JP2007227047A - Multicore cable and its process of manufacture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multicore cable with a connecter which allows forming by bending a connecter and an electric wire at 90° through reduction of disconnection that occurs with the electric wire near the inside end of bending, at the connection between the connecter and the electric wire. <P>SOLUTION: Both ends of a plurality of electric wires of a multicore cable 1 are arrayed with a specified pitch to be flat, with a connector 2 connected to the both ends. The plurality of electric wires are bandled in a single piece by an intermediate part with a binding band 4, and is bent at least at one ends. As a result of the bending, the electric wires arrayed at the end of smaller curvature radius (or an electric wire group 3a away from the electric wires by a specified number of them) are formed in such length as bent at right angle against the lengthwise direction of the connecter 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a multi-core cable composed of a plurality of insulated wires and coaxial wires, and a method for manufacturing the same, and more specifically, is bundled at an intermediate portion, and a plurality of wires are flattened at both ends to provide an electrical connector. The present invention relates to a connected multi-core cable and a manufacturing method thereof.

  In recent years, with the spread of notebook computers, mobile phones, small video cameras, and the like, in addition to the reduction in size and weight of these information communication devices, high speed and high image quality are required. In order to cope with this, extremely thin insulated wires and coaxial wires (sometimes called shielded wires) are used for connection between the device body and the liquid crystal display, wiring in the device, etc. A harness-shaped wiring member in which a plurality of electric wires are assembled and integrated is used. The electrical connection is made with an electrical connector (hereinafter simply referred to as a connector) that is connected in advance to the end of the cable in a predetermined arrangement, and for this connector, for example, a large number of contacts used for connecting a printed circuit or the like. Edge-shaped connectors are used in which are arranged in a row.

  A multi-core cable with a connector is generally used in a form called a flat cable or a flat cable in which a plurality of electric wires are arranged in a parallel parallel line at a predetermined pitch to connect electrical connectors to both ends. There are many. However, although this cable with a connector is suitable for wiring along the wall surface in the device, for example, it can rotate like a connection between the main body of a mobile phone, a notebook computer, a video camera, etc. and a liquid crystal display. When wiring through the part, the twisting characteristic in the rotating part is poor and the shape of the hinge part becomes large. In addition, there is a problem that the stress applied to the flat cable is large and the wire is easily disconnected.

  For this reason, in wiring via a rotating part such as an open / close hinge, a plurality of electric wires are flattened at both ends to which the electric connector is connected, but the electric wires are bundled into one at the intermediate part. A multi-core cable with a connector is used. As a form of bundling a plurality of wires, only both ends are flattened in the manufacturing stage of the multi-core cable, and the intermediate part is left in a state of being separated for later bundling, or the flattened state is a cylinder. It is bundled so as to be rolled into a shape. When bundling multiple wires, a tape-like bundling member is used, or when a coaxial wire or shielded wire is used as the wire, a ground connection member for grounding may be provided in the middle part of the multi-core cable. .

  When bundling the middle part of the electric wires, if the lengths of the electric wires are the same, a line that causes slack and a line that receives tension are generated depending on the arrangement position. Therefore, measures are taken to make the lines arranged on both sides longer than the line on the center side, or to form the connectors on both sides in an L shape along the arrangement direction of the coaxial cables. .

As an example of the former measure, a technique is also disclosed in which each electric wire of a multi-core cable is specified to have an unequal length so that the core wires are not pulled at the connector portion even when bundled (see, for example, Patent Document 1). . The multi-core cable described in Patent Document 1 is a multi-core cable in which both end portions of a plurality of electric wires are arranged in a flat shape with a predetermined pitch, and an intermediate portion is bundled into one. The cable width in the electric wire arrangement direction is D, the distance between the two terminal portions is E, and the plurality of electric wires arranged between the two terminal portions are sequentially lengthed from the minimum length Ls to the maximum length Lm. , D / E> 1/6, and (Lm−Ls)> {(D ² + E ² ) ^1/2 −E}.

  On the other hand, in the case of a device such as a mobile phone, the position of the connector is generally determined by giving priority to the method of making the base. Therefore, a multi-core cable with a connector for connecting the base and other parts (including the base) must be formed so that it can be connected according to the arrangement of the connectors on the base and the parts. Here, due to the handling of the multi-core cable in the device, it is also necessary to form each wire by bending it by 90 degrees (in an L shape) at the connector portion.

Therefore, conventionally, as shown in FIG. 4, the length direction of the central portion of the multi-core cable (ie, the longitudinal direction of the binding band 4) and the length direction of the connection portion of the connector 2 of the multi-core cable ( In other words, the connector 2 is formed so as to be approximately 90 degrees.
JP 2005-235690 A

  However, when forming a multi-core cable with a connector by bending the connector portion by 90 degrees according to the prior art, each electric wire (for the sake of explanation, divided into the electric wire groups 3a to 3c) is attached to the connector 2 at the connecting portion. Even if the bending is attempted, as shown in FIG. 4, only the forming in which the electric wire group 3 a inside the bending is directed obliquely toward the binding band 4 can be performed.

  In such a conventional multi-core cable with a connector, even if the length of each electric wire is adjusted by conventional techniques including Patent Document 1, the electric wire group 3a at the inner end of the row is easily disconnected.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to manufacture a multi-core cable with a connector capable of forming by bending a connector and an electric wire at 90 degrees, and the multi-core. The object of the present invention is to provide a cable and reduce disconnection caused by an electric wire in the vicinity of the inner end of the bend at the connection portion between the connector and the electric wire.

  A multi-core cable according to the present invention is a multi-core cable in which both end portions of a plurality of electric wires are arranged in a flat shape at a predetermined pitch, and an electric connector is connected to the both end portions. Is a length in which the electric wires arranged at the end with the smaller radius of curvature are bent at right angles to the longitudinal direction of the electrical connector as a result of being bundled at one end and bent at at least one end portion. It is characterized by being molded with.

  In addition, the method for manufacturing a multi-core cable according to the present invention is a method for manufacturing a multi-core cable in which both terminal portions of a plurality of electric wires are arranged in a flat shape at a predetermined pitch, and electrical connectors are connected to the both terminal portions. The plurality of electric wires are bent at at least one end portion, and as a result of the bending, the electric wires arranged at the end having the smaller radius of curvature are pressed against a wall perpendicular to the length direction of the electrical connector. It is characterized by including a forming step for forming the wire to be bent at a right angle and a bundling step for bundling the intermediate portions of the plurality of electric wires.

  According to the present invention, in a multi-core cable with a connector, it is possible to reduce the disconnection that occurs in the electric wire near the bent inner end in the connection portion between the connector and the electric wire, and to form the connector and the electric wire by bending them at 90 degrees. Become.

  FIG. 1 is a diagram for explaining an example of a multi-core cable with a connector according to the present invention, and FIG. 2 is a diagram showing an overall image of the multi-core cable with a connector in FIG.

  The multi-core cable 1 with a connector according to the present invention is a cable in which both terminal portions of a plurality of electric wires are arranged in a flat shape at a predetermined pitch, and an electric connector (connector) 2 is connected to the both terminal portions. Here, as the electric wire, a coaxial electric wire, an extra fine insulated electric wire, or the like can be applied. It is assumed that the multi-core cable 1 is further bundled at a middle portion with a binding band 4 such as a tape.

  The plurality of electric wires used in the multi-core cable 1 are bent at substantially right angles to the arrangement direction as shown in FIG. Here, as a result of bending the plurality of electric wires at the terminal portion, the intermediate portion (near the binding band 4) is bundled substantially parallel to the longitudinal direction of the connector 2 connected to the terminal portion. That is, the multi-core cable 1 is bent in an L shape at at least one terminal portion.

  In the present invention, as a result of the bending, the electric wires arranged at the end of the side with the smaller curvature radius (bending inner side) are formed perpendicular to the longitudinal direction of the connector 2. Hereinafter, as shown in the figure, an example in which an electric wire group (hereinafter referred to as an inner electric wire group) 3 a from the electric wire to a predetermined number of wires is formed perpendicular to the longitudinal direction of the connector 2 will be described. The inner wire group 3a may be about three.

  As described above, according to the present invention, when the connector 2 and the electric wire are bent by 90 degrees and formed, and also after the forming, the electric wire (inner electric wire group 3a) near the bent inner end at the connection portion between the connector 2 and the electric wire. ) Is formed at right angles to the connector longitudinal direction, it is possible to reduce the disconnection that occurs at the connector root of the inner wire group 3a.

  The inner wire group 3a has a length that is bent at a right angle with respect to the other wires (wire groups 3b and 3c described later) in order to enable a right-angle molding at the bent inner portion described above, that is, It secures the length required to make room for vertical molding.

  In the multi-core cable 1 illustrated in FIG. 2A, the terminal portion on the connector 2 side is bent in an L shape, and the terminal portion on the connector 5 side is connected while being straight. Since the connection portion with the connector 5 is not bent, it is not particularly distinguished from the inside, the center, and the outside with respect to the bending.

  In the multi-core cable 1 illustrated in FIG. 2B, both terminal portions on the connector 2 side and the connector 5 side are bent in an L shape in opposite directions. The inner electric wire group 3a, the central electric wire group 3b, and the outer electric wire group 3c with respect to the connector 2 are bent in the reverse direction at the connection portion with the connector 5, so that the outer electric wire group 3a and the central electric wire group 3b are respectively near the connector 5. And the inner wire group 3c.

  In the multi-core cable 1 illustrated in FIG. 2C, both terminal portions on the connector 2 side and the connector 5 side are bent in an L shape in the same direction. The inner electric wire group 3a, the central electric wire group 3b, and the outer electric wire group 3c with respect to the connector 2 are bent in the same direction even at the connection portion with the connector 5, so that the inner electric wire group 3a and the central electric wire group 3b are also near the connector 5. And the outer wire group 3c.

  Here, the length of the portion formed vertically with respect to the inner wire group 3a and the outer wire group 3c described above is any multi-core cable 1 shown in FIGS. 2 (A) to (C). In addition, it indicates a length that is further added to an extra length (for example, a length defined in the invention of Patent Document 1) that is allowed to be bent by the connector 2 or the connector 5 as shown in FIG.

  FIG. 3 is a diagram showing a state of forming when manufacturing the multi-core cable with connectors of FIG. When the multi-core cable described in FIG. 1 is manufactured, the inner wire group 3a is bent in the longitudinal direction of the connector as a result of being bent at a right angle with respect to the arrangement direction at the terminal portion to be bent of all the wires. A forming step of forming the wires so as to be perpendicular to each other, and a bundling step of bundling intermediate portions of the plurality of electric wires into one with a bundling band 4. In this molding step, it is sufficient that at least one of the inner wire groups 3 a is perpendicular to the longitudinal direction of the connector 2.

  In the molding step, each electric wire can be formed into the shape shown in FIG. 1 by using the jig 10 illustrated in FIG. The jig 10 extends in parallel with the connector 2 in the longitudinal direction of the connector 2, the connector housing groove 11 a for housing the connector 2, and the groove connected to the connector housing groove 11 a and connected from the connecting portion to the connector 2. And an electric wire storing groove for storing.

  The electric wire storage groove includes a connection portion storage groove 11b connected to the connector storage groove 11a and an extension groove 11c connected to the connection portion storage groove 11b. The connecting portion storage groove 11b not only stores all the electric wires near the connecting portion, but also has a bypass side wall 12. The bypass side wall 12 extends along the electric wire when the electric wire (the electric wire at the end of the electric wire group 3a) positioned at the end of the connecting portion in the extending direction is extended perpendicularly to the longitudinal direction of the connector 2. The connecting portion storage groove 11b and the extension groove 11c are connected at a right angle. As a result, the wire group 3a can be formed perpendicular to the connector longitudinal direction. In addition, what is necessary is just to change the height (distance to the side wall 13 for extension) of the detour side wall 12 according to the number so that the number of the inner side wire groups 3a may be formed at least vertically.

  The connecting portion accommodating groove 11b also has a detouring convex portion that bypasses the outer wire group 3c separately from the other wire groups 3a and 3b in order to allow the outer wire group 3c to form perpendicularly to the connector longitudinal direction. 15 may be provided on the bottom surface. The outer electric wire (only the outermost side) or the outer electric wire group 3c can be bent substantially at a right angle so as to wind outside the detouring convex portion 15. Here, the position of the detouring convex portion 15 may be changed so that only the number regarded as the outer electric wire group 3c is divided and formed.

  The extension groove 11c includes an extension side wall 13 that is a wall perpendicular to the bypass side wall 12 and that extends in the extension direction, and an extension side wall 14 at a position facing the extension side wall 13. In addition to the bypass side wall 12, the connection portion storage groove 11 b may be provided with a step in the connector storage groove 11 a in consideration of the step generated at the connection portion between the connector 2 and the wire groups 3 a to 3 c.

  In the molding process using such a jig 10, first, the connector 2 is stored in the connector storage groove 11 a. Thereafter, all the electric wires are accommodated in the connecting portion accommodation groove 11b, and the measures against disconnection of the inner electric wire group 3a are applied to the end cable by applying the bypass side wall 12 perpendicular to the cable arrangement direction (the length direction of the connector 2) to the end cable. The cable at the end is bundled with other electric wires while being bent at approximately 90 degrees so as to get over the bypass side wall 12. Only the outer wire group 3c is bent by 90 degrees in the arrangement direction so as to get over the bypass convex portion 15, and all the wires (particularly the inner wire group 3a) are bent in the arrangement direction so as to get over the bypass side wall 12. All the electric wires are accommodated along the extending groove 11c.

  The multi-core cable 1 manufactured by taking measures against this disconnection has a connector 2 attached almost in parallel to the length direction of the cable, and has the shortest length in the vicinity of the connector 2 (the inner cable). The electric wire that hits the wall) is attached to the connector 2 at approximately 90 degrees. In contrast, in the conventional multi-core cable with a connector shown in FIG. 4, the angle at which the inner electric wire is attached to the connector 2 is not 90 degrees.

  Further, as a countermeasure against disconnection of the outer electric wire group 3c, a detour convex portion 15 such as a pin is arranged on a line extending perpendicularly to the connector 2 from a position where the outer electric wire group 3c is attached to the connector 2, and the outer electric wire group 3c is arranged. The forming of bending the group 3c through the outside of the pin and bundling it with other electric wires is applicable. The multi-core cable 1 manufactured by taking measures against this disconnection has a connector 2 attached almost in parallel to the length direction of the cable, and has the longest length near the connector 2 (the outer wire). The electric wire bundled by winding the pins) is attached to the connector 2 at approximately 90 degrees. In contrast, in the conventional multi-core cable with a connector shown in FIG. 4, the angle at which the outer electric wire is attached to the connector 2 is not 90 degrees.

  As described above, the shape in the longitudinal direction of all the wires can be formed into the shape illustrated in FIG. 1 by such a forming step. Further, in the bundling step, all the wires extending from the jig 10 are bundled into one by the bundling band 4. This binding process can be easily performed even before or during the molding process by loosening the binding band 4 so that all the wires move in the length direction with respect to the binding band 4.

  In practice, the multi-core cable 1 shown in FIGS. 2A to 2C is manufactured. For this purpose, it is preferable to first adjust the length of each electric wire. In this length adjustment, for example, the length may be calculated based on the route, and each electric wire may be cut to the calculated length and connected to the connectors 2 and 5. Of course, after connecting each electric wire to the connector 2, each electric wire may be cut to the calculated length. Moreover, what is necessary is just to connect using the alignment tool of an electric wire so that the connection of an electric wire may not be mistaken by the connector 2 and the connector 5. FIG.

It is a figure for demonstrating an example of the multicore cable with a connector which concerns on this invention. It is a figure which shows the whole image of the multi-core cable with a connector of FIG. It is a figure which shows the mode of forming at the time of manufacturing the multi-core cable with a connector of FIG. It is a figure which shows the multicore cable with a connector by a prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Multi-core cable with a connector, 2, 5 ... Connector, 3a ... Inner electric wire group, 3b ... Central electric wire group, 3c ... Outer electric wire group, 4 ... Binding band, 10 ... Jig, 11a ... Connector accommodation groove, 11b ... Connection portion storage groove, 11c ... extension groove, 12 ... detour side wall, 13, 14 ... extension side wall, 15 ... detour projection.

Claims (3)

  A multi-core cable in which both end portions of a plurality of electric wires are arranged in a flat shape at a predetermined pitch, and an electric connector is connected to the both end portions, wherein the plurality of electric wires have one intermediate portion. As a result of being bundled and bent at at least one end portion, the electric wires arranged at the end having the smaller radius of curvature are formed with a length that is bent at right angles to the longitudinal direction of the electrical connector. Features multi-core cable.   2. The plurality of electric wires are bent at the end portion, and as a result, the intermediate portion is bundled in parallel with the longitudinal direction of the electrical connector connected to the end portion. The listed multi-core cable.   A method of manufacturing a multi-core cable in which both end portions of a plurality of electric wires are arranged in a flat shape at a predetermined pitch and an electric connector is connected to the both end portions, wherein the plurality of electric wires are connected to at least one end A molding step in which the wires arranged at the ends having a smaller radius of curvature are bent against the wall perpendicular to the length direction of the electrical connector and bent at a right angle as a result of bending at a portion; and And a bundling step of bundling intermediate portions of the plurality of electric wires into one.

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