JP2006202664A - Coaxial cable - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coaxial cable capable of facilitating composition of a circuit structure by carrying out power supply, signal transmission and heat radiation by using a single cable, and of reducing restriction of the installation place of the circuit device by increasing the degree of freedom of the installation place of the circuit device. <P>SOLUTION: This coaxial cable is provided with: a center wire material formed of a heat pipe; an insulating material covering the center wire material for electrically and and thermally insulating the center wire material; and a conductor covering the insulating material. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a coaxial cable that can transmit electric power, a signal, and exhaust heat by a single integrated wire.

  FIG. 3 is a diagram showing a conventional general electronic device whose temperature is controlled. In FIG. 3, reference numeral 10 </ b> A denotes an in-device circuit provided inside the device 10, and 10 </ b> B denotes an outside device circuit provided outside the device 10. Generally, the device external circuit 10B is provided with a circuit having a heat generation property, and the device circuit 10A is provided with a device such as a sensor having a low heat generation property. Between the internal circuit 10A and the external circuit 10B, a power cable 11 that supplies power, an input / output signal line 12 of the apparatus, and a heat radiating duct 13 that discharges consumed heat are provided. As described above, in a device with severe temperature control, it is necessary to provide not only circuit device parts but also parts for measures against heat generation.

As an example in the patent literature, a heat pipe panel for mounting only a heat pipe is provided separately from the device panel, and the device and harness are on the inner surface of the device panel, and the waveguide and the coaxial cable are on the outer surface of the device panel. A technique for mounting is known (see, for example, Patent Document 1).
Japanese Patent Application Laid-Open No. 07-010097

  In the conventional technology, as described above, in order to prevent the heat, in order to connect the circuit inside the apparatus and the circuit outside the apparatus, the power cable 11 that supplies power, the input / output signal line 12 of the apparatus, and the consumed heat are discharged. Although the heat radiation duct 13 is provided, the power supply cable, the signal line, and the heat radiation duct facility become complicated, and the signal line and the like become longer, and the influence of noise and the transmission speed are easily affected. Although not shown, it is necessary to provide a protection circuit, and the circuit portion placed in the apparatus requires many parts such as a heat shielding plate, which increases the overall structure of the apparatus and costs. There is a problem of becoming high.

  The present invention has been made to solve the above-described problems. By using one cable to perform power supply, signal transmission, and heat dissipation, the configuration of the circuit device is simplified, and the circuit An object of the present invention is to provide a coaxial cable that can increase the degree of freedom of the installation location of the apparatus and reduce restrictions on the installation location.

  In order to solve the above-described problems, a coaxial cable of the present invention includes a center wire made of a heat pipe, an insulator that covers the center wire and electrically and thermally insulates the center wire, and covers the insulator. And a conductor.

  As described above in detail, according to the present invention, power supply, signal transmission, and heat dissipation can be performed with a single coaxial cable connected to the circuit device. The restrictions can be reduced, and the number of parts can be reduced to reduce the cost of the circuit device. In addition, a cooling function can be provided to the transmission line by applying it to a transmission line with high power.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a diagram showing a coaxial cable according to an embodiment of the present invention, and FIG. 2 is a diagram showing a configuration of an electronic apparatus corresponding to FIG.
In these drawings, reference numeral 1 denotes one coaxial cable, which connects an in-device circuit 2 and an outside device 3 provided inside the device 10.

  The coaxial cable 1 includes at least three of a center wire 1a made of a heat pipe, an insulator 1b that covers the center wire 1a and electrically and thermally insulates the center wire 1a, and a conductor 1c that covers the insulator 1b. Consists of elements.

  The center wire 1a and the conductor 1c constitute a signal line, and each is appropriately connected to the signal line. For example, the center wire 1a becomes a + side conductor for supplying power and can superimpose a digital signal or an RF signal. The insulator 1b is configured by electric insulation having heat insulation for suppressing heat transmission loss. The conductor 1c protects the insulator 1b and has a pipe shape having conductivity. One end of the heat pipe constituting the center wire 1a is connected to the heat radiating fin as will be described later.

  The in-device circuit 2 includes a heat generating element 2a composed of a circuit or the like, a heat conductive element 2b fixed between the heat generating element 2a and the heat pipe (center wire 1a) and made of a material having high thermal conductivity for transferring heat. And a power line terminal Vcc for receiving power and a signal line terminal S in which a DC component is blocked by a capacitor for transmitting and receiving signals, and the center line material of the coaxial cable 1 is connected to each of the power line terminal Vcc and the signal line terminal S. Each of 1a and conductor 1c is connected. And the heat pipe (center wire 1a) of the coaxial cable 1 is connected to the heat conducting element 2b, and the heat from the heat generating element 2a is transmitted to the heat radiating fin described later.

  The circuit device 3 is provided with the above-described heat radiation fins 3a. The heat radiating fins 3a exchange heat with the refrigerant (air, water), and are well attached to one end of the heat pipe. The other end of the center wire 1a of the coaxial cable 1 and the conductor 1c is connected to the signal line S ′ and the power supply terminal Vcc ′ in the same manner as in the in-device circuit 2.

  As described above, according to the embodiment of the present invention, the power supply, signal transmission, and heat dissipation can be performed with one coaxial cable connected to the circuit device, so that the circuit device can be downsized and installed. Location restrictions can be reduced, and the number of parts can be reduced to reduce the cost of the circuit device. In addition, a cooling function can be provided to the transmission line by applying it to a transmission line with high power.

It is a figure which shows the coaxial cable by embodiment of this invention. It is a figure which shows the structure of the electronic device by embodiment of this invention. It is a figure which shows the structure of the conventional electronic device.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Coaxial cable, 1a Center wire (heat pipe), 1b Insulator, 1c conductor, 2 In-device circuit, 3 Outside circuit, 3a Radiation fin, 10 Device

Claims (1)

A coaxial cable comprising: a center wire made of a heat pipe; an insulator that covers the center wire and electrically and thermally insulates the center wire; and a conductor that covers the insulator.

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