Anti-theft roller shutter door

Through mechanical structure designs such as gears, rotating cams and chains, the anti-theft problem of anti-theft rolling shutter doors under no power conditions is solved, and a fully mechanized anti-theft function and warning effect are achieved.

CN223164457UActive Publication Date: 2025-07-29TIANJIN YIXINGDA METAL DOORS & WINDOW MANUFACTURING CO LTD
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Patent Information

Application Number
CN202422184356.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-06
Publication Date
2025-07-29
Estimated Expiration
2034-09-06

AI Technical Summary

Technical Problem

Existing anti-theft rolling shutter doors cannot achieve anti-theft function when there is a lack of power supply.

Method used

Using mechanical structures such as gears, rotating cams, fixed columns, etc., the mechanical fixing and locking of the anti-theft column is achieved through the design of gear meshing and rotating cams. Combined with the transmission of the chain, sprocket and locking rod, a fully mechanized anti-theft warning is achieved.

Benefits of technology

Mechanical anti-theft protection is achieved in the absence of power and provides warnings when sabotage attempts to ensure safety and reliability.

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Abstract

The utility model discloses an anti-theft roller shutter door which comprises a roller shutter door body installed outside an installation frame, a base is welded to the outer wall of the bottom of the roller shutter door body, an anti-theft column is welded to the outer wall of the bottom of the base, and a first gear, a fourth gear, a triangular block, the anti-theft column, a butt joint column, a rotating cam, a fixing column and the like are arranged to install the fixing column. And then the rotating cam can be rotated to enable the first gear to be engaged with the fourth gear, the fourth gear to be engaged with the fifth gear and the triangular block to be engaged with the fourth gear, the anti-theft column is fixedly connected through transverse movement, and mechanical anti-theft is achieved. The mechanical anti-theft function can be achieved, meanwhile, an inner sliding rod, a first chain wheel, a second chain wheel, a chain, a movable disc and a locking insertion rod are arranged, when a rotating cam rotates, a rotating column rotates along with the rotating cam, the movable disc is matched with an arc-shaped groove through a second matching head, and the locking insertion rod moves upwards to be inserted into a fixed disc to lock a connecting rotating rod; and full-mechanical anti-theft warning is realized.
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Description

Technical Field

[0001] The utility model relates to the technical field of rolling doors, in particular to an anti-theft rolling door. Background Art

[0002] At present, people's living standards are getting better and better, and their living environments have different door structures to achieve indoor safety protection. Among them, the rolling door is a common door structure, in which the door panels with multiple joints are connected in series and are suitable for environments such as shops and supermarkets to achieve indoor protection.

[0003] After retrieval, a patent with the Chinese patent publication number CN213683867U discloses an anti-theft rolling door, including: a long box, a motor is fixedly installed on one side of the long box, a rotating rod is arranged between the two sides of the inner wall of the long box, a winding drum is sleeved on the surface of the rotating rod, a rolling door is fixedly installed on the surface of the winding drum, a protective box is arranged on the surface of the rolling door, an anti-theft lock is arranged inside the protective box, and the protective box includes an installation box, and a fixing plate is fixedly connected between the two sides of the inner wall of the installation box.

[0004] The following deficiencies exist in the above patent: the above device can play a double protection device through the anti-theft lock when in use, but this anti-theft lock is fixed by the coincidence of the fixed block and the winding drum through a controller, an alarm and a motor drive, which requires the input of external power. When the power supply is lacking, this structure cannot achieve anti-theft. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art and to propose an anti-theft rolling door.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An anti-theft rolling shutter door, comprising a rolling shutter door body installed outside an installation frame. A base is fixedly installed on the outer wall of the bottom of the rolling shutter door body. An anti-theft column is fixedly installed on the outer wall of the bottom of the base. A bottom box one is fixedly installed on the outer wall of the bottom of the installation frame. A gear four and a gear five are rotatably connected to the inner wall of the bottom of the bottom box one. The gear four and the gear five are meshed with each other. A triangular block is slidably connected to the inner wall of the bottom of the bottom box one. The gear five is meshed with the triangular block. The other end of the triangular block is matched with the anti-theft column. A gear one is rotatably connected to the inner wall of the bottom of the bottom box one. The gear one is meshed with the gear four. A connecting cylinder is fixedly installed on the outer wall of the top of the gear one. A rotating cam is rotatably connected to the inner wall of the top of the bottom box one. A fixing column is slidably connected to the inner wall of the rotating cam. A pushing plate is slidably connected to the inner side wall of the connecting cylinder. A first spring is fixedly installed between the pushing plate and the inner wall of the connecting cylinder. A docking column is movably connected to the inner side wall of the rotating cam. A bottom box two is fixedly installed on the outer side wall of the bottom box one. A switching component is arranged inside the bottom box two. The top of the bottom box one is connected with a protective cover through a hinge.

[0008] As a further scheme of the utility model: An outer protection plate is fixedly installed on the outer side wall of the installation frame. A warning component is arranged inside the outer protection plate. The warning component includes a connecting rotating rod, a second spring, and a toothed plate. The connecting rotating rod is rotatably connected to the inner wall of the outer protection plate.

[0009] As a further scheme of the utility model: A gear three is fixedly installed on the outer wall of the top of the connecting rotating rod. A winding spring is clamped between the gear three and the inner wall of the outer protection plate. An installation column is fixedly installed on the outer wall of the top of the gear three. An elastic rope is fixedly installed on the outer side wall of the installation column. The other end of the elastic rope is fixedly installed with a metal ball head.

[0010] As a further scheme of the utility model: The toothed plate is slidably connected to the inner side wall of the outer protection plate. The toothed plate is meshed with the gear three. The second spring is fixedly installed between the opposite outer walls of the toothed plate. A triangular plate is fixedly installed on the outer side wall of the rolling shutter door body. The triangular plate is matched with the toothed plate.

[0011] As a further scheme of the utility model: A fixing disk is fixedly installed on the outer wall of the bottom of the connecting rotating rod. A locking component is arranged inside the outer protection plate.

[0012] As a further scheme of the utility model: The switching component includes a matching head one and a rotating head. The rotating head is rotatably connected to the inner wall of the bottom box two. An arc-shaped plate is fixedly installed on the outer wall of the bottom of the rotating head.

[0013] As a further solution of the present invention: the outer wall of the top of the arc plate is rotatably connected to a mating head 1, the outer side wall of the rotating cam is provided with a mating groove, the mating groove is mated with the mating head 1, and the outer side wall of the rotating cam is mated with the outer side wall of the arc plate.

[0014] As a further solution of the present invention: the locking assembly includes a chain, gear two, sprocket one, and an inner sliding rod, the sprocket one is rotatably connected to the top inner wall of the bottom box one, the gear two is fixedly installed on the top outer wall of the connecting cylinder, the chain transmission is connected between gear two and the outer side wall of sprocket one, a rotating column is fixedly installed on the top outer wall of the sprocket one, an arc groove is provided on the outer side wall of the rotating column, the inner sliding rod is slidably connected to the inner wall of the outer guard plate, the outer side wall of the inner sliding rod is fixedly installed with a movable disk, and a locking plug is fixedly installed on the top outside of the movable disk, and the locking plug is movably connected to the inner wall of the fixed disk.

[0015] Compared with the prior art, the present invention provides an anti-theft rolling shutter door with the following beneficial effects:

[0016] 1. The utility model is provided with a structure including gear 1, gear 4, a triangular block, an anti-theft column, a docking station, a rotating cam, a fixed column, etc. When in use, the fixed column can be installed to connect the rotating cam with the connecting cylinder. Then, the rotating cam can be rotated to make gear 1 mesh with gear 4, and gear 4 mesh with gear 5. The triangular block then moves laterally when meshing with gear 4, thereby fixing the anti-theft column and realizing mechanical anti-theft.

[0017] 2. The utility model is provided with an arc plate, a matching groove, and a matching head. When in use, the arc plate is rotated by a hexagonal wrench so that the matching head is matched with the matching groove, driving the rotating cam to rotate. After the rotation is completed, the hexagonal wrench can be directly pulled out to cancel it, thereby ensuring the anti-theft effect.

[0018] 3. The utility model is provided with an inner slide rod, sprocket 1, sprocket 2, chain, movable disk, and locking rod. When the rotating cam rotates, the rotating column rotates under the transmission of sprocket 1, sprocket 2, and chain. The movable disk cooperates with the matching head 2 and the arc groove, and the locking rod moves upward and is inserted into the fixed disk to lock the connecting rod, thereby realizing a fully mechanized anti-theft warning.

[0019] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an anti-theft rolling shutter door proposed by the utility model;

[0021] Figure 2 This is a rear structural diagram of an anti-theft rolling shutter door proposed by the present invention;

[0022] Figure 3 Schematic cross-sectional structure diagram of bottom box 1 and bottom box 2 of an anti-theft rolling shutter door proposed by the present utility model;

[0023] Figure 4 Internal structure schematic diagram of bottom box 1 of an anti-theft rolling shutter door proposed by the present utility model;

[0024] Figure 5 Schematic cross-sectional structure diagram of docking column and gear 1 of an anti-theft rolling shutter door proposed by the present utility model;

[0025] Figure 6 Schematic cross-sectional structure diagram of outer protection plate of an anti-theft rolling shutter door proposed by the present utility model;

[0026] Figure 7 Schematic structure diagram of rotating column of an anti-theft rolling shutter door proposed by the present utility model.

[0027] In the figure: 1. Outer protection plate; 2. Bottom box 1; 3. Base; 4. Rolling shutter door main body; 5. Bottom box 2; 6. Protection cover; 7. Docking column; 8. Fitting head 1; 9. Rotating head; 10. Arc plate; 11. Fitting groove; 12. Rotating cam; 13. Gear 1; 14. Chain; 15. Connecting cylinder; 16. Gear 2; 17. Fixed column; 18. Pushing plate; 19. Spring 1; 20. Sprocket 1; 21. Rotating column; 22. Moving disk; 23. Locking insertion rod; 24. Connecting rotating rod; 25. Torsion spring; 26. Spring 2; 27. Tooth plate; 28. Gear 3; 29. Metal ball head; 30. Elastic rope; 31. Mounting column; 32. Fitting head 2; 33. Arc groove; 34. Mounting frame; 35. Gear 4; 36. Gear 5; 37. Triangular block; 38. Anti-theft column; 39. Triangular plate; 40. Fixed disk; 41. Inner sliding rod. Specific embodiments

[0028] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0029] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0030] Embodiment 1:

[0031] An anti-theft rolling shutter door. In order to achieve anti-theft protection without power input, as Figures 1-7 shown, it includes a rolling shutter door main body 4 installed outside an installation frame 34. A base 3 is welded to the outer wall of the bottom of the rolling shutter door main body 4. An anti-theft column 38 is welded to the outer wall of the bottom of the base 3. A bottom box one 2 is welded to the outer wall of the bottom of the installation frame 34. A gear four 35 and a gear five 36 are rotatably connected to the inner wall of the bottom of the bottom box one 2. The gear four 35 and the gear five 36 are meshed with each other. A triangular block 37 is slidably connected to the inner wall of the bottom of the bottom box one 2. The gear five 36 is meshed with the triangular block 37. The other end of the triangular block 37 is matched with the anti-theft column 38. A gear one 13 is rotatably connected to the inner wall of the bottom of the bottom box one 2. The gear one 13 is meshed with the gear four 35. A connecting cylinder 15 is welded to the outer wall of the top of the gear one 13. A rotating cam 12 is rotatably connected to the inner wall of the top of the bottom box one 2. A fixing column 17 is slidably connected to the inner wall of the rotating cam 12. A push plate 18 is slidably connected to the inner side wall of the connecting cylinder 15. A first spring 19 is welded between the push plate 18 and the inner wall of the connecting cylinder 15. A docking column 7 is movably connected to the inner side wall of the rotating cam 12. A bottom box two 5 is welded to the outer side wall of the bottom box one 2. A switching assembly is arranged inside the bottom box two 5. A protection cover 6 is connected to the top of the bottom box one 2 through a hinge;

[0032] When in use, pull the rolling shutter door main body 4 so that the anti-theft column 38 at the bottom is inserted into the bottom box one 2. Open the protection cover 6 and insert the docking column 7 into the inner wall of the rotating cam 12. The fixing column 17 pushes the push plate 18 to compress the first spring 19, so that the rotating cam 12 and the connecting cylinder 15 are fixedly connected. Subsequently, rotate the rotating cam 12 through the switching assembly. The rotating cam 12 drives the gear one 13 at the bottom of the connecting cylinder 15 to rotate. The gear one 13 meshes with and drives the gear four 35, and the gear four 35 meshes with the gear five 36 to make it rotate. Further, the triangular block 37 moves horizontally under the meshing of the gear five 36, and the triangular block 37 fixes the anti-theft column 38. Subsequently, pull out the docking column 7 to cancel the fixed connection between the rotating cam 12 and the connecting cylinder 15. The switching assembly cannot rotate the rotating cam 12, so that the triangular block 37 mechanically locks the anti-theft column 38 for a long time. When it is necessary to cancel the locking of the anti-theft column 38, insert the docking column 7 again, and reverse-rotate the rotating cam 12 through the switching assembly to cancel the locking of the triangular block 37 on the anti-theft column 38.

[0033] The switching assembly includes a first mating head 8 and a rotating head 9. The rotating head 9 is rotatably connected to the inner wall of the bottom box two 5. An arc-shaped plate 10 is welded to the outer wall of the bottom of the rotating head 9. The first mating head 8 is rotatably connected to the outer wall of the top of the arc-shaped plate 10. A mating groove 11 is formed in the outer side wall of the rotating cam 12. The mating groove 11 is matched with the first mating head 8. The outer side wall of the rotating cam 12 is matched with the outer side wall of the arc-shaped plate 10;

[0034] During use, the rotating head 9 can be rotated by a hexagonal wrench so that the mating head one 8 at the top of the arc-shaped plate 10 mates with the mating groove 11, driving the rotating cam 12 to rotate. Just pull out the hexagonal wrench when canceling the rotation.

[0035] An outer guard plate 1 is welded to the outer side wall of the installation frame 34. A warning component is arranged inside the outer guard plate 1. The warning component includes a connecting rotating rod 24, a second spring 26, and a toothed plate 27. The connecting rotating rod 24 is rotatably connected to the inner wall of the outer guard plate 1. A third gear 28 is welded to the outer wall of the top of the connecting rotating rod 24. A coil spring 25 is clamped between the third gear 28 and the inner wall of the outer guard plate 1. An installation column 31 is welded to the outer wall of the top of the third gear 28. An elastic rope 30 is adhered to the outer side wall of the installation column 31. The other end of the elastic rope 30 is adhered to a metal ball head 29. The toothed plate 27 is slidably connected to the inner side wall of the outer guard plate 1. The toothed plate 27 meshes with the third gear 28. The second spring 26 is welded between the opposite outer walls of the toothed plate 27. A triangular plate 39 is welded to the outer side wall of the rolling door main body 4. The triangular plate 39 cooperates with the toothed plate 27. A fixed disk 40 is welded to the outer wall of the bottom of the connecting rotating rod 24. A locking component is arranged inside the outer guard plate 1;

[0036] When the triangular block 37 releases the fixation of the anti-theft column 38 and pulls up the rolling door main body 4 by rotating the rotating cam 12, the locking component inside the outer guard plate 1 locks the fixed disk 40. When the triangular plate 39 passes through the toothed plate 27 and pushes the toothed plate 27 to cancel the meshing with the third gear 28, the third gear 28 does not rotate. When the fixation of the triangular block 37 to the anti-theft column 38 is forcibly damaged and the rolling door main body 4 is pulled up, the locking component does not lock the fixed disk 40. When the [unclear "9"] passes through the toothed plate 27 and pushes the toothed plate 27 to cancel the meshing with the third gear 28, the third gear 28 rotates under the drive of the coil spring 25, thereby driving the elastic rope 30 outside the installation column 31 to swing the metal ball head 29 to strike the inner wall of the outer guard plate 1, realizing mechanical warning and anti-theft.

[0037] Working principle: When in use, pull the shutter door body 4 so that the anti-theft column 38 at the bottom is inserted into the bottom box 2, insert the docking column 7 into the inner wall of the rotating cam 12, and the fixed column 17 pushes the pushing plate 18 to squeeze the spring 19, so that the rotating cam 12 and the connecting tube 15 are fixedly connected. Then, use the hexagonal wrench to rotate the rotating head 9 so that the matching head 8 at the top of the arc plate 10 is matched with the matching groove 11, driving the rotating cam 12 to rotate, driving the gear 13 at the bottom of the connecting tube 15 to rotate, and the gear 13 is engaged with the gear 4 35, and the gear 4 35 is engaged with the gear 5 36. Rotate, and then the triangular block 37 moves laterally under the engagement of gear five 36, and the triangular block 37 fixes the anti-theft column 38 to achieve purely mechanical locking. When the fixation of the triangular block 37 to the anti-theft column 38 is forcibly destroyed and the rolling shutter door body 4 is pulled upward, the locking assembly does not lock the fixed plate 40. When 9 passes through the tooth plate 27 to push the tooth plate 27 to cancel the engagement with gear three 28, gear three 28 rotates under the drive of the coil spring 25, and then drives the elastic rope 30 outside the mounting column 31 to swing the metal ball head 29 to knock on the inner wall of the outer guard plate 1, thereby achieving mechanical warning and anti-theft.

[0038] Embodiment 2:

[0039] A burglar-proof rolling shutter door, such as Figures 1-7 As shown, in order to achieve purely mechanical locking of the fixed disk 40; this embodiment makes the following supplements on the basis of Example 1: the locking assembly includes a chain 14, a gear 2 16, a sprocket 20, and an inner slide rod 41, the sprocket 20 is rotatably connected to the top inner wall of the bottom box 2, the gear 2 16 is welded to the top outer wall of the connecting cylinder 15, the chain 14 is transmission-connected between the gear 2 16 and the outer side wall of the sprocket 20, the top outer wall of the sprocket 20 is welded with a rotating column 21, the outer side wall of the rotating column 21 is provided with an arc groove 33, the inner slide rod 41 is slidably connected to the inner wall of the outer guard plate 1, the outer side wall of the inner slide rod 41 is welded with a movable disk 22, the top outer side of the movable disk 22 is welded with a locking plug 23, and the locking plug 23 is movably connected to the inner wall of the fixed disk 40;

[0040] Working principle: When the matching head 18 at the top of the arc plate 10 cooperates with the rotating cam 12 to rotate the gear 13, the gear 2 16 installed on the connecting tube 15 at the top of the gear 13 drives the sprocket 20 to rotate through the chain 14. When the sprocket 20 rotates, the movable plate 22 moves upward under the cooperation of the matching head 2 32 and the arc groove 33 opened on the outside of the rotating column 21. The locking rod 23 is inserted into the fixed plate 40 to lock the connecting rotating rod 24, avoiding the warning component from opening with the movement of the triangle plate 39 when the lock of the anti-theft column 38 is normally canceled, thereby realizing fully mechanized anti-theft.

[0041] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. An anti-theft rolling shutter door, comprising a rolling shutter door body (4) installed outside an installation frame (34), characterized in that, A base (3) is fixedly installed on the outer wall of the bottom of the rolling shutter door body (4). An anti-theft column (38) is fixedly installed on the outer wall of the bottom of the base (3). A bottom box one (2) is fixedly installed on the outer wall of the bottom of the installation frame (34). A gear four (35) and a gear five (36) are rotatably connected to the inner wall of the bottom of the bottom box one (2). The gear four (35) meshes with the gear five (36). A triangular block (37) is slidably connected to the inner wall of the bottom of the bottom box one (2). The gear five (36) meshes with the triangular block (37). The other end of the triangular block (37) cooperates with the anti-theft column (38). A gear one (13) is rotatably connected to the inner wall of the bottom of the bottom box one (2). The gear one (13) meshes with the gear four (35). A connecting cylinder (15) is fixedly installed on the outer wall of the top of the gear one (13). A rotating cam (12) is rotatably connected to the inner wall of the top of the bottom box one (2). A fixing column (17) is slidably connected to the inner wall of the rotating cam (12). A pushing plate (18) is slidably connected to the inner side wall of the connecting cylinder (15). A first spring (19) is fixedly installed between the pushing plate (18) and the inner wall of the connecting cylinder (15). A docking column (7) is movably connected to the inner side wall of the rotating cam (12). A bottom box two (5) is fixedly installed on the outer side wall of the bottom box one (2). A switching assembly is provided inside the bottom box two (5). A protective cover (6) is connected to the top of the bottom box one (2) by a hinge.

2. The anti-theft rolling shutter door according to claim 1, characterized in that, An outer protection plate (1) is fixedly installed on the outer side wall of the installation frame (34). A warning assembly is provided inside the outer protection plate (1). The warning assembly includes a connecting rotating rod (24), a second spring (26), and a toothed plate (27). The connecting rotating rod (24) is rotatably connected to the inner wall of the outer protection plate (1).

3. The anti-theft rolling shutter door according to claim 2, characterized in that, A gear three (28) is fixedly installed on the outer wall of the top of the connecting rotating rod (24). A torsion spring (25) is clamped between the gear three (28) and the inner wall of the outer protection plate (1). An installation column (31) is fixedly installed on the outer wall of the top of the gear three (28). An elastic rope (30) is fixedly installed on the outer side wall of the installation column (31). The other end of the elastic rope (30) is fixedly installed with a metal ball head (29).

4. A theft-proof rolling shutter door according to claim 3, characterized in that, The toothed plate (27) is slidably connected to the inner side wall of the outer protection plate (1). The toothed plate (27) meshes with the gear three (28). The second spring (26) is fixedly installed between the opposite outer walls of the toothed plate (27). A triangular plate (39) is fixedly installed on the outer side wall of the rolling shutter door body (4). The triangular plate (39) cooperates with the toothed plate (27).

5. The anti-theft rolling shutter door according to claim 4, characterized in that, A fixing disk (40) is fixedly installed on the outer wall of the bottom of the connecting rotating rod (24). A locking assembly is provided inside the outer protection plate (1).

6. The anti-theft rolling shutter door according to claim 1, characterized in that, The switching assembly includes a mating head one (8) and a rotating head (9). The rotating head (9) is rotatably connected to the inner wall of the bottom box two (5). An arc-shaped plate (10) is fixedly installed on the outer wall of the bottom of the rotating head (9).

7. A theft-proof rolling shutter door according to claim 6, characterized in that, The outer wall of the top of the arc plate (10) is rotatably connected to a mating head (8), and the outer side wall of the rotating cam (12) is provided with a mating groove (11), the mating groove (11) is mated with the mating head (8), and the outer side wall of the rotating cam (12) is mated with the outer side wall of the arc plate (10).

8. A burglary-preventing rolling shutter door according to claim 5, characterized in that, The locking assembly includes a chain (14), a gear 2 (16), a sprocket 1 (20), and an inner slide rod (41). The sprocket 1 (20) is rotatably connected to the inner wall of the top of the bottom box 1 (2). The gear 2 (16) is fixedly installed on the outer wall of the top of the connecting tube (15). The chain (14) is transmission-connected between the gear 2 (16) and the outer side wall of the sprocket 1 (20). A rotating column (21) is fixedly installed on the outer wall of the rotating column (21). An arc groove (33) is provided on the outer side wall of the rotating column (21). The inner slide rod (41) is slidably connected to the inner wall of the outer guard plate (1). A movable disk (22) is fixedly installed on the outer side of the top of the movable disk (22). A locking plug rod (23) is fixedly installed on the outer side. The locking plug rod (23) is movably connected to the inner wall of the fixed disk (40).

Citation Information

Patent Citations

  • Anti-theft roller shutter door

    CN213683867U