JP2008123914A - Shielded cable with terminal treated, and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shielded cable in which a braided wire is not loosened and separated and the braided wire does not possibly contact a core wire, and the terminal part is treated, and its manufacturing method. <P>SOLUTION: This is the shielded cable 1 composed of a coaxial structure in which an inner wire 4 in which the outside surrounding of a core wire 2 is covered with an insulator 3 is covered with a braided wire on its outside surrounding, and the outside surrounding of the braided wire 5 is covered with an insulating sheath 6. Using this shielded cable 1, the terminal part of the shielded cable 1 is peeled off and the sheath 6 and the braided wire 5 are removed to expose the insulator 3 of the inner wire 4. After a hard sleeve 7 consisting of a metallic tubular body having conductivity is inserted between the braided wire 5 and the insulator 3, a wire barrel 8 is crimped and caulked to the outside surrounding of the sleeve 7 and a shielded cable 1 with the terminal part treated is obtained. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a shielded wire in which a terminal is processed and a method for manufacturing the shielded wire.

  Conventionally, as a method of processing the end of a shielded wire whose outer periphery is coated with a braided wire and whose outer periphery is coated with an insulation coating with an insulator, the braided wire at the end of the shielded wire is exposed, A terminal processing method is known in which a sleeve made of a hard cylindrical body is inserted inside a braided wire, and a conductive cylindrical body is attached and fixed by caulking on the outer periphery (see, for example, Patent Document 1).

  3A to 3D show a conventional terminal processing method for shielded wires. In the conventional shielded wire terminal treatment method, as shown in FIG. 3A, first, the end of the shield wire 101 is peeled, the outer skin 106 is removed, and the braided wire 105 is exposed. The insulator 103 of the terminal extension is partially peeled to expose the core wire 104. Next, as shown in FIG. 5B, the tip of the braided wire 105 is widened and a sleeve 107 is inserted between the braided wire 105 and the insulator 103. Next, as shown in FIG. 3C, the spread braided wire 105 is returned to the original position, and the braided wire 105 is inserted into the opening of the U-shaped metal piece 108. Finally, as shown in FIG. 4D, the metal piece 108 is caulked in an annular shape.

  According to the conventional terminal processing method, since the sleeve 107 exists under the braided wire 105 even when pressure is applied when caulking the metal piece 108, the insulator 103 is protected by the sleeve 107 and insulated. The body 103 can be prevented from being crushed.

JP-A-8-45575 (Claim 3)

  However, in the above-described conventional terminal processing method, the braided wire 105 of the shielded wire 101 is expanded and the sleeve 107 is inserted, and then the expanded braided wire 105 needs to be returned to its original state. There was a problem that 105 was easily scattered. If the braided wire 105 is scattered, the braided wire 105 and the core wire 102 exposed to the terminal are easily brought into contact with each other, and there is a problem that the braided wire 105 and the core wire 102 are likely to be short-circuited. It was.

  The problem to be solved by the present invention is to provide a shielded wire in which a terminal is processed and a method of manufacturing the same, in which the braided wire is separated and the separated braided wire is not in contact with the core wire. .

  In order to solve the above problems, the shielded wire treated with the terminal of the present invention includes an inner wire in which the outer periphery of the conductive core wire is covered with an insulator, and a conductive braid that covers the outer periphery of the inner wire. A terminal of a shielded wire having a coaxial structure comprising a wire and an insulating outer covering covering the outer periphery of the braided wire, and the outer skin of the end and the braided wire are peeled to a predetermined length. A portion of the outer periphery of the inner line is exposed to the outside, and a hard sleeve made of a metallic cylindrical body having conductivity is inserted between the braided wire and the inner wire insulator. The gist is that the wire barrel is caulked around the outside.

  It is preferable that a sleeve is inserted into the shield wire so that an outer periphery of a predetermined length of the sleeve is exposed to the outside. Moreover, it is preferable that a wire barrel consists of the sleeve side barrel part crimped on the outer side of a sleeve, and the outer skin side barrel part crimped on the outer side of an outer skin.

  In addition, the method of manufacturing a shielded wire in which the terminal of the present invention is processed includes an inner wire in which the outer periphery of the conductive core wire is covered with an insulator, and a conductive braided wire that covers the outer periphery of the inner wire, Using a shielded wire having a coaxial structure composed of an insulating outer sheath covering the outer periphery of the braided wire, removing the outer sheath and the braided wire at the end of the shielded wire to expose the insulator of the inner wire, the shield The gist is to insert a hard sleeve made of a metallic cylindrical body having conductivity from the end of the wire between the braided wire and the insulator, and then crimp the wire barrel around the outer periphery of the sleeve. And

  In the above manufacturing method, it is preferable that the sleeve is inserted between the braided wire and the inner wire so that the outer periphery of the sleeve having a predetermined length is exposed to the outside. Also, the wire barrel is composed of two barrel parts, a sleeve side barrel part and a skin side barrel part, and the sleeve side barrel part is caulked around the outside of the sleeve, and the skin side barrel part is caulked around the outside of the skin. preferable.

  According to the shielded wire in which the terminal according to the present invention is processed, a hard sleeve made of a metal cylindrical body having conductivity is inserted between the braided wire and the insulator of the inner wire, that is, the outer skin. Since the sleeve is inserted inside the braided wire without peeling off the braided wire, the braided wire may come apart and come into contact with the core wire when crimping the wire barrel on the outside of the sleeve Therefore, a shield wire with high electrical reliability can be obtained.

  Furthermore, according to the method for manufacturing a shielded wire in which the terminal of the present invention has been processed, the sheath and the braided wire of the terminal of the shielded wire are removed to expose the insulator of the inner wire, and the conductive material has conductivity from the terminal side of the shielded wire. By adopting a method in which a hard sleeve made of a metal cylindrical body is inserted between the braided wire and the insulator and then crimped by crimping a wire barrel around the outside of the sleeve, Compared to the terminal processing method, when inserting the sleeve, it is only necessary to insert the sleeve between the braided wire and the insulator, and there is no need to expand the braided wire or return the expanded braided wire to its original state. It is excellent in workability. And since there is no possibility that the braided wire may be broken during the operation, a shield wire with a high electrical reliability and processed terminal is obtained with certainty.

  Embodiments of the present invention will be described below in detail with reference to the drawings. FIGS. 1A to 1C are explanatory views showing the appearance of the vicinity of the shielded wire terminal in each step in the manufacturing process of the shielded wire processed with the terminal of the present invention. 2 (a) to 2 (c) are cross-sectional views of the shield wires of FIGS. 1 (a) to 1 (c). As shown in FIG. 1 (c) and FIG. 2 (c), the shield wire on which the terminal in the present invention has been processed is formed by twisting and bundling a plurality of metal strands so that the outer periphery of the conductive core wire 2 has an outer periphery. The inner wire 4 covered with the insulator 3, the braided wire 5 having the conductivity obtained by braiding a plurality of strands covering the outer periphery of the inner wire 4, and the insulating wire covering the outer periphery of the braided wire 5 The terminal of the shielded wire 1 having a coaxial structure composed of the outer skin 6 is processed. The shielded wire 1 is excellent in high-frequency characteristics because the braided wire 3 as a shield conductor covers the outer periphery of the core wire 2 as a signal conductor at a constant interval without any gaps, and the high-frequency electric signal Suitable for transmission.

  As shown in the figure, the shield wire 1 is an insulator of the braided wire 5 and the inner wire 4 in a state in which the outer skin 6 and the braided wire 5 are peeled to a predetermined length and the inner wire 4 is exposed. 3 is inserted in the sleeve 7. About half of the total length of the sleeve 7 is exposed to the outside, and the other half is inserted inside the braided wire 5. A wire barrel 8 is caulked around the outside of the sleeve 7.

  The sleeve 7 is made of a metal having conductivity and is formed as a hard cylindrical body. The sleeve 7 only needs to be strong enough to be inserted between the braided wire 5 and the insulator 3 of the inner wire 4. The sleeve 7 is formed such that its inner diameter allows the inner line 4 to be inserted into the cylindrical body, and its outer diameter allows it to be inserted inside the braided wire 5.

  The wire barrel 8 has a sleeve side barrel portion 8a that is caulked to directly contact the outer periphery of the sleeve 7 exposed to the outside, and a braid around the outer periphery of the sleeve 7 that is inserted inside the braided wire 5. It is comprised from the outer side barrel part 8b caulked via the line 5 and the outer skin 6. Further, the terminal of the shielded wire has the terminal 4 with the insulator 3 peeled off, and the core wire 3 is exposed for a predetermined length. Further, the sleeve 7 is inserted so that the insulator 3 of the extension 4 is slightly exposed.

  As shown in FIGS. 1 (a) and 2 (a), first, the method of manufacturing a shielded wire with the terminal processed peels and removes the outer skin 2 and the braided wire 3 at the terminal of the shielded wire 1 to obtain the extension 4 The insulator 3 is exposed. At this time, the insulator 3 on the terminal side of the extension 4 is partially removed, and the tip of the core wire 2 is exposed.

  Next, the sleeve 7 is inserted between the braided wire 5 and the insulator 3 from the terminal side of the shield wire 1. At this time, the sleeve 7 is inserted while the outer periphery of the braided wire 5 is covered with the outer skin 6 and is not exposed to the outside, and the work of expanding the end of the braided wire 5 is not performed. As shown in FIGS. 1 (b) and 2 (b), about half of the total length of the sleeve 7 is inserted between the insulator 3 of the extension 4 and the braided wire 5, and the remaining portion is inserted. The outer surface is exposed to the outside. Even after the sleeve 7 is inserted, the outer surface of the braided wire 5 is covered with the outer skin 6.

  Next, as shown in the figure, a wire barrel 8 having a U-shaped cross section is fitted into the shield wire 1 into which the sleeve 7 is inserted, and is crimped so as to form an annular shape. As shown in the figure, the wire barrel 8 has a shape in which two barrel portions, a sleeve side barrel portion 8a and a skin side barrel portion 8b, are connected. As shown in FIGS. 1 (c) and 2 (c), the wire barrel 8 has a sleeve side barrel portion 8 a directly caulked around the outside of the exposed sleeve 7, and a skin side barrel portion 8 b around the outside of the outer skin 6. Is caulked.

  When either the sleeve side barrel portion 8a or the outer side barrel portion 8b is caulked, the wire barrel 8 is caulked in a state where the sleeve 7 exists outside the inner line 4, so that the insulator 3 of the inner line 4 is protected by the sleeve 7. Then, there is no possibility that the insulator 3 of the inner wire 4 is crushed by the pressure caused by the crimping when the wire barrel 8 is crimped. Further, when the sleeve 7 is inserted into the shielded wire 1, it is not necessary to widen the braided wire 5 once and insert it again after the insertion as in the prior art, and the braided wire 5 is covered with an outer skin before and after the sleeve 7 is inserted. Therefore, there is no possibility that the braided wire 5 is scattered.

  As shown in FIG. 2 (c), the braided wire 5 and the sleeve 7 are in contact with each other, and the sleeve 7 and the sleeve side barrel 8a are in contact with each other. On the other hand, since the outer barrel 8b is caulked from the outside of the braided wire 5 and outer sheath 6, the wire barrel 8 is securely crimped to the end of the shielded wire 1. Since the wire barrel 8 is firmly fixed to the shield wire 1 in contact with the braided wire 5 by the sleeve side barrel 8a, the wire barrel 8 and the braided wire 5 can be electrically connected stably.

  The shielded wire 1 processed with this terminal is used by being connected to a coaxial connector, for example. In that case, the part of the wire barrel 8 of the shield wire 1 is connected so as to be in contact with the outer conductor terminal of the coaxial connector. Further, instead of the wire barrel 8, an insulation barrel in which the outer conductor terminal is formed integrally with the barrel portion may be used. When the shield wire 1 is connected to the coaxial connector, the core wire 2 is connected to the inner conductor terminal of the coaxial connector of the extension wire 4 at the end of the shield wire 1. A dielectric is interposed between the inner conductor terminal and the outer conductor terminal (insulation barrel) of the coaxial connector.

  The shielded wire treated with the terminal of the present invention has excellent high frequency characteristics and high reliability, and can be optimally used as a coaxial cable for transmitting an electric signal between electric components mounted on an automobile.

(A)-(c) is explanatory drawing which shows the external appearance of the shield wire terminal vicinity of each process in the manufacturing process of the shield wire by which the terminal of this invention was processed. (A)-(c) is sectional drawing of the shield wire of FIG.1 (a)-(c), respectively. (A)-(d) is explanatory drawing which shows the terminal processing method of the conventional shield wire.

Explanation of symbols

1 Shielded wire 2 Core wire 3 Insulator 4 Internal wire 5 Braided wire 6 Outer skin 7 Sleeve 8 Wire barrel

Claims (6)

  An inner wire in which the outer periphery of the conductive core wire is covered with an insulator, a conductive braided wire that covers the outer periphery of the inner wire, and an insulating outer skin that covers the outer periphery of the braided wire The end of the shielded wire having the coaxial structure is processed, and the outer skin and the braided wire of the terminal are peeled for a predetermined length, and a part of the outer periphery of the inner line is exposed to the outside. A terminal is processed, characterized in that a hard sleeve made of a metal cylindrical body having conductivity is inserted between the inner and inner insulators, and a wire barrel is caulked around the outside of the sleeve. Shielded wire.   2. The shielded wire having a terminal processed according to claim 1, wherein the sleeve is inserted so that an outer periphery of a predetermined length of the sleeve is exposed to the outside.   3. The shielded wire having a terminal processed according to claim 1, wherein the wire barrel includes a sleeve side barrel portion caulked on the outer side of the sleeve and an outer side barrel portion caulked on the outer side of the outer skin.   An inner wire in which the outer periphery of the conductive core wire is covered with an insulator, a conductive braided wire that covers the outer periphery of the inner wire, and an insulating outer skin that covers the outer periphery of the braided wire Using the shielded wire having the coaxial structure, the outer sheath and the braided wire of the shielded wire are removed to expose the insulator of the inner wire, and from the metal cylindrical body having conductivity from the end of the shielded wire A method of manufacturing a shielded wire with a terminal treated, comprising: inserting a hard sleeve formed between a braided wire and an insulator and then crimping a wire barrel around the outer periphery of the sleeve.   5. The method of manufacturing a shielded wire processed with a terminal according to claim 4, wherein the sleeve is inserted between the braided wire and the inner wire so that the outer periphery of the sleeve having a predetermined length is exposed to the outside.   The wire barrel consists of two barrel parts, a sleeve side barrel part and a skin side barrel part. The sleeve side barrel part is caulked around the outside of the sleeve, and the skin side barrel part is caulked around the outside of the skin. The manufacturing method of the shield wire by which the terminal of Claim 4 or 5 processed.

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