A zero-gravity seat with collapsible return

Abstract

The utility model relates to the technical field of automobile seat, disclose a kind of zero gravity seat of collapsible reset, it is including: pedestal, seat part, backrest and zero gravity adjusting mechanism, it is set between pedestal and seat part, including screw rod motor, zero gravity support and upper connecting rod, zero gravity support is equipped with collapse guide slot and collapse energy-absorbing structure, collapse energy-absorbing structure is set in the end close to collapse guide slot;The upper end of upper connecting rod is rotatably connected with seat part, and the lower end of upper connecting rod is rotatably connected with zero gravity support, and with collapse energy-absorbing structure active resistance;When conventional sitting posture, the force direction of upper connecting rod lower end to zero gravity support is perpendicular or close to vertical with collapse guide slot.The utility model has the advantages that, by collapse energy-absorbing structure absorption collision energy, and seat recovery conventional sitting posture, can effectively reduce the harm to passenger, and its overall structure is simple, low in cost.

Description

Technical Field

[0001] This utility model relates to the field of automotive seat technology, and in particular to a collapsible zero-gravity seat. Background Technology

[0002] When a car seat is in zero-gravity mode, the seatbelt can easily strangle a passenger in the event of a collision. Moreover, the seatbelt's protective effect on passengers is limited in this state. Therefore, the car seat needs to be able to quickly return to its designed position after a collision in order to reduce passenger injury.

[0003] Existing zero-gravity seats typically return to their designed position in the event of a collision in two main ways: active return and passive return. Active return generally uses a drive mechanism (such as a large motor) to quickly return the seat to its intended position. Passive return generally relies on inertia to return the seat to its designed position. However, the structures used for collision return in existing zero-gravity seats are complex and costly. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the existing technology, the technical problem to be solved by this utility model is to propose a low-cost, simple-structure collapsible zero-gravity seat.

[0005] The technical solution adopted by this utility model to solve its technical problem is to propose a collapsible zero-gravity seat, comprising:

[0006] Base;

[0007] The seat is movably mounted on the base;

[0008] The backrest is rotatably mounted on the seat.

[0009] A zero-gravity adjustment mechanism, disposed between the base and the seat, includes a lead screw motor, a zero-gravity support, and an upper connecting rod. The zero-gravity support is rotatably mounted on the base and has a collapse guide groove and a collapse energy-absorbing structure. The collapse energy-absorbing structure is located at one end near the collapse guide groove. The upper end of the upper connecting rod is rotatably connected to the seat, and the lower end of the upper connecting rod is rotatably connected to the zero-gravity support and moves against the collapse energy-absorbing structure. One end of the lead screw motor is a motor mounting end, and the other end is a telescopic end. One of the motor mounting end and the telescopic end is rotatably connected to the base, and the other is rotatably connected to the zero-gravity support.

[0010] In a normal sitting posture, the direction of the force exerted by the lower end of the upper connecting rod on the zero-gravity support is perpendicular or nearly perpendicular to the collapsible guide groove.

[0011] Furthermore, in a zero-gravity posture, the direction of the force exerted by the lower end of the upper connecting rod on the zero-gravity support is collinear or nearly collinear with the collapsible guide groove;

[0012] When a collision occurs in a zero-gravity state, the lower end of the upper link impacts the collapsible energy-absorbing structure and slides along the collapsible guide groove to the end of the collapsible guide groove away from the collapsible energy-absorbing structure. The collapsible energy-absorbing structure collapses to absorb the collision energy, and the seat returns to a normal sitting posture.

[0013] Furthermore, the lower end of the upper connecting rod is provided with a hinge, the upper connecting rod is rotatably connected to the zero gravity support through the hinge, and the hinge is in motion opposed to the collapsible energy-absorbing structure;

[0014] When a collision occurs in a zero-gravity state, the hinge breaks through the collapsible energy-absorbing structure and slides into the collapsible guide groove.

[0015] Furthermore, the collapsible energy-absorbing structure is configured as a collapsible sheet;

[0016] The collapsible plate includes a fixing part, a connecting part, and a limiting ring. The connecting part is connected between the fixing part and the limiting ring, and the connecting part is provided with a plurality of strength weakening grooves. The fixing part is fixedly connected to the zero gravity support, and the hinge is inserted through the limiting ring.

[0017] When a collision occurs in a zero-gravity state, the hinge impacts the limiting ring, which can break the connecting part and cause it to slide into the collapsible guide groove.

[0018] Furthermore, the fixing part is arranged circumferentially along the limiting ring, and the angle between the line connecting the center of the limiting ring and one end of the fixing part and the line connecting the limiting ring and the other end of the fixing part is greater than 90 degrees.

[0019] Furthermore, the connecting portion is provided with a plurality of strength weakening grooves spaced apart.

[0020] Furthermore, the zero-gravity support is provided with a circular hole, which is located on the extension line of the collapse guide groove and is not connected to the collapse guide groove, forming the collapse energy absorption structure between the circular hole and the collapse guide groove;

[0021] The collapsible energy-absorbing structure has a strength-weakening notch on the side near the collapsible guide groove;

[0022] When a collision occurs in a zero-gravity state, the hinge impacts the collapsible energy-absorbing structure, which may break at the strength-weakening notch, and the hinge slides into the collapsible guide groove.

[0023] Furthermore, the hinge has a cylindrical surface, which is hinged to the zero-gravity support.

[0024] The diameter of the cylindrical surface is greater than the width of the collapsible guide groove.

[0025] Furthermore, the zero-gravity support is provided with a limiting notch, and the base is provided with a square tube;

[0026] When a collision occurs in a zero-gravity state, the lower end of the upper connecting rod impacts the collapsible energy-absorbing structure and slides along the collapsible guide groove to the end of the collapsible guide groove away from the collapsible energy-absorbing structure; the front end of the seat descends, the seat returns to a normal sitting posture, and the two side walls of the square tube abut against the two side walls of the limiting notch, and the limiting notch limits the seat.

[0027] Furthermore, the lead screw motor includes a motor body, an output lead screw on the motor body, a telescopic sleeve fitted on the output lead screw, and the telescopic sleeve being threadedly connected to the output lead screw;

[0028] The motor mounting end is located on the motor body, and the telescopic end is located on the telescopic rod sleeve.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] In this invention, a collapsible energy-absorbing structure and a collapsible guide groove are provided on the zero-gravity support. The collapsible energy-absorbing structure is located close to the collapsible guide groove, and the lower end of the upper connecting rod moves against the collapsible energy-absorbing structure. If the seat collides in a zero-gravity posture, the collision energy is absorbed by the collapsible energy-absorbing structure, and the seat returns to a normal sitting posture, which can effectively reduce the injury to the occupant. In the normal sitting posture, the force exerted by the lower end of the upper link on the zero-gravity support is perpendicular or nearly perpendicular to the crumple guide groove, so the crumple groove is not effective and the lower end of the upper link will not break through the crumple energy absorption structure and slide into the crumple guide groove. In the zero-gravity posture, the force exerted by the lower end of the upper link on the zero-gravity support is collinear or nearly collinear with the crumple guide groove, so the crumple guide groove is in a pre-crushing state. If a collision occurs, the lower end of the upper link breaks through the crumple energy absorption structure, slides into the crumple guide groove, and slides along the crumple guide groove to its lower end. The front of the seat sinks, and the seat returns to the normal sitting posture. The overall structure is simple, has good structural stability, and is low in cost.

[0031] In one implementation of this invention, the collapsible energy-absorbing structure is configured as a collapsible plate. The collapsible plate includes a fixing part, a connecting part, and a limiting ring. The connecting part connects the fixing part and the limiting ring, and has several strength-weakening grooves. When a collision occurs in a zero-gravity state, the hinge at the lower end of the upper connecting rod impacts the limiting ring. Due to the strength-weakening grooves, the connecting part breaks, and the hinge slides into the collapsible guide groove, restoring the seat to its normal sitting posture. The number of strength-weakening grooves can be adjusted to adjust the critical breaking force of the connecting part, making it convenient to use.

[0032] In this invention, the fixing part of the collapsible plate is arranged along the circumference of the limiting ring. The line connecting the center of the limiting ring and one end of the fixing part forms an angle greater than 90 degrees with the other end of the limiting ring and the fixing part. This ensures that the span of the fixing part is large enough and the connection is reliable. It also ensures that the connecting part has sufficient width to adjust the number of strength weakening grooves and ensures a wide range of adjustment for the critical fracture force.

[0033] In another implementation of this invention, the circular hole on the zero-gravity support is located on the extension line of the collapsible guide groove and is not connected to the collapsible guide groove. A collapsible energy-absorbing structure is formed between the circular hole and the collapsible guide groove, and a strength-weakening notch is provided on the side of the collapsible energy-absorbing structure closest to the collapsible guide groove. When a collision occurs in the zero-gravity posture, the hinge impacts the collapsible energy-absorbing structure, which can break at the strength-weakening notch. The hinge slides into the collapsible guide groove, and the seat returns to a normal sitting posture. Its structure is simple. Attached Figure Description

[0034] Figure 1 This is a structural diagram of the seat of this utility model in its normal upright posture;

[0035] Figure 2 for Figure 1 A plan view;

[0036] Figure 3 This is a structural diagram of the seat in a zero-gravity position.

[0037] Figure 4 for Figure 3 A plan view;

[0038] Figure 5 This is a structural diagram of a seat recovering to a normal sitting posture after a collision in a zero-gravity posture.

[0039] Figure 6 for Figure 5 A plan view;

[0040] Figure 7 This is a schematic diagram of one implementation structure of the zero-gravity support in this utility model;

[0041] Figure 8This is a schematic diagram of the structure of the seat in zero-gravity posture in Example 2;

[0042] Figure 9 for Figure 8 A schematic diagram of the zero-gravity support structure.

[0043] In the picture:

[0044] 1. Base;

[0045] 2. Seat; 20. Square tube;

[0046] 3. Backrest;

[0047] 4. Zero gravity adjustment mechanism; 40. Lead screw motor; 41. Zero gravity support; 42. Upper connecting rod; 43. Collapsible energy absorption structure; 401. Motor body; 402. Output lead screw; 403. Telescopic sleeve; 401A. Motor mounting end; 403A. Telescopic end; 410. Collapsible guide groove; 411. Circular hole; 412. Limiting notch; 420. Hinge; 430. Strength weakening notch; 431. Fixing part; 432. Connecting part; 433. Limiting ring; 432A. Strength weakening groove. Detailed Implementation

[0048] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0049] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0050] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0052] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0053] Example 1:

[0054] like Figures 1-7 As shown, this embodiment of a collapsible zero-gravity seat can absorb collision energy through the collapsible energy-absorbing structure 43, and the seat returns to a normal sitting posture. The zero-gravity seat of this embodiment mainly includes:

[0055] Base 1;

[0056] The seat 2 is movably mounted on the base 1;

[0057] The backrest 3 is rotatably mounted on the seat 2;

[0058] The zero-gravity adjustment mechanism 4 is disposed between the base 1 and the seat 2, and includes a lead screw motor 40, a zero-gravity support 41, and an upper connecting rod 42. The zero-gravity support 41 is rotatably disposed on the base 1, and the zero-gravity support 41 is provided with a collapse guide groove 410 and a collapse energy absorption structure 43. The collapse energy absorption structure 43 is disposed at one end near the collapse guide groove 410. The upper end of the upper connecting rod 42 is rotatably connected to the seat 2, and the lower end of the upper connecting rod 42 is rotatably connected to the zero-gravity support 41 and moves against the collapse energy absorption structure 43. One end of the lead screw motor 40 is a motor mounting end 401A, and the other end of the lead screw motor 40 is a telescopic end 403A. One of the motor mounting end 401A and the telescopic end 403A is rotatably connected to the base 1, and the other is rotatably connected to the zero-gravity support 41.

[0059] When the car seat is in a normal sitting posture (i.e., the designed position), the direction of the force exerted by the lower end of the upper linkage 42 on the zero-gravity support 41 is perpendicular or nearly perpendicular to the collapsible guide groove 410 (e.g., Figure 1(The angle formed by the two dashed lines). At this time, the direction of the force exerted by the lower end of the upper connecting rod 42 on the zero-gravity support 41 is perpendicular or nearly perpendicular to the collapse guide groove 410, ensuring that the lower end of the upper connecting rod 42 will not slide into the collapse guide groove 410, and the collapse guide groove 410 will not function at this time.

[0060] When the car seat is in a zero-gravity position, the force exerted by the lower end of the upper link 42 on the zero-gravity support 41 is collinear or nearly collinear with the crumple zone 410. At this time, the force exerted by the lower end of the upper link 42 on the zero-gravity support 41 acts on the crumple energy-absorbing structure 43. If a collision occurs in this state, the lower end of the upper link 42 impacts the crumple energy-absorbing structure 43, destroying the crumple energy-absorbing structure 43. The lower end of the upper link 42 then slides along the crumple guide zone 410 to the end of the crumple guide zone 410 away from the crumple energy-absorbing structure 43. The crumple energy-absorbing structure 43 then crumples to absorb the collision energy, the front end of the seat 2 sinks, and the seat returns to its normal sitting posture.

[0061] To explain, when the car seat is in a normal sitting position, the direction of the force exerted by the lower end of the upper link 42 on the zero-gravity support 41 is optimally perpendicular to the collapsible guide groove 410, ensuring that the collapsible guide groove 410 is not inactive. Of course, the collapsible guide groove 410 can also be inactive when the direction of the force exerted by the lower end of the upper link 42 on the zero-gravity support 41 is nearly perpendicular to it; for example, the angle between the two can be between 85 and 95 degrees. When the car seat is in a zero-gravity position, the direction of the force exerted by the lower end of the upper link 42 on the zero-gravity support 41 is optimally collinear with the collapsible guide groove 410, ensuring that the collapsible guide groove 410 enters a pre-collapse state. Of course, the collapsible guide groove 410 can also enter a pre-collapse state when the direction of the force exerted by the lower end of the upper link 42 on the zero-gravity support 41 is nearly collinear with it; for example, the angle between the two is 175 degrees.

[0062] In actual use, this embodiment has a collapsible energy-absorbing structure 43 and a collapsible guide groove 410 on the zero-gravity support 41. The collapsible energy-absorbing structure 43 is located close to the collapsible guide groove 410, and the lower end of the upper connecting rod 42 moves against the collapsible energy-absorbing structure 43. If the seat collides in a zero-gravity posture, the collision energy is absorbed by the collapsible energy-absorbing structure 43, and the seat 2 returns to a normal sitting posture, which can effectively reduce the injury to the occupant. In the normal sitting posture, the force exerted by the lower end of the upper link 42 on the zero-gravity support 41 is perpendicular or nearly perpendicular to the collapse guide groove 410, so the collapse groove is not effective and the lower end of the upper link 42 will not break through the collapse energy absorption structure 43 and slide into the collapse guide groove 410. In the zero-gravity posture, the force exerted by the lower end of the upper link 42 on the zero-gravity support 41 is collinear or nearly collinear with the collapse guide groove 410, so the collapse guide groove 410 is in a pre-collapse state. If a collision occurs, the lower end of the upper link 42 breaks through the collapse energy absorption structure 43, slides into the collapse guide groove 410, and slides along the collapse guide groove 410 to its lower end. The front end of the seat 2 sinks, and the seat returns to the normal sitting posture. The overall structure is simple, has good structural stability, and is low in cost.

[0063] Specifically, in this embodiment, the lower end of the upper connecting rod 42 is provided with a hinge 420. The hinge 420 is preferably, but not limited to, a stepped bolt. The upper connecting rod 42 is rotatably connected to the zero-gravity support 41 through the hinge 420, and the hinge 420 moves against the collapsible energy-absorbing structure 43. When a collision occurs while the seat is in a zero-gravity posture, the hinge 420 breaks through the collapsible energy-absorbing structure 43 and slides into the collapsible guide groove 410, whereby the collapsible energy-absorbing structure 43 can absorb part of the collision energy.

[0064] The hinge 420 has a cylindrical surface, which is hinged to the circular hole 411 on the zero gravity support 41. The diameter of the cylindrical surface is larger than the width of the collapse guide groove 410, so that when a collision occurs in a zero gravity posture, the hinge 420 breaks through the collapse energy absorption structure 43 and slides into the collapse guide groove 410. During the sliding process, it can continue to absorb part of the collision energy.

[0065] In this embodiment, the collapsible energy-absorbing structure 43 is configured as a collapsible plate, which includes a fixing part 431, a connecting part 432, and a limiting ring 433. The connecting part 432 is connected between the fixing part 431 and the limiting ring 433, and the connecting part 432 is provided with a plurality of strength weakening grooves 432A. The fixing part 431 is fixedly connected to the zero-gravity support 41, and the hinge 420 passes through the limiting ring 433. In actual use, when a collision occurs in the zero-gravity posture, the hinge 420 impacts the limiting ring 433, breaking the connecting part 432. The hinge 420 slides into the collapsible guide groove 410 and slides from the upper end to the lower end of the collapsible guide groove 410, causing the front end of the seat 2 to descend and the seat to return to a normal sitting posture.

[0066] Furthermore, the fixing portion 431 of the collapsible piece is arranged circumferentially along the limiting ring 433. The angle formed by the line connecting the center of the limiting ring 433 and one end of the fixing portion 431 with the line connecting the limiting ring 433 and the other end of the fixing portion 431 is greater than 90 degrees, ensuring that the span of the fixing portion 431 is large enough. A plurality of strength weakening grooves 432A are spaced apart on the connecting portion 432.

[0067] In practical use, the collapsible energy-absorbing structure 43 of this embodiment is configured as a collapsible plate. The collapsible plate includes a fixing part 431, a connecting part 432, and a limiting ring 433. The connecting part 432 connects the fixing part 431 and the limiting ring 433, and the connecting part 432 is provided with a plurality of strength weakening grooves 432A. When a collision occurs in a zero-gravity posture, the hinge 420 at the lower end of the upper connecting rod 42 impacts the limiting ring 433. Due to the strength weakening grooves 432A, the connecting part 432 will break off, and the hinge 420 will slide into the collapsible guide groove 410, and the seat will return to a normal sitting posture. The number of strength weakening grooves 432A can be adjusted to adjust the breaking critical force of the connecting part 432, making it convenient to use. Furthermore, in the collapsible disc, the fixing part 431 is arranged circumferentially along the limiting ring 433. The line connecting the center of the limiting ring 433 and one end of the fixing part 431 forms an angle greater than 90 degrees with the other end of the limiting ring 433 and the fixing part 431, ensuring that the span of the fixing part 431 is large enough and the connection is reliable. It also ensures that the connecting part 432 has sufficient width to adjust the number of strength weakening grooves 432A, ensuring a wide range of adjustment for the fracture critical force.

[0068] Preferably, in this embodiment, the zero-gravity support 41 is provided with a limiting notch 412, and the seat 2 is provided with a square tube 20. When a collision occurs in the zero-gravity posture, the lower end of the upper connecting rod 42 impacts the collapsible energy-absorbing structure 43 and slides along the collapsible guide groove 410 to the end of the collapsible guide groove 410 away from the collapsible energy-absorbing structure 43; the front end of the seat 2 descends, the seat returns to the normal sitting posture, and the two side walls of the square tube 20 abut against the two side walls of the limiting notch 412 respectively. The limiting notch 412 limits the seat 2, ensuring the structural stability of the seat when it returns to the initial sitting posture.

[0069] The lead screw motor 40 includes a motor body 401, an output lead screw 402 on the motor body 401, and a telescopic sleeve 403 fitted onto the output lead screw 402, with the telescopic sleeve 403 threadedly connected to the output lead screw 402. The motor mounting end 401A is located on the motor body 401, and the telescopic end 403A is located on the telescopic sleeve 403. The mounting positions of the two ends of the lead screw motor 40 are interchangeable to facilitate the use of space under the seat 2 and avoid interference with the installation of other components. Furthermore, by driving the telescopic sleeve 403 to extend and retract via the output lead screw 402, the car seat can switch between a zero-gravity posture and a conventional sitting posture.

[0070] Example 2:

[0071] like Figures 8-9 As shown, the main difference between this embodiment of the collapsible zero-gravity seat and the first embodiment lies in the specific structure of the collapsible energy-absorbing structure 43.

[0072] In this embodiment, the zero-gravity support 41 has a circular hole 411, which is located on the extension line of the collapse guide groove 410 and is not connected to the collapse guide groove 410. A collapse energy-absorbing structure 43 is formed between the circular hole 411 and the collapse guide groove 410. The collapse energy-absorbing structure 43 has a strength weakening notch 430 on the side near the collapse guide groove 410. In actual use, when a collision occurs in a zero-gravity posture, the hinge 420 impacts the collapse energy-absorbing structure 43, and the collapse energy-absorbing structure 43 can break at the strength weakening notch 430, and the hinge 420 slides into the collapse guide groove 410.

[0073] In this solution, the collision energy is absorbed by the collapsible energy-absorbing structure 43, and the seat returns to a normal sitting posture, which can effectively reduce the injury to the occupants. Moreover, its overall structure is simple and low in cost.

Claims

1. A collapsible, zero-gravity seat, characterized in that, include: Base; The seat is movably mounted on the base; The backrest is rotatably mounted on the seat. A zero-gravity adjustment mechanism, disposed between the base and the seat, includes a lead screw motor, a zero-gravity support, and an upper connecting rod. The zero-gravity support is rotatably mounted on the base and has a collapse guide groove and a collapse energy-absorbing structure. The collapse energy-absorbing structure is located at one end near the collapse guide groove. The upper end of the upper connecting rod is rotatably connected to the seat, and the lower end of the upper connecting rod is rotatably connected to the zero-gravity support and moves against the collapse energy-absorbing structure. One end of the lead screw motor is a motor mounting end, and the other end is a telescopic end. One of the motor mounting end and the telescopic end is rotatably connected to the base, and the other is rotatably connected to the zero-gravity support. In a normal sitting posture, the direction of the force exerted by the lower end of the upper connecting rod on the zero-gravity support is perpendicular or nearly perpendicular to the collapsible guide groove.

2. The collapsible zero-gravity seat according to claim 1, characterized in that, In zero-gravity posture, the direction of the force exerted by the lower end of the upper connecting rod on the zero-gravity support is collinear or nearly collinear with the collapsible guide groove; When a collision occurs in a zero-gravity state, the lower end of the upper link impacts the collapsible energy-absorbing structure and slides along the collapsible guide groove to the end of the collapsible guide groove away from the collapsible energy-absorbing structure. The collapsible energy-absorbing structure collapses to absorb the collision energy, and the seat returns to a normal sitting posture.

3. The collapsible zero-gravity seat according to claim 2, characterized in that, The lower end of the upper connecting rod is provided with a hinge, and the upper connecting rod is rotatably connected to the zero gravity support through the hinge, and the hinge is in motion opposed to the collapsible energy-absorbing structure. When a collision occurs in a zero-gravity state, the hinge breaks through the collapsible energy-absorbing structure and slides into the collapsible guide groove.

4. The collapsible zero-gravity seat according to claim 3, characterized in that, The collapsible energy-absorbing structure is configured as a collapsible sheet; The collapsible plate includes a fixing part, a connecting part, and a limiting ring. The connecting part is connected between the fixing part and the limiting ring, and the connecting part is provided with a plurality of strength weakening grooves. The fixing part is fixedly connected to the zero gravity support, and the hinge is inserted through the limiting ring. When a collision occurs in a zero-gravity state, the hinge impacts the limiting ring, which can break the connecting part and cause it to slide into the collapsible guide groove.

5. The collapsible zero-gravity seat according to claim 4, characterized in that, The fixing part is arranged along the circumference of the limiting ring, and the angle between the line connecting the center of the limiting ring and one end of the fixing part and the line connecting the limiting ring and the other end of the fixing part is greater than 90 degrees.

6. The collapsible zero-gravity seat according to claim 4, characterized in that, The connecting portion is provided with a plurality of strength weakening grooves spaced apart.

7. The collapsible zero-gravity seat according to claim 3, characterized in that, The zero-gravity support is provided with a circular hole, which is located on the extension line of the collapse guide groove and is not connected to the collapse guide groove. The collapse energy absorption structure is formed between the circular hole and the collapse guide groove. The collapsible energy-absorbing structure has a strength-weakening notch on the side near the collapsible guide groove; When a collision occurs in a zero-gravity state, the hinge impacts the collapsible energy-absorbing structure, which may break at the strength-weakening notch, and the hinge slides into the collapsible guide groove.

8. The collapsible zero-gravity seat according to claim 3, characterized in that, The hinge has a cylindrical surface and is hinged to the zero-gravity support through the cylindrical surface. The diameter of the cylindrical surface is greater than the width of the collapsible guide groove.

9. The collapsible zero-gravity seat according to claim 1, 2, or 3, characterized in that, The zero-gravity support is provided with a limiting notch, and the base is provided with a square tube; When a collision occurs in a zero-gravity state, the lower end of the upper connecting rod impacts the collapsible energy-absorbing structure and slides along the collapsible guide groove to the end of the collapsible guide groove away from the collapsible energy-absorbing structure; the front end of the seat descends, the seat returns to a normal sitting posture, and the two side walls of the square tube abut against the two side walls of the limiting notch, and the limiting notch limits the seat.

10. The collapsible zero-gravity seat according to claim 1, characterized in that, The lead screw motor includes a motor body, an output lead screw on the motor body, a telescopic sleeve fitted on the output lead screw, and the telescopic sleeve being threadedly connected to the output lead screw; The motor mounting end is located on the motor body, and the telescopic end is located on the telescopic rod sleeve.

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