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JPS5312738

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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 JPS5312738
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a sound reproduction
assembly showing an alternative embodiment of the present invention. FIG. 2 is a front elevation
view of the frame of the device shown in FIG. 1 with the diaphragm removed. Figure 3 is a crosssectional view taken along line 3-3 of the device shown in Figure 1; FIG. 4 is a rear view of the
assembly shown in FIG. FIG. 5 is a cross-sectional view of a portion of the frame and diaphragm
taken along line 5-5 of FIG. 6 is a portion of the frame shown in FIG. 2 and line 6-6 of the
diaphragm. The enlarged sectional view taken out. FIG. Η is a cross-sectional view of a portion of
the frame shown in FIG. 6 taken along line 7-1 of the diaphragm. FIG. 8 is a cross-sectional view
of a two-voice coil body and a diaphragm as well as a preferred type of high-frequency
propagator carried. 2 ...... frame, 1B ...... diaphragm, 24 ...... sound □ voice coil body, 28 ......
magnet support ribs 32 ...... voice coil, 34 ...... permanent magnet, 36 ...... rear plate, 38 s ......
central pole piece, 40 ...... pole piece, 62 .... · · · Elastic insert, 70 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
vibration member.
Detailed Description of the Invention The present invention is a thin structure and a light meter,
which is not a widely varying temperature and humidity condition, and is an improved extension
that can withstand use in equipment and locations that cause such abnormal conditions. The
present invention relates to small devices and other sound reproduction devices. Simultaneous:
this, the structure of the diaphragm and its attachment are such that, for example, the echo in the
frequency range ranging from / I-0 to -20000 cps can be reproduced faithfully with minimal
distortion. The increased use and application of loudspeakers and sound reproduction devices
and the wide range of improvements in reproduction accuracy of stereo reproduction devices,
while meeting the acoustic standards, also Responding to thinnings requirements generated
demand for equipment that withstands unusual operating conditions such as extensive
temperature and severe humidity conditions per month · Some of this L cows have special
assembly-or This can be filled by 構, f f history Illt, or this J) paste, '1', or one or more obtained
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lengths (, the place is general: this, other important properties It is obtained when you For
example, it has been proposed to provide the sound reproduction device with a relatively thin flat
diaphragm instead of the more general conical type of expander. A representative patent that
proposed such a structure is US Patent No. 1/7 Zo g 3 g 1- 1--17 ≠ 乙-? How is the number 0number 0? No.-No., 20 ≠ 73 乙 July and 323 乙 95. Such diaphragms are generally made of
wood-sized or other relatively ugly lumber ← 1 and they are used as a robust reproduction of
low-frequency sound, ie as “bass loudspeaker (v + ocff = r ·)”. In general, musical tones and
squeaks are in the high range of peacock and music tones due to their weight and the power
required to move them, while having excellent merits Used in equipment designed for the life of a
rat: 'is unsuitable and therefore 17L in such a device, a separate cage mounted and operated to
reproduce a relatively wide range of acoustic frequencies It is necessary to provide a highfrequency device or “treble loudspeaker (tw + direct .theta.r) 11”. Furthermore, for example, if
the British patent No. 510 707 (3) bows to U.S. Pat. No. 1 g, 2 ≠ 6 ≠; No. 2903.2 乙 θ; 30 ≠ 乙
3 乙 2 It has been proposed to use a hard and light diaphragm made of spongy plastic on the
vessel. However, when made of such a rigid and lightweight diaphragm or substantially flat 11like, the central and peripheral parts of the diaphragm will vibrate at different frequencies, ie out
of phase with each other 11 flakes (br-ak-1) at the intermediate and high frequencies caused
have a pronounced tendency to occur, creating an intermediate node point and formation in the
diaphragm, resulting in distortion of the sound It is permitted to wake up.
In addition, in the case of a full-sound reproduction device manufactured in the future, the
physical and acoustic characteristics of the diaphragm, and the characteristics of the frame and
members for mounting the electromagnetic member related to the diaphragm and the voice coil
There was a marked disagreement or with it. As a result, parts of the frame or the like may cause
their own vibrations separately from the diaphragm and voice coil while the device is in
operation. Thus, the elements of the loudspeaker system are interference-shooting feet (ge)
banked, which degrades the frequency response, and tends to suffer from noise, noise and
parasitic noise, and playback quality. The present invention reduces or eliminates the defects or
limitations of the prior art expander assembly described above, and provides a thin, lightweight
sound reproduction device that can be used under widely varying adverse operating conditions.
The sound quality of the to-be-reproduced tone is substantially improved, and the chorus and the
reproduction apparatus which can maintain good sound quality over a wide frequency range
ranging from ≠ 0 to 20000 cps or more. It is provided. Hereinafter, the present invention will be
described in more detail with reference to the preferred embodiment 1 of the present invention
shown in the drawings. In the embodiment of the invention selected for the purpose of
illustration in the attached drawing, the echo regenerator has a flat frame 2 which is rectangular
as shown: g1, side members, weirs, and / or θ is provided. Diaphragm support shelf //, which
project inward to the inner edge of the frame member Itli! 1 and 2. Each shelf / /, 2 faces the
front face (j) / ridge of the frame shown in FIG. 1 / in one common plane, as shown in FIGS. A
thin, flat, rigid and light diaphragm 78 'is supported on the shelf /, 2 and is surrounded by a
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shoulder 20, of height approximately equal to the thickness of the diaphragm. Slope, 2 feet or
shoulders! As shown in FIGS. 3, 5 and 6, which extend outward from the top edge of the frame 0
at the front face / edge 1 of the frame and which extends outwardly around the diaphragm /
which edge. Thus the frame 2 has an outer edge or flange // 3, the flange / 3 being received in a
support with grooved or other mounting means, the assembly being of a suitable mounting
device (not shown) It is fixed to the appropriate attachment. 11. The device is covered with a
material or decoration material through which the reproduction sound can penetrate without
distortion or through the fabric or fabric force ..-- or any other suitable material thereof ceilings,
furniture, furniture May be used as an element or as a panel at any other desired location. The
tubular voice coil body, 2 ≠, is fixed adjacent to its center on a flat diaphragm /, and as shown in
FIG.
Protruding towards the eyebrow-Magnet support rib-2g has its both ends 11] 11 member
eyebrows and what frame! , Fixed on both sides, carrying magnet assembly 30, coil body ,,! Voice
coil mounted on top of it? Provide an air cap 3 / surrounding the. The frame and the magnet
support rib, 2g 'can be made of any suitable material, but for many purposes, the frame and
diaphragm are made of the same or similar material with acoustical properties. It is better to use
it. Therefore, the frame! , Diaphragm / with, magnet support rib ,? To make sure, spongy foam
plastic material such as solid polystyrene foam is made of plastic material for other acoustic
devices. Such an acoustic device facing material can be used to make the frame 2 and the support
rib, 2g as an integrated single-piece molded body. This molded body is substantially rigid and V
+, for example, made by injection molding, and about 00 g to 10.0 pounds per cubic foot (about
367 to 3 kg) 1 Composed of non-expandable (7) plastic material with a density at The diaphragm
/, on the other hand, is of similar nature or is made of a solid, lightweight plastic material in the
form of an expanded or foamy sponge. A typical composition employed to form the diaphragm is
expanded polystyrene, which is about 0. s. Per cubic foot. It is good to have a density of about 1
to 3 pounds (about 367 to g, 23y). The density of the material used to form the frame and the
magnet support ribs may be somewhat greater than the material used to form the diaphragm,
and in some cases, as mentioned above, it may be non-spongy or otherwise Whether molded
from a substantially rigid material, a material that is sufficiently similar or compatible with the
material for forming the diaphragm is adopted for the frame and magnet support rib molding,
and it is the main element of the entire assembly? When placed under conditions of widely
varying temperature, humidity, etc., the calls themselves tend to cause vibrations that interfere
with each other or to undergo substantial (different changes) It is highly desirable to minimize.
The magnet support rib-2g 'is a frame at the back or opposite face of the frame 2 and adjacent to
the 2nd frame! And are spaced from and extend parallel to the diaphragm / g as shown in FIG.
The magnet assembly 30 is a magnet support rib 2I? It is fixed to and thereby held in a fixed
position. Further, as shown in FIG. 3, the magnet assembly 30 is formed at an appropriate
position in the support rib 2g, and the voice coil on the diaphragm 7g-?
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The assembly 30 is preferably made of a magnetic material such as "Flunic 11" or a ceramic
material such as 1 "Indox", so as to surround the voice coil 3-2 which carries a little. Permanent
magnet Ei3'l. The three magnets are provided with a rear plate 3 'and a central pole piece 3, both
of which are made of ferromagnetic material. The front plate or pole piece 0 is also made of
ferromagnetic material and contacts the permanent magnet 3. Central opening of pole piece 0! Is
a voice coil body! Surround the voice coil 32 on the heel. Central opening of pole piece 0! The
side of the frame is separated from the central pole piece 3g to provide an air gap 3 / of limited
cross section within which the voice coil 32 of the diaphragm is placed as shown in FIG. In
accordance with the invention, the diaphragm / is preferably made of a solid, lightweight
expanded polystyrene or other sponge-like plastic material as described above, and in most cases
the size and type of the actual sound reproduction device Thus, it has a thickness of about /// 乙
to /, 2 inches (about 7 L). In addition, to allow the device to emit a wide range of sounds varying
from up to 20000 cps, for example, from ≠ θ, an undesirable "break-up" during its oscillations
in the diaphragm. Or, it is preferable to construct and attach the diaphragm in a new way that
helps to reduce or eliminate the tendency to make nodal lines, zones or points. For this purpose,
it is preferable to provide the diaphragm / f with a compliance ring, a wire or a fold, which is
arranged between the centrally arranged voice coil body 32 and the periphery or edge / edge of
the diaphragm. In addition, frame the edge / edge of the diaphragm to be used as a soundproducing piston that can reproduce the tone or vibration in the entire diaphragm or in the
lowest audible or audible subrange! It is advisable to fix it on the support shelf / no. (10) As
shown, a sufficient clearance is provided between the outer edge of the diaphragm / the outer
edge of the weir and the peripheral shoulder of the frame, 20, and the restraint by the shoulder
is on the edge of the vibrator As the diaphragm flexes without being added :, the above
advantages are achieved. In addition, the end portion of the diaphragm / the frame portion of the
frame /-? The means or device employed to secure it to the wall may be of a fraying or bending
nature. For this purpose it has been found that an adhesive such as silicone rubber, or other
strong but curved cement lI-gutter is particularly suitable.
The compliance rings, lines, or folds formed on the diaphragm / s are arranged at various
intervals. As shown, in some constructions, concentric grooves are provided on the front or outer
surface of the diaphragm / with the compliance means in the form of 50 and I2 and the grooves
jO and j-2 are radially spaced apart It has been found to be advantageous to provide a large
number of grooves with different diameters on the rear face of the diaphragm for placement. As
shown in FIG. 3, the diaphragm / any backward groove 3 & 5 and 5 is close to the one or smaller
diameter groove jO in the front (//) of the diaphragm and on the opposite side of it. In contrast,
the grooves j♂ and 60 on the rear face of the diaphragm are likewise arranged close to the
larger diameter grooves 5.2 on the front face of the diaphragm in the opposite direction l i l. In
practice, the inner groove 0 and the diaphragm / relevant related groove 311-and 3 乙 are
somewhat wider than the outer 11 111 groove j and its associated groove j 60. The depth of the
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grooves 30 and j, 2 in the front of the diaphragm is also slightly shallower than the depth of the
grooves in the rear of the diaphragm. However, the dimensional characteristics of the groove and
its diameter can be varied as desired. But inside the 11 groove jO voice coil body ,,? It is generally
preferred to surround an area equal to or greater than about jO% of the total area of the
diaphragm / f, spaced radially apart. By placing a force compliance groove, the diaphragm can
respond to a fairly wide range of frequencies or changing voices, and faithfully reproduce it, so
that nodal or interference or out of phase vibrations are The tendency to occur in different parts
of the diaphragm is substantially reduced. However, the diaphragm thus provided with the
confluence groove loses the characteristics of the unity (-') as a device, resulting in a substantially
non-bonded band, whereby the low frequency vibration is faithful. Tend to be regenerated or
have a tendency to strain. Therefore, according to the present invention, it is desirable to insert in
the groove jO in the front face of the diaphragm and into the trough as indicated at 62, a flexible
resilient coin such as a ricone rubber material. This material serves to limit, to some extent,
between the zones of the diaphragm on either side of the compliance groove. If desired, a similar
flexible or elastic material may be inserted into the back groove of the diaphragm. Such an elastic
or flexible material thus acts as a filter, or as a connecting means connecting adjacent zones of
the diaphragm, thereby causing an undesirable or excessive break amplifier of each zone or
element of the diaphragm. And, unique movement completely away from others is excluded.
The result is a more uniform and accurate response of the entire diaphragm during low
frequency vibrations. For example, when the flexible connection insert 乙 2 in the compliance
grooves 0 and 32 on the front surface of the moving plate is removed, it is confirmed that the
response loss actually occurs in the range of about g00 Cps (/ 3) ing. In contrast, a much more
uniform response is obtained when the limiting connection is provided according to the
invention. It has further been found that the piston action of the entire diaphragm is improved
and strain reduced by providing a free release means or notch zone at the edge / edge adjacent
portions of the diaphragm. For this purpose, as shown in FIG. 1, FIG. 1 and FIG. 7, the frame 20
side members 乙, 乙 and 10 and the diaphragm support shelf / 2 of 10 are 9 ≠ and 3 in FIG. Of
the shelf as shown in 9 ≠, 7 ≠, 9g1100 It is notched or shaped to be lower than the rest of the.
In any case, a small Ponona point of the relatively less flexible adhesive material can be provided
in the central part of the free zone, as shown by 1 or (FIG. 7). In this way the diaphragm / edge
part / edge adjacent to the central part of any edge prevents the edge of the diaphragm from
rubbing the adjacent shoulders of the frame, even a little, 20 or even preventing distortion It is
characterized by having a limited freedom of movement to act. In addition, these adhesive
materials serve to stabilize the position of the entire diaphragm relative to the frame by
minimizing the cold flow phenomenon of the adhesive cement. As shown in FIG. 6, the escape
means or missing free band, C, C? g and 100 also provide an escape path for air on the periphery
of the diaphragm edge shown at 9j in FIG. 2 and opposite to the material / θ no posona shown
at arrow 7 in FIG. These air relief passages reduce the damping effect of the air adjacent to the
edge of the diaphragm during oscillation of the imaging plate, increase freedom of movement of
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the entire diaphragm in response to low frequency oscillations and the piston of the entire
diaphragm It acts to direct the effect. Diaphragm / g and voice coil, to further extend the
playback range and fidelity of the sound playback device implementing the present invention,?
The basket is provided with means of high frequency propagation ○ For this purpose, a tubeshaped voice coil body, two baskets are made of plastic snack coated paper, light metal like
aluminum or other suitable metal , Fixed in place in the center of the diaphragm, precisely
molded, glued, or otherwise affixed (/ 3) to the diaphragm.
The diaphragm part surrounding the voice coil body inclines inward and downward as shown by
6 、 and exerts a trumpet effect spreading outward, and at the same time, the front end part 乙 g
of the voice coil body can project to the front of the adjacent part of the diaphragm Let's do it.
The high frequency propagator is generally indicated at 70 and, as shown, the voice coil body, a
convex edge 7g bonded or otherwise fixed to the projecting end of the 2g. 7. the member
comprising the member 72 to be provided ? A recess 7 'is provided at the center of the frame 7
and is surrounded by the vibrating member 7. The vibrating member 7 is in the form of a
separate thin metal ring with an inwardly beveled attached rim and a rim attached to or
otherwise fixed to the convex inner edge of the member 7.2 . The outwardly free end g of the
vibrating member 7g is inclined towards the diaphragm / surface to which it is inclined and
extends above or away from the adjacent trumpet 18i]. In this way, the high frequency
propagator is operated directly and reliably by the voice coil body in response to the damped
one-sided vibration induced by the voice coil-the magnet assembly, whereby the frequency in
high-pitched sound reproduction The (/ 乙) number response is substantially improved. At the
same time, the high frequency propagator moves with and to some degree with the low
frequency oscillations in the middle or band of the diaphragm. In this way, the high frequency
propagator and the diaphragm / which action are coupled and correlated without introducing
distortion or causing interference therebetween, and also the vibratory free edge of the prop The
conical surface wedge of the diaphragm directly adjacent to the ridge is generated by the piston
action of the diaphragm and serves to direct the vibration as a whole to the front of the
character, including the dovetail wavenumber vibration. As a result, the entire spectrum of
frequencies from the lowest to the highest can be reproduced more faithfully by the joining of
the various component elements, and the amplitude of the piston movement required can be
minimized, so that the electrical distortion and the mechanical Both target losses are
substantially reduced, and increased electromagnetic efficiency is obtained, despite the unusually
wide range of frequencies and responses during device operation. The above structure may be a
sound reproducing device showing an exemplary embodiment of the present invention, or may
be rooted or oval, made in various ways (/ 7), other or special applications It will be apparent
that the present invention will be adapted to a thin and light device with. As such, it should be
understood that the specific devices shown and described in the accompanying drawings are for
illustrative purposes only and are not intended to limit the scope of the present invention.
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