An automotive airbag multi-point impact detection device

Abstract

The present invention discloses a multi-point impact detection device for an automotive airbag, which includes a fixed plate. An airbag assembly is movably and snap-fitted on the fixed plate. A positioning plate is arranged on one side of the fixed plate. A plurality of moving plates are slidably arranged on the positioning plate. A vertical plate is arranged on the side of the positioning plate away from the fixed plate. A cylinder is fixedly arranged on the side of the vertical plate close to the positioning plate. A detection component is arranged on one side of the cylinder. An arc-shaped plate is fixedly arranged at one end of the moving plate close to the vertical plate. The arc-shaped plate is slidably connected to the cylinder and is in transmission connection with the detection component. The multi-point impact detection device for an automotive airbag provided by the present invention realizes that the ring and the recording pen can rotate during the inflation process of the airbag through the cooperation of the arc-shaped plate, the arc-shaped groove, the round rod and the ring, so that the recording pen leaves a track on the recording plate, facilitating the operator to analyze and observe data.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive airbag detection, and specifically to a multi-point impact detection device for automotive airbags. Background Art

[0002] An automotive airbag is a passive safety device used to protect vehicle occupants from severe injuries during a collision. It usually consists of a collision sensor, an airbag computer, a system indicator light, an airbag assembly, etc. When a vehicle collides, the collision sensor quickly detects the collision signal and transmits the signal to the airbag computer. The airbag computer determines whether to inflate the airbag based on information such as the intensity and angle of the collision. If the airbag needs to be inflated, the airbag computer issues an instruction to ignite the igniter in the gas generator, generating a large amount of gas that quickly fills the airbag, causing the airbag to expand and deploy within a very short time, forming a buffer pad to reduce the impact force on the driver and passengers.

[0003] Before being put into use, it is usually necessary to conduct impact detection tests on the airbag to ensure that it can fully deploy as expected during a collision. To measure the impact force, multiple movable rods can be installed on one side of the airbag, with different angles between each rod and the airbag. By counting the distances the rods move, the inflation states of various parts of the airbag can be analyzed. This method is more economical than using sensors. However, this process requires the operator to carefully read the scale of each rod, so it is time-consuming and prone to errors. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-point impact detection device for automotive airbags to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A multi-point impact detection device for automotive airbags, including a fixed plate, on which an airbag assembly is movably clamped. A positioning plate is arranged on one side of the fixed plate, and a plurality of moving plates are slidably arranged on the positioning plate. A vertical plate is arranged on the side of the positioning plate away from the fixed plate. A cylinder is fixedly arranged on the side of the vertical plate close to the positioning plate. A detection component is arranged on one side of the cylinder. An arc-shaped plate is fixedly arranged at one end of the moving plate close to the vertical plate. The arc-shaped plate is slidably connected to the cylinder and is in transmission connection with the detection component.

[0006] As a further solution of the present invention: The detection component includes a ring, which is movably sleeved outside the cylinder. There are a plurality of rings. An arc-shaped groove is opened on the outside of the arc-shaped plate. A round rod is fixedly arranged on the inner side of each ring, and the round rod is slidably fitted with the arc-shaped groove. A recording pen is fixedly arranged on one side of the ring, and a recording board is arranged on one side of the cylinder. The recording pen is in movable contact with the recording board.

[0007] As a further solution of the present invention: a notch is provided at the center of the cylinder, a lead screw is rotatably arranged in the notch, one end of the lead screw movably penetrates through the cylinder and a moving block is movably sleeved on the outer side of the end, a cross bar is fixedly arranged on one side of the moving block, the end of the cross bar away from the moving block movably penetrates through the side wall of the cylinder, a fixed block is fixedly arranged on one side of the moving block, a movable block is slidably arranged in the fixed block, the end of the movable block away from the fixed block is fixedly connected with the recording board, and a positioning spring is fixedly connected between the movable block and the fixed block.

[0008] As a further solution of the present invention: a moving rack is fixedly arranged on one side of the arc-shaped plate, the moving rack is slidably connected with the notch, a rotating gear is fixedly sleeved on the outer side of the lead screw, the rotating gear is movably arranged in the notch, and the moving rack is in meshing transmission with the rotating gear.

[0009] As a further solution of the present invention: a cross plate is fixedly arranged on the positioning plate, a plurality of wiping pads are fixedly arranged at the bottom of the cross plate, the horizontal distance between the wiping pad and the recording board is greater than the horizontal distance between the recording pen and the recording board, and the wiping pad is in movable abutment with the recording board.

[0010] As a further solution of the present invention: a plurality of fixed frames are fixedly arranged on the bottom of the cross plate on one side of the wiping pad, a movable rod horizontally movably penetrates through one side of the fixed frame, a limiting plate is fixedly arranged at the end of the movable rod close to the recording board, an inclined groove is arranged at the end of the limiting plate away from the wiping pad, a first spring is fixedly connected between the movable rod and the inner wall of the fixed frame, a limiting rod is fixedly arranged at the top of the recording board, and the limiting rod is in movable abutment with the inclined groove.

[0011] As a further solution of the present invention: a movable plate is movably arranged in the fixed frame, a positioning groove and a reset groove are respectively arranged on both sides of the movable plate, a positioning rod is fixedly arranged at the bottom of the movable rod, a clamping plate is fixedly arranged in the positioning groove of the movable plate, the positioning rod is slidably connected with the positioning groove and is movably clamped with the clamping plate, an inclined plate is fixedly arranged in the reset groove of the movable plate, a transverse moving rod horizontally movably penetrates through the fixed frame above the inclined plate, a reset rod is fixedly arranged at the bottom of the transverse moving rod, the reset rod is slidably connected with the reset groove and is in movable abutment with the inclined plate, and a second spring is fixedly connected between the transverse moving rod and the inner wall of the fixed frame.

[0012] As a further solution of the present invention: a transverse groove is provided on the movable plate, a vertical rod is fixedly arranged on the fixed frame, the vertical rod is slidably connected to the transverse groove, a return spring is fixedly arranged between the vertical rod and the movable plate, a connecting rod is fixedly arranged on one side of the recording plate, a connecting plate is fixedly arranged on one end of the connecting rod away from the recording plate, notches are provided on both sides of the connecting plate, and the movable rod and one end of the transverse rod are movably abutted against the notch.

[0013] As a further solution of the present invention: the cylinder is provided with a groove on one side of the ring, and movable frames are axially symmetrically slidably arranged on both sides of the groove, a clamping plate is fixedly arranged on one side of the movable frame, and a rotating plate is movably arranged on the side of the movable frame away from the clamping plate, and a square block is rotatably connected to one end of the rotating plate away from the movable frame, and the square block is slidably connected to the groove.

[0014] As a further solution of the present invention: a limiting frame is fixedly provided at one end of the square block away from the rotating plate, the limiting frame is slidably connected to the slot, a rotating rod is movably provided on one side of the limiting frame and the two are threadedly connected, a positioning gear is fixedly provided on the end of the rotating rod, a positioning rack is fixedly provided on one side of the movable rack, and the positioning rack is meshed with the positioning gear for transmission.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) Through the clever coordination of the arc plate, arc groove, round rod and ring, the ring and the recording pen are driven to rotate synchronously during the airbag inflation process, so that the trajectory is accurately depicted on the recording board, providing an intuitive way for operators to observe and analyze data;

[0017] (2) With the coordinated work of the movable rod, positioning rod, card plate, movable plate, transverse rod and reset rod, it is ensured that the recording board can effectively contact the wiping pad to remove surface impurities when approaching the cylinder, thus optimizing the data collection environment. At the same time, it can cleverly avoid the wiping pad during the evacuation process, thus protecting the recorded information from accidental interference;

[0018] (3) The combined design of the mobile frame, rotating plate and clamping plate is intended to provide reliable fixed support for the recording board before data recording, ensure the stability of the recording board during the entire measurement process, and improve data accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 for Figure 1 Enlarged schematic diagram of part A in the middle.

[0021] Figure 3Schematic diagram of the cross plate in the present invention.

[0022] Figure 4 It is Figure 3 Enlarged schematic diagram of part B in it.

[0023] Figure 5 Schematic diagram of the structure of a single cylinder in the present invention.

[0024] Figure 6 Schematic diagram of the positional relationship between the wiping pad and the recording pen in the present invention.

[0025] Figure 7 Schematic diagram of the structure of the positioning rack in the present invention.

[0026] Figure 8 Schematic diagram of the structure of the positioning spring in the present invention.

[0027] Figure 9 Schematic diagram of the positional relationship between the limiting rod and the limiting plate in the present invention.

[0028] Figure 10 Schematic diagram of the structure of the transverse groove in the present invention.

[0029] Figure 11 Schematic diagram of the positional relationship between the inclined plate and the reset rod in the present invention.

[0030] Figure 12 Schematic diagram of the structure of the groove in the present invention.

[0031] Figure 13 Schematic diagram of the structure of the clamping plate in the present invention.

[0032] In the figure: 1, fixed plate; 2, airbag assembly; 3, positioning plate; 4, moving plate; 5, vertical plate; 6, cylinder; 61, notch; 62, groove; 7, detection assembly; 71, ring; 72, round rod; 73, recording pen; 74, recording board; 8, arc plate; 81, arc groove; 9, lead screw; 10, moving block; 11, cross bar; 12, fixed block; 13, movable block; 14, positioning spring; 15, moving rack; 16, rotating gear; 17, cross plate; 18, wiping pad; 19, fixed frame; 20, movable rod; 21, limiting plate; 211, inclined groove; 22, first spring; 23, movable plate; 231, positioning groove; 232, reset groove; 233, transverse groove; 24, positioning rod; 25, clamping plate; 26, inclined plate; 27, transverse moving rod; 28, reset rod; 29, second spring; 30, vertical rod; 31, reset spring; 32, connecting rod; 33, connecting plate; 331, notch; 34, moving frame; 35, clamping plate; 36, rotating plate; 37, square block; 38, limiting frame; 39, rotating rod; 40, positioning gear; 41, positioning rack; 42, limiting rod. Detailed implementation manners

[0033] Please refer to Figures 1 - 13 In an embodiment of the present invention, an automotive airbag multi-point impact detection device includes a fixing plate 1, on which an airbag assembly 2 is movably clamped. On one side of the fixing plate 1, a positioning plate 3 is provided. A plurality of moving plates 4 are slidably arranged on the positioning plate 3. On the side of the positioning plate 3 away from the fixing plate 1, a vertical plate 5 is provided. On the side of the vertical plate 5 close to the positioning plate 3, a cylinder 6 is fixedly arranged. On one side of the cylinder 6, a detection component 7 is provided. One end of the moving plate 4 close to the vertical plate 5 is fixedly provided with an arc plate 8, and the arc plate 8 is slidably connected to the cylinder 6 and is in transmission connection with the detection component 7. The airbag assembly 2 to be detected is clamped and installed on the fixing plate 1. Triggering the inflation of the airbag assembly 2 will push the moving plate 4 to move relative to the positioning plate 3. When the moving plate 4 moves away from the fixing plate 1, it will drive the arc plate 8 to move along the cylinder 6. During the movement of the arc plate 8 along the cylinder 6, it will drive the detection component 7 to work, thereby recording the moving distance of the moving rod. The vertical plate 5 provides a supporting role for the cylinder 6. The movement of multiple moving plates 4 can detect the inflation performance of the airbag assembly 2 at multiple points.

[0034] Refer to Figures 2 - 5 As shown, in this embodiment, preferably, the detection component 7 includes a ring 71, which is movably sleeved outside the cylinder 6. There are a plurality of rings 71. An arc groove 81 is opened on the outside of the arc plate 8. Inside each ring 71, a round rod 72 is fixedly arranged, and the round rod 72 is slidably fitted with the arc groove 81. On one side of the ring 71, a recording pen 73 is fixedly arranged. On one side of the cylinder 6, a recording board 74 is provided, and the recording pen 73 is in movable contact with the recording board 74. The movement of the moving plate 4 will drive the arc plate 8 to move along the cylinder 6. During the movement of the arc plate 8, the movement of the arc groove 81 will successively drive a plurality of round rods 72 and rings 71 to rotate 90 degrees around the cylinder 6. During the rotation of the ring 71, it will drive the recording pen 73 to rotate, and the rotation of the recording pen 73 will leave a rotation track on the recording board 74 on one side. Through the rotation track, the rotation amplitude of the ring 71 can be more clearly observed. The rotation amplitude of the ring 71 can reflect the moving distance of the moving rod along the cylinder 6. In this step, the moving distance of the moving rod is converted into the rotation amplitude of the ring 71, which is clearer and more obvious for the operator to count data. The track of the recording pen 73 on the recording board 74 is an arc. Analyzing the arc can better study the performance of the airbag. The track mark left by the marking pen on the recording board 74 is persistent and can be used as an important basis for subsequent data analysis and comparison.

[0035] Refer to Figures 4 - 8As shown, in this embodiment, preferably, a notch 61 is formed in the center of the cylinder 6, a lead screw 9 is rotatably arranged in the notch 61, one end of the lead screw 9 movably penetrates through the cylinder 6, and a moving block 10 is movably sleeved outside the end. A cross bar 11 is fixedly arranged on one side of the moving block 10. One end of the cross bar 11 away from the moving block 10 movably penetrates through the side wall of the cylinder 6. A fixed block 12 is fixedly arranged on one side of the moving block 10. A movable block 13 is slidably arranged in the fixed block 12. One end of the movable block 13 away from the fixed block 12 is fixedly connected to the recording board 74. A positioning spring 14 is fixedly connected between the movable block 13 and the fixed block 12. Before the airbag expands, the recording board 74 is not aligned with the recording pen 73, and the recording board 74 is away from the cylinder 6. After the airbag expands, it will drive the moving plate 4 and the arc plate 8 to move. Before the arc plate 8 reaches the position where the circular ring 71 is located, rotate the lead screw 9. The rotation of the lead screw 9 in the notch 61 will drive the moving block 10, the fixed block 12, the movable block 13, the positioning spring 14 and the recording board 74 to move together in the direction close to the cylinder 6. After the recording board 74 reaches one side of the recording pen 73, stop rotating the lead screw 9. Subsequently, the arc groove 81 of the arc plate 8 will abut against the round rod 72 to drive the circular ring 71 to rotate by 90 degrees, and the recording pen 73 will leave a trajectory record on the recording board 74. The cross bar 11 will also move relative to the cylinder 6 during the movement of the moving block 10. This is to prevent the moving block 10 from rotating along with the rotation of the lead screw 9 during the movement. When the airbag deflates, rotating the lead screw 9 in the reverse direction will drive the recording board 74 to move away from the cylinder 6 until it moves to the initial position. At this time, the recording board 74 is located on one side of the cylinder 6, which is more convenient for the operator to statistically analyze the data.

[0036] Refer to Figure 7 As shown, in this embodiment, preferably, a moving rack 15 is fixedly arranged on one side of the arc plate 8. The moving rack 15 is slidably connected to the notch 61. A rotating gear 16 is fixedly sleeved outside the lead screw 9. The rotating gear 16 is movably arranged in the notch 61. The moving rack 15 is meshed with the rotating gear 16 for transmission. When the airbag expands, the arc plate 8 will move along the cylinder 6. During the movement, it will drive the moving rack 15 to move. The moving rack 15 will first be meshed with the rotating gear 16 to drive the rotating gear 16 to rotate. The rotation of the rotating gear 16 will drive the lead screw 9 to rotate. The rotation of the lead screw 9 will drive the recording board 74 to move to one side of the recording pen 73 for convenient trajectory recording. Subsequently, the moving rack 15 will be disengaged from the rotating gear 16. Immediately afterwards, the arc groove 81 of the arc plate 8 will contact the round rod 72 to drive the circular ring 71 and the recording pen 73 to rotate, thus leaving a trajectory on the recording board 74.

[0037] Refer to Figure 1 、 Figure 3 and Figures 5 - 6As shown, in this embodiment, preferably, a cross plate 17 is fixedly arranged on the positioning plate 3, and a plurality of wiping pads 18 are fixedly arranged at the bottom of the cross plate 17. The horizontal distance between the wiping pads 18 and the recording plate 74 is greater than the horizontal distance between the recording pen 73 and the recording plate 74, and the wiping pads 18 are in movable abutment with the recording plate 74; when the airbag expands, the movable block 13 and the recording plate 74 are pulled in a direction away from the fixed block 12, and the positioning spring 14 is in a stretched state. At this time, the recording plate 74 is flush with the wiping pads 18. When the recording plate 74 moves in a direction close to the cylinder 6, it will abut against the wiping pads 18, and the wiping pads 18 can wipe off foreign matters (such as dust or the tracks left by the recording pen 73 during the previous detection) on the recording plate 74. After the entire recording plate 74 comes into contact with the wiping pads 18, the force applied to the recording plate 74 is released, and under the action of the positioning spring 14, the movable block 13 and the recording plate 74 will be driven to move in a direction close to the fixed block 12 so that the recording plate 74 is flush with the recording pen 73. Then, the recording plate 74 is continuously moved to one side of the recording pen 73, and then the arc-shaped groove 81 will contact the round rod 72, thereby driving the ring 71 to rotate, so that the recording pen 73 leaves a track on the recording plate 74. The cross plate 17 provides a supporting function for the wiping pads 18. When the airbag expansion ends, the recording plate 74 is moved in a direction away from the cylinder 6. At this time, the recording plate 74 is not flush with the wiping pads 18, and the wiping pads 18 will not contact the recording plate 74 during the movement, so as to avoid the wiping pads 18 "damaging" the track data on the recording plate 74. There also needs to be a certain horizontal distance between the wiping pads 18 and the recording pen 73, that is, after the slender part at the bottom of the recording plate 74 is disengaged from the wiping pads 18, it still needs to move a certain distance in the direction of the recording pen 73, and no collision with the recording pen 73 should occur during this process.

[0038] Refer to Figures 9 - 10As shown, in this embodiment, preferably, a plurality of fixing frames 19 are fixedly arranged at the bottom of the cross plate 17 on one side of the wiping pad 18. A movable rod 20 is horizontally movably penetrated through one side of the fixing frame 19. A limiting plate 21 is fixedly arranged at one end of the movable rod 20 close to the recording plate 74. An inclined groove 211 is formed at one end of the limiting plate 21 away from the wiping pad 18. A first spring 22 is fixedly arranged between the movable rod 20 and the inner wall of the fixing frame 19. A limiting rod 42 is fixedly arranged at the top of the recording plate 74. The limiting rod 42 is movably abutted against the inclined groove 211. When the recording plate 74 moves in the direction close to the cylinder 6, the limiting rod 42 will be driven to move together. At this time, the end of the limiting rod 42 away from the recording plate 74 is flush with the higher part of the inclined groove 211. Move the movable rod 20 in the direction close to the limiting rod 42. The movable rod 20 will drive the limiting plate 21 to move in the direction close to the limiting rod 42 until the lower part of the inclined groove 211 is flush with the limiting rod 42, and then stop moving the movable rod 20 and maintain this state. During this process, the first spring 22 will be compressed. Subsequently, during the movement of the recording plate 74, the limiting rod 42 will be driven to move along the lower part of the inclined groove 211 to the higher part. During this process, the limiting rod 42 and the recording plate 74 will be driven to move in the direction close to the wiping pad 18 until the recording plate 74 is flush with the wiping pad 18. During this process, the positioning spring 14 will be stretched. Subsequently, the limiting rod 42 will move along the higher part of the inclined groove 211. During this process, the recording plate 74 will not move and will be abutted against the wiping pad 18 to wipe off dust and other foreign objects on itself. When the recording plate 74 is not abutted against the wiping pad 18, the acting force applied to the movable rod 20 is also released. Under the action of the first spring 22, the movable rod 20 and the limiting plate 21 will be driven to move in the direction away from the limiting rod 42. Due to the loss of the extrusion acting force of the limiting plate 21, under the action of the positioning spring 14, the recording plate 74 will be driven to move in the direction away from the wiping pad 18 until the recording plate 74 is flush with the recording pen 73. Subsequently, the recording pen 73 can record the trajectory of the recording plate 74. The fixing frame 19 provides a supporting function for the movable rod 20.

[0039] Refer to Figures 9 - 11As shown, in this embodiment, preferably, a movable plate 23 is movably arranged in the fixed frame 19. Positioning grooves 231 and reset grooves 232 are respectively formed on both sides of the movable plate 23. A positioning rod 24 is fixedly arranged at the bottom of the movable rod 20. A clamping plate 25 is fixedly arranged in the positioning groove 231 of the movable plate 23. The positioning rod 24 is slidably connected with the positioning groove 231 and is movably clamped with the clamping plate 25. An inclined plate 26 is fixedly arranged in the reset groove 232 of the movable plate 23. A transverse movement rod 27 is movably penetrated through the fixed frame 19 above the inclined plate 26. A reset rod 28 is fixedly arranged at the bottom of the transverse movement rod 27. The reset rod 28 is slidably connected with the reset groove 232 and is movably abutted against the inclined plate 26. A second spring 29 is fixedly arranged between the transverse movement rod 27 and the inner wall of the fixed frame 19; when the airbag expands, the recording plate 74 will move towards the direction close to the cylinder 6. First, move the movable rod 20 towards the direction close to the limiting rod 42 so that the lower part of the limiting plate 21 is flush with the limiting rod 42. The movement of the movable rod 20 will also drive the positioning rod 24 to move along the positioning groove 231. During this process, the positioning rod 24 will first slide and fit with the inclined opening arranged on the clamping plate 25, thereby driving the clamping plate 25 and the movable plate 23 to move horizontally along the fixed frame 19 until the positioning rod 24 no longer contacts the inclined opening part. Subsequently, move the movable plate 23 and the clamping plate 25 in the reverse direction to the initial position. At this time, the positioning rod 24 will be clamped with the clamping plate 25. At this time, the movable rod 20 and the limiting plate 21 will maintain a stable state. Subsequently, the recording plate 74 will drive the limiting rod 42 to abut against the limiting plate 21, so that the limiting rod 42 and the recording plate 74 move to facilitate abutting against the wiping pad 18. When the recording plate 74 no longer contacts the wiping pad 18, move the transverse movement rod 27 towards the direction close to the limiting rod 42. The transverse movement rod 27 will drive the reset rod 28 to move along the reset groove 232, which will drive the inclined plate 26 and the movable plate 23 to move. This process will compress the second spring 29. The movement of the movable plate 23 will drive the clamping plate 25 on the other side to move, so that the clamping plate 25 is disengaged from the clamping connection with the positioning rod 24. Subsequently, under the action of the first spring 22, the limiting plate 21 will be driven to no longer abut against the limiting rod 42. The recording plate 74 will move towards the direction close to the fixed frame 19 to be flush with the recording pen 73, which is convenient for the recording pen 73 to record its trajectory.

[0040] Refer to Figures 10 - 11As shown, in this embodiment, preferably, a horizontal groove 233 is formed in the movable plate 23, a vertical rod 30 is fixedly arranged on the fixed frame 19, the vertical rod 30 is slidably connected to the horizontal groove 233, a return spring 31 is fixedly arranged between the vertical rod 30 and the movable plate 23, a connecting rod 32 is fixedly arranged on one side of the recording plate 74, a connecting plate 33 is fixedly arranged at one end of the connecting rod 32 away from the recording plate 74, notches 331 are formed on both sides of the connecting plate 33, and one ends of the movable rod 20 and the transverse moving rod 27 are both in movable abutment with the notches 331; in the initial state, both the first spring 22 and the second spring 29 are in the normal telescopic state. When the airbag expands, the recording plate 74 moves towards the direction close to the cylinder 6. The movement of the recording plate 74 will drive the connecting rod 32 and the connecting plate 33 to first abut against the movable rod 20. The abutment of the notch 331 of the connecting plate 33 with the movable rod 20 will drive the movable rod 20 to move towards the direction close to the limiting rod 42, so that the positioning rod 24 abuts against the clamping plate 25. During the sliding along the inclined opening on the clamping plate 25, it will drive the clamping plate 25 and the movable plate 23 to move. During this process, the return spring 31 will be stretched. The horizontal groove 233 is to prevent the movable plate 23 from colliding with the vertical rod 30 during the movement. When the positioning rod 24 no longer contacts the inclined opening of the clamping plate 25, under the action of the return spring 31, it will drive the movable plate 23 and the clamping plate 25 to move to the initial position, so that the clamping plate 25 is clamped with the positioning rod 24. In this way, it can be ensured that the limiting rod 42 can abut against the limiting plate 21 during the movement of the recording plate 74. Subsequently, when the recording plate 74 no longer contacts the wiping pad 18, the notch 331 of the connecting plate 33 will abut against the transverse moving rod 27, so that the transverse moving rod 27 moves towards the direction close to the limiting rod 42. The movement of the transverse moving rod 27 will drive the return rod 28 to move and abut against the inclined plate 26, driving the inclined plate 26, the movable plate 23 and the clamping plate 25 to move, so that the clamping plate 25 is disengaged from the clamping with the positioning rod 24. Under the action of the first spring 22, it will drive the limiting plate 21 to move reversely to the initial position. In this way, the recording plate 74 can also move to the initial position, facilitating the track recording by the recording pen 73. In addition, during the return process of the recording plate 74, the limiting rod 42 will not abut against the limiting plate 21 either. In this way, it is avoided to contact the wiping pad 18, ensuring that the track on the recording plate 74 is not "destroyed".

[0041] Refer to Figures 12 - 13As shown, in this embodiment, preferably, a groove 62 is formed on one side of the cylinder 6. On both sides of the groove 62, moving frames 34 are symmetrically and axially slidably arranged. On one side of the moving frame 34, a clamping plate 35 is fixedly arranged. On the side of the moving frame 34 away from the clamping plate 35, a rotating plate 36 is movably arranged. One end of the rotating plate 36 away from the moving frame 34 is rotatably connected to a square block 37, and the square block 37 is slidably connected to the groove 62. During the meshing process of the moving rack 15 and the rotating gear 16, the recording plate 74 will be driven to move towards the cylinder 6. After the recording plate 74 stops moving, the bottom of the recording plate 74 will be located between the two clamping plates 35. Move the square block 37 in the direction away from the recording plate 74. The movement of the square block 37 in the groove 62 will drive the two rotating plates 36 to rotate, so that the two moving frames 34 move towards each other, and the moving frames 34 will drive the two clamping plates 35 to approach each other to clamp and fix the recording plate 74, so that the recording plate 74 can be kept stable when the recording pen 73 slides on the recording plate 74.

[0042] Refer to Figure 7 and Figure 13 As shown, in this embodiment, preferably, a limiting frame 38 is fixedly arranged at one end of the square block 37 away from the rotating plate 36. The limiting frame 38 is slidably connected to the notch 61. A rotating rod 39 is movably arranged through one side of the limiting frame 38 and is threadedly and adaptively connected to the limiting frame 38. A positioning gear 40 is fixedly arranged at the end of the rotating rod 39. A positioning rack 41 is fixedly arranged on one side of the moving rack 15, and the positioning rack 41 is in meshing transmission with the positioning gear 40. During the meshing process of the moving rack 15 and the rotating gear 16, the recording plate 74 will be driven to move towards the cylinder 6. After the moving rack 15 and the rotating gear 16 are no longer in contact, the arc-shaped plate 8 continues to move, which will cause the positioning rack 41 and the positioning gear 40 to mesh, driving the positioning gear 40 and the rotating rod 39 to rotate. Since the rotating rod 39 is threadedly and adaptively connected to the limiting frame 38, the rotation of the rotating rod 39 will drive the limiting frame 38 to move towards the positioning gear 40, causing the square block 37 to move, and finally realizing the effect of clamping the recording plate 74 by the clamping plate 35. Subsequently, the movement of the arc-shaped plate 8 will drive the ring 71 and the recording pen 73 to rotate through the arc-shaped groove 81.

[0043] The working principle of the present invention is as follows: The airbag assembly 2 to be detected is snap-fitted and installed on the fixed plate 1. Triggering the inflation of the airbag assembly 2 will push the moving plate 4 to move relative to the positioning plate 3. When the moving plate 4 moves away from the fixed plate 1, it will drive the arc plate 8 to move along the cylinder 6. During the movement, the moving rack 15 will be driven to move. The moving rack 15 will first engage with the rotating gear 16 to drive the rotating gear 16 to rotate. The rotation of the rotating gear 16 will drive the screw rod 9 to rotate. The rotation of the screw rod 9 will drive the recording plate 74 to move towards the cylinder 6. The movement of the recording plate 74 will drive the connecting rod 32 and the connecting plate 33 to first abut against the movable rod 20. The abutment at the notch 331 of the connecting plate 33 with the movable rod 20 will drive the movable rod 20 to move towards the limiting rod 42, so that the positioning rod 24 will abut against the clamping plate 25. During the sliding along the inclined opening on the clamping plate 25, the clamping plate 25 and the movable plate 23 will be driven to move. During this process, the return spring 31 will be stretched. The transverse groove 233 is to prevent the movable plate 23 from colliding with the vertical rod 30 during its movement. When the positioning rod 24 no longer contacts the inclined opening of the clamping plate 25, under the action of the return spring 31, the movable plate 23 and the clamping plate 25 will be driven to move to the initial position, so that the clamping plate 25 is snap-fitted with the positioning rod 24. In this way, it can be ensured that the limiting rod 42 can abut against the limiting plate 21 during the movement of the recording plate 74, and the limiting rod 42 and the recording plate 74 can be driven to be flush with the wiping pad 18. The wiping pad 18 can wipe off foreign matters (such as dust or traces left by the recording pen 73 during the previous detection) on the recording plate 74. Subsequently, when the recording plate 74 no longer contacts the wiping pad 18, the notch 331 of the connecting plate 33 will abut against the transverse moving rod 27, causing the transverse moving rod 27 to move towards the limiting rod 42. The movement of the transverse moving rod 27 will drive the reset rod 28 to move and abut against the inclined plate 26, driving the inclined plate 26, the movable plate 23 and the clamping plate 25 to move, so that the clamping plate 25 is disengaged from the snap-fit with the positioning rod 24. Under the action of the first spring 22, the limiting plate 21 will be driven to move reversely to the initial position. In this way, the recording plate 74 can also be moved to the initial position, facilitating the recording pen 73 to record its trajectory. In addition, during the return process of the recording plate 74, the limiting rod 42 will not abut against the limiting plate 21 either, thus avoiding contact with the wiping pad 18 and ensuring that the trajectory on the recording plate 74 is not "destroyed". During the engagement of the moving rack 15 with the rotating gear 16, the recording plate 74 will be driven to move towards the cylinder 6. After the moving rack 15 no longer contacts the rotating gear 16, the continuous movement of the arc plate 8 will cause the positioning rack 41 to engage with the positioning gear 40, thereby driving the positioning gear 40 and the rotating rod 39 to rotate. Since the rotating rod 39 is threadedly and adaptively connected to the limiting frame 38, the rotation of the rotating rod 39 will drive the limiting frame 38 to move towards the positioning gear 40, so that the square block 37 moves, and finally the clamping plate 35 clamps the recording plate 74. Subsequently, the movement of the arc plate 8 will drive the circular ring 71 and the recording pen 73 to rotate through the arc groove 81.

Claims

1. A multi-point impact detection device for an automobile airbag, comprising a fixing plate (1), characterized in that: An airbag assembly (2) is movably mounted on the fixed plate (1), a positioning plate (3) is disposed on one side of the fixed plate (1), a plurality of movable plates (4) are slidably disposed on the positioning plate (3), a vertical plate (5) is disposed on the side of the positioning plate (3) away from the fixed plate (1), a cylinder (6) is fixedly disposed on the side of the vertical plate (5) close to the positioning plate (3), a detection component (7) is disposed on one side of the cylinder (6), an arc plate (8) is fixedly disposed on one end of the movable plate (4) close to the vertical plate (5), the arc plate (8) is slidably connected to the cylinder (6) and is transmission-connected to the detection component (7), the detection component (7) comprises a circular ring (71), the circular ring (71) is movably sleeved on the outer side of the cylinder (6), and the circular ring (71) is provided There are multiple arc-shaped plates (8) with arc-shaped grooves (81) on the outer side, and a round rod (72) is fixedly arranged on the inner side of each circular ring (71), and the round rod (72) is slidingly fitted with the arc-shaped groove (81). A recording pen (73) is fixedly arranged on one side of the circular ring (71), and a recording plate (74) is arranged on one side of the cylinder (6), and the recording pen (73) and the recording plate (74) are movably abutted, and a transverse plate (17) is fixedly arranged on the positioning plate (3), and a plurality of wiping pads (18) are fixedly arranged on the bottom of the transverse plate (17), and the lateral distance between the wiping pad (18) and the recording plate (74) is greater than the lateral distance between the recording pen (73) and the recording plate (74), and the wiping pad (18) and the recording plate (74) are movably abutted.

2. The automobile airbag multi-point impact detection device according to claim 1, characterized in that: A notch (61) is provided at the center of the cylinder (6), a screw rod (9) is rotatably arranged in the notch (61), one end of the screw rod (9) movably passes through the cylinder (6) and a moving block (10) is movably sleeved on the outer side of the end, a cross bar (11) is fixedly arranged on one side of the moving block (10), one end of the cross bar (11) away from the moving block (10) movably passes through the side wall of the cylinder (6), a fixed block (12) is fixedly arranged on one side of the moving block (10), a movable block (13) is slidably arranged in the fixed block (12), one end of the movable block (13) away from the fixed block (12) is fixedly connected to the recording plate (74), and a positioning spring (14) is fixedly connected between the movable block (13) and the fixed block (12).

3. The automobile airbag multi-point impact detection device according to claim 2, characterized in that: A movable rack (15) is fixedly arranged on one side of the arc-shaped plate (8), and the movable rack (15) is slidably connected to the notch (61). A rotating gear (16) is fixedly sleeved on the outer side of the screw rod (9), and the rotating gear (16) is movably arranged in the notch (61). The movable rack (15) and the rotating gear (16) are meshed and transmitted.

4. The automobile airbag multi-point impact detection device according to claim 1, characterized in that: A plurality of fixed frames (19) are fixedly arranged at the bottom of the transverse plate (17) on one side of the wiping pad (18); a movable rod (20) is movably arranged on one side of the fixed frame (19) in a transverse direction; a limit plate (21) is fixedly arranged at one end of the movable rod (20) close to the recording plate (74); an inclined groove (211) is provided at one end of the limit plate (21) away from the wiping pad (18); a first spring (22) is fixedly arranged between the movable rod (20) and the inner wall of the fixed frame (19); a limit rod (42) is fixedly arranged at the top of the recording plate (74); and the limit rod (42) is movably abutted against the inclined groove (211).

5. The automobile airbag multi-point impact detection device according to claim 4, characterized in that: A movable plate (23) is movably arranged in the fixed frame (19), and positioning grooves (231) and reset grooves (232) are respectively provided on both sides of the movable plate (23). A positioning rod (24) is fixedly arranged at the bottom of the movable rod (20), and a clamping plate (25) is fixedly arranged in the positioning groove (231) of the movable plate (23). The positioning rod (24) is slidably connected to the positioning groove (231) and is movably clamped to the clamping plate (25). The movable plate (23 ) is fixedly provided with an inclined plate (26) in the reset groove (232), the fixed frame (19) is located above the inclined plate (26) and is movably provided with a transverse rod (27) passing through, a reset rod (28) is fixedly provided at the bottom of the transverse rod (27), the reset rod (28) is slidably connected to the reset groove (232) and movably abuts against the inclined plate (26), and a second spring (29) is fixedly provided between the transverse rod (27) and the inner wall of the fixed frame (19).

6. The automobile airbag multi-point impact detection device according to claim 5, characterized in that: The movable plate (23) is provided with a transverse groove (233), the fixed frame (19) is fixedly provided with a vertical rod (30), the vertical rod (30) is slidably connected to the transverse groove (233), a return spring (31) is fixedly provided between the vertical rod (30) and the movable plate (23), a connecting rod (32) is fixedly provided on one side of the recording plate (74), a connecting plate (33) is fixedly provided at one end of the connecting rod (32) away from the recording plate (74), both sides of the connecting plate (33) are provided with notches (331), and one end of the movable rod (20) and the transverse rod (27) are movably abutted against the notch (331).

7. The automobile airbag multi-point impact detection device according to claim 3, characterized in that: The cylinder (6) is provided with a groove (62) on one side of the ring (71), and a movable frame (34) is axially symmetrically slidably arranged on both sides of the groove (62), a clamping plate (35) is fixedly arranged on one side of the movable frame (34), and a rotating plate (36) is movably arranged on the side of the movable frame (34) away from the clamping plate (35), and a square block (37) is rotatably connected to one end of the rotating plate (36) away from the movable frame (34), and the square block (37) is slidably connected to the groove (62).

8. The automobile airbag multi-point impact detection device according to claim 7, characterized in that: A limiting frame (38) is fixedly provided at one end of the square block (37) away from the rotating plate (36), and the limiting frame (38) is slidably connected to the notch (61). A rotating rod (39) is movably provided on one side of the limiting frame (38), and the two are threadedly connected. A positioning gear (40) is fixedly provided at the end of the rotating rod (39), and a positioning rack (41) is fixedly provided on one side of the movable rack (15), and the positioning rack (41) is meshed with the positioning gear (40) for transmission.

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