JPH0744155Y2 - Center holding member for speaker - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a damper material, an edge material, or the like which, when vibrating a diaphragm having a cone shape, a diaphragm shape, a flat shape or the like, holds the diaphragm in the center and assists its movement. The present invention relates to a speaker center holding member.

[0002]

2. Description of the Related Art Among members constituting a speaker, a diaphragm is supported at a correct position, and an edge having a proper softness so that the diaphragm moves linearly with respect to an electric input, and a voice coil. The center holding member such as a damper that keeps the diaphragm and voice coil in the correct position in a stationary state does not touch the pole piece or the yoke on the side of the gap when the There is a demand for a material that can affect any amplitude with appropriate softness to the vibration of the diaphragm because it has an influence and has the same amplitude, and that can control lateral movement sufficiently.

Conventionally, as a material required for such a center holding member, a biaxial woven fabric in which a warp 1 and a weft 2 shown in FIG. 2 are woven by intersecting each other at 90 degrees, and two as shown in FIG. A triaxial woven fabric in which warp yarns 3 and 4 are woven with one weft yarn 5 intersecting at an angle of 45 to 60 degrees is used.
A shaft woven fabric is impregnated or coated with a molding agent such as a resin and molded into a required shape.

[0004]

Among the materials used for the center holding member, the biaxial woven fabric has anisotropy in the direction of 45 degrees, so that the biaxial woven fabric is easily deformed due to pulling from an oblique direction, and resin or the like is used. When the molding agent is impregnated or applied and hot press molded, the resulting damper or edge is distorted,
This is a factor that causes rolling and the like with respect to the vertical movement of the diaphragm.

On the other hand, a triaxial woven fabric in which two warps cross one weft at an angle of 60 degrees does not have the above-mentioned drawbacks of the biaxial woven fabric, and basically bends and stretches. Has a lot of practical advantages such as isotropic property, large shear resistance, tear resistance, and rupture resistance, which is stronger than biaxial woven fabrics, can be used for threading, saving raw materials, and can be woven lightly. As a result, it is being used more often in diaphragms and center holding members.

However, most of the conventional triaxial fabrics are
As shown in FIG. 3, since only one yarn was used in one direction, the dimensional stability was extremely poor. Therefore, even if a small tensile force is applied from above and below in the direction of the arrow shown in FIG. 3, a large extension occurs in the direction in which the force is applied as shown in FIG. Moreover, this extension has a drawback in that there is almost no restoring force, and therefore dimensions such as the width of the fabric change greatly.

The center holding member for holding the vibration plate such as a damper or an edge at the center is obtained by impregnating or applying a molding agent onto a biaxial or triaxial fabric as described above and hot pressing it. Since it is molded into the required shape, a triaxial woven fabric with one thread intersecting in three directions shown in FIG. 3 has a sufficient force (tensile force) to deform it as shown in FIG. Since the center holding member after molding is applied in the direction, the gaps between the threads become uneven as shown in FIG. 4,
Moreover, since the warp yarns 3 and 4 are not in a linear state, the shape of the gap C formed by the yarns crossing each other at a predetermined angle is C ₁ , C ₂ , C ₃ as shown in FIG. It deforms into a large gap and a small gap, and does not become an accurate hexagonal shape. As a result, the obtained center holding member has distortion, which causes rolling, and when the gap between the yarns becomes large, the vibration of the diaphragm causes the yarn in that portion to move in the vertical direction. Since it cannot withstand the exercise of, it had many problems to be solved in terms of strength.

In view of the present situation, the present invention has a center holding member which can follow any amplitude with appropriate softness with respect to the movement of the diaphragm, and in particular, a thread that crosses even if a force acts in the circumferential direction. It is an object of the present invention to provide a speaker center holding member capable of uniformly maintaining a gap between a yarn and a thread, making a vertical movement of a diaphragm a linear movement, suppressing rolling and the like, and allowing a smooth movement. is there.

[0009]

In order to achieve the above object, the speaker center holding member of the present invention has at least two parallel wefts and two sets of warps similar to the wefts intersect at a predetermined angle. When triaxial weaving, one warp yarn crosses one weft yarn at an upper angle, one warp yarn crosses one lower yarn, and the other warp yarn crosses one lower yarn. One of the warps is on the lower side, the other is on the upper side, and the three warp yarns are woven to form a triangular gap between the weft yarns and the warp yarns to form a triaxial woven fabric. The shaft woven fabric is characterized in that it is impregnated or coated with a molding agent such as phenol resin, and is molded into a required shape by hot press molding. More specifically, two parallel warp threads and another two parallel warp threads intersecting this warp thread at a predetermined angle are crossed with two parallel weft threads at a predetermined angle. In the triaxial woven fabric, one of the two warps intersecting with each other is above one weft, and one other warp intersecting with each other is above the one warp. The above-mentioned 2 which intersects below the weft and intersects above the one weft, respectively.
The warp of one book is below the other weft, and the two other warps that intersect below the one weft cross above the one weft respectively. The triaxial woven fabric, which is formed by repeatedly weaving and forming a triangular gap between the warp and the weft, is impregnated or applied with a molding agent such as phenol resin, and is molded into a desired shape by hot press molding. It is characterized by.

The speaker center holding member of the present invention is specifically a damper or an edge. In addition to cotton, synthetic yarns such as polyamide fibers, carbon fibers, and glass fibers having a high strength and a high elastic modulus are preferable as the yarns forming the triaxial woven fabric. The yarns forming the weft yarns and the warp yarns are At least two are parallel, and differ depending on the member to be obtained and the thickness and material of the thread used. The intersection angle formed by each of the weft yarns and the warp yarns formed by the two parallel yarns is basically 60 degrees, but depending on the member to be molded and its shape, for example, the intersection angle is 50 degrees. It may be 80 degrees.

[0011]

When the triaxial woven fabric is woven, the speaker center holding member of the present invention uses at least two parallel weft yarns and two sets of warp yarns similar to the weft yarns, and aligns each of these two yarns. Since they are woven differently from each other and do not cross each other, the tensile strengths in all directions are almost equal, and the dimensional stability against tensile force is extremely good. Therefore, a damper or edge obtained by impregnating or coating such a triaxial woven fabric with a molding agent and molding it into a required shape by hot pressing has a uniform gap over the entire surface of the member and There is almost no distortion.

[0012]

FIG. 1 shows a triaxial woven fabric as a base material of a center holding member for a speaker according to the present invention. A set of two wefts 6a and 6b made of polyamide fiber and a pair of weft yarns made of polyamide fiber are used. A set of warp yarns 7a and 7b and a set of two warp yarns 8a and 8b have a flat design so that the crossing angle of each yarn is 60 degrees. That is, the weft 6a and the warp 7
a and 8a pass through the upper side, warp yarns 7b and 8b pass through the lower side, and conversely, for weft yarn 6b, warp yarns 7a and 8a pass through the lower side, and warp yarns 7b and 8b pass through the upper side. The other wefts and warps are woven repeatedly to form a regular triangular clearance C having an internal angle of 60 degrees at the intersection of the warp and the weft. The triaxial woven fabric thus obtained is cut into a size required for molding a center holding member, for example, a damper, which is used as a molding die, impregnated or coated with a molding agent made of, for example, a phenol resin, and hot-pressed. It is molded into a predetermined shape.

[0013]

[Effect of the Invention] The speaker center holding member of the present invention is
Two parallel warp threads intersect with another two parallel warp threads at a predetermined angle, and each two warp threads intersect two parallel weft threads at a predetermined angle, and each of these two warp threads A unique triaxial woven fabric woven by entwining the upper side and the lower side without weaving two wefts aligned with each other is impregnated or applied with a molding agent such as phenol resin, and then formed into a desired shape by hot press molding. The molded center holding member has a substantially uniform gap on the entire surface and has almost no distortion in the circumferential direction. Therefore, the rolling caused by the center holding member when the output of the speaker is increased is suppressed, and the vertical movement of the diaphragm can be always held in a linear movement, so that the voice coil of the voice coil caused by the rolling is suppressed. It has a great practical advantage such that abnormal noise due to contact with a yoke or a plate can be prevented.

[Brief description of drawings]

FIG. 1 is a base material of a holding member for a speaker of the present invention.
It is an enlarged plan view of a shaft fabric.

FIG. 2 is an enlarged plan view of a biaxial woven fabric which is a base material of a conventional speaker holding member.

FIG. 3 is an enlarged plan view of a triaxial woven fabric using one thread in one direction, which is a base material of a conventional speaker holding member.

FIG. 4 is an enlarged plan view showing a state in which a tensile force is applied to the triaxial woven fabric shown in FIG.

FIG. 5 is a partially enlarged plan view of a damper formed by using the triaxial fabric shown in FIG.

[Explanation of symbols]

 6a Weft 6b Weft 7a Warp 7b Warp 8a Warp 8b Warp C Gap

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koji Nakazawa 2-3-7 Irifune, Chuo-ku, Tokyo Asahi Jigyo Co., Ltd. (56) Reference JP-A-2-288798 (JP, A) 62-33438 (JP, Y2)

Claims (3)

[Scope of utility model registration request] 1. A weft yarn for at least two parallel weft yarns.
2 sets of warp yarns similar to the above are crossed at a predetermined angle and triaxial weave
In doing so, each weft thread crosses at a predetermined angle.
One of the warps crosses on the upper side and the other one on the lower side.
One of the above warps is on the lower side, and the other one is on the other side.
The books intersect at the top and the triangular gap between the weft and the warp.
A speaker characterized in that a triaxial woven fabric is formed by weaving so that spaces are formed, and the triaxial woven fabric is impregnated with or applied with a molding agent such as phenol resin, and this is molded into a required shape by hot press molding. Center holding member. 2. The speaker center holding member according to claim 1,
A center holding member for a speaker, which is a damper material. 3. The speaker center holding member according to claim 1,
A center holding member for a speaker, which is an edge material.