JP2001262915A - Latch device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a sufficient engaging force normally while prevent generation of damage when a strong external force is applied. SOLUTION: An engaging part 54 of an engaging member 50 is made to project under an engaging condition by means of a push spring 18 that pushes a moving element 30 to a projecting position from a push-in position through the engaging member 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an object to be locked by protruding an engaging portion of an engaging body from a moving member when the engaging member is in an engaged state and engaging the engaging portion with an object to be locked. The present invention relates to an improvement in a latch device which restricts relative movement of an object from moving while retracting and retracting the engagement portion inside the moving element when the device is in a released state.

[0002]

2. Description of the Related Art An example of this kind of prior art is disclosed in Japanese Utility Model Publication No. 7-40061. That is, in this prior art, the moving element is a housing (case).
When the movable member protrudes from the opening of the housing, the engaging portion of the movable member protrudes downward. It is designed to be retracted inside. A compression spring is interposed between the housing and the moving element, and a position determining means for the moving element formed by a combination of a sliding protrusion and a cam is provided. The compression spring presses the movable element against the housing in a direction in which the movable element always projects. The position defining means appropriately engages and disengages the sliding projection and the cam in accordance with the pushing operation of the movable element with respect to the housing, and a projecting position where the movable element is projected from the opening of the housing, a pushing position where the movable element is pushed into the housing, and It functions to alternately switch to. This housing is attached to a box body that is opened and closed by a door. On the other hand, a strike is attached to the inner surface of the door at a position corresponding to the housing.

In the prior art constructed as described above, when the door is closed when the movable member is in the protruding position, the movable member is pushed into the housing by the door, and is stopped at the pushed position by the action of the position defining means. I do. At this time, the engaging portion of the engaging body protrudes downward from the outer periphery of the lower part of the moving element, and the engaging portion is engaged with the strike of the door, and the door is kept closed. Can be.

On the other hand, when the door is further pressed in the direction to close the door from the above-described state, the movable member is returned to the projecting position by the operation of the position defining means, and the door moves in the opening direction. At that time, the engaging portion of the engaging body is retracted and stored inside the mover, and the engaged state with the strike is released, so that the door can be opened as it is.

[0005] According to this conventional technique, when the door is opened, the movable element is normally at the protruding position, and the engaging portion of the engaging body is retracted and stored in the movable element. Therefore, it is possible to prevent a situation in which the engagement portion of the engagement body is damaged by contact with another object, and there is no fear that the appearance is impaired.

[0006]

In the prior art described above, the engaging member is rotatably supported by the moving member, and the rear end of the engaging member is positioned in the guide groove of the housing. The rear end of the engaging body is moved up and down in accordance with a change in the position of the guide groove along with the movement of the moving element with respect to the housing, and the engaging portion is made to protrude and retract from the moving element. In other words, the rear end of the engagement body is always in contact with the guide groove of the housing, and the position of the engagement portion cannot be changed unless the mover is moved.

For this reason, when an excessive external force acts in the opening direction of the door when the engaging portion of the latch device and the strike of the door are engaged, the external force acts directly on the latch device and the strike, There is a possibility that the engagement portion may be damaged, such as being broken.

In order to prevent such a situation, it is conceivable that the engaging body is made of a material which is easily elastically deformed. That is, the engagement body is elastically deformed to absorb an external force and to prevent the latch device and the strike from being damaged. However, in a latch device that employs an engagement body that is easily elastically deformed, it is difficult to secure a sufficient engagement force between the engagement portion of the latch device and the strike of the door even in a normal state. This will cause the door to open.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a latch device capable of securing a sufficient engagement force in a normal state and preventing damage when an excessive external force is applied. And

[0010]

In the invention according to claim 1 of the present application, when in the engaged state, the engaging portion of the engaging body is projected from the mover, and the engaging portion is engaged with the object to be locked. A latch device that controls relative separation movement from the object to be locked by engaging with a stopper, while retracting the engagement portion inside the mover when in a released state. In the above, when in the engaged state, the engaging portion is made to protrude retreatably with respect to the mover.

In the invention according to claim 2 of the present application, the movable element is provided so as to be capable of moving forward and backward with respect to the housing, and the movable element is provided in such a manner that an engaging portion provided at a tip portion protrudes and retracts from the outer periphery of the movable element. An engaging member movably supported by the movable member; and an engaging portion of the engaging member protruding from the movable member when the movable member moves to a predetermined first position, thereby engaging the movable member. Actuating means for retracting and retracting the engaging portion of the engaging body inside the mover when the member is moved to a predetermined second position, and disengaging the engaging portion. In the latch device, which is configured to restrict the relative separation movement from the locking target by engaging with the locking tool of the locking target, the operating means may be configured such that when the engaging state is established, The joint that projects so that it can retreat with respect to the mover It is use.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the engaging portion projects from the movable element in the engaged state by the elastic restoring force of the elastic means. I try to make it.

According to a fourth aspect of the present invention, in the second aspect of the present invention, the movable element is interposed between the housing and the engaging body, and the movable element is moved from the first position through the engaging body. A pressing spring that constantly presses the moving element toward the second position, and moves the moving element to the first position when the moving element is pressed from the second position to the first position against the pressing force of the pressing spring. And a position defining means for returning the movable element to the second position by the pressing force of the pressing spring when pressed in the same direction from the first position, further comprising a pressing force of the pressing spring. Thereby, in the engaged state, the engaging portion projects from the movable element.

According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the engagement portion of the engagement body is provided with the engagement portion protruding. When the movable element and the object to be locked, which are separated from each other, are moved close to each other, they come into contact with the locking tool, and when they are pressed against the locking tool, the engaging portion of the engaging body is moved backward. A regression action surface is provided.

In the invention according to claim 6 of the present application, in the invention according to any one of claims 2 to 5 described above, the engaging body is moved along the moving direction of the moving element with respect to the moving element. It is arranged to be movable.

In the invention according to claim 7 of the present application, in the invention according to any one of claims 1 to 6, at least one of the moving element and the engaging portion of the engaging body is A first operating surface for urging the engaging portion of the engaging body in a protruding direction when the two members are pressed against each other in a state where the moving member protrudes; A second operating surface is provided for retreating the engaging portion of the engaging body against the urging force of the first operating surface when pressed against the locking member from a state of being engaged with the locking member of the object. Like that.

According to an eighth aspect of the present invention, in the invention according to any one of the first to seventh aspects, the release mechanism is provided by a guide mechanism provided between the engagement body and the housing. When in the state, the engaging portion is retracted and stored with respect to the mover.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments. FIG. 4 conceptually shows one embodiment of the latch device according to the present invention.
The latch device 1 exemplified here is applied to, for example, a cabinet C provided with a door (an object to be locked) B which is opened and closed by a hinge A, as shown in FIG.
0, a mover 30 and an engagement body 50.

As shown in FIGS. 3 to 5, the housing 10 is a block-shaped member having both upper ends protruding sideways, and is formed of a synthetic resin such as polyacetal (POM). The housing 10 has screw insertion holes 11 formed in portions extending laterally along the vertical direction, and a locate pin 12 protrudes from the rear end.

The housing 10 has a sliding hole 13 at its lower end. The sliding hole 13 has a rectangular cross section, and has one end opened at the front surface 10 a of the housing 10 and the other end closed by a rear wall 10 b of the housing 10. This sliding hole 1
3, a spring support pin 14, a lever support portion 15, a guide hole 16 for a stopper, and a guide rib 17 are provided.

The spring support pin 14 is a cylindrical portion provided on the inner surface of the rear wall 10 b of the housing 10, and projects from a position below the axis of the slide hole 13 toward the opening of the slide hole 13. It is set up. This spring support pin 14 has
A pressing spring 18 is mounted on the outer peripheral portion. Press spring 1
Reference numeral 8 denotes a metal coil spring having a sufficient length than the spring support pin 14 in a normal state.

The lever support portion 15 is a portion for supporting the cam lever 19, and is provided at a position above the spring support pin 14 on the rear wall 10b of the housing 10. The cam lever 19 includes a base 19a and a pair of arms 19b.
And are integrally formed by a metal wire.
The base 19a is a portion extending linearly, and
3 has a length slightly shorter than the width. The pair of arms 19b are portions that extend at right angles from both ends of the base 19a in the same direction. The distal ends of the arms 19b are bent inward at right angles to each other to form cam followers 19c. The cam lever 19 is supported on the lever support 15 via a base 19a in a state where the pair of arms 19b is directed in the opening direction of the slide hole 13, and each pair of arms 19b is supported by the base 19a as a fulcrum. It can swing up and down.

The stopper guide hole 16 is a narrow notch provided in the upper wall 10c and the bottom wall 10d of the slide hole 13,
The portions facing each other extend along the extending direction of the sliding hole 13. The guide holes 16 for the stoppers are provided on the upper wall 1.
0c and the bottom wall 10d, and constitutes a stopper surface 20 at each front end. It should be noted that reference numeral 2 in FIG.
1 is an introduction guide groove provided on the inner surface of the upper wall 10c and the inner surface of the bottom wall 10d. Each of the introduction guide grooves 21 is provided with a corresponding one of the stopper guide holes 16 on the opening side of the slide hole 13.
, And each rear end is gradually curved inward toward the back.

The guide ribs 17 are portions of the left and right walls 10e and 10f of the sliding hole 13 projecting inward from the respective inner surfaces. Each guide rib 17 has a storage defining portion 17a and an inclined portion 17b, and is provided at a position closer to the sliding hole 13 than the projecting end of the spring support pin 14 on the opening side. The storage defining portion 17a extends along the axis at a position below the axis of the sliding hole 13, while the inclined portion 17b extends rearward from the rear end of each storage defining portion 17a. It continues so that it may incline gradually upward.

Reference numeral 22 in the figure denotes a sliding rib provided on the inner surface of the upper wall 10c and the inner surface of the bottom wall 10d. Although not shown in the drawing, each sliding rib 22 is a plurality of convex portions having a semicircular cross section with a small diameter,
Extend along the axis of Reference numeral 23 in the figure
Are slide guides provided on the left and right walls 10e and 10f of the slide hole 13. Each slide guide 23 has a larger projection width than the guide rib 17 and a slide hole 13 at a position below the storage defining portion 17 a of each guide rib 17.
Extend along the axis of

As shown in FIGS. 1, 3, 4 and 6, the moving element 30 is generally formed with a sliding hole 1 of the housing 10.
3 is a quadrangular prism-shaped member having a cross-section that can be fitted to 3, and is formed of a synthetic resin such as polyamide (PA66). The length of the moving element 30 is larger than that of the sliding hole 13 so that the front end of the moving element 30 is exposed to the outside even when the moving element 30 is pushed into the sliding hole 13 of the housing 10.

The movable member 30 has a storage recess 31 and a spring insertion hole 32 therein.

The storage recess 31 is a recess formed from the lower surface of the front end of the moving member 30. The inner surface of the front wall of the storage recess 31 is
The lower end portion thereof is slightly inclined gradually downward and forward, and constitutes a moving element side first working surface 31a.

The spring insertion hole 32 extends from the rear end face of the movable element 30 along the axial direction thereof, and has a front end communicating with the above-mentioned storage recess 31. This spring insertion hole 32
It has an inner diameter larger than the outer diameter of the pressing spring 18 mounted on the spring support pin 14 of the housing 10, and is provided at a position corresponding to the spring support pin 14.

The movable member 30 has a stopper claw 3
3. A relief groove 34, a bearing hole 35, and a cam mechanism 36 are provided.

The stopper claws 33 are portions protruding from the upper surface and the lower surface of the movable member 30, respectively. Each stopper claw 33 is provided at a position corresponding to the stopper guide hole 16 of the housing 10, and each front end face 37 extends in a right angle direction, while each rear end face gradually inwards toward the rear. It is curved.

The escape groove 34 is a recess formed at a position extending from the rear end of the movable member 30 to both side surfaces thereof. The relief groove 34 receives the guide rib 17 and the slide guide 23 provided on the housing 10 and receives the slide hole 13 of the movable member 30. This allows insertion into the Each clearance groove 34 has a relatively wide vertical width at its rear end 34a for receiving both the guide rib 17 and the slide guide 23, while its front end 34b receives only the storage defining portion 17a of the guide rib 17. It has a relatively narrow upper and lower width. Each of the escape grooves 34 is formed to have a length larger than that of the spring insertion hole 32, and each front end 34 b is formed in the storage recess 3.
It communicates with 1.

The bearing hole 35 is a long hole extending along the axial direction of the moving element 30, and is formed on both side surfaces of the moving element 30 below the front end 34 b of the escape groove 34. . Each bearing hole 35 penetrates both walls of the mover 30 and communicates with the above-described storage recess 31.

The cam mechanism 36 is provided with the cam lever 1 described above.
A series of groove cams provided to guide the 9 cam followers 19c are provided above the clearance grooves 34 on both side surfaces of the movable member 30. Each cam mechanism section 36 has trapezoidal cam sections 38a, 38b and heart-shaped cam sections 39a, 39b having different shapes on the left and right, respectively. These cam sections 38a, 38b, 39a, 39b, the cam lever 19, The stop position of the movable element 30 with respect to the housing 10 is defined by cooperation with the above-described pressing spring 18.

Reference numeral 40 in the figure denotes an introduction tapered surface provided below the bearing hole 35. Each introduction taper surface 40
Are inclined surfaces formed from both sides of the lower surface of the moving element 30 toward the storage concave portion 31, and are gradually inclined inward upward.

The engaging body 50 has a main portion 51 and a pair of arm portions 52 as shown in FIGS. 3, 4 and 7, and is integrally formed of a synthetic resin such as polyacetal (POM). It is.

The main portion 51 of the engaging body 50 is configured to be sized to be accommodated in the accommodating recess 31 of the moving element 30 and has a spring seat 53 and an engaging portion 54. The spring receiving seat 53 is a trapezoidal portion for the distal end of the pressing spring 18 mounted on the spring support pin 14 of the housing 10 to abut, and protrudes rearward from the rear end surface of the main portion 51.
The spring receiving seat 53 is further provided with a spring receiving pin 55. The spring receiving pin 55 is a portion that protrudes from the spring receiving seat 53 in a truncated cone shape, and its axis is located above an axis of a shaft portion 56 described later.

The engaging portion 54 is a portion protruding downward at a substantially right angle from the front end of the main portion 51. Engaging portion 54
The upper front end portion is gradually inclined slightly downward toward the front with respect to the lower surface of the main portion 51, and constitutes the engagement body side first working surface 54a. The inclination angle θ1 of the engagement member side first operation surface 54a is substantially the same as the above-described inclination angle θ2 of the mover side first operation surface 31a.

The lower portion of the front end of the engaging portion 54 is gradually curved rearward downward and forms a retreating surface 54b. Further, the lower portion of the rear end of the engaging portion 54 is gradually inclined downward and forward, and forms an engaging body side second operating surface 54c. The inclination angle θ3 of the engagement body-side second operation surface 54c is formed to be larger than the above-described inclination angle θ1 of the engagement body-side first operation surface 54a.

As is clear from FIGS. 4 and 7, the main portion 51 and the engaging portion 54 of the engaging body 50 are formed with sufficient thickness and width so that they are not easily elastically deformed. It is.

On the other hand, the arm portions 52 of the engagement body 50 are portions extending in parallel from the rear end of the main portion 51 toward the rear. Each arm 52 has a guide pin 57 on the outer surface of the rear end and a shaft 56 on the outer surface of the base. Guide pin 57
Are projecting portions in the shape of a column, and are formed such that the distance between the distal end surfaces thereof is greater than the distance between the guide ribs 17 provided on the housing 10. The shaft 56 is
It is a cylindrical portion having an outer diameter that is the same as the vertical width of the bearing hole 35 provided in the mover 30. Each shaft portion 56 is configured such that the distance between the end surfaces thereof is larger than the width of the storage recess 31 provided in the movable member 30 and slightly smaller than the width of the movable member 30. An inclined surface 58 is provided on each of the protruding ends of the shaft portions 56 at their upper portions.

Reference numeral 59 in the drawing denotes a support base provided on the lower surface of the main part 51. The support pedestal portion 59 is a portion protruding downward in a pedestal shape, and has a protruding end surface extending in parallel with the lower surface of the main portion 51.

The three components of the housing 10, the moving member 30, and the engaging member 50 configured as described above are assembled with each other according to the following procedure to configure the latch device 1 of the present embodiment.

First, as clearly shown in FIGS. 1 and 3,
Each of the pair of arm portions 52 is projected from the storage recess 31 to the outside through a communication portion with the escape groove 34, and the main portion 51.
Are stored in the storage recesses 31, and each shaft 5
By inserting 6 into bearing hole 35, engaging body 50 is mounted on mover 30. Thereby, the pair of arm portions 52
Are located in the escape grooves 34 of the mover 30, respectively.
Each guide pin 57 is projected outwardly, the spring receiving seat 53 is opposed to the spring insertion hole 32 of the moving member 30, and the spring receiving pin 55 is connected to the spring insertion hole 32.
Will be inserted into the front end of the. In the case of the above-described operation, the inclined surfaces 58 of the shaft portions 56 respectively match the introduction tapered surfaces 40 of the mover 30, and the shaft portions 56 are inserted into the bearing holes 35 by the action of the inclined surfaces that come into contact with each other. Work can be performed easily.

In this state, it is possible to rotate the engaging body 50 around the axis of the shaft portion 56 with respect to the movable member 30. For example, as shown in FIG. , While the engaging portion 54 can protrude downward from the outer periphery of the lower part of the mover 30, as shown in FIG.
When rotated clockwise, the engagement member 5 including the engagement portion 54 is rotated.
0 main part 51 can be housed in the housing recess 31 of the moving element 30. In this case, the pair of arms 52 swings with the rotation of the engagement body 50, and the rotation range is regulated by the above-described guide pin 57 and the escape groove 34.

The engaging member 50 attached to the moving element 30
The position of the shaft portion 56 can be appropriately changed inside the bearing hole 35, and by moving along the axial direction of the mover 30, the position of the shaft portion 56 can be changed with respect to the mover-side first working surface 31 a. The united side first working surface 54a can be moved toward and away from the united side. In this case, as is clear from FIGS. 1 and 2, the engaging body side first working surface 54 a is moved to the mover side first working surface 3.
1a, the shaft 5 of the engagement body 50
6 does not come into contact with the end of the bearing hole 35.

Next, the moving element 30 with the engaging body 50 mounted thereon
Is inserted into the sliding hole 13 of the housing 10 from the rear end side, and the pair of stopper claws 33 are arranged in the corresponding guide holes 16 for stopper. In this case, the engagement body 50 is held in a state of being rotated clockwise with respect to the movable element 30,
The guide pins 57 provided on the respective arm portions 52 are passed under the guide ribs 17, respectively. Further, the engaging body 5 is attached to the distal end of the pressing spring 18 through the spring insertion hole 32 of the movable element 30.
The zero spring receiving pin 55 is inserted, and the distal end surface of the pressing spring 18 is brought into contact with the spring receiving seat 53. Further, the cam lever 19
The cam followers 19c are positioned on the cam mechanism 36 of the mover 30, respectively. In the case of the above-described operation, the stopper claw 33 coincides with the introduction guide groove 21, and the operation can be easily performed by the action of the curved surfaces that come into contact with each other.

In this state, the moving element 30 is constantly pushed out of the housing 10 through the engaging body 50 by the pressing force of the pressing spring 18, and as shown in FIG. Of the movable member 30 comes into contact with the stopper surface 20 of the stopper guide hole 16, thereby defining a position (second position) where the movable member 30 protrudes from the housing 10.

At this time, as shown in FIG. 2A, the guide pins 57 provided on the pair of arm portions 52 abut against the storage defining portions 17a of the guide ribs 17, respectively.
The engaging body 50 rotates clockwise in the drawing, and the engaging portion 54 is held in a state of being housed in the housing recess 31 of the moving element 30.

On the other hand, from the above-mentioned state, the moving element 30 is moved against the sliding hole 13 of the housing 10 against the pressing force of the pressing spring 18.
, The individual cam followers 19c move along the cam mechanism 36 while the cam lever 19 swings appropriately,
It comes to be located above the trapezoidal cam portions 38a and 38b.

During this time, the guide pin 57 of the arm portion 52 of the engaging body 50 passes through the storage defining portion 17a of the guide rib 17 as the moving member 30 is pushed, and the inclined portion 17b
, And the clockwise rotation of the engagement body 50 is permitted. Here, the above-described pressing spring 1
8 presses the engaging body 50 above the shaft portion 56 which is the center of rotation of the engaging body 50. As a result, the engaging member 50 rotates counterclockwise by the pressing force of the pressing spring 18, and the engaging portion 54 of the engaging member 50 is moved to the lower outer periphery of the movable member 30 as shown in FIG. From the bottom. Also, at this time, the engaging body 50 is in a state of being advanced with respect to the movable element 30 by the pressing force of the pressing spring 18, and the engaging body side first working surface 5
4a is pressed against the moving element side first working surface 31a provided on the moving element 30.

When the pushing force applied to the moving element 30 is removed from the above-described state, the moving element 30 moves again in the direction of protruding from the housing 10 by the pressing force of the pressing spring 18. However, with the movement of the movable member 30 with respect to the housing 10, the trapezoidal cam portions 38a, 38
The cam follower portion 19c of the cam lever 19 located above the cam lever 8b moves to the recess of the heart-shaped cam portions 39a and 39b, respectively, and the guide pin 57 of the arm portion 52 is moved to the guide rib 17 as shown in FIG. The movement of the movable element 30 is prevented in a state before reaching the storage defining portion 17a. As a result, the moving element 30 is
3, the engagement portion 54 of the engagement body 50 is held at the push-in position (first position), and is held in a state of protruding from the outer periphery of the lower part of the moving member 30.

Further, the movable element 30 is again moved from the above-described state.
Is pushed into the sliding hole 13 of the housing 10, the cam followers 19c of the cam lever 19 deviate from the depressions of the heart-shaped cams 39a and 39b and are positioned below the inclined surfaces of the trapezoidal cams 38a and 38b. As a result, when the pressing force applied to the moving element 30 is removed, the moving element 30 is now moved by the pressing force of the pressing spring 18 to the housing 10.
, And returns to the above-described projecting position.

During this time, the guide pin 5 of the arm portion 52 of the engaging body 50 is moved with the movement of the movable element 30 in the protruding direction.
7 comes into contact with the guide rib 17 and reaches the storage defining portion 17a via the inclined portion 17b, so that the engagement portion 54 of the engagement body 50 is stored in the storage recess 31 of the movable member 30 again as shown in FIG. It will be in the state that was done.

Hereinafter, by repeating the above-described pressing operation, the movable member 30 can be alternately switched with respect to the housing 10 between the projecting position and the pushing position.

When the latch device 1 configured as described above is applied to the cabinet C, first, as shown in FIG. 9, the latch device 1 is attached to the main body of the cabinet C, for example, the lower surface of the upper wall D of the main body. Attach. In this case, FIG.
As shown in (a), it is preferable to attach the latch device 1 so that the front surface 10a of the housing 10 matches the front surface of the main body upper wall D. In the above-described operation, a positioning hole E is provided in advance on the lower surface of the main body upper wall D, and after the locating pin 12 of the housing 10 is fitted into the positioning hole E, a screw ( (Not shown) can be easily performed.

On the other hand, on the door B of the cabinet C, a locking member 60 is attached to a portion facing the latch device 1 on the inner surface. In the present embodiment, the one shown in FIG.

That is, the locking member 60 is a plate-shaped member having a locking insertion hole 61 at the center and screw insertion holes 62 on both sides thereof, and is made of synthetic resin such as polyamide (PA66). It has been molded. The locking insertion hole 61 is formed in a rectangular shape large enough to fit the above-described distal end of the moving member 30, and the rear portion thereof has a rear wall 61.
It is closed by a. The depth of the locking insertion hole 61 is such that the movable element 30 is inserted and its front end face 37 is attached to the rear wall 61a.
When the contact member 5 is brought into contact with
The length of the engaging portion 54 is just long enough to be located inside the locking insertion hole 61.

The locking member 60 has a locking insertion hole 6.
1 is provided with a locking recess 63 in the lower wall. Lock recess 63
Is provided for forming a locking step 64 at the front edge of the locking insertion hole 61, and has a size that allows the engagement portion 54 of the engagement body 50 to be inserted into the depth of the locking insertion hole 61. It is formed to have The locking step portion 64 has a portion facing the locking concave portion 63 inclined gradually downward toward the lower side, and forms a locking tool-side second working surface 64a. This locking tool side second working surface 6
The inclination angle .theta.4 of 4a is substantially the same as the inclination angle .theta.3 of the second engaging surface 54c provided on the engaging portion 54.

In addition, on the periphery of the opening of the locking insertion hole 61,
An R portion 65 is provided over the entire circumference.

The locking member 60 has a recess F formed on the inner surface of the door B, and a screw (not shown) through a screw insertion hole 62 with the rear wall portion of the locking insertion hole 61 disposed in the recess F. ) Is attached to the inner surface of the door B.

Now, in the above-described cabinet C,
While the door B is open, the moving member 30 of the latch device 1
Is projected, that is, the movable element 30 is at the above-mentioned projected position.

In this state, the engaging portion 54 of the engaging body 50 is housed in the housing recess 31 of the moving member 30 as described above. Therefore, the engagement portion 54 of the engagement body 50
Can be prevented from being damaged by contact with other objects, and there is no fear that the aesthetic appearance of the cabinet C is impaired.

When the door B is closed from this state, the front end face 37 of the moving element 30 is pressed by the rear wall 61a of the locking member 60 soon. When the cabinet B is closed by further closing the door B from this state, the movable member 30 is held at the above-mentioned pushing position, and the engaging portion 54 of the engaging body 50 protruding from the lower outer periphery of the movable member 30 is moved. Locking tool 60
Is located in the locking concave portion 63 of the second member.

In this state, as shown in FIG. 1A, the rear end face of the engaging portion 54 of the engaging body 50 and the locking tool side second operating surface 64a of the locking step 64 of the locking tool 60.
Are opposed to each other, and the opening movement of the door B with respect to the cabinet C is restricted, so that the door B can be held in a closed state.

On the other hand, if the door B is pressed further in the closing direction from the above-described state and the pressing force is removed thereafter, the movable member 30 returns to the protruding position, and the engaging portion 54 of the engaging body 50 moves As a result, the door B of the cabinet C can be opened.

By the way, in the above-described latch device 1, if the movable member 30 is directly pushed in by hand, the engaging portion 54 of the engaging body 50 projects from the movable member 30 when the door B is opened. There is a possibility that an object to be put in and taken out of the cabinet C may come into contact with the engaging portion 54.

However, according to the latch device 1, when the movable member 30 is at the pushing position, the engaging portion 54 of the engaging body 50 protruding from the lower periphery of the movable member 30 is pressed by the pressing force of the pressing spring 18. It is just being pressed.
That is, when an external force is applied to the engaging portion 54 of the engaging body 50 at the pushing position, the engaging portion 54 moves backward toward the storage recess 31 of the movable member 30 against the pressing force of the pressing spring 18. It is possible. Therefore, even when an object comes into contact with the engagement portion 54, the impact force can be greatly reduced, and there is no possibility that the latch device 1 may be damaged. In this case, the engaging body 50 is formed inside the bearing hole 35 by the shaft portion 56.
Can be moved along the moving direction of the moving element 30 by appropriately changing the position of the moving element 30. Therefore, there is no fear that the external force concentrates on the small cross-sectional area portion of the shaft portion 56 of the engagement body 50, which may be damaged.

In addition, according to the latch device 1, the retreating surface 54 is provided on the lower portion of the front end of the engaging portion 54, that is, on the portion that comes into contact with the locking member 60 when protruding from the movable member 30.
b. Therefore, when the door B is closed from the above-mentioned state, the locking member 60 comes into contact with the retreating operation surface 54b, so that the engaging portion 54 temporarily resists the pressing force of the pressing spring 18 to move the movable member 30. After that, the engaging portion 54 projects again when the locking step 64 of the locking tool 60 passes. That is, if the door B is closed without returning the movable member 30 of the latch device 1 to the projecting position, the door B can be maintained in the closed state, which is excellent in operability. In addition,
In this case, it is needless to say that there is no possibility that the latch device 1 may be damaged.

Further, in the latch device 1, when an external force is applied to the door B from the state in which the door B is closed to open the door B, the locking step 64 of the locking member 60 causes the engaging member 5 to move.
0 of the engaging member 50 of the engaging body 50.
4 is sandwiched between the locking member 60 and the mover 30.

In this state, there is no fear that the engaging portion 54 of the engaging body 50 is deformed such as bending. In addition, the engagement body 5
A first engagement surface 54a provided on the engagement portion 54 of the first engagement member 54;
The mover-side first working surface 31a provided on the mover 30 is pressed against each other, and the force in the direction of causing the engaging portion 54 to protrude from the mover 30 by the tilting action of the first working surfaces 54a, 31a. Will work. Further, since the front end of the movable element 30 is fitted into the locking insertion hole 61 of the locking tool 60, the locking tool 60 does not escape downward with respect to the latch device 1. Therefore, a high engaging force can be obtained between the latch device 1 and the locking member 60, and it is possible to prevent the door B from being opened carelessly.

On the other hand, if an excessive external force is applied to the door B from the above-described state, the locking member-side second operating surface 64 a provided on the locking step 64 of the locking member 60 and the engaging member 50
Of the movable member 30 by the tilting action of the first working faces 54a and 31a due to the tilting action with the engaging body side second working face 54c provided on the engaging portion 54. 31, the engagement between the latch device 1 and the locking member 60 is released.
There is no risk of damage to the device.

In the above-described embodiment, the latch device applied to the cabinet having the door is exemplified. However, if the latch device is used to restrict the relative movement from the object to be locked, the cabinet is not necessarily used. It is not limited to. In this case, the manner of movement of the locking target does not need to be hinged. Further, the specific material names of the latch device and the locking tool described in the above-described embodiment are merely examples, and they may be formed of other materials. Further, the mounting mode of the latch device is not limited to the above-described embodiment, and the engaging portion of the engaging body may be projected from the outer periphery other than the lower portion.

Further, in the above-described embodiment, the engaging portion of the engaging member is made to protrude from the movable member so as to be able to retreat using the pressing force of the spring. However, it is not always necessary to use the pressing force of the spring. There is no. For example, in the case of the above-described embodiment, by appropriately adjusting the position of the center of gravity of the engaging body and the position of the shaft portion, the engaging body can be protruded retreatably with respect to the moving element by the action of gravity. is there. Alternatively, the elastic restoring force of an elastic means other than a spring may be used.
In the above-described embodiment when the pressing force of the spring is used, the pressing spring for constantly pressing the moving member against the housing is also used as the pressing spring, which is advantageous in terms of the number of parts. However, for example, a spring may be separately provided between the mover and the engagement body.

Further, in the above-described embodiment, the engagement member is moved in the direction of advance and retreat with respect to the movable member by the elongated bearing hole and the shaft portion inserted therein. Of course, the engaging body may be moved with respect to the moving member by other methods such as. In addition,
In the above-described embodiment where the long hole-shaped bearing hole and the shaft portion are applied, the former is provided on the moving element and the latter is provided on the engagement body, but the reverse mode may be adopted.

Further, in the above-described embodiment, the first working surfaces are provided on both the moving element and the engaging portion of the engaging body, but may be provided on either one of them. Further, although the second working surface is also provided on the locking member, the same working effect can be expected even if the second working surface is provided only on the engagement portion of the engagement body.

[0077]

As described above, according to the present invention,
When the engaging portion is in the engaged state, the engaging portion is made to protrude so as to be able to retreat with respect to the moving element, so that the engaging body does not need to be made of a material which is easily elastically deformed. As a result, while a sufficient engaging force can be normally secured, when an excessive external force is applied, the engaging portion moves backward to prevent the damage.

[Brief description of the drawings]

FIG. 1 shows an embodiment of a latch device according to the present invention, in which (a) is a partially cutaway sectional view in an engaged state;
(B) is a sectional side view when in an engaged state.

FIG. 2A is a partial cross-sectional view in a released state, and FIG. 2B is a cross-sectional side view in a released state.

FIG. 3 is a bottom half sectional view showing a state in which a moving element of the latch device shown in FIG. 1 is taken out of a housing.

FIG. 4 is an exploded perspective view of the latch device shown in FIG.

5A is a front view of a housing, and FIG. 5B is a cross-sectional side view thereof.

6A is a side view of the moving element, FIG. 6B is a plan view thereof, FIG. 6C is a half sectional front view thereof, and FIG. 6D is a VI view of FIG.

7 (a) is a side view of the engagement body, and FIG. 7 (b) is a VII view of FIG. 7 (a).

FIG. 8A is a front view showing an embodiment of a locking tool provided on an object to be locked, and FIG. 8B is a sectional side view thereof.

FIG. 9 is a perspective view showing an application example of the latch device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Latch device 10 Housing 10a Front surface 10b Rear wall 10c Top wall 10d Bottom wall 10e, 10f Left and right wall 11 Screw insertion hole 12 Locate pin 13 Sliding hole 14 Spring support pin 15 Lever support part 16 Stopper guide hole 17 Guide rib 17a Storage regulation part 17b Inclined portion 18 Press spring 19 Cam lever 19a Base 19b Arm 19c Cam follower 20 Stopper surface 21 Introductory guide groove 22 Sliding rib 23 Slide guide 30 Mover 31 Storage recess 31a Mover side first working surface 32 Spring insertion hole 33 Stopper Claw 34 Escape groove 34a Rear end 34b Front end 35 Bearing hole 36 Cam mechanism 37 Front end 38a, 38b Trapezoidal cam 39a, 39b Heart-shaped cam 40 Introduced tapered surface 50 Engagement body 51 Main part 52 Arm part 53 Spring Receiving seat 54 Engaging part 54 a first engaging surface on the engaging body side 54b retreating operating surface 54c second engaging surface on the engaging body side 55 spring receiving pin 56 shaft portion 57 guide pin 58 inclined surface 59 support pedestal portion 60 locking member 61 locking insertion hole 61a rear wall 62 Screw insertion hole 63 Locking recess 64 Locking step 64a Locking tool side second working surface 65R part A Hinge B Door C Cabinet D Main body upper wall E Positioning hole F Recess

Claims (8)

[Claims] When the engaging portion is in an engaged state, the engaging portion of the engaging body protrudes from the movable element, and the engaging portion is engaged with the locking member of the locking object, thereby making the locking object and the locking object movable. A latch device for restricting the relative separation movement of the latching device while retracting the engaging portion inside the movable element when in the released state, wherein the engaging portion is in the engaged state. The latch device is configured to protrude reciprocally with respect to the mover. 2. A movable member disposed to be able to advance and retreat with respect to a housing, and an engaging member movably supported by the movable member such that an engaging portion provided at a distal end protrudes and retracts from an outer periphery of the movable member. And when the movable element is moved to a predetermined first position, the engaging portion of the engagement body is protruded from the movable element to be in an engaged state, while the movable element is moved to a predetermined second position. Operating means for retracting the engaging portion of the engaging body inside the movable member to release the engaging portion, and in the engaged state, the engaging portion is engaged with a locking member of a locking object. In the latch device, the relative movement of the latching object is regulated by the engagement, wherein the operating unit is configured to move the engaging portion with respect to the movable element when the engaging portion is in the engaged state. A latch device that protrudes regressively. 3. The latch device according to claim 1, wherein the engaging portion projects from the movable element in the engaged state by an elastic restoring force of an elastic means. 4. A pressing spring interposed between the housing and the engaging body and constantly pressing the moving element from the first position toward the second position via the engaging body; When the movable element is pressed from the second position to the first position against the pressing force, the movable element is stopped at the first position, and when the movable element is further pressed in the same direction from the first position, And a position defining means for returning the movable member to the second position by a pressing force of a pressing spring, wherein the engaging portion is protruded from the moving member in the engaged state by the pressing force of the pressing spring. The latch device according to claim 2. 5. When the moving member and the object to be locked which are separated from each other are moved close to the engaging portion of the engaging body in a state where the engaging portion is protruded, the engaging member comes into contact with the locking tool. The latch device according to any one of claims 1 to 4, further comprising a retreating surface for retreating the engaging portion of the engaging body when pressed against the locking tool. 6. The latch device according to claim 2, wherein said engaging body is disposed so as to be movable with respect to said moving element in a moving direction of said moving element. 7. When at least one of the moving element and the engaging portion of the engaging member is pressed against each other with the moving element protruding, the engaging portion of the engaging member is attached in the protruding direction. A first operating surface that urges against the engaging portion of the engaging body, and is brought into contact with the engaging member by pressing the engaging member with the engaging member. 7. The device according to claim 1, further comprising a second operating surface for retreating the engaging portion of the engaging body against the urging force.
The latch device according to claim 1. 8. The moving member according to claim 1, wherein a guide mechanism provided between the engaging body and the housing retracts and stores the engaging portion with respect to the movable element in the release state. The latch device according to claim 1.