Impact-resistant civil air defense door

Abstract

The anti-impact civil air defense door comprises a door frame, a door body and a supporting mechanism, the door frame is provided with a first square anti-impact groove, a second square anti-impact groove and a third square anti-impact groove, the second square anti-impact groove is defined by the first square anti-impact groove, and the third square anti-impact groove is defined by the second square anti-impact groove; the first anti-impact groove, the second anti-impact groove and the third anti-impact groove are arranged in a step shape; the door body is hinged to the door frame, the door body is provided with a first frame body, a second frame body and a third frame body, the second frame body is surrounded by the first frame body, the third frame body is surrounded by the second frame body, and the first frame body, the second frame body and the third frame body are arranged in a step shape so as to be inserted into the first anti-impact groove, the second anti-impact groove and the third anti-impact groove correspondingly; the supporting mechanism comprises a bearing body, a rotating part, rolling wheels and a supporting body, the bearing body is fixedly connected with the surface, away from the door frame, of the door body, one end of the rotating part penetrates into the bearing body, and the rolling wheels and the supporting body are movably connected with the inner wall of the bearing body.

Description

Technical Field

[0001] The present invention relates to the field of civil defense door technology, and more particularly to an impact-resistant civil defense door. Background Art

[0002] Civil air defense is the measures and actions taken by the government to mobilize and organize the people to guard against enemy air attacks and eliminate future troubles. It, together with key point air defense and field air defense, constitutes the national air defense system. It is an important part of modern national defense, an important aspect of national economic and social development, an important part of modern urban construction, and a social welfare undertaking that benefits the country and the people. Civil air defense doors are the entrances and exits of civil defense projects. Simply put, they are doors with protective functions when people enter areas with protective measures during wars, earthquakes and other natural disasters. Today's civil air defense safety doors are mostly used at the entrances and exits of shopping malls, hospitals, warehouses, underground parking lots, etc.

[0003] The classification of civil air defense doors is quite distinct. Ordinary single-leaf protective doors are made of a simple layer of thick steel plate, which have poor impact resistance and airtightness. They rely on hinge pivots for support, and the hinges can be easily deformed by the heavy weight of the civil air defense door after long-term use. Summary of the invention

[0004] The present application provides an impact-resistant civil defense door that can unload external impact force layer by layer, effectively disperse and absorb the impact force, reduce the possibility of the door body being directly damaged by strong impact, and increase the sealing of the civil defense door to prevent the intrusion of external harmful substances or gases, and reduce the pressure of the three door bodies on the hinge between the first door body and the door frame.

[0005] In the first aspect, the present application provides an impact-resistant civil defense door, including a door frame, a door body and a supporting mechanism, the door frame is provided with a first impact-resistant groove, a second impact-resistant groove and a third impact-resistant groove in a mouth shape, the first impact-resistant groove encloses the second impact-resistant groove, the second impact-resistant groove encloses the third impact-resistant groove, and the first impact-resistant groove, the second impact-resistant groove and the third impact-resistant groove are arranged in a stepped manner; the door body is hinged to the door frame, the door body is provided with a first frame body, a second frame body and a third frame body, the first frame body encloses the second frame body, the second The frame encloses the third frame, and the first frame, the second frame and the third frame are arranged in a stepped manner so that they can be inserted into the first anti-impact groove, the second anti-impact groove and the third anti-impact groove respectively; the supporting mechanism includes a load-bearing body, a rotating part, a rolling wheel and a supporting body, the load-bearing body is fixedly connected to the surface of the door body away from the door frame, one end of the rotating part is passed through the interior of the load-bearing body, and the rolling wheel and the supporting body are movably connected to the inner wall of the load-bearing body and connected to the rotating part, so that when the rotating part is rotated, the supporting body and the rolling wheel can be alternately extended out of the load-bearing body.

[0006] In some embodiments, the door body includes a first door body, a second door body and a third door body; the first door body is hinged to the door frame, the first door body includes a first impact-resistant body and the first frame body, the first frame body is fixedly connected to the first impact-resistant body, and the first impact-resistant body and the first frame body together form a first placement groove; the second door body is arranged in the first placement groove and is fixedly connected to the first impact-resistant body, the second door body includes a second impact-resistant body and the second frame body fixedly connected to each other, and the second impact-resistant body and the second frame body together form a second placement groove; the third door body is arranged in the second placement groove and is fixedly connected to the second impact-resistant body, and the third door body includes a second impact-resistant body and the second frame body fixedly connected to each other. The locking mechanism comprises a lock body, two mounting seats, a first locking handle and a transmission structure; the lock body is fixedly connected to the third impact-resistant body, and two ends of the lock body are respectively movably penetrated with a first locking rod and a second locking rod; the two mounting seats are connected to the third impact-resistant body, and one end of the two mounting seats away from the third door body is respectively provided with a first through hole and a second through hole, one end of the first locking rod away from the lock body passes through the first through hole, and the other end of the second locking rod away from the lock body passes through the second through hole; the first locking handle is rotatably penetrated through the lock body; the transmission structure is arranged in the lock body, and the transmission structure connects the first locking rod, the second locking rod and the first locking handle, so that the first locking rod and the second locking rod can be movably penetrated when the first locking handle is rotated. The locking rod moves in a vertical direction; the transmission structure includes two mounting bodies, a first driven bevel gear, a second driven bevel gear and an active bevel gear; the two mounting bodies are fixedly connected to the inner wall of the lock body, and the inner walls of the two mounting bodies are rotatably connected with the first driving column and the second driving column respectively, the first driving column is threadedly connected to the first locking rod, and the second driving column is threadedly connected to the second locking rod; the first driven bevel gear is fixedly connected to the first driving column; the second driven bevel gear is fixedly connected to the second driving column; the active bevel gear is arranged on the first lock handle and meshes with the first driven bevel gear and the second driven bevel gear; the impact-resistant civil defense door also includes a stopping mechanism, which includes a second lock handle and a rotating member; the second lock handle includes a lock handle body, a lock column and a lock block, one end of the lock handle body is fixedly connected to the lock column, and the lock column is rotatably connected to the first The lock column passes through the first door body, the second door body and the third door body in sequence and penetrates into the lock body and is fixedly connected to the second lock handle. The other end of the lock handle body is fixedly connected to the lock block, and the extension direction of the lock block is parallel to the extension direction of the lock column. A rotating member is rotatably connected to the third door body. The rotating member passes through the third door body, the second door body and the first door body in sequence. Two limit plates are arranged at one end of the rotating member. The rotating member has a locking position and an unlocking position in its rotation stroke. In the locking position, one of the two limit plates is located directly above the lock block, and the other of the two limit plates is located directly below the lock block, so as to limit the lock block between the two limit plates. In the unlocking position, the two limit plates are spaced apart in the horizontal direction so that the lock block can pass between the two limit plates.The inner wall of the lock body is fixedly connected with a mounting plate, the mounting plate is provided with a through hole, the inner wall of the through hole is rotatably connected with a fixed cylinder, one end of the fixed cylinder is fixedly connected with the active bevel gear, the first lock handle passes through the active bevel gear and the fixed cylinder in sequence, the part of the first lock handle that penetrates the fixed cylinder is fixedly connected with a plurality of square blocks, the inner wall of the fixed cylinder is provided with a plurality of slide grooves, and the square blocks can be inserted into the slide grooves. ;

[0007] In some of the embodiments, a fixing seat is fixedly connected to the third anti-impact body, and the fixing seat is provided with a strip hole extending along the width direction of the third anti-impact body; a movable pull piece is rotatably installed on the door frame, one end of the movable pull piece is movably inserted into the strip hole and is provided with a blocking piece abutting against the lower surface of the fixed seat; the first anti-impact body comprises a first anti-impact plate, a first joint piece, a first buffer capsule and a first heat insulation board, the first joint piece is U-shaped, the first anti-impact plate and the first joint piece are fixedly connected and form a first placement groove, the first buffer capsule is arranged in the first placement groove, and the first heat insulation board is fixedly connected to the surface of the first joint piece away from the first anti-impact plate; the second anti-impact body comprises a second anti-impact plate, a second joint piece, a second buffer capsule and a second heat insulation board, the second joint piece is U-shaped, and the second The anti-impact plate and the second joint are fixedly connected and form a second placement groove, the second buffer capsule is arranged in the second placement groove, and the second heat insulation board is fixedly connected to the surface of the second joint away from the second anti-impact plate; the third anti-impact body includes a third anti-impact plate, a third joint, a third buffer capsule and a third heat insulation board, the third joint is U-shaped, the third anti-impact plate and the third joint are fixedly connected and form a third placement groove, the third buffer capsule is arranged in the third placement groove, and the third heat insulation board is fixedly connected to the surface of the third joint away from the third anti-impact plate; the interiors of the first buffer capsule, the second buffer capsule and the third buffer capsule are all filled with magnetorheological fluid, and the door frame is provided with a first magnet, a second magnet and a third magnet that can correspond to the first buffer capsule, the second buffer capsule and the third buffer capsule respectively.

[0008] In some embodiments, the supporting mechanism further includes a first transverse groove, a second transverse groove, a first pushing block, a second pushing block, two first vertical grooves, a second vertical groove, a third vertical groove and a fourth vertical groove, the first transverse groove being arranged inside the load-bearing body, and the inner wall of the first transverse groove being threadedly connected to one end of the rotating member; the second transverse groove being arranged inside the load-bearing body and being connected to the first transverse groove; the first pushing block being movably arranged in the second transverse groove, one end of the first pushing block being fixedly connected to a pushing ball, and the other end abutting against one end of the rotating member, a first accommodating groove being arranged in the first pushing block, and the first accommodating groove having a first inclined inner wall; the second pushing block being movably arranged in the second transverse groove, one end of the second pushing block being fixedly connected to the first elastic member, the first elastic member being fixedly connected to the inner wall of the second transverse groove, the other end of the second pushing block being fixedly connected to the pushing ball, a second accommodating groove being arranged in the second pushing block, and the second accommodating groove having a second inclined The cam is an assembly made of two members, each of which is connected to a pair of opposite ends of the cam, and the two members are connected in a two-way manner so that the cam can extend to a position responsive to the wearer's movement.

[0009] Based on the impact-resistant civil air defense door of the embodiment of the present application, multiple buffers can be formed by combining the first frame, the second frame and the third frame with the first impact-resistant groove, the second impact-resistant groove and the third impact-resistant groove distributed in a stepped manner, and the external impact force can be unloaded layer by layer, effectively dispersing and absorbing the impact force, and preventing the door body from being directly damaged by strong impact. In this way, the structural stability of the civil air defense door is not only enhanced, but also its protective performance under extreme conditions is improved, ensuring the safety of personnel. At the same time, the frame and the impact-resistant groove combined layer by layer can also increase the sealing of the civil air defense door, prevent the invasion of external harmful substances or gases, and further improve the safety performance of the civil air defense door. The inner groove walls of the first impact-resistant groove, the second impact-resistant groove and the third impact-resistant groove located at the top part of the door frame are respectively in contact with the surfaces of the first frame, the second frame and the third frame, which can form support for the first door body, the second door body and the third door body, thereby reducing the pressure of the three door bodies on the hinge between the first door body and the door frame. By arranging rolling wheels and supporting bodies so that the rolling wheels and supporting bodies are alternately extended and contact the ground, support can be provided for the first door body, the second door body and the third door body when the civil air defense door is in the open state, the closing process, the closed state and the opening process, thereby further reducing the pressure of the three door bodies on the hinge between the first door body and the door frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0011] Figure 1 This is a schematic diagram of the three-dimensional structure of the impact-resistant civil air defense door of this application when it is in an open state;

[0012] Figure 2 for Figure 1 The enlarged structural diagram of the middle A part;

[0013] Figure 3 for Figure 1 A schematic diagram of the enlarged structure of the middle B part;

[0014] Figure 4 This is a schematic diagram of the three-dimensional structure of the impact-resistant civil air defense door of this application when it is in an open state from another perspective;

[0015] Figure 5 This is a schematic diagram of the structure when the impact-resistant civil air defense door of this application is in an open state, viewed from above;

[0016] Figure 6 This is a schematic diagram of the structure of the impact-resistant civil air defense door in the closed state of this application;

[0017] Figure 7 This is a schematic diagram of the structure when the impact-resistant civil air defense door of this application is in the open state when viewed from above;

[0018] Figure 8 This is a schematic diagram of the top view of the structure of the impact-resistant civil air defense door in the closed state of this application;

[0019] Fig. 9 This is a schematic diagram of the three-dimensional structure of the first door body, the second door body and the third door body of the present application;

[0020] Fig.10 for Fig. 9 Schematic diagram of the exploded structure of the first door body, the second door body and the third door body;

[0021] Fig.11 for Fig.10 Schematic diagram of explosion decomposition structure of the first impact-resistant body, the second impact-resistant body and the third impact-resistant body;

[0022] Fig.12 This is a schematic diagram of the internal structure of the lock body of this application;

[0023] Fig.13 for Figure 4 Schematic diagram of the internal structure of the middle load-bearing body.

[0024] Description of reference numerals:

[0025] 100, impact-resistant civil defense door; 110, connector; 120, door frame; 121, third impact-resistant groove; 122, movable puller; 1221, blocking member; 123, second impact-resistant groove; 124, first impact-resistant groove; 130, door body; 131, first door body; 1311, first impact-resistant body; 13111, first impact-resistant plate; 13112, first joint member; 13113, first buffer capsule; 13114, first heat insulation board; 1312, first frame; 132, second door body; 1321, second impact-resistant body; 13211, second impact-resistant board; 13212, second joint piece; 13213, second buffer capsule; 13214, second heat insulation board; 1322, second frame; 133, third door body; 1331, third impact-resistant body; 13311, third impact-resistant board; 13312, third joint piece; 13313, third buffer capsule; 13314, third heat insulation board; 1332, third frame; 134, fixed seat; 140, locking mechanism; 141, lock body; 1411, mounting body; 1412, mounting plate; 142, second lock handle; 1421, lock handle body; 1422, lock column; 143, first lock handle; 1431, square block; 1432, driving bevel gear; 144, first lock rod; 1441, first driving column; 145 , rotating body; 1451, limiting plate; 1452, hexagonal bolt; 146, second locking rod; 150, supporting mechanism; 151, rotating member; 1511, load-bearing body; 152, rolling wheel; 153, supporting body; 154, second transverse groove; 1541, first elastic member; 155, first pushing block; 156, second pushing block; 157, first vertical groove; 158, second vertical groove; 1581, movable member; 159, third vertical groove.

[0026] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] See also Figures 1 to 13The present application proposes an impact-resistant civil defense door 100, comprising a door frame 120, a door body 130 and a supporting mechanism 150, wherein the door frame 120 is provided with a first impact-resistant groove 124, a second impact-resistant groove 123 and a third impact-resistant groove 121 in a mouth shape, wherein the first impact-resistant groove 124 surrounds the second impact-resistant groove 123, wherein the second impact-resistant groove 123 surrounds the third impact-resistant groove 121, and the first impact-resistant groove 124, the second impact-resistant groove 123 and the third impact-resistant groove 121 are arranged in a stepped manner; the door body 130 is hinged to the door frame 120, and the door body 130 is provided with a first frame body 1312, a second frame body 1322 and a third frame body 1332, wherein the first frame body 1312 surrounds the second frame body 1322, wherein the second frame body 1322 surrounds the third The frame body 1332 is surrounded inside, and the first frame body 1312, the second frame body 1322 and the third frame body 1332 are arranged in a stepped manner so as to be able to insert the first anti-impact groove 124, the second anti-impact groove 123 and the third anti-impact groove 121 respectively; the supporting mechanism 150 includes a load-bearing body 1511, a rotating member 151, a rolling wheel 152 and a supporting body 153, the load-bearing body 1511 is fixedly connected to the surface of the door body 130 away from the door frame 120, one end of the rotating member 151 is penetrated into the interior of the load-bearing body 1511, and the rolling wheel 152 and the supporting body 153 are both movably connected to the inner wall of the load-bearing body 1511 and connected to the rotating member 151, so that when the rotating member 151 is rotated, the supporting body 153 and the rolling wheel 152 can be alternately extended out of the load-bearing body 1511.

[0029] In the embodiment provided by the present application, the first frame 1312 can be matched with the first anti-shock groove, the second frame 1322 can be matched with the second anti-shock groove 123, and the third frame 1332 can be matched with the third anti-shock groove 124121. When the civil air defense door is closed, the first frame 1312 will be inserted into the first anti-shock groove, the second frame 1322 will be inserted into the second anti-shock groove 123, and the third frame 1332 will be inserted into the third anti-shock groove 124121. The three anti-shock grooves are distributed in steps, so that the frame and the anti-shock groove are combined layer by layer. When the civil air defense door is subjected to external impact, the first frame 1312, the second frame 1322 and the third frame 1332 are combined with the first anti-shock groove, the second anti-shock groove 123 and the third anti-shock groove 124121 distributed in a stepped manner to form multiple buffers, and unload the external impact force layer by layer, effectively disperse and absorb the impact force, and prevent the door body from being directly damaged by strong impact. This not only enhances the structural stability of the civil air defense door, but also improves its protective performance under extreme conditions, ensuring the safety of personnel. At the same time, the layered frame and impact-resistant grooves can also increase the sealing of the civil air defense door, preventing the intrusion of external harmful substances or gases, further improving the safety performance of the civil air defense door.

[0030] A support mechanism 150 is provided, and when the civil air defense door is in an open state, the support body 153 contacts the ground to support the door body. By rotating the rotating member 151 in the forward direction, the support body 153 can enter the load-bearing body, and the roller can extend and contact the ground, so that the roller can support the door body in the process of closing the door body. After closing the door, the rotating member 151 is rotated in the reverse direction, so that the support body 153 extends out of the load-bearing body and contacts the ground, so that the roller is separated from the ground, and then supports the door body when the door body is closed. In this way, the door body can be supported when the door body is in an open state, a closing process, a closing state, and an opening process, which can further reduce the pressure at the hinge between the door body and the door frame.

[0031] Among them, the door body 130 may include a first door body 131, a second door body 132 and a third door body 133; the first door body 131 is hinged to the door frame 120, the first door body 131 includes a first impact-resistant body 1311 and a first frame body 1312, the first frame body 1312 is fixedly connected to the first impact-resistant body 1311, and the first impact-resistant body 1311 and the first frame body 1312 jointly form a first placement groove; the second door body 132 is arranged in the first placement groove and fixedly connected to the first impact-resistant body 1311, the second door body 132 includes a second impact-resistant body 1321 and a second frame body 1322 fixedly connected to each other, and the second impact-resistant body 1321 and the second frame body 1322 jointly form a second placement groove; the third door body 133 is arranged in the second placement groove and fixedly connected to the second impact-resistant body 1321, the third door body 133 includes a third impact-resistant body 1331 and a third frame body 1332 fixedly connected to each other.

[0032] The first frame body 1312 and the first impact-resistant body 1311 may be integrally formed, the second frame body 1322 and the second impact-resistant body 1321 may be integrally formed, and the third frame body 1332 and the third impact-resistant body 1331 may be integrally formed.

[0033] The second door body 132 is arranged in the first placement groove, and the second impact-resistant body 1321 may be fixedly attached to the surface of the first impact-resistant body 1311. The third door body 133 is arranged in the second placement groove, and the third impact-resistant body 1331 may be fixedly attached to the surface of the second impact-resistant body 1321. The first impact-resistant body 1311, the second impact-resistant body 1321 and the third impact-resistant body 1331 are attached layer by layer, and have multiple impact-resistant effects, further improving the safety performance of the civil air defense door.

[0034] The first door body 131 is hinged to the door frame 120. A plurality of connectors 110 spaced apart along the vertical direction may be provided on the first impact-resistant body 1311, and the plurality of connectors 110 are all arranged in a triangular shape, and the plurality of connectors 110 are all hinged to the door frame 120. The triangularly arranged connectors 110 can improve the structural strength of the connectors 110, strengthen the bearing capacity of the connectors 110, and reduce the possibility of being deformed by the first door body 131.

[0035] After the first frame 1312 is inserted into the first anti-shock groove, the inner groove wall of the first anti-shock groove located at the top part of the door frame 120 contacts the surface of the first frame 1312 and supports the first frame 1312, thereby supporting the first door body 131. After the second frame 1322 is inserted into the second anti-shock groove 123, the inner groove wall of the second anti-shock groove 123 located at the top part of the door frame 120 contacts the surface of the second frame 1322 and supports the second frame 1322, thereby supporting the second door body 132. After the third frame 1332 is inserted into the third anti-shock groove 124121, the inner groove wall of the third anti-shock groove 124121 located at the top part of the door frame 120 contacts the surface of the third frame 1332 and supports the third frame 1332, thereby supporting the third door body 133. In this way, the first anti-shock groove, the second anti-shock groove 123 and the third anti-shock groove 124121 can support the first door body 131, the second door body 132 and the third door body 133 layer by layer, which can reduce the pressure of the first door body 131, the second door body 132 and the third door body 133 on the hinge between the first door body 131 and the door frame 120, and also reduce the pressure of the first door body 131, the second door body 132 and the third door body 133 on the connector 110 and the connector 110 and the door frame 120. The hinge can further prevent the connector 110 or the connector 110 and the door frame 120 from being compressed and deformed.

[0036] The inner groove wall of the first anti-shock groove located at the top part of the door frame 120 extends obliquely upward toward the direction close to the first frame 1312, so that the inner wall of the first anti-shock groove and the first frame 1312 form a triangular structure, which can improve the strength of the first door body 131, and can also prevent the first frame 1312 from sliding out of the first anti-shock groove, thereby improving the anti-shock and supporting effects. The inner groove wall of the second anti-shock groove 123 located at the top part of the door frame 120 extends obliquely upward toward the direction close to the second frame 1322, so that the inner wall of the second anti-shock groove 123 and the second frame 1322 form a triangular structure, which can improve the strength of the second door body 132, and can also prevent the second frame 1322 from sliding out of the second anti-shock groove 123, thereby improving its anti-shock and supporting effects. The inner groove wall of the third anti-impact groove 124 located at the top part of the door frame 120 extends obliquely upward toward the direction close to the third frame 1332, so that the inner wall of the third anti-impact groove 124 and the third frame 1332 form a triangular structure, which can improve the strength of the third door body 133 and prevent the third frame 1332 from sliding out of the third anti-impact groove 124, thereby improving its anti-impact and supporting effects. In this way, the structural strength of the civil air defense door can be further improved, and the anti-impact effect of the civil air defense door can be improved.

[0037] In some embodiments of the present application, a locking mechanism 140 is connected to the surface of the third impact-resistant body 1331 away from the second impact-resistant body 1321, and the locking mechanism 140 includes a lock body 141, two mounting seats, a first lock handle 143 and a transmission structure. The lock body 141 is fixedly connected to the third impact-resistant body 1331, and the two ends of the lock body 141 are respectively movably penetrated with a first lock rod 144 and a second lock rod; the two mounting seats are connected to the third impact-resistant body 1331, and the ends of the two mounting seats away from the third door body 133 are respectively provided with a first through hole and a second through hole, and the end of the first lock rod 144 away from the lock body 141 passes through the first through hole, and the end of the second lock rod away from the lock body 141 passes through the second through hole; the first lock handle 143 is rotatably penetrated in the lock body 141; the transmission structure is arranged in the lock body 141, and the transmission structure connects the first lock rod 144, the second lock rod and the first lock handle 143, so that the first lock rod 144 and the second lock rod can move in the vertical direction when the first lock handle 143 rotates.

[0038] After closing the civil air defense door, the operator rotates the first lock handle 143, and the rotation of the first lock handle 143 causes the transmission structure connected thereto to operate, thereby causing the first lock rod 144 to move upward and abut against the surface of the top of the door frame 120 away from the third door body 133, and causing the second lock rod to move downward and abut against the surface of the bottom of the door frame 120 away from the third door body 133, so that the civil air defense door cannot be opened outward, thereby improving the stability of the civil air defense door in the closed state. When the first lock handle 143 is reversed, the first lock rod 144 and the second lock rod are shortened, so that the first lock rod 144 and the second lock rod are separated from the door frame 120, and the door can be opened outward at this time.

[0039] Further, the transmission structure includes two mounting bodies 1411, a first driven bevel gear, a second driven bevel gear and a driving bevel gear 1432. The two mounting bodies 1411 are fixedly connected to the inner wall of the lock body 141, and the inner walls of the two mounting bodies 1411 are rotatably connected to the first driving column 1441 and the second driving column 1441, respectively. The first driving column 1441 is threadedly connected to the first locking rod 144, and the second driving column is threadedly connected to the second locking rod 146. The first driven bevel gear is fixedly connected to the first driving column 1441; the second driven bevel gear is fixedly connected to the second driving column; the driving bevel gear 1432 is arranged on the first locking handle 143 and meshes with the first driven bevel gear and the second driven bevel gear.

[0040] After the first locking handle 143 is rotated, the driving gear rotates and meshes with the first driven bevel gear and the second driven bevel gear, so that the first driving column 1441 and the second driving column also rotate. The first driving column 1441 and the second driving column are both provided with internal threads, and the outer surfaces of the first locking rod 144 and the second locking rod are provided with external threads that match the internal threads. When the first driving column 1441 and the second driving column rotate, the first locking rod 144 and the second locking rod will be deeply locked in the main body 141. Among them, the rotation direction of the internal thread of the first driving column 1441 and the internal thread of the second driving column can be opposite.

[0041] Furthermore, the inner wall of the lock body 141 is fixedly connected with a mounting plate 1412, the mounting plate 1412 is provided with a through hole, the inner wall of the through hole is rotatably connected with a fixed cylinder, one end of the fixed cylinder is fixedly connected with an active bevel gear 1432, and the first lock handle 143 passes through the active bevel gear 1432 and the fixed cylinder in sequence. The part of the first lock handle 143 that penetrates the fixed cylinder is fixedly connected with a plurality of square blocks 1431, and the inner wall of the fixed cylinder is provided with a plurality of slide grooves, and the square blocks 1431 can be inserted into the slide grooves.

[0042] When the first lock handle 143 is pushed to gradually approach the third anti-impact body 1331, the square block 1431 will be out of the slide slot. In this way, when the civil air defense door is in the open state, pushing the first lock handle 143 close to the third anti-impact body 1331 can not only reduce the possibility of vehicles and pedestrians colliding with the first lock handle 143, but also prevent the first lock handle 143 from rotating due to accidental collision, causing the first lock rod 144 and the second lock rod to extend, thereby hindering the smooth closing of the civil air defense door. After closing the civil air defense door, the first lock handle 143 is pulled outward to make the square block 1431 enter the slide slot. In this way, when the first lock handle 143 rotates, the square block 1431 drives the fixed cylinder to rotate, thereby rotating the active bevel gear 1432, and the rotation of the active bevel gear 1432 can achieve the extension of the first lock rod 144 and the second lock rod.

[0043] In some embodiments of the present application, the impact-resistant civil defense door 100 further includes a stop mechanism, which includes a second lock handle 142 and a rotating member. The second lock handle 142 includes a lock handle body 1421, a lock column 1422 and a lock block, one end of the lock handle body 1421 is fixedly connected to the lock column 1422, the lock column 1422 is rotatably connected to the first door body 131, the lock column 1422 sequentially passes through the first door body 131, the second door body 132 and the third door body 133 and penetrates into the lock body 141 and is fixedly connected to the second lock handle 142, the other end of the lock handle body 1421 is fixedly connected to the lock block, and the extension direction of the lock block is parallel to the extension direction of the lock column 1422. A rotating member is rotatably connected to the third door body 133. The rotating member passes through the third door body 133, the second door body 132 and the first door body 131 in sequence. Two limit plates 1451 are provided at one end of the rotating member. The rotating member has a locking position and an unlocking position in its rotation stroke. In the locking position, one of the two limit plates 1451 is located directly above the locking block, and the other of the two limit plates 1451 is located directly below the locking block to limit the locking block between the two limit plates 1451. In the unlocking position, the two limit plates 1451 are spaced apart in the horizontal direction so that the locking block can pass between the two limit plates 1451.

[0044] When the civil air defense door is closed, the rotating part is rotated to the unlocking position, and the first locking handle 143 is rotated to extend the first locking rod 144 and the second locking rod. During the rotation of the first locking handle 143, the second locking handle 142 is rotated, and the locking block is moved between the two limit plates 1451, and then the rotating part is rotated from the unlocking position to the locking position. In this way, the rotation of the first locking handle 143 can be limited, so that the civil air defense door cannot be opened outward, which can effectively prevent unauthorized personnel from opening the civil air defense door, enhance the safety protection capability of the civil air defense door, and further ensure the stability and sealing of the civil air defense door in the closed state, which not only improves the safety of use of the civil air defense door, but also provides a more reliable protection barrier in emergency situations.

[0045] Furthermore, the other end of the rotating member is fixedly connected with a hexagonal bolt 1452. By providing the hexagonal bolt 1452, the rotating member cannot be easily rotated after the civil air defense door is closed, and the stability of the civil air defense door is further improved. When the civil air defense door needs to be opened, the hexagonal bolt 1452 can be rotated with a wrench, thereby rotating the rotating member to the unlocked position.

[0046] In some embodiments of the present application, a fixing seat 134 is fixedly connected to the third impact-resistant body 1331, and the fixing seat 134 is provided with a strip hole extending along the width direction of the third impact-resistant body 1331. A movable pull piece 122 is rotatably mounted on the door frame 120, and one end of the movable pull piece 122 is movably inserted into the strip hole and provided with a stopper 1221 abutting against the lower surface of the fixing seat 134.

[0047] The thickness direction of the third anti-impact body 1331 is the same as the extension direction of the locking column 1422 , and the width direction of the third anti-impact body 1331 is perpendicular to the thickness direction thereof.

[0048] The abutment member 1221 abuts against the lower surface of the fixing seat 134, which can form an upward support for the fixing seat 134 and the third anti-impact body 1331, and further reduce the pressure of the third door body 133 on the hinge of the first door body 131 and the door frame 120. In addition, since the civil air defense door is very heavy during the process of opening, it cannot be opened too quickly and needs to be opened slowly to prevent the heavy civil air defense door from hitting the operator during the opening process. The cooperation of the fixing seat 134 and the movable pull member 122 can achieve a protective effect.

[0049] It is understandable that by installing a drive motor on the door frame 120, the output shaft of the drive motor is fixedly connected to the other end of the movable pull member 122. When closing the civil air defense door, starting the drive motor can automatically rotate the movable pull member 122, which can assist the operator to smoothly close the civil air defense door.

[0050] In some embodiments of the present application, the first impact-resistant body 1311 includes a first impact-resistant plate 13111, a first coupling member 13112, a first buffer capsule 13113 and a first heat insulation plate 13114. The first coupling member 13112 is arranged in a U shape. The first impact-resistant plate 13111 and the first coupling member 13112 are fixedly connected and form a first placement groove. The first buffer capsule 13113 is arranged in the first placement groove. The first heat insulation plate 13114 is fixedly connected to the first coupling member 13112 away from the surface of the first impact-resistant plate 13111.

[0051] The second anti-impact body 1321 includes a second anti-impact plate 13211, a second connecting piece 13212, a second buffer capsule 13213 and a second heat insulation plate 13214. The second connecting piece 13212 is arranged in a U shape. The second anti-impact plate 13211 and the second connecting piece 13212 are fixedly connected and form a second placement groove. The second buffer capsule 13213 is arranged in the second placement groove. The second heat insulation plate 13214 is fixedly connected to the second connecting piece 13212 away from the surface of the second anti-impact plate 13211.

[0052] The third anti-impact body 1331 includes a third anti-impact plate 13311, a third connecting piece 13312, a third buffer capsule 13313 and a third heat insulation board 13314. The third connecting piece 13312 is arranged in a U shape. The third anti-impact plate 13311 and the third connecting piece 13312 are fixedly connected and form a third placement groove. The third buffer capsule 13313 is arranged in the third placement groove. The third heat insulation board 13314 is fixedly connected to the third connecting piece 13312 away from the surface of the third anti-impact plate 13311.

[0053] The first anti-impact plate 13111, the second anti-impact plate 13211 and the third anti-impact plate 13311 can be made of stainless steel. By setting the first buffer capsule 13113, the second buffer capsule 13213 and the third buffer capsule 13313, the external impact force can be buffered. The first buffer capsule 13113, the second buffer capsule 13213 and the third buffer capsule 13313 can be filled with sand to form a multiple buffering effect. The first heat insulation board 13114, the second heat insulation board 13214 and the third heat insulation board 13314 are filled with fireproof rock wool, which can effectively isolate the transfer of heat in high temperature environments such as fires, and can significantly improve the impact resistance and fireproof and heat insulation performance of the civil air defense door.

[0054] Furthermore, the interiors of the first buffer capsule 13113, the second buffer capsule 13213 and the third buffer capsule 13313 are all filled with magnetorheological fluid, and the door frame 120 is provided with a first magnet, a second magnet and a third magnet that can correspond to the first buffer capsule 13113, the second buffer capsule 13213 and the third buffer capsule 13313 respectively.

[0055] When the civil defense door is closed, the magnetorheological fluid in the first buffer capsule 13113, the second buffer capsule 13213 and the third buffer capsule 13313 will approach the corresponding first magnet, the second magnet and the third magnet and change from liquid to solid. In this way, the impact resistance of the first buffer capsule 13113, the second buffer capsule 13213 and the third buffer capsule 13313 can be improved.

[0056] In some embodiments of the present application, the support mechanism 150 further includes a first transverse groove, a second transverse groove 154, a first push block 155, a second push block 156, two first vertical grooves 157, a second vertical groove 158, a third vertical groove and a fourth vertical groove, wherein the first transverse groove is arranged inside the load-bearing body, and the inner wall of the first transverse groove is threadedly connected to one end of the rotating member 151; the second transverse groove 154 is arranged inside the load-bearing body and is connected to the first transverse groove; the first push block 155 is movably arranged in the second transverse groove 154, and one end of the first push block 155 is fixedly connected to the rotating member 151. It is connected to a pushing ball, and the other end abuts against one end of the rotating member 151. The first pushing block 155 is provided with a first accommodating groove, and the first accommodating groove has a first inclined inner wall; the second pushing block 156 is movably arranged in the second transverse groove 154, and one end of the second pushing block 156 is fixedly connected to the first elastic member 1541, and the first elastic member 1541 is fixedly connected to the inner wall of the second transverse groove 154, and the other end of the second pushing block 156 is fixedly connected to the pushing ball, and the second pushing block 156 is provided with a second accommodating groove, and the second accommodating groove has a second inclined inner wall.

[0057] The two first vertical grooves 157 are arranged in the load-bearing body and are connected to the second transverse groove 154; the second vertical groove 158 is arranged in the load-bearing body and is connected to the second transverse groove 154 and the two first vertical grooves 157. The inner wall of the second vertical groove 158 is slidably connected to the support body 153. One end of the support body 153 is fixedly connected to two load-bearing plugs. The two load-bearing plugs are slidably connected to the two first vertical grooves 157 respectively. The ends of the two load-bearing plugs away from the support body 153 are inclined. The two load-bearing plugs are both sleeved with a second elastic member. The two ends of the second elastic member The ends are respectively fixedly connected to the support body 153 and the inner walls of the second vertical groove 158; the third vertical groove is arranged in the support body 153 and connected to the second vertical groove 158; the fourth vertical groove is arranged in the load-bearing body and connected to the second transverse groove 154 and the second vertical groove 158, and the inner wall of the fourth vertical groove is slidably connected with a movable part 1581, one end of the movable part 1581 is inclined, and the other end can be extended into the third vertical groove, the movable part 1581 is sleeved with a third elastic part, and the two ends of the third elastic part are respectively fixedly connected to the movable part 1581 and the support body 153.

[0058] When the civil air defense door is in the open state, the support body 153 extends out of the load-bearing body and contacts the ground to support the first door body, the second door body and the third door body, and the roller is located in the third vertical groove and does not contact the ground. The support of the support body 153 and the load-bearing plug can further reduce the pressure of the first door body, the second door body and the third door body on the hinge, prevent the hinge from deforming, and increase the service life of the civil air defense door.

[0059] When the civil air defense door is to be closed, the rotating member 151 is rotated forward, and the rotating member 151 will move into the second transverse groove 154 and push the first pushing block 155 to move. The movement of the pushing ball will cause the movable member 1581 abutting against it to move downward. As the rotating member 151 moves forward, the two load-bearing inserts will be inserted upward into the first accommodating groove and the second accommodating groove respectively under the action of the second elastic member, thereby causing the support body 153 to move upward into the load-bearing body. The movable member 1581, pushed by the pushing ball, causes the roller to extend downward and contact the ground. In this way, during the closing process of the door body, the roller can not only support the door body to prevent the door body from being compressed and deformed at the hinge during the closing process, but also easily and conveniently close the civil air defense door.

[0060] When the door body is closed, the rotating member 151 is rotated in the opposite direction so that the rotating member 151 is pulled outward, and the second push block 156 and the first push block 155 will move in the opposite direction under the action of the first elastic member 1541. In this process, the two load-bearing plugs will move downward out of the first receiving groove and the second receiving groove under the action of the first inclined inner wall and the second inclined inner wall, so that the support body 153 extends out of the load-bearing body, and can still support the first door body, the second door body and the third door body when the door is closed. The roller will return to the third vertical groove under the action of the third elastic member.

[0061] The roller does not touch the ground when the door body is open or closed, and only extends out to touch the ground during the process of closing and opening the door body, which can prevent the roller from being deformed by long-term pressure and improve the service life of the roller. The second elastic member and the third elastic member can form a buffer for the inclined end of the load-bearing plug and the movable member 1581, preventing the load-bearing plug from being deformed and damaged due to rigid collision in the first vertical groove 157, and preventing the movable member 1581 from being deformed and damaged due to rigid collision in the second horizontal groove 154.

[0062] Working principle: During use, when the civil defense door is closed, the first frame 1312 will be inserted into the first anti-impact groove, the second frame 1322 will be inserted into the second anti-impact groove 123, and the third frame 1332 will be inserted into the third anti-impact groove 124121. When the civil defense door is subjected to external impact, the first frame 1312, the second frame 1322 and the third frame 1332 are combined with the stepped first anti-impact groove 123 and the third anti-impact groove 124121 layer by layer to form multiple buffers and unload the external impact force layer by layer. After closing the civil air defense door, the rotating member is rotated to the unlocking position, and the first lock handle 143 is rotated to make the first lock rod 144 and the second lock rod extend and abut against the surface of the door frame 120 away from the third door body 133. During the rotation of the first lock handle 143, the second lock handle 142 is rotated, and the lock block is moved between the two limit plates 1451, and then the rotating member is rotated from the unlocking position to the locking position, so that the rotation of the first lock handle 143 can be limited, and the safety protection capability of the civil air defense door and the stability and sealing of the civil air defense door in the closed state can be enhanced. The rotating member 151 is rotated forward, and the support body 153 can be made to enter the load-bearing body, and the roller can be extended and contact the ground, so that the roller can support the door body in the process of closing the door body. When the door is closed, the rotating member 151 is rotated in the reverse direction, so that the support body 153 is extended from the load-bearing body and contacts the ground, so that the roller is separated from the ground, and then supports the door body when the door body is closed.

[0063] The same or similar numbers in the drawings of this embodiment correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0064] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An impact-resistant civil defense door (100), characterized in that: include: The door frame (120) is provided with a first anti-shock groove (124), a second anti-shock groove (123) and a third anti-shock groove (124) in a mouth shape, wherein the first anti-shock groove (124) encloses the second anti-shock groove (123), and the second anti-shock groove (123) encloses the third anti-shock groove (124), and the first anti-shock groove (124), the second anti-shock groove (123) and the third anti-shock groove (124) are arranged in a stepped manner; A door body (130) is hinged to the door frame (120), the door body (130) is provided with a first frame body (1312), a second frame body (1322) and a third frame body (1332), the first frame body (1312) surrounds the second frame body (1322), the second frame body (1322) surrounds the third frame body (1332), and the first frame body (1312), the second frame body (1322) and the third frame body (1332) are arranged in a stepped manner so as to be able to be inserted into the first anti-shock groove (125), the second anti-shock groove (123) and the third anti-shock groove (124), respectively; and, The support mechanism (150) comprises a load-bearing body (1511), a rotating member (151), a rolling wheel (152) and a support body (153); the load-bearing body (1511) is fixedly connected to the surface of the door body (130) away from the door frame; one end of the rotating member (151) is passed through the interior of the load-bearing body (1511); the rolling wheel (152) and the support body (153) are both movably connected to the inner wall of the load-bearing body (1511) and connected to the rotating member (151), so that when the rotating member (151) is rotated, the support body (153) and the rolling wheel (152) can be alternately extended out of the load-bearing body (1511).

2. The impact-resistant civil defense door (100) according to claim 1, characterized in that: The door body (130) comprises: A first door body (131) is hinged to the door frame (120), the first door body (131) comprises a first impact-resistant body (1311) and the first frame body (1312), the first frame body (1312) is fixedly connected to the first impact-resistant body (1311), and the first impact-resistant body (1311) and the first frame body (1312) jointly form a first placement groove; a second door body (132) disposed in the first placement groove and fixedly connected to the first impact-resistant body (1311); the second door body (132) comprises a second impact-resistant body (1321) and a second frame body (1322) fixedly connected to each other; the second impact-resistant body (1321) and the second frame body (1322) jointly form a second placement groove; and The third door body (133) is arranged in the second placement groove and fixedly connected to the second impact-resistant body (1321). The third door body (133) includes a third impact-resistant body (1331) and the third frame body (1332) which are fixedly connected to each other.

3. The impact-resistant civil defense door (100) according to claim 2, characterized in that: A locking mechanism (140) is connected to a surface of the third impact-resistant body (1331) away from the second impact-resistant body (1321), and the locking mechanism (140) comprises: A lock body (141) is fixedly connected to the third impact-resistant body (1331), and a first lock rod (144) and a second lock rod are movably provided at both ends of the lock body (141); Two mounting seats are connected to the third impact-resistant body (1331), and the ends of the two mounting seats away from the third door body (133) are respectively provided with a first through hole and a second through hole, and the end of the first locking rod (144) away from the lock body (141) passes through the first through hole, and the end of the second locking rod away from the lock body (141) passes through the second through hole; A first lock handle (143) is rotatably inserted into the lock body (141); and A transmission structure is arranged in the lock body (141), and the transmission structure connects the first locking rod (144), the second locking rod and the first locking handle (143), so that the first locking rod (144) and the second locking rod can move in a vertical direction when the first locking handle (143) rotates.

4. The impact-resistant civil defense door (100) according to claim 3 is characterized in that: The transmission structure comprises: Two mounting bodies (1411) are fixedly connected to the inner wall of the lock body (141); the inner walls of the two mounting bodies (1411) are rotatably connected to a first driving column (1441) and a second driving column, respectively; the first driving column (1441) is threadedly connected to the first locking rod (144); and the second driving column is threadedly connected to the second locking rod; A first driven bevel gear fixedly connected to the first driving column (1441); A second driven bevel gear fixedly connected to the second driving column; and A driving bevel gear (1432) is provided on the first locking handle (143) and meshes with the first driven bevel gear and the second driven bevel gear.

5. The impact-resistant civil defense door (100) according to claim 3, characterized in that: The impact-resistant civil defense door (100) further comprises a stop mechanism, wherein the stop mechanism comprises: The second lock handle (142) comprises a lock handle body (1421), a lock column (1422) and a lock block, one end of the lock handle body (1421) is fixedly connected to the lock column (1422), the lock column (1422) is rotatably connected to the first door body (131), the lock column (1422) sequentially passes through the first door body (131), the second door body (132) and the third door body (133) and penetrates into the lock body (141) to be fixedly connected to the second lock handle (142), the other end of the lock handle body (1421) is fixedly connected to the lock block, and the extension direction of the lock block is parallel to the extension direction of the lock column (1422); and, A rotating member is rotatably connected to the third door body (133), and the rotating member passes through the third door body (133), the second door body (132) and the first door body (131) in sequence. Two limit plates (1451) are provided at one end of the rotating member. The rotating member has a locking position and an unlocking position in its rotation stroke. In the locking position, one of the two limit plates (1451) is located directly above the locking block, and the other of the two limit plates (1451) is located directly below the locking block to limit the locking block between the two limit plates (1451). In the unlocking position, the two limit plates (1451) are spaced apart in the horizontal direction so that the locking block can pass between the two limit plates (1451).

6. The impact-resistant civil defense door (100) according to claim 2, characterized in that: A fixing seat (134) is fixedly connected to the third impact-resistant body (1331), and the fixing seat (134) is provided with a strip-shaped hole extending along the width direction of the third impact-resistant body (1331); A movable pull piece (122) is rotatably mounted on the door frame (120), one end of the movable pull piece (122) is movably inserted into the strip hole and is provided with a stopper (1221) that abuts against the lower surface of the fixing seat (134).

7. The impact-resistant civil defense door (100) according to claim 2, characterized in that: The first impact-resistant body (1311) comprises a first impact-resistant plate (13111), a first joint piece (13112), a first buffer capsule (13113) and a first heat-insulating plate (13114); the first joint piece (13112) is arranged in a U shape; the first impact-resistant plate (13111) and the first joint piece (13112) are fixedly connected and form a first placement groove; the first buffer capsule (13113) is arranged in the first placement groove; and the first heat-insulating plate (13114) is fixedly connected to a surface of the first joint piece (13112) away from the first impact-resistant plate (13111); The second impact-resistant body (1321) comprises a second impact-resistant plate (13211), a second joint piece (13212), a second buffer capsule (13213) and a second heat-insulating plate (13214); the second joint piece (13212) is arranged in a U shape; the second impact-resistant plate (13211) and the second joint piece (13212) are fixedly connected and form a second placement groove; the second buffer capsule (13213) is arranged in the second placement groove; and the second heat-insulating plate (13214) is fixedly connected to a surface of the second joint piece (13212) away from the second impact-resistant plate (13211); The third impact-resistant body (1331) includes a third impact-resistant plate (13311), a third joint piece (13312), a third buffer capsule (13313) and a third heat insulation board (13314); the third joint piece (13312) is arranged in a U shape; the third impact-resistant plate (13311) and the third joint piece (13312) are fixedly connected and form a third placement groove; the third buffer capsule (13313) is arranged in the third placement groove; and the third heat insulation board (13314) is fixedly connected to the surface of the third joint piece (13312) away from the third impact-resistant plate (13311).

8. The impact-resistant civil defense door (100) according to claim 7, characterized in that: The interiors of the first buffer capsule (13113), the second buffer capsule (13213) and the third buffer capsule (13313) are all filled with magnetorheological fluid, and the door frame (120) is provided with a first magnet, a second magnet and a third magnet which can correspond to the first buffer capsule (13113), the second buffer capsule (13213) and the third buffer capsule (13313) respectively.

9. The impact-resistant civil defense door (100) according to claim 4, characterized in that: The inner wall of the lock body (141) is fixedly connected to a mounting plate (1412), the mounting plate (1412) is provided with a through hole, the inner wall of the through hole is rotatably connected to a fixed cylinder, one end of the fixed cylinder is fixedly connected to the active bevel gear (1432), the first locking handle (143) passes through the active bevel gear (1432) and the fixed cylinder in sequence, the part of the first locking handle (143) that penetrates into the fixed cylinder is fixedly connected to a plurality of square blocks (1431), the inner wall of the fixed cylinder is provided with a plurality of sliding grooves, the square blocks (1431) can be inserted into the sliding grooves.

10. The impact-resistant civil defense door (100) according to claim 1, characterized in that: The support mechanism (150) further comprises: A first transverse groove is provided inside the load-bearing body (1511), wherein an inner wall of the first transverse groove is threadedly connected to one end of the rotating member (151); A second transverse groove (154) is disposed inside the load-bearing body (1511) and is in communication with the first transverse groove; A first pushing block (155) is movably disposed in the second transverse groove (154); one end of the first pushing block (155) is fixedly connected to a pushing ball, and the other end abuts against one end of the rotating member (151); a first accommodating groove is disposed in the first pushing block (155), and the first accommodating groove has a first inclined inner wall; A second pushing block (156) is movably disposed in the second transverse groove (154); one end of the second pushing block (156) is fixedly connected to a first elastic member (1541); the first elastic member (1541) is fixedly connected to the inner wall of the second transverse groove (154); the other end of the second pushing block (156) is fixedly connected to the pushing ball; a second accommodating groove is disposed in the second pushing block (156); the second accommodating groove has a second inclined inner wall; Two first vertical grooves (157) are arranged in the load-bearing body (1511) and communicate with the second transverse groove (154); A second vertical groove (158) is arranged in the load-bearing body (1511) and is connected to the second transverse groove (154) and the two first vertical grooves (157); the inner wall of the second vertical groove (158) is slidably connected to the support body (153); one end of the support body (153) is fixedly connected to two load-bearing plugs; the two load-bearing plugs are respectively slidably connected to the two first vertical grooves (157); one end of the two load-bearing plugs away from the support body (153) is inclined; the two load-bearing plugs are both sleeved with a second elastic member; the two ends of the second elastic member are respectively fixedly connected to the support body (153) and the inner wall of the second vertical groove (158); a third vertical groove, disposed in the support body (153) and connected to the second vertical groove (158); and A fourth vertical groove is arranged in the load-bearing body (1511) and is connected to the second transverse groove (154) and the second vertical groove (158); a movable part (1581) is slidably connected to the inner wall of the fourth vertical groove; one end of the movable part (1581) is inclined and the other end can extend into the third vertical groove; the movable part (1581) is sleeved with a third elastic part; and the two ends of the third elastic part are respectively fixedly connected to the movable part (1581) and the support body (153).

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