JPH0240875A - Falling preventing device of cable connector - Google Patents

Abstract

PURPOSE:To prevent the falling of a plug by providing a bilateral pair of latches so as to be rotatable in the internal and external directions, and giving the oscillating pieces of the latches such a rotating force as turning their front parts inward. CONSTITUTION:The rear part 30a of an oscillating piece 30 is swelled slightly backward of the outside, and on the front end of the oscillating piece 30, a hook 31 facing inside which is protruded slightly ahead of a case 22 and engaged with the engaging channel 6 of a plug receiver 1 is provided. In both latches 26, the both hooks 31 are energized in the mutually approaching direction by the elasticity of both thin elastic pieces 29 whose inner ends are made in force contact with each other. When a plug 21 is connected to the plug receiver 1, the angle part of each fixture 5 in the plug receiver 1 pushes open each oscillating piece 30 of the both latches 26 in the plug 21 against the thin elastic pieces 29, and each hook 31 is engaged with the engaging channel 6 over the angle part of the fixture 26. Hence, the falling of the plug 21 can be prevented.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is designed to prevent the plug and plug receiver of a cable connector from being accidentally removed even if the cable is subjected to impact or the cable is pulled during use. This relates to a device that has been used.

[Conventional technology]

The simplest means to prevent the plug of a cable connector from coming off is to screw the side ends of the flanges provided on the opposing surfaces of the plug and the plug receiver.

However, in this case, it is troublesome to remove the plug prematurely, and there is a risk of losing the screw.

To solve this problem, devices as shown in FIGS. 4 and 5, for example, are known.

(1) is the plug holder of the cable connector, (2) is the plug holder on the main body, (3) is the plug holder on the flange provided on the main body (2), and (4) is the electrical conductor.

One synthetic resin locking tool (5) is screwed to both ends of the back surface of the flange (3). An engagement groove (6) facing in the vertical direction is formed on the outer surface of the locking tool (5).

(7) is the plug of the cable connector, (8) is the plug body, (9) is the pin, (10) is the flange, (II) is the cable, and the plug (7) is attached from the side of the plug body (8). A pair of left and right spring latches (12) are fixedly attached, slightly spaced apart from each other and parallel to the spring latches.

At the front ends of both spring latches (12), there are hooks (13) that protrude slightly forward from the flange (10), are bent in opposite directions, and engage with the engagement groove (6). ) are provided consecutively.

As shown in Fig. 4, if the plug (7) of the connector described above and the plug receiver (1) are fitted together, the spring latch (
12) is elastically bent, and its hook (13) engages with the engagement groove (
6) to prevent the plug (7) from coming off.

Also, hold the rear ends of both spring latches (12) with your fingers, etc.
If the hooks (13) are pressed in opposite directions, the hooks (13) will separate from the engagement grooves (6), allowing the plug (7) to be pulled out.

[Problem to be solved by the invention]

Although the above-described device is effective in preventing the plug (7) from coming off, the spring latch (12) is complicated to manufacture and install, and the connector is expensive.

[Means for resolving charges]

The present invention provides an engaging groove on both left and right side surfaces of either the plug or the plug receiver of a cable connector, and also includes a rocking piece that has an inward hook on the front end that can engage with the engaging groove on the other side. A pair of left and right latches each having an inward piece connected to the rear end thereof are provided so as to be able to rotate in the inward and outward directions, and the inner end of the inward piece of each of the latches protrudes rearward, and these protruding portions are provided. By applying an outward elastic force to the latch, a rotational force is applied to the swinging piece of the latch so that the front part of the latch turns inward, thereby solving the above-mentioned problem.

[For production]

The swinging pieces of the left and right latches are urged to rotate in the direction in which their front ends approach each other, so the hooks engage with the engagement grooves, preventing the plug and the plug receiver from coming off. .

When the rear ends of both latches are pushed toward each other and pulled backward, the front ends of the swinging pieces of both latches rotate away from each other, and the engagement between the hook and the engagement groove is released. , the plug and plug receiver are separated.

〔Example〕

1 and 2 show a first embodiment of the present invention, and the same members as those of the above-mentioned conventional cable connector are given the same reference numerals and explanations thereof will be omitted.

In the plug (2I) of the cable connector to which the present invention is applied, a plug case (22) made of synthetic resin is provided with a rectangular bottomed fitting hole (23) in the center of the upper surface thereof.

Further, an insertion groove (24) that widens at both ends is provided between the side surface of the fitting hole (23) and the side surface of the case (22).

An arcuate engagement hole (25) is provided in the center of the insertion groove (24).

(26) is a latch made of synthetic resin that forms a pair of left and right and has an inward piece (27) connected to the rear end of the swinging piece (30), and the inward piece (27) and the intermediate part thereof are connected to each other. The case (22) is assembled by fitting the integrally formed support shafts (28) into the insertion grooves (24) and the engagement holes (25) of the case (22), respectively.
) is installed.

A fitting hole (23) is provided at the inner end of each inward facing piece (27) (27).
A pair of left and right thin-walled elastic pieces (29) (29) are connected to each other, curved toward the rear inside, and having their tips pressed against each other.

The rear portion (30a) of the rocking piece (30) bulges slightly outward and rearward. The front end of the rocking piece (30) protrudes slightly forward from the case (22) and has a plug receiver (1
) Inward hook (31) that engages with the engagement groove (6) of
is provided.

(32) is a stopper provided at a suitable position on the inner surface of the swinging piece (30).

Both latches (26) (26) are biased in a direction in which both hooks (31) (31) approach each other due to the elasticity of both thin elastic pieces (29) (29) whose inner ends are pressed against each other. .

The cover (33) is attached to the top surface of the case (22) with screws (3).
4), and covers the fitting hole (23).

As shown in Figure 2, the plug (21) and plug receiver (1)
), each locking tool (5) of the plug receiver (1)
The corners of both latches (26) (26) of the plug (21)
) is pushed open against the thin elastic piece (29), and each hook (31) goes over the corner of the locking tool (5) and fits into the engagement groove (6). to prevent the plug (21) from coming off.

With the plug (21) and plug receiver (1) combined,
Rear part (30a) of both rocking pieces (30) (30) (30
If a) is pulled backwards against the thin elastic piece (29) with fingers or the like in a direction in which they approach each other, each hook (
31) rotates outward and disengages from the engagement groove (6), allowing the plug (21) to be pulled out.

FIG. 3 shows a second embodiment of the present invention, in which the same members as in the previous embodiment are given the same reference numerals and their explanations will be omitted.

In the plug (41) of this embodiment, the left and right inward pieces (27) are replaced with the two thin elastic pieces (29) (29).
) (27) are connected within the fitting hole (23) by a thin elastic piece (42) that curves backward in a semicircle.

Even in this case, the same effect as in the first embodiment can be obtained, and the number of parts can be reduced, which is convenient.

In both embodiments, the latch was pivoted by fitting the support shaft provided in the latch into the engagement hole provided in the case, but it was also possible to form an engagement hole in the latch and provide a protrusion in the case. It may also be fitted externally onto the pin.

The center of the support shaft (28) of the latch (26) and the case (22)
), a shaft hole may be provided at the center of each engagement hole (25), and both shaft holes may be connected by a shaft rod such as a spring shaft.
11 Although not shown in the drawings, an inward rotational force may be applied to the front ends of the rocking pieces of the latches by interposing a spring between the inner ends of the inward pieces of the left and right latches.

〔Effect of the invention〕

The performance of the device of the present invention is as good as that of conventional devices,
Furthermore, it is easy to operate and assemble.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the first embodiment of the present invention, FIG. 2 is a plan view of the same when combined, FIG. 3 is an exploded perspective view of the second embodiment of the invention, and FIG. , an exploded perspective view of a conventional cable connector, and FIG. 5 is a plan view of the same when connected. (11) Cable (13) Hook (22) Plug case (24) Insertion groove (26) Latch (28) Support shaft (30) Swing piece (31) Hook (33) Cover (41) Plug (12) Spring latch (21) Plug (23) Fitting hole (25) Engagement hole (27) Inward piece (29) Thin elastic piece (30a) Rear part (32) Stopper (34) Screw (42) Thin elastic piece (1) Plug receiver ( 3) Flange (5) Locking device (7) Plug (9) Pin (2) Plug receiver is main body (4) Electrical conductor (6) Engagement groove (8) Plug main body (10) Flange Figure 5

Claims (4)

[Claims] (1) Engagement grooves are provided on both left and right sides of either the plug or the plug receiver of the cable connector, and the rear of the swinging piece is provided with an inward hook on the front end that can engage with the engagement groove on the other side. A pair of left and right latches each having an inward facing piece attached to the end thereof are provided so as to be able to rotate in the inward and outward directions, and the inner end of the inward facing piece of each latch is made to protrude rearwardly, and these protruding parts A device for preventing disconnection of a cable connector, characterized in that an outward elastic force is applied to a swinging piece of a latch to provide a rotational force that causes the front part of the swinging piece to turn inward. (2) By providing elastic pieces at the inner ends of the inwardly facing pieces of the left and right latches, and by bringing the left and right elastic pieces into contact with each other, the swinging piece of the latch is rotated so that its front part faces inward. The device for preventing disconnection of a cable connector according to claim (1), which is provided with a power. (3) By connecting the inner ends of the inward facing pieces of the left and right latches with a curved elastic piece, the swinging piece of the latch
2. The device for preventing disconnection of a cable connector according to claim 1, wherein the front portion of the cable connector is provided with a turning force to turn inward. (4) A claim in which a spring material is interposed between the inner ends of the inwardly facing pieces of the left and right latches, thereby imparting a rotational force to the swinging pieces of the latch so that the front portion thereof faces inward. (1)
Disconnection prevention device for the cable connector described.