Safety lock and fire self-rescue device using same

Abstract

The invention belongs to the field of safety locks, and relates to a safety lock which comprises a lock shell and a bolt body which is transversely and movably arranged, the bolt body can move left and right in the transverse direction, a lock top column is longitudinally arranged in the lock shell and can move up and down in the longitudinal direction, one end of the bolt body extends into the lock shell, a check block is fixedly arranged at the head of the bolt body, and a spring is arranged between the check block and the lock shell. The bolt body penetrates through the hollow part of the inner diameter of the spring, and the bolt body resets under the action of elastic force. A brand new design scheme is adopted, a simple safety lock structure is achieved, the double door can be opened only by pushing the lock top column through a simple tool, and the opening mode is simple, safe and reliable.

Description

Technical Field

[0001] This invention relates to safety locks and fire self-rescue devices using the same safety lock. Background Technology

[0002] Existing single-door locks all utilize the latch and door frame to lock the door. Double-door locks are more difficult to securely lock because double doors are typically double-leaf, meaning the two moving doors cannot lock each other. The solution is to securely lock one door (the fixed door) to the door frame, and then lock the other door (the moving door) to the already locked door. This locking method is more complex, especially when opening the doors. The door handle or lock of the moving door must first be opened, and then the latch of the fixed door must be disengaged from the door frame to fully open both doors.

[0003] The existing double-door opening methods are cumbersome, and in emergency situations, users may fail to open the door due to nervousness.

[0004] Furthermore, the applicant's prior invention patents CN111001102B and CN220276155U are both fire emergency devices. To ensure a safe and sufficient water supply, they are installed on the bathroom ceiling, connected to the indoor water supply system, and include a protective curtain with a relatively large weight (approximately 10-20 kg). To ensure that the curtain automatically droops under gravity after the user opens the door, protecting the user inside, this special application scenario places specific requirements on the door lock: 1. Electrical control is not allowed, as a fire often leads to a power outage, preventing the door from opening. 2. A single-door design is not allowed. To ensure rescue, a large size is required to accommodate at least one person, and sufficient air and heat dissipation space is also needed. A single door would result in an excessively large door panel and a heavy weight, affecting safety. 3. Protruding door handles are not allowed, as they would affect the overall aesthetics of the bathroom. 4. To achieve simple opening, both doors need to be opened simultaneously. 5. The door can be opened easily with simple tools (or common bathroom tools). 6. The double doors have a certain load-bearing capacity and can support the weight of the protective curtain.

[0005] To address the above issues and specific application scenarios, a new technical solution is needed, employing a new type of security lock to achieve simple and quick door opening while maintaining a robust structure. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned defects and provide a safety lock that, by setting a movable locking pin, pushes it out from the vertical direction, causing the bolt to move in the horizontal direction and open the compartment door, thereby solving the problems existing in the background art.

[0007] The objective of this invention is achieved through the following means: A safety lock includes a lock housing and a bolt body that is laterally movable. The bolt body can move left and right laterally. A locking pin is also longitudinally arranged inside the lock housing. The locking pin can move up and down longitudinally. One end of the bolt body extends into the lock housing. A stop block is fixed at its head. A spring is provided between the stop block and the lock housing. The bolt body passes through the hollow part of the inner diameter of the spring. Under the action of the spring force, the bolt body resets.

[0008] Furthermore, the locking pin has a cylindrical structure, and a through hole is provided on the upper surface of the lock housing to form a pin position hole, which provides upward movement space for the locking pin.

[0009] Furthermore, a guide sleeve is provided above the column position hole. The lower end of the guide sleeve is open for locking the top column to move inside it, and the upper end is the top surface.

[0010] Furthermore, there are two bolt bodies, which are symmetrically arranged on the left and right sides, and two corresponding stops are arranged on the bolt bodies respectively, which symmetrically clamp the locking pin on the left and right sides.

[0011] Furthermore, the locking pin is a cylindrical structure, the contact surface of the stop block against the locking pin is concave, and the stop block and the bolt body are fixedly connected by welding or screws, and the bolt body is a cylindrical strip structure.

[0012] Furthermore, the locking pin is a structure of three stepped cylinders along the vertical direction. The diameter of the lower cylinder is larger than that of the middle cylinder, and the diameter of the middle cylinder is larger than that of the upper cylinder. A limiting hole is opened on the top surface of the guide sleeve, which is directly opposite the locking pin. The diameter of the limiting hole is larger than that of the middle cylinder and smaller than that of the lower cylinder.

[0013] Furthermore, a bracket is provided on the upper surface of the lock housing, which is located on the side of the guide sleeve. A latch is provided on the bracket, which is divided into three parts: a latching arm, a support arm, and a rotating shaft. The latching arm and the support arm are fixedly connected to the rotating shaft. The latching arm has a curved structure, and the end of the latching arm forms a hook shape. The included angle between the latching arm and the support arm is an acute angle. The rotating shaft is located on the bracket and is connected to the bracket through the rotating shaft. The rotating shaft can rotate around the rotating shaft. A slot is provided on the side of the guide sleeve, and the support arm is inserted into the slot and can rotate vertically within the slot.

[0014] Furthermore, a lock cylinder is provided above the guide sleeve. The lock cylinder is a circular pressing plate with a circular support post extending downward from the edge of the pressing plate. Correspondingly, a through hole is provided at the top of the guide sleeve for the support post to pass through and press onto the support arm. The locking arm is pressed onto the pressing plate.

[0015] Furthermore, a spring is provided inside the guide sleeve, the upper end of the locking pin is sleeved in the inner diameter of the spring, the lower end of the spring abuts against the lower cylinder, and the upper end of the spring abuts against the inner surface of the top surface.

[0016] A fire self-rescue device includes a top compartment, a protective curtain, and left and right compartment doors. The top compartment is fixed to the ceiling by bolts. The upper end of the protective curtain is hung inside the top compartment, and the lower end of the protective curtain hangs down naturally to the left and right compartment doors. A safety lock is fixedly installed on the left compartment door, and the left compartment door presses against the right compartment door. The bolt body is engaged with the side of the top compartment.

[0017] Furthermore, a lifting component is provided on the top compartment. One end of the lifting component is fixedly installed on the top compartment, and the other end is movably connected to the fastening arm. When the fastening arm rotates, the lifting component and the fastening arm disengage.

[0018] Furthermore, a water spray system is installed inside the top compartment to spray tap water onto the protective curtain. The beneficial effects of this invention are: it adopts a brand-new design scheme and realizes a simple safety lock structure. The double doors can be opened by simply pushing the lock pin with a simple tool. The opening method is simple, safe and reliable. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall unfolding structure of a fire self-rescue device; Figure 2 This is a bottom view of the structure in Embodiment 1; Figure 3 This is a partial structural diagram of Embodiment 1; Figure 4 This is a schematic diagram of the locked state structure of the fire self-rescue device; Figure 5 This is a schematic diagram of the structure installed on the warehouse door in Embodiment 1; Figure 6 This is a schematic diagram of the structure with a protective frame in Embodiment 1; Figure 7 This is an exploded view of Embodiment 1; Figure 8 This is a schematic diagram of the structure of Embodiment 2; Figure 9 This is a cross-sectional structural diagram of Embodiment 1; Figure 10 This is a schematic diagram of Embodiment 1 and the latch; Figure 11This is a schematic diagram of the left top view of Embodiment 1 and the latch structure; Figure 12 This is a schematic diagram of the lock catch, lock pin, and lock cylinder structure; Figure 13 A cross-sectional view of the safety lock. Figure 14 Schematic diagram of the safety lock and lifting mechanism after assembly. Figure 15 Perspective view of a fire self-rescue device including a protective curtain. Figure 16 A perspective view of a fire self-rescue device without a protective curtain. In the diagram, 1. Locking top post, 101. Lower cylinder, 102. Middle cylinder, 103. Upper cylinder, 2. Locking buckle, 201. Locking arm, 202. Support arm, 203. Rotating shaft, 204. Rotating shaft, 3. Lock cylinder, 301. Pressing plate, 302. Supporting post, 4. Lock housing, 401. Post hole, 402. Guide sleeve, 403. Top surface, 404. Limiting hole, 405. Bracket, 406. Slot, 407. Return spring, 5. Bolt body, 501. Stop block, 502. Spring, 6. Fire self-rescue device, 601. Top compartment, 602. Protective curtain, 603. Left compartment door, 604. Right compartment door, 605. Lifting component, 606. Fixing component, 607. Water pipe, 608. Sprinkler pipe, 609. Protective cover. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] The present invention will now be described in further detail with reference to specific implementation examples, but this is not intended to limit the present invention.

[0022] To facilitate understanding of the structural design of the safety lock in this invention, its application scenarios will be introduced first.

[0023] refer to Figure 1This safety lock is primarily used in the applicant's previously designed fire self-rescue device 6. Normally, it locks the fire self-rescue device 6. In the event of a fire, it activates the fire self-rescue device 6 to isolate personnel from the fire scene, thus protecting them. The fire self-rescue device 6 is installed in a bathroom, as this location has ample water supply and is generally situated on the edge of the room. Its basic working principle is as follows: In the event of a fire, personnel enter the bathroom, close the bathroom door, and use a specially provided tool, or a common bathroom tool such as a toilet brush, toothbrush, or mop head (or other small, cylindrical object), to pry open the safety lock. Once the safety lock is opened, the double doors of the fire self-rescue device 6 open, and the protective curtain 602 suspended inside hangs down naturally under gravity, pulling the personnel into the center of the curtain 602, isolating them from the high temperature of the fire scene, allowing them to await rescue by firefighters.

[0024] In such special applications, the safety locks also have specific requirements to adapt to the application environment.

[0025] Firstly, the safety lock cannot be electrically controlled because the indoor power supply may fail during a fire, which could prevent the door of the fire self-rescue device 6 from opening, thus causing a serious accident.

[0026] Secondly, the safety lock must be easy to open and can be opened in one go, because the fire self-rescue device 6 is suspended from the ceiling at a considerable height. If the opening is complicated and involves multiple steps, it will pose a risk. In an emergency, on-site personnel are in a state of high tension and fear. A complicated opening procedure will lead to opening failure.

[0027] The safety lock should be opened using a variety of tools. Using specialized tools could lead to loss or other problems, preventing the timely activation of the fire self-rescue device in an emergency. Therefore, this safety lock should be able to be opened using various readily available tools in the bathroom, such as toilet brushes, toothbrushes, mop heads, and other small cylindrical objects, thus ensuring safety.

[0028] The safety lock should be positioned in the middle of the double doors of the fire self-rescue device 6. When a person stands in the middle of the fire self-rescue device 6 and opens the safety lock, the double doors open simultaneously, and the protective curtain 602 hangs down naturally, directly covering the person inside, achieving a quick protection purpose.

[0029] Because the fire self-rescue device 6 is an emergency device, similar to an airbag in a car, it only has value in an emergency and will not have any effect in normal conditions. Therefore, the corresponding safety lock and fire self-rescue device 6 are installed inside the bathroom and cannot affect the aesthetic design of the bathroom. Therefore, the corresponding appearance and structure must adopt a non-protruding design.

[0030] Based on the above premises, the safety lock of this invention requires special design to meet the requirements. Example 1, see reference. Figure 2 , Figure 3 The safety lock includes a lock housing 4 and two laterally movable bolts 5, which are positioned opposite each other and can move left and right laterally. Inside the lock housing 4, a locking pin 1 is longitudinally positioned and can move up and down longitudinally. One end of each bolt 5 extends into the lock housing 4, and a stop 501 is fixed to its head. A spring 502 is located between the stop 501 and the lock housing 4. The bolt passes through the hollow portion of the spring's inner diameter, and under the action of the spring force, the bolt 5 returns to its original position. The two stops 501 clamp the locking pin 1. The lock housing 4 has a concave cavity structure with through holes on both sides for the bolts 5 to pass through. The lock housing 4 is directly connected to the door by welding or screw fixing.

[0031] refer to Figure 3 4, 5, 6, 7. The working principle of this safety lock is as follows: In the initial state, due to the presence of the locking pin 1, the two bolts 5 are constrained in their initial positions. When a cylindrical object is used to push the circular locking pin 1 upwards, after the locking pin 1 disengages from the middle of the two stops 501, the presence of the spring 502 will compress the stops 501 to move towards the center, thereby driving the bolts 5 to move towards the center, thus realizing the opening of the compartment door. In this embodiment 1, the locking pin 1 adopts a circular structure, but it is not limited to a circle; it can also adopt other structures such as square or elliptical. The shape of the corresponding stops 501 can also correspond to the shape of the locking pin 1. The main function of the stops 501 is to cooperate with the locking pin 1 over a large area to form good friction and provide good support. At the same time, it compresses the spring 502 to ensure that the bolts 5 can move in the horizontal direction. In this embodiment, the locking pin 1 is a stepped cylindrical structure. Alternatively, the locking pin 1 can be a basic cylinder, directly clamped by two stops 501. This also forms a stable locking structure. When the locking pin 1 is pushed upward, its body is inside or outside the lock housing 4.

[0032] Example 2 is a single-sided structure (see reference). Figure 8 That is, based on Example 1, a single-sided bolt 5 structure is adopted. Although this structure is not as stable as the double-sided structure, it can still achieve the basic locking purpose.

[0033] refer to Figure 9To ensure the controllable trajectory of the locking pin 1 when it is pushed upward, a pin hole 401 is provided at the top of the lock housing 4 to provide sufficient space for the locking pin 1 to move upward. A guide sleeve 402 is provided directly above the pin hole 401. The lower end of the guide sleeve 402 is an open structure, which is directly opposite the pin hole 401, so that the locking pin 1 can move inside the guide sleeve 402 under the guidance of the side wall of the guide sleeve 402 from the lower end of the lock housing. The locking pin 1 adopts a stepped columnar structure, which is divided into a lower cylinder 101, a middle cylinder 102, and an upper cylinder 103. The diameter of the three cylinders gradually decreases. A limit hole 404 is provided above the top surface 403 of the guide sleeve 402 to limit the stroke of the locking pin 1. When the locking pin 1 is pushed upward, it will move upward under the constraint of the guide sleeve 402 and the limiting hole 404. Because the diameter of the limiting hole 404 is larger than the diameter of the middle cylinder 102 and the upper cylinder 103, and smaller than the diameter of the lower cylinder 101, it ensures that the locking pin 1 will not detach from the guide sleeve 402.

[0034] Because a protective curtain 602 is installed in the fire self-rescue device, the technical solution adopted to quickly obtain protection in an emergency is to let the protective curtain 602 fall naturally after the double doors are opened, and to put personnel in the middle of the protective curtain 602, which is safer and more reliable. However, this design has a drawback: the protective curtain 602 is relatively heavy, generally around 10-20KG. This will cause the double doors to bear a large downward pressure. The safety lock is installed on the left compartment door 603 of the double doors, and the bolt 5 is engaged with the side wall of the fire self-rescue device 6 to achieve the locking purpose. However, in this state, the friction force will be too large (F=μN). The magnitude of the friction force F depends on the coefficient of friction μ and the vertical pressure N. Therefore, the greater the pressure, the greater the friction force. This leads to a possibility that even if the locking pin 1 is pushed upward and disengaged from the stop block 501, if the elastic force of the spring 502 is less than the friction force F, the bolt 5 cannot be moved and will not move towards the center, thus preventing the door from opening. To solve this problem, a structure needs to be designed to lift the double doors upwards, thereby addressing the issue of excessive pressure (i.e., reducing N). The goal is to reduce friction by pulling the double doors vertically while they are locked, but once the locking pin 1 is opened, the upward pulling force will disappear, allowing the protective curtain 6 to hang down naturally and achieve its protective purpose.

[0035] Based on the above requirements, and referring to Figure 10 , Figure 11 , Figure 12 , Figure 13Furthermore, a bracket 405, a latch 2, and a lock cylinder 3 are designed on the lock housing 4. The bracket 405 is positioned above the lock housing 4 and to the side of the guide sleeve 402. The latch 2 is mounted on the bracket 405 and consists of three main parts: a latching arm 201, a support arm 202, and a rotating shaft 203. The angle between the latching arm 201 and the support arm 202 is acute. The support arm 202 is parallel to the upper surface of the lock housing 4. The guide sleeve 402 has a slot 406 facing the bracket 405. The support arm 202 is inserted into the slot 406 and contacts the upper end of the lower cylinder 101. When the lower cylinder 101 moves upward, it drives the support arm 202 to move. The rotating shaft 203 is connected to the bracket 405 via a rotating shaft 204, and the latch 2 rotates around the rotating shaft 204. The lock cylinder 3 consists of a pressing plate 301 and a support post 302. The pressing plate 301 is a circular sheet structure, which is welded to the upper cylinder 103. The upper end of the support post 302 is fixedly connected to the lower end face of the pressing plate 301, which can be formed by welding or screw connection. The lower end of the support post 302 is pressed onto the upper part of the support arm 202.

[0036] refer to Figure 14 , Figure 15 , Figure 16 By setting a hook-shaped structure, one end of the hook-shaped structure is fixedly connected to the top wall inside the top compartment 601 of the fire self-rescue device 6, and the other end of the hook-shaped structure is hung on the fastening arm 201. Because the fastening arm 201 is connected through the bracket 406, and the bracket 406 is fixedly connected to the lock housing 4, and the lock housing 4 is also fixedly connected to the compartment door, when the compartment door is subjected to the weight of the protective curtain 602, it will be transmitted to the lock housing 4, the bracket 406 and the fastening arm 201, and then transmitted to the top compartment 601 through the hook-shaped structure. In this way, the weight of the protective curtain 602 and the compartment door will be shared by the top compartment 601, instead of being entirely borne by the bolt body 5, thereby reducing the pressure on the bolt body 5, reducing the friction of the bolt body 5, and ensuring smooth opening.

[0037] In this embodiment, reference Figure 14 For aesthetic and safety purposes, a square cylindrical lifting component 605 is designed. The upper end of the lifting component 605 is provided with a fixing component 606, which is fixedly connected to the inner top wall of the top compartment 601 by screws. The lower end of the lifting component 605 is an open structure, which is fitted around the guide sleeve 402. There is a groove on the side wall of the lifting component 605, through which the fastening arm 201 passes and presses against the pressing plate 301.

[0038] The operating principle of the above structure is as follows: when the lower cylinder 101 of the locking top post 1 is pushed upward, the locking top post 1 moves upward, and the upper end of the lower cylinder 101 contacts the support arm 202, causing the support arm 202 to rotate. This, in turn, drives the support post 302 upward, causing the pressing plate 301 to move upward. Because the fastening arm 201 is fastened to the pressing plate 301, when the pressing plate 301 moves upward, it pushes the fastening arm 201 to rotate upward, thereby disengaging the fastening arm 201 from the hook-shaped structure (or the lifting component 605), completely releasing the protective curtain 602. Thus, when the door is opened, the door and the lifting component 605 completely disengage, and the protective curtain 602, under the action of gravity, covers the personnel downward. This structure ensures that when the door is closed, the weight of the protective curtain 602 and the door is borne by the top compartment 601. When opened, the door and the protective curtain 602 are naturally released.

[0039] refer to Figure 12 13. To facilitate later maintenance, a return spring 407 is provided inside the guide sleeve 402. The upper end of the return spring 407 contacts the top surface 403, and the lower end contacts the lower cylinder 101. When the locking pin 1 is pushed into the guide sleeve 402, the return spring 407 is compressed, and the double door is opened. To close the double door again, the stop block 501 is separated using tension clamps or a tension tool. Under the elastic force of the return spring 407, the locking pin 1 moves downward to return to its initial position. After releasing the tension tool, the stop block 501 clamps the locking pin 1 again, achieving relocking.

[0040] Fire self-rescue device 6 with safety lock, see reference. Figure 4 , Figure 15The self-rescue device includes a top compartment 601 with a stainless steel frame structure, a protective curtain 602, and a lifting component 605. The top compartment 601 is a square frame structure with an opening at the bottom. The fixing component 606 on the top compartment 601 is fixed to the ceiling with screws, and the water pipe 607 at the top of the top compartment is connected to the indoor water supply system. The upper end of the protective curtain 602 is fixed to the top of the inner side of the top compartment 601 with screws, and the lower end of the protective curtain 602 hangs down naturally to the double door panel. The protective curtain 602 is made of high silica cloth, and a water spray pipe 608 is arranged around the protective curtain 602. The lower opening of the top compartment 601 is provided with double doors, namely the left compartment door 603 and the right compartment door 604, which are movably connected to the top compartment 601 by hinges. In this embodiment, the safety lock is installed on the left compartment door 603 (it can also be installed on the right compartment door 604, and there are no special requirements for fixing). At the contact edge of the left compartment door 603 and the right compartment door 604, the left compartment door 603 protrudes outward and the right compartment door 604 is concave inward. In this way, when locked, the left compartment door 603 locks the right compartment door 604, so that the double doors cannot be opened. Above the safety lock is a protective cover 609, which is arc-shaped and fixedly installed on the left compartment door 603. This cover conceals the safety lock, preventing it from obstructing the descent of the protective curtain 602. The water spray pipe 608 and the water inlet pipe 607 are connected and controlled by a water valve. The water valve can be switched on and off via a linkage device (such as a steel wire rope) connected to the double door or the lower end of the protective curtain 602. Under gravity, the water valve rotates, thus opening it.

[0041] In an emergency, evacuees enter the bathroom and stand directly beneath the fire self-rescue device 6. Using tools, they press down on the locking post 1 of the left compartment door 603, opening the double doors. The internal protective curtain 602 naturally falls, encasing the evacuees in the space at its center. Simultaneously, the water valve between the sprinkler pipe 608 and the water inlet pipe 607 is opened by a linkage mechanism, and the sprinkler pipe 608 begins spraying water onto the protective curtain 602 to maintain its low temperature and prevent damage from fire. This protects the evacuees until firefighters arrive.

[0042] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the inventive concept, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A safety lock, characterized in that: It includes a lock case and a bolt that is laterally movable. The bolt can move left and right laterally. Inside the lock case, there is also a locking pin that is longitudinally movable up and down. One end of the bolt extends into the lock case, and a stop is fixed at its head. A spring is provided between the stop and the lock case. The bolt passes through the hollow part of the inner diameter of the spring. Under the action of the spring force, the bolt resets.

2. The safety lock according to claim 1, characterized in that: The locking pin has a cylindrical structure, and a through hole is provided on the upper surface of the lock housing to form a pin position hole, which provides space for the locking pin to move upward.

3. The safety lock according to claim 2, characterized in that: A guide sleeve is provided above the column position hole. The lower end of the guide sleeve is open for the locking column to move inside it, and the upper end is the top surface.

4. The safety lock according to claim 2, characterized in that: There are two bolts, which are symmetrically arranged on the left and right sides. There are two corresponding stops, which are respectively arranged on the bolts to clamp the locking pins symmetrically on the left and right sides.

5. The safety lock according to claim 4, characterized in that: The locking pin is a cylindrical structure, and the contact surface of the stop block against the locking pin is concave. The stop block and the bolt body are fixedly connected by welding or screws, and the bolt body is a cylindrical strip structure.

6. The security lock according to claim 3, characterized in that: The locking pin is a structure of three stepped cylinders along the vertical direction. The diameter of the lower cylinder is larger than that of the middle cylinder, and the diameter of the middle cylinder is larger than that of the upper cylinder. A limiting hole is opened on the top surface of the guide sleeve, which is directly opposite the locking pin. The diameter of the limiting hole is larger than that of the middle cylinder and smaller than that of the lower cylinder.

7. The safety lock according to claim 6, characterized in that: A bracket is provided on the upper surface of the lock housing, and the bracket is located on the side of the guide sleeve. A latch is provided on the bracket, which is divided into three parts: a latching arm, a support arm, and a rotating shaft. The latching arm and the support arm are fixedly connected to the rotating shaft. The latching arm has a curved structure, and the end of the latching arm forms a hook shape. The included angle between the latching arm and the support arm is an acute angle. The rotating shaft is located on the bracket and is connected to the bracket through the rotating shaft. The rotating shaft can rotate around the rotating shaft. A slot is provided on the side of the guide sleeve. The support arm is inserted into the slot and can rotate vertically within the slot.

8. The security lock according to claim 7, characterized in that: A lock cylinder is provided above the guide sleeve. The lock cylinder is a circular pressing plate. A circular support post extends downward from the edge of the pressing plate. Correspondingly, a through hole is provided at the top of the guide sleeve for the support post to pass through and press onto the support arm. The locking arm is pressed onto the pressing plate.

9. The security lock according to claim 8, characterized in that: A spring is installed inside the guide sleeve. The upper end of the locking pin is fitted inside the inner diameter of the spring. The lower end of the spring abuts against the lower cylinder, and the upper end of the spring abuts against the inner surface of the top surface.

10. A fire self-rescue device using the safety lock as described in any one of claims 1-9, characterized in that: It includes a top compartment, a protective curtain, and left and right compartment doors. The top compartment is fixed to the ceiling with bolts. The upper end of the protective curtain is hung inside the top compartment, and the lower end of the protective curtain hangs down naturally to the left and right compartment doors. The safety lock is fixed to the left compartment door, and the left compartment door presses against the right compartment door, with the bolt body locking into the side of the top compartment.

11. The fire self-rescue device as described in claim 10, characterized in that: A lifting component is installed on the top compartment. One end of the lifting component is fixedly installed on the top compartment, and the other end is movably connected to the fastening arm. When the fastening arm rotates, the lifting component and the fastening arm disengage.

12. The fire self-rescue device as described in claim 11, characterized in that: The top compartment is also equipped with a water spraying device for spraying tap water onto the protective curtain.

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