Roller shutter door ground hook lock structure

Abstract

The roller shutter door ground hook lock structure 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 present invention relates to the technical field of floor hook locks, and particularly relates to a floor hook lock structure for a rolling shutter door. Background Art

[0002] Electric rolling shutter doors are widely used in scenarios such as shops, banks, warehouses, and garage doors. Existing floor hook locks for rolling shutter doors can only be unlocked with a mechanical key and cannot be remotely opened. For example, when installed in a garage or warehouse, when opening the rolling shutter door, one needs to get out of the car first to use the key to unlock it, then use the remote control to raise the rolling shutter door, and then return to the car again and start the vehicle to enter the room. Chinese invention patents with document numbers CN210460239U and CN211058508U adopt similar settings. This type of floor hook lock causes great inconvenience in daily use. To facilitate use, users often do not want to install locks on electric rolling shutter doors, thus increasing the safety hazards of electric rolling shutter doors. Therefore, it is necessary to design an electric rolling shutter door floor hook lock that can automatically lock and unlock. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a floor hook lock structure for a rolling shutter door. By setting a push-pull rod to penetrate through an electromagnet, when the electromagnet is energized, the second push-pull rod contracts, so that the lock tongue is disengaged from the second limiting rod, realizing the automatic unlocking and automatic locking functions of the floor hook lock.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions: A floor hook lock structure for a rolling shutter door includes an electromagnet disposed inside a lock housing and fixed relative thereto, a second push-pull rod that horizontally penetrates the electromagnet and can contract with its energization, a switch lock structure connected to the second push-pull rod, and a buried box corresponding to the lock housing. A lock plate is fixedly connected to the inner end of the lock housing through a lock plate fixing pin, and an opening is provided at the bottom of the lock housing corresponding to the lock plate, and the lock plate passes through the opening. The switch lock structure includes one end of a brake member that is movably connected to the second push-pull rod, and the other end of the brake member is hinged to the lock plate. The lock plate is hinged to a lock tongue for clamping the buried box, and the brake member is located between the lock tongue and the electromagnet. A return spring is sleeved on the outer side of a section of the second push-pull rod that penetrates the electromagnet and is close to the lock plate. One end of the return spring is fixedly connected to the electromagnet, and the other end is fixedly connected to the end of the second push-pull rod. The lock tongue includes an arc-shaped matching section provided on the side close to the brake member, and a convex portion is provided on the brake member close to the arc-shaped matching section to be able to slidably cooperate with it. A first fixing rod is provided on the upper part of the lock tongue, and a second fixing rod is provided at a position between the lock plate and the electromagnet inside the lock housing. A first spring is provided between the first fixing rod and the second fixing rod.

[0005] Further, the lock housing is integrally in the shape of a hollow cuboid, and switch lock structures that are symmetrically arranged at both ends of the lock housing and driven by the electromagnet and have the same structure and size are provided.

[0006] Furthermore, a clamping portion that is recessed upward is provided at the bottom of the lock plate, and a locking portion that is inclined and recessed upward is provided at the bottom of the lock tongue. The clamping portion and the locking portion are correspondingly arranged. A second limiting rod is arranged in the embedded box, and the locking portion locks the second limiting rod into the clamping portion through the contact and separation between the convex portion and the arc matching section of the braking member.

[0007] Furthermore, a support frame is fixedly installed in the lock housing, and an electromagnet is fixedly installed on the support frame. One end of the second push rod near the lock plate is fixedly connected with a baffle, and one end of the return spring is fixedly connected with the baffle.

[0008] Furthermore, one end of the second push rod near the braking member is hinged to one end of a third push rod, and the other end of the third push rod is hinged to the upper part of the braking member.

[0009] Furthermore, a limiting block is arranged in the lock housing above the lock tongue. A block positioning hole is opened in the middle of the limiting block. The block positioning pin passes through the block positioning hole and is fixed to the lock housing. The block positioning pin is rotatably connected with the limiting block through the block positioning hole. A notch that can abut against one end of the limiting block is provided at the top of one side of the braking member close to the limiting block. A spring hanging hole is provided at the other end of the limiting block. A third fixing rod is fixedly connected in the lock housing, and a second spring is arranged between the third fixing rod and the spring hanging hole.

[0010] Furthermore, the limiting block is located between the third fixing rod and the braking member, and the second spring is in a stretched state.

[0011] Furthermore, a limiting groove is opened downward at the top of the lock tongue. One end of the limiting block away from the braking member is located in the limiting groove. A second limiting groove is opened downward at the top of the lock plate. A limiting pin that can abut against the second limiting groove is arranged on the limiting block. When the second push rod contracts and drives the top of the braking member to tilt towards the electromagnet, one end of the limiting block close to the braking member abuts against the notch, and the other end of the limiting block abuts against the end of the limiting groove away from the braking member.

[0012] Furthermore, a key structure is arranged in the middle of the lock housing. The key structure includes a fixing plate fixedly connected to the inside of the lock housing. The key penetrates through the fixing plate from the outside of the lock housing and is rotatably connected to it. A gear ring is sleeved on the outer side of a section of the key located inside the lock housing. The top and bottom of the gear ring are respectively meshed with a first rack and a second rack. The first rack and the second rack are respectively connected to corresponding first push rods. The first push rod is connected to the second push rod. A strip-shaped hole is opened on the first push rod, and a first limiting rod is arranged in the strip-shaped hole. The first limiting rod is fixed to the lock housing.

[0013] Furthermore, a fixed shaft is arranged at the top of the embedded box. The cover plate is rotatably connected to the fixed shaft. Limiting holes are symmetrically arranged in the embedded box, and both ends of the second limiting rod are respectively placed in the limiting holes.

[0014] The beneficial effects of the present invention are as follows: By arranging a push rod to penetrate through an electromagnet, when the electromagnet is energized, the second push rod contracts, thereby releasing the lock tongue, enabling the lock tongue to disengage from the second limiting rod, realizing the automatic unlocking and automatic locking functions of the floor hook lock. When used in conjunction with an electric rolling shutter door, it improves the safety performance and convenience of the rolling shutter door; By arranging a limiting block, when the second push rod contracts under the action of the electromagnet, the limiting block abuts against the notch of the braking member, preventing the electromagnet from losing power or having insufficient power and rebounding. Then, after the lock tongue disengages from the embedded box and rotates counterclockwise under the action of the first spring's tension, the limiting groove of the lock tongue causes the limiting block to rotate, making the other end of the limiting block disengage from the notch. Thus, under the action of the reset spring, the second push rod rebounds, and the top of the braking member rotates away from the electromagnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the overall structure of the present invention with the lock plate removed; Figure 3 is a schematic diagram of the internal structure of the present invention; Figure 4 is of the present invention Figure 3 schematic enlarged structure diagram at A in; Figure 5 is a schematic diagram of the key structure of the present invention; Figure 6 is a schematic diagram of the unlocking and locking structure of the present invention.

[0016] In the figure: 1, lock housing; 2, key; 201, fixing plate; 3, gear ring; 4, first rack; 401, second rack; 402, first push rod; 403, strip hole; 404, first limiting rod; 405, second push rod; 406, electromagnet; 407, support frame; 5, baffle; 6, reset spring; 7, third push rod; 8, first connection hole; 9, lock plate; 10, braking member; 11, lock tongue; 1101, lock plate fixing pin; 12, push rod connection hole; 13, braking member positioning hole; 1301, braking member positioning pin; 14, lock tongue positioning hole; 1401, lock tongue positioning pin; 15, first fixing rod; 16, first spring; 17, third fixing rod; 18, limiting block; 19, second spring; 20, block positioning hole; 2001, block positioning pin; 21, spring hanging hole; 22, limiting pin; 23, second fixing rod; 24, embedded box; 25, fixed shaft; 26, cover plate; 27, limiting hole; 28, second limiting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The present invention will be further explained and described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Embodiment: AsFigures 1-6 As shown in the figure, a ground hook lock structure for a rolling shutter door includes an electromagnet 406 disposed inside the lock housing 1 and fixed relative thereto, a second push rod 405 that laterally penetrates the electromagnet 406 and can contract away from the lock plate 9 when it is energized, a switch lock structure connected to the second push rod 405, and a buried box 24 disposed corresponding to the lock housing 1; the lock plate 9 wraps and protects the lock tongue 11 and the braking member 10 to avoid being damaged by external forces; the lock plate 9 is fixedly connected to the end of the lock housing 1 through a lock plate fixing pin 1101, the bottom of the lock housing 1 corresponding to the lock plate 9 is provided with an opening, the lock plate 9 passes through the opening, and the lock plate 9 is closer to the end of the lock housing 1 than the electromagnet 406; the switch lock structure includes one end of the braking member 10 that is movably connected to one end of the second push rod 405 close to the lock plate 9, and the other end of the braking member 10 is hinged to the lock plate 9; the lock plate 9 is hinged to the lock tongue 11 for clamping the buried box 24, and the braking member 10 is located between the lock tongue 11 and the electromagnet 406; the braking member 10 and the lock plate 9 are both correspondingly provided with braking member positioning holes 13, and a braking member positioning pin 1301 passes through the two braking member positioning holes 13 at the same time, the lock tongue 11 and the lock plate 9 are both correspondingly provided with lock tongue positioning holes 14, and a lock tongue positioning pin 1401 passes through the two lock tongue positioning holes 14 at the same time; a return spring 6 is sleeved on the outer side of a section of the second push rod 405 that penetrates 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 rod 405; the lock tongue 11 includes an arc-shaped matching section disposed on the side close to the braking member 10, the arc-shaped matching section is recessed away from the braking member 10, and the braking member 10 is provided with a convex portion that can be slidably matched with the arc-shaped matching section close to the arc-shaped matching section; a first fixing rod 15 is provided on the upper part of the lock tongue 11, and a second fixing rod 23 is provided at a position inside the lock housing 1 between the lock plate 9 and the electromagnet 406, and a first spring 16 is provided between the first fixing rod 15 and the second fixing rod 23; when the convex portion abuts against the arc-shaped matching section, the first spring 16 is in a stretched state, and when the top of the braking member 10 tilts towards the electromagnet 406, that is, when the convex portion leaves the arc-shaped matching section, the first spring 16 is in a relaxed state; the lock tongue 11 rotates and the ground hook lock is opened.

[0019] The lock housing 1 is integrally in the shape of a hollow cuboid, and the two ends of the lock housing 1 are symmetrically provided with switch lock structures having the same structure and size and driven by the electromagnet 406.

[0020] The bottom of the lock plate 9 is provided with a downwardly concave clamping portion, and the bottom of the lock tongue 11 is provided with an upwardly inclined concave locking portion, and the clamping portion and the locking portion are correspondingly arranged; a second limiting rod 28 is arranged in the buried box 24, and the braking member 10 locks the second limiting rod 28 into the clamping portion through the abutment and separation of the convex portion and the arc-shaped matching section.

[0021] A support frame 407 is fixedly installed in the lock shell 1, and an electromagnet 406 is fixedly installed on the support frame 407. A power supply is arranged outside the lock shell 1, and the power supply is electrically connected to the electromagnet 406. A wireless receiving module is also provided to receive a signal from a controller to switch the electromagnet 406 on and off. The electromagnet 406 and the second push-pull rod 405 form a push-pull electromagnet. After the electromagnet 406 is energized, the second push-pull rod 405 moves horizontally away from the lock plate 9, and compresses the reset spring 6 at the same time. The second push-pull rod 405 is fixedly connected to a baffle 5 at one end close to the lock plate 9, and one end of the reset spring 6 is fixedly connected to the baffle 5, and the other end is connected to the electromagnet 406.

[0022] One end of the second push-pull rod 405 close to the brake member 10 is hingedly connected to one end of the third push-pull rod 7, and the other end of the third push-pull rod 7 is hingedly connected to the upper part of the brake member 10; a first connecting hole 8 is provided on the third push-pull rod 7, and a second connecting hole 12 is correspondingly provided on the top of the brake member 10, and a connecting pin passes through the first connecting hole 8 and the second connecting hole 12 to connect the two.

[0023] A limit shift block 18 is arranged above the lock tongue 11 in the lock shell 1. The limit shift block 18 is crescent-shaped, and a shift block positioning hole 20 is arranged in the middle of the limit shift block 18. A shift block positioning pin 2001 passes through the shift block positioning hole 20 and is fixed to the lock shell 1. The shift block positioning pin 2001 is rotatably connected to the limit shift block 18 through the shift block positioning hole 20; a notch that can abut against one end of the limit shift block 18 is arranged on the top of one side of the brake member 10 close to the limit shift block 18, and a spring hanging hole 21 is arranged on the other end of the limit shift block 18. A third fixing rod 17 is fixedly connected in the lock shell 1, and a second spring 19 is arranged between the third fixing rod 17 and the spring hanging hole 21.

[0024] The limiting shift block 18 is located between the third fixing rod 17 and the brake member 10. When the hook lock is locked, the second spring 19 is in a stretched state. After the locking tongue 11 rotates and disengages from the second limiting rod 28, the second spring 19 is in a relaxed state.

[0025] A limit groove is provided downwardly at the top of the lock tongue 11, and the end of the limit shift block 18 away from the brake member 10 is located in the limit groove; a second limit groove is provided downwardly at the top of the lock plate 9, and a limit pin 22 is provided on the limit shift block 18 that can abut against the second limit groove. The limit pin 22 is provided to limit the activity amplitude of the limit shift block 18 to prevent excessive rotation; when the second push-pull rod 405 contracts and drives the top of the brake member 10 to tilt toward the electromagnet 406, the end of the limit shift block 18 close to the brake member 10 abuts against the notch, and the other end of the limit shift block 18 abuts against the end of the limit groove away from the brake member 10; then the second limit rod 28 disengages from the locking portion and the locking portion, and then after the lock tongue 11 rotates to open under the tensile action of the first spring 16, the limit groove at the top of the lock tongue 11 drives the tail of the limit shift block 18 to make the top of the limit shift block 18 disengage from the limit groove.

[0026] A key structure is provided in the middle of the lock housing 1. The key structure includes a fixing plate 201 fixedly connected to the inside of the lock housing 1. The key 2 penetrates into the fixing plate 201 from the outside of the lock housing 1 and is rotatably connected thereto. A gear ring 3 is sleeved on the outer side of a section of the key 2 located inside the lock housing 1. The top and bottom of the gear ring 3 are respectively engaged with a first rack 4 and a second rack 401. The first rack 4 and the second rack 401 are respectively connected to corresponding first push rods 402. The first push rod 402 is connected to the second push rod 405. A strip-shaped hole 403 is formed in the first push rod 402. A first limiting rod 404 is arranged in the strip-shaped hole 403. The first limiting rod 404 is fixedly connected to the lock housing 1 to ensure that the first push rod 402 can move horizontally.

[0027] A fixed shaft 25 is provided at the top of the embedded box 24. The cover plate 26 is rotatably connected to the fixed shaft 25. Limiting holes 27 are symmetrically arranged in the embedded box 24. The two ends of the second limiting rod 28 are respectively placed in the limiting holes 27. The diameter of the limiting hole 27 is larger than the diameter of the second limiting rod 28.

[0028] Working process: The embedded box 24 is buried in the ground. The lock housing 1 and the lock unlocking and locking structure are installed on the rolling shutter door. When the rolling shutter door is closed, the return spring 6 is relaxed, and both the second push rod 405 and the third push rod 7 are in a relaxed state. The lock tongue 11 moves downward until the second limiting rod 28 enters its locking part. At this time, the second limiting rod 28 pushes the lock tongue 11 to rotate clockwise, and the first spring 16 is stretched. The third push rod 7 moves towards the lock tongue 11, driving the braking member 10 to rotate clockwise until the convex part abuts against the arc matching section, 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.

[0029] When it is necessary to open the rolling shutter door, taking the right-end electromagnet 406 and the switch lock structure arranged in the lock housing 1 as an example, 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 move 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 moves 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 into contact with the arc matching section and, 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.

[0030] When the power supply in the lock housing 1 is out of power or fails, 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.

[0031] The descriptions of the top, bottom, left, right and other directions as well as clockwise and counterclockwise in this solution are all for Figures 1-6 the state shown.

[0032] 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, shall be covered by the scope of the claims of the present invention.

Claims

1. A ground hook lock structure for a rolling shutter door, characterized in that: It includes an electromagnet (406) disposed inside and fixed relative to a lock housing (1), a second push rod (405) that laterally penetrates the electromagnet (406) and can contract upon its energization, a switch lock structure connected to the second push rod (405), and a buried box (24) disposed corresponding to the lock housing (1); a lock plate (9) is fixedly connected inside the end of the lock housing (1) through a lock plate fixing pin (1101), an opening is provided at the bottom of the lock housing (1) corresponding to the lock plate (9), and the lock plate (9) passes through the opening; the switch lock structure includes one end of a braking member (10) movably connected to the second push rod (405), and the other end of the braking member (10) is hinged to the lock plate (9); the lock plate (9) is hinged to a lock tongue (11) for clamping the buried box (24), and the braking member (10) is located between the lock tongue (11) and the electromagnet (406); a return spring (6) is sleeved outside a section of the second push rod (405) that penetrates 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 rod (405); the lock tongue (11) includes an arc-shaped matching section provided on one side close to the braking member (10), and the braking member (10) is provided with a convex portion close to the arc-shaped matching section and capable of slidingly cooperating with it; a first fixing rod (15) is provided on the upper part of the lock tongue (11), and a second fixing rod (23) is provided at a position inside the lock housing (1) between the lock plate (9) and the electromagnet (406), and a first spring (16) is provided between the first fixing rod (15) and the second fixing rod (23).

2. The ground hook lock structure of a rolling shutter door according to claim 1, characterized in that: The lock housing (1) is integrally in the shape of a hollow cuboid, and switch lock structures with the same structure and size and driven by the electromagnet (406) are symmetrically arranged at both ends of the lock housing (1).

3. The ground hook lock structure of a rolling shutter door according to claim 1 or 2, characterized in that: A clamping position portion that is recessed upward is provided at the bottom of the lock plate (9), a locking portion that is recessed upward and obliquely is provided at the bottom of the lock tongue (11), and the clamping position portion and the locking portion are correspondingly arranged; a second limiting rod (28) is provided inside the buried box (24), and the braking member (10) locks the second limiting rod (28) into the clamping position portion through the contact and separation between the convex portion and the arc-shaped matching section.

4. A rolling 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 the electromagnet (406) is fixedly installed on the support frame (407); a baffle (5) is fixedly connected to one end of the second push rod (405) close to the lock plate (9), and one end of the return spring (6) is fixedly connected to the baffle (5).

5. A rolling door floor hook lock structure according to claim 1 or 2, characterized in that: One end of a third push rod (7) is hinged to one end of the second push rod (405) close to the braking member (10), and the other end of the third push rod (7) is hinged to the upper part of the braking member (10).

6. A rolling door floor hook lock structure according to claim 1 or 2, characterized in that: A limit block (18) is provided above the locking tongue (11) inside the lock housing (1). A block positioning hole (20) is formed 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); on the top of one side of the brake member (10) close to the limit block (18), there is a notch capable of abutting against one end of the limit block (18). A spring hanging hole (21) is provided at the other end of the limit block (18). A third fixed rod (17) is fixedly connected inside the lock housing (1). A second spring (19) is provided between the third fixed rod (17) and the spring hanging hole (21).

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

8. The structure of a rolling door floor hook lock according to claim 7, characterized in that: A limit groove is formed downward at the top of the locking tongue (11). One end of the limit block (18) away from the brake member (10) is located in the limit groove; a second limit groove is formed downward at the top of the lock plate (9). A limit pin (22) capable of abutting against the second limit groove is provided on the limit block (18); when the second push rod (405) contracts and drives the top of the brake member (10) to incline towards the electromagnet (406), one end of the limit block (18) close to the brake member (10) abuts against the notch, and the other end of the limit block (18) abuts against the end of the limit groove away from the brake member (10).

9. The structure of the floor hook lock for a rolling shutter door according to claim 2, wherein: A key structure is provided in the middle of the lock housing (1). The key structure includes a fixing plate (201) fixedly connected to the inside of the lock housing (1). The key (2) penetrates into the fixing plate (201) from the outside of the lock housing (1) and is rotatably connected thereto. A gear ring (3) is sleeved on the outer side of a section of the key (2) located inside the lock housing (1). The top and bottom of the gear ring (3) are respectively meshed with a first rack (4) and a second rack (401). The first rack (4) and the second rack (401) are respectively connected to corresponding first push rods (402). The first push rod (402) is connected to the second push rod (405). A strip-shaped hole (403) is formed in the first push rod (402). A first limit rod (404) is provided in the strip-shaped hole (403). The first limit rod (404) is fixed to the lock housing (1).

10. A rolling door floor hook lock structure according to claim 2, characterized in that: A fixed shaft (25) is provided at the top of the embedded box (24). The cover plate (26) is rotatably connected to the fixed shaft (25). Limit holes (27) are symmetrically provided inside the embedded box (24). Both ends of the second limit rod (28) are respectively placed in the limit holes (27).

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