JPS5854790Y2 - connector housing - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a connector housing having a structure in which an electrical connector inserted into a terminal accommodating chamber is locked by a spacer inserted separately.

Fig. 1.2 shows a spacer locking type connector housing, which is the premise of the present invention.
The crimped electrical connector B was inserted, and the spacer A1 inserted into the connector housing A from the rear pressed the electric wire 2 and was located immediately behind the electric wire connection part B1, applying a pulling force to the electric wire 2. This prevents terminal B from being removed or removed in the event of an accident.

This spacer A1 has locking bodies 4 having curved wire holding grooves 4a on the lower end surface arranged in parallel in accordance with the number of terminal accommodating chambers 1 at the lower part of a rectangular plate-shaped spacer body 3, and at the upper part. Two locking protrusions 5 having tapered insertion guide surfaces 5a are provided at the front.

On the other hand, the connector housing A is connected to the terminal accommodating chamber 1 and provided with a spacer accommodating chamber 6 behind it, and the earthen wall of the spacer accommodating chamber 6 is separated at the center to form left and right flexible walls 7.
, 7 are configured to be elastically displaced up and down, and a locking hole 8 is opened in the front portion of the flexible wall 7, in which the locking projection 5 engages.

The spacer A1 is inserted into the spacer housing chamber 6 from the rear of the connector housing A. At this time, as shown in FIG. 3, the flexible wall 7 is displaced by the locking projection 5, and the locking projection 5 is engaged. When reaching the stop hole 8, it is restored to its original state and reaches the state shown in FIG.

A rising wall 10 that abuts the rear side surface of the flexible wall 7 is connected to the rear end of the spacer A1.

In the state shown in FIG. 4, when a pulling force is applied to the electric wire 2, a moment of M=P12 is generated on the flexible wall 7 via the spacer A1, and even if P is a relatively small force, the flexible wall 7 moves backward. There is a drawback that the spacer A1 is distorted and comes off from the connector housing A.

In order to prevent this, the width 11 of the locking protrusion 5 can be made longer, but in this case, the amount of displacement of the flexible wall 7 increases as shown by the imaginary line in FIG. A
1 becomes difficult to insert.

The present invention focuses on this point and is improved by increasing the size of the locking projection 5 11 without increasing the amount of displacement of the flexible wall 7.

FIG. 5 shows the spacer A2 according to the present invention, and FIG. 6 shows details of the locking protrusion 9 provided on the spacer A2.

The locking protrusion 9 has a tapered insertion guide surface 9a on the front side,
The locking protrusion 9, including the tapered insertion guide surface 9a, has a sideward tapered flank 9b toward the support base 7A of the cantilevered flexible wall 7.

Therefore, in the present invention, when the spacer A2 is inserted into the connector housing A, as shown in FIG. Therefore, the displacement amount 13 of the flexible wall 7 is the same, and in this state, the width of the locking protrusion 9 becomes 11'>11, and the width 12 can be shortened, so that the locking force is reduced. growing.

FIG. 8 shows another embodiment of the locking protrusion 9, in which the intermediate portion of the locking protrusion is cut out at the portion indicated by the imaginary line to form a notch 11a, with large and small separation protrusions 11b and 11.
The locking protrusion 11 made of C is shown.

In the locking projection 11, the large projection 11b must have a tapered insertion guide surface 11b1.

Since the present invention is hollow as described above, it has the advantage of increasing the locking force while maintaining the ease of inserting the spacer into the connector housing.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of the connector housing, Fig. 2 is a vertical sectional view of the same as above in use, Fig. 3 is an explanatory diagram showing the state when a spacer is inserted, and Fig. 4 is a perspective view of the main parts of the connector housing. 5 is a perspective view of the spacer according to the present invention, FIG. 6 is an enlarged perspective view of the locking protrusion in the spacer of the present invention, and FIG. 7 is an explanatory diagram showing the state of the spacer according to the present invention when inserted. , FIG. 8 is a perspective view showing another embodiment of the locking protrusion on the spacer. A...Connector housing, A1...
Spacer, 7... Flexible wall, 9... Locking protrusion, 9a... Tapered insertion guide surface, 9b...
...Tapered flank surface.

Claims (2)

[Scope of utility model registration request] (1) Consists of a connector housing equipped with a plurality of terminal accommodating chambers and a spacer that is inserted into the connector housing and locks an electrical connector, and the spacer has a locking projection for the cantilevered flexible wall of the connector housing. The locking projection has a tapered insertion guide surface facing forward and a tapered relief surface facing laterally toward the support base of the flexible wall. A connector housing characterized in that, when the wall is displaced, the tapered flank is located inside the flexible wall while following the displacement shape of the flexible wall. (2) The connector housing according to claim 1, which is a registered utility model, characterized in that the locking projection having a tapered insertion guide surface facing forward is constituted by large and small separation projections.