JPH112060A - Push latch device with switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a push latch device which can be fabricated at a low cost and can be easily assembled. SOLUTION: A push latch device fitted with a switch is composed of a slider 12 mounted movably fore and aft in a latch case 11 whose front is left open, an elastic member to energize the slider 12 forward, a means to restrict the advanced position of the slider 12, and a changeover means to change over the position of the slider 12 between the retreat position and advance position each time the slider 12 is pushed backward, wherein the switch means 30 is assembled in the latch case 11 and turned on and off through operation of the slider 12. the switch 30 is composed of a switch case 32 assembled in the latch caste 11, an operation part 31 provided integrally with the slider 12 and extending into the switch case 32, and a plurality of contacting pieces 35 and 36 which are changed over by the operation part 31 between the contacting condition and the non-contact condition.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push latch device which can be switched between an advanced position and a retracted position each time a push operation is performed, and more particularly to a push latch device provided with a switch for switching an electric circuit ON / OFF. To a push latch device with a switch.

[0002]

2. Description of the Related Art As a means for holding a door for an audio rack or a television stand or the like, or a cover for taking out and inserting a medium in a reproducing apparatus such as a compact disk or cassette tape, a casing having an open front surface, A slider which is assembled so as to be freely retractable in the casing, and position switching means for holding the slider so that the slider can be switched between a forward position protruding from the casing and a retracted position retracted into the casing every time the slider is pressed. A device incorporating a push latch device has been widely put into practical use. In recent years, a switch has been assembled to the push latch device, for example, in an audio rack or a TV stand, a light is turned on when a door is opened to enhance operability of devices in the rack, or a compact disk or cassette can be used. In a reproducing device such as a tape, a device configured to detect the opening or closing of a lid and use the detected device for controlling a drive system is being put into practical use. For example, 62-7
In Japanese Patent No. 5176, there is provided a switch in which a microswitch is assembled in a rear end portion of a casing and an operation portion of the microswitch is pushed and operated on a rear surface of the slider in a state where the slider is held at a retracted position. A push latch device is described. In addition, 7-14
No. 062 discloses that a pair of fixed contact pieces are fixed to the inner surface of a casing at a fixed interval, a movable contact piece is fixed to a slider, and the movable contact piece is moved to a retracted position so that the movable contact piece is fixed to both fixed contacts. A push-latch device with a switch is described in which both fixed contact pieces are brought into a conductive state upon contact with the piece.

[0003]

In the push latch device with a switch described in the former publication, a micro switch as a separate member is incorporated in the casing, so that the configuration of the push latch device is hardly changed. Since parts cannot be shared between the latch device and the microswitch, there is a problem that the manufacturing cost is increased. In addition, a coil spring or the like for urging the slider forward is mounted in the rear end of the casing, and a sufficient mounting space for the micro switch cannot be secured.
The operation of assembling the microswitch becomes complicated, and it is necessary to use an expensive microminiature switch.

On the other hand, in the push-latch device with a switch described in the latter publication, the number of components of the push-latch device can be reduced by using the slider and the coil spring of the push-latch device also as the operating portion and the spring member of the switch. Push latch device is 10 × 5 × 25
Since the casing and the slider are smaller because they are as small as about mm, the assembling work of the contact pieces becomes very complicated. In other words, although the number of parts can be reduced, there is a problem that the assembling work becomes complicated and the manufacturing cost of the push latch device eventually increases. In addition, since the movable contact piece is pressed against the two fixed contact pieces, there is a problem that the movement resistance of the slider increases, the operability of the slider decreases, and the durability of the push latch device decreases.

An object of the present invention is to provide a push latch device which can be manufactured at a low cost and can be easily assembled.

[0006]

According to the first aspect of the present invention, there is provided a push-latch device with a switch, comprising: a latch case having an open front surface; a slider movably mounted in the latch case in the front-rear direction; An elastic member that urges the slider, a forward position restricting means that regulates a forward position of the slider, and, each time the slider is pushed backward, a retracted position that is retracted into the latch case and a forward position that protrudes from the latch case. A position switching means for switching the position of the slider, and switch means mounted on the latch case and switched on / off by operation of the slider, wherein the switch case mounted on the latch case is provided integrally with the slider. And an operation unit extending into the switch case, and the operation unit switches between a contact state and a non-contact state. It is obtained by a switching means having a number of contact pieces.

The switch means of this push latch device is configured so that a plurality of contact pieces assembled in a switch case can be switched between a contact state and a non-contact state by an operation section integrally formed on a slider. Thus, the operating portion constituting the general switch and the spring member for returning the operating portion are shared by the slider and the elastic member of the push latch device, and the number of components of the push latch device is reduced accordingly. Also, since the switch case with a plurality of contact pieces is a member independent of the latch case, the switch case can be assembled to the rack case after the contact pieces are assembled to the switch case. The assemblability of the plurality of contact pieces to the case is improved, and the work of assembling the switch case to the lattice case does not become complicated.

As described in claim 2, the lower wall portion of the latch case is omitted, the side wall portion is extended downward, and switch means is assembled in the lower portion of the side wall portion, and the switch case is mounted on the upper wall portion of the switch case. Forming a guide hole extending in the front-back direction, forming an operating part that extends downward by inserting the guide hole into the slider, switching multiple contact pieces between contact state and non-contact state by operating part, and operating with the guide hole It is preferable to constitute a forward position restricting means for restricting the forward position of the slider with the portion.

According to this structure, since the outer peripheral portion of the switch case is held by the side wall of the latch case, it is possible to sufficiently secure the mounting strength of the switch means to the latch case. In addition, the switch means having the same configuration can be mounted on the push latch device of various forms in which the shape of the tip portion of the slider is changed, with almost no change in the configuration. The nature becomes high. Further, in a normal push latch device, as a forward position restricting means, a long hole or a groove is formed in the latch case, and a convex portion that fits in the long hole or the groove is formed in the slider. If a guide hole for moving the operation unit of the switch means is formed in addition to the long hole or the groove, the strength of the latch case is reduced or its manufacture is complicated. The guide hole and the operation unit constitute a forward position restricting means for restricting the forward position of the slider, and the guide hole of the switch means is also used as a long hole of the forward position restricting means, thereby preventing a reduction in the strength of the latch case. Becomes possible.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS.
A push latch device 1 includes a hook member 2 fixed to a door of furniture or a home appliance, and a push latch device main body 1 fixed to a wall 4 of furniture or a home appliance corresponding to the hook portion 3.
When the door is pushed from the open state to the closed position as shown in FIG. 2A, the hook member 2 is held by the push latch device main body 10 as shown in FIG. 2B. , The door is held in the closed position, and from this state again,
When the door is pushed, as shown in FIG. 2A, the hook member 2 is detached from the push latch device main body 10 and the door is slightly opened, so that the door can be smoothly opened. Things.

A push latch device main body 10 includes a latch case 11 having a front surface and a lower surface opened, and a latch case 11.
Slider 12 movably mounted in the front and rear direction
Each time the slider 12 is pushed backward, an elastic member 13 composed of a compression coil spring for urging the slider 12 forward, a forward position restricting means for regulating the forward position of the slider 12, and FIG. A position switching means 15 for switching the position of the slider 12 between a forward position protruding from the latch case 11 as shown in FIG. 2 and a retracted position immersed in the latch case 11 as shown in FIG. And a switch means 30 which is mounted inside and is turned on / off by operation of the slider 12.

A pair of left and right holding arms 16 extending forward are provided at the front end of the slider 12 so as to be rotatable. A holding portion engageable with the hook 3 of the hook member 2 is provided at the front end of the holding arm 16. A pressing portion 18 is formed between the holding arms 16 so that the slider 12 protrudes forward. When the slider 12 is moved to the retracted position, the two holding arms 16 are rotated around their base ends to be guided inside the latch case 11, and
In a locked state in which the hook portion 3 can be held between
When the slider 12 is operated to the forward position, the two holding arms 16 protrude out of the latch case 11 to increase the distance between the front ends of the two holding arms 16 due to the elasticity of the material, and the hook member 2 is released from the holding arms 16. Is unlocked. However, the holding arm 16 is formed of a separate member from the slider 12, and the slider 1 is connected via a pin member or the like.
2 may be rotatably mounted. Further, it is also possible to configure one of the holding arms 16 so as not to rotate.

The forward position restricting means for holding the slider 12 at the forward position will be described with reference to FIGS.
As shown in FIG. 4, on the lower surface of the slider 12, an operation portion 31 for regulating the forward position of the slider 12 and for turning on / off the switch means 30 as described later is formed so as to protrude downward. A guide hole 34 for guiding the operation unit 31 in the front-rear direction is formed in a lid member 33 of a switch case 32 described later.
And the forward position of the slider 12 is regulated.

The position switching means 15 for switching the position of the slider 12 between the forward position and the backward position will be described.
As shown in FIGS. 2 and 3, on the lower surface of the upper wall of the latch case 11, a second guide having a heart-shaped first guide protrusion 20 that contracts forward and a front end surface along the rear end surface are provided.
The guide projection 21 is formed to project downward at a predetermined distance back and forth. A substantially V-shaped locking groove 22 is formed between the two guide projections 20 and 21, and the slider 12
Is provided with a lever member 24 having an engaging portion 23 which is relatively movable along a substantially outer edge of the first guide projection 20.

The lever member 24 is rotatably attached to the slider 12 via a shaft portion 25 mounted in the vicinity of the front end of the slider 12 in the vertical direction.
An elongated flat surface is formed at the front end of the slider 12 in the vertical direction.
6 is pressed into contact with the inner surface of
It is constantly biased to the initial position shown in FIG. The push latch device main body 10 may be configured to hold the slider 12 at the retracted position by a combination of a heart-shaped guide groove and a lever member, or may be of another type. It is.

Next, the switch means 30 will be described. As shown in FIGS. 1, 3, and 4, the switch means 30 includes a switch case 32 having substantially the same shape as the latch case 11 in plan view, and a pair of contact pieces 35 and 36 attached to the switch case 32. And the square hole 37 of the latch case 11 is provided.
And the engaging projection 38 of the switch case 32 is engaged therewith, and is integrally assembled between the lower portions of the left and right side walls of the latch case 11. However, the external shape of the switch means 30 does not necessarily have to be the same as the shape of the latch case 11 in a plan view, and the switch means is configured to be assembled with a part of the lower wall portion of the latch case 11 left. You may.

The switch case 32 is divided into a case body 39 having an open upper surface and a cover member 33 for closing the upper surface of the case body 39.
3 is positioned and fixed via a pair of positioning pins 40. A guide hole 34 that is elongated in the front-rear direction is formed at the center in the width direction of the lid member 33, and the operation unit 31 extending from the slider 12 extends through the guide hole 34 into the switch case 32.

One set of contact pieces 35 and 36 is
The contact pieces 35 and 36 project rearward from the case body 39. In the case body 39, the contact pieces 35, 36 are bent once in the vicinity of the base end thereof, and then extend substantially in parallel to the front. A possible ramp 41 is formed. Then, when the slider 12 is moved to the retracted position, as shown in FIG. 4A, the operation section 31 moves rearward while sliding on the inclined section 41, and one of the contact pieces 35 bends. When the front ends of the contact pieces 35 and 36 come into contact with each other and the switch means 30 is turned on and the slider 12 is moved to the forward position, the operation section 31 is moved from one of the contact pieces 35 as shown in FIG. After separation, the contact piece 35 returns with its own elastic force, and the switch means 30
It is configured to be in the FF state. Reference numeral 42
Is a pressing protrusion for fixing the contact pieces 35 and 36, and reference numeral 43 is a regulating protrusion for restricting deformation of the other contact piece 36. However, it is also possible to provide three or more contact pieces 35 and 36 and to assemble the switch case 32 integrally with two sets of switches that are turned on at the forward position and the backward position of the slider 12, for example. . Also,
It is also possible to arrange the contact pieces 35 and 36 so that the contact pieces 35 and 36 are turned off when the slider 12 is moved to the retreat position and turned on when moved to the forward position.

Next, the operation of the push latch device 11 will be described. When the door is pushed rearward from the opened state of the door, and as shown in FIG. The portion 23 is guided along the inclined guide surface 20a of the first guide protrusion 20, and the lever member 24 rotates against the urging force of the elastic member 13 and is further moved rearward to incline the engaging portion 23. When detached from the guide surface 20a, the lever member 24 rotates by the urging force of the elastic member 13, and the engaging portion 23 is guided into the locking groove 22. On the other hand, the operation unit 31 moves rearward together with the slider 12, and as shown in FIG. 4A, one contact piece 35 is pressed toward the other contact piece 36, and the two contact pieces 35, 36 come into contact with each other. , The switch means 30 is turned on. When the hand is released in this state, the slider 12 is slightly moved forward by the urging force of the elastic member 13, and as shown in FIG.
2, the slider 12 is held at the retracted position, the hook member 2 is held by the holding arm 16, and the door is held at the closed position. At this time, the operation unit 31 advances slightly together with the slider 12,
The two contact pieces 35 and 36 are maintained in a contact state, and the switch means 30 is maintained in an ON state.

Next, the door is again pushed backward, and the slider 1 is pushed while pushing the pushing portion 18 at the rear end of the hook member 2.
2 is moved rearward, the lever member 24
3, the engaging portion 23 is disengaged from the locking groove 22 and is released in this state. As shown in FIG. 2A, the slider 12 is biased by the elastic member 13. Moves to the forward position, the holding arm 16 releases the hook member 2,
The door is unlocked. At this time, the operation unit 31 advances with the slider 12 and separates from the one contact piece 35, and the one contact piece 35 returns to the original posture, so that the tips of the two contact pieces 35 and 36 separate, Switch means 30
Is turned off. As described above, when the door is closed and the door is opened, the switch means 30 is turned on and the switch is turned off.
Since it switches to the F state, using this, for example,
The open / closed state of the door is detected.

Next, another embodiment in which the configuration of the push latch device main body 10 is partially changed will be described.
The same members as those of the above-described embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. (1) As in the push latch device main body 10A shown in FIG. 5, instead of the cylindrical operation portion 31, a side view trapezoidal operation portion 31A having an inclined surface 45 inclined upward and rearward at the rear portion.
In place of the contact pieces 35 and 36, the horizontally arranged contact pieces 35A and 36A are fixed to the rear wall of the case body 39 in a vertically shifted state, and both contact pieces 35A and 36
The middle part of A is extended to the center part side, and both contact pieces 35A, 3A
The first half of 6A may be arranged up and down at a fixed distance. In the push latch device main body 10A, as shown by a solid line in FIG. 5A, when the slider 12 is held at the retracted position, the upper contact piece 35A is pushed downward by the inclined surface 45, and the contact piece is pressed. The tip of 35A has a lower contact piece 36A.
When the slider 12 is held at the forward position as shown by the imaginary line in FIG. 5A, the inclined surface 45 is separated from the upper contact piece 35A. As a result, the contact piece 35A returns to its original shape due to its own elastic force, the contact piece 35A is separated from the contact piece 36A, and the switch means 30A is maintained in the cutoff state.

(2) The switch means 30 can be mounted on the side, upper part, or rear part of the latch case 11.
For example, when assembling the switch means 30B at the rear of the latch case 11B as in the push latch device 10B shown in FIG. 6, a through hole 50 is formed in the rear wall of the latch case 11B, and the through hole 50 is formed in the slider 12. An operation portion 31B that can be inserted through the hole 50 and protrudes rearward is formed. When the slider 12 is held at the forward position, the operation unit 31B moves into the latch case 11B,
When the distal ends of the set of contact pieces 35B and 36B are separated from each other and the slider 12 is held at the retracted position, the operation unit 31B protrudes into the switch case 32B and is pressed against one of the contact pieces 35B to be pressed. The contact pieces 35B and 36B may be configured so as to come into contact with each other to be in a conductive state.

In this embodiment, the push latch device 1 including the push latch device main body 10 and the hook member 2 is used.
The present invention is applied to the above, but a permanent magnet is attached to the slider 12 instead of the holding arm 16, and the hook member 2 is replaced with the permanent magnet.
The present invention can be similarly applied to a push latch device of a magnet type in which a metal plate is fixed to a door or a push latch device of another type.

[0024]

According to the push-latch device with a switch of the present invention, the operating part and the spring member constituting the switch are used for both the slider and the elastic member of the push-latch device, so that the components of the push-latch device are provided. Points can be reduced. In addition, since the switch case, in which the plurality of contact pieces are assembled, is made of a member independent of the latch case, the work of assembling the push latch device can be performed efficiently. A push latch device with a switch can be realized.

According to the second aspect of the present invention, it is possible to easily increase the strength of assembling the switch means to the latch case, and to improve the durability of the push latch device. In addition, the switch means having the same configuration can be mounted on the push latch device of various forms in which the shape of the tip portion of the slider is changed, with almost no change in the configuration. The nature becomes high. Further, the guide hole and the operating portion constitute a forward position restricting means for restricting the forward position of the slider, and the guide hole of the switch means is also used as a long hole of the forward position restricting means, thereby preventing a reduction in the strength of the latch case. It is possible to do.

[Brief description of the drawings]

FIG. 1 is a perspective view of a push latch device.

FIG. 2 is an operation explanatory view of a push latch device.

FIG. 3 is a longitudinal sectional view of a push latch device main body.

FIG. 4 is an explanatory view of the operation of the switch means.

FIG. 5 is an explanatory view of a push latch device body having another configuration.

FIG. 6 is an explanatory view of a push latch device main body having another configuration.

[Explanation of symbols]

Reference Signs List 1 push latch device 2 hook member 3 hook portion 4 wall portion 10 push latch device main body 11 latch case 12 slider 13 elastic member 15 position switching means 16 holding arm 17 holding portion 18 pressing portion 20 first guide protrusion 20a inclined guide surface 21 Second guide projection 22 Lock groove 23 Engagement part 24 Lever member 25 Shaft part 26 Mounting hole 30 Switch means 31 Operation part 32 Switch case 33 Lid member 34 Guide hole 35 Contact piece 36 Contact piece 37 Square hole 38 Engagement projection Part 39 Case main body 40 Positioning pin 41 Inclined part 42 Pressing convex part 43 Restriction projection 10A Push latch device main body 45 Inclined surface 31A Operation part 35A Contact piece 36A Contact piece 10B Push latch device main body 11B Latch case 30B Switch means 31B Operation part 35B Contact piece 36B Contact piece 50 Through hole

Claims (2)

[Claims] 1. A latch case having an open front surface, a slider mounted in the latch case movably in the front-rear direction, an elastic member for urging the slider forward, and regulating a forward position of the slider. Forward position restricting means, each time the slider is pushed backward, position position switching means for switching the position of the slider between a retracted position retracted into the latch case and a forward position protruding from the latch case, and the latch case A switch unit mounted on the latch case and being turned on / off by operating a slider; a switch case mounted on the latch case; an operation unit integrally provided on the slider and extending into the switch case; A plurality of contact pieces that are switched between a contact state and a non-contact state by the operation unit. And a push-latch device with a switch, comprising: 2. A guide hole extending in a front-rear direction in an upper wall portion of the switch case, while omitting a lower wall portion of the latch case, extending the side wall portion downward, assembling a switch means in a lower portion of the side wall portion. Forming an operating portion extending downward by inserting a guide hole into the slider, and switching a plurality of contact pieces between a contact state and a non-contact state by the operating portion,
A push latch device with a switch, comprising a forward position restricting means for restricting a forward position of a slider by a guide hole and an operation unit.