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DESCRIPTION JP2010098490

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DESCRIPTION JP2010098490
An object of the present invention is to provide a speaker in which the damper is prevented from
coming off the voice coil bobbin while maintaining the performance of the damper and the voice
coil bobbin. A speaker according to the present invention includes a voice coil bobbin 8 and a
first projecting portion 13 projecting perpendicularly from an inner circumferential portion to an
outer diameter direction, and the voice coil bobbin is provided on the inner circumferential
portion of the projecting portion 13 A damper 10 to which the outer peripheral portion of 8 is
connected, and a reinforcing portion 14 which is connected to at least the outer peripheral
portion of the voice coil bobbin 8 and the first projecting portion 13 to cover the first projecting
portion 13 It features. [Selected figure] Figure 2
スピーカ
[0001]
The present invention relates to a speaker to which a damper and a voice coil are attached.
[0002]
In a conventional speaker, a damper is insert-molded on a voice coil bobbin (see, for example,
Patent Document 1).
Moreover, the voice coil bobbin type damper which integrally molded the damper and the voice
coil bobbin is provided (for example, refer patent document 2). JP-A-63-164800 JP-A-8-102993
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1
[0003]
However, in Patent Document 1, even when the damper is simply insert-molded on the voice coil
bobbin, there is a problem that the damper is detached from the voice coil bobbin when a force is
applied to pull the damper in the outer diameter direction. Further, in Patent Document 1, when
trying to increase the strength, the voice coil bobbin must be thick and heavy, and the sound
pressure is reduced. On the other hand, in Patent Document 2, when providing a voice coil
bobbin type damper in which a damper and a voice coil bobbin are integrally formed of the same
material, it is difficult to achieve both the elastic force required for the damper and the hardness
required for the voice coil bobbin. There was a problem. Therefore, it was difficult to achieve
both the performance of the damper and the voice coil bobbin.
[0004]
An object of the present invention is to provide a speaker that prevents the damper from coming
off the voice coil bobbin without reducing the sound pressure while maintaining the performance
of the damper and the voice coil bobbin.
[0005]
A speaker according to one aspect of the present invention includes a frame, a magnetic circuit
unit coupled to the frame, a voice coil disposed in a magnetic gap of the magnetic circuit unit,
and a voice coil bobbin around which the voice coil is wound. And a diaphragm which has an
inner peripheral portion coupled to the voice coil bobbin and an outer peripheral portion coupled
to the frame, and vibrates by a driving force generated from the magnetic circuit portion and the
voice coil; Damper having a first protrusion projecting vertically and having an outer periphery
of the voice coil bobbin coupled to an inner periphery of the first protrusion, and at least an
outer periphery of the voice coil bobbin and the first protrusion And a first reinforcing portion
coupled to the outer peripheral portion to cover the first projecting portion.
[0006]
According to the present invention, it is possible to provide a speaker in which the damper is
prevented from coming off the voice coil bobbin without reducing the sound pressure while
maintaining the performance of the damper and the voice coil bobbin.
[0007]
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2
Embodiment 1 Hereinafter, the best mode for carrying out the present invention will be
described using the drawings.
[0008]
FIG. 1 is a half sectional view of a speaker according to a first embodiment of the present
invention.
As shown in FIG. 1, the magnetic circuit unit 1 includes a yoke 2, a magnet 3, and a plate 4.
The magnetic circuit unit 1 is coupled to the frame 5.
The peripheral portion of the frame 5 is fixed to the outer peripheral portion of the edge 6.
A diaphragm 7 is attached to the inner peripheral portion of the edge 6. A voice coil bobbin 8 is
coupled to the inner peripheral portion of the diaphragm 7. The voice coil 9 is wound around the
lower portion of the side surface of the voice coil bobbin 8. Further, the side surface of the voice
coil bobbin 8 is supported by a damper 10. The voice coil 9 wound around the lower portion of
the voice coil bobbin 8 is embedded in the magnetic gap of the magnetic circuit unit 1. A dust
cap 11 is attached to the upper surface of the central portion of the diaphragm 7.
[0009]
The voice coil bobbin 8 is made of polyimide, aluminum, kraft paper or the like. Further, the
damper 10 is made of an elastic body which is a material different from the voice coil bobbin 8.
For example, it is composed of a thermoplastic elastomer or rubber.
[0010]
FIG. 2 is an enlarged view of a portion where the side surface of the voice coil bobbin 8 and the
damper 10 in FIG. 1 are coupled. As shown in FIG. 2, the inner peripheral portion of the cone
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3
neck 12 which is the inner peripheral portion of the diaphragm 7 is coupled to the upper end of
the outer peripheral portion of the voice coil bobbin 8. The damper 10 has a first projecting
portion 13 in which the inner peripheral portion protrudes perpendicularly to the outer diameter
direction of the damper 10. The damper 10 is insert-molded through the first protrusion 13 of
the voice coil bobbin 8. As shown in FIG. 2, the first protrusion 13 protrudes up and down, but
may protrude perpendicularly to the paper surface. That is, the first protrusion 13 may have any
shape as long as it protrudes perpendicularly to the outer diameter direction of the damper 10.
[0011]
Further, as shown in FIG. 2, the reinforcing portion 14 is coupled to the outer peripheral portion
of the voice coil bobbin 8 and the outer peripheral portion of the first projecting portion 13 to
cover the first projecting portion 13. The reinforcing portion 14 is made of paper. According to
this material, the coupling force between the reinforcing portion 14 and the voice coil bobbin 8 is
larger than the coupling force between the first projecting portion 13 and the voice coil bobbin 8
which the damper 10 has. Further, when a force to pull the damper 10 in the outer diameter
direction is applied to the damper 10, the outer peripheral portion of the first projecting portion
13 is locked by the inner peripheral portion of the reinforcing portion 14. As described above,
the first projecting portion 13 can be prevented from peeling off from the voice coil bobbin 8.
[0012]
FIG. 3 is an enlarged view of a portion of the voice coil bobbin 8 in FIG. 1 in which the first
projecting portion 13 is not provided on the damper 10 and the reinforcing portion 14 is not
provided. It is. As shown in FIG. 3, the side surface of the voice coil bobbin 8 may have a portion
where the first projecting portion 13 and the reinforcing portion 14 are not coupled and the
inner peripheral portion of the damper 10 is simply coupled. Further, there may be no portion
where the inner peripheral portion of the damper 10 is merely coupled, and all the portions on
the side surface of the voice coil bobbin 8 may be configured as shown in FIG.
[0013]
As shown in FIG. 2, the inner peripheral portion of the first projecting portion 13 provided on the
inner peripheral portion of the damper 10 is coupled to the outer peripheral portion of the voice
coil bobbin 8. Then, at least the outer peripheral portion of the first protrusion 13 is coupled to
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4
the inner peripheral portion of the reinforcing portion 14. Therefore, the reinforcing portion 14
covers the first projecting portion 13. Therefore, even if the damper 10 receives a force to be
pulled in the outer diameter direction, the first protrusion 13 is caught on the side wall of the
reinforcing portion 14 and the damper 10 is locked, so the damper 10 is detached from the voice
coil bobbin 8 Can be prevented. In addition, since the voice coil bobbin 8 and the damper 10 are
not integrally formed of the same material and materials suitable for each are used, the
performance of the voice coil bobbin 8 and the damper 10 can be maintained. Alternatively, a
gold thread may be molded in the damper 10. Thereby, the peeling of the gold wire can be
prevented.
[0014]
Second Embodiment A loudspeaker according to a second embodiment of the present invention
will be described below with reference to the drawings. The same parts as those of the first
embodiment are designated by the same reference numerals, and the description thereof is
omitted.
[0015]
FIG. 4 is an enlarged view of a portion where the side surface of the voice coil bobbin 8 and the
damper 10 are coupled in the second embodiment of the present invention. As shown in FIG. 4,
the reinforcing portion 14 has a first reinforcing portion 14 a and a second reinforcing portion
14 b. The diameter of the first reinforcing portion 14a is larger than the diameter of the second
reinforcing portion 14b. When the first reinforcing portion 14a and the second reinforcing
portion 14b are made of different materials, the first reinforcing portion 14a is selected to be a
material most suitable for coupling to the voice coil bobbin 8, and the second reinforcing portion
14b is selected. In addition, since it is possible to select the most suitable material for coupling to
the damper 10, it is possible to further prevent the separation of the damper 10 and the voice
coil bobbin 8. The first reinforcing portion 14a and the second reinforcing portion 14b can be
one reinforcing portion using the same material.
[0016]
The inner periphery of the first reinforcing portion 14a is connected to the outer periphery of
the voice coil bobbin 8, and the outer periphery is connected to the inner periphery of the second
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reinforcement. In the second reinforcing portion 14 b, a portion of the inner circumferential
portion not connected to the first reinforcing portion 14 a is connected to the first projecting
portion 13. In addition, the damper 10 has a second protrusion 15 that protrudes
perpendicularly to the outer diameter direction of the damper 10 on the outer diameter direction
side with respect to the second reinforcing portion 14 b. A part of the outer peripheral portion of
the second reinforcing portion 14 b is coupled to the inner peripheral portion of the second
projecting portion 15. The second protrusion 15 protrudes up and down, but may protrude
perpendicularly to the paper surface.
[0017]
As shown in FIG. 4, the second reinforcing portion 14 b is sandwiched and fixed by the first
projecting portion 13 and the second projecting portion 15 provided in the damper 10.
Therefore, even if force is applied to the damper 10 in any direction, the first protrusion 13 and
the second protrusion 15 are caught on the side wall of the second reinforcing portion 14 b, and
the damper 10 is locked. . Since the inner peripheral portion and the outer peripheral portion of
the second reinforcing portion 14b are sandwiched and fixed, the fixed positions of the damper
10 and the second reinforcing portion 14b are held without deviation. As a result, the fixed
position of the damper 10 and the voice coil bobbin 8 is also stably held, so that the verticality of
the damper 10 and the voice coil bobbin 8 can be maintained. In addition, it is possible to
prevent the damper 10 from coming off the voice coil bobbin 8.
[0018]
Third Embodiment A loudspeaker according to a third embodiment of the present invention will
be described below with reference to the drawings. The same parts as in the first embodiment
and the second embodiment are denoted by the same reference numerals, and the description
will be omitted.
[0019]
FIG. 5 is an enlarged view of a portion where the side surface of the voice coil bobbin 8 and the
damper 10 are coupled in the third embodiment of the present invention. As shown in FIG. 5, the
inner periphery of the cone neck 12 is coupled to the upper end of the outer periphery of the
voice coil bobbin 8. The second protrusion 15 protrudes to the upper end side of the voice coil
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6
bobbin 8. The second protrusion 15 has a guide portion 16 on which the cone neck 12 is placed
and which is coupled to the outer peripheral portion of the cone neck 12. The inner peripheral
portion of the guide portion 16 covers the outer peripheral portion of the cone neck 12.
[0020]
Thus, the second projecting portion 15 is configured to sandwich and fix the cone neck 12
together with the voice coil bobbin 8. Therefore, the cone neck 12 can be prevented from peeling
off from the voice coil bobbin 8.
[0021]
In addition, the guide part 16 may cover and fix the 1st reinforcement part 14a and the 2nd
reinforcement part 14b which are located above the 1st protrusion part 13, and may be fixed. As
a result, the first reinforcing portion 14 a and the second reinforcing portion 14 b can further fix
the damper 10 to the voice coil bobbin 8, and peeling can be prevented.
[0022]
The speaker of the present invention is useful as an audio device mounted on an AV device,
particularly an on-vehicle device with large vibration.
[0023]
A half-cut view of the speaker according to the first embodiment of the present invention. An
enlarged view in which a portion where the voice coil bobbin and the damper are coupled in FIG.
1 is enlarged. Further, an enlarged view in which a portion connected to the damper is enlarged
at a portion where no reinforcing portion is provided. An enlarged view in which a portion where
the voice coil bobbin and the damper are connected in the second embodiment of the present
invention is enlarged An enlarged view of the portion where the voice coil bobbin and the
damper are connected in
Explanation of sign
[0024]
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DESCRIPTION OF SYMBOLS 1 magnetic circuit part 2 yoke 3 magnet 4 plate 5 frame 6 edge 7
diaphragm 8 voice coil bobbin 9 voice coil 10 damper 11 dust cap 12 cone neck 13 1st
protrusion part 14 reinforcement part 14a 1st reinforcement part 14b 2nd Reinforcement 15
Second projection 16 Guide
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