JP3096644U - Flexible flat cable - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To provide a flexible flat cable that can reduce stress applied to a cable body by a reinforcing plate and hardly cause disconnection. SOLUTION: A flat reinforcing plate 2 made of a synthetic resin is bonded and fixed to a connection end portion 1a of a long and flat cable main body 1, and a substantially circular arc cross section is formed at a rear end portion of the reinforcing plate 2 in a longitudinal direction. A protruding portion 2a having a shape is formed so as to prevent disconnection of the contact portion 1b with the reinforcing plate 2 due to repetition of a bending operation accompanying a connection operation of the connection end 1a with the connector 3.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

  According to the present invention, a flat reinforcing plate is bonded to the connecting end of a long and flat cable body. It relates to a flexible flat cable fixed.

[0002]

[Prior art]

  A conventional flexible flat cable has a long length as shown in FIGS. 3 (a) and 3 (b). Attach a flat plate-like reinforcing plate 3B to the connection end 2 of the flat cable body 1 The portion of was connected to the connector 4.

[0003]   However, in this case, when the connecting operation to the connector 4 is repeated, The attached portion is repeatedly bent, and the rear end of the reinforcing plate 3B causes the cable body to move. 1 is easily stressed, and if it is repeatedly inserted into the connector 4, it may break. There was a problem that there was.

[0004]   The first conventional technique is shown in FIG. Flexible base portion 100 and base portion 1 00, one or a plurality of conductor portions 200 provided on one surface 110, and the conductor portion 200 are covered. The insulating covering portion 300 for covering, and the base portion 100 and the covering portion 300 are exposed. From the other surface 210 of the conductor portion 200 that has come out to the other surface 120 of the base portion 100, And a reinforcing member 400 fixed to the conductor portion 200 and the base portion 100. Of the conductor portion 200, the conductor portion 200 is exposed from the base portion 100 and the covering portion 300, and is supplemented. Reinforce the part where the strong member 400 is not fixed by bending it toward the reinforcing member 400. It is fixed to the member 400. (For example, refer to Patent Document 1).   However, in this, the structure is complicated, and bending work is required, which is troublesome. There was a problem.

[0005]   The second conventional technique is shown in FIGS. A plurality of terminals provided on the circuit board 10 In the pattern 12, a plurality of conductor patterns 13 provided on the flexible substrate 13 In the connection structure of the flexible base for crimping the c, the fixing pin 1 on the reinforcing plate 6a, and a through hole 10a on the circuit board and a through hole 13d on the flexible board. Is provided, and the fixing pin is inserted into the through hole to easily connect. Also the circuit Made of resin with a curved end surface provided so as to cover the end surface 10a and the back surface of the substrate. Stack the reinforcing plate 16 on the circuit board and fold the flexible board at the end of the reinforcing plate. Then, it is returned and fixed by the clip member 15 having a substantially U-shaped elasticity. Flexible base Since the plate is folded back at the end surface of the reinforcing plate with a curved surface, it is fixed under any tension. It does not hurt even if set. (For example, refer to Patent Document 2).   However, in this case, it is necessary to provide the reinforcing plate 16 with the fixing pins 16a and 16a. Need to be fixed by the clip member 15, and the structure is complicated and There was a problem that the assembly work was troublesome.

[0006]   A third conventional technique is shown in FIGS. The reinforcing plate 53 of the present application is a frame It is used by being attached to the Kisible flat cable 54, and at least one end is The strength becomes weaker toward the end. (For example, see Patent Document 3) .   However, in this case, the area of the portion of the reinforcing plate 53 where the strength becomes weak is There was a problem of getting bigger.

[0007]

[Patent Document 1]   JP, 10-199341, A

[Patent Document 2]   JP, 2001-196715, A

[Patent Document 3]   Japanese Utility Model Publication No. 7-36374

[0008]

[Problems to be solved by the device]

  The present invention reduces the stress on the cable body by the reinforcing plate The purpose is to provide a flexible flat cable that is unlikely to occur .

[0009]

[Means for Solving the Problems]

  The present invention has been proposed to solve the above problems, and is described in claim 1. The idea of the mounting is that the long and flat cable body is connected to the connecting end by a flat plate made of synthetic resin. In the case of a flexible flat cable with a strong plate glued and fixed, A protrusion having a substantially arc-shaped cross section is formed at the rear end of the reinforcing plate in the longitudinal direction. The reinforcing plate by repeating the bending operation accompanying the connecting operation with the connector at the connecting end; It is characterized in that it is configured to prevent disconnection of the contact portion of the.

[0010]   According to a second aspect of the present invention, a flat plate-like member is provided at the connecting end of the long and flat cable body. In a flexible flat cable with a reinforcing plate bonded and fixed, A projecting portion having a curved cross section is formed at the rear end portion in the longitudinal direction of the reinforcing plate, and The reinforcing plate by repeating the bending operation accompanying the connecting operation with the connector at the connecting end; It is characterized in that it is configured to prevent disconnection of the contact portion of the.

[0011]   According to a third aspect of the present invention, the protruding portion at the rear end portion in the longitudinal direction of the reinforcing plate is the case. It has a special semi-circular shape with a curved surface that contacts the bull body. It is a sign.   The invention according to claim 4 is characterized in that the reinforcing plate is made of synthetic resin. I am trying.

[0012]

[Embodiment of device]

  The embodiments of the flexible flat cable according to the present invention will be described below. Will be described with reference to.   FIG. 1 shows a flexible flat cable according to a first embodiment of the present invention, (a) Is a side view thereof, and (b) is a perspective view thereof.

[0013]   The flexible flat cable of the first embodiment is shown in FIGS. As shown in FIG. 1, the connecting end portion 1a of the long and flat cable body 1 is made of a synthetic resin flat plate. The reinforcing plate 2 is adhered and fixed, and the longitudinal direction of the reinforcing plate 2 A projecting portion 2a having a substantially arcuate cross section is formed at the rear end portion toward the front.   The bending of the connecting end portion 1a of the cable body 1 with the connector 3 is performed. The disconnection of the contact portion 1b with the reinforcing plate 2 due to the repeated bending operation is prevented.

[0014]   Therefore, according to the first embodiment, the connecting end portion 1a of the cable body 1 is Even if the bending is repeated, the curved surface of the protruding portion 2a of the reinforcing plate 2 having a substantially arcuate cross section is Since it abuts on the cable body 1, the reinforcement plate 2 on the cable body 1 causes the stress It is possible to reduce the breakage and prevent disconnection.

[0015]   FIG. 2 shows a flexible flat cable of the second embodiment, (a) of which side. A side view, (b) is the perspective view.   The flexible flat cable according to the second embodiment is shown in FIGS. As described above, the protruding portion 2b at the rear end portion in the longitudinal direction of the reinforcing plate 2 comes into contact with the cable body 1. The curved portion is formed in a substantially semi-circular shape. And the cable body 1 By repeating the bending operation associated with the connection operation of the connection end portion 1a with the connector 3 The breakage of the contact portion 1b with the strong plate 2 is prevented.

[0016]   Therefore, according to the second embodiment, the connecting end portion 1a of the cable body 1 is Even if the bending is repeated, the curved surface of the protruding portion 2b of the reinforcing plate 2 having a substantially semi-circular shape is formed. Since it abuts on the bull body 1, stress due to the reinforcing plate 2 applied to the cable body 1 It is possible to reduce the wire breakage.   The shapes of the protrusions 2a and 2b of the reinforcing plate 2 are the same as those in the above-described first and second embodiments. It is needless to say that the shape is not limited to the extended shape and may be another shape having a curved surface.

[0017]

[Effect of device]

  As described above, the device according to claim 1 has a long and flat cable body connection. A flexible plate with a synthetic resin plate reinforcing plate bonded and fixed to the connecting end. In a sibble flat cable, the reinforcing plate has a substantially arc-shaped cross section at the rear end in the longitudinal direction. Shaped protrusions are formed to prevent bending of the connecting end with the connector. Since it is configured to prevent disconnection of the contact part with the reinforcing plate due to repetition, Produces the effect.   That is, even if the connecting end of the cable body is repeatedly bent, the reinforcing plate will not break. Since the curved surface of the protrusion with a substantially arcuate shape contacts the cable body, The stress due to the stiffening plate can be reduced, and disconnection is less likely to occur.

[0018]   According to a second aspect of the present invention, a flat plate-like member is provided at the connecting end of the long and flat cable body. In a flexible flat cable with a reinforcing plate bonded and fixed, A projecting portion having a curved cross section is formed at the rear end portion in the longitudinal direction of the reinforcing plate, and the connecting end portion is formed. Breakage of the contact part with the reinforcing plate due to repeated bending movements accompanying the connection operation with the connector Since it is configured to prevent the lines, the following effects are achieved.   That is, even if the connecting end of the cable body is repeatedly bent, the reinforcing plate will not break. Since the curved surface of the curved surface-shaped protrusion contacts the cable body, The stress due to the reinforcing plate can be reduced and disconnection can be less likely to occur.

[0019]   According to a third aspect of the present invention, the protrusion of the rear end portion in the longitudinal direction of the reinforcing plate is the cable body. Since it is formed in a substantially semi-circular shape where the part that contacts the Even if the connecting end of the body is repeatedly bent, the protruding part of the reinforcing plate in a substantially semi-circular shape The curved surface of the cable contacts the cable body, so Can be reduced and disconnection is less likely to occur.

[0020]   According to the invention of claim 4, the reinforcing plate is made of synthetic resin. Due to the elasticity of the resin, the stress on the cable body can be reduced, and the reinforcing plate Can be easily molded.

[Brief description of drawings]

FIG. 1 shows a flexible flat cable of a first embodiment, (a) is a side view thereof, and (b) is a perspective view thereof.

FIG. 2 shows a flexible flat cable of a second embodiment, (a) is a side view thereof, and (b) is a perspective view thereof.

FIG. 3 shows a conventional flexible flat cable,
(A) is the side view, (b) is the perspective view.

FIG. 4 is a schematic cross-sectional view showing a manufacturing process of a conventional flexible cable.

FIG. 5 is an exploded perspective view showing a terminal connecting portion of a conventional flexible substrate connecting structure.

FIG. 6 is an enlarged cross-sectional view showing the same structure.

FIG. 7 is a schematic side view showing a connected state of an FFC to which a reinforcing plate of a conventional flexible flat cable is applied.

FIG. 8 shows the reinforcing plate, (a) is a side view thereof, and (b) is a side view thereof.
Is a plan view thereof.

FIG. 9 is a plan view showing another shape of the reinforcing plate.

[Explanation of symbols]

1 cable body 1a Connection end 1b Contact part 2 Flat plate-shaped reinforcing plate 2a Projection with a substantially arcuate cross section 2b Semi-circular protrusion 3 connectors

Claims (4)

[Scope of utility model registration request] 1. A flexible flat cable in which a synthetic resin flat plate-like reinforcing plate is adhered and fixed to a connecting end part of a long and flat cable body, wherein a longitudinal rear end part of the reinforcing plate. A flexible structure characterized in that a projecting portion having a substantially arcuate cross section is formed, and is configured to prevent disconnection of a contact portion with the reinforcing plate due to repeated bending operations associated with the connecting operation of the connecting end portion with the connector. Flat cable. 2. A flexible flat cable in which a flat reinforcing plate is adhered and fixed to a connecting end portion of a long and flat cable main body, wherein a longitudinal section rear end portion of the reinforcing plate has a curved cross section. A protrusion is formed,
A flexible flat cable, which is configured to prevent disconnection of a contact portion with the reinforcing plate due to repetition of bending operation associated with connection operation of the connection end portion with the connector. 3. The projecting portion at the rear end portion in the longitudinal direction of the reinforcing plate is formed in a substantially semi-circular arc shape in which a portion in contact with the cable body is a curved surface.
Flexible flat cable described in. 4. The flexible flat cable according to claim 2, wherein the reinforcing plate is made of synthetic resin.