close

Вход

Забыли?

вход по аккаунту

?

DESCRIPTION JP6326649

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP6326649
An object of the present invention is to efficiently transmit kinetic energy converted from electric
energy of an audio signal to a curved diaphragm without suppressing the vibration of the curved
diaphragm, and to generate hearing loss and hearing loss by louder sound emission. It is possible
to provide a speaker which can be heard by the person without inconvenience and which can be
reduced in weight and size and easily manufactured. A speaker (10) of the present invention
supports a diaphragm (1) curved in one direction, a driver unit (2) for vibrating the diaphragm
according to an input electric signal, the diaphragm and the driver unit. And at least a frame 3.
The vibrating plate is attached to the frame via the edge portion 15 which does not prevent the
vibration at one end side and the other end side of the bending direction. Further, the driver unit
is in contact with one surface of the diaphragm and is fixed to the frame. [Selected figure] Figure
4
スピーカ
[0001]
The present invention relates to a speaker that can hear both barrier-free and hearing-impaired
people without distinction between hearing-impaired and hearing-impaired people, and, more
specifically, it enables hearing-impaired people to hear speech with hearing-impaired people
without wearing a hearing aid. The invention relates to a technology that can be lightened and
miniaturized, and can be easily manufactured.
[0002]
12-04-2019
1
There are many dynamic type speaker units in general as speakers incorporated in audio
equipment.
The speaker unit includes a donut shaped magnet (permanent magnet), a voice coil inserted in a
cylindrical space corresponding to an inner hole of the magnet, and a conically shaped
diaphragm attached to the voice coil ( (Corn) at least. In such a speaker, when an audio signal
flows through the voice coil, the voice coil vibrates back and forth in accordance with the
waveform, and the diaphragm attached to the voice coil oscillates together to form a waveform
equal to the audio signal. Sound is generated by generating compression waves (longitudinal
waves).
[0003]
In addition, there is also known a flat speaker in which a flat diaphragm (flat diaphragm) is
vibratably fixed to a rectangular frame, and such flat speaker is produced by the vibration of the
flat diaphragm. It pushes air in a large area in parallel to create compression waves and emits
noise.
[0004]
However, it has been difficult for a hearing impaired person to listen to a satisfactory voice
without putting on a hearing aid, even for a speaker using a cone and a speaker using a flat
diaphragm.
[0005]
Therefore, as a speaker for generating a sound that can be heard by a deaf person, it has a case
of hollow structure, a drive unit housed in the case, and a curved diaphragm disposed on the
surface of the case, and vibration of the drive unit Has been proposed by the applicant in such a
manner that the speaker is transmitted to the edge of the curved diaphragm to emit sound (see,
for example, Patent Documents 1 and 2).
[0006]
A speaker using such a curved diaphragm is known to be capable of producing a sound emission
that can be heard without hearing aids, as well as hearing aids, but not all hearing aids.
12-04-2019
2
Furthermore, it has been confirmed that the loudspeaker using the curved diaphragm according
to the invention described in Patent Literatures 1 and 2 can be clearly heard even in a long
distance in a subsequent demonstration test.
[0007]
However, in the case of the speakers of Patent Documents 1 and 2, the curved diaphragm is
disposed so as to cover the opening provided in the housing, and the drive unit is mounted in
contact with the edge of the curved diaphragm. Therefore, there is a problem that it can not be
installed or mounted depending on the use because the structure is large and the space factor is
bad.
For example, when installing on a wall or ceiling of a building, installing on an automobile, a
railway vehicle, an aircraft, etc., or installing it on an electronic device or a portable terminal, it is
difficult to achieve sufficient lightness and downsizing It is a thing.
[0008]
On the other hand, a rectangular diaphragm is formed to be curved along its length direction,
and both ends thereof are supported while being further pressurized in the bending direction via
a pressurizing means, and a driver is provided at substantially the center of the diaphragm. There
has also been proposed a speaker that is mounted and driven to emit sound.
(See, for example, Patent Document 3). If the driver is attached to the substantially central
portion of the curved diaphragm as described above, it is possible to reduce the size and weight
as compared with the speakers of Patent Documents 1 and 2 in plan.
[0009]
By the way, in order to emit a loud and clear sound with a loudspeaker using a curved
diaphragm, it is ideal to transmit all the kinetic energy of the drive unit converted from the
electrical energy to the curved diaphragm.
[0010]
12-04-2019
3
However, in the case of the speaker of Patent Document 3, both end portions of the curved
diaphragm are supported in a state where a constant pressure is always applied via a pressure
means such as a shock absorbing material.
Therefore, when the kinetic energy converted from the electrical energy of the audio signal is
transmitted to the curved diaphragm side, the pressing means may suppress the vibration of the
curved diaphragm and reduce the transmission efficiency of the kinetic energy from the driver. It
is thought that it is likely to be more loud and loud and can not emit loud noise.
[0011]
Moreover, in the speaker of Patent Document 3 described above, the magnetic circuit is attached
to the curved diaphragm, so to speak, the driver is dangling from the curved diaphragm, so the
kinetic energy transmitted to the curved diaphragm by reaction of the driver is It is thought that
it will reduce (cancellation).
[0012]
Patent No. 5668233 JP, 2016-140060, A Patent No. 3905814
[0013]
The present invention has been made in view of the above circumstances, and efficiently
transmits kinetic energy converted from electric energy of an audio signal to the curved
diaphragm without suppressing the vibration of the curved diaphragm, and more effectively. The
purpose is to provide a speaker that can be heard by both the deaf person and the hearing
person without inconvenience due to the loud and clear sound emission, and that the weight and
size can be reduced, and that it can be easily manufactured. Do.
[0014]
A speaker according to the present invention is an acoustic device that allows both a hearing
impaired person and a hearing person to hear voice, and includes a diaphragm curved in one
direction from one end to the other, and an input electric signal Of at least a driver unit for
vibrating the diaphragm and a frame for holding the diaphragm and the driver unit, wherein the
diaphragm is such that the one end side and the other end side prevent the vibration. The driver
unit is attached to the frame through an edge portion having no hardness and shape, and the
driver unit is in contact with one surface of the diaphragm and fixedly attached to the frame. It is
12-04-2019
4
a thing.
[0015]
Further, in the speaker according to the present invention, the driver unit may be attached to any
one surface of the diaphragm.
That is, the driver unit may be attached to any one of the concave surface side and the convex
surface side of the diaphragm unless considering the reduction in size in a plane.
[0016]
Further, in the speaker according to the present invention, when the driver unit is mounted on
the concave side of the diaphragm, it is preferable that the driver unit be mounted so as to be
accommodated in an arcuate region formed by the diaphragm.
[0017]
Further, in the speaker according to the present invention, the driver unit can be attached
regardless of the position or the number on one surface of the diaphragm.
In other words, depending on the shape and size of the diaphragm, for example, one attached to
the central part of the diaphragm, or one attached to any location other than the central part of
the diaphragm, A plurality of diaphragms may be attached including the central portion of the
diaphragm, and a plurality of diaphragms may be attached to any place other than the central
portion of the diaphragm.
[0018]
Further, in the speaker according to the present invention, the driver unit in the speaker
according to the present invention has no problem with either a moving coil type actuator or a
moving magnet type actuator, but considering the sound pressure on the high frequency side, a
moving coil type actuator is provided. Then it is desirable.
12-04-2019
5
[0019]
Further, in the speaker according to the present invention, it is preferable that the frame has a
side surface having a width equal to or more than a stroke at which the diaphragm vibrates.
[0020]
Further, in the loudspeaker according to the present invention, it is desirable that the side end of
the diaphragm is bent toward the frame side.
[0021]
Furthermore, in the speaker according to the present invention, it is preferable that the edge
member is more flexible than the diaphragm. For example, the edge portion may be formed of a
material more flexible than the diaphragm, or the same material as the diaphragm. It may be
formed thinner than the diaphragm.
[0022]
In the loudspeaker according to the present invention, one end side and the other end side in the
bending direction of the diaphragm curved in one direction are attached to the frame through the
edge portion which does not disturb the vibration.
Therefore, without suppressing the vibration of the curved diaphragm, the kinetic energy
converted from the electric energy of the audio signal can be efficiently transmitted to the
diaphragm, and the sound can be louder and clearer. Become.
[0023]
Further, in the loudspeaker according to the present invention, the driver unit is fixedly attached
to the frame.
Therefore, there is no possibility that the installation of the drive unit becomes stable, the kinetic
energy transmitted to the diaphragm side is reduced (cancelled) by the reaction of the drive unit,
and the generated kinetic energy can be sufficiently transmitted to the diaphragm side It has
become.
12-04-2019
6
[0024]
Furthermore, in the loudspeaker according to the present invention, the driver unit is attached in
contact with one surface of the diaphragm.
Therefore, it is possible to thin and miniaturize the structure, improve the space factor, and
reduce the weight, and it can be easily manufactured.
[0025]
Therefore, the kinetic energy converted from the electrical energy of the audio signal is
efficiently transmitted to the diaphragm, and both the deaf and the healthy can both hear without
inconvenience by louder and clearer sound emission, and even in the distance It is possible to
provide a compact and lightweight speaker that can be clearly heard.
[0026]
It is a front side perspective view showing the 1st speaker concerning the present invention.
It is a front view showing a first speaker concerning the present invention.
It is a left side view showing the first speaker concerning the present invention.
FIG. 3 is a cross-sectional view taken along the line A-A (front center side) shown in FIG.
It is an expanded view explaining the structure of the first speaker concerning the present
invention.
It is a partial enlargement front center cross-sectional view which shows the method of attaching
a voice coil (coil bobbin). It is a partial enlarged front center cross-sectional view which shows
12-04-2019
7
the other method of attaching a voice coil (coil bobbin). It is a partial enlarged front center crosssectional view which shows the other method of attaching a voice coil (coil bobbin). It is a partial
enlarged front center cross-sectional view which shows the other method of attaching a voice coil
(coil bobbin). It is a partial enlarged front center cross-sectional view which shows the other
method of attaching a voice coil (coil bobbin). It is a partial enlarged front center cross-sectional
view which shows the other method of attaching a voice coil (coil bobbin). It is a back side
perspective view showing the 2nd speaker concerning the present invention. It is a front center
cross-sectional view of the 2nd speaker concerning the present invention. It is a front side
perspective view which shows the curved diaphragm used for the 2nd speaker which concerns
on this invention. It is a bottom view showing the curved diaphragm used for the 2nd speaker
concerning the present invention. It is a front side perspective view showing the 3rd speaker
concerning the present invention. It is a rear side perspective view showing a curved diaphragm
and a frame used for the third speaker according to the present invention. It is a rear view
showing the 3rd speaker concerning the present invention. FIG. 6 is a left side view showing a
third speaker according to the present invention. FIG. 5 is a front central cross-sectional view of a
third speaker according to the present invention. It is a front view showing the state where a
plurality of speakers concerning the present invention were combined. It is a front view showing
another state which combined a plurality of speakers concerning the present invention. It is a
front view showing another state which combined a plurality of speakers concerning the present
invention.
[0027]
Next, an example of the embodiment of the present invention will be described. The
embodiments described below are technically variously limited because they are preferable
specific examples of the present invention, but the scope of the present invention is described to
be particularly limited in the following description. As long as it does not exist, it is not limited to
these forms.
[0028]
First Embodiment As shown in FIG. 1 to FIG. 5, the speaker 10 of the present invention is an
acoustic apparatus that can hear both barrier-free and voice-free without distinguishing between
a hearing impaired person and a hearing person. , "Barrier-free speaker". ), And comprises at least
a diaphragm 1, a driver unit 2 and a frame 3 that can be heard by both a deaf and a hearing
person.
12-04-2019
8
[0029]
The diaphragm 1 is a flat thin member such as a film or sheet, and forms a curved surface
portion which curves in one direction from the one end 1a side to the opposite end 1c side, and
the one end 1a side and the other end The side 1 c is arranged to be held by the frame 3 through
the edge portion 15.
[0030]
The diaphragm 1 is preferably substantially rectangular in plan view from one side (concave or
convex side), but the present invention is not limited to this. For example, it may be elliptical,
polygonal, or wedge shape in the same plan view. Good.
Furthermore, the diaphragm 1 refers to one that is formed so as to have a curved surface portion
that curves in advance, or that can have a flexible and curved surface portion that is curved while
having tension.
[0031]
The diaphragm 1 is attached to the frame 3 so that the curved convex surface faces the front in
the case of a member molded to have a curved portion which curves in advance, and in the case
of a member having flexibility, it stands up It is attached to the driver unit 2 in a flat plate state,
and is curved and deformed elastically from this state to form a curved surface, and the deformed
curved convex side or curved concave side is attached to the frame 3 with the front facing.
[0032]
This curved diaphragm (hereinafter referred to as "curved diaphragm").
The material of 1) is preferably lightweight, but if it is too lightweight, the sound pressure level of
medium and high tones may be too high compared to the bass. Specific examples of curved
diaphragm 1 materials include paper such as carbon paper, synthetic resin having flexibility such
as polyimide and polyester, carbon fiber reinforced plastic (CFRP), wood such as balsa, aluminum
and beryllium, A metal such as boron can be used. Further, the thickness of the curved
diaphragm 1 is not particularly limited as long as it can be shaped so as to have a curved surface
12-04-2019
9
portion that curves in advance, or can be elastically bent and deformed.
[0033]
Further, the edge portion 15 is an easily deformable suspension which elastically fixes the curved
diaphragm 1 to the frame 3, one end side edge portion is fixed to the curved diaphragm 1, and
the other end side edge portion is It is fixed to the frame 3. That is, the edge portion 15 has a
hardness and a shape that does not interfere with the vibration of the curved diaphragm 1, and is
provided with a damping effect that suppresses divided vibrations at the time of high frequency
output.
[0034]
Therefore, the one end 1a side and the other end 1c side of the curved diaphragm 1 are attached
to the frame 3 in a movable free state, for example, by the edge portion 15 having a corrugation
shape (cross section waveform) without being pressurized. It is good to be In FIG. 4, in the edge
portion 15, the center of the cross section is curved in an arc shape, and the curved convex
portion is illustrated as facing the back side (downward in the figure).
[0035]
It is desirable that such an edge portion 15 be a material that is robust and more flexible than the
curved diaphragm 1 so as not to prevent the vibration of the curved diaphragm 1 as described
above, for example, rubber or urethane (synthetic Any resin may be used, as long as it can be in
the form of a thin sheet suitable for design purposes.
[0036]
Specifically, when the rubber edge is used, since the stretchability and the amplitude
characteristic are excellent, the sense of distortion is extremely reduced, and the damping effect
is considerably high.
In addition, the rubber edge is easy to put out the bass, it can be a soft sound so loose. The
urethane edge is light in weight due to the foam material, but has a proper damping effect so that
12-04-2019
10
it is possible to make it easy to balance the sound. The cloth edge is the most durable,
lightweight, and relatively inexpensive material.
[0037]
The curved diaphragm 1 is thus supported by the frame 3 so as to vibrate freely by the edge
portion 15, so that the vibration energy of the curved diaphragm 1 is difficult to be transmitted
to the frame 3 and energy loss is reduced. ing.
[0038]
In the present invention, the edge portion 15 may constitute a part of the curved diaphragm 1.
That is, the same members as the curved diaphragm 1 and separately formed thin edge portions
15 may be combined, or the edge portions 15 may be integrally formed thinner than the curved
diaphragm 1. As described above, when the curved diaphragm 1 and the edge portion 15 are
formed by the same member, it is possible to obtain a barrier-free speaker whose manufacturing
process is saved while suppressing the cost of the member.
[0039]
The driver unit 2 is an actuator that vibrates the bending diaphragm 1 in accordance with the
input (energized) electric signal (sound signal), and is attached in contact with one surface of the
bending diaphragm 1. That is, the driver unit 2 is attached to vibrate the curved surface of the
curved diaphragm 1.
[0040]
The driver unit 2 is fixed to the frame 3 and attached. That is, although the driver unit 2 receives
a reaction at the time of driving, by fixing the driver unit 2 in contact with the frame 3, the
bending diaphragm 1 is vibrated by the driving and reaction of the driver unit 2, and the outside
Sound pressure can be increased.
12-04-2019
11
[0041]
Here, in order to generate a large volume, a large diaphragm and a large power are required, but
it can also be achieved by applying a larger force (vibration) to the curved diaphragm 1 than the
driver unit 2. it can. As such a driver unit 2, for example, a moving coil type actuator can be
mentioned.
[0042]
That is, in the present embodiment, in order to realize a phenomenon in which a shear wave is
generated from the curved surface portion of the curved diaphragm 1, the moving coil type
actuator 2 reproduces sound. The moving coil type actuator 2 is advantageous in design in that
the stroke when driving the curved diaphragm 1 is large and a wide frequency band (tone range)
can be obtained.
[0043]
Such a moving coil type actuator 2 is composed of a voice coil 21 and a magnetic circuit 22, and
the voice coil 21 is inserted and arranged in a magnetic gap formed by the magnetic circuit 22.
Then, an electric signal or the like is applied to the voice coil 21 to cause a vibration according to
the applied signal, and the vibration is transmitted to the curved diaphragm 1 connected to the
voice coil 21 for driving. That is, since one end of the voice coil 21 is accommodated in the
magnetic circuit (magnetic field) 22 and the other end is directly connected to the curved
diaphragm 1, the input electric signal moves the voice coil 21 and the movement thereof Are
transmitted to the curved diaphragm 1 and converted into acoustic energy (sound). A magnetic
fluid is injected into the magnetic gap to maintain the center of the voice coil 21 in the magnetic
gap.
[0044]
The voice coil 21 is configured by winding a coil wire of a desired diameter with a desired
number of turns around the outer peripheral end of a cylindrical coil bobbin. The voice coil 21
has, for example, a flat portion 12 for voice coil attachment having a predetermined dimension
larger than at least the outer periphery of the coil bobbin at substantially the center of the curved
12-04-2019
12
diaphragm 1, and after applying an adhesive to the tip of the coil bobbin By arranging this on the
concave side of the flat portion 12, connection and fixing can be performed.
[0045]
In the present embodiment, the flat portion 12 having a predetermined dimension is provided
and attached substantially at the center of the curved diaphragm 1 because of the ease of
attaching the voice coil 21 to the curved diaphragm 1. It does not limit, and it does not matter at
all even as what is attached to the concave side of the curved diaphragm 1 as it is. Of course, only
the substantially central portion on the concave side of the curved diaphragm 1 may be attached
as a flat one.
[0046]
Further, in the present invention, as shown in FIG. 6 to FIG. 11, a convex portion or a concave
portion can be freely found at the attachment portion of the voice coil 21 in the curved
diaphragm 1, and the convex portion or the concave portion can be a positioning guide of the
voice coil 21. The degree of freedom of design can be obtained. That is, as shown in FIG. 6, for
example, as shown in FIG. 6, the thin concave stepped portion 51 having a predetermined size
larger than the outer periphery of the coil bobbin is provided substantially at the center of the
curved diaphragm 1 and attached. As shown in FIG. 7, a concave groove 52 substantially equal to
the shape and size of the coil bobbin is provided and attached substantially in the center of the
curved diaphragm 1, or as shown in FIG. A thick convex step 53 which is housed in the voice coil
and shaped and sized to contact the inner peripheral surface of the coil bobbin, or is attached as
shown in FIG. The coil bobbin is accommodated in the inside of the voice coil substantially at the
center of 1 and has a shape and size in contact with the inner circumferential surface of the coil
bobbin, or is disposed outside the voice coil, and is a coil bobbin It may be attached to the convex
rib portion 54 in which the above shape and size in contact with the outer peripheral surface is
provided.
[0047]
Further, a thick convex step portion or a convex rib portion disposed inside the coil bobbin may
be combined with a convex rib portion disposed outside the coil bobbin. That is, a thick convex
stepped portion as shown in FIG. 8 arranged to be in contact with the inner peripheral surface of
12-04-2019
13
the coil bobbin and a convex rib as shown in FIG. 9 arranged to be in contact with the outer
peripheral surface of the coil bobbin Provided or attached, or as shown in FIG. 10, a convex rib
portion 54u arranged to be in contact with the inner peripheral surface of the coil bobbin and a
convex rib arranged to be in contact with the outer peripheral surface of the coil bobbin The
portion 54s may be used in combination, and the tip end portion of the coil bobbin may be
inserted and sandwiched therebetween.
[0048]
The overall shape of the thick and convex step portion 53 and the convex rib portion 54 is not
particularly limited, and, for example, it may be any shape such as a 〇 shape in plan view, a
polygonal shape such as a triangular shape or a square shape, a star shape, or a heart shape. It
may be a shape. Further, in the case of the convex rib portion, even if it is a linear wall-like body
or a radial wall-like body extending from one point to the periphery (or conversely, converging
from the periphery to the center), It may be a frame. Furthermore, although not shown, these
thick and convex steps and convex ribs may be formed of a plurality of convex pins.
[0049]
Although such a thick convex step portion 53, convex rib portion 54, and convex pin body
increase the weight of the curved diaphragm 1, the voice coil 21 to the curved diaphragm 1 is
used instead. As well as functioning as a guide when mounting, it has the advantage of
reinforcing the curved diaphragm 1 so as not to be damaged or deformed.
[0050]
Note that these thick and convex step portions 53, the convex rib portions 54, and the convex
pin bodies may be formed integrally with the curved diaphragm 1, or may be separately formed
as shown in FIG. May be attached to the curved diaphragm 1.
Further, the attachment of the voice coil 21 to the curved diaphragm 1 using the convex portion
and the concave portion is not limited to the present embodiment, and can be similarly adopted
in other embodiments described later.
[0051]
12-04-2019
14
Furthermore, in the present invention, the voice coil 21 is provided with a neck portion which is
a hole having a predetermined dimension at a substantially central portion of the curved
diaphragm 1, and an adhesive is applied to the outer periphery of the coil bobbin tip and inserted
into the neck portion. Connection can be fixed. In addition, in the case of the structure which
attaches the voice coil 21 to a neck part, since the top part side of the voice coil 21 will be in a
release state, it will be closed by a cover body.
[0052]
The magnetic circuit 22 has a shape corresponding to driving of the voice coil 21 and has a
cylindrical permanent magnet 23 and a yoke made of iron material which is a good magnetic
material for accommodating the permanent magnet 23 therein. (Hereafter, it is called "Sakai
Yoke". 24) This is an internal magnetic type magnetic circuit which is arranged on the upper part
of the permanent magnet 23 so as to cover the weir yoke 24 and is also composed of a plate 25
of a disc made of iron material and the like. A neodymium magnet, an alnico magnet, or a ferrite
magnet can be used as the permanent magnet 23. However, it is preferable to use a neodymium
magnet, an alnico magnet, or the like because a stronger magnetic field can be obtained as
compared to the ferrite magnet. Note that it is also possible to use a moving magnet type
actuator having an external magnetic type magnetic circuit using a ring-shaped ferrite magnet or
the like as the driver unit 2.
[0053]
In the magnetic gap, the plate 25 is disposed and mounted on the upper surface of the cylindrical
neodymium magnet 23, and from the lower surface of the neodymium magnet 23, the outer
peripheral upper end of the yoke 24 is cut to a predetermined size diameter. It is formed. That is,
since the outer diameter of the plate 25 is mounted in alignment with the inner diameter of the
yoke 24, the ring shape having a predetermined width dimension between the inner diameter
surface of the yoke 24 and the outer diameter surface of the plate 25 Gap, ie, a gap.
[0054]
Also, the dimension in the depth direction of the magnetic gap is determined by the thickness of
12-04-2019
15
the plate 25 and the inner diameter thickness dimension of the yoke 24. Therefore, since the
magnetism of the neodymium magnet 23 is guided to the gap by the yoke 24 and the plate 25
and converged, a magnetic flux is generated in the gap and the magnetic gap is formed.
[0055]
In the present embodiment, a suspension member called a damper disposed on the outer
peripheral portion of the voice coil bobbin is not used in the common speaker unit. That is, the
speaker unit in the present embodiment has a so-called damper-less structure, and the curved
diaphragm 1, and the edge portion 15 disposed on the one end 1a side and the other end 1c side
of the curved diaphragm 1 as a suspension member. The voice coil 21 is supported. However,
according to the present invention, the present invention is not limited to this, and even if a
conventional general damper is provided on the magnetic circuit 22 side or the frame 3 side
according to the purpose, it does not matter. Reference numeral 26 shown in FIG. 4 denotes an
input terminal plug.
[0056]
Here, examples of the electrical signal input to the driver unit 2 include an audio signal output
from a television, a radio, an audio player, a personal computer, a smart device such as a
smartphone or a tablet, or the like.
[0057]
In FIGS. 1 to 5, only one driver unit 2 is attached to the central portion on the concave side of the
curved diaphragm 1.
As a result, it is possible to make the barrier-free speaker 10 thinner and smaller, smaller in
structure, and improved in space factor. In addition, since the central portion of the curved
diaphragm 1 is efficiently driven, the sound volume can be higher and the sound can be emitted
clearly.
[0058]
12-04-2019
16
Further, in FIGS. 1 to 5, the driver unit 2 is shown as being attached so as to be accommodated in
an arcuate region formed by the curved diaphragm 1. That is, when the curved surface of the
curved diaphragm 1 is an arc and a straight line connecting the one end 1a side and the other
end 1c side of the curved diaphragm 1 by the shortest distance is a chord, a region surrounded
by the arc and the chord It is desirable to be attached so as to be accommodated inside. As a
result, the driver unit 2 does not protrude from the back (concave) side of the curved diaphragm
1, and it is possible to make the barrier-free speaker 10 thinner and smaller and structurally
smaller with an improved space factor.
[0059]
The frame 3 holds the curved diaphragm 1 and the driver unit 2 and, as shown in FIG. 1 and FIG.
4, is curved in an arc shape with a pair of linear diaphragm attachment portions 31 and 31. A
pair of connecting portions 32 and 32 and a drive unit mounting portion 33 are provided. The
drive unit attachment portion 33 is provided on the concave portion side of the connection
portion 32. Moreover, the frame 3 forms the outline of the circumference | surroundings of the
curved diaphragm 1 with a pair of diaphragm attaching part 31,31 and a pair of connection parts
32,32.
[0060]
As described above, the diaphragm attachment portions 31 are provided in a pair so as to
support the one end 1a side and the other end 1c side of the curved diaphragm 1, respectively.
The connecting portions 32 are provided opposite to each other so as to integrally hold the pair
of diaphragm attachment portions 31 and the drive unit attachment portion 33. The drive unit
attachment portion 33 is provided so as to be located between the pair of diaphragm attachment
portions 31 and 31 integrated by the connecting portion 32 so that the drive unit 2 is attached
to one surface of the curved diaphragm 1.
[0061]
Here, in the curved diaphragm 1, the side ends 1b and 1d along the bending direction are not in
contact with the frame 3 and have a gap between them and the inner surface of the pair of
connecting portions 32 and 32 in the frame 3. Is attached. That is, only the one end 1 a side and
the other end 1 c side of the curved diaphragm 1 are arranged to be held by the frame 3 through
12-04-2019
17
the edge portion 15. By providing a gap in this manner, while allowing fine amplitude movement
(vibration) of the curved diaphragm 1, a sound wave emitted to the back surface side by driving
the curved diaphragm 1 is formed on the surface side of the curved diaphragm 1. It is possible to
prevent the interference with the sound waves generated on the front side by coming around.
[0062]
Further, the frame 3 may be provided with a side surface having a width equal to or greater than
the stroke at which the curved diaphragm 1 vibrates. That is, it is desirable that the pair of
connecting portions 32 and 32 be wider in the direction in which the curved diaphragm 1
vibrates. In the present embodiment, it is preferable that the connecting portion 32 has a size of
at least 15 mm or more, for example, if the curved diaphragm 1 vibrates 7.5 mm in each side
direction (15 mm in reciprocation), for example. The design can be arbitrarily changed according
to the stroke of the vibrating diaphragm 1 vibrating.
[0063]
In FIG. 4, the direction in which the curved diaphragm 1 vibrates and the amount of movement
(stroke) are indicated by white arrows, and the pair of connecting portions 32 and 32 have a
width greater than the stroke in which the curved diaphragm 1 vibrates. It is shown as.
[0064]
By providing such a side surface, the sound waves emitted from the front surface (front surface)
of the curved diaphragm 1 and the sound waves emitted from the back surface (back surface) are
blocked by the side surface, and the interference attenuation of the sound waves on the front and
back surfaces does not occur further. It will be.
Therefore, stable sound pressure and wide frequency band characteristics can be obtained.
[0065]
Then, as shown in FIG. 5, the drive unit 2 is attached and fixed to the drive unit attachment
portion 33 of the frame 3 using the frame attachment plate 27 and the magnetic circuit retainer
28, and the voice coil 21 of the drive unit 2 is a curved diaphragm. The coil bobbin outer
peripheral portion is connected and fixed to the flat portion 12 provided in 1.
12-04-2019
18
[0066]
Although not shown, the barrier-free speaker of the present invention may have a plurality of
driver units 2 attached to one surface of the curved diaphragm 1.
In such a barrier-free speaker, by driving one surface of the same curved diaphragm 1 by a
plurality of driver units 2. Driving at 2 can generate larger shear waves and compression waves
from the curved diaphragm 1. Therefore, it can be expected that the sound volume is high and
the clear sound is emitted.
[0067]
Second Embodiment As shown in FIGS. 12 to 15, the barrier-free speaker 20 of the present
invention may use a curved diaphragm 11 whose peripheral portion is bent. That is, the present
embodiment is different from the first embodiment described above in the structure of the
curved diaphragm.
[0068]
In each embodiment described below, it explains focusing on a different part from barrier-free
speaker 10 concerning a first embodiment mentioned above. Therefore, the same components
are denoted by the same reference numerals and the description thereof is omitted, and unless
otherwise described, they are the same.
[0069]
The curved diaphragm 11 has a curved surface portion which curves in advance, and is integrally
formed so that one end 11a and the other end 1c, and the bent side end 16 where the side ends
1b and 1d are bent. 12 and 13 show a barrier-free speaker 20 attached to the frame 3 such that
the curved convex surface of the curved diaphragm 11 faces the front. Moreover, in FIG.14 and
FIG.15, the curved diaphragm 11 which has the bending side end part 16 which the side end 1b,
12-04-2019
19
1d part bent toward the curved concave side in a curved-surface part is shown.
[0070]
By thus bending the one end 11 a and the other end 1 c and the side ends 1 b and 1 d of the
curved diaphragm 11 to provide the bent side end 16, the strength of the curved diaphragm is
significantly increased and the shape is maintained It will be able to improve the ability. In
addition, it is possible to suppress the wrap around of the sound on the opposite side of the
curved diaphragm 11, and to improve the sound quality.
[0071]
Third Embodiment Further, as shown in FIGS. 16 to 20, in the barrier-free speaker 30 of the
present invention, the driver unit 2 may be mounted on the convex surface side of the curved
diaphragm 1. That is, this embodiment is different from the first embodiment described above in
the direction of the curved diaphragm and the structure of the frame.
[0072]
The curved diaphragm 1 has the same structure as that of the first embodiment, but the
mounting direction to the frame 13 is different, and the direction in which the side ends 1b and
1d of the curved diaphragm 1 are bent is different. . That is, the curved diaphragm 1 has the bent
side end 16 obtained by bending the side ends 1b and 1d toward the curved convex side in the
curved surface portion, and the frame 13 is directed such that the curved concave faces forward.
It is attached.
[0073]
The basic structure of the frame 13 is the same as that of the frame 3 in the first embodiment,
but is different in that the drive unit attachment portion 33 is provided on the convex portion
side of the connecting portion 32. Therefore, the driver unit 2 is mounted on the convex side of
the curved diaphragm 1.
12-04-2019
20
[0074]
As described above, the driver unit 2 is attached to the convex side of the curved diaphragm 1
and provided so that the concave side of the curved diaphragm 1 faces forward, like the barrierfree speaker 10 shown in the first embodiment. The effect that the kinetic energy converted from
the electrical energy of the audio signal can be efficiently transmitted to the curved diaphragm 1
without the vibration of the curved diaphragm 1 being suppressed, and the loud sound can be
louder and clearer In addition, the curved diaphragm 1 is extremely effective when it is not easy
to protrude from the attachment surface such as a ceiling or a wall surface.
[0075]
Fourth Embodiment In addition, since the barrier-free speaker of the present invention is
compact and lightweight, it may be used in combination.
That is, a plurality of barrier-free speakers can be connected in tandem, in parallel, back-to-back,
or in an annular shape. By combining a plurality of barrier-free speakers in this manner, the
sound spreads in the upper, lower, right, and left directions of the sound emission direction, the
sound pressure is increased, or non-directional sound is emitted in all directions. can do.
[0076]
FIG. 21 shows a composite barrier-free speaker 50 in which five barrier-free speakers 10 of the
present invention are vertically stacked and joined, and in FIG. 22, a composite barrier in which
two barrier-free speakers 10 of the present invention are connected back to back. A free speaker
60 is shown, and in FIG. 23, a composite barrier-free speaker 70 in which four barrier-free
speakers 10 of the present invention are annularly coupled is shown. The composite barrier-free
speakers shown in FIGS. 21 to 23 are merely examples, and the number and arrangement of the
combination can be arbitrarily determined.
[0077]
Further, although the barrier-free speaker 10 according to the first embodiment described above
is used in the composite barrier-free speaker shown in FIGS. 21 to 23, the barrier-free speaker
according to the second embodiment described above is not limited thereto. 20 or a composite
barrier-free speaker in which the barrier-free speaker 30 in the third embodiment described
12-04-2019
21
above is used.
[0078]
1, 11 Curved diaphragm, 1a one end, 1b, 1d side end, 1c other end, 2 driver unit, 3, 13 frame,
10, 20, 30 barrier free speaker, 12 flat portion, 15 edge portion, 16 bending side End, 21 voice
coil, 22 magnetic circuit, 23 magnet, 24 yoke, 25 plate, 26 input terminal plug, 27 frame
mounting plate, 28 magnetic circuit retainer, 31 diaphragm mounting portion, 32 connecting
portion, 33 drive unit mounting portion , 51 thin-walled concave step portion, 52 concaveshaped groove portion, 53 thick-walled convex step portion, 54 convex-shaped rib portion.
12-04-2019
22
Документ
Категория
Без категории
Просмотров
0
Размер файла
36 Кб
Теги
description, jp6326649
1/--страниц
Пожаловаться на содержимое документа