Entrance guard all-in-one machine based on face recognition system

Abstract

The invention relates to the technical field of entrance guard, and particularly discloses an entrance guard all-in-one machine based on a face recognition system, the entrance guard all-in-one machine comprises a gate machine and an entrance guard controller, an opening is formed in one side of the upper end of a gate machine box body, a moving box is installed in the gate machine through a lifting part, when a person approaches the gate machine, an infrared sensor on the gate machine recognizes the approaching person, and the entrance guard controller is started; then a signal is sent to the access controller, the access controller starts the camera to capture a human face for continuous recognition, if the human face is within the recognition range of the camera, recognition is completed, a gate machine is controlled to open a gate, and if the human face is not within the recognition range of the camera or is not completely within the recognition range, the access controller sends a signal to the central processing unit; the central processing unit controls the second servo motor and the first driving motor to rotate forwards and backwards quickly, so that the access controller is driven to drive the camera to rotate forwards and backwards and overturn forwards and backwards at the rotating speed, a human face is quickly found and recognized, and the intelligent and humanized effects are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of access control, and in particular to an integrated access control machine based on a face recognition system. Background Art

[0002] The facial recognition access control system is a completely offline facial recognition access control and attendance system. It targets the mid-to-high-end access control and attendance market, replacing existing card and fingerprint access control systems. It uses a regional feature analysis algorithm, a widely used algorithm in facial recognition technology, that integrates computer image processing techniques with biometric principles. It extracts facial feature points from video footage using computer image processing techniques and applies biometric principles to analyze and create a mathematical model, known as a facial feature template. The generated facial feature template is then compared to the subject's facial features for feature analysis, and a similarity score is generated based on the analysis results. This score can be used to determine if the subject is the same person.

[0003] Most existing facial recognition access control systems use fixed positions for shooting and recognition, and cannot rotate freely to recognize faces, resulting in a smaller recognition range and reduced recognition accuracy. When pedestrians need to pass through the access control, they need to actively look for the camera's position on their faces so that the camera can collect facial information, which affects the speed at which pedestrians enter and exit the access control system and is not intelligent or user-friendly enough. Summary of the Invention

[0004] The purpose of the present invention is to provide an integrated access control machine based on a face recognition system to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an integrated access control machine based on a face recognition system, comprising: a gate machine and an access control controller, an opening being formed on one side of an upper end of a gate machine housing, a movable box being installed in the gate machine via a lifting component, the movable box being located at the lower end of the opening, a top plate being mounted on the upper end of the movable box via a fixing frame, the upper end of the top plate being rotatably connected to a rotating plate via a rotating component, the diameter of the rotating plate being smaller than the width of the opening, side plates being fixedly mounted on both sides of the upper end of the rotating plate, the access control controller being rotatably connected between the two side plates via a circular shaft, and a camera being fixedly mounted on the upper end of the access control controller;

[0006] A moving block is slidably connected to the inner wall of the upper end of the gate machine, and the size of the moving block is larger than the size of the opening. The upper end of the moving block is elastically connected to a blocking plate, and the size of the blocking plate is smaller than the size of the opening. A guide slope is provided on the upper side of the rear end of the blocking plate. When the moving block moves to the lower end of the opening, the blocking plate bounces into the opening. A central processing unit is fixedly installed on the inner end of the gate machine.

[0007] Preferably, the lifting component includes a threaded rod, a guide rod and a servo motor. The threaded rod is rotatably connected to one side of the inner end of the gate, and the guide rod is fixedly installed on the other side of the inner end of the gate. A pulley is fixedly installed at the lower end of the threaded rod, and a pulley is fixedly installed at the output end of the servo motor. The outer ends of the two pulleys are connected with belts for transmission.

[0008] Preferably, the outer wall of the threaded rod is threadedly connected to a threaded sleeve, the outer wall of the guide rod is slidably connected to a guide sleeve, the guide sleeve is fixedly mounted on the outer wall of one end of the moving box, and the threaded sleeve is fixedly mounted on the outer wall of the other end of the moving box.

[0009] Preferably, a heat dissipation net is fixedly installed at one end of the mobile box, and the fixing frame is L-shaped. One end of the fixing frame is fixed to the side wall of the mobile box by bolts, and the other end is fixed to the lower end of the top plate by bolts. A circular hole is opened at the center of the top plate, and a circular ring is fixedly installed on the upper end of the top plate. Several fixed blocks are evenly fixed on the upper end of the circular ring, and the upper end of each fixed block is rollingly connected with a ball, and the outer end of the ball is rollingly connected to the lower end of the rotating plate.

[0010] Preferably, the rotating component includes servo motor 2, which is fixedly installed in the moving box. The output end of servo motor 2 is fixedly installed with a rotating shaft through a coupling. The upper end of the rotating shaft passes through the circular hole and is fixedly connected to the center of the lower end of the rotating plate.

[0011] Preferably, circular shafts are fixedly mounted on both left and right sides of the lower end of the access controller, and one end of the circular shaft away from the access controller is rotatably connected to the side plate via a bearing.

[0012] Preferably, an operating cavity is provided at the inner end of one of the side panels, and a heat dissipation net is fixedly installed at the lower end, one end of the circular shaft is inserted into the operating cavity and fixedly installed with gear 1, a driving motor 1 is fixedly installed in the operating cavity, and a gear 2 is fixedly installed at the output end of the driving motor 1, and the gear 2 is meshed with the outer wall of the gear 1.

[0013] Preferably, a motor frame is fixedly installed on the inner wall of the upper end of the gate, a driving motor 2 is fixedly installed in the motor frame, a gear 3 is fixedly installed on the output end of the driving motor 2, a rack is fixedly installed on one end of the moving block, and the outer wall of the gear 3 is meshed with the outer wall of the rack.

[0014] Preferably, slide grooves are provided on both sides of the inner wall of the upper end of the gate, and the slide grooves are convex. Slide blocks are fixedly installed on both sides of the upper end of the moving block, and the slide blocks are convex. The upper end of the slide block slides into the slide groove.

[0015] Preferably, a sliding cavity is opened at the upper end of the movable block, and the sliding cavity is located between the two sliders. Several springs are evenly fixedly installed on the inner end of the sliding cavity. The lower end of the sealing plate is slidably inserted into the sliding cavity, and the lower end of the sealing plate and the upper end of the spring are fixedly connected. When the spring is in a balanced state, the upper end of the sealing plate is flush with the upper end of the gate machine.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention provides an opening at the upper end of the gate housing. When the gate is not in use, the access controller is lowered into the gate housing by a lifting component, and the opening is blocked by a blocking plate, thereby protecting the access controller.

[0018] The second driving motor drives the moving block with the blocking plate to move to one side of the opening to expose the opening, and the access control controller is lifted out of the gate machine by the lifting component. At this time, the top plate moves into the opening and blocks the opening again to prevent foreign objects from entering the gate machine box. When a person approaches the gate machine, the infrared sensor on the gate machine recognizes the approaching person, and then sends a signal to the access control controller. The access control controller starts the camera to capture the face and continues to recognize. If the face is within the range of camera recognition, the recognition is completed and the gate machine is controlled to open the gate. If the face is not within the range of camera recognition or is not completely within the range of recognition, the access control controller sends a signal to the central processing unit, and the central processing unit controls the servo motor 2 and the drive motor 1 to rotate rapidly in forward and reverse directions, thereby driving the access control controller to rotate in the forward and reverse directions of the camera speed and flip back and forth, quickly finding and recognizing faces, which is more intelligent and humane. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the inner end structure of the gate of the present invention;

[0021] Figure 3 This is a schematic diagram of the movable box of the present invention being installed between the threaded rod and the guide rod;

[0022] Figure 4 This is a schematic diagram of the rotating plate, top plate and moving box of the present invention;

[0023] Figure 5 This is a schematic diagram of the connection between the access controller and the side panel of the present invention;

[0024] Figure 6 This is a schematic diagram of the movable block of the present invention being located at the lower end of the opening;

[0025] Figure 7 For the present invention Figure 6 A magnified view of the structure of the middle A area;

[0026] Figure 8 This is a schematic diagram of the movable block and the blocking plate of the present invention.

[0027] In the figure: 1. Gate; 2. Opening; 3. Threaded rod; 4. Guide rod; 5. Pulley; 6. Servo motor 1; 7. Belt; 8. Moving box; 9. Guide sleeve; 10. Threaded sleeve; 11. Fixed frame; 12. Top plate; 13. Servo motor 2; 14. Round hole; 15. Round ring; 16. Fixed block; 17. Ball bearing; 18. Rotating plate; 19. Rotating shaft; 20. Side panel; 21. Access controller; 22. Camera; 23. Card swiping area; 24. Round shaft; 25. Gear 1; 26. Drive motor 1; 27. Gear 2; 28. Motor frame; 29. ​​Drive motor 2; 30. Gear 3; 31. Slide; 32. Moving block; 33. Rack; 34. Sliding cavity; 35. Spring; 36. Slider; 37. Blocking plate; 38. CPU. DETAILED DESCRIPTION

[0028] In order to clearly and completely describe the objectives and technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1-8 The present invention provides a technical solution: an access control integrated machine based on a face recognition system, comprising: a gate machine 1 and an access control controller 21. An opening 2 is provided on one side of the upper end of the gate machine 1 housing for the access control controller 21 to enter and exit. A moving box 8 is installed in the gate machine 1 through a lifting component. The lifting component comprises a threaded rod 3, a guide rod 4 and a servo motor 6. The threaded rod 3 is rotatably connected to one side of the inner end of the gate machine 1, and the guide rod 4 is fixedly installed on the other side of the inner end of the gate machine 1. The threaded rod 3 and the guide rod 4 are respectively located on the left and right sides of the opening 2. The threaded rod 3 is connected to the inner end of the gate machine 1, and the guide rod 4 is fixedly installed on the other side of the inner end of the gate machine 1. The threaded rod 3 and the guide rod 4 are respectively located on the left and right sides of the opening 2. A pulley 5 is fixedly installed at the lower end of the rod 3, and the output end of the servo motor 6 is fixedly installed with the pulley 5. The outer ends of the two pulleys 5 are connected with belts 7 for transmission. A support plate is fixedly installed on the inner wall of the bottom end of the gate machine 1. The support plate is L-shaped, one end of the support plate is fixed on the inner wall of the gate machine 1, and the other end is rotatably connected to the output end of the servo motor 6. The servo motor 6 can rotate forward and backward. When the servo motor 6 is started, it drives the pulley 5 to rotate, and the pulley 5 drives the other pulley 5 to rotate through the belt 7, thereby driving the threaded rod 3 to rotate.

[0030] The outer wall of the threaded rod 3 is threadedly connected with a threaded sleeve 10, and the outer wall of the guide rod 4 is slidably connected with a guide sleeve 9. The guide sleeve 9 is fixedly mounted on the outer wall of one end of the mobile box 8, and the threaded sleeve 10 is fixedly mounted on the outer wall of the other end of the mobile box 8. When the servo motor 6 drives the threaded rod 3 to rotate, the threaded rod 3 drives the threaded sleeve 10 to move, and the threaded sleeve 10 moves with the mobile box 8 at the inner end of the gate machine 1. At the same time, the guide sleeve 9 slides on the outer wall of the guide rod 4, which facilitates the adjustment of the position of the mobile box 8.

[0031] The mobile box 8 is located at the lower end of the opening 2, and the upper end of the mobile box 8 is open. A heat dissipation net is fixedly installed at one end of the mobile box 8 to facilitate heat dissipation of the servo motor 2 13. A top plate 12 is installed on the upper end of the mobile box 8 through a fixing frame 11. A circular hole 14 is opened at the center of the top plate 12. The size of the top plate 12 is smaller than the size of the opening 2. The fixing frame 11 is L-shaped. One end of the fixing frame 11 is fixed to the side wall of the mobile box 8 by bolts, and the other end is fixed to the lower end of the top plate 12 by bolts. A gap is provided between the top plate 12 and the upper end of the mobile box 8 to facilitate heat dissipation of the servo motor 2 13. The upper end of the top plate 12 is rotatably connected to a rotating plate 18 through a rotating component. The diameter of the rotating plate 18 is smaller than the width of the opening 2. A circular ring is fixedly installed on the upper end of the top plate 12 15. Several fixed blocks 16 are evenly fixed on the upper end of the ring 15. The upper end of each fixed block 16 is rollingly connected with a ball 17. Two-thirds of the ball 17 is located in the fixed block 16. The outer end of the ball 17 is rollingly connected to the lower end of the rotating plate 18. When the rotating plate 18 rotates, the ball 17 rotates at the lower end of the rotating plate 18, making the rotation of the rotating plate 18 more stable. Side panels 20 are fixedly installed on the left and right sides of the upper end of the rotating plate 18. The access control controller 21 is rotatably connected between the two side panels 20 through a circular shaft 24. A camera 22 is fixedly installed on the upper end of the access control controller 21, and a card swiping area 23 is provided at the lower end. The camera 22 is electrically connected to the access control controller 21, and the access control controller 21 is electrically connected to the central processor 38 and the gate machine 1.

[0032] The rotating component includes a servo motor 2 13, which is fixedly installed in the mobile box 8. The servo motor 2 13 can rotate forward and reverse. The output end of the servo motor 2 13 is fixedly installed with a rotating shaft 19 through a coupling. The upper end of the rotating shaft 19 passes through the circular hole 14 and is fixedly connected to the center of the lower end of the rotating plate 18. The servo motor 2 13 starts to drive the rotating shaft 19 to rotate. When the rotating shaft 19 rotates, it can drive the rotating plate 18 to rotate, thereby driving the access control controller 21 to rotate.

[0033] The access controller 21 is fixedly mounted with a circular shaft 24 on both sides of the lower end. The end of the circular shaft 24 away from the access controller 21 is rotatably connected to the side plate 20 through a bearing. The access controller 21 can be rotated between the two side plates 20 through the circular shaft 24, thereby adjusting the angle at which the access controller 21 recognizes a face. An operating cavity is provided at the inner end of one of the side plates 20, and a heat dissipation net is fixedly mounted at the lower end. The heat dissipation net serves to dissipate heat for the drive motor 26. One end of the circular shaft 24 is inserted into the operating cavity and is fixedly mounted with a gear 25. A gear 26 is fixedly mounted in the operating cavity. Drive motor 1 26, the output end of drive motor 1 26 is fixedly installed with gear 2 27, gear 2 27 is meshed with the outer wall of gear 1 25, drive motor 1 26 can rotate forward and reverse, thereby driving gear 2 27 to rotate forward and reverse, when gear 2 27 rotates, gear 1 25 is driven to rotate, when gear 1 25 rotates, access control controller 21 is driven to rotate, the inner end of gate machine 1 is fixedly installed with central processing unit 38, central processing unit 38 is electrically connected to servo motor 1 6, servo motor 2 13, drive motor 1 26 and drive motor 2 29 respectively.

[0034] Specifically, when a person approaches the gate machine 1, the infrared sensor on the gate machine 1 recognizes the approaching person, and then sends a signal to the access control controller 21. The access control controller 21 starts the camera 22 to capture the face and continue to recognize it. If the face is within the recognition range of the camera 22, the recognition is completed and the gate machine 1 is controlled to open the gate. If the face is not within the recognition range of the camera 22 or is not completely within the recognition range, the access control controller 21 sends a signal to the central processor 38. The central processor 38 controls the servo motor 2 13 and the drive motor 1 26 to rotate rapidly in forward and reverse directions, thereby driving the access control controller 21 to rotate in the forward and reverse directions and flip back and forth with the speed of the camera 22, quickly finding and recognizing faces, which is more intelligent and humane.

[0035] like Figure 1 、 Figure 6 、 Figure 7 and Figure 8When the cam 35 is in a balanced state, the upper end of the blocking plate 37 is flush with the upper end of the gate machine 1 to block the opening 2.

[0036] The upper inner wall of the gate machine 1 is fixedly mounted with a motor frame 28, and a driving motor 29 is fixedly mounted in the motor frame 28. The driving motor 29 can rotate in both directions. The output end of the driving motor 29 is fixedly mounted with a gear 30, and one end of the moving block 32 is fixedly mounted with a rack 33. The outer wall of the gear 30 is meshed with the outer wall of the rack 33. When the driving motor 29 is started, the gear 30 can be driven to rotate. When the gear 30 rotates, it walks on the rack 33, which can drive the moving block 32 to move. Slide grooves 31 are provided on the left and right sides of the upper inner wall of the gate machine 1. The slide grooves 31 are convex. Slide blocks 36 are fixedly mounted on the left and right sides of the upper end of the moving block 32. The two slide blocks 36 are respectively located on the left and right sides of the sliding cavity 34. The slide blocks 36 are convex. The upper end of the slide block 36 slides and is inserted into the slide groove 31. When the moving block 32 moves, the slide block 36 slides in the slide groove 31 to guide and limit the moving block 32.

[0037] Specifically, when the gate machine 1 is not in use, the access control controller 21 is put into the inner end of the gate machine 1 through the lifting component, and then the drive motor 29 is started to drive the gear 30 to rotate, and the gear 30 drives the rack 33 to move, and enters the drive moving block 32 to move. When the moving block 32 moves to the lower end of the opening 2 with the blocking plate 37, it bounces into the opening 2 under the reaction force of the spring 35 to block the opening 2. When the gate machine 1 needs to be used, the drive motor 29 is started to rotate in the opposite direction to move the moving block 32 in the opposite direction. At this time, the guide slope at the upper end of the blocking plate 37 contacts the edge of the opening 2, and the blocking plate 37 is pushed downward through the guide slope. The blocking plate 37 slides into the sliding cavity 34 through the compression spring 35, and then the moving block 32 can be moved to one side of the opening 2 to expose the opening 2, and the access control controller 21 can be lifted out of the gate machine 1 through the lifting component.

[0038] In actual use, the driving motor 29 drives the moving block 32 with the blocking plate 37 to move to one side of the opening 2, exposing the opening 2, and the access control controller 21 is lifted out of the gate machine 1 by the lifting component. At this time, the top plate 12 moves into the opening 2 and blocks the opening 2 again to prevent foreign objects from entering the box of the gate machine 1. When a person approaches the gate machine 1, the infrared sensor on the gate machine 1 recognizes the approaching person, and then sends a signal to the access control controller 21. The access control controller 21 starts the camera 22 to capture the face and continue to recognize it. If the face is within the recognition range of the camera 22, the recognition is completed and the gate machine 1 is controlled to open the gate. If the face is not within the recognition range of the camera 22 or is not completely within the recognition range, the access control controller 21 sends a signal to the central processor 38. The central processor 38 controls the servo motor 2 13 and the drive motor 1 26 to rotate rapidly in forward and reverse directions, thereby driving the access control controller 21 to rotate in the forward and reverse directions of the camera 22 and flip back and forth, quickly finding and recognizing the face, which is more intelligent and humane.

[0039] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An integrated access control machine based on a face recognition system, comprising: A gate machine (1) and a door access controller (21), wherein an opening (2) is provided on one side of the upper end of a box of the gate machine (1), and the characteristics are as follows: a moving box (8) is installed in the gate machine (1) through a lifting component, the moving box (8) is located at the lower end of the opening (2), a top plate (12) is installed on the upper end of the moving box (8) through a fixing frame (11), the upper end of the top plate (12) is rotatably connected to a rotating plate (18) through a rotating component, the diameter of the rotating plate (18) is smaller than the width of the opening (2), side plates (20) are fixedly installed on both sides of the upper end of the rotating plate (18), the door access controller (21) is rotatably connected between the two side plates (20) through a circular shaft (24), and a camera (22) is fixedly installed on the upper end of the door access controller (21); A moving block (32) is slidably connected to the inner wall of the upper end of the gate (1); the size of the moving block (32) is larger than the size of the opening (2); a blocking plate (37) is elastically connected to the upper end of the moving block (32); the size of the blocking plate (37) is smaller than the size of the opening (2); a guide slope is provided on the upper side of the rear end of the blocking plate (37); when the moving block (32) moves to the lower end of the opening (2), the blocking plate (37) pops into the opening (2); and a central processing unit (38) is fixedly installed at the inner end of the gate (1).

2. The access control integrated machine based on the face recognition system according to claim 1, characterized in that: The lifting component comprises a threaded rod (3), a guide rod (4) and a servo motor (6); the threaded rod (3) is rotatably connected to one side of the inner end of the gate (1); the guide rod (4) is fixedly mounted on the other side of the inner end of the gate (1); a pulley (5) is fixedly mounted on the lower end of the threaded rod (3); the output end of the servo motor (6) is fixedly mounted on the pulley (5); and the outer ends of the two pulleys (5) are transmission-connected with belts (7).

3. The access control integrated machine based on the face recognition system according to claim 2, characterized in that: The outer wall of the threaded rod (3) is threadedly connected with a threaded sleeve (10), the outer wall of the guide rod (4) is slidably connected with a guide sleeve (9), the guide sleeve (9) is fixedly mounted on the outer wall of one end of the moving box (8), and the threaded sleeve (10) is fixedly mounted on the outer wall of the other end of the moving box (8).

4. The access control integrated machine based on the face recognition system according to claim 1, characterized in that: A heat dissipation net is fixedly mounted on one end of the moving box (8); the fixing frame (11) is L-shaped; one end of the fixing frame (11) is fixed to the side wall of the moving box (8) by bolts; the other end of the fixing frame (11) is fixed to the lower end of the top plate (12) by bolts; a circular hole (14) is provided at the center of the top plate (12); a circular ring (15) is fixedly mounted on the upper end of the top plate (12); a plurality of fixing blocks (16) are evenly fixedly mounted on the upper end of the circular ring (15); a ball (17) is rollingly connected to the upper end of each fixing block (16); and the outer end of the ball (17) is rollingly connected to the lower end of the rotating plate (18).

5. The access control integrated machine based on face recognition system according to claim 1, characterized in that: The rotating component comprises a servo motor 2 (13), which is fixedly mounted in the moving box (8). The output end of the servo motor 2 (13) is fixedly mounted with a rotating shaft (19) via a coupling. The upper end of the rotating shaft (19) passes through the circular hole (14) and is fixedly connected to the center of the lower end of the rotating plate (18).

6. The access control integrated machine based on the face recognition system according to claim 1, characterized in that: A circular shaft (24) is fixedly mounted on both left and right sides of the lower end of the access controller (21), and one end of the circular shaft (24) away from the access controller (21) is rotatably connected to the side plate (20) via a bearing.

7. The access control integrated machine based on the face recognition system according to claim 6, characterized in that: An operating cavity is provided at the inner end of one of the side plates (20), and a heat dissipation net is fixedly installed at the lower end. One end of the circular shaft (24) is inserted into the operating cavity and fixedly installed with a gear 1 (25). A driving motor 1 (26) is fixedly installed in the operating cavity. A gear 2 (27) is fixedly installed at the output end of the driving motor 1 (26). The gear 2 (27) is meshingly connected with the outer wall of the gear 1 (25).

8. The access control integrated machine based on the face recognition system according to claim 1, characterized in that: A motor frame (28) is fixedly mounted on the inner wall of the upper end of the gate machine (1), a driving motor 2 (29) is fixedly mounted in the motor frame (28), a gear 3 (30) is fixedly mounted on the output end of the driving motor 2 (29), a rack (33) is fixedly mounted on one end of the moving block (32), and the outer wall of the gear 3 (30) is meshingly connected with the outer wall of the rack (33).

9. The access control integrated machine based on face recognition system according to claim 1, characterized in that: The left and right sides of the inner wall at the upper end of the gate machine (1) are provided with slide grooves (31), the slide grooves (31) are convex, and the left and right sides of the upper end of the moving block (32) are fixedly installed with sliders (36), the sliders (36) are convex, and the upper ends of the sliders (36) are slidably inserted into the slide grooves (31).

10. The access control integrated machine based on face recognition system according to claim 9, characterized in that: The upper end of the moving block (32) is provided with a sliding cavity (34), which is located between two sliding blocks (36). A plurality of springs (35) are evenly and fixedly installed at the inner end of the sliding cavity (34). The lower end of the blocking plate (37) is slidably inserted into the sliding cavity (34), and the lower end of the blocking plate (37) is fixedly connected to the upper end of the spring (35). When the spring (35) is in a balanced state, the upper end of the blocking plate (37) is flush with the upper end of the gate machine (1).

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