JP2022125627A - latch device - Google Patents

Abstract

To provide a latch device which can prevent occurrence of malfunction of a pin.SOLUTION: A latch device includes: a housing 2; a slide member 3 stored in the housing 2 so as to slide, and having a holding part 4 for holding an opening/closing body at a front end part; a spring 15 for energizing the slide member 3 frontward with respect to the housing 2; and a pin 17 having both end parts 17a, 17c folded in a substantially L-shape with respect to a central part 17b and a central part 17b. One end part 17a of the pin 17 is rotatably fitted in a hole 12b of the slide member 3. The other end part 17c of the pin 17 enters a circulation groove 11 (cam part 6) provided at the housing 2. At the slide member 3, a cover 18 is provided which has a body part 18a arranged between the central part 17b of the pin 17 and the circulation groove 11 (cam part 6).SELECTED DRAWING: Figure 3

Description

The present invention relates to a latch device for holding a locked position of an opening/closing member such as a door in a building, furniture, or the like.

2. Description of the Related Art A latch device that holds an opening/closing member such as a door in a locked position is known (see Patent Document 1). The latch device includes a sliding member having a holding portion (magnet, pair of arms, etc.) that attracts the opening/closing body. The opening/closing body is attracted to the sliding member in the locked position. In this latch device, when the user pushes the opening/closing body in the locked position, the opening/closing body is temporarily retracted and then opened slightly. The opening/closing body can be opened by placing a hand on the opening/closing body that has been slightly opened.

The latch device includes a housing, a sliding member slidably accommodated in the housing and having a holding portion (a magnet or a pair of arms, etc.) holding an opening/closing member at its front end, and a sliding member forwardly extending relative to the housing. and a pin having a central portion and opposite ends bent in a generally L-shape with respect to the central portion. One end of the pin is rotatably fitted in the hole of the slide member. The other end of the pin enters a circulation groove provided in the housing.

Japanese Utility Model Publication No. 62-124162

However, in the conventional latch device, when the sliding member is in the locked position, the force of the spring acts on the pin in a pulling direction. Due to this force, when the latch device is used beyond its useful life, the pin may tilt in the direction of being pulled out of the hole of the sliding member or may come out of the hole, resulting in malfunction.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a latch device capable of preventing pins from malfunctioning.

In order to solve the above-mentioned problems, the present invention provides a housing, a sliding member slidably accommodated in the housing and having a holding portion at its front end for holding an opening/closing member, and a spring that biases the sliding member forward; and a pin that has a central portion and both ends that are bent in a substantially L shape with respect to the central portion, and one end of the pin is connected to the sliding member or the sliding member. In a latch device rotatably fitted in one hole of a housing and the other end of said pin entering a circulation groove provided in the other of said sliding member or said housing, said one of said sliding member or said housing (2) a cover having a body portion disposed between the center portion of the pin and the circulation groove;

According to the present invention, the cover can prevent the pin from entering the circulation groove, so that the pin can be prevented from tilting in the direction of coming out of the hole of the sliding member or the housing and from coming out of the hole. Therefore, it is possible to prevent the pin from malfunctioning.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view of a latch device according to an embodiment of the present invention (FIG. 1(a) shows a locked position (closed position) of a sliding member, and FIG. 1(b) shows a slightly opened position of a sliding member; ). It is an exploded perspective view of a latch device of this embodiment. 3A and 3B are vertical cross-sectional views of the latch device of the present embodiment (FIG. 3A shows the locked position (closed position) of the sliding member, and FIG. 3B shows the slightly opened position of the sliding member). It is a perspective view of the cover of the latch device of this embodiment. It is a figure showing the sliding member of the latch device of the present embodiment (FIG. 5(a) shows a bottom side perspective view of the sliding member, FIG. 5(b) is a cross section taken along line bb in FIG. 5(a) (shown in the figure). It is a figure (state where the pin and the cover were attached to the sliding member) which shows the sliding member of the latch device of this embodiment (Fig.6 (a) shows the bottom side perspective view of a sliding member, FIG.6(b) shows a cross-sectional view taken along line bb in FIG. 6(a)). It is a figure which shows the circulation groove|channel of the cam part of the latch apparatus of this embodiment (Fig.7 (a) shows the inclination of a circulation groove|channel, FIG.7(b) shows the top view of a circulation groove|channel).

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, latch devices according to embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the latch apparatus of the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. The present embodiments are provided with the intention of allowing those skilled in the art to fully understand the invention through a thorough disclosure of the specification.

1(a) and 1(b) show external perspective views of a latch device 1 according to an embodiment of the present invention. A latch device 1 includes a housing 2 and a sliding member 3 slidable relative to the housing 2 . The housing 2 is attached to a frame, a housing, or the like in a building, furniture, or the like. A holding portion 4 for holding an opening/closing member such as a door is provided at the front end portion of the sliding member 3 .

FIG. 1(a) shows the locked position of the sliding member 3. FIG. The opening/closing body is provided with a suction plate that is suctioned by the holding portion 4 . The opening/closing body is attracted to the holding portion 4 of the sliding member 3 to hold its locked position. When the user pushes the sliding member 3 in the locked position shown in FIG. 1(a), the sliding member 3 retreats once and then moves forward to the front end position (slightly open position) shown in FIG. 1(b). . The opening/closing body can be opened by placing a hand on the opening/closing body at the slightly open position.

The configuration of the latch device 1 will be described below. FIG. 2 shows an exploded perspective view of the latch device 1. FIG. 3(a) and 3(b) show longitudinal sectional views of the latch device 1. FIG.

2 is a housing. The housing 2 is formed in a box shape with an open front. The housing 2 includes a main body portion 5 having a substantially U-shaped cross section and a plate-like cam portion 6 attached to the lower end of the main body portion 5 . The cam portion 6 has a projection 6 a at its rear end that engages the rear wall of the main body 5 , and a front end 6 b that is attached to the main body 5 with a caulking pin 8 . A circulation groove 11 is formed in the cam portion 6 . The circulation groove 11 will be described later.

Reference numeral 9 denotes an attachment plate for attaching the housing 2 to a frame, housing, or the like in a building, furniture, or the like. The housing 2 is attached to a frame, housing, or the like via an attachment plate 9 . The mounting plate 9 is fixed to a frame, housing, or the like with fastening members such as screws. The housing 2 is detachably attached to the mounting plate 9 .

An edge portion 9a of the mounting plate 9 is formed with a projection 9a1 that engages with a claw 5a of the housing 2 (body portion 5). A lock lever 7 is provided on the housing 2 so as to be vertically movable. The lock lever 7 is biased downward with respect to the housing 2 by a spring 10 (see FIG. 3(a)). When the claws 5a of the housing 2 are fitted into the notches 9a2 of the mounting plate 9 and the housing 2 is slid rearward, the claws 5a of the housing 2 are engaged with the protrusions 9a1 of the mounting plate 9, and the force of the spring 10 locks the lock lever. 7 fits into holes 9b in mounting plate 9; The housing 2 is thereby attached to the mounting plate 9 . When removing the housing 2 from the mounting plate 9, the lock lever 7 is lifted and the housing 2 is slid forward.

As shown in FIG. 2 , the sliding member 3 includes a flat main body portion 12 having a rectangular cross section and a holding portion 4 attached to the front end portion of the main body portion 12 . The holding portion 4 includes a magnet 4a and a pair of yokes 4b that sandwich the magnet 4a. The yoke 4b has a substantially T-shaped plate shape, and includes a substantially rectangular body portion 4b1 and an extension portion 4b2 extending from the body portion 4b1. At both ends of the body portion 4b1 in the front-rear direction, claws for fixing the magnets 4a are provided. The holding portion 4 is attached to the body portion 12 by, for example, a crimping pin 13 (see FIG. 3A).

A spring 15 biases the sliding member 3 forward with respect to the housing 2 . 16 is a spring receiver. The body portion 12 of the sliding member 3 is formed with a hole 12a (see FIG. 5A) into which the front end portion of the spring 15 is inserted. A spring bearing 16 is supported on the rear wall of the housing 2 .

A pin 17 is rotatably attached to the sliding member 3 . The pin 17 has a central portion 17b and both end portions 17a and 17c bent in a substantially L shape with respect to the central portion 17b. The one end 17a and the other end 17c are bent in opposite directions. The one end 17a is rotatably fitted in the hole 12b of the sliding member 3. As shown in FIG. The one end portion 17a is movable with respect to the sliding member 3 in the axial direction (vertical direction). The other end portion 17 c enters the circulation groove 11 of the cam portion 6 .

A cover 18 is attached to the sliding member 3 to cover the one end portion 17 a and the central portion 17 b of the pin 17 . The cover 18 has a plate-like shape, and includes a main body portion 18a and both end portions 18b bent with respect to the main body portion 18a (see FIG. 4). The cover 18 has a U-shaped cross section. Both ends 18b of the cover 18 are fitted into the slits 26a of the sliding member 3 (see FIG. 5(a)). The cover 18 is movable together with the sliding member 3 . Although the cover 18 is not fixed to the sliding member 3 with a fastening member such as a screw, it may be fixed to the sliding member 3 with a fastening member.

The sliding member 3 is provided with a spring 21 that biases the pin 17 toward the circulation groove 11 . The spring 21 biases the central portion 17b of the pin 17 via the pressing body 22. As shown in FIG. The pressing body 22 includes an inner cylindrical portion 22a and an outer cylindrical portion 22b (see FIG. 3A). The spring 21 is accommodated between the inner cylindrical portion 22a and the outer cylindrical portion 22b of the pressing body 22. As shown in FIG.

FIG. 5( a ) shows a bottom perspective view of the body portion 12 of the sliding member 3 . A hole 23 into which one end portion 17a of the pin 17 is fitted is formed in the bottom surface of the body portion 12 . A fan-shaped notch 24 is formed around the hole 23 in the bottom surface of the body portion 12 . Rotation of the pin 17 beyond a predetermined amount is restricted by the wall surface of the notch 24 . A hole 25 into which the pressing body 22 is fitted is formed in the notch 24 .

A concave portion 26 matching the thickness of the main body portion 18 a of the cover 18 is formed in the bottom surface of the main body portion 12 of the sliding member 3 . The concave portion 26 is formed with slits 26a into which both ends 18b of the cover 18 are inserted.

FIG. 6 shows a state in which the pin 17 and the cover 18 are attached to the body portion 12 of the sliding member 3. As shown in FIG. One end portion 17 a and a central portion 17 b of the pin 17 are covered with a cover 18 . As shown in FIG. 3A, the body portion 18a of the cover 18 is arranged between the central portion 17b of the pin 17 and the circulation groove 11 (cam portion 6).

As shown in FIG. 6A, the bottom surface of the main body 12 of the sliding member 3 is provided with a pair of left and right projections 12d. The projection 12d fits into a guide groove 28 (see FIG. 2) extending in the front-rear direction of the cam portion 6. As shown in FIG. The sliding of the sliding member 3 with respect to the housing 2 is guided by the guide grooves 28 . The front ends of the guide grooves 28 are connected by a connecting groove 29 . A cushioning material 30 is arranged in the connecting groove 29 . The cushioning material 30 absorbs the impact when the projection 12d of the main body 12 hits.

7A and 7B show detailed views of the circulation groove 11 of the cam portion 6. FIG. 7(b) is a plan view of the circulation groove 11, and FIG. 7(a) is a diagram showing the gradient of the circulation groove 11. As shown in FIG. As shown in FIG. 7B, the circulation groove 11 is heart-shaped. That is, the circulation groove 11 includes a rear M-shaped cam groove 31 and a front V-shaped cam groove 32 .

As shown in FIG. 7(a), the circulation groove 11 has steps 33a, 33b, 33c and 33d. As shown in FIGS. 7(a) and 7(b), a groove 32a forming the V-shaped cam groove 32 is formed with an upward slope toward the rear. A groove 31 a that forms the M-shaped cam groove 31 is formed with an upward slope toward the central portion (Y position) of the M-shaped cam groove 31 . A groove 31b forming the M-shaped cam groove 31 is formed with an upward slope toward the rear. A groove 32b forming the V-shaped cam groove 32 is formed with an upward slope toward the front. The steps 33a, 33b, 33c, and 33d allow the pin 17 to circulate only in the forward direction (clockwise) and not in the reverse direction.

When the sliding member 3 is at the locked position, the other end 17c of the pin 17 (hereinafter simply referred to as the pin 17) is at the Y position as shown in FIG. 7(b). When the user pushes the sliding member 3, the pin 17 enters the groove 31b of the M-shaped cam groove 31 and hits the end of the groove 31b. Since the sliding member 3 cannot retreat any further, when the force pushing the sliding member 3 is removed, the force of the spring 15 causes the pin 17 to enter the groove 32b of the V-shaped cam groove 32 and pass through the Z position. and move forward to the V position. At this time, the protrusion 12d of the sliding member 3 abuts against the cushioning material 30, and the sliding member 3 cannot advance any further and stops. As a result, the slightly opened position of the sliding member 3 shown in FIG. 3(b) is maintained.

When the user pushes the sliding member 3 again, as shown in FIG. 7B, the pin 17 enters the groove 32a of the V-shaped cam groove 32, passes through W, and enters the groove of the M-shaped cam groove 31. 31a and hits the end (X position) of the groove 31a. Since the sliding member 3 cannot retreat any further, when the force pushing the sliding member 3 is removed, the force of the spring 15 causes the pin 17 to drop into the central portion (Y position) of the M-shaped cam groove 31 and move forward. become unable to. Thereby, the locked position of the sliding member 3 is held.

As shown in FIG. 3A, when the sliding member 3 is in the locked position, the force of the spring 15 acts on the pin 17 in the pulling direction. Due to this force, as indicated by the dashed line in FIG. 3(a), the pin 17 may tilt in the direction to come out of the hole 12b of the sliding member 3 or may come out of the hole 12b, causing a malfunction. be. However, since the body portion 18a of the cover 18 is provided between the central portion 17b of the pin 17 and the circulation groove 11, the body portion 18a can prevent a part of the pin 17 from entering the circulation groove 11, thereby preventing the pin from entering the circulation groove 11. 17 can be prevented from tilting in the direction of slipping out of the hole 12b of the sliding member 3 or slipping out of the hole 12b of the sliding member 3. Therefore, it is possible to prevent the pin 17 from malfunctioning.

Further, one end portion 17a of the pin 17 is made movable in the axial direction (vertical direction) with respect to the sliding member 3, and the sliding member 3 is provided with the spring 21 for biasing the pin 17 toward the circulation groove 11. operation can be made more stable.

Note that the present invention is not limited to being embodied in the above-described embodiments, and can be modified into various embodiments without changing the gist of the present invention.

In the above embodiment, one end of the pin is axially (up and down) movable with respect to the sliding member. spring force may be used to move the other end of the pin up and down.

In the above embodiment, the sliding member is provided with the pin and the housing is provided with the circulation groove, but the sliding member may be provided with the circulation groove and the housing with the pin.

In the above embodiment, a magnet is used as the holding portion of the sliding member, but a pair of arms for gripping the protrusions of the opening/closing body may be used.

DESCRIPTION OF SYMBOLS 1... Latch device 2... Housing 3... Sliding member 4... Holding part 15... Spring 17... Pin 17a... One end of pin 17b... Central part of pin 17c... Other end of pin

Claims (2)

a housing;
a sliding member slidably accommodated in the housing and having a holding portion for holding an opening/closing member at a front end thereof;
a spring that biases the sliding member forward with respect to the housing;
a pin having a central portion and both ends bent in a substantially L shape with respect to the central portion;
with
one end of the pin is rotatably fitted in one hole of the sliding member or the housing;
In the latch device, the other end of the pin enters a circulation groove provided in the other of the sliding member or the housing,
A latch device, wherein said one of said sliding member and said housing is provided with a cover having a body portion disposed between said central portion of said pin and said circulation groove. one end of the pin is axially movable with respect to the one of the slide member or the housing;
2. A latch device according to claim 1, wherein said one of said sliding member and said housing is provided with a spring for urging said pin into said circulation groove.

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