JP3131033B2 - Speaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a loudspeaker used for various kinds of audio equipment.

[0002]

2. Description of the Related Art Hitherto, this type of speaker has been configured as shown in FIG. That is, a field part 5 configured by incorporating a ring-shaped magnet 3 and a ring-shaped upper plate 4 on a lower plate 2 having a center pole 1
The frame 6 is joined to the upper plate 4 of the above, and the diaphragm 8 is adhered to the periphery of the frame 6 together with the gasket 7.

A voice coil 10 fitted without eccentricity into a magnetic gap 9 formed by a magnetic circuit of the field portion is coupled to the center of the diaphragm 8. A bobbin intermediate portion of the voice coil 10 is held by a damper 11, and a dust cap 12
Was incorporated. Here, in this type of conventional speaker, a lead wire 13 pulled out from the voice coil 10 is connected and fixed to a gold wire 14 on the side wall of the bobbin, and the gold wire 14 is disposed in the air between the diaphragm 8 and the damper 11. The structure was such that the terminal 15 was connected and wired.

In order to integrate the damper and the gold wire, a woven fabric containing the gold wire is impregnated with a resin, formed into a predetermined shape and punched, and an inner peripheral portion of the voice coil 10 is formed.
There is also a structure in which the lead wire from the outside and the outer peripheral portion are connected to the terminal 15.

[0005]

SUMMARY OF THE INVENTION Among the above prior arts,
In the former configuration, when the gap between the diaphragm 8 and the damper 11 is small in a thin speaker or the like, when the speaker is activated, one of them is fixed to the voice coil bobbin, and the gold thread wire 14 having an appropriate slack is attached to the voice coil 10. Vibration plate 8 and damper 11
, Causing an abnormal sound or disconnection at a contact portion with the terminal 15 or the voice coil bobbin.

In the latter configuration, a resin coating is formed on the surface of the gold wire because the gold wire is impregnated with the resin, and the solderability for connecting to the voice coil 10 or the terminal 15 is extremely deteriorated. .

Accordingly, the present invention provides a speaker which does not need to adjust the slack of the gold wire, does not make the gold wire come into contact with other components to generate an abnormal sound, and has good solderability. is there.

[0008]

To solve the above-mentioned problems, the present invention is characterized by the following constitution. at least,
A field part and a void fitted into the magnetic gap of the field part
And a damper for holding the voice coil.
Wherein the damper is resin impregnated.
Heats the woven fabric with the warp and weft woven together with the gold wire
Press molding, the center part is the same as the outer diameter of the voice coil bobbin
Etc. and punched into a circular hole, and the outer peripheral part
Is formed by punching out
Mosquito .

[0009]

[Function] Because the gold wire is wired inside the damper,
It is not necessary to adjust the slack of the gold wire, and since the gold wire does not independently vibrate independently, no abnormal noise is generated due to contact with other components such as the diaphragm. Further, since the damper material is formed by weaving the resin impregnated yarn and the gold thread wire, a post-impregnation step for maintaining the shape and adjusting the hardness is not required, so that the solderability is good.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a speaker according to the present invention will be described based on embodiments. As shown in FIG. 1, a field portion 19 is formed by incorporating a ring-shaped magnet 17 and a ring-shaped upper plate 18 on a lower plate 16 having a center pole.
The terminal and the terminal 20 are integrally molded at the same time as the frame 21 is formed of resin, and a diaphragm 23 is adhered to the periphery of the frame together with the gasket 22.

At the center of the vibrating plate 23, the field portion 1 is provided.
A voice coil 25 fitted without eccentricity into a magnetic gap 24 formed by the magnetic circuit 9 is coupled.

The middle portion of the bobbin of the voice coil 25 is
As shown in FIG. 2, a woven fabric obtained by weaving a synthetic fiber impregnated with a phenolic resin and a gold thread wire having a synthetic fiber core as a warp is used to form several concentric wavy corrugations around a gold wire band 26. It is held by a molded damper 27.

The center of the damper 27 is a circular hole having a diameter equal to the outer diameter of the voice coil bobbin, and the voice coil bobbin is inserted and coupled into this hole. Also, in FIG. 1, the lead wire pulled out from the voice coil 25 is connected to the gold wire band at the center of the damper, and the gold wire band 26 provided on the outer periphery of the damper 27 shown in FIG. 2 is connected to the terminal 20 in FIG. ing. Further, a dust cap 28 is joined to the upper surface of the central portion of the diaphragm 23.

Next, an example of manufacturing a damper according to the present invention will be described. As the warp and the weft, cotton yarn, Conex yarn and the like are used as in the case of the conventional damper.

The resin impregnated in these warp and weft yarns is
Phenolic resins are common and Hitachi Chemical Co., Ltd.
Examples include Hitachil PR-3800 manufactured by Sumitomo Durez Co., Ltd. and Sumilite PR-9480 manufactured by Sumitomo Durez Corporation. Also, as the gold wire, a flat knitting wire wound with copper foil is usually used.

The weaving of the resin-impregnated warp and weft yarns and the gold wire is generally a plain weave in terms of the performance of the damper.
Woven into 60 x 60 woven fabrics.

The woven fabric may be formed into a damper in the same manner as in the prior art. Usually, it may be heated and pressed using a mold having a predetermined shape. After the pressing, the inner and outer diameters of the formed woven fabric are cut in accordance with the diameters of the diaphragm 23 and the voice coil bobbin, thereby forming a damper having a predetermined shape.

[0018]

As described above, the loudspeaker of the present invention has a gold wire woven into a damper made of a woven cloth, formed into a concentric corrugated shape, and the outer periphery of the damper is provided with a woven gold wire band. By connecting both ends of the gold wire band to the lead wire pulled out from the voice coil and the terminal insulated by the resin frame, it is not necessary to adjust the slack of the gold wire wire during speaker assembly. The gold wire vibrates independently in the air, and contacts other components such as a diaphragm and a damper to generate an abnormal sound, and the bending stress of the gold wire eliminates disconnection at the connection between the voice coil lead and the terminal. Furthermore, since the resin impregnated yarn is woven into the damper base material, a resin coating is formed on the surface of the gold thread wire as in post-impregnation, and the solderability is not significantly deteriorated. The reliability of wiring and the rationalization of assembly are dramatically improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a speaker according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a damper used in the present invention.

FIG. 3 is a sectional view of a conventional speaker.

[Explanation of symbols]

 16: Lower plate 17: Ring magnet 18: Upper plate 19: Field part 20: Terminal 21: Resin frame 22: Gasket 23: Diaphragm 24: Magnetic gap 25: Voice coil 26: Gold wire band 27: Damper 28: Dust cap

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-218299 (JP, A) JP-A-4-75499 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04R 9/04 103 H04R 9/04 105 H04R 9/02 103 H04R 31/00

Claims (1)

(57) [Claims] At least a field part and a magnetic field of the field part
A voice coil fitted into the gap;
And a damper that holds the
Te, the damper, the woven fabric woven resin-impregnated warp and weft with gold wire and pressurized hot press molding, punching a central portion in the circular hole equivalent to the outer diameter of the voice coil bobbin and the outer peripheral portion of a predetermined length The gold wire is protruded and punched out
A speaker formed by: