JPS6023857Y2 - coaxial cable - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a coaxial cable suitable for internal and external wiring of audio equipment.

Conventionally, coaxial cables as shown in FIG. 1 have been used for internal and external wiring of audio equipment, such as speaker cords and microphone cords.

That is, the structure is such that 1 is an inner conductor, and an inner insulator 2, an outer conductor 3, and an outer insulator 4 are sequentially provided around the outer periphery of the inner conductor.

In this case, the inner and outer insulators 2 and 4 are often coated by tube extrusion, and the insulator 2.4 is coated with the conductor 1.
, 3, but merely existed in close contact with the conductor 1°3.

Therefore, the conductor 1.3 moves due to the vibration bending of the cable, causing distortion and noise, which has the disadvantage that realistic sound cannot be reproduced.

This invention solves the drawbacks of the conventional coaxial cable mentioned above,
The purpose of this cable is to provide a coaxial cable for audio equipment that can reproduce sharp and excellent sound quality by preventing conductor movement. A coaxial cable consisting of an inner insulator, an outer conductor, and an outer insulator, characterized in that the coaxial cable is constructed by applying a shrink tube around the outer periphery of the conductor to apply constant tightening force. It's on the cable.

An embodiment of the coaxial cable of the present invention will be further explained with reference to FIG. 2. Reference numeral 1 denotes an inner conductor, and the outer circumference of the coaxial cable includes an inner shrink tube 5, an inner insulator 2, an outer conductor 3, and an outer shrink tube. 6 and an external insulator 4 are provided.

As the internal conductor 1, an ultrafine copper stranded wire is used, and the material of the copper wire is preferably oxygen-free copper.

The inner and outer line edges 2 and 4 are made of polyethylene, crosslinked polyethylene, vinyl chloride, or the like, and are coated with an extruder.

As the outer conductor 3, a braided or horizontally wound copper wire is suitable.

The inner and outer shrinkable tubes 5 and 6 are coated with shrinkable tubes that are selected so as to provide constant tightening force.

The shrinkable tubes 5 and 6 are made of polyethylene, cross-linked polyethylene, vinyl chloride, etc.
Shrink tubing that can be shrunk to an inner diameter of 72 mm or less is suitable.

Specifically, a tube stretched to twice its length in the diametrical direction is used, and after being coated on a conductor, the elastic memory performance of the tube is improved by heating it to near or above the crystal transition point of the tube material. This causes contraction in the opposite direction to the stretching direction, and since the tube is coated on the conductor, it is always firmly tightened as a tightening force in the direction of the center of the conductor.

In the coaxial cable of the present invention constructed as described above, the conductor is always tightened due to the presence of the shrink tube around the conductor, and even if the cable is bent or vibrates, the conductor does not move. Therefore, it is possible to reproduce sharp and good sound quality without generating distortion or noise, and has great practical value as an internal/external recording wire material for audio equipment.

[Brief explanation of the drawing]

FIG. 1 is an explanatory cross-sectional view showing an example of a conventional coaxial cable, and FIG. 2 is an explanatory cross-sectional view showing an embodiment of the coaxial cable of the present invention. 1...Internal conductor, 2...Internal insulator,
3... External conductor, 4... External insulator,
5... Internal shrink tube, 6... External shrink tube.

Claims (1)

[Scope of utility model registration request] In a coaxial cable consisting of an inner conductor made of stranded wire, an inner insulator, an outer conductor, and an outer insulator sequentially provided around the outer periphery, fixed tightening is performed on the outer periphery of both the inner and outer conductors. A coaxial cable for audio equipment, characterized in that each cable is made up of shrink tubes that provide force.