JPS5917093Y2 - connector - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of a flexible locking arm that prevents a terminal fitting from coming off backwards in a connector, and makes it possible to easily release the terminal fitting and the flexible locking arm. .

The connector is constructed by inserting a terminal fitting into a connector housing, and the terminal fitting is removed in the front-rear direction by means as shown in FIG. 1.

That is, A is a connector housing, and a flexible locking arm 3 having a locking protrusion 2 is provided in a terminal accommodating chamber 1 formed inside the connector housing. When the terminal fitting B is inserted, the locking protrusion 2 fits into the locking hole 7 formed in the base plate 6 to prevent the terminal fitting B from coming off later.

Note that front removal is prevented by engaging protrusions 5 provided on both sides of the inner wall of the terminal accommodating chamber 1 with notches 8 provided on both front sides of the terminal fitting B.

In addition, in the case of a male terminal fitting, there are strips on both sides of the male tab.
- A protruding collar is engaged with a groove recessed in the terminal housing chamber to prevent the terminal from slipping out.

The flexible locking arm 3 is formed with a tapered surface 4 for disengaging the locking protrusion 2 in front of the locking protrusion 2, which prevents defective terminal fittings from being discovered during connector continuity tests. Then, facing this tapered surface 4, as shown in Fig. 3, a driver-like jig C is inserted, and while pushing down the flexible locking arm 3, the terminal fitting is pulled out to the rear of the housing. .

However, normal terminal fittings are small, around 5 mm in width, and therefore the tapered surface 4 formed on the flexible locking arm 3
Its height and depth are also extremely small.

Therefore, when inserting the jig C, the engagement between the jig C and the tapered surface 4 tends to be disengaged, and each time such an operation is repeated, the tapered surface 4 and the front surface of the locking protrusion 2 become distorted. There was a risk that cracks would eventually occur and the product would become unusable.

Furthermore, the formation of the tapered surface 4 guides the insertion of the jig and makes it easier to engage, but on the other hand, this tapered surface generates a downward component of force, making it difficult to engage with the jig. It was also having an effect.

In view of the above-mentioned points, the present invention provides a groove or a step in the flexible locking arm for releasing the engagement with the terminal metal fitting, thereby making it possible to ensure the insertion of the jig and to easily release the jig. This is what I did.

Next, an example will be described.

FIG. 4 shows that the locking protrusion 2 is divided into two parts on the upper surface of the flexible locking arm 3.
In addition, a long groove-shaped notch 9 is provided which is cut down below the locking projection 2 whose tip reaches the base end 3a of the arm 3.

In both of these cases, the jig is inserted between the bottom surface of the terminal fitting B and the flexible locking arm 3 by opening the long groove-shaped notch 9 dug below the locking protrusion 2. A gap for guiding and entering is now formed, and the jig and flexible locking arm no longer disengage from each other as in the past.
Since the terminal fitting can be released reliably and easily, damage to the locking protrusion 2 due to repeated operations can be prevented.

Furthermore, as shown in FIG. 6, if a jig C with a stepped portion C protruding from the intermediate portion is used, the tip of the terminal fitting B will abut against the stepped portion C, and the flexible locking arm 3 When the engagement is released, the terminal fitting B itself can be pushed out backward.

FIG. 7 shows that when the width of the locking protrusion 2 is narrower than the width of the flexible locking arm 3, step-shaped notches 11 are cut out below the locking protrusion 2 on both sides of the arm 30. It is recessed.

In this case, a gap is also formed between the bottom surface of the terminal fitting B and the flexible locking arm 3, which can be easily released by inserting a jig with a forked tip (not shown). can do.

Although the present invention is constructed as described above, the jig is easily and reliably inserted into the gap formed by the notch between the bottom surface of the terminal fitting and the flexible locking arm through the tapered surface for releasing the lock. This makes it possible to easily release the engagement between the terminal fitting and the flexible locking arm.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the main part of a conventional connector, Fig. 2 is an enlarged perspective view of the main part, Fig. 3 is an enlarged explanatory view of the main part showing the released state of the flexible locking arm, and Fig. 4 5 is an enlarged explanatory view of the main parts showing the released state of FIG. 4, and FIG. 6 is a perspective view of the main parts showing another embodiment of the present invention. FIG. 3... Flexible locking arm, 9, 11... Notch.

Claims (1)

[Scope of utility model registration request] In a connector comprising a flexible locking arm having a locking protrusion that engages with a terminal fitting in a terminal accommodating chamber of a connector housing to prevent the terminal from coming off, a tapered surface for disengaging the engagement is provided in front of the locking protrusion. A notch is provided below the locking protrusion and is continuous with the tapered surface for disengaging, and the notch extends between the bottom surface of the terminal fitting and the flexible locking arm. A connector characterized in that a gap is provided in which a release jig is guided and inserted.