JP2005149972A - Caulking method of coaxial connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a caulking method of a coaxial connector for producing the connector at a low cost without having to cut an external conductor and without lacking of caulking strength. <P>SOLUTION: A notch part 5a is provided at a ferrule 5 of a cable 2. Each shield wire 2c of the cable 2 is folded and tips of a part of folded each shield wire 2c are positioned at the notch part 5a of the ferrule 5. A part of the conductor 4 and tips of the part of the folded each shield wire 2c are engaged with the notch part 5a by caulking a spot of the conductor 4 corresponding to the notch part 5a from the outside. By producing the connector in such a caulking method, the caulking strength is increased. A failure in a short circuit inside the connector is prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for manufacturing a coaxial connector, and more particularly to a method for caulking an outer conductor or the like in a coaxial connector.

  A conventional caulking method for the coaxial connector according to the first technique will be described with reference to FIGS. The outer conductor of the coaxial connector is processed by cutting. 10 is a cross-sectional view of the coaxial connector (however, a ferrule and a cable outside the outer conductor are external views), FIG. 11 is an external view of the coaxial connector, and FIG. 12 is a cross-sectional view of a caulking portion of the coaxial connector.

  As shown in FIG. 10, the front end of the coaxial connector includes a center contact 21, a center conductor 22a of the cable 22 to which the center contact 21 is fixed, and several inner jackets 22b of the cable 22 covering the center conductor 22a. And an insulator 23 that accommodates the center contact 21, the center conductor 22 a, and each inner sheath 22 b, and an outer conductor 24 that covers the insulator 23.

  As shown in FIG. 12, the center portion of the coaxial connector is arranged so that the inner conductors 22b, the numerous shield wires 22c of the cables 22, the outer jacket 22d of the cables 22, the ferrule 25, and the caulking shields are sequentially outward from the central conductor 22a. The wire 22c and the hexagonal outer conductor 24 processed by cutting are disposed. Each shield wire 22c and the outer conductor 24 are connected by a hexagonal caulking method.

  A conventional caulking method for the coaxial connector according to the second technique will be described with reference to FIG. In the description of the conventional second and subsequent techniques, the description of the same points as in the conventional first technique is omitted, and only the differences are described.

  FIGS. 13A and 13B show a state in which the shield wire 22c folded back with respect to the ferrule 25 is caulked by the external conductor 24 having a gap in the axial direction and the circumferential direction.

  In this caulking method, the caulking strength is insufficient, and as shown in FIG. 13C, there is a problem that the folded shield wire 22c protrudes from the external conductor 24.

  A conventional caulking method for the coaxial connector according to the third technique will be described with reference to FIG.

  FIGS. 14A and 14B show a state in which the shielded wire 22c folded back with respect to the ferrule 25 is squeezed by the outer conductor 24 being wound.

  In this caulking method, the caulking strength is insufficient, and as shown in FIG. 14C, there is a problem that the folded shield wire 22 c protrudes from between both ends of the external conductor 24. Further, the cross-sectional shape of the outer conductor 24 is deteriorated without becoming a cylindrical shape.

This type of conventional coaxial connector caulking method is described in the literature (for example, see Patent Document 1).
JP 2000-12184 A

  In the conventional caulking method of the coaxial connector according to the first technique, since the outer conductor is processed by cutting, it is complicated, the cost is high, and the ferrule has a press joint, so that the caulking strength is increased. Is lacking.

  In the conventional caulking method for the coaxial connector according to the second technology, the caulking strength is insufficient and a problem occurs that the folded shield wire protrudes from the external conductor.

  The conventional caulking method of the coaxial connector of the third technique not only causes the same defects as the second technique of the prior art, but also deteriorates the cross-sectional shape of the outer conductor without becoming a cylindrical shape.

  Therefore, the present invention improves the drawbacks of the conventional techniques described above, and does not cut the outer conductor, does not have insufficient caulking strength, and further reduces the cost of the coaxial connector caulking method. It is something to be offered.

  The present invention employs the following means in order to solve the above problems.

  1. A central contact; a central conductor of a cable to which the central contact is fixed; an inner sheath of the cable that covers the central conductor; an insulator that accommodates the central contact, the central conductor, and the inner sheath; In a coaxial connector composed of a plurality of shield wires, a jacket of the cable, a ferrule, and an outer conductor, the ferrule is provided with a notch, the respective shield wires are folded back, and a portion of the folded back The tip of each shield wire is positioned at the notch of the ferrule, and the outer conductor corresponding to the notch of the ferrule is caulked from the outside, so that a part of the outer conductor and the folded one A caulking method of a coaxial connector in which a tip end portion of each shield wire of a portion is engaged with a notch portion of the ferrule.

  2. 2. The coaxial connector caulking method according to claim 1, wherein the caulking method is hexagonal caulking.

  As is apparent from the description of the specification, the present invention has the following effects.

  1. Since the caulking work is performed without cutting the outer conductor, the manufacture is simple and the cost is low.

  2. Since the front end portion of each part of the outer conductor and the folded back part of each shield wire is engaged with the notch portion of the ferrule, the caulking strength is improved.

  3. There is no problem of short circuit inside the coaxial connector.

  A hexagonal caulking method for a coaxial connector according to an embodiment of the present invention will be described.

  The structure of Embodiment 1 of the present invention will be described with reference to FIGS. 1 is a cross-sectional view of a coaxial connector (however, a ferrule and a cable outside an outer conductor are external views), FIG. 2 is an external view of the coaxial connector, and FIG. 3A is a cross-sectional view taken along line AA in FIG. 3 (B) is a cross-sectional view taken along line BB in FIG. 2, FIG. 4 (A) is an external view of the outer conductor in the coaxial connector, and FIG. 4 (B) is a cross-sectional view taken along line CC in FIG. 4C is a cross-sectional view taken along line DD in FIG. 4B, respectively.

  As shown in FIG. 1, the front end of the coaxial connector includes a center contact 1, a center conductor 2a of a cable 2 to which the center contact 1 is fixed, and several inner sheaths 2b of the cable 2 covering the center conductor 2a. And an insulator 3 that accommodates the center contact 1, the center conductor 2 a, and each inner sheath 2 b, and an outer conductor 4 that covers the insulator 3.

  The center part of the coaxial connector will be described with reference to FIGS.

  As shown in FIG. 3A, which shows a crimped section cross-sectional shape along line AA in FIG. The outer sheath 2d of the cable 2, the ferrule 5, the crimped shielded wires 2c, and the hexagonal outer conductor 4 are provided.

  Further, in the central portion of the coaxial connector, the ferrule engaging portion 4a of the outer conductor 4 is notched portion 5a of the ferrule 5 as shown in FIG. Engage with. As shown in FIGS. 3A and 3B, the ferrule 5 and the outer conductor 4 are fixed by caulking work so that the press joint is located on the upper side (see FIG. 9). In other words, this is a caulking method in which the press joint is brought to the hexagonal sides of the upper and lower caulking dies in the pressing direction.

  The structure of the outer conductor 4 will be described with reference to FIG. A metal plate is first formed into a cylindrical shape by pressing. Next, a constricted portion 4b is provided near the tip of the cylindrical outer conductor 4, and a flange portion 4c is provided at the rear end. Furthermore, the front end of the outer conductor 4 is curved inward to provide a fitting port 4d for the mating connector, and the rear end of the outer conductor 4 becomes the insertion port 4e of the cable 2.

  The manufacturing process of the coaxial connector will be sequentially described with reference to FIGS.

1. Crimping of center contact and ferrule As shown in FIG. 5, the barrel-shaped crimping portion 1a of the center contact 1 and the center conductor 2a of the cable 2 are sandwiched between the core wire crimper 11a and the core wire anvil 11b. The crimp part 1a is wound around the center conductor 2a by the core wire crimper 11a and crimped. Thereafter, the carrier 1 b of the center contact 1 is cut by the carrier cutter 12.

  A barrel-shaped ferrule 5 and cable 2 are sandwiched between a ferrule crimper 13a and a ferrule anvil 13b. The ferrule 5 is wound around the cable 2 by the ferrule crimper 13a and crimped.

2. Folding of shield wire Each shield wire 2c is folded on the surface of the ferrule 5 as shown in FIG.

3. Insertion into Insulator The tip of the coaxial connector is inserted into the insulator 3 as shown in FIG.

4). Insertion into the outer conductor The tip and the center of the coaxial connector are inserted into the outer conductor 4 as shown in FIG.

5). Hexagonal caulking As shown in FIG. 9B, an upper caulking die 14a is disposed above the portion of the outer conductor 4 into which the central portion of the coaxial connector is inserted, and a lower caulking die 14b is disposed below.

  When the upper and lower caulking dies 14a and 14b are respectively driven in the directions of the arrows, as shown in FIG. 9A, the central portion of the coaxial connector and the portion of the outer conductor 4 into which the central portion is inserted are both upper and lower caulking dies 14a. , 14b. As a result, the coaxial connector is manufactured in the structure shown in FIGS. Since the ferrule engaging portion 4a of the outer conductor 4 is engaged with the notched portion 5a of the ferrule 5 as shown in FIG. 1 and the like, the caulking strength is improved.

  In the first embodiment, the caulking method is hexagonal caulking, but other appropriate caulking methods (for example, a triangular, square, or pentagonal caulking method) can be employed.

It is sectional drawing of the coaxial connector which concerns on Example 1 of this invention. However, the ferrule and the cable outside the outer conductor are external views. It is an external view of the coaxial connector. 2A is a cross-sectional view taken along line AA in FIG. 2, and FIG. 2B is a cross-sectional view taken along line BB in FIG. It is various drawings of the same outer conductor, (A) is an external view, (B) is a sectional view taken along line CC in (A), (C) is a sectional view taken along line DD in (B), respectively. Show. It is a front view of the 1st process of manufacture of the same coaxial connector. It is a front view of the 2nd process of manufacture of the same coaxial connector. It is a front view (however, one part is sectional drawing) of the 3rd process of manufacture of the same coaxial connector. It is a front view (however, one part is sectional drawing) of the 4th process of manufacture of the same coaxial connector. This is the state before and after caulking in the fifth step of manufacturing the same coaxial connector, (A) is a cross-sectional view after caulking (however, the same cable outside the ferrule and outer conductor is external view), and (B) is before caulking The cross-sectional views are respectively shown. It is sectional drawing of the coaxial connector which concerns on the conventional 1st technique. However, the ferrule and the cable outside the outer conductor are external views. It is an external view of the coaxial connector. It is sectional drawing of the hexagon caulking part of the outer conductor in the same coaxial connector. It is various drawings of the coaxial connector which concerns on the conventional 2nd technique, (A) is a front view of the principal part, (B) Sectional drawing of a crimping | crimped part, (C) is the folded shield wire protruded from the external conductor The front view of the principal part of a state is shown, respectively. It is various drawings of the coaxial connector which concerns on the conventional 3rd technique, (A) is a front view of the principal part, (B) Sectional drawing of a crimping | crimped part, (C) is the folded-up shield wire protruded from the external conductor The front view of the principal part of a state is shown, respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Center contact 1a Crimp part 1b Carrier 2 Cable 2a Center conductor 2b Inner coat 2c Shield wire 2d Outer coat 3 Insulator 4 Outer conductor 4a Ferrule engagement part 4b Constriction part 4c Flange part 4d Fitting port 4e Insertion port 5 Ferrule 5a Notch 11a Core wire crimper 11b Core wire anvil 12 Carrier cutter 13a Ferrule crimper 13b Ferrule anvil 14a Upper caulking die 14b Lower caulking die

Claims (2)

A central contact; a central conductor of a cable to which the central contact is fixed; an inner sheath of the cable that covers the central conductor; an insulator that houses the central contact, the central conductor, and the inner sheath; and In the coaxial connector composed of a plurality of shielded wires, the jacket of the cable, a ferrule, and an outer conductor,
Provide a notch in the ferrule,
Fold each shield wire, position the tip of each folded shield wire at the notch of the ferrule,
The outer conductor corresponding to the notched portion of the ferrule is caulked from the outside, so that a part of the outer conductor and a part of the folded back of each shield wire are connected to the notched portion of the ferrule. A caulking method for a coaxial connector, characterized by being engaged. 2. The coaxial connector caulking method according to claim 1, wherein the caulking method is hexagonal caulking.

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