JPH0261783B2 - - Google Patents

Description

[Detailed Description of the Invention] Purpose of the Invention [Field of Industrial Application] The present invention is provided with a rear holder that double prevents terminals from coming off later, and in which the rear holder is attached to a housing with a strong hinge arm having flexible elasticity. The present invention relates to an electrical connector housing having a structure in which the attached state of a rear holder can be seen at a glance.

[Conventional technology]

Generally, an electrical connector has a structure in which a flexible locking arm is provided in an internal chamber of an insulating housing, and the electrical connector is engaged with the arm to prevent the electrical connector from slipping out. However, there is a risk that the locking arm may be deformed or damaged by pulling the connecting wire, etc., and then be pulled out. In order to prevent this, for example, Japanese Patent Publication No. 57-52715 discloses a flap d (rear holder) with a protrusion c facing a cavity b opened in the leading edge housing body a, as shown in Fig. 8 a to c. It is disclosed that the terminals are connected to each other by a hinge e so as to be openable and closable, and the shoulder part f of the terminal doubles to prevent the terminal g from coming off later.

According to the above structure, the flap d is connected to the housing body a by an extremely short hinge e, and stress is concentrated on that portion each time the flap d is opened or closed. Therefore, if flap d is repeatedly attached and detached,
The hinge e breaks or turns white.

Furthermore, if the terminal g is not fully inserted as shown in c, the flap d cannot be closed.
It is necessary to push the terminal in. Furthermore, if you do not notice this and forcefully close the flap d, there is a risk of damaging the terminal g. Furthermore, if the housing has multiple terminals, that is, if it is long horizontally, even if there is a terminal in an incompletely inserted state, the flap d will be locked by the locking claws h at both ends, and the terminal will not be inserted during use. There is a risk that the device may slip out or the lock of flap d may be released.

[Problem that the invention seeks to solve]

An object of the present invention is to solve the above-mentioned problems, so that the member connecting the rear holder and the housing has sufficient durability to be repeatedly attached and detached, and furthermore, the incomplete insertion of the terminal can be automatically resolved by attaching the rear holder. ,
To provide a housing for an electrical connector whose locked state can be confirmed at a glance and which returns to its original position with its elasticity when a rear holder is incompletely attached.

Structure of the Invention [Means for Solving Problems] The electrical connector housing of the present invention has a flexible locking arm protruding from the inner wall of the terminal accommodating chamber formed inside the housing to prevent the terminal from coming off later. In this electrical connector housing, a rear holder locking hole is formed on the outer peripheral wall facing the terminal accommodating chamber, and a terminal locking hole is attached to the rear holder locking hole and the terminal locking hole is installed on the lower surface of the holder substrate. A rear holder formed of a section is connected to the outer circumferential wall by a long flexible hinge arm, and is engaged with the inner wall of the terminal accommodating chamber in front of the rear holder locking hole in the holder substrate. A rear floating prevention arm having a front floating prevention part and a locking claw that engages with the housing from the outside is provided, and when the rear holder is attached, the terminal locking part is diagonally forward into the housing from the rear holder locking hole. When the terminal is inserted in the opposite direction, the terminal in the incompletely inserted position is driven to a position where it engages with the flexible locking arm.

[Effect]

According to the present invention, the rear holder is connected to the housing by a durable long hinge arm that has flexible elasticity. Therefore, when the rear holder is attached and detached, stress is not concentrated on the fixed portions at both ends and the intermediate portion of the hinge arm, and there is no risk of breakage even when the rear holder is attached and detached repeatedly. Further, since the rear holder is held by a long hinge arm, when it is not attached, it is separated from the housing by an appropriate distance, and its attachment/detachment state can be determined at a glance.

The terminal holding plate of the rear holder is inserted diagonally from above the rear part of the rear holder locking hole, and the terminal can be pushed forward using the lever principle, so incomplete insertion is automatically resolved and the terminal is securely inserted. Double locked.
Therefore, stable electrical connection can always be achieved.

〔Example〕

Hereinafter, the present invention will be specifically explained with reference to the drawings.

1 is an insulating housing for a male connector,
Inside thereof, a plurality of terminal accommodating chambers 2 are formed in two stages, upper and lower. Each terminal housing chamber 2 has a terminal 12 at the front end.
A flexible locking arm 4 having a recess 4a at its tip is protruded from the inner surface of the upper wall 1a (the upper and lower outer circumferential walls of the housing 1). 4a engages with the rear end of the electrical contact portion 12a of the terminal 12 to prevent it from coming off.

Further, on the upper and lower outer circumferential walls 1a of the housing 1, two slit-shaped slits are provided facing both sides of each of the locking arms 4.
A rear holder locking hole 5 is provided in the left and right peripheral walls 1b, and rear floating prevention arms 9 (to be described later)
A locking hole 6 is opened for the.

Reference numeral 7 denotes a rear holder, in which both ends of a holder board 8 extending across the housing 1 are supported by rear anti-float arms 9 having locking claws 9a inside, and the arms 9 are flexible long ones. The left and right outer peripheral walls 1b of the housing 1 are connected to each other via long hinge arms 10.
is connected to the rear end of the The holder substrate 8 has a plurality of terminal holding plates 11 on the lower surface thereof corresponding to the two rear holder locking holes 5.

The terminal holding plate 11 is an axe-shaped plate body, and has a front floating prevention part 11a that slightly protrudes from the holder substrate 8 at the front end, and a terminal locking part 11c that hangs down via a front descending slope part 11b. It has a rear stopper part 11d that is substantially perpendicular to the rear end, and a terminal locking part 11c.
The rear stopper portion is continuous with the lower edge portion 11e.

Before the terminal holding plate 11 is attached to the rear holder locking hole 5, the lower edge 11e is located on the housing above the rear part of the locking hole 5 with an appropriate distance C from the lower outer circumferential wall 1a. There is. Further, the hinge arm 10 has a length sufficient to support the rear holder 7 in a pre-installation state apart from the upper and lower outer circumferential walls 1a of the housing 1, and to allow the rear holder 7 to be installed and moved into the locking hole 5.

Next, a method for mounting the rear holder 7 and locking the terminal 12 will be explained.

As shown in FIG.
When inserted, the tip of the electrical contact portion 12a contacts the protruding wall 3, and the rear end engages with the recess 4a of the locking arm 4, preventing it from coming off forward and backward, respectively, and becoming locked. .

Next, the rear holder 7 located above the rear part of the rear holder locking hole 5 is pushed down in the direction of the arrow A, its terminal holding plate 11 is inserted into the locking hole 5, and the holder board 8 is moved in the direction of the arrow A as shown in FIG. When pushed in the direction of line B, the hinge arm 10 is bent downward and the rear floating prevention arm 9 descends along the left and right outer peripheral walls 1b of the housing 1, and its locking claw 9a engages in the locking hole 6, Locked.

When the terminal holding plate 11 is pushed in, the plate 11 rotates around the base end P of the front floating prevention portion 11a, and a large acting force is generated on the terminal locking portion 11c based on the lever principle. Therefore, even if the terminal 12 is incompletely inserted, the terminal locking part 11c comes into contact with the stabilizer 12b provided at the rear of the electrical contact part 12a and pushes it out forcefully, as shown in FIG. From there, the terminal 12 advances to its normal position. As a result, the terminal 12 is always engaged with the locking arm 4 and is securely locked. Moreover, since the locking arm 4 is sandwiched between the terminal holding plates 11, 11 on both sides and its movement in the left-right direction is restricted, there is no risk of damage even if the electric wire 13 is strongly pulled.

In this way, the terminal 12 is doubly locked by the locking arm 4 and the terminal holding plate 11, so that the holding force is large, and even if the housing 1 is downsized, sufficient holding force can be obtained.

Furthermore, even if an upward force is applied to the rear holder 7, that is, the holder substrate 8, the front lifting prevention portion 11a of the terminal holding plate 11 engages with the inner wall of the terminal accommodating chamber 2 in front of the rear holder locking hole 5. There is no risk of it rising. Furthermore, since the rear stopper portion 11d of the terminal holding plate 11 abuts against the back wall 5a of the locking hole 5, there is no fear of the terminal falling out. In this way, the rear holder 7 has the terminal holding plate 11 and the rear holder locking hole 5.
It is locked by the cooperative action of the rear floating prevention arm 9 and the locking hole 6.

To release this lock, the arm 9 is expanded outward to release the engagement with the locking hole 6, and the rear end of the holder board 8 is moved in the opposite direction to the arrow B in FIG. All you have to do is lift it around P.

In addition, since the hinge arm 10 has flexibility and is formed to be long, even if the rear holder 7 is repeatedly attached and detached, no strong stress is applied to the fixed portions at both ends thereof. Therefore, there is no risk of the hinge arm 10 being cut or the rear holder being separated.

5 to 7 show other embodiments of the invention.

The rear holder 7' is connected to the left and right outer peripheral walls 1b of the housing 1 by longer hinge arms 10' without the rear floating prevention arm 9, and has a hook-shaped locking claw at the tip at the rear of the holder base plate 8. A rear floating prevention arm 9' having a designation 9'a is provided in a protruding manner.

Also, corresponding to the locking claw 9'a of the arm 9',
Tapered 14 at the inner edge on the terminal insertion side of the terminal accommodation chamber 2
A cutout groove 14 with a mark is provided.

To install the rear holder 7' in this case, as shown in FIGS. 6 and 7, insert the rear holder 7' from above the rear part of the rear holder locking hole 5 in the A direction and push it down in the B direction. If so, the locking claw 9'a of the rear floating prevention arm 9' engages with the cutout groove 14 and is locked. Other functions are the same as above.

Effects of the Invention As described above, the present invention provides an electrical connector housing comprising a flexible locking arm protruding from the inner wall of a terminal accommodating chamber formed inside the housing to prevent terminals from coming off later. For a housing in which a rear holder locking hole is formed in the wall facing the terminal accommodating chamber, a rear holder that is attached to the rear holder locking hole and having a terminal locking part formed on the lower surface of the holder substrate is made of flexible elastic material. The housing is connected to the outer circumferential wall by a long hinge arm having a front floating prevention part that engages with the inner wall of the terminal accommodating chamber in front of the rear holder locking hole, and a front floating prevention part that engages with the inner wall of the terminal accommodating chamber in front of the rear holder locking hole. A rear lifting prevention arm is provided with a locking claw that engages, and when the rear holder is installed, the terminal locking portion is inserted obliquely forward into the housing from the rear holder locking hole, thereby preventing the incomplete insertion position. Since the terminal is driven to a position where it engages with the flexible locking arm, incomplete insertion of the terminal can be prevented by attaching the rear holder, and the flexible locking arm can be moved. The terminals can be securely double-locked using the rear holder and the rear holder to ensure a stable electrical connection at all times.

In addition, since the rear holder is connected to the housing by a durable long hinge arm with flexible elasticity, it will not break even if it is repeatedly attached and detached, and its attachment status can be determined at a glance, and the rear holder is not damaged. When fully attached, its elasticity has the effect of returning to the original position.

Furthermore, the holder board is provided with a front floating prevention arm that engages with the inner wall of the terminal accommodating chamber in front of the rear holder locking hole and a rear floating prevention arm that has a locking claw that engages with the housing from the outside. Therefore, it is easy to attach the rear holder to the rear holder locking hole, and the locking to the housing can be ensured by the rear floating prevention arm.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an electrical connector housing showing an embodiment of the present invention, Fig. 2 is a cross-sectional view of the main parts showing its assembled state, and Figs. 3 and 4 respectively show how to attach two rear holders. FIG. 5 is a perspective view showing another embodiment of the present invention, FIG. 6 is a sectional view of the main parts showing its assembled state, and FIG. 7 is an explanatory view showing how to attach the rear holder. Figure 8 a-c
are explanatory diagrams of conventional examples, respectively. 1...Housing, 2...Terminal housing chamber, 4...
Locking arm, 5... Rear holder locking hole, 7, 7'
...Rear holder, 8...Holder board, 9,9'...
... Rear floating prevention arm, 10, 10'... Hinge arm, 11... Terminal holding plate, 11a... Front floating prevention part, 11c... Terminal locking part.

Claims (1)

[Claims] 1. In an electrical connector housing comprising a flexible locking arm protruding from the inner wall of a terminal accommodating chamber formed inside the housing to prevent terminals from coming off backwards, a rear holder engagement arm is provided on the outer peripheral wall facing the terminal accommodating chamber. A rear holder, which is attached to the rear holder locking hole and has a terminal locking portion formed on the lower surface of the holder substrate, is attached to a housing provided with a locking hole by a long flexible hinge arm. A rear floating device that is connected to the outer circumferential wall and has a front floating prevention portion that engages with the inner wall of the terminal accommodating chamber in front of the rear holder locking hole and a locking claw that engages with the housing from the outside on the holder board. When the rear holder is installed, the terminal locking portion is inserted obliquely forward into the housing from the rear holder locking hole, thereby flexiblely locking the terminal in the incompletely inserted position. A housing for an electrical connector characterized by being driven into a position where it engages with an arm.