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JPS5753198

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DESCRIPTION JPS5753198
Description 1, title of the invention
Ring speaker
3. Detailed Description of the Invention The present invention relates to a so-called ring-shaped
speaker having two diaphragms of an inner peripheral side diaphragm and an outer peripheral
side diaphragm. The inner diaphragm c (hereinafter referred to as the inner diaphragm) and the
outer diaphragm (hereinafter referred to as the outer diaphragm), which are formed in a ring
shape, are disposed in a V-shaped cross section. In the case of a ring-shaped speaker in which a
drive portion is connected to the top of the v-shape, the two diaphragms are each formed by
making a flat member made of paper or metal into a ring shape. However, in the case of upper
Ne configuration,? When an audio signal is supplied to the chair coil and the bobbin vibrates,
concentrated stress is applied to the neck portion of both diaphragms, that is, the fixing portion
between the bobbin and the inner diaphragm and the outer diaphragm, It can not follow and
vibrate. Therefore, with the conventional speaker as described above, the high frequency
component of the audio signal can not be reproduced sufficiently, and the frequency band of the
reproduced sound is narrowed. The present invention has been made to address the abovementioned circumstances, and at least one of the inner diaphragm and the outer diaphragm is
internally curved from one end to the other in the width direction to bend the speaker forward or
backward. It is possible to provide a ring-shaped speaker capable of dispersing the concentrated
stress applied to the fixing portion between the bobbin and the inner diaphragm and the outer
diaphragm by forming as described above and broadening the frequency band of reproduced
sound. EndPage: Purpose. Hereinafter, an embodiment of the present invention will be described
in detail with reference to the drawings. FIG. 1 (a) is a schematic perspective view showing an
example of a speaker having an inner diaphragm and an outer diaphragm, and the same figure
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(伽) is the same figure (()) cut along the illustrated line L, -t, It is a schematic sectional view. In
FIG. 1 (,), (b), for example, a squawker is shown as a speaker. In FIGS. 1 (a) and 1 (b), 11 is a
grate, 12 is a frame, 13 is an equalizer, 14 is an inner diaphragm, 15 is an outer diaphragm, and
a 16 support. Further, in FIG. 1 (b), 17 is a pole piece, 18 is a permanent magnet, 19 is a top
plate, 20I / 'i Devin, 21 is a voice coil wound around this bobbin 20 and supplied with an audio
signal. , 22 Fi? Danno or 23 resiliently supporting the pin 20 is a signal transmission line. 2 is an
enlarged view of only one side of the center 11Ls of FIG. 1). As illustrated, the inner diaphragm
14 positioned on the center side of the pin 20 has one end in the width direction, for example, in
front of the speaker of the Hobin 2 o, an arrow X!
When it is fixed to the end of the direction and located on the central axis side of the other end Fi
& pin 20 in the width direction, it is fixed to the end of the support 16 in the direction of the
arrow X1. One end of the outer diaphragm 15 positioned on the outer peripheral side of the mat
and the hovin 20 is also fixed at one end in the width direction of the bin 20, for example, at the
end in the direction of the arrow X1. ! It is fixed to the direction end inner periphery. The
diaphragm 14.15 is disposed such that its cross section is in the form of an arrow X shown in
FIG. Further, a portion including the hovin 20, the discoil 21, the dan / mother 23 and the like is
a drive part of the diaphragm 14.15. In such a configuration, by supplying an audio signal to the
voice coil 21, the bobbin 20 vibrates in the direction of the arrows X and 4- + X in the front and
rear of the speaker, that is, the illustrated arrows X and 4- + X. Vibrate. Next, it will be clarified
about the feature of the present invention. That is, the inner diaphragm 14 is curved in a circular
arc, for example, in the front of the speaker, that is, in the direction of the arrow X1 as it goes
from one end to the other end in the width direction. According to such a configuration, is it?
Even if concentrated stress is applied to the fixed portion between the bobbin 20 and the inner
diaphragm 14 and the outer diaphragm 15, that is, the portion shown by the broken line M in
FIG. Since the plate 14 is formed to be curved, it is dispersed. Fc force S, so that it is possible to
faithfully reproduce the high-frequency component of the audio signal with the inner (I11
diaphragm 14 and outer diaphragm 15), and it is possible to widen the frequency band of the
reproduced sound's frequency band Ru. On the other hand, as shown in FIG. S, in the
conventional speaker, both the inner diaphragm 31 and the outer diaphragm 32 are formed by
simply forming flat members in a ring shape, so each diaphragm 31.32 The shape from one end
to the other is linear. Because of this? The concentrated stress applied to the fixed portion
(indicated by the broken line M) between the bin 20 and the inner diaphragm 11 diaphragm 14
and the outer diaphragm 15 is not dispersed, and this deteriorates the reproduction of the high
frequency component of the audio signal. It is the cause of FIG. 4 is a diagram showing sound
pressure frequency characteristics of the ring speaker of this embodiment and a conventional
ring speaker. In the figure, the solid line A indicates the sound frequency characteristic of the
speaker of this embodiment, and the broken line B indicates the sound pressure frequency
characteristic of the conventional speaker described above. As shown, according to the
loudspeaker of this embodiment, the frequency band of reproduced sound can be extended as
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compared with the conventional loudspeaker.
The present invention is not limited to the above embodiments. For example, as shown in FIGS. 5
(m) to (.), The same effect as that of the previous embodiment can be obtained. That is, in the
case shown in FIG. 5 (,), the outer diaphragm 15 is formed to be linear in cross section, and the
inner diaphragm 14 is formed to be curved in the direction of the arrow X2 behind the speaker.
is there. In addition, EndPage: 2 same figure (b) as shown in (b) K, the inner diaphragm 14 is
linear, the outer diaphragm 15 is moved forward, one f,? It forms so that it may curve in the
arrow X 1 direction of illustration. The inner diaphragm 14 and the outer diaphragm 15 shown
in FIG. It is formed to be curved in the force direction and the X1 direction. In FIG. 6D, the inner
diaphragm 14 is straight and the outer diaphragm 15 is formed to be curved in the direction of
the arrow X1. In the example shown in (-) of the figure, the inner diaphragm 14 and the outer
diaphragm 15 are formed to be curved in the direction of the arrow X1 and in the direction of
the arrow X2, respectively. Furthermore, the present invention is not only applied to squawkers,
but is applicable to ring-shaped speakers in general. As described above, according to the present
invention, it is possible to disperse the concentrated stress of the fixed portion K between the
gevin and the inner and outer diaphragms, so that a ring-shaped speaker capable of illustrating a
wide band of the reproduced sound frequency band is provided. Can be provided. 1 (a) and 1 (b)
are respectively a schematic perspective view and a schematic cross-sectional view showing an
embodiment of a ring-type speaker according to the present invention, and FIG. 2 is an enlarged
view of the main part of FIG. Fig. 3 is a cross-sectional view of Fig. 3 a) floor-shaped eagle-shaped
line "hf" 1 large scale tortoise " Ground imitation effecter S sail width U part 1 is a cause for
remorse for people at, and FIGS. 5 (,) through (-) are enlarged schematic cross-sectional views of
the essential parts showing the embodiment of the rattan of this invention. 11: Great, 12: Frame,
13: Equalizer, 14: Diaphragm on the inner circumferential side, 15: A diaphragm on the outer
circumferential side, 16: A support, 17: 17 Pole piece, 18: permanent magnet, 19: top plate, 20:
bin, 21: disfill, 22: dan / # sjJ: signal transmission line. Applicants Attorney Attorneys Suzue
Takehito 1 Figure (a) (b) 711 years old 2 Figure P4 End Page: 3 points 5 (a) (C) (C) (e) (b) (d) End
Page: 4
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