JP2001309489A - Speaker damper and speaker unit using the same - Google Patents

Abstract

(57) Abstract: The present invention relates to a speaker damper used for various kinds of audio equipment and a speaker unit using the same, and an object thereof is to provide a damper suitable for high withstand input. . SOLUTION: The speaker damper 10 of the present invention includes an inner ring portion 10a, an outer ring portion 10c provided outside the inner ring portion 10a, and a first linear portion 10b extending outward from the inner ring portion 10a. And a second straight portion 10d extending inward from the outer ring portion 10c and a connecting portion 10e for connecting the ends of the first and second straight portions 10b and 10d. , The straight section 10
b and 10d prevent the voice coil 3 from moving in the rotational direction, secure the length of the connecting portion 10e, and support the amplitude of the large input of the voice coil 3 so as to be able to move up and down sufficiently to provide a large output of the speaker unit. (High input resistance).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker damper used for various kinds of audio equipment and a speaker unit using the same.

[0002]

2. Description of the Related Art A conventional technique will be described with reference to an exploded perspective view of a speaker unit shown in FIG.

According to FIG. 1, reference numeral 1 denotes a resin-molded frame having a small hole on the lower surface and an opening on the upper surface, and 2 denotes a yoke 2a, a magnet 2b mounted on the bottom surface of the frame 1, and an upper portion. This is a magnetic circuit section comprising a plate 2c and having a magnetic gap between the yoke 2a and the upper plate 2c. Reference numeral 3 denotes a voice coil fitted into the magnetic gap. The outer periphery is adhesively bonded to the outer peripheral side of the frame 1, and the inner periphery is adhesively bonded above the voice coil.

A damper 6 has an inner periphery adhesively bonded to the voice coil 3 and an outer periphery adhesively bonded to the frame 1, and supports the voice coil 3 in a vertically movable manner.
Is a terminal plate attached to the frame 1 by bonding and connected to the terminal of the wire loop 3a of the voice coil 3, and 8 is a dust cover.

Although the yoke 2a has been described as being mounted on the frame 1, the yoke 2a may be integrated with the frame 1 by insert molding.

The above-configured speaker unit inputs a voice signal from the outside to the wire ring 3a via the terminal plate 7, so that the voice coil 3 moves up and down in response to the input signal, and the diaphragm 5 vibrates. The sound is emitted.

[0007]

The above-described speaker damper of the speaker unit is generally made of a woven fabric such as cotton, silk or chemical fiber and impregnated with a thermosetting resin such as phenol. However, when a large input is applied to the speaker unit for a long time, the fixed portion of the fibers fixed by the thermosetting resin is broken, misalignment occurs, and the speaker unit is formed. Lowering the lowest resonance frequency, causing abnormal noise.

In addition, there is a problem that uncured portions remain in the resin due to temperature variations at the time of curing of the resin, uniformity of adhesion between fibers is impaired, and linearity at the time of amplitude is not good.

There is also a damper made of a resin, but if the elasticity of the damper is to be ensured, the shape becomes large,
It was not suitable for a small speaker unit.

[0010]

According to a first aspect of the present invention, there is provided a loudspeaker damper according to the present invention, comprising: an inner ring portion; an outer ring portion provided concentrically outside the inner ring portion; First extending outward from the part
A straight line or an arc-shaped connecting portion connecting the second straight line portion extending inward from the outer ring portion, the first straight line portion, and the end of the second straight line portion. And a plurality of connecting portions consisting of: a first and a second linear portion that prevent the voice coil from moving in the rotational direction,
The connecting portion is provided between the inner ring portion and the outer ring portion in an arc or a straight line, so that the length of the connecting portion is secured, and the amplitude due to the large input of the voice coil is supported so as to be able to move up and down sufficiently. This can contribute to increasing the output of a small speaker unit.

According to a second aspect of the present invention, there is provided a speaker damper according to the first aspect of the present invention, wherein a connection portion of the speaker damper according to the first aspect is provided as having a slope, and an inner ring portion for connecting the voice coil is directed upward. Since the speaker damper is positioned, the speaker damper can be provided in a reduced size without lifting the entirety of the speaker damper and increasing its size.

According to a third aspect of the present invention, there is provided a speaker damper according to the first aspect, wherein a polyester-based thermoplastic elastomer or a polystyrene-based thermoplastic elastomer is used as a resin material of the speaker damper according to the first aspect. Also, the sound quality can be improved by increasing the flexibility, and it can be used for a high sound quality speaker unit.

According to a fourth aspect of the present invention, there is provided a speaker damper according to the first aspect, wherein a gate port for injection molding is provided near an intersection of the outer ring portion and the second linear portion of the speaker damper according to the first aspect. To suppress the occurrence of weld lines at the connection portion and at the first and second straight portions in the vicinity thereof,
An object of the present invention is to provide a speaker damper that suppresses deterioration of strength and is excellent for high input resistance.

According to a fifth aspect of the present invention, there is provided a speaker unit in which the speaker damper according to the first aspect is incorporated in a speaker unit. This makes it possible to provide a speaker unit having excellent reliability and excellent reliability.

[0015]

(Embodiment 1) An embodiment of the present invention will be described below with reference to FIGS. In addition,
The same parts as those in the prior art are denoted by the same reference numerals and description thereof will be omitted.

FIG. 1 is a side sectional view of one embodiment of the speaker unit of the present invention, and FIG. 2 is an exploded perspective view of the speaker unit.
3 is a side sectional view of a speaker damper, which is the main part, FIG. 4A is a top view, FIG. 4B is a bottom view, and FIG. 4C is a perspective view. FIG. 5 shows the same force.
It is a displacement characteristic diagram.

Only the differences from the prior art will be described with reference to FIG. The difference from the conventional technology is the speaker damper,
Reference numeral 10 denotes a speaker damper formed by resin molding. Reference numeral 10a denotes an inner ring portion that is adhesively bonded to the voice coil 3, and 10b denotes a voice coil 3 (the inner ring portion 10).
A first straight portion 10c extending outward from the inner ring portion 10a on a straight line passing through the approximate center of a).
Is an outer ring portion adhesively bonded to the frame 1,
Reference numeral 0d denotes a second straight portion extending inward from the outer ring portion 10c on a straight line passing substantially through the center of the voice coil 3 (outer ring portion 10c), and the first straight portion 10b And the second linear portion 10d are bridged by the connecting portion 10e.

The connecting portion 10f formed by the first straight portion 10b, the second straight portion 10d, and the connecting portion 10e.
Are provided in this embodiment.

Next, the structure of the speaker damper 10 will be described in more detail. The outer ring portion 10c is formed with a certain thickness, and the second linear portion 10d extends on the same plane as the upper surface thereof. The connecting portion 10e is provided to be inclined upward continuously with the inner ring portion 10a.
Are integrated with the first linear portion 10b extending as the same plane from the outside, so that the inner ring portion 10a is positioned upward by the outer ring portion 10c, and the support position of the voice coil 3 can be set upward. .

Further, the first straight portion 10b and the second straight portion 10d extend to the vicinity of the outer ring portion 10c or the inner ring portion 10a in the extending direction, and the connecting portion 10e has the first and second straight portions. Since the straight portions 10b and 10d are integrally bridged in a large arc or straight form with an inclination, the first and second straight portions 10b and 10d are lengthened to prevent the voice coil 3 from rolling. In addition, the connection portion 10e is lengthened to improve the function as an elastic body, improve the tolerance of the amplitude of the vertical movement when the voice coil 3 is driven, and increase the input power of the speaker unit.

Reference numeral 12 denotes a stamping pin trace of a molding die formed on the back side of the outer ring portion 10c. Since the projecting pin of the molding die of the present embodiment also serves to release gas, To prevent the failure due to the residual gas in the speaker damper 10.

Reference numeral 13 denotes an injection gate opening at the time of molding. The outer ring portion 10c and the second linear portion 10d
A gate port is provided in the vicinity of the intersection of the first and second linear portions 10e and the weld line connection portion 10e during molding.
The generation at b and 10d is suppressed, the strength deterioration of the elastic body and its vicinity is suppressed, and the speaker unit contributes to high input resistance.

FIG. 5 shows the force / displacement characteristics of the speaker damper (A) of the present embodiment and the conventional speaker damper (B). It was confirmed that the damper was superior.

By using a polyester-based thermoplastic elastomer or a polystyrene-based thermoplastic elastomer as the resin molding material of the speaker damper 10, the flexibility of the speaker can be increased and the sound quality of the speaker unit can be improved. It is.

[0025]

As described above, the speaker damper of the present invention does not cause misalignment as compared with the conventional speaker damper using a fiber, so that the minimum resonance frequency does not decrease and the elasticity of the speaker damper is reduced. Deterioration is also suppressed, and abnormal noise due to collision with other parts and collision between the supported voice coil and other parts is prevented, and a speaker damper excellent in high input resistance can be obtained. The one using this makes it possible to provide the excellent speaker unit described above.

[Brief description of the drawings]

FIG. 1 is a side sectional view of an embodiment of a speaker unit of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a side sectional view of a speaker damper, which is an essential part of the same.

FIG. 4 (a) is a top view thereof, FIG. 4 (b) is a bottom view thereof, and FIG.

FIG. 5 is the same force / displacement characteristic diagram

FIG. 6 is an exploded perspective view of a conventional speaker unit.

[Explanation of symbols]

 Reference Signs List 1 frame 2 magnetic circuit section 3 voice coil 5 diaphragm 10 damper 10a inner ring section 10b first linear section 10c outer ring section 10d second linear section 10e connecting section 10f connecting section

Continuing on the front page (72) Inventor Teruo Doi 1006 Kadoma Kadoma, Kadoma, Osaka Prefecture Inside Matsushita Electric Industrial Co., Ltd. (72) Inventor Kazuki Honda 1006 Odaka Kadoma, Kadoma, Osaka Pref. Matsushita Electric Industrial Co., Ltd. 5D012 BA08 CA07 CA14 EA06 FA02 GA01 HA03

Claims (5)

[Claims] 1. A damper formed by resin molding having an inner periphery connected to a voice coil for vibrating a diaphragm and an outer periphery connected to a frame to support the voice coil so as to be able to move up and down, and an inner ring portion. An outer ring portion provided concentrically on the outside thereof, a first linear portion provided on a straight line passing substantially through the center of the voice coil and extending outward from the inner ring portion, and the voice coil The second straight portion, the first straight portion, and the ends of the second straight portion, which are provided on a straight line different from the straight line passing substantially through the center and extend inward from the outer ring portion. A speaker damper composed of a plurality of sets of connecting portions each of which is connected to a straight or circular connecting portion. 2. The inner ring portion and the first linear portion are provided on substantially the same plane, and the outer ring portion and the second linear portion are provided on a substantially same plane lower than the inner ring portion and the first linear portion. The speaker damper according to claim 1, wherein the end portions are connected by a connection portion inclined. 3. The speaker damper according to claim 1, wherein a polyester-based thermoplastic elastomer or a polystyrene-based thermoplastic elastomer is used as a resin material of the speaker damper. 4. The speaker damper according to claim 1, wherein a gate port for injection molding is provided near an intersection of the outer ring portion and the second linear portion. 5. A frame having at least a magnetic circuit portion mounted thereon, a voice coil fitted in a magnetic gap of the magnetic circuit portion, a damper supporting the voice coil, and an outer periphery adhesively bonded to an outer periphery of the frame. A speaker unit having an inner periphery adhesively bonded to the voice coil, wherein an inner ring portion is adhesively bonded to the voice coil as the damper, and an outer ring portion is adhesively bonded to a substantially outer periphery of the frame. A speaker unit using the speaker damper according to claim 1.