Roller shutter door ground hook lock structure

Abstract

The utility model discloses a roller shutter door ground hook lock structure which comprises an electromagnet, a second push-pull rod, a switch lock structure and an embedded box, wherein the electromagnet is arranged in a lock shell and is fixed relative to the lock shell; the second push-pull rod transversely penetrates through the electromagnet and can contract along with electrification of the electromagnet; the switch lock structure is connected with the second push-pull rod; the switch lock structure comprises one end of a brake part movably connected with the second push-pull rod, and the other end of the brake part is hinged to the lock plate. The lock plate is hinged to a spring bolt used for clamping the embedded box, and the brake piece is located between the spring bolt and the electromagnet. The section, penetrating out of the electromagnet and close to the lock plate, of the second push-pull rod is sleeved with a reset spring. The spring bolt comprises an arc-shaped matching section close to one side of the brake part, and the brake part is provided with a convex part close to the arc-shaped matching section and capable of being in sliding fit with the arc-shaped matching section. The push-pull rod penetrates through the electromagnet, the electromagnet is powered on to enable the second push-pull rod to contract, and therefore the spring bolt is separated from the second limiting rod, and the automatic unlocking and automatic locking functions of the ground hook lock are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of ground hook lock, concretely relates to a rolling slats door ground hook lock structure. BACKGROUND

[0002] Electric rolling slats door is widely used in shop, bank, warehouse, garage door and the like scene, the existing rolling slats door ground hook lock can only be unlocked through mechanical key, cannot realize remote opening, for example, when being installed in garage or warehouse, needs to get off the vehicle to use key to unlock when opening rolling slats door, can use remote control to lift rolling slats door, then returns to the vehicle again, starts the vehicle and enters the room, the Chinese utility model patent with the document number CN210460239U and the Chinese utility model patent with the document number CN211058508U are just the similar setting, the ground hook lock of this kind causes great inconvenience in daily use, the user is often unwilling to install lock on electric rolling slats door for the convenience of use, and the security risk of electric rolling slats door is thus increased, therefore, it is necessary to design a kind of electric rolling slats door ground hook lock that can automatically lock and automatically unlock. CONTENT OF THE UTILITY MODEL

[0003] The utility model aims at overcoming the deficiencies in the prior art, providing a rolling slats door ground hook lock structure, by setting up push-pull rod through electromagnet, electromagnet energization makes second push-pull rod contract, so that lock tongue and second limit rod are separated, the automatic unlocking and automatic locking function of ground hook lock are realized.

[0004] To achieve the above object, the utility model adopts the following technical scheme: a kind of rolling slats door ground hook lock structure, including electromagnet being arranged in lock shell interior and being fixed relative to it, second push-pull rod being transversely through electromagnet and being able to contract with its energization, switch lock structure being connected with second push-pull rod, and pre-buried box being set corresponding to lock shell;Lock plate is fixedly connected with lock plate fixed pin in the end of lock shell, and the bottom of lock plate corresponding lock plate is provided with opening, and lock plate is set through opening;Switch lock structure includes brake piece one end being movably connected with second push-pull rod, and brake piece other end is hinged with lock plate;Lock plate is hinged with lock tongue for clamping pre-buried box, and brake piece is between lock tongue and electromagnet;Second push-pull rod is set with reset spring outside one side of electromagnet and close to lock plate, and reset spring one end is fixedly connected with electromagnet, and other end is fixedly connected with second push-pull rod end;Lock tongue includes arc matching section being set close to brake piece side, and brake piece close to arc matching section is set with convex part being able to slide with it;The upper portion of lock tongue is provided with first fixed rod, and the inside of lock shell is provided with second fixed rod between lock plate and electromagnet, and first spring is arranged between first fixed rod and second fixed rod.

[0005] Further, the lock shell is in the shape of a hollow rectangular parallelepiped, and the two ends of the lock shell are symmetrically provided with switch lock structures that are the same in structure and size and are driven by electromagnets.

[0006] Further, the bottom of the lock plate is provided with an upwardly recessed clamping portion, the bottom of the lock tongue is provided with an upwardly inclined recessed locking portion, the clamping portion and the locking portion are correspondingly arranged; the second limiting rod is arranged in the embedded box, and the locking portion is locked into the clamping portion by the abutting and separation of the convex portion and the arc-shaped matching segment.

[0007] Further, the support frame is fixedly installed in the lock shell, and the electromagnet is fixedly installed on the support frame; the second push-pull rod is fixedly connected with the baffle at one end close to the lock plate, and the one end of the return spring is fixedly connected with the baffle.

[0008] Further, the second push-pull rod is connected with one end of the third push-pull rod at an end close to the brake member, and the other end of the third push-pull rod is hingedly connected with the upper portion of the brake member.

[0009] Further, the limit block is arranged above the lock tongue in the lock shell, the middle portion of the limit block is provided with a block positioning hole, the block positioning pin is fixedly arranged in the lock shell and rotatably connected with the limit block through the block positioning hole, the top of one side of the brake member close to the limit block is provided with a notch capable of abutting against one end of the limit block, the other end of the limit block is provided with a spring hanging hole, the third fixed rod is fixedly connected in the lock shell, and the second spring is arranged between the third fixed rod and the spring hanging hole.

[0010] Further, the limit block is located between the third fixed rod and the brake member, and the second spring is in a stretched state.

[0011] Further, the top of the lock tongue is provided with a limiting groove downwardly, and the other end of the limit block away from the brake member is located in the limiting groove; the top of the lock plate is provided with a second limiting groove downwardly, and the limit block is provided with a limiting pin capable of abutting against the second limiting groove; when the second push-pull rod is retracted to drive the top of the brake member to incline towards the electromagnet, the one end of the limit block close to the brake member abuts against the notch, and the other end of the limit block abuts against the other end of the limiting groove away from the brake member.

[0012] Further, the lock shell is provided with a lock pick structure in the middle portion, the lock pick structure comprises a fixed plate fixedly connected with the inside of the lock shell, the lock pick is rotatably connected with the fixed plate by penetrating into the fixed plate from the outside of the lock shell, the outside of the lock pick located in the inside of the lock shell is sleeved with a gear ring, the top and bottom of the gear ring are respectively meshed with a first gear rack and a second gear rack, the first gear rack and the second gear rack are respectively connected with a corresponding first push-pull rod, the first push-pull rod is connected with a second push-pull rod, a strip-shaped hole is formed in the first push-pull rod, a first limiting rod is arranged in the strip-shaped hole, and the first limiting rod is fixedly connected with the lock shell.

[0013] Further, the embedded box is provided with a fixed shaft at the top, the cover plate is rotatably connected with the fixed shaft, the embedded box is symmetrically provided with limiting holes, and the two ends of the second limiting rod are respectively arranged in the limiting holes.

[0014] The utility model discloses an advantageous effect is: through setting up push -and -pull rod and passing through electromagnet, and electromagnet energization makes second push -and -pull rod contract, thereby releases the lock tongue, makes the lock tongue and second limit rod separate, realizes the automatic unlocking and automatic locking function of ground hook lock, and the cooperation of using with electric rolling slats door improves the security performance and convenience of rolling slats door, through setting up limit and pushing block, when second push -and -pull rod contracts under the electromagnet, limit and pushing block and the notch of brake part are opposite, prevent electromagnet and do not have electricity or power shortage and rebound, then lock tongue and pre -buried box separate after the first spring tension and lock tongue counterclockwise rotation, and the limit groove of lock tongue makes limit and pushing block rotate again, and its other end separates with the notch, thereby under the action of reset spring second push -and -pull rod rebounds, and brake part top rotates away from electromagnet direction. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is whole structure schematic diagram of the utility model;

[0016] Figure 2 It is whole structure schematic diagram of the utility model of taking off lock plate;

[0017] Figure 3 It is internal structure schematic diagram of the utility model;

[0018] Figure 4 It is the structure schematic diagram of the utility model of Figure 3 Amplification structure schematic diagram of the utility model in A place;

[0019] Figure 5 It is lock key structure schematic diagram of the utility model;

[0020] Figure 6 It is switch lock structure schematic diagram of the utility model.

[0021] In the drawing: 1, lock shell;2, lock key;201, fixed plate;3, gear ring;4, first rack;401, second rack;402, first push -and -pull rod;403, strip hole;404, first limit rod;405, second push -and -pull rod;406, electromagnet;407, support frame;5, baffle;6, reset spring;7, third push -and -pull rod;8, first connecting hole;9, lock plate;10, brake part;11, lock tongue;1101, lock plate fixed pin;12, push -and -pull rod connecting hole;13, brake part positioning hole;1301, brake part positioning pin;14, lock tongue positioning hole;1401, lock tongue positioning pin;15, first fixed rod;16, first spring;17, third fixed rod;18, limit and pushing block;19, second spring;20, pushing block positioning hole;2001, pushing block positioning pin;21, spring hanging hole;22, limit pin;23, second fixed rod;24, pre -buried box;25, fixed shaft;26, cover plate;27, limit hole;28, second limit rod. DETAILED DESCRIPTION

[0022] The utility model will be further explained in connection with the drawings and specific embodiments.

[0023] Embodiment:

[0024] As Figures 1-6 shown, a roll shutter door ground hook lock structure, including set in the lock shell 1 inside and opposite its fixed electromagnet 406, transversely through electromagnet 406 and can along with its power contraction to the direction of far away from lock plate 9 second push-pull rod 405, with the switch lock structure of second push-pull rod 405 connection, and the pre-buried box 24 of corresponding lock shell 1 setting;Setting lock plate 9 package protection lock tongue 11 and brake 10, avoid to be destroyed by external force;Lock shell 1 end portion is fixedly connected with lock plate 9 through lock plate fixed pin 1101, lock shell 1 bottom is equipped with the opening corresponding lock plate 9, lock plate 9 sets up, lock plate 9 relative electromagnet 406 is closer to the end of lock shell 1;Switch lock structure includes brake 10 one end with second push-pull rod 405 one end near lock plate 9 swing joint, brake 10 other end and lock plate 9 articulate;Lock plate 9 and the lock tongue 11 for clamping pre-buried box 24 articulate, brake 10 is located between lock tongue 11 and electromagnet 406;Brake 10 and lock plate 9 are all opened brake positioning hole 13, brake positioning pin 1301 is simultaneously through two brake positioning holes 13, lock tongue 11 and lock plate 9 are all opened lock tongue positioning hole 14, lock tongue positioning pin 1401 is simultaneously through two lock tongue positioning holes 14;Second push-pull rod 405 sets up reset spring 6 outside the one segment of electromagnet 406 and near lock plate 9, reset spring 6 one end and electromagnet 406 fixed connection, other end and second push-pull rod 405 end fixed connection;Lock tongue 11 includes the arc-shaped matching section of near brake 10 side setting, arc-shaped matching section recesses to the direction of far away from brake 10, brake 10 near arc-shaped matching section setting can with its sliding fit convex part;Lock tongue 11 upper portion is provided with first fixed rod 15, lock shell 1 inside is provided with second fixed rod 23 between lock plate 9 and electromagnet 406, first fixed rod 15 and second fixed rod 23 are provided with first spring 16 between;When convex part and arc-shaped matching section abut, first spring 16 is in the tensile state, when brake 10 top is inclined to electromagnet 406, namely, when convex part leaves arc-shaped matching section, first spring 16 is in the relaxed state;Lock tongue 11 rotates, and the ground hook lock is opened.

[0025] Lock shell 1 is hollow cuboid as a whole, and the switch lock structure of the same structure and size is symmetrically arranged at both ends of the lock shell 1 and driven by the electromagnet 406.

[0026] The bottom of the lock plate 9 is provided with an upwardly recessed clamping portion, the bottom of the lock tongue 11 is provided with an upwardly inclined and recessed locking portion, and the clamping portion and the locking portion are correspondingly arranged; the second limiting rod 28 is arranged in the embedded box 24, and the locking portion is locked into the clamping portion by the abutting and separating of the convex portion and the arc-shaped matching segment.

[0027] The support frame 407 is fixedly installed in the lock shell 1, the electromagnet 406 is fixedly installed on the support frame 407, a power supply is arranged outside the lock shell 1, the power supply is electrically connected with the electromagnet 406, and a wireless receiving module is arranged, which is used for receiving a signal of a controller to turn on and turn off the electromagnet 406; the electromagnet 406 and the second push-pull rod 405 form a push-pull electromagnet, the second push-pull rod 405 moves horizontally away from the lock plate 9 when the electromagnet 406 is powered on, and the return spring 6 is compressed at the same time; the end of the second push-pull rod 405 close to the lock plate 9 is fixedly connected with the baffle 5, one end of the return spring 6 is fixedly connected with the baffle 5, and the other end of the return spring 6 is connected with the electromagnet 406.

[0028] The end of the second push-pull rod 405 close to the brake member 10 is connected with one end of the third push-pull rod 7 through a hinge, and the other end of the third push-pull rod 7 is hingedly connected with the upper portion of the brake member 10; the first connecting hole 8 is arranged on the third push-pull rod 7, the second connecting hole 12 is correspondingly arranged on the top of the brake member 10, and the connecting pin passes through the first connecting hole 8 and the second connecting hole 12 to connect the two.

[0029] The limiting block 18 is arranged above the lock tongue 11 in the lock shell 1, the limiting block 18 is in a crescent shape, the block positioning hole 20 is formed in the middle of the limiting block 18, the block positioning pin 2001 passes through the block positioning hole 20 and is fixed with the lock shell 1, and the block positioning pin 2001 is rotationally connected with the limiting block 18 through the block positioning hole 20; the top of the side close to the limiting block 18 of the brake member 10 is provided with a notch capable of abutting one end of the limiting block 18, the other end of the limiting block 18 is provided with a spring hanging hole 21, the third fixed rod 17 is fixedly connected in the lock shell 1, and the second spring 19 is arranged between the third fixed rod 17 and the spring hanging hole 21.

[0030] The limiting block 18 is located between the third fixed rod 17 and the brake member 10, the second spring 19 is in a stretched state during the locking of the ground hook lock, and the second spring 19 is in a relaxed state after the lock tongue 11 rotates and is separated from the second limiting rod 28.

[0031] The top of the lock tongue 11 is provided with a limiting groove, and the end of the limiting block 18 away from the brake 10 is located in the limiting groove; the top of the lock plate 9 is provided with a second limiting groove, and the limiting block 18 is provided with a limiting pin 22 capable of abutting against the second limiting groove, and the limiting pin 22 is arranged to limit the movement range of the limiting block 18 and prevent excessive rotation; when the second push-pull rod 405 is retracted to tilt the top of the brake 10 towards the electromagnet 406, the end of the limiting block 18 close to the brake 10 abuts against the gap, and the other end of the limiting block 18 abuts against the end of the limiting groove away from the brake 10; then the second limiting rod 28 is disengaged from the locking part, and then the lock tongue 11 is rotated and opened under the stretching action of the first spring 16, the top of the lock tongue 11 drives the tail of the limiting block 18, and the top of the limiting block 18 is disengaged from the limiting groove.

[0032] The middle part of the lock shell 1 is provided with a lock key structure, the lock key structure comprises a fixed plate 201 fixedly connected with the inside of the lock shell 1, the lock key 2 penetrates into the fixed plate 201 from the outside of the lock shell 1 and is rotationally connected with the fixed plate 201, the lock key 2 is sleeved with a gear ring 3 outside the part located in the inside of the lock shell 1, the top and bottom of the gear ring 3 are respectively meshed with a first gear rack 4 and a second gear rack 401, the first gear rack 4 and the second gear rack 401 are respectively connected with a first push-pull rod 402, the first push-pull rod 402 is connected with a second push-pull rod 405, the first push-pull rod 402 is provided with a strip-shaped hole 403, the first limiting rod 404 is arranged in the strip-shaped hole 403, and the first limiting rod 404 is fixedly connected with the lock shell 1, so that the first push-pull rod 402 can move horizontally.

[0033] The top of the embedded box 24 is provided with a fixed shaft 25, the cover plate 26 is rotationally connected with the fixed shaft 25, the embedded box 24 is symmetrically provided with limiting holes 27, and the two ends of the second limiting rod 28 are respectively arranged in the limiting holes 27, and the diameters of the limiting holes 27 are greater than the diameter of the second limiting rod 28.

[0034] Working process: the embedded box 24 is embedded in the ground, the lock shell 1 and the lock opening and closing structure are installed on the roller shutter door, when the roller shutter door is closed, the reset spring 6 is relaxed, the second push-pull rod 405 and the third push-pull rod 7 are in a relaxed state, the lock tongue 11 moves downward until the second limiting rod 28 enters the locking part, at this time, the second limiting rod 28 drives the lock tongue 11 to rotate along the arrow, the first spring 16 is stretched, the third push-pull rod 7 moves towards the lock tongue 11, drives the brake 10 to rotate clockwise until the convex part abuts against the arc matching segment, so that the lock tongue 11 cannot rotate counterclockwise, at this time, the lock tongue 11 is locked by the convex part and cannot be opened.

[0035] When it is necessary to open the rolling shutter door, taking the example of setting a right-end electromagnet 406 and a switch lock structure in the lock housing 1, the power supply configured in the remote control lock housing 1 is used to energize the electromagnet 406. After the electromagnet 406 is energized, the second push rod 405 moves towards the middle of the lock housing 1. At the same time, the return spring 6 contracts. The second push rod 405 drives the third push rod 7 to move towards the middle of the lock housing 1. The third push rod 7 drives the brake member 10 to rotate counterclockwise. At this time, the convex portion is separated from the arc matching section, and the limit dial block 18 rotates under the pulling force of the second spring 19. One end of it abuts against the notch of the brake member 10, and the other end abuts against the side of the limit groove of the lock tongue 11 away from the brake member 10. At this time, the electromagnet 406 is powered off, but the limit dial block 18 prevents the return spring 6 from rebounding; at this time, the locking of the brake member 10 on the lock tongue 11 is released; due to the existence of the arc matching section, the convex portion can be separated from the lock tongue 11 when rotating counterclockwise without movement interference; after the locking is released, the rolling shutter door rises, and the second limit rod 28 exits from the locking portion. The lock tongue 11 moves counterclockwise under the pulling force of the first spring 16. When the lock tongue 11 moves counterclockwise, one side of the limit groove pushes one end of the limit dial block 18, causing it to rotate clockwise. Then, the other end of the limit dial block 18 is separated from the notch. Under the pushing force of the return spring 6, the third push rod 7 moves to the right, and the brake member 10 rotates clockwise. However, its convex portion is not within the arc matching section. Only when the lock tongue 11 rotates clockwise can the convex portion enter and contact the arc matching section. Under the pushing force of the return spring 6, the convex portion tightly abuts against the arc matching section to prevent the lock tongue from rotating counterclockwise and keep the lock tongue locked.

[0036] When the power supply in the lock housing 1 has no power or malfunctions, turn the key 2. The rotation of the key 2 drives the gear ring 3. The rotation of the gear ring 3 drives the first rack 4 and the second rack 401. The first rack 4 and the second rack 401 drive the corresponding first limit rods 404. The first push rod 402 drives the second push rod 405. The second push rod 405 drives the third push rod 7. The third push rod 7 controls the switch lock structure.

[0037] The descriptions of the top, bottom, left, right and other orientations and clockwise, counterclockwise and other descriptions in this solution are all for Figures 1-6 the state shown.

[0038] As described above, it is only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solution of the present invention, as long as they do not depart from the spirit and scope of the technical solution of the present invention, should all be covered within the scope of the claims of the present invention.

Claims

1. A roller shutter door floor hook lock structure, characterized in that: The lock includes an electromagnet (406) fixed inside the lock housing (1), a second push-pull rod (405) that extends laterally through the electromagnet (406) and retracts when energized, a switch lock structure connected to the second push-pull rod (405), and a pre-embedded box (24) corresponding to the lock housing (1); a lock plate (9) is fixedly connected to the end of the lock housing (1) by a lock plate fixing pin (1101), and the bottom of the lock housing (1) corresponding to the lock plate (9) has an opening, through which the lock plate (9) protrudes; the switch lock structure includes a brake element (10) whose one end is movably connected to the second push-pull rod (405), and the other end of the brake element (10) is hinged to the lock plate (9); the lock plate (9) is hinged to the lock tongue (11) used to lock the pre-embedded box (24), and the brake element (10) is located at the lock Between the tongue (11) and the electromagnet (406); a return spring (6) is sleeved on the outer side of the second push-pull rod (405) that passes through the electromagnet (406) and is close to the lock plate (9). One end of the return spring (6) is fixedly connected to the electromagnet (406), and the other end is fixedly connected to the end of the second push-pull rod (405). The lock tongue (11) includes an arc-shaped matching section provided on the side close to the brake (10). The brake (10) is provided with a protrusion that can slide with the arc-shaped matching section. A first fixing rod (15) is provided on the upper part of the lock tongue (11). A second fixing rod (23) is provided in a place inside the lock shell (1) between the lock plate (9) and the electromagnet (406). A first spring (16) is provided between the first fixing rod (15) and the second fixing rod (23).

2. The roller shutter door floor hook lock structure according to claim 1, characterized in that: The lock housing (1) is a hollow cuboid in shape. The two ends of the lock housing (1) are symmetrically provided with a switch lock structure with the same structure and size and driven by an electromagnet (406).

3. A roller shutter door floor hook lock structure according to claim 1 or 2, characterized in that: The bottom of the locking plate (9) is provided with an upwardly recessed locking part, and the bottom of the locking tongue (11) is provided with an upwardly inclined and recessed locking part. The locking part and the locking part are provided in correspondence. The second limiting rod (28) is provided in the pre-embedded box (24). The braking component (10) locks the second limiting rod (28) into the locking part by the contact and separation of the protrusion and the arc matching section.

4. A roller shutter door floor hook lock structure according to claim 1 or 2, characterized in that: A support frame (407) is fixedly installed inside the lock housing (1), and an electromagnet (406) is fixedly installed on the support frame (407); a baffle (5) is fixedly connected to one end of the second push-pull rod (405) near the lock plate (9), and one end of the reset spring (6) is fixedly connected to the baffle (5).

5. A roller shutter door floor hook lock structure according to claim 1 or 2, characterized in that: The second push-pull rod (405) is hinged to one end of the third push-pull rod (7) near the brake (10), and the other end of the third push-pull rod (7) is hinged to the upper part of the brake (10).

6. A roller shutter door floor hook lock structure according to claim 1 or 2, characterized in that: A limit block (18) is provided inside the lock housing (1) above the lock tongue (11). A block positioning hole (20) is opened in the middle of the limit block (18). A block positioning pin (2001) passes through the block positioning hole (20) and is fixed to the lock housing (1). The block positioning pin (2001) is rotatably connected to the limit block (18) through the block positioning hole (20). A notch is provided on the top of the side of the brake (10) near the limit block (18) so that it can abut against one end of the limit block (18). A spring hanging hole (21) is provided on the other end of the limit block (18). A third fixing rod (17) is fixedly connected inside the lock housing (1). A second spring (19) is provided between the third fixing rod (17) and the spring hanging hole (21).

7. The roller shutter door floor hook lock structure according to claim 6, characterized in that: The limit block (18) is located between the third fixed rod (17) and the brake (10), and the second spring (19) is in a stretched state.

8. The roller shutter door floor hook lock structure according to claim 7, characterized in that: A limiting groove is opened downward at the top of the locking tongue (11), and the end of the limiting block (18) away from the brake (10) is located in the limiting groove; a second limiting groove is opened downward at the top of the locking plate (9), and a limiting pin (22) that can abut against the second limiting groove is provided on the limiting block (18); when the second push-pull rod (405) retracts and drives the top of the brake (10) to tilt towards the electromagnet (406), the end of the limiting block (18) close to the brake (10) abuts against the notch, and the other end of the limiting block (18) abuts against the end of the limiting groove away from the brake (10).

9. The roller shutter door floor hook lock structure according to claim 2, characterized in that: A key structure is provided in the middle of the lock shell (1). The key structure includes a fixed plate (201) that is fixedly connected to the inside of the lock shell (1). The key (2) passes through the fixed plate (201) from the outside of the lock shell (1) and is rotatably connected to it. A toothed ring (3) is sleeved on the outer side of a section of the key (2) inside the lock shell (1). The top and bottom of the toothed ring (3) are respectively engaged with the first rack (4) and the second rack (401). The first rack (4) and the second rack (401) are respectively connected to the corresponding first push-pull rod (402). The first push-pull rod (402) is connected to the second push-pull rod (405). A strip hole (403) is provided on the first push-pull rod (402). A first limiting rod (404) is provided in the strip hole (403). The first limiting rod (404) is fixedly connected to the lock shell (1).

10. A roller shutter door floor hook lock structure according to claim 2, characterized in that: The top of the pre-embedded box (24) is provided with a fixed shaft (25), and the cover plate (26) is rotatably connected to the fixed shaft (25). The pre-embedded box (24) is symmetrically provided with limiting holes (27), and the two ends of the second limiting rod (28) are respectively placed in the limiting holes (27).

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