JPH0316225Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a connector with an improved structure for preventing terminals inserted into an insulating housing from falling out later.

[Conventional technology]

The applicant proposed a terminal fitting as shown in FIG. 6 (Kokoku No. 53631029) in which a terminal fitting is held by itself within an insulating housing without cutting a lance on the terminal.

That is, A is an insulating housing made of synthetic resin, B is a terminal, and a terminal accommodation chamber a formed in the insulating housing A is provided with an elastic pressing piece b and a locking step c, while a bottom plate portion of the terminal is d is provided with a locking hole e.

To lock the terminal B, when the terminal is inserted into the accommodation chamber a of the housing B from the rear, the terminal is pressed by the elastic pressing piece b and moves forward while slidingly contacting the locking step c, until it reaches the locking hole e. It engages with the stepped portion c and stops moving back and forth, and its upper end is pressed by the elastic pressing piece b.
This is done by keeping it constantly.

[Problem that the invention attempts to solve]

According to the above configuration, the holding force for terminal B is
This depends exclusively on the spring force of the elastic press piece, but since the press piece is molded with resin, it ages over time and its spring force decreases, and its dimensions are limited in relation to the storage chamber. There was a problem in that it was difficult to apply a sufficiently large spring force, resulting in a lack of reliability in preventing terminals from falling out later.

An object of the present invention is to solve the above-mentioned problems and provide a connector that can reliably prevent terminals from coming off over a long period of time without being affected by a decrease in spring force due to aging of the elastic pressing piece.

[Means for solving problems]

In order to achieve the above object, the connector of the present invention is provided with an elastic pressing piece and a locking step part facing each other in a housing chamber for a terminal in an insulating housing, and a terminal inserted into the housing chamber is held by the elastic pressing piece. In the connector, the terminal is provided with a locking hole, and the elastic pressing piece is provided with a locking hole. A locking protrusion that engages to temporarily lock the terminal is provided, and a plate-shaped spacer having a locking means is provided between the insulating housing or the elastic pressing piece, and the spacer is connected to the terminal and the elastic pressing piece. By inserting the elastic pressure piece between the terminals, the primary locking is released and the pressing force of the elastic pressing piece against the terminal is strengthened through the spacer.

[Effect]

According to the present invention, the elastic pressing piece having the locking protrusion that engages with the locking hole of the terminal only performs the primary locking until the spacer is inserted, and the full-scale locking is for locking inside the storage chamber. This is done by strongly pressing the terminal against the stepped portion with an elastic pressing piece through a spacer.

Therefore, even if a strong tension is applied to the terminal through the wire, there is no risk of damage to the elastic pressing piece or its locking protrusion, and there is no significant effect on dimensional limitations or aging of the elastic pressing piece. It is possible to reliably prevent the terminal from coming off later without causing any damage.

Hereinafter, the above configuration and operation will be specifically explained with reference to drawings showing examples.

〔Example〕

In FIGS. 1 to 4, A is an insulating housing, B is a terminal, and C is a spacer.

In the illustrated example, the insulating housing A is configured for connection with a fuse (not shown), and inside thereof, housing chambers 1 and 1' for the terminals B are formed in two opposing stages, upper and lower, each housing chamber 1, 1. ' is provided with an elastic pressing piece 2 and a locking groove 3 facing each other.

The elastic press 2 is provided in a U-shape at the tip of the upper and lower partition wall 4 at the rear of the storage chamber and extends toward the front of the storage chamber. An arcuate locking protrusion 5 is provided facing the chamber side. The locking groove 3 has a step 7 between it and the upper wall 6 of the storage chamber, and this step 7 functions as a locking step that prevents the terminal from being pulled out rearward in the axial direction (rearward withdrawal). Note that 8 is a front stopper wall that prevents the terminal B from coming off in the front.

The terminal B has a receiving part 11 for a male terminal (not shown) formed by bending the free edges of the upstanding side walls 10 on both sides of the bottom plate part 9 above the bottom plate part 9, and a receiving part 10 from the tip of the bottom plate part. It has an elastic contact plate 12 that is folded inward, and a locking hole 13 is provided in the bottom plate portion 9.

The spacer C is an insulating plate made of synthetic resin, and has a recess 14 in the center of its front half that engages with the locking protrusion 5, and an inclined surface 15 toward the recess 14 at the tip. It is provided. In this spacer C, base ends of two spacers C are connected in a U-shape by a connecting plate 16, and a reinforcing plate is inserted between the spacers. 17 is stretched to strengthen its rigidity.

First, when the terminal B is inserted into the upper and lower housing chambers 1 and 1' of the insulating housing A from the rear, the terminal moves forward while pressing down the elastic pressing piece 2. Next, locking hole 1
3 reach the locking protrusion 5, they engage with each other, and the receiving part 11
is pressed toward the locking groove 3 by the elastic pressing piece 2, and the rear end of the receiving portion 11 abuts against the step 7 of the locking groove, so that the terminal B is temporarily locked.

The above is the same as the conventional locking structure, but in this primary locking state, the spacer C is
1' from the front, the spacer enters while contacting the lower surface of the terminal bottom plate 9, and the tip of the spacer comes into contact with the terminal B and the elastic pressing piece 2 due to the presence of the inclined surface 15.
move forward so as to separate the Furthermore, when the spacer C is pressed, the elastic pressing piece 2 is pushed down,
The locking protrusion 5 is completely separated from the locking hole 13. When the recess 14 of the spacer C reaches the locking protrusion 5, the spacer C is locked by the elastic return of the elastic pressing piece 2. At the same time, the terminal B is pressed against the locking groove 3 side with a stronger force by the spacer C inserted between the elastic pressing piece 2, and the engagement between the receiving part 11 and the step 7 causes Subsequent omission is reliably prevented.

[Embodiment]

1 to 4 show representative examples of the present invention, and an example in which the insulating housing A is configured as a fuse connection housing has been explained.
In the figure, by extending the projecting wall 18 at the front end of the housing as a surrounding wall, it is possible to form a normal female connector housing.

Further, the locking groove 3 for preventing the terminal B from coming off later can be replaced with a locking step c that has the same effect as the step 7, as shown in FIG. 6 showing the conventional example. .

Furthermore, the spacer C constitutes a locking means with the locking protrusion 5 of the elastic pressing piece 2 by providing the recess 14, but is not limited to this, and the spacer C is connected to the inner wall of the storage chamber 1 or the outer wall of the insulating housing A. A locking means may be provided between. To explain this more specifically with reference to the drawings, in FIG. 5A, L-shaped lock arms 19 are formed on both sides of the connecting plate 15 of the spacer C in FIG. ) is provided with a locking pawl 20 that engages with. Further, in FIG. 5B, locking claws 20' are provided on both sides of a spacer C' formed for a single-pole connector to engage into locking holes (not shown) in the side wall of the storage chamber. In this way, when the spacer is provided with a locking means that engages with a portion other than the elastic pressing piece 2 of the storage chamber 1, the recess 14 of the spacer C can be omitted.

[Effect of idea]

As described above, the connector of the present invention has a structure in which the elastic pressing piece in the accommodation chamber only temporarily locks the terminal, and full-fledged locking is performed by inserting the spacer. It is possible to reliably prevent the terminal from coming off over a long period of time, regardless of aging of the piece or dimensional limitations.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an example of the connector of the present invention, FIG. 2 is a perspective view of the same as above, FIG. 3 is a perspective view of terminal B of same as above, FIG. 4 is a perspective view of spacer C of same as above, Figures 5A and 5B are perspective views showing other embodiments of the spacer, and Figure 6 is a vertical sectional view of a conventional connector. A...Insulating housing, B...Terminal, C...Spacer, 1, 1'...Accommodating chamber, 2...Elastic pressing piece,
3... Locking groove (step for locking hole), 5... Locking protrusion, 14... Recess, 15... Inclined surface.

Claims (1)

[Claims for Utility Model Registration] An elastic pressing piece and a locking step are provided facing each other in a housing chamber for a terminal in an insulating housing, and a terminal inserted into the housing chamber is pressed against the opposite side by the elastic pressing piece. In the connector, the locking step portion prevents the terminal from being pulled out in the axial direction rearward, wherein the terminal is provided with a locking hole, and the elastic pressing piece is engaged with the locking hole to lock the terminal. In addition to providing a locking protrusion for primary locking, a plate-shaped spacer having a locking means is provided between the insulating housing or the elastic pressing piece, and the spacer is inserted between the terminal and the elastic pressing piece. A connector characterized in that the primary locking is released and the pressing force of the elastic pressing piece against the terminal is strengthened through the spacer.