JP5408721B2 - connector - Google Patents

Description

  The present invention relates to a connector that is provided at an end of a flexible flat cable (FFC), for example, and is used by being connected to a mating connector.

  Conventionally, this type of connector is provided at the end of a flat cable formed by covering a plurality of conductors arranged in the width direction with an insulating material, and inserted into the opening of the mating connector, A device in which a conductor and each terminal of a mating connector are connected is known (see, for example, Patent Document 1).

  In this connector, a protruding portion to be inserted into the opening of the mating connector is provided at one end of a housing made of a synthetic resin molding, and the conductor with the sheath removed is held in the housing while holding the end of the flat cable. It arrange | positions on the lower surface of a protrusion part, and makes each conductor of a protrusion part contact each terminal of the other party connector.

  However, in the connector, since the conductor is disposed only on the lower surface of the protruding portion, there is a problem that the contact position with the mating terminal is only one place with one conductor and the connection reliability is poor. In addition, since the tip of the conductor comes into contact with the mating terminal when the protruding portion is inserted, there is a problem that the conductor is easily deformed or peeled off.

  Therefore, the coating on the front end side of the flat cable is removed to remove a part of the covering, and each conductor of the covering removal portion of the flat cable is folded from the one surface of the protruding portion to the other surface through the front end side, If the conductor on the protruding part is held in contact with the mating terminal by overlapping the covering part on the tip side of the flat cable and the other covering part, it will protrude into the bifurcated mating terminal. By inserting the portion, the conductor and the mating terminal can be brought into two-point contact on both surfaces of the protruding portion. In this case, since the conductor is folded back at the tip end side of the protruding portion, it is possible to prevent the conductor from being deformed or peeled off due to contact with the counterpart terminal.

  In order to make the connector configured as described above waterproof, a second housing that covers a portion other than the protruding portion of the first housing that holds the flat cable is formed by injection molding of a synthetic resin, The two housings can be configured to close the gap between the flat cable and the first housing (see, for example, Patent Document 2).

JP 2002-50441 A JP 2008-269858 A

  By the way, in the waterproof structure in which the first housing is covered by the synthetic resin second housing as described above, a softer resin than the first housing is used for the second housing. However, when different types of resins cannot be completely adhered to each other and a part of the housing (for example, the mounting portion of the lock fitting) is exposed from the second housing, the second housing and the first housing There is a risk of water intruding between. In such a case, the water that has entered may pass between the overlapping portions of the flat cable and reach the conductor side of the covering removal portion, thereby causing a short circuit between the conductors.

  The present invention has been made in view of the above problems, and the object of the present invention is to remove the coating even in a configuration in which a portion of the coating of the flat cable is removed and the conductor of the coating removal portion is folded back. It is an object of the present invention to provide a connector capable of improving the waterproofness of a portion of a conductor.

  In order to achieve the above object, the present invention is provided at the end of a flat cable that covers a plurality of conductors arranged in the width direction, and is inserted into the opening of the mating connector, thereby allowing each conductive A connector for connecting a body and each terminal of a mating connector, having a protrusion inserted into the opening of the mating connector, and removing a part of the other coating while leaving the coating on the tip side By folding each conductor of the cable sheath removal part from one surface of the projecting portion to the other surface through the tip side, and overlapping the sheath portion and the other sheath portion on the tip side of the flat cable, A first housing that holds each conductor of the projecting portion in contact with each terminal of the mating connector; and an insertion portion that is inserted into the opening of the mating connector, other than the projecting portion of the first housing. portion A second housing formed to cover, and an elastically deformable seal portion that seals between the outer peripheral surface of the mating connector and the inner peripheral surface of the mating connector is provided on the outer peripheral surface of the insertion portion. The covering portion on the tip side of the flat cable and the other covering portion are pressed against each other by the pressure received from the inner peripheral surface of the mating connector.

  As a result, the covering portion on the distal end side of the flat cable and the other covering portion are pressed against each other by the pressure that the insertion portion receives from the inner peripheral surface of the mating connector by the press-fitting of the seal portion provided on the outer peripheral surface of the insertion portion. The water that has entered between the first housing and the second housing does not pass between the overlapping portions of the flat cable and reach each conductor side of the protrusion.

  According to the present invention, water that has entered between the first housing and the second housing does not pass between the overlapping portions of the flat cable and reach each conductor side of the protruding portion. Even in a configuration in which a part of the coating is removed and the conductor in the coating removal portion is folded back, the waterproofness of each conductor in the coating removal portion can be improved.

The perspective view of the connector which shows one Embodiment of this invention Side sectional view of connector A perspective view of the first housing Partial perspective view of flat cable Side view of connector manufacturing process Side sectional view showing the process of inserting into the mating connector Side sectional view showing the process of inserting into the mating connector Side sectional view showing the connection with the mating connector

  1 to 8 show an embodiment of the present invention. The connector 10 shown in the figure is provided at the end of the flat cable 1 and is used by being connected to the mating connector 20.

  The connector 10 of the present embodiment is related to a first housing 11 that holds the flat cable 1, a second housing 12 that covers a part of the flat cable 1 and a part of the first housing 11, and a mating connector. And a locking member 13 to be joined.

  The flat cable 1 includes a plurality of strip-shaped conductors 2 arranged in the width direction, and an insulating coating 3 (for example, soft PVC (polyvinyl chloride)) that covers each of the conductors 2. The other part of the coating 3 is removed by the predetermined length L2 while leaving the coating 3 of the predetermined length L1 on the part 1a.

  The first housing 11 has a protruding portion 11a inserted into the mating connector 20 and a main body portion 11b formed on the rear end side of the protruding portion 11a, and is formed of a synthetic resin (for example, nylon) molded product. Is formed.

  The protruding portion 11 a is formed in a flat plate shape extending in the width direction of the first housing 11, and engaging portions 11 c that engage with the mating connector 20 are provided on both sides in the width direction. The protrusion 11a is provided with a plurality of protrusions 11d extending in the thickness direction on both sides and the front end face, spaced apart from each other in the width direction, and the covering of the flat cable 1 is removed between the protrusions 11d. Part of each conductor 2 is arranged. In this case, the front end portion 1a of the flat cable 1 is disposed behind the projecting portion 11a, and the conductors 1a of the covering removal portion are disposed over both the thickness direction both sides and the front end surface of the projecting portion 11a, and The covering portion other than the tip portion 1a of the cable 1 is disposed behind the protruding portion 11a so as to face the tip portion 1a.

  The main body portion 11b is formed so as to extend in the width direction of the first housing 11, and on one side in the thickness direction of the protruding portion 11a so as to straddle a pair of side wall portions 11e extending rearward from each engaging portion 11c of the protruding portion 11a. It is unevenly distributed. An attachment portion 11f to which the lock member 13 is attached is provided on the outer surface side of the main body portion 11b, and the attachment portion 11f fixes the lock member 13 between the pair of convex portions 11g in the width direction.

  The second housing 12 is formed so as to cover the main body portion 11b of the first housing 11 and the flat cable 1 except for the protruding portion 11a, the attachment portion 11f of the first housing 11, and the respective convex portions 11g, and is made of synthetic resin. (For example, it is formed in the outer side of the main-body part 11b by injection molding of soft PVC (polyvinyl chloride)). The second housing 12 is provided with an insertion portion 12a that is press-fitted into the mating connector 20, and the insertion portion 12a is formed to be located behind the protruding portion 11a. The outer peripheral surface of the insertion portion 12a is provided with a plurality of elastically deformable seal portions 12b hermetically sealed with the inner peripheral surface of the mating connector. When the insertion portion 12a is inserted into the mating connector, each seal portion 12b is It comes into pressure contact with the inner peripheral surface of the mating connector. Each seal part 12b consists of the annular protrusion extended in the circumferential direction of the insertion part 12a, and is mutually arrange | positioned at intervals in the length direction of the insertion part 12a. In this case, each seal portion 12b is tapered so that the thickness dimension gradually decreases from the proximal end side toward the distal end side.

  The lock member 13 is fixed to an engagement piece 13 a that engages with the mating connector 20, an operation piece 13 b that displaces the engagement piece 13 a in the disengagement direction, and each convex portion 11 g of the first housing 11. It consists of a pair of fixing pieces 13c in the width direction, and is formed by bending a metal plate. The engaging piece 13a has an engaging hole 13d that engages with the mating connector, and is formed to be elastically deformable in the thickness direction. The operation piece 13b is formed so as to extend obliquely toward the outer side of the lock member 13, and the engagement piece 13a is displaced in the disengagement direction by being pressed toward the first housing 11 side. Each fixing piece 13c is formed to be elastically deformable in the width direction, and is fixed to the mounting portion 11f of the first housing 11 by being press-fitted between the respective convex portions 11g.

  Here, the manufacturing process of the connector 10 will be described. First, as shown in FIG. 5 (a), the front end portion 1a of the flat cable 1 is disposed behind the protruding portion 11a of the first housing 11 so as to be located inside the main body portion 11b. Next, as shown in FIG. 5 (b), each conductor 2 of the coating removal portion of the flat cable 1 is folded back from one surface side in the thickness direction of the projecting portion 11a to the other surface side, and the distal end portion of the flat cable 1 Superimpose on 1a. Thereafter, as shown in FIG. 5 (c), the main body portion 11b of the first housing 11 and the flat cable 1 are covered except for the protruding portion 11a, the mounting portion 11f, and the convex portions 11g of the first housing 11. After the second housing 12 is formed by injection molding, the connector 10 is completed by attaching the lock member 13 to the attachment portion 11f.

  The mating connector 20 to which the connector 10 is connected includes a housing 21 having an opening 20 a at one end and a plurality of terminals 22 held in the housing 21, and the connector 10 has an opening 20 a in the housing 21. The protruding portion 11a is inserted. A projection 21 a that engages with the lock member 13 of the connector 10 is provided on one side of the housing 21. One end of each terminal 22 is provided with a pair of elastic pieces 22a formed in a bifurcated shape, and each elastic piece 22a is provided with a contact portion 22b that contacts each conductor 2 of the connector 10. . Further, a connection portion 22 c connected to the substrate 30 is provided on the other end side of each terminal 22.

  That is, when the connector 10 is inserted into the housing 21 of the mating connector 20, the protrusions 11a are inserted between the elastic pieces 22a of the terminals 22 as shown in FIG. The contact portions 22b of the elastic pieces 22a are in contact with the conductors 2, respectively. Thereafter, as shown in FIG. 8, the insertion portion 12 a located behind the protruding portion 11 a is inserted into the housing 21, and the seal portions 12 b of the insertion portion 12 a are pressed against the inner peripheral surface of the housing 21 while being elastically deformed. Thereby, between the outer peripheral surface of the insertion part 12a and the inner peripheral surface of the housing 21 is sealed by each seal part 12b. When the connector 10 is inserted into the mating connector 20, the engaging piece 13a of the lock member 13 gets over the protrusion 21a of the housing 21 while being elastically deformed, and the engaging hole 13d of the engaging piece 13a engages with the protrusion 21a. Then, the connector 10 and the mating connector 20 are locked by the lock member 13. When releasing the connection with the mating connector 20, when the operation piece 13b of the lock member 13 is pressed, the engagement piece 13a is displaced outward and the engagement with the protrusion 21a is released, and the connector 10 is released from the mating connector. 20 can be removed.

  In the connector 10, since the second housing 12 is formed so as to cover the first housing 11, the second housing 12 is provided between the second housing 12 and the first housing 11. Although the first housing 11 and the second housing 12 are made of different kinds of resins, they cannot be completely adhered to each other as shown by the solid line arrows in FIG. There is a risk that water may enter between the first housing 11 and the second housing 12. However, in the connector 10 of this embodiment, when the insertion portion 12a is inserted into the housing 21 of the mating connector 20, the insertion portion 12a is inserted into the housing 21 by press-fitting each seal portion 21b as indicated by the black arrow in FIG. Since the coating 3 of the front end 1a of the flat cable 1 and the coating 3 of the other portion facing the flat cable 1 are in pressure contact with each other, the invading water overlaps the coating 3 It does not reach the respective conductors 2 side of the protrusion 11a through the portions.

  Thus, according to the connector of this embodiment, it has a protrusion part inserted in the opening part 20a of the other party connector 20, and a part of other coating | cover 3 is removed leaving the coating | cover 3 of the front-end | tip part 1a. Each conductor 2 of the covering removal portion of the flat cable 1 is folded from one surface of the protruding portion 11a of the first housing 11 to the other surface through the leading end side, and the covering portion of the leading end portion 1a of the flat cable 1 Since the conductor 2 of the protrusion 11a is held so as to be in contact with the bifurcated mating terminal 22, the conductor 2 and the counterpart are opposed to each other on both surfaces of the protrusion 11a. The side terminals 22 can be brought into contact with each other at two points, and the connection reliability can be improved. In this case, since the conductor 2 is folded back at the tip end side of the projecting portion 11a, deformation and peeling of the conductor 2 due to contact with the mating terminal 22 can be prevented, thereby improving durability. You can also.

  Also, the second housing 12 covering the first housing 11 is provided with an insertion portion 12a to be inserted into the opening 20a of the mating connector 20, and the insertion portion is inserted by press-fitting a seal portion 12b provided on the outer peripheral surface of the insertion portion 12a. The first housing 11 and the second housing 12 are configured such that the covering portion of the distal end portion 1a of the flat cable 1 and the other covering portion are brought into pressure contact with each other by the pressure that 12a receives from the inner peripheral surface of the mating connector 20. Water that has entered between the two passes through between the overlapping portions of the flat cable 1 and does not reach the respective conductors 2 side of the projecting portion 11a, so that the waterproofness of each conductor 2 can be enhanced.

  In this case, since the seal portion 12b is formed integrally with the insertion portion 12a, it is not necessary to attach another part such as an O-ring, and productivity can be improved.

  Further, since the seal portion 12b is formed by an annular protrusion extending in the circumferential direction of the insertion portion 12a, and the plurality of seal portions 12b are provided at intervals in the longitudinal direction of the insertion portion 12a, the outer peripheral surface of the insertion portion 12a is opposed to the counterpart. The space between the inner peripheral surface of the side connector 20 can be reliably sealed, which is extremely advantageous for improving the waterproofness between the connectors 10 and 20.

  DESCRIPTION OF SYMBOLS 1 ... Flat cable, 1a ... Tip part, 2 ... Conductor, 3 ... Cover | cover, 10 ... Connector, 11 ... 1st housing, 11a ... Projection part, 12 ... 2nd housing, 12a ... Insertion part, 12b ... Seal Part, 20 ... mating connector, 20a ... opening, 22 ... terminal.

Claims (3)

Provided at the end of a flat cable that covers multiple conductors arranged in the width direction, and connects each conductor to each terminal of the mating connector by inserting it into the opening of the mating connector In the connector to
Each of the conductors of the stripped portion of the flat cable has a protruding portion inserted into the opening of the mating connector, and a portion of the other coating is removed leaving the tip side coating. Folds from the surface to the other surface through the tip side, and contacts each conductor of the protruding part with each terminal of the mating connector by overlapping the covering portion on the tip side of the flat cable with another covering portion. A first housing capable of holding;
A second housing having an insertion portion to be inserted into the opening of the mating connector and formed to cover a portion other than the protruding portion of the first housing;
An elastically deformable seal is provided on the outer peripheral surface of the insertion portion to seal between the inner peripheral surface of the mating connector,
A connector characterized in that a cover portion on the distal end side of the flat cable and another cover portion are pressed against each other by pressure received by the insertion portion from the inner peripheral surface of the mating connector by press-fitting the seal portion. The connector according to claim 1, wherein the seal portion is formed integrally with the insertion portion. The connector according to claim 1, wherein the seal portion is formed by at least one annular protrusion extending in a circumferential direction of the insertion portion.

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