Movable doorsill of civil air defense door

Abstract

The utility model discloses a movable doorsill of a civil air defense door, which relates to the field of civil air defense doors and comprises a movable doorsill, fixed doorsills are arranged on two sides of the movable doorsill along the length direction, the fixed doorsills are used for supporting the movable doorsill, and the movable doorsill is in sliding connection with the fixed doorsills along the vertical direction. The lower ends of the two fixed thresholds are fixedly provided with the same supporting block, a containing groove is formed in the supporting block, a lifting device is arranged at the bottom of the containing groove and used for driving the movable threshold to move in the vertical direction, and the side, close to the fixed thresholds, of the movable threshold is slidably connected with a protruding block in the transverse direction. The movable threshold is provided with a driving assembly used for driving the protruding block to move in the transverse direction. The portable traffic light has the effect of being convenient to carry and pass.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of civil air defense door, especially to a civil air defense door movable threshold. BACKGROUND

[0002] At present, in the civil air defense door design, the threshold as the key component, its design mainly focuses on meeting the sealing performance and protection requirement. The traditional fixed threshold design, although in the protection and sealing aspect shows good, but in use has brought not small traffic obstacle to the pedestrian and vehicle, this kind of design limits the development of civil air defense door in convenience and practicality, with the continuous development of urban construction, the civil air defense door threshold design is proposed higher requirement.

[0003] The related technology can refer to the Chinese patent with the announcement number CN219773949U, which discloses a civil air defense door movable threshold structure and relates to the technical field of civil air defense door, improves the problem of inconvenient positioning, including ground and door frame, the door frame is fixedly connected to the top of the ground, a pipe hole is formed in the ground, a lower angle steel plate is arranged on the inner side of the door frame, a fixed pipe is fixedly connected to the bottom of the door frame, and the outer wall of the fixed pipe is slidably connected with the inner wall of the pipe hole. A connecting hole is formed in the lower angle steel plate. By inserting the positioning block into the positioning frame, the threshold is positioned, and the plug block is located directly above the insertion slot. Compared with the direct positioning of the insertion slot and the plug block, the insertion slot and the plug block positioning have poor visual angle and are difficult to position successfully at one time. By setting the insertion slot and the plug block, the connection stability and strength between the lower angle steel plate and the door frame can be improved. By setting the locking rod, the insertion rod can be inserted into the inside of the fixed pipe. By setting the first spring, the insertion rod can be reset to separate from the fixed pipe, thereby achieving the disassembly of the threshold.

[0004] For the related technology in the above, when the vehicle needs to enter and exit the civil air defense door, the movable threshold will hinder the vehicle driving and need to be temporarily disassembled. The disassembly process needs to spend a certain amount of time and consume the physical strength of the operator, and it is inconvenient to use. UTILITY MODEL CONTENTS

[0005] In order to improve the convenience of the civil air defense door threshold, the application provides a civil air defense door movable threshold.

[0006] The application provides a civil air defense door movable threshold, which adopts the following technical scheme:

[0007] The utility model provides an activity door sill of civil air defense door, it includes activity door sill, both sides of activity door sill along length direction are equipped with fixed door sill, and fixed door sill is used for supporting activity door sill, and activity door sill is connected with fixed door sill along vertical direction and slides, and the lower end of two fixed door sills is fixed with same support block, and the inside of support block is equipped with accommodating groove, and the bottom of accommodating groove is equipped with lifting device, and lifting device is used for driving activity door sill and moves along vertical direction, and the side of activity door sill close to fixed door sill is connected with lug along horizontal direction and slides, and fixed door sill is equipped with recess, and activity door sill is equipped with drive assembly for driving lug and moves along horizontal direction.

[0008] Through the above technical scheme, the support block connects the two fixed door sills, so that the fixed door sill supports the vertical movement of the activity door sill, the lifting device is placed in the accommodating groove of the support block, and the activity door sill is lifted or lowered by the lifting device, when the activity door sill needs to avoid vehicles or pedestrians, the activity door sill is lowered into the accommodating groove by the lifting device, when the activity door sill needs to be blocked, the activity door sill is lifted by the lifting device, which improves the convenience of using the activity door sill, when the activity door sill is lifted, the lug is inserted into the groove by the drive assembly, which improves the connection stability of the activity door sill and the fixed door sill.

[0009] Optionally, the lifting device includes a pinion, a rack, a motor, and a push block. The motor is located in the accommodating groove and fixedly connected to the support frame. The output shaft of the motor is coaxially fixed with the pinion. The rack is located below the push block and fixedly connected to the push block. The pinion is meshingly connected to the rack. The push block is fixedly connected to the lower end of the activity door sill and slidably connected to the support block along the vertical direction. When the motor is powered off, the rotation of the pinion along the circumference is locked.

[0010] Through the above technical scheme, the motor drives the pinion to rotate, the pinion drives the rack to lift, and the rack drives the push block to lift, thereby achieving the lifting of the activity door sill and improving the convenience of using the activity door sill of the civil air defense door.

[0011] Optionally, the side of the fixed door sill away from the activity door sill is provided with a handle. The fixed door sill is rotatably connected with a rotating rod along the vertical direction. A gear set one is arranged between the handle and the rotating rod. The handle drives the rotating rod to rotate through the gear set one. A connecting rod is coaxially fixed to the side of the pinion away from the motor. A gear set two is arranged between the connecting rod and the rotating rod. The rotating rod drives the connecting rod to rotate through the gear set two.

[0012] Through the above technical scheme, rotating the handle drives the gear set one to rotate, further drives the rotating rod to rotate, and the rotating rod drives the connecting rod to rotate through the gear set two, so that the connecting rod drives the pinion to rotate. When the motor is damaged and the pinion cannot be self-locked, the handle is used to lift the activity door sill, thereby improving the convenience of using the door sill of the civil air defense door.

[0013] Optionally, the movable threshold further comprises an infrared receiver and a remote controller, the infrared receiver is located inside the support block and connected with the motor, the remote controller radiates infrared rays, the infrared receiver is used for receiving the infrared ray signal radiated by the remote controller, and the infrared receiver controls the motor to start or stop after receiving the signal.

[0014] Optionally, the height of the concave hole along the vertical direction is greater than the height of the convex block, a sealing plate is arranged at the lower end of the inner wall of the concave hole, the sealing plate is hingedly connected with the fixed threshold along the vertical direction, the convex block abuts against the sealing plate when entering the concave hole, the sealing plate is inclined from top to bottom and towards the movable threshold when abutting against the convex block, and a torsion spring is arranged inside the sealing plate and used for driving the sealing plate to move towards the movable threshold.

[0015] By adopting the above technical scheme, when the convex block enters the concave hole, the convex block abuts against the sealing plate under the driving of the torsion spring, forming a sealing structure, and when the movable threshold is lowered, the sealing plate is inclined away from the movable threshold, and the convex block moves downward, thereby improving the sealing performance of the movable threshold.

[0016] Optionally, a roller is rotatably connected to the upper end of the sealing plate, and the roller is in rolling connection with the convex block when the convex block is located in the concave hole.

[0017] By adopting the above technical scheme, when the convex block enters the concave hole, the roller at the upper end of the sealing plate abuts against the convex block, thereby reducing the friction between the sealing plate and the convex block, preventing the sealing plate from being stuck to the convex block, and improving the flexibility of the movable threshold.

[0018] Optionally, the driving assembly comprises a positioning block, a pressure rod, a translation plate and a straight plate, the movable threshold is provided with a mounting cavity at each end along the length direction, the straight plate and the translation plate are located in the mounting cavity and are in sliding connection with the movable threshold along the transverse direction, the translation plate is located on the side of the straight plate away from the fixed threshold, the convex block is fixedly connected with the translation plate through the straight plate, the movable threshold is provided with an opening matched with the convex block, an elastic member one is arranged between the straight plate and the movable threshold and used for pushing the straight plate away from the fixed threshold, an elastic member two is fixedly arranged between the straight plate and the translation plate, an avoiding slot is arranged at the upper end of the pushing block, the positioning block is located in the avoiding slot and is in sliding connection with the pushing block from top to bottom and away from the movable threshold, the pressure rod is fixedly arranged at the end of the positioning block close to the straight plate, and the pressure rod passes through the movable threshold and is in sliding connection with the straight plate along the vertical direction, and in the natural state of the elastic member one, the positioning block is located at the end of the avoiding slot close to the movable threshold.

[0019] By adopting the technical scheme, after the motor is started, the push block is close to the fixed threshold, the push block drives the positioning block to move when the push block moves, the positioning block contacts with the fixed threshold when the positioning block reaches the lower end of the fixed threshold, then the push block continues to rise, the positioning block drives the horizontal rod to move along the horizontal direction under the guidance of the inner wall of the avoiding groove, drives the pressure rod to move along the horizontal direction, the pressure rod drives the straight plate to move along the horizontal direction, further drives the protruding block to move along the horizontal direction, when the protruding block does not reach the position of the recess hole, the straight plate moves along the horizontal direction to stretch the elastic member two, when the protruding block reaches the position of the recess hole, the translation plate pushes the protruding block into the recess hole under the action of the elastic member two.

[0020] By adopting the technical scheme, when the vehicle needs to pass through the civil air defense door, the remote controller is pressed to start the motor, the motor is started to drive the movable threshold to lift, so that the vehicle passes through the civil air defense door smoothly, and the convenience of the civil air defense door threshold is improved.

[0021] Optionally, the upper end of the fixed threshold is slidably connected with a clamping block along the horizontal direction, the upper end of the movable threshold is fixedly provided with a positioning portion, the side of the positioning portion facing the fixed threshold is provided with a positioning groove matched with the clamping block, and the clamping block is in abutment with the movable threshold when the clamping block enters the positioning groove.

[0022] By adopting the technical scheme, when the motor is damaged, the handle is rotated to make the movable threshold rise, the clamping block on the fixed threshold is slid along the horizontal direction after rising to the specified position, the clamping block is clamped with the positioning groove, and the movable threshold is limited, so that the applicability of the movable threshold is improved.

[0023] In summary, the present application has at least one of the following beneficial technical effects of the movable threshold of the civil air defense door:

[0024] 1. The motor is connected with the driving gear, the motor is started to drive the driving gear to rotate, the driving gear is engaged with the rack, the driving gear drives the rack to lift, the rack is fixedly connected with the push block, so that the push block is lifted, the push block is fixedly connected with the movable threshold, the lifting of the movable threshold is further realized, and the convenience of the movable threshold of the civil air defense door is improved;

[0025] 2. The side of the movable threshold close to the fixed threshold is provided with the protruding block, the movable threshold is further provided with the driving assembly, the protruding block can be moved into the recess hole, the connection between the movable threshold and the fixed threshold is realized, and the stability of the connection between the movable threshold and the fixed threshold is improved;

[0026] 3. When the protruding block enters the recess hole, the roller is rotatably connected with the protruding block, the friction between the sealing plate and the protruding block is reduced, the sealing plate is prevented from being stuck with the protruding block, and the flexibility of the movable threshold is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a whole structure schematic view of the movable threshold of the civil air defense door.

[0028] Figure 2 is a structural schematic view aiming to highlight the containing groove.

[0029] Figure 3 is a structural schematic view aiming to highlight the movable threshold.

[0030] Figure 4 is Figure 3 is an enlarged schematic view of part A in FIG. 6.

[0031] Figure 5 is a sectional schematic view of the movable threshold.

[0032] Reference signs: 1, fixed threshold; 11, recess hole; 111, sealing plate; 112, torsion spring; 113, roller; 12, containing groove; 121, motor; 1211, infrared receiver; 122, movable gear; 1221, connecting rod; 1222, gear set two; 1223, rotating rod; 1224, gear set one; 1225, handle; 123, rack; 13, clamping block; 2, movable threshold; 21, protruding block; 211, straight plate; 212, pushing block; 213, translation plate; 214, elastic member one; 215, elastic member two; 22, pushing block; 221, positioning block; 222, mounting cavity; 223, pressure rod; 224, avoiding groove; 23, positioning groove; 3, remote controller; 4, supporting block. DETAILED DESCRIPTION

[0033] The present application will be further described in detail below in combination with all the drawings.

[0034] The present application discloses a movable threshold of a civil air defense door. EMBODIMENT

[0035] Referring to Figure 1 and Figure 2 , a movable threshold of a civil air defense door 2 comprises a movable threshold 2, both sides of the movable threshold 2 along the length direction are provided with a fixed threshold 1, the fixed threshold 1 is used for supporting the movable threshold 2, the movable threshold 2 is in sliding connection with the fixed threshold 1 along the vertical direction, and the same supporting block 4 is fixedly arranged at the lower end of each fixed threshold 1, the supporting block 4 is provided with a containing groove 12 in the inside, and the containing groove 12 is provided with a lifting device at the bottom.

[0036] Referring to Figure 2The lifting device comprises a pinion 122, a rack 123, a motor 121 and a push block 22. The motor 121 is arranged in the accommodating groove 112 and fixedly connected to the support block 4. The output shaft of the motor 121 is coaxially fixed with the pinion 122. The motor 121 drives the pinion 122 to rotate. The pinion 122 is engaged with the rack 123. The rotation of the pinion 122 drives the rack 123 to lift. The push block 22 is fixedly connected to the upper end of the rack 123 and slidably connected to the support block 4 in the vertical direction. The lifting of the rack 123 drives the push block 22 to lift. The push block 22 is fixedly connected to the movable door sill 2. The movement of the push block 22 drives the movable door sill 2 to move. When the movable door sill 2 is lifted to a specified position and the motor 121 is powered off, the rotation of the pinion 122 in the circumferential direction is locked, so that the movable door sill 2 is stationary. The convenience of use of the door sill of the civil air defense door is improved.

[0037] With reference to Figure 2 The side, away from the movable door sill 2, of the fixed door sill 1 is provided with a handle 1225. The fixed door sill 1 is rotatably connected with a rotating rod 1223 in the vertical direction. The rotating rod 1223 and the handle 1225 are provided with a gear set one 1224 therebetween. The rotation of the handle 1225 drives the gear set one 1224 to rotate, further drives the rotating rod 1223 to rotate. The rotating rod 1223, the gear set two 1222 and the connecting rod 1221 are provided with a gear set two 1222 therebetween. The rotation of the rotating rod 1223 drives the gear set two 1222 and the connecting rod 1221 to rotate. The side, away from the motor 121, of the pinion 122 is coaxially and fixedly provided with the connecting rod 1221. The rotation of the connecting rod 1221 drives the pinion 122 to rotate, further drives the pinion 122 to rotate, so as to lift the movable door sill 2. The convenience of use of the door sill of the civil air defense door is improved.

[0038] With reference to Figure 3 and Figure 4The convex block 21 is slidably connected to the movable door threshold 2 near the side of the fixed door threshold 1 in the transverse direction, the fixed door threshold 1 is provided with a recess 11, the movable door threshold 2 is provided with a driving assembly for driving the convex block 21 to move in the transverse direction, the driving assembly comprises a positioning block 221, a pressure rod 223, a translation plate 213 and a straight plate 211, the motor 121 is started, the driving gear 122 is rotated to drive the push block 22 to move towards the fixed door threshold 1, the upper end of the push block 22 is provided with an avoiding slot 224, the positioning block 221 is located in the avoiding slot 224 and is slidably connected to the guiding surface in the avoiding slot 224 from top to bottom in the direction away from the movable door threshold 2, the push block 22 drives the positioning block 221 to move when the push block 22 moves, the pressure rod 223 is fixedly arranged at one end of the positioning block 221 near the movable door threshold 2, when the positioning block 221 reaches the lower end of the fixed door threshold 1, the positioning block 221 is in contact with the fixed door threshold 1, the push block 22 continues to rise, the positioning block 221 drives the pressure rod 223 to move in the transverse direction under the guiding action of the inner wall of the avoiding slot 224, the movable door threshold 2 is provided with a mounting cavity 222 at both ends in the length direction, the straight plate 211 and the translation plate 213 are located in the mounting cavity 222 and are slidably connected to the movable door threshold 2 in the transverse direction, the pressure rod 223 passes through the movable door threshold 2 and is slidably connected to the straight plate 211 in the vertical direction, the pressure rod 223 drives the straight plate 211 to move in the transverse direction when the pressure rod 223 moves in the transverse direction.

[0039] With reference to Figure 3 And Figure 4 The convex block 21 is fixedly connected to the straight plate 211 and the translation plate 213 through the straight plate 211, the movable door threshold 2 is provided with an opening matched with the convex block 21, the elastic member one 214 is arranged between the straight plate 211 and the movable door threshold 2, when the positioning block 221 reaches the lower end of the fixed door threshold 1, the straight plate 211 moves in the transverse direction, the elastic member one 214 is compressed, the convex block 21 is driven to move in the transverse direction, the elastic member two 215 is fixedly arranged between the straight plate 211 and the translation plate 213, when the convex block 21 does not reach the position of the recess 11 at this time, the straight plate 211 moves in the transverse direction to stretch the elastic member two 215, when the convex block 21 reaches the position of the recess 11, the translation plate 213 drives the convex block 21 to enter the recess 11 under the action of the elastic member two 215, thereby improving the stability of the connection between the movable door threshold 2 and the fixed door threshold 1.

[0040] With reference to Figure 5The lower end of the inner wall of the recess 11 is provided with a sealing plate 111, the sealing plate 111 is inclined from top to bottom to the direction of the protrusion 21, the inside of the sealing plate 111 is provided with a torsion spring 112, one end of the torsion spring 112 is fixedly connected with the sealing plate 111, the other end is fixedly connected with the fixed sill 1, the torsion spring 112 is used for driving the sealing plate 111 to incline in different directions, so that the movable sill 2 is more convenient to lift, when the protrusion 21 enters the recess 11, the sealing plate 111 is in contact with the protrusion 21 under the action of the torsion spring 112, a sealing structure is formed, the sealing property of the movable sill 2 is improved, the upper end of the sealing plate 111 is rotatably connected with a roller 113, the roller 113 is rotatably connected with the protrusion 21, the friction between the sealing plate 111 and the protrusion 21 is reduced, and the sealing plate 111 is prevented from being stuck with the protrusion 21.

[0041] With reference to Figure 5 The upper end of the fixed sill 1 is slidably connected with a clamping block 13 in the transverse direction, the upper end of the movable sill 2 is fixedly provided with a positioning portion, the side of the positioning portion, which faces the fixed sill 1, is provided with a positioning groove 23 matched with the clamping block 13, when the motor 121 is damaged, the handle 1225 is rotated to lift the movable sill 2, after the movable sill 2 is lifted to a specified position, the clamping block 13 on the fixed sill 1 is slid in the transverse direction, when the clamping block 13 enters the positioning groove 23, the movable sill 2 is in contact with the clamping block 13, the connection between the movable sill 2 and the fixed sill 1 is more firm, and the possibility of the movable sill 2 falling is reduced.

[0042] With reference to Figure 5 Further, the application also comprises an infrared receiver 1211 and a remote controller 3, the infrared receiver 1211 is located in the motor 121, the remote controller 3 can radiate infrared rays, the infrared receiver 1211 is used for receiving the infrared ray signal radiated by the remote controller 3, when the vehicle needs to pass through the civil air defense door, the remote controller 3 is pressed, the infrared receiver 1211 receives the signal and controls the motor 121 to start and stop, drives the movable sill 2 to lift and fall, and makes the vehicle pass through the civil air defense door smoothly, thereby improving the convenience of using the civil air defense door sill.

[0043] The application discloses a civil air defense door movable sill 2, which has the advantages that when the vehicle passes through the civil air defense door, the controller is pressed to radiate an infrared ray signal or the handle 1225 is rotated, the motor 121 is started, the movable gear 122 is driven to rotate, the rack 123 is lifted, the push block 22 and the movable sill 2 are lifted, the protrusion 21 is moved in the transverse direction when the positioning block 221 reaches the lower end of the fixed sill 1, enters the recess 11, the movable sill 2 is connected with the fixed sill 1, the dismounting time of the sill is reduced, and the convenience of using the civil air defense door sill is improved.

[0044] The above are all preferred embodiments of the application, and do not limit the protection scope of the application, therefore: any equivalent changes made on the basis of the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A mobile threshold for a civil defense door, comprising a mobile threshold (2), characterized in that: The movable threshold (2) is provided with a fixed threshold (1) on both sides along the length direction, the fixed threshold (1) is used for supporting the movable threshold (2), the movable threshold (2) is slidably connected with the fixed threshold (1) along the vertical direction, the lower end of the two fixed thresholds (1) is fixedly provided with a same supporting block (4), the supporting block (4) is provided with an accommodating groove (12) in the inside, the bottom of the accommodating groove (12) is provided with a lifting device, the lifting device is used for driving the movable threshold (2) to move along the vertical direction, the side of the movable threshold (2) close to the fixed threshold (1) is slidably connected with a protruding block (21) along the horizontal direction, the fixed threshold (1) is provided with a recess (11), and the movable threshold (2) is provided with a driving assembly used for driving the protruding block (21) to move along the horizontal direction.

2. The movable door sill of civil defense door according to claim 1, characterized in that: The lifting device comprises a driving gear (122), a rack (123), a motor (121) and a pushing block (22), the motor (121) is located in the accommodating groove (12) and is fixedly connected with the supporting block (4), the output shaft of the motor (121) is coaxially fixed with the driving gear (122), the rack (123) is located below the pushing block (22) and is fixedly connected with the pushing block (22), the driving gear (122) is in meshing connection with the rack (123), the pushing block is fixedly connected with the lower end of the movable threshold (2) and is slidably connected with the supporting block (4) along the vertical direction, and the driving gear (122) is locked in rotation along the circumferential direction when the motor (121) is powered off.

3. The mobile threshold of the civil defense door according to claim 2, characterized in that: The side, away from the movable threshold (2), of the fixed threshold (1) is provided with a handle (1225), the fixed threshold (1) is rotatably connected with a rotating rod (1223) along the vertical direction, a gear set one (1224) is arranged between the rotating rod (1223) and the handle (1225), the handle (1225) drives the rotating rod (1223) to rotate through the gear set one (1224), the side, away from the motor (121), of the driving gear (122) is coaxially fixedly provided with a connecting rod (1221), a gear set two (1222) is arranged between the connecting rod (1221) and the rotating rod (1223), and the rotating rod (1223) drives the connecting rod (1221) to rotate through the gear set two (1222).

4. The movable threshold of the civil defense door according to claim 2, characterized in that: The movable threshold (2) further comprises an infrared receiver (1211) and a remote controller (3), the infrared receiver (1211) is located in the inside of the supporting block (4) and is connected with the motor (121), the remote controller (3) radiates infrared rays, the infrared receiver (1211) is used for receiving the infrared ray signals radiated by the remote controller (3), and the infrared receiver (1211) controls the motor (121) to start or stop after receiving the signals.

5. The movable threshold of a civil defense door according to claim 1, characterized in that: The height of the recess (11) along the vertical direction is greater than the height of the protruding block (21), the lower end of the inner wall of the recess (11) is provided with a sealing plate (111), the sealing plate (111) is hingedly connected with the fixed threshold (1) along the vertical direction, the protruding block (21) abuts against the sealing plate (111) when entering the recess (11), the sealing plate (111) is inclined from top to bottom to the direction close to the movable threshold (2) when abutting against the protruding block (21), and the inside of the sealing plate (111) is provided with a torsion spring (112), and the torsion spring (112) is used for driving the sealing plate (111) to be close to the movable threshold (2).

6. The mobile threshold of the civil defense door according to claim 5, characterized in that: The upper end of the sealing plate (111) is rotationally connected with a roller (113), and when the protrusion (21) is located in the recess (11), the roller (113) is in rolling connection with the protrusion (21).

7. The mobile threshold of the civil defense door according to claim 1, characterized in that: The driving assembly comprises a positioning block (221), a pressure rod (223), a translation plate (213) and a straight plate (211), both ends of the movable threshold (2) in the length direction are provided with mounting cavities (222), the straight plate (211) and the translation plate (213) are located in the mounting cavities (222) and are in sliding connection with the movable threshold (2) in the transverse direction, the translation plate (213) is located on the side of the straight plate (211) away from the fixed threshold (1), the protrusion (21) is fixedly connected with the translation plate (213) through the straight plate (211), the movable threshold (2) is provided with an opening matched with the protrusion (21), an elastic member one (214) is arranged between the straight plate (211) and the movable threshold (2), the elastic member one (214) is used for pushing the straight plate (211) away from the fixed threshold (1), an elastic member two (215) is fixedly arranged between the straight plate (211) and the translation plate (213), the upper end of the push block (22) is provided with an avoiding groove (224), the positioning block (221) is located in the avoiding groove (224) and is in sliding connection with the push block (22) from top to bottom in the direction away from the movable threshold (2), the pressure rod (223) is fixedly arranged at one end of the positioning block (221) close to the straight plate (211), and the pressure rod (223) passes through the movable threshold (2) and is in sliding connection with the straight plate (211) in the vertical direction, and in the natural state of the elastic member one (214), the positioning block (221) is located at one end of the avoiding groove (224) close to the movable threshold (2).

8. The mobile threshold of the civil defense door according to claim 1, characterized in that: The upper end of the fixed threshold (1) is in sliding connection with a clamping block (13) in the transverse direction, the upper end of the movable threshold (2) is fixedly provided with a positioning portion, the side of the positioning portion facing the fixed threshold (1) is provided with a positioning groove (23) matched with the clamping block (13), and the clamping block (13) is in abutment with the movable threshold (2) when entering the positioning groove (23).

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