JPH05314830A - Coaxial cable with connector having l-shaped bent part - Google Patents

Abstract

PURPOSE:To provide a coaxial cable with a connector having an L-shaped bent part which is easily worked and reduces cost. CONSTITUTION:A straight connector 7 is mounted on a terminal of a coaxial cable 1, while a thermally contracted tube 8 having a hot melt layer on the inside is coated on the coaxial cable 1 connected to the connector 7. The part of the thermally contracible tube 8 as well as the part of the coaxial cable 1 that is coated with the tube are bent into the letter L, and the L-shaped bending is retained by the bending work carried out directly after the thermal contraction of the thermally contractible tube 8 as well as by the tube that is fixed and molded by cooling under the bent condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave cable with a connector of the microwave class, and more particularly to a coaxial cable of this type in which the end of the connector is L-shaped.

[0002]

2. Description of the Related Art In order to give an L-shaped bent shape to a terminal portion with a connector of a coaxial cable, a straight type connector is used to make the connector itself L-shaped or simpler. Use things, and
Attach a metal pipe or metal fitting to the end of the cable and bend the metal part into an L shape, or peel off the jacket of the end of the cable and bend it into an L shape, and then melt or solder the exposed outer conductor with a bell or bell. The structure of pouring and cooling to maintain the shape, or bending the end of the cable into an L shape and molding the portion with plastic or the like has been adopted.

[0003]

Since the L-shaped connector of the present invention covers the microwave band, a high degree of accuracy is required, the manufacturing cost is significantly increased as compared with the straight type connector, and the shape is complicated. As a result, the cost of processing the terminals was inevitably increased.

In the case of (1), a large amount of labor is required for bending the metal part, in the case of (2), it takes a long time to inject and process the molten solder or bell, and in the case of (2), the molding die for molding is used. However, there are problems in terms of cost and workability during processing.

The present invention has been made in view of the problems of the prior art described above, and an object thereof is to provide a coaxial cable with a connector having an L-shaped bent portion which is easy to process and is low in cost.

[0006]

According to the coaxial cable provided by the present invention, a straight type connector is attached to the end of the coaxial cable, and a hot melt layer is formed on the inside of the portion of the coaxial cable connected to the connector. The heat-shrinkable tube is covered, and the heat-shrinkable tube and the portion of the coaxial cable covered by the heat-shrinkable tube are bent into an L-shape, and the L-shaped bend is for heating the heat-shrinkable tube. The tube is held by the tube that is solidified and formed based on the bending process immediately after contraction and the cooling in the bending state.

[0007]

1 shows an embodiment of a coaxial cable with a connector having an L-shaped bent portion according to the present invention, and FIG.
Shows a cross-sectional structure of the coaxial cable.

The coaxial cable 1 is used for a microwave grade, and has a central conductor 2 made of silver-plated annealed copper wire having a wire diameter of 0.912 mm and a 1.04 mm thick outer conductor coated with a central conductor. 1. A sintered insulator 3 made of fluororesin (PTFE) and having a thickness of 0.05 mm and a width of 2.
A winding layer 4 of 5 mm silver-plated copper foil and a braid 5 of silver-plated annealed copper wire having a wire diameter of 0.1 mm are applied to form an outer conductor 4, and the outer periphery of the outer conductor 4 is further coated with a fluororesin (PFA The outer jacket 6 is provided.

A straight type connector 7 is attached to the coaxial cable 1 at its end. Then, a heat-shrinkable tube 8 is covered from the connector mounting portion to the end portion of the coaxial cable, and at that portion, L
It is bent into a letter shape.

The heat-shrinkable tube 8 has a hot melt adhesive layer on the inner surface of a polyolefin body, and is bent into an L-shape immediately after being heat-shrinked by covering a predetermined cable portion as described above. The tube is cooled in that bent state, and a predetermined L-shaped bent shape is maintained by utilizing the fact that the hot melt layer inside the tube is solidified.

[0011]

According to the coaxial cable with a connector having the L-shaped bent portion of the present invention as described above, a straight type connector can be used as the connector to simplify the cable portion into an L-shape. In addition, such L-shaped bending uses a heat-shrinkable tube having a hot-melt layer on the inner side, and holds the predetermined bent shape by utilizing the fact that the inner hot-melt layer is solidified by cooling after heat-shrinking. Since this is done, the processing cost can be greatly reduced by a simple operation.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of a coaxial cable with a connector having an L-shaped bent portion according to the present invention.

FIG. 2 is an explanatory cross-sectional view of the same coaxial cable.

[Explanation of symbols]

 1 coaxial cable 2 center conductor 3 insulator (PTFE) 4 silver-plated copper foil winding layer 5 braided copper wire 6 jacket (PFA) 7 straight connector 8 heat-shrinkable tube

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yachikan Takezo 5-1-1 Hidakacho, Hitachi City, Ibaraki Prefecture Hitachi Cable Hidaka Plant (72) Inventor Masahiro Yamamoto Hidaka, Hitachi City, Ibaraki Prefecture 5-1-1, Machi, Hitachi Cable Co., Ltd. Hidaka Factory

Claims (1)

[Claims] 1. A straight connector is attached to an end of a coaxial cable, and a portion of the coaxial cable connected to the connector is covered with a heat-shrinkable tube having a hot melt layer inside thereof. The heat-shrinkable tube and the portion of the coaxial cable covered by the heat-shrinkable tube are bent into an L-shape. The L-shaped bend is used for bending the heat-shrinkable tube immediately after heat shrinking and cooling in the bent state. A coaxial cable with a connector having an L-shaped bent portion, characterized in that the coaxial cable is held by the tube that is solidified and molded based on the above.