JPS5824387Y2 - electrical connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to improvements in connectors that are used, for example, in automobile wiring.

This type of connector is used by attaching a metal electrical connector to a synthetic resin connector housing. A locking hole is provided in a part of the electrical connector, and when it is inserted into the connector housing, the connector is accommodated. It has a structure in which a locking protrusion provided in the chamber engages with the locking hole to prevent the electrical connector from being pulled out.

However, since the locking hole is formed by pressing, punching, etc., a sharp corner remains at its front edge.

Therefore, if the connector housing is repeatedly attached and detached, or if excessive force is applied when mating, the synthetic resin locking protrusion that collides with the sharp corner will crack and eventually break. There was a risk that it would end.

As connectors become multipolar and electrical connectors and their housing chambers become smaller, the locking protrusions also become smaller pieces, but the electrical connectors themselves are made of a metal plate of a certain thickness, so
This has the drawback that the risk of the locking protrusion being broken tends to increase, and as a result, the electrical connection state becomes unstable.

This idea was developed with the above-mentioned points in mind, and involves providing a retaining portion for the front surface of the locking protrusion of the flexible locking piece made of synthetic resin at the front edge of the locking hole of the metal electrical connector. This expands the contact surface with the locking protrusion to soften the impact force when the connector or connector housing is fitted, thereby preventing the locking protrusion from breaking and creating a connector that can maintain a stable electrical connection at all times. is intended to provide.

Next, an example will be described.

A is a male electrical connector, and there is a wire connection part A1 at the rear.
It has an electrical contact part A2 at the front part, and the wire connection part A1 is provided with crimp clamp parts 1 and 2 for the insulation coating of the wire and the conductor, respectively.

Further, the electrical contact portion A2 is folded back to the substrate portion 3 and the overlapping plate portion 4
. The bulging portions 3 a and 4 a are formed, a cavity 5 is formed inside, and a locking hole 6 is provided in the bulging base plate 3 facing the cavity 5 by press punching or the like. Tear down.

The above is the same as the conventional one, but in this invention, an improvement is made in the retaining portion 7 for the locking protrusion 9 of the flexible locking piece 8 provided in the connector housing chamber at the front end edge of the locking hole 6. It has been subjected.

That is, in the locking protrusion 9 of the flexible locking piece 8, the engaging surface 9a facing the retaining portion 7 is provided obliquely and backwardly, and the flexible locking surface 9a in front of the locking protrusion 9 The upper surface 9b of the piece 8 is provided to descend forward in an oblique manner, and therefore the retaining portion 7 at the front end edge of the locking hole 9 is also slightly deformed inward to form the oblique retaining portion. It has a cut end surface 7c corresponding to the surface 9a and a slanted bottom surface 7d corresponding to the slanted top surface 9b, so that when the electrical connector is inserted into the connector housing, the locking protrusion 9 portion and the electrical The engaging portion 7 portion of the connector contacts the entire surface.

When an external force (arrow line F) parallel to the electrical contact portion A2 is applied, this is divided into two components: a component force parallel to the inclined surface 9a of the locking protrusion 9 and a component force perpendicular to the slope surface 9a of the locking protrusion 9. The impact against the stop projection 9 is alleviated.

FIG. 5 is an explanatory diagram of the state in which the conventional electric connector B is used. Since the locking hole 6 is simply formed by pressing, punching, etc., the front edge has sharp corners 6a, 6a. remain.

Therefore, the front surface of the locking protrusion 9 of the flexible locking piece 8 has a sharp corner 6.
There is a risk that cracks C may occur due to local contact between a and 6 a, and repeated attachment and detachment of the connector housing, resulting in breakage of the locking protrusion.

Fig. 6 shows an embodiment of this invention, in which the groove-shaped sliding engagement portion 7 has a V-shaped cross section 7a (Fig. 6 A) and a U-shape 7b (Fig. 6 Opening). However, this can take various shapes corresponding to the inclined surface 9a of the locking projection 9.

FIG. 7 shows another embodiment of this invention, in which the small piece 10 protruding from the front edge of the locking hole 6 is bent toward the empty chamber 5, and A notch 11.11 is provided on the front edge of the stop hole 6, and a small piece 12 is cut and raised to serve as an engaging portion, compared to the case where it is formed in a groove shape as shown in FIGS. 3 and 6. , its production becomes easier.

Since the present invention is as described above, it has the following effects.

(b) When a backward tensile force is applied to the electrical connector, the tensile force is distributed and acts on the engagement surface of the locking protrusion on the flexible locking piece and the upper surface of the front part thereof. Therefore, the load on the locking projection portion can be reduced.

(b) The cut end surface of the engaging portion of the electrical connector engages the engaging surface of the locking protrusion that recedes diagonally inward, so that when a rearward tensile force is applied, both This acts to increase the degree of retention of the locking mechanism, thereby ensuring reliable locking.

(c) Manufacturing is easy because the retaining portion may be slightly deformed inward of the electrical connector.

[Brief explanation of the drawing]

The drawings show an embodiment of the connector according to this invention, and Fig. 1 is a plan view of the electrical connector, Fig. 2 is a side view of the same main part cut away at the center, and Fig. 3 is a diagram of the main part. Enlarged perspective view,
Fig. 4 is a sectional view of the main part of the connector, Fig. 5 is a sectional view of the main part of the conventional connector, and Fig. 6 is a sectional view of the main part of the connector.
Figures A and B are perspective views of essential parts showing an embodiment of the electrical connector in this invention. A1... Electric wire connection part, A2... Electric contact part, 3... Board part, 6... Locking hole,
7... Engagement part.

Claims (1)

[Scope of utility model registration request] A flexible lock connected to a synthetic resin connector housing, comprising an engagement surface that recedes obliquely to the rear with respect to the locking protrusion, and an upper surface that slopes downward obliquely to the front of the locking protrusion. A locking hole provided at the base of the electrical connector is provided with an engaging portion deformed inwardly at the front edge of the locking hole provided in the base portion of the electrical connector. A connector characterized in that a cut end surface of the retaining portion corresponds to the retaining surface, and a slanted bottom surface of the retaining portion corresponds to the upper surface.