Civil air defense door locking structure
By designing a locking structure for air-raid shelter doors that combines motor drive and manual operation, the problems of mechanical wear and power interruption in traditional air-raid shelter door locking structures have been solved. This enables normal opening and closing functions under both normal and interrupted power conditions, thereby improving safety and applicability.
Patent Information
- Application Number
- CN202422953137.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-02
AI Technical Summary
Traditional air defense door locking structures are prone to problems such as loosening and jamming of the locking tongue due to mechanical wear and unreasonable design, resulting in the failure of the locking function. They also lack effective measures to prevent misoperation and illegal opening, resulting in insufficient security. Furthermore, they cannot be opened and closed normally when the power supply is interrupted, affecting the use of air defense projects and the safety of personnel.
A locking structure for air-raid shelter doors was designed, combining motor drive and manual operation modes. The lock tongue is precisely controlled through the cooperation of a sliding block, lead screw, and locking tongue. An electromagnetic plate and a rotating base are used to switch operating modes, ensuring that the door can be opened and closed normally whether the power supply is normal or interrupted.
It enables efficient automatic opening and closing of the door when the power supply is normal, improving operational efficiency; and provides manual backup operation when the power is interrupted, ensuring normal use of the door and enhancing security and applicability.
Smart Images
Figure CN223621381U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of civil defense door lock technology, and in particular to a civil defense door locking structure. Background Technology
[0002] Civil defense refers to the activities of the government mobilizing and organizing the masses to take measures to prevent air raids, fight disasters and provide relief, carry out rescue operations, and prevent and mitigate the harm of disasters. Civil defense airtight doors are a type of civil defense protection equipment and are the doors at the entrances and exits of civil defense projects. Among them, the civil defense door locking system is the most important structure of the civil defense door to resist the residual pressure of the blast shock wave. It is the most important component to ensure that the civil defense door can maintain its airtight function when subjected to the residual pressure of the shock wave.
[0003] Traditional locking mechanisms, due to mechanical wear and inadequate structural design, are prone to problems such as loosening and jamming of the locking tongue during long-term use, leading to locking failure or instability. Some structures lack effective measures to prevent misoperation and unauthorized opening, posing security risks. Furthermore, in the event of power outages due to natural disasters or other emergencies, the lack of backup operating methods prevents the door from opening and closing properly, severely impacting the normal use of civil defense projects and the safety of personnel. Therefore, this patent requires upgrading and modification based on existing technology. Utility Model Content
[0004] To address the shortcomings of existing technologies, this application provides a locking structure for air-raid shelter doors, overcoming these deficiencies. It aims to solve the problems of loosening and jamming of the locking tongue in traditional locking structures during long-term use due to mechanical wear and inadequate structural design, leading to locking function failure or instability. Some structures lack effective measures to prevent misoperation and unauthorized opening, posing security risks. Furthermore, in the event of power outages due to natural disasters or other special circumstances, the door cannot be opened or closed normally without backup operating methods, seriously affecting the normal use of air-raid shelter facilities and the safety of personnel.
[0005] To achieve the above objectives, this application provides the following technical solution: a locking structure for a civil defense door, comprising a door body, a locking structure, and a control structure. The control structure is located in the middle of the door body. The locking structure has two sets symmetrically arranged at the upper and lower ends of the door body. The locking structure includes a sliding block, which has a U-shaped structure and is sleeved on the outside of the locking structure. The locking structure has a groove near the middle of the door body. One end of the sliding block is slidably connected to the inside of the groove. A lead screw is rotatably connected to the middle of the groove, and the sliding block is slidably connected to the outside of the lead screw. The locking structure has a contraction groove inside. A rotating shaft is rotatably connected to one end of the bottom of the contraction groove. A lock tongue is fixedly connected to the outside of the rotating shaft. A spring is fixedly connected inside the contraction groove, and the other end of the spring is fixedly connected to the inside of the lock tongue.
[0006] By adopting the above technical solution, in the initial state, the sliding block is located at the bottom. At this time, the spring inside the contraction groove will push the lock tongue to rotate outward around the pivot. After the lock tongue rotates outward, it will abut against the inside of the door frame to achieve the locking function. When the sliding block slides upward along the slide groove, the sliding block will fit and push the lock tongue to rotate inward around the pivot. When the sliding block rises to the top, the lock tongue is completely pushed into the contraction groove. At this time, the door is in an unlocked state.
[0007] As a preferred technical solution of this application, the control structure is internally connected to a rotating rod, and the rotating rod and the lead screw are fixedly connected and are concentric circles.
[0008] By adopting the above technical solution, the rotating rod can drive the lead screw to rotate synchronously when it rotates, and the synchronously rotating lead screw can be used to lock and unlock.
[0009] As a preferred technical solution of this application, the rotating rod is fixedly connected to a gear ring at the upper end of the control structure, a gear is meshed with the outer side of the gear ring, a motor is fixedly connected to the control structure near the gear, and the motor drive end is fixedly connected to the middle position of the gear.
[0010] By adopting the above technical solution, starting the motor drives the gear to rotate, which in turn drives the meshing gear ring to rotate, thereby rotating the rotating rod. The rotating rod then drives the lead screw to rotate, which in turn moves the sliding block connected by the outer thread, thus pushing the bolt inward or extending it out of the retraction groove, thereby achieving the unlocking or locking function.
[0011] As a preferred technical solution of this application, the rotating rod is fixedly connected to a vertical helical gear at the lower end of the control structure, a vertical rotating gear is meshed with the outer side of the vertical helical gear, a connecting rod is fixedly connected to the center of the vertical rotating gear, and a turntable is fixedly connected to the end of the connecting rod.
[0012] By adopting the above technical solution, the connecting rod is rotated by manually rotating the turntable, which in turn drives the vertical rotating gear to rotate, which in turn drives the meshing vertical helical gear to rotate, and the vertical helical gear drives the rotating rod to rotate, thereby realizing the door's unlocking or locking function.
[0013] As a preferred technical solution of this application, a limiting block is fixedly connected to the top of the shrinkage groove, and a connecting block is fixedly connected to the top of the locking tongue.
[0014] By adopting the above technical solution, when the bolt rotates outward along the pivot, the connecting block just abuts against the inner side of the limiting block, thereby preventing the bolt from falling off.
[0015] As a preferred technical solution of this application, a sliding rod is fixedly connected to the inner side of the limiting block, one end of the sliding rod is fixedly connected to the inside of the shrinkage groove, and the connecting block is slidably connected to the outer side of the sliding rod.
[0016] By adopting the above technical solution, the sliding rod can be set to enable the locking tongue to rotate stably around the pivot.
[0017] As a preferred technical solution of this application, a sliding rod is fixedly connected to the control structure near the vertical rotating gear, a rotating base is slidably connected to the outside of the sliding rod, and a connecting rod is rotatably connected inside the rotating base.
[0018] By adopting the above technical solution, the vertical rotating gear can be moved up and down by the setting of the rotating base, thereby realizing the connection and disconnection between the vertical rotating gear and the vertical helical gear.
[0019] As a preferred technical solution of this application, an electromagnetic plate is fixedly connected to the bottom of the control structure at a position directly below the bottom of the rotating base.
[0020] By adopting the above technical solution, when the motor is started, the current will drive the electromagnetic plate to generate electromagnetic force. At the same time, there are magnetic poles that repel each other at the bottom of the rotating base. At this time, the electromagnetic plate will push the rotating base to move upward along the sliding rod. At this time, the vertical helical gear and the vertical rotating gear will no longer be connected. When the motor is turned off, the electromagnetic plate will not be powered to generate electromagnetic force, the position of the rotating base will not change, and the vertical rotating gear and the vertical helical gear will be meshed with each other. At this time, the opening and closing state of the door can be controlled by rotating the turntable.
[0021] The beneficial effects of this application are:
[0022] In this invention, the locking structure utilizes a spring to push the bolt to achieve initial locking, which is simple and effective, ensuring the door is properly closed. The sliding block, in conjunction with the lead screw and the slide groove, precisely controls the extension and retraction of the bolt, accurately completing the locking and unlocking functions. In the control structure, the motor drive part and the manual operation part work together seamlessly, and the operation mode is switched through the electromagnetic plate and the rotating base.
[0023] 2. In this utility model, the locking structure of the air-raid shelter door has both electric and manual operation modes. The electric operation mode is convenient and quick, suitable for frequent daily use or automated control scenarios. Simply start the motor, and the transmission system can accurately drive the bolt movement to efficiently complete the locking and unlocking, greatly improving operational efficiency. The manual operation mode serves as an emergency backup, playing a crucial role in special circumstances such as power outages or electrical control system failures. By manually rotating the turntable, locking and unlocking can be smoothly achieved, ensuring that the air-raid shelter door can be used normally under any circumstances, enhancing the door's applicability and reliability. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the front structure of this application;
[0025] Figure 2 This is a schematic diagram of the rear structure of this application;
[0026] Figure 3 This is a schematic diagram of the front section structure of this application;
[0027] Figure 4 This is a schematic diagram of the side section structure of this application.
[0028] In the diagram: 1. Door body; 2. Locking structure; 201. Sliding block; 202. Slide groove; 203. Lead screw; 204. Contraction groove; 205. Spring; 206. Slide rod; 207. Limiting block; 208. Rotating shaft; 209. Lock tongue; 210. Connecting block; 3. Control structure; 301. Rotating rod; 302. Gear ring; 303. Gear; 304. Motor; 305. Vertical helical gear; 306. Vertical rotating gear; 307. Connecting rod; 308. Turntable; Rotating base (309); Rotating base; 310. Sliding rod; 311. Electromagnetic plate. Detailed Implementation
[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0030] Reference Figure 1-4A locking structure for a fire-fighting door includes a door body 1, a locking structure 2, and a control structure 3. The control structure 3 is located in the middle of the door body 1. The locking structure 2 has two sets symmetrically arranged at the upper and lower ends of the door body 1. The locking structure 2 includes a sliding block 201, which has a U-shaped structure and is fitted onto the outside of the locking structure 2. The locking structure 2 has a groove 202 near the middle of the door body 1. One end of the sliding block 201 is slidably connected to the inside of the groove 202. A lead screw 203 is rotatably connected to the middle of the groove 202, and the sliding block 201 is slidably connected to the outside of the lead screw 203. The locking structure 2 has a contraction groove 204 inside, and a rotating shaft 208 is rotatably connected to the bottom end of the contraction groove 204. A latch 209 is fixedly connected to the outside of shaft 208, and a spring 205 is fixedly connected inside the contraction groove 204. The other end of the spring 205 is fixedly connected to the inside of the latch 209. In the initial state, the sliding block 201 is located at the bottom of the 2nd position. At this time, the spring 205 inside the contraction groove 204 will push the latch 209 to rotate outward around the shaft 208. After the latch 209 rotates outward, it will press against the inside of the door frame to achieve the locking function. When the sliding block 201 slides upward along the slide groove 202, the sliding block 201 will press against the latch 209 to rotate inward around the shaft 208. When the sliding block 201 rises to the top, the latch 209 is completely pushed into the inside of the contraction groove 204. At this time, the door is in an unlocked state.
[0031] In this embodiment, as Figure 1 - Figure 4 As shown, the control structure 3 has a rotating rod 301 rotatably connected inside. The rotating rod 301 and the lead screw 203 are fixedly connected and are concentric circles. This enables the rotating rod 301 to drive the lead screw 203 to rotate synchronously when rotating, and the synchronously rotating lead screw 203 is used to lock and unlock.
[0032] In this embodiment, as Figure 1 - Figure 4 As shown, a gear ring 302 is fixedly connected to the upper part of the rotating rod 301 inside the control structure 3. A gear 303 is meshed with the outer side of the gear ring 302. A motor 304 is fixedly connected to the control structure 3 near the gear 303. The drive end of the motor 304 is fixedly connected to the middle of the gear 303. By starting the motor 304, the motor 304 drives the gear 303 to rotate, which in turn drives the meshed gear ring 302 to rotate, thereby realizing the rotation of the rotating rod 301. The rotating rod 301 drives the lead screw 203 to rotate, and the rotation of the lead screw 203 will drive the sliding block 201 with its outer thread to move, thereby pushing the lock tongue 209 to retract inward or extend out from the retraction groove 204, thus realizing the unlocking or locking function.
[0033] In this embodiment, as Figure 1 - Figure 4As shown, a vertical helical gear 305 is fixedly connected to the lower end of the rotating rod 301 inside the control structure 3. A vertical rotating gear 306 is meshed with the outer side of the vertical helical gear 305. A connecting rod 307 is fixedly connected to the center of the vertical rotating gear 306. A turntable 308 is fixedly connected to the end of the connecting rod 307. By manually rotating the turntable 308, the connecting rod 307 is rotated, which in turn drives the vertical rotating gear 306 to rotate. The vertical rotating gear 306 then drives the meshed vertical helical gear 305 to rotate, which in turn drives the rotating rod 301 to rotate, thereby realizing the door's unlocking or locking function.
[0034] In this embodiment, as Figure 1 - Figure 4 As shown, a limiting block 207 is fixedly connected to the top of the shrink groove 204, and a connecting block 210 is fixedly connected to the top of the locking tongue 209. When the locking tongue 209 rotates outward along the rotating shaft 208, the connecting block 210 just abuts against the inner side of the limiting block 207, thereby preventing the locking tongue 209 from falling off.
[0035] In this embodiment, as Figure 1 - Figure 4 As shown, a slide rod 206 is fixedly connected to the inner side of the limiting block 207. One end of the slide rod 206 is fixedly connected to the inside of the shrink groove 204, and the connecting block 210 is slidably connected to the outside of the slide rod 206. The sliding rod 206 enables the locking tongue 209 to rotate stably around the rotating shaft 208.
[0036] In this embodiment, as Figure 1 - Figure 4 As shown, a sliding rod 310 is fixedly connected to the control structure 3 near the vertical rotating gear 306. A rotating base 309 is slidably connected to the outside of the sliding rod 310. A connecting rod is rotatably connected inside the rotating base. The rotating base 309 can drive the vertical rotating gear 306 to move up and down, thereby realizing the connection and disconnection between the vertical rotating gear 306 and the vertical helical gear 305.
[0037] In this embodiment, as Figure 1 - Figure 4As shown, an electromagnetic plate 311 is fixedly connected to the bottom of the control structure 3, located directly below the bottom of the rotating base 309. When the motor 304 is started, the current will drive the electromagnetic plate 311 to generate electromagnetic force. At the same time, there are magnetic poles that repel each other at the bottom of the rotating base 309. At this time, the electromagnetic plate 311 will push the rotating base 309 to move upward along the sliding rod 310. At this time, the vertical helical gear 305 and the vertical rotating gear 306 are no longer connected. When the motor 304 is turned off, the electromagnetic plate 311 will not be powered to generate electromagnetic force, and the position of the rotating base 309 will not change. The vertical rotating gear 306 and the vertical helical gear 305 are meshed with each other. At this time, the opening and closing state of the door can be controlled by rotating the turntable 308.
[0038] Working principle: During the unlocking process driven by the motor, the motor 304 in the control structure 3 is started. The drive end of the motor 304 drives the gear 303 to rotate. Since the gear 303 meshes with the gear ring 302, the rotational force of the gear 303 is transmitted to the gear ring 302, causing the gear ring 302 to drive the rotating rod 301 to rotate. The rotating rod 301 is fixedly connected to the lead screw 203 and they are concentric circles, so the lead screw 203 rotates synchronously with the rotating rod 301. The rotation of the lead screw 203 drives the sliding block 201, which is connected to the outer thread, to slide upward along the slide groove 202. During the upward sliding process, the sliding block 201 engages with and pushes the latch 209 to rotate inward around the pivot 208. When the sliding block 201 rises to the uppermost end of the slide groove 202, the latch 209 is fully pushed into the retraction groove 204, at which point the door is unlocked. When it is necessary to relock the door, the motor 304 is started in reverse. The motor 304 drives the gear 303 to rotate in reverse, which in turn causes the gear ring 302, the rotating rod 301, and the lead screw 203 to rotate in reverse as well. The reverse rotation of the lead screw 203 drives the sliding block 201 to slide downward along the slide groove 202. As the sliding block 201 slides down, the spring 205 pushes the latch 209 to rotate outward around the pivot 208. When the sliding block 201 returns to the bottom of the slide groove 202, the latch 209 extends fully and abuts against the inside of the door frame, and the door is locked again.
[0039] During manual unlocking, the operator manually rotates the turntable 308 in control structure 3. The rotation of the turntable 308 drives the connecting rod 307 to rotate, and the rotational force of the connecting rod 307 is transmitted to the vertical rotating gear 306, causing the vertical rotating gear 306 to rotate. Since the vertical rotating gear 306 meshes with the vertical helical gear 305, the rotation of the vertical rotating gear 306 drives the vertical helical gear 305 to rotate. The vertical helical gear 305 is fixed on the rotating rod 301, and the rotation of the vertical helical gear 305 drives the rotating rod 301 to rotate. The connection between the rotating rod 301 and the lead screw 203 causes the lead screw 203 to rotate accordingly, thereby driving the sliding block 201 along the slide groove 202. Sliding upwards, the sliding block 201 pushes the latch 209 to rotate inwards around the pivot 208. When the sliding block 201 reaches the uppermost end of the slide groove 202, the latch 209 is fully retracted into the contraction groove 204, and the door is opened. Manually rotating the turntable 308 in the opposite direction causes the connecting rod 307, the vertical rotating gear 306, the vertical helical gear 305, the rotating rod 301, and the lead screw 203 to rotate in the opposite direction. The sliding block 201 slides downwards along the slide groove 202. Under the action of the spring 205, the latch 209 rotates outwards around the pivot 208. When the sliding block 201 returns to the bottom of the slide groove 202, the latch 209 extends and abuts against the door frame, completing the locking.
[0040] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A locking structure for a civil defense door, comprising a door body (1), a locking structure (2), and a control structure (3), characterized in that, The control structure (3) is located in the middle of the door body (1). The locking structure (2) has two sets symmetrically arranged at the upper and lower ends of the door body (1). The locking structure (2) includes a sliding block (201). The sliding block (201) has a U-shaped structure and is sleeved on the outside of the locking structure (2). The locking structure (2) has a groove (202) near the middle of the door body (1). One end of the sliding block (201) is slidably connected to the inside of the groove (202). A lead screw (203) is rotatably connected to the middle position of the groove (202). The sliding block (201) is slidably connected to the outside of the lead screw (203). The locking structure (2) is provided with a shrinkage groove (204) inside. A rotating shaft (208) is rotatably connected to one end of the bottom of the shrinkage groove (204). A locking tongue (209) is fixedly connected to the outside of the rotating shaft (208). A spring (205) is fixedly connected inside the shrinkage groove (204). The other end of the spring (205) is fixedly connected to the inside of the locking tongue (209).
2. The locking structure for a civil defense door according to claim 1, characterized in that, The control structure (3) has a rotating rod (301) inside, and the rotating rod (301) and the lead screw (203) are fixedly connected and are concentric circles.
3. The locking structure for a civil defense door according to claim 2, characterized in that, The rotating rod (301) is fixedly connected to the upper end of the control structure (3) with a gear ring (302). The gear ring (302) is meshed with a gear (303) on the outside. The control structure (3) is fixedly connected to a motor (304) on the side near the gear (303). The drive end of the motor (304) is fixedly connected to the middle position of the gear (303).
4. The locking structure for a civil defense door according to claim 2, characterized in that, The rotating rod (301) is fixedly connected to a vertical helical gear (305) at the lower end of the control structure (3). A vertical rotating gear (306) is meshed with the outer side of the vertical helical gear (305). A connecting rod (307) is fixedly connected to the center of the vertical rotating gear (306). A turntable (308) is fixedly connected to the end of the connecting rod (307).
5. The locking structure for a civil defense door according to claim 1, characterized in that, The top of the contraction groove (204) is fixedly connected to a limiting block (207), and the top of the locking tongue (209) is fixedly connected to a connecting block (210).
6. The locking structure for a civil defense door according to claim 5, characterized in that, A slide rod (206) is fixedly connected to the inner side of the limiting block (207). One end of the slide rod (206) is fixedly connected to the inside of the shrinkage groove (204), and the connecting block (210) is slidably connected to the outside of the slide rod (206).
7. The locking structure for a civil defense door according to claim 1, characterized in that, The control structure (3) has a sliding rod (310) fixedly connected to the side near the vertical rotating gear (306). A rotating base (309) is slidably connected to the outside of the sliding rod (310), and a connecting rod (307) is rotatably connected inside the rotating base (309).
8. The locking structure for a civil defense door according to claim 7, characterized in that, The control structure (3) has an electromagnetic plate (311) fixedly connected to the bottom of the rotating base (309).