or wave-like unevenness generated by the constriction makes the baffle plate 11 and
the vibration absorbing members 17, 18, 20, 37, 38, 39 uneven. To have a good face.
By doing this, the vibration absorbing effect is obtained that is superior to the case where the
main component of the vibration absorbing member is a foam porous material such as urethane
foam (sponge).
[0074]
Because liquid and gel have less volume change due to pressure than gas and sponge, they
usually do not function as a spring even if enclosed in a piston etc., and the vibration absorption
that is effective with the above-mentioned bagged liquid or bagged gel The action is not due to
the volume change, but is due exclusively to the shape change, so it is an essential requirement
that a relief space is secured when subjecting the gel etc. to load deformation, and the uneven
surface due to the groove-like or wavelike unevenness is This is because the relief for the
deformed protrusion is formed.
[0075]
Furthermore, since the elastic vibration absorbing action can be maintained for a long time as
compared with the case where the main component of the vibration absorbing member is a
single material of urethane foam (sponge) or rubber, the product life is extended.
10-05-2019
22
And since the above-mentioned bag by resin molding processing which uses silicon rubber as a
main material of thickness 0.2 mm becomes grooved or wavelike unevenness in the abovementioned constriction part becomes a ventilation hole, air permeability is secured. Front and
rear can be released from the isolation seal.
[0076]
Therefore, the sealed resonance box described above can be eliminated, and the air behind the
cone paper can be exhibited without any improvement effect to release it from the isolated seal.
That is, for the purpose of emphasizing only the specific frequency in the resonance box and the
harm that the free vibration of the cone paper is restrained by the damper effect by the closed air
of the closed box, the sound output of other frequency bands is suppressed. You can eliminate
the harm. This ensured that the most effective results were obtained. As the reason, it is
presumed that the gel having an appropriate viscosity has an action of well absorbing an
interference wave or the like which causes the turbid noise.
[0077]
As a manufacturing problem, if the thickness of the bag is thinner than 0.05, it becomes difficult
to maintain the desired shape and quality. A bag like a rubber balloon can not maintain its
predetermined shape. Also, it is easy to tear, so the durability is insufficient. On the other hand, if
the thickness of the bag exceeds 1 mm, the hardness of the silicone rubber weakens the vibration
absorbing action even if the shape retention and the quality retention are excellent. At the
present stage, the best result is that a gelatin or konjac gel made of a material with viscosity,
rigidity and elasticity that barely maintains its shape is enclosed in a 0.2 mm thick silicone
rubber bag. The
[0078]
Specifically, a superabsorbent polymer consisting of an acrylamide cross-linked body was used as
the main material of the gel. For example, a trial manufacture experiment was performed using a
trade name "Snowpack (registered trademark of Mie Chemical Industry Co., Ltd.)" in the
corresponding part. This is a bagged gel that is generally marketed and widespread as a
household regenerator, and because the gel maintains its shape with a konjac-like viscosity,
stiffness and elasticity, it gave optimum results for the practice of the present invention .
10-05-2019
23
[0079]
Next, FIG. 4 (a) and FIG. 4 (b) show the peripheral structure of the speaker unit according to the
present invention "in the unit of parts before assembly, J letter, U letter, h letter or u letter cross
section, or U letter shape It is a principal part expanded sectional view showing an embodiment
which has "attachment structure of a section." 4A shows the speaker unit fixed from the front
side of the baffle plate 11, and FIG. 4B shows the speaker unit fixed from the back side of the
baffle plate 11.
[0080]
In FIGS. 4 (a) and 4 (b), the edge of the frame 15 can be stored in the edge of the hole of the
baffle plate 11 with a J-shape, U-shape, h-shape or U-shape which can be stored with extra space
in its external dimensions. A mounting guide 62 having a cross section and having a recess is
fixed to the baffle plate 11 with a screw 61, the vibration absorbing member 20 is fitted in the
recess of the mounting guide 62, and arranged so that the edge of the frame 15 is sandwiched by
the vibration absorbing member 20. The frame 15 is flexibly engaged with the baffle plate 11 via
the vibration absorbing member 20 so as to be able to move forward and backward with a stroke
about the amplitude of the cone paper 27 in the vibration direction of the cone paper 27.
[0081]
Here, even if the cone paper 27 vibrates in the front-rear direction, the vibration absorbing
member 20 absorbs the reaction from the edge of the frame 15 so as not to be transmitted to the
baffle plate 11, so the embodiment shown in FIG. The effects of the invention can be obtained.
According to the experiment, as shown in FIG. 4 (a), the sound is less likely to be contained as
much as the cone paper 27 comes forward than the one shown in FIG. 4 (b), and preferable
results are obtained.
[0082]
Next, FIG. 5 (a) shows vibration absorbing members 17, 18 substantially similar to the vibration
10-05-2019
24
absorbing members 37, 38 shown in FIG. 3 (a), and FIG. 5 (b) shows the peripheral structure of
the speaker unit according to the present invention. It is sectional drawing which shows the
embodiment which supported the weight of the back magnet by "the support structure which a
recessed part fits loosely through a vibration absorption member" according to the "basic" form
shown in FIG. In FIG. 5, at the edge of the hole of the baffle plate 11, the edge of the frame 80 is
flexibly moved back and forth with a stroke of 1 mm or more in the vibration direction of the
cone paper 27 via the vibration absorbing members 17 and 18. It is engaged. The form of this
engagement is substantially the same as that of FIG. 1, and although detailed description of the
detailed structure of the column 3 and the periphery thereof is omitted, the vibration absorbing
members 17 and 18 are provided between the position regulating member 50 and the baffle
plate 11. Sandwiching the edge of the frame 80 through a sandwich structure.
[0083]
There is also a support 70 provided with a mounting guide 73 having a recess, and the outer
portion of the large magnet 72 integrally coupled to the frame 80 is supported in the recess of
the mounting guide 73 via a vibration absorbing member 41. As described above, since the large
magnet 72 integrally coupled to the frame 80 is supported against the support 70 and the floor
71 so as not to transmit vibration, the type of material of the support 70 is resin molding, wood,
etc. The same effects as those of the present invention shown in the embodiment of FIG. 1 can be
obtained in any embodiment regardless of the shape, size and weight of the speaker unit.
[0084]
Moreover, as the material of the vibration absorbing members 17, 18, 20, 37, 38, 39, 41, in each
of the embodiments shown in FIG. 1, FIG. 2, FIG. 3, FIG. Good results have been obtained using
the registered trademark of the Shokai Co., Ltd., but even if there is an embodiment with a
material having equivalent elastic force and damper effect etc. or deformation of the vibration
absorbing structure, the gist of the present invention It can be regarded as containing
[0085]
And although the basic embodiment of this invention is mainly based on the light baffle plate
which abbreviate | omitted the resonance box and also assumes the case where the baffle plate is
not firmly fixed, it is mainly based on the resonance box which is not so and so. Even if the
vibration absorbing structure is applied to a speaker unit having a heavy baffle plate and whose
baffle plate is firmly fixed to the resonance box, turbidity is removed and a clearer reproduced
sound can be obtained. It is an interesting result such as
10-05-2019
25
[0086]
Therefore, even if the present invention is implemented to a speaker provided with a
conventional resonance box and a heavy baffle plate, it can be regarded as including the subject
matter of the present invention.
A person who is skilled in the art can easily think of a fragile portion such as an electric wire (not
shown) connected to the speaker unit and requiring a predetermined wiring protection or
ingenuity on the design, and thus the description thereof is omitted.
[0087]
Hereinafter, an embodiment focusing on application of the present invention to a pillow for
bedding will be described with reference to FIGS. 6 and 7.
FIG. 6 is a peripheral structure of a speaker unit according to the present invention, in addition to
the “basic” form shown in FIG. 1, a speaker showing an embodiment applied to a pillow for
bedding using a baffle plate as a back sound shielding plate FIG.
[0088]
Then, a first baffle plate 11 dedicated to the left L channel equipped with speaker units 1 and 2
for independently outputting left L channel and right R channel voices constituting stereo threedimensional sound image localization, and right R channel A dedicated second baffle plate 12 is
joined to the first and second back plates 13 and 14 in respective cross sections so as to face the
listener's ears at an appropriate angle and distance, It is a stereo speaker in which L and right R
both channels are made into a one-piece integrated structure. The first and second back plates
13 and 14 can be considered as an extension of the first and second baffle plates 11 and 12,
respectively.
[0089]
10-05-2019
26
Also, urethane between the frames 15 and 16 of the speaker units 1 and 2 and the first and
second baffle plates 11 and 12 and between the joints of the first back plate 13 and the second
back plate 14 They are joined via vibration absorbing members 17, 18 and 19 of foam (sponge).
At the junction of the first back plate 13 and the second back plate 14, a vinyl chloride elastic
joint member 7 is slightly bent and attached to the first back plate 13 while maintaining an
appropriate elasticity. The connection of the second back plate 14 is reinforced. The whole of the
stereo speaker is formed by being enclosed by a pillow material (only cushion material is referred
to) 9 and a bag 10 which will be described later, around the periphery of the continuous unitary
structure.
[0090]
In the loudspeaker of FIG. 6, sound waves 5 and 5 ′ of the left L channel are emitted from the
speaker unit 1 dedicated to the left L channel in the front-rear direction of the first baffle plate
11 as sound waves of opposite phases. At this time, since the sound waves before and after the
baffle plate 11 are separated to some extent by the baffle plate 11, the sound waves of opposite
phases interfere with each other, are not added and are not canceled and disappear.
[0091]
However, the area of the first baffle plate 11 is limited, and the material 9 of the pillow serves as
a sound absorbing material for the sound wave 5 ′ of antiphase which wraps forward from
behind the edge thereof, and the sound wave 5 ′ is relatively Since the absorption screening is
performed while passing through a long distance, and the amount of the sound wave 5 ′
adversely affecting the sound wave 5 as an interference wave is also small, the amount of
cancellation and attenuation of the bass region from the sound wave 5 may be small.
[0092]
That is, the first principle of operation, "opposite-phase shielding annihilation action generated
behind the cone paper 27" is effective.
Since the distance from the front of the left L channel dedicated speaker unit 1 to the listener's
left ear 29 is short, the attenuation amount of the sound wave 5 which is a direct sound is small,
and the original sound is heard faithfully. In addition, the material of the material 9 of the pillow,
10-05-2019
27
which will be described later, greatly affects the operation and effect even as the direct sound
transmitting portion, and the effective direct sound passes a small amount of attenuation.
[0093]
Also, with respect to the speaker unit 2, the pillow material 9 is a sound absorbing material for
the sound wave 6 ′ of the opposite phase that goes forward from behind the edge of the second
baffle plate 12 as in the speaker unit 1 and interferes with the sound wave 6. Since the adverse
effect exerted as a wave is blocked, the amount of attenuation of the bass region from the sound
wave 6 emitted by the direct sound reaching the ear 30 can be reduced.
[0094]
Also, the first and second baffle plates 11 and 12 are much smaller and lighter than the orthodox
speaker, and therefore the first and second baffle plates from the speaker units 1 and 2 through
the frames 15 and 16 If vibration is transmitted to 11 and 12, it is likely to be adversely affected
by mutual interference, so by interposing the vibration absorbing members 17, 18 and 19 and
the elastic joint member 7 so as to prevent the vibration from being transmitted The harmful
mutually interfering sound waves are shielded between the speaker units 1 and 2.
[0095]
While absorbing and shielding sound waves of audio frequency, these vibration absorbing
members 17, 18 and 19 and elastic joining member 7 maintain the structure, ie, back plate 13
and back plate 14, frames 15 and 16 and baffle plates 11 and 12 It is connected to the extent
that it does not rattle.
[0096]
In addition, if the material 9 of the pillow is, for example, an oat bowl, the protective nets 8 of the
mesh that prevent the grains of the oat bowl from entering the inside of the speaker units 1, 2
are the front and back of the speaker units 1, 2 Not shown) Arranged on the surface.
In this embodiment, a hard resin short tube of the tip size of a small finger marketed in a general
bedding store is used as a material for a large-sized, breathable pillow for the large size in the
bowl than the above-mentioned buckwheat porridge. I got the desired sound effects and a sense
of relaxation.
10-05-2019
28
[0097]
Also, the pillow outer member (outer bag) 10 is suitably a breathable cloth that does not shield
sound waves.
In addition, the fragments of the above-mentioned buckwheat porridge or resin tube are
granular, and against the problem of internal deviation of the inside of the outer member (outer
bag) 10, those divided by the inner bag of mesh (not shown) are fixed to important points such
as the baffle plate. The person skilled in the art is aware of means for protecting the user,
speaker units 1 and 2, and means for protecting fragile parts such as electric wires and the like
that require predetermined protection, means for concealing hard angles such as the baffle plate,
and securing user safety. Descriptions thereof will be omitted because they can be easily
conceived and belong to the design category.
[0098]
FIG. 7 (a) shows a back sound shielding plate 51 having a constricted portion in a bag for
containing a liquid or gel and having a non-uniform surface due to the groove-like or wave-like
unevenness generated by the constricted portion; It can be used also for the baffle plate 11
shown in the other figures.
However, when it is used as the baffle plate 11, some processing etc. are required for the
mounting structure of the speaker unit, but the details are omitted. In the same figure (b) as a
peripheral structure of the speaker unit according to the present invention, in addition to the
“embedded type” shown in FIG. It is sectional drawing of the speaker which shows
embodiment applied. While the one shown in FIG. 6 constitutes a dedicated pillow that allows the
active sound to be heard, the one in FIG. 7 focuses on the usual pillow as much as possible and
sacrifices the function of the pillow itself It makes up a speaker that produces good sound
without having to Therefore, the structural member which makes an angle like a baffle board is
excluded, and the speaker unit is held and stored only by the cushion member.
[0099]
First, a mortar-shaped depression 41, 42 is provided on the upper part of the highly airpermeable and elastic fiber structure 40 serving as the foundation of the pillow, and the left L-
10-05-2019
29
channel dedicated speaker unit 1 and the right R are formed in the depression 41, 42. The
channel dedicated speaker units 2 are respectively fitted upward, and a protective net 8 is
covered to protect the cone paper of the speaker units 1 and 2, and the protective net 8 is
completely covered with the pillow material 9 ing.
[0100]
In addition, a back sound shielding plate 51 made of a rubber mat having a thickness of about 3
mm is placed instead of the baffle plate to obtain the effect of the back sound shielding.
Then, the LR partition wall 52 is formed by filling and injecting a waterproof resin (a waterproof
function does not matter, but it is appropriate for the time being) to the central portion of the
fiber structure member 40. This waterproofing resin is filled and injected to a target location
with a dedicated injection device at the time of waterproofing work in a bathroom, washroom,
kitchen, etc. In the case of silicone resin etc., a partition maintaining elasticity is formed. This
improves the separation of the left L channel and the right R channel, and contributes to
enhancing the stereo sound effect of the present invention.
[0101]
In addition, when various materials were exchanged and experimented regarding the member 40,
the result of using cushion material "Curl lock (trademark of Takagi Chemical Research Institute)"
which is a reproduction | regeneration product of a plastic bottle is favorable. And the material 9
of the pillow is a hard resin short tube marketed to a bedding shop, specifically an outer diameter
of 8 mm of a polymer-based hard resin tube material such as polypropylene which has a
hardness that can not be crushed even when pinched with a finger. A pressure of 1 mm and a
length of 10 mm is a good sound, and is also excellent as a pillow itself. In addition, the pillow
material 9 is dispersed so as not to be biased, and the pillow material is formed by wrapping it in
appropriately divided mesh bags.
[0102]
In addition, the hard resin tube as the direct sound transmitting portion forms a cushioning
material which is hardly at least attenuating the direct sound in view of its shape, and the
10-05-2019
30
cushioning material is made of, for example, a sponge or cotton-like material from the hard resin
tube. If you replace it, it will attenuate the direct sound you need. Furthermore, the results are
not good even with the buckwheat husk mentioned above.
[0103]
In addition, it is thought that the indirect noises of the reverse phase generated from the back of
the cone paper 27 cancel each other out while repeating irregular reflection inside the curl lock,
as the rear sound shielding part infers from the shape of the material. However, the excellent
acoustic effects can be explained. Therefore, even if the front and the rear of the cone paper 27
are not divided by a hard plate corresponding to the baffle plate 11 of FIG. 2, the first operation
principle acts to obtain the same effect.
[0104]
As described above, since the hard resin short pipe is the best as an acoustic effect, it is essential
immediately above the protective net 8 and in the vicinity thereof, but the comfort of the pillow
only in other distant places, the appearance, Thoroughly pursue costs etc. and arrange the pillow
material 9 in the optimal division. Specifically, the pillow material 9 can be arranged in any
manner according to the not-shown section shape of the mesh bag. For example, the soft
polyethylene short tube etc. is made more bulky only for the part that abuts on the nape of the
user, and the high lifting liquid or the gel in a bag and the added value as a part of the product
are enhanced. And it has the effect of promoting sales.
[0105]
The technical idea to put together the whole structure in a stable manner with a level that does
not blur the sound while absorbing and blocking the harmful sound waves that interfere with
each other as described above is the gist of the invention of the pillow itself, The requirements
are as follows. (1) The installation procedure is a close positional relationship in which the user
looks near the user's ear, and in the present embodiment, the object for storing the speaker is a
pillow or the like. (2) The structure and size are such that indirect noise is blocked for the user's
ear such as the pillow to allow only direct sound to reach. (3) In addition to using the material
such as the pillow as a sound absorbing material, the vibration absorbing member is interposed
in the main part holding and storing the speaker unit, or used as a base. (4) The requirements of
10-05-2019
31
the vibration absorbing member are to maintain the flexibility to absorb and block the mutually
interfering harmful indirect waves, and to maintain the air permeability and elasticity suitable for
the application such as the pillow, and also to rattle and turbidity A stable unit without noise.
[0106]
In addition, as long as it is included in the above-described summary of the invention to be
applied to the pillow and the requirements thereof, the inventive idea as to whether or not the
amplifier is incorporated is a content that can be easily conceived by those skilled in the art. All
of the modified embodiments are considered to belong to the present invention.
[0107]
Next, with reference to FIG. 8 to FIG. 10, an embodiment of the present invention will be
described mainly focusing on a back sound shielding plate.
FIG. 8 shows a suspended embodiment of the back noise shield according to the present
invention, in which there is a suspended back noise barrier 83, literally a hanging liquid or
bagged gel baffle at a weir 87 It applies to the speaker which consists of board 86. The frame 85
that holds the edge of the speaker cone 27 in a longitudinal direction is also vibratably held in
the longitudinal direction with respect to the baffle plate 86.
[0108]
Then, a rear sound shield plate 83 is developed on both sides of the cone paper 27 and the baffle
plate 86 so as to separate the space before and after the cone paper 27 and the baffle plate 86
on a substantially extended plane. doing. Although the baffle plate 86 also forms a rear sound
shielding plate, the names are divided for convenience of illustration.
[0109]
Here, the above-mentioned "back sound shielding board" can also be considered as an "acoustic
resonance reflector", because it is also a sound source as a Passive Radiator, that is, a "passive
radiator". Is one of the two fundamental principles of the present invention and is common to all
10-05-2019
32
of the embodiments shown in FIGS. While the speaker cone paper 27 has an "active radiation
function", it has a function of inheriting the "passive vibration due to resonance from the cone
paper 27 and radiating the vibration in coordination with the cone paper 27. By having "".
[0110]
In addition, this rear sound shielding plate (hereinafter, also referred to as "passive radiator" or
"acoustic resonance reflecting plate") 83 is disposed in a positional relationship that shows the
listener substantially the maximum area. That is, even if the back sound shielding plate 83 itself
is a speaker, the positional relationship is such that the sound waves that directly reach the
listener's ear can be heard from the back sound shielding plate 83. When the applicant
confirmed the effect of the back surface sound shielding plate 83 by a pair comparison test,
compared with the state without the back surface sound shielding plate 83, in the state where
the back surface sound shielding plate 83 was present, the volume clearly appeared to the
listener. Could always be reproduced.
[0111]
Also, a vinyl chloride plate about 4 mm thick and about 60 cm wide spreads the back sound
shielding plate 83, which is approximately the same size as the baffle plate 86, on both sides
slightly away from the baffle plate 86. The best condition was the hearing effect. As shown in
FIG. 8, from the cone paper 27 at the center position of the baffle plate 86, it is within 1 meter on
one side and within 2 meters in total width. And when it exceeds 3 meters in full width, it became
a bad result, so it is desirable to fit within 3 meters in total width.
[0112]
With regard to the material of the baffle plate 86, although it is considered that almost any plate
having rigidity can exhibit the same effect, most effects can not be obtained with the cardboard.
With regard to the sense of stereo sound localization in stereo, it is preferable that the positional
relationship between the speaker dedicated to the left L channel and the right R channel and the
listener be an equilateral triangle, and that between the speakers dedicated to the left L channel
and the right R channel. It is ideal to provide a considerable space for
10-05-2019
33
[0113]
It is considered that the reflection action of the back sound shielding plate (acoustic resonance
reflection plate) 83 described above is due to the same action as the effect of the reflection plate
in the electric lighting apparatus. That is, it is an operation and effect that sends the power of the
limited energy source toward the target without waste so that the search lamp and the headlight
can not be configured without the reflector. In general, even if both the sound source and the
light source continue emitting energy, they diffuse almost equally toward the target to which
they are delivered, unless they are concentrated by the lens or reflector, so their residual value is
the square of the distance It disappears in half proportion.
[0114]
Although there is no doubt that the effect of the reflector is considered as a physical
phenomenon, there have been few examples that were actually applied to acoustic devices, and
in particular, there were almost no examples of application to stereo speakers to pursue high
fidelity reproduction shown in the present invention. . In the background where there were no
applications to stereo speakers that had spread to home use, orthodox-type stereo speakers with
a resonance box were established as stereotypes from acoustic engineers to the general public is
there. That is, it is common sense that "the speaker exhibits its original performance only in a
state of being stored in a resonance box".
[0115]
Most of the manufacturers, users, broadcasters, and others concerned do not believe that way
because they were certifying the utility of the resonant box as a track record. And, in relation to
the acoustic design of theaters and concert halls, they were conscious of the sensory utility of the
reflected sound. However, it is research of the meaning attachment that the delay time of the
reverberation sound to the sound source is felt to be an interesting sound on hearing. Although
this back sound shielding plate 83 can easily understand that sound waves can be efficiently
delivered to a listener who is located in front of a speaker serving as a sound source, it is possible
to actually carry out test research. As we do not see much of the precedents we have shown here
the embodiment with the best results.
[0116]
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34
By doing this, it is possible to obtain a large reproduced sound with high fidelity comparable to a
large output and a large aperture speaker even with a small output and small aperture speaker.
Therefore, the price can be reduced naturally if it is of the same efficacy as the conventional one.
A high-fidelity playback sound comparable to an orthodox-type stereo speaker with a resonance
box and an amplifier with equivalent output, which conventionally costs 500,000 yen, is a simple
small-output small-diameter speaker with only a few tens of thousands of yen Can be realized by
In addition, even if the room construction of the installation place is a sound absorption structure
which is not desired in acoustic effect, for example, a Japanese-style room (not shown) with a
close-up containing a duvet, an efficient acoustic device with little attenuation of volume. Can
provide.
[0117]
Also, a mechanism for maintaining the positional relationship between the cone paper 27 and the
back sound shielding plate 83 by a contactless or flexible coupling (not shown) with the frame
85 of the speaker, that is, hanging the parts on the hook 87 It has a gel structure. The means for
holding the frame 85 and the baffle plate 86 by means of the flexible connection is as shown in
FIGS. 1 to 5 already, and the effect of installing the back sound shielding plate 83 according to
the present invention is obtained by using the holding means together. Combination that can
make the most of By doing this, it is possible to omit a heavy and bulky resonance box and obtain
a high-fidelity reproduced sound. Therefore, the price can be reduced if it is as effective as the
conventional one. Also, since the reproduced sound does not artificially emphasize a specific
resonance frequency, it does not bore the listener, does not cause fatigue, and has a low degree
of blocking speech, so it is comfortable to hear.
[0118]
Further, FIG. 9 shows an embodiment in which the back sound shielding plate according to the
present invention is implemented in a folding style. The back sound shielding plate 97 shown in
FIG. 9 is supported so as to be foldable in a flap shape on both sides of the baffle plate 99 by a
resin hinge 98 manufactured for the purpose of not requiring oil supply. This rear sound shield
plate 97 is a vinyl chloride plate with a thickness of about 4 mm, and spreads both wings equal
in size and at an angle that envelops the listener on both sides of the baffle plate 99 by the same
size as the baffle plate. In a state of being erected in an upright position, the auditory effect was
optimized. In a word, the arrangement that shows the listener the maximum area is good. The
10-05-2019
35
entire width dimension is the same as that of the embodiment of FIG.
[0119]
As shown in FIG. 8 and FIG. 9, the overall arrangement in a substantially vertical flat plate
configuration makes it possible to reduce constraints on the installation location, indoor
construction, and even balance on design. In addition, it is not bulky and the burden on
movement and storage is reduced. Or since it is the structure of the substantially flat form as a
whole, it is easy to gather the novel design of those surfaces, it is easy to acquire a sales
promotion effect, and the enjoyment in which a user pastes a wallpaper, a poster, etc. is left. And
if it is expected that it will gradually spread in recent years and that all television screens will be
replaced with CRT flat panels in the near future, conventional audio and video that has been
unified by box type design (hereinafter referred to as "AV") Devices are also likely to be unified in
the design of vertical flat plates in the future.
[0120]
Furthermore, the housing situation of the general public in Japan today is badly narrow, and
there are cases where AV devices for constructing rich living spaces are, by nature, squeezing
people's living spaces conversely In order to eliminate such an overturning phenomenon, it is
urgent to commercialize and disseminate a near-future AV device having a functional beauty and
unified by the design of the vertical plate by applying the present invention. It is.
[0121]
In addition, while still being interested in a large number of people, there is a market name such
as "AV Surround" or "Home Theater", which is not popular yet, and "have synergy in image and
stereo sound image localization. The dedicated software playback device etc., including the
speaker system unified with the design of the vertical flat plate as mentioned above, will be
popularized if it is a low-priced AV device, and the commercial broadcast BS started Together
with digital broadcasting and Internet distribution of television broadcast programs, it
contributes to the industrial development of AV-related devices and software distribution.
[0122]
Further, FIG. 10 shows an embodiment in which the back sound shielding plate according to the
present invention is implemented as a foldable "accordion curtain type" or "slide and shutter
10-05-2019
36
type".
In FIG. 10, the rear sound shielding plate (hereinafter also referred to as "accordion curtain") 100
which can be folded like a lightweight resin accordion curtain has a thickness of about 3 mm to
10 mm, unlike the thin polyvinyl chloride sheet. An openable / closable fitting for indoor
partition, in which a strip-like plate about 10 cm wide is hingedly connected, and slidably
suspended by a sliding fitting 78 on a rail 79 of a living room.
[0123]
The accordion curtain 100 is disposed openably and closably with the both sides of the baffle
plate 86 (only the left wing in FIG. 10) as a door.
With regard to the area and positional relationship with the baffle plate 86, the accordion curtain
100 can be optimally selected depending on the relationship with the features of the room to be
installed, and can be opened as necessary.
[0124]
In addition, a rear sound shield (also referred to as a "slid shutter" hereinafter) 101 foldable like a
slide shutter shown in the right wing in FIG. 10 is also a strip having a thickness of about 3 mm
to 10 mm and a width of about 10 cm. The sliding plate 78 is slidably suspended by the sliding
fitting 78 on the rail 79 of the cigar to make it possible to overlap and unfold, as in the case of
horizontally opening and closing the window blind instead of the hinge connection. It is the same
as the accordion curtain 100 in that it is an openable / closable member for an indoor partition,
and can be opened as needed.
[0125]
Therefore, by utilizing the functions originally provided to the accordion curtain 100 and the
slide shutter 101, it is possible to cope with it in any way.
Similarly, even if a back door capable of moving and opening and closing by means of a sliding
door, a door, etc., is constructed, the optimum embodiment should be obtained, as long as it is
10-05-2019
37
designed in combination with the baffle plate 86. It can be regarded as included in the invention.
[0126]
Next, with reference to FIG. 13 to FIG. 16, a product design drawing according to an embodiment
of the present invention will be described by showing a first example to a fourth example. In
addition, since an effect is substantially equivalent to the thing of FIG. 2, most of description of
an effect | action is abbreviate | omitted. FIG. 13 shows a first example of a product design
drawing, and FIG. 13 (a) is a front view thereof, FIG. 13 (b) is a sectional view taken along line AA
of FIG. Is an exploded or assembled view of the A punching board or a decorative metal mesh or
a saran net (framed protective netting) 88 or the like in FIG. 6C may have a role of protecting the
cone paper 27 and maintaining the entire outer shape.
[0127]
Then, a perforated-mat type back sound shielding plate 51a mainly made of gel with a bag is
disposed instead of the baffle plate. Although only one speaker unit 1 is shown in FIG. 13, a
plurality of the speaker units 1 may be provided to provide a stereo effect. The curl lock member
40a is a member of a fiber structure that is rich in air permeability and elasticity, and also has
appropriate rigidity, so it flexibly holds the small-to-medium-sized lightweight speaker unit 1 at a
predetermined position. The back cover 89 may be made of the same material as that shown in
FIG. 13C, and is made of a punching board or a decorative wire mesh, but it may have a role of
maintaining the outer shape to some extent and attaching and supporting the whole. . The back
cover 89 may be an inexpensive sheet metal or a veneer regardless of the air permeability if it is
used in close contact with a flat wall.
[0128]
FIG. 14 shows a second example of a product design drawing, and FIG. 14 (a) is a front view
thereof and a longitudinal sectional view taken along the line B--B in FIG. And the figure (b) is a
horizontal sectional view in the figure (a) CC arrow line. The curl lock portion 40b has a
substantially camber-like shape, and on the front convex surface thereof, a back sound shielding
plate 51b made of a perforated mat mainly made of gel is covered from the front.
10-05-2019
38
[0129]
Although a punching board or a decorative wire mesh or a saran net (framed protective net) or
the like 88a is omitted from the figure (a), the description will be omitted because it is a wellknown technology that is easy to design and manufacture by those skilled in the art. The same
applies to FIGS. 15 and 16 below. Here, since the back surface sound shielding plate 51b wraps
the front of the speaker unit 1 as a sound source with a bowl-shaped curved surface, the front
and back of the speaker unit 1 is efficiently isolated and blocked in area, so a flat surface back
surface sound shielding plate 51a Achieve the purpose in a smaller area than. Therefore, the
whole can be made small and light and good sound can be produced.
[0130]
FIG. 15 shows a third example of a product design drawing, and FIG. 15 (a) is a front view
thereof, and FIG. 15 (b) is a cross-sectional view taken along line DD in FIG. The curl lock
member 40c has a terrace-like outer shape with the top of the quadrangular pyramid cut away
and having a radius of less than the middle, that is, the four sides look trapezoidal. The terraced
curl lock member 40c has a central portion of its top surface. A bowl-shaped hole is provided,
and the speaker unit 1 is disposed upward in the bowl-shaped hole. Here, the back sound
shielding plate 51c is shaped like a square bowl with a round hole in the bottom and is thus
disposed so as to wrap the speaker unit 1 from the front thereof. As a result, since the back
sound shielding plate 51c isolates and blocks the front and back of the speaker unit 1 efficiently
in area, the object is achieved with an area narrower than the back sound shielding plate 51a
made of a flat plate. Therefore, the whole can be made small and light.
[0131]
FIG. 16 is a fourth example of a product design drawing, and FIG. 16 (a) is a front view thereof,
and FIG. 16 (b) is a sectional view taken along the line E--E in FIG. And there is a curl lock
member 40d in the form of a bowl-like hole in the center, like a round-breaded flat bottom pan
(shabu-shabu pan or pancake pan) on the bottom, turned upside down, The speaker unit 1 is
disposed in a mortar-like hole. Here, the back sound shielding plate 51 d is shaped like a flat
bottomed round pan with round holes in the bottom of the front and rear of the speaker unit 1,
and the speaker unit 1 is thus disposed so as to wrap from the front thereof . As a result, since
the back sound shielding plate 51 d efficiently isolates and blocks the front and back of the
speaker unit 1, the object is achieved with an area narrower than the flat back sound shielding
10-05-2019
39
plate 51 a. Therefore, the whole can be made small and light. In all the drawings, the same
reference numeral is given to the part having the same functional effect to avoid the repetition of
the description.
[0132]
According to the invention as set forth in claim 1, with regard to the peripheral structure of the
speaker unit, the degree of freedom in design for the material, size, configuration and shape is
increased, so that the speaker system is not trapped by the configuration and shape of the
conventional speaker system. New designs can be made, and high-quality speaker systems can be
provided easily.
[0133]
According to the second aspect of the present invention, a heavy and bulky resonance box can be
omitted, and a high-fidelity reproduced sound can be obtained.
And a light baffle plate which omits the resonance box forms a back sound shield, and even if the
baffle plate is not firmly fixed, even a small output and a small aperture speaker is comparable to
a large output and a large aperture speaker , You can get playback sound. Therefore, the price
can be reduced if it is as effective as the conventional one.
[0134]
Also, since this reproduced sound does not unnaturally emphasize a specific resonance frequency
due to the resonance box, it does not bore the listener, does not cause fatigue, and has a low
degree of blocking speech, so it is comfortable to hear. In short, you can hear the sound that has
finished without turbidity. In addition, since the baffle plate acts so as not to offset the sound
particularly in the low-pitched range, it is possible to obtain a powerful, high-fidelity clear
reproduction sound despite the absence of a resonance box. And, the installation space can be
minimized, and the degree of freedom of arrangement is increased.
[0135]
Also, since harmful interference waves are absorbed and shielded between the frame of the
speaker unit and the baffle plate, the playback sound of the speaker is transmitted to the LP
10-05-2019
40
record player installed on the same floor as the speaker of the present invention and being
reproduced. There is no occurrence of howling phenomenon that is adversely affected by
reduction.
[0136]
According to the third aspect of the present invention, in the case of a casing made of resin
molding or the like, the invention of the second aspect can be easily implemented without
increasing the number of parts and the number of assembling steps.
[0137]
According to the invention of claim 4, the invention of claim 2 can be easily implemented
regardless of resin molding, wood, etc., and the material of the support member, the casing, etc.,
and the external shape, size and weight of the speaker unit. .
[0138]
According to the invention of claim 5, according to the present invention, it is possible to use the
speaker utilizing apparatus of any shape regardless of the resin molding, the material of the
wooden or the like and the supporting member, the housing, etc. The invention of claim 2 can be
implemented easily.
And since it can retrofit to an existing product, it is pleased with an acoustic enthusiast, and only
the attachment guide and the vibration absorbing member can be separately commercialized
separately.
[0139]
Also, according to the invention of claim 6, there is no feeling of wearing headphones, and the
sound heard is not sharply reduced even if the ear is at a distance from the speaker system.
In addition, it does not cancel out the sound in the low frequency range, and the left L channel
and the right R channel are not distinguished, and the indirect sound generated by harmful
interference waves is absorbed and eliminated by the sound absorbing material, and only the
10-05-2019
41
direct sound is heard As it is delivered, the listener can be given a powerful bass and a sense of
three-dimensional sound image faithful to the original sound, which can only be obtained with
high-grade headphones or a large speaker system.
[0140]
Also, it is open to the outside world and the ear is not blocked.
And, even if the ear is slightly separated from the speaker unit, the sound quality is not sharply
diminished like headphones, and the sound of the outside world can also be heard. In other
words, it is a speaker that combines an orthodox speaker system with a resonance box and the
goodness of headphones.
[0141]
In addition, the speaker system of the present invention is applicable because it is not necessary
to independently arrange two speaker boxes consisting of completely independent housings with
left L channel and right R channel in a small size, light weight and simple single configuration.
The scope of coverage is wide. For example, it is also suitable for a simulation education training
apparatus or a simulation game apparatus which is an extension of audiovisual education
equipment.
[0142]
According to the seventh aspect of the present invention, although the cushion material of the
pillow is used as it is without waste, good sound comparable to a large-sized speaker can be
heard despite the small and light speaker built in the pillow.
[0143]
Further, according to the invention as set forth in claim 8, since the materials and approximate
dimensions of the members constituting the direct sound transmitting portion and the back
sound shielding portion, which is the gist of the invention, are specified, it is possible for the
implementer of the present invention. There is no waste of trial and error, no mistakes, and the
most effective results can be obtained with certainty.
10-05-2019
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[0144]
According to the invention of claim 9, the acoustic characteristic can be optimally set while
utilizing the member having a relaxing effect excellent even when used for the pillow itself as a
single support structure for the speaker unit without waste. Maintain the proper placement for
both ears of the person and keep it flexible, so with a small number of parts and assembly manhours, it is a small and lightweight speaker set for a pillow, yet it is a large speaker I can make a
comparable good sound.
Moreover, since the structure is simple and robust, it is hard to break, and only the pillow that
touches the head can be removed from the main body and can be easily washed, so it is highly
practical.
[0145]
Also, according to the invention as claimed in claims 10 to 13, it is possible to omit a heavy and
bulky resonance box and to obtain a high-fidelity reproduced sound.
Even with a small output and a small aperture speaker, a large reproduced sound comparable to
a large output and a large aperture speaker can be obtained. In addition, even if the room
construction of the installation place is a sound absorbing structure which is not desired in terms
of acoustic effects, it is efficient because the attenuation of the volume is small. Therefore, the
price can be reduced if it is as effective as the conventional one. Also, since this reproduced
sound does not unnaturally emphasize a specific resonance frequency due to the resonance box,
it does not bore the listener, does not cause fatigue, and has a low degree of blocking speech, so
it is comfortable to hear. In short, you can hear the sound that has finished without turbidity.
[0146]
Further, according to the invention of claim 11, a combination can be obtained which makes the
function of the back sound shielding board effective.
[0147]
Further, according to the invention of claim 12, by modifying the accordion curtain or the like
10-05-2019
43
which is a fitting for the indoor partition, it can also be used as a back sound shielding plate
while making use of the function as the fitting, so that Not only can the presence of the back
sound shielding board be shown unnecessarily, it will not only eliminate the problem of space,
but it will also reduce the sense of psychological oppression that is typical of conventional largesized audio equipment and the like.
[0148]
According to the invention as set forth in claim 13, the construction consisting of the
combination of the small-to-medium-sized speaker unit supported by the vibration absorbing
structure and the back sound shielding plate, which is the gist of the invention, is specified to
their materials and approximate dimensions. Therefore, for the implementer of the present
invention, it is possible to obtain the most effective result without waste of trial and error and
without any failure.
[0149]
Also, according to the invention of claim 14 and / or claim 15, a clear reproduced sound without
turbidity can be efficiently obtained without using a hard and heavy baffle plate.
Therefore, it is suitable for the use which hates hardness and heavyness, and can respond to
some bending demands.
For example, it is suitable for the demand to be in direct contact with the human body etc. by
making good use of the touch.
[0150]
According to the invention of claim 16 and / or claim 17, the elastic vibration absorbing action is
maintained for a long time as compared with the case where the main body of the vibration
absorbing member is a single material of urethane foam (sponge) or rubber. Product life is
extended.
[0151]
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44
According to the eighteenth aspect of the present invention, the vibration absorbing effect is
obtained that is superior to the case where the main component of the vibration absorbing
member is a foamed porous material such as urethane foam (sponge).
Because liquid and gel have less volume change due to pressure than gas and sponge, they
usually do not function as a spring even if enclosed in a piston etc., and the vibration absorption
that is effective with the above-mentioned bagged liquid or bagged gel The action is not due to
the volume change, but is due exclusively to the shape change, so it is an essential requirement
that a relief space is secured when subjecting the gel etc. to load deformation, and the uneven
surface due to the groove-like or wavelike unevenness is This is because the relief for the
deformed protrusion is formed.
[0152]
Furthermore, the wavelike unevenness can ensure air permeability, and the front and back of the
cone paper can be released from the isolated and sealed state.
Therefore, it is possible to exert the goodness of not separating and sealing, and to provide high
fidelity voice output. That is, for the purpose of emphasizing only the specific frequency in the
resonance box and the harm that the free vibration of the cone paper is restrained by the damper
effect by the closed air of the closed box, the sound output of other frequency bands is
suppressed. You can eliminate the harm.
[0153]
Also, according to the invention as set forth in claim 19 and / or claim 20, a vibration absorbing
structure for holding the frame via a vibration absorbing member mainly composed of a bagged
liquid or a bagged gel, which is the gist of the invention. Since the embodiments of the present
invention have been disclosed in terms of their specific materials and the like, it is possible for
the implementer of the present invention to obtain the most effective result without waste of trial
and error and without any failure.
[0154]
Further, according to the invention of claim 21, it is most suitable for the practice of the present
invention, since the gel is used to maintain the shape with konjak-like viscosity, rigidity and
elasticity by using a gel in a bag generally marketed and widespread as a household regenerator.
10-05-2019
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Brought results.
[0155]
Further, according to the invention of claim 22, high-quality voice can be provided as it is for
small size, light weight and low price, even for electronic / electric application devices of a type
not conventionally belonging to the first purpose sound quality category.
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