JP3751445B2 - Speaker damper and method of manufacturing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a damper that is a constituent member of a speaker used as various acoustic devices, and more particularly to a speaker damper in which a tinsel wire is mounted and integrated on its surface and a method for manufacturing the same.
[0002]
[Prior art]
In general, a voice coil of a speaker is supported through a damper so as to vibrate.
[0003]
In addition, the lead wire of the voice coil and the input terminal of the speaker are connected by a tinsel wire, and this tinsel wire is usually arranged in the space between the diaphragm and the damper, so that it swings during operation. There is a problem that abnormal noise is generated by hitting the diaphragm or the damper, and this tendency becomes more remarkable as the speaker becomes smaller and thinner.
[0004]
In order to solve this problem, recently, a unit in which a tinsel wire is attached to and integrated with a damper by means such as adhesion or sewing has been provided.
[0005]
As this prior example, for example, Japanese Patent Laid-Open No. 2-134100 exists. This speaker damper has a configuration in which a conductive member corresponding to a tinsel wire is sewn to a damper material.
[0006]
As another prior example, Japanese Utility Model Laid-Open No. 4-71099 exists. In this prior example, a lightweight foam made of urethane-based foamed resin is bonded and fixed to a damper, and a tinsel wire is attached to the lightweight foam.
[0007]
[Problems to be solved by the invention]
However, in the former JP-A-2-134100, the conductive member is sewn from the inner peripheral portion to the outer peripheral portion using a sewing machine and a thread along the shape of the corrugation, so that the work is complicated and the productivity is low. There was a problem that the followability during operation was bad.
[0008]
Moreover, in the latter actual Japanese Utility Model Publication No. 4-71099, a process of adhering a lightweight foam to a damper and a process of attaching a tinsel wire on the lightweight foam are necessary. Since the lightweight foam is mounted on top of the corrugation pile, the thickness of this portion is greatly increased, and there is a problem that the need for reducing the thickness of the speaker cannot be met.
[0009]
The present invention has been proposed in view of the above, and the object of the present invention is to provide a damper for a tinsel wire-mounted speaker that is easy to manufacture, has excellent followability, and is suitable for thinning a speaker, and its manufacture It is to provide a method.
[0010]
[Means for Solving the Problems]
In the present invention, the outer peripheral edge 3 of the damper main body 1A is formed along the shape of the corrugation 2 on one surface a of the damper main body 1A provided with a plurality of concentric corrugations 2 by thermoforming a cloth base material. In the speaker damper in which the tinsel wire is mounted in the direction connecting the inner peripheral end 4 to the inner circumferential end 4, the tinker wire is composed of a circular knitted silk wire 5 and is provided between the damper main body 1A and the circular knitted silk yarn wire 5. The polyurethane 6 is integrated by heat fusion to achieve the above object.
[0011]
In addition, the tinsel wire is a unit bronze wire in which a copper foil of a core wire diameter of 0.10 mm or less is rolled to 1/4 or less of the wire diameter is wound around a 40-unit yarn of the center yarn or a double twisted meta-aramid fiber. By using the circular knitted bronze wire 5 made of a circular knitting having a structure in which 4 to 16 yarns are gathered, the weaving pitch is 15.2 ± 0.76 mm / time, and the wire is not easily damaged during heating and pressurization, Has achieved.
[0012]
The bronze yarn is a unit bronze yarn in which a copper foil with a core wire diameter of 0.10 mm or less is crushed to 1/4 or less of the wire diameter is wound around a central 40th single yarn or a double twisted meta-aramid fiber. Round knitting with a structure that gathers one or more nylon yarns out of 4 to 16 wires, and has a weaving pitch of 15.2 ± 0.76 mm / time and does not damage the tinsel wire when heated and pressed The above-mentioned object is achieved by using the round knitted tinsel wire (5).
[0013]
Further, the speaker damper is obtained by impregnating a cloth base material with a thermosetting resin such as a phenol resin, and then placing it on one mold, and placing the belt-like polyurethane 6 on the cloth base material. Further, a circular knitted bronze wire 5 is placed on the belt-like polyurethane 6 along the longitudinal direction, and the other die is pressed and heated and pressed to form a damper main body having a concentric corrugation 2. At the same time as forming 1A, the circular knitted bronze wire 5 is integrated with the damper main body 1A by fusing polyurethane 6, and the polyurethane 6 used in this case is characterized by a flexible polyurethane foam. is doing.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 is a perspective view of a first embodiment of a speaker damper according to the present invention. The damper 1 has a ring shape, and an outer peripheral end 3 of the damper main body 1A along the corrugated corrugation 2 on one surface a of the damper main body 1A on which a plurality of concentric corrugations 2 are formed. A pair of circular knitted bronze wire 5 is arranged through a belt-shaped polyurethane 6 from the inner peripheral end 4 to the inner peripheral end 4, and this polyurethane 6 is made of a soft polyurethane foam, and the circular knitted bronze wire 5 and the damper main body 1A are integrated by fusion. Has been. That is, they are integrated at the time of damper molding, and both the polyurethane 6 and the circular knitted bronze wire 5 are in close contact with the damper main body 1A along the corrugation irregularities.
[0015]
As the damper base material, a woven fabric made of single or mixed spinning of cotton fiber, acrylic fiber, polyester fiber, aramid fiber or the like is used.
[0016]
In addition, the flexible polyurethane foam is used as the polyurethane 6 because the soft polyurethane foam is soft and has good matching with the cloth material, and does not impair the followability. This is because the wire 5 can be firmly integrated with the damper main body 1A, and molding is easy.
[0017]
Further, as the circular knitted bronze wire 5, a copper foil obtained by rolling a copper wire having a core wire diameter of 0.10 m or less to 1/4 or less of the wire diameter is wound around a 40-unit yarn of the center yarn or a double-twisted meta-aramid fiber. 4 to 16 unit tinsel wires are gathered, the weaving pitch is 15.2 ± 0.76 mm / time, and a circular knitting with a structure that hardly damages the tinsel wires during heating and pressurization is used.
[0018]
That is, the conventional circular knitted bronze wire is made up of, for example, 8 unit bronze wires in which a copper foil formed by rolling a copper wire having a core wire diameter of about 0.10 mm is wound around a meta-aramid fiber twisted with 40 center yarns. It is constructed by knitting at a pitch of about 5 mm / times, and this has a problem of damaging the tinsel wire during heating and pressurization because the pitch of the braid is dense, and to prevent this In addition, if the clearance of the mold is wide, there are disadvantages that sufficient adhesive strength after fusion cannot be obtained or desired damper characteristics cannot be obtained.
[0019]
On the other hand, in the present invention, a special circular knitted tinsel wire 5 in which unit tinsel cords are knitted with a rough pitch is used.
[0020]
That is, as described above, the tinsel wire in the present invention is obtained by rolling a copper wire having a bus wire diameter of 0.10 mm or less to a 1/4 or less of the wire diameter on a 40-unit yarn of the center yarn or a meta-aramid fiber of two twists Round knitted silk yarn with a structure of 4 to 16 unit kinks wound with copper foil and a weaving pitch of 15.2 ± 0.76 mm / turn and a structure with a structure that hardly damages the kinshi wire when heated and pressed Since the wire (5) is used and the weave pitch is rough and assembled, it is difficult to break during pressure processing, it is easy to crush, and the diameter becomes flat and easy to thin. Adhesion between the mold gap and the damper cloth material is improved, and the shape of the corrugation 2 is stabilized and the performance as the damper 1 is not impaired. Further, if the circular knitted tinsel wire 5 is thin, the bending performance by vibration is improved, and the durability is also improved.
[0021]
As mentioned above, this circular knitted bronze wire 5 has a woven pitch that is rougher than that used in the past, and is easily crushed and thinned. Therefore, it has excellent flexibility and impairs damper performance. And good performance can be obtained.
[0022]
Thus, in the first embodiment, the pair of circular knitted bronze wires 5 are provided in a series in the diametrical direction from one end to the other end of the outer periphery of the ring-shaped damper main body 1A. Similarly, the strip-like polyurethane 6 is also provided in the diameter direction.
[0023]
The reason for providing a series in the diametrical direction is that productivity is good and vibration balance is good.
[0024]
However, in actual use, except for some special examples, one of the radial portions extending from the inner peripheral end 4 of the opening 7 of the damper main body 1A toward the outer peripheral end 3 of the damper main body 1A. Is used.
[0025]
That is, FIG. 2 shows a perspective view of one example of use in which each circular knitted bronze wire 5 is connected to each terminal connecting portion 13 of the terminal plate 12, and shows an example using the left radial portion side.
[0026]
In FIG. 2, the periphery of the opening 7 inside the damper main body 1A, that is, the inner peripheral end 4 of the damper main body 1A is coupled to the outer peripheral portion of the cylindrical bobbin 10 via an adhesive. In addition, the inner end of each circular knitted bronze wire 5 provided on either radial portion side is electrically connected to a lead wire (not shown) at the beginning and end of winding of the voice coil 11, respectively.
[0027]
The outer end portion of the circular knitted tinsel wire 5 is connected to the terminal connection portion 13 of the terminal plate 12.
[0028]
As is well known, the terminal plate 12 includes an insulating lug plate 14 having a substantially rectangular shape and a pair of terminals 13 a provided on the lug plate 14, and the terminal plate 12 is a frame ( (Not shown).
[0029]
A vibration plate (not shown) is coupled to the bobbin 10, and the outer peripheral portion of the damper main body 1A is coupled to the frame.
[0030]
Next, a manufacturing method of the damper main body 1A having the above configuration will be described.
[0031]
First, a cloth base material having a predetermined shape made of a cloth such as cotton fiber is impregnated with a thermosetting resin such as a phenol resin. After that, each is placed on one mold (not shown), a strip-like polyurethane 6 is placed on the cloth base material, and a pair of the polyurethane strips 6 along the longitudinal direction is further placed on the strip-like polyurethane 6. The circular knitted bronze wire 5 is placed, the other mold (not shown) is pressed and heated and pressed to form the damper main body 1A having the concentric corrugation 2 and at the same time the polyurethane 6 is melted. The circular knitted tinsel wire 5 can be easily integrated with the damper main body 1A by wearing, and the damper 1 according to the present invention described above can be manufactured.
[0032]
As an application example of the above embodiment, when nylon yarn is mixed in the tinsel wire, the adhesive strength and durability of the tinsel wire can be improved.
[0033]
That is, in this case, the tinsel wire is wound with a copper foil in which a copper wire having a bus wire diameter of 0.10 mm or less is pressed to ¼ or less of the wire diameter around a 40-unit yarn of the center yarn or a double twisted meta-aramid fiber. Units of 4 to 16 units of nylon yarn, and one or more nylon yarns are gathered, and the weaving pitch is 15.2 ± 0.76 mm / time, which does not damage the wire when heated and pressed It has a circular knitting structure.
[0034]
According to this, the nylon yarn melts and hardly damages the tinsel wire at the time of heat and pressure molding, and the nylon yarn is fused as a binder. Strengthens and improves durability.
[0035]
FIG. 3 shows a perspective view of a second embodiment of the present invention.
[0036]
This embodiment is characterized in that the strip-like polyurethane 6 and the pair of circular knitted bronze wires 5 are provided only on one radial portion side of one surface a of the ring-shaped damper main body 1A.
[0037]
In this case, since the material of the polyurethane 6 and the circular knitted bronze wire 5 is half as compared with the first embodiment, the material cost can be saved accordingly.
[0038]
Other configurations and manufacturing methods are basically the same as those of the first embodiment.
[0039]
FIG. 4 shows a perspective view of the third embodiment of the present invention.
[0040]
In this embodiment, in order to correspond to the shape of the terminal board and the like, the belt-like polyurethane 6 and the pair of circular knitted bronze wires 5 are connected from the inner peripheral end 4 to the outer peripheral end 3 at the radius portion of one surface a of the damper main body 1A. It is characterized in that it is provided so as to spread in a substantially C shape toward the top.
[0041]
Other configurations are the same as those of the first embodiment.
[0042]
【The invention's effect】
As described above, according to the present invention, the circular knitted bronze wire 5 does not need to be sewn to the damper main body 1A one by one, and can be integrated with the damper main body 1A via the polyurethane 6, so that the manufacture is easy and the weave pitch of the wire Since they are gathered roughly, they are less likely to break during pressure processing, have good deformability and adhesion, and are excellent in manufacturability from this aspect as well.
[0043]
The circular knitted bronze wire 5 of the present invention can be easily deformed at the time of heat and pressure molding and has good adhesion to the damper main body, so that it can be provided on the damper main body 1A along the shape of the corrugation 2. Therefore, it is possible to obtain a damper 1 that is excellent in followability and suitable for thinning a speaker.
[Brief description of the drawings]
FIG. 1 shows a perspective view of a first embodiment of the present invention.
FIG. 2 shows a state in which the first embodiment of the present invention is connected to a terminal board.
FIG. 3 shows a plan view of a second embodiment of the present invention.
FIG. 4 shows a plan view of a third embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Damper 1A Damper main body 2 Corrugation 3 Outer peripheral end 4 Inner peripheral end 5 Circular braided tinsel wire 6 Polyurethane 7 Opening 10 Bobbin 11 Voice coil 12 Terminal board 13 Terminal connection part 13a Terminal 14 Lug board a One surface

Claims (5)

A damper base body (1) having a plurality of concentric corrugations (2) formed by thermoforming the cloth base material is arranged along one side (a) along the shape of the corrugation (2). 1A) in a speaker damper having a tinsel wire mounted in a direction connecting the outer peripheral end (3) and the inner peripheral end (4), the tinsel wire is composed of a round knitted tinsel wire (5) and a damper main body (1A). ) And a circular knitted tinsel wire (5), which is integrated by thermal fusion of a strip-like polyurethane (6). Kinshi wire is composed of 4 units of Kinshi wire made by winding copper foil with a core wire diameter of 0.10 mm or less rolled to 1/4 or less of the wire diameter around 40 central yarns of single yarn or two twisted meta-aramid fibers. It is characterized by comprising a round knitted bronze wire (5) which is a circular knitted structure having a structure in which -16 pieces are assembled and the weaving pitch is 15.2 ± 0.76 mm / time and the wire strand is not easily damaged during heating and pressurization. The damper for speakers according to claim 1. The Kinshi wire is a unit Kinshi wire made by winding a copper foil with a core wire diameter of 0.10 mm or less to a 1/4 or less of the wire diameter around a 40-th single yarn of the central yarn or a meta-aramid fiber with two twists. One or more nylon threads out of 4 to 16 are assembled, and the weaving pitch is 15.2 ± 0.76 mm / time, and the circular knitting has a structure that does not damage the tinsel wire when heated and pressed. The speaker damper according to claim 1, comprising a circular knitted tin wire (5). 4. The manufacturing method according to claim 1, 2, or 3, wherein the cloth base material is impregnated with a thermosetting resin such as a phenolic resin and then placed on one mold, and the cloth base material is provided. Place the strip-shaped polyurethane (6) on the top, further place the circular knitted tinsel wire (5) on the strip-shaped polyurethane (6) along the longitudinal direction, and press the other mold. By forming by heating and pressing, a damper main body (1A) having a concentric corrugation (2) is formed, and at the same time, a circular knitted tinsel wire (5) is integrated with the damper main body (1A) by fusing polyurethane (6). A speaker damper manufacturing method characterized by comprising: 5. The method for manufacturing a speaker damper according to claim 4, wherein the polyurethane (6) is a flexible polyurethane foam.

Images