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JP2005277872

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2005277872
PROBLEM TO BE SOLVED: To provide a speaker device provided with a waterproof damper
having high adhesive strength with a diaphragm. In a speaker device, a support member is
disposed on a central axis, a diaphragm is provided on an outer periphery of the support
member, and a damper is provided on the diaphragm. In a preferred example, the damper is
waterproof. The inner peripheral edge portion of the damper is fixed to the support member on
the sound emitting surface side of the diaphragm, and the outer peripheral edge portion is fixed
to the diaphragm. The damper has a turn-up portion rising from the diaphragm to the sound
output side on the outer peripheral side of the fixed position with respect to the diaphragm. By
forming a folded portion at the outer peripheral end of the damper, when bonding the outer
peripheral edge portion of the damper to the diaphragm, the outer peripheral edge portion of the
damper is suppressed from being deformed (swelled) by the solvent of the adhesive or the like It
can prevent. Thereby, the fall of the adhesive strength by swelling of an adhesion part can also
be prevented. Further, since the strength of the damper itself at the outer peripheral edge portion
is increased, the strength of the fixed portion between the damper and the diaphragm can be
sufficiently secured, and unnecessary vibration of the vibration system can be suppressed.
[Selected figure] Figure 3
Speaker device
[0001]
The present invention relates to the structure of a speaker device provided with a waterproof
damper.
[0002]
04-05-2019
1
The ship speaker is attached, for example, to the bow or stern of the ship.
For this reason, if water or damp water infiltrates into the magnetic circuit, the magnetic circuit
may rust. In addition, water may infiltrate into the hull through the vessel speaker.
[0003]
In order to solve such a problem, in the case of the ship speaker, a waterproof damper made of
an elastomer material or the like (hereinafter, also referred to as a "waterproof damper") in
addition to a normal damper. ) To prevent water droplets from entering the magnetic circuit
system and the like. For example, in the case of a ship speaker having a cone-shaped diaphragm,
the inner peripheral edge portion of the waterproof damper is fixed to a support member
disposed on the central axis of the ship speaker, and the outer peripheral edge portion is the
release of the diaphragm. It is fixed to the sound surface via an adhesive. Thus, water droplets
and the like are prevented from entering the magnetic circuit system and the like.
[0004]
There is known a speaker having a structure in which a dustproof damper is provided in addition
to a normal damper, and the outer peripheral edge portion of the dustproof damper and a coneshaped diaphragm are adhered by an adhesive (for example, Patent Document 1 and 2).
[0005]
The outer peripheral edge of the waterproof damper is fixed to the diaphragm, but the
diaphragm vibrates during reproduction of the sound from the speaker device, so sufficient
adhesive strength is required between the outer peripheral edge of the waterproof damper and
the diaphragm Be done.
However, when the waterproof damper is adhered to the diaphragm by the adhesive, the outer
peripheral portion of the waterproof damper may be damaged by the solvent of the adhesive and
the strength may be reduced. In addition, since water droplets and the like often intrude into the
ship speaker, the bonding portion may swell due to the water and the strength may be reduced.
04-05-2019
2
For this reason, at the time of reproduction | regeneration of a sound etc., the malfunction that
the outer peripheral part of a waterproof damper peeled from a diaphragm might arise.
[0006]
JP-A-8-149589 JP-A-8-163692
[0007]
As problems to be solved by the present invention, the above-mentioned ones can be mentioned
as an example.
An object of the present invention is to provide a speaker device capable of stably attaching a
waterproof damper to a diaphragm with sufficient strength.
[0008]
The invention according to claim 1 is a speaker device, wherein a support member disposed on a
central axis of the speaker device, a diaphragm provided on an outer periphery of the support
member, and an inner peripheral edge portion is the diaphragm The damper is further fixed to
the support member on the side of the sound emission surface, and has an outer peripheral end
fixed to the diaphragm. The damper is erected on the outer side of the fixed position with respect
to the diaphragm to the sound emission side It is characterized by having a folded portion.
[0009]
According to a preferred embodiment of the present invention, a speaker device includes a
support member disposed on a central axis of the speaker device, a diaphragm provided on an
outer periphery of the support member, and an inner peripheral edge portion is the diaphragm
The damper is further fixed to the support member on the side of the sound emission surface,
and has an outer peripheral edge portion fixed to the diaphragm. The damper is on the outer side
of the fixed position with respect to the diaphragm to the sound emission side It has a folded
back portion that stands up.
[0010]
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3
In the above speaker device, the support member is disposed on the central axis, the diaphragm
is provided on the outer periphery of the support member, and the damper is provided on the
diaphragm.
In a preferred example, the damper is waterproof.
The inner peripheral edge portion of the damper is fixed to the support member on the sound
emitting surface side of the diaphragm, and the outer peripheral edge portion is fixed to the
diaphragm. Here, the damper has a turn-up portion rising from the top of the diaphragm to the
sound output side on the outer peripheral side of the fixed position with respect to the
diaphragm. By forming the folded portion at the outer peripheral end of the damper, the strength
of the damper itself at the outer peripheral edge is increased, so that the strength of the fixed
portion between the damper and the diaphragm can be sufficiently ensured and the vibration
system is unnecessary. Vibration can also be suppressed.
[0011]
In one aspect of the above speaker device, the damper is bonded to the diaphragm at a fixed
position on the inner peripheral side of the turnback portion. In this case, it is possible to prevent
deformation of the outer peripheral portion of the damper by melting or softening the damper
with the adhesive in the assembly step of bonding the damper with the adhesive at the folded
portion.
[0012]
In a preferred example of the above speaker device, the frame includes the frame for holding the
support member, and another damper having an inner peripheral edge fixed to a member of the
vibration system and an outer peripheral end fixed to the frame. In this aspect, in addition to the
waterproof damper, a normal damper fixed to a member of a vibration system such as a voice
coil bobbin and a frame is provided.
[0013]
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4
Hereinafter, preferred embodiments of the present invention will be described with reference to
the drawings. In this embodiment, by forming a folded portion at the outer peripheral edge of the
waterproof damper, deformation (swelling) by the solvent of the adhesive or the like is
suppressed or prevented when the outer peripheral edge and the diaphragm are adhered. .
[0014]
[Configuration of Speaker Device] First, FIG. 1 schematically shows a schematic configuration of a
speaker device 100 according to an embodiment of the present invention. FIG. 1A shows a crosssectional view when a plane including the central axis of the speaker device 100 is cut. FIG. 1 (b)
shows a rear view of the speaker device 100. In addition, the speaker apparatus 100 of a present
Example can be used suitably as a speaker for ships. Hereinafter, the configuration and the like of
the speaker device 100 according to the present embodiment will be described with reference to
FIGS. 1 (a) and 1 (b).
[0015]
The speaker device 100 includes a speaker unit 50 for bass reproduction, a speaker unit 51 for
treble reproduction, and various other members. The speaker device 100 is a so-called coaxial
(coaxial) two-way speaker, in which a speaker unit 51 for high-pitched sound reproduction is
disposed on the sound output side and a speaker unit 50 for bass sound reproduction is coaxially
disposed on the back side. Configured Therefore, the speaker device 100 can realize flat sound
reproduction from the low band to the high band. In addition, the speaker unit 50 for bass
reproduction may be a speaker unit capable of bass and medium sound reproduction. Further,
the high sound reproduction speaker unit 51 may be a speaker unit capable of high and medium
sound reproduction.
[0016]
First, the configuration of the speaker unit 50 for bass reproduction will be described. The
speaker unit 50 for bass reproduction mainly includes a vibration system 10 having a diaphragm
1, a damper 2, a waterproof damper 22, a voice coil bobbin 3, a voice coil 4 and a resin frame 5,
a pole piece 6, an annular magnet 7, And a magnetic circuit system 11 having an annular plate 8
and a resin grille 21.
04-05-2019
5
[0017]
First, each component of the vibration system 10 will be described.
[0018]
The diaphragm 1 is a so-called cone-shaped diaphragm, and is bonded to a separate edge portion
1a or formed integrally with the edge portion 1a.
Various materials such as paper-based, polymer-based, and metal-based can be applied to the
diaphragm 1 in accordance with various applications. The outer peripheral edge portion of the
diaphragm 1, that is, the lower end portion of the edge portion 1 a is fixed on the first flange
portion 5 a located at the upper portion of the resin frame 5. On the other hand, the inner
peripheral edge portion of the diaphragm 1 is fixed in the vicinity of the upper end of the outer
peripheral wall of the voice coil bobbin 3.
[0019]
The damper 2 is made of a material such as cloth impregnated with a thermosetting resin such as
phenol resin, and a plurality of wave shapes are formed concentrically. The damper 2 movably
supports the voice coil bobbin 3. The inner peripheral edge portion of the damper 2 is fixed to
the outer peripheral wall of the voice coil bobbin 3. On the other hand, the outer peripheral edge
portion of the damper 2 is fixed on the second flange portion 5 b formed in the vicinity of the
central portion of the resin frame 5.
[0020]
The waterproof damper 22 functions to prevent water droplets and the like from entering the
magnetic circuit system 11 and the like from the sound output side. For this reason, as a material
of the waterproof damper 22, materials, such as a thermoplastic elastomer, are suitable, for
example. An outer peripheral edge portion of the waterproof damper 22 is attached to a
predetermined position of the diaphragm 1, and an inner peripheral edge portion of the
waterproof damper 22 is attached to an outer peripheral wall of a connecting portion 40b of a
support member 40 described later.
04-05-2019
6
[0021]
The voice coil bobbin 3 has a substantially cylindrical shape. The voice coil 4 is wound around
the outer peripheral wall of the lower end portion of the voice coil bobbin 3. Further, the outer
peripheral wall of the lower end portion of the voice coil bobbin 3 is opposed to the inner
peripheral wall of the annular plate 8 at a predetermined interval. Furthermore, the inner
peripheral wall of the lower end portion of the voice coil bobbin 3 is opposed to the outer
peripheral wall of the upper end portion of the pole piece 6 at a constant distance. An air gap
(magnetic gap 33) is formed between the outer peripheral wall of the upper end portion of the
pole piece 6 and the inner peripheral wall of the plate 8.
[0022]
The voice coil 4 has a plus / minus lead terminal (not shown). The plus side lead terminal is an
input terminal of the L (or R) channel signal, and the minus side lead terminal is an input
terminal of a ground (GND: ground) signal. Each lead terminal is electrically connected to one end
of each tinsel wire 9 at a predetermined position of the diaphragm 1, and the other end of each
tinsel wire 9 is electrically connected to the connection terminal 32. An electrical signal for one
channel is input to the voice coil 4 from the side of the amplifier (not shown) via the connection
terminal 32 and the tinsel wire 9.
[0023]
The resin frame 5 is a frame made of a resin material. Various components of the speaker device
100 are fixed to the resin frame 5 and serve to support the speaker device 100. The resin frame
5 has a pot-like or pot-like shape opened upward, and a first flange 5 a supporting the edge 1 a
of the diaphragm 1 and a second flange supporting the outer peripheral edge of the damper 2. It
has the part 5b and the mounting part 5c in which the magnetic circuit system 11 is mounted.
[0024]
The first flange portion 5 a is formed at the upper position of the resin frame 5, and the second
04-05-2019
7
flange portion 5 b is formed at the central portion of the resin frame 5. The mounting portion 5 c
is formed at the lower side of the resin frame 5, that is, at the position on the back side. In the
vicinity of the central axis of the mounting portion 5c, a truncated cone-shaped depression is
formed from the lower surface side to the upper surface side. The placement unit 5c has an
opening 5d on its central axis, a step 5j and a hole 5k near its periphery, and a recess 5e and a
slit 5m on its back side. The step 5j, the hole 5k, the recess 5e, and the slit 5m generate bubbles
of the adhesive 60 due to a volume change in the space between the magnetic circuit system 11
and the resin frame 5 when assembling the speaker unit 50 for bass reproduction Play the role
of preventing. A fixing member 41 described later passes through the opening 5d, and a name
plate 42 described later is attached to the recess 5e. The name plate 42 is used to improve the
appearance of the rear side of the speaker device 100 or to make the user aware of product
information and the like.
[0025]
Next, each component of the magnetic circuit system 11 will be described.
[0026]
The magnetic circuit system 11 is configured as an external magnet type magnetic circuit system.
The magnetic circuit comprises a pole piece 6, an annular magnet 7 and an annular plate 8.
[0027]
The pole piece 6 has a substantially inverted T-like shape in cross section. The pole piece 6 is
fixed on the mounting portion 5 c of the resin frame 5 via an adhesive 60. The pole piece 6 has a
flange-like yoke 6a, a cylindrical center pole 6b, and openings 6c and 6d provided in the center
pole 6b.
[0028]
The yoke 6 a is disposed on the mounting portion 5 c of the resin frame 5. A truncated cone
04-05-2019
8
shaped recess is formed in the vicinity of the central axis on the lower surface side of the center
pole 6b. The openings 6c and 6d formed in the center pole 6b are each different in diameter, and
the openings are open. The opening 6c is slightly larger in diameter than the opening 6d, and is
formed from the vicinity of the central portion of the center pole 6b to the upper portion thereof.
On the other hand, the opening 6d is formed from the lower end side of the opening 6c, that is,
from the central portion side to the lower portion of the center pole 6b. Further, a lower end
portion 40 bc of a support member 40 described later is inserted into the opening 6 c, and the
support member 40 is fixed to the center pole 6 b. Further, the fixing member 41 penetrates
through the openings 6c and 6d. The fixing member 41 penetrates through the opening 6 c
through a through hole 40 bb of the support member 40 described later.
[0029]
An annular magnet 7 is disposed to overlap the upper surface of the yoke 6 a, and an annular
plate 8 is disposed to overlap the upper surface of the magnet 7. The center pole 6 b extends
upward in the opening of the central portion of the annular magnet 7 and the plate 8. The outer
peripheral edge of the plate 8 is fixed to the inner peripheral wall of the resin frame 5 via an
adhesive 60 for reinforcement.
[0030]
In the magnetic circuit system 11, the magnet 7, the plate 8 and the pole piece 6 constitute a
magnetic circuit, and the magnetic gap 33 of the magnet 7 is transmitted to the magnetic gap 33
formed between the inner peripheral wall of the plate 8 and the outer peripheral wall of the pole
piece 6. I am concentrating.
[0031]
The resin grille 21 is made of, for example, a resin material, and has a speaker unit 50 for bass
reproduction and a function of protecting a speaker unit 51 for treble reproduction.
For this reason, the resin grille 21 is attached to the resin frame 5 so as to cover them. Further,
on the upper surface side of the resin grille 21, stripe-shaped gaps (not shown) are intermittently
formed, and the speaker unit 50 for bass reproduction and the speaker unit 51 for high-pitched
reproduction are on the sound output side through the gaps. It is possible to emit sound waves.
04-05-2019
9
[0032]
Next, the high sound reproduction speaker unit 51 will be described. The speaker unit 51 for
high-pitched sound reproduction mainly includes a vibration system 30 having a diaphragm 61,
a voice coil 14, and an upper frame 15, a magnetic piece 31 having a pole piece 16, an annular
magnet 17, and an annular plate 18. And a cover 23.
[0033]
First, each component of the vibration system 30 will be described.
[0034]
The diaphragm 61 is a so-called dome-shaped diaphragm, and is integrally formed with the edge
portion 61a.
Similar to the above-described diaphragm 1, the diaphragm 61 may be made of various materials
such as paper, polymer, and metal depending on various applications. The outer peripheral edge
portion of the diaphragm 61, that is, the lower surface of the outer peripheral edge portion of the
edge portion 61 a is fixed to the upper surface of the resin frame 15.
[0035]
The voice coil 14 has a substantially cylindrical shape. The outer peripheral wall of the voice coil
14 is opposed to the inner peripheral wall of the annular plate 18 at a constant distance. On the
other hand, the inner peripheral wall of the voice coil 14 is opposed to the outer peripheral wall
of the upper end portion of the pole piece 16 at a constant distance. An air gap (magnetic gap
34) is formed between the outer peripheral wall of the pole piece 16 and the inner peripheral
wall of the plate 18.
[0036]
04-05-2019
10
Also, the voice coil 14 has positive / negative lead terminals (not shown). The plus side lead
terminal is an input terminal of the L (or R) channel signal, and the minus side lead terminal is an
input terminal of a ground (GND: ground) signal. Each lead terminal is electrically connected to
one end of each tinsel wire not shown, and the other end of each tinsel wire not shown is
electrically connected to a connection terminal not shown. An electric signal for one channel is
input to the voice coil 14 from the side of the amplifier (not shown) through the connection
terminal and the tinsel wire.
[0037]
The upper frame 15 is made of a resin material and has a substantially annular shape. The upper
frame 15 is disposed to overlap the upper surface of the annular plate 18. The upper frame 15
supports the outer peripheral edge portion of the diaphragm 61, that is, the edge 61a.
[0038]
Next, each component of the magnetic circuit system 31 will be described.
[0039]
The magnetic circuit system 31 is configured as an external magnet type magnetic circuit system.
The magnetic circuit comprises a pole piece 16, an annular magnet 17 and an annular plate 18.
[0040]
The pole piece 16 has a substantially inverted T-like shape in cross section. Flatness is ensured
on the lower surface of the pole piece 16. The pole piece 16 is fixed to the upper end surface 40
ba of the support member 40 via an adhesive 60 (not shown). The pole piece 16 has a flange-like
yoke 16a, a cylindrical center pole 16b, a fixing hole 16c provided in the center pole 16b, an
outer peripheral wall of the lower end of the center pole 16b, and the yoke 16a. And a step 16d
having a step-like cross section.
04-05-2019
11
[0041]
The yoke 16 a is disposed on the upper end surface 40 ba of the support member 40. A
truncated cone shaped recess is formed in the vicinity of the central axis on the lower surface
side of the center pole 16b. The fixing hole 16 c is, for example, a female screw, and the distal
end (e.g., male screw) of the fixing member 41 is inserted and screwed. The outer peripheral wall
of the step 16 d is in contact with the outer peripheral wall of the lower end portion of the
magnet 17.
[0042]
The annular magnet 17 is disposed so as to overlap the upper surface of the yoke 16a. The inner
peripheral wall of the lower end portion of the annular magnet 17 is disposed on the outer
peripheral side of the step 16 d of the pole piece 16 as described above, and the annular magnet
17 is accurately positioned at a predetermined position on the yoke 16 a. An annular plate 18 is
disposed to overlap the upper surface of the magnet 17.
[0043]
In the magnetic circuit system 31, the magnet 17, the plate 18, and the pole piece 16 form a
magnetic circuit, and the magnetic gap 34 formed between the inner peripheral wall of the plate
18 and the outer peripheral wall of the pole piece 16 I am concentrating.
[0044]
The cover 23 is made of, for example, a resin material, is attached to a frame portion 40 a of a
support member 40 described later, and covers the sound output side of the high sound
reproduction speaker unit 51.
The cover 23 has a function of protecting the speaker unit 51 for high-pitched sound
reproduction.
[0045]
04-05-2019
12
As various other members of the speaker device 100, a support member 40, a fixing member 41,
and a name plate 42 can be mentioned.
[0046]
The support member 40 has a cylindrical connecting portion 40b and a frame portion 40a
extending upward from the upper end surface 40ba of the connecting portion 40b so as to cover
the periphery of the high-sound reproduction speaker unit 51. Have.
A cover 23 is attached to the frame portion 40a, and a speaker unit 51 for high-pitched sound
reproduction is covered. The connecting portion 40 b coaxially arranges the speaker unit 50 for
bass reproduction and the speaker unit 51 for treble reproduction. The lower end 40 bc of the
connecting portion 40 b is fixed in a state of being inserted into the opening 6 c of the pole piece
6 as described above. A speaker unit 51 for high-pitched sound reproduction is fixed to the
upper end surface 40 ba of which flatness is ensured, via an adhesive 60 (not shown). In the
connecting portion 40b, a through hole 40bb penetrating in the vertical direction on the central
axis is formed, and the fixing member 41 penetrates the through hole 40bb.
[0047]
As the fixing member 41, for example, a member such as an external screw or a bolt is suitable.
At the tip of the fixing member 41, an external thread corresponding to the internal thread of the
fixing hole 16c is formed. The fixing member 41 is inserted into the fixing hole 16c from the rear
surface side of the speaker device 100 so as to communicate with the openings 5d, 6d and 6c
and the through hole 40bb. Thereby, the speaker unit 50 for bass reproduction and the speaker
unit 51 for treble reproduction are coaxially fixed via the support member 40.
[0048]
The name plate 42 is made of a polymer material, a metal material, or the like, and has a disk
shape. As described above, the name plate 42 is attached to the recess 5 e of the resin frame 5
with an adhesive or an adhesive. Product information, a company name and the like are printed
on the name plate 42.
04-05-2019
13
[0049]
In the speaker device 100 described above, when an electric signal is input to each tinsel wire
from the amplifier side, the electric signal is supplied to the voice coils 4 and 14 through the lead
terminals of the voice coils 4 and 14. . As a result, driving force is generated in the voice coils 4
and 14 in the magnetic gaps 33 and 34, and the diaphragms 1 and 61 are vibrated in the axial
direction of the speaker device 100. Thus, the speaker device 100 emits a sound wave to the
sound emission side.
[0050]
[Structure of Waterproof Damper] Next, with reference to FIGS. 1 and 2, the structure of the
waterproof damper 22 as a feature of the present invention will be described. FIG. 2 shows an
enlarged cross-sectional view of a cut surface passing through the diameter of the disk-shaped
waterproof damper 22.
[0051]
As shown in FIG. 2, the waterproof damper 22 has an outer peripheral edge 22a, an elastic part
22b, and an inner peripheral edge 22c. Further, the outer peripheral edge portion 22a has a fixed
portion 22ab and a folded back portion 22ac.
[0052]
The fixing portion 22ab is provided between the folded portion 22ac and the elastic portion 22b,
and is fixed to the sound emitting surface of the diaphragm 1 by the adhesive 60. The folded
portion 22ac extends in the outer peripheral direction from one end of the fixed portion 22ab,
and is folded upward. With the waterproof damper 22 fixed to the diaphragm 1, the folded back
portion 22 ac stands upright on the sound emitting surface side of the speaker device 100.
[0053]
04-05-2019
14
The elastic portion 22 b has a wave shape in cross section, and expands and contracts in the axial
direction of the speaker device 100 together with the diaphragm 1 at the time of sound
reproduction. The inner peripheral edge portion 22c extends in the inner circumferential
direction from one end of the elastic portion 22b, and is fixed to the outer peripheral wall located
above the connecting portion 40b of the support member 40 by an adhesive.
[0054]
In the speaker device 100 having the waterproof damper 22 having such a structure, even if
water droplets intrude into the diaphragm 1 through the gap of the resin grille 21, the water
droplets are blocked by the waterproof damper 22 and the water droplets are blocked to the
magnetic circuit system 11 side. There is no intrusion.
[0055]
Next, with reference to FIG. 3, a unique effect and the like of the waterproof damper 22 which is
a feature of the present invention will be described.
In the following, for convenience of explanation, a description will be given while comparing a
normal waterproof damper 70 in which no folds are formed in the outer peripheral edge portion
and the waterproof damper 22 according to the present embodiment. FIG. 3B shows an enlarged
cross-sectional view of a region E6 (a region surrounded by a broken line) in FIG. On the other
hand, FIG. 3 (a) shows an enlarged cross-sectional view of a region of a normal waterproof
damper 70 corresponding to FIG. 3 (b). Moreover, FIG. 3 (a) and (b) is for demonstrating the
structure which the outer-periphery edge part of a waterproof damper corrodes / swells with a
solvent.
[0056]
First, prior to describing the functions and effects of the ordinary waterproof damper 70 and the
waterproof damper 22, differences in their structures will be described. As understood with
reference to FIGS. 3 (a) and 3 (b), when comparing the ordinary waterproof damper 70 with the
waterproof damper 22 of the embodiment, the outer peripheral edge 70a of the ordinary
waterproof damper 70 has a folded portion Is not formed. In the normal waterproof damper 70,
the outer peripheral edge 70 a is fixed to the sound emitting surface of the diaphragm 1 via the
04-05-2019
15
adhesive 60. On the other hand, in the waterproof damper 22 of the embodiment, the fixing
portion 22ab which is a component of the outer peripheral edge portion 22a is fixed to the
sound emitting surface of the diaphragm 1 via the adhesive 60, Is provided.
[0057]
The outer peripheral edge 70 a of the waterproof damper 70 and the outer peripheral edge 22 a
of the waterproof damper 22 are fixed to the diaphragm 1 by the adhesive 60 respectively. The
waterproof damper 70 is, for example, a member that is deformed by a solvent component
contained in the adhesive 60 such as an elastomer. For this reason, in the prior art of FIG. 3 (a),
when the outer peripheral edge portion 70a is bonded, the waterproof damper 70 is deformed by
the solvent component of the adhesive and the bonding is not performed properly.
[0058]
On the other hand, as shown in FIG. 3B, in the embodiment of the present invention, since the
folded back portion 22ac is formed outside the adhesive surface (fixed portion) 22ab, the
deformation of the adhesive surface 22ab is suppressed or prevented. be able to.
[0059]
In addition, since the folded back portion 22ac is formed as a part of the waterproof damper 22,
forming the folded back portion 22ac does not increase the manufacturing cost of the waterproof
damper 22.
[0060]
[Modification] In the above embodiment, the waterproof damper 22 of the present invention is
applied to the coaxial speaker device 100. However, the present invention is not limited to this.
Of course it is possible to apply
The present invention can also be applied to an on-vehicle speaker device.
[0061]
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16
The structure of the speaker apparatus based on the Example of this invention is shown as
sectional drawing and a rear view.
The expanded sectional view of the waterproof damper which concerns on a present Example is
shown. It is an expanded sectional view explaining structure and an operation of the perimeter
edge part of a usual waterproofing damper and a waterproofing damper concerning this
example.
Explanation of sign
[0062]
DESCRIPTION OF SYMBOLS 1 diaphragm 21 resin grille 22 waterproof damper 22a outer
periphery 22ab fixed part 22ac folded part 22b elastic part 22c inner periphery 60 adhesive 50,
51 speaker unit 100 speaker device
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