Civil air defense door locking device with sealing linkage structure

Abstract

The application discloses a sealing linkage structure civil air defense door locking device, belonging to the civil air defense door sealing technical field, including door leaf, with door leaf rotation cooperation lock piece and drive link rod of lock piece action, the connecting part of lock piece is articulated with link rod, still includes: sealing element and the sealing gasket arranged on the sealing element, the sealing element is rotatably installed on one side of the door leaf through the connecting shaft; the rotating rod is configured to be able to drive the sealing element to rotate around the connecting shaft axis, U-shaped piece, the U-shaped piece is arranged at the bottom of the link rod; through a set of driving mechanism, lock piece and sealing element are linked, especially suitable for the civil air defense door without door sill, in the process of closing the door leaf, pulling the pull rod can complete the locking of lock piece and the sealing of the sealing element to the bottom of the door leaf simultaneously, thereby improving the operation efficiency, so that there is sufficient time to deal with emergency.

Description

Technical Field

[0001] This invention relates to the field of air defense door sealing technology, and in particular to an air defense door locking device with a sealing linkage structure. Background Technology

[0002] As a key protective device in civil defense projects to ensure the safety of personnel and materials, the reliability of the locking mechanism and the tightness of the seal directly affect the core functions of wartime protection, smoke isolation, and shock wave resistance. At present, thresholdless civil defense doors are widely used in underground garages, civil defense passages and other scenarios due to their convenient passage and strong adaptability to obstacles. However, because this type of structure eliminates the traditional threshold, a sealing gap is easily left between the bottom of the door leaf and the ground, which becomes a weak link in airtight protection.

[0003] Chinese invention patent CN121088282B discloses a sealing structure for a thresholdless air-raid shelter door. When the limiting component moves down to the ground and is squeezed, the limiting component unlocks the slider from the connecting block and locks the slider to the door leaf. In this case, during the downward pushing of the sealing plate, the sealing plate can deflect downward and press against the door leaf and the ground, thereby achieving a seal between the door leaf and the ground.

[0004] The above structure adopts a design in which the locking mechanism and the sealing mechanism operate independently and separately. When in use, two operations, namely locking the door leaf and sealing the bottom, need to be performed separately. The steps are cumbersome and time-consuming, and it is impossible to achieve rapid synchronous locking and sealing. It is difficult to meet the requirements of rapid closure and immediate protection in emergency situations of civil defense projects. Meanwhile, the above structure relies on positioning strips to control the vertical hinge position of the sealing plate so that the sealing plate can be flipped over and sealed to the ground. However, this method relies on single-point positioning detection, and there are problems with positioning deviation and poor adaptability to working conditions in actual use. When the ground surface is recessed or uneven in the area corresponding to the positioning strip, the sealing plate cannot adaptively fit the ground, resulting in sealing failure.

[0005] Therefore, it is necessary to provide a locking device for air-raid shelter doors with a sealing linkage structure to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a locking device for air-raid shelter doors with a sealing linkage structure to solve the technical problems mentioned in the background art.

[0007] Based on the above ideas, the present invention provides the following technical solution: a locking device for a civil defense door with a sealing linkage structure, comprising a door leaf, a lock that rotates with the door leaf, and a connecting rod for driving the lock to move, wherein the connecting part of the lock is hinged to the connecting rod, and further comprising: A sealing element and a sealing gasket disposed on the sealing element, wherein the sealing element is rotatably mounted on one side of the door leaf via a connecting shaft; A rotating rod, configured to drive the seal to rotate about the axis of the connecting shaft; The U-shaped component is located at the bottom of the connecting rod, and the horizontal shaft fixed inside the U-shaped component passes through the guide groove preset on the rotating rod. This allows the connecting rod to drive the lock to close the door leaf, while the relative movement of the horizontal shaft and the guide groove causes the sealing component to deflect and seal the bottom of the door leaf.

[0008] As a further aspect of the present invention: a base is mounted on the sealing element, and a connecting shaft is disposed through the base. The sealing element is movably fitted with the base along the diameter direction of the connecting shaft. By adjusting the position of the sealing element relative to the base, the sealing gasket is always rotated to a sealing state in a posture that is in contact with the ground.

[0009] As a further aspect of the present invention: a pressing member is fixed between the two rotating rods, and the pressing member cooperates with the base to drive the sealing member to deflect to one side of the door leaf; The base end face is provided with a stop pin, and the outer wall of the rotating rod is provided with a protrusion that cooperates with the stop pin. When the rotating rod deflects downward, the protrusion tends to move away from the stop pin, so that the sealing element can deflect downward around the connecting shaft axis under its own gravity.

[0010] As a further aspect of the present invention: a locking pin is elastically provided on the base along the diameter direction of the connecting shaft, and a pin hole that cooperates with the locking pin is opened on the outer circular surface of the connecting shaft. When the locking pin is inserted into the pin hole, the base and the connecting shaft are locked; a magnetic element is provided on the pressing member. When the magnetic element is aligned with the locking pin, the locking pin is magnetically pulled out of the pin hole, thereby unlocking the base and the connecting shaft.

[0011] As a further aspect of the present invention: during the process of the rotating rod rotating relative to the base to unlock the base and the connecting shaft, the rotating rod drives the seal to move relative to the base through a gear set.

[0012] As a further aspect of the present invention: the gear set includes a rack embedded in the inner wall of the seal, a rotating shaft is provided on the base, a gear and a worm gear are fixed on the rotating shaft, the gear meshes with the rack, a worm is meshed at the worm gear, a bevel gear is provided at one end of the worm, the bevel gear can drive the worm to rotate synchronously or rotate relative to the worm, and a bevel rack that rotates synchronously with the rotating rod is meshed at the bevel gear; when the base is locked to the connecting shaft and the rotating rod drives the bevel rack to rotate, the seal can be driven to slide relative to the base through the meshing of the bevel rack and the bevel gear.

[0013] As a further aspect of the present invention: a pull rod is hinged to the connecting rod, and one end of the pull rod near the side of the door leaf is hinged to the door leaf.

[0014] As a further aspect of the present invention: the sealing element is a plate-shaped structure with an L-shaped cross-section. When the sealing element is in a sealed state, the sealing gasket can tightly abut against the ground and one side of the door leaf.

[0015] As a further aspect of the present invention: the connecting shaft is rotatably engaged with the hinge seat on the side wall of the door leaf, and a protrusion is formed on the outer circular surface of the connecting shaft along the diameter direction of the connecting shaft. The end face of the hinge seat extends outward along a direction parallel to the axis of the connecting shaft to form a stop portion that engages with the protrusion.

[0016] As a further embodiment of the present invention: a bracket is sleeved on the smooth part of the worm gear, the worm gear and the bracket are rotatably engaged, and the bracket is fixedly connected to the base.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. A set of drive mechanisms links the lock and the seal, which is especially suitable for thresholdless air defense doors. When the door is closed, pulling the lever can simultaneously lock the lock and seal the bottom of the door, thereby improving operational efficiency and allowing sufficient time to deal with emergencies.

[0018] 2. Through the sliding fit between the sealing element and the base, the sealing gasket can always be flipped downwards in a posture that is in contact with the ground, thereby achieving a good sealing effect on the bottom of the door leaf; in addition, through the self-locking effect of the worm gear and worm, the sealing element can stably maintain the sealing state on the bottom of the door leaf. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the sealing element of the present invention in a sealed state; Figure 3 This is a schematic diagram of the sealing element of the present invention being deflected toward the side away from the door leaf; Figure 4 This is the present invention. Figure 3 A magnified structural diagram at point A; Figure 5 This is a schematic diagram showing the state of the sealing gasket of the present invention in contact with the ground; Figure 6 This is a schematic diagram of the gear set structure of the present invention; Figure 7 This is the present invention. Figure 6 A magnified structural diagram at point B; Figure 8 This is a schematic diagram of the engagement between the protrusion and the retaining pin of the present invention; Figure 9 This is a schematic diagram of the fit between the extrusion component and the base of the present invention; Figure 10 This is the present invention. Figure 9 A magnified structural diagram at point C.

[0021] Figure 11 This is a schematic diagram of the sleeve and the rotating rod of the present invention.

[0022] In the diagram: 1. Door leaf; 2. Connecting rod; 201. Pin; 202. U-shaped part; 203. Horizontal shaft; 3. Lock; 301. Lock head; 302. Connecting part; 4. Pull rod; 401. Pin cylinder; 5. Seal; 501. Guide post; 502. Sealing gasket; 6. Connecting shaft; 601. Pin hole; 602. Protrusion; 7. Hinge seat; 701. Stop part; 8. Base; 801. 9. Stop pin; 10. Rotary rod; 11. Guide groove; 12. Protrusion; 13. Extruded part; 14. Arc-shaped part; 15. Shaft; 16. Gear; 17. Bevel rack; 18. Bevel gear; 19. Sleeve; 10. Positioning groove; 10. Bracket; 11. Rack; 12. Worm gear; 23. Locking pin; 24. Convex ring; 25. Magnetic part; 26. Positioning pin. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features described therein can be combined with each other.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the illustrations only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] like Figures 1-11 As shown, a locking device for a civil defense door with a sealing linkage structure includes a door leaf 1, a lock 3 and a sealing element 5 disposed on one side of the door leaf 1, wherein the lock 3 and the sealing element 5 are driven by the same set of drive mechanisms to achieve locking and sealing operations.

[0026] Specific reference Figures 1-3As shown, the driving mechanism includes a connecting rod 2 and a U-shaped piece 202 fixed to the bottom end of the connecting rod 2. A pull rod 4 is hinged to the connecting rod 2, and one end of the pull rod 4 near the side of the door leaf 1 is hinged to the door leaf 1.

[0027] The lock 3 includes a cylindrical body, a lock head 301 fixed to the outer circumferential surface of the cylindrical body and extending outward along the diameter of the cylindrical body, and a connecting part 302. The cylindrical body can rotate relative to the door leaf 1 about a fixed axis, and one end of the connecting part 302 is hinged to the connecting rod 2. Specifically, a pin 201 is installed on the connecting rod 2, and the pin 201 is rotatably engaged with the connecting rod 2 and the connecting part 302.

[0028] The sealing element 5 has a plate-like structure with an L-shaped cross-section. An L-shaped sealing gasket 502 is fixedly embedded near the bottom of the sealing element 5. The sealing element 5 is capable of rotating about an axis parallel to the width of the door leaf 1. When the sealing element 5 deflects... Figures 1-2 In the state shown, the sealing gasket 502 can fit tightly against the ground and one side of the door leaf 1, thereby sealing the bottom of the door leaf 1.

[0029] The top of the vertical section of the sealing element 5 is fixedly connected to a T-shaped base 8. A connecting shaft 6 is provided on the side of the door leaf 1 near the base 8. The connecting shaft 6 passes through a pre-set through hole on the base 8, allowing the sealing element 5 and the base 8 to rotate around the axis of the connecting shaft 6. Hinges 7 are provided at both ends of the connecting shaft 6, and the connecting shaft 6 passes through the hinges 7, which are fixedly connected to the door leaf 1.

[0030] A rotating rod 9 is provided between the base 8 and the hinge seat 7, and the connecting shaft 6 passes through the rotating rod 9. In one embodiment, the rotating rod 9 can drive the base 8 to rotate around the connecting shaft 6. The line rotates synchronously, thereby driving the seal 5 to flip.

[0031] A horizontal shaft 203 is installed at the bottom of the U-shaped component 202. The horizontal shaft 203 is parallel to the width direction of the door leaf 1. A through guide groove 901 is provided on the rotating rod 9 along its own length direction. The horizontal shaft 203 passes through the guide groove 901 and can move freely within the guide groove 901.

[0032] The aforementioned connecting rod 2, locking element 3, and pull rod 4 can form a parallelogram-like structure. When the pull rod 4 is pulled, the connecting rod 2 can drive multiple sets of locking elements 3 to deflect around the axis of the cylinder, so that the lock head 301 of the locking element 3 can be inserted into the lock hole of the door frame. At the same time, as the connecting rod 2 moves downward, the cooperation between the horizontal shaft 203 and the guide groove 901 can drive the rotating rod 9 to deflect downward around the axis of the connecting shaft 6, thereby driving the sealing element 5 to deflect downward to seal the bottom of the door leaf 1.

[0033] In summary, this solution uses a drive mechanism to link the lock 3 and the seal 5, which is especially suitable for thresholdless air-raid shelter doors. When closing the door leaf 1, pulling the lever 4 can simultaneously lock the lock 3 and seal the bottom of the door leaf 1 with the seal 5, thereby improving operational efficiency and allowing sufficient time to deal with emergencies.

[0034] Combination Figure 5 As shown, the right-angle inflection point on the outer side of the sealing gasket 502 is denoted as point a, and the sealing element 5 deflects downwards as shown. Figure 5 In the pre-sealed state shown, the inflection point a at the bottom of the sealing gasket 502 will contact the ground first. Then, as the rotating rod 9 drives the sealing element 5 to rotate synchronously, the sealing gasket 502 maintains tight contact with the ground, allowing it to deform. When the sealing element 5 is in such a state... Figure 2 In the state shown, the bottom of the door leaf 1 can be well sealed by the deformed sealing gasket 502.

[0035] However, in actual use, the ground may become sunken, which will cause the seal 5 to deflect to Figure 2 In the shown sealed state, the sealing gasket 502 does not make sufficient contact with the ground, resulting in a decrease in sealing effect. Therefore, this solution sets the sealing element 5 to a movable state relative to the base 8, so that the sealing element 5 is in the position shown... Figure 5 In the pre-sealed state shown, the sealing element 5 can move relative to the base 8, so that the inflection point a on the outer side of the sealing gasket 502 can remain in contact with the ground, thereby preparing for the subsequent sealing.

[0036] The base 8 can be locked to or unlocked relative to the connecting shaft 6. Specifically: The base 8 is provided with a retaining pin 20, which elastically engages with the base 8 along the diameter direction of the connecting shaft 6. A pin hole 601 is provided on the outer circumference of the connecting shaft 6 to engage with the retaining pin 20. When the sealing member 5 is in such a state... Figure 5 In the pre-sealed state shown, one end of the locking pin 20 can be inserted into the pin hole 601 to lock the base 8 and the connecting shaft 6. A plate-shaped pressing member 10 is fixed between the two rotating rods 9. The pressing member 10 is provided with an arc-shaped part 1001 that fits against the top circumferential surface of the base 8. A magnetic member 21 is fixedly embedded in the inner wall of the arc-shaped part 1001. When the pressing member 10 rotates relative to the base 8 so that the magnetic member 21 is aligned with the locking pin 20, the magnetic attraction of the magnetic member 21 on the locking pin 20 can cause one end of the locking pin 20 to move out of the pin hole 601, thereby unlocking the base 8 from the connecting shaft 6.

[0037] Combination Figure 8 As shown, a stop pin 801 is fixed at the end of the base 8, and a protrusion 902 is fixed on the outer wall of the rotating rod 9. When the rotating rod 9 is in accordance with... Figure 8 When rotated counterclockwise X as shown, the protrusion 902 can contact the stop pin 801, thereby causing the base 8 and the sealing element 5 to deflect away from the door leaf 1. During the sealing process, the rotating rod 9 rotates in the opposite direction. Figure 8 Rotating in the direction X, as shown, causes the protrusion 902 to tend to disengage from the stop pin 801, while the sealing element 5 deflects downward under its own weight. With this structure, when the base 8 is locked to the connecting shaft 6, the rotating rod 9 can rotate relative to the base 8 and, through a corresponding gear set, drive the sealing element 5 to move relative to the base 8, causing the sealing gasket 502 to adhere to the ground. When the base 8 is unlocked from the connecting shaft 6, the rotating rod 9, through the cooperation of the pressing member 10 and the base 8, drives the sealing element 5 to continue rotating. Because the sealing gasket 502 deflects downward in a posture adhering to the ground, the sealing gasket 502 is under pressure and provides a good seal to the bottom of the door leaf 1.

[0038] The gear set includes a rack 18 fixedly embedded in the vertical section of the seal 5. A gear 13 meshes with the outer side of the rack 18. A rotating shaft 11 is provided at the axis of the gear 13. Specifically, the gear 13 is fixedly sleeved on the outer side of the rotating shaft 11, and a worm gear 19 is also fixedly sleeved on the outer side of the rotating shaft 11. Figures 6-7 As shown, a worm 12 meshes with the outer side of the worm gear 19. A bevel gear 15 is fitted onto one end of the worm 12 extending to the connecting shaft 6. Figure 7 , Figure 11 As shown, a sleeve 16 is fixedly connected to the bottom end face of the bevel gear 15, and the sleeve 16 is engaged with the smooth part of the worm gear 12. Specifically, a positioning pin 22 is provided on the outer circular surface of the worm gear 12, and the positioning pin 22 elastically engages with the worm gear 12 along the diameter direction. A positioning groove 1601 that engages with the positioning pin 22 is provided on the inner wall of the sleeve 16, and the end of the positioning pin 22 extending into the positioning groove 1601 has a spherical structure. Through this structure, the bevel gear 15 can drive the worm gear 12 to rotate synchronously, and when the resistance encountered by the worm gear 12 increases during rotation, the spherical end of the positioning pin 22 can be moved out of the positioning groove 1601.

[0039] The outer side of the bevel gear 15 is meshed with a bevel rack 14 (the bevel rack 14 can be regarded as a section cut from the bevel gear ring), and the bevel rack 14 can rotate synchronously with the rotating rod 9 around the axis of the connecting shaft 6.

[0040] Initially, the seal 5 is in a deflected position away from the door leaf 1. During the closing of the door leaf 1, the connecting rod 2 drives the locking element 3 to lock the door leaf 1 to the door frame. Simultaneously, through the cooperation of the horizontal shaft 203 and the rotating rod 9, the rotating rod 9 is driven to deflect downwards around the axis of the connecting shaft 6. As analyzed above, as the rotating rod 9 deflects downwards, the protrusion 902 tends to move away from the stop pin 801, allowing the seal 5 to deflect downwards around the axis of the connecting shaft 6 under its own gravity. When the seal 5 is in such a position... Figure 5 In the pre-sealed state shown, the locking pin 20 is aligned with the pin hole 601 and one end of the locking pin 20 is inserted into the pin hole 601, thereby locking the base 8 and the connecting shaft 6. At this time, the rotating rod 9 can deflect downward relative to the base 8 and the sealing element 5 around the axis of the connecting shaft 6. During this process, the bevel rack 14 will mesh with the bevel gear 15 at the end of the worm gear 12, specifically in the following two cases: When there is no depression in the ground and the seal 5 is in a pre-sealed state, the inflection point a on the outer side of the sealing gasket 502 can contact the ground, thereby preventing the seal 5 from moving relative to the base 8. At this time, the bevel gear 15 can be driven to rotate independently through the meshing of the bevel rack 14 and the bevel gear 15. When there is a depression in the ground and the seal 5 is in a pre-sealed state, the inflection point a on the outer side of the sealing gasket 502 is still a certain distance away from the ground. At this time, during the rotation of the rotating rod 9 relative to the base 8, the meshing of the bevel rack 14 and the bevel gear 15 can drive the worm 12 to rotate. Thus, the meshing of the worm 12 and the worm wheel 19 can drive the rotating shaft 11 and the gear 13 to rotate. The meshing of the gear 13 and the rack 18 can drive the seal 5 to move relative to the base 8, so that the inflection point a on the outer side of the sealing gasket 502 can contact the ground. Specifically, when the inflection point a on the outer side of the sealing gasket 502 contacts the ground, the movement of the sealing element 5 is restricted. At this time, one end of the positioning pin 22 is squeezed by the side edge of the positioning groove 1601 and retracts into the worm 12, so that the bevel gear 15 can rotate independently relative to the worm 12. Through the cooperation of the above-mentioned transmission structure, when the sealing element 5 is deflected downward to the pre-sealing state, the inflection point a on the outer side of the sealing gasket 502 can remain in contact with the ground. Then, when the rotating rod 9 deflects downward around the axis of the connecting shaft 6, aligning the magnetic element 21 with the locking pin 20, the magnetic attraction allows one end of the locking pin 20 to move out of the pin hole 601, thereby unlocking the base 8 from the connecting shaft 6. It should be noted that during the process of aligning the magnetic element 21 with the locking pin 20 and unlocking the base 8, the pressing element 10 can contact the side of the base 8 away from the door leaf 1, so that when the rotating rod 9 deflects downward, it can stably press the base 8 and the sealing element 5 towards the side closer to the door leaf 1, so that the sealing gasket 502 can deform and finally adhere to both the door leaf 1 and the ground, achieving a good sealing effect on the bottom of the door leaf 1. In addition, through the self-locking effect of the worm gear 19 and the worm 12, the sealing element 5 can stably maintain the sealing state on the bottom of the door leaf 1.

[0041] The above is the core solution of the present invention. The following will explain some adaptive settings: One end of the pull rod 4 is provided with a pin cylinder 401. The pin cylinder 401 and the cylinder of the locking member 3 are both rotatably engaged with the shaft fixed to the side of the door leaf 1. This allows the locking member 3 to rotate around the axis of the cylinder when the pull rod 4 is pulled.

[0042] Combination Figure 2 As shown, a guide post 501 is fixed to the top of the vertical section of the sealing member 5. The guide post 501 passes through the two wings of the base 8 and slides with them.

[0043] Combination Figures 3-4 As shown, in order for the seal 5 to be able to reset, in this design, the connecting shaft 6 and the hinge seat 7 are rotatably engaged. A protrusion 602 extends outward along the diameter of the connecting shaft 6 on its outer circumferential surface, while the end face of the hinge seat 7 extends outward along a direction parallel to the axis of the connecting shaft 6 to form a stop portion 701 that engages with the protrusion 602. When the seal 5 is in such a position... Figure 5 In the pre-sealed state shown, the protrusion 602 contacts the stop 701, thereby preventing the connecting shaft 6 from continuing to rotate relative to the hinge seat 7. At this time, the base 8 and the sealing member 5 remain in the pre-sealed state and wait for the magnetic member 21 to align with the locking pin 20 to unlock the base 8 and the connecting shaft 6. When the seal 5 needs to be reset, the rotating rod 9 can be driven in the opposite direction. Figure 8When the pin 20 is rotated in the X direction, and the pin hole 601 is aligned, the base 8 and the connecting shaft 6 are relocked. When the rotating rod 9 is rotated further away from the door leaf 1, the protrusion 902 cooperates with the stop pin 801 and drives the base 8 and the seal 5 to deflect further away from the door leaf 1. During this process, the protrusion 602 also gradually moves away from the stop part 701 in preparation for the next use.

[0044] Both ends of the rotating shaft 11 are provided with support members, the rotating shaft 11 and the support members are rotatably engaged, and the support members are fixedly connected to the base 8.

[0045] A bracket 17 is fitted onto the smooth part of the worm gear 12, and the worm gear 12 is rotatably engaged with the bracket 17. The bracket 17 is also fixedly connected to the base 8. A support frame is fixed to the bevel rack 14, and the connecting shaft 6 passes through the support frame and is rotatably engaged with it. The support frame is also fixedly connected to the rotating rod 9.

[0046] Reference Figure 10 As shown, the outer circumference of the locking pin 20 protrudes outward along the diameter direction to form a convex ring 2001. The base 8 is provided with a mounting hole for mounting the locking pin 20 and the convex ring 2001. The mounting hole penetrates the base 8 and has a cross-section shaped like a cross. A spring is connected between the end of the mounting hole and the convex ring 2001. When the locking pin 20 is aligned with the pin hole 601, the locking pin 20 can be inserted into the pin hole 601 under elastic force, thereby locking the base 8 and the connecting shaft 6. The magnetic component 21 can be a magnet, and a magnetic sheet can be fixedly embedded at the end of the locking pin 20. The side of the magnetic sheet opposite to the magnet has different magnetic poles, which facilitates the magnetic attraction of the locking pin 20 to disengage it from the pin hole 601.

[0047] Reference Figure 11 As shown, a slot for installing a positioning pin 22 is provided on the outer circular surface of the worm gear 12. A limit spring is connected between the inner end face of the slot and the positioning pin 22, so that the positioning pin 22 and the worm gear 12 are elastically engaged.

[0048] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A locking device for a civil defense door with a sealed linkage structure, comprising a door leaf (1), a lock (3) rotatably engaged with the door leaf (1), and a connecting rod (2) for driving the lock (3) to move, wherein the connecting part (302) of the lock (3) is hinged to the connecting rod (2), characterized in that, Also includes: A sealing element (5) and a sealing gasket (502) disposed on the sealing element (5), the sealing element (5) being rotatably mounted on one side of the door leaf (1) via a connecting shaft (6); A rotating rod (9) is configured to drive the seal (5) to rotate about the axis of the connecting shaft (6); The U-shaped part (202) is located at the bottom of the connecting rod (2), and the horizontal shaft (203) fixed inside the U-shaped part (202) passes through the guide groove (901) preset on the rotating rod (9), so that while the connecting rod (2) drives the lock (3) to lock the door leaf (1), the relative movement of the horizontal shaft (203) and the guide groove (901) causes the sealing element (5) to deflect and seal the bottom of the door leaf (1).

2. The air-raid shelter door locking device with a sealing linkage structure according to claim 1, characterized in that: A base (8) is installed on the sealing element (5), and a connecting shaft (6) is set through the base (8). The sealing element (5) is movably engaged with the base (8) along the diameter direction of the connecting shaft (6). By adjusting the position of the sealing element (5) relative to the base (8), the sealing gasket (502) is always rotated to a sealed state in a posture that is in contact with the ground.

3. The air-raid shelter door locking device with a sealing linkage structure according to claim 2, characterized in that: An extrusion member (10) is fixed between the two rotating rods (9). The extrusion member (10) cooperates with the base (8) to drive the seal (5) to deflect toward the door leaf (1). The base (8) has a stop pin (801) on its end face, and the outer wall of the rotating rod (9) has a protrusion (902) that cooperates with the stop pin (801). When the rotating rod (9) deflects downward, the protrusion (902) tends to move away from the stop pin (801), so that the seal (5) can deflect downward around the axis of the connecting shaft (6) under its own gravity.

4. The air-raid shelter door locking device with a sealing linkage structure according to claim 3, characterized in that: The base (8) is elastically provided with a locking pin (20) along the diameter direction of the connecting shaft (6). The outer circular surface of the connecting shaft (6) is provided with a pin hole (601) that cooperates with the locking pin (20). When the locking pin (20) is inserted into the pin hole (601), the base (8) and the connecting shaft (6) are locked. The pressing member (10) is provided with a magnetic member (21). When the magnetic member (21) is aligned with the locking pin (20), the magnetic locking pin (20) is pulled out of the pin hole (601), thereby unlocking the base (8) and the connecting shaft (6).

5. The air-raid shelter door locking device with a sealing linkage structure according to claim 4, characterized in that: During the process of the rotating rod (9) rotating relative to the base (8) to unlock the base (8) and the connecting shaft (6), the rotating rod (9) drives the seal (5) to move relative to the base (8) via the gear set.

6. A locking device for a civil defense door with a sealing linkage structure according to claim 5, characterized in that: The gear set includes a rack (18) embedded in the inner wall of the seal (5). The base (8) is provided with a rotating shaft (11). A gear (13) and a worm gear (19) are fixed on the rotating shaft (11). The gear (13) meshes with the rack (18). A worm (12) meshes with the worm gear (19). A bevel gear (15) is provided at one end of the worm (12). The bevel gear (15) can drive the worm (12) to rotate synchronously or rotate relative to the worm (12). A bevel rack (14) meshes with the bevel gear (15) and rotates synchronously with the rotating rod (9). When the base (8) is locked with the connecting shaft (6) and the rotating rod (9) drives the bevel rack (14) to rotate, the seal (5) can be driven to slide relative to the base (8) through the meshing of the bevel rack (14) and the bevel gear (15).

7. The air-raid shelter door locking device with a sealing linkage structure according to claim 1, characterized in that: A pull rod (4) is hinged to the connecting rod (2), and one end of the pull rod (4) near the side of the door leaf (1) is hinged to the door leaf (1).

8. The air-raid shelter door locking device with a sealing linkage structure according to claim 1, characterized in that: The sealing element (5) is a plate-shaped structure with an L-shaped cross-section. When the sealing element (5) is in a sealed state, the sealing gasket (502) can be tightly abutted against the ground and the door leaf (1) side.

9. A locking device for a civil defense door with a sealing linkage structure according to claim 1, characterized in that: The connecting shaft (6) is rotatably engaged with the hinge seat (7) on the side wall of the door leaf (1). A protrusion (602) extends outward along the diameter direction of the connecting shaft (6) on the outer circular surface of the connecting shaft (6). The end face of the hinge seat (7) extends outward along the direction parallel to the axis of the connecting shaft (6) to form a stop (701) that engages with the protrusion (602).

10. A locking device for a civil defense door with a sealing linkage structure according to claim 6, characterized in that: A bracket (17) is fitted onto the smooth part of the worm (12), the worm (12) and the bracket (17) are rotatably engaged, and the bracket (17) is fixedly connected to the base (8).

Images