JPH04141972A - Connector having inverse insertion preventing structure - Google Patents

Abstract

PURPOSE:To prevent inverse insertion of a terminal metal effectively without providing a large protruded matter such as a stabilizer at the terminal metal by providing a connector housing having a first flexible stopping member, and a terminal stopping means having a second flexible stopping member, and providing a stopping protrusion at a free end part of the second flexible member to be engaged with an inverse insertion preventing protrusion of the terminal metal. CONSTITUTION:A connector comprises a connector housing A having a first flexible stopping member 2 to a terminal metal C, and a terminal stopping means B having a second flexible stopping member 5 to the terminal metal C movable in two stages of temporary connection and primary connection to be connected with the connector housing A, and a free end part of the second stopping member 5 has a stopping protrusion 6a to be engaged with an inverse insertion preventing protrusion 11 of the terminal end part. The second flexible stopping member 5 presses the terminal metal C to a wall surface of a terminal containing chamber to let the forward end of the terminal metal C with a stopping step 3 formed in the wall surface. Need of preventing an inverse insertion of the terminal metal at an insertion hole of the terminal stopping means is thus prevented, and inverse insertion can be prevented at an inner part effectively.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a connector mainly used for connecting automotive wire harnesses, etc., and provides a structure for preventing reverse insertion of a terminal fitting into a terminal accommodating chamber of a connector housing. It is.

[Conventional technology]

In FIGS. 5 to 7, a is a connector housing;
b is a terminal locking tool, and C is a terminal metal fitting.

A first flexible locking piece at for the terminal fitting C is provided in the terminal accommodating chamber a of the connector housing a, and a second flexible locking piece for the terminal fitting C is provided in the terminal locking device. A pair is provided.

The terminal locking tool is provided with a temporary locking piece b2 having a temporary locking protrusion b2' and a final locking piece b2 having a final locking protrusion b2', and a locking frame a of the connector housing a, A locking portion that engages with these projections bg' + b3' is provided inside.

The terminal fitting C consists of an electrical contact part C and a wire connection part C2, and the terminal housing chamber 1 is located at the bottom part C1 of the electrical contact part C1.
A pair of stabilizers 04 for regulating the insertion posture inside the terminal are protruded downward, and the main frame part b4 of the terminal locking device is
A passage guide protrusion having a smooth guiding surface bh', such as an arc, is formed in the insertion hole 6 portion corresponding to the bottom C8, and a passage permitting protrusion corresponding to the stabilizer 〇4 is formed on the side of the passage guide protrusion b6. A groove b7 is formed.

Then, in the temporary locking state where the temporary locking protrusion b2' is engaged with the locking part of the locking frame a3, the terminal fitting C is inserted into the terminal housing through the insertion hole b5 of the main frame part b4 of the terminal locking tool. When moving into the chamber a, the bottom portion C3 collides with the passage guide protrusion b6 and easily overcomes the protrusion via the smooth guide surface b6, and at the same time the stabilizer 〇 passes through the passage permitting groove portion 〇, It can be inserted into the terminal receiving chamber a.

If an attempt is made to reversely insert the terminal fitting C by mistake, the stabilizer c4 will abut against the upper frame portion of the main frame portion b4, preventing insertion.

In this case, as the wire connection portion 02 becomes larger, the insertion hole bS also becomes larger, so the protrusion height of the stabilizer c4 must be increased accordingly.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, the stabilizer provided on the terminal fitting largely protrudes to prevent the terminal fitting from being reversely inserted into the connector housing, but the stabilizer scratches the electric wire during assembly, etc. It has the disadvantage of being damaged.

The present invention focuses on the above-mentioned points, and is designed to achieve reverse insertion of a terminal fitting without providing a large protrusion such as a stabilizer on the terminal fitting.

[Means to solve the problem]

In order to achieve the above object, the present invention includes a connector housing having a first flexible locking piece for a terminal fitting in a terminal accommodating chamber, and a connector housing that is movably coupled to the connector housing in two stages: a temporarily coupled state and a fully coupled state. and a terminal locking tool having a second flexible locking piece for the terminal fitting, the free end of the second flexible locking piece being engaged with a reverse insertion prevention protrusion of the terminal fitting. Further, the second flexible locking piece presses the terminal fitting against the wall surface of the terminal receiving chamber so that the tip of the terminal fitting hits the locking step formed on the wall surface. It is characterized by matching.

〔Example〕

In Figures 1 and 2, A is a connector housing;
B is a terminal locking tool, and C is a terminal metal fitting.

The connector housing A is provided with a plurality of terminal accommodating chambers 1, and in each terminal accommodating chamber 1, one wall surface is provided with a first flexible locking piece 2 extending forward through a rising base 2a, A locking portion 2b that engages with the terminal fitting C is formed at the front end. A locking step portion 3 is formed on the other opposing wall surface.

The terminal locking tool B has an insertion hole 4a corresponding to the terminal accommodating chamber 1.
A second flexible locking piece 5 is provided extending forward in the main frame portion 4 formed with the main frame portion 4 . A bulging end portion 5b is formed in the flexible locking piece 5 via a tapered guide portion 5a.

A temporary locking piece 6 having a temporary locking protrusion 6a and a permanent locking piece 7 having a permanent locking protrusion 7a are provided on both sides of the main frame portion 4 of the terminal locking tool B. It engages with the locking part in the locking frame 8 that has been opened.

The terminal fitting C has an electric contact part C and an electric wire connection part C.

As is well known, the electrical contact portion CI is connected to the bottom plate portion 9 and provided with an elastic contact piece 10 via an arcuate folded portion 10a, and at the rear end of the bottom plate portion 9 is a protrusion 1 for preventing reverse insertion.
1 is cut out.

The terminal locking tool B is assembled to the connector housing A in a temporarily connected state 6 (Fig. 2), and in this state, the terminal fitting C, which has been connected to the electric wire 12 in advance, is inserted into the terminal through the insertion hole 4a of the main frame portion 4. When the terminal fitting C is inserted backwards when inserted into the housing chamber 1, as shown in the lower part of FIG. The contact portion C is pressed downward into the terminal accommodating chamber 1, and the front end 13 of the electrical contact portion C abuts against the locking step portion 3 to prevent reverse insertion.

During normal insertion, the electrical contact portion C passes over the locking step portion 3 and enters the terminal accommodating chamber 1 due to the arcuate folded portion 10a formed at the front end of the elastic contact piece 10.

If the locking step 3 is damaged due to some external force,
As shown in row J in FIG. Insertion is blocked.

At this time, the bulging end portion 51) of the flexible locking piece 5 in the terminal locking device B rides on the circumferential surface of the terminal fitting C and does not lock it, and is attached to the stepped portion 15 of the connector housing A. 7 to prevent the terminal locking tool B from moving to the fully connected state.

If the two-terminal fitting C is inserted correctly, the protrusion 1 for preventing reverse insertion.
1 enters into the groove 14 and locks the locking portion of the first flexible locking piece 2.
lb engages with the rear end of the electrical contact portion C3 to prevent the terminal fitting C from coming off backwards, and in this state, when the terminal locking device B is pushed to shift to the main connection state, the second flexible locking piece bulged end 5 of 5
b engages with the rear end of the wire connection part C2 and doubles the terminal fitting C.
(Figure 3).

In the embodiment shown in FIG. 4, a locking protrusion 5a' is formed at the tip of the second flexible locking piece 5 of the terminal locking tool B', as shown in the lower part of FIG. The protrusion 11 for preventing reverse insertion, which is bulged in the electrical contact portion CI of the terminal fitting C that has been inserted in the reverse direction, engages with the locking protrusion 5a/1~, thereby preventing further insertion.

Second, the terminal fitting C is prevented from being reversely inserted by the locking step portion 3, as in the previous embodiment, and thirdly, by the rising base portion 2a, reverse insertion is prevented.

〔Effect of the invention〕

As described above, the present invention includes a connector housing having a tenth flexible locking piece for a terminal fitting in a terminal accommodating chamber, and a connector housing that is movably coupled to the connector housing in two stages, a temporary coupled state and a fully coupled state. a terminal locking tool having a second flexible locking piece opposite to the terminal fitting G, and a free end of the second flexible locking piece engages with a reverse insertion prevention protrusion of the terminal fitting. A locking protrusion is provided, and the second flexible locking piece presses the terminal fitting against the wall surface of the terminal accommodating chamber so that the tip of the terminal fitting collides with a locking step formed on the wall surface. Therefore, there is no need to prevent reverse insertion of the terminal fitting in the insertion hole portion of the terminal locking tool, and reverse insertion can be effectively prevented inside.

[Brief explanation of drawings]

Fig. 1 is a perspective view of one embodiment of the present invention, Fig. 2 is a cross-sectional view of the same temporarily connected state, Fig. 3 is a cross-sectional view of the above fully connected state, and Fig. 4 is a cross-sectional view of another embodiment. 5 is a perspective view of the conventional example, FIG. 6 is a rear view of the connector housing same as the above, and FIG. 7 is a rear view of the terminal locking tool same as the above. A... Connector housing, B... Terminal locking tool, C
...Terminal fitting, 2...First flexible locking piece, 2a...
- Base, 3... Locking step, 5... Second flexible locking piece, S, /,... Locking protrusion. Patent applicant: Yazaki Sogyo Co., Ltd. No. 1 Procedural amendment (voluntary) January 31, 1991 Toshi Toshi Uematsu, Commissioner of the Demand Agency 2゜3゜4゜ Display of the case 1990 patent application No. 260629 Reverse insertion of the name of the invention Relationship with the case of a person who corrects a connector with a preventive structure Patent applicant address 1-4-28 Mita, Minato-ku, Tokyo Name (689) Yazaki Sogyo Co., Ltd.

Claims (3)

[Claims] (1) A connector housing having a first flexible locking piece for the terminal fitting in the terminal accommodating chamber, and a connector housing that is movably connected to the connector housing in two stages, a temporary connected state and a fully connected state, and a first flexible locking piece for the terminal fitting. a terminal locking tool having a second flexible locking piece, and a locking protrusion that engages with a reverse insertion prevention protrusion of the terminal fitting is provided at the free end of the second flexible locking piece. A connector having a reverse insertion prevention structure. (2) A connector housing having a first flexible locking piece for the terminal fitting in the terminal accommodating chamber, and a connector housing that is movably connected to the connector housing in two stages, a temporary connected state and a fully connected state, and a first flexible locking piece for the terminal fitting. and a terminal locking tool having two flexible locking pieces, the second flexible locking piece presses the terminal fitting against the wall surface of the terminal housing chamber, and the tip of the terminal fitting is pressed against the wall surface of the terminal housing chamber. A connector having a reverse insertion prevention structure characterized by abutting against a formed locking step. (3) A connector housing having a first flexible locking piece for the terminal fitting in the terminal accommodating chamber, and a connector housing that is movably connected to the connector housing in two stages, a temporary connected state and a fully connected state, and a first flexible locking piece for the terminal fitting. and a terminal locking tool having two flexible locking pieces, the reverse insertion prevention protrusion of the terminal metal fitting abuts the base of the first flexible locking piece, and in this state, the second flexible locking piece A connector having a reverse insertion prevention structure, characterized in that a locking piece does not lock the terminal fitting.