JPH0737246Y2 - connector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a connector used for internal wiring of an automobile.

[Conventional technology]

Conventionally, with the lance the terminal metal fitting inserted in the terminal storage chamber,
As shown in FIG. 5, the connector housing that is double-locked with the locking body attached to the rear end of the terminal housing is a connector housing.
After locking the terminal metal fitting 23 to the lance (not shown) provided in the terminal storage chamber 21 of 20 so as to move up and down, the locking is performed by forming the wire insertion groove hole 22a at the rear end of the terminal storage chamber 21. The body 22 was attached and the terminal fitting 23 was double-locked.

In the connector configured as described above, the terminal fitting 23 inserted in the terminal housing chamber 21 is double-locked by the lance and the locking body 22, and the terminal fitting 23 is provided in the terminal housing chamber 21. If not completely housed, the locking body 22 cannot be attached to the rear end of the terminal housing chamber 21, so the function of detecting incomplete insertion of the terminal fitting 23 and the terminal fitting inside the terminal housing chamber 21 can be detected. When 23 is inserted in a slightly incomplete state, the locking body 22 is forcibly attached to the rear end of the terminal storage chamber 21, and the terminal fitting 23 is held in the terminal storage chamber 21 by the locking body 22. It has the function of pushing into.

[Problems to be solved by the invention] However, the terminal metal fitting 23 inserted in the terminal storage chamber 21 in a somewhat incomplete state is locked at the rear end of the terminal storage chamber 21.
22 is forcibly attached, and the terminal housing chamber 21 is
Regarding the function of completely inserting into the inside, since there is almost no difference between the outer diameter of the insulation level 23a and the hole diameter of the wire insertion groove hole 22a formed in the locking body 22, the outer diameter of the insulation barrel 23a is small. Since there is almost no difference between the diameter of the wire insertion groove hole 22a and the hole diameter of the wire insertion groove hole 22a formed in the locking body 22, the opening portion of the wire insertion groove hole 22a is expanded by the insulating barrel 23a and the terminal metal fitting 23 is opened. It cannot be pushed into the terminal storage chamber 21. When the locking body 22 is attached to the rear end portion of the terminal housing chamber 21 in this state, a mechanical external force such as a pulling force acts on the electric wire crimp-connected to the terminal fitting 23, so that the terminal fitting chamber 23 moves to the terminal fitting 23. There was a problem such as being pulled out.

As a means for solving the above-mentioned problems, the locking body 2 is attached to the end surface of the insulation level 23a by swaging the insulation level 23a in an elliptical shape or the like.
It is easily conceivable to completely abut the hole edge of the wire insertion groove hole 22a of 2, but in order to caulk the insulation level 23a in the existing terminal fitting 23 to an elliptical shape, a special caulking tool is used. There are problems such as need.

In addition, as shown in FIG. 6, the diameter of the wire insertion groove hole 22a formed in the locking body 22 is reduced so that the edge of the wire insertion groove hole 22a of the locking body 22 is completely formed on the end surface of the insulating barrel 23a. It is also possible to make contact with the wire insertion groove hole 22a, but if the diameter of the wire insertion groove hole 22a is reduced, the wire coating is compressed by the wire insertion groove hole 22a, and the wire coating deforms due to the temperature rise during energization, and the coating of the compressed part May become thin, and the coating may be broken by friction with the wire insertion groove hole 22a due to vibration or the like, causing an electrical accident such as a short circuit accident.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a connector that can maximize the double locking function without applying excessive compression to the wire coating.

[Means for Solving the Problems]

In order to solve the above problems, the present invention provides a connector in which a lance inserted into a terminal housing chamber and a locking body attached to the rear end of the terminal housing chamber are double locked.
A connector is formed by continuously connecting an electric wire insertion groove hole having a diameter smaller than the electric wire outer diameter and an electric wire insertion groove hole having a diameter larger than the electric wire outer diameter to the locking body.

[Action]

The locking body in which the wire insertion groove hole having a diameter smaller than the wire outer diameter and the wire insertion groove hole having a diameter larger than the wire outer diameter are connected to each other forms a terminal fitting by the locking body and a lance provided in the terminal housing chamber. In addition to being heavily locked, it has a function of detecting whether or not the terminal fitting is completely inserted into the terminal accommodating chamber. That is, when the terminal fitting is not completely inserted into the terminal housing chamber, even if the locking body is attached to the rear end of the terminal housing chamber, the locking body abuts the terminal fitting and cannot be mounted.

If the terminal fitting is inserted in the terminal storage chamber in a slightly incomplete state, forcibly attach the locking body to the rear end of the terminal storage chamber to insert a wire with a diameter smaller than the outer diameter of the wire. The insulating level end surface of the terminal fitting comes into contact with the hole edge of the slot, and acts to push the terminal fitting completely into the terminal housing chamber.

Furthermore, the electric wire insertion slot having a diameter smaller than the outer diameter of the electric wire and the electric wire insertion groove having a diameter larger than the outer diameter of the electric wire, which are connected to the locking body, act so as not to compress the electric wire coating more than necessary.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 2 is an X of FIG.
-A sectional view taken along the line X, in which 1 is a connector housing,
2 is a terminal housing chamber, 2 is a lance provided in the terminal housing chamber 2 so as to be movable up and down, 4 is a locking body attached to the rear end of the terminal housing chamber 2, and the locking body 4 has an electric wire. An electric wire insertion groove hole 4a having a diameter smaller than the outer diameter and an electric wire insertion groove hole 4b having a diameter larger than the electric wire outer diameter are continuously provided.

The wire insertion groove hole 4b may be provided by forming the rear end portion of the wire insertion groove hole 4a in a tapered shape as shown in FIG. As shown in the figure, a larger diameter groove hole 4c is provided between the wire insertion groove hole 4a having a diameter smaller than the wire outer diameter and the wire insertion groove hole 4b having a diameter larger than the wire outer diameter, and the groove hole 4c is covered with the wire. It can be changed as appropriate, for example, as an escape.

Furthermore, the locking body 4 may be provided at the base end of the connector housing 1 so as to be openable and closable, or may be a separate body.

5 is a terminal fitting, and the lance 3 is provided on the bottom surface of the terminal fitting 5.
Is provided with a locking hole 5a for fitting and locking.

The terminal fitting 5 is installed in the terminal housing chamber 2 of the connector housing 1.
When inserted into the terminal housing chamber 2, the lance 3 provided vertically movable is once bent downward, and when the terminal fitting 5 is completely inserted into the terminal housing chamber 2, it is restored by the return spring force. It is fitted and locked in a locking hole 5a provided in the terminal fitting 5. Next, the locking body 4 is attached to the rear end of the terminal storage chamber 2, and the terminal fitting 5 is doubly locked by the locking body 4 and the lance 3.

If the terminal fitting 5 is not completely inserted into the terminal housing chamber 2, the locking body 4 cannot be attached to the rear end of the terminal housing chamber 2 and the terminal fitting 5 is incomplete. Insert is detected.

Further, when the terminal fitting 5 is inserted in the terminal storage chamber 2 in a somewhat incomplete state, the locking body 4 is forcibly attached to the rear end portion of the terminal storage chamber 2 to lock the terminal fitting 5. The hole edge of the wire insertion groove hole 4a provided in the body 4 is the insulation level of the terminal fitting 5.
Abutting on the end face of 5b, the terminal fitting 5 is pushed into the terminal housing chamber 2 and double-locked by the locking body 4 and the lance 3 provided in the terminal housing chamber 2 so as to be vertically movable.

Furthermore, since the electric wire insertion groove hole 4a having a diameter smaller than the electric wire outer diameter and the electric wire insertion groove hole 4b having a diameter larger than the electric wire outer diameter are continuously provided in the locking body 4, at least outside the outer shape line of the connector housing. The wire covering crimp-connected to the terminal fitting 5 will not be compressed more than necessary, and there is no risk that the wire covering will be deformed due to temperature rise during energization and the covering will be damaged by friction with the wire insertion groove hole 4a.

Although a single-core female connector has been illustrated and described above, the present invention is not limited to this, and can be applied to a multi-core connector as well as a male connector.

[Effect of device]

According to the present invention, as described above, the outer shape of the connector housing is provided by connecting the wire insertion groove hole 4a having a diameter smaller than the outer diameter of the wire and the wire insertion groove hole 4b having a diameter larger than the outer diameter of the wire to the locking body 4 as described above. There is an excellent advantage that it is possible to provide a connector that can maximize the double locking function without compressing the wire coating more than necessary at least outside the wire.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line XX of FIG. 1, and FIGS. 3 and 4 are main parts showing another embodiment of the present invention. FIG. 5 and FIG. 6 are explanatory views showing a conventional connector. 1: Connector housing, 2: Terminal housing chamber 3: Lance, 4: Locking body 4a: Wire insertion slot, 4b: Wire insertion slot 5: Terminal fitting

Claims (1)

[Scope of utility model registration request] 1. A connector for double-locking a terminal fitting inserted in a terminal housing chamber with a lance and a locking body attached to the rear end of the terminal housing chamber, wherein A connector characterized in that a small-diameter wire insertion slot and a wire insertion slot having a diameter larger than the outer diameter of the wire are provided in series.