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Patent Office Name of the Palace 1 Invention Name 3 Patent Applicant Address Osaka Prefecture
Kadoma City Oji Kadoma 1006 Name (582) Matsudo Electric Industrial Co., Ltd. [Representative
Shoji Matsushita 4 agent 〒 571 Address Osaka Prefecture Kadoma city Ogata Kadama address
1006 (4) Application form duplicate 1 appropriate thin-one [phase] Japan Patent Office ■ JPA
50-26226.64-651; 5 Scoil 9. A coil bobbin 10 on which 9 is wound is joined 1; name of the
invention 1; name of the invention speaker
3. Detailed Description of the Invention The present invention relates to a speaker VC showing a
stable quality with high heat resistance without breakage even when a large input is applied. In
general, the speaker is configured as shown in FIG. That is, the frame 6 is connected to the field
portion 5 constituted by the plate 2 provided with the center ball 1, the ring-shaped magnet 3
and the ring-shaped upper plate 4 and the gasket e.g. The diaphragm 8 is attached to each of the
adhesive members with the adhesive 7, and is suspended at a lower part of the center of the
vibrating part 8 and suspended at the lower part, and the middle part of the coil bobbin 10 is
fixed to the frame 6 etc. To support the voice coil 9 in the magnetic gap of the field section 6, and
attach the dust cap 12 to the upper surface of the central part of the diaphragm 8, so that dust in
the air penetrates the magnetic gap section. It is configured not to. However, in the above
embodiment, although the configuration of the external magnet type was described as the field
section 6, even if it is an internal magnet type field section in which only the magnet and the
center pole or the magnet are housed inside the yoke Good. As described above, the conventional
damper is formed by impregnating a molding phenolic resin with cotton or another natural fiber
as a base material and then thermoforming it. Thus, the damper made of cotton is inferior in heat
resistance and is a stone. In other words, the physical strength of the cotton substrate is severely
hindered because it is thermoformed at about 2450 "C, and it is very brittle because it is
impregnated with a thermosetting resin. EndPage: When used for a high input speaker, this
damper was broken when a large input was applied. In addition, cotton is difficult to store, and it
tends to develop stones and mold when it is left for a long time in a humid atmosphere, and its
physical strength deteriorates at the end of the rod. Furthermore, the base material that is
stronger than the polyester fiber has a low softening point and causes heat deformation, so it is a
book that is difficult to use as a damper. The present invention as described above eliminates the
conventional drawbacks. Hereinafter, the damper of the speaker having the configuration shown
in FIG. 1 according to the present invention is fundamentally improved. That is, the present
invention uses a filter cloth made of a base material for a damper and an aromatic polyamide
fiber excellent in heat resistance with 1-, and as shown in FIG. Although it shows a shrinkage
rate, there is almost no deformation after molding, and the conventional polyester fiber is
extremely excellent and practically does not cause any trouble at all. Also, as shown in FIG.
Wearable and stronger than cotton, it is extremely effective as a damper for high-input speakers.
Furthermore, as shown in FIG. 4, the weather resistance is also good as compared with
conventional cotton fibers. Such an aromatic boria-like fiber is impregnated with a phenol resin,
and a damper is molded to support the coil bobbin 710 as shown in FIG. The damper according
to the present invention and the conventional cotton-made damper are impregnated with a
phenol resin, and the number of bending of the damper after thermoforming at various
temperatures is as follows. As described above, using a damper having a cloth or a substrate
made of an aromatic polyamide fiber as a base according to the present invention is excellent in
all points such as heat resistance, weather resistance, and bending and strong stool, and can be
used as a speaker for high input. , X will maintain the stable quality, will significantly improve the
reliability of the speaker, which is an industrial value.
4. Brief description of the drawings First and second cross-sectional views of a general
loudspeaker, FIGS. 2 to 4 show physical properties of the base of the non-dunbar and the
conventional base constituting the loudspeaker of the present invention. It is a characteristic
comparison figure shown. 6 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · voice coil ... ... dumper. Name of agent Attorney Nakao et al. 1
person Fig. 1 EndPage: 2 Fig. 2 Fig. 2 Fig. 3 ((H ton 6 agents other than the above 41 places in
Osaka Prefecture 3
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description, jps50126226
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