KR100669495B1 - Door-rock mechanism - Google Patents

Abstract

A door lock mechanism is provided to simplify the structure and to simply open a door by locking a locker block only by an inner handle without an element for unlocking the locker block from the indoor side. A door lock mechanism includes: a first slider(111) formed on the rear end of a locker block(110) and provided with first and second protrusions(111a,111b) separated from each other; a locker operating block(130) rotatably installed on a lock case(100) and equipped with an operating lever(132) selectively contacted to the first and second protrusions to interlock and insert or draw the locker block; a first interlocking block(140) combined with an inner handle and rotatably installed on the lock case; a second interlocking block(150) combined with an outer handle and joined with the first interlocking block to interlock with the first interlocking block; a second slider(121) joined to a latch block(120), slidably installed on the lock case, and pressed by the rotation of the second interlocking block; a first spring(122) interposed between the latch block and the second slider to return the latch block to the position protruded from a door by returning the second slider; and an intermediate unit disposed between the locker operating block and the first interlocking block to transmit rotation power of the first interlocking block to the locker operating block. The first interlocking block unlocks the locker block by rotating the inner handle in one direction and interlocks with the second interlocking block at the same time. The intermediate unit is rotated in the other direction by the second interlocking block and the locker operating block is turned in one direction by the intermediate unit.

Description

Door-rock mechanism

1 is a schematic perspective view showing a conventional door lock mechanism.

FIG. 2 is a schematic front view of the mechanism of FIG. 1 seen from the outside of the door; FIG.

3 is a perspective view showing a lock case employed in the mechanism of FIG.

Figure 4 is an exploded perspective view showing the door lock mechanism of the embodiment of the present invention.

5 is a schematic representation of the mechanism of an embodiment of the present invention with the door locked;

Figure 6 is a schematic diagram showing the operation of the door open with the inner handle in the room.

7 is a schematic diagram showing the operation of the latch block is retracted after the operating state shown in FIG.

FIG. 8 is a schematic diagram illustrating an operation of locking a locker block with an inner handle in a room in the operating state shown in FIG. 7; FIG.

FIG. 9 is a schematic diagram illustrating an operation in a state in which the locker block is locked with the outer handle outdoors in the operation state shown in FIG. 7; FIG.

FIG. 10 is a schematic view showing an operation in which the latch block is unlocked by the outer handle outdoors in the operating state shown in FIG. 9; FIG.

Figure 11 is a schematic diagram showing the main part of the embodiment of the present invention corresponding to the operating state of Figure 5;

Figure 12 is a schematic diagram showing the main part of the embodiment of the present invention corresponding to the operating state of Figure 6;

Figure 13 is a schematic diagram showing the main part of the embodiment of the present invention corresponding to the operating state of Figure 7;

Figure 14 is a schematic diagram showing the main part of the embodiment of the present invention corresponding to the operating state of Figure 8;

15 is a schematic diagram showing the main parts of an embodiment of the present invention corresponding to the operating state of FIG.

Figure 16 is a schematic diagram showing the main part of the embodiment of the present invention corresponding to the operating state of Figure 10;

17 is a schematic perspective view of a door employing a door lock mechanism according to an embodiment of the present invention.

* Explanation of symbols for main parts of drawings *

100.Lock Case 101

110 ... Locker Block 111 ... 1st Slider

111a ... the first jaw 111b ... the second jaw

120 ... latch block 121 ... 2nd slider

122 ... 1st spring 130 ... locker operation block

131 ... driven gear 132 ... operating lever

135: interlocking gear 140 ... 1st interlocking block

141c ... sector home 141d ... first rush

143 ... 1st linked jaw 145 ... 2nd linked jaw

147 ... 3rd linked jaw 150 ... 2nd linked block

151 Hollow body 152

152a ... Second Extrusion 152b ... Job Jam

155 ... 2nd spring 160 ... latch operation block

161 ... Section 162

170 Drive Motor 171 Drive Gear

180 ... parameter block 182: parameter gear

184 Medium lever 200 Door

201 Inner handle 202 Outer handle

203 ... Operation panel 205 ... Locker operating lever

c ...

The present invention relates to a door lock mechanism, and in particular, when the door is manually opened in the room, the locker block and the latch block can be simultaneously opened in one operation to facilitate the opening of the door, and the digital device outdoors. The present invention relates to a door lock mechanism whose structure is improved to enable manual locking outdoors when it is impossible to automatically lock and unlock the door by using the door, and to lock the door in a simplified configuration even indoors.

In general door lock mechanism, a locker block that locks the door so that the door cannot be opened without a key or password operation from the outside, and a latch that freely comes out according to the inside / external handle operation while keeping the door closed. A block is provided.

1 to 3 show a conventional door lock mechanism employing the locker block and latch block.

A lock case 30 is assembled inside the door (not shown), and an inner body 10 provided with an inner handle 11 and a locker operating lever 12 is assembled on an inner surface of the door, and an outer surface of the door The outer body 20 provided with the outer handle 21 and the number manipulation panel 22 is assembled.

In the lock case 30 to which the locker block 31 and the latch block 32 are removably coupled, the locker operating tool 34 and the latch block 32 which are rotatably operated to project the locker block 31 in and out. The latch operating mechanism 33 is rotatably assembled so as to project the light.

The inner handle 11 and the outer handle 21 are coupled to the latch operation tool 33, and the latch block 32 is mounted by the rotation operation of the handles 11 and 21.

In addition, the rocker operating lever 12 is coupled to the locker operating lever 12, and the locker block 31 is roamed by the rotational operation of the locker operating lever 12.

The conventional door lock mechanism of the above configuration is operated as follows.

First, when the door is opened from the outside, when the password is pressed through the number manipulation panel 22, a motor (not shown) built in the lock case 30 is driven to unlock the locker block 31. Next, the door can be opened by operating the outer handle 21 to unlock the latch block 32.

When the door is opened indoors, first, the locker operating lever 12 is rotated to unlock the locker block 31, and then the inner handle 11 is rotated to unlock the latch block 32. The door can be opened.

However, in the conventional door lock mechanism as described above, when the door is opened in the room, the locker operation lever 12 and the inner handle 11 must be operated separately in sequence so that the door opening operation in the room is cumbersome.

In addition, when the door is locked indoors, the locker operating lever 12 provided separately from the inner handle 11 should be rotated, so that the door needs to be locked only by the inner handle 11 to simplify the configuration. In addition, when the locker operating lever 12 becomes inoperative, the door cannot be locked.

In addition, even when the door cannot be automatically locked outdoors due to a failure of the digital device composed of the number control panel 22 and the motor, the door cannot be locked outdoors.

Therefore, product development is needed to overcome the above problems. In such a product, the latch block and the locker block must be unlocked to open the door, and the rotation direction of the inner handle for unlocking the latch block coincides with the rotation direction of the locker operating lever for unlocking the locker block. It is necessary to provide convenience to the user.

The present invention has been made to solve the above problems, and has the following objectives.

First, the purpose of the present invention is to provide a door lock mechanism that allows the locker block and the latch block to be unlocked at the same time with only one handle operation when opening the door in the room.

Second, an object of the present invention is to provide a door lock mechanism that enables locking of the locker block by using an inner handle that unlocks the latch block when the door is locked indoors.

Third, an object of the present invention is to provide a door lock mechanism that enables locking of the locker block by using an outer handle that unlocks the latch block when the door is locked outdoors.

Fourthly, an object of the present invention is to provide a door lock mechanism capable of matching the rotation direction of the inner handle for unlocking the latch block and the rotation direction of the locker operating lever for unlocking the locker block.

The present invention for achieving the above object is a lock case built in the edge side of the door, a locker block accommodated in the lock case and installed so as to be protruded to the edge side of the door to lock or unlock the door, and A latch block capable of maintaining a closed state of the door in an unlocked state of the locker block and being provided to be protruded from the lock case, and an outer handle for interlocking the latch block so that the latch block is protruded from the outside of the door; In the door lock mechanism for locking / unlocking the door having an inner handle for interlocking the latch block so that the latch block emerges from the inside of the door,

A first slider having a first jaw and a second jaw formed at a predetermined distance from the rear end of the locker block is formed, is rotatably installed on the lock case, and selectively contacts the first jaw and the second jaw. A locker operating block having an operating lever for interlocking the locker block; A first interlocking block coupled to the inner handle and rotatably installed on the lock case; A second interlocking block coupled to the outer handle and coupled to the first interlocking block to be interlockable with the first interlocking block; A second slider coupled to the latch block and slidably installed in the lock case, the second slider being pressed according to the rotation of the second interlocking block; A first spring disposed between the latch block and the second slider and configured to restore the second slider so that the latch block is restored to a position protruding from the door; And an intermediary means provided between the rocker operating block and the first interlocking block to transmit the rotational force of the first interlocking block to the rocker operating block.

Rotate the inner handle in one direction so that the first interlocking block unlocks the locker block, and at the same time, the first interlocking block interlocks the second interlocking block, and the second interlocking block permits the intermediary means. Is rotated in the other direction, characterized in that the locker operating block is configured to rotate in one direction by the intermediate means.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, referring to FIGS. 4, 5, 6, and 11, 12, the latch block 120 and the locker block 110 are simultaneously unlocked using only the inner handle 201 to open the door 200 simply. It will be described the configuration and operation to enable.

The lock case 100 is built in the edge side of the door 200, and the locker block 110 and the latch block 120 are installed at predetermined intervals. That is, the locker block 110 and the latch block 120 are installed in the lock case 100 such that the respective front end portions can be sunk toward the edge of the door 200.

Here, the means for unlocking the locker block 110 by rotating the inner handle 201 (see FIG. 17) disposed in the interior side in one direction (clockwise direction; the direction in which the latch block is unlocked) will be described. .

At the rear end of the locker block 110, a first slider 111 slidably installed in the lock case 100 is formed. The first slider 111 has a first jaw 111a and a second jaw 111b formed at predetermined intervals.

The first slider 111 is operated by the locker operating block 130 rotatably installed in the lock case 100. That is, the locker operating block 130 is provided with an operating lever 132. The operation lever 132 extends from the body in which the insertion hole 130a is formed, and selectively contacts the first and second jaws 111a and 111b to project the locker block 110. Here, the locker operating lever 205 (see FIG. 17) for locking or unlocking the locker block 110 is inserted into the insertion hole 130a.

The locker operating block 130 has a driven gear 131 and an interlocking gear 135. The driven gear 131 is provided at a predetermined interval along the circumferential direction of the rocker operation block 130, and is connected to the drive gear 171 of the motor 170 to operate the rocker to operate the rotational force of the drive gear 171. It serves to deliver to block 130. The interlocking gear 135 is gear-connected with the intermediate gear 182 of the intermediate block 180 to be described below.

On the other hand, the locker operation block 130 is interlocked by the first interlocking block 140. An inner handle coupling hole 141a is formed in the first interlocking block 140. The inner handle 201 is coupled to the first interlocking block 140 while being fitted into the inner handle coupling hole 141a. In addition, the first interlocking block 140 has a first interlocking jaw 143 and a second interlocking jaw 145 provided to be spaced apart from each other by a predetermined interval.

Here, the mediation means for transmitting the rotational force of the first interlocking block 140 to the locker operation block 130 will be described. The intermediate means includes the interlocking gear 135, the intermediate block 180, and the first and second interlocking jaws 143 and 145.

The intermediate block 180 is rotatably installed in the lock case 100, and is provided between the locker operation block 130 and the first interlocking block 140, and gear connected to the interlocking gear 135. The intermediate gear 182 and the intermediate lever 184 to receive the rotational force from the first interlocking block 140.

The first interlocking jaw 143 presses one end of the intermediate lever 184 when the inner handle 201 is rotated in the one direction, and the second interlocking jaw 145 is the inner handle ( When 201) is rotated in the other direction (counterclockwise), it serves to press the other end of the intermediate lever 184.

The door lock mechanism having such a configuration can unlock the locker block 110 by rotating the inner handle 201 coupled to the first interlocking block 140 in one direction. That is, when the inner handle 140 is rotated in one direction, the intermediate lever 184 is pressed by the first interlocking jaw 143 so that the intermediate block 180 is rotated in the other direction (counterclockwise direction). The locker operating block 130 is rotated in one direction by the interlocking gear 135 receiving the rotational force of the intermediate block 180 from the intermediate gear 182. In this case, the latch block 110 is unlocked by the operation lever 132 pressing the second jaw 111b of the first slider 111.

As such, the present invention has the advantage of being able to lock the locker block 110 with only the inner handle 201 to easily open the door 200.

Hereinafter, a means for simultaneously unlocking the locker block 110 and the latch block 120 by rotating the inner handle 201 will be described.

The first interlocking block 140 is provided with a sector groove 141c in a circumferential direction along the circumferential direction, and a third interlocking jaw 147 stepped due to the formation of the sector groove 141c is provided. The first interlocking block 140 is rotatably coupled to the second interlocking block 150 having a hollow body 151 and a locking lever 152 extending from the hollow body 151. That is, the hollow body 151 of the second interlocking block 150 is concentrically coupled to the inner side of the first interlocking block 140, and the latch lever of the second interlocking block 150 is connected to the sector groove 141c. 152 is fitted.

As such, when the locking lever 152 rotates the inner handle 201 in one direction while being fitted in the sector groove 141c, the first interlocking jaw 140 rotates in one direction and the third interlocking jaw ( 147 presses the locking lever 152, and the second interlocking block 150 rotates in one direction.

When the second interlocking block 150 is rotated, the locking jaw 152b formed at the tip of the locking lever 152 rotates the latch operation block 160 rotatably installed in the lock case 100. . That is, the latch operation block 160 includes a locking portion 161 caught by the locking jaw 152b and an operating portion 162 spaced apart from the locking portion 161 by a predetermined angle. 152b) presses the locking portion 161 to rotate the latch operation block 160.

At this time, the acting portion 162 of the latch operation block 160 slides the second slider 121 that is slidably installed in the lock case 100. That is, the second slider 121 is slid by being pressed by the acting portion 162, so that the latch block 120 coupled to the second slider 121 is moved into the door 200. It is pulled in.

When the inner handle 201 is rotated in one direction by the configuration of the present invention, the lock block 120 is unlocked and the locker block 110 is unlocked at the same time as the second slider 121 moves. do.

As described above, the locker block 110 and the latch block 120 can be unlocked at the same time by operating only the inner handle 201 indoors, thereby making it easier to open the door 200. In addition, the rotation direction of the locker operation block 130 rotated to unlock the locker block 110 and the first interlocking block 140 rotated to unlock the lock block 120 by the intermediate means. By coinciding, confusion of the user due to the mismatch of the rotation directions when the door 200 is opened can be prevented, thereby providing convenience to the user.

That is, when the rotation direction does not match, when the user unlocks the locker block 110 by using the locker operating lever 205, the inner handle 201 for unlocking the latch block 120. Since the locker operating lever 205 needs to be rotated in a direction opposite to the rotation direction, when the locker block 110 is required to be locked, the locker block 110 is unlocked and, on the contrary, the unlocking of the locker block 110 is required. When the locker block 110 is locked when it occurs. However, this problem is solved by the intermediary means provided in the present invention.

On the other hand, the restoring means for restoring the latch block 120, the first interlocking block 140 and the second interlocking block 150 to the original position after the operation state shown in FIG. It is as follows.

Restoration means for restoring the latch block 120 to its original position includes a first spring 122 disposed between the latch block 120 and the second slider 121. The first spring 122 serves to restore the latch block 120 to a position protruding from the door 200. Therefore, when the latch block 120 is unlocked to open the door 200 and then the door 200 is closed, the latch block 120 is restored to a position for locking the door 200.

In addition, the restoring means for restoring the first interlocking block 140 and the second interlocking block 150 to an original position is as follows.

That is, the restoring means includes a locking piece 101, first and second protrusion pieces 141d and 152a, and a second spring 155. Here, the locking piece 101 protrudes from the inner surface of the lock case 100 to the inside of the lock case 100, and the first protrusion 141d protrudes from the first link block 140. The second protrusion piece 152a is formed to protrude from the locking lever 152 of the second interlocking block 150.

The second spring 155 is a circular ring portion 155a seated on the body portion 141 of the first interlocking block 140 and first and second extension portions 155b extending from the circular ring portion 155a. , 155c). The first and second extension parts 155b and 155c may include the locking piece 101 and the first and second protrusion pieces while the locking pieces 101 and the first and second protrusion pieces 141d and 152a are aligned in a straight line. Contact with both side surfaces of the first and second protrusions 141d and 152a, and elastically deform by the rotation of the first and second protrusions 141d and 152a, respectively, to restore the first and second protrusions 141d and 152a to their original positions. . Therefore, the first interlocking block 140 and the second interlocking block 150 are restored to their original positions by the second spring 155.

Next, the configuration and operation of locking the locker block 110 by rotating the inner handle 201 in the other direction (counterclockwise; direction in which the locker block is unlocked) will be described with reference to FIGS. 8 and 14. do.

In the state in which the locker block 110 is unlocked, the intermediate lever 184 is in contact with the second interlocking jaw 145 side of the first interlocking block 140. Here, the sector groove 141c of the first interlocking block 140 has an empty section c. The idle section c allows the first interlocking block 140 and the second interlocking block 150 to rotate relative to each other without interfering with each other.

According to the configuration of the present invention, when the inner handle 201 coupled to the first interlocking block 140 rotates in the other direction, the second interlocking jaw 145 presses the intermediate lever 184. Accordingly, the intermediate block 180 is rotated in one direction. As the locker operation block 130 rotates in one direction by the rotation of the intermediate block 180, the locker block 110 is locked by pressing the first jaw 111a of the first slider 111. .

On the other hand, according to the configuration of the present invention, if the outer handle 202 (see Fig. 17) coupled to the second interlocking block 150 is rotated in one direction (clockwise; the direction in which the latch block is unlocked), Fig. 10 As illustrated in FIG. 16, the locking lever 152 is rotated in the idle section c such that the second interlocking block 150 does not interfere with the first interlocking block 140. Therefore, it is possible to prevent the locker block 110 from being unlocked only by the operation of the outer handle 202.

As described above, the present invention has the advantage of locking the locker block 110 while maintaining the locking state of the latch block 120 by operating only the inner handle 201, the outer handle 202 Only by the operation of the locker block 110 has the advantage of not being unlocked.

Hereinafter, the configuration and operation of locking the locker block by manipulating the outer handle outdoors will be described with reference to FIGS. 9 and 15.

An outer handle coupling hole 151a to which the outer handle 202 (see FIG. 17) is coupled is formed in the second interlocking block 150. Therefore, when the outer handle 202 is rotated in the other direction (counterclockwise; direction in which the locker block is locked), the second interlocking block 150 rotates.

When the outer handle 202 is rotated in the other direction, the locking lever 152 presses the third interlocking jaw 147, so that the first interlocking block 140 is the second interlocking block. It is rotated in the other direction together with 150.

The intermediate block 180 is rotated in one direction by the rotation of the first interlocking block 140, and the locker operation block 130 is rotated in the other direction by the rotation of the intermediate block 180. In this case, the operating lever 132 of the locker operating block 130 presses the first jaw 111a of the first slider 111, thereby locking the locker block 110.

As described above, the locker block 110 may be locked by operating the outer handle 202, so that the locking of the door 200 may be smoothly and the locker block 110 may be automatically locked. Even when a digital device cannot be used, the locker block 110 may be manually locked.

Hereinafter, a configuration of automatically locking and unlocking the locker block will be described with reference to FIG. 17.

The locker operation block 130 is provided with a driven gear 131. The driven gear 131 is gear-connected to the drive gear 171 driven by the drive motor 170 for generating power. The number manipulation panel 203 is installed outside the door 200. As such, when the number manipulation panel 203 is operated outdoors in a digital device including the drive motor 170, the drive gear 171, and the number manipulation panel 203, the operation signal is inputted to the drive motor 170. There is provided a control unit (not shown) for operating.

 Therefore, when the password is manipulated through the number manipulation panel 203, an electric signal is applied to the driving motor 170 through the control unit to drive the driving motor 170, and the driving gear 171 and the driven gear ( 131 is sequentially rotated.

In this case, the locker operation block 130, the first slider 111 and the rocker block 110 are sequentially driven to lock or unlock the locker block.

As mentioned above, although preferred embodiment about this invention was described, this invention is not limited to the above-mentioned embodiment, It is defined by what was described in the claim, and it is clear that various deformation | transformation and adaptation are possible in the technical field to which this invention belongs. Do.

The following effects are expected for the door lock mechanism according to the present invention as described above.

First, the present invention does not require a separate component for unlocking the locker block in the room side, it is possible to lock the locker block with only the inner handle, there is an advantage that the configuration is simplified and the door can be easily opened.

Second, the present invention can lock the locker block with only the inner handle in the room, there is no need for a separate configuration for locking the locker block has the advantage that the configuration is simplified and the door can be easily locked.

Third, the present invention can lock the locker block with only the outer handle in the outdoors, so that the locker block can be locked even when a digital device capable of automatically locking the locker block is not driven.

Fourth, the present invention has the advantage that the locker operation block is rotated to unlock the locker block and the rotation direction of the first interlocking block is rotated to unlock the latch block by the mediation means, it can provide a user convenience Has

In addition, the present invention is provided with a spaced section so that the first interlocking block and the second interlocking block can be rotated without interference, respectively, so that the locker block can be locked while the locking of the latch block is maintained. This has the advantage of smoothing the locking. In addition, the present invention has an advantage of preventing the unlocking of the locker block by operating the outer handle outdoors.

Claims (6)

A lock case built in the edge side of the door, a locker block accommodated in the lock case and protruded to the edge of the door to lock or unlock the door, and a locker block in the unlocked state of the locker block. A latch block provided to be able to be held in the lock case and retractable to the lock case, an outer handle which interlocks the latch block so that the latch block emerges from the outside of the door, and the latch block is provided inside the door. A door lock mechanism for locking / unlocking a door by having an inner handle for interlocking the latch block so as to be protruded, A first slider 111 having a first jaw 111a and a second jaw 111b formed at a predetermined interval at a rear end of the locker block 110 is formed. It is rotatably installed in the lock case 100, and has a working lever 132 for selectively contacting the first jaw (111a) and the second jaw (111b) to go out in conjunction with the locker block 110. A locker operating block 130; A first interlocking block 140 coupled to the inner handle 201 and rotatably installed on the lock case 100; A second interlocking block (150) coupled to the outer handle (202) and coupled to the first interlocking block (140) so as to interlock with the first interlocking block (140); A second slider (121) coupled to the latch block (120) and slidably installed in the lock case (100) and pressed according to the rotation of the second interlocking block (150); A first spring 122 disposed between the latch block 120 and the second slider 121 and restoring the second slider 121 so that the latch block 120 is restored to a position protruding from the door; ; And It is provided between the locker operation block 130 and the first interlocking block 140, and provided with a mediation means for transmitting the rotational force of the first interlocking block 140 to the rocker operation block 130, Rotating the inner handle 201 in one direction to allow the first interlocking block 140 to unlock the locker block 110, and at the same time the first interlocking block 140 to the second interlocking block 150. The interlock means is rotated in another direction by the second interlocking block (150), and the locker operating block (130) is rotated in one direction by the intermediary means. The method of claim 1, The mediation means is: An interlocking gear 135 provided in the locker operation block 130; A medial gear 182 geared to the interlocking gear 135 and a medial lever 184 that receives rotational force from the first interlocking block 140 and is rotatably installed in the lock case 100, An intermediate block 180 provided between the locker operation block 130 and the first interlocking block 140; A first interlocking jaw 143 provided on the first interlocking block 140 to press one side of the intermediate lever 184; And And a second interlocking jaw 145 provided at a position spaced apart from the first interlocking jaw 143 in the first interlocking block 140 and pressing the other side of the intermediate lever 184. Door lock mechanism. The method of claim 2, The first interlocking block 140 is provided with a sector groove 141c along a circumferential direction. The second interlocking block 150 has a hollow body 151 which is concentrically coupled to the inner side of the first interlocking block 140 and a locking lever that extends from the hollow body 151 and fits into the sector groove 141c. 152 is provided, When the inner handle 201 is rotated in the one direction, the latching block 152 that is engaged on one side of the sector groove 140c is interlocked so that the latch block 120 is unlocked. . The method of claim 3, The sector groove 140c is provided with a spaced section c such that the locking lever 152 fitted into the sector groove 140c does not interfere with the body portion 141. When the inner handle 201 coupled to the first interlocking block 140 is rotated in the other direction opposite to the one direction, the first interlocking block 140 is engaged by the locking section c. Rotated without interference with 152 to maintain locking of the latch block 120, When the outer handle 202 coupled to the second interlocking block 150 is rotated in one direction, the locking lever 152 is rotated in the idle section c so that the locking of the locker block 120 is maintained. The door lock mechanism characterized by the above-mentioned. The method according to any one of claims 3 to 4, Rotatably installed in the lock case 100 and disposed between the second slider 121 and the second interlocking block 150 to interlock the second slider 121 and the second interlocking block 150. Further provided with a latch operation block 160 for mounting the latch block 120, The latch operation block 160 includes a catching portion 162 that is caught on the front end of the catching lever 152; And a working part 162 formed to be spaced apart from the locking part 162 by a predetermined angle to press the second slider 121. The method of claim 5, An inner surface of the lock case 100 is provided with a locking piece 101 protruding inward of the lock case 100, The first interlocking block 140 is provided with a first protrusion piece 141d, The engaging lever 152 of the second interlocking block 150 is provided with a second protrusion piece 152a, And a second spring 155 having a circular ring portion 155a seated on the first interlocking block 140 and first and second extension portions 155b and 155c extending from the circular ring portion 155a. , The first and second extension parts 155b and 155c may have the locking pieces 101 and the first and second protrusions while the locking pieces 101 and the first and second protrusion pieces 141d and 152a are aligned in a straight line. Contacting both sides of the pieces 141d and 152a, respectively, and elastically deformed by rotation of the first and second protruding pieces 141d and 152a, and then restoring the first and second protruding pieces 141d and 152a to their original positions, respectively. The door lock mechanism characterized by the above-mentioned.

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