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JPH08140184

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DESCRIPTION JPH08140184
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker used in various audio equipment.
[0002]
2. Description of the Related Art There is a conventional speaker in which a cushion made of
urethane foam is joined to the front of the mounting portion of the speaker, and this type of
conventional speaker will be described below with reference to the drawings.
[0003]
FIG. 3 is a half sectional view showing the configuration of the conventional speaker. In FIG. 3, 1
is a lower plate, 2 is a magnet, 3 is an upper plate, 4 is a frame, 5 is a voice coil, 6 is a damper, 7
is a damper. The reference numeral 8 is a diaphragm, 9 is a gasket, and 10 is a cushion made of
urethane foam.
[0004]
FIG. 4 is a cross-sectional view of an essential part showing a conventional speaker thus
configured attached to a car, and the cushion 10 coupled to the front of the attachment part of
the speaker is attached as shown in the figure. It is attached so that it may be crimped | bonded
to the vehicle body trim side rib 11 of this.
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[0005]
However, in the conventional configuration as described above, since the gasket 9 and the
cushion 10 are connected to the mounting portion of the speaker, not only the number of parts is
increased but also the number of assembling steps is required. The cost was also expensive.
In addition, in the attachment of the speaker to the vehicle body, the vehicle body trim side rib
11 presses and seals the cushion 10 on the gasket 9 of the speaker to prevent sound leakage, but
in the speaker assembly process When a slight displacement occurs when attaching the gasket 9
or the cushion 10, a positional displacement with the vehicle body trim side rib 11 occurs,
thereby causing a problem of deteriorating the sealing and lowering the performance. The
[0006]
An object of the present invention is to solve the above-mentioned conventional problems, to
stabilize the quality, and to provide an inexpensive speaker.
[0007]
SUMMARY OF THE INVENTION In order to solve this problem, in the loudspeaker according to
the present invention, the edge connected to the outer peripheral part of the diaphragm is
formed thicker than the thickness of the main body part connected to the peripheral edge of the
frame. It is comprised in the roll shape which consists of foaming urethane.
[0008]
According to this configuration, the outer peripheral portion of the edge is thicker than the main
body portion to play the role of a gasket and a cushion, and the number of parts is reduced to
eliminate sticking deviation and the like, thereby preventing quality problems.
Further, since the accuracy of the parts is determined by the accuracy of the mold at the time of
molding, the accuracy of the speaker becomes very high.
[0009]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A loudspeaker according to an
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embodiment of the present invention will be described below with reference to the drawings.
[0010]
FIG. 1 is a half sectional view showing the configuration of the loudspeaker according to the
embodiment. In FIG. 1, 1 is a lower plate, on which a magnet 2 and an upper plate 3 are coupled
to form a magnetic circuit having a magnetic gap The frame 4 is coupled to the upper surface,
and the voice coil 5 to be fitted into the magnetic gap is coupled to the periphery of the frame 4
at the center, and the outer peripheral portion 12a is formed of urethane foam thicker than the
thickness of the main body. A diaphragm 8 in which a roll-shaped edge 12 is coupled to an outer
peripheral portion is coupled, and a damper 6 for supporting the voice coil 5 is coupled.
[0011]
As described above, the speaker according to the present embodiment can be easily obtained by
processing the edge 12 made of the urethane foam without leaving a mold against the outer
peripheral portion 12 a of the edge 12 at the time of forming processing and leaving the original
shape as it is By making this outer peripheral portion 12a act as the cushion 10 stuck to the
conventional gasket 9, there is no sticking displacement due to the adhesion of the gasket 9, etc.,
and the positional accuracy with the vehicle trim side rib 11 as shown in FIG. The effect of
improving the sealability is obtained.
[0012]
As described above, the speaker according to the present invention can reduce the number of
parts of the speaker and the number of assembling steps by integrating the edge portion and the
cushion portion of the diaphragm, and can realize a cheaper speaker with stable quality. It is a
thing.
[0013]
Brief description of the drawings
[0014]
1 is a front half sectional view showing the configuration of a speaker according to an
embodiment of the present invention
[0015]
Fig. 2 Main part sectional view showing how the speaker is attached to the vehicle body
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[0016]
Fig. 3 A front half sectional view showing the structure of a conventional speaker
[0017]
Main part sectional view showing the attachment state of the conventional speaker to the vehicle
body
[0018]
Explanation of sign
[0019]
DESCRIPTION OF SYMBOLS 1 lower plate 2 magnet 3 upper plate 4 frame 5 voice coil 6 damper
8 diaphragm 11 vehicle body trim side rib 12 edge 12 a outer periphery of edge
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