KR20170130719A - Latch Bolt For Using Push-Pull Door Lock - Google Patents

Abstract

The present invention provides a latch bolt for a push-pull door lock, capable of preventing sudden opening of a door. According to the present invention, the latch bolt comprises: a latch housing having an opening part communicating with the outside formed on one surface to be inserted and installed in a side surface of a door; a guide body coupled to the inside of the latch housing to be able to move, and having a first coupling part outwardly protruding in a top of the one surface and a second coupling part outwardly protruding in a top of the other surface; a latch head hinge-coupling one top thereof to the first coupling part of the guide body to outwardly protrude to the outside of the opening part; a latch bar coupling one end thereof to the latch head, allowing the other end thereof to penetrate the guide body and a center of the latch housing to be coupled to an opening/closing unit interlocked with motion pushing or pulling a door handle, and interlocked with operation of the opening/closing unit to move in a direction perpendicular to a direction to open the door when the door is opened; and a stopper coupling one end thereof to the second coupling part of the guide body to be able to rotate, and having a stopper hole through which the latch bar is penetrated formed in a center to be inserted into the outside of the latch bar. Accordingly, as one end is rotated on a center by a pushing force of a spring elastically installed in the guide body to form an inclination, the stopper allows the stopper hole to limit movement of the latch bar, thereby preventing rotation of the latch head. Moreover, as the latch bar is vertically erected by a force applied in an opposite direction of the spring when the latch bar is moved in accordance with opening of the door, the stopper hole releases the latch head, thereby allowing the latch head to be rotated on a hinge.

Description

[0001] The present invention relates to a latch bolt for a push-pull door lock,

The present invention relates to a latch bolt for a push-pull door lock, and more particularly, to a latch bolt for a push-pull door lock capable of opening a door conveniently and smoothly with a small force, minimizing noise generated when the door is opened, To a latch bolt for a push-pull door lock.

Generally, the door lock apparatus is provided with a rotary knob on both sides of a door, and a latch interlocking with each knob is buried in a state protruding from an end of the door. Accordingly, when the user holds the handle by hand, the latch is pulled to the inside of the door. When the door is pushed or pulled in this state, the door is opened.

However, in the conventional door lock apparatus, when the door is opened, the user has to open the door by pushing or pulling the door while holding the door handle by hand. That is, if the door is to be opened in a closed state, the door must be rotated and rotated first, and then the door must be pushed or pulled in succession.

Especially for children, elderly people and the disabled, it is not easy to turn the door handle, so it is difficult to access. Also, if the user holding the object in both hands wants to go in, put the object on the floor, There was an inconvenience that the door had to be opened and then carried again.

Recently, a push-pull door lock device has been proposed in which a door is simply opened or closed by simply pushing or pulling the handle without rotating the door handle.

The latch bolt used in the conventional push-pull door lock device has a fan shape in which the shape of the latch head is formed by a rectilinear surface and an arcuate arc surface in consideration of the closing and opening of the door.

Since the latch bolt having such a shape is moved in a direction parallel to the straight surface of the latch head when the door is opened and comes out from the groove of the door frame, if the door is opened quickly, the straight surface of the latch head will not come out from the groove of the door frame The door is not opened smoothly as it is caught in the groove of the door frame and the door is not opened until the end of the straight surface comes out of the door frame. When the end of the straight surface comes out of the door frame There is a problem that the opening operation of the door is not smooth as the door is suddenly opened.

Korean Registered Utility Model: 20-0473263 (Notice date 2014.06.19)

Korean Registered Patent: 10-1453945 (Notification date October 23, 2014)

SUMMARY OF THE INVENTION The present invention has been made to solve the conventional problems,

SUMMARY OF THE INVENTION It is an object of the present invention to provide a latching apparatus and a latching apparatus which can prevent the latching of a latching member when the door is opened, And a latch bolt for a push-pull door lock which solves the problem that the door is suddenly opened by allowing the straight surface to smoothly come out from the groove of the door frame smoothly in the course of the rotation of the latch head about the hinge, .

Another object of the present invention is to provide a latch bolt for a push-pull door lock which stably maintains the closed state of the door by restricting movement of the latch bar so that the latch head is not rotated around the hinge when the door is closed.

Another object of the present invention is to provide a latch bolt for a push-pull door lock which can open a door conveniently and smoothly with a small force, such as a child and a senior citizen, with a small force, .

According to an aspect of the present invention, there is provided a latch bolt for a push-pull door lock, the latch bolt having an opening communicating with the outside on one side of the latch housing; A guide body movably coupled to the latch housing and including a first engaging portion protruding outward at an upper end of the first face and a second engaging portion protruding outward at an upper end of the back face; A latch head hinged to an upper end of the first side of the guide body and protruding outside the opening; The door is coupled to the latch head at one end thereof. The other end of the door is coupled to the door body through the center of the guide body and the latch housing. The door is interlocked with the pushing or pulling operation of the door handle. A latch bar moved in a direction perpendicular to a direction in which the latch bar is opened; A stopper hole through which the latch bar is passed is formed at one end of the stopper hole so as to be rotatably engaged with the second engaging part of the guide body and is fitted to the outside of the latch bar, The stopper hole restricts the movement of the latch bar to prevent rotation of the latch head and the slope is reduced by the force acting in the direction opposite to the spring when the latch bar is moved along with the opening of the door And a stopper for releasing the latch bar from the stopper hole and allowing the latch head to rotate around the hinge.

The stopper is moved in conjunction with the guide body when the latch bar is moved along with the opening of the door, is pushed by the latch housing to reduce the inclination thereof, and the stopper hole releases the latch bar to allow rotation of the latch head .

A guide bar is formed at the other end of the latch bar along the longitudinal direction, a slide bar having a length shorter than the latch bar and having a protruding protrusion of an inclined surface and the other end coupled to the opening / closing unit is movably coupled, The stopper is provided with a support protrusion that catches the projection of the inclined surface. When the slide bar is moved by the driving of the opening / closing unit, the base protrusion of the stopper rides on the inclined surface of the protrusion, And releasing the restraint of the bar to allow rotation of the latch head.

The latch bar may have a hexagonal cross-sectional shape, and the stopper hole through which the latch bar passes may be a hexagonal shape.

In addition, the guide body and the latch housing are formed with first and second through-holes, respectively, through which the latch bar passes, and the first and second through-holes are hexagonal or circular.

An elastic spring is provided between the rear surface of the guide body and the rear inner side wall of the latch housing to elastically support the guide body to project the latch head protruding outside the opening of the latch housing.

The latch housing has a hollow body having an opening formed on one side thereof and a rear plate covering the rear side of the hollow body.

The latch head has a first coupling part protruded for hinge-coupling with the first coupling part, a curved groove is formed on a surface to which the first coupling part is brought into contact, A second engagement piece for hinge engagement of the latch bar is formed, and a step is formed at the lower end of the arc surface of the latch head to engage with the opening of the latch housing.

In addition, a guide member having an induction slope is integrally provided at a lower end of the guide body to receive a lower end portion of the latch head rotated about the hinge when the latch bar is moved.

According to the embodiment of the present invention, when the door is quickly opened or when the force of pushing or pulling the door handle is weak, the straight face of the latch head is caught by the groove of the door frame to solve the conventional problem that the door is not opened smoothly And the door is opened suddenly.

Even when the force of F1 is applied to the latch head when the door is closed, the stopper hole of the stopper having a slope restrains the movement of the latch bar to prevent the latch head from rotating. Thus, the closed state of the door is maintained, .

When the latch bar is moved by the force of F2 when the door is opened, the stopper moved together with the guide body is vertically pushed by the rear plate of the latch housing, so that the stopper hole releases the latching of the latch bar, The latch head is rotated around the hinge to open the door quickly and smoothly.

When the door is opened, the slide bar is first pulled and moved in the direction of the force F2. When the slide bar is moved, the support protrusions of the stopper are lifted and raised along the inclined surfaces of the protrusions, The stopper hole of the stopper releases the restraint of the latch bar and the latch bar is moved in a state where the restraint of the latch bar is released, so that smooth movement of the latch bar and smooth rotation of the latch head, And the noise generated when the door is opened is minimized.

1 is an external perspective view of a latch bolt for a push-pull door lock according to an embodiment of the present invention;
2 is an exploded perspective view showing a latch bolt for a push-pull door lock according to an embodiment of the present invention;
3 is a sectional view showing a latch bolt for a push-pull door lock according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a latch bolt for a push-pull door lock according to an embodiment of the present invention. FIG. 4 is a plan view of a latch bolt for a push-pull door lock according to an embodiment of the present invention. And the door is kept closed as the door is closed.
5 and 6, in the latch bolt for a push-pull door lock according to an embodiment of the present invention, when the latch bar is moved by the force F2 applied to the latch bar when the door is opened, the tilted stopper is vertically erected, Fig. 5 is a sectional view for explaining an operation of releasing the restraint of the latch bar and allowing the movement of the latch bar and an operation of rotating the latch head about the hinge.
7 is an exploded perspective view showing a latch bolt for a push-pull door lock according to another embodiment of the present invention;
8 is a cross-sectional view of a latch bolt for a push-pull door lock according to another embodiment of the present invention. When a force of F1 is applied to a latch head when a door is closed, a stopper hole of a stopper restrains movement of the latch bar, Fig. 6 is a sectional view for explaining a state in which the door is kept closed as the head is prevented from rotating.
9 to 11 are latch bolts for a push-pull door lock according to another embodiment of the present invention. When the door is opened, the slide bar is pulled and moved in conjunction with driving of the opening and closing unit. When the slide bar is moved, The stopper hole is released from the restraint of the latch bar to permit the movement of the latch bar and the operation in which the latch head is rotated around the hinge Cross-section.

These and other objects, features and other advantages of the present invention will become more apparent by describing in detail preferred embodiments of the present invention with reference to the accompanying drawings. Hereinafter, a latch bolt for a push-pull door lock according to the present invention will be described in detail with reference to the accompanying drawings. For purposes of this specification, like reference numerals in the drawings denote like elements unless otherwise indicated.

Referring to Figs. 1 to 3, the construction of a latch bolt for a push-pull door lock according to an embodiment of the present invention will be described. Referring to Fig. 4, when the door is closed, The stopper hole of the stopper restrains the movement of the latch bar to prevent the rotation of the latch head to keep the door closed. Referring to FIGS. 5 and 6, when the door is opened, F2 An operation of allowing the stopper hole to release the restraint of the latch bar to permit movement of the latch bar and an operation of rotating the latch head about the hinge will be described.

1 to 3, a latch bolt for a push-pull door lock according to an embodiment of the present invention includes a latch housing 100, a guide body 200, a latch head 300, a latch bar 400 , And a stopper (500).

First, the latch housing 100 is provided with a receiving portion 130, an opening 111 communicating with the outside is formed on one side of the receiving portion, and the latch housing 100 is inserted and mounted on the side of the door with the opening facing outward.

The latch housing 100 includes a hollow body 110 having an opening 111 formed on one side thereof and a hollow body 110 for inserting a guide body, a latch head, a latch bar, and a stopper into the hollow body 110, 110 are covered with a rear plate 120 to form a receiving portion 130. A first through hole 121 through which a rear end of a latch bar 400 described later is formed is formed at the center of the rear plate 120. A second through hole 121 is formed in an upper portion of the first through hole 121, And a hole 122 through which an additive enters and exits is formed.

The guide body 200 is inserted into the receiving portion 130 of the latch housing 100.

The guide body 200 has the same outer surface as the inner surface of the receiving portion 130 of the latch housing and is accommodated in the receiving portion 130. When the pulling or pushing force is applied in a state of being accommodated in the accommodating portion 130, the pushing or pushing force is moved along the inner surface of the accommodating portion 130.

The guide body 200 is provided with a first coupling part 210 protruding outward from the upper end of one side and a second coupling part 220 protruding outward from the upper side of the back side, 400 are passed through the second through hole 230.

The latch head 300 is coupled to the first coupling portion 210 of the guide body 200.

The latch head 300 is formed into a fan shape having a straight surface and an arcuate arc surface in consideration of the closing and opening of the door.

A first coupling part 310 for coupling with the first coupling part 210 of the guide body is formed at one end of the latch head 300, that is, at one end of the linear surface.

The first engaging piece 310 of the latch head 300 is engaged with the first engaging portion 210 of the guide body 200 so that the latch head is rotatable about the hinge 311 . At this time, the hinge 311 is wound with a spring 312, one end of which is coupled to the first coupling portion 210 and the other end is coupled to the first coupling piece 310 of the latch head, 300).

In addition, the latch head 300 is formed with a curved groove 313 on the surface where the first engaging portion 210 of the guide body contacts. The groove 313 of the curved surface guides smooth rotation without friction with the first engagement portion 210 when the latch head 300 rotates.

A second coupling piece 320 for hinge coupling with the latch bar 400 is formed on the rear surface of the latch head 300 and an elongated hole 321 is formed in the second coupling piece.

An elastic spring 330 is mounted between the rear surface of the guide body 200 and the rear plate 120 of the latch housing 100 to push the guide body 200 with an elastic force.

The elastic spring 330 is inserted into the groove 201 formed on the back surface of the guide body 200 and the protrusion 123 formed on the rear plate 120 and is pushed by the elastic force of the guide body 200, Is protruded outside the opening 111 of the latch housing.

As a result, the latch head 300 coupled to the first coupling portion 210 of the guide body 200 maintains a state protruding outside the opening 111 of the latch housing. At this time, a step 340 is formed at the lower end of the circular arc surface of the latch head 300 so as to engage with the inner jaw of the opening 111 of the latch housing. The step 340 is formed on the way that the latch head 300 protrudes outward, The rotation angle is limited so that the latch head 300 does not deviate from the opening 111.

The latch bar 400 is coupled to the second engaging piece 320 of the latch head 300.

A pinhole 401 is formed at one end of the latch bar 400 and a pinhole 401 is superimposed on the pinhole 402 in an elongated hole 321 formed in the second engaging piece 320 of the latch head. The other end of the latch bar 400 passes through the second through hole 230 formed in the guide body 200 and the first through hole 121 formed in the rear plate 120 of the latch housing, (Not shown) interlocked with the pushing or pulling action of the push button (not shown).

 Here, the latch bar 400 has a hexagonal cross-sectional shape. Therefore, it is preferable that the first and second through holes 121 and 230 through which the latch bar 400 passes are hexagonal or circular.

When the user pushes or pulls the door handle to open the door, the latch bar 400 is moved in the direction perpendicular to the opening direction of the door in cooperation with the operation of the opening / closing unit linked to the door.

That is, when the latch bar 400 moves in the direction of the force F2 by the force F2 acting in a direction perpendicular to the direction in which the door is opened, the latch head 300 coupled to the latch bar 400, The guide body 200 to which the latch head 300 is coupled is also moved along with it.

The latch head 300 is retracted into the receiving portion 130 of the latch housing and the stopper 500 coupled to the second engaging portion 220 of the guide body 200 is engaged with the rear plate 120 of the latch housing. The latch head 300 is rotated about the hinge 311 by the force of the latch bar 400 and is turned by the force of the latch bar 400 when the guide body 200 is no longer moved.

At this time, a guide piece 250 having a guide slope 251 is integrally provided at a lower end of the guide body 200 to receive the lower end portion of the latch head 300, which is rotated around the hinge 311.

The guide piece 250 forms a guide slope 251 having a curved surface that is the same as the rotation angle of the latch head 300 to stably guide the movement of the latch head 300 which is turned around the hinge 311.

Herein, the operation in which the latch head 300 is rotated about the hinge 311 and is turned is performed such that when the latch bar 400 moves in the direction of the force F2, the force that the latch bar 400 pulls the latch head 300 The latch bar 400 may be moved due to rotation of the latch head about the hinge 311 when the force F1 is applied to the straight surface of the latch head 300. However, May occur.

This is not intended to open the door by pushing or pulling the door handle in the closed state of the door, but even when an external force is applied to the door, external force is applied to the door, the door may be opened arbitrarily.

Therefore, the latch head 300 is not intended to open the door when an external force is applied to the latch head 300. Therefore, a stopper (not shown) for restricting the movement of the latch bar 400 so that the latch head 300 is not rotated about the hinge 311 500).

The stopper 500 is rotatably coupled to the second engaging part 220 of the guide body 200 and has a stopper hole 510 through which the latch bar 400 passes, . Then, the pushing force of the spring 520, which is resiliently mounted on the back surface of the guide body 200, is rotated around one end to have a tilt.

Here, the one end of the stopper may be coupled to the second engaging portion of the guide body and rotated, or may be rotatably coupled to the second engaging portion so that one end of the stopper is inserted.

The stopper hole 510 of the stopper has a hexagonal shape similar to the shape of the latch bar. The hexagonal stopper hole 510 is inclined by the inclination of the stopper 500 and the inclined stopper hole 510 contacts the outer surface of the latch bar 400 to restrict movement of the latch bar.

4, even if an external force is applied to the latch head 300, since the latch bar 400 is not moved due to the restraint of the stopper 500, the latch head 300 is moved around the hinge 311 So that the door is not opened arbitrarily.

When a force is applied to the stopper 500 in a direction opposite to the pushing force of the spring 520, the stopper hole 510 is turned horizontally as the slope of the stopper 500 is vertically raised, (400) is released.

5, when the force F2 acts in a direction perpendicular to the direction in which the door is opened according to the interlocking of the opening and closing unit when the door is opened, the latch bar 400 moves in the direction of the force, The guide body 200 is pulled together with the latch head 300 coupled to the latch bar 400 to move in the moving direction of the latch bar 400 and the stopper coupled to the second engaging part 220 of the guide body 500 are also moved to come in contact with the rear plate 120 of the latch housing 100 and are pushed by the rear plate and are vertically positioned. At this time, the stopper hole 510 disengages the latch bar 400 to allow the latch bar 400 to move.

6, the latch head 300 is retracted by the movement of the latch bar 400 and is drawn into the receiving portion 130 of the latch housing 200 and is inserted into the second engaging portion 220 of the guide body 200 When the coupled stopper 500 is caught by the rear plate 120 of the latch housing and the guide body 200 is no longer moved, the latch head 400 is rotated by the force of the latch bar 400 about the hinge .

As described above, according to the embodiment of the present invention, when the force of F1 is applied to the latch head when the door is closed, the stopper hole of the stopper having the inclination restricts the movement of the latch bar to prevent rotation of the latch head, When the latch bar is moved by the force of F2 on the latch bar when the door is opened, the stopper moved together with the guide body is pushed by the rear plate of the latch housing and is positioned close to the vertical, so that the stopper hole releases the latch bar And the latch head is moved about the hinge by the movement of the latch bar whose restraint is released, so that the door can be opened quickly and smoothly.

A latch bolt for a push-pull door lock according to another embodiment of the present invention will be described with reference to FIGS. 7 to 11. FIG.

7 to 11, a latch bolt for a push-pull door lock according to another embodiment of the present invention includes a latch housing 100, a guide body 200, a latch head 300, A latch bar 400, and a stopper 500. As shown in Fig. Here, the latch housing 100, the guide body 200, and the latch head 300 are the same as those in the embodiment. Therefore, the description of the latch housing, the guide body, and the latch head will be omitted, and only the latch bar 400 and the stopper 500 in which the difference exists will be described.

The latch bar 400 has a pin hole 401 formed at one end thereof coupled to a pin hole 402 formed in the second engagement piece 320 of the latch head and a second end (P) interlocked with the operation of pushing or pulling the door handle (not shown) through the hole 230 and the first through hole 121 formed in the rear plate 120 of the latch housing.

In addition, a guide hole 410 is formed along the longitudinal direction at the other end of the latch bar 400, and a slide bar 420 is movably coupled to the guide hole 410. Here, the guide hole 410 is opened at the end of the latch bar 400, and the slide bar 420 is coupled to the inside and the outside of the guide hole 410 so as to be drawn in and out.

The slide bar 420 is formed with a projecting step 421 having an inclined surface 422 on one side and the other end is coupled to the opening and closing unit P. [ At this time, the length of the slide bar 420 is shorter than that of the latch bar 400, so that when the slide bar 420 is engaged with the opening / closing unit, the end of the slide bar 420 is positioned forward of the end of the latch bar 400, The slide bar 420 is pulled and moved first. When the end of the slide bar 420 is positioned on the same line as the end of the latch bar 400, the latch bar 400 is pulled together and moved.

The stopper 500 is rotatably coupled to the second engaging portion 220 of the guide body at one end thereof and has a stopper hole 510 through which the latch bar 400 and the slide bar 420 are passed, 400 and the slide bar 420, respectively. A support protrusion 530 is provided at the other end of the stopper 500 so as to correspond to the inclined surface 422 of the protrusion 421 formed on the slide bar 420. Then, the pushing force of the spring 520, which is resiliently mounted on the back surface of the guide body, is rotated around one end and has a tilt.

At this time, the stopper hole 510 is inclined by the inclination of the stopper 500, and the tilted stopper hole 510 contacts the latch bar 400 and the outer surface of the slide bar 420 to move the latch bar 400 And the support protrusions 530 are caught by the inclined surfaces 422 of the protruding jaws to restrain the movement of the slide bars 420.

8, even when an external force is applied to the latch head 300, since the latch bar 400 and the slide bar 420 are not moved by the restraint of the stopper 500, The door 311 is not rotated around the door 311 and the door is not opened arbitrarily.

On the other hand, when a force is applied in a direction opposite to the pushing force of the spring 520, the stopper 500 is rotated about its one end to be vertically positioned and the inclined stopper hole 510 is horizontal, So that the restraint of the bar 400 is released.

9, the slide bar 420 moves in a direction perpendicular to the direction in which the door is opened before the latch bar 400 is interlocked with the driving of the opening / closing unit P when the door is opened The support protrusion 530 of the stopper moves up and down on the inclined surface 422 of the protruding protrusion and is positioned on the upper surface of the protrusion protrusion 421 as the slide bar 420 moves. At this time, since the support protrusion 530 applies a force for supporting the stopper 500 in a direction opposite to the pushing force of the spring 520, the stopper 500 is vertically erected and the stopper hole 510 is engaged with the latch bar 400 So that the restraint of the latch bar 400 is released.

10, when the end of the slide bar 420 is located on the same line as the end of the turn bar 400, the latch bar 400 and the slide bar 420 are moved together The latch head 300 is moved into the receiving portion 130 of the latch housing and the guide body 200 is moved in the direction of the force F2 by the movement of the latch bar 400, .

11, when the stopper 500 is caught by the rear plate 120 of the latch housing 100 and the guide body 200 can not move any further, the latch bar 400 is pulled by the latch bar 400, The hinge 300 is rotated around the hinge to be bent.

As described above, according to another embodiment of the present invention, even if the force of F1 is applied to the latch head when the door is closed, the stopper hole of the stopper having the inclination restrains the movement of the latch bar, and at the same time, By restricting the movement of the latch bar, the rotation of the latch head is prevented and the closed state of the door is maintained.

When the door is opened, the slide bar is pulled and moved first in the direction of the force F2. By the movement of the slide bar, the support protrusion of the stopper is lifted and raised along the inclined surface of the protrusion, The stopper hole of the stopper releases the restraint of the latch bar, and as the latch bar is moved in a state where the restraint of the latch bar is released, the smooth movement of the latch bar and the smooth rotation of the latch head, And the noise generated when the door is opened is minimized.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to the specific embodiments described above. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the appended claims, And equivalents may be resorted to as falling within the scope of the invention.

100: latch housing 110: body
111: opening 120: rear plate
121: first through hole 122: hole
123: projection 130:
200: guide body 201: groove
210: first coupling part 220: second coupling part
230: second through hole 250: guide
251: guide slope 300: latch head
310: first coupling piece 311: hinge
312: spring 313: groove of curved surface
320: second coupling piece 321: long hole
330: elastic spring 340: step
400: Latch bar 401: Pinhole
402: pin 410: guide hole
420: slide bar 421: protruding jaw
422: slope 500: stopper
510: stopper hole 520: spring
530: support projection

Claims (9)

A latch housing having an opening communicating with the outside on one surface thereof and inserted and mounted on a side surface of the door;
A guide body movably coupled to the latch housing and including a first engaging portion protruding outward at an upper end of the first face and a second engaging portion protruding outward at an upper end of the back face;
A latch head hinged to an upper end of the first side of the guide body and protruding outside the opening;
A latch bar having one end coupled to the latch head and the other end coupled to an opening / closing unit interlocked with an operation of pushing or pulling the door handle through the center of the guide body and the latch housing;
A stopper hole through which the latch bar is passed is formed at one end of the stopper hole so as to be rotatably engaged with the second engaging part of the guide body and is fitted to the outside of the latch bar, The stopper hole restricts the movement of the latch bar to prevent rotation of the latch head. As the latch bar is vertically lifted by the force acting in the direction opposite to the spring when the latch bar is moved along with the opening of the door And a stopper hole releasing the latch bar and allowing the latch head to be rotated about the hinge. The method according to claim 1,
Wherein the stopper moves in conjunction with the guide body when the latch bar is moved along with the opening of the door, is vertically pushed by the latch housing, and the stopper hole releases the latching of the latch bar to allow rotation of the latch head. Door lock latch bolts. The method according to claim 1,
A guide bar is formed at the other end of the latch bar along the longitudinal direction, a slide bar having a length shorter than the latch bar and having a protruding protrusion of an inclined surface and the other end coupled to the opening / closing unit is movably coupled, The stopper is provided with a support protrusion which is caught by the protruding jaw of the inclined surface
When the slide bar is moved by the driving of the opening / closing unit, the base protrusion of the stopper is lifted up on the inclined surface of the protruding jaw so that the stopper is vertically erected and the stopper hole releases the latching of the latch bar to allow rotation of the latch head Wherein the latching bolt is a push-pull door lock bolt. The method according to claim 1,
Wherein the latch bar has a hexagonal cross-sectional shape, and the stopper hole through which the latch bar passes is hexagonal. 5. The method of claim 4,
Wherein the guide body and the latch housing are each formed with a through hole through which a latch bar passes, and the through hole is formed in a hexagonal or circular shape. The method according to claim 1,
And a resilient spring for resiliently urging the latch body to protrude outward from the opening of the latch housing by supporting the guide body by elastic force is provided between the rear surface of the guide body and the rear inner wall of the latch housing. volt. The method according to claim 1,
Wherein the latch housing comprises a hollow body having an opening formed on one side thereof and a rear plate covering the rear side of the hollow body. The method according to claim 1,
The latch head has a first coupling part protruded for hinge-coupling with the first coupling part, a curved groove is formed on a surface contacting the first coupling part, And a stepped portion formed at an opening of the latch housing is formed at a lower end of the arc-shaped surface of the latch head. The method according to claim 1,
Wherein a guide member having an induction slope is integrally provided at a lower end of the guide body so as to receive a lower end portion of the latch head rotated about the hinge when the latch bar is moved.

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