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DESCRIPTION JP6265518

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DESCRIPTION JP6265518
Abstract: A sound wave output from the front of a speaker unit is more effectively prevented
from coming around behind. A speaker device includes at least a vibrator including a first portion
formed with a circumferential wall so as to have a cylindrical shape, and a second portion formed
with a circumferential wall so as to form a cone shape. And driving means for driving the vibrator
100 with the magnet 50 and the voice coil 60, wherein one end of the first portion 110 and the
bottom of the second portion 120 are integrated, and the other portion of the first portion 110
The end and the head of the second portion 120 are occluded, and the driving means drives the
vibrator 100 so that the first portion 110 moves parallel to the central axis of the first portion
110, and the first portion 110 is moved. The sound wave is output from the output surface 111
of [Selected figure] Figure 2
Speaker device
[0001]
The present invention relates to the technology of a speaker.
[0002]
Conventionally, by providing a baffle plate, sound waves output from the front of the speaker
unit are prevented from coming around behind (for example, non-patent document 1).
[0003]
Hayashi Masanori, "Hayashi Hayashi audio course", [online], June 28, 2007, PHILE WEB,
[September 8, 2017 search], Internet <URL: http://www.phileweb.com /magazine/audio-
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course/archives/2007/06/28.html>
[0004]
An object of the present invention is to more effectively prevent the sound waves output from the
front of the speaker unit from coming around behind.
[0005]
In order to solve the above-mentioned subject, the 1st mode of the present invention has the 1st
part where a peripheral wall was formed so that cylindrical shape may be made, and the 2nd site
where a peripheral wall was formed so that pyramid shape may be made. A vibrator, and driving
means for driving the vibrator having at least a magnet and a voice coil, wherein one end of the
first portion and the bottom of the second portion are integrated, and the first The other end of
the part and the head of the second part are occluded, and the other end face of the first part and
the second part face outward, and the driving means is the first part It is a speaker apparatus
which drives the said vibrator so that it may move in parallel with the central axis of the said 1st
site | part, and outputs a sound wave from the other end surface of the said 1st site | part.
[0006]
In the second aspect of the present invention, it is preferable that the second portion has a
frusto-conical shape and the end face on the head side is closed.
[0007]
In the third aspect of the present invention, preferably, the first portion has a cylindrical shape,
and the second portion has a conical shape.
[0008]
The fourth aspect of the present invention further includes a frame that supports the vibrator on
an inner circumferential surface of a cylindrical shape via an edge and a damper, and the second
portion is outward from an end of the inner circumferential surface. It is preferable that it is
protruded to the
[0009]
According to the first aspect of the present invention, since the pressure change around the
radial direction of the first portion is suppressed when the vibrator is driven, the sound wave
output forward from the other end surface is the first portion It is possible to suppress the wrap
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around the circumference of the, that is, wrap around in the rear as viewed from the other end
surface.
[0010]
Furthermore, according to the first aspect of the present invention, the sound wave from the
outer peripheral surface of the second portion is driven when the vibrator is driven because the
peripheral wall of the second portion having a pyramidal shape faces obliquely backward instead
of directly behind. However, since the signal is output diagonally backward, it can be suppressed
that the signal is output right behind and reflected forward.
[0011]
According to the second aspect of the present invention, it is possible to suppress that a large
sound wave is output rearward from the head of the second portion.
[0012]
According to the third aspect of the present invention, the vibrator can have a simple shape.
[0013]
According to the fourth aspect of the present invention, sound waves from the outer peripheral
surface of the second portion are output obliquely rearward while enabling the vibrator to be
supported by the frame.
[0014]
FIG. 1 is a perspective view showing a configuration example of a speaker device in the first
embodiment.
FIG. 2 is a cross-sectional view showing a configuration example of the speaker device in the first
embodiment.
FIG. 3 is a cross-sectional view showing a configuration example of the speaker device in the
second embodiment.
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FIG. 4 is a cross-sectional view showing a configuration example of the speaker device in the
third embodiment.
FIG. 5 is a cross-sectional view showing a configuration example of the speaker device according
to the fourth embodiment.
FIG. 6 is a view showing another configuration example of the vibrator in the first embodiment.
FIG. 7 is a view showing still another configuration example of the vibrator in the first
embodiment.
[0015]
Embodiments of the present invention will be described with reference to the drawings.
First Embodiment In the first embodiment, a speaker device is mentioned.
(Configuration) FIG. 1 and FIG. 2 are diagrams showing a configuration example of the speaker
device 1 in the first embodiment.
FIG. 1 is a perspective view of the speaker device 1, and FIG. 2 is a cross-sectional view of the
speaker device 1.
[0016]
As shown in FIGS. 1 and 2, the speaker device 1 includes a frame unit 10, a magnet 50, a voice
coil 60, an edge 70, a damper 80, and a vibrator 100.
The frame unit 10 has a leg 20 and a support 30.
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The legs 20 are portions for installing the speaker device 1 on the floor or the like.
The leg portion 20 has a ground portion 21 and an attachment portion 22.
For example, the grounding portion 21 has a rectangular plate shape. An attachment portion 22
is provided substantially at the center of the ground portion 21. For example, the mounting
portion 22 is in the shape of a rod having a substantially rectangular cross section. A support 30
for supporting the vibrator 100 is provided at the upper end of the attachment 22.
[0017]
In the support portion 30, the peripheral wall 31 has a thick, substantially cylindrical shape. The
central axis 30 a of the support 30 is directed in the horizontal direction. For example, in the
frame portion 10, the leg portion 20 and the support portion 30 are integrally formed of a resin
material such as plastic. The magnet 50 is disposed in the peripheral wall 31 of the support
portion 30 of the frame portion 10. Further, an edge 70 and a damper 80 are provided on the
inner circumferential surface 32 of the support portion 30. The vibrator 100 is disposed on the
inner peripheral side of the support portion 30 by being supported by the edge 70 and the
damper 80.
[0018]
The magnet 50 is a donut shaped permanent magnet. Thus, the magnet 50 is positioned along
the circumferential direction of the peripheral wall 31 of the support portion 30. In the present
embodiment, the magnet 50 is disposed in the support portion 30 at a substantially intermediate
position in the axial direction. The edge 70 is provided at the front end of the inner
circumferential surface 32 of the support 30. The edge 70 is formed to connect the inner
circumferential surface 32 of the support portion 30 and the outer circumferential surface 101
of the vibrator 100, and has a substantially thin film or substantially thin disk shape. The damper
80 is formed at the rear end of the inner circumferential surface 32 of the support 30. The
damper 80 is formed to connect the inner circumferential surface 32 of the support portion 30
and the outer circumferential surface 101 of the vibrator 100, and has a substantially thin film or
substantially thin disk shape.
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[0019]
The vibrator 100 is a hollow first portion 110 located on the front side and having a peripheral
wall formed to have a cylindrical shape, and a hollow second portion 110 located on the rear side
and having a peripheral wall formed to have a frusto-conical shape. And a site 120. Here, one end
of the first portion 110 and the bottom of the second portion 120 are integrated. That is, the
diameter of the vibrator 100 is gradually reduced at the second portion 120 from the rear end of
the first portion 110.
[0020]
In addition, the front end of the first portion 110 is closed and formed in a plane, and the head
that is the rear end of the second portion 120 is also closed and formed in a plane. The flat
portion 111 at the front end of the first portion 110 and the flat portion 121 of the head of the
second portion 120 are in a parallel relationship. Further, the length of the first portion 110 is
substantially the same as the length of the inner peripheral surface 32 of the support portion 30,
the front end of the outer peripheral surface 101 of the first portion 110 is supported by the
edge 70, and the outer periphery of the first portion 110 The rear end of the surface 101 is
supported by the damper 80. Due to such a structure, the second portion 120 protrudes
rearward from the rear end of the support portion 30 and faces outward. The central axis 100 a
of the vibrator 100 coincides with the central axis 30 a of the support portion 30.
[0021]
Here, the flat portion 111 at the front end of the first portion 110 is a portion for outputting a
sound wave in the speaker device 1. In the following description, the flat portion 111 at the front
end of the first portion 110 is also referred to as an output surface 111. A voice coil 60 is formed
on the first portion 110 at an outer peripheral surface 101 and substantially in the middle in the
axial direction. As a result, the voice coil 60 is positioned on the inner circumferential side of the
magnet 50 disposed in the peripheral wall of the support portion 30.
[0022]
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(Operation, Function, Etc.) Next, the operation, function, etc. of the speaker device 1 according to
the first embodiment will be described. In the speaker device 1, when a current is supplied to the
voice coil 60, the voice coil 60 is displaced in the central axis direction of the magnet 50,
whereby the vibrator 100 supported by the frame portion 10 via the edge 70 and the damper 80
is also It is driven. As a result, a sound wave is output from the output surface 111 of the
transducer 100.
[0023]
At this time, since only the first portion 110 having a cylindrical shape moves in parallel in the
central axis direction at the time of driving, a pressure change around the radial direction of the
first portion 110 is suppressed. Sound waves do not wrap around the first portion 110. That is,
even if the baffle plate is not provided, the sound wave output from the output surface 111 can
be prevented from coming around in the back direction of the vibrator 100.
[0024]
In addition, the sound waves from the outer peripheral surface 122 of the second portion 120
are diagonally backward when driven because the peripheral wall of the second portion 120
having a pyramidal shape is not directly behind but obliquely backward (direction closer to the
lateral direction). Because it is output to the, it can be suppressed that it is output to the rear and
reflected to the front.
[0025]
(Effects of the First Embodiment) (1) Since the pressure change around the radial direction of the
first portion 110 is suppressed when the vibrator 100 is driven, the speaker device 1 outputs
forward from the output surface 111 It can be suppressed that the emitted sound wave wraps
around the first portion 110, that is, it wraps around the output surface 111 backward.
Thus, the speaker device 1 can more effectively prevent the sound wave output from the front
side from coming around behind. The speaker device 1 also makes it possible to eliminate the
need for a housing-like enclosure by diffusing the sound waves of the opposite phase and
attenuating the sound waves of the opposite phase at the listening point.
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[0026]
(2) In the speaker device 1, when the peripheral wall of the second portion 120 in a pyramidal
shape faces obliquely backward instead of directly behind, sound waves from the outer
circumferential surface 122 of the second portion 120 are driven when the vibrator 100 is
driven, Since the signal is output obliquely backward, it can be suppressed that the signal is
directly output backward and reflected forward. Further, in the speaker device 1, the sound wave
generation surface of the normal phase which is the output surface 111 is perpendicular to the
vibration direction, while the sound wave generation surface of the reverse phase which is the
outer peripheral surface 122 of the second portion 120 is the first portion It is closer to the
direction of the outer peripheral surface 101 of the 110 and closer to parallel, and the surface
area is wider in each step than the area of the sound wave generation surface of the positive
phase, so that sound waves can be diffused and weakened. I have to.
[0027]
(3) In the speaker device 1, a large sound wave is output rearward from the head of the second
portion 120 by making the second portion 120 a frusto-conical shape and making the head of
the second portion 120 flat. You can control the (4) In the speaker device 1, the first portion 110
has a cylindrical shape, and the second portion 120 has a conical shape. Therefore, the vibrator
100 can be formed in a simple shape.
[0028]
(5) The speaker device 1 allows the vibrator 100 to be supported by the frame portion 10 since
the second portion 120 protrudes rearward from the rear end of the support portion 30 and
faces outward. Sound waves from the outer peripheral surface of the two portions 120 are
output obliquely backward without being disturbed by the frame 10.
[0029]
Second Embodiment Next, a second embodiment will be described with reference to the
drawings.
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In addition, about the structure similar to above-mentioned 1st Embodiment, the same code |
symbol is attached | subjected and demonstrated. The second embodiment also mentions a
speaker device. In the second embodiment, a magnet is disposed in the vibrator.
[0030]
(Configuration) FIG. 3 is a cross-sectional view showing a configuration example of the speaker
device 2 in the second embodiment. As shown in FIG. 3, the speaker device 2 includes a frame
unit 210, a magnet 250, a voice coil 260, an edge 270, a damper 280, and a vibrator 300. The
frame portion 210 has legs 211. The leg portion 211 is a portion for installing the speaker
device 2. The leg portion 211 includes a ground portion 211 a and an attachment portion 211 b.
For example, the grounding portion 211a has a disk shape. An attachment portion 211 b is
provided substantially at the center of the ground portion 211 a. For example, the attachment
portion 211 b is in the shape of a bar having a substantially rectangular cross section. The
magnet 250 is attached to one side surface 211b1 of the upper end of the attachment portion
211b. Further, the damper 280 is attached to the other side surface 211 b 2 of the upper end of
the attachment portion 211 b.
[0031]
For example, the magnet 250 is a donut shaped, cylindrical permanent magnet. A rear end
surface 250 a of the magnet 250 is attached to the attachment portion 211 b such that the
central axis is directed in the horizontal direction. Further, an edge 270 is attached to the front
end surface 250 b of the magnet 250. For example, a cover is attached to surround the outer
periphery of the magnet 250, and an edge 270 is attached to the cover. The vibrator 300 is
supported by the edge 270 attached to the magnet 250 and the damper 280 attached to the
attachment portion 211 b.
[0032]
The vibrator 300 has substantially the same shape as the vibrator 100 in the first embodiment.
That is, the vibrator 300 is a hollow first portion 310 located on the front side and having a
circumferential wall formed to have a cylindrical shape, and a hollow having a circumferential
wall formed to have a frusto-conical shape located on the rear side. And a second portion 320.
Here, one end of the first portion 310 and the bottom of the second portion 320 are integrated.
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That is, the diameter of the vibrator 300 is gradually reduced at the second portion 320 from the
rear end of the first portion 310.
[0033]
In addition, the front end of the first portion 310 is closed and formed in a plane, and the head
that is the rear end of the second portion 320 is also closed and formed in a plane. The output
portion 311 at the front end of the first portion 310 and the flat portion 321 of the head of the
second portion 320 have a parallel relationship. In the second embodiment, in the vibrator 300, a
portion slightly behind the front end of the inner peripheral surface 312 of the first portion 310
is supported by the edge 270, and the rear end of the inner peripheral surface 312 of the first
portion 310 is The part is supported by the damper 280. Further, an opening 313 in which a
part of the peripheral wall is opened is formed in the first portion 310, and the attachment
portion 211 b of the leg portion 211 penetrates the inside of the opening 313 and is attached to
the magnet 250. A voice coil 260 is formed on the first portion 310 at the outer peripheral
surface 314 and substantially in the middle in the axial direction. Thus, the voice coil 260 is
positioned on the outer peripheral side of the magnet 250 disposed in the support portion 30.
[0034]
(Operation, Function, Etc.) Next, the operation, function, etc. of the speaker device 2 in the second
embodiment will be described. In the speaker device 2, when current is supplied to the voice coil
260, the voice coil 260 is displaced in the central axis direction of the magnet 250, thereby
driving the vibrator 100 supported by the edge 270 and the damper 280. As a result, a sound
wave is output from the output surface 311 of the transducer 300.
[0035]
At this time, since only the first portion 310 having a cylindrical shape moves in parallel in the
central axis direction at the time of driving, a pressure change around the radial direction of the
first portion 310 is suppressed. Sound waves do not wrap around the first portion 310. That is,
even if the baffle plate is not provided, the sound wave output from the output surface 311 can
be prevented from coming around in the back direction of the vibrator 300.
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[0036]
In addition, the sound waves from the outer peripheral surface 322 of the second portion 320
when obliquely driven are obliquely rearward when the peripheral wall of the second portion
320 having a pyramidal shape is not directly behind but obliquely backward (direction closer to
the lateral direction). Because it is output to the, it can be suppressed that it is output to the rear
and reflected to the front.
[0037]
(Effects of the Second Embodiment) In the second embodiment, the following effects can be
obtained in addition to the effects similar to the effects of the first embodiment.
(1) The speaker device 2 has a compact structure because the magnet 250, the edge 270 and the
damper 280 are accommodated in the vibrator 300.
[0038]
Third Embodiment Next, a third embodiment will be described with reference to the drawings. In
addition, about the structure similar to above-mentioned 1st and 2nd embodiment, the same
code | symbol is attached | subjected and demonstrated. The third embodiment also cites a
speaker device. And in 3rd Embodiment, two magnets are arrange | positioned so that a voice
coil may be pinched | interposed. This speaker device is a so-called push-pull speaker device.
[0039]
(Configuration) FIG. 4 is a cross-sectional view showing a configuration example of the speaker
device 2 in the third embodiment. As shown in FIG. 4, the speaker device 3 includes a frame
portion 410, two magnets 451 and 452, a voice coil 460, an edge 470, a damper 480, and a
vibrator 500.
[0040]
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In the third embodiment, magnets 451 and 452 are disposed in the peripheral wall 431 of the
support portion 430 of the frame portion 410, respectively, in front and rear of the peripheral
portion 431, as compared with the first embodiment. Each magnet 451, 452 is a donut shaped
permanent magnet. Thus, the magnets 451 and 452 are disposed along the circumferential
direction of the peripheral wall 431 of the support portion 430. Also, the magnets 451 and 452
are arranged such that the same magnetic poles face each other. In the present example, the
south poles of the magnets 451 and 452 face each other.
[0041]
Similar to the first embodiment, the voice coil 460 is formed on the outer peripheral surface 501
of the first portion 510 at a substantially middle portion in the axial direction. Thus, the voice
coil 460 is positioned between the two magnets 451 and 452 disposed in the support 460.
[0042]
(Operation, Function, Etc.) Next, the operation, function, etc. of the speaker device 3 in the third
embodiment will be described. In the speaker device 3, when current is supplied to the voice coil
460, the voice coil 460 is displaced in the central axis direction of the magnets 451, 452 so that
the vibrator is supported by the frame portion 410 via the edge 470 and the damper 480. 500 is
also driven. As a result, a sound wave is output from the output surface 511 of the transducer
500.
[0043]
At this time, since only the first portion 510 having a cylindrical shape moves in parallel in the
central axis direction at the time of driving, a pressure change around the radial direction of the
first portion 510 is suppressed. Sound waves do not wrap around the first portion 510. That is,
even if the baffle plate is not provided, the sound wave output from the output surface 511 can
be prevented from coming around in the back direction of the vibrator 500. In addition, the
sound waves from the outer peripheral surface 522 of the second portion 520 at the time of
driving are obliquely rearward when the peripheral wall of the second portion 520 having a
pyramidal shape is not directly behind but obliquely backward (direction closer to the lateral
direction). Because it is output to the, it can be suppressed that it is output to the rear and
reflected to the front.
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[0044]
(Effects of the Third Embodiment) In the third embodiment, even when the speaker device 3
adopts a method having two magnets 451 and 452, the effects of the first and second
embodiments are obtained. Similar effects can be obtained.
[0045]
Fourth Embodiment Next, a fourth embodiment will be described with reference to the drawings.
In addition, about the structure similar to above-mentioned 1st thru | or 3rd embodiment, the
same code | symbol is attached | subjected and demonstrated. The fourth embodiment also
mentions a speaker device. In the fourth embodiment, two magnets are disposed to sandwich the
voice coil. This speaker device is also a so-called push-pull speaker device as in the third
embodiment.
[0046]
(Configuration) FIG. 4 is a cross-sectional view showing a configuration example of the speaker
device 3 in the fourth embodiment. As shown in FIG. 4, the speaker device 3 includes a frame
portion 610, two magnets 651 and 652, a voice coil 660, an edge 670, a damper 680, and a
vibrator 700.
[0047]
In the fourth embodiment, the leg portion 211 includes a ground portion 611 and first and
second attachment portions 612 and 613 in comparison with the second embodiment. For
example, the ground portion 611 has a disk shape. First and second attachment portions 612
and 613 are provided at both ends of the ground portion 611, respectively. For example, the first
and second attachment portions 612 and 613 have a bar shape having a substantially
rectangular cross section. The first magnet 651 is attached to the upper end of the first
attachment portion 612. In addition, a second magnet 652 is attached to the upper end of the
second attachment portion 613. The first portion 710 is provided with first and second openings
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713 and 714 in which a part of the peripheral wall is opened, and the first and second
attachment portions 612 and 613 are first and second openings 713, 714 penetrates the inside
of 714 and is attached to the 1st and 2nd magnet 651 and 652, respectively.
[0048]
For example, the first and second magnets 651 and 652 are donut-shaped and cylindrical
permanent magnets. Each of the magnets 651 and 652 is disposed such that the central axis is
directed in the horizontal direction. In addition, a support member 655 is bridged between the
rear end surface 651 a of the front first magnet 651 and the front end surface 652 a of the rear
second magnet 652, and the first magnet 651 and the second magnet 652 are formed by the
support member 655. And is maintained at a constant interval. The edge 670 is attached to the
front end surface 651 b of the first magnet 651, the damper 680 is attached to the rear end
surface 652 b of the second magnet 652, and the vibrator 700 is supported by the edge 670 and
the damper 680.
[0049]
Similar to the second embodiment, the voice coil 660 is formed on the outer peripheral surface
701 of the first portion 710 at a substantially middle portion in the axial direction. As a result,
the voice coil 660 is positioned between the two magnets 651 and 652 disposed in the first
portion 710.
[0050]
(Operation, Function, Etc.) Next, the operation, function, etc. of the speaker device 4 in the fourth
embodiment will be described. In the speaker device 4, when current is supplied to the voice coil
660, the voice coil 660 is displaced in the central axis direction of the magnets 651, 652 so that
the vibrator 700 supported by the edge 670 and the damper 680 is also driven. As a result,
sound waves are output from the output surface 711 of the transducer 700.
[0051]
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At this time, since only the first portion 710 having a cylindrical shape moves in parallel in the
central axis direction at the time of driving, a pressure change around the radial direction of the
first portion 710 is suppressed. Sound waves do not wrap around the first portion 710. That is,
even if the baffle plate is not provided, the sound wave output from the output surface 711 can
be prevented from coming around in the back direction of the vibrator 700.
[0052]
In addition, the sound waves from the outer peripheral surface 722 of the second portion 720 at
the time of driving are diagonally backward when the peripheral wall of the second portion 720
in a pyramidal shape is not directly behind but obliquely backward (direction closer to the lateral
direction). Because it is output to the, it can be suppressed that it is output to the rear and
reflected to the front. In the above description, the magnet and the voice coil constitute, for
example, a driving means.
[0053]
(Effects of the Fourth Embodiment) In the fourth embodiment, even when the speaker apparatus
4 adopts a method having two magnets 651 and 652, the effects of the first to third
embodiments described above and Similar effects can be obtained.
[0054]
(Modification etc. of this embodiment) As another example of the above-mentioned embodiment,
the second part can also be made conical.
That is, the head of the second portion can be formed to have a vertex without being flat. Further,
as another example of the above-described embodiment, the second portion may be formed into
a triangular pyramid shape, a square mesh shape, or the like in which the bottom surface is a
polygon.
[0055]
In addition, as another example of the above-mentioned embodiment, the second part can also be
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in the shape of a pyramid whose bottom is an ellipse. Also, as another example of the above
embodiment, the vibrator can be made solid instead of hollow. In addition, as another example of
the above-mentioned embodiment, the corner of the boundary portion of the side surface and the
outer peripheral surface of the vibrator can be eliminated and processed into a curved surface.
For example, in the first embodiment, a boundary portion between the outer surface and the
outer peripheral surface of the output surface 111 in the first portion 110, a boundary portion
between the outer peripheral surface of the first portion 110 and the outer peripheral surface of
the second portion 120, or A boundary portion between the outer surface and the outer
peripheral surface of the flat portion 121 in the two portions 120 is processed into a curved
surface.
[0056]
FIG. 6 is a diagram showing another configuration example of the vibrator 800 in the first
embodiment. As shown in FIG. 6, the transducer 800 has a first portion 810 and a second portion
820. The first portion 810 has a cylindrical shape. The second portion 820 has a substantially
conical shape, but the diameter gradually decreases so that the outer circumferential surface
curves from the boundary portion with the first portion 810 toward the tip.
[0057]
FIG. 7 is a diagram showing yet another configuration example of the vibrator 900 in the first
embodiment. As shown in FIG. 7, the vibrator 900 has a first portion 910 and a second portion
920. The first portion 910 has a cylindrical shape. The second portion 920 has a substantially
conical shape, but the diameter largely decreases at the boundary with the first portion 810 and
then gradually decreases in diameter toward the tip. That is, the outer peripheral surface of the
second portion 920 is formed to be streamlined.
[0058]
Also, while embodiments of the present invention have been disclosed, it will be apparent that
modifications can be made by one skilled in the art without departing from the scope of the
present invention. All such modifications and equivalents are intended to be included in the
following claims.
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[0059]
1, 2, 3, 4 speaker device, 100, 300, 500, 700, 800, 900 vibrator, 110, 310, 510, 710, 810, 910
first portion 120, 320, 520, 720, 820, 920 Second part, 50, 250, 451, 452, 651, 652 magnet,
60, 260, 460, 660 voice coil
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