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DESCRIPTION JPH10285692

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DESCRIPTION JPH10285692
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to
improvement of a speaker damper.
[0002]
2. Description of the Related Art A speaker unit generally used for audio equipment such as
stereo is constructed as shown in FIG. That is, a cylindrical magnet 2 provided with a pole piece 3
made of a magnetic material at its upper end is provided at the center of the bottom of the yoke
1 having a wedge shape, and it is expanded conically at the upper end of the yoke 1 The housing
4 is fixedly provided, and the upper end of the conical diaphragm 6 is connected to the tip of the
housing 4 via the edge 5 formed of an elastic member, and the diaphragm 6 is floated from the
inner wall of the housing It is in the state.
[0003]
A hollow cylindrical voice coil section 7 having a wire 8 wound around the base is attached to the
center of the diaphragm 6 so as to penetrate the base of the voice coil section 7 slightly on the
outer periphery of the upper end of the pole piece 3. It is configured to be able to vibrate in the
axial direction of the pole piece 3 by being spaced apart and inserted.
[0004]
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A plate-like damper member 9 is provided between the base inner wall of the housing 4 and the
voice coil portion 7 to position the voice coil 7 with respect to the pole piece 3 and to exhibit a
damper function for the diaphragm 6. It has become.
In the configuration of the speaker unit as described above, as a speaker damper, a corrugation
damper in which a cloth material impregnated with a thermosetting resin such as phenol is heatpressed and a concentric waveform is formed is generally used.
[0005]
However, in such a corrugation damper, in order to obtain a large amplitude displacement, it is
necessary to increase the external dimension of the damper, and the external shape is limited to a
circular shape, and It was necessary to fix the entire outer diameter to the frame of the speaker.
On the other hand, in recent years, as a speaker for television or personal computer, in order to
minimize the occupied area, a non-circular speaker having a large short axis / long axis ratio is
required. The application of the conventional corrugation damper to such non-circular speakers
is not only inadequate, but impossible due to its axial ratio.
[0006]
SUMMARY OF THE INVENTION The present invention was invented based on the abovementioned conventional problems, and the damper for a speaker according to the invention of
claim 1 comprises a voice coil portion for driving a diaphragm and a housing of the speaker. An
outer ring portion having a substantially rectangular outer shape, an annular inner ring portion
fittingly inserting and fixing the voice coil portion, and an inner ring portion coupled to the outer
ring portion, which is stably held in the portion A plurality of arm portions are formed, and the
arm portion is drawn from the inner ring portion and extends in a circular arc shape from the
straight portion extending in the tangential direction of the inner ring portion and is connected
to the outer ring portion It is characterized in that it is formed of an arc-shaped portion.
[0007]
According to this configuration, since the outer ring portion is formed in a substantially
rectangular shape, the speaker damper can be fixed to the frame of the speaker at two sides.
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2
As a result, the speaker damper can be applied to a non-circular speaker having a large ratio of
the minor axis to the major axis, and thus can be applied to a multiple drive speaker.
[0008]
In the speaker damper according to the invention of claim 2, in the speaker damper according to
claim 1, each arm portion is formed of three straight portions and an arc portion connecting the
straight portions. It is characterized by According to this configuration, since the outer ring
portion is formed in a substantially rectangular shape, the speaker damper can be fixed to the
frame of the speaker at two sides, and the arm portion formed of the straight portion and the arc
portion The voice coil portion can be elastically held in a stable state.
[0009]
As a result, the speaker damper can be applied to a non-circular speaker having a large ratio of
the minor axis to the major axis, and thus can be applied to a multiple drive speaker. Also, the
voice coil portion can be stably held in the housing of the speaker.
[0010]
According to a third aspect of the present invention, in the speaker damper of the first aspect,
each of the arm portions is formed of three straight portions and an arc portion connecting the
straight portions. It is characterized in that the radius of curvature is less than or equal to three
times the width of the linear portion. According to this configuration, since the outer ring portion
is formed in a substantially rectangular shape, the speaker damper can be fixed to the frame of
the speaker at two sides, and furthermore, the three straight portions constituting the arm
portion are elastic Each is independent.
[0011]
As a result, the speaker damper can be applied to a non-circular speaker having a large ratio of
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3
the minor axis to the major axis, and thus can be applied to a multiple drive speaker. Further,
since the linear portions of the respective arm portions are elastically independent, the voice coil
portion can be held in a more stable state.
[0012]
According to a fourth aspect of the present invention, in the speaker damper of the fourth aspect,
the voice coil portion for driving the diaphragm is stably held in the housing portion of the
speaker, the outer ring portion having a substantially rectangular outer shape, and the voice coil.
And a plurality of arm portions for connecting the inner ring portion to the outer ring portion,
and the material is a woven fabric made of high elastic fiber such as glass fiber. It is
characterized in that it is formed of a flat sheet of reinforced polymer material. According to this
configuration, the speaker damper can be formed by a forming method such as punching or
cutting out, and in particular, the damper characteristics can be controlled by the type of fiber
material to be reinforced.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a speaker damper according
to the present invention will be described in detail below with reference to the attached
drawings.
[0014]
FIG. 1 shows a schematic plan view of a speaker damper according to an embodiment of the
present invention. As is apparent from this figure, the present speaker damper 1 has a square
outer ring portion 2 and an inner ring portion 3. It is comprised by the arm part 4 which
connects these, and the material is formed by the planar sheet of the polymeric material
reinforced with the woven fabric which consists of high elasticity fiber, such as glass fiber.
And in this invention, the external shape of the outer side ring part 2 is made into a rectangle of
33 mm x 32 mm, and the internal diameter of the inner side ring part 3 is 13 mm. Each arm
portion 4 includes a straight portion 4a extending in a tangential direction of the inner ring
portion 3, two straight portions 4c and 4e parallel to the straight portion 4a, and arc portions 4b
and 4d connecting the respective straight portions. It consists of
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[0015]
The radius of curvature of each arc portion is three times or less, preferably 1.5 times to 2.5
times, the width of the straight portion. Further, the ratio of the third power of the length of each
straight portion to the width is made constant. FIG. 2 is a graph showing the load / displacement
relationship of the speaker damper 1, the load (g) on the horizontal axis and the displacement
(mm) on the vertical axis.
[0016]
FIG. 3 shows a speaker using the speaker damper 1 of the present invention. This speaker is a 40
mm × 80 mm non-circular speaker. In FIG. 3, in order to simplify the description, the diaphragm,
the voice coil portion and the like are not shown, and only the speaker damper 1 and the housing
5 are shown. The speaker damper 1 is fixed to only the two parallel sides forming the outer
shape with respect to the housing 5, and it is not necessary to fix the entire circumference as in
the conventional damper.
[0017]
FIG. 4 shows an example in which the speaker damper 1 of the present invention is applied to a
40 mm × 200 mm non-circular speaker. This example is an example of a multiple drive type
speaker using two voice coils. The speaker damper of the present invention is fixed to only two
parallel sides forming the outer shape with respect to the housing 5 as described above, and
therefore, it can be applied to a multiple drive type speaker as shown in FIG. It can not respond
with the thing of the structure fixed to a housing in the whole circumference like a damper.
[0018]
The present invention is configured as described above, and the speaker damper according to the
invention of claim 1 stably holds the voice coil portion for driving the diaphragm in the housing
portion of the speaker. A ring-shaped inner ring portion for inserting and fixing the voice coil
portion, and a plurality of arm portions for connecting the inner ring portion to the outer ring
portion. The arm portion is formed by a straight portion extending from the inner ring portion
and extending in a tangential direction of the inner ring portion and an arc-shaped portion
extending in an arc shape from the straight portion and connected to the outer ring portion
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Configuration.
[0019]
According to the present invention, since the outer ring portion is formed in a substantially
rectangular shape, the speaker damper can be fixed to the housing of the speaker at two sides.
Therefore, the speaker damper can be applied to a non-circular speaker having a large ratio of
the short axis to the long axis, and can also be applied to a multiple drive speaker.
[0020]
According to a second aspect of the present invention, in the speaker damper of the first aspect,
each arm portion is formed of three straight portions and an arc portion connecting the straight
portions. It is.
[0021]
According to the present invention, since the outer ring portion is formed in a substantially
rectangular shape, the speaker damper can be fixed to the housing of the speaker at two sides,
and the arm portion formed by the straight portion and the arc portion The voice coil portion can
be elastically held in a stable state.
Therefore, the speaker damper can be applied to a non-circular speaker having a large ratio of
the short axis to the long axis, and thus can be applied to a multiple drive speaker.
[0022]
According to a third aspect of the present invention, in the speaker damper of the first aspect,
each of the arm portions is formed of three straight portions and an arc portion connecting the
straight portions. The radius of curvature is three times or less the width of the linear portion.
[0023]
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According to the present invention, since the outer ring portion is formed in a substantially
rectangular shape, the speaker damper can be fixed to the housing of the speaker at two sides,
and furthermore, the three straight portions constituting the arm portion are elastic. Each is
independent.
Therefore, the speaker damper can be applied to a non-circular speaker having a large ratio of
the minor axis to the major axis, and in particular, to a multiple drive speaker. Further, since the
linear portions of the respective arm portions are elastically independent, the voice coil portion
can be held in a more stable state.
[0024]
According to a fourth aspect of the present invention, in the speaker damper of the fourth aspect,
the voice coil portion for driving the diaphragm is stably held in the housing portion of the
speaker, the outer ring portion having a substantially rectangular outer shape, and the voice coil.
And a plurality of arm portions for connecting the inner ring portion to the outer ring portion,
and the material is a woven fabric made of high elastic fiber such as glass fiber. It is the structure
formed from the flat sheet of the reinforced polymeric material. According to this invention, the
speaker damper can be formed by a forming method such as punching or cutting out, and in
particular, the damper characteristics can be controlled by the type of fiber material to be
reinforced.
[0025]
Brief description of the drawings
[0026]
1 is a plan view of a speaker damper according to an embodiment of the present invention.
[0027]
2 is a diagram showing the relationship between the load and displacement of the speaker
damper of the present invention.
[0028]
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3 is a plan view showing a state in which the speaker damper of the present invention is fixed to
the housing of the speaker.
[0029]
4 is a plan view when the speaker damper of the present invention is applied to a multiple drive
type speaker.
[0030]
5 is a cross-sectional view showing a conventional speaker unit.
[0031]
Explanation of sign
[0032]
1 Speaker Damper 2 Outer Ring 3 Inner Ring 4 Arm
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