JPS6344890Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention relates to cables for audio equipment.
More specifically, the present invention relates to a cable suitable for connecting audio devices.

Cables for audio equipment connect amplifiers and speaker systems, microphones and amplifiers, etc., and prevent the transmission signals flowing through the internal conductors from being disturbed by the magnetism emitted by lights, television receivers, and even motors. A typical example is a star quad structure, in which diagonal conductors are connected to each other.

In such a cable, when the cable is bent, the capacitance between the inner conductor and the outer conductor made of the shielding braid changes at that portion, resulting in generation of microphonic noise. Further, in the star quad structure, charges are concentrated in the insulator having the shortest distance between each conductor due to its structure, and a high charge region is generated locally. This highly charged region causes noise and distortion when audio signals are transmitted through the internal conductor. Furthermore, the four internal conductors of the star quad pass current in the same direction through the two diagonally opposite conductors; This creates a flux between the conductors that will be affected by the external alternating electric field.

Therefore, this idea improves the structure in which the capacitance changes between the inner conductor and the outer conductor, suppresses the local generation of high charge regions and the magnetic influence of flux due to the external AC electric field, and achieves low inductance. In order to obtain a cable for audio equipment that does not generate noise, the cable is characterized by a structure in which a conductive layer is provided between the insulator covering the inner conductor and the outer conductor. be.

An embodiment of the cable for audio equipment according to this invention will be described below with reference to the drawings. First, in the figure, reference numeral 1 indicates an internal conductor of a star quad structure, this internal conductor 1 is covered with an insulator, and the outside of the insulator 2 is a conductive material made of a polymer material mixed with carbon to give conductivity. It is covered with a layer 3, its outer side is covered with a braid 4 as an external conductor, and its outermost surface is further covered with an insulating jacket 5.

Since this device has the above-mentioned configuration, there is a gap between the internal conductor 1 and the conductive layer 3, and between the conductive layer 3 and the braid 4.
Each power storage function can be made smaller by dividing each independent power storage function between them, which reduces the noise generated by reducing local capacitance changes that occur when the cable is compressed or bent. I'm keeping it low. Furthermore, by covering the outside of the insulator 2 covering the internal conductor 1 with a conductive layer 3,
Electrostatic shielding is applied to disperse the electric charge generated in the insulator with the shortest distance between internal conductors, suppressing noise and distortion when transmitting audio signals.

Furthermore, since carbon powder, which is a non-magnetic material, is mixed into the polymer material when forming the conductive layer 3, in addition to the electrostatic shielding effect, there is also a magnetic shielding effect, and the flux generated between the internal conductors on the diagonal lines is removed from the outside. Not affected by hysteresis effects caused by alternating electric fields.

As is clear from the above description, the cable for audio equipment according to this invention wraps the internal conductor with an insulator and covers it with a conductive layer containing carbon.
Since the outside is wrapped with a braided outer conductor and further covered with an outer sheath, the power storage function can be divided between the inner conductor and the conductive layer, and between the conductive layer and the braided outer conductor. In addition to suppressing changes in capacitance associated with the magnetic flux, it also suppresses the local generation of high-charge regions and the magnetic influence of external alternating current electric fields on flux, resulting in low inductance, suppressing noise generation, and in particular, achieving a high shielding effect against magnetism. effective.

[Brief explanation of the drawing]

The figure is a partial perspective view showing the cable for audio equipment of this invention. DESCRIPTION OF SYMBOLS 1...Internal conductor, 2...Insulator, 3...Conductive layer, 4...Braid, 5...Outer cover.

Claims (1)

[Scope of utility model registration request] A star quad type audio equipment cable has multiple internal conductors with a star quad structure, an insulator covering each internal conductor, a conductive layer containing carbon that covers the outside of these conductors, and a conductive layer that covers the outside of this conductive layer. a braided outer conductor, which prevents changes in capacitance between the outer conductor and the inner conductor, disperses charges concentrated in the insulator between the inner conductors, and 1. A cable for audio equipment, characterized in that the flux generated between internal conductors facing each other is magnetically shielded by the carbon-mixed conductive layer.