JP3023716B2 - Coaxial cable with connector and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coaxial cable with a connector and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a connector is connected to an end of a coaxial cable by exposing a center conductor at the end of the coaxial cable and folding back an external conductor to connect the connector. This connection step will be described with reference to FIG.
Is a step of cutting the coaxial cable 31 into a desired length. The coaxial cable 31 includes a center conductor 32, an inner insulator 33 covering the center conductor 32, an outer conductor 34 provided around the center insulator 32,
Further, it is composed of an external insulator 35 covering the periphery thereof. FIG. 3B shows that the inner insulator 33, the outer conductor 34, and the outer insulator 35 are removed at the end of the coaxial cable 31 to expose the center conductor 32, and the outer insulator 35 is removed inside the exposed portion. Then, a step of exposing the outer conductor 34 and fitting a ferrule 36 made of an annular conductor to this portion is shown. FIG. 7C shows the outer conductor 34 folded back so as to cover the ferrule 36, and the connector inner socket contact 36 formed of a cylindrical conductor is fitted to the exposed center conductor 32 by crimping, soldering, welding, or the like. The steps for combining are shown. FIG. 4D shows a step of fitting a cylindrical connector internal insulator 37 so as to cover the internal insulator 33 exposed by folding of the connector internal socket contact 36 and the external conductor 34. FIG. 8E shows a step of fitting a cylindrical connector external conductor 38 to the ferrule 36 covered by the folded external conductor 34 and the cylindrical internal insulator 37 and fixing the ferrule 36 by crimping means. Is shown. Fig. (F)
Shows a step of covering the connector outer conductor 38 and the outer insulator 35 with the shrink tube 39 as necessary.

[0003]

In such a conventional method of manufacturing a coaxial cable with a connector, it is necessary to expose the center conductor at the end of the coaxial cable and to fold the outer conductor. The process is complicated, requires a long time, and is difficult to automate. Accordingly, an object of the present invention is to provide a coaxial cable with a connector which eliminates the above-mentioned conventional disadvantages and a method for manufacturing the same.

[0004]

According to the present invention, there is provided an inner conductor having a predetermined length, comprising a center conductor and an insulator covering the center conductor, the center conductor being exposed at least at one end.
A ferrule made of an annular conductor fitted to the one end of the portion of the inner conductor covered with the insulator, a cylindrical internal socket contact fitted and fixed to the exposed center conductor, A cylindrical inner insulator mounted to cover the inner socket contact; and a sheet-shaped outer conductor mounted to cover an outer surface of a portion of the ferrule and the inner conductor covered with the insulator. And a ferrule surrounded by the outer conductor and a cylindrical connector outer conductor fitted and fixed to the cylindrical inner insulator portion; and a sheet-shaped fixedly surrounding the outer surface of the sheet-shaped outer conductor. And a coaxial cable with a connector characterized by having the above external insulator.

[0005] The sheet-shaped external conductor is obtained by arranging and fixing a large number of thin external conductors on an adhesive tape. Further, the sheet-shaped external insulator is formed of an adhesive tape-shaped insulator.

According to the present invention, there is also provided a step of forming an inner conductor comprising a center conductor and an insulator covering the center conductor;
The inner conductor formed in this step is cut to a desired length, the insulator is removed at the end to expose the center conductor, and the portion of the inner conductor covered with the insulator is an annular conductor. A step of fitting a ferrule consisting of: a step of fitting a cylindrical internal socket contact to the central conductor exposed by this step, and firmly connecting to the central conductor; and a step of forming a cylindrical internal insulation on the internal socket contact. A step of fitting the body, a step of surrounding the outer surface of the portion covered with the insulator of the ferrule and the inner conductor with a sheet-shaped outer conductor, and a step of surrounding the ferrule and the cylindrical inner portion surrounded by the outer conductor A step of fitting a cylindrical connector outer conductor to an insulator portion and fixing the outer conductor by a caulking means at the ferrule portion; Method for manufacturing a coaxial cable with connector, characterized in that the outer surface and a step of enclosing a sheet-like outer insulation is provided.

[0007]

1 is a diagram showing a coaxial cable with a connector according to the present invention in the order of manufacturing steps. First, in the step (A), the inner conductor 11 constituting the coaxial cable is prepared. The inner conductor 11 includes a center conductor 12 and an insulator 13 covering the center conductor 12. In the step (B), the inner conductor 11 is cut to a desired length, the insulator 13 is removed at both ends to expose the center conductor 12, and the portion of the inner conductor 11 covered with the insulator 13 is removed. A ferrule 14 made of an annular conductor is fitted. In the step (C), a cylindrical connector internal socket contact 15 is fitted to the exposed center conductor 12 and fixedly connected to the center conductor 12. In the step (D), a cylindrical connector internal insulator 16 is fitted to the connector internal socket contact 15. The diameter of the distal end portion of the connector internal insulator 16 is gradually reduced to form a tapered portion 17.

[0008] In the step (E), the outer surfaces of the ferrule 14 and the insulator 13 are surrounded by a sheet-shaped external conductor 18. This sheet-shaped external conductor 18 is formed by arranging and fixing a large number of thin linear external conductors 20 on an adhesive tape 19. In the step (F), the cylindrical connector external conductor 21 is fitted to the ferrule 14 and the connector internal insulator 16 surrounded by the sheet-shaped external conductor 18, and the ferrule 14 is fixed by caulking means.
In the caulking portion 22, the connector outer conductor 21 is electrically connected to the sheet outer conductor 18. The distal end 23 of the connector outer conductor 21 is also formed in a tapered shape.
In the step (G), the outer surface of the sheet-shaped outer conductor 18 surrounding the inner conductor 11 is surrounded and covered with a sheet-shaped outer insulator 24. The sheet-shaped external insulator 24 is an adhesive tape-shaped insulator, which is wound around the sheet-shaped external conductor 18 and fixed. In the step (G), the periphery of the external insulator 24 is covered with a tube 25 made of a shrinkable resin as needed.

The coaxial cable with connector obtained in this manner comprises a central conductor 12 and an insulator 1 covering the same.
3, a ferrule 14 comprising a predetermined length of the inner conductor 11 with the center conductor 12 exposed at both ends, and an annular conductor fitted to both ends of a portion of the inner conductor 11 covered with the insulator 13; 14 and the exposed center conductors 12 on both sides
Cylindrical socket contacts 15 and 15 fitted and fixed to
5, a cylindrical connector internal insulator 16 mounted so as to cover the ferrule 14 and an insulator 13 of the internal conductor 11
A sheet-like outer conductor 20 mounted so as to cover the outer surface of the portion covered with the above, a ferrule 14 surrounded by the connector outer conductor 16 and a cylindrical shape fitted and fixed to the connector inner insulator 16 portion It comprises a connector outer conductor 21 (only one is shown) and an outer insulator 24 fixed so as to surround the outer surface of the sheet-shaped outer conductor 20.

[0010]

According to the present invention described above, in the step of forming the center conductor and the inner conductor made of an insulator covering the center conductor, a cylindrical connector is connected to the center conductor exposed at the cut end. An internal socket contact is fitted and fixedly connected to the center conductor, a ferrule made of an annular conductor is fitted to a portion of the internal conductor covered with an insulator, and then the inner conductor outer surface including the ferrule is formed into a sheet-like shape. Since the outer conductor is surrounded by the outer conductor, a step of folding the outer conductor, which is performed together with the exposure of the center conductor at the end of the coaxial cable as in the related art, becomes unnecessary, and the entire process is simplified. For this reason, there is an advantage that the manufacturing cost of the coaxial cable with a connector is reduced, and it is easy to respond to automation.

[Brief description of the drawings]

FIG. 1 is a diagram showing a coaxial cable with a connector of the present invention in the order of its assembling steps.

FIGS. 2A to 2F are views showing a conventional method of manufacturing a coaxial cable with a connector, and FIGS. 2A to 2F are views showing an assembling process of the coaxial cable with a connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Internal conductor 12 Center conductor 13 Internal insulator 14 Ferrule 15 Connector internal socket contact 16 Connector internal insulator 17 Tapered part 18 Sheet-shaped external conductor 19 Adhesive tape 20 External conductor 21 Connector external conductor 22 Caulked part 24 External insulator 25 Tube

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-1-140572 (JP, A) JP-A-1-60482 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H01R 17/00-17/18

Claims (6)

(57) [Claims] 1. An internal conductor having a predetermined length, comprising a central conductor and an insulator covering the central conductor, the central conductor having at least one end exposing the central conductor, and the one end of a portion of the internal conductor covered with the insulator. A ferrule made of an annular conductor fitted to the outer side, a cylindrical internal socket contact fitted and fixed to the exposed central conductor, and a cylindrical mounting fitted over the internal socket contact. An inner insulator, a sheet-shaped outer conductor mounted so as to cover an outer surface of a portion of the ferrule and the inner conductor covered with the insulator, a ferrule surrounded by the outer conductor, and the cylindrical shape; A cylindrical connector outer conductor fitted and fixed to the inner insulator portion, and a sheet-shaped outer insulator fixed so as to surround the outer surface of the sheet-shaped outer conductor. Coaxial cable with connector. 2. The coaxial cable with a connector according to claim 1, wherein the sheet-like external conductor is formed by arranging and fixing a large number of thin external conductors on an adhesive tape. 3. The coaxial cable with a connector according to claim 2, wherein said sheet-shaped external insulator is formed of an adhesive tape-shaped insulator. 4. A step of forming a center conductor and an inner conductor made of an insulator covering the center conductor, cutting the inner conductor formed in this step to a desired length, and removing the insulator at an end thereof. Exposing the center conductor and fitting a ferrule made of an annular conductor to a portion of the inner conductor covered with an insulator; and forming a cylindrical internal socket contact on the center conductor exposed by this process. Fitting and firmly connecting to the center conductor, fitting a cylindrical internal insulator to the internal socket contact, and removing the outer surface of the ferrule and the portion of the internal conductor covered with the insulator. Enclosing the ferrule surrounded by the outer conductor and a cylindrical connector outer conductor into the cylindrical inner insulator portion; Manufacturing a coaxial cable with a connector, comprising: a step of fixing by a caulking means at a rule portion; and a step of surrounding an outer surface of a sheet-shaped outer conductor surrounding the inner conductor with a sheet-shaped outer insulator. Method. 5. The method for manufacturing a coaxial cable with a connector according to claim 4, wherein the sheet-like external conductor is formed by arranging and fixing a large number of thin external conductors on an adhesive tape. 6. The method for manufacturing a coaxial cable with a connector according to claim 5, wherein said sheet-shaped external insulator is formed of an adhesive tape-shaped insulator.