Fireproof door lock
By introducing a combustion block and elastic plate mechanism into the fire door lock, the lock tongue is prevented from rotating, which solves the problem of fire door locks being opened by mistake at high temperatures, and achieves safe isolation and convenient operation in high temperature environments.
Patent Information
- Application Number
- CN202422943674.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-10-03
- Estimated Expiration
- 2034-11-29
AI Technical Summary
Existing fireproof door locks may open due to misoperation in high temperature environments, reducing the fire source isolation effect and posing a safety risk.
A fireproof door lock is designed, which includes a lock box, a lock tongue, a limiting hole, a limiting rod, a burning block, a limiting block and an elastic plate. When flame approaches, the burning block burns, and the elastic plate pushes the limiting block to make the limiting rod insert into the lock box to stop the lock tongue from rotating, thereby preventing accidental opening.
It effectively prevents fire doors from opening accidentally at high temperatures, reduces the risk of fire spread, improves safety performance, and enables convenient unlocking and automatic locking through transmission components.
Smart Images
Figure CN223410609U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of door locks, in particular to a fireproof door lock. Background Art
[0002] Fire doors are doors that meet fire resistance, stability, integrity, and thermal insulation requirements for a specific period of time. They are fireproof partitions with a certain degree of fire resistance, installed between fire compartments, evacuation stairwells, vertical shafts, and other structures. They are specifically used to isolate fire sources in buildings and play a vital role in firefighting.
[0003] The door locks used in fire doors in the existing technology are mostly supported by pure metal structures, so that the door locks can last longer in high-temperature combustion environments, reducing the possibility of deformation of the door locks causing deformation of the protective door, and ensuring the effect of fire source isolation.
[0004] In actual use, fire doors should remain open to allow people to escape when the fire source has not burned near the door. However, when the fire source burns to the fire door, the fire door lock still remains in an open state, which may cause the fire door to open due to human error, thereby reducing the isolation effect and posing a certain safety risk. Utility Model Content
[0005] In order to reduce safety risks, the present application provides a fireproof door lock.
[0006] The fireproof door lock provided in this application adopts the following technical solution:
[0007] A fireproof door lock comprises a lock box and a lock tongue rotatably arranged in the lock box, the lock box is provided with a limiting hole, a limiting rod is slidably arranged in the limiting hole, the limiting rod can be inserted into the lock box and abut against the lock tongue, the limiting rod is provided with a combustion block, the combustion block is arranged outside the lock box and abuts against the lock box, the limiting rod is provided with a limiting block abutting against the combustion block, and the lock box is provided with an elastic plate abutting against the limiting block.
[0008] By adopting the above technical solution, the combustion block is made of combustible material. When the fire source burns to the fire door, the combustion block outside the lock box burns, and the limit of the combustion block is lost. The elastic plate recovers and pushes the limit block to move until the limit block is against the outer wall of the lock box. During this process, the limit rod moves in the limit hole and inserts into the lock box to press against the lock tongue. At this time, the lock tongue is blocked and cannot rotate, so that the fire door lock cannot be opened after a period of time after the flame spreads to the fire door, reducing the possibility of people opening the fire door by mistake, ensuring the effect of the fire door isolating the fire source, reducing safety risks, and thus improving safety performance.
[0009] Preferably, the lock box is provided with a mounting bolt, and the mounting bolt is used to mount the elastic plate on the lock tongue.
[0010] By adopting the above technical solution, the installation bolts improve the convenience of installation and removal of the elastic plate, making it convenient to replace the elastic plate when it is worn or in other situations.
[0011] Preferably, the lock box is provided with a rotating rod, the rotating rod is provided with a rotating gear, the rotating gear is provided outside the lock box, the lock tongue is provided on the rotating rod, the rotating rod is provided with a reset member, and the reset member is used to reset the lock tongue.
[0012] By adopting the above technical solution, the rotating gear can be connected to the door handle with the cooperation of other transmission components, so that when the door needs to be opened, the door handle is turned to drive the rotating gear to rotate through the transmission component, thereby driving the rotating rod to rotate and driving the lock tongue to rotate to unlock. When the door handle is released, the reset part resets the lock tongue to lock.
[0013] Preferably, the reset member is a reset torsion spring, which is sleeved on the rotating rod, with one end of the reset torsion spring abutting against the inner wall of the lock box and the other end of the reset torsion spring abutting against the lock tongue.
[0014] By adopting the above technical solution, the lock tongue rotates to compress the torsion spring when the door is opened. When the handle is released, the reset torsion spring restores and pushes the lock tongue to rotate to lock the door lock, thereby achieving automatic reset and locking, simplifying operation and improving convenience of use.
[0015] Preferably, abutment blocks are provided in the lock box, and the abutment blocks can abut against the lock tongue.
[0016] By adopting the above technical solution, the abutment block is used to limit the rotation of the lock tongue, thereby improving the stability of the lock tongue rotation, while reducing the possibility of the lock tongue excessively rotating and colliding with the inner wall of the lock box, thereby improving durability.
[0017] Preferably, the locking tongue is provided with a first abutting groove, the locking tongue is provided with a second abutting groove, one end of the abutting block can be inserted into the first abutting groove, and the other end of the abutting block can be inserted into the second abutting groove.
[0018] By adopting the above technical solution, the abutment block is inserted into the first abutment groove or the second abutment groove, and the inner wall of the first abutment groove or the second abutment groove is limited, so that the possibility of the lock tongue sliding along the axial direction of its own rotating shaft is reduced, thereby improving the stability of the lock tongue and the stability of the door lock switch.
[0019] Preferably, the lock box is provided with a mounting block, the mounting block is inserted into the limiting hole and threadedly connected to the limiting hole, the mounting block is provided with an auxiliary block, the auxiliary block is provided outside the lock box and is against the lock box, the mounting block is provided with a mounting hole, the limiting rod passes through the mounting hole and can slide in the mounting hole, the combustion block is against the auxiliary block, and the limiting block can be against the auxiliary block.
[0020] By adopting the above technical solution, when a problem occurs with the limit rod, the auxiliary block and the mounting block can be removed through the thread, so that the limit rod can be disassembled for repair or replacement.
[0021] Preferably, a card slot is provided on the inner wall of the mounting hole, and a card block is provided on the limiting rod. The card block is inserted into the card slot and can slide in the card slot.
[0022] By adopting the above technical solution, the card block slides in the card slot, thereby improving the sliding stability of the limit rod. At the same time, the locking limit rod reduces the possibility of the limit rod rotating, and improves the stability of the lock tongue locking limit.
[0023] In summary, this application includes at least one of the following beneficial technical effects:
[0024] 1. By arranging a lock box, a lock tongue, a limiting hole, a limiting rod, a combustion block, a limiting block and an elastic plate, when the flame spreads to the door lock, the combustion block will be ignited. After the combustion block is burned out, the elastic plate will deform and restore and push the limiting block, thereby driving the limiting rod to slide in the limiting hole and insert into the lock box to press against the lock tongue, thereby locking the lock tongue and preventing the door from being opened. As a result, after the flame spreads and the fire expands, the fire door is sealed, reducing the possibility of further expanding the fire due to accidental opening of the fire door, thereby reducing safety risks and improving safety performance;
[0025] 2. By providing a rotating rod, rotating gear, and reset torsion spring, when the door handle is turned, the door handle drives the rotating gear on the lock box through a transmission structure such as a gear set or a transmission rod, thereby driving the rotating rod to rotate, and then driving the lock tongue to rotate to unlock. During this process, the reset torsion spring is compressed. When the door handle is released, the reset torsion spring returns to its original position and drives the lock tongue to rotate to achieve automatic locking, improving the convenience of unlocking and locking;
[0026] 3. By setting an abutment block, a first abutment groove and a second abutment groove, the two ends of the abutment block are respectively inserted into the first abutment groove and the second abutment groove in the two states before and after the rotation of the lock tongue, thereby limiting the rotation range of the lock tongue and limiting the sliding of the lock tongue after rotation, thereby improving the stability of the lock tongue rotation and thereby improving the stability of the door lock. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 This is an overall schematic diagram of a fireproof door lock provided in an embodiment of the present application.
[0028] Figure 2 It is a cross-sectional view used to reflect the connection relationship between the rotating shaft and the lock tongue.
[0029] Figure 3 yes Figure 2 Magnified view of area A in center.
[0030] Figure 4 It is a cross-sectional view used to reflect the positional relationship between the abutment block and the lock tongue.
[0031] Explanation of the accompanying drawings: 1. Lock box; 11. Rotating rod; 111. Rotating gear; 112. Reset torsion spring; 12. Abutment block; 13. Limiting hole; 2. Lock tongue; 21. First abutment groove; 22. Second abutment groove; 3. Limiting rod; 31. Block; 32. Limiting block; 33. Burning block; 4. Mounting block; 41. Mounting hole; 42. Auxiliary block; 43. Slot; 5. Elastic plate; 51. Mounting bolt; 52. Opening groove. DETAILED DESCRIPTION
[0032] The following is combined with Figure 1-4 This application is described in further detail.
[0033] The embodiment of the present application discloses a fireproof door lock. Figures 1 to 3 The invention comprises a lock box 1 and a lock tongue 2 rotatably disposed within the lock box 1. The lock tongue 2 can be rotatably extended out of the lock box 1. A through-hole 13 is provided on the side wall of the lock box 1. A mounting block 4 is threadedly inserted into the through-hole 13. The mounting block 4 is cylindrical and has a mounting hole 41 extending therethrough. A limit rod 3 is slidably disposed within the mounting hole 41. The limit rod 3 can be inserted into the lock box 1 and abut against the lock tongue 2. An annular combustion block 33 and an annular limit block 32 are fixedly disposed on the limit rod 3, which abut against each other. The combustion block 33 is made of a combustible material. Both the combustion block 33 and the limit block 32 are disposed outside the lock box 1, with the bottom wall of the combustion block 33 abutting against the outer wall of the lock box 1. The outer wall of the lock box 1 is provided with an elastic plate 5 and a mounting bolt 51. The mounting bolt 51 is used to mount one end of the elastic plate 5 on the lock box 1. The elastic plate 5 is provided with an open slot 52 that is connected to the end wall away from the mounting bolt 51. The limit rod 3 passes through the open slot 52. The elastic plate 5 is in a deformed state and abuts against the top wall of the limit block 32. In another embodiment, a limit rod reset structure can be provided to reopen the door lock. When the fire spreads to the fire door, the combustion block 33 will burn out after a certain period of time. At this time, the elastic plate 5 recovers, pushing the limit block 32 to move, thereby driving the limit rod 3 to move and insert into the lock box 1 to abut against the lock tongue 2, so that the lock tongue 2 cannot rotate, thereby locking the door lock, reducing the possibility of further spreading the fire due to accidental opening of the fire door, improving safety performance, and reducing safety risks.
[0034] In order to improve the stability of the movement of the limit rod 3, refer to Figure 2 and Figure 3 The top wall of the mounting block 4 is integrally fixed with an annular auxiliary block 42. The bottom wall of the auxiliary block 42 abuts against the outer wall of the lock box 1, and the top wall of the auxiliary block 42 abuts against the bottom wall of the combustion block 33. The inner wall of the mounting hole 41 is provided with a slot 43, which extends to the inner wall of the auxiliary block 42. The side wall of the limiting rod 3 is fixed with a block 31, which fits into and can move in the slot 43. When the limiting rod 3 moves, the block 31 moves in the slot 43, thereby improving the stability of the movement of the limiting rod 3, reducing the possibility of the limiting rod 3 rotating, and improving the stability of the lock tongue 2.
[0035] In order to improve the convenience of using door locks, refer to Figure 2 and Figure 4 A rotating rod 11 is rotatably provided inside the lock box 1. A rotating gear 111 is fixedly provided on the rotating rod 11. The rotating gear 111 extends out of the lock box 1. The rotating gear 111 can be connected to the door handle through a transmission structure such as a gear, a transmission rod, and a rack. The transmission structure and the door handle structure are not shown in the figure. The lock tongue 2 is fixedly provided on the rotating rod 11. A return torsion spring 112 is sleeved on the rotating rod 11 as a return member. The two ends of the return torsion spring 112 respectively abut against the internal protrusion of the lock box 1 and the side wall of the lock tongue 2. An abutment block 12 is fixedly provided inside the lock box 1 through a mounting rod. The abutment block 12 is C-shaped. A first abutment groove 21 and a second abutment groove 22 are respectively provided at both ends of the lock tongue 2. The two ends of the abutment block 12 can be inserted into the first abutment groove 21 and the second abutment groove 22 respectively. When the door handle is turned, the transmission gear is driven to rotate through the transmission assembly, thereby driving the rotating rod 11 and the lock tongue 2 to rotate, and during the rotation process, the lock tongue 2 compresses the reset torsion spring 112 to achieve unlocking. When the door handle is released, the reset torsion spring 112 recovers, pushing the lock tongue 2 to rotate and reset to achieve locking. It is simple to operate and easy to use.
[0036] The implementation principle of a fire door lock in an embodiment of the present application is: when the fire spreads to the fire door, the combustion block 33 made of combustible material will be ignited, and the remaining components of the door lock are made of flame-resistant material. The combustion block 33 will burn out after a period of time, and a gap will appear between the limit block 32 and the auxiliary block 42. The elastic plate 5 in the deformed state will recover, thereby pushing the limit block 32 to move against the auxiliary block 42. During this process, the limit rod 3 fixedly connected to the limit block 32 will move together and be inserted into the lock box 1 and against the lock tongue 2, thereby locking the lock tongue 2, so that the lock tongue 2 cannot rotate, thereby locking the door lock and preventing the fire door from being opened, thereby preventing the fire from spreading further, reducing the possibility of further spreading of the fire due to accidental opening of the fire door, reducing safety risks, and improving safety performance.
[0037] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.
Claims
1. A fireproof door lock, characterized by: The invention comprises a lock box (1) and a lock tongue (2) rotatably arranged in the lock box (1); the lock box (1) is provided with a limiting hole (13); a limiting rod (3) is slidably arranged in the limiting hole (13); the limiting rod (3) can be inserted into the lock box (1) and abut against the lock tongue (2); the limiting rod (3) is provided with a combustion block (33); the combustion block (33) is arranged outside the lock box (1) and abuts against the lock box (1); the limiting rod (3) is provided with a limiting block (32) abutting against the combustion block (33); and the lock box (1) is provided with an elastic plate (5) abutting against the limiting block (32).
2. A fireproof door lock according to claim 1, characterized in that: The lock box (1) is provided with a mounting bolt (51), and the mounting bolt (51) is used to mount the elastic plate (5) on the lock tongue (2).
3. A fireproof door lock according to claim 1, characterized in that: The lock box (1) is provided with a rotating rod (11), the rotating rod (11) is provided with a rotating gear (111), the rotating gear (111) is arranged outside the lock box (1), the lock tongue (2) is arranged on the rotating rod (11), the rotating rod (11) is provided with a reset member, and the reset member is used to reset the lock tongue (2).
4. A fireproof door lock according to claim 3, characterized in that: The reset member is a reset torsion spring (112), which is sleeved on the rotating rod (11), one end of the reset torsion spring (112) abuts against the inner wall of the lock box (1), and the other end of the reset torsion spring (112) abuts against the lock tongue (2).
5. The fireproof door lock according to claim 1, characterized in that: An abutment block (12) is provided in the lock box (1), and the abutment block (12) can abut against the lock tongue (2).
6. A fireproof door lock according to claim 5, characterized in that: The locking tongue (2) is provided with a first abutting groove (21), the locking tongue (2) is provided with a second abutting groove (22), one end of the abutting block (12) can be inserted into the first abutting groove (21), and the other end of the abutting block (12) can be inserted into the second abutting groove (22).
7. The fireproof door lock according to claim 1, characterized in that: The lock box (1) is provided with a mounting block (4), the mounting block (4) is inserted into the limiting hole (13) and is threadedly connected to the limiting hole (13), the mounting block (4) is provided with an auxiliary block (42), the auxiliary block (42) is arranged outside the lock box (1) and is against the lock box (1), the mounting block (4) is provided with a mounting hole (41), the limiting rod (3) passes through the mounting hole (41) and can slide in the mounting hole (41), the combustion block (33) is against the auxiliary block (42), and the limiting block (32) can be against the auxiliary block (42).
8. The fireproof door lock according to claim 7, characterized in that: The inner wall of the mounting hole (41) is provided with a card slot (43), and the limiting rod (3) is provided with a card block (31). The card block (31) is inserted into the card slot (43) and can slide in the card slot (43).