Seat buffering device for safe driving of automobile and using method of seat buffering device

Abstract

The invention discloses a seat buffer device for safe driving of an automobile and a using method thereof, and relates to the technical field of automobile safety protection, the seat buffer device comprises a cushion, a backrest, a side protection assembly, a buffer assembly and an automatic control assembly, and the core innovation is that a multi-source sensor prejudges risks, and automatically triggers multi-scene buffer. Mechanical protection is matched with air bag dual protection during side collision, buffering force is amplified by a gear rack during vertical collision, stable protection is guaranteed through the structural guiding and limiting design, and the device is suitable for drivers and passengers of different weights. According to the seat buffer device for safe driving of the automobile and the using method thereof, the problems of passive protection, high damage rate and poor adaptability of a traditional seat are solved, air bag protection is started when the interior of a cab is subjected to side impact, a cushion is adjusted in a self-adaptive mode and a buffer structure is started when the interior of the cab is subjected to front-back impact, the injury rate of a driver and passengers is reduced, and safety is improved. The buffer protection response speed is high, and the system is suitable for various passenger vehicles and commercial vehicles and has safety, reliability and adaptability.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile safety protection, in particular to a seat cushion device for safe driving of an automobile and a use method thereof. BACKGROUND

[0002] The automobile driving seat is a core component of the automobile cabin, which has the functions of supporting the human body, relieving driving fatigue and ensuring driving safety. It is suitable for various types of vehicles such as passenger cars and commercial vehicles, and is widely used in daily commuting and long-distance transportation. The seat is mainly composed of a backrest, a cushion, a headrest, an adjusting mechanism and a safety protection assembly. The materials include real leather, imitation leather and fabric. Some high-end models use breathable mesh or heated and ventilated fabric. The adjusting function is rich, supporting forward and backward sliding, backrest angle, seat height and support adjustment. Some are equipped with electric adjustment, memory function and seat massage module. Its design follows ergonomics, disperses body pressure by optimizing the cushion arc and backrest fit, and is equipped with safety structures such as three-point seat belts and anti-slip cushions to effectively protect the driver and passengers in the event of a collision. However, the existing automobile driving seat still has some problems when in use.

[0003] For example, the application number 201620648234.1 discloses an automobile seat, which comprises a cushion, a back cushion and a headrest. The cushion comprises a raised portion and a recessed portion lower than the raised portion in the vertical direction. The back cushion comprises a relying portion for the user's back and a wrapping portion extending in the vertical direction on both sides of the relying portion. The seat further comprises a neck protection device, which comprises a control device, a driving device and a neck protector located between the headrest and the back cushion.

[0004] The existing seat cushion device has the following defects: most of them are passive cushioning structures that can only passively absorb energy after a collision occurs, with delayed cushioning response, and cannot predict risks in advance and prepare for protection. The cushioning effect is limited for high-speed collisions, and the risk of head and waist injury of the driver and passengers is still high. The body size and sitting posture of the driver and passengers adjust the cushioning stiffness and stroke in real time, resulting in uneven cushioning efficiency, and in some cases, the injury may be aggravated due to excessive or insufficient cushioning.

[0005] Therefore, in view of the above problems, the present application is developed through in-depth research.

[0006] In view of the above problems, the present application is designed on the basis of the original automobile seat. SUMMARY

[0007] The purpose of the present application is to provide a seat cushion device for safe driving of an automobile and a use method thereof to solve the problems raised in the background art.

[0008] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0009] A car seat cushioning device for safe driving includes a seat cushion and a backrest. An adjustment bracket is connected and installed between the seat cushion and the backrest, and a seat belt buckle is provided on the side of the adjustment bracket. A headrest is fixedly installed on the top of the backrest. Protective plates are provided on the front sides of the left and right sides of the backrest, and airbag outlets are provided on the rear sides of the protective plates. A compression rod is provided inside the backrest, and a telescopic rod is connected to the outer end of the compression rod. A first spur rack is fixedly connected to the outer end of the telescopic rod, and a first gear is meshed on the outer side of the first spur rack. The first gear is fixedly connected to the rear side of the protective plate. A multi-source sensor is provided on the rear side of the seat cushion, and a bottom plate and a top plate are provided inside the seat cushion. Connecting plates are hinged to the left and right sides of the bottom plate and the top plate. A slider is slidably connected to the upper surface of the bottom plate, and the slider is driven by a servo motor to form a forward and backward movement structure. A force-amplifying spring assembly is hinged above the slider, and the front side of the force-amplifying spring assembly is hinged to the bottom surface of the top plate.

[0010] Preferably, the backrest has a first cavity on both the left and right sides, and an airbag outlet is provided inside the first cavity. When the protective plate is opened, the safety airbag is triggered to pop out from the airbag outlet to form a protective structure on the left and right sides of the seat.

[0011] Using the above technical solution, the first cavity of the backrest accommodates the airbag, reducing the deviation of the airbag deployment path, improving the deployment response speed, triggering the airbag deployment when the protective plate opens, reducing the rate of human body compression injury during side collisions, and reducing the head tilt amplitude.

[0012] Preferably, the backrest has a second cavity in the middle, and the compression rod is fixedly installed inside the second cavity. The telescopic rod is slidably connected inside the sleeve, and the sleeve is fixedly installed inside the second cavity.

[0013] Using the above technical solution, the second cavity fixes the compression rod and the sleeve, the sleeve guides the telescopic rod to slide, the telescopic rod offset rate is reduced, ensuring precise meshing of the rack and pinion, and reducing the deviation of the opening angle of the protective plate.

[0014] Preferably, a first spring is connected between the end of the sleeve near the middle of the backrest and the outer end of the compression rod, and a first straight rack passes through the second cavity and the first cavity. First gears are fixedly installed on the upper and lower sides of the rear side of the protective plate, and a support rod is fixedly connected between the first gears.

[0015] By adopting the above technical solution, the first spring between the sleeve and the compression rod attenuates the initial impact force of the side collision, and the double first gears and support rods on the rear side of the protective plate improve the stability of the protective plate when it is opened, ensuring the continuity of protection.

[0016] Preferably, the multi-source sensor includes a pressure monitoring unit, an attitude monitoring unit, and a distance monitoring unit, and the image acquisition camera connected to the distance monitoring unit is installed at the rear of the vehicle. The multi-source sensor signal is connected to a controller, and the controller controls the start and stop of the servo motor.

[0017] By adopting the above technical solution, the three monitoring units of multi-source sensors improve the accuracy of risk prediction. The sensors and controller are linked with servo motors to realize automatic buffering triggering, avoid human operation delays during collisions, and adapt to drivers and passengers of different body types.

[0018] Preferably, the output end of the servo motor is connected to a threaded rod, and a slider is threadedly connected to the outside of the threaded rod. The bottom of the slider is slidably connected to the top of the slide rail, and the slide rail is fixedly installed in the middle of the upper surface of the base plate.

[0019] Using the above technical solution, the servo motor rotates to drive the slider to move, improving the slider's movement accuracy. The slide rail guides the slider to slide, reducing the slider's movement resistance and increasing the response speed, ensuring that the force-boosting spring assembly is triggered and buffered in a timely manner.

[0020] Preferably, a first movable frame is provided on the rear side inside the force-amplifying spring assembly, and a first hinge is provided on the rear side of the first movable frame, which is connected to the top of the slider. A second hinge is provided on the front side of the force-amplifying spring assembly, which is connected to the bottom surface of the top plate. A second movable frame is provided on the front side inside the force-amplifying spring assembly, and the upper and lower sides of the first and second movable frames are slidably connected to the sliding groove inside the shell of the force-amplifying spring assembly. A slot is provided above the first movable frame, and the rear side of the top surface of the second movable frame is slidably connected to the slot.

[0021] By adopting the above technical solution, the first and second moving frames in the force-enhancing spring assembly slide together, the buffer stroke is extended, the sliding groove guides the moving frames, the offset rate of the moving frames is reduced, ensuring that the spring assembly is subjected to uniform force and improving the vertical impact absorption efficiency.

[0022] Preferably, a second rack is fixedly installed inside the rear side of the second movable frame, and a second gear is rotatably connected inside the force-increasing spring assembly, and the second rack meshes with the second gear. A third rack is provided at the bottom front side of the first movable frame, and the third rack meshes with the second gear.

[0023] By adopting the above technical solution, the second spur rack, the third spur rack, and the second gear mesh and drive each other, the uniformity of the second spring compression force is improved, the gear rack amplifies the buffering force, and the buffering efficiency of the spring assembly is improved, which can cope with collisions of different intensities.

[0024] Preferably, a first guide rod is fixedly connected to the front side of the first movable frame, and a second guide rod is fixedly connected to the rear side of the second movable frame, and a second spring is fixedly connected between the first guide rod and the second guide rod.

[0025] Using the above technical solution, the first guide rod and the second guide rod guide the compression of the second spring, reducing the spring's torsion rate. The guide rod and the spring work together to reduce the rebound amplitude, avoid secondary collision damage, and extend the spring's service life.

[0026] A method of using a car safety seat cushioning device, the method of using the car safety seat cushioning device includes the following steps:

[0027] Step 1: After the car start-up protection device is automatically powered on, the multi-source sensors on the back of the seat cushion start to work. The pressure monitoring unit collects the weight data of the driver and passengers, the posture monitoring unit captures the sitting posture, and the distance monitoring unit monitors the distance of vehicles behind in real time through the rear image acquisition camera.

[0028] Step 2: During vehicle operation, multi-source sensors continuously collect data and transmit it to the controller. When the distance monitoring unit detects that the distance to the vehicle behind is ≤1.5m and the relative speed is ≥20km / h, or the pressure monitoring unit detects a sudden shift in sitting posture, the controller determines it to be a high-risk condition and immediately triggers a buffer command.

[0029] Step 3: In the event of a rear-end collision or frontal collision, the controller starts the servo motor, drives the threaded rod to rotate, and moves the slider backward along the slide rail. The slider pulls the first moving frame on the rear side of the force-amplifying spring assembly through the first hinge, so that the first moving frame and the second moving frame are relatively close. The second rack and the third rack are driven by the meshing of the second gear to compress the second spring in the middle. At the same time, the top plate forms a flexible support with the bottom plate through the connecting plate to absorb the vertical impact energy and avoid injury to the buttocks and legs of the driver and passengers.

[0030] Step four: When a side collision occurs, the compression rod is triggered to squeeze, pushing the telescopic rod to extend outward along the sleeve, compressing the first spring on the outside. The telescopic rod drives the first spur rack to move, meshing with the first gear to drive the protective plate to flip outward and open. After the protective plate opens, the safety airbag is triggered to pop out from the airbag outlet to form a side wrap protection and alleviate the side compression impact force.

[0031] Using the above technical solution, multi-source sensors automatically collect data on weight, posture, and distance from the vehicle. The controller determines high-risk conditions in real time, with no human intervention throughout the process. The overall response speed is fast, avoiding human delays and reducing the risk of injury. It is adaptable to different collision requirements. In the event of a rear-end or frontal collision, the servo motor drives the booster spring assembly to absorb energy, and the connecting plate provides flexible support, improving vertical impact absorption. In the event of a side collision, the transmission opens the protective plate and triggers the airbag, reducing the damage rate of critical parts.

[0032] Compared with the prior art, the beneficial effects of the present invention are: the car safety driving seat cushioning device and its method of use,

[0033] 1. Side airbag protection with a dual protection structure, significantly reducing side collision damage: Through the dual protection design of "mechanical triggering of the protective plate + airbag deployment from the airbag outlet", in the event of a side collision, the compression rod pushes the telescopic rod, which drives the first straight rack to mesh with the first gear, driving the protective plate to flip open and triggering the airbag deployment, forming a side wrap-around protection. This structure reduces the lateral displacement of the waist of the occupants and the lateral tilt of the head. At the same time, the first spring attenuates the initial impact force, reducing the rate of human body compression injury during a collision, and is suitable for various side collision scenarios.

[0034] 2. Automatic seat cushion adjustment for front and rear impacts, precise energy absorption, and protection of key areas such as the buttocks and legs: When a car is impacted from the front or rear, multi-source sensors provide real-time risk feedback, and the controller automatically starts the servo motor to drive the slider to adjust the force-amplifying spring assembly. Through the first and second moving frames and gear rack transmission, the second spring is compressed, and with the flexible support of the connecting plate, the seat cushion's cushioning force is automatically adjusted in real time to adapt to different impact intensities. This structure improves the vertical impact absorption efficiency, can absorb most of the impact force, and prevents the buttocks and legs from being injured due to excessive impact. It is suitable for drivers and passengers of different weights and body types, improving the consistency of protection. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the external structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the overall rear structure of the present invention;

[0037] Figure 3 This is a schematic diagram of a partial cross-section of the front side of the present invention;

[0038] Figure 4 This is a schematic diagram of the protective plate driving structure of the present invention;

[0039] Figure 5 This is a schematic diagram of the cross-sectional structure of the sleeve of the present invention;

[0040] Figure 6 This is a schematic diagram of the cross-sectional structure of the seat cushion of the present invention;

[0041] Figure 7 This is a schematic diagram of the base plate structure of the present invention;

[0042] Figure 8 This is a schematic diagram of the external structure of the force-enhancing spring assembly of the present invention;

[0043] Figure 9 This is a cross-sectional structural diagram of the force-enhancing spring assembly of the present invention;

[0044] Figure 10 This is a partial structural diagram of the first and second movable frames of the present invention.

[0045] In the diagram: 1. Seat cushion; 2. Backrest; 3. Headrest; 4. Adjustment bracket; 5. Seatbelt buckle; 6. Protective plate; 7. First cavity; 8. Second cavity; 9. Airbag outlet; 10. Compression rod; 11. Sleeve; 12. Telescopic rod; 13. First spring; 14. First spur rack; 15. First gear; 16. Support rod; 17. Base plate; 18. Top plate; 19. Connecting plate; 20. Multi-source sensor; 21. Servo motor; 22. Threaded rod; 23. Slider; 24. Slide rail; 25. Force-amplifying spring assembly; 26. First hinge; 27. Second hinge; 28. First moving frame; 29. ​​Slot; 30. Second moving frame; 31. Second spur rack; 32. Second gear; 33. Third spur rack; 34. First guide rod; 35. Second guide rod; 36. Second spring. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please see Figures 1-10 The present invention provides a technical solution:

[0048] A car seat cushioning device for safe driving includes a seat cushion 1 and a backrest 2. An adjustment bracket 4 is connected and installed between the seat cushion 1 and the backrest 2. A seat belt buckle 5 is provided on the side of the adjustment bracket 4. A headrest 3 is fixedly installed on the top of the backrest 2. Protective plates 6 are provided on the front sides of the left and right sides of the backrest 2. An airbag outlet 9 is provided on the rear side of the protective plates 6. A compression rod 10 is provided inside the backrest 2. A telescopic rod 12 is connected to the outer end of the compression rod 10. A first straight rack 14 is fixedly connected to the outer end of the telescopic rod 12. 4. The outer side is meshed with a first gear 15, and the first gear 15 is fixedly connected to the rear side of the protective plate 6. A multi-source sensor 20 is provided on the rear side of the seat cushion 1. The seat cushion 1 is provided with a bottom plate 17 and a top plate 18. The left and right sides of the bottom plate 17 and the top plate 18 are hinged with connecting plates 19. A slider 23 is slidably connected to the upper surface of the bottom plate 17. The slider 23 is driven by a servo motor 21 to form a forward and backward movement structure. A force-increasing spring assembly 25 is hinged above the slider 23. The front side of the force-increasing spring assembly 25 is hinged to the bottom surface of the top plate 18.

[0049] The backrest 2 has first cavities 7 on both the left and right sides, and each first cavity 7 has an airbag outlet 9. When the protective plate 6 is opened, the airbag is triggered and deployed from the airbag outlet 9 to form a protective structure on the left and right sides of the seat. The backrest 2 has a second cavity 8 in the middle, and a compression rod 10 is fixedly installed inside the second cavity 8. The telescopic rod 12 is slidably connected to the inside of the sleeve 11, and the sleeve 11 is fixedly installed inside the second cavity 8. A first spring 13 is connected between the end of the sleeve 11 near the middle of the backrest 2 and the outer end of the compression rod 10. A first straight rack 14 passes through the second cavity 8 and the first cavity 7. First gears 15 are fixedly installed on the upper and lower sides of the rear side of the protective plate 6, and the first gears 15 are fixedly connected. The first cavity 7 of the backrest 2, connected to the support rod 16, accommodates the airbag, reducing the deviation of the airbag deployment path and improving the deployment response speed. The opening of the protective plate 6 triggers the airbag deployment, reducing the rate of human body compression injury during side collisions and decreasing the head tilt amplitude. The second cavity 8 fixes the compression rod 10 and the sleeve 11, and the sleeve 11 guides the telescopic rod 12 to slide, reducing the offset rate of the telescopic rod 12 and ensuring precise meshing between the first straight rack 14 and the first gear 15, thus reducing the deviation of the opening angle of the protective plate 6. The first spring 13 between the sleeve 11 and the compression rod 10 attenuates the initial impact force of the side collision. The double first gear 15 and the support rod 16 on the rear side of the protective plate 6 improve the opening stability of the protective plate 6 and ensure the continuity of protection.

[0050] The multi-source sensor 20 includes a pressure monitoring unit, an attitude monitoring unit, and a distance monitoring unit. The image acquisition camera connected to the distance monitoring unit is installed at the rear of the vehicle. The signal of the multi-source sensor 20 is connected to the controller, and the controller controls the start and stop of the servo motor 21. The output end of the servo motor 21 is connected to a threaded rod 22, and a slider 23 is threadedly connected to the outside of the threaded rod 22. The bottom of the slider 23 is slidably connected to the top of the slide rail 24, and the slide rail 24 is fixedly installed in the middle of the upper surface of the base plate 17. The three monitoring units of the multi-source sensor 20 improve the accuracy of risk prediction. The sensor and the controller are linked with the servo motor 21 to realize the automatic triggering of buffering, avoid the delay of human operation during collision, and adapt to drivers and passengers of different body sizes. The servo motor 21 drives the threaded rod 22 to rotate and move the slider 23, improving the movement accuracy of the slider 23. The slide rail 24 guides the slider 23 to slide, reducing the movement resistance of the slider 23 and improving the response speed, ensuring that the force-boosting spring assembly 25 triggers the buffer in time.

[0051] The force-amplifying spring assembly 25 has a first movable frame 28 located on its rear side, and a first hinge 26 located on the rear side of the first movable frame 28, which is connected to the top of the slider 23. A second hinge 27 is located on the front side of the force-amplifying spring assembly 25, and is connected to the bottom surface of the top plate 18. A second movable frame 30 is located on the front side of the force-amplifying spring assembly 25, and the upper and lower sides of both the first movable frame 28 and the second movable frame 30 are slidably connected to grooves inside the outer shell of the force-amplifying spring assembly 25. A slot 29 is provided above the first movable frame 28, and the rear side of the top surface of the second movable frame 30 is slidably connected to the slot 29. A second rack 31 is fixedly installed inside the rear side of the second movable frame 30, and a second gear 32 is rotatably connected inside the force-amplifying spring assembly 25, with the second rack 31 meshing with the second gear 32. A third rack 33 is located at the bottom front side of the first movable frame 28. The first guide rod 34 is fixedly connected to the front side of the first movable frame 28, and the second guide rod 35 is fixedly connected to the rear side of the second movable frame 30. A second spring 36 is fixedly connected between the first guide rod 34 and the second guide rod 35. The first movable frame 28 and the second movable frame 30 slide in the force-increasing spring assembly 25, extending the buffer stroke. The slide guides the movable frame, reducing the offset rate of the movable frame, ensuring uniform force on the spring assembly, and improving the vertical impact absorption efficiency. The second spur rack 31, the third spur rack 33, and the second gear 32 mesh and drive, improving the uniformity of the compression force of the second spring 36. The gear and rack amplify the buffer force, improving the buffer efficiency of the spring assembly, and enabling it to cope with collisions of different intensities. The first guide rod 34 and the second guide rod 35 guide the compression of the second spring 36, reducing the spring torsion rate. The guide rod and the spring cooperate to reduce the buffer rebound amplitude, avoiding secondary collision damage and extending the service life of the spring.

[0052] A method of using a car safety seat cushioning device, comprising the following steps:

[0053] Step 1: After the car start-up protection device is automatically powered on, the multi-source sensor 20 on the back of the seat cushion 1 starts to work. The pressure monitoring unit collects the weight data of the driver and passengers, the posture monitoring unit captures the sitting posture, and the distance monitoring unit monitors the distance of the vehicle behind in real time through the rear image acquisition camera.

[0054] Step 2: During vehicle operation, the multi-source sensor 20 continuously collects data and transmits it to the controller. When the distance monitoring unit detects that the distance to the vehicle behind is ≤1.5m and the relative speed is ≥20km / h, or the pressure monitoring unit detects a sudden shift in sitting posture, the controller determines it to be a high-risk condition and immediately triggers a buffer command.

[0055] Step 3: In the event of a rear-end collision or frontal collision, the controller starts the servo motor 21, drives the threaded rod 22 to rotate, and moves the slider 23 backward along the slide rail 24. The slider 23 pulls the first moving frame 28 behind the force-amplifying spring assembly 25 through the first hinge 26, so that the first moving frame 28 and the second moving frame 30 are relatively close. The second rack 31 and the third rack 33 are driven by the meshing of the second gear 32, compressing the second spring 36 in the middle. At the same time, the top plate 18 forms a flexible support with the bottom plate 17 through the connecting plate 19, absorbing the vertical impact energy and avoiding injury to the buttocks and legs of the driver and passengers.

[0056] Step four: When a side collision occurs, the compression rod 10 is triggered to squeeze, pushing the telescopic rod 12 to extend outward along the sleeve 11, compressing the first spring 13 on the outside. The telescopic rod 12 drives the first straight rack 14 to move, meshing with the first gear 15 to drive the protective plate 6 to flip outward and open. After the protective plate 6 opens, the safety airbag is triggered to pop out from the airbag outlet 9 to form a side wrap protection and alleviate the side compression impact force.

[0057] Multi-source sensors 20 automatically collect data on weight, posture, and distance from the vehicle. The controller determines high-risk conditions in real time. The entire process requires no human intervention, has a fast overall response speed, avoids human delays, reduces the risk of injury, and adapts to different collision requirements. In the event of a rear-end or frontal collision, the servo motor 21 drives the force-amplifying spring assembly 25 to absorb energy, and the connecting plate 19 provides flexible support, improving vertical impact absorption. In the event of a side collision, the transmission opens the protective plate 6 and triggers the airbag, reducing the damage rate of critical parts.

[0058] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0059] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A car seat cushioning device for safe driving, comprising a seat cushion (1) and a backrest (2), wherein an adjustment bracket (4) is connected and installed between the seat cushion (1) and the backrest (2), and a seat belt buckle (5) is provided on the side of the adjustment bracket (4), and a headrest (3) is fixedly installed above the backrest (2), characterized in that: The backrest (2) has protective plates (6) on the front sides of both sides, and airbag outlets (9) on the rear side of the protective plates (6). The backrest (2) has a compression rod (10) inside, and a telescopic rod (12) is connected to the outer end of the compression rod (10). A first straight rack (14) is fixedly connected to the outer end of the telescopic rod (12), and a first gear (15) is meshed with the outer side of the first straight rack (14). The first gear (15) is fixedly connected to the rear side of the protective plate (6). The seat cushion (1) A multi-source sensor (20) is provided on the rear side, and a base plate (17) and a top plate (18) are provided inside the seat cushion (1). Connecting plates (19) are hinged to the left and right sides of the base plate (17) and the top plate (18). A slider (23) is slidably connected to the upper surface of the base plate (17), and the slider (23) is driven by a servo motor (21) to form a forward and backward movement structure. A force-increasing spring assembly (25) is hinged above the slider (23), and the front side of the force-increasing spring assembly (25) is hinged to the bottom surface of the top plate (18).

2. The car seat cushioning device according to claim 1, characterized in that: The backrest (2) has a first cavity (7) on both the left and right sides, and an airbag outlet (9) is provided inside the first cavity (7). When the protective plate (6) is opened, the safety airbag is triggered to pop out from the airbag outlet (9) to form a protective structure on the left and right sides of the seat.

3. The car seat cushioning device according to claim 2, characterized in that: The backrest (2) has a second cavity (8) in the middle, and the compression rod (10) is fixedly installed inside the second cavity (8). The telescopic rod (12) is slidably connected inside the sleeve (11), and the sleeve (11) is fixedly installed inside the second cavity (8).

4. The car seat cushioning device according to claim 3, characterized in that: The sleeve (11) is connected to the outer end of the compression rod (10) by a first spring (13) at one end near the middle of the backrest (2), and the first straight rack (14) passes through the second cavity (8) and the first cavity (7). The protective plate (6) is fixedly installed with first gears (15) on both the upper and lower sides, and a support rod (16) is fixedly connected between the first gears (15).

5. The car seat cushioning device according to claim 1, characterized in that: The multi-source sensor (20) includes a pressure monitoring unit, an attitude monitoring unit and a distance monitoring unit, and the image acquisition camera connected to the distance monitoring unit is installed at the rear of the car. The signal of the multi-source sensor (20) is connected to the controller, and the controller controls the start and stop of the servo motor (21).

6. The car seat cushioning device according to claim 5, characterized in that: The output end of the servo motor (21) is connected to a threaded rod (22), and a slider (23) is threadedly connected to the outside of the threaded rod (22). The bottom of the slider (23) is slidably connected to the top of the slide rail (24), and the slide rail (24) is fixedly installed in the middle of the upper surface of the base plate (17).

7. The car seat cushioning device according to claim 1, characterized in that: The force-enhancing spring assembly (25) has a first movable frame (28) on its rear side, and a first hinge (26) on its rear side. The first hinge (26) is connected to the top of the slider (23). The force-enhancing spring assembly (25) has a second hinge (27) on its front side, and the second hinge (27) is connected to the bottom surface of the top plate (18). The force-enhancing spring assembly (25) has a second movable frame (30) on its front side. The upper and lower sides of the first movable frame (28) and the second movable frame (30) are slidably connected to the sliding groove inside the shell of the force-enhancing spring assembly (25). A slot (29) is opened above the first movable frame (28), and the rear side of the top surface of the second movable frame (30) is slidably connected to the inside of the slot (29).

8. A car seat cushioning device for safe driving according to claim 7, characterized in that: The second movable frame (30) has a second rack (31) fixedly installed inside the rear side, and the force-increasing spring assembly (25) has a second gear (32) rotatably connected inside, and the second rack (31) meshes with the second gear (32). The first movable frame (28) has a third rack (33) at the bottom front side, and the third rack (33) meshes with the second gear (32).

9. A car seat cushioning device for safe driving according to claim 8, characterized in that: The first movable frame (28) is fixedly connected to the front side of the first guide rod (34), and the second movable frame (30) is fixedly connected to the rear side of the second guide rod (35), and a second spring (36) is fixedly connected between the first guide rod (34) and the second guide rod (35).

10. A method of using a car seat cushioning device for safe driving, characterized in that: The method of using the automotive safety driver's seat cushioning device includes the following steps: Step 1: After the car start-up protection device is automatically powered on, the multi-source sensor (20) on the back of the seat cushion (1) starts to work. The pressure monitoring unit collects the weight data of the driver and passengers, the posture monitoring unit captures the sitting posture, and the distance monitoring unit monitors the distance of the vehicle behind in real time through the rear image acquisition camera. Step 2: During vehicle operation, the multi-source sensor (20) continuously collects data and transmits it to the controller. When the distance monitoring unit detects that the distance to the vehicle behind is ≤1.5m and the relative speed is ≥20km / h, or the pressure monitoring unit detects a sudden shift in sitting posture, the controller determines it to be a high-risk condition and immediately triggers a buffer command. Step 3: In the event of a rear-end collision or frontal collision, the controller starts the servo motor (21), drives the threaded rod (22) to rotate, and drives the slider (23) to move backward along the slide rail (24). The slider (23) pulls the first moving frame (28) on the rear side of the force-increasing spring assembly (25) through the first hinge (26), so that the first moving frame (28) and the second moving frame (30) are relatively close. The second rack (31) and the third rack (33) are meshed and driven through the second gear (32), compressing the second spring (36) in the middle. At the same time, the top plate (18) forms a flexible support with the bottom plate (17) through the connecting plate (19), absorbing the vertical impact energy and avoiding injury to the buttocks and legs of the driver and passengers. Step 4: When a side collision occurs, the compression rod (10) is triggered to squeeze and push the telescopic rod (12) to extend outward along the sleeve (11), compressing the first spring (13) on the outside. The telescopic rod (12) drives the first straight rack (14) to move and mesh with the first gear (15) to drive the protective plate (6) to flip and open outward. After the protective plate (6) opens, the safety airbag is triggered to pop out from the airbag outlet (9) to form a side wrap protection and relieve the side compression impact force.

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