JP4885705B2 - Harness connector - Google Patents

Description

The present invention relates to a harness connector used for a harness circuit of an automobile, for example.

  In an automobile harness circuit, it is often necessary to branch a plurality of branch lines from a trunk line. Therefore, conventionally, a part of the trunk line is stripped, a splice joint method that branches by crimping the branch line to the exposed conductor, and a circuit branch connector is arranged at the terminal part of the trunk line. For example, two types of methods such as a joint connector method described in Patent Document 1 are often used for branching using a general-purpose connector and a crimp terminal.

JP-A-2005-71614

  In the former splice joint method, one to three electric wires must be crimped, and there is a problem that workability is very poor in the state after the machining, and crimping is performed on the production line. Is difficult for line production.

  Therefore, the latter joint connector system has been developed as a solution to the problems of the splice joint system. This joint connector method enables joint processing on the harness production line, so that the production efficiency is improved as compared with the splice joint method, and it is possible to cope with the modification of the harness circuit. However, since the number of components such as the connector and the mating general-purpose connector, bus bar, and electric wire terminal to be increased increases, it takes a long time to assemble the harness circuit.

  In particular, in the wire harness using the joint connector disclosed in Patent Document 1, since the joint connector is large, it cannot be branched at a position to be branched. Therefore, it is necessary to extend the electric wire to a place where there is a space that can accommodate the joint connector, which is against the miniaturization of the wire harness.

  In other words, the joint connector system also has many problems that need to be solved, such as space saving, further improvement of workability, simplification of the structure, and waterproofing of the circular portion.

The objective of this invention is providing the harness connection body which was easy to manufacture and was excellent in the assembly property of a wire harness which solves the above-mentioned subject.

Technical characteristics of the harness connector according to the present invention for achieving the above object includes an external holder having a plurality of wire terminal insertion openings, in the insertion to the outer holder from the inlet portion provided in the outer holder And having an electric wire terminal holding hole communicating with the electric wire terminal insertion port, an internal holder having a pin terminal insertion hole intersecting with the electric wire terminal holding hole, and having a connecting portion at one end and an intermediate portion A wire terminal having a locking portion for positioning, further connecting an electric wire to the other end, and inserting the connection portion into the wire terminal holding hole of the internal holder through the wire terminal insertion port, and an inlet of the external holder It becomes a by inserting the pin terminal insertion hole of the inner holder from parts in contact with the contacts of the connecting portion of the wire terminal in the inner holder the wire terminals to each other and a pin terminal electrically connected to the internal The wire terminal holding holes of the holder is provided a holding plate of the movable holding the wire terminal, in providing the locking portion engages the engaging portion of the wire terminal in the holding plate.

According to the harness connector according to the present invention, the inner holder is placed in the outer holder, the electric wire terminal is inserted into the inner holder through the electric wire terminal insertion port of the outer holder and positioned, and the electric wire is connected by the pin terminal in the inner holder. Conducts electrical connection between terminals. Moreover, the electric wire terminal can be removed, and the electric wire terminal can be recombined.

  Furthermore, the installation location in the wire harness is not limited due to the miniaturization, and the wiring harness can be arranged at an arbitrary location, and circuit wiring can be performed without extending the electric wire.

  In particular, when used in a harness circuit of an automobile, the connection structure becomes much more compact than the conventional joint structure, and the wire harness working time is shortened.

The present invention will be described in detail based on the embodiments shown in the drawings.
As shown in the exploded perspective view of FIG. 1, the harness connection body includes a rectangular parallelepiped external holder 1 having a plurality of wire terminal insertion openings 1a, an internal holder 2 having wire terminal holding holes 2a and pin terminal insertion holes 2b, A cylindrical contact 3b is provided at the front end connecting portion 3a, and a plurality of wire terminals 3 having a wire 4 connected at the rear end, a rod-shaped through pin type pin terminal 5, and a waterproof member 6 made of synthetic rubber. ing.

  The outer holder 1 has, for example, two wire terminal insertion openings 1a each having a circular cross section from the left and right sides toward the center, and a space portion 1b into which the inner holder 2 is inserted is provided. Further, for example, an opening 1c for inserting the internal holder 2 is provided on the lower surface.

  As a material used as the external holder 1, for example, a thermoplastic synthetic resin is applied. Among them, polybutylene terephthalate (PBT) and polypropylene (PP) are used in view of high thermal deformation temperature, high rigidity, electrical insulation characteristics, and mechanical characteristics. And the like are preferred. The vertical and horizontal sizes may be appropriately determined depending on the number and diameter of the electric wires 4 to be used, but the length is usually about 20 mm to 150 mm. The external holder 1 is generally manufactured by adopting a method in which a thermoplastic resin is injection-molded using a predetermined mold.

  The inner holder 2 has a substantially rectangular parallelepiped shape. As shown in the cross-sectional view of FIG. 2, when the inner holder 2 is housed in the space 1 b of the outer holder 1, the inner holder 2 communicates with the wire terminal insertion port 1 a to connect the wire terminal 3. A wire terminal holding hole 2a for inserting the portion 3a is provided in the horizontal direction. Further, the pin terminal insertion hole 2b that intersects with the electric wire terminal holding hole 2a is formed in the vertical direction. In addition, 2a 'has shown opening of the opposite side to the insertion side of the electric wire terminal holding hole 2a. A movable holding plate 2c whose tip is movable is formed on the upper side of each wire terminal holding hole 2a, and a locking claw 2d for positioning the wire terminal 3 is provided on the lower surface of the movable holding plate 2c. Yes.

  In addition, the inner holder 2 is provided with grooves 2e for inserting a jig, which will be described later, on both sides in the vicinity of the inlet portions of the electric wire terminal holding holes 2a of the inner holder 2 in order to push up the movable holding plate 2c. ing. The operation pieces 2f project laterally on both sides of each movable holding plate 2c, and these operation pieces 2f are formed so as to be displaced forward and backward between the upper and lower movable holding plates 2c.

  Further, for example, two hook-shaped locking projections 2g for locking the waterproof member 6 protrude downward from the lower portion of the inner holder 2. A rib 2h is formed on one side of the outer surface of the inner holder 2, and no rib is provided on the other side. A groove portion for receiving the rib 2h is formed in the space 1b into which the inner holder 2 of the outer holder 1 is inserted. ing.

  The material of the inner holder 2 may be the same as that of the outer holder 1 and is preferably manufactured by injection molding. Further, when the internal shape is complicated, it can be divided into a plurality of parts, and can be formed by bonding or fitting at the time of use.

  The electric wire terminal 3 is formed by punching one conductive metal plate, and a cylindrical contact 3b drawn into a short cylindrical shape is provided downward on a tongue-like connecting portion 3a at the front end. Yes. Furthermore, a locking hole 3c for fitting into the locking claw 2d of the internal holder 2 is provided in the intermediate part, and a conductor crimping part 3d and a covering crimping part 3e are provided at the rear end. The conductor of the electric wire 4 is crimped and connected by the conductor crimping portion 3d, and a cylindrical seal member 7 made of synthetic rubber is inserted into the electric wire 4 for waterproofing, and a part thereof is fixed together with the electric wire covering for fixing. It is crimped and fixed by the coated crimping part 3e.

  The wire terminal 3 may be formed by stamping and molding a copper plate or copper alloy plate into a predetermined shape, or by Sn plating, or by punching and molding a Sn plated copper plate or copper alloy plate into a predetermined shape. . The material is preferably brass in terms of strength and conductivity, and is further preferable in that the corrosion resistance is improved by Sn plating and the conductivity with the contact with the pin terminal 5 is easily obtained.

  The cylindrical contact 3b only needs to have a shape that allows electrical conduction when in contact with the pin terminal 5, and a tapered guide is provided at the base and tip of the cylindrical contact 3b so that the pin terminal 5 can be inserted from either side. It is desirable. Further, the contact 3b provided in the connecting portion 3a is not cylindrical as in the embodiment, but (a) a circular hole shape as shown in FIG. 3, (b) a hole portion of a polygonal hole (c) a semicircular shape. , (D) U-shaped, (e) V-shaped, and (f) square cutout. However, in view of conductivity, connection durability, etc., a cylindrical shape and a hole shape are preferable.

  As the electric wire 4, an insulated electric wire in which an outer periphery of a conductor is covered with an insulating layer is applied, and those having a known electric wire diameter can be applied. The conductor is a twisted wire or a single wire of a copper alloy wire such as a Cu-Sn alloy wire that maintains a tensile strength and has a small wire diameter, such as a conventional copper wire or a hard copper wire used in an automobile harness circuit. Applied. In addition, conventionally known insulating materials are applied to the insulating layer, and among them, it is preferable to apply a non-halogen insulating material to the insulating layer as an environmental measure.

  The conductor connection between the conductor of the electric wire 4 and the electric wire terminal 3 may be known caulking, welding, soldering, crimping, etc., but in terms of conductivity, connectivity, and connection strength obtained, Such a crimping connection by the conductor crimping part 3d is suitable.

  The pin terminal 5 is a conductive metal rod-like member that is inserted into the pin terminal insertion hole 2b of the inner holder 2 and electrically connects the connection portions 3a of the plurality of electric wire terminals 3, and has a circular, triangular, or quadrangular cross-sectional shape. And polygons. However, it is easy to manufacture, does not require a large force when inserted, and is easy to obtain stable and reliable conduction, so that a square cross section is preferable. In this case, the contact shape of the wire terminal 3 is A cylindrical shape or a circular hole shape is preferred.

  For example, the pin terminal 5 is obtained by bending and folding a single conductive metal plate to obtain a substantially rectangular cross section as shown in FIG. it can. By producing by such a method, even the pin terminal 5 having a small cross-sectional area is less likely to be bent or broken.

  Moreover, it is preferable to insert the pin terminal 5 while deforming the side of the connection part 3a of the wire terminal 3 by making the hardness of the pin terminal 5 harder than that of the connection part 3a. The hardness of the pin terminal 5 and the hardness of the connecting portion 3a can be appropriately adjusted by processing, heat treatment, and material selection. Furthermore, it is preferable that the tip is a conical trapezoidal shape such as a conical shape, a pyramid shape, a truncated cone shape, a truncated pyramid shape, or the like, in order to be surely inserted into the cylindrical contact 3b.

  When the contact of the connecting portion 3a is cylindrical or circular, the inner diameter is d1, the cross-sectional shape of the pin terminal 5 is substantially square, and the length of the diagonal line is x, d1 <x. preferable. Alternatively, the pin terminal 5 may have a circular cross section, and the contact of the connecting portion 3a may be a hole having a square side of d1 in length. When the circular outer diameter of the pin terminal 5 in this case is d2, it is preferable that d1 <d2.

  The waterproof member 6 is a rectangular parallelepiped that fits into the opening 1c of the external holder 1, and a corrugated portion 6a is formed around it. Further, a locking hole 6 b into which the locking projection 2 g of the internal holder 2 is inserted is provided on the upper surface of the waterproof member 6.

FIG. 5 shows a sectional view of the assembled state. First, when the internal holder 2 is inserted into the space 1b of the external holder 1, the internal holder 2 is fixed in the space 1b by an engagement mechanism (not shown). At the time of this insertion, the ribs 2h arranged asymmetrically on the front and rear surfaces are fitted into the grooves of the space 1b , so that the insertion direction is not mistaken.

  Subsequently, when the electric wire terminals 3 are inserted from a total of four electric wire terminal insertion openings 1 a provided in the external holder 1, for example, the connection portion 3 a of the upper right electric wire terminal 3 pushes up the movable holding plate 2 c in the internal holder 2. Inserted. When the locking claw 2d of the inner holder 2 is fitted into the locking hole 3c, the movable holding plate 2c is restored to its original position like the lower right wire terminal 3. Thereby, the electric wire terminal 3 is positioned at a predetermined position, and the center of the cylindrical contact 3b of the connecting portion 3a matches the central axis of the pin terminal insertion hole 2b.

  In the embodiment, since the cylindrical contacts 3b are stacked at the center of the inner holder 2, the wire terminal insertion port 1a is formed in a stepped manner on the left and right. When the electric wire terminal 3 is inserted into the inner holder 2, the seal member 7 provided on the electric wire terminal 3 comes into close contact with the inner wall of the electric wire terminal insertion port 1a of the outer holder 1, and water from the outside is prevented.

  When the connecting portion 3a is inserted into the wire terminal insertion port 1a, it is important which side the cylindrical contact 3b is facing. That is, if each connection portion 3a is inserted in an arbitrary direction, it cannot be neatly positioned at a predetermined position inside, so that it is necessary to display the direction of the cylindrical contact 3b at the entrance of the wire terminal insertion port 1a. It may be.

  After inserting the electric wire terminal 3 in this way, as shown in FIG. 6, when the pin terminal 5 is inserted into the pin terminal insertion hole 2b of the internal holder 2 using, for example, an insertion jig, The wire contacts 3 are brought into contact with each other by being inserted through the cylindrical contacts 3b of the wire terminals 3, and the wire terminals 3 are brought into conduction.

  Further, when the waterproof member 6 is inserted into the opening 1c for waterproofing, the locking protrusion 2g of the internal holder 2 is fitted into the locking hole 6b of the waterproof member 6, and the waterproof member 6 is prevented from falling off, and the corrugated portion 6a. Thus, water does not enter the outer holder 1. In order to further ensure the closing by the waterproof member 6, a plate made of synthetic resin can be fitted over the waterproof member 6 of the opening 1c. FIG. 7 is a side view in which only the outer holder 1 in the same state as FIG.

  In the embodiment having such a configuration, the entry of water is prevented inside the external holder 1 by the seal member 7 and the waterproof member 6 attached to the electric wire 4, and the harness connection body can have a waterproof structure. . If the wire terminal insertion port 1a into which the wire terminal 3 is not inserted is sealed with a blind plug made of synthetic rubber or the like, water does not enter the inside. Note that the waterproof structure may not be provided, and in this case, the sealing member 7 is not used, and a plate made of synthetic resin may be fitted into the opening 1c instead of the waterproof member 6.

  FIG. 8 shows a perspective view of a jig T that pushes up the operation piece 2f of the inner holder 2. The jig T has two ends Ta and Tb, and the operation piece 2f is moved back and forth by the upper and lower movable holding plates 2c. Since they are displaced, it is possible to simultaneously push up these two movable holding plates 2c by operating these operation pieces 2f with the jig T at the same time.

  FIG. 9 is an explanatory diagram of the operation of the jig T with respect to the inner holder 2, and the illustration of the outer holder 1 and the wire terminal 3 is omitted. In order to remove the wire terminal 3, the operation piece 2 f of the movable holding plate 2 c is pushed up by inserting the jig T from the groove 2 e of the internal holder 2. That is, in order to remove the wire terminal 3 from the assembly for circuit recombination or the like, it is necessary to remove the waterproof member 6 and then remove the pin terminal 5 and remove the wire terminal 3 from the internal holder 2.

  The ends Ta and Tb of the jig T are inserted into the groove 2e from below through the opening 1c, and the upper and lower movable holding plates 2c are simultaneously pushed up through the operation piece 2f as shown on the left side of FIG. By this push-up, the locking claw 2d is removed from the locking hole 3c of the electric wire terminal 3, and the electric wire 4 can be pulled to simultaneously pull out the two electric wire terminals 3 to the outside. The remaining two wire terminals 3 may be similarly drawn by inserting the jig T into the groove 2e on the other side.

  In the embodiment, the latching claw 2d is provided on the movable holding plate 2c and the latching hole 3c is provided on the electric wire terminal 3. However, these are reversed, the concave portion is provided on the movable holding plate 2c, and the convex portion is provided on the electric wire terminal 3. May be provided. In addition, a total of four wire terminal insertion openings 1a are provided in the external holder 1 and the four wire terminals 3 are inserted. However, a circuit can be designed by providing a larger or smaller number of wire terminal insertion openings 1a.

It is a disassembled perspective view of the harness connection body of an Example. It is sectional drawing of an internal holder. It is a perspective view of the modification of an electric wire terminal. It is sectional drawing of a pin terminal. It is sectional drawing of the harness connection body at the time of an assembly. It is sectional drawing of the harness connection body after an assembly. It is a side view of the harness connection body which made the external holder only a cross section. It is a perspective view of a jig. It is operation explanatory drawing of the jig | tool for removing an electric wire terminal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 External holder 1a Electric wire terminal insertion port 1b Space part 1c Opening part 2 Internal holder 2a Electric wire terminal holding hole 2b Pin terminal insertion hole 2c Movable holding plate 2d Locking claw 2e Groove part 2f Operation piece 2h Rib 3 Electric wire terminal 3a Connection part 3b Tube Contact 3c locking hole 3d conductor crimping part 3e covering crimping part 4 electric wire 5 pin terminal 6 waterproofing member 7 sealing member

Claims (5)

An external holder having a plurality of wire terminal insertion openings, is inserted from an inlet portion provided in the outer holder used within the external holder, together with the wire terminal insertion opening and communicating with the wire terminal holding holes, these An internal holder having a pin terminal insertion hole intersecting with an electric wire terminal holding hole, a connecting portion at one end and a locking portion for positioning at an intermediate portion, and further connecting an electric wire to the other end a wire terminal to be inserted into wire terminal holding hole of the inner holder through the wire terminal insertion openings, said inside the inner holder by inserting the inlet portion of the outer holder to the pin terminal insertion hole of said inner holder It consists of a pin terminal that contacts the contact of the connecting portion of the electric wire terminal and electrically connects the electric wire terminals, and is provided with a movable holding plate that holds the electric wire terminal in the electric wire terminal holding hole of the inner holder, Harness connector using a connecting member, characterized in that a locking portion that engages with the locking portion of the wire terminal to the holding plate. The operation piece protrudes to the side of the holding plate of the inner holder, the holding plate is moved via the operation piece, and the locking portion of the holding plate is detached from the locking portion of the wire terminal. A harness connector using the connection member according to Item 1 . The harness connecting body using the connection member according to claim 1 or 2 , wherein the engaging portion provided in the electric wire terminal is a concave portion, and the engaging portion provided in the internal holder is a convex portion. Inserting the sealing member to the electric wire and a waterproof structure between the wire terminal insertion opening and said electric wire of said outer holder, any one of the preceding claims, characterized in that the inlet was closed by the waterproof member A harness connection body using the connection member according to claim 1 . Automobile harness circuit, characterized in that using a harness connector using the connection member according to claim 1.

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