CN118514616A - A collision protection device for a driving recorder - Google Patents

Abstract

The present invention relates to a collision protection device for a driving recorder applied in the field of driving recorders. Under normal driving conditions, the recorder body is kept stable by plugging a rod and a coupling. When the vehicle encounters a rear-end collision, the arc plate moves forward, drives the rack to move through a linkage rope, and then drives the reset shaft to tilt the front guard plate forward to achieve protection. When the vehicle encounters a strong collision, the arc plate moves in the direction close to the recorder body, drives the extension rod to push the sliding block to move, so that the insertion rod falls into a drop groove, so that the recorder body can avoid rigid contact with the recorder body and the collision under subsequent collisions, thereby achieving collision protection. In addition, the air cylinder is connected with the buffer spring and the recorder body. After the rear-end collision, the diameter difference between the air inlet and the air outlet is used to slow down the reset speed of the arc plate, so that the front guard plate can maintain a forward tilted state for a longer time, thereby enhancing the collision protection effect.

Description

A collision protection device for a driving recorder

Technical Field

The invention relates to a driving recorder protection device, in particular to a driving recorder collision protection device applied in the driving recorder field.

Background Art

In today's era of rapid development of smart technology, driving recorders have become a must-have for drivers. They can not only record the driving process and provide strong evidence for traffic accidents, but also protect the rights and interests of drivers to a certain extent. When an accident occurs, the driving recorder will be deformed by pressure shock, so it is necessary to provide a collision protection device for the driving recorder.

The specification of Chinese invention patent CN202310584394.9 discloses a driving recorder with an anti-collision structure. Through the setting of the anti-collision component, the driving recorder can effectively buffer the impact force through the cooperation of various components during a collision, thereby providing anti-collision protection for the driving recorder, so that it can continue to work effectively after a collision, thereby extending its service life.

Existing dashcam collision protection devices usually use a buffer design to enhance the dashcam's own impact resistance. However, since the dashcam body is usually stably mounted on the car's front windshield, when encountering a collision with a large force, the external collision will cause a certain degree of damage to the dashcam body. In addition, when the car encounters a rear impact caused by a rear-end collision, the rear windshield will break and impact the mirror in front of the dashcam, which will also damage the safety of the dashcam body.

Summary of the invention

In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to provide a safe and effective collision protection measure for the driving recorder to cope with collision effects in different directions.

In order to solve the above problems, the present invention provides a collision protection device for a driving recorder, comprising a recorder body installed on the front windshield of a vehicle and a plurality of buffer springs installed on the back of the recorder body, the tail end of the buffer spring is connected with an arc plate, a connecting piece is installed above the recorder body through a coupling, a variable unit is symmetrically installed on the top of the recorder body, the variable unit comprises a constraint box, a sliding groove is provided inside the constraint box, a sliding block is slidably connected inside the sliding groove, a plug rod is arranged on the top of the sliding block, and the top end of the plug rod extends to the inside of the coupling, a symmetrically arranged extension rod is connected to the back of the sliding block, and the extension rod overlaps with the top end of the arc plate, a pressing spring is connected to the front of the sliding block, and the tail end of the pressing spring is connected to the inner wall of the sliding groove, a falling groove is provided inside the constraint box and is located directly below the plug rod, and the cross-sectional areas of the sliding block, the falling groove and the plug rod are gradually reduced;

The front inner wall of the recorder body is connected to the front protective plate through a reset shaft, and both ends of the reset shaft extend out of both sides of the recorder body. Gears are fixedly sleeved on the surfaces of both ends of the reset shaft, and a rack is meshed and connected below the gear. A linkage rope is connected to the back of the rack, and the tail end of the linkage rope is connected to the bottom of the arc plate surface.

In the above-mentioned collision protection device of the driving recorder, a safe and effective collision protection measure is provided for the recorder body by utilizing the cooperation of the rack, gear, linkage rope, arc plate, plug rod and coupling, so as to cope with collision effects in different directions.

As a further improvement of the present application, constraint blocks are connected to both side surfaces of the recorder body, and the constraint blocks are slidably connected to the surface of the rack. In the initial state, the tail end of the rack and the surface of the arc plate are located on the same horizontal line, and the length of the linkage rope in the initial state is equal to the horizontal distance between the tail end of the rack and the bottom of the arc plate surface.

As a further improvement of the present application, a restraining rope is installed on the front of the sliding block, and the length of the restraining rope is equal to the horizontal projection length of the extrusion spring in the initial state. The front protective plate and the arc plate are both made of lightweight and high-strength transparent materials.

As a further improvement of the present application, in the initial state, there is a gap between the tail end of the extension rod and the top of the arc plate, and the horizontal distance between the two extension rods is greater than the diameter of the insertion rod.

As a further improvement of the present application, the sliding block is staggered with the falling groove in the initial state, and the overlapping area between the sliding block and the falling groove in the vertical direction in the initial state is not less than half of the cross-sectional area of the sliding block itself.

As a further improvement of the present application, an anti-collision protection system is also included, which includes a processor installed on the recorder body, and the processor is connected to an obstacle avoidance module and a warning module. The obstacle avoidance module includes a camera and an image processing unit installed on one side of the back of the recorder body, which are used to detect obstacles in front of the vehicle in real time and calculate an obstacle avoidance path. When an imminent collision is detected, a signal is sent to the warning module.

As a further improvement of the present application, the obstacle avoidance module also includes a shooting lens installed on the front of the recorder body, which is used to record and view the vehicle status behind the vehicle, and when a rear-end collision is detected, a signal is sent to the warning module.

As another improvement of the present application, an air cylinder is connected between the buffer spring and the recorder body, and a piston disk with the same inner diameter as the air cylinder is slidably connected inside the air cylinder, and a connecting rod passing through the air cylinder is connected to the surface of the piston disk, and the tail end of the connecting rod is connected to the surface of the arc plate, and a protective frame is installed on the inner wall of the recorder body through an axis rod, and the protective frame is composed of multiple C-shaped protective frames made of transparent high-strength material connected in series on the surface of the axis rod, and a movable rope is connected to the interior of the protective frame, and the tail end of the movable rope is connected to the surface of the piston disk.

As another improvement supplement to the present application, the bottom of the air cylinder is provided with an arc-shaped depression away from the direction of the recorder body, and the tail end of the arc-shaped depression is on the same vertical axis as the axes of the air inlet and the air outlet, and the surface of the air cylinder is provided with an air outlet and an air inlet both of which are provided with a one-way valve inside, and the diameter of the air outlet is smaller than that of the air inlet.

As another improvement supplement of the present application, the distance between the installation position of the protection frame and the top wall of the recorder body is less than one quarter of the height of the recorder body itself.

To sum up, under normal driving conditions, the recorder body is kept stable by the insertion of the rod and the coupling. When the vehicle encounters a rear-end collision, the arc plate moves forward, and the rack is driven to move through the linkage rope, thereby driving the reset shaft to tilt the front guard plate forward to achieve protection. When the vehicle encounters a strong impact, the arc plate moves close to the recorder body, driving the extension rod to push the sliding block to move, exposing the fall groove, so that the insertion rod falls into the fall groove, releasing the restraining effect on the coupling, so that the recorder body can move in an arc under the subsequent impact and collision, so as to avoid rigid contact between the recorder body and the impact and collision, thereby playing a collision protection role. In addition, the air cylinder is connected to the buffer spring and the recorder body. After the rear-end collision, the diameter difference between the air inlet and the air outlet is used to slow down the reset speed of the arc plate, so that the front guard plate can remain in a forward tilted state longer, thereby enhancing the collision protection effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a diagram showing the overall appearance of a first embodiment of the present application;

FIG2 is a schematic diagram of the installation of a recorder body and a front protective plate according to a first embodiment of the present application;

FIG3 is an enlarged schematic diagram of point A in FIG2 of the present application;

FIG4 is a schematic diagram of the structure of the curved plate and the restraint box according to the first embodiment of the present application;

FIG5 is a top view of a constraint box according to a first embodiment of the present application;

FIG6 is a schematic diagram of the internal structure of the constraint box of the first embodiment of the present application;

7 is a state diagram of the recorder body of the first embodiment of the present application when encountering a collision with a vehicle in front;

FIG8 is an enlarged schematic diagram of point B in FIG7 of the present application;

FIG9 is a schematic diagram of the first embodiment of the present application, in which the curved plate moves away from the recorder body and drives the front guard plate to tilt forward;

FIG10 is an installation diagram of a protective frame, a movable cable and an air cylinder according to a second embodiment of the present application;

FIG11 is a schematic diagram of the structure of the gas cylinder and the piston disc according to the second embodiment of the present application;

FIG12 is a schematic diagram of a second embodiment of the present application showing a piston disc moving away from a recorder body;

FIG. 13 is a schematic diagram of the movement state of the piston disk approaching the recorder body in the second embodiment of the present application.

Description of the numbers in the figure:

1. Recorder body; 2. Buffer spring; 3. Arc plate; 4. Linkage rope; 5. Connector; 6. Coupling; 7. Front protective plate; 8. Gear; 9. Rack; 10. Constraint box; 11. Insert rod; 12. Extrusion spring; 13. Constraint rope; 14. Extension rod; 15. Sliding block; 16. Falling trough; 17. Air cylinder; 18. Piston disc; 19. Protective frame; 20. Movable rope.

DETAILED DESCRIPTION

Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

The first implementation method:

Fig. 1 to Fig. 6 show a collision protection device of a driving recorder, comprising a recorder body 1 installed on the front windshield of a vehicle and a plurality of buffer springs 2 installed on the back of the recorder body 1, the tail end of the buffer spring 2 is connected with an arc plate 3, a connecting member 5 is installed on the top of the recorder body 1 through a coupling 6, a variable unit is symmetrically installed on the top of the recorder body 1, and the variable unit comprises a constraint box 10, a sliding groove is provided inside the constraint box 10, a sliding block 15 is slidably connected inside the sliding groove, a plug rod 11 is arranged on the top of the sliding block 15, and the top end of the plug rod 11 extends to the inside of the coupling 6, a symmetrically arranged extension rod 14 is connected to the back of the sliding block 15, and the extension rod 14 overlaps with the top end of the arc plate 3, a compression spring 12 is connected to the front of the sliding block 15, and the tail end of the compression spring 12 is connected to the inner wall of the sliding groove, a falling groove 16 is provided inside the constraint box 10, which is located directly below the plug rod 11, and the cross-sectional areas of the sliding block 15, the falling groove 16 and the plug rod 11 are gradually reduced;

The front inner wall of the recorder body 1 is connected to the front protective plate 7 through a reset shaft, and both ends of the reset shaft extend out of both sides of the recorder body 1. Gears 8 are fixedly sleeved on the surfaces of both ends of the reset shaft, and a rack 9 is meshingly connected to the bottom of the gear 8. The back of the rack 9 is connected to a linkage rope 4, and the tail end of the linkage rope 4 is connected to the bottom of the surface of the arc plate 3.

Constraint blocks are connected to the two side surfaces of the recorder body 1, and the constraint blocks are slidably connected to the surface of the rack 9. In the initial state, the tail end of the rack 9 and the surface of the arc plate 3 are located on the same horizontal line, and the length of the linkage rope 4 in the initial state is equal to the horizontal distance between the tail end of the rack 9 and the bottom of the surface of the arc plate 3.

Specifically, when the recorder body 1 encounters a strong impact collision from the front of the vehicle, the impact will first contact the curved plate 3 after destroying the front windshield (the number of the curved plates 3 is multiple, because there are two couplings 6 and they are arranged in the middle position. In order to facilitate the viewing of the relationship between the curved plate 3 and the coupling 6 in the middle part, the curved plates 3 outside the two curved plates 3 in the middle are omitted), and the curved plates 3 are squeezed to approach the direction of the recorder body 1 under the action of the buffer spring 2. At this time, the top position of the surface of the curved plate 3 will hit the extension rod 14, and then push the sliding block 15 to compress the squeezing spring 12, and then expose the falling groove 16, so that the insertion rod 11 originally attached to the surface of the sliding block 15 automatically falls, and then loses the restraining effect on the coupling 6, so that the original stable connection relationship between the recorder body 1 and the connecting member 5, under the cooperation of the coupling 6 and the subsequent collision, the recorder body 1 can follow the collision to move, avoid rigid contact with the collision, so as to achieve a collision protection effect (as shown in Figures 7-8);

In order to achieve the subsequent resetting of the plug rod 11, the plug rod 11 can be made of a magnetic material, and an electromagnetic block that repel the magnetic force of the plug rod 11 is installed on the bottom wall of the drop groove 16. When resetting is required, the electromagnetic block is started to lift the plug rod 11 and re-insert it into the jack at the bottom of the coupling 6 on the surface of the recorder body 1 in a vertical state. Then, the sliding block 15 can be reset under the lifting of the plug rod 11, and then the electromagnetic block is turned off and the bottom of the plug rod 11 is re-attached to the surface of the sliding block 15;

When a rear-end collision occurs from behind the vehicle and the recorder body 1 is subjected to a collision (in this state, the insertion rod 11 maintains the insertion constraint with the coupling 6, so the recorder body 1 is in a stable state. When encountering a rear-end collision, due to the connection with the connecting member 5, the displacement amplitude of the recorder body 1 and the displacement amplitude of the arc plate 3 are different), the vehicle itself tilts forward due to the moment of the rear-end collision, thereby driving the arc plate 3 to move away from the recorder body 1. Under the action of the linkage rope 4, the rack 9 is driven to move in the same direction. Under the meshing action of the rack 9 and the gear 8, the reset shaft is driven to rotate, and then the front guard plate 7 is driven to tilt forward, thereby performing corresponding protective treatment (as shown in Figure 9).

Due to the length design of the linkage rope 4 in the initial state, the arc plate 3 will not push the rack 9 when encountering a collision from the front of the vehicle. At this time, the front guard plate 7 is in a vertical state. When encountering a rear-end collision from the rear, the arc plate 3 can drive the rack 9 to move at the moment of displacement, ensuring the accuracy of collision sensing.

In the initial state, there is a gap between the tail end of the extension rod 14 and the top of the arc plate 3, and the horizontal distance between the two extension rods 14 is greater than the diameter of the insertion rod 11. A restraint rope 13 is installed on the front of the sliding block 15, and the length of the restraint rope 13 is equal to the horizontal projection length of the extrusion spring 12 in the initial state. The front protective plate 7 and the arc plate 3 are both made of lightweight and high-strength transparent materials.

Specifically, the tail end of the extension rod 14 is in a non-contact state with the arc plate 3. Therefore, when the collision effect is insufficient, it can be buffered by the buffer spring 2 and the arc plate 3. When the collision effect is too strong, it will impact and drive the extension rod 14 to move. At the same time, when a rear-end collision occurs, when the arc plate 3 is displaced in different directions, it will not drive the sliding block 15 to move in the opposite direction. In addition, due to the limited length of the restraint rope 13, when encountering an impact collision from the front of the vehicle, it will not hinder the compression of the extrusion spring 12. When encountering a rear-end collision from the rear of the vehicle, the position of the sliding block 15 can be effectively maintained, thereby ensuring that the insertion rod 11 will not fall, thereby ensuring the stability of the insertion.

The sliding block 15 is displaced with the falling groove 16 in the initial state, and the overlapping area between the sliding block 15 and the falling groove 16 in the vertical direction in the initial state is not less than half of the cross-sectional area of the sliding block 15 itself.

Specifically, since there is an overlapping area between the sliding block 15 and the falling groove 16, when the top end of the subsequent arc plate 3 hits the extension rod 14, the sliding block 15 can be pushed to cover the falling groove 16 as quickly as possible, so that the insertion rod 11 can fall into the falling groove 16 as quickly as possible, releasing the constraint on the coupling 6.

It also includes an anti-collision protection system, which includes a processor installed on the recorder body 1, and the processor is connected to an obstacle avoidance module and a warning module. The obstacle avoidance module includes a camera and an image processing unit installed on one side of the back of the recorder body 1, which are used to detect obstacles in front of the vehicle in real time and calculate the obstacle avoidance path. When it is detected that a collision is about to occur, a signal is sent to the warning module.

The obstacle avoidance module also includes a camera installed on the front of the recorder body 1, which is used to record and view the vehicle status behind the vehicle, and send a signal to the warning module when a rear-end collision is detected.

Specifically, when performing obstacle avoidance detection, the anti-collision protection system can use a camera to capture the motion state of the vehicle and objects in front of the vehicle, and transmit the corresponding data to the image processing unit for analysis to determine whether there is a possibility of a front obstacle hitting the vehicle. When a front collision may occur, a signal is sent to the warning module and an alternative alternative path is sent to the on-board navigation connected to the vehicle signal, reminding the driver to change the driving path in time to reduce the possibility of a collision.

In addition, the rear camera captures the moving body behind the vehicle to determine the distance between the rear vehicle and the rear of the vehicle and the speed of the rear vehicle to determine whether a rear-end collision is likely to occur. When a rear-end collision is likely, the route is changed or other measures are taken to reduce the possibility of a rear-end collision.

The second implementation method:

Figures 10-11 show that an air cylinder 17 is connected between the buffer spring 2 and the recorder body 1, and a piston disk 18 with the same inner diameter as the air cylinder 17 is slidably connected inside the air cylinder 17, and a connecting rod passing through the air cylinder 17 is connected to the surface of the piston disk 18, and the tail end of the connecting rod is connected to the surface of the arc plate 3, and a protective frame 19 is installed on the inner wall of the recorder body 1 through an axial rod. The protective frame 19 is composed of a plurality of C-shaped protective frames made of transparent high-strength material connected in series on the surface of the axial rod, and a movable rope 20 is connected to the interior of the protective frame 19, and the tail end of the movable rope 20 is connected to the surface of the piston disk 18.

The bottom of the air cylinder 17 is provided with an arc-shaped depression away from the recorder body 1, and the tail end of the arc-shaped depression is on the same vertical axis as the axis of the air inlet and the air outlet. The surface of the air cylinder 17 is provided with an air outlet and an air inlet both of which are provided with a one-way valve inside, and the diameter of the air outlet is smaller than the air inlet.

The distance between the installation position of the protection frame 19 and the top wall of the recorder body 1 is less than one quarter of the height of the recorder body 1 itself.

Different from the first embodiment, this embodiment improves the forward tilting duration of the front fender 7 during a rear-end collision, and in this embodiment, the movable rope 20 remains stretched in the initial state (that is, the front fender 7 is in a vertical position), and the connecting rod and the air cylinder 17 are in a non-sealed sliding connection state.

Specifically, in the event of a rear-end collision, the arc plate 3 moves away from the recorder body 1 to drive the front guard plate 7 to tilt forward. However, after the rear-end collision effect disappears, under the action of the buffer spring 2 and the reset shaft, the forward tilt state between the front guard plate 7 and the recorder body 1 will be maintained for a short time, affecting the anti-collision protection effect.

In this embodiment, Figures 12-13 show that after the front guard plate 7 tilts forward for the first time, the piston disc 18 is moved under the action of the connecting rod, thereby achieving a suction effect, allowing external gas to enter the air cylinder 17, and then when the arc plate 3 returns, the connecting rod drives the piston disc 18 to reset, but due to the diameter difference between the air inlet and the air outlet, the exhaust speed of the arc plate 3 is slow during the reset process, thereby providing a certain resistance, and the reset speed of the arc plate 3 is slowed down, thereby maintaining the forward tilt state between the front guard plate 7 and the recorder body 1 for a longer time (in this process, the angle formed between the front guard plate 7 and the front of the recorder body 1 slowly decreases until the front guard plate 7 returns to a vertical state);

At the same time, when the vehicle is rear-ended or braked suddenly, the arc plate 3 moves, thereby driving the piston plate 18 to move, so that the movable rope 20 can be relaxed, and the protective frame 19 can be opened in the open space at the upper end of the front protective plate 7, thereby playing a supplementary protective effect. Moreover, due to the height limit of the protective frame 19, the protective frame 19 will not be affected by the narrower part of the lower part of the front protective plate 7 when forming a fan-shaped protective structure.

In summary, under normal driving conditions, the recorder body 1 is kept stable by the insertion of the rod 11 and the coupling 6. When the vehicle encounters a rear-end collision, the arc plate 3 moves forward, and the rack 9 is driven to move through the linkage rope 4, thereby driving the reset shaft to tilt the front guard plate 7 forward to achieve protection. When the vehicle encounters a strong impact, the arc plate 3 moves in the direction close to the recorder body 1, driving the extension rod 14 to push the sliding block 15 to move, exposing the falling groove 16, so that the insertion rod 11 falls into the falling groove 16, releasing the restraining effect on the coupling 6, so that the recorder body 1 can move in an arc under the subsequent impact and collision, so as to avoid rigid contact between the recorder body 1 and the impact and collision, thereby playing a collision protection role. In addition, the air cylinder 17 is connected to the buffer spring 2 and the recorder body 1. After the rear-end collision, the diameter difference between the air inlet and the air outlet is used to slow down the reset speed of the arc plate 3, so that the front guard plate 7 can maintain a forward tilted state longer, thereby enhancing the collision protection effect.

In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims (10)

1. A collision protection device for a driving recorder, comprising a recorder body (1) mounted on a front windshield of a vehicle and a plurality of buffer springs (2) mounted on the back of the recorder body (1), wherein the tail end of the buffer spring (2) is connected to an arc plate (3), and a connecting member (5) is mounted on the top of the recorder body (1) via a coupling member (6), characterized in that a variable unit is symmetrically mounted on the top of the recorder body (1), and the variable unit comprises a restraint box (10), a sliding groove is provided inside the restraint box (10), a sliding block (15) is slidably connected to the inside of the sliding groove, and the ... A plug rod (11) is arranged on the top of the block (15), and the top end of the plug rod (11) extends to the inside of the coupling (6); the back of the sliding block (15) is connected to a symmetrically arranged extension rod (14), and the extension rod (14) overlaps with the top end of the arc plate (3); the front of the sliding block (15) is connected to a compression spring (12), and the tail end of the compression spring (12) is connected to the inner wall of the sliding groove; the interior of the constraint box (10) is provided with a drop groove (16) located directly below the plug rod (11), and the cross-sectional areas of the sliding block (15), the drop groove (16) and the plug rod (11) gradually decrease; The front inner wall of the recorder body (1) is connected to a front protective plate (7) via a reset shaft, and both ends of the reset shaft extend out of both sides of the recorder body (1). Gears (8) are fixedly sleeved on both end surfaces of the reset shaft, and a rack (9) is meshingly connected below the gear (8). A linkage rope (4) is connected to the back of the rack (9), and the tail end of the linkage rope (4) is connected to the bottom of the surface of the arc plate (3). 2. A collision protection device for a driving recorder according to claim 1, characterized in that: both side surfaces of the recorder body (1) are connected with constraint blocks, and the constraint blocks are slidably connected to the surface of the rack (9), the rear end of the rack (9) and the surface of the arc plate (3) are located on the same horizontal line in the initial state, and the length of the linkage rope (4) in the initial state is equal to the horizontal distance between the rear end of the rack (9) and the bottom of the surface of the arc plate (3). 3. A dashcam collision protection device according to claim 1, characterized in that: a restraint rope (13) is installed on the front of the sliding block (15), and the length of the restraint rope (13) is equal to the horizontal projection length of the extrusion spring (12) in the initial state, and the front protective plate (7) and the curved plate (3) are both made of lightweight and high-strength transparent materials. 4. A dashcam collision protection device according to claim 1, characterized in that: in the initial state, there is a gap between the tail end of the extension rod (14) and the top of the arc plate (3), and the horizontal distance between the two extension rods (14) is greater than the diameter of the insertion rod (11). 5. A dashcam collision protection device according to claim 1, characterized in that: the sliding block (15) is staggered with the falling groove (16) in the initial state, and the overlapping area between the sliding block (15) and the falling groove (16) in the vertical direction in the initial state is not less than half of the cross-sectional area of the sliding block (15) itself. 6. A collision protection device for a driving recorder according to claim 1, characterized in that it also includes an anti-collision protection system, the anti-collision protection system includes a processor installed on the recorder body (1), the processor is connected to an obstacle avoidance module and a warning module, the obstacle avoidance module includes a camera and an image processing unit installed on one side of the back of the recorder body (1), which are used to detect obstacles in front of the vehicle in real time and calculate an obstacle avoidance path, and send a signal to the warning module when an impending collision is detected. 7. A collision protection device for a driving recorder according to claim 6, characterized in that: the obstacle avoidance module also includes a camera installed on the front of the recorder body (1), which is used to record and view the vehicle status behind the vehicle, and when a rear-end collision is detected, a signal is sent to the warning module. 8. A collision protection device for a driving recorder according to claim 1, characterized in that: an air cylinder (17) is connected between the buffer spring (2) and the recorder body (1), a piston disk (18) having the same inner diameter as the air cylinder (17) is slidably connected inside the air cylinder (17), and a connecting rod passing through the air cylinder (17) is connected to the surface of the piston disk (18), and the tail end of the connecting rod is connected to the surface of the arc plate (3), and a protective frame (19) is installed on the inner wall of the recorder body (1) through a shaft rod, and the protective frame (19) is composed of a plurality of C-shaped protective frames made of transparent high-strength material connected in series on the surface of the shaft rod, and a movable rope (20) is passed through the interior of the protective frame (19), and the tail end of the movable rope (20) is connected to the surface of the piston disk (18). 9. A collision protection device for a driving recorder according to claim 8, characterized in that: the bottom of the air cylinder (17) is provided with an arc-shaped depression away from the direction of the recorder body (1), and the tail end of the arc-shaped depression is on the same vertical axis as the axis of the air inlet and the air outlet, and the surface of the air cylinder (17) is provided with an air outlet and an air inlet both of which are provided with a one-way valve, and the diameter of the air outlet is smaller than that of the air inlet. 10. A collision protection device for a driving recorder according to claim 8, characterized in that the distance between the installation position of the protection frame (19) and the inner top wall of the recorder body (1) is less than one quarter of the height of the recorder body (1) itself.