JPH0357026Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a connector housing used for connecting electrical wiring.

[Prior Art] Conventionally, as a measure to prevent the connecting terminals of this type of connector from coming off, a flexible locking lever member for locking the connecting terminals is provided in a synthetic resin housing, and this locking lever member is provided inside the housing made of synthetic resin. For example, a system in which the free end of the locking lever member is pushed into the locking hole of the connection terminal by a separate annular pushing member is disclosed in Japanese Patent Application Laid-open No.
It is disclosed in Publication No. 60-249272.

[Problems to be solved by the invention] This method has the excellent advantage of being able to securely hold the connection terminals with the push-in member, but as connectors become smaller, the push-in member If the wall thickness must be reduced, the following problems arise. That is, by making the annular pushing member thinner, the pushing force of the pushing member becomes weaker than the reaction force of the locking lever member, and when the pushing member 1 is fitted into the housing 2 as shown in FIG. The locking lever member inside the housing 2 cannot be pushed in completely,
The pushing member 1 is distorted into a slightly swollen state,
As a result, there is a problem in that the terminal holding force by the locking lever member is considerably reduced, and the deformation of the pushing member 1 makes it difficult to fit it into the mating housing.

[Purpose of the invention] The purpose of the invention is to improve the problems of the conventional example by making it possible to fit the pushing member in a normal state without distortion even if the wall thickness of the pushing member is reduced. An object of the present invention is to provide a connector housing which can provide a reliable terminal holding force.

[Summary of the invention] The gist of the invention to achieve the above objectives is as follows:
By fitting the pushing member into the housing, the free end of the locking lever member provided integrally with the housing is pushed into the locking hole of the connection terminal housed in the housing, and the connection terminal is inserted into the housing. In the connector housing of a type that locks the housing, the push-in member is provided with a rib-shaped guide having a large upper end, and the guide is fitted along a guide groove provided on the housing side. It is.

[Embodiments of the invention] The invention will be explained in detail based on the embodiments shown in FIGS. 1 to 5.

FIG. 1 is a front view showing an embodiment of the connector according to the present invention, FIG. 2 is a longitudinal sectional view thereof, and FIG. 3 is an enlarged sectional view of a part thereof. An appropriate number of, for example, six female connection terminals 3 are inserted into the respective insertion holes inside the housing 2, which is molded from a synthetic resin having electrical insulation properties, and a conventional retaining member 4 is inserted at a predetermined position. It is fixed by. Furthermore,
In order to ensure the terminal holding force, a locking hole 3b is provided in the bottom 3a of each connection terminal 3, and the housing 2
As shown by the dotted line in FIG. 3, a flexible locking lever member 5 is provided for each connection terminal 3 on the side. This locking lever member 5 is integrated with the housing 2, its base is connected to the front end of the housing 2, and its rear end is a free end 5a. This free end 5a has a locking hole 3b for the connecting terminal 3.
A locking pawl 5b that fits into is provided. The connection terminals 3 are arranged, for example, vertically symmetrically, and the locking lever members 5 are locked by being moved inward by push-in members 1, each of which is a separate member. The pushing member 1 has an annular cross section as shown in Fig. 1, and an appropriate number of rail-shaped guides 1a with enlarged ends are integrated inside the pushing member 1, as shown in an enlarged view in Fig. 4. There are multiple locations,
It is adapted to be fitted along a guide groove 2a provided on the housing 2 side. Note that 7 is a metal lever for locking with the mating housing, and 8 is a lever for releasing the metal lever, which is molded integrally with the housing 2.

When the connection terminal 3 remains inserted into the insertion hole from the rear of the housing 2, the locking lever member 5
is in the state shown by the dotted line in FIG. 5b into the locking hole 3b of the connection terminal 3, locking is achieved. That is, the pushing member 1 is pushed in from the front end of the housing 2, and the protrusion 1b having the inclined surface at the tip
When the free end 5a of the locking lever member 5 is pushed inward and the pushing member 1 reaches a predetermined position, the locking claw 5b of the locking lever member 5 is fitted into the locking hole 3b of the connecting terminal 3. become.

By doing this, even if an excessive force is applied to the connecting terminal 3 through the connecting terminal housed in the mating housing when the housings are fitted together, the connecting terminal 3 is held by the locking lever member 5. It is firmly fixed and will not come out of the housing 2. To release this lock, all you have to do is pull out the pusher member 1, but since no pulling force acts on this pusher member 1 during normal use, there is no possibility that the lock will come off accidentally. Unthinkable.

In this embodiment, the rail-shaped guide 1a provided on the pushing member 1 is connected to the guide groove 2 of the housing 2.
Since they are fitted in such a way that they cannot be pulled out from the housing 2, even if the thickness of the pushing member 1 is reduced, the pushing member 1 can still maintain its regular shape, precisely aligned with the periphery of the housing 2, as shown in Fig. 5. This allows the locking lever member 5 to securely hold the terminal.

The illustrated embodiment is a waterproof connector, and each electric wire 9 crimped to the connecting terminal 3
A waterproof rubber gasket 10 is fitted to prevent water from entering from the rear of the housing 2.
In addition, water intrusion from the connecting surfaces of the housings is dealt with by a separate rubber waterproof member 11, and in this case, the pushing member 1 also acts to prevent the waterproof member 11 from coming off. I am accomplishing it.

In the embodiment, the guide 1a has a rail shape, but it may have another shape that cannot be removed. Furthermore, although the conventional retaining member 4 is also used to secure the connecting terminal 3, it goes without saying that the purpose of retaining the connector terminal 3 can be achieved even without the use of the retaining member 4.

[Effect of the invention] As explained above, the connector housing according to the invention ensures the terminal holding force of the locking lever member by the pushing member, but in particular, the rib-shaped guide provided on the pushing member is attached to the housing. Since the connector is fitted along the guide groove of the housing, even if the wall thickness of the pushing member becomes thinner as connectors become smaller, the pushing member can be fitted into the housing in a normal state without distortion. As a result, the terminal holding force can be made more reliable, and the mating housing can be easily fitted.

[Brief explanation of the drawing]

Drawings 1 to 5 show an embodiment of the connector housing according to the present invention, in which Fig. 1 is a front view of the connector housing, Fig. 2 is a longitudinal sectional view thereof, and Fig. 3 is an enlarged sectional view of a part thereof. 4 are enlarged sectional views of essential parts, FIG. 5 is an explanatory diagram of the operation, and FIG. 6 is an explanatory diagram of the operation of a conventional example. 1 is a pressing member, 1a is a guide, 2 is a housing, 2a is a guide groove, 3 is a connecting terminal, 3b is a locking hole, 5 is a locking lever member, 5a is a free end, 5b
is a locking claw.

Claims (1)

[Scope of utility model registration request] By fitting the push member into the housing,
In the connector housing of a type in which a free end of a locking lever member provided integrally with the housing is pushed into a locking hole of a connecting terminal housed in the housing to lock the connecting terminal in the housing, A connector housing characterized in that a rib-shaped guide with a large upper end is provided on the pushing member, and the guide is fitted along a guide groove provided on the housing side.