JPH07166752A - Floating latch incorporating switch - Google Patents

Abstract

PURPOSE:To prevent the operation of a floating latch from being hindered, so as to short-circuit and isolate resilient contact pieces of short-circuiting conductors in smooth slidable contact and separate motion by obliquely extending the resilient contact pieces toward contact plates of a pair of stationary conductors during push-in of the movable member. CONSTITUTION:When a pressure receiving surface 2a of a movable body 2 is depressed by a pressing member such as a striker during closing of a door, a short-circuiting conductor 5 incorporated to the movable body 2 is lowered from a position indicated by a solid line to a position indicated by a chain line. Then, a pair of resilient pieces 5b which are obliquely extended in the conductor 5, and contact plates 4b of a pair of stationary conductors 4 provided at the inner wall surface of a stationary cylinder 1 are made into slidable contact with each other. Then, upon closing of a door, a switch is turned on, and upon closing of the door, the switch is turned off. With this arrangement, a floating latch and the switch can be integrally incorporated with each other, and the switch can be smoothly made into slidable contact and can be separated without hindering the operation of the latch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
Another object of the present invention is to provide, for the first time, an embossing latch that is attached to a machine frame or the like to be pushed and opened, and that has a switch function.

[0002]

2. Description of the Related Art For example, when the internal lighting is turned on when the door is opened, the conventional door is turned on and off by the movement of the door.
Attach the switch to F. Normally, the switch is mounted on the main body side and the actuator of the switch is pushed by the back surface of the door. Since the door rotates, the pushing amount varies depending on the place, and the preferable pushing amount of the actuator is limited. Therefore, time and nerves are used to set the switch position.

[0003]

Recently, a small door is not attached with a pull handle, and the main method is to push the closing latch on the back side to close it, and to open it by pushing the latch. It is necessary to mount the embossing latch and the above-mentioned switch separately on the back side, which requires a large space. Therefore, the inventor of the present invention has an idea that the embossment latch has a function of a switch to eliminate the trouble of the conventional switch positioning and the problem of separately mounting the latch and the switch.

[0004]

According to the present invention, there is provided a switch-equipped levitation latch which is slidable along the inner wall of the fixed fixed cylinder and movable in the direction of insertion and removal, and which is resistant to the coil spring. When it is pushed all the way in, it is restrained there, and when it is pushed next, the insulating movable body is released, the clamping claw around the pressure receiving surface at the outer end of the movable body, and the fixed cylinder. Contact plates are arranged side by side on the inner wall surface of the rear part in a manner extending in the moving direction of the movable body.
Each of the terminals integrated with the contact plate includes a pair of fixed conductors protruding outside the fixed cylinder, and a short-circuit conductor having a base engaged with the inner end of the movable body, and the short-circuit conductor is pushed when the movable body is pushed. It is characterized in that each elastic contact piece which is in sliding contact with the contact plates of the pair of fixed conductors extends obliquely in the direction of the contact plates of the fixed conductor.

[0005]

The most important feature of the present invention is that the embossing latch and the switch, which conventionally have to be separately mounted, are integrated. However, it is not easy to assemble a switch inside the latch because the latch itself is composed of a complicated combination of minute parts. In the present invention, the fixed cylinder and the movable body, which are the main components, are electrically insulated. Then, the contact plates of the pair of fixed conductors were attached to the inner wall at the inner side of the bottomed fixed cylinder so that the contact plates adhered to the wall surface, and the terminals were exposed outside the cylinder. All that is required is to attach a shorting conductor to the movable body without interfering with all the original operations of the latch. The base of the short-circuit conductor was engaged with the inner end of the movable body, and two elastic contact pieces were obliquely extended from the base toward the contact plates of the pair of fixed conductors. With this, a short-circuit conductor could be attached to the movable body without disturbing its operation. When the movable body is pushed in, the elastic contact piece of the short-circuit conductor comes into sliding contact with the contact plates of the pair of fixed conductors due to its own elasticity.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIGS. FIG. 1 is an exploded view in which the features are clearly drawn. Prior to the description, a conventional embossing latch will be briefly described with reference to FIG. The applicant of the present invention is shown in FIGS.
The relief latch proposed in Japanese Patent Publication No. 977 is drawn in the order of operation, and the operation mechanism is the same as that of the present invention. The part numbers and names match those in FIGS. 1 to 3. FIG. 4 shows a state in which the pressurizing body (strike) S pushes the movable body 2 into the fixed cylinder 1. A is a latch mounting plate, and when the fixed cylinder 1 is inserted into the hole from the bottom side, the flange 1c at the open end and the elastic claw 1 are inserted.
Hold the edge of the hole with d.

Clamping claw 3 around the pressure receiving surface 2a of the movable body 2.
9 is initially opened as shown in FIG. 9, but when the pressure body S pushes the pressure receiving surface 2a, the pressure body S is retracted into the collar 1c and bites the pressure body S as shown in FIGS. When the movable body 2 is pushed deep into the fixed cylinder 1 as shown in FIG. 5, the protrusion 11 on the bottom rotates the locking cam 10 on the side surface of the movable body 2. Therefore, when the pressing force of the pressurizing body S is eliminated, the movable body 2 is pushed back by the coil spring 13, and the locking cam 10 is projected on the inner wall of the fixed barrel 1.
It is caught by and is stopped (Fig. 6). Next, when the movable body 2 is pushed in again as shown in FIG. 7, the movement causes the locking cam 10 to rotate to the position shown in the figure. When the pushing is stopped, the movable body 2 is moved by the coil spring as shown in FIGS. It is pushed back and its claw 3
Is to go out of the collar 1c and release the pressurizing body S that has elastically opened and bite.

The fixed cylinder 1 of the embodiment shown in FIGS. 1 to 3 of the present invention has a cup-shaped rear portion 1a having a bottom and a cylindrical front portion 1b.
Are combined and integrated by the engagement of the claws 1 ′ and 1 ′. Although the movable body 2 has the sandwiching claws 3 as in the conventional case, the peripheral wall has left and right missing portions 6. The coil spring 7 that pushes the movable body 2 outward is a relatively large-diameter coil housed between the inner end 2b of the movable body 2 and the stepped portion or bottom of the fixed barrel 1. The shape of the lock cam 10 attached to the side surface of the movable body 2 is the same as the conventional one, but the conventional projections 11 and 12 for rotating the cam 10 are movable in the embodiment shown in FIGS. It is provided on the inner wall of the fixed cylinder 1 along the side surface of the body 2. Since it is the back side of FIGS. 1 and 2, it only appears in FIG. Even if the mounting positions of the protrusions 11 and 12 are changed, the operation is the same as that of FIGS. However, the lock mechanism is not limited to this, but is free.

In this embodiment, a pair of fixed conductors 4 are attached to the fixed cylinder 1 side, a short-circuit conductor 5 is fitted to the movable body 2 side and pressed by the coil spring 7. That is, as can be seen clearly in FIG. 1, the pair of fixed conductors 4 hooks the support ends 4a on the cutouts 8 at the left and right corners of the peripheral wall of the cup-shaped rear portion 1a of the fixed barrel 1 to contact the contact plate. 4b are arranged side by side on the wall so as to extend in the moving direction of the movable body, and the terminals 4c are penetrated and exposed outside the bottom. Each supporting end 4a is pinched and held by the projecting portion 9 of the front portion 1b when the tubular front portion 1b of the fixed cylinder is fitted to the rear portion 1a to be integrally assembled. The tubular front part 1b
Then, the rear portion 1a has the claws 1'which are engaged with each other when fitted together, and this maintains the assembled state. When the fixed cylinder 1 is rectangular as in this embodiment, the contact plates 4 of the pair of fixed conductors 4 are provided at both corners of the cup-shaped rear portion 1a which are not the sliding guide surfaces.
b can be arranged, and there is no risk of touching the coil spring 7, which is convenient.

On the movable body 2 side as well, a cutout portion 6 is provided in the peripheral wall in accordance with the position of the pair of fixed conductors 4, so that the sliding relationship between the peripheral wall of the movable body 2 and the inner wall of the fixed cylinder 1 is not impaired, and the moving operation is performed. The flat plate portion 5a which is the base portion of the short-circuit conductor 5 without hindering the contact, and the contact plates 4b of the fixed conductor from the left and right of the flat plate portion 5a,
The pair of elastic contact pieces 5b extend so as to be inclined in the direction of 4b. When the movable body 2 is pushed in, the elastic tips 5b 'of the elastic contact pieces 5b slidably contact the pair of contact plates 4b on the inner wall of the fixed barrel 1 by the elasticity of the contact pieces 5b themselves.
Each elastic contact piece 5b is composed of two pieces separated by a cut as shown in the drawing. Further, the coil spring 7 provided between the bottom of the cup-shaped rear portion 1a and the inner end 2b of the movable body 2 has a movable body end 2b.
It also has a role of directly or indirectly sandwiching the flat plate portion 5a of the short-circuit conductor applied to, but since it is only pushing so as not to separate, the small protrusion 5c of the flat plate portion 5a is inserted into the small hole 2c at the peripheral wall end The outer edge of the flat plate portion 5a contacts the end surface (inner end 2b) of the peripheral wall other than the missing portion of the movable body 2.

As shown in FIG. 2, when the pressure receiving surface 2a of the movable body 2 is pushed down by the pressure body S, the peripheral wall missing portion 6 of the movable body 2 has a pair of elastic contact pieces 5b short-circuited. The conductor 5 is lowered from the solid line position in FIG. 2 to the position 5 ′ shown by the chain line, and comes into contact with the contact plates 4b of the pair of fixed conductors 4. Thus, in this embodiment, when the movable body 2 is pushed in, that is, when the door is closed, the short-circuit conductor 5 comes into contact with the fixed conductor 4 to turn on the switch, and conversely, when the door is opened, a short circuit occurs. The working conductor 5 is separated from the fixed conductor 4, and the switch is turned off. Therefore, the circuit for supplying power when the door is closed may be connected to the terminal 4c of the fixed conductor. In the case of a lighting circuit that illuminates the inside when the door is opened, use a relay that turns it on by turning the switch off. Connect the circuit of this relay to terminal 4c, and turn the lighting circuit into a switch for the relay. Just connect.

Of course, the designs of the fixed conductor 4 and the short-circuit conductor 5 are changed so that the short-circuit conductor 5 separates from the fixed conductor 4 when the movable body 2 is pushed in, and conversely, the movable body 2 uses the coil spring 7. You may make it contact with the fixed conductor 4 when pushed up. Although the present invention has been described with reference to one embodiment, it is needless to say that the present invention can be variously changed and applied according to the implementation conditions without changing the gist of the invention, by a well-known technique of the designer. The fact that the fixed cylinder and the movable body are insulative does not limit the internal material, but means that the necessary surface is insulative.

[0013]

The present invention has developed a concept of integrating a relief latch and a detection switch, which have been completely separate from each other in the past, and showed a specific configuration thereof. The main part of the structure, except for the conductor, is insulative, and neither the contact plate of the pair of fixed conductors attached to the fixed cylinder side nor the short-circuit conductor attached to the movable body side interferes with the operation of the floating latch at all. , The left and right elastic contact pieces of the short-circuit conductor extending diagonally are short-circuited by the smooth sliding contact and separation operation,
I tried to shut off.

[Brief description of drawings]

FIG. 1 is an exploded explanatory view of an embodiment of the present invention.

FIG. 2 is an elevational view of the assembled state of FIG.

FIG. 3 is a sectional view taken along line XX in the assembled state of FIG.

FIG. 4 is a diagram illustrating a latch operation of a conventional technique.

FIG. 5 is a diagram illustrating a latch operation of a conventional technique.

FIG. 6 is a diagram illustrating a latch operation of a conventional technique.

FIG. 7 is a diagram illustrating a latch operation of a conventional technique.

FIG. 8 is a diagram illustrating a latch operation of a conventional technique.

FIG. 9 is a diagram illustrating a latch operation of a conventional technique.

[Explanation of symbols]

 1 Fixed tube 1a Cup-shaped rear part of fixed tube 1b Tube front part of fixed tube 2 Movable body 3 Clamping claw of pressurizing body 4 Pair of fixed conductors 4a Fixed conductor support end 4b Fixed conductor contact plate 4c Fixed conductor terminal 5 Short-Circuit Conductor 5a Short-Circuit Conductor Flat Plate Part 5b A Short-Circuit Conductor Pair of Elastic Contact Pieces 5b 'Tip of Elastic Contact Piece

Claims (1)

[Claims] 1. An insulative fixed cylinder having a bottom and a movable inner wall of the fixed cylinder, which is movable in an inward and outward direction, and is restrained when pushed deep against a coil spring, An insulating movable body that is released from the restraint when pressed, a holding claw around the pressure receiving surface at the outer end of the movable body, and a contact plate on the inner wall surface of the rear portion of the fixed cylinder that extends in the moving direction of the movable body. And a pair of fixed conductors, each of which is integrated with the contact plate, and whose respective terminals are out of the fixed cylinder, and a short-circuit conductor having a base engaging with the inner end of the movable body. Is an embossing latch with a switch, wherein each elastic contact piece which is in sliding contact with the contact plates of the fixed conductor when the movable body is pushed is extended obliquely toward the contact plate of the fixed conductor.