JPH10164692A - Damper for speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a damper, with which distortion does not occur or a phenomenon such as difficulty in soldering does not occur, by providing plural fabric exposed bands, for which thermosetting resin is not filled or applied, at suitable circumferential intervals in the direction connecting the inner and outer edges of the speaker damper. SOLUTION: Thermosetting resin 2 is applied so that fabric exposed bands 1a can be redially prepared at fixed circumferential intervals in the damper forming area of fabric 1 and a fabric exposed band 1b can be prepared at a central part. In order to fill the thermosetting resin 2 in such a pattern, it is enough only to use the method for printing patterns on the fabric. In such a case, in order to fill the thermosetting resin 2 in the fabric 1, it is preferable that the thermosetting resin 2 is printed on both sides of fabric 1. Afterwards, concentric waveforms are added by heat mold working and it is preferable that the resin 2 is printed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker damper.

[0002]

2. Description of the Related Art Conventionally, a damper for a loudspeaker is made by impregnating (or applying) a thermosetting resin uniformly over a cloth material made of a woven or non-woven fabric, forming a concentric corrugation by thermoforming, and forming the resin. After hardening, it is manufactured by punching into a disk shape with a press.

Further, in order to simplify wiring to a voice coil when assembling a speaker, a cloth material integrally provided with a conductor for energizing the voice coil is used, and a thermosetting resin is used for the cloth material. It is also known to produce a conductor-containing damper by impregnating and curing the resin in a state of concentric corrugations (Japanese Utility Model Publication No. Sho 47-30441, Japanese Patent Application Laid-Open No. Sho 61-61).
-218299, JP-A-2-134100, JP-A-3-43000, etc.).

[0004]

However, the damper manufactured in this manner may be distorted due to residual stress at the time of thermoforming. If the damper is distorted, the voice coil attached to the inner peripheral edge of the damper is not accurately positioned in the magnetic circuit gap, so that troubles such as contact easily occur. In the case of a damper with a conductor for energizing the voice coil integrated into the cloth, the conductor is also hardened with resin together with the cloth, causing a difference in rigidity between the part with and without the conductor, causing distortion. It is difficult to solder the end of the conductor to the voice coil lead wire or the external lead wire.

An object of the present invention is to provide a speaker damper which solves the above problems.

[0006]

In order to achieve this object, the present invention relates to a method of impregnating or applying a thermosetting resin to a cloth material and curing the thermosetting resin in a state of forming concentric corrugations. In the speaker damper, a plurality of cloth material exposed bands, which are not impregnated or coated with the thermosetting resin, are provided at appropriate intervals in the circumferential direction, in a direction connecting the inner peripheral edge and the outer peripheral edge. (Claim 1). In this way, the residual stress at the time of thermoforming can be absorbed by the exposed cloth material band not solidified with the resin,
The occurrence of distortion can be suppressed.

When the conductor for energizing the voice coil is provided integrally with the cloth material, it is preferable to provide a conductor exposed band which is not impregnated or coated with a thermosetting resin along the conductor. . In this way, the residual stress during thermoforming can be absorbed by the exposed conductor band, so that distortion can be suppressed, and since the conductor is exposed, soldering to the lead wire of the voice coil and external lead wires can be performed. It will be easier. When the conductor exposed band is provided, the cloth exposed band may be provided together with the conductor exposed band at an appropriate interval in the circumferential direction from the conductor exposed band (claim 3).

In the present invention, it is preferable that the damper is configured as described above, and further, an exposed portion of the cloth material not impregnated or coated with the thermosetting resin is provided on the inner peripheral edge thereof ( Claim 4). This way,
The voice coil bobbin can be easily and accurately mounted.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 3 show a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a cloth material made of a woven or non-woven fabric as a material of a damper. In this embodiment, first, a thermosetting resin 2 is radially formed in the damper forming region of the cloth material 1 at regular intervals in the circumferential direction, and a cloth material exposed portion 1b is formed in the center. Impregnation so that In order to impregnate such a pattern with the thermosetting resin 2, it is preferable to use a print printing technique of printing a picture on a cloth. In this case, it is preferable to print the thermosetting resin 2 on both surfaces of the cloth material 1 in order to sufficiently impregnate the cloth material 1 with the thermosetting resin 2.

Thereafter, as in the conventional case, concentric corrugations are formed by thermoforming and the resin 2 is cured.
Punch out the dashed line with a press (you may cut it out with a laser or the like). Then, the damper 3 as shown in FIGS. 2 and 3 is obtained. 2 and 3, reference numeral 4 denotes a concentric waveform, reference numeral 5 denotes a flat flange portion fixed to a speaker frame, and reference numeral 1b denotes a cloth material exposed portion provided on an inner peripheral edge.

The damper 3 thus obtained is obtained by impregnating a cloth material 1 with a thermosetting resin 2 such as a phenol resin.
Although it has been cured, it has a cloth material exposed band 1a that is not impregnated with the thermosetting resin radially at predetermined intervals in the circumferential direction. If such a cloth exposed band 1a is provided, the residual stress at the time of thermoforming is absorbed by the cloth exposed band 1a, so that the distortion-free damper 3 can be obtained.

When the cloth exposed portion 1b which is not solidified with resin is provided on the inner peripheral edge, when the voice coil bobbin is mounted, the voice coil bobbin can be mounted at a correct position without being deformed. Cloth exposed part 1b
After the voice coil bobbin is mounted, is fixed with an adhesive and fixed to the voice coil bobbin.

FIG. 4 shows a second embodiment of the present invention. The difference between this damper 3 and the first embodiment is that the both ends of the radially provided cloth exposed strip 1a are located slightly inside the inner and outer peripheral edges of the resin 2, and the inner and outer peripheral edges of the resin The two are connected. Residual stress during thermoforming is likely to occur mainly in the waveform 4 part,
Even with such a configuration, the distortion of the damper 3 can be reduced. In addition, with such a configuration, the inner peripheral edge and the outer peripheral edge are reliably held in an annular shape, so that handling during speaker assembly is facilitated.

In this embodiment, the cloth exposed belt 1a is used.
Are located inside the inner peripheral edge and the outer peripheral edge of the resin 2, but only the outer end or the inner end of the cloth exposed belt 1 a is
, And the other end may reach the inner or outer peripheral edge of the resin 2.

FIGS. 5 and 6 show a third embodiment of the present invention. This embodiment is a case in which a conductor 6 for supplying a current to a voice coil is provided integrally with a cloth material 1. Conductor 6
Is integrated with the cloth material 1 by means such as weaving or bonding. The conductor 6 may be an insulated conductor having an insulating film or a bare conductor having no insulating film.

The cloth material 1 containing such a conductor 6 is prepared,
As shown in FIG. 5, a thermosetting resin 2 is impregnated into the damper forming region of the cloth material 1 so as not to cover the conductor 1 and to form a cloth exposed portion 1b at the center. In order to impregnate such a pattern with the thermosetting resin 2, it is preferable to use a print printing technique of printing a picture on a cloth. In this case, it is preferable to print the thermosetting resin 2 on both surfaces of the cloth material 1 in order to sufficiently impregnate the cloth material 1 with the thermosetting resin 2.

Thereafter, as in the conventional case, concentric corrugations are formed by thermoforming and the resin 2 is cured.
Press out the dashed line. Then, the damper 3 as shown in FIG. 6 is obtained. In FIG. 6, reference numeral 4 denotes a concentric waveform, reference numeral 5 denotes a flat flange portion fixed to a speaker frame, reference numeral 6a denotes an exposed conductor band, and reference numeral 1b denotes an exposed cloth material provided on an inner peripheral edge.

In the damper 3 thus obtained, the cloth material 1 is impregnated with a thermosetting resin 2 such as a phenol resin, and is cured. A plurality of dampers 3 are provided in the direction connecting the inner peripheral edge and the outer peripheral edge.
It has the conductor exposed zone 6a which is not impregnated with the thermosetting resin. If such a conductor exposed band 6a is provided, the residual stress at the time of thermoforming is absorbed by the conductor exposed band 6a, so that the damper 3 with small distortion can be obtained.

When the cloth material exposed portion 1b which is not hardened with resin is provided on the inner peripheral edge, when the voice coil bobbin is mounted, the voice coil bobbin can be easily mounted without being deformed. After attaching the voice coil bobbin, the cloth material exposed portion 1b is fixed with an adhesive and fixed to the voice coil bobbin. Further, since the conductor 6 is not covered with the resin 2, it can be easily soldered to the lead wire of the voice coil and the external lead wire.

FIG. 7 shows a fourth embodiment of the present invention. This damper 3 is provided with a conductor exposed band 6a in the same manner as the damper 3 of FIG. 6, and a cloth material not impregnated with a thermosetting resin radially at an appropriate distance from the conductor exposed band 6a in the circumferential direction. An exposure band 1a is provided. In this way, the effect of absorbing the residual stress during the thermoforming process is better than that of the damper 3 shown in FIG. 6, and the damper 3 with less distortion can be obtained. Since the configuration other than the above is the same as that of the damper 3 of FIG. 6, the same portions are denoted by the same reference numerals and description thereof will be omitted.

[0021]

As described above, according to the present invention, a speaker damper with small distortion can be obtained.
Highly accurate speaker assembly can be performed. When the conductor for conducting the voice coil is provided integrally with the cloth material, the conductor is not covered with resin, so that the conductor can be easily soldered to the lead wire of the voice coil and the external lead wire. It can be carried out.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which a cloth material is impregnated with a thermosetting resin in a first embodiment of the present invention.

FIG. 2 is a plan view showing a damper according to the first embodiment of the present invention.

3A is a cross-sectional view taken along the line AA of FIG. 2, and FIG. 3B is a cross-sectional view taken along the line BB of FIG. 2;

FIG. 4 is a plan view showing a damper according to a second embodiment of the present invention.

FIG. 5 is a plan view showing a state in which a cloth material is impregnated with a thermosetting resin in the third embodiment of the present invention.

FIG. 6 is a plan view showing a damper according to a third embodiment of the present invention.

FIG. 7 is a plan view showing a damper according to a fourth embodiment of the present invention.

[Explanation of symbols]

 1: Cloth material 1a: Cloth exposed belt 1b: Cloth exposed part 2: Thermosetting resin 3: Damper 4: Concentric waveform 5: Flange part 6: Conductor 6a: Conductor exposed band

Claims (4)

[Claims] 1. A cloth material impregnated or coated with a thermosetting resin,
In a speaker damper obtained by curing the thermosetting resin in a state of giving a concentric waveform, a cloth material exposed band not impregnated or coated with the thermosetting resin in a direction connecting an inner peripheral edge and an outer peripheral edge. A speaker damper comprising a plurality of speakers provided at appropriate intervals in a circumferential direction. 2. A speaker made by impregnating or applying a thermosetting resin to a cloth material integrally provided with a conductor for energizing a voice coil, and curing the thermosetting resin in a state of forming concentric corrugations. A damper for a loudspeaker, wherein a conductor exposed band not impregnated or coated with a thermosetting resin is provided along the conductor in the damper. 3. A cloth-exposed strip not impregnated with or coated with a thermosetting resin is provided at a suitable circumferential distance from the conductor-exposed strip in a direction connecting the inner peripheral edge and the outer peripheral edge. The speaker damper according to claim 2, wherein 4. The speaker damper according to claim 1, wherein an exposed portion of the cloth material not impregnated or coated with the thermosetting resin is provided on the inner peripheral edge.