Seat safety protection method, seat safety protection system and automobile

Abstract

The present invention discloses a seat safety protection method, a seat safety protection system and a car. The seat safety protection method comprises the following steps: S1, determining whether the seat back rotation function needs to be triggered according to the degree of collision of the vehicle and the sitting state of the seat, and if so, the seat back rotation function is triggered; S2, the seat back overcomes the damping force and rotates in the direction of vehicle travel. When the vehicle has an unavoidable frontal collision, the seat back rotation function is triggered according to the degree of collision of the vehicle and the sitting state of the seat. Under the inertia of the seat back itself and the occupants, the seat back rotates forward as the collision process progresses, that is, it rotates in the direction of vehicle travel. During the rotation process, the damping force exerts a certain restraining force on the occupants and absorbs the kinetic energy of the occupants, thereby reducing the damage to the occupants.

Description

Technical Field

[0001] The invention relates to the field of automobile seats, and in particular to a seat safety protection method, a seat safety protection system and an automobile. Background Art

[0002] At present, most of the seat belts in the automotive field, except for vehicles for special purposes, adopt three-point seat belts, among which at least two anchor points or fixed points are fixed on the body structure, and the other point is a buckle, which can be fixed on the seat. Of course, there are also designs that fix all three points of the car seat belt on the body. The fixed point on the body serves as the anchor point of the seat belt, which needs to be strong enough and cannot be loosened to provide the restraint force of the seat belt to the driver and passengers during a collision. However, excessive restraint will cause damage to the chest of the driver and passengers, so there are force-limited seat belts. During the driving process of the vehicle, if the backrest is laid down and the occupant is half-lying or completely lying down to rest, if a head-on collision occurs at this time, the traditional seat belts and airbags fixed to the body structure will not provide effective protection for the occupants.

[0003] With the development of intelligent automobiles, automatic driving or unmanned driving technology, the driver's attention to the driving process will be partially or completely liberated, and the driver in the car, especially the passenger on the front passenger side, will have more possible sitting postures. Three sitting postures can be summarized: 1) normal driving posture, 2) working posture, and 3) leisure posture. The specific normal driving posture means that the driver and passengers pay full attention to the driving conditions of the vehicle. Generally, the seat back is adjusted to the design position of the seat, such as about 25 degrees; in the working posture, the driver and passengers will not pay attention to the driving conditions of the vehicle, and can work or entertain in the vehicle, and the seat back is adjusted to about 45 degrees; and for the leisure sitting posture, the driver and passengers will not pay attention to the driving of the vehicle at all, and can close their eyes to rest, and the seat back is adjusted to 60 degrees, or even a larger angle.

[0004] In the prior art, after the backrest of the car seat, especially the front seat, is adjusted, the backrest angle is locked and fixed by the seat recliner, and the backrest cannot be rotated in the event of a collision. When an inevitable frontal or side collision occurs, it is difficult for the prior art or traditional automobile safety restraint system to protect the driver and passengers in a working or leisure sitting position, and it may even cause more serious injuries. This is because the existing collision safety technical solutions only protect the driver and passengers from collision safety injuries in the driving position or according to the design position of the seat. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defect that the safety protection system of the automobile seat in the prior art is difficult to protect the driver and passengers in the working or leisure sitting position, and may even cause more serious injuries, and to provide a seat safety protection method, a seat safety protection system and a car.

[0006] The present invention solves the above technical problems through the following technical solutions:

[0007] A seat safety protection method is characterized in that the seat safety protection method comprises the following steps:

[0008] S1. determining whether the seat back rotation function needs to be triggered according to the degree of the vehicle collision and the seat sitting state, and if so, the seat back rotation function is triggered;

[0009] S2. The seat back overcomes the damping force and rotates in the direction of vehicle travel.

[0010] In this solution, when the vehicle is inevitably involved in a collision, the seat back rotation function is triggered according to the degree of the vehicle collision and the seat sitting state. During the rotation process, the damping force exerts a certain restraining force on the occupant to absorb the kinetic energy of the occupant, thereby reducing the damage to the occupant.

[0011] Preferably, step S1 includes the following steps:

[0012] S11, judging whether the conditions for the airbag control unit to detonate are met according to the degree of vehicle collision, and if so, executing step S12;

[0013] S12, determining whether the seat is in a semi-reclining or lying state, if so, executing step S13;

[0014] S13, triggering the seat back rotation function.

[0015] In this solution, when the collision of the vehicle is serious enough to require the detonation of the airbag control unit, if the seat back is in a semi-reclining or flat position, the occupants will dive down seriously, and the head, neck and chest of the occupants are far away from the front airbag. Even if the airbag is deployed, it cannot drop down to effectively protect the occupants. Therefore, when the passenger is in a semi-reclining or flat position, the rotation function of the seat back is triggered, so that in the event of a collision, the seat back rotates in the direction of the vehicle's travel as the collision progresses, so as to reduce the impact force on the occupants during the collision, thereby reducing the damage to the occupants.

[0016] Preferably, after step S12, the following steps are further included:

[0017] The seat belt pretensioner and headband airbag are triggered according to the detonation strategy.

[0018] In this solution, when the seat is in a semi-reclining or flat position and the vehicle is in a violent frontal collision, the seatback rotates forward and the seat belt pre-tightening and headgear airbag are triggered through a detonation strategy. The seat belt pre-tightening exerts a restraining force on the driver and passengers to reduce the risk of secondary collision; on the other hand, the headgear airbag protects the head, neck and chest of the human body to further reduce the harm to the driver and passengers.

[0019] Preferably, after step S12, the following steps are further included:

[0020] The front airbag is triggered according to the detonation strategy.

[0021] In this solution, when the seat is in a semi-reclining or lying position and the vehicle is involved in a violent collision, the front airbag can be triggered while the seat back is rotating forward. When the seat back is rotated forward to the point where it cannot rotate further, even if the driver and passengers move forward under inertia, the front airbag can still effectively protect them, thereby improving safety performance.

[0022] Preferably, in step S2, a switching device is provided in the seat back, and when the rotation function of the seat back is triggered, the switching device is unlocked, and the switching device can push the seat back to rotate forward. The seat back is actively pushed forward by the switching device to improve the reliability of the seat back rotation in the event of a frontal collision.

[0023] Preferably, the power for the seat back to rotate comes from the inertia of the seat back and the human body during the collision, and / or the tension of the seat belt. Under the inertia of the seat back and the occupant, and the tension of the seat belt, the seat back rotates forward during the collision, that is, in the direction of the vehicle. No additional power device for rotating the seat back is added, the structure is simple, and the reliability of the seat back rotation can be ensured.

[0024] Preferably, after step S2, there are further steps:

[0025] S3, judging whether the seat back has been rotated to the limit position according to the rotation angle of the seat back, if so, proceeding to step S4;

[0026] S4: the seat back stops rotating.

[0027] A safety protection system for a seat, characterized in that the safety protection system comprises:

[0028] Seat backs;

[0029] a seat basin, the seat back being rotatable relative to the seat basin;

[0030] A seat belt, wherein at least one fixing point of the seat belt is connected to the upper end of the seat back;

[0031] A switching device, the switching device is rotatably connected to the seat back, the switching device is fixed to the seat basin; the switching device has a locked state and an unlocked state;

[0032] When the vehicle does not collide or the degree of the collision does not need to trigger the rotation function of the seat back, the switching device is in a locked state;

[0033] When the degree of collision occurring in the vehicle requires triggering the rotation function of the seat back, the switching device is switched to an unlocked state, and the seat back can rotate relative to the seat basin in the direction of vehicle travel.

[0034] In this solution, by connecting a fixed point of the seat belt to the upper end of the seat back, when a collision occurs, the seat belt can exert a pulling force on the seat back under the action of the inertia of the driver and passenger, providing a tangential force for the rotation of the seat back. By installing a switching device between the seat back and the seat pan, when the rotation function of the seat back needs to be triggered, the seat back can rotate in the direction of the vehicle. On the one hand, the rotation of the seat back absorbs the kinetic energy of the driver and passenger to reduce the damage to the driver and passenger, and can also reduce the damage caused by the secondary collision between the driver and passenger and the seat back; on the other hand, the seat back can be rotated to a position that is conducive to the effective protection of the driver and passenger by the seat belt and the front airbag, so as to further reduce the damage to the driver and passenger.

[0035] Preferably, when the switching device is switched to an unlocked state, the seat back and the switching device are relatively fixed, and the seat back and the switching device rotate relative to the seat basin at the same time.

[0036] Preferably, the switching device includes a first connection part and a second connection part, the first connection part is rotatably connected to the seat pot, the second connection part is located at an end of the switching device away from the first connection part, and the second connection part is connected to the seat pot to limit the switching device from rotating around the first connection part relative to the seat pot. The first connection part is rotatably connected to the seat pot, so that the seat back and the switching device can rotate relative to the seat pot around the first connection part after being fixed. The switching device is limited from rotating around the first connection part relative to the seat pot by the second connection part, so that in a state where no collision occurs, the switching device and the seat pot are relatively fixed to ensure the riding comfort of the driver and passengers.

[0037] Preferably, the switching device comprises a rotating shaft and a switching body, and the rotating shaft is arranged at the first connecting portion;

[0038] The rotating shaft is fixed to the seat basin, and the switching body is rotatably connected to the rotating shaft;

[0039] Alternatively, the rotating shaft is fixed to the switching body, and the seat basin is rotatably connected to the rotating shaft.

[0040] In this solution, the rotation of the switching body relative to the seat basin is achieved through the above structural form, which has a simple structure and is easy to install.

[0041] Preferably, when the switching device is in an unlocked state, the second connection part is separated from the seat basin. The switching device is unlocked by separating the second connection part from the seat basin, thereby realizing the rotation function of the switching device relative to the seat basin.

[0042] Preferably, the safety protection system includes a control unit, the control unit is electrically connected to the switching device, and the control unit controls the second connection part to separate from the seat pot. The control unit controls the separation of the second connection part from the seat pot, so that the unlocking of the switching device is more intelligent, thereby ensuring the reliability of the seat back rotation function, thereby improving the reliability of the seat safety protection system.

[0043] Preferably, the second connection part is further connected with a pushing assembly, which applies an oblique upward thrust to the second connection part to push the switching device to rotate forward. When the second connection part is separated from the seat pan, the switching device and the seat back rotate forward under the thrust of the pushing assembly.

[0044] Preferably, an anti-reversal component is provided on the first connection portion, and the anti-reversal component limits the switching device and the seat back from rotating in a direction away from the vehicle. The anti-reversal component is used to limit the switching device to prevent it from reversing backwards under the reaction force of a collision, so as to further improve the safety performance of the safety protection system.

[0045] Preferably, the safety protection system of the seat also includes an energy absorbing device for preventing the switching device from rotating relative to the seat pot, and the energy absorbing device is connected to the switching device and the seat pot at the same time. The energy absorbing device prevents the switching device from rotating relative to the seat pot, so that when a collision occurs, the inertia of the driver and the seat back and the tension of the seat belt must overcome the damping force of the energy absorbing device on the switching device before it can rotate forward. The damping force generated by the energy absorbing device on the switching device can provide a restraining force for the driver and the passenger, and absorbs the forward kinetic energy of the driver and the passenger during the follow-up movement of the seat back, thereby reducing the damage caused to the driver and the passenger by the collision.

[0046] Preferably, the safety protection system comprises a recliner, through which the seat back and the switching device are rotatably connected. The recliner is used for the driver and passenger to adjust the angle of the seat back when the vehicle is in a normal state (ie, when no collision occurs).

[0047] Preferably, when the switching device is in an unlocked state, the recliner is in a locked state. When a collision occurs and triggers the unlocked state of the switching device, the rotation of the seat back relative to the seat pot means that the switching device and the seat back rotate relative to the seat pot at the same time, and the recliner is in a locked state at this time, that is, at this time, the seat back and the switching device are locked by the recliner, and the two are relatively fixed.

[0048] Preferably, the safety protection system of the seat further includes a headgear airbag, which is arranged inside the seat back and is used to cover the head, neck and chest of the driver and passenger. The headgear airbag is deployed as the seat back rotates after a frontal collision. Since the seat back rotates forward as the driver and passenger move during a frontal collision, the headgear airbag installed on the seat back always covers the head, neck and chest of the driver and passenger after deployment. When the seat back rotates to a specific angle, the seat back will rotate to the limit position and cannot continue to rotate. If the occupant is not completely restrained at this time, that is, the driver and passenger still have a relative movement tendency with the vehicle, the restraint of the driver and passenger and further reduction of the injury to the occupant are mainly responsible for the seat belt and airbag. At this time, the headgear airbag acts as a buffer device to further absorb the kinetic energy of the driver and passenger to further reduce the injury to the driver and passenger. Even in the event of a side collision, no matter what position the seat is in, the headgear airbag can provide side protection for the driver and passenger after deployment.

[0049] Preferably, the headgear airbag is installed on a side of the seat back close to the central channel.

[0050] Preferably, the seat belt is a pre-tensioned seat belt. The pre-tensioned seat belt can be automatically tightened to apply restraint force to the driver and passenger in the event of a collision, so as to absorb the kinetic energy of the driver and passenger, thereby reducing the damage caused by the collision.

[0051] A car is characterized in that it comprises the safety protection system of the seat as described above.

[0052] In this solution, the above safety protection system is used in the car seat. When a frontal collision occurs, the switching device is unlocked so that the seat back in a semi-reclining or flat state can overcome the damping force and rotate in the direction of vehicle travel under the combined action of the inertia of the driver and the tension of the seat belt. In this process, the damping force can absorb the kinetic energy of the driver and the passenger to reduce the damage to the driver and the passenger. At the same time, the traditional front airbag and headgear airbag can also cushion the driver and the passenger and absorb the kinetic energy of the driver and the passenger, thereby reducing the damage to the driver and the passenger. The use of this safety protection system makes up for the defect that the automobile safety restraint system in the prior art is difficult to protect the driver and the passenger in the working sitting position or the leisure sitting position, and may even cause more serious injuries.

[0053] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0054] The positive and progressive effect of the present invention is that: the safety protection method of the seat of the present invention triggers the seat back rotation function according to the degree of the vehicle collision and the seat sitting state when the vehicle is inevitably involved in a collision. Under the inertia of the seat back and the occupant, the seat back rotates forward during the collision process, that is, in the direction of the vehicle's travel. During the rotation process, the damping force exerts a certain restraining force on the occupant and absorbs the kinetic energy of the occupant, thereby reducing the damage to the occupant.

[0055] The safety protection system of the seat of the present invention installs a switching device between the seat back and the seat pan, so that when the rotation function of the seat back needs to be triggered, the seat back can rotate in the direction of the vehicle. On the one hand, the rotation of the seat back absorbs the kinetic energy of the driver and the passenger to reduce the damage to the driver and the passenger, and can also reduce the damage caused by the secondary collision between the driver and the seat back; on the other hand, the seat back can be rotated to a position that is conducive to the seat belt and the front airbag to effectively protect the driver and the passenger, so as to further reduce the damage to the driver and the passenger. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 The figure is a flow chart of a seat safety protection method according to a preferred embodiment of the present invention.

[0057] Figure 2 The figure is a schematic structural diagram of a seat safety protection system according to a preferred embodiment of the present invention.

[0058] Figure 3 Schematic diagram of the structure of the seat back in different states according to the preferred embodiment of the present invention.

[0059] Figure 4 This is a structural schematic diagram of a preferred embodiment of the present invention in which the seat back is in a lying state.

[0060] Figure 5 The figure is a schematic cross-sectional structure diagram of a seat safety protection system according to a preferred embodiment of the present invention.

[0061] Figure 6 This is a schematic diagram of the structure of the head cover airbag of the seat after it is deployed according to a preferred embodiment of the present invention.

[0062] Figure 7 It is a simple schematic diagram of the seat back following process of the preferred embodiment of the present invention.

[0063] Description of reference numerals:

[0064] Seat back 10

[0065] Seat Basin 20

[0066] Seat belt 30

[0067] Switching device 40

[0068] First connection portion 401

[0069] Second connection portion 402

[0070] Shaft 403

[0071] Switch to main body 404

[0072] Recliner 50

[0073] Headgear airbag 60

[0074] Normal sitting position 70

[0075] Working sitting position 80

[0076] Casual sitting position 90

[0077] F S 100

[0078] F b 101

[0079] M f 102

[0080] F s '103 DETAILED DESCRIPTION

[0081] The present invention will be described more clearly and completely below by way of embodiments in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments.

[0082] Example 1

[0083] Due to the development of automobile intelligence and active safety, the passengers in the car will have more riding scenarios. When the seat back 10 is in the normal sitting position 70, the angle between the seat back and the vertical direction is about 25°. The seat back 10 can be adjusted to a semi-lying position (that is, a working position 80), at which time the angle between the seat back 10 and the vertical direction is about 40°-50°; the seat back 10 can also be adjusted to a flat position (that is, a leisure position 90), at which time the angle between the seat back 10 and the vertical direction is about 60° or more. However, in the event of an unavoidable frontal collision, the existing restraint system (seat belt 30, airbag) will not be able to effectively protect the passengers, because the passengers will dive seriously, and the head, neck and chest of the passengers are far away from the front airbag. Even if the airbag is deployed, it cannot effectively protect the passengers.

[0084] In view of the above defects in the prior art, Figures 2 to 7 As shown, this embodiment provides a safety protection system for a seat, which includes a seat back 10, a seat pot 20, a safety belt 30 and a switching device 40. The seat back 10 can rotate relative to the seat pot 20; at least one fixed point of the safety belt 30 is connected to the upper end of the seat back 10; the switching device 40 is rotatably connected to the seat back 10, and the switching device 40 is fixed to the seat pot 20; the switching device 40 has a locked state and an unlocked state. When the vehicle does not collide or the degree of collision does not need to trigger the rotation function of the seat back 10, the switching device 40 is in a locked state; when the degree of collision of the vehicle needs to trigger the rotation function of the seat back 10, the switching device 40 is switched to an unlocked state, and the seat back 10 can rotate relative to the seat pot 20 in the direction of vehicle travel.

[0085] By connecting a fixed point of the safety belt 30 to the upper end of the seat back 10, when a collision occurs, the safety belt 30 can apply tension to the seat back 10 under the action of the inertia of the driver and passenger, thereby providing a tangential force for the rotation of the seat back 10. By installing a switching device 40 between the seat back 10 and the seat pan 20, when the rotation function of the seat back 10 needs to be triggered, the seat back 10 can rotate in the direction of the vehicle's travel. On the one hand, the rotation of the seat back 10 absorbs the kinetic energy of the driver and passenger to reduce the damage to the driver and passenger, and can also reduce the damage caused by the secondary collision between the driver and passenger and the seat back 10; on the other hand, the seat back 10 can be rotated to a position that is conducive to the effective protection of the driver and passenger by the front airbag and the side airbag, thereby further reducing the damage to the driver and passenger.

[0086] There is no restriction on the structure of the switching device 40, as long as the control system issues an instruction to unlock the switching device 40 so that the seat back 10 can rotate relative to the seat pot 20. The seat back 10 can rotate relative to the switching device 40 and the seat pot 20; or the seat back 10 and the switching device 40 can rotate relative to the seat pot 20 at the same time. In this embodiment, the latter is adopted. Specifically, when the switching device 40 is switched to the unlocked state, the seat back 10 and the switching device 40 are relatively fixed, and the seat back 10 and the switching device 40 rotate relative to the seat pot 20 at the same time.

[0087] It should be noted that, in the present embodiment, when an unavoidable head-on collision occurs, the collision is minor and there is no need to trigger the unlocking state of the switching device, or if the seat back is in the normal sitting position 70, the switching device will not be unlocked; the switching device will only be unlocked if the collision is severe enough to trigger the unlocking state of the switching device and the seat back is in the working position 80 or the leisure position 90.

[0088] Further, the switching device 40 includes a first connection portion 401 and a second connection portion 402 disposed at one end of the switching device 40 facing the seat basin 20, wherein the first connection portion 401 is located at the front end of the switching device 40, and the second connection portion 402 is located at the rear end of the switching device 40, that is, the second connection portion 402 is located at one end of the switching device 40 away from the first connection portion 401. The first connection portion 401 is rotatably connected to the seat basin 20, and the second connection portion 402 is connected to the seat basin 20 to limit the switching device 40 from rotating relative to the seat basin 20 around the first connection portion 401. Of course, the second connection portion 402 and the seat basin 20 are separable. The first connection portion 401 is rotatably connected to the seat basin 20, so that the seat back 10 and the switching device 40 can be rotated relative to the seat basin 20 around the first connection portion 401 after being fixed. The second connection part 402 limits the switching device 40 from rotating around the first connection part 401 relative to the seat basin 20, so that in the absence of a collision, the switching device and the seat basin 20 are relatively fixed to ensure the riding comfort of the driver and passengers.

[0089] Specifically, the switching device 40 includes a rotating shaft 403 and a switching body 404, wherein the rotating shaft 403 is disposed at the first connecting portion 401. The rotating shaft 403 is fixed to the seat basin 20, and the switching body 404 is rotatably connected to the rotating shaft 403; of course, the rotating shaft 403 may also be fixed to the switching body 404, and the seat basin 20 is rotatably connected to the rotating shaft 403. The above structural form is used to realize the rotation of the switching body 404 relative to the seat basin 20, which has a simple structure and is easy to install. When the switching device 40 is in an unlocked state, the second connecting portion 402 is separated from the seat basin 20. The unlocking of the switching device 40 is realized by separating the second connecting portion 402 from the seat basin 20, thereby realizing the rotation function of the switching device 40 relative to the seat basin 20.

[0090] In this embodiment, the safety protection system includes a control unit, which is electrically connected to the switching device 40, and the control unit controls the second connection part 402 to separate from the seat basin 20. The second connection part 402 is controlled to separate from the seat basin 20 by the control unit, so that the unlocking of the switching device 40 is more intelligent, thereby ensuring the reliability of the activation of the rotation function of the seat back 10, thereby improving the reliability of the safety protection system of the seat. A pushing component is also connected to the second connection part 402, and the pushing component applies an oblique upward thrust to the second connection part 402 to push the switching device 40 to rotate forward. When the second connection part 402 is separated from the seat basin, the switching device 40 and the seat back 10 rotate forward under the thrust of the pushing component. In other words, the rotation of the seat back 10 and the switching device 40 relative to the seat basin can also be achieved by the combination of the inertia of the driver and the passenger during the collision, the tension of the seat belt 30 and the thrust of the pushing device. Of course, the pushing device can only push the seat back 10 to rotate 10-15°, after which the energy absorption device begins to work. The seat back 10 may be rotated directly through the interaction between the inertia of the driver and the tension of the safety belt 30 and the energy absorbing device without using the pushing assembly.

[0091] It should be noted that the rotation of the switch body 404 relative to the rotating shaft 403 is unidirectional, that is, the switch body 404 can only rotate forward relative to the rotating shaft 403, and cannot rotate backward. This is because an anti-reversal component is provided on the first connecting portion 401, and the anti-reversal component limits the rotation of the switch device 40 and the seat back 10 in the direction away from the vehicle. The anti-reversal component is used to limit the switch device 40 to prevent it from reversing backward under the reaction force of the collision, thereby avoiding secondary injuries to the driver and passengers, and further improving the safety performance of the safety protection system.

[0092] Furthermore, the safety protection system of the seat also includes an energy absorbing device for preventing the switching device 40 from rotating relative to the seat pot 20, and the energy absorbing device is connected to the switching device 40 and the seat pot 20 at the same time. The energy absorbing device prevents the switching device 40 from rotating relative to the seat pot 20, so that when a collision occurs, the inertia of the driver and the seat back 10 itself and the tension of the safety belt 30 must overcome the damping force of the energy absorbing device on the switching device 40 before it can rotate forward. The damping force is generated by the energy absorbing device inside the switching device 40. The energy absorbing device can generate constant resistance through cutting, material yield deformation, etc. During this rotation process, the rotation of the seat back 10 will absorb the kinetic energy of the occupant and improve the restraint direction of the seat belt 30 on the occupant. During the follow-up process of the seat back 10, the forward kinetic energy of the driver and the occupant is continuously absorbed, thereby reducing the damage caused to the driver and the occupant by the collision.

[0093] In this embodiment, the safety protection system includes a recliner 50, and the seat back 10 and the switching device 40 are rotatably connected via the recliner 50. The recliner 50 is used for the driver and passenger to adjust the angle of the seat back 10 when the vehicle is in a normal state (i.e., when no collision occurs). When the switching device 40 is in an unlocked state, the recliner 50 is in a locked state. When a collision occurs and the unlocked state of the switching device 40 is triggered, the rotation of the seat back 10 relative to the seat basin 20 means that the switching device 40 and the seat back 10 rotate relative to the seat basin 20 at the same time, and the recliner 50 is in a locked state at this time, that is, at this time, the seat back 10 and the switching device 40 are locked by the recliner 50, and the two are relatively fixed.

[0094] Moreover, the safety protection system of the seat also includes a headgear airbag 60, which is arranged inside the seat back 10 and is used to cover the head, neck and chest of the driver and passenger. After a frontal collision occurs, the headgear airbag is deployed as the seat back 10 rotates. Since the seat back 10 rotates forward as the driver and passenger move during a frontal collision, the headgear airbag 60 installed on the seat back 10 always covers the head, neck and chest of the driver and passenger after it is deployed. When the seat back 10 rotates to a specific angle, the seat back 10 will rotate to the extreme position and cannot continue to rotate. If the passenger is not completely restrained at this time, that is, the passenger and passenger still have a relative movement tendency with the vehicle, the restraint of the passenger and passenger and further reduction of the injury to the passenger are mainly responsible for the safety belt 30 and the airbag. At this time, the headgear airbag acts as a buffer device to further absorb the kinetic energy of the passenger and passenger to further reduce the injury to the passenger and passenger. Even in the event of a side collision, when the driver and passenger are in a working or leisure sitting position, the head position is relatively low and is not in the protection area of ​​the traditional side airbag curtain, and cannot be effectively protected. After the head cover airbag is deployed, the driver and passenger can be protected from the side. The head cover airbag 60 is installed on the side of the seat back 10 close to the central channel.

[0095] In this embodiment, the seat belt 30 is a pre-tensioned seat belt 30. The pre-tensioned seat belt is adopted so that when a collision occurs, the seat belt 30 can be automatically tightened to apply a restraining force to the driver and passenger to absorb the kinetic energy of the driver and passenger, thereby reducing the damage caused by the collision.

[0096] The working principle of the seat safety protection system provided in this embodiment is as follows:

[0097] When or before a head-on collision occurs in the vehicle, if the Airbag Control Unit (ACU) or other electronic safety controller determines that it is a violent collision and the collision safety of the driver and passengers needs to be protected, the restraint system will be triggered to protect the driver and passengers. If the driver and passengers are in a normal driving position at this time, the traditional restraint system will function normally. If the driver and passengers are in a working position or a leisure position, that is, when the inclination angle of the seat back 10 is greater than 40°, the ACU or other electronic safety controller will trigger the seat rotation switching device 40 in addition to triggering the traditional restraint system according to the detonation strategy, that is, switch the switching device 40 to the unlocked state. At this time, the second connecting portion 402 in the switching device 40 is separated from the seat basin 20, and the seat back 10 and the switching device can rotate forward (driving direction) together, but the rotation at this time is not free. This is because an energy absorption device is also provided in the switching device, which applies a reverse rotation damping force torque M to the switching device. f 102.

[0098] Specifically, after a frontal collision of the vehicle, the driver and the passenger will continue to move forward relative to the vehicle passenger compartment due to inertia, pulling the shoulder strap of the safety belt 30 worn by the driver and the passenger. Figure 4 It is understood that the fixing point on the safety belt 30 is at the position shown in the figure. Figure 2 Since the safety belt 30 is fixed to the seat, regardless of whether the safety belt 30 is pre-tightened, the shoulder strap of the safety belt 30 pulls the seat back 10 through the fixed point when it is restrained. The force of this part is F s 100, the direction of the force is Figure 4 As shown in , the seat back itself has mass, and the inertia force is F b 101, the direction of the force is Figure 4 As the collision progresses, F s and F b Will continue to increase when F s 100 and F b The forward rotation torque generated by 101 is greater than the damping torque M generated by the energy absorption device. f At 102, the seat back 10 will automatically rotate forward with the occupant, thereby achieving follow-up movement.

[0099] The specific rotation of the switching device 40 and the seat back 10 is as follows: the rotation axis of the recliner 50 is the rotation axis of the seat back 10 when it is in normal use, and the rotation axis 403 on the first connection part 401 and the second connection part 402 fix the switching device 40 to the frame of the seat pot. When the above-mentioned collision occurs, and the driver and passenger are in a working or leisure sitting position, the part of the second connection part 402 that is connected to the seat pot 20 will be disengaged from the seat pot frame. At this time, the recliner 50 is in a locked state, that is, the seat back 10 cannot rotate around the rotation axis of the recliner 50. When the second connection part 402 is disengaged, the seat back 10 together with the switching device 40 will be able to rotate around the rotation axis 403 at the first connection part 401. The rotation direction is as follows: Figure 5 In the process of rotating around the rotating shaft 403 at the first connecting portion 401, the reverse damping force generated by the energy absorbing device absorbs the kinetic energy of the driver and the passenger.

[0100] The seat back 10 is rotated under the action of its own inertia and the tension of the shoulder strap of the safety belt 30. Since there is an energy absorption device inside the switching device 40, the seat back needs to overcome the damping force moment M when rotating. f 102 is equivalent to providing a set restraining force to the driver and the passenger, so during the follow-up movement of the seat back 10, the forward kinetic energy of the driver and the passenger is constantly absorbed.

[0101] When the seat back 10 rotates to a certain angle α, that is, the seat back 10 will rotate to the limit position and cannot rotate further. However, at this time, the driver and the passenger are not completely restrained, and the driver and the passenger still have a tendency to move relative to the vehicle. After that, the restraint of the passenger and further reduction of the injury to the passenger are mainly responsible for the safety belt 30 and the airbag. Among them, the head cover airbag 60 is installed on the side of the seat and close to the side of the central channel. It is deployed during the rotation of the seat back 10 and covers the head, neck and chest area of ​​the driver and the passenger. Figure 7 For ease of understanding, the following describes the scheme by taking the passenger seat as an example. The headgear airbag 60 is an asymmetric structure. The upper airbag is deployed from both sides of the occupant's head. The airbag near the central channel is connected to the upper airbag. The lower part covers the occupant's shoulder and forms an airbag cavity on the occupant's chest. Figure 7 In addition, combined with Figure 4 , Figure 7 , when the seat back 10 is Figure 4 Position rotated to Figure 7 When the limit position of Figure 4 Middle seat belt 30 upper fixed point position, turn to Figure 7 The seat belt shoulder strap force F s '103 is basically consistent with the collision direction, which will be more conducive to restraining the driver and passengers. When a frontal collision occurs, since the seat back rotates with the inertia of the occupant, the head cover airbag 60 installed on the seat and the protection area facing the occupant in front are always effective and will not change due to the adjustment of the seat back 10. In addition, the chest airbag cavity of the head cover airbag 60 will make up for the lack of reduced protection effect due to the rearward adjustment of the seat and the backward tilt of the seat back 10 away from the side airbag.

[0102] The present invention, through the above mechanism, solves the problem that the restraint system cannot effectively protect the driver and passengers, especially the front passenger (passenger side) or other non-driving positions, when the seat back 10 is folded back to a large angle, that is, the occupants are in a semi-reclining or fully-reclining sitting position, when the vehicle collides, especially in a head-on collision, through the above mechanism. During the collision, the seat back 10 automatically pulls the seat back 10 to rotate by its own inertia and the occupants' inertia during the collision process. During the rotation process, the seat back 10 absorbs the kinetic energy of the occupants through resistance, improves the restraint position of the seat belt 30 on the occupants, and thus reduces the injuries to the occupants; at the same time, it can be applied to collision protection of drivers and passengers in future automatic and unmanned driving scenarios.

[0103] Example 2

[0104] like Figure 1 As shown, this embodiment provides a seat safety protection method, and the seat safety protection method includes the following steps:

[0105] S1. Determine whether the rotation function of the seat back 10 needs to be triggered according to the degree of the vehicle collision and the seat sitting state. If so, the rotation function of the seat back 10 is triggered;

[0106] S2. The seat back 10 overcomes the damping force and rotates in the direction of vehicle travel.

[0107] When the vehicle is inevitably involved in a collision, the rotation function of the seat back 10 is triggered according to the degree of the collision and the seat's sitting state. Under the inertia of the seat back 10 itself and the occupant, as well as the force of the seat belt, the seat back 10 rotates forward during the collision process, that is, it rotates in the direction of the vehicle's travel. During the rotation process, the damping force exerts a certain restraining force on the occupant and absorbs the kinetic energy of the occupant, thereby reducing the damage to the occupant. In this embodiment, the rotation function of the seat back is triggered by switching the switching device to the unlocked state so that the seat back can rotate relative to the seat basin. Of course, the switching device can also push the seat back to rotate forward at an angle between 10° and 15°. The seat back is actively pushed forward by the switching device to improve the reliability of the seat back rotation in the event of a frontal collision. In other embodiments, the triggering of the rotation function of the seat back can also be achieved through other structures.

[0108] Step S1 includes the following steps:

[0109] S11, judging whether the conditions for the airbag control unit to detonate are met according to the degree of vehicle collision, and if so, executing step S12;

[0110] S12, determining whether the seat is in a semi-reclining or lying state, if so, executing step S13;

[0111] S13, triggering the rotation function of the seat back 10.

[0112] When the collision of the vehicle is serious enough to require the detonation of the airbag control unit, if the seat back 10 is in a semi-reclining or flat position, the occupants will dive severely, and the head, neck, and chest of the occupants are far away from the front airbag. Even if the airbag is deployed, it cannot descend to effectively protect the occupants. Therefore, when the passenger is in a semi-reclining or flat position, the rotation function of the seat back 10 is triggered, so that in the event of a collision, the seat back 10 rotates in the direction of the vehicle's travel as the collision progresses, so as to reduce the impact force on the occupants during the collision, thereby reducing the damage to the occupants.

[0113] After step S12, the method further includes S13': triggering the seat belt pre-tightening and the headgear airbag 60 according to the detonation strategy. When the seat is in a semi-reclining or flat state, after a violent collision occurs in the vehicle, the seat belt pre-tightening and the headgear airbag 60 are triggered by the detonation strategy while the seat back 10 rotates forward. The seat belt pre-tightening exerts a restraining force on the driver and the passenger to reduce the risk of a secondary collision; on the other hand, the headgear airbag 60 protects the head, neck and chest of the human body to further reduce the damage to the driver and the passenger.

[0114] After step S12, it also includes S13": triggering the front airbag according to the detonation strategy. When the seat is in a semi-reclining or flat state, after a violent frontal collision of the vehicle occurs, the front airbag can also be triggered while the seat back 10 rotates forward, so that when the seat back 10 rotates to the maximum angle, even if the driver and passengers move forward under inertia, the front airbag can effectively protect the driver and passengers, thereby improving the safety performance. After step S2, there are the following steps: S3, judging whether the seat back 10 is rotated to the extreme position according to the rotation angle of the seat back 10, if so, entering step S4; S4, the seat back 10 stops rotating.

[0115] Example 3

[0116] The present embodiment provides a car, which includes the safety protection system of the seat as above. The safety protection system as above is adopted in the car seat. When a frontal collision occurs, by unlocking the switching device 40, the seat back 10 in a semi-lying or lying state can overcome the damping force and rotate in the direction of vehicle travel under the combined action of the inertia of the driver and the tension of the safety belt 30. In this process, the damping force can absorb the kinetic energy of the driver and the occupant to reduce the damage to the driver and the occupant. At the same time, the front airbag and the headgear airbag 60 of the transmission can also cushion the driver and the occupant and absorb the kinetic energy of the driver and the occupant, thereby reducing the damage to the driver and the occupant. The use of this safety protection system makes up for the defect that the automobile safety restraint system in the prior art is difficult to protect the driver and the occupant in the working sitting position and the leisure sitting position, and even causes more serious injuries.

[0117] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A seat safety protection method, characterized in that: The seat safety protection method comprises the following steps: S1. determining whether the seat back rotation function needs to be triggered according to the degree of the vehicle collision and the seat sitting state, and if so, the seat back rotation function is triggered; S2, the seat back overcomes the damping force and rotates in the direction of vehicle travel; Step S1 includes the following steps: S11, judging whether the conditions for the airbag control unit to detonate are met according to the degree of vehicle collision, and if so, executing step S12; S12, determining whether the seat is in a semi-reclining or lying state, if so, executing step S13; S13, triggering the seat back rotation function; In step S2, the power for the seat back to rotate comes from the inertia of the seat back and the human body during the collision, and / or the tension of the seat belt; In step S2, a switching device is provided in the seat back, and when the rotation function of the seat back is triggered, the switching device is unlocked, and the switching device can push the seat back to rotate forward; the switching device is rotatably connected to the seat back, and the switching device includes a first connecting portion and a second connecting portion, the first connecting portion is rotatably connected to the seat pot, and the second connecting portion is connected to the seat pot to limit the switching device from rotating around the first connecting portion relative to the seat pot; when the switching device is unlocked, the second connecting portion is separated from the seat pot; In step S13, the seat pot remains stationary, and the seat back is rotated relative to the seat pot in the direction of vehicle travel.

2. The seat safety protection method according to claim 1, characterized in that: After step S12, the following steps are also included: The seat belt pretensioner and headband airbag are triggered according to the detonation strategy.

3. The seat safety protection method according to claim 1, characterized in that: After step S12, the following steps are also included: The front airbag is triggered according to the detonation strategy.

4. The seat safety protection method according to any one of claims 1 to 3, characterized in that: After step S2, there are the following steps: S3, judging whether the seat back has been rotated to the limit position according to the rotation angle of the seat back, if so, proceeding to step S4; S4: the seat back stops rotating.

5. A seat safety protection system, characterized in that: The safety protection system comprises: Seat backs; a seat basin, the seat back being rotatable relative to the seat basin; A seat belt, wherein at least one fixing point of the seat belt is connected to the upper end of the seat back; A switching device, the switching device is rotatably connected to the seat back, the switching device is fixed to the seat basin; the switching device has a locked state and an unlocked state; When the vehicle does not collide or the degree of the collision does not need to trigger the rotation function of the seat back, the switching device is in a locked state; When the collision degree of the vehicle needs to trigger the rotation function of the seat back, the switching device is switched to the unlocked state, and the seat back can rotate relative to the seat pan in the direction of vehicle travel; When the switching device is switched to an unlocked state, the seat back and the switching device are relatively fixed, and the seat back and the switching device rotate relative to the seat pan at the same time; The switching device comprises a first connection part and a second connection part, the first connection part is rotatably connected to the seat pot, the second connection part is located at an end of the switching device away from the first connection part, and the second connection part is connected to the seat pot to limit the switching device from rotating around the first connection part relative to the seat pot; When the switching device is in an unlocked state, the second connecting part is separated from the seat basin; the safety protection system includes a control unit, which is electrically connected to the switching device, and the control unit controls the second connecting part to separate from the seat basin.

6. The seat safety protection system according to claim 5, characterized in that: The switching device comprises a rotating shaft and a switching body, wherein the rotating shaft is arranged at the first connecting portion; The rotating shaft is fixed to the seat basin, and the switching body is rotatably connected to the rotating shaft; Alternatively, the rotating shaft is fixed to the switching body, and the seat basin is rotatably connected to the rotating shaft.

7. The seat safety protection system according to claim 5, characterized in that: The second connecting portion is also connected to a pushing component, and the pushing component applies an oblique upward thrust to the second connecting portion to push the switching device to rotate forward.

8. The seat safety protection system according to claim 5, characterized in that: The first connecting portion is provided with an anti-reversal component, and the anti-reversal component restricts the switching device and the seat back from rotating in a direction away from the driving direction of the vehicle.

9. The seat safety protection system according to any one of claims 5 to 8, characterized in that: The safety protection system of the seat also includes an energy absorbing device for preventing the switching device from rotating relative to the seat basin, and the energy absorbing device is connected to the switching device and the seat basin at the same time.

10. The seat safety protection system according to any one of claims 5 to 8, characterized in that: The safety protection system comprises a recliner, and the seat back and the switching device are rotatably connected via the recliner.

11. The seat safety protection system according to claim 10, characterized in that: When the switching device is in an unlocked state, the recliner is in a locked state.

12. The seat safety protection system according to any one of claims 5 to 8, characterized in that: The safety protection system of the seat also includes a headgear airbag, which is arranged inside the seat back and is used to cover the head, neck and chest of the driver and passenger.

13. The seat safety protection system according to claim 12, characterized in that: The head cover airbag is installed on one side of the seat back close to the central channel.

14. The seat safety protection system according to any one of claims 5 to 8, characterized in that: The seat belt is a pre-tensioned seat belt.

15. A car, characterized in that: It comprises a safety protection system for a seat as described in any one of claims 5-14.

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