JP4178717B2 - Speaker damper and speaker unit using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a speaker damper used in various acoustic devices and a speaker unit using the same.
[0002]
[Prior art]
The prior art will be described with reference to an exploded perspective view of the speaker unit of FIG.
[0003]
According to the figure, reference numeral 1 denotes a resin-molded frame having a small hole on the lower surface and an opening on the upper surface. Reference numeral 2 denotes a yoke 2a, a magnet 2b and an upper plate 2c attached to the bottom surface of the frame 1. This is a magnetic circuit portion in which a magnetic gap is provided between the upper 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 to the upper side of the voice coil and the diaphragm 5 is mounted.
[0004]
6 is a damper whose inner periphery is adhesively bonded to the voice coil 3 and whose outer periphery is adhesively bonded to the frame 1, and is a damper that supports the voice coil 3 so as to be movable up and down, and 7 is attached to the frame 1 by adhesion. A terminal plate to which the terminal of the wire ring 3a of the voice coil 3 is connected, and 8 is a dust cover.
[0005]
The yoke 2a has been described as being attached to the frame 1, but may be integrated with the frame 1 by insert molding.
[0006]
The speaker unit configured as described above inputs an audio signal from the outside to the wire ring 3a through the terminal plate 7, whereby the voice coil 3 moves up and down according to the input signal, and the diaphragm 5 is vibrated to emit sound. To do.
[0007]
[Problems to be solved by the invention]
The speaker damper of the above speaker unit is generally formed by thermoforming a base material made of woven fabric such as cotton, silk, or chemical fiber and impregnated with a thermosetting resin such as phenol. However, by applying a large amount of input to the speaker unit for a long time, the fixing part of the fibers fixed by the thermosetting resin is destroyed, resulting in misalignment, and the lowest resonance frequency of the speaker unit is lowered, resulting in abnormal noise. It was the cause of the outbreak.
[0008]
In addition, there is a problem that uncured portions remain in the resin due to temperature variation 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.
[0009]
In addition, although there is a resin damper, the size of the damper increases when attempting to ensure elasticity as a damper, and it is not appropriate for a small speaker unit.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a damper for a speaker according to the present invention according to claim 1 is extended outwardly from an inner ring part, an outer ring part concentrically provided on the outer side, and an inner ring part. A straight line or a circular arc connecting the first straight line part, the second straight line part extending inward from the outer ring part, the first straight line part and the end of the second straight line part The connecting portion includes a plurality of connecting portions. The first and second straight portions prevent movement of the voice coil in the rotational direction, and the connecting portion is connected to the inner ring portion and the outer ring. Since it is provided in a circular arc or linear shape between the parts, the length of the connecting part is secured, and the amplitude due to the large input of the voice coil can be supported so that it can move up and down sufficiently, which can contribute to high output of a small speaker unit It is.
[0011]
Still further, by providing as having tilting the connecting portions of the above described damper for a speaker, since the inner ring portion for coupling the voice coil so as to positioned above, lift the entire damper speaker Large it is also not is obtained by allowing the provision of miniaturized damper speaker for reduction.
[0014]
The speaker unit according to claim 2 of the present invention is the speaker unit according to claim 1 incorporated in the speaker unit, and can stabilize the lowest resonance frequency of the speaker unit and has excellent linearity. At the same time, it is possible to provide a speaker unit with excellent reliability.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
(Embodiment 1)
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In addition, the same part as a prior art gives the same number, and it abbreviate | omits description and demonstrates.
[0016]
1 is a side sectional view of an embodiment of a speaker unit according to the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a side sectional view of a speaker damper as the main part. 4A is a top view, FIG. 4B is a bottom view, FIG. 4C is a perspective view, and FIG. 5 is a force / displacement characteristic diagram.
[0017]
Only differences from the prior art will be described with reference to FIG. The difference from the prior art is a speaker damper, 10 is a speaker damper formed by resin molding, 10a is an inner ring portion that is adhesively bonded to the voice coil 3, and 10b is a voice coil 3 (inner ring portion). 10a), a first straight line portion 10c extending outward from the inner ring portion 10a on a straight line passing through the approximate center, and 10c is an outer ring portion that is adhesively bonded to the frame 1, and 10d is a voice. This is a second straight portion that extends inward from the outer ring portion 10c on a straight line passing through the approximate center of the coil 3 (outer ring portion 10c). The first straight portion 10b and the second straight portion The straight portion 10d is bridged by a connecting portion 10e.
[0018]
In the present embodiment, four sets of connecting portions 10f formed by the first straight portion 10b, the second straight portion 10d, and the connecting portion 10e are provided.
[0019]
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 straight portion 10d extends on the same surface as the upper surface thereof, and is continuous therewith. Since the connecting portion 10e is inclined upward and is integrated with the first straight portion 10b extending from the inner ring portion 10a as the same plane, the inner ring portion 10a is moved upward by the outer ring portion 10c. The support position of the voice coil 3 can be set upward.
[0020]
The first straight portion 10b and the second straight portion 10d are extended to the vicinity of the outer ring portion 10c or the inner ring portion 10a in the extending direction, and the connecting portion 10e is the first and second straight portions 10b. , 10d are integrally bridged in a large arc or linear form with an inclination, so that the first and second straight portions 10b, 10d are lengthened to prevent the voice coil 3 from rolling and connected. The length of the part 10e is improved to improve the function as an elastic body, the tolerance of the vertical movement amplitude when the voice coil 3 is driven is improved, and a large input is possible as a speaker unit.
[0021]
Reference numeral 12 denotes a protruding pin mark of the molding die formed on the back side of the outer ring portion 10c, but the protruding pin of the molding die of the present embodiment also serves as a gas vent, so that the molded speaker The failure due to the gas remaining in the damper 10 is prevented.
[0022]
Reference numeral 13 denotes an injection gate port at the time of molding. A gate port is provided in the vicinity of the intersection of the outer ring portion 10c and the second linear portion 10d. Generation at the first and second linear portions 10b and 10d is suppressed, strength deterioration of the elastic body and its vicinity is suppressed, and the speaker unit contributes to high input resistance.
[0023]
FIG. 5 shows the force / displacement characteristics of the speaker damper (A) of this embodiment and the conventional speaker damper (B). From the viewpoint of linearity, the speaker damper of the embodiment is also shown. Was confirmed to be excellent.
[0024]
In addition, by using a polyester-based thermoplastic elastomer or a polystyrene-based thermoplastic elastomer as a resin molding material for the speaker damper 10, it is possible to increase the flexibility as a speaker and improve the sound quality as a speaker unit.
[0025]
【The invention's effect】
As described above, the speaker damper of the present invention does not cause misalignment as compared with the speaker damper using the conventional fiber, so that the minimum resonance frequency is not reduced and the deterioration of elasticity is suppressed. It is possible to prevent abnormal noise caused by collision with other parts and collision between the supported voice coil and other parts, and it can be used as a speaker damper excellent for high input resistance. In this case, the above-described excellent speaker unit can be provided.
[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 the same main part. Top view (b) Bottom view (c) Perspective view [Fig. 5] Force / displacement characteristic diagram [Fig. 6] Exploded perspective view of conventional speaker unit [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame 2 Magnetic circuit part 3 Voice coil 5 Diaphragm 10 Damper 10a Inner ring part 10b First linear part 10c Outer ring part 10d Second linear part 10e Connection part 10f Connection part

Claims (2)

A damper formed by resin molding with an inner circumference connected to a voice coil that vibrates the diaphragm and an outer circumference connected to the frame to support the voice coil so that it can move up and down. The outer ring portion provided concentrically, the first straight portion provided on the straight line passing through the approximate center of the voice coil and extending outward from the inner ring portion, and the approximate center of the voice coil pass. A straight line or a circle provided on a straight line different from the straight line and 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. A damper for a loudspeaker comprising a plurality of sets of connecting parts comprising arcuate connection parts , wherein the inner ring part and the first linear part are provided on substantially the same plane, and are substantially in the same plane lower than this. On the outside above With ring portion and the second straight portions are provided, each of the straight portions the speaker damper which is connected in the connection portion inclined between the end of the. At least a frame having 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 is adhesively bonded to the outer periphery of the frame, and the inner periphery is the above a speaker unit comprising adhesively bonded to the voice coil, the inner ring portion as the damper is adhesively bonded to the voice coil, according to claim 1, the outer ring portion is adhesively bonded to substantially the outer circumference of the frame Speaker unit using a speaker damper.

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