JP5203121B2 - Connection method and connection structure between flat cable and connection terminal - Google Patents

Description

  In the present invention, a flat cable (flexible flat cable, FFC: Flexible Flat Cable) in which a plurality of flat conductors are arranged in parallel with a gap in an insulating coating, and in parallel with a connection molding. The present invention relates to a technique for connecting a plurality of held connection terminals, and more particularly, to a connection method and a connection structure between a flat cable and a connection terminal that can suppress a shift in connection position.

  The connection between the flat conductor of the flat cable and the connection terminal of the connection molded body is performed by performing resistance welding, ultrasonic welding, or the like on the overlapping portions.

  The welding is performed in such a manner that the longitudinal direction of the flat conductor and the longitudinal direction of the connecting terminal are overlapped with each other in the same direction as in Patent Document 1 below, or in the direction orthogonal to each other as in Patent Document 2 below. Some of them are done in such a way that they overlap.

When welding the flat rectangular conductor and the connection terminal, as shown in FIG. 4, the positioning is performed by the positioning rod 101 provided in the welding apparatus. Specifically, the margin width M, the pitch P, the conductor width C, the total pitch PA, the total width W, etc. of the flat cable 102 are determined in advance with reference to the margin cut surface 103 that is an end in the width direction of the flat cable 102. The connection position for welding is controlled based on the measured dimensions. In FIG. 4, 104 is a flat conductor, 105 is an insulation coating, 106 is a connection molding, and 107 is a connection terminal.
JP-A-9-129283 JP 2006-136116 A

  However, due to variations in manufacturing of flat cables, a small amount of flat conductors may meander and be fixed to the insulation coating, as shown in phantom lines in FIG.

  For this reason, when the connection position is determined based on the margin cut surface of the flat cable as described above, the position is determined from the intersection of the flat conductor 104 and the connection terminal 107, for example, the welding position 108 shown in FIG. In some cases, a stable connection state cannot be obtained.

  Therefore, a main object of the present invention is to improve the accuracy of the connection position.

Means therefor are located at one end portion in the longitudinal direction of the flat conductor of the flat cable having a plurality of flat conductors arranged in parallel in the width direction and an insulating coating covering the flat conductors. A flat cable for connecting a plurality of connection terminals solidified with a synthetic resin having a long strip shape in a direction perpendicular to the connection terminal, and a connection method of the connection terminals, the outer side in the width direction of the rectangular conductors arranged in parallel in the width direction After exposing the widthwise outer edge of the flat rectangular conductor in the same direction as the widthwise outer side, the widthwise outer edge of the flat rectangular conductor is positioned with a positioning jig provided in a welding device and the synthetic resin forming the long band shape and the above The rectangular conductor is positioned so as to be sandwiched between the rectangular conductors, and the rectangular conductor and the connection terminal are connected with reference to the position of the outer edge in the width direction of the rectangular conductor determined by the positioning jig.

Further, the flat conductor of the flat cable having a plurality of flat conductors arranged in parallel in the width direction and an insulating coating covering these flat conductors is located at one end portion in the longitudinal direction and orthogonal to the longitudinal direction. A flat cable for connecting a plurality of connection terminals solidified with a synthetic resin having a long belt shape and a connection terminal, wherein the flat conductors on the outer side in the width direction among the flat conductors arranged in parallel in the width direction A synthetic resin and a rectangular conductor having an open portion that exposes an outer edge in the width direction in the same direction as the outer side in the width direction, and being exposed by the open portion, and a positioning jig provided in a welding apparatus in the form of the long strip A connecting portion for connecting the flat conductor and the connection terminal is formed at a position determined with reference to the outer edge in the width direction of the flat conductor positioned so as to be sandwiched therebetween .

  According to the present invention, variations in connection positions can be suppressed and a stable connection state can be obtained.

An embodiment for carrying out the present invention will be described below with reference to the drawings.
The connection structure of the flat cable 11 and the connection terminal 22 according to the present invention is the flat conductor of the flat cable 11 provided with a plurality of flat conductors 12 arranged in parallel in the width direction and an insulating coating 13 covering the flat conductors 12. 12 is a connection structure of the flat cable 11 for connecting the connection terminal 22 to the connection terminal 22 and the same as the outer side in the width direction of the rectangular conductor 12a on the outer side in the width direction among the flat conductors 12 arranged in parallel in the width direction. After the widthwise outer edge 12b in the direction is exposed, the widthwise outer edge 12b of the rectangular conductor 12a is positioned by the positioning rod 31, and the position of the widthwise outer edge 12b of the rectangular conductor 12a determined by the positioning rod 31 is determined. The rectangular conductor 12 and the connection terminal 22 are connected on the basis of the above.

  FIG. 1 is a plan view showing a state when the flat conductor 12 of the flat cable 11 and the connection terminal 22 of the connection molded body 21 are connected. The connection method and its structure will be described in detail. After positioning with a positioning rod 31 as a positioning jig provided in a (welding apparatus, not shown), welding for connection is performed to form a welded portion 41 as a connecting portion. The positioning is performed using the flat conductor 12 of the flat cable 11 and the welding position is controlled based on the positioning.

  As shown in FIG. 2, the flat cable 11 is formed by covering a plurality of flat conductors 12 arranged in parallel with a gap therebetween with an insulating coating 13. Then, as shown on the left side of FIG. 2, dimensions such as full width W, total pitch PA, conductor width C, pitch P, margin width M, etc. are determined in advance.

  The connection molded body 21 is a connection part in which a plurality of connection terminals 22 arranged in parallel with a gap as shown in FIG. 1 are hardened with a synthetic resin 23, and is also called a primary mold. The synthetic resin 23 is located at one end in the longitudinal direction of the connection terminal 22 and has a long strip shape in a direction orthogonal to the longitudinal direction of the connection terminal 22.

  In the example shown in FIG. 1, welding for connection is performed after the flat conductor 12 of the flat cable 11 and the connection terminal 22 of the connection molded body 21 are superposed so as to be orthogonal to each other.

  In the welding, positioning is performed by the positioning rod 31 as described above. Prior to this, a part of the insulating coating 13 of the flat cable 11 is removed or the insulating coating 13 is not provided in advance, and is aligned in the width direction. The width direction outer edge 12b in the same direction as the width direction outer side of the flat angle conductor 12a of the provided flat angle conductor 12 on the outer side in the width direction is exposed.

  In the example of FIG. 1, since two positioning rods 31 are provided, a rectangular opening portion 14 in which portions corresponding to the positioning rods 31 are opened in a strip shape over the entire width is formed.

  The length L between the two open portions 14 is preferably set so that the flat cable 11 can be positioned even in the longitudinal direction of the flat cable 11 by being sandwiched between the positioning rods 31.

  The insulation coating 13 can be removed (formation of the open portion 14) by cutting the film that will become the insulation coating 13 at the stage before lamination with respect to the flat conductor 12, or by laser processing or hot pressing after the film lamination.

  Moreover, the open part 14 should just expose the width direction outer side edge 12b of the same direction as the said width direction outer side in the flat conductor 12a of the width direction outer side among the flat conductors 12 arranged in parallel by the width direction, For example, if the opening 14 is semicircular or the like as shown in FIG.

  After forming the open portion 14 as described above, the exposed flat conductor 12 is connected to the outer end 12b of the end of the flat conductor 12a in the direction (width direction) orthogonal to the longitudinal direction of the flat conductor 12 as described above. Positioning is performed by applying the positioning rod 31, and the welding position is determined based on the dimensions such as the conductor width C and the pitch P with reference to the position of the outer end 12b of the flat conductor 12a with which the positioning rod 31 is in contact. Welding is performed under control to form a welded portion 41.

  As shown in FIG. 1, the positioning rod 31 is arranged so as to abut on the surface 23a in the extending direction of the connection terminal 22 of the synthetic resin 23 of the connection molded body 21, and the positioning rod 31 is made of the synthetic resin. 23 and the rectangular conductor 12a, the rectangular conductor 12 and the connection terminal 22 can be correctly orthogonalized.

  As described above, when the rectangular conductor 12 is used as a reference, the longitudinal direction of the rectangular conductor 12 is determined from the margin cut surface 11a as compared with the case where the welding position is determined based on the margin cut surface 11a (see FIGS. 1 and 2). Since there is no need to consider the portion Ma (see FIG. 2) to the outer end 12b of the flat conductor 12a at the end in the direction orthogonal to the width (width direction), the cause of dimensional error due to meandering of the flat conductor 12 is eliminated. The matching accuracy between the calculated welding position and the actual welding position (the position of the welded portion 41) can be increased.

  As a result, the variation in the formation position of the welded portion 41 can be suppressed within the range of the dimensional tolerance between the flat conductor 12 and the insulating coating 13, and a stable connection state can be obtained.

In the correspondence between the configuration of the present invention and the configuration of the one aspect,
The positioning jig of the present invention corresponds to the positioning rod 31 described above,
The connecting portion corresponds to the welded portion 41,
The present invention is not limited to the configuration of the one form described above, and other forms can be adopted.

  For example, the number of positioning jigs may be one.

  In addition to welding, other means such as brazing can be used for the connection part, and a piercing connection terminal can also be used as the connection terminal.

  Furthermore, it is also possible to connect the flat conductor and the connection terminal by overlapping them with a line.

The top view which shows the state at the time of the connection of a flat cable and a connection molding. The top view of a flat cable. The top view which shows the state at the time of the connection of the flat cable which concerns on another example, and a connection molding. The top view which shows the state at the time of the connection of the flat cable which concerns on a prior art example, and a connection molding.

DESCRIPTION OF SYMBOLS 11 ... Flat cable 12 ... Flat conductor 12a ... Flat conductor of width direction outer side 12b ... Outer edge of width direction 13 ... Insulation coating 14 ... Opening part 22 ... Connection terminal 31 ... Positioning rod 41 ... Welding part

Claims (2)

The flat conductor of the flat cable having a plurality of flat conductors arranged in parallel in the width direction and an insulating coating covering these flat conductors is located at one end in the longitudinal direction and is long in the direction perpendicular to the longitudinal direction. A flat cable for connecting a plurality of connection terminals hardened with a synthetic resin having a band shape and a connection method of the connection terminals,
After exposing the width direction outer edge in the same direction as the width direction outside in the width direction outer flat conductor of the flat conductors arranged in parallel in the width direction,
The widthwise outer edge of the flat conductor is positioned so as to sandwich a positioning jig provided in a welding device between the long strip-shaped synthetic resin and the flat conductor ,
A connection method between a flat cable and a connection terminal for connecting the flat conductor and the connection terminal based on the position of the outer edge in the width direction of the flat conductor determined by the positioning jig. The flat conductor of the flat cable having a plurality of flat conductors arranged in parallel in the width direction and an insulating coating covering these flat conductors is located at one end in the longitudinal direction and is long in the direction perpendicular to the longitudinal direction. A connection structure of a flat cable and a connection terminal for connecting a plurality of connection terminals solidified with a synthetic resin in the form of a belt ,
An open portion that exposes a widthwise outer edge in the same direction as the widthwise outer side in the widthwise outer rectangular conductor among the flatness conductors arranged side by side in the width direction;
In addition to being exposed by the open portion, the positioning jig provided in the welding apparatus was determined with reference to the widthwise outer edge of the flat conductor positioned so as to be sandwiched between the long strip-shaped synthetic resin and the flat conductor . A connection structure of a flat cable and a connection terminal in which a connecting portion for connecting the flat conductor and the connection terminal is formed at a position.

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