JP2007123015A - Joint connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable a joint connector used for an automobile harness circuit to be simple and reliable, and to facilitate the branch connection of an electric wire. <P>SOLUTION: A connection section 2a of a reception terminal 2 to which the electric wire 3 is connected is inserted into a terminal insertion hole 1c provided in a holding body 1, and the electric wire 3 is attached along a long groove 1b. In the pin insertion hole 1a, the center of a cylindrical contact 2c formed at the connection section 2a coincides with that of the pin insertion hole 1a. Then, when a pin terminal 4a of a through pin 4 is inserted into the pin insertion hole 1a provided in the center shaft of the holding body 1, the pin terminal 4a penetrates the cylindrical contact 2c in the connection section 2a of each reception terminal 2 and all reception terminals 2 are short-circuited by the pin terminal 4a, so that all electric wires 3 conduct electricity one another. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

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

  In a harness circuit, it is often necessary to branch a plurality of branch lines from a trunk line. Therefore, conventionally, a part of the main line is stripped, a spline joint method that branches the branch line by crimping the exposed conductor, and a circuit branch connector is arranged at the end of the main line. Two methods, a general connector and a joint connector method in which branching is performed using a crimp terminal, are frequently used.

  Since the latter joint connector method enables joint processing on the harness production line, the production efficiency is improved as compared with the former spline joint method. The spline joint method cannot change the circuit after completion of the harness, but the joint connector method has an advantage that correction after completion of the harness can be handled. In the joint connector system, since the crimp terminal is used, the electrical connection reliability equivalent to that of the general-purpose connector can be ensured.

  In the conventional spline joint method, it is necessary to move to a dedicated process once in the middle of the harness production line and perform joint processing, or once processing is performed, it is impossible to cope with circuit changes, so production efficiency is improved. In addition, there remains a problem in the reliability of electrical connection, such as the standard method of handling the insulation treatment by taping.

  However, even in the joint connector system, there is a problem that the amount of electric wire used increases due to an increase in the number of parts and an increase in circuit length. In addition, since the terminal crimping process is performed on the branch wire terminal in the early stage of harness manufacturing, it is not necessary to move to another process in the middle of the harness manufacturing line, and the production efficiency is good, but the connector and the mating general-purpose connector to be fitted, Since the number of parts such as bus bars and terminals increases, there is a problem in terms of cost.

  An object of the present invention is to solve the above-described problems and provide a joint connector that enables simple and reliable wire branching.

  The technical feature of the joint connector according to the present invention for achieving the above object is that a pin insertion hole is provided in the central axis of the columnar body, and one or a plurality of long grooves are provided on the surface along the longitudinal direction. A holding body provided with a terminal insertion hole communicating with the pin insertion hole at the bottom and a cylindrical contact at the front end, and the cylindrical contact is inserted into the terminal insertion hole so as to coincide with the axis of the pin insertion hole A receiving terminal having a connecting portion and an electric wire connected to the rear end, and a metal pin terminal that is inserted into the cylindrical contact of the receiving terminal by being inserted into the pin insertion hole and short-circuits the receiving terminals. To be.

  According to the joint connector of the present invention, by adopting a contact structure in which a pin terminal is press-fitted into a receiving terminal having a cylindrical contact, the structure is simplified and the reliability of electrical connection is improved. The number of parts is reduced as compared with, and the cost can be reduced.

  In addition, it has the same reliability and workability as a conventional joint connector, and requires the same wire length as the spline joint method.

The present invention will be described in detail based on the embodiments shown in the drawings.
In the joint connector of the present embodiment, mainly a holding body 1 having a pin insertion hole 1a, a long groove 1b, and a terminal insertion hole 1c shown in FIG. 1, a connecting portion 2a to be inserted into the terminal insertion hole 1c of the holding body 1, and an electric wire 3 includes a plurality of receiving terminals 2 having a crimping portion 2b connected to the pin 3, a pin terminal 4a, and a through pin 4 having a gripping portion 4b.

  The holding body 1 is made of a synthetic resin material. The cylindrical body is provided with pin insertion holes 1a for passing through the central axis of the holding body 1 and inserting pin terminals 4a. A long groove 1b having a substantially semicircular cross section is provided. Further, at the bottom of the long groove 1 b, one or a plurality of terminal insertion holes 1 c are formed for each long groove 1 b so as to communicate with the central pin insertion hole 1 a, and each terminal insertion hole 1 c is connected to the receiving terminal 2. The connection portion 2a is formed so that it can be inserted.

  The receiving terminal 2 is formed by punching one conductive metal plate. As shown in FIG. 2, the connecting portion 2a is provided with a cylindrical contact 2c drawn into a cylindrical shape at the front end, and a crimping portion is provided at the rear end. Although 2b is provided, this crimping | compression-bonding part 2b has shown the state which has not connected the electric wire 3. FIG. When the connecting portion 2a is inserted into the pin insertion hole 1a via the terminal insertion hole 1c, the central axis of the cylindrical contact 2c is made to coincide with the central axis of the pin insertion hole 1a.

  The tip edge 2d of the connecting portion 2a is semicircular, the centers of curvature of the tip edge 2d and the cylindrical contact 2c coincide, and the radius of the tip edge 2d is equal to the radius of the pin insertion hole 1a of the holder 1 It almost matches. The cylindrical contact 2c is provided with tapered guide portions 2e on both the front and rear sides so that the pin terminal 4a can be easily inserted from either side.

  In the through pin 4, a gripping portion 4b made of synthetic resin having electrical insulation is attached to an end portion of a metal pin terminal 4a. The pin terminal 4a is formed by bending a single conductive metal plate, for example, as shown in the cross-sectional view of FIG. 3, and has a substantially rectangular cross section.

  When assembling, the connecting portion 2a of the receiving terminal 2 to which the electric wire 3 is connected as shown by the arrow in FIG. 1 is inserted into the terminal insertion hole 1c of the holding body 1 as shown in FIG. Wear 3 Since the tip edge portion 2d of the connection portion 2a substantially matches the radius of the pin insertion hole 1a, the connection portion 2a is stably mounted in the pin insertion hole 1a as shown in FIG. The center coincides with the center of the pin insertion hole 1a. At this time, the inserted connecting portion 2a is locked by a locking portion (not shown) provided in the terminal insertion hole 1c so as not to drop off.

  In this state, when the pin terminal 4a is inserted into the pin insertion hole 1a while holding the grip portion 4b of the through pin 4, the pin terminal 4a penetrates the cylindrical contact 2c of the connection portion 2a of each receiving terminal 2, and all receiving portions are received. Since the terminal 2 is short-circuited by the pin terminal 4a, all the electric wires 3 are electrically connected to each other.

  Further, the pin terminal 4a of the through pin 4 may be inserted into the pin insertion hole 1a from any side of the holding body 1. At this time, since the cross section of the pin terminal 4a is substantially square, the substantially square corner of the pin terminal 4a is in contact with the inner wall of the cylindrical contact 2c, so that good electrical contact characteristics can be obtained.

  The joint connector is secured to the outside by taping from the outside or attaching an insulating cylinder to such an assembly.

  Thus, since this joint connector performs terminal connection using the through pins 4, it is possible to make the receiving terminal 2 small, and the external appearance after assembly becomes a cylindrical shape, which can be easily incorporated into the harness body. Become. Further, since the terminals are arranged around the through pins 4, interference between the electric wires 3 can be eliminated as compared with the spring contact structure product.

  In addition, in the Example, although the holding body 1 demonstrated as a column shape, even if it is a polygonal column shape, an elliptical shape may be sufficient. Moreover, although the four long grooves 1b were provided in the holding body 1, this long groove 1b is not restricted to four pieces.

  In the long groove 1b of the holding body 1, in order to stably support the receiving terminal 2 as shown in FIG. 6, a protrusion 1d adapted to the shape of the crimping portion 2b of the receiving terminal 2 can be formed. Further, as shown in FIG. 6, the terminal insertion hole 1c in the long groove 1b can also be shaped so that the connection portion 2a can be inserted in any direction. Furthermore, you may attach | subject the arrow and mark which show the insertion direction of the through pin 4, and the arrangement direction of the electric wire 3 in the surface of the holding body 1 of the receiving terminal 2, and the long groove 1b.

  Also for the through pin 4, the pin terminal 4 a can be made to have a good contact property with the receiving terminal 2 by processing a metal rod into a substantially square cross section or by twisting it as shown in FIG. 7, for example. Further, there is no problem even if the pin terminal 4a has a circular cross-sectional shape.

  Also, the two through pins 4 can be inserted from both sides of the pin insertion hole 1a. In this case, if the length is such that the two pin terminals 4a do not contact at the center, the one through pin 4 The short circuit of the receiving terminal 2 and the short circuit of the receiving terminal 2 by the other through pin 4 can be made into separate circuits.

  Further, the pin insertion hole 1a is not necessarily a through hole but may be a dead end hole.

It is a disassembled perspective view. It is a perspective view of a receiving terminal. It is sectional drawing of a pin terminal. It is a perspective view of an assembly. It is sectional drawing of the state which inserted the receiving terminal in the holding body. It is a perspective view in the state where a projection was formed in a long groove of a holding body. It is a perspective view of the modification of a through pin.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Holding body 1a Pin insertion hole 1b Long groove 1c Terminal insertion hole 1d Protrusion 2 Receiving terminal 2a Connection part 2b Crimp part 2c Cylindrical contact 2d Tip edge part 2e Guide part 3 Electric wire 4 Through pin 4a Pin terminal 4b Holding part

Claims (6)

  A holding body provided with a pin insertion hole in the central axis of the columnar body, a single or a plurality of long grooves along the longitudinal direction on the surface, and a terminal insertion hole communicating with the pin insertion hole at the bottom of the long groove, and a front end A receiving terminal having a connecting portion for inserting the cylindrical contact into the terminal insertion hole so as to coincide with the axis of the pin insertion hole, and having a wire connected to the rear end thereof, and the pin insertion A joint connector comprising: a metal pin terminal that is inserted into a cylindrical contact of the receiving terminal by being inserted into a hole and short-circuits the receiving terminals.   2. The joint connector according to claim 1, wherein the long groove has a substantially semicircular cross section to accommodate an electric wire.   The joint connector according to claim 1, wherein a projection that supports the receiving terminal is provided in the long groove.   The joint connector according to claim 1, wherein the pin terminal has a substantially square cross section.   The joint connector according to claim 1, wherein a grip portion having electrical insulation is attached to the pin terminal.   The joint connector according to claim 1, wherein the receiving terminal is connected to the electric wire by a crimping method.

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