Trigger and zero-gravity seat

Abstract

The embodiment of the invention provides a trigger and a zero-gravity seat, the trigger comprises a shell, a piston and a gas generator, and the piston comprises a mounting part accommodated in the shell and a fixing rod extending out of the shell; the fixing rod can move between a first position for locking the first component and the second component and a second position for unlocking the first component and the second component, and the gas generator is configured to push the piston to enable the fixing rod to move from the first position to the second position or from the second position to the first position after being actuated; the gas generator is fixed at one end of the mounting part, the gas outlet end faces the fixing rod, a circulating hole is formed in the mounting part, and a sealed cavity is formed between the gas outlet end and the shell. In a normal state, the fixing rod is located at the first position, the seat backrest is in a locking state, when a vehicle collides, the gas generator is ignited, the piston is pushed to enable the fixing rod to move to the second position, and the seat backrest rotates to a normal sitting posture along with the upper half body of a human body under the action of inertia force.

Description

Technical Field

[0001] This specification relates to the technical field of vehicle safety, and specifically relates to a trigger and a zero-gravity seat. Background Art

[0002] A zero-gravity seat is an automotive seat that optimizes ergonomic design by simulating the weightless state in space, aiming to relieve body pressure to the greatest extent and improve riding comfort. During the use of a zero-gravity seat, the reclining angle of a person is larger than that of a normal seat. When a vehicle collision occurs, the current passive safety protection effect is insufficient. Due to the excessive reclining angle of the occupant, problems such as seat belt strangulation of the neck and excessive spinal force injury values may occur. Summary of the Invention

[0003] In view of this, the embodiments of this specification provide a trigger and a zero-gravity seat. In the normal state, the seat backrest is in a locked state. When a vehicle collision occurs, the trigger is unlocked, and under the action of inertia, the seat backrest rotates with the upper body of the human body to a normal sitting position, relieving the problem of seat belt strangulation of the neck during the collision process and reducing the spinal force injury value to a certain extent.

[0004] The embodiments of this specification provide the following technical solution: A trigger includes a housing, a piston, and a gas generator. The piston includes a mounting portion received in the housing and a fixing rod extending outside the housing. The fixing rod is movable between a first position that locks a first component and a second component and a second position that unlocks the first component and the second component. The gas generator is configured to, after actuation, push the piston to move the fixing rod from the first position to the second position or from the second position to the first position.

[0005] The mounting portion is a hollow tubular structure, the maximum diameter of which is larger than the maximum width of the fixing rod. The gas generator is fixed to one end of the mounting portion, and its gas outlet end faces the direction of the fixing rod. The mounting portion is provided with a circulation hole, and a sealed cavity is formed between the gas outlet end and the housing.

[0006] Preferably, the mounting portion includes a mounting section fixed to the gas generator and a transition section connecting the fixing rod. The transition section is conical, and the circulation hole is provided on the transition section.

[0007] Preferably, the central axis of the circulation hole is consistent with the normal direction of the position where the circulation hole is located on the transition section.

[0008] Preferably, the housing is provided with a first through hole for the fixing rod to pass through. A first sealing ring and a guide frame are arranged between the first through hole and the fixing rod. The first sealing ring is arranged close to the mounting portion, and the guide frame is an elastic and variable-diameter ring-shaped component.

[0009] Preferably, the guide frame is formed by alternately arranged convex portions and concave portions, the outer wall of the convex portion abuts against the inner wall of the first through hole, and the inner wall of the concave portion abuts against the outer wall of the fixed rod.

[0010] Preferably, an installation sleeve is further arranged in the housing, at least part of the installation sleeve is installed in an interference fit between the housing and the installation portion, a first step portion is formed in the housing, and when the fixed rod is in the first position, the installation sleeve axially abuts against the first step portion.

[0011] Preferably, an elastic pressure ring is arranged in the installation sleeve, at least part of the elastic pressure ring is installed in an interference fit between the installation sleeve and the gas generator to limit the gas generator from jumping relative to the installation sleeve, a second step portion is formed on the inner wall of the installation sleeve, the first side of the elastic pressure ring abuts against the protruding portion of the gas generator, and the second side of the elastic pressure ring abuts against the second step portion to limit the gas generator from axially sliding relative to the installation sleeve.

[0012] Preferably, a second sealing ring is further arranged in the housing, an embedding groove is formed on the installation sleeve, at least part of the second sealing ring is embedded in the embedding groove, and the second sealing ring abuts against the inner wall of the housing.

[0013] Preferably, a sealing sleeve is arranged between the gas generator and the installation portion, the sealing sleeve is sleeved outside the gas generator, the inner wall of the sealing sleeve abuts against the outer wall of the gas generator, and the outer wall of the sealing sleeve abuts against the inner wall of the installation portion.

[0014] Preferably, at least part of the fixed rod is a solid hard rod, and when the fixed rod is in the first position, the solid hard rod at least penetrates through the housing.

[0015] Preferably, the housing includes a front cover and a rear cover that cooperate with each other, the front cover and the rear cover cooperate to form a cylindrical chamber, an installation plate extends outward from the outer wall of the front cover, a plurality of reinforcing ribs are arranged between the installation plate and the front cover, an installation hole is formed on the installation plate, and the installation plate is installed on the first component through an installation bolt passing through the installation hole.

[0016] A zero-gravity seat includes a seat cushion skeleton, a backrest skeleton, and a trigger as described in any one of the above, the trigger is installed on the seat cushion skeleton or the backrest skeleton, when the fixed rod is in the first position, the backrest skeleton is fixed relative to the seat cushion skeleton or pivots within a small range, and when the fixed rod is in the second position, the seat cushion skeleton can rotate relative to the backrest skeleton or pivot within a large range.

[0017] Compared with the prior art, the beneficial effects that can be achieved by at least one of the above technical solutions adopted in the embodiments of this specification at least include:

[0018] In the normal state, the fixed rod is in the first position where the first component and the second component are locked, and the seat back is in the locked state. When a vehicle collision occurs, the trigger receives a collision signal, the gas generator detonates, and the piston is pushed to move the fixed rod to the second position where the first component and the second component are unlocked. Under the action of inertia, the seat back rotates with the upper body of the human body to the normal sitting position, avoiding the seat belt from tightening around the occupant's neck, and at the same time reducing the force on the spine to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is an exploded structural schematic diagram of the trigger provided by the present application;

[0021] Figure 2 It is a structural schematic diagram of the trigger provided by the present application when the fixed rod is in the first position;

[0022] Figure 3 It is a structural schematic diagram of the trigger provided by the present application when the fixed rod is in the second position;

[0023] Figure 4 It is a structural schematic diagram of the zero-gravity seat provided by the present application from the first perspective;

[0024] Figure 5 It is a structural schematic diagram of the zero-gravity seat provided by the present application from the second perspective.

[0025] In the figure, 1. backrest frame; 2. seat cushion frame; 201. locking hole; 3. trigger; 301. front cover; 302. rear cover; 303. mounting part; 304. transition section; 305. fixed rod; 3051. solid rigid rod; 306. gas generator; 307. external controller; 308. control wire harness; 309. mounting plate; 310. reinforcing rib; 311. mounting bolt; 312. guide frame; 313. first sealing ring; 314. circulation hole; 315. elastic pressing ring; 316. mounting sleeve; 317. groove; 318. second sealing ring; 319. sealing sleeve; 320. second step part; 321. first through hole; 322. second through hole; 323. first step part; 4. side plate; 5. second step bolt; 6. first step bolt; 7. arc-shaped groove; 8. rotating shaft. Detailed implementation manners

[0026] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0027] The following uses specific specific examples to illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts belong to the scope of protection of the present application.

[0028] It should be noted that the following describes various aspects of the embodiments within the scope of the appended claims. It should be obvious that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is illustrative only. Based on the present application, those skilled in the art should understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects described herein can be used to implement the device and / or practice the method. In addition, this device and / or this method can be implemented using other structures and / or functions in addition to one or more of the aspects described herein.

[0029] It should also be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present application in a schematic manner. The drawings only show the components related to the present application, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0030] In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0031] The following will describe the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.

[0032] As Figures 1-3As shown in the figure, the embodiments of this specification provide the following technical solution: A trigger, comprising a housing, a piston, and a gas generator 306. The piston includes a mounting portion 303 accommodated in the housing and a fixing rod 305 extending outside the housing. The fixing rod 305 is movable between a first position for locking a first component and a second component and a second position for unlocking the first component and the second component. When the fixing rod 305 is in the first position, the first component and the second component are locked and cannot move relative to each other. When the fixing rod 305 is in the second position, the first component and the second component are unlocked and can move relative to each other. The gas generator 306 is configured to, after actuation, push the piston to move the fixing rod 305 from the first position to the second position or from the second position to the first position. Depending on the initial position of the fixing rod 305, after the gas generator 306 detonates, it pushes the piston to move the fixing rod 305 between the first position and the second position. If the initial position of the fixing rod 305 is in the first position, it pushes the piston to move the fixing rod 305 from the first position to the second position. If the initial position of the fixing rod 305 is in the second position, it pushes the piston to move the fixing rod 305 from the second position to the first position;

[0033] The mounting portion 303 is a hollow tubular structure, and the maximum diameter thereof is larger than the maximum width of the fixing rod 305. The maximum diameter of the mounting portion 303 is larger than the maximum width of the fixing rod 305, which can prevent the mounting portion 303 from passing through the hole at the position where the fixing rod 305 passes through the housing, so that the mounting portion 303 is always inside the housing. The gas generator 306 is fixed to one end of the mounting portion 303, and its gas outlet end faces the direction of the fixing rod 305. A flow hole 314 is provided on the mounting portion 303. A sealed cavity is formed between the gas outlet end and the housing, ensuring that the gas generated by the gas generator 306 can only flow into the sealed cavity, thereby ensuring that the gas pushes the piston to move.

[0034] It should be noted that the fixing rod 305 is movable between a first position for locking a first component and a second component and a second position for unlocking the first component and the second component. The specific process is as follows:

[0035] When the initial position of the fixing rod 305 is in the first position: When the gas generator 306 detonates, the gas generated by the gas generator 306 flows into the sealed cavity through the flow hole 314. As the gas increases, the pressure in the sealed cavity increases. Under the action of the gas pressure, the mounting portion 303 of the piston moves in the housing, and the fixing rod 305 moves synchronously with the mounting portion 303, causing the fixing rod 305 to move from the first position to the second position, unlocking the first component and the second component, and enabling the first component and the second component to move relative to each other;

[0036] When the fixing rod 305 is initially in the second position: its movement principle is similar to the above movement, except that the fixing rod 305 moves from the second position to the first position, thereby locking the first component and the second component, so that the first component and the second component are relatively fixed.

[0037] It should be noted that the locking state in this scheme cannot be understood as a completely mechanically fixed state. It should be understood that when the fixing rod is in the first position, the relative movement stroke between the first component and the second component is limited, including mechanical fixation limitation and small-stroke movement limitation, etc.; when it is in the second position, the above-mentioned limitation is contacted.

[0038] like Figures 1-3 As shown, in some embodiments, the mounting portion 303 includes a mounting section fixed to the gas generator 306 and a transition section 304 connected to the fixing rod 305, the transition section 304 is tapered, and the flow hole 314 is provided on the transition section 304. The mounting section is a hollow tubular structure, so that the gas generator 306 can be installed inside the mounting section. Since the outer diameter of the mounting section is larger than the outer diameter of the fixing rod 305, the mounting section and the fixing rod 305 are connected through the tapered transition section 304. The interior of the transition section 304 is also a hollow structure and is connected to the mounting section. The flow hole 314 is provided on the transition section 304. The gas generated by the gas generator 306 first enters the transition section 304 and then flows into the shell through the flow hole 314.

[0039] It should be noted that the installation section, the transition section 304 and the fixing rod 305 can be manufactured in an integrally formed manner.

[0040] like Figures 1-3 As shown, in some embodiments, the central axis of the flow hole 314 is consistent with the normal direction of the flow hole 314 at the position of the transition section 304. When the gas generated by the gas generator 306 enters the shell through the flow hole 314, since the flow hole 314 is vertically opened on the transition section 304 and the transition section 304 is conical, the gas can be uniformly sprayed along the normal direction of the cone surface, forming a swirl effect similar to a gas distributor, avoiding local airflow concentration, so that the piston is more evenly thrust by the gas. At the same time, the vertical opening structure has a large free cross-sectional area, and with the gradual expansion characteristics of the conical transition section 304, the gas flow resistance can be reduced, so that the gas thrust on the piston is greater, which is convenient for pushing the piston to move in the shell.

[0041] like Figures 1-3As shown, in some embodiments, a first through hole 321 for the fixing rod 305 to pass through is formed in the housing. A first sealing ring 313 and a guide frame 312 are arranged between the first through hole 321 and the fixing rod 305. The first sealing ring 313 is arranged close to the mounting portion 303. The guide frame 312 is an elastic and variable-diameter ring-shaped component. The first sealing ring 313 and the guide frame 312 are arranged in the first through hole 321 formed in the housing. The fixing rod 305 extends to the outside of the housing through the first sealing ring 313 and the guide frame 312 in sequence. The first sealing ring 313 is sleeved outside the fixing rod 305. There is a sealed contact between the inner wall of the first sealing ring 313 and the outer wall of the fixing rod 305, and there is a sealed contact between the outer wall of the first sealing ring 313 and the first through hole 321, which can ensure the sealing performance between the fixing rod 305 and the first through hole 321 and avoid gas leakage from the first through hole 321. The guide frame 312 is arranged outside the sealing ring. By adopting the strategy of ensuring sealing first and then guiding, the guide frame 312 guides the direction of the fixing rod 305 to ensure that the fixing rod 305 can only move along a specific direction. At the same time, the guide frame 312 is an elastic and variable-diameter ring-shaped component, which adapts to the change of the radial clearance between the fixing rod 305 and the first through hole 321 through elastic deformation, effectively compensates for the dimensional fluctuations caused by vibration or other reasons, and the elastic material can absorb high-frequency vibration energy and reduce the structure-borne noise.

[0042] As Figures 1-3 shown, in some embodiments, the guide frame 312 is formed by alternately distributed convex portions and concave portions. The outer wall of the convex portion abuts against the inner wall of the first through hole 321, and the inner wall of the concave portion abuts against the outer wall of the fixing rod 305. The contact between the convex portion and the first through hole 321 forms an outer support ring, and the contact between the concave portion and the fixing rod 305 constitutes an inner constraint ring. The circumferential uniform distribution of the load is realized through the alternating distribution of the convex portion and the concave portion, reducing the single-point contact stress. When the concave portion is compressed, it transfers elastic deformation to the convex portion, and can maintain a constant contact pressure within a certain range.

[0043] As Figures 1-3As shown, in some embodiments, an installation sleeve 316 is further provided inside the housing. The installation sleeve 316 is at least partially press-fitted between the housing and the installation portion 303. A first stepped portion 323 is formed inside the housing. When the fixing rod 305 is in the first position, the installation sleeve 316 axially abuts against the first stepped portion 323. By forming the first stepped portion 323 in the housing, during installation, the installation sleeve 316 moves synchronously with the piston inside the housing. When the installation sleeve 316 moves to contact the first stepped portion 323, the installation sleeve 316 can no longer continue to slide. At this time, the fixing rod 305 moves to the first position, indicating that the installation is in place. By providing the installation sleeve 316, when the installation portion 303 needs to move relative to the housing, it is necessary to overcome the friction between the installation sleeve 316 and the inner wall of the housing. Due to the interference fit between the installation sleeve 316 and the housing and the installation portion 303, if it is necessary to make the installation sleeve 316 slide relative to the housing, a relatively large force is required to push. Therefore, it can be ensured that the installation sleeve 316 will not displace relative to the housing under normal conditions (i.e., when the gas generator 306 is not detonated), that is, it can be ensured that the gas generator 306 will not move inside the housing.

[0044] As Figures 1-3 shown, in some embodiments, an elastic pressure ring 315 is provided inside the installation sleeve 316. The elastic pressure ring 315 is at least partially press-fitted between the installation sleeve 316 and the gas generator 306 to limit the jumping of the gas generator 306 relative to the installation sleeve 316. A second stepped portion 320 is formed on the inner wall of the installation sleeve 316. The first side of the elastic pressure ring 315 abuts against the protruding portion of the gas generator 306, and the second side of the elastic pressure ring 315 abuts against the second stepped portion 320 to limit the axial sliding of the gas generator 306 relative to the installation sleeve 316. The elastic pressure ring 315 is sleeved on the tail of the gas generator 306. The inner wall of the elastic pressure ring 315 is closely attached to the outer wall of the gas generator 306, and the outer wall of the elastic pressure ring 315 is closely attached to the inner wall of the installation sleeve 316, which can prevent the tail of the gas generator 306 from jumping relative to the installation sleeve 316. A second stepped portion 320 is formed inside the installation sleeve 316. The first side of the elastic pressure ring 315 abuts against the stepped portion, and the second side abuts against the protruding portion of the gas generator 306 and the side wall of the installation section, which can prevent the elastic pressure ring 315 from axially sliding relative to the gas generator 306 or the installation sleeve 316.

[0045] As Figures 1-3As shown, in some embodiments, a second sealing ring 318 is further provided inside the housing. An embedding groove 317 is formed on the mounting sleeve 316. At least a part of the second sealing ring 318 is embedded in the embedding groove 317, and the second sealing ring 318 abuts against the inner wall of the housing. By providing the second sealing ring 318 between the housing and the mounting sleeve 316, the sealing performance between the mounting sleeve 316 and the housing is ensured. Meanwhile, an annular embedding groove 317 is formed on the mounting sleeve 316, and at least a part of the second sealing ring 318 is embedded in the embedding groove 317, which is convenient for the installation of the second sealing ring 318 and ensures that the second sealing ring 318 will not slide relative to the mounting sleeve 316, thus achieving a better sealing effect.

[0046] As Figures 1-3 As shown, in some embodiments, a sealing sleeve 319 is provided between the gas generator 306 and the mounting portion 303. The sealing sleeve 319 is sleeved outside the gas generator 306. The inner wall of the sealing sleeve 319 abuts against the outer wall of the gas generator 306, and the outer wall of the sealing sleeve 319 abuts against the inner wall of the mounting portion 303. By sleeving and installing the sealing sleeve 319 outside the gas generator 306, the sealing between the gas generator 306 and the mounting portion 303 is ensured, so that the gas generated at the gas outlet end of the gas generator 306 can only enter the sealed cavity, and the leakage of gas between the gas generator 306 and the mounting portion 303 can be avoided.

[0047] As Figures 1-3 As shown, in some embodiments, at least a part of the fixing rod 305 is a solid hard rod 3051. When the fixing rod 305 is in the first position, the solid hard rod 3051 at least passes through the housing. The fixing rod 305 is a solid hard rod 3051, which has high load-bearing capacity and strength, can withstand a large impact force, and can prevent the fixing rod 305 from deforming.

[0048] As Figures 1-3As shown, in some embodiments, the housing includes a front cover 301 and a rear cover 302 that cooperate with each other. The front cover 301 and the rear cover 302 cooperate with each other to form a cylindrical chamber. An installation plate 309 extends outward from the outer wall of the front cover 301. A plurality of reinforcing ribs 310 are provided between the installation plate 309 and the front cover 301 to ensure the strength between the installation plate 309 and the front cover 301. Installation holes are formed in the installation plate 309, and the installation plate 309 is installed on the first component through installation bolts 311 passing through the installation holes. The housing is composed of the front cover 301 and the rear cover 302 that cooperate with each other. Cylindrical cavities are formed in both the front cover 301 and the rear cover 302. The front cover 301 is fixedly connected with an installation plate 309, and the installation plate 309 is installed on the first component through installation screws, so as to realize the connection between the trigger and the first component. A first through hole 321 is formed in the front cover 301, so that the fixing rod 305 can pass through the first through hole 321 to cooperate with the first component.

[0049] It should be noted that a second through hole 322 is formed in the rear cover 302, and the control wire harness 308 of the gas generator 306 passes through the second through hole 322 and is connected to an external controller 307; wherein, the external controller 307 is configured to control the gas generator 306 to explode when receiving a collision signal. By forming the second through hole 322 in the rear cover 302, it is convenient for the control wire harness 308 of the gas generator 306 to be connected to the external controller 307, and whether the gas generator 306 explodes is controlled by the external controller 307, so as to control the unlocking or locking of the first component and the second component.

[0050] It should also be noted that the front cover 301 and the rear cover 302 can be connected by means of snap connection, threaded connection, etc., and can be selected according to the actual situation.

[0051] Please refer to Figures 1-5 , based on the same inventive concept, an embodiment of this specification provides a zero-gravity seat, including a seat cushion frame, a backrest frame, and a trigger 3 as described in any one of the above. The trigger 3 is installed on the seat cushion frame or the backrest frame. When the fixing rod 305 is in the first position, the backrest frame is fixed relative to the seat cushion frame or pivots within a small range. When the fixing rod 305 is in the second position, the backrest frame can pivot relative to the seat cushion frame within a large range.

[0052] In implementation, the first component is the seat cushion frame 2, and the second component is the backrest frame 1. The backrest frame 1 is pivotally connected to the seat cushion frame 2 through a side plate 4 fixedly connected thereto. That is, the side plate 4 and the seat cushion frame 2 are connected by a first stepped bolt 6 and a second stepped bolt 5. An arc-shaped groove 7 centered on the first stepped bolt 6 is formed on the side plate 4, and the second stepped bolt 5 passes through the arc-shaped groove 7. The trigger 3 is installed on the seat cushion frame 2. A locking hole 201 is also provided on the seat cushion frame 2. When the fixed rod 305 is in the first position, it passes through the arc-shaped groove 7 and the locking hole 201, allowing the backrest frame 1 and the seat cushion frame 2 to pivot within the arc length of the arc-shaped groove 7. When the fixed rod 305 is in the second position, it withdraws from the arc-shaped groove 7 and the locking hole 201, allowing the backrest frame 1 and the seat cushion frame 2 to pivot within a stroke greater than the arc length of the arc-shaped groove 7.

[0053] It should be noted that when the length of the arc-shaped groove 7 is the same as the width of the fixed rod 305, it means that the backrest frame 1 and the seat cushion frame 2 are fixed.

[0054] It should also be noted that in other embodiments, a fixing hole corresponding to the locking hole 201 can also be formed on the side plate 4. The size of the fixing hole is slightly larger than or equal to the outer diameter of the fixed rod 305. When the fixed rod 305 is in the first position, the fixed rod 305 passes through the fixing hole and the locking hole 201 to achieve mechanical locking and fixing between the seat cushion frame 2 and the backrest frame 1.

[0055] For the same or similar parts among the various embodiments in this specification, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for the method embodiments described later, since they correspond to the system, the description is relatively simple, and reference can be made to the relevant parts of the system embodiments for the relevant parts.

[0056] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A trigger, comprising a housing, a piston, and a gas generator (306). The piston includes a mounting portion (303) received in the housing and a fixing rod (305) extending outside the housing. The fixing rod (305) is movable between a first position for locking a first component to a second component and a second position for unlocking the first component from the second component. The gas generator (306) is configured to, after actuation, push the piston to move the fixing rod (305) from the first position to the second position or from the second position to the first position. It is characterized in that, the mounting portion (303) is a hollow tubular structure, the maximum diameter of which is greater than the maximum width of the fixing rod (305). The gas generator (306) is fixed to one end of the mounting portion (303), and its gas outlet end faces the direction of the fixing rod (305). A circulation hole (314) is provided on the mounting portion (303), and a sealed cavity is formed between the gas outlet end and the housing.

2. The flip-flop according to claim 1, wherein The mounting portion (303) includes a mounting section fixed to the gas generator (306) and a transition section (304) connecting the fixing rod. The transition section (304) is conical, and the circulation hole is provided on the transition section (304).

3. The flip-flop according to claim 2, wherein The central axis of the circulation hole (314) is consistent with the normal direction of the position where the circulation hole (314) is located on the transition section (304).

4. The flip-flop according to claim 1, characterized in that, A first through hole (321) for the fixing rod (305) to pass through is formed in the housing. A first sealing ring (313) and a guide frame (312) are provided between the first through hole (321) and the fixing rod. The first sealing ring (313) is disposed close to the mounting portion (303), and the guide frame (312) is an elastic and variable-diameter ring-shaped component.

5. The flip-flop according to claim 4, characterized in that, The guide frame (312) is formed by alternately distributed convex portions and concave portions in sequence. The outer wall of the convex portion abuts against the inner wall of the first through hole (321), and the inner wall of the concave portion abuts against the outer wall of the fixing rod (305).

6. The flip-flop according to any one of claims 1-5, characterized in that, An installation sleeve (316) is further provided in the housing. The installation sleeve (316) is at least partially press-fitted between the housing and the mounting portion (303). A first stepped portion (323) is formed in the housing. When the fixing rod (305) is in the first position, the installation sleeve (316) axially abuts against the first stepped portion (323).

7. The flip-flop according to claim 6, characterized in that, An elastic compression ring (315) is arranged inside the mounting sleeve (316). At least part of the elastic compression ring (315) is press-fitted between the mounting sleeve (316) and the gas generator (306) to limit the jumping of the gas generator (306) relative to the mounting sleeve (316). A second step portion (320) is formed on the inner wall of the mounting sleeve (316). The first side of the elastic compression ring (315) abuts against the protruding part of the gas generator (306), and the second side of the elastic compression ring (315) abuts against the second step portion (320) to limit the axial sliding of the gas generator (306) relative to the mounting sleeve (316).

8. The flip-flop according to claim 6, characterized in that A second sealing ring (318) is further arranged inside the housing. A groove (317) is formed on the mounting sleeve (316). At least part of the second sealing ring (318) is embedded in the groove (317), and the second sealing ring (318) abuts against the inner wall of the housing.

9. The flip-flop according to claim 1, characterized in that, A sealing sleeve (319) is arranged between the gas generator (306) and the mounting portion (303). The sealing sleeve (319) is sleeved outside the gas generator (306). The inner wall of the sealing sleeve (319) abuts against the outer wall of the gas generator (306), and the outer wall of the sealing sleeve (319) abuts against the inner wall of the mounting portion (303).

10. The flip-flop according to claim 1, characterized in that, The fixing rod (305) is at least partially a solid rigid rod (3051). When the fixing rod (305) is in the first position, the solid rigid rod (3051) at least passes through the housing.

11. The flip-flop according to claim 1, characterized in that, The housing includes a front cover (301) and a rear cover (302) which are matched with each other. The front cover (301) and the rear cover (302) cooperate to form a cylindrical chamber. An installation plate (309) extends outward from the outer wall of the front cover (301). A plurality of reinforcing ribs (310) are arranged between the installation plate (309) and the front cover (301). Installation holes are formed in the installation plate (309). The installation plate (309) is installed on the first component through the installation bolts (311) passing through the installation holes.

12. A zero-gravity seat, characterized in that, It includes a seat cushion frame, a backrest frame and a trigger (3) according to any one of claims 1-11. The trigger (3) is installed on the seat cushion frame or the backrest frame. When the fixing rod (305) is in the first position, the backrest frame is fixed relative to the seat cushion frame or pivots within a small range. When the fixing rod (305) is in the second position, the backrest frame can rotate relative to the seat cushion frame or pivot within a large range.

Images