Lock pin, heaven and earth lock and security door

Abstract

The invention discloses a lock pin, a heaven and earth lock and an anti-theft door, the lock pin comprises: a housing, the housing is provided with a cavity, and the cavity is provided with a bottom wall; the cover body is arranged at one end of the shell in the height direction of the shell and provided with a through hole, and the through hole penetrates through the cover body in the height direction; the guide rod is movably arranged in the cavity in the height direction and is provided with a first part and a second part which are connected in the height direction, the first part is located in the cavity, and one end of the second part penetrates through the through hole; the elastic piece is arranged in the cavity, one end of the elastic piece abuts against the bottom wall, and the other end of the elastic piece is fixedly connected with the first part; the elastic piece has a first position and a second position; at the first position, the elastic piece is in a free state, and the first part abuts against the cover body; at the second position, the elastic piece is in a compressed state, and a gap is formed between the first part and the cover body. The problem that in the prior art, a heaven and earth lock point is clamped with a door frame lock hole due to displacement, and consequently the whole locking system loses efficacy can be solved.

Description

Technical Field

[0001] This invention relates to the field of door lock technology, and in particular to a lock pin, a multi-lock, and a security door. Background Technology

[0002] In a security door locking system, in addition to the main locking points on the sides, there are usually vertical locking points, also known as "top and bottom locking points," at the top and bottom of the door leaf. These top and bottom locking points enhance the vertical fixation of the door leaf to the door frame by locking in the vertical direction, thus improving the overall anti-pry performance.

[0003] Currently, most common locking mechanisms for multi-point locking systems are fixed structures. Their working principle is as follows: the rotation of the lock drives a lever, which in turn extends or retracts the locking pins, thus achieving vertical locking and unlocking. However, existing locking mechanisms exhibit significant flaws in practical use: when the door is improperly installed or subjected to abnormal external forces such as forced opening, the locking pins are prone to displacement, causing misalignment and jamming between the pins and the keyhole on the door frame. Once this jamming occurs, the entire linkage mechanism of the lock will fail, rendering the security door unable to open or close reliably, severely impacting the product's security and reliability.

[0004] Therefore, there is an urgent need for a locking pin, a top and bottom lock, and a security door that can reliably lock and smoothly open when the locking points are misaligned. Summary of the Invention

[0005] The purpose of this invention is to solve the problem in the prior art where the top and bottom locking points become stuck with the door frame lock hole due to misalignment, causing the entire locking system to fail.

[0006] To address the aforementioned technical problems, embodiments of the present invention disclose a locking pin, comprising:

[0007] The outer shell has a cavity, and the cavity has a bottom wall;

[0008] A cover body, located at one end of the outer shell along the height direction, has a through hole that penetrates the cover body along the height direction;

[0009] A guide rod is disposed in the cavity in a manner movable along the height direction, and has a first part and a second part connected along the height direction. The first part is located in the cavity and cannot pass through the through hole. One end of the second part passes through the through hole and extends out of the cavity.

[0010] An elastic element is disposed within the cavity, with one end abutting against the bottom wall and the other end fixedly connected to the first part; the elastic element has a first position and a second position;

[0011] In the first position, the elastic element is in a free state, and the first part abuts against the cover; in the second position, the elastic element is in a compressed state, and there is a gap between the first part and the cover.

[0012] By employing the above technical solution, an elastic element is installed inside the outer casing, allowing the outer casing and guide rod to move relative to each other within the deformation range of the elastic element. The elastic element has two working positions: a first position in a free state and a second position in a compressed state. The state switching directly drives the outer casing to generate axial displacement. On the one hand, the elastic force of the elastic element can automatically reset the locking pin; on the other hand, when the locking pin abuts against the door frame, the retractable locking pin structure can adapt to the installation tolerances or slight deformations of the door frame, avoiding rigid interference and ensuring smooth and reliable locking action.

[0013] In addition, the cover is located at the opening of the outer shell, and the guide rod is located at the through hole, so that a relatively closed space is formed inside the cavity, which avoids the intrusion of external dust, moisture and impurities, and prevents contaminants from affecting the normal operation of elastic parts and moving parts.

[0014] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a locking pin, wherein the cavity has a side wall, and in the first position, a gap g is provided between the elastic member and the side wall, wherein 0 < g ≤ 5 mm.

[0015] By adopting the above technical solution, by setting an appropriate gap between the elastic element and the side wall of the cavity, on the one hand, the necessary deformation space is reserved for the full compression and rebound of the elastic element, avoiding jamming due to the small gap; on the other hand, it also effectively constrains the radial displacement of the elastic element, preventing it from moving excessively in the cavity. Thus, without relying on an additional guide structure, the movement guidance of the elastic element is naturally achieved by utilizing the side wall of the cavity, ensuring that its working process is stable and reliable.

[0016] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a locking pin, wherein the first portion abuts against the side wall.

[0017] By employing the above technical solution, an effective dynamic seal can be formed between the first part of the guide rod and the side wall through tight contact, thereby creating a relatively closed sealed space inside the cavity. This effectively prevents external dust, moisture, and other impurities from entering the cavity, ensuring that the elastic element and moving parts operate in a clean and stable environment, thus improving the long-term reliability and environmental adaptability of the locking pin.

[0018] According to another specific embodiment of the present invention, a locking pin is disclosed, wherein a lubricant is provided in the cavity.

[0019] By using the above technical solution, the frictional resistance and wear between the guide rod and the side wall, as well as the elastic element, are effectively reduced during the movement by filling the cavity of the locking pin with lubricant. This significantly improves the smoothness of the locking pin's movement, the consistency of its response, and the reliability of its long-term use, and also helps to reduce noise and extend the service life of the core moving parts.

[0020] The present invention also discloses a top-and-bottom lock, comprising:

[0021] Locking pin as described in any of the above embodiments;

[0022] Locks;

[0023] A pull rod, one end of which is connected to the lock, and the other end of which is fixedly connected to the second part of the locking pin; the lock is capable of driving the pull rod to move along the height direction;

[0024] Door frame;

[0025] The lock can be driven by the lever to switch the locking pin between a locked position and an unlocked position. In the locked position, the locking pin abuts against the door frame and is in a second position. In the unlocked position, the locking pin is spaced apart from the door frame and is in a first position.

[0026] By adopting the above technical solution, the locking pin is designed as a resilient and telescopic structure, allowing it to adaptively adjust its extension state when locking against the door frame. When the lock extends the locking pin towards the door frame via the pull rod, if the pin fails to achieve a completely stable engagement due to installation deviations or unevenness on the door frame surface, the locking pin can adaptively retract using the compression of the internal elastic element, avoiding rigid interference or jamming with the door frame. This effectively absorbs alignment errors, ensuring that the top and bottom lock can still smoothly and reliably complete the locking action under non-ideal alignment conditions, significantly improving the product's adaptability and operational reliability.

[0027] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a top and bottom lock, wherein the door frame further includes:

[0028] A groove is provided corresponding to the locking pin;

[0029] In the locked position, part of the locking pin is located within the groove and engages with the groove, and the locking pin is in the first position; in the unlocked position, the locking pin is spaced apart from the groove, and the locking pin is in the first position.

[0030] Using the above technical solution, when the locking pin deviates in position as it extends from the door and attempts to enter the corresponding groove in the door frame, or when the lock encounters resistance while extending the pin via the pull rod (i.e., the pin is in direct contact with the door frame and not within the groove), the elastic element inside the locking pin will function. At this time, the outer casing can compress the elastic element under the resistance, causing the guide rod and the locking pin head to adaptively contract. This elastic buffering mechanism avoids damage to the lock mechanism or operational malfunction due to rigid jamming, while ensuring the complete execution of the lock hook's stroke, thus ensuring the security door can be opened and closed normally and reliably throughout its entire service life.

[0031] According to another specific embodiment of the present invention, an embodiment of the present invention discloses a top and bottom lock, which further includes:

[0032] A bushing is disposed within the groove and is interference-fitted with the inner wall of the groove.

[0033] By adopting the above technical solution, the wear resistance and structural strength of the locking contact surface between the lock pin and the door frame are enhanced by setting an interference fit bushing in the groove. This can effectively reduce wear and noise caused by long-term use, improve the smoothness and quietness of the locking action, facilitate replacement and maintenance, and extend the overall service life of the top and bottom lock.

[0034] An embodiment of the present invention also discloses a security door, comprising:

[0035] The top and bottom lock as described in any of the above embodiments;

[0036] The door panel, the lock in the top and bottom lock is located on the door panel, and the locking pin in the top and bottom lock is located inside the door panel. Attached Figure Description

[0037] Figure 1 The front view of the fixing pin is shown in some embodiments;

[0038] Figure 2 Show Figure 1 A cross-sectional view along the AA direction;

[0039] Figure 3 This shows a front view of the locking pin in an embodiment of the present invention;

[0040] Figure 4 Show Figure 3 Sectional view in the middle BB direction Figure 1 ;

[0041] Figure 5 Show Figure 3 Sectional view in the middle BB direction Figure 2 ;

[0042] Figure 6This shows a front view of the cover in an embodiment of the present invention;

[0043] Figure 7 Show Figure 6 A cross-sectional view along the CC direction;

[0044] Figure 8 This diagram shows a cross-sectional view of the locking mechanism in the locking position according to an embodiment of the present invention. Figure 1 ;

[0045] Figure 9 Show Figure 8 Enlarged view of section D in the middle;

[0046] Figure 10 This diagram shows a cross-sectional view of the locking mechanism in the locking position according to an embodiment of the present invention. Figure 2 ;

[0047] Figure 11 Show Figure 10 Enlarged view of section E in the middle;

[0048] Figure 12 A cross-sectional view of the top and bottom lock in the unlocked position is shown in an embodiment of the present invention;

[0049] Figure 13 The front view of the security door in an embodiment of the present invention is shown.

[0050] Figure label:

[0051] Fixed locking pin 100;

[0052] Lock pin 200;

[0053] Outer shell 210; cavity 211; bottom wall 212; side wall 213;

[0054] Cover 220; Through hole 221;

[0055] Guide rod 230; First part 231; Second part 232;

[0056] Elastic element 240;

[0057] Heaven and Earth Lock 300;

[0058] Lock 310;

[0059] Pull rod 320;

[0060] Door frame 330; Recess 331;

[0061] Bushing 340;

[0062] Security door 400;

[0063] Door panel 410. Detailed Implementation

[0064] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention is presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. On the contrary, the purpose of describing the invention in conjunction with embodiments is to cover other options or modifications that may be derived based on the claims of the present invention. To provide a deep understanding of the invention, many specific details will be included in the following description. The invention may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of the invention, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other.

[0065] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0066] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in during use. They 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 orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0067] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0068] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0069] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0070] refer to Figure 1 , Figure 2In some other embodiments, a fixed locking pin 100 is provided, which is a fixed structure. When the door is improperly installed or subjected to abnormal external forces such as forced opening, the position of the locking points is easily displaced, causing the fixed locking pin 100 to misalign and jam with the lock hole on the door frame. Once this jamming occurs, it will directly cause the entire linkage mechanism of the lock to fail, making the security door unable to be opened normally or locked reliably, seriously affecting the security and reliability of the product.

[0071] refer to Figure 3 , Figure 4 To solve the above-mentioned technical problems, this application provides a locking pin 200, including: a housing 210, a cover 220, a guide rod 230, and an elastic element 240. The housing 210 has a cavity 211, which has a bottom wall 212 and a side wall 213. The housing 210 is a cylindrical structure with one end open and is made of stainless steel.

[0072] In some possible embodiments, the shape of the outer casing 210 includes, but is not limited to, a cylinder. It can be a square cylinder, a hexagonal cylinder, an arc-shaped cylinder, or other polygonal cylindrical structures, as long as it has an internal cavity 211 and an opening. The material of the outer casing 210 includes, but is not limited to, stainless steel. It can also be carbon steel, aluminum alloy, engineering plastics, etc., as long as it meets the requirements for strength, corrosion resistance, or lightweight. The embodiments of this application do not limit this.

[0073] refer to Figure 4 , Figure 5 In this embodiment, the cover 220 is along the height direction of the outer shell 210 ( Figure 4 (in the Z direction), located at one end of the outer shell 210, combined with Figure 6 , Figure 7 The cover 220 is provided with a through hole 221, which penetrates the cover 220 along the height direction, making the cavity 211 a semi-closed cavity 211.

[0074] refer to Figure 4 , Figure 5 In this embodiment, the guide rod 230 is movably disposed in the cavity 211 along the height direction. Along the height direction, it has a connected first portion 231 and a second portion 232. The first portion 231 is located in the cavity 211 and cannot pass through the through hole 221. One end of the second portion 232 passes through the through hole 221 and extends outside the cavity 211. The second portion 232 is movable relative to the through hole 221 along the height direction. The first portion 231 is frustum-shaped, and the second portion 232 is cylindrical. The first portion 231 and the second portion 232 are integrally formed.

[0075] In some possible implementations, the shape of the first part 231 includes, but is not limited to, a frustum shape, and can be a cuboid, a cube, an ellipse, etc., as long as it can not pass through the through hole 221 to serve as a limiting function; the shape of the second part 232 includes, but is not limited to, a cylinder shape, and the specific shape can be adapted to the through hole 221. It can be a cuboid, a rhombus, or other polygonal body. The implementation of this application does not limit this.

[0076] In some possible implementations, the first part 231 and the second part 232 are separate structures, as long as the first part 231 and the second part 232 are connected. This application does not limit this implementation.

[0077] refer to Figure 4 , Figure 5 In this embodiment, the first part 231 is spaced apart from the side wall 213 to reduce the friction between the first part 231 and the side wall 213, making the movement of the guide rod 230 smoother.

[0078] In some possible implementations, the first portion 231 abuts against the sidewall 213.

[0079] For example, the first part 231 is made of a material with a certain degree of elasticity, such as rubber, silicone or polyurethane, which uses the elastic deformation of the material itself to help absorb impact or compensate for misalignment, thereby further improving the smoothness and impact resistance of the locking pin 200.

[0080] refer to Figure 4 , Figure 5 In this embodiment, the elastic element 240 is disposed inside the cavity 211, with one end abutting against the bottom wall 212 and the other end fixedly connected to the first part 231. The elastic element 240 is a spring.

[0081] In some possible implementations, the elastic element 240 includes, but is not limited to, a spring, and may be a rubber elastomer, a silicone column, a gas-liquid damping rod, or a shape memory metal element, etc. The embodiments of this application do not limit this.

[0082] refer to Figure 4 , Figure 5 In this embodiment, the elastic member 240 has a first position and a second position; in the first position (e.g. Figure 4 When visible, the elastic element 240 is in a free state, and the first part 231 abuts against the cover 220; in the second position (as seen) Figure 5 When it is visible, the elastic element 240 is in a compressed state, and there is a gap between the first part 231 and the cover 220.

[0083] By incorporating an elastic element 240 within the housing 210, the housing 210 and the guide rod 230 can move relative to each other within the deformation range of the elastic element 240. The elastic element 240 has two working positions: a first position in a free state and a second position in a compressed state. The state switching directly drives the housing 210 to generate axial displacement. On the one hand, the elastic force of the elastic element 240 can automatically reset the locking pin 200; on the other hand, when the locking pin 200 abuts against the door frame 330, the retractable locking pin 200 structure can adapt to the installation tolerances or slight deformations of the door frame 330, avoiding rigid interference and ensuring smooth and reliable locking action.

[0084] refer to Figure 4 , Figure 5 In this embodiment, in the first position, there is a gap g of 1 mm between the elastic member 240 and the side wall 213.

[0085] In some possible implementations, the gap g is not limited to 1 mm, but can be 2 mm, 3 mm, 4 mm, 5 mm, etc., as long as 0 < g ≤ 5 mm. The implementation of this application does not limit this.

[0086] By setting an appropriate gap between the elastic element 240 and the side wall 213 of the cavity 211, necessary deformation space is reserved for the full compression and rebound of the elastic element 240, avoiding jamming due to insufficient gap; on the other hand, the radial displacement of the elastic element 240 is effectively constrained, preventing it from moving excessively in the cavity. Thus, without relying on additional guide structures, the side wall 213 of the cavity 211 naturally guides the movement of the elastic element 240, ensuring stable and reliable operation.

[0087] refer to Figure 4 , Figure 5 In this embodiment, lubricating grease is provided inside the cavity 211.

[0088] In some possible implementations, the lubricant may include, but is not limited to, lubricating grease, and may also be a solid lubricant (such as graphite, molybdenum disulfide powder), a semi-solid lubricant (such as lithium-based grease, complex calcium sulfonate-based grease), or a synthetic lubricant resistant to high and low temperatures, as long as it can effectively reduce friction between moving parts in the cavity 211, reduce wear, and adapt to the working environment temperature and operating conditions of the locking pin 200.

[0089] By filling the cavity 211 of the locking pin 200 with lubricant, the frictional resistance and wear between the guide rod 230 and the side wall 213, as well as the elastic element 240, during the movement are effectively reduced, thereby significantly improving the smoothness of the locking pin 200's movement, the consistency of its response, and the reliability of its long-term use, and also helping to reduce noise and extend the service life of the core moving parts.

[0090] refer to Figure 6 , Figure 7 In this embodiment, the cover 220 is a circular plate structure and is welded to one end of the outer shell 210.

[0091] In some possible embodiments, the shape of the cover 220 includes, but is not limited to, a ring shape, as long as its outer contour matches the shape of the opening end of the outer shell 210, such as a square ring, a polygonal ring, or other closed ring structure. Furthermore, the connection method between the cover 220 and the outer shell 210 includes, but is not limited to, welding, as long as a fixed connection is possible; for example, it can also be adhesive bonding, snap-fitting, interference fit, etc. This application does not limit these aspects.

[0092] refer to Figure 8 , Figure 9 This application also provides a top and bottom lock 300, including: a locking pin 200, a lock 310, a pull rod 320, a door frame 330, and a bushing 340 as described in any of the above embodiments. A key can rotate the lock 310, thereby moving the pull rod 320.

[0093] refer to Figure 8 , Figure 9 In this embodiment, the pull rod 320 has a cylindrical structure, and the top and bottom lock 300 includes two pull rods 320, which are arranged opposite to the lock 310. One end of each pull rod 320 is connected to the lock 310, and the other end is fixedly connected to the second part 232 of the locking pin 200. The lock 310 can drive the pull rod 320 to move in the height direction.

[0094] In some possible implementations, the number of levers 320 may include, but is not limited to, two, one, three, four, five, etc., depending on the locking requirements of the top and bottom locks 300. This application does not limit this implementation.

[0095] refer to Figure 8 , Figure 9 In this embodiment, the door frame 330 also includes a groove 331, which is correspondingly provided with the locking pin 200. The bushing 340 is disposed in the groove 331 and is interference-fitted with the inner wall of the groove 331.

[0096] In some possible implementations, the door frame 330 may not have the groove 331 provided, depending on the actual needs.

[0097] In some possible implementations, the top and bottom lock 300 may not have a bushing 340, depending on the actual needs.

[0098] refer to Figure 8 , Figure 9 , Figure 10 , Figure 11The lock 310 can drive the locking pin 200 to switch between the locked and unlocked positions via the lever 320. Specifically, in the locked position, if the door frame 330 has a groove 331, then in the locked position (… Figure 8 , Figure 9 As can be seen, part of the locking pin 200 is located within the groove 331 and engages with the groove 331, with the locking pin 200 in the first position; if the door frame 330 does not have the groove 331, or the position of the locking pin 200 does not correspond to the position of the groove 331, in the locked position ( Figure 10 , Figure 11 When it is visible, the locking pin 200 abuts against the door frame 330, and the locking pin 200 is in the second position.

[0099] When the locking pin 200 deviates in position as it extends out of the door and attempts to enter the corresponding groove 331 of the door frame 330, or when the lock 310 encounters resistance while driving the locking pin 200 out via the pull rod 320 (i.e., the locking pin 200 is in direct contact with the door frame 330 and not located within the groove 331), the elastic element 240 inside the locking pin 200 will come into play. At this time, the outer casing 210 can compress the elastic element 240 under the action of resistance, causing the guide rod 230 and the head of the locking pin 200 to retract adaptively. This elastic buffering mechanism not only avoids damage to the lock 310 mechanism or malfunction due to rigid jamming, but also ensures the complete execution of the hook stroke of the lock 310, thereby ensuring that the security door 400 can be opened and closed normally and reliably throughout its entire service life.

[0100] refer to Figure 12 In this embodiment, when in the unlocked position, the locking pin 200 is positioned with the door frame 330 and the groove 331, and the locking pin 200 is in the first position.

[0101] refer to Figure 13 This application also provides a security door 400, including: a top and bottom lock 300 as described in any of the above embodiments, and a door panel. The lock 310 of the top and bottom lock 300 is disposed on the door panel, the locking pin 200 of the top and bottom lock 300 is disposed inside the door panel, and the door panel is adapted to the door frame 330.

[0102] While the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the invention to these descriptions. Various changes in form and detail can be made by those skilled in the art, including several simple deductions or substitutions, without departing from the spirit and scope of the invention.

Claims

1. A locking pin, characterized in that, include: The outer shell has a cavity, and the cavity has a bottom wall; A cover body, located at one end of the outer shell along the height direction, has a through hole that penetrates the cover body along the height direction; A guide rod is disposed in the cavity in a manner movable along the height direction, and has a first part and a second part connected along the height direction. The first part is located in the cavity and cannot pass through the through hole. One end of the second part passes through the through hole and extends out of the cavity. An elastic element is disposed within the cavity, with one end abutting against the bottom wall and the other end fixedly connected to the first part; the elastic element has a first position and a second position; In the first position, the elastic element is in a free state, and the first part abuts against the cover; In the second position, the elastic element is in a compressed state, and there is a gap between the first part and the cover.

2. The locking pin as described in claim 1, characterized in that, The cavity has a sidewall, and in the first position, there is a gap g between the elastic element and the sidewall, wherein 0 < g ≤ 5 mm.

3. The locking pin as described in claim 2, characterized in that, The first part abuts against the sidewall.

4. The locking pin as described in claim 1, characterized in that, The cavity contains a lubricant.

5. A type of top-and-bottom lock, characterized in that, include: The locking pin as described in any one of claims 1-4; Locks; A pull rod, one end of which is connected to the lock, and the other end of which is fixedly connected to the second part of the locking pin; the lock is capable of driving the pull rod to move along the height direction; Door frame; The lock can be driven by the lever to switch the locking pin between a locked position and an unlocked position. In the locked position, the locking pin abuts against the door frame and is in a second position. In the unlocked position, the locking pin is spaced apart from the door frame and is in a first position.

6. The top and bottom lock as described in claim 5, characterized in that, The door frame also includes: A groove is provided corresponding to the locking pin; In the locked position, part of the locking pin is located within the groove and engages with the groove, and the locking pin is in the first position; in the unlocked position, the locking pin is spaced apart from the groove, and the locking pin is in the first position.

7. The top and bottom lock as described in claim 6, characterized in that, Also includes: A bushing is disposed within the groove and is interference-fitted with the inner wall of the groove.

8. A security door, characterized in that, include: The top and bottom lock as described in any one of claims 5-7; The door panel, the lock in the top and bottom lock is located on the door panel, and the locking pin in the top and bottom lock is located inside the door panel.

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