JP2005223414

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DESCRIPTION JP2005223414
PROBLEM TO BE SOLVED: To provide a speaker device which is easy to attach to a structure or
the like and which can obtain a sufficient acoustic effect. SOLUTION: A cylindrical outer yoke 11,
a voice coil 12 attached to the inner peripheral surface of the outer yoke 11, a diaphragm 13
concentrically disposed inside the outer yoke 12, and the diaphragm 13 The dampers 15A and
15B which support the vibration of the outer yoke 13 in a direction parallel to the center line of
the outer yoke 13, the plate 16 attached to the outer peripheral portion of the diaphragm 13 and
facing the voice coil 12, and the plate 16 The magnets 17A and 17B and the inner yokes 18A
and 18B attached to the magnets 17A and 17B and opposed to the inner peripheral portion of
the outer yoke 12 are provided. [Selected figure] Figure 2
Speaker device
[0001]
The present invention relates to the configuration of a speaker device.
[0002]
FIG. 1 shows an example of use of a conventional speaker device.
[0003]
In the example of use of FIG. 1, for example, a pipe that constitutes a frame of a seat of a
passenger car or the like is used as a sound wave passage of the speaker device, thereby
maintaining the strength of the seat and increasing its outer shape and weight. The speaker
device is attached to the inside of the seat, and the other end 2B of the pair of hollow frames 2
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disposed on both sides inside the backrest 1A of the seat 1 and having one end 2A open The
speaker devices 3 are respectively attached.
[0004]
Then, the frame 2 is used as a resonance part or a volume part of the sound output from the
speaker device 3, and the sound output from the speaker device 3 passes through the inside of
the frame 2 from the open end 2A to a room such as a passenger car. The sound is emitted (see,
for example, Patent Document 1).
[0005]
A speaker device that can be attached to such a seat using the frame pipe has not yet been
developed specifically, and it is sufficient when attached using a conventional speaker device.
There are problems such as the inability to obtain an acoustic effect.
[0006]
Unexamined-Japanese-Patent No. 2003-235088
[0007]
SUMMARY OF THE INVENTION One of the problems to be solved by the present invention is to
solve the problems in a speaker device attached to a structure as described above using a frame
pipe or the like.
[0008]
A speaker device according to the present invention (the invention according to claim 1) has a
cylindrical outer yoke member, a voice coil member attached to the inner peripheral surface of
the outer yoke member, and the above-mentioned to achieve the above object. The diaphragm
member concentrically disposed inside the outer yoke member, and interposed between the
diaphragm member and the outer yoke member side, vibrates the diaphragm member in a
direction parallel to the center line of the outer yoke member A damper member freely
supported, a plate member attached to the outer peripheral portion of the diaphragm member
and facing the voice coil member, a magnet member attached to the plate member, and an outer
yoke member attached to the magnet member And an inner yoke member opposed to the inner
peripheral portion of
[0009]
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According to the present invention, the voice coil is attached to the central portion of the inner
peripheral surface of the cylindrically shaped outer yoke, and the diaphragm is concentrically
disposed inside the outer yoke, and between the diaphragm and the outer yoke Is supported so
as to be able to vibrate in a direction parallel to the center line of the outer yoke by a damper
inserted in the plate, a plate is attached to the outer peripheral portion of the diaphragm and
opposed to the voice coil, and a magnet is attached to this plate Further, the inner yoke is
attached to the magnet, and the inner yoke is opposed to the inner peripheral surface of the
outer yoke at a predetermined interval to make the speaker apparatus having the magnetic
circuit the best. It is an embodiment.
[0010]
In the speaker device according to this embodiment, the voice coil is positioned in the magnetic
field formed between the plate magnetized by the magnet and the outer yoke, and an electric
current is generated in the voice coil to generate an electromagnetic force. The vibrating plate
vibrates in a direction parallel to the center line of the outer yoke with respect to the outer yoke
fixed to the resonator or the like by the electromagnetic force to generate sound.
[0011]
According to the speaker device according to this embodiment, by setting the outer diameter of
the outer yoke to a size equal to or smaller than the outer diameter of the resonator or the like to
which the speaker device 10 is attached, the speaker device can be installed in a structure In any
case, it is not necessary to secure the mounting space in particular, so that the mounting
becomes easy and a sufficient acoustic effect can be obtained.
[0012]
Furthermore, the speaker device according to this embodiment can lower the lowest resonance
frequency by providing a moving magnet type configuration, which enables the reproduction of
ultra-low tones.
[0013]
FIG. 2 is a side sectional view showing a first example of the embodiment of the speaker
apparatus according to the present invention, and FIG. 3 is a sectional view taken along line III-III
in FIG.
[0014]
In FIGS. 2 and 3, the speaker device 10 has a ring on the inner peripheral central portion of the
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outer yoke 11 formed of a cylindrical magnetic body having an inner diameter equal to the inner
diameter of the pipe P to which the speaker device 10 is attached. A spiral groove 11A is formed,
and a spiral coil coil 12 is fixed in the concave groove 11A in a fitted state.
[0015]
A disc-like diaphragm 13 having an outer diameter smaller than the inner diameter of the outer
yoke 11 is disposed at a position facing the voice coil 12 in the outer yoke 11, and the
diaphragm 13 has a central portion A center shaft 14 fixed so as to pass through is attached.
[0016]
Then, dampers 15A and 15B are interposed between the end portions on both sides of the center
shaft 14 and the outer yoke 11 at both side positions of the diaphragm 13, and the diaphragms
13 are separated by the dampers 15A and 15B. It is coaxially supported in the yoke 11 and can
be vibrated in the axial direction.
[0017]
The magnets 15A and 15B may be interposed between a frame (for example, a pipe forming an
acoustic resonance unit as described later) to which the outer yoke 11 is attached and the center
shaft 14.
[0018]
A ring-shaped plate 16 having an inner diameter equal to the outer diameter of the diaphragm
13 and an outer diameter smaller than the inner diameter of the voice coil 12 fixed to the outer
yoke 11 by a predetermined dimension on the outer peripheral portion of the diaphragm 13 Are
externally fitted and integrally fixed to the diaphragm 13.
[0019]
The plate 16 is disposed together with the diaphragm 13 so as to be opposed to the voice coil 12
at a substantially central position.
[0020]
On both sides of the plate 16, a pair of ring-shaped magnets (in this example, neodymium
magnets are used) 17A, 17B having an outer diameter smaller than the outer diameter of the
plate 16, The plate 16 is magnetized in a concentric manner so that the same pole (in this
example, the N pole) is abutted against the plate 16.
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[0021]
Further, inner yokes 18A and 18B having the following shapes are fixed to the outer side
surfaces of the magnets 17A and 17B, respectively.
[0022]
That is, the inner yokes 18A and 18B have respective inner end sides of the main body portions
18Aa and 18Ba which are each formed into a substantially cylindrical shape whose diameter of
the outer peripheral surface is smaller by a predetermined dimension than the inner diameter of
the voice coil 12 (magnets 17A and 17B The inner flanges 18Ab and 18Bb are integrally formed
on the side facing each other.
[0023]
The inner flanges 18Ab and 18Bb are concentrically fixed to the outer surfaces of the magnets
17A and 17B by bonding or the like, so that the inner yokes 18A and 18B respectively have
outer peripheral surfaces of the main portions 18Aa and 18Ba and a voice It is positioned in the
outer yoke 11 with a gap of the same dimension open all the way between it and the inner
circumferential portion of the coil 12.
[0024]
At this time, in the inner yokes 18A and 18B, a substantially half portion of the inner end side
(the side fixed to the magnets 17A and 17B) of the outer peripheral surface of the main body
portions 18Aa and 18Ba is opposed to the voice coil 12, and the outer end side An approximately
half portion of is opposed to the outer yoke 11.
[0025]
The inner yokes 18A and 18B guide the magnetic flux from the magnets 17A and 17B toward
the outer yoke 11 from the outer yoke 11 to the inner direction and return them to the magnets
17A and 17B as described later. By functioning as well as increasing the air resistance in the gap
with the outer yoke 11, it functions to restrict the flow of air between the spaces on both sides
partitioned by the diaphragm 13.
[0026]
FIG. 4 is an operation explanatory view showing the flow of magnetic lines of force in the speaker
device 10.
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[0027]
Next, the operation of the speaker device 10 will be described based on FIG.
[0028]
In FIG. 4, the lines of magnetic force of the magnetic field formed by the magnets 17A and 17B
are directed from the plate 16 magnetized to the N pole toward the opposing outer yoke 11 and
are divided into left and right inside the outer yoke 11 and passed The outer yoke 11 is directed
to the inner yokes 18A and 18B facing the inner circumferential surface of the outer yoke 11,
respectively, and returns to the magnets 17A and 17B through the inner yokes 18A and 18B.
[0029]
In this state, for example, when current flows from the back side to the front side in the drawing
(from the back side to the front side of the drawing) to the upper part (portion shown in FIG. 4)
of the voice coil 12, 4 generates an electromagnetic force in the left direction in FIG. 4 with
respect to the plate 16 by the magnetic field in the direction of the magnetic force line A, and the
voice coil 12 is fixed, thereby attaching the diaphragm 13 together with the plate 16 in the right
direction x1. Be driven.
[0030]
At this time, at the same time, a magnetic field in the direction of magnetic field lines B directed
from the outer yoke 11 to the inner yokes 18A and 18B through the portion where the voice coil
12 is attached generates a rightward electromagnetic force in FIG. The inner yokes 18A and 18B
are biased in the left direction x2.
[0031]
However, the magnetic lines of force of the magnetic field from the outer yoke 11 toward the
inner yokes 18A and 18B pass through the portion where the voice coil 12 is not attached from
the outer yoke 11 as indicated by the magnetic lines of force C, Since there is a portion that does
not generate an electromagnetic force by moving toward the inner yokes 18A and 18B, the
biasing force in the right direction x1 with respect to the diaphragm 13 by the magnetic field of
the magnetic field line A is due to the magnetic field of the magnetic field line B. The biasing
force to the diaphragm 13 in the left direction x2 is larger.
[0032]
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As a result, the diaphragm 13 is moved by the magnetic field in the direction of the magnetic line
of force A in the right direction x1 of FIG.
[0033]
Similarly, when current flows in the voice coil 12 in the opposite direction, the diaphragm 13 is
moved in the left direction x2, and as a result, the diaphragm 13 is vibrated.
[0034]
As shown in FIG. 2, for example, the speaker device 10 has the same outer diameter as the outer
diameter of the pipe P to which the speaker device 10 is attached, as shown in FIG. The mounting
space of the speaker device 10 is particularly secured in the structure even when the frame pipe
is attached to the pipe constituting the frame of the structure and the frame pipe is used as an
acoustic resonance portion or an acoustic volume portion of the speaker device 10 It is not
necessary to do so, which makes it easy to attach and to obtain a sufficient acoustic effect.
[0035]
And the said speaker apparatus 10 can make the lowest resonant frequency low by having the
structure of a moving magnet system, and, thereby, reproduction ¦ regeneration of an ultra-low
sound is attained.
[0036]
In the above, an example in which a ring-shaped magnet is used for the magnets 17A and 17B of
the speaker device 10 is shown, but instead of the ring-shaped magnets 17A and 17B, a plurality
of magnets are used. The block-shaped magnet may be circumferentially arranged and attached
to the side surface of the outer edge portion of the plate 16.
[0037]
In addition, the outer yoke 11 and the plate 16, the inner yokes 18A and 18B form a slit for
electrically interrupting each arbitrary position to reduce generation of the eddy current, or each
It may be made up of a plurality of pieces.
[0038]
In addition, a fin structure may be provided on the outer peripheral surface of the outer yoke 11,
whereby heat radiation generated from the voice coil 12 can be promoted by energization and
efficiency of electrical input can be improved. .
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[0039]
Moreover, as the dampers 15A and 15B, any material or shape can be used as long as it has air
permeability.
[0040]
5 to 13 are cross-sectional views showing an example of use of the speaker device 10,
respectively.
[0041]
FIG. 5 shows a first use example in which a pipe P1 having the same diameter as the outer yoke
11 is connected as an acoustic resonance unit to one end of the outer yoke 11 of the speaker
device 10.
[0042]
FIG. 6 shows a second usage example in which a horn P2 whose proximal end has the same
diameter as the outer yoke 11 and whose distal end is spread like a trumpet is connected to one
end of the outer yoke 11 of the speaker device 10 .
[0043]
FIG. 7 shows a third application example in which pipes P3 and P4 having the same diameter as
the outer yoke 11 but having different lengths but different resonances are connected to both
ends of the outer yoke 11 of the speaker device 10, respectively. It is shown.
[0044]
In FIG. 8, a pipe-shaped sound having the same diameter as that of the outer yoke 11 is formed
at the one end side of the outer yoke 11 of the speaker device 10 and the base end side has an
acoustic volume P5A larger than the outer diameter of the outer yoke 11. A fourth usage
example is shown in which a pipe (Helmholtz resonator) P5 that constitutes the resonance
portion P5B is connected.
[0045]
In FIG. 9, as in the example of FIG. 7, pipes P6 and P7 which have the same diameter as the outer
yoke 11 but different lengths and different resonances are provided at both ends of the outer
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yoke 11 of the speaker device 10. Are connected to each other, but in the example of FIG. 7,
while the tip openings of the pipes P3 and P4 are directed 180.degree. Opposite to each other,
the pipes P6 and P7 are curved and the respective tip openings A fifth use case is shown where
P6a, P7a are oriented in the same direction.
[0046]
In FIG. 10, acoustic volume portions P8A and P9A larger than the outer diameter of the outer
yoke 11 are provided at both ends of the outer yoke 11 of the speaker device 10, and the
acoustic volume portions P8A and P9A are provided in the same direction. A sixth usage example
is shown, in which band pass regenerators P8 and P9, which are opened and are constituted by
pipe-like acoustic resonators P8B and P9B having different lengths, are connected.
[0047]
In FIG. 11, as in the example of FIG. 8, an acoustic volume portion P10A in which the base end
side is larger than the outer diameter of the outer yoke 11 is configured on one end side of the
outer yoke 11 of the speaker device 10 The Helmholtz resonator P10 constituting the acoustic
resonator P10B is connected, but in the example of FIG. 8 the tip opening of the Helmholtz
resonator P5 is located on the opposite side to the mounting position of the speaker device 10 A
seventh usage example is shown in which the acoustic resonance portion P10B of the Helmholtz
resonator P10 is bent 180 ° and the tip opening P10a is located on the same side as the
speaker device 10.
[0048]
12, a pipe P11 having the same diameter as that of the outer yoke 11 is connected as an acoustic
resonance unit to one end of the outer yoke 11 of the speaker device 10 as in the example of FIG.
In the example, the end opening of the pipe P1 is located on the opposite side to the mounting
position of the speaker device 10, while the pipe P11 is bent 180 ° and the end opening P11a is
located on the same side as the speaker 10 An eighth use case is shown.
[0049]
In FIG. 13, as in the case of the example of FIG. 6, a horn P12 whose proximal end has the same
diameter as the outer yoke 11 and whose distal end is spread like a trumpet is connected to one
end of the outer yoke 11 of the speaker device 10 In the example of FIG. 6, the tip opening of the
horn P2 is located on the opposite side to the mounting position of the speaker device 10,
whereas the horn P12 is bent 180 ° and the tip opening P12a is A ninth use case is shown
which is located on the same side.
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[0050]
FIG. 14 is a side sectional view showing a second example of the embodiment of the speaker
device according to the present invention.
[0051]
In the speaker device 20 of FIG. 14, the outer end portions 28Ac, 28Bc of the main body portions
28Aa, 28Ba of the inner yokes 28A, 28B are curved in a direction approaching the outer yoke 11
side, and the outer end portions 28Ac. , 28Bc and the inner circumferential surface of the outer
yoke 11 are smaller than the gaps between the main body portions 28Aa, 28Ba and the inner
circumferential surface of the outer yoke 11.
[0052]
The configuration of the other parts is substantially the same as the configuration of the speaker
device 10 of the first embodiment of FIG. 2, and the same components as those of the speaker
device 10 of FIG.
[0053]
As described in the first embodiment, the inner yokes 28A and 28B direct the magnetic flux from
the magnets 17A and 17B toward the outer yoke 11 from the outer yoke 11 to the inside of the
magnets 17A and 17B. While having the function of guiding in the direction of returning, it also
has the function of restricting the flow of air between the two spaces separated by the diaphragm
13 by increasing the air resistance in the gap with the outer yoke 11 However, as described
above, since the outer end portions 28Ac, 28Bc of the inner yokes 28A, 28B facing the outer
yoke 11 are closer to the outer yoke 11 than the main body portions 28Aa, 28Ba, from the outer
yoke 11 Function of guiding the magnetic flux of the magnet 17A, 17B in the direction of
feedback, and the flow of air between the space on both sides of the diaphragm 13 is restricted.
Ability is enhanced, thereby, it becomes possible to further improve the sound generation
efficiency of the speaker device 20.
[0054]
In the above, although the outer end portions 28Ac, 28Bc of the main body portions 28Aa, 28Ba
of the inner yokes 28A, 28B are curved toward the outer yoke 11 side, the gap with the outer
yoke 11 is reduced. Other ring-shaped parts may be attached to the outer peripheral surface of
the outer end portion of the main body portions 28Aa and 28Ba to reduce the gap with the outer
yoke 11.
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[0055]
Next, the dimensions of each portion of the release mechanism 20 will be described in more
detail.
[0056]
That is, in FIG. 14, the plate 16 is positioned at the position opposed to the center position in the
width direction of the voice coil 12 when the plate 16 is at rest, and in this state, the width a of
the voice coil 12 reaches the speaker device 20. Is set to be equal to or more than twice the
amplitude of the diaphragm 13 when the input is maximum.
[0057]
The outer end of each of the inner yokes 28A, 28B is located at a position opposite to the central
position of the portion between the outer end of the outer yoke 11 and the outer end of the voice
coil 12 when in its resting state. The width b of the portion between the outer end of the outer
yoke 11 and the outer end of the voice coil 12 is set to be at least twice the amplitude of the
diaphragm 13 when the input to the speaker device 20 is maximum. .
[0058]
As a result, even at the maximum amplitude of the diaphragm 13, there is no possibility that the
outer end portions 28Ac, 28Bc of the inner yokes 28A, 28B will come off from the position
facing the outer yoke 11 to break the magnetic flux. It is possible to prevent the occurrence of
distortion in the sound.
[0059]
The distance d between the outer end portions 28Ac, 28Bc of the main body portions 28Aa,
28Ba and the outer yoke 11 is a space between the main body portions 28Aa, 28Ba of the inner
yokes 28A, 28B and the outer yoke 11 It is set to be less than half of c.
[0060]
As a result, the sound generation efficiency of the speaker device 20 is improved.
[0061]
FIG. 15 shows a modification of the shape of the inner yoke of the speaker device 20. As shown
in FIG.
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[0062]
In this example, the main body portions 38Aa and 38Ba of the inner yokes 38A and 38B are
formed in a concave shape toward the inside (the center side of the outer yoke 11), and between
the main body portions 38Aa and 38Ba and the outer yoke 11 The spacing e is set to be larger
than the spacing c in the example of FIG.
[0063]
The respective outer end portions 38Ac and 38Bc of the main body portions 38Aa and 38Ba rise
in a direction approaching the outer yoke 11, and the distance f between the outer end portions
38Ac and 38Bc and the outer yoke 11 is It is set to be approximately equal to the case of the
example of FIG.
[0064]
FIG. 16 is a side sectional view showing a third example of the embodiment of the speaker device
according to the present invention.
[0065]
The speaker device 40 of FIG. 16 has the disk-like diaphragm 13 attached to the speaker device
10 of FIG. 2, whereas the two cone-shaped diaphragms 43A and 43B have their respective
apexes outside each other. It is what is attached in the state where it was turned to and put
together.
[0066]
The dampers 15A and 15B are connected to the tops of the two cone-shaped diaphragms 43A
and 43B, respectively.
[0067]
The configuration of the other parts is the same as the configuration of the speaker device 10 of
FIG. 2, and the same components are denoted by the same reference numerals.
[0068]
The configuration of the two cone-shaped diaphragms 43A and 43B is also applicable to the
configuration of the speaker device 20 shown in FIG. 14 and the speaker device shown in FIG.
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[0069]
FIG. 17 is a side sectional view showing a fourth example of the embodiment of the speaker
device according to the present invention.
[0070]
In this FIG. 17, the speaker device 50 is a ring-shaped concave groove in the central portion on
the inner surface side of the outer yoke 51 formed of a cylindrical magnetic body having an inner
diameter equal to the inner diameter of the pipe P to which the speaker device 10 is attached.
51A is formed, and a spiral voice coil 52 is fixed in a fitted state in the recessed groove 51A.
[0071]
A disc-shaped diaphragm 53 having an outer diameter smaller than the inner diameter of the
outer yoke 51 is disposed at a position opposite to the voice coil 52 in the outer yoke 51, and the
diaphragm 53 penetrates the central portion thereof. A fixed center shaft 54 is mounted.
[0072]
Then, dampers 55A and 55B are interposed between the end portions on both sides of the center
shaft 54 and the outer yoke 51 at both side positions of the diaphragm 53, and the diaphragms
53 are separated by the dampers 55A and 55B. It is concentrically and axially and vibratably
supported in the yoke 51.
[0073]
A ring-shaped plate 56 having an inner diameter equal to the outer diameter of the diaphragm
53 and an outer diameter smaller than the inner diameter of the voice coil 52 fixed to the outer
yoke 51 by a predetermined dimension on the outer peripheral portion of the diaphragm 53. Are
externally fitted and integrally fixed to the diaphragm 53.
[0074]
The plate 56 is disposed together with the vibrating plate 53 so as to be positioned substantially
at the center of the voice coil 52.
[0075]
A ring-shaped magnet (in this example, a neodymium magnet is used) 57 having an outer
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diameter smaller than the outer diameter of the plate 56 is concentric on one side (right side in
the illustrated example) of the plate 56. In this case, magnetization (in this example, N pole) to
the plate 56 is fixed.
[0076]
Furthermore, an inner yoke 58 having the following shape is fixed to the outer side surface of the
magnet 57.
[0077]
That is, the inner yoke 58 has an outer peripheral surface on the inner end side (side facing the
magnet 57) of the main body portion 58a formed in a substantially cylindrical shape smaller
than the inner diameter of the voice coil 52 by a predetermined dimension. The inner flange
portion 58b has a shape integrally formed.
[0078]
Then, the inner flange portion 58 is concentrically fixed to the outer surface of the magnet 57 by
adhesion or the like, so that the inner yoke 58 is entirely between the outer peripheral surface of
the main body portion 58 a and the inner peripheral portion of the voice coil 52. It is positioned
in the outer yoke 51 with a gap of the same size open across the circumference.
[0079]
At this time, in the inner yoke 58, a substantially half portion on the inner end side (the side fixed
to the magnet 57) of the outer peripheral surface of the main body portion 58a faces the voice
coil 52, and a substantially half portion on the outer end side. Is opposed to the outer yoke 51.
[0080]
In the speaker device 50, magnetic lines of force of the magnetic field formed by the magnet 57
are directed from the plate 56 magnetized in the N pole toward the opposing outer yoke 51, and
pass through the inside of the outer yoke 51 in the right direction of FIG. Then, it travels from
the outer yoke 51 to the inner yoke 58 facing the inner peripheral surface of the outer yoke 51,
passes through the inside of the inner yoke 58, and returns to the magnet 57.
[0081]
In this state, for example, when current flows through the voice coil 12, an electromagnetic force
is generated according to Fleming's law, and the diaphragm 53 is vibrated together with the plate
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56 by the voice coil 52 being fixed.
[0082]
Also in the above embodiment, as shown in FIG. 18, a cone-shaped diaphragm 63 may be
attached instead of the disk-shaped diaphragm 53.
[0083]
It is a perspective view which shows the example of use of the conventional speaker apparatus.
It is a sectional side view which shows 1st Example of embodiment of this invention.
It is sectional drawing in the III-III line of FIG.
It is explanatory drawing which shows the structure of the magnetic circuit in the speaker
apparatus of the example.
It is a sectional side view which shows the 1st usage example of the speaker apparatus of the
example.
It is a sectional side view which shows the 2nd usage example of the speaker apparatus of the
example.
It is a sectional side view which shows the 3rd usage example of the speaker apparatus of the
example.
It is a sectional side view which shows the 4th usage example of the speaker apparatus of the
example.
It is a sectional side view which shows the 5th usage example of the speaker apparatus of the
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example.
It is a sectional side view which shows the 6th usage example of the speaker apparatus of the
example.
It is a sectional side view which shows the 7th usage example of the speaker apparatus of the
example.
It is a sectional side view which shows the 8th usage example of the speaker apparatus of the
example.
It is a sectional side view which shows the 9th usage example of the speaker apparatus of the
example.
It is a sectional side view which shows 2nd Example of embodiment of this invention.
It is a fragmentary sectional view showing the modification of the example.
It is a sectional side view which shows 3rd Example of embodiment of this invention.
It is a sectional side view which shows 4th Example of embodiment of this invention.
It is a sectional side view which shows the modification of the example.
Explanation of sign
[0084]
10, 20, 40, 50 ... speaker device 11 ... outer yoke (outer yoke member) 12 ... voice coil (voice coil
member) 13, 43A, 43B, 53, 63 ... diaphragm (diaphragm member) 15A, 15B, 55A , 55B ...
Damper (damper member) 16, 56 ... Plate 17A, 17B, 57 ... Magnet (magnet member) 18A, 18B,
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28A, 28B, 38A, 38B, 58 ... Inner yoke (inner yoke member) 18Aa, 18Ba, 28Aa , 28Ba, 38Aa, 38Ba
... main body 28Ac, 28Bc, 38Ac, 38Bc ... outer end portion P, P1, P3, P4, P5, P6, P7, P11 ... pipe
(acoustic resonance member) P2, P12 ... horn (acoustic resonance Member) P8, P9 ... Band pass
regenerator (acoustic resonance member) P10 ... Helmholtz resonator Acoustic resonant
member)
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