Anti-theft door with cat eye

Abstract

An anti-theft door with a cat eye comprises a door body and a cat eye structure. A mounting hole is formed in the door body. The cat eye structure comprises an inner tube and an outer tube. A first clamping ring is fixed to the front end of the outer pipe. Through holes are formed in the left side and the right side of the first clamping ring. A counter bore is formed in the outer side wall of the inner pipe. A fixing ring is fixed to the front side of the door body. Mounting bases are fixed to the outer side walls of the left side and the right side of the fixing ring correspondingly. And a sliding cavity is formed in the mounting seat. A sliding plate is slidably connected into the sliding cavity. An inserting rod is fixed to one side of the sliding plate. The other end of the inserting rod is inserted into the counter bore. Pull rods are fixed to the other sides of the sliding plates. The other end of the pull rod penetrates out of the mounting seat and is fixed with a pull block. The pull rod is sleeved with a first spring. The cat eye structure and the door body are stably connected, the inner pipe and the outer pipe are both connected with the fixing ring on the front side of the door body, the cat eye structure can only be detached from the front side of the door body, the cat eye structure cannot be detached from the rear side of the door body, and therefore safety and anti-theft performance are improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to anti-theft doors, in particular to an anti-theft door with a cat's eye. Background Art

[0002] An anti-theft door is a door with certain security protection performance. It is equipped with an anti-theft lock, which can resist abnormal opening under certain conditions within a certain period of time. It has certain security protection performance and meets the corresponding anti-theft security level. The full name of the anti-theft door is "anti-theft security door". It has both anti-theft and security performance.

[0003] The existing anti-theft door usually has a mounting hole, and then a cat's eye door mirror is installed in the mounting hole. The cat's eye in the existing technology is usually connected by threads, so criminals can directly disassemble the parts of the cat's eye from outside the door, and then insert a wire or other small tools into the door through the mounting hole to easily open the door.

[0004] The Chinese patent with announcement number CN209539208U is an anti-dismantling cat's eye, the Chinese patent with announcement number CN210948405U is an anti-theft cat's eye, the Chinese patent with announcement number CN220395571U is an anti-theft door with good heat insulation effect, and the Chinese patent with announcement number CN205805366U is a new type of anti-theft cat's eye, all of which have made improvement plans for the problem that the cat's eye is easy to be removed.

[0005] At the same time, the utility model also proposes a new technical solution to solve the problem that the cat's eye can be disassembled outside the door, the safety is low, and the anti-theft performance is poor. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an anti-theft door with a cat's eye, aiming to achieve a technical effect in which the cat's eye structure is stably connected to the door body and the cat's eye structure cannot be removed from outside the door body, thereby improving safety and anti-theft performance.

[0007] A burglar-proof door with a cat's eye, comprising a door body and a cat's eye structure, wherein the door body is provided with a mounting hole for mounting the cat's eye structure, and the cat's eye structure comprises an inner tube and an outer tube, wherein the outer tube is inserted into the mounting hole in a matching manner, and a first clamping ring that fits the front side of the door body is integrally formed at the front end thereof, wherein the inner tube is inserted into the outer tube in a matching manner, and a second clamping ring that fits the rear side of the door body is integrally formed at the rear end thereof, and a plurality of lenses are installed inside the inner tube;

[0008] The front end of the inner tube extends into the first clamp ring and fits with the inner side wall of the first clamp ring. The left and right sides of the first clamp ring are both provided with through holes, and the outer side wall of the inner tube is provided with countersunk holes corresponding to the through holes.

[0009] A fixing ring sleeved on the outside of the first clamping ring is fixed on the front side of the door body, and mounting seats are fixed on the left and right outer walls of the fixing ring. A sliding cavity corresponding to the through hole is opened inside the mounting seat, and a slide plate is slidably connected in the sliding cavity. An insertion rod is fixed on the side of the slide plate close to the fixing ring, and the other end of the insertion rod passes through the mounting seat in a sliding connection manner, passes through the through hole and is inserted into the countersunk hole. A pull rod is fixed on the side of the slide plate away from the fixing ring, and the other end of the pull rod passes through the mounting seat in a sliding connection manner and is fixed with a pull block, and the outside of the pull rod is sleeved with a first spring fixed between the slide plate and the cavity wall of the sliding cavity.

[0010] By adopting the above technical solution, when the cat's eye structure needs to be installed on the door body, the pull rod is first pulled by the pull block, and the pull rod moves out of the sliding cavity, thereby driving the sliding plate to move back toward the fixed ring. The sliding rod drives the insertion rod to move back toward the fixed ring until the insertion rod is completely retracted into the sliding cavity. At this time, the first spring will be compressed to form a rebound force toward the fixed ring.

[0011] Then the outer tube is inserted into the mounting hole from the front side of the door body until the first clamping ring fits the front side of the door body and is inserted into the fixing ring in a matching connection. At this time, the position of the through hole corresponds to the sliding cavity.

[0012] Then the inner tube is inserted into the outer tube from the rear side of the door body until the second clamping ring fits with the rear side of the door body. At this time, the front end of the inner tube extends into the first clamping ring, and the countersunk hole corresponds to the through hole.

[0013] Then release the pull block. Under the action of the rebound force of the first spring, the pull block, the pull rod, the slide plate and the insertion rod all move and reset. One end of the insertion rod passes through the mounting seat in a sliding connection, passes through the through hole and is inserted into the countersunk hole. Thus, the first clamp ring, the inner tube and the fixed ring are fixed. Since the first clamp ring is integrally formed with the outer tube and the fixed ring is fixed on the door body, both the outer tube and the inner tube can be fixed on the door body.

[0014] Similarly, when the cat's eye structure needs to be disassembled, the pull block is pulled and the inner tube and the outer tube are sequentially pulled out from the installation hole.

[0015] The cat's eye structure of the utility model is stably connected to the door body, and both the inner tube and the outer tube are connected to the fixing ring on the front side of the door body. The cat's eye structure can only be disassembled from the front side of the door body, but cannot be disassembled from the rear side of the door body, thereby improving safety and anti-theft performance.

[0016] The utility model is further configured as follows: a plurality of first positioning grooves are formed on the inner side wall of the fixing ring, and a first positioning block for slidingly inserting into the first positioning groove is fixed on the outer side wall of the first clamping ring.

[0017] By adopting the above technical solution, the first positioning block is aligned with and inserted into the first positioning groove, so that the first clamping ring and the outer tube can be quickly positioned so that the through hole corresponds to the sliding cavity.

[0018] The utility model is further configured as follows: a plurality of second positioning grooves are provided on the inner side wall of the outer tube, and a second positioning block for slidingly inserting into the second positioning grooves is fixed on the outer side wall of the inner tube.

[0019] By adopting the above technical solution, the second positioning block is aligned with and inserted into the second positioning groove, so that the inner tube can be quickly positioned so that the countersunk hole corresponds to the through hole.

[0020] The utility model is further configured as follows: an upper fixing seat is integrally formed at the upper end of the outer side wall of the fixing ring, a rotating shaft is rotatably connected to the front end of the upper fixing seat, a first cover plate corresponding to the upper fixing seat is fixed on the rotating shaft, and a second cover plate corresponding to the fixing ring is integrally formed at the bottom end of the first cover plate.

[0021] By adopting the above technical solution, when it is necessary to observe through the cat's eye structure, the second cover plate is rotated upward, the second cover plate drives the first cover plate, and the first cover plate drives the rotating shaft to rotate on the upper fixed seat, so that the second cover plate is rotated open, and the second cover plate no longer blocks the fixing ring and the cat's eye structure. Similarly, the second cover plate is rotated downward to block the fixing ring and the cat's eye structure, which can prevent outsiders from peeping through the cat's eye structure, and the setting of the second cover plate also plays the role of the next layer of protection for the cat's eye structure after it is damaged.

[0022] The utility model is further configured as follows: a cavity is provided in the upper fixing seat, a torsion spring is installed in the cavity, the rear end of the rotating shaft penetrates into the cavity and is fixedly connected to one end of the torsion spring, and the other end of the torsion spring is fixedly connected to the cavity wall of the cavity.

[0023] By adopting the above technical solution, when the first cover plate and the second cover plate rotate upward to drive the rotating shaft to rotate, the torsion spring is deformed and forms a rebound force. After the first cover plate and the second cover plate are loosened, the first cover plate and the second cover plate automatically rotate downward and reset under the action of the rebound force of the torsion spring, thereby avoiding the situation where the user forgets to rotate the first cover plate and the second cover plate downward to cover the cat's eye structure after rotating them open.

[0024] The utility model is further configured as follows: a third cover plate is integrally formed at the bottom end of the second cover plate, a connecting hole is provided on the third cover plate, a lower fixing seat corresponding to the third cover plate is integrally formed at the lower end of the outer wall of the fixing ring, a sliding hole is provided on the front side of the lower fixing seat, a connecting rod is slidably connected in the sliding hole, the rear end of the connecting rod is located in the sliding hole and a second spring is fixedly connected to the inner bottom wall of the sliding hole, and the front end of the connecting rod passes through the connecting hole and is arranged in an arc shape.

[0025] By adopting the above technical solution, when the second cover plate rotates downward to block the fixing ring and the cat's eye structure, the third cover plate rotates to cover the lower fixing seat. In the process of the third cover plate rotating downward, its outer side wall contacts the front end arc surface of the connecting rod, and the force acting on the front end arc surface of the connecting rod can be decomposed into a force that moves the connecting rod into the sliding hole, thereby pressing the connecting rod into the sliding hole. The second spring is compressed to form a rebound force toward the outside of the sliding hole. When the connecting hole corresponds to the sliding hole, under the action of the rebound force of the second spring, the connecting rod passes through the connecting hole, thereby fixing the third cover plate. Thereby, the second cover plate is stably blocked from the fixing ring and the cat's eye structure, further enhancing the protective effect of the second cover plate after the cat's eye structure is damaged. Similarly, by pressing the connecting rod first and then rotating the third cover plate upward, the second cover plate can be driven to rotate upward and staggered with the cat's eye structure.

[0026] The utility model is further configured as follows: a limiting plate is fixed on the left outer side wall of the lower fixing seat.

[0027] By adopting the above technical solution, after the third cover plate rotates downward and contacts the limit plate, the connecting hole just corresponds to the sliding hole, avoiding the connection hole and the sliding hole missing each other due to the fast rotation and reset speed of the third cover plate under the action of the rebound force of the torsion spring.

[0028] Compared with the prior art, the beneficial effects of the utility model are:

[0029] 1. A burglar-proof door with a cat's eye. The cat's eye structure of the utility model is stably connected to the door body, and both the inner tube and the outer tube are connected to the fixing ring on the front side of the door body. The cat's eye structure can only be disassembled from the front side of the door body, but cannot be disassembled from the rear side of the door body, thereby improving safety and anti-theft performance.

[0030] 2. The first cover plate, the second cover plate and the third cover plate can automatically rotate downward to reset, so as to avoid the situation that the user rotates the first cover plate and the second cover plate open and forgets to rotate them downward to cover the cat's eye structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural schematic diagram of an anti-theft door with a cat's eye according to the utility model;

[0032] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0033] Figure 3 It is a partial cross-sectional view of a burglary-proof door with a cat's eye in the side view direction of the utility model;

[0034] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0035] Figure 5 for Figure 3 Enlarged view of point C in the middle;

[0036] Figure 6 The utility model is a cross-sectional view of a burglary-proof door with a cat's eye in the main viewing direction.

[0037] 1. Door body; 2. Mounting hole; 3. Inner tube; 4. Outer tube; 5. Second positioning groove; 6. First retaining ring; 7. Through hole; 8. First positioning block; 9. Second positioning block; 10. Second retaining ring; 11. Lens; 12. Countersunk hole; 13. Fixed ring; 14. First positioning groove; 15. Mounting seat; 16. Sliding cavity; 17. Slide plate; 18. Insert rod; 19. Pull rod; 20. Pull block; 21. First spring; 22. Upper fixed seat; 23. Lower fixed seat; 24. Cavity; 25. Torsion spring; 26. Rotating shaft; 27. Limiting plate; 28. Sliding hole; 29. ​​Connecting rod; 30. Second spring; 31. First cover plate; 32. Second cover plate; 33. Third cover plate; 34. Connecting hole. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] A burglar-proof door with a cat's eye, such as Figure 1-Figure 6 As shown, it comprises a door body 1 and a cat's eye structure. The door body 1 is provided with a mounting hole 2 for mounting the cat's eye structure.

[0040] The cat's eye structure includes an inner tube 3 and an outer tube 4 .

[0041] The outer tube 4 is inserted into the mounting hole 2 in a matching connection manner. A plurality of second positioning grooves 5 are provided on the inner side wall of the outer tube 4. A first clamping ring 6 is integrally formed at the front end of the outer tube 4 and is fitted with the front side of the door body 1. Through holes 7 are provided on both the left and right sides of the first clamping ring 6. A first positioning block 8 is fixed on the outer side wall of the first clamping ring 6.

[0042] The inner tube 3 is inserted into the outer tube 4 in a mating connection. A second positioning block 9 for slidingly inserting into the second positioning groove 5 is fixed on the outer wall of the inner tube 3. A second clamping ring 10 is integrally formed at the rear end of the inner tube 3 to fit with the rear side of the door body 1. A plurality of lenses 11 are installed inside the inner tube 3. The front end of the inner tube 3 extends into the first clamping ring 6 and fits with the inner wall of the first clamping ring 6. A countersunk hole 12 corresponding to the through hole 7 is opened on the outer wall of the inner tube 3.

[0043] A fixing ring 13 sleeved on the outside of the first clamping ring 6 is fixed to the front side of the door body 1. A plurality of first positioning grooves 14 for the first positioning blocks 8 to be slidably inserted are provided on the inner side wall of the fixing ring 13.

[0044] A mounting seat 15 is integrally formed on the outer side walls on both the left and right sides of the fixing ring 13. A sliding cavity 16 corresponding to the through hole 7 is provided inside the mounting seat 15. A slide plate 17 is slidably connected in the slide cavity 16. An insertion rod 18 is fixed to the side of the slide plate 17 close to the fixing ring 13. The other end of the insertion rod 18 passes through the mounting seat 15 in a sliding connection manner, passes through the through hole 7 and is inserted into the countersunk hole 12. A pull rod 19 is fixed to the side of the slide plate 17 away from the fixing ring 13. The other end of the pull rod 19 passes through the mounting seat 15 in a sliding connection manner and is fixed with a pull block 20. The outside of the pull rod 19 is provided with a first spring 21 fixed between the slide plate 17 and the cavity wall of the sliding cavity 16.

[0045] An upper fixing seat 22 and a lower fixing seat 23 are formed integrally with the outer side walls on the upper and lower sides of the fixing ring 13, respectively. A cavity 24 is provided in the upper fixing seat 22, and a torsion spring 25 is installed in the cavity 24. A rotating shaft 26 is rotatably connected to the front side of the upper fixing seat 22. The rear end of the rotating shaft 26 penetrates into the cavity 24 and is fixedly connected to one end of the torsion spring 25, and the other end of the torsion spring 25 is fixedly connected to the cavity wall of the cavity 24. A limiting plate 27 is fixed on the left outer side wall of the lower fixing seat 23. A sliding hole 28 is provided on the front side of the lower fixing seat 23. A connecting rod 29 is slidably connected in the sliding hole 28. The rear end of the connecting rod 29 is located in the sliding hole 28 and a second spring 30 is fixedly connected to the inner bottom wall of the sliding hole 28. The front end of the connecting rod 29 penetrates through the sliding hole 28 and is arranged in an arc shape.

[0046] A first cover plate 31 for shielding the upper fixing seat 22 is fixed to the front end of the rotating shaft 26, a second cover plate 32 for shielding the fixing ring 13 is integrally formed at the bottom end of the first cover plate 31, and a third cover plate 33 for shielding the lower fixing seat 23 is integrally formed at the bottom end of the second cover plate 32. A connecting hole 34 corresponding to the sliding hole 28 and through which the connecting rod 29 can pass is formed on the third cover plate 33.

[0047] Working principle:

[0048] When the cat's eye structure needs to be installed on the door body 1, the pull rod 19 is first pulled by the pull block 20, and the pull rod 19 moves out of the sliding cavity 16, thereby driving the sliding plate 17 to move back toward the fixing ring 13. The sliding rod drives the insertion rod 18 to move back toward the fixing ring 13 until the insertion rod 18 is completely retracted into the sliding cavity 16. At this time, the first spring 21 will be compressed to form a rebound force toward the fixing ring 13.

[0049] Then pick up the outer tube 4, align the first positioning block 8 with the first positioning groove 14, and insert the outer tube 4 into the mounting hole 2 from the front side of the door body 1. Until the rear side of the first clamping ring 6 fits with the front side of the door body 1, the outer side wall of the first clamping ring 6 fits with the inner side wall of the fixing ring 13, and the first positioning block 8 is completely inserted into the first positioning groove 14. At this time, the position of the through hole 7 corresponds to the sliding cavity 16.

[0050] Then pick up the inner tube 3, align the second positioning block 9 with the second positioning groove 5, and insert the inner tube 3 into the outer tube 4 from the rear side of the door body 1. Until the front side of the second clamping ring 10 fits with the rear side of the door body 1, and the second positioning block 9 is completely inserted into the second positioning groove 5. At this time, the front end of the inner tube 3 extends into the first clamping ring 6, and the countersunk hole 12 corresponds to the through hole 7.

[0051] Then, the pull block 20 is released. Under the action of the rebound force of the first spring 21, the pull block 20, the pull rod 19, the slide plate 17 and the insertion rod 18 are all moved and reset. One end of the insertion rod 18 passes through the mounting seat 15 in a sliding connection manner, passes through the through hole 7 and is inserted into the counterbore 12. Thus, the first clamping ring 6, the inner tube 3 and the fixing ring 13 are fixed. Since the first clamping ring 6 and the outer tube 4 are integrally formed, and the fixing ring 13 is fixed on the door body 1, both the outer tube 4 and the inner tube 3 can be fixed on the door body 1.

[0052] Similarly, when the cat's eye structure needs to be disassembled, the pull block 20 is pulled, and the inner tube 3 and the outer tube 4 are sequentially drawn out from the mounting hole 2 .

[0053] When it is necessary to observe through the cat's eye structure, the connecting rod 29 is pressed, and the connecting rod 29 moves into the sliding hole 28. The second spring 30 is compressed to form a rebound force toward the outside of the sliding hole 28. When the arc-shaped end of the connecting rod 29 is located in the connecting hole 34, the third cover plate 33 is directly rotated upward. The hole wall of the connecting hole 34 forms a force on the arc-shaped end of the connecting rod 29, and the force can be decomposed into a force that causes the connecting rod 29 to move into the sliding hole 28, thereby continuing to press the connecting rod 29 into the sliding hole 28. The third cover plate 33 can be smoothly rotated upward. The third cover plate 33 drives the second cover plate 32, and the second cover plate 32 drives the first cover plate 31. The first cover plate 31 drives the rotating shaft 26 to rotate. As a result, the second cover plate 32 rotates upward to stagger with the cat's eye structure, and the second cover plate 32 no longer blocks the fixing ring 13 and the cat's eye structure.

[0054] When the second cover plate 32 is required to cover the cat's eye structure, the first cover plate 31, the second cover plate 32 and the third cover plate 33 are released. Since the torsion spring 25 is deformed and forms a rebound force when the rotating shaft 26 rotates, after the first cover plate 31, the second cover plate 32 and the third cover plate 33 are released, the first cover plate 31, the second cover plate 32 and the third cover plate 33 automatically rotate downward and reset under the action of the rebound force of the torsion spring 25. During the downward rotation of the third cover plate 33, its outer side wall contacts the front end arc surface of the connecting rod 29, and the force acting on the front end arc surface of the connecting rod 29 can be decomposed into a force that moves the connecting rod 29 into the sliding hole 28, thereby pressing the connecting rod 29 into the sliding hole 28. The second spring 30 is compressed to form a rebound force toward the outside of the sliding hole 28. When the third cover plate 33 contacts the limit plate 27, the connecting hole 34 just corresponds to the sliding hole 28. Under the action of the rebound force of the second spring 30, the connecting rod 29 passes through the connecting hole 34, thereby fixing the third cover plate 33. As a result, the second cover plate 32 is stably shielded from the fixing ring 13 and the cat's eye structure. The setting of the torsion spring 25 can prevent the user from forgetting to rotate the first cover plate 31 and the second cover plate 32 downward to shield the cat's eye structure after rotating them open. The setting of the second cover plate 32 can prevent outsiders from peeping through the cat's eye structure, and the second cover plate 32 can stably shield the cat's eye structure, and also plays the role of the next layer of protection for the cat's eye structure after it is damaged.

[0055] The cat's eye structure of the utility model is stably connected to the door body 1, and the inner tube 3 and the outer tube 4 are both connected to the fixing ring 13 on the front side of the door body 1. The cat's eye structure can only be disassembled from the front side of the door body 1, but cannot be disassembled from the back side of the door body 1, thereby improving safety and anti-theft performance.

[0056] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0057] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0058] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0059] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An anti-theft door with a cat's eye, comprising a door body (1) and a cat's eye structure, wherein the door body (1) is provided with a mounting hole (2) for mounting the cat's eye structure, the cat's eye structure comprises an inner tube (3) and an outer tube (4), the outer tube (4) is inserted into the mounting hole (2) in a matching manner, and a first clamping ring (6) is integrally formed at the front end thereof and is fitted with the front side of the door body (1), the inner tube (3) is inserted into the outer tube (4) in a matching manner, and a second clamping ring (10) is integrally formed at the rear end thereof and is fitted with the rear side of the door body (1), a plurality of lenses (11) are installed inside the inner tube (3), characterized in that: The front end of the inner tube (3) extends into the first clamping ring (6) and fits with the inner wall of the first clamping ring (6); through holes (7) are provided on both left and right sides of the first clamping ring (6); and countersunk holes (12) corresponding to the through holes (7) are provided on the outer wall of the inner tube (3); A fixing ring (13) sleeved on the outside of the first clamping ring (6) is fixed on the front side of the door body (1), and mounting seats (15) are fixed on the left and right outer side walls of the fixing ring (13). A sliding cavity (16) corresponding to the through hole (7) is provided inside the mounting seat (15), and a slide plate (17) is slidably connected inside the sliding cavity (16). A plug rod (18) is fixed on the side of the slide plate (17) close to the fixing ring (13), and the plug rod (18) is The other end passes through the mounting seat (15) in a sliding connection manner, passes through the through hole (7) and is inserted into the countersunk hole (12). A pull rod (19) is fixed on the side of the slide plate (17) facing away from the fixing ring (13). The other end of the pull rod (19) passes through the mounting seat (15) in a sliding connection manner and is fixed with a pull block (20). The outer sleeve of the pull rod (19) is provided with a first spring (21) fixed between the slide plate (17) and the cavity wall of the sliding cavity (16).

2. The anti-theft door with a cat's eye according to claim 1, characterized in that: A plurality of first positioning grooves (14) are provided on the inner side wall of the fixing ring (13), and a first positioning block (8) for slidingly inserting into the first positioning groove (14) is fixed on the outer side wall of the first clamping ring (6).

3. The anti-theft door with a cat's eye according to claim 2, characterized in that: A plurality of second positioning grooves (5) are provided on the inner side wall of the outer tube (4), and a second positioning block (9) for slidingly inserting into the second positioning grooves (5) is fixed on the outer side wall of the inner tube (3).

4. The anti-theft door with a cat's eye according to claim 3, characterized in that: An upper fixing seat (22) is integrally formed at the upper end of the outer wall of the fixing ring (13); a front end of the upper fixing seat (22) is rotatably connected to a rotating shaft (26); a first cover plate (31) corresponding to the upper fixing seat (22) is fixed on the rotating shaft (26); and a second cover plate (32) corresponding to the fixing ring (13) is integrally formed at the bottom end of the first cover plate (31).

5. The anti-theft door with a cat's eye according to claim 4, characterized in that: A cavity (24) is defined in the upper fixing seat (22), a torsion spring (25) is installed in the cavity (24), a rear end of the rotating shaft (26) penetrates into the cavity (24) and is fixedly connected to one end of the torsion spring (25), and the other end of the torsion spring (25) is fixedly connected to the cavity wall of the cavity (24).

6. The anti-theft door with a cat's eye according to claim 5, characterized in that: A third cover plate (33) is integrally formed at the bottom end of the second cover plate (32), a connecting hole (34) is provided on the third cover plate (33), a lower fixing seat (23) corresponding to the third cover plate (33) is integrally formed at the lower end of the outer wall of the fixing ring (13), a sliding hole (28) is provided on the front side of the lower fixing seat (23), a connecting rod (29) is slidably connected in the sliding hole (28), a rear end of the connecting rod (29) is located in the sliding hole (28) and a second spring (30) is fixedly connected between the inner bottom wall of the sliding hole (28), and a front end of the connecting rod (29) passes through the connecting hole (34) and is arranged in an arc shape.

7. The anti-theft door with a cat's eye according to claim 6, characterized in that: A limiting plate (27) is fixed on the left outer side wall of the lower fixing seat (23).

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