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JP2002336786

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2002336786
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the
improvement of a vibration actuator device having functions such as vibration generation, voice
generation, and buzzer sound generation.
[0002]
2. Description of the Related Art Generally, as shown in FIG. 17, a vibration actuator device
comprises a diaphragm 3 having a cylindrical housing 1 as a base frame and a voice coil 2
mounted on the inner surface side, and lead wires 2a of the voice coil 2 (2b) is drawn out of the
housing 1 and the diaphragm 3 is fitted and fixed to the open end 1a of the housing 1, and
further, the lead wire 2a (2b) of the voice coil 2 is projected outward from the side wall of the
housing 1 The terminal block 1b (1c) is soldered and fixed to the terminal fitting 4a (4b), and the
terminal fitting 4a (4b) is used as a feed terminal of the current-carrying circuit portion.
[0003]
A magnet 6 having the pole piece 5 fixed thereto and a yoke 7 for holding the magnet 6
integrally with the pole piece 5 with the magnetic gap G between the pole piece 5 and the
conducting circuit portion are provided. Are supported by the thin plate-like suspensions 8a and
8b and assembled inside the housing 1, and the voice coil 2 is inserted into the magnetic gap G
between the pole piece 5 and the yoke 7 to form a magnetic circuit portion. The cap 9 having the
sound release holes 9a, 9b,... Is attached to the open end 1d of the housing 1 to form a cap.
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[0004]
In the configuration of the vibration actuator device, the two inner suspensions 8a (8b) for
supporting the magnetic circuit unit include a central inner ring 80 fitted and fixed to the outer
periphery of the yoke as shown in FIG. The assembly is provided with three disk portions 81 to
83 extending in the same direction from the outer circumferential peripheral fixed interval
position, and the whole is formed into a substantially disk shape.
[0005]
As the vibration actuator device, it is required depending on the model to assemble by providing
a substantially rectangular housing in which one width is formed relatively narrow in relation to
the mounting space in the housing of the device body to be assembled.
In order to assemble this vibration actuator device, the above-described suspension can not be
assembled into a substantially rectangular housing in which one width is formed relatively
narrow from a location having a large disk-like outer shape.
[0006]
SUMMARY OF THE INVENTION The present invention focuses mainly on the shape or assembly
structure of a suspension, and even if it is provided with a substantially rectangular housing in
which one width is formed relatively narrow, the magnetic circuit portion is preferable. It is an
object of the present invention to provide a vibration actuator device that can be assembled while
maintaining stable vibration characteristics.
[0007]
At the same time, it is an object of the present invention to provide a vibration actuator device
assembled so as to stably wire the lead wire of the voice coil and prevent disconnection of the
lead wire.
[0008]
Another object of the present invention is to provide a vibration actuator device that is assembled
so as to be able to exhibit good vibration characteristics by including a magnetic circuit unit
having a robust structure.
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[0009]
Still another object of the present invention is to provide a vibration actuator device that can be
assembled so as to provide impact resistance without widening the width of the housing.
[0010]
In addition, it is another object of the present invention to provide a vibration actuator device
that is assembled so as to exhibit good vibration characteristics by including a magnetic circuit
unit that maintains an even weight balance.
[0011]
In a vibration actuator device according to claim 1 of the present invention, a housing serving as
an enclosure wall and a magnet having a magnetic piece fixed between a pole piece and a pole
piece fixed with a yoke are used as a yoke. A magnetic circuit unit held and a diaphragm formed
by mounting a voice coil on the inner surface side, the magnetic circuit unit is supported by two
suspensions, and each suspension is stretched inward from the inner wall surface of the housing
for magnetic The circuit portion is vibratably mounted, and the voice coil is inserted in the
magnetic gap between the pole piece and the yoke to stretch the diaphragm inside the wall end
face of the housing, and the voice coil is pulled out of the housing. Lead wire electrically
connected to the terminal fitting provided on the outer surface of the housing, with one width A
pair of narrowly formed substantially rectangular housings, located in a narrow area of the
housing, and having a continuous root from the outer peripheral edge of the main part
supporting the magnetic circuit part in a symmetrical position, The two suspensions are provided
with two arm parts extending in opposite directions of the parts, and the arm parts located in the
same area of the narrow width of the housing mutually cross each other in opposite directions
crossing each other to make the respective magnetic The magnetic circuit portion is configured
to be vibratably mounted by attaching each suspension to the inner surface of the narrow width
wall of the housing at the projecting end of the arm portion while assembling to the circuit
portion.
[0012]
In a vibration actuator device according to a second aspect of the present invention, a concave
groove is provided which receives a lead of a voice coil, having a housing whose inner
circumference is relatively narrow in width so as to exhibit a substantially oval track shape. A
voice coil lead wire provided on the narrow end face of the housing and drawn around the edge
of the diaphragm is wired in the groove of the recess and connected to the terminal fitting.
[0013]
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The vibration actuator device according to claim 3 of the present invention is configured by
providing two suspensions having different vibration performance.
[0014]
In the vibration actuator device according to a fourth aspect of the present invention, the flat disk
is formed with a receiving circular portion with a concave in cross section and a peripheral
flange protruding from the open end of the receiving circular portion. A yoke is provided, and
two suspensions formed of an annular main part and two arm parts are provided, and a first
suspension, a spacer ring and a second suspension are stacked in this order and fitted on the
outer periphery of the receiving part, Furthermore, a retaining ring for holding the second
suspension is fitted on the outer periphery of the receiving plate, and a magnetic circuit is
formed by integrally assembling and fixing two suspensions from the outer peripheral flange of
the yoke and the retaining ring. ing.
[0015]
In the vibration actuator device according to the fifth aspect of the present invention, the spacer
ring in which the stopper for lateral vibration control protrudes outward from the circumferential
relative position, and the outer peripheral edge corresponding to the protruding base of the
stopper are linear. It is constructed by assembling the notched yoke, the suspension and the
retaining ring, receiving the stopper of the spacer ring by the recess provided on the inner wall
of the long side of the housing, and assembling the magnetic circuit part inside the housing.
[0016]
In the vibration actuator device according to a sixth aspect of the present invention, the device
further comprises a yoke, a suspension and a spacer ring provided with semicircular notched
edges matching each other at the outer peripheral edge, and the yoke, suspension and spacer
ring are engaged with the notched edges of each part. It comprises positioning by the support
pin of the assembly jig to engage, and providing the suspension and the magnetic circuit part
which assembled the spacer ring to the outer periphery of the yoke.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION The vibration actuator device according to
the illustrated embodiment is a floating system in which the magnetic circuit portion is made to
oscillate by the reaction force of the force generated in the voice coil. By applying a vibration
signal that matches the resonance frequency of the magnetic circuit unit to the voice coil, the
magnetic circuit unit is greatly vibrated with a frequency signal of 130 to 140 Hz to exhibit a
vibrator function and a frequency signal of 800 Hz to 4 KHz. It is configured as an
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electrodynamic type that vibrates only the diaphragm by applying voltage to reproduce a loud
ringing tone or a receiving tone.
[0018]
The vibration actuator device is mounted on a device body such as a mobile phone, the mounting
side of the cap with little leakage flux is directed to the outside of the housing, and the mounting
side of the diaphragm with large leakage flux is the board of the circuit board It is configured in
the reverse direction so that it is assembled and installed in the equipment toward the surface.
In addition, the lead wire of the voice coil is attached to the diaphragm from the side where the
diaphragm is attached so that the solder bumps that electrically connect and fix the lead wire of
the voice coil with the terminal metal fitting do not interfere with the contact of the terminal
metal fitting with the feed land of the circuit board. It is comprised by wiring to the attachment
side of a cap.
[0019]
In the basic form, as shown in FIGS. 1 and 2, the housing 10 serving as an enclosure wall is used
as a base frame, and the magnetic gap G is maintained between the pole piece 11 and the magnet
12 with the pole piece 11 fixed. The magnetic circuit unit E is supported by a double suspense
structure of two suspensions 16a and 16b, and the respective suspensions are provided. The
magnetic circuit portion E is vibratably mounted by stretching the inner surfaces 16a and 16b
inside the wall inner surface of the housing 10.
[0020]
Further, the voice coil 14 described above is inserted into the magnetic gap G held between the
pole piece 11 and the yoke 13 to stretch the diaphragm 15 inward from the wall end surface of
the housing 10, and The lead wire 14a (14b) drawn out is electrically connected to the terminal
fitting 17a (17b) provided on the wall outer surface of the housing 10, and a cap 18 having a
central opening is attached to the open end of the housing 10 Is configured by.
[0021]
As the housing 10, as shown in FIGS. 3 to 5, one of the housings 10 is normally wide (hereinafter
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referred to as "long side (X direction)") in view of vibration transmission efficiency.
And the other is referred to as a "short side (Y direction)" because of the mounting space.
And a track shape with a substantially elliptical inner circumference.
In the housing 10, terminal blocks 100a and 100b to which the terminal fittings 17a and 17b are
attached are provided on the outer surface of the wall by dividing them into positive and negative
electrodes with a slit 100c at the center.
[0022]
In the housing 10, concave grooves 10a and 10b for wiring the lead wires 14a and 14b of the
voice coil 14 are provided on the narrow end face on the narrow side.
The recessed grooves 10a and 10b are provided in an arc shape so as to continue from the inner
peripheral edge of the housing 10 to the slits 100c of the terminal blocks 100a and 100b.
Recesses 10c and 10d for receiving projecting stoppers provided on the spacer ring for
preventing lateral deviation described later are provided on the inner surface of the long side (X
direction).
[0023]
In addition, four corners (indicated by reference numerals common to each part) located in the
narrow side area of the housing 10 are shown.
In the case of suspension mounting, the holes 10e, 10f, 10g, 10h have different depths by
projecting the stop pins 10i, 10j, 10k, 10l at the center of the bottom (see Fig. 1). It is provided.
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In addition, a stepped portion 10m is provided on the end face of the end of the diaphragm 15 to
which the outer peripheral edge is fitted, and a stepped portion 10n is provided on the outer
surface of the cap 18 on which the rising edge is fitted. .
[0024]
The magnetic circuit portion E housed inside the housing 10 is provided with a spacer ring 19
and a retaining ring 20 as shown in FIGS. 1 and 2 and is provided with suspensions 16a and 16b
of a double suspense structure fitted to the outer periphery of the yoke 13. It is supported.
[0025]
In the configuration, the suspensions 16a and 16b are located within the area on the short side
(Y direction) of the housing 10 as shown in FIGS. 6 and 7 together with FIG. 4, and a circle
supporting the magnetic circuit portion E. Bases 161a, 161b, 161a ', 161b' continuous from the
outer peripheral edge of the annular main portion 160, 160 'are set at symmetrical positions,
and two arm portions 162a extending outward in opposite directions of the main portions 160,
160'. , 162b, 162a 'and 162b'.
[0026]
Each of the suspensions 16a and 16b is formed by inserting the holes 163a, 163b and 163a 'and
163b' into the arm protuberances 164a and 164b. , 164a 'and 164b' are formed so as to be
attached to the inner wall surface of the short side (the Y direction) of the housing 10.
[0027]
In addition, each suspension 16a (16b) has straight edges 165a, 165b, 165a ', 165b' whose outer
peripheral edges are cut out corresponding to the protruding base of the stopper provided on the
spacer ring, and at the time of assembly of the magnetic circuit portion. Semicircular notched
edges 166a, 166b, 166a ', 166b' are provided which are positioned by the support pins of the
assembly jig.
Among them, the straight edges 165a, 165b, 165a 'and 165b' are provided so as to be located on
the long side (X direction) of the housing.
The notch edges 166a, 166b, 166a 'and 166b' are provided in the plane of the projecting pieces
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167a, 167b, 167a 'and 167b' directed to the short side (Y direction) of the housing.
[0028]
A yoke 13 serving as a base of the magnetic circuit portion E is a flat circular, concave crosssection receiving portion 130 for fixing the magnet 12 including the disc-shaped pole piece 11
inside as shown in FIGS. And an outer peripheral flange portion 131 projecting from the open
end of
Similar to the suspension, the yoke 13 is also provided with linear edges 132a and 132b that are
notched at the outer peripheral edge corresponding to the protruding base of the stopper
provided on the spacer ring and beveled at the tip end side.
In addition, semicircular notch edges 133a and 133b positioned by the support pins of the
assembly jig at the time of assembly of the magnetic circuit portion are provided in the plane of
the projecting pieces 134a and 134b.
[0029]
The spacer ring 19 sandwiched between the suspensions 16a and 16b includes a ring base 190
having a predetermined thickness as shown in FIGS. 11 to 13, and the stopper 191a and 191b
for lateral deflection control is provided around the ring base 190. It is formed so as to project
outward from the long side (X direction) of the housing.
The stoppers 191a and 191b are formed as step portions 192a and 192b capable of locking one
of the suspensions, so as to have a rise corresponding to the thickness of the suspension.
Further, semicircular notched edges 193a and 193b positioned by the support pins of the
assembling jig at the time of assembling the magnetic circuit portion are provided in the planes
of the projecting pieces 194a and 194b directed to the short side (the Y direction) of the housing.
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[0030]
The retaining ring 20 of the suspension 16b is formed substantially in the shape of an O ring
except that it has straight edges 200a and 200b whose outer peripheral edges are cut out in
accordance with the projecting base of the stopper provided on the spacer ring as shown in FIG.
There is.
Like the other components, the retaining ring 20 can be provided with a semicircular cutout edge
positioned by the support pins of the assembling jig at the time of assembling the magnetic
circuit portion in the plane of the projecting piece.
[0031]
With this configuration, as shown in FIGS. 1 and 2, the suspension 16a applied to the outer
peripheral flange portion 131 of the yoke 13 is the first, and the spacer ring 19 and the second
suspension 16b are stacked in this order to Further, the retaining ring 20 for holding the second
suspension 16b is fitted into the outer periphery of the receiving plate 130, and the two
suspensions are integrally assembled and fixed from the outer peripheral flange portion 131 of
the yoke 13 and the retaining ring 20. By doing this, the magnetic circuit unit E can be
assembled as a structurally robust one.
[0032]
When the magnetic circuit unit E is assembled, the suspensions 16a and 16b cross arm portions
162a, 162a ', 162b and 162b' located within the same narrow width area of the housing 10 as
shown in FIG. It is fitted on the outer periphery of the saucer portion 130 provided on the yoke
13 by facing the opposite direction.
[0033]
When the first suspension 16a, the spacer ring 19, and the second suspension 16b are stacked in
order and fitted into the receptacle 130 of the yoke 13, support pins (not shown) of the assembly
jig are provided in each component The semicircular notched edges 166a, 166b, 193a, 193b,
166a ', 166b' are engaged and positioned.
Thereby, even if each component is formed in a non-circular irregular shape, it can be easily
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assembled so as to keep the overall weight balance even.
[0034]
In order to assemble the magnetic circuit portion E into the inside of the housing 10, the fixing
holes 10e, 10f, 10g, 10h and the retaining pins 10i, 10j, 10k of the holes 163a, 163b, 163a ',
163b' of the suspensions 16a, 16b. , 10l are attached to the inner wall surface of the short side
(the Y direction) of the housing 10 with the arm tips 164a, 164b, 164a ', 164b'.
[0035]
In order to prevent the energy due to the vibration of the magnetic circuit unit E from being lost
at the cross arm portions 162a, 162a ', 162b and 162b', it is preferable to provide two
suspensions 16a and 16b having different vibration performance.
As the suspensions 16a and 16b, one arm portion 162a and 162b is fixedly fixed by the arm
projecting end 164a and 164b, while the other arm portion 162a 'and 162b' is softly fixed by
arm projecting end 164a 'and 164b'. It is equipped by.
[0036]
In addition, while having a metal suspension on one side and a suspension based on a resin or a
paper material on the other side, or by using the same material, changing the thickness or shape
of the suspensions or the arms mutually changes Also, it is provided as two suspensions with
different vibration performance.
[0037]
In the assembled state of the magnetic circuit portion E, the stoppers 191a and 191b of the
spacer ring 19 are received inside the concave portions 10c and 10d provided on the inner wall
of the long side (X direction) of the housing 10 with a gap maintained. Be
The stoppers 191a and 191b are provided on the yoke 13, the suspensions 16a and 16b, and the
retaining ring 20 so that the straight edges 132a and 132b, 165a and 165b, 165a 'and 165b'
and 200a and 200b correspond to the projecting base. It assembles | attaches as predetermined
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inside the recessed part 10c, 10d.
[0038]
The lead wires 14a and 14b of the voice coil 14 are concave grooves 10a and 10b provided in an
arc shape continuously from the inner peripheral edge of the housing 10 to the slit 100c of the
terminal block 100a and 100b at the wall end face of the short side (Y direction). Since the
wiring is performed along the inside of the groove, stable wiring can be performed without
disconnection or peeling of the insulating film.
Besides, the diaphragm 15 and the cap 18 may be assembled as usual.
[0039]
In the vibration actuator device thus configured, the wall of the housing 10 is formed by the two
arm portions 162a, 162a ', 162b, and 162b' in which the magnetic circuit portion E is located in
the same region on the short side (Y direction) of the housing 10. Since it is attached to the inner
surface, the magnetic circuit portion E can be assembled even with a substantially rectangular
housing 10 of which one is formed relatively narrow.
At the same time, since the arm parts mutual 162a, 162a ', 162b, 162b' located in the same area
on the short side (Y direction) of the housing 10 are assembled in the opposite direction to cross
each other, the magnetic circuit part E It can be stably supported and vibrated greatly.
[0040]
In this vibration actuator device, as described above, the contact portion to be in electrical
contact with the feed land of the circuit board for reverse mounting is provided on the
attachment side of the diaphragm 15, and the flat portion is electrically connected to the lead of
the voice coil 14. The terminal fitting 17a (17b) provided on the attachment side of the cap 18 is
provided.
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Also, wire the lead wire 14a (14b) of the voice coil 14 drawn out of the housing 10 from the
attachment side of the diaphragm 3 to the attachment side of the cap 9 and divide it into the flat
plate portion of the terminal fitting 17a (17b) and + and-poles. It is electrically connected.
[0041]
The terminal fitting 17a (17b) is made of a thin metal plate having conductivity such as phosphor
bronze or titanium copper, and a U-shaped fitting plate portion 170 is disposed at the center as
shown in FIG. A flat plate portion 172 for connecting lead wires is bent in parallel via a rising
plate portion 171 maintaining a predetermined gap from one side end of the fitting plate portion
170, and a downward slope from the other side end of the fitting plate portion 170. What is bent
and formed from a contact portion 174 for feeding land connection, which is curved in an upper
chord shape from a diagonally extending plate spring portion 173, is provided.
[0042]
In this terminal fitting 17a (17b), as shown in FIG. 16, as the contact portion 174 is in pressure
contact with the feed land r1 (r2) of the circuit board P, the contact portion 174 can be spring
displaced to ensure electrical contact. It can be taken.
[0043]
As described above, according to the vibration actuator device according to claim 1 of the
present invention, the arm portions located within the same narrow width region of the housing
are mutually opposed in the cross direction opposite to each other. One width was made
relatively narrow by attaching a single suspension to the magnetic circuit unit and attaching each
suspension to the inner surface of the narrow width of the housing at the end of the arm unit so
that the magnetic circuit unit could swing. Even if it has a substantially rectangular housing, it is
assembled so as to stably maintain good vibration characteristics by the magnetic circuit part.
[0044]
According to the vibration actuator device of the second aspect of the present invention, the
concave portion is provided with a housing having a relatively narrow width so that the inner
circumference exhibits a substantially oval track shape, and a concave for receiving the lead of
the voice coil. A groove is provided on the narrow end face of the housing, and the lead wire of
the voice coil drawn out from around the edge of the diaphragm is wired in the groove of the
concave groove and connected to the terminal fitting, the lead wire breakage or the insulating
coating It is assembled by wiring stably well so as not to cause peeling and the like.
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[0045]
According to the vibration actuator device of claim 3 of the present invention, by providing two
suspensions having different vibration performances, the energy due to the vibration of the
magnetic circuit portion can be assembled so as not to be lost between the mutually crossing arm
portions.
[0046]
According to the vibration actuator device of the fourth aspect of the present invention,
structurally robust, in which two suspensions are pressed down from the outer peripheral flange
portion of the yoke and the retaining ring via the spacer ring and integrally fixed. The magnetic
circuit unit is assembled so as to exhibit good vibration characteristics.
[0047]
According to the vibration actuator device according to claim 5 of the present invention, the
spacer ring in which the stopper for lateral vibration control protrudes outward from the
circumferential relative position, and the outer peripheral edge corresponding to the protruding
base of the stopper are straight. The width of the housing is assembled by assembling the yoke,
the suspension, and the retaining ring cut out like a shape, receiving the stopper of the spacer
ring by the recess provided on the inner wall of the long side of the housing and assembling the
magnetic circuit part inside the housing. It is assembled so that shock resistance can be given
without spreading.
[0048]
According to the vibration actuator device of the sixth aspect of the present invention, the yoke,
the suspension and the spacer ring are provided with the semicircular notched edges in phase
matching with each other on the outer peripheral edge, and the yoke, the suspension and the
spacer ring are notched edges By assembling the magnetic circuit unit by positioning with the
support pins of the assembly jig engaged with the magnetic circuit unit, the magnetic circuit unit
maintaining the even weight balance can be assembled so as to exhibit good vibration
characteristics.
[0049]
Brief description of the drawings
[0050]
1 is a cross-sectional view showing the internal structure of the vibration actuator device
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according to the present invention from the long side.
[0051]
2 is a cross-sectional view showing the vibration actuator device from the short side.
[0052]
3 is a plan view showing the vibration actuator device from the diaphragm side.
[0053]
4 is a plan view showing the vibration actuator device from the yoke side.
[0054]
5 is a plan view showing a housing constituting the vibration actuator device.
[0055]
6 is a plan view showing the suspension on one side of the double suspense structure
constituting the same actuator device.
[0056]
7 is a plan view showing the other suspension of the double suspension structure constituting
the actuator device.
[0057]
8 is a plan view showing a yoke constituting the magnetic circuit portion of the actuator device.
[0058]
9 is a cross-sectional view showing the yoke of FIG. 8 taken along the line A-A.
[0059]
10 is a cross-sectional view showing the yoke of FIG. 8 taken along the line B-B.
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[0060]
11 is a plan view showing the spacer ring of the suspension constituting the same actuator
device.
[0061]
12 is a cross-sectional view showing the spacer ring of FIG. 11 taken along the line A-A.
[0062]
13 is a cross-sectional view showing the spacer ring of FIG. 11 taken along the line B-B.
[0063]
14 is a plan view showing the stop ring of the suspension that constitutes the same actuator
device.
[0064]
15 is a side view showing a terminal fitting constituting the same actuator device.
[0065]
16 is an explanatory view showing a vibration actuator device provided with the terminal fitting
of FIG. 15 assembled to the device body.
[0066]
17 is a side sectional view showing a vibration actuator device according to the general example.
[0067]
18 is a perspective view showing an example of the suspension assembled to the vibration
actuator device according to the general example.
[0068]
Explanation of sign
[0069]
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DESCRIPTION OF REFERENCE NUMERALS 10 housing 11 pole piece 12 magnet 13 yoke 14
voice coil 14 a, 14 b voice coil lead wire 15 diaphragm 16 a, 16 b suspension E magnetic circuit
portion
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