JPS628476A - Connector housing construction - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a connector for connecting an electric circuit, and more particularly to a housing structure for securely fixing terminals.

Conventional technology An electrical connection terminal is inserted into a terminal accommodating chamber in a housing from the rear, and a terminal stopper is provided near the front end of the terminal accommodating chamber to stop the terminal from advancing, and the terminal is directed forward from the side wall surface of the terminal accommodating chamber. For example, a connector structure in which a flexible locking arm is provided to prevent the terminal from retreating is disclosed in Japanese Patent Publication No. 51-3, for example.
0270 and the like.

Such a connector is constructed as shown in FIG.
It has the advantage of being easy to assemble.

In the figure, 1 is a housing, 2 is a terminal, 3 is an electric wire to which the terminal 2 is crimped, 1a is a terminal stopper, and 1b is a locking arm. When the terminal 2 is inserted from the rear of the housing l, the terminal 2 moves forward by pushing up and flexing the locking arm lb, and when it comes into contact with the stopper 1a, the locking arm 1b returns downward due to its elasticity, causing the terminal 2 to rot afterward. It is designed to support 2a.

However, with this kind of locking structure, it is not easy to check whether the inserted terminal is completely locked or not, so if it is assembled into a device with the inserted terminal incompletely inserted, the terminal may become loose during use. Not only did it cause failures such as falling off, but it was also difficult to locate the failure location.

Therefore, various improvements have been proposed in which a double locking structure is provided to prevent the terminal from easily falling off even if it is incompletely locked after the terminal is inserted into the housing, but all of these have complicated structures. This has the disadvantage of increasing component costs and assembly costs.

Problems to be Solved Focusing on the above-mentioned circumstances, the present invention provides a connector housing that allows the connector to be easily assembled without complicating the structure, and that is securely locked and will not come off. It is intended to.

Means for Solving Problems An object of the present invention as described above is to provide a housing having a space into which a connector terminal can be inserted from the rear, a terminal stopper provided at the front end of the space, and a locking stage provided on the inner wall of the space. an inner wall surface facing the terminal engaging recess, comprising a terminal engaging recess formed between the stepped part and a flexible locking arm protruding into the space from the rear of the stepped part to the front; This can be achieved by introducing a configuration that allows spacers to be inserted along the sides.

Furthermore, the spacer used here is preferably one that is inserted from the front end of the housing, preferably formed in a plate shape, and provided with a locking means that engages with the housing body and prevents it from falling off. It is.

Embodiment One example of the connector housing structure of the present invention will be explained with reference to FIGS. 1 to 5.

FIG. 1 shows a cross section of a connector assembled using the connector housing of the present invention, where 1 is a housing, 2 is a terminal, and 3 is a connector assembled using a connector housing of the present invention.
numeral 4 is an electric wire to which the terminal 2 is crimped and fixed, and 4 is a spacer. A terminal stopper 1a is provided at the front end of the housing 1, and a locking arm 1b projects forward from the inner wall of the housing 1. On the other hand, a locking step IC is provided on the inner wall at approximately the same position as the tip of the locking arm 1b.
An engagement recess 1d into which the head 2b of the terminal 2 can fit is formed between the locking step lc and the terminal stopper 1a. Although the distance between the bottom wall surface 1e facing the engagement recess 1d and the lower surface of the locking step 1c is larger than the height of the terminal head 2b, when the spacer 4 is inserted along the bottom wall surface 1e, the upper surface of the spacer 4 The thickness of the spacer 4 is determined so that the distance from the lower surface of the locking step 1c is smaller than the height of the terminal head 2b.

5 is a tab-shaped terminal for coupling with the connector of this example, and 4a is a terminal guide.

FIG. 2 shows a cross section taken along line A-A in FIG. 1, and FIG.
A cross section taken along line B-B in FIG. 1 is shown. Moreover, FIG. 4 shows a longitudinal section of the housing during the connector assembly process. FIG. 5 (al) shows a horizontal cross section of the housing before assembling the connector, and FIG. 5 (b) and (C) show the top and side surfaces of the spacer.

The spacer 4 is plate-shaped and has locking claws 4b at both end portions for locking onto the housing 1.

4C is a long through hole, which is provided so that the locking claw 4b can be bent. The terminal guide 4a is provided to guide the tip of the tab-shaped terminal 5 to the correct insertion position when the tab-shaped terminal 5 is inserted from the front end of the connector.

When the terminal 2 is inserted from the rear into the housing 1 of the present invention configured in this way, the head 2b of the terminal moves forward by passing under the locking arm 1b while bending it, and the shoulder portion 2a is moved forward. By coming out in front of the stop arm 1b, the
Free movement in any direction. After this, if the spacer 4 is inserted from the front end of the housing 1, the tip of the spacer 4 will slip under the tip of the terminal 2, push up the terminal head 2b, engage the engagement recess 1d, and then insert the spacer 4 into the housing 1. The locking claw 4b of the spacer 4 is locked to the locking portion 1f of the spacer 4. In this state, the head 2b of the terminal is located at the base of the housing 1.
The terminal 2 is securely held between the 7 pad 1a and the locking step 1c.
terminal 2 unless deformation or destruction of housing 1 occurs.
It never goes away.

On the other hand, if an attempt is made to insert the spacer 4 with the terminal 2 incompletely inserted, the terminal head 2b remains pressed against the bottom surface 1e of the housing by the locking arm 1b, and the locking step IC remains pressed against the bottom surface 1e of the housing. Since the lower surface prevents the spacer 4 from being pushed upward, the tip of the spacer 4 cannot get under the terminal 2, but instead pushes the terminal 2 backward from the housing l. Therefore, if the terminals 2 are incompletely inserted, the connector cannot be assembled.

Further, in the case of a multi-pole connector, it is also possible to use a similar spacer that is three-dimensionally integrally molded. in this case,
By providing a tab-shaped spacer corresponding to each terminal accommodating chamber, it is possible to configure a structure that functions similarly to the previous embodiment for each inserted terminal.

Effects of the Invention Although the connector housing structure of the present invention has the above-described configuration, the flexible locking arm is not intended to have a terminal locking function, but the locking arm is designed to engage the terminal. It is equipped with a positioning function to guide the user to the desired position. The terminal is locked by fitting the engaging part of the terminal into the engaging recess of the housing using a spacer.
It has the advantage that reliable and strong engagement can be achieved, and the assembly of the connector is easy and reliable, and incomplete assembly does not occur.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an example of the connector housing of the present invention;
Figure 2 is a horizontal cross-sectional view taken along the line A-A, and Figure 3 is its B
4 is a sectional view of the housing during assembly of the connector; FIGS. 5 (a), (b) and (C1 are horizontal sections of the housing, and the top and side surfaces of the spacer, respectively). , Fig. 6 is a diagram showing the prior art. Patent applicant: Yazaki Sogyo Co., Ltd. Fig. 2

Claims (2)

[Claims] (1) In a housing having a space into which a connector terminal can be inserted from the rear, a terminal engaging recess formed between a stopper provided at a front end position of the space and a step provided on an inner wall of the space; A flexible locking arm protrudes into the space from the rear of the stepped portion toward the front, and is configured such that a spacer can be inserted along the inner wall surface facing the terminal engaging recess. Connector housing structure. (2) The connector housing structure according to claim 1, wherein the spacer is configured to be inserted from the front end of the housing.