JPH04312772A - Terminal processing part of coaxial cable - Google Patents

Abstract

PURPOSE:To make the work to connect a connector with a superfine multicore coaxial cable easy, heighten the mechanical strength, and improve high frequency electric properties by using an auxiliary part. CONSTITUTION:One side of an auxiliary part 4 using a printed substrate is set in the state of being connected with a terminal 2 of a connector 1. After the cable inner conductors of a superfine multicore coaxial cable 3 are connected with the terminal 5 of the auxiliary part 4. bonding is carried out by an adhesive, etc., to cover mechanical strength of the core wire. Next, a conductive layer 8 is formed on the bonding part while having a separator layer 7 between them and then a coaxial outer conductor 9 is connected. Like this way, the connecting part is made large by the auxiliary part to make the connecting work easy, the mechanical strength is heightened by bonding, and using the conductive layer, electric properties such as noise resistance, stroke resistance, etc., are improved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal processing section of a multi-core ultra-fine coaxial cable for transmitting signals to medical equipment such as ultrasonic diagnostic equipment.

0002

[Prior Art] Conventionally, coaxial cables are terminated using special connectors, etc., but multi-core ultra-fine coaxial cables used for signal transmission of medical equipment such as ultrasound diagnostic equipment are thinner than hair. A thin inner conductor (40AWG or 42
AWG), crimping connections, etc. are not possible, and the same processing as conventional methods cannot be performed.

[0003] Furthermore, even when a soldered connection is made, the mechanical strength is weak because the wire core is thin, and it has been necessary to compensate for this.

Furthermore, since medical equipment is used at high frequencies and malfunction cannot be tolerated, noise resistance and crosstalk resistance are improved by making the processing dimensions between the inner conductor and the outer conductor as short as possible. Although improvements are required, it has been extremely difficult to solve these problems within the scope of conventional technology.

[0005]

[Problems to be Solved by the Invention] The present invention solves the drawbacks of the prior art as described above, improves crosstalk resistance and noise resistance, and provides an ultra-fine fabric with excellent mechanical strength and terminal processing workability. This was proposed for the purpose of providing a new terminal processing unit for multi-core coaxial cables.

[0006]

[Means for Solving the Problems] That is, the gist of the present invention is to: (1) assist in enlarging the connection area with the internal conductor in the terminal processing section that connects the ultra-fine multicore coaxial cable to the connector; (1) bonding the wire core to the auxiliary member; (2) providing a separator layer and a conductive layer on the connecting portion between the inner conductor and the auxiliary member, and connecting the outer conductor to the conductive layer. It is something to do.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the terminal processing section of the present invention will be described with reference to the accompanying drawings.

FIG. 1 shows a cross-sectional view of the terminal processing section of the present invention as seen from the front. 1 is a connector for connecting an ultra-fine multicore coaxial cable 3, and 2 is a terminal thereof.

Reference numeral 4 denotes an auxiliary member for facilitating connection, which is one of the features of the terminal processing section of the present invention.One side is connected to the terminal 2 of the connector 1, and the other side is an ultra-fine one as described later. It is connected to a multi-core coaxial cable 3.

As the auxiliary member 4, a printed circuit board or a molded circuit board is used. FIG. 2 shows a step-by-step explanation of how to connect the ultra-fine multi-core coaxial cable 3 to the auxiliary member 4, and is an explanatory view of the auxiliary member 4 seen from above.

FIG. 2(1) is an explanatory diagram showing an auxiliary member 4 provided on the terminal 2 of the connector 1.

FIG. 2(2) is an explanatory diagram showing the inner conductor and outer conductor of the coaxial core of the ultra-fine multicore coaxial cable 3 separated, and the inner conductor connected to the terminal of the auxiliary member 4.

[0013] Reference numeral 6 denotes a bonding portion that is applied after connecting the internal conductors 5, and is used to compensate for the lack of mechanical strength of the ultra-fine wire core, and adhesive, epoxy resin, or the like is used.

The bonding portion 6 protects the connecting portion 5 and at the same time improves mechanical strength by fixing the wire core 3.

FIG. 2(3) shows a separator layer 7 further provided on the bonding part and a conductive layer 8 having a slightly narrower width than the separator layer 7. As shown in FIG. 2(4), the conductive layer The outer conductor of the coaxial core is connected to 8 and constitutes the terminal processing section of the present invention.

The separator layer 7 is for heat insulation when the internal conductor connecting portion 5 is connected to the external conductor 9 and for preventing electrical connection with the conductive layer 8, and is made of a fluororesin film or the like. .

The conductive layer 8 is used for external conductor treatment to improve crosstalk characteristics and noise resistance, and is made of highly conductive metal, conductive plastic, conductive paint, or the like.

Conventionally, a method of connecting the external conductors all at once has been adopted as a method for processing the external conductors, but in order to have excellent crosstalk characteristics and noise resistance, and to withstand high frequency use, It is advantageous to have a structure in which the space between the internal and external conductors of the coaxial cable can be made as short as possible.In the present invention, the conductive layer 8 is provided through the separator layer 7 because of the short dimension. This is to enable processing of the external conductor.

In this case, it is preferable to provide one conductive layer 8 for every two rows of terminals in the vertical direction in FIG. Crosstalk resistance is improved.

[0020]

The terminal processing unit of the present invention constructed as described above has the following advantages and has great industrial value.

[0021] By using an auxiliary member that enlarges the connection part, the connection work becomes easier and the reliability of the connection is improved.

[0022] The bonding material protects the connection part and fixes the cable at the same time, improving mechanical strength.

(2) Since the processing dimensions of the inner conductor and outer conductor are short, electrical characteristics such as noise resistance and crosstalk resistance are improved.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional explanatory diagram, seen from the front, showing one embodiment of a terminal processing section of the present invention.

FIG. 2 is an explanatory diagram of a procedure for configuring a terminal processing section of the present invention.

[Explanation of symbols]

1 Connector 2 Terminal 3 Ultra-fine multicore coaxial cable 4 Connection auxiliary member 5 Internal conductor connection part 6 Bonding material 7 Separator layer 8 Conductive layer 9 External conductor connection part

Claims (4)

[Claims] 1. A coaxial cable characterized in that, in a terminal processing section for connecting an ultra-fine multicore coaxial cable to a connector, an auxiliary member is provided at the connection section of the internal conductor to enlarge the connection section. Terminal processing section. 2. The coaxial cable terminal processing unit according to claim 1, wherein the auxiliary member for enlarging the connection portion is a printed circuit board or a molded circuit board. 3. The coaxial cable terminal processing unit according to claim 1, wherein the coaxial cable core is bonded to the auxiliary member when the coaxial wire core is connected to the auxiliary member. 4. A separator layer and a conductive layer are provided on the connection portion between the inner conductor and the auxiliary member, and the outer conductor is connected to the conductive layer. Coaxial cable terminal processing section.