Multi-mode locking device for explosion-proof anti-rebound door
By designing a multi-mode locking device, the explosion-proof and anti-rebound door can switch between multiple states by using a handle to control the linkage gear and connecting rod. This solves the problem of single function in the existing technology, realizes the effect of opening and closing the explosion-proof and anti-rebound door at any time, and improves the convenience and safety of operation.
Patent Information
- Application Number
- CN202423131706.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-11-14
- Estimated Expiration
- 2034-12-18
AI Technical Summary
The existing locking devices of explosion-proof and anti-rebound doors only have two states: peacetime and wartime. They are single-function and cannot be opened and closed at will, resulting in poor practical effect.
A multi-mode locking device for explosion-proof and anti-rebound doors was designed, including an upper locking assembly, a main locking assembly, and a lower locking assembly. The device enables rapid switching between three states: normal operation, temporary emergency use, and wartime operation, through a handle-controlled linkage gear and connecting rod. A gear and rack transmission structure is adopted to reduce the opening force.
It achieves multi-mode locking of explosion-proof and anti-rebound doors, is simple and convenient to operate, has a wide range of applications, and can be opened and closed at will like a household security door, improving safety and convenience.
Smart Images
Figure CN223549092U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of locking devices for explosion-proof doors, specifically to a multi-mode locking device for explosion-proof and anti-rebound doors. Background Technology
[0002] Explosion-proof and anti-rebound doors are an important component of underground civil defense projects. When closed, they allow both sides to open independently. A locking device is used to secure the door when closed. This device can withstand the enormous impact of an explosion, preventing the door from being damaged or accidentally opened, thus effectively isolating the blast zone and protecting personnel, equipment, and the area behind the door. Furthermore, when the door is subjected to external impact, the locking device effectively prevents excessive rebound, maintaining the door's original closed and locked state, ensuring the airtightness and security of the premises. Currently, most locking devices on the market only offer two states: either unlocked or completely locked. Their function is relatively limited, unlike household security doors which allow for easy opening and closing, resulting in poor practicality. Utility Model Content
[0003] The purpose of this utility model is to provide a multi-mode locking device for explosion-proof and anti-rebound doors. This device can quickly switch between multiple locking states, is simple and convenient to operate, and can achieve the effect of opening and closing at any time, just like a household security door. The whole device adopts a linkage operation mode, which is not easy to make mistakes and has a wide range of applications.
[0004] To achieve the above objectives, the present invention adopts the following technical solution:
[0005] A multi-mode locking device for explosion-proof and anti-rebound doors includes an upper locking assembly, a main locking assembly, and a lower locking assembly arranged vertically at intervals. A handle for changing the state of the main locking assembly is installed on the main locking assembly. The upper locking assembly is connected to the main locking assembly via a first connecting rod. When the handle is rotated, the upper locking assembly changes its state through the first connecting rod. The lower locking assembly is connected to the main locking assembly via a second connecting rod. When the handle is rotated, the lower locking assembly changes its state through the second connecting rod.
[0006] Preferably, the main locking assembly includes a first locking seat mounted on the door leaf, a first locking cover detachably mounted on the first locking seat, a through-shaft rotatably mounted on the first locking seat, a first gear fixedly mounted on the through-shaft, a first active lock head horizontally slidably mounted on the first locking seat, a first linkage rod vertically slidably mounted on the first locking seat, and a normally open lock head elastically slidably mounted on the first locking seat. Both the first active lock head and the first linkage rod are provided with racks that mesh with the first gear.
[0007] Preferably, a push rod is fixedly installed on the top of one end of the first active lock head, and a limiting rod is fixedly installed on the bottom of one end of the normally open lock head. When the upper locking assembly, the main locking assembly, and the lower locking assembly are all in the closed state, the push rod is in contact with the limiting rod.
[0008] Preferably, a spring is installed between the normally open lock head and the end of the first locking seat, the spring allowing the normally open lock head to extend to the outside of the first locking seat.
[0009] Preferably, the upper locking assembly has the same structure as the lower locking assembly, including a second locking seat mounted on the door leaf, a second locking cover detachably mounted on the second locking seat, a second gear rotatably mounted on the second locking seat, a second active lock head and a second passive lock head horizontally slidably mounted on the second locking seat, and a second linkage rod vertically slidably mounted on the second locking seat. Both the second active lock head and the second linkage rod are provided with racks that mesh with the second gear.
[0010] Preferably, the second active lock head and the second passive lock head are fixedly connected by a connecting rod.
[0011] Preferably, the second linkage rod is connected to the first linkage rod via the first connecting rod or the second connecting rod.
[0012] Preferably, a decorative cover is provided on the outside of the upper locking assembly, the main locking assembly and the lower locking assembly.
[0013] Preferably, the end of the normally open lock head is provided with an arc-shaped latch or a zigzag latch.
[0014] In this invention, the upper locking assembly, main locking assembly, and lower locking assembly can achieve three states of overall locking under normal conditions, individual locking for emergency use, and overall locking under wartime conditions, controlled by a handle. Only one handle is needed to switch between these multiple locking modes, making operation simple and error-free. The use of a rack and pinion transmission structure allows the upper, main, and lower locking assemblies to work in tandem, resulting in lower opening force and greater ease of use, significantly reducing the strength required from the operator and broadening its applicability. The decorative cover enhances the overall aesthetics and simplicity. Attached Figure Description
[0015] Figure 1 This is a partial structural diagram of the door leaf in its normal state according to this utility model;
[0016] Figure 2 This is a schematic diagram of the overall structure of the door leaf in its normal state.
[0017] Figure 3This is a partial structural diagram of the door leaf in a temporary emergency use state according to this utility model;
[0018] Figure 4 This is a schematic diagram of the overall structure of the door leaf in the temporary emergency use state of this utility model;
[0019] Figure 5 This is a partial structural diagram of the door leaf of this utility model in wartime.
[0020] Figure 6 This is a schematic diagram of the overall structure of the door leaf in wartime of this utility model;
[0021] Figure 7 This is a schematic diagram of the first locking seat structure of this utility model;
[0022] Figure 8 This is a schematic diagram of the first locking cover structure of this utility model;
[0023] Figure 9 This is a schematic diagram of the overall structure of this utility model in its installation state;
[0024] Figure 10 This is a partial cross-sectional schematic diagram of the present invention;
[0025] In the diagram: 1. Upper locking assembly; 2. Main locking assembly; 3. Lower locking assembly; 4. Handle; 5. First connecting rod; 6. Second connecting rod; 7. Door leaf; 8. Decorative cover; 10. Second locking seat; 11. Second locking cover; 12. Second gear; 13. Second active lock head; 14. Second passive lock head; 15. Second linkage rod; 16. Connecting rod; 20. First locking seat; 21. First locking cover; 22. Through-door shaft; 23. First gear; 24. First active lock head; 25. First linkage rod; 26. Normally open lock head; 27. Push rod; 28. Limiting rod; 29. Spring. Detailed Implementation
[0026] The present invention will be further described below with reference to the accompanying drawings:
[0027] like Figures 1-10The multi-mode locking device for explosion-proof and anti-rebound doors shown includes an upper locking assembly 1, a main locking assembly 2, and a lower locking assembly 3 arranged vertically at intervals. A handle 4 for changing the state of the main locking assembly 2 is installed on the main locking assembly 2. The upper locking assembly 1 is connected to the main locking assembly 2 via a first connecting rod 5. When the operator controls the handle 4 to rotate, the first connecting rod 5 causes the upper locking assembly 1 to change its state. The lower locking assembly 3 is connected to the main locking assembly 2 via a second connecting rod 6. When the operator controls the handle 4 to rotate, the second connecting rod 6 causes the lower locking assembly 3 to change its state. Decorative covers 8 are provided on the outside of the upper locking assembly 1, main locking assembly 2, and lower locking assembly 3. The decorative covers 8 make the locking device more aesthetically pleasing and simple. The handle 4 is located outside the decorative covers 8, facilitating the operator's control of the opening and closing of the locking device.
[0028] The main locking assembly 2 includes a first locking seat 20 fixedly mounted on the door leaf 7 by rivets, a first locking cover 21 detachably mounted on the first locking seat 20 by bolts, a through-shaft 22 rotatably mounted on the first locking seat 20 by bearings, a first gear 23 fixedly mounted on the through-shaft 22, a first active lock head 24 horizontally slidably mounted on the first locking seat 20, a first linkage rod 25 vertically slidably mounted on the first locking seat 20, and a normally open lock head 26 elastically slidably mounted on the first locking seat 20. Both the first active lock head 24 and the first linkage rod 25 are provided with racks that mesh with the first gear 23. When the first gear 23 rotates, the racks can drive the first active lock head 24 to slide horizontally and the first linkage rod 25 to slide vertically. A handle 4 is fixedly mounted on the through-shaft 22. The operator controls the rotation of the through-shaft 22 by rotating the handle 4, thereby controlling the rotation of the first gear 23. When the first locking cover 21 is installed on the first locking seat 20, there are two locking channels between them. The first active locking head 24 and the normally open locking head 26 are located in one locking channel and slide horizontally within it.
[0029] A push rod 27 is fixedly installed on the top of one end of the first active lock head 24, and a limit rod 28 is fixedly installed on the bottom of one end of the normally open lock head 26. When the upper locking assembly 1, the main locking assembly 2, and the lower locking assembly 3 are all in the closed state, the push rod 27 contacts the limit rod 28, causing the normally open lock head 26 to be hidden inside the first locking seat 20. A spring 29 is installed between the ends of the normally open lock head 26 and the first locking seat 20. Without the restriction of the push rod 27, the spring 29 allows one end of the normally open lock head 26 to extend to the outside of the first locking seat 20. The end of the normally open lock head 26 is provided with an arc-shaped latch or a zigzag latch; in this embodiment, an arc-shaped latch is preferred.
[0030] The upper locking assembly 1 and the lower locking assembly 3 have the same structure, both including a second locking seat 10 fixedly mounted on the door leaf 7 by rivets, a second locking cover 11 detachably mounted on the second locking seat 10 by fasteners, a second gear 12 rotatably mounted on the second locking seat 10 by a pin, a second active lock head 13 and a second passive lock head 14 horizontally slidably mounted on the second locking seat 10, and a second linkage rod 15 vertically slidably mounted on the second locking seat 10. Both the second active lock head 13 and the second linkage rod 15 are provided with racks that mesh with the second gear 12. The second active lock head 13 and the second passive lock head 14 are fixedly connected by a connecting rod 16, and both slide synchronously to ensure identical posture. The second linkage rod 15 is connected to the first linkage rod 25 by a first connecting rod 5 or a second connecting rod 6. When the second locking cover 11 is mounted on the second locking seat 10, there are two locking channels between them, with the second active lock head 13 and the second passive lock head 14 each located within one channel and sliding horizontally within it.
[0031] The locking device disclosed in this specification has three working states. The first is the normal state, in which all the first active lock head 24, normally open lock head 26, second active lock head 13 and second passive lock head 14 are in the closed state, that is, retracted into the first locking seat 20 or the second locking seat 10, and the door is in the open state.
[0032] The specific operation is as follows: Rotate the handle 4 clockwise upwards to the end, causing the first active lock head 24 to retract, and the push rod 27 on it pushes the normally open lock head 26 to retract through the limit rod 28, thus realizing the complete retraction of the first active lock head 24 and the normally open lock head 26; the handle 4 drives the first gear 23, and the first gear 23 drives the first linkage rod 25 to move upwards through the rack, and the first linkage rod 25 drives the second gear 12 in the upper locking assembly 1 and the lower locking assembly 3 to rotate clockwise through the first connecting rod 5 and the second connecting rod 6, thereby driving the second active lock head 13 and the second passive lock head 14 to retract completely.
[0033] Secondly, in the temporary emergency use state, rotating the handle 4 opens only the normally open lock 26, while the other first active lock 24, second active lock 13, and second passive lock 14 remain closed. In this state, the door can be opened like a home door or security door by rotating the handle 4 to open the normally open lock 26, enabling the door to be opened at any time. When closing the door, the normally open lock 26 will automatically open, making the door tightly closed without the need to rotate the handle 4, making the operation simple and convenient.
[0034] The specific operation is as follows: Rotate the handle 4 counterclockwise downwards, causing the first active lock head 24 to push the push rod 27 forward. The space released by the push rod 27 allows the limit rod 28 and the normally open lock head 26 to extend freely, thereby opening the normally open lock head 26. At this time, the first active lock head 24, the second active lock head 13, and the second passive lock head 14 are all in the closed state. Meanwhile, the handle 4 drives the first gear 23, which drives the first linkage rod 25 downwards through the rack. The first linkage rod 25 then drives the second gear 12 in the upper locking assembly 1 and the lower locking assembly 3 to rotate counterclockwise through the first connecting rod 5 and the second connecting rod 6, thereby causing the second active lock head 13 in the upper locking assembly 1 and the lower locking assembly 3 to be appropriately released. At the same time, the second passive lock head 14 is released along with it through the connecting rod 16.
[0035] Thirdly, in wartime mode, rotating handle 4 causes the first active lock 24, normally open lock 26, second active lock 13, and second passive lock 14 to all be in the open state.
[0036] The specific operation is as follows: Rotate handle 4 counterclockwise downwards to the end, causing the first active lock head 24 to open; handle 4 drives the first gear 23, which in turn drives the first linkage rod 25 downwards via a rack. The first linkage rod 25 then drives the second gear 12 in the upper locking assembly 1 and the lower locking assembly 3 to rotate counterclockwise via the first connecting rod 5 and the second connecting rod 6. Consequently, the second active lock heads 13 of the upper locking assembly 1 and the lower locking assembly 3 gradually extend, and at the same time, the second passive lock head 14 opens along with it via the connecting rod 16. To open the door, rotate handle 4 clockwise.
[0037] The above embodiments are merely illustrative of the concept and implementation of this utility model, and are not intended to limit it. Under the concept of this utility model, the technical solutions without substantial changes are still within the scope of protection.
Claims
1. A multi-mode locking device for explosion-proof and anti-rebound doors, characterized in that: The device includes an upper locking assembly (1), a main locking assembly (2), and a lower locking assembly (3) arranged vertically at intervals. A handle (4) for changing the state of the main locking assembly (2) is installed on the main locking assembly (2). The upper locking assembly (1) is connected to the main locking assembly (2) through a first connecting rod (5). When the handle (4) is rotated, it drives the upper locking assembly (1) to change its state through the first connecting rod (5). The lower locking assembly (3) is connected to the main locking assembly (2) through a second connecting rod (6). When the handle (4) is rotated, it drives the lower locking assembly (3) to change its state through the second connecting rod (6).
2. The multi-mode locking device for explosion-proof and anti-rebound doors according to claim 1, characterized in that: The main locking assembly (2) includes a first locking seat (20) installed on the door leaf (7), a first locking cover (21) detachably installed on the first locking seat (20), a fan shaft (22) rotatably installed on the first locking seat (20), a first gear (23) fixedly installed on the fan shaft (22), a first active lock head (24) horizontally slidably installed on the first locking seat (20), a first linkage rod (25) vertically slidably installed on the first locking seat (20), and a normally open lock head (26) elastically slidably installed on the first locking seat (20). Both the first active lock head (24) and the first linkage rod (25) are provided with racks that mesh with the first gear (23).
3. The multi-mode locking device for explosion-proof and anti-rebound doors according to claim 2, characterized in that: A push rod (27) is fixedly installed on the top of one end of the first active lock head (24), and a limit rod (28) is fixedly installed at the bottom of one end of the normally open lock head (26). When the upper locking assembly (1), the main locking assembly (2) and the lower locking assembly (3) are all in the closed state, the push rod (27) contacts the limit rod (28).
4. The multi-mode locking device for explosion-proof and anti-rebound doors according to claim 3, characterized in that: A spring (29) is installed between the normally open lock head (26) and the end of the first locking seat (20), the spring (29) allowing the normally open lock head (26) to extend to the outside of the first locking seat (20).
5. The multi-mode locking device for explosion-proof and anti-rebound doors according to any one of claims 2 to 4, characterized in that: The upper locking assembly (1) has the same structure as the lower locking assembly (3), including a second locking seat (10) installed on the door leaf (7), a second locking cover (11) detachably installed on the second locking seat (10), a second gear (12) rotatably installed on the second locking seat (10), a second active lock head (13) and a second passive lock head (14) horizontally slidably installed on the second locking seat (10), and a second linkage rod (15) vertically slidably installed on the second locking seat (10). Both the second active lock head (13) and the second linkage rod (15) are provided with racks that mesh with the second gear (12).
6. The multi-mode locking device for explosion-proof and anti-rebound doors according to claim 5, characterized in that: The second active lock head (13) and the second passive lock head (14) are fixedly connected by a connecting rod (16).
7. The multi-mode locking device for explosion-proof and anti-rebound doors according to claim 6, characterized in that: The second linkage (15) is connected to the first linkage (25) through the first connecting rod (5) or the second connecting rod (6).
8. The multi-mode locking device for explosion-proof and anti-rebound doors according to claim 1, characterized in that: A decorative cover (8) is provided on the outside of the upper locking assembly (1), the main locking assembly (2) and the lower locking assembly (3).
9. The multi-mode locking device for explosion-proof and anti-rebound doors according to claim 2, characterized in that: The normally open lock head (26) is provided with an arc-shaped latch or a zigzag latch at its end.