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JP2005348031

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DESCRIPTION JP2005348031
PROBLEM TO BE SOLVED: To provide a speaker capable of reducing the number of parts and
simplifying the manufacturing process while enabling thinning. SOLUTION: A plate-like frame 1,
a conical diaphragm 4, a magnetic circuit 9 attached to the frame 1 and disposed on the front
side of the diaphragm 4, and driven by the magnetic circuit 9. A voice coil 6 in which the bobbin
6A is attached to the diaphragm 4 and a damper 5 in which the rising portion 5A is formed and
the movable portion is attached to the diaphragm 4; 5A is attached to the frame 1 via a gasket or
a damper ring. [Selected figure] Figure 1
スピーカ
[0001]
The present invention relates to a thin speaker.
[0002]
In the case of incorporating a speaker into a thinned device, a thin speaker is also required.
In particular, when the device is a flat-screen television using a liquid crystal panel or the like, the
thickness of the flat-screen television also becomes necessarily thin. When incorporating a
speaker into such a thin device, a particularly thin speaker is necessary. As such a thin speaker,
there is one having a structure in which a magnetic circuit is disposed on the front side of a
diaphragm (Patent Document 1). Japanese Patent Application Laid-Open No. 62-136196
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1
[0003]
The conventional speaker has the following problems. In the speaker described in Patent
Document 1, as shown in FIG. 3, the first frame 101 is provided on the front side of the
diaphragm 110, and the magnetic circuit 120 is attached to the first frame 101. Further, a
concave second frame 102 is provided on the rear surface side of the diaphragm 110, and the
damper 130 is attached to the second frame 102. Then, the second frame 102 is fixed to the first
frame 101. Also, in the conventional speaker, the diaphragm 110 and the damper 130 are
attached to the voice coil 140.
[0004]
With such a structure, in the conventional speaker, it is necessary to increase the distance a in
order to avoid contact between the diaphragm 110 and the yoke 121 of the magnetic circuit 120
due to the amplitude of the diaphragm 110. Moreover, in order to fix the diaphragm 110 and the
damper 130 to the voice coil 140, the thickness b is required. Therefore, in the conventional
speaker, since the distance a is increased and the thickness b is required, the speaker becomes
thicker by these amounts.
[0005]
Further, the conventional speaker requires two frames (first and second frames 101 and 102),
the number of parts is large, and the manufacturing process is complicated. Furthermore, in the
conventional speaker, since the terminal 150 is attached to the side surface of the second frame
102, the damper 130 approaches, but the terminal 150 can not be extended for thinning the
speaker Manufacturing process is not easy.
[0006]
It is an object of the present invention to provide a speaker which solves the above-mentioned
problems, enables thinning and reduces the number of parts and simplifies the manufacturing
process.
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2
[0007]
In order to solve the above problems, the invention according to claim 1 is driven by the conicalshaped diaphragm, the magnetic circuit disposed on the front side of the diaphragm, and the
magnetic circuit, and the bobbin is vibrated. It is a speaker characterized by having a voice coil
attached to a board, and a damper in which a movable part is attached to the diaphragm.
According to the invention of claim 2, a plate-like frame, a conical diaphragm, a magnetic circuit
attached to the frame and disposed on the front side of the diaphragm, and driven by the
magnetic circuit A voice coil having a bobbin attached to the diaphragm, and a damper having a
rising portion and a movable portion attached to the diaphragm; the rising portion of the damper
is a gasket or a damper It is a speaker characterized by being attached to the above-mentioned
frame via a ring. The invention according to claim 3 is characterized in that, in the speaker
according to claim 1 or 2, the diaphragm has a flat portion which faces the yoke of the magnetic
circuit.
[0008]
According to the present invention, since the damper is attached to the diaphragm and the voice
coil is attached to the diaphragm, the shape of the speaker can be thinned by the amount of
attachment of the damper to the voice coil. Further, since the rising portion is provided on the
damper and the rising portion is attached to the frame through the gasket, the conventional
frame can be eliminated and the number of parts can be reduced. Furthermore, since the flat
portion is provided in the portion of the diaphragm facing the tip of the yoke, the speaker can be
made thin while securing the amplitude distance and the reproduction band.
[0009]
Next, the best mode for carrying out the present invention will be described with reference to the
drawings. FIG. 1 is a cross-sectional view showing the speaker according to the present
embodiment, and FIG. 2 is a cross-sectional view showing the speaker of FIG. 1 in an exploded
state. In addition, in FIG. 2, in order to avoid the complication of drawing, description of the line
showing the connection of the member is abbreviate | omitted. The speaker according to the
present embodiment is provided with a frame 1 having a planar shape. The frame 1 has a
plurality of openings 1A and screw holes 1B. In the frame 1, an annular first recess 1 </ b> C is
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3
provided on the end side, and an annular second recess 1 </ b> D is provided on the center side.
Furthermore, in the frame 1, two insertion holes 1E are opened.
[0010]
One end face of a cylindrical gasket 2 is attached to the first recess 1 </ b> C of the frame 1. The
insertion hole 2A is opened on the side surface of the gasket 2, and the terminal 3 is attached by
the insertion hole 2A.
[0011]
The diaphragm 4 has a conical shape, and a support 4 A of the diaphragm 4 is attached to the
other end face of the gasket 2. In addition, a flat portion 4B is formed on the edge of the tip
portion of the conical diaphragm 4. The width m of the flat portion 4B is wider than the thickness
n of the yoke 9A of the magnetic circuit 9 described later. Thereby, when the diaphragm 4
vibrates, the flat portion 4B can move to the tip of the yoke 9A, and in the speaker according to
the present embodiment, only the height p of the conventional extension portion 4C (FIG. 2) It
can be made thinner.
[0012]
A damper 5 is attached to the other end face of the gasket 2 via a support 4 A of the diaphragm
4. A rising portion 5A is formed on the peripheral edge of the damper 5, and the peripheral edge
of the rising portion 5A is bent in an L-shape to form a flange portion 5B. The flange 5B is
attached to the gasket 2 as described above. Since the movable portion that is the inner
peripheral edge of the damper 5 is attached to the flat portion 4B of the diaphragm 4 described
above, the damper 5 holds the diaphragm 4 in the speaker according to the present embodiment.
.
[0013]
The bobbin 6A of the voice coil 6 is attached to the periphery of the flat portion 4B of the
diaphragm 4. One end of the bobbin 6A is closed by a cap 7, and the other end is wound with a
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4
coil portion 6B. The coil portion 6 B is electrically connected to the terminal 3. That is, the lead
wire 8 connected to the terminal 3 is fixed through the insertion hole 1E of the frame 1. Further,
the lead wire 8 is fixed to the diaphragm 4 and connected to the lead wire of the coil portion 6 B
of the voice coil 6. In the loudspeaker according to the present embodiment, the voice coil 6 is
disposed on the front side of the diaphragm 4 and is supported by the damper 5 via the
diaphragm 4.
[0014]
On the other hand, a magnetic circuit 9 is attached to the second recess 1 D of the frame 1. The
magnetic circuit 9 comprises a yoke 9A, a magnet 9B and a pole 9C. The yoke 9A is a cylinder
whose one end is closed, and the bottom of the yoke 9A is fixed to the frame 1 by a screw 1F
passing through a screw hole 1B of the frame 1. The magnet 9B and the pole 9C are mounted in
the yoke 9A, and a gap is formed between the yoke 9A and the magnet 9B and the pole 9C. The
coil portion 6B of the voice coil 6 described above is inserted into this gap.
[0015]
The speaker according to the present embodiment has the above-described configuration.
According to this configuration, since the flat portion 4B is provided on the diaphragm 4 facing
the tip of the yoke 9A, the shape of the speaker can be thinned by the height p while securing the
amplitude distance and the reproduction band. .
[0016]
Further, according to this configuration, since the damper 5 is attached to the diaphragm 4 and
the voice coil 6 is attached to the diaphragm 4, only the attachment of the damper 5 to the voice
coil 6, which is necessary for the conventional speaker , The shape of the speaker can be thin.
[0017]
Further, according to this configuration, since the rising portion 5A is provided in the damper 5
and the rising portion 5A is attached to the frame 1 via the gasket 2, the conventional frame can
be eliminated and the number of parts can be reduced. be able to.
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5
This can simplify the speaker manufacturing process.
[0018]
Furthermore, according to this configuration, by attaching the terminal 3 to the gasket 2 (damper
ring), the terminal 3 can be extended and wiring can be easily performed from the rear surface of
the speaker in a small space.
[0019]
As mentioned above, although the embodiment of this invention has been described in detail, the
specific configuration is not limited to this embodiment, and even if there is a change in design
etc. within the scope of the present invention, included.
[0020]
1 is a cross-sectional view of a loudspeaker according to an embodiment of the present invention.
It is sectional drawing which shows a mode that the speaker of FIG. 1 was decomposed |
disassembled.
It is sectional drawing which shows the conventional speaker.
Explanation of sign
[0021]
DESCRIPTION OF SYMBOLS 1 frame 1A opening 1B screw hole 1C 1st recessed part 1D 2nd
recessed part 1E insertion hole 1F screw 2 gasket 2A insertion hole 3 terminal 4 diaphragm 4A
support material 4B flat part 4C extension part 5 damper 5A rising part 5B flange part 6 Voice
coil 6A bobbin 6B coil part 7 cap 8 lead wire 9 magnetic circuit 9A yoke 9B magnet 9C pole
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