JPS6323893Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a joint used to connect the terminal of a branch line drawn out from a main line and a large number of electric wires to be connected to the terminal of the branch line, in a branch circuit of a wire harness of an automobile, for example. This relates to improvements to intra-connectors.

In the known joint connector, the end of a connecting wire 3 with a female terminal (not shown) crimped thereon is inserted from below the housing 1, as shown in FIGS. 1 and 2, and the joint terminal 2 is inserted from above. A structure in which the male and female contact portions of these terminals fit together to form a branch circuit is often used. And joint terminal 2
has a plate-shaped male contact portion 5 with both ends of a plate-shaped substrate 4 bent and facing each other, and its tip divided into multiple branches, for example, for 8 poles as shown in Figure 2A, and for 3 poles as shown in Figure 2B. (hereinafter referred to as 8P and 3P) are formed according to the number of equal poles, and any one of them is selected, (8P+6
P) (8P+3P+3P) or (4P+4P+
3P+3P), etc. In order to protect the inserted joint terminal 2, the case body 6, which is open only at the bottom, is covered with the housing 1 as shown by the arrow in the figure. The case body 6 is locked to the housing 1 by engagement between a locking protrusion 7 on the side surface of the housing 1 and a locking hole 8 provided on the side surface of the case body 6 so that the case body 6 does not come off during use.

Since the above-described known joint connector has a structure in which the case body 6 is covered and locked and the joint terminal 2 is enclosed, there is a drawback that it is difficult to confirm the insertion of the joint terminal 2 after the joint connector is molded. Therefore, when the joint connector is brought into conduction, there are problems such as incorrect insertion (insertion of a different item) or incorrect combination.

The present invention aims to solve the above conventional problems, and has a detection mechanism consisting of a detection hole drilled in the board 4 of the joint terminal 2 and a detection pin provided inside the head of the case body. The detection holes are characterized by a unique arrangement structure for each type of joint terminal. According to the joint connector of the present invention, incorrect insertion of the joint terminal can be accurately detected when the case body is covered.

Embodiments will be described in detail below with reference to drawings. First, Fig. 3 shows the joint terminals 2 used in the joint connector of the present invention. 2A shown in the figure is for 8P, 2B is for 6P, and 2C is for 4P. Both ends of the board 4 are bent. It has a large number of contact parts 5 which are opposed to each other and whose tips are divided into multi-branched parts,
Each substrate 4 is provided with detection holes 9 in a unique arrangement for each type according to the number of poles described above. That is, for 4P of 2C shown in the figure, there is one in the center, for 6P of 2B there are two with a spacing of L ₁ , and for 8P of 2A there is one in the center.
Two detection holes 9 with _L2 are provided through the hole.

On the other hand, the case body 6 of the joint connector of the present invention is a resin box having an opening 10 at the bottom and a head 11 at the top, as shown in FIG. A detection pin 12 that loosely fits into the detection hole 9 is protruded from the inside of the head 11. That is, when the case body 6 is fully covered with the casing 1, the detection pin 12 is located at the head 1 which is in contact with the board 4 of the joint terminal 2 inserted into the upper surface of the casing 1.
It protrudes from the inside of 1 with a slight height,
It fits into the detection hole 9 of the correctly inserted joint terminal 2, forming a detection mechanism that detects its normality. Therefore, the position and arrangement of the detection pins 12 are precisely determined in accordance with the specified arrangement of the joint terminal group of the casing 1 in which the case 6 is used.

The joint connector having the above detection mechanism is used as follows. That is, referring to FIG. 5 showing an embodiment of the present invention, the figure shows the (8P+) of the 8P joint terminal 2A and the 6P joint terminal 2B.
6P), and the distance L ₁ and
A joint terminal 2A2B having two detection holes 9 of _L2 is inserted into the upper surface of the casing 1. Inside the head 11 of the case body 6, there are provided a pair of detection pins 12 at intervals _L1 and _L2 corresponding to the groups of the detection holes 9. As in the conventional case, a female terminal (not shown) crimped onto the end of the connecting wire 3 is inserted into the casing 1 from below and fitted with the joint terminal to form a branch circuit.
Further, in the final position where the case body 6 is covered with the casing 1, the locking hole 8 on the side surface of the case body 6 and the locking protrusion 7 on the side surface of the casing 1 are engaged, and the casing 1
It has a structure that connects and locks.

When the above case body 6 is covered with the casing 1, if the joint terminals consisting of the combination of (8P+6P) are inserted in the correct combination without making a mistake, the detection pins 12 will be connected to each detection target. It fits smoothly into the hole 9, the case body 6 is correctly turned over to the final position, and the casing 1
The combination is locked. However, for the combination (8P+6P), (8P+3P+3P) or (4P)
If the detection pin 12 is inserted incorrectly with another combination such as P+4P+3P+3P), the detection pin 12 will interfere with the board 4 and the covering action of the case body 6 will be hindered, so the defect will be accurately detected and corrected immediately. I can do it.

In this way, the joint connector of the present invention is
Since defective joint terminal insertion is accurately detected when the case body is covered, it is possible to prevent the generation of defective connectors, eliminate conventional quality problems, and contribute to improved reliability.

[Brief explanation of the drawing]

Fig. 1: A perspective view showing the conventional structure of a joint connector, Fig. 2 A, B: A perspective view of a joint terminal used in a conventional joint connector, Fig. 3 A,
B, C: A perspective view showing a joint terminal used in the present invention, Fig. 4: A perspective view showing a cross section of a case body used in the present invention, Fig. 5: A perspective view showing an embodiment of the present invention Main symbols, 1 ...Casing, 2,2A~2C
... joint terminal, 3 ... electric wire, 4 ... board,
5...Contact part, 6...Case body, 9...Detection hole,
12...Detection pin.

Claims (1)

[Scope of utility model registration request] In a joint connector that covers a case body in a casing into which a joint terminal is inserted, a detection hole provided in the board of the joint terminal, and a detection hole provided inside the head of the case body corresponding to the detection hole. 1. A joint connector having a detection mechanism comprising pins, and having a structure in which the detection holes are arranged in a unique arrangement for each type of joint terminal.