JPH0677397U - Insulated lead wire for electroacoustic transducer - Google Patents

Abstract

(57) [Abstract] [Purpose] A flexible electric wire for supplying electricity to the vibrating parts of an electroacoustic transducer and having a high degree of refraction. [Structure] A structure in which a ribbon-shaped foil wire of copper or a copper alloy having microcrystalline paraffin adhered to the surface is wound around a flexible core wire and a plurality of strands are twisted and braided together.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention, as shown in FIG. 4, includes a vibrating component such as a voice coil (12) of an electroacoustic transducer of a general speaker (10) and terminals (14) attached to a fixing member such as a frame (13). The present invention relates to an insulated lead-out wire (30) for an electroacoustic converter, which has a high flexibility and a high degree of refraction resistance, which is connected to an electric wire.

[0002]

[Prior art]

 As shown in Fig. 4, the lead wire (30) that transmits the current to the vibrating parts such as the voice coil (12) of the speaker (10) has a low voltage at a low voltage and a low resistance value to allow a large current to flow. , Holds a large electric capacity, vibrating plate (11), voice coil (12), etc. without adding additional load to light weight and flexibility, smoothly moving flexibility, wear and tear of constituent materials It must have physical properties such as long-life characteristics that affect the life of the speaker (10), such as excellent wear resistance, humidity resistance, and sulfide gas resistance.

[0003] Therefore, a conventional lead wire of this type is a ribbon wire formed by vapor-depositing a metal coating such as copper or brass on a thin ribbon of synthetic resin such as polyethylene, or a plurality of ribbon-shaped copper foil wires such as cotton. In the speaker assembly process, after pulling out the lead wire in a speaker assembly process after twisting multiple strands of wire around a flexible core wire into a lead wire that retains flexibility and cutting it to the required length It was connected by soldering to the necessary parts.

Further, particularly in a lead wire used for an in-vehicle speaker, corrosion resistance and wear resistance are required. Therefore, by dipping the lead wire in the microcrystalline paraffin, the microcrystalline paraffin is removed. There is also an attempt to impregnate a drawn-out electric wire to reduce friction between the copper foil wires during vibration to improve flexibility and further improve corrosion resistance.

[0005]

In such a conventional lead wire, the copper foil wire rubs against each other when vibrating in the above-mentioned configuration, so that the wear is severe, the bending resistance is poor, and the wire is directly exposed to the atmosphere. There is also a problem of poor corrosiveness.In the latter structure, the impregnated microcrystalline paraffin adheres to the copper foil wire to some extent, so friction is slightly reduced, bending resistance is somewhat improved, and corrosion resistance is also improved. Improves somewhat.

However, in the latter configuration, a copper foil wire is wound around a core wire to form an element wire, and a plurality of the element wires are twisted together and impregnated with microcrystalline paraffin. Since there are almost no gaps formed between the core wire and the core wire, and between the wires, there is a problem that the microcrystalline paraffin cannot be sufficiently impregnated, and the effect cannot be obtained to a practical level. there were.

[0007]

[Means for Solving the Problems]

 The present invention is intended to provide a leader wire having excellent flexibility and corrosion resistance that solves the above problems, and the configuration of the present invention is shown in FIGS. 1 to 4 corresponding to the embodiment. The ribbon-shaped foil wire (1) of copper or copper alloy with microcrystalline paraffin (4) attached to the surface is wound around a flexible core wire (2) to form a plurality of strands (3). This is an insulated and drawn-out electric wire for an electroacoustic transducer, which is characterized by being braided by main twisting.

[0008]

[Action]

 In the present invention, a metal ribbon foil having microcrystalline paraffin attached on its surface is wound around a flexible core wire such as cotton to form an element wire, and a plurality of the element wires are twisted and braided to form a leader wire. As a result, friction is reduced by the microcrystalline paraffin present between the metal ribbon foil of the wire and the core wire, and between the metal ribbon foil and the wire of the lead wire, resulting in the reduction of damage. , Flexibility is improved.

Further, since the metal ribbon foil is surrounded by the microcrystalline paraffin, it is possible to prevent corrosion due to moisture, sulfide gas or the like without directly contacting the atmosphere.

[0010]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 are views showing an embodiment of the present invention. FIG. 1 shows a process for attaching a paraffin of the present invention, FIG. 2 shows a structure of a strand (3), and FIG. 3 shows a lead wire of the present invention. The structure of each is shown.

As shown in FIG. 1, a copper alloy ribbon wire (1) having a width of 0.33 mm and a thickness of 0.026 mm is supplied from a supply reel (7a), and MP83 ° C. microcrystalline paraffin (4) is supplied. After immersing it in the molten liquid tank (4a) of (holding at 150 ° C) and pulling it up while squeezing extra microcrystalline paraffin to attach the microcrystalline paraffin to the surface of the copper alloy ribbon foil wire, take it up on the take-up reel (6 ). The copper alloy ribbon foil wire (1) is wound around a core wire (2a) of cotton or the like by a known curling machine to obtain an element wire (3) shown in FIG.

Then, a plurality of the strands (3) are twisted and braided by a known bag knitting machine to obtain a leader line (30) shown in FIG.

In the above embodiment, the plurality of strands (3) are braided by twisting each other, but the plurality of strands (3) may be wound around or braided on a core wire such as cotton.

Although the embodiments considered to be typical of the present invention have been described above, the present invention is not necessarily limited to only the structures of these embodiments. The present invention can be carried out by appropriately modifying it within a range that achieves the object of the present invention and has the following effects.

[0015]

[Effect of device]

 The lead wire A obtained in the example shown in FIG. 3, the lead wire B of the related art, and the lead wire C obtained by impregnating the lead wire of the related art with microcrystalline paraffin are respectively subjected to a bending test (the number of times of bending: 70 times / minute, bending). Angle: 180 °) and the results shown in Table 1 below were obtained.

[Table 1]

As is clear from the above results, in the lead wire of the present construction, a metal ribbon foil having microcrystalline paraffin attached on its surface is wrapped around a flexible core wire such as cotton to form a strand. Since a plurality of strands are twisted together and braided to form a lead wire, friction between the metal ribbon foil of the wire and the core wire and between the metal ribbon foil and the lead wire of the lead wire is reduced. As a result, the damage is reduced, and as a result, the flexibility is improved.

Further, since the metal ribbon foil is surrounded by the microcrystalline paraffin, it does not come into direct contact with the atmosphere and can be prevented from being corroded by moisture, sulfide gas or the like. As a result, these effects have made it possible to extend the service life of the lead wire.

[Brief description of drawings]

FIG. 1 is a block diagram showing a manufacturing process of a wire according to an embodiment of the present invention.

FIG. 2 is an external view showing the structure of an element wire according to an embodiment of the present invention.

FIG. 3 is an external view showing a structure of a lead wire according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of a general speaker.

[Explanation of symbols]

 (1) Metal foil ribbon wire (2) Flexible core wire (3) Element wire (4) Microcrystalline paraffin (4a) Microcrystalline paraffin melting tank (6) Take-up reel (7a) Supply reel (10) Speaker ( 11) Vibration plate (12) Voice coil (13) Frame (14) Terminal (30) Lead wire

Claims (1)

[Scope of utility model registration request] 1. A core wire having flexibility, comprising a ribbon-shaped foil wire (1) of copper or copper alloy having microcrystalline paraffin (4) attached to the surface thereof.
An insulated lead-out wire for an electroacoustic transducer, comprising a plurality of strands (3) wound around (2) twisted together and braided.