CN214996743U - Lock for air film building passage door - Google Patents

Abstract

A lockset for a passage door of a gas film building relates to the technical field of locksets. The lock comprises a lock body and a lock catch, wherein a key hole is formed in one side of the lock body, a cavity containing hole is formed in the lock catch, a press head seat is arranged on one side, close to the cavity containing hole, of the lock catch, and the lock body comprises a lock box; the lock head is arranged in the lock box and can be inserted into the cavity hole; the poking block is rotatably assembled in the lock box; one end of the linkage component is connected with the lock head, and the other end of the linkage component is in linkage connection with the toggle block; the knob is arranged on one side of the lock box, which is far away from the key hole, and is connected with the poking block; the locking assembly is arranged in the lock box and used for locking the shifting block when the lock head is retracted into the lock block; the pressure head assembly is arranged on the lock box, one end of the pressure head assembly can be connected with the pressure head seat in an inserting mode, and the other end of the pressure head assembly is connected with the stopping assembly in a linkage mode.

Description

Lock for air film building passage door

Technical Field

The utility model relates to a tool to lock technical field, concretely relates to tool to lock that is used for air film building access door.

Background

The indoor of the air film building is usually provided with positive pressure, and the air film building is usually applied to places with serious dust pollution, such as an air film coal power plant, a garbage disposal plant, an air film gymnasium and the like. The lock tongue of the existing door lock has no stop device after the lock is opened, the lock tongue can not automatically reset, and if the lock tongue is in an extending state, the lock can be damaged when the door is closed.

Therefore, improvements are desired.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to prior art's defect and not enough, provide a tool to lock for air film building access door, have and be applicable to air film building, convenient to use, have locking function and reset function, avoid the dust in the air film building to block up key hole or lock head hole and cause the advantage of lock body trouble.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a tool to lock for gas film building access door, includes lock body and hasp, be provided with the key hole on lock body one side, be provided with on the hasp and hold the chamber hole, be close to on the hasp hold chamber hole one side and be provided with the pressure head seat, the lock body includes: a lock case; the lock head is arranged in the lock box and can be inserted into the cavity hole; the shifting block is rotatably assembled in the lock box; one end of the linkage component is connected with the lock head, and the other end of the linkage component is in linkage connection with the toggle block; the knob is arranged on one side of the lock box, which is far away from the key hole, and is connected with the poking block; the locking assembly is arranged in the lock box and used for locking the poking block when the lock head is retracted in the lock box; and the pressure head assembly is arranged on the lock box, one end of the pressure head assembly can be connected with the pressure head seat in an inserting mode, the other end of the pressure head assembly is connected with the stopping assembly in a linkage mode, when the stopping assembly stops the poking block and the pressure head seat is separated from the pressure head assembly, the pressure head assembly drives the stopping assembly to stop the poking block under the driving of self restoring force, and the linkage assembly drives the poking block to open and reset and drives the lock head to stretch out to one side, away from the lock box, under the driving of the self restoring force.

Be provided with first holding tank in the lock box, be located on the lock box first holding tank both sides are provided with and are used for supplying the first movable hole that the tapered end wore to establish, be close to on the lock box linkage subassembly one side is provided with and is used for the restriction stir a piece turned angle's spacing groove, the linkage subassembly includes: the first spring is arranged in the first accommodating groove and sleeved on the lock head; the first limiting column is arranged on the lock head and is inserted and connected to the first spring; and one end of the first connecting rod is hinged to one end of the lock head, and the other end of the first connecting rod is hinged to one end of the toggle block.

Be close to on the lock box stir piece one side and be provided with the second movable hole, it keeps away from on the stir piece first connecting rod one end is provided with protruding joint portion, the locking subassembly includes: the movable frame is rotatably assembled in the second movable hole; and the spring pin penetrates through the movable frame and can be used for being clamped with the protruding clamping part under the driving of self restoring force so as to stop the shifting block.

Be provided with the second holding tank that corresponds the setting with first holding tank in the lock box, be located on the lock box second holding tank both sides are provided with the third activity hole, the pressure head subassembly includes: the pressure head penetrates through the third movable hole, is arranged in parallel with the lock head, and has one end capable of being inserted into the pressure head seat;

the second spring is arranged in the second accommodating groove and sleeved on the pressure head; the second limiting column is fixedly arranged on the pressure head and is in inserted connection with the second spring; and one end of the second connecting rod is hinged with one end of the pressure head, which is far away from the pressure head seat, and the other end of the second connecting rod is hinged with the movable frame.

Keep away from on the pressure head second connecting rod one end is provided with the mounting groove, the mounting groove is located outside the lock box, the rotation type is equipped with the gyro wheel on the mounting groove.

And a locking component is arranged in the cavity hole of the lock catch, and when the lock head is inserted in the cavity hole, the locking component is tightly clamped with the lock head under the driving of self restoring force.

The locking assembly includes: the locking block is rotatably assembled in the accommodating cavity hole in the lock catch through a rotating shaft, and a locking hole matched with one end, far away from the shifting block, of the lock head is formed in the locking block; and the number of the first and second groups,

set up in locking piece both sides and cover are located epaxial, one end is spacing in on the hasp and be located axis of rotation one side, the other end are fixed in on the locking piece and be located the torsional spring of axis of rotation opposite side.

The lock is characterized in that a limiting rod is arranged in the cavity hole in the lock catch and positioned on one side of the rotating shaft, a positioning hole is formed between the limiting rod and the lock catch, and one end, far away from the locking block, of the torsional spring is limited in the positioning hole.

The locking hole is rectangular, one side of the lock head far away from one end of the lock box is triangular, and the other side of the lock head is semicircular.

The locking block is hook-shaped.

After the technical scheme is adopted, the utility model discloses beneficial effect does:

1. the positive pressure in the air film building makes the one-hand unlocking and door opening very laborious and inconvenient to operate, the locking assembly, the linkage assembly, the toggle block and the pressure head assembly on the lock body are arranged so that the knob can be rotated to unlock the lock conveniently, the knob can be loosened so that the user can conveniently open the door with both hands, the lock head resets and extends out of the lock box after the door is opened, a key hole is not arranged on one side, close to the air film building, of the lock body, dust is prevented from entering from the key hole and the lock head hole, and the lock body is prevented from being broken down due to the fact that the dust blocks the key hole or the lock head hole.

2. The locking assembly is arranged in the cavity hole of the lock catch, and when the lock head is inserted in the cavity hole, the locking assembly is tightly clamped with the lock head under the driving of self restoring force. When the door is closed, the door leaf is pushed to move towards the outside of the air film building, the lock head can impact the lock block on the lock catch to enable the lock block to rotate, and meanwhile, the pressure head can be extruded by the pressure head seat to enable the pressure head to retract and drive the spring pin to be in a pre-locking state. After the door is closed in place, the lock block on the lock catch tightly clamps the lock head under the action of the torsion spring.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of the present invention;

fig. 2 is an exploded schematic view of the present invention;

FIG. 3 is a schematic view of the lock body in a state where the lock body is unlocked by rotating the knob or key;

FIG. 4 is a schematic view of the lock and ram automatically returning to their original positions when the door is opened;

fig. 5 is a first structural schematic view of the lock of the present invention;

fig. 6 is a schematic view of a second structure of the lock of the present invention.

Description of reference numerals: 1. a lock body; 2. locking; a. a cavity hole; 21. a press head seat; 11. a lock case; 12. a lock head; 13. a shifting block; 14. a linkage assembly; 15. a knob; 16. a stop assembly; 17. a ram assembly; 18. a positioning column; b. a first accommodating groove; 141. a first spring; 142. a first limit post; 143. a first link; 19. a lock cylinder holder; c. a second movable hole; 131. a raised clamping part; 161. a movable frame; 162. a spring pin; 171. a pressure head; 172. a second spring; 173. a second limit post; 174. a second link; 10. a first fixing frame; 20. a second fixing frame; 175. a roller; 22. a locking assembly; 221. a rotating shaft; 222. a locking block; 223. a torsion spring; 224. a limiting rod; e. and (7) positioning the holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment as required without making a contribution, but all the embodiments are protected by the patent law within the scope of the claims of the present invention.

This embodiment relates to a tool to lock for air film building access door, as shown in fig. 1, 2, including lock body 1 and hasp 2, be provided with the key hole on lock body 1 one side, be provided with on the hasp 2 and hold locular hole a, be close to on the hasp 2 and hold locular hole a one side and be provided with pressure head seat 21, lock body 1 includes: lock box 11, tapered end 12, setting aside piece 13, linkage assembly 14, knob 15, stop assembly 16 and pressure head assembly 17.

The lock head 12 is arranged in the lock box 11 and can be inserted into the cavity hole a. The tumbler 13 is rotatably mounted in the lock case 11. One end of the linkage component 14 is connected with the lock head 12, and the other end is connected with the toggle block 13 in a linkage manner. The knob 15 is arranged on the side of the lock box 11 far away from the key hole and is connected with the poking block 13. The stopping assembly 16 is disposed in the lock box 11 and is used for stopping the moving block 13 when the lock head 12 is retracted in the lock box 11. The pressure head assembly 17 is arranged on the lock box 11, one end of the pressure head assembly 17 can be inserted into the pressure head seat 21, the other end of the pressure head assembly 17 is in linkage connection with the stopping assembly 16, when the stopping assembly 16 stops the shifting block 13 and the pressure head seat 21 is separated from the pressure head assembly 17, the pressure head assembly 17 drives the stopping assembly 16 to release stopping action on the shifting block 13 under the driving of self restoring force, and the linkage assembly 14 drives the shifting block 13 to open and reset under the driving of the self restoring force and drives the lock head 12 to extend to one side far away from the lock box 11.

It should be noted that the lock body 1 is fixed on the door, the lock catch 2 is fixedly installed on the door frame of the air film building, and the knob 15 is arranged on the door close to the indoor side of the air film building. When the door is in a closed state and the lock body 1 is in a locked state, the lock head 12 is inserted into the cavity containing hole a, the pressure head assembly 17 is compressed by the pressure head seat 21 on the lock catch 2, thereby moving the stop assembly 16 such that the stop assembly 16 is in a pre-lock state, which, when the knob 15 is rotated or the lock is unlocked with a key, the knob 15 or the key drives the dial block 13 to rotate, the dial block 13 drives the lock head 12 to retract to one side close to the lock box 11 through the linkage component 14, and the stop assembly 16 stops the dial block 13 under the driving of the self-restoring force, the user can release the key or knob 15, then the door is opened by using two hands, when the door is opened, the pressure head assembly 17 moves to the side far away from the lock box 11 under the drive of the self-restoring force, thereby driving the stopping component 16 and the shifting block 13 to release the stopping, so that the shifting block 13 rotates and resets to drive the linkage component 14 to move, and the linkage component 14 drives the lock head 12 to move towards the side far away from the lock box 11 under the driving of the self restoring force. Because the positive pressure in the air film building makes the one-hand unlocking to open the door very laboursome, inconvenient operation, locking subassembly 16 on the lock body 1, linkage subassembly 14, dial piece 13, when the setting of pressure head subassembly 17 is convenient for rotatory knob 15 to open the lock, can loosen knob 15 and be convenient for the user both hands to open the door, lock 12 resets and stretches out lock box 11 after the door is opened, be close to air film building one side on the lock body 1 and do not set up the key hole, avoid the dust to get into from key hole and lock 12 holes, avoid the lock body 1 to make the lock body 1 break down because the dust blocks up key hole or lock 12 holes.

Preferably, as shown in fig. 3 and 4, in order to realize the linkage of the dial block 13 and the lock head 12, it is convenient to realize that the lock head 12 retracts into the lock box 11 or the lock head 12 extends out of the lock box 11, a first accommodating groove b is provided in the lock box 11, first movable holes for the lock head 12 to penetrate are provided on the lock box 11 at two sides of the first accommodating groove b, a limit groove for limiting the rotation angle of the dial block 13 is provided on one side of the lock box 11 close to the linkage component 14, in this embodiment, two positioning columns 18 are provided on two sides of the dial block 13 in the lock box 11, and the two positioning columns 18 surround to form the limit groove. The linkage assembly 14 includes: a first spring 141, a first limit column 142 and a first connecting rod 143. The first spring 141 is disposed in the first accommodating groove b and sleeved on the lock head 12. The first position-limiting column 142 is disposed on the lock head 12 and is inserted into the first spring 141. One end of the first connecting rod 143 is hinged to one end of the lock head 12, and the other end is hinged to one end of the toggle block 13.

In this embodiment, a lock cylinder support 19 is arranged in the lock box 11, the lock cylinder support 19 is fixed in the lock box 11 through a screw, the knob 15 is arranged between the lock cylinders in a penetrating manner and is connected with the dial block 13, and the dial block 13 and the stop component 16 are both located on the lock cylinder support 19. A first fixing frame 10 is arranged in the lock box 11, the first fixing frame 10 is fixed in the lock box 11 through screws, and the first accommodating groove b and the first movable hole are both arranged on the first fixing frame 10. In other embodiments, the linkage assembly 14 includes a right-angle connection, a first spring 141, and a first restraint post 142. The right-angle connecting part and the toggle block 13 are integrally formed, and the right-angle connecting part is fixedly connected with one end of the lock head 12. The first spring 141 is sleeved on the lock head 12, and the first position-limiting column 142 is vertically fixed on the lock head 12 and inserted into the first spring 141.

Preferably, as shown in fig. 3 and 4, a second movable hole c is formed in the lock case 11 on a side close to the toggle block 13, and a protruding latch portion 131 is formed at an end of the toggle block 13 away from the first link 143, where the protruding latch portion 131 is in a hook shape. The stopper assembly 16 includes: a movable frame 161 and a spring pin 162. The movable frame 161 is rotatably fitted in the second movable hole c. The spring pin 162 is arranged on the movable frame 161 in a penetrating manner and can be used for being clamped with the convex clamping portion 131 under the driving of self restoring force so as to stop the poking block 13. In the present embodiment, the second movable hole c is provided on the movable frame 161. In other embodiments, the stopping assembly 16 includes a movable frame 161 rotatably mounted on the lock box 11 and a spring pin fixedly disposed on the movable frame 161.

Preferably, in order to realize the resetting of the lock block 222 and the unlocking action between the locking assembly 16 and the dial block 13, the pressure head assembly 17 and the lock head 12 are reset to extend out of the lock box 11. Be provided with the second holding tank that corresponds the setting with first holding tank b in the lock box 11, it is provided with third activity hole to lie in second holding tank both sides on the lock box 11, and pressure head subassembly 17 includes: a ram 171, a second spring 172, a second restraint post 173, and a second link 174. The pressing head 171 is disposed through the third movable hole, parallel to the locking head 12, and one end thereof can be inserted into the pressing head seat 21. The second spring 172 is disposed in the second receiving groove and sleeved on the pressing head 171. The second position-limiting post 173 is fixedly disposed on the pressing head 171 and is inserted into the second spring 172. One end of the second link 174 is hinged to one end of the ram 171 away from the ram seat 21, and the other end is hinged to the movable frame 161. In other embodiments, the pressing head assembly 17 includes a pressing head 171, a second spring 172 and a second limiting post 173, one end of the pressing head 171 is fixedly connected to the movable frame 161, and the pressing head 171 is L-shaped. The second spring 172 is sleeved on the pressing head 171, the second limiting post 173 is fixedly disposed on the pressing head 171, and the second limiting post 173 is inserted into the second spring 172 and perpendicular to the pressing head 171.

In this embodiment, a second fixing frame 20 is disposed in the lock body 1, the second fixing frame 20 is fixed in the lock box 11 by screws, and the second receiving slot and the third movable hole are disposed on the second fixing frame 20. In order to reduce the friction between the pressing head 171 and the doorframe or the shackle 2 so as to prevent scratching the doorframe or the shackle 2, a mounting groove is provided on the pressing head 171 at an end thereof remote from the second link 174, the mounting groove is located outside the lock case 11, and the roller 175 is rotatably mounted on the mounting groove. The first fixing frame 10, the second fixing frame 20 and the lock cylinder bracket 19 are all in a reversed U shape.

Preferably, as shown in fig. 1, 5 and 6, a locking assembly 22 is disposed in the cavity hole a of the lock catch 2, and when the lock head 12 is inserted into the cavity hole a, the locking assembly 22 is driven by its own restoring force to clamp the lock head 12. In this embodiment, the locking assembly 22 includes: a lock 222 and a torsion spring 223. The locking piece 222 is rotatably assembled in the cavity hole a of the lock catch 2 through the rotating shaft 221, and the locking piece 222 is provided with a locking hole matched with one end of the lock head 12 far away from the toggle piece 13. The torsion spring 223 is disposed on two sides of the locking piece 222 and sleeved on the rotation shaft 221, one end of the torsion spring 223 is limited on the latch 2 and located on one side of the rotation shaft 221, and the other end is fixed on the locking piece 222 and located on the other side of the rotation shaft 221. When the door is closed, the door leaf is only pushed to move outwards, the lock head 12 can strike the lock block 222 on the lock catch 2, so that the lock block 222 rotates, and meanwhile, the press head 171 can be extruded by the press head seat 21, so that the press head 171 retracts and drives the spring pin 162 to be in a pre-locking state. After the door is closed to the proper position, the locking piece 222 on the lock catch 2 clamps the lock head 12 under the action of the torsion spring 223.

Preferably, a position-limiting rod 224 is disposed in the cavity-receiving hole a of the lock catch 2 and on one side of the rotation shaft 221, a positioning hole e is disposed between the position-limiting rod 224 and the lock catch 2, and one end of the torsion spring 223, which is far away from the locking piece 222, is limited in the positioning hole e. In this embodiment, the locking piece 222 is hook-shaped. The locking hole is rectangular, and one side of the lock head 12 far away from one end of the lock box 11 is trapezoidal, and the other side is semicircular.

The working principle of the utility model is as follows: when the door is in a closed state, and the lock body 1 is in a locked state, the lock 12 is clamped by the lock block 222 on the lock catch 2, the pressure head 171 on the lock is compressed by the pressure head seat 21 on the lock catch 2, so that the spring pin 162 is driven to move, the spring pin 162 is in a pre-locking state, when the knob 15 is rotated or the lock is unlocked by a key, the lock cylinder drives the toggle block 13 to rotate, the toggle block 13 drives the lock 12 to retract into the lock box 11, so that the convex clamping portion 131 on the toggle block 13 is clamped by the spring pin 162, the knob 15 can be loosened or the key can be pulled out at the moment, and then the door is opened by the operation of two hands. When the door is opened, the pressure head 171 automatically resets under the action of the spring, the spring pin 162 is driven by the pressure head 171 to be separated from the convex clamping part 131, and the lock head 12 automatically resets under the action of the spring force. When the door is closed, the door leaf is only required to be pushed to move towards the outside of the air film building, the lock head 12 can impact the lock hook on the lock catch 2 to enable the lock hook to rotate, meanwhile, the pressure head 171 can be extruded by the pressure head seat 21, and the pressure head 171 retracts and drives the spring pin 162 to be in a pre-locking state. After the door is closed in place, the locking hook on the lock catch 2 clamps the lock head 12 under the action of the torsion spring 223.

The above description is only for the purpose of illustration and not limitation, and other modifications or equivalent replacements made by those skilled in the art to the technical solution of the present invention should be covered by the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a tool to lock for air film building access door, includes lock body (1) and hasp (2), be provided with the key hole on lock body (1) one side, be provided with on hasp (2) and hold locular hole (a), its characterized in that, be close to on hasp (2) hold locular hole (a) one side and be provided with pressure head seat (21), lock body (1) includes: a lock case (11);

a lock head (12) which is arranged in the lock box (11) and can be inserted into the cavity containing hole (a);

a dial block (13) rotatably assembled in the lock case (11);

a linkage component (14) with one end connected with the lock head (12) and the other end connected with the toggle block (13) in a linkage way;

the knob (15) is arranged on one side, far away from the key hole, of the lock box (11) and is connected with the poking block (13);

a stopping component (16) which is arranged in the lock box (11) and is used for stopping the shifting block (13) when the lock head (12) is contracted in the lock box (11); and the number of the first and second groups,

the pressing head component (17) is arranged on the lock box (11), one end of the pressing head component can be connected with the pressing head seat (21) in an inserting mode, the other end of the pressing head component is connected with the stopping component (16) in a linkage mode, the stopping component (16) stops the shifting block (13), the pressing head seat (21) is separated from the pressing head component (17), the pressing head component (17) drives the stopping component (16) to release the stopping action of the shifting block (13) under the driving of self restoring force, and the linkage component (14) drives the shifting block (13) to open, reset and drive the lock head (12) to stretch out to the side far away from the lock box (11) under the driving of the self restoring force.

2. The lockset for the air film building access door according to claim 1, wherein a first accommodating groove (b) is formed in the lock box (11), first movable holes for the lock head (12) to penetrate through are formed in the lock box (11) and located at two sides of the first accommodating groove (b), a limiting groove for limiting the rotation angle of the toggle block (13) is formed in one side, close to the linkage component (14), of the lock box (11), and the linkage component (14) comprises:

the first spring (141) is arranged in the first accommodating groove (b) and sleeved on the lock head (12);

the first limiting column (142) is arranged on the lock head (12) and is inserted and connected to the first spring (141); and the number of the first and second groups,

one end of the first connecting rod (143) is hinged on one end of the lock head (12), and the other end of the first connecting rod is hinged on one end of the toggle block (13).

3. The lock for an air film building access door according to claim 2, wherein a second movable hole (c) is formed in the lock box (11) on a side close to the toggle block (13), a protruding clamping portion (131) is formed in one end of the toggle block (13) far away from the first connecting rod (143), and the stop assembly (16) comprises: a movable frame (161) rotatably fitted in the second movable hole (c); and the number of the first and second groups,

wear to locate on the adjustable shelf (161), can be used to under the drive of self restoring force with protruding joint portion (131) joint is in order to right spring pin (162) of stirring piece (13) locking.

4. The lock for air film building access door according to claim 3, wherein a second receiving groove corresponding to the first receiving groove (b) is provided in the lock box (11), third movable holes are provided on both sides of the second receiving groove on the lock box (11), and the pressure head assembly (17) comprises: a pressure head (171) which is arranged in the third movable hole in a penetrating way, is parallel to the lock head (12) and has one end capable of being inserted into the pressure head seat (21);

a second spring (172) which is arranged in the second accommodating groove and sleeved on the pressure head (171); a second limiting column (173) fixedly arranged on the pressure head (171) and inserted with the second spring (172); and the number of the first and second groups,

and one end of the second connecting rod (174) is hinged with one end of the pressure head (171) far away from the pressure head seat (21), and the other end of the second connecting rod is hinged with the movable frame (161).

5. The lock for air film building access door according to claim 4, characterized in that the end of the ram (171) remote from the second link (174) is provided with a mounting groove outside the lock case (11), which is fitted with a roller (175) in rotation.

6. The lockset for air film building access door according to claim 1, wherein a locking component (22) is arranged in the cavity hole (a) of the lock catch (2), and when the lock head (12) is inserted into the cavity hole (a), the locking component (22) is tightly clamped with the lock head (12) under the driving of self-restoring force.

7. The lock for air film building access doors according to claim 6, characterized in that said locking assembly (22) comprises: the locking block (222) is rotatably assembled in a cavity containing hole (a) in the lock catch (2) through a rotating shaft (221), and a locking hole matched with one end, far away from the shifting block (13), of the lock head (12) is formed in the locking block (222); and the number of the first and second groups,

set up in locking piece (222) both sides and cover locate on axis of rotation (221), one end spacing in on hasp (2) and be located axis of rotation (221) one side, the other end is fixed in on locking piece (222) and be located torsional spring (223) of axis of rotation (221) opposite side.

8. The lock for the air film building access door according to claim 7, wherein a limiting rod (224) is arranged in the cavity containing hole (a) of the lock catch (2) and located on one side of the rotating shaft (221), a positioning hole (e) is arranged between the limiting rod (224) and the lock catch (2), and one end, far away from the lock block (222), of the torsion spring (223) is limited in the positioning hole (e).

9. The lock for air film building access door according to claim 8, characterized in that the locking hole is rectangular, and one side of the lock head (12) far away from the lock box (11) is triangular and the other side is semicircular.

10. The lock for air film building access door according to claim 7, characterized in that the lock piece (222) is hook-shaped.

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