A backrest quick return mechanism and a cushion quick return mechanism based on a zero-gravity seat

Abstract

The application relates to a backrest quick-return mechanism based on a zero-gravity seat, and a cushion quick-return mechanism, which comprises a backrest framework located at the back of a seat and a cushion framework located at the cushion of the seat, the backrest framework is rotatably connected to the cushion framework through angle adjusters on both sides, a brushless angle adjuster motor for adjusting the angle of the angle adjuster is installed on the backrest framework, a backrest quick-return mechanism is installed between the backrest framework and the angle adjuster, the rear end of the cushion framework is hingedly connected to a bottom seat slide rail, the front end of the cushion framework is subjected to angle adjustment of the cushion framework through a front angle adjustment mechanism, a cushion quick-return mechanism is installed on the front angle adjustment mechanism, and the backrest quick-return mechanism and the cushion quick-return mechanism have the same structure. The application has the advantages that the backrest and the cushion can be quickly returned when the seat collides in a zero-gravity posture position, the restraint protection of the passenger is improved, and the harm caused by the collision is reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, and in particular to a backrest quick return mechanism and a seat cushion quick return mechanism based on a zero-gravity seat. Background Technology

[0002] Zero-gravity seats are an innovative type of seat that will be widely used in future driving scenarios. When using a zero-gravity seat, the person is in a reclining position, and the adjustment range of the seat belt is limited. In an emergency, the restraining force of the seat belt on the body is not as high as that of a normal sitting position, which poses a safety hazard. Although high-end vehicles now commonly use pre-collision modes to automatically return the backrest or seat cushion of the zero-gravity seat to its original position, there are still problems with the return not being timely, which may cause the seat belt to fail to function. Summary of the Invention

[0003] In view of the above problems, the purpose of this invention is to provide a backrest quick return mechanism and a seat cushion quick return mechanism based on a zero-gravity seat, so that after a collision, the zero-gravity seat can return to a suitable backrest angle and / or seat cushion angle according to a predetermined route through the quick return mechanism, thereby optimizing the sitting posture and improving the restraint and protection of the occupant, and overcoming the shortcomings of the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A rapid backrest return mechanism based on a zero-gravity seat includes: a backrest frame and an adjuster. The backrest frame is rotatably connected to a seat cushion frame via the adjusters on both sides. A rapid backrest return mechanism for rapid backrest return is installed between the backrest frame and the adjusters. The rapid backrest return mechanism includes: a rotating bracket power source installed near the rotation axis of the backrest frame; a first rotating bracket rotatably connected to the backrest frame and rotating under the drive of the rotating bracket power source; a first unlocking bracket rotatably connected to the backrest frame and movably engaged with the first rotating bracket; a first toothed plate bracket connected to the first unlocking bracket via toothed engagement; and a first energy absorber connecting the first toothed plate bracket and the backrest frame. One side of the first energy absorber is fixedly connected to the backrest frame, and the other side is fixedly connected to the first toothed plate bracket. The first energy absorber is used to unlock and return the first seat cushion frame after a vehicle collision. The toothed plate bracket rotates relative to the backrest frame. The side of the first toothed plate bracket away from the first energy absorber is fixed to the angle adjuster. A first spring connected to the backrest frame is provided on the first rotating bracket. Before a vehicle collision, the teeth of the first unlocking bracket and the first toothed plate bracket engage, causing the first unlocking bracket and the first toothed plate bracket to rotate synchronously. When a vehicle collision occurs, if the vehicle system sensor detects that the seat is not in its initial position, the vehicle system outputs a signal to the power source of the first rotating bracket. The power source of the first rotating bracket pushes the first rotating bracket to rotate against the tension of the first spring. The first rotating bracket drives the first unlocking bracket to rotate and separates the teeth of the first unlocking bracket from the first toothed plate bracket. The backrest frame is unlocked from the first toothed plate bracket. After a vehicle collision, the first energy absorber unlocks and causes the first toothed plate bracket and the backrest frame to rotate relative to each other, allowing the backrest frame to quickly return to its original position.

[0006] As a preferred embodiment of the present invention, the power source of the first rotating support includes: a first detonator and a first detonation pusher connected to the first detonator, wherein the first detonator drives the first rotating support to rotate through the first detonation pusher.

[0007] As a preferred embodiment of the present invention, the first rotating bracket includes: a rotating shaft body, a snap-fit ​​protrusion located on one end of the circumference of the rotating shaft body, a spring connecting hook located on the other end of the circumference of the rotating shaft body, and a hinge hole located in the middle of the rotating shaft body. The spring connecting hook is used to connect with a first spring or a second spring, and the snap-fit ​​protrusion is snapped into the slot of the first unlocking bracket or the second unlocking bracket.

[0008] As a preferred embodiment of the present invention, the first unlocking bracket includes: a bracket body, a slot formed at the upper end of the bracket body, a toothed groove formed at the lower end of the bracket body, and a rotating shaft hole located on one side of the bracket body, wherein the toothed groove engages with the teeth on the outer circumference of the toothed plate bracket.

[0009] Another objective of this invention is to provide a seat cushion quick return mechanism based on a zero-gravity seat, comprising: a seat cushion frame, the rear end of which is hinged to a bottom seat slide rail, the front end of which is adjusted for seat cushion frame angle via a set of front angle adjustment mechanisms, and a seat cushion quick return mechanism for quick return of the seat cushion frame is installed on a set of two front angle adjustment mechanisms.

[0010] The front angle adjustment mechanism includes: a lifting motor, a first lifting link hinged to the drive screw of the lifting motor, and a second lifting link hinged to the front end of the seat cushion frame. The two sides of the seat cushion quick return mechanism are respectively connected to the first lifting link and the second lifting link. The lifting motor pushes the first lifting link through the drive screw. The first lifting link drives the seat cushion quick return mechanism to rotate. During the rotation, the seat cushion quick return mechanism drives the second lifting link to push the seat cushion frame to rotate around the rear hinge point of the seat cushion frame.

[0011] The seat cushion quick return mechanism includes: a rotating bracket power source installed near the seat cushion frame; a second rotating bracket rotatably connected to the first lifting link and rotating under the push of the rotating bracket power source; a second unlocking bracket rotatably connected to the first lifting link and movably engaged with the second rotating bracket; a second toothed plate bracket connected to the second unlocking bracket via toothed engagement; and a second energy absorber connecting the second toothed plate bracket and the first lifting link. One side of the second energy absorber is fixedly connected to the first lifting link, and the other side is fixedly connected to the second toothed plate bracket. The second energy absorber is used to unlock and allow the second toothed plate bracket to rotate relative to the first lifting link after a vehicle collision. The side of the second toothed plate bracket away from the second energy absorber is fixedly connected to the second lifting link. The second rotating bracket is provided with... The second spring is connected to the first lifting link. Before a vehicle collision, the teeth of the second unlocking bracket and the second toothed plate bracket engage, causing the second unlocking bracket and the second toothed plate bracket to rotate synchronously. When a vehicle collision occurs, if the vehicle system sensor detects that the seat is not in its initial position, the vehicle system outputs a signal to the power source of the second rotating bracket. The power source of the second rotating bracket pushes the second rotating bracket to rotate against the tension of the second spring. The second rotating bracket drives the second unlocking bracket to rotate and separates the teeth of the second unlocking bracket from the teeth of the second toothed plate bracket. The first lifting link and the second toothed plate bracket are unlocked. After a vehicle collision, the second energy absorber is unlocked and causes the second toothed plate bracket and the first lifting link to rotate relative to each other, causing the second lifting link, which is fixed to the second toothed plate bracket, to drive the seat cushion frame to quickly return to its original position.

[0012] As a preferred embodiment of the present invention, the second rotating bracket includes: a rotating shaft body, a snap-fit ​​protrusion located on one end of the circumference of the rotating shaft body, a spring connecting hook located on the other end of the circumference of the rotating shaft body, and a hinge hole located in the middle of the rotating shaft body. The spring connecting hook is used to connect with a first spring or a second spring, and the snap-fit ​​protrusion snaps into the slot of a first unlocking bracket or a second unlocking bracket.

[0013] As a preferred embodiment of the present invention, the second unlocking bracket includes: a bracket body, a slot formed at the upper end of the bracket body, a toothed groove formed at the lower end of the bracket body, and a rotating shaft hole located on one side of the bracket body, wherein the toothed groove engages with the teeth on the outer circumference of the toothed plate bracket.

[0014] As a preferred embodiment of the present invention, the second lifting linkage includes: a return bracket and a support rod hinged to the return bracket, wherein the return bracket is fixedly connected to the second toothed plate bracket, and the free end of the support rod is hinged to the seat cushion frame.

[0015] As a preferred embodiment of the present invention, the first lifting link includes: a base support and a hinge lug located on one side of the base support, the hinge lug being hinged to the drive screw of the lifting motor, and the base support being hinged to the crossbeam of the bottom seat slide rail.

[0016] As a preferred embodiment of the present invention, the power source of the second rotating support includes: a second detonator and a second detonation pusher connected to the second detonator, wherein the second detonator drives the second rotating support to rotate through the second detonation pusher.

[0017] The advantages and positive effects of this invention are:

[0018] 1. In this invention, a quick-return mechanism for the backrest and a quick-return mechanism for the seat cushion are added to quickly return the unreturned backrest and seat cushion frames to their original positions. This improves the safety of the zero-gravity seat, enabling the backrest and seat cushion to quickly return to their original positions in the event of a collision in a zero-gravity position, thus enhancing the restraint and protection of the occupant.

[0019] 2. In this invention, the quick backrest return mechanism is installed between the backrest frame and the angle adjuster. After a vehicle collision, the quick backrest return mechanism can unlock and separate the backrest frame and the angle adjuster, so that the backrest frame can quickly return to its original position under the impact of the collision. After the backrest frame returns to its original position, it can also be locked and fixed by the quick backrest return mechanism.

[0020] 3. In this invention, the seat cushion quick return mechanism is installed on the front angle adjustment mechanism of the seat cushion frame, so that the seat cushion frame can quickly return to its original position while having angle adjustment capabilities.

[0021] 4. The quick-return mechanism for the backrest in this invention has the same structure and principle as the quick-return mechanism for the seat cushion. Both employ a two-stage unlocking method. A limiting connection bracket, consisting of a rotating bracket, an unlocking bracket, and a toothed plate bracket, connects the backrest frame and the adjuster. Then, a detonator separates and unlocks the unlocking bracket and the toothed plate bracket, thus achieving the separation and unlocking of the backrest frame and the adjuster. Since the unlocked backrest frame and the adjuster are still connected by an energy absorber, when the force of a vehicle collision exceeds the resistance of the two friction plates of the energy absorber, the energy absorber unlocks, allowing relative rotation between the backrest frame and the adjuster. Similarly, the first and second lifting links of the quick-return mechanism for the seat cushion are also connected or separated using a limiting connection bracket and an energy absorber. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a side view of the overall structure of the present invention.

[0024] Figure 3 This is a schematic diagram of the quick return mechanism for the backrest, the seat frame, and the installation structure of the adjuster of the present invention.

[0025] Figure 4 This is an exploded view of the overall structure of the quick return mechanism for the backrest of the present invention.

[0026] Figure 5 This is a schematic diagram of the locked state of the backrest quick return mechanism of the present invention.

[0027] Figure 6 This is a schematic diagram of the unlocked state of the backrest quick return mechanism of the present invention.

[0028] Figure 7 This is a schematic diagram of the initial position of the seat cushion according to the present invention.

[0029] Figure 8 This is a schematic diagram illustrating the principle of the seat cushion lifting position in this invention.

[0030] Figure 9 This is one of the installation diagrams of the seat cushion quick return mechanism of the present invention.

[0031] Figure 10 This is the second schematic diagram of the installation of the seat cushion quick return mechanism of the present invention.

[0032] Figure 11 This is a schematic diagram of the seat cushion quick return mechanism in the locked state of the present invention.

[0033] Figure 12 This is a schematic diagram of the unlocked state of the seat cushion quick return mechanism of the present invention.

[0034] Figure 13This is an exploded view of the seat cushion quick return mechanism of the present invention.

[0035] Figure 14 This is an exploded view of the energy absorber of the present invention.

[0036] Figure 15 This is a schematic diagram of the installation structure of the rotating bracket and unlocking bracket of the present invention.

[0037] Reference numerals: 1. Backrest frame; 2. Seat cushion frame; 3. Angle adjuster; 4. Brushless angle adjusting motor; 5. Backrest quick return mechanism; 5. First detonator; 501. First detonation push column; 502. First rotating bracket; 503. First spring; 504. First unlocking bracket; 505. First toothed plate bracket; 506. First energy absorber; 507. Tooth; 508. 509. Hinge shaft; 6. Bottom seat slide rail; 7. Front angle adjustment mechanism; 8. Lifting motor; 801. Drive screw; 802. First lifting link; 803. Second lifting link; 804. Base bracket; 805. Hinge. Ear 806, return bracket 807, support rod 808, seat cushion quick return mechanism 9, second detonator 901, second detonation push column 902, second rotating bracket 903, second spring 904, second unlocking bracket 905, second toothed plate bracket 906, second energy absorber 907, left friction disc 10, right friction disc 11, arc-shaped plate 12, rotating shaft body 13, snap-fit ​​protrusion 14, spring connecting hook 15, hinge hole 16, bracket body 17, slot 18, tooth groove 19, rotating shaft hole 20, hinge shafts a, b, c, d, e. Detailed Implementation

[0038] In the following description, numerous specific details are set forth for illustrative purposes and to provide a thorough understanding of one or more embodiments. However, it will be apparent that these embodiments may also be implemented without these specific details. In other instances, well-known structures and devices are shown in block diagram form for ease of description of one or more embodiments.

[0039] Example 1

[0040] See Figure 1-11This embodiment provides a rapid return mechanism based on a zero-gravity seat, including: a seat body, a backrest frame 1 located at the back of the seat, and a seat cushion frame 2 located at the seat cushion. The backrest frame 1 is rotatably connected to the seat cushion frame 2 via angle adjusters 3 on both sides. Two brushless angle adjusting motors 4 are installed on both sides of the backrest frame 1 for adjusting the angle of the angle adjusters respectively. A backrest rapid return mechanism 5 for rapid backrest return is installed between the backrest frame 1 and the angle adjusters 3. The rear end of the seat cushion frame 2 is hinged to the bottom seat slide rail 7 via a hinge shaft 6. The front end of the seat cushion frame 2 is angled by two symmetrically installed front angle adjusting mechanisms 8. A seat cushion rapid return mechanism 9 for rapid return of the seat cushion frame 2 is installed on the front angle adjusting mechanism 8. The backrest rapid return mechanism 5 and the seat cushion rapid return mechanism 9 have the same structure.

[0041] See Figure 1-5 The backrest quick return mechanism 5 in this embodiment includes: a first detonator 501, a first detonation pusher 502, a first rotating bracket 503, a first spring 504, a first unlocking bracket 505, a first toothed plate bracket 506, and a first energy absorber 507. The first rotating bracket 503 and the first unlocking bracket 505 are rotatably connected to the backrest frame 2 near the adjuster 3 via a rotating shaft. The first rotating bracket 503 and the first unlocking bracket 505 are movably engaged. The teeth 508 of the first unlocking bracket 505 mesh with the teeth 509 of the first toothed plate bracket 506. One side of the first energy absorber 507 is fixed to the backrest frame 1, and the other side is fixed to the first toothed plate bracket 506. The side of the first toothed plate bracket 506 away from the first energy absorber 507 is connected to... Angle adjuster 3 is fixedly connected. One end of the first spring 504 is fixedly connected to the backrest frame 1, and the other end is fixedly connected to the first rotating bracket 503. The first energy absorber 507 is used to unlock after a vehicle collision and make the first toothed plate bracket 506 rotate relative to the backrest frame 1. The first detonator 501 pushes the first rotating bracket 503 to rotate against the tension of the first spring 504 through the first detonation push post 502. The first rotating bracket 503 drives the first unlocking bracket 505 to rotate and separate the first unlocking bracket 505 from the teeth 508 and 509 of the first toothed plate bracket 506. The backrest frame 1 is unlocked from the first toothed plate bracket 506. The first energy absorber 507 unlocks after a vehicle collision and makes the first toothed plate bracket 506 rotate relative to the backrest frame 1, so that the backrest frame 1 quickly returns to its original position.

[0042] See Figure 9-10In this embodiment, the front angle adjustment mechanism 8 includes: a lifting motor 801, a first lifting link 803 hinged to the drive screw 802 of the lifting motor 801, and a second lifting link 804 hinged to the front end of the seat frame 2. The two sides of the seat quick return mechanism 9 are connected to the first lifting link 803 and the second lifting link 804 respectively. The lifting motor 801 drives the first lifting link 803 to rotate around the hinge axis e through the drive screw 802. The first lifting link 803 drives the seat quick return mechanism 9 to rotate. During the rotation, the seat quick return mechanism 9 drives the second lifting link 804 to push the seat frame 2 to rotate around the rear hinge axis 6 of the seat frame 2. The first lifting link 803 includes: a base bracket 805 and a hinge ear 806 located on one side of the base bracket 805. The hinge ear 806 is hinged to the drive screw 802 of the lifting motor 801. The base bracket 805 is hinged to the crossbeam of the bottom seat slide rail 7 via the hinge shaft e. The second lifting link 804 includes: a return bracket 807 and a support rod 808 hinged to the return bracket 807. The return bracket 807 is fixedly connected to the second toothed plate bracket 906. The free end of the support rod 808 is hinged to the seat cushion frame 2.

[0043] See Figure 7-13 The seat cushion quick return mechanism 9 in this embodiment includes: a second detonator 901, a second detonator pusher 902, a second rotating bracket 903, a second spring 904, a second unlocking bracket 905, a second toothed plate bracket 906, and a second energy absorber 907. The second rotating bracket 903 and the second unlocking bracket 905 are rotatably connected to the base bracket 805 of the first lifting link 803. The second rotating bracket 903 and the second unlocking bracket 905 are movably engaged. The teeth of the second unlocking bracket 905 are meshed with the teeth of the second toothed plate bracket 906. One side of the second energy absorber 907 is fixedly connected to the base bracket 805 of the first lifting link 803, and the other side is fixedly connected to the second toothed plate bracket 906. The side of the second toothed plate bracket 906 away from the second energy absorber 907 is connected to the return bracket of the second lifting link 804. 807 is fixedly connected. One end of the second spring 904 is fixedly connected to the base bracket 805 of the first lifting link 803, and the other end is fixedly connected to the second rotating bracket 903. The second energy absorber 907 is used to unlock after a vehicle collision and make the second toothed plate bracket 906 rotate relative to the first lifting link 803. The second detonator 901 pushes the second rotating bracket 903 to rotate against the tension of the second spring 904 through the second detonation push post 902. The second rotating bracket 903 drives the second unlocking bracket 905 to rotate and separate the teeth of the second unlocking bracket 905 from the teeth of the second toothed plate bracket 906, thereby unlocking the first lifting link 803 from the second toothed plate bracket 906. The second energy absorber 807 unlocks after a vehicle collision and makes the second toothed plate bracket 906 rotate relative to the first lifting link 803, so that the seat frame 2 quickly returns to its original position.

[0044] See Figure 15 In this embodiment, both the first rotating bracket 503 and the second rotating bracket 903 include: a rotating shaft body 13, a snap-fit ​​protrusion 14 located on one end of the circumference of the rotating shaft body 13, a spring connecting hook 15 located on the other end of the circumference of the rotating shaft body 13, and a hinge hole 16 located in the middle of the rotating shaft body 13. The spring connecting hook 15 is used to connect with the first spring 504 or the second spring 904. The snap-fit ​​protrusion 14 is snap-fitted with the slot of the first unlocking bracket 505 or the second unlocking bracket 905. Both the first unlocking bracket 505 and the second unlocking bracket 905 include: a bracket body 17, a slot 18 opened at the upper end of the bracket body 17, a tooth groove 19 opened at the lower end of the bracket body 17, and a rotating shaft hole 20 located on one side of the bracket body 17. The tooth groove 19 meshes with the teeth on the outer circumference of the toothed plate bracket.

[0045] See Figure 14 Furthermore, in this embodiment, both the first energy absorber 507 and the second energy absorber 907 include: a left friction disk 10, a right friction disk 11, and an arc-shaped plate 12 located between the left friction disk 10 and the right friction disk 11. The arc-shaped waves on both sides of the arc-shaped plate 12 correspond to the wave surfaces on the inner sides of the left friction disk 10 and the right friction disk 11. The arc-shaped plate 12 is disposable, and a new energy absorber or arc-shaped plate 12 is required after each damage.

[0046] Working principle: When the backrest frame 1 and seat cushion frame 2 are in a position outside the initial position, after the vehicle system detects the pre-collision signal, the backrest frame 1 first drives the angle adjuster 3 to return to its original position through the high-speed brushless angle adjustment motor 4. At the same time, the seat cushion frame 2 returns to its original position through the lifting motor 801. Before the vehicle collision, after the position sensor of the seat system detects that the backrest frame 1 and seat cushion frame 2 have completely returned to their original positions, the backrest quick return mechanism and the seat cushion quick return mechanism will not be activated. When the position sensor of the seat system detects that the backrest frame 1 and the seat cushion frame 2 have not fully returned to their original positions, the backrest quick return mechanism 5 and the seat cushion quick return mechanism 9 are activated. The backrest quick return mechanism 5 and the seat cushion quick return mechanism 9 have the same structure and principle, and both adopt a two-stage unlocking method. The backrest frame 1 and the adjuster 3 are connected by a limiting connection bracket composed of a first rotating bracket 503, a first unlocking bracket 505 and a first toothed plate bracket 506. When a detonation signal is received, the first detonator 501 drives the first rotating bracket 503 to rotate through the first detonation push column 502. The first rotating bracket 503 separates and unlocks the first unlocking bracket 505 and the first toothed plate bracket 506, thereby realizing the separation and unlocking of the backrest frame 1 and the adjuster 3. Since the backrest frame 1 and the angle adjuster 3 are still connected by the first energy absorber 507 after unlocking, when the force of the vehicle collision is greater than the resistance of the left friction disc 10 and the right friction disc 11 of the first energy absorber 507, the arc-shaped piece 12 of the second energy absorber 907 breaks and unlocks, realizing the relative rotation of the backrest frame 1 and the angle adjuster 3. Similarly, the first lifting link 803 and the second lifting link 804 of the seat cushion quick return mechanism 9 are also connected or separated by the limiting connection bracket and the energy absorber.

[0047] The specific process includes the following steps:

[0048] Step S1: When the vehicle system detects a pre-collision signal, the vehicle system outputs a pre-collision signal and uses the brushless angle adjustment motor 4 to quickly adjust the angle adjuster 3, so that the backrest frame 1 quickly returns to its original position.

[0049] Step S2: When a collision actually occurs and the vehicle system outputs a collision signal, if the seat position sensor detects that the seat back frame 1 and seat cushion frame 2 have not returned to their initial positions (because the time before the collision is less than the complete return time of the brushless angle adjustment motor), the vehicle system outputs a signal to the backrest quick return mechanism 5 and the seat cushion quick return mechanism 6. The backrest quick return mechanism 5 unlocks and separates the backrest frame 1 from the angle adjuster 3, thereby allowing the backrest frame 1 to quickly return to its original position. The seat cushion quick return mechanism 9 unlocks and separates the first lifting link 803 from the second lifting link 804, thereby allowing the seat cushion frame 2 to quickly return to its original position.

[0050] Step S31: The vehicle system outputs a signal to the first detonator 501. The first detonator 501 pushes the first rotating bracket 503 to rotate around its hinge axis a through the first detonation pusher 502. The first rotating bracket 503 pushes the first unlocking bracket 505 to rotate around its hinge axis b. During the rotation, the first unlocking bracket 505 separates from the teeth of the first toothed plate bracket 506, so that the backrest frame 1 is unlocked from the first toothed plate bracket 506 once.

[0051] Step S32: Use the first energy absorber 507 to unlock the backrest a second time. The first energy absorber 507 unlocks during the collision, causing the first toothed plate bracket 506, which is fixed to the angle adjuster 3, to separate from the backrest frame 1, and the backrest frame 1 quickly returns to its original position.

[0052] Step S33: After the backrest frame 1 quickly returns to its original position, the first spring 504 pulls the first rotating bracket 503 back to its original position. The first rotating bracket 503 drives the first unlocking bracket 505 to engage with the first toothed plate bracket 506, and the first toothed plate bracket 506, which is fixed to the angle adjuster 3, and the backrest frame 1 are locked.

[0053] Step S41: The vehicle system outputs a signal to the second detonator 901. The second detonator 901 pushes the second rotating bracket 903 to rotate around its hinge axis c through the second detonation pusher 902. The second rotating bracket 903 pushes the second unlocking bracket 905 to rotate around its hinge axis d. During the rotation, the second unlocking bracket 905 separates from the teeth of the second toothed plate bracket 906, so that the first lifting link 803 and the second toothed plate bracket 906 are unlocked once.

[0054] Step S42: Use the second energy absorber 907 to unlock the second time. The second energy absorber 907 unlocks during the collision, causing the second toothed plate bracket 906, which is fixed to the second lifting link 804, to separate from the first lifting link 803, and the seat frame 2 connected to the second lifting link 804 to quickly return to its original position.

[0055] Step S43: After the seat frame 2 quickly returns to its original position, the second spring 904 pulls the second rotating bracket 903 back to its original position. The second rotating bracket 903 drives the second unlocking bracket 905 to engage with the second toothed plate bracket 906. The second toothed plate bracket 906 locks the second lifting link 804 and the first lifting link 803.

[0056] Example 2

[0057] See Figure 1-5This embodiment provides a rapid backrest return mechanism based on a zero-gravity seat, including: a backrest frame 1 and an adjuster 3. The backrest frame 1 is rotatably connected to the seat cushion frame 2 via the adjusters 3 on both sides. A rapid backrest return mechanism 5 for rapid backrest return is installed between the backrest frame 1 and the adjusters 3. The rapid backrest return mechanism 5 includes: a first detonator 501 installed near the rotation axis of the backrest frame 1, and a first detonation pusher 502 rotatably connected to the backrest frame 1 and driven by the first detonator 501. The system comprises a first rotating bracket 503 that rotates downwards, a first unlocking bracket 505 that is rotatably connected to the backrest frame 1 and movably engaged with the first rotating bracket 503, a first toothed plate bracket 506 that is connected to the first unlocking bracket 505 via toothed engagement, and a first energy absorber 507 that connects the first toothed plate bracket 506 to the backrest frame 1. One side of the first energy absorber 507 is fixed to the backrest frame 1, and the other side is fixed to the first toothed plate bracket 506. The first energy absorber 507 is used to unlock and engage the first toothed plate bracket after a vehicle collision. The bracket 506 rotates relative to the backrest frame 1. The side of the first toothed plate bracket 506 away from the first energy absorber 507 is fixedly connected to the angle adjuster 3. A first spring 504 connected to the backrest frame 1 is provided on the first rotating bracket 503. Before a vehicle collision, the teeth of the first unlocking bracket 505 and the first toothed plate bracket 506 engage, causing the first unlocking bracket 505 and the first toothed plate bracket 506 to rotate synchronously. When a vehicle collision occurs, if the vehicle system sensors detect that the seat is not in the initial design position, the vehicle system outputs a signal. The first detonator 501 pushes the first rotating bracket 503 to rotate against the tension of the first spring 504 through the first detonation pusher 502. The first rotating bracket 503 drives the first unlocking bracket 505 to rotate and separate the teeth of the first unlocking bracket 505 from the teeth of the first toothed plate bracket 506. The backrest frame 1 is unlocked from the first toothed plate bracket 506. The first energy absorber 507 is unlocked after the vehicle collision and causes the first toothed plate bracket 506 to rotate relative to the backrest frame 1, so that the backrest frame 1 quickly returns to its original position.

[0058] In this embodiment, the power source for the rotating support consists of a first detonator 501 and a first detonation pusher 502, or any power mechanism capable of driving the first rotating support 503 to rotate.

[0059] Example 3

[0060] This embodiment provides a seat cushion quick return mechanism based on a zero-gravity seat, including: a seat cushion frame 2, the rear end of which is hinged to a bottom seat slide rail 7 via a hinge shaft 6, and the front end of which is adjusted by a set of front angle adjustment mechanisms 8. A quick return mechanism 9 for the seat cushion frame 2 is mounted on each of the two front angle adjustment mechanisms 8. The front angle adjustment mechanism 8 includes: a lifting motor 801, a first lifting link 803 hinged to a drive screw 802 of the lifting motor 801, and a second lifting link 804 hinged to the front end of the seat cushion frame 2. The two sides of the quick return mechanism 9 are connected to the first lifting link 803 and the second lifting link 804, respectively. 1. The first lifting link 803 is pushed by the drive screw 802, which drives the seat cushion quick return mechanism 9 to rotate. During the rotation, the seat cushion quick return mechanism 9 drives the second lifting link 804 to push the seat cushion frame 2 to rotate around the rear hinge shaft 6 of the seat cushion frame 2. The seat cushion quick return mechanism 9 includes: a second detonator 901 installed near the seat cushion frame 2, a second detonator pusher 902 connected to the second detonator 901, a second rotating bracket 903 rotatably connected to the first lifting link 803 and rotating under the push of the second detonator pusher 902, a second unlocking bracket 905 rotatably connected to the first lifting link 803 and movably engaged with the second rotating bracket 903, and a toothed connection with the second unlocking bracket 905. The system includes a second toothed plate bracket 906 and a second energy absorber 907 connecting the second toothed plate bracket 906 and the first lifting link 803. One side of the second energy absorber 907 is fixed to the first lifting link 803, and the other side is fixed to the second toothed plate bracket 906. The second energy absorber 907 is used to unlock the second toothed plate bracket 906 and allow the second toothed plate bracket 906 to rotate relative to the first lifting link 803 after a vehicle collision. The side of the second toothed plate bracket 906 away from the second energy absorber 907 is fixed to the second lifting link 804. A second spring 904 connected to the first lifting link 803 is provided on the second rotating bracket 903. Before a vehicle collision, the second unlocking bracket 905 engages with the teeth of the second toothed plate bracket 906, causing the second unlocking bracket 905 to engage with the teeth of the second toothed plate bracket 906. 6. Synchronous rotation: When a vehicle collision occurs, if the vehicle system sensors detect that the seat is not in its initial design position, the vehicle system outputs a signal to the second detonator 901. The second detonator 901 pushes the second rotating bracket 903 to rotate against the tension of the second spring 904 via the second detonation push column 902. The second rotating bracket 903 drives the second unlocking bracket 905 to rotate and separates the teeth of the second unlocking bracket 905 from the teeth of the second toothed plate bracket 906. The first lifting link 803 unlocks the second toothed plate bracket 906. The second energy absorber 907 unlocks after the vehicle collision and causes the second toothed plate bracket 906 to rotate relative to the first lifting link 803, causing the second lifting link 804, which is fixed to the second toothed plate bracket 906, to drive the seat cushion frame 2 to quickly return to its original position.

[0061] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A backrest quick return mechanism based on a zero-gravity seat, comprising: A backrest frame and an angle adjuster are provided. The backrest frame is rotatably connected to the seat cushion frame via angle adjusters on both sides. The backrest frame is characterized by a quick-return mechanism for rapid backrest return, which includes: a rotating bracket power source mounted near the rotating axis of the backrest frame; a first rotating bracket rotatably connected to the backrest frame and rotating under the drive of the rotating bracket power source; a first unlocking bracket rotatably connected to the backrest frame and movably engaged with the first rotating bracket; a first toothed plate bracket connected to the first unlocking bracket via toothed engagement; and a first energy absorber connecting the first toothed plate bracket and the backrest frame. One side of the first energy absorber is fixed to the backrest frame, and the other side is fixed to the first toothed plate bracket. The first energy absorber is used to unlock and reposition the first toothed plate bracket after a vehicle collision. The frame rotates relative to each other. The side of the first toothed plate bracket away from the first energy absorber is fixedly connected to the angle adjuster. The first rotating bracket is provided with a first spring connected to the backrest frame. Before the vehicle collision, the teeth of the first unlocking bracket and the first toothed plate bracket engage, causing the first unlocking bracket and the first toothed plate bracket to rotate synchronously. When the vehicle collision occurs, if the vehicle system sensor detects that the seat is not in the initial position, the vehicle system outputs a signal to the power source of the first rotating bracket. The power source of the first rotating bracket pushes the first rotating bracket to rotate against the tension of the first spring. The first rotating bracket drives the first unlocking bracket to rotate and separates the teeth of the first unlocking bracket from the first toothed plate bracket. The backrest frame is unlocked from the first toothed plate bracket. After the vehicle collision, the first energy absorber is unlocked and the first toothed plate bracket and the backrest frame rotate relative to each other, causing the backrest frame to quickly return to its original position.

2. The backrest quick return mechanism based on a zero-gravity seat according to claim 1, characterized in that, The power source for the first rotating support includes: a first detonator and a first detonation pusher connected to the first detonator. The first detonator drives the first rotating support to rotate through the first detonation pusher.

3. The backrest quick return mechanism based on a zero-gravity seat according to claim 1, characterized in that, The first rotating bracket includes: a rotating shaft body, a snap-fit ​​protrusion on one end of the circumference of the rotating shaft body, a spring connecting hook on the other end of the circumference of the rotating shaft body, and a hinge hole in the middle of the rotating shaft body. The spring connecting hook is used to connect with a first spring or a second spring, and the snap-fit ​​protrusion is snapped into the slot of the first unlocking bracket or the second unlocking bracket.

4. The backrest quick return mechanism based on a zero-gravity seat according to claim 1, characterized in that, The first unlocking bracket includes: a bracket body, a slot formed at the upper end of the bracket body, a toothed groove formed at the lower end of the bracket body, and a pivot hole located on one side of the bracket body, wherein the toothed groove engages with the teeth on the outer circumference of the toothed plate bracket.

5. A seat cushion quick return mechanism based on a zero-gravity seat, comprising: A seat cushion frame, characterized in that the rear end of the seat cushion frame is hinged to the bottom seat slide rail, and the front end of the seat cushion frame is adjusted for angle adjustment through a set of front angle adjustment mechanisms. A quick return mechanism for the seat cushion frame is installed on the set of two front angle adjustment mechanisms. The front angle adjustment mechanism includes: a lifting motor, a first lifting link hinged to the drive screw of the lifting motor, and a second lifting link hinged to the front end of the seat cushion frame. The two sides of the seat cushion quick return mechanism are respectively connected to the first lifting link and the second lifting link. The lifting motor pushes the first lifting link through the drive screw. The first lifting link drives the seat cushion quick return mechanism to rotate. During the rotation, the seat cushion quick return mechanism drives the second lifting link to push the seat cushion frame to rotate around the rear hinge point of the seat cushion frame. The seat cushion quick return mechanism includes: a rotating bracket power source; a second rotating bracket rotatably connected to the first lifting link and rotating under the push of the rotating bracket power source; a second unlocking bracket rotatably connected to the first lifting link and movably engaged with the second rotating bracket; a second toothed plate bracket connected to the second unlocking bracket via toothed engagement; and a second energy absorber connecting the second toothed plate bracket and the first lifting link. One side of the second energy absorber is fixedly connected to the first lifting link, and the other side is fixedly connected to the second toothed plate bracket. The second energy absorber is used to unlock and allow the second toothed plate bracket to rotate relative to the first lifting link after a vehicle collision. The side of the second toothed plate bracket away from the second energy absorber is fixedly connected to the second lifting link. The second rotating bracket is provided with a connection to the first lifting link. The second spring connected to the rod engages with the teeth of the second unlocking bracket and the second toothed plate bracket before a vehicle collision, causing the second unlocking bracket and the second toothed plate bracket to rotate synchronously. When a vehicle collision occurs, if the vehicle system sensor detects that the seat is not in its initial position, the vehicle system outputs a signal to the power source of the second rotating bracket. The power source of the second rotating bracket pushes the second rotating bracket to rotate against the tension of the second spring. The second rotating bracket drives the second unlocking bracket to rotate and separates the teeth of the second unlocking bracket from those of the second toothed plate bracket. The first lifting link unlocks the second toothed plate bracket. The second energy absorber unlocks after a vehicle collision and causes the second toothed plate bracket to rotate relative to the first lifting link, causing the second lifting link, which is fixed to the second toothed plate bracket, to drive the seat cushion frame to quickly return to its original position.

6. A seat cushion quick return mechanism based on a zero-gravity seat according to claim 5, characterized in that, The second rotating bracket includes: a rotating shaft body, a snap-fit ​​protrusion on one end of the circumference of the rotating shaft body, a spring connecting hook on the other end of the circumference of the rotating shaft body, and a hinge hole in the middle of the rotating shaft body. The spring connecting hook is used to connect with a first spring or a second spring, and the snap-fit ​​protrusion snaps into the slot of a first unlocking bracket or a second unlocking bracket.

7. A seat cushion quick return mechanism based on a zero-gravity seat according to claim 5, characterized in that, The second unlocking bracket includes: a bracket body, a slot opened at the upper end of the bracket body, a toothed groove opened at the lower end of the bracket body, and a rotating shaft hole located on one side of the bracket body, wherein the toothed groove engages with the teeth on the outer circumference of the toothed plate bracket.

8. A seat cushion quick return mechanism based on a zero-gravity seat according to claim 5, characterized in that, The second lifting link includes: a return bracket and a support rod hinged to the return bracket. The return bracket is fixedly connected to the second toothed plate bracket, and the free end of the support rod is hinged to the seat frame.

9. A seat cushion quick return mechanism based on a zero-gravity seat according to claim 5, characterized in that, The first lifting link includes: a base support and a hinge lug located on one side of the base support. The hinge lug is hinged to the drive screw of the lifting motor, and the base support is hinged to the crossbeam of the bottom seat slide rail.

10. A seat cushion quick return mechanism based on a zero-gravity seat according to claim 5, characterized in that, The power source for the second rotating support includes: a second detonator and a second detonation pusher connected to the second detonator. The second detonator drives the second rotating support to rotate through the second detonation pusher.

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