Zero-gravity cushion with quick return structure

Abstract

The utility model discloses a zero-gravity cushion with a quick return structure, which comprises the quick return structure arranged below a seat frame skeleton, and the quick return structure comprises a locking component and an unlocking component which are arranged on any one of the left side and the right side of the rear end of the seat frame skeleton. The locking assembly is used for ensuring that the seat frame framework can be subjected to zero-gravity adjustment in a normal state, and the unlocking assembly is used for unlocking the locking assembly to enable the seat frame framework to rapidly return under the action of gravity after the seat frame framework in the zero-gravity state collides with the front of an automobile. A quick return structure is arranged at the rear end of the seat frame framework, so that the seat frame framework can quickly return after being collided forwards when being in a zero-gravity posture, the restraint capability on a passenger is improved, and the impact on the passenger is absorbed, so that the injury to the passenger is reduced; the whole quick return structure is arranged on any one of the left side and the right side of the rear end of the seat frame skeleton, the structure is simplified, the position below the front end of the seat frame skeleton is not occupied, and arrangement of parts at the front end of the seat frame skeleton is not affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle seats, and particularly relates to a zero-gravity cushion with a quick return structure. Background Technique

[0002] At present, in order to improve the comfort of seats, a zero-gravity adjustment mechanism is provided in most vehicle seats to enable zero-gravity adjustment of the seats. Since the restraint on the occupant is less in the zero-gravity posture, when the vehicle is involved in a frontal collision, the occupant sitting on the seat in the zero-gravity state is prone to being injured.

[0003] Chinese Patent CN117565761A discloses a cushion quick return mechanism for a zero-gravity seat. A cushion quick return mechanism for quickly returning the cushion frame is installed on the front angle adjustment mechanism. Through the cushion quick return mechanism, when a collision occurs at the zero-gravity posture position of the seat, the cushion can quickly return, improving the restraint protection for the occupant and reducing the injury caused by the collision. To ensure the overall quick return of the cushion, the entire device not only needs to be arranged on the left and right sides below the cushion, so that two sets of cushion quick return mechanisms are required, with a complex structure, but also is arranged at the front end of the cushion frame, which is not convenient for arranging the front-end components of the cushion (such as seat leg rests, etc.). Summary of the Utility Model

[0004] The utility model intends to propose a zero-gravity cushion with a quick return structure, which has a simple structure, does not occupy the position below the front end of the cushion, and does not affect the arrangement of the front-end components of the cushion.

[0005] For this reason, the technical solution adopted by the utility model is as follows: a zero-gravity cushion with a quick return structure, including a quick return structure arranged below the seat frame skeleton. The lower end of the seat frame skeleton is arranged on the fixed component through the seat frame skeleton. The link component can realize the zero-gravity adjustment of the seat frame skeleton. A driving component for driving the link component to work and adopting a linear movement structure is arranged between the fixed component and the link component; the quick return structure includes a locking component and an unlocking component arranged on either the left or right side at the rear end of the seat frame skeleton. The locking component is used to ensure that the seat frame skeleton can perform zero-gravity adjustment in the normal state, and the unlocking component is used to unlock the locking component for the seat frame skeleton in the zero-gravity state after a frontal collision of the vehicle, so that the seat frame skeleton can quickly return under the action of gravity.

[0006] As a preference in the above solution, the locking assembly includes a locking rotating member rotatably arranged on the fixed assembly and a pressing block hinged on the fixed assembly and used to prevent the locking rotating member from rotating. One end of the driving assembly is hinged on the locking rotating member. A pressing shortage groove is arranged on the side of the locking rotating member away from the driving assembly. A pressing protrusion capable of cooperating with the pressing shortage groove is arranged on the pressing block. An anti-rotation spring is arranged between the locking rotating member and the pressing block. The connection point between the anti-rotation spring and the pressing block and the pressing protrusion are respectively located on both sides of the hinge point of the pressing block. The connection point between the anti-rotation spring and the locking rotating member and the pressing shortage groove are respectively located on both sides of the locking rotating member. The unlocking assembly is arranged on the side of the pressing block away from the pressing protrusion.

[0007] Further preferably, the locking rotating member includes a rotating member arranged on the fixed assembly through an energy absorption member and a locking member hinged on the fixed assembly. One end of the driving assembly is hinged on the rotating member. A locking ratchet is arranged on the side of the rotating member away from the driving assembly. A pawl capable of inserting into the locking ratchet is arranged on the locking member. The pressing shortage groove and the anti-rotation spring are both arranged on the locking member.

[0008] Further preferably, the energy absorption member includes a fixed end used for connecting with the fixed assembly and a rotating end used for connecting with the locking member.

[0009] Further preferably, the unlocking assembly includes a detonator arranged on the fixed assembly. An unlocking cable is arranged between the detonator and the locking assembly. When a frontal collision occurs to the vehicle, the detonator can be detonated, and then the locking assembly is pulled through the unlocking cable to achieve unlocking.

[0010] Further preferably, two sets of link assemblies are arranged at intervals left and right. Each set includes a front link and a lower link. The upper end of the front link is hinged to the front end of the seat frame skeleton. The lower end of the front link is hinged to the lower link. The other end of the lower link is hinged to the fixed assembly. One end of the driving assembly is hinged to any one of the lower links. The hinge point between the driving assembly and the lower link, the hinge point between the lower link and the front link, and the hinge point between the lower link and the fixed assembly do not coincide. The rear end of the seat frame skeleton is hinged to the fixed assembly.

[0011] Further preferably, a front cross tube is arranged between the two lower links and used to ensure the synchronous movement of the link assemblies located at the front end of the seat frame skeleton.

[0012] Advantages of the present utility model: A quick return structure is provided at the rear end of the seat frame skeleton, enabling it to quickly return after a frontal collision when the seat frame skeleton is in a zero-gravity posture, improving the restraint ability for the occupant and absorbing the impact received by the occupant, that is, the seat frame skeleton absorbs energy synchronously during the return process, thereby reducing the injury suffered by the occupant; the entire quick return structure is provided on either the left or right side at the rear end of the seat frame skeleton. As long as the quick return structure is provided on one side, it can meet the quick return of the seat frame skeleton after a frontal collision, thus simplifying the structure. At the same time, being provided at the rear end of the seat frame skeleton does not occupy the position below the front end of the seat frame skeleton and does not affect the layout of the components at the front end of the seat frame skeleton. Brief Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the present utility model.

[0014] Figure 2 It is an exploded view of the present utility model.

[0015] Figure 3 It is a structural schematic diagram of the present utility model.

[0016] Figure 4 It is a schematic diagram of the present utility model when in the zero-gravity position.

[0017] Figure 5 It is a structural schematic diagram of the present utility model when in the zero-gravity position.

[0018] Figure 6 It is a structural schematic diagram of the present utility model when the locking pin withdraws after a frontal collision when in the zero-gravity position.

[0019] Figure 7 It is a structural schematic diagram of the present utility model when the protection component functions after a frontal collision when in the zero-gravity position.

[0020] Figure 8 It is a schematic diagram of the quick return structure in the present utility model Figure 1 (not collided frontally).

[0021] Figure 9 It is a schematic diagram of the quick return structure in the present utility model Figure 2 (after frontal collision).

[0022] Figure 10 It is a schematic diagram of the energy absorption component in the present utility model.

[0023] Reference numerals: anti-tightening groove - a, anti-tightening protrusion - b, seat frame skeleton - 100, locking assembly - 200, locking rotating member - 210, energy-absorbing member - 211, fixed end - 211a, rotating end - 211b, rotating member - 212, locking ratchet - 212a, locking member - 213, pawl - 213a, anti-tightening block - 220, anti-rotation spring - 230, unlocking assembly - 300, detonator - 310, unlocking cable - 320, link assembly - 400, front link - 410, lower link - 420, front cross tube - 440, fixing assembly - 500, driving assembly - 600. Detailed implementation mode

[0024] The present utility model will be further described below through embodiments in conjunction with the drawings:

[0025] As Figures 1-10 shown, a zero-gravity seat cushion with a quick return structure mainly consists of a quick return structure, a seat frame skeleton 100, a link assembly 400, a fixing assembly 500 and a driving assembly 600. Among them, the quick return structure is arranged below the seat frame skeleton 100, the lower end of the seat frame skeleton 100 is arranged on the fixing assembly 500 through the link assembly 400, and the link assembly 400 can realize the zero-gravity adjustment of the seat frame skeleton 100. A driving assembly 600 for driving the link assembly 400 to work is arranged between the fixing assembly 500 and the link assembly 400. The driving assembly 600 adopts a linear movement structure, such as a motor screw assembly, a linear guide rail, etc. The fixing assembly can be arranged on a structure such as a slide rail assembly or a rotating assembly according to needs, so that the seat also has functions such as forward and backward movement or rotation.

[0026] The quick return structure mainly consists of a locking assembly 200 and an unlocking assembly 300, and both the locking assembly 200 and the unlocking assembly 300 are arranged on either the left or right side of the rear end of the seat frame skeleton 100. Among them, the locking assembly 200 is used to ensure that the seat frame skeleton can perform zero-gravity adjustment in the normal state, and the unlocking assembly 300 is used to unlock the locking assembly for the seat frame skeleton in the zero-gravity state so that the seat frame skeleton can quickly return under the action of gravity after a frontal collision of the vehicle.

[0027] The locking assembly 200 includes a locking rotating member 210 rotatably arranged on the fixing assembly 500 and a pressing block 220 hingedly arranged on the fixing assembly 500 and used to prevent the locking rotating member 210 from rotating, and one end of the driving assembly 600 is hinged on the locking rotating member 210. In order to prevent the locking rotating member from rotating under normal conditions, a pressing groove a is arranged on the locking rotating member 210 on the side away from the driving assembly, and a pressing protrusion b that can cooperate with the pressing groove a is arranged on the pressing block 220. At the same time, an anti-rotation spring 230 is arranged between the locking rotating member 210 and the pressing block 220, and the connection point between the anti-rotation spring and the pressing block and the pressing protrusion are respectively located on both sides of the hinge point of the pressing block, and the connection point between the anti-rotation spring and the locking rotating member and the pressing groove are respectively located on both sides of the locking rotating member. The unlocking assembly 300 is arranged on the side of the pressing block 220 away from the pressing protrusion b. The cooperation between the abutting groove and the abutting block can prevent the locking rotating part from rotating.

[0028] The locking rotating member includes a rotating member 212 disposed on the fixed assembly 500 through an energy absorbing member 211 and a locking member 213 hinged on the fixed assembly 500, and one end of the driving assembly 600 is hinged on the rotating member 212, a locking ratchet 212a is disposed on the side of the rotating member 212 away from the driving assembly 600, a ratchet 213a that can be inserted into the locking ratchet 212a is disposed on the locking member 213, and the tightening groove a and the anti-rotation spring 230 are both disposed on the locking member 213. That is, the locking rotating member adopts a ratchet mechanism, and of course, the locking rotating member can also adopt a one-way clearance motion mechanism such as a grooved wheel mechanism.

[0029] Preferably, the energy absorbing member is a friction disk, and the energy absorbing member 211 includes a fixed end 211a for connecting to the fixed assembly 500 and a rotating end 211b for connecting to the locking member, and the rotation of the rotating end drives the internal friction plate to rotate, thereby achieving friction energy absorption.

[0030] When the seat frame is not hit from the front, the locking protrusion is pressed against the locking groove and the ratchet mechanism has a one-way locking property, so that the locking rotating member cannot rotate. At this time, the locking rotating member is fixedly connected to the fixed assembly, so that the zero gravity adjustment function of the connecting rod assembly and the driving assembly can be achieved. At this time, the state of the seat frame is Figure 3 and Figure 5 As shown, Figure 3 This is a simplified diagram of the structure when zero gravity adjustment is not performed. Figure 5 This is a simplified diagram of the structure in zero gravity.

[0031] When the seat frame is hit from the front in a zero gravity state, the abutment block can rotate under the action of the unlocking assembly, and the abutment protrusion leaves the abutment groove, thereby releasing the restriction on the locking rotation assembly. At this time, the state of the seat frame is as follows: Figure 6As shown in the structural schematic diagram, due to the non-operation of the driving component and the one-way movement function of the ratchet mechanism, the ratchet can rotate unidirectionally under the action of gravity, thereby realizing the return of the seat frame skeleton. At this time, the state of the seat frame skeleton is as Figure 7 shown in the structural schematic diagram, thereby improving the restraint force on the occupant and reducing the injury suffered by the occupant.

[0032] To enable the locking projection to leave the locking groove after the front collision of the seat frame skeleton, so that the locking rotating member can rotate. The unlocking assembly 300 includes an initiator 310 provided on the fixed assembly 500. An unlocking cable 320 is provided between the initiator 310 and the locking assembly 200, and the other end of the unlocking cable is provided on the abutting block. When a vehicle has a front collision, the initiator 310 can be detonated, and then the abutting block is pulled to rotate through the unlocking cable 320, so that the locking projection leaves the locking groove, thereby enabling the locking rotating member to rotate, that is, the rotating member can rotate together with the locking member. Among them, the initiator is a prior art.

[0033] The specific structure of the link assembly 400 includes two groups arranged at intervals left and right. Each group includes a front link 410 and a lower link 420. The upper end of the front link 410 is hinged to the front end of the seat frame skeleton 100, the lower end of the front link 410 is hinged to the lower link, and the other end of the lower link 420 is hinged to the fixed assembly 500. One end of the driving assembly 600 is hinged to any one of the lower links 420, and the hinge points between the driving assembly 600 and the lower link 420, between the lower link 420 and the front link 410, and between the lower link 420 and the fixed assembly 500 do not coincide. The rear end of the seat frame skeleton 100 is hinged to the fixed assembly 500.

[0034] At the same time, a front cross tube 440 for ensuring the synchronous movement of the link assembly at the front end of the seat frame skeleton is provided between the two lower links 420. At this time, the lower links are fixed to the front cross tube. To reduce the number of components, the front cross tube can be rotatably provided at the lower end of the front link, or the front cross tube can be rotatably provided on the fixed assembly.

[0035] In this embodiment, the fixed assembly is provided on the slide rail assembly. The fixed assembly specifically includes two front fixing members and two rear fixing members arranged opposite to each other left and right. The protection assembly is provided on the rear fixing member on the same side as the driving assembly. The lower link is hinged to the front fixing assembly. Of course, the front fixing member and the rear fixing member on each side can also be provided as a single component extending forward and backward.

Claims

1. A zero-gravity seat cushion with a quick return structure, comprising a quick return structure arranged below a seat frame frame (100), wherein the lower end of the seat frame frame (100) is arranged on a fixing assembly (500) via a connecting rod assembly (400), and a driving assembly (600) for driving the connecting rod assembly (400) to work and adopting a linear movement structure is arranged between the fixing assembly (500) and the connecting rod assembly (400), characterized in that: The quick return structure comprises a locking assembly (200) and an unlocking assembly (300) arranged on either left or right side of the rear end of the seat frame frame (100); the locking assembly (200) is used to ensure that the seat frame frame can be adjusted to zero gravity in a normal state; the unlocking assembly (300) is used to unlock the locking assembly of the seat frame frame in a zero gravity state after a frontal collision with a vehicle, so that the seat frame frame can quickly return to its original position under the action of gravity.

2. The zero-gravity seat cushion with a quick return structure according to claim 1, characterized in that: The locking assembly (200) comprises a locking rotating member (210) rotatably arranged on the fixing assembly (500) and a pressing block (220) hingedly arranged on the fixing assembly (500) and used to prevent the locking rotating member (210) from rotating. One end of the driving assembly (600) is hingedly connected to the locking rotating member (210). A pressing groove (a) is arranged on the locking rotating member (210) on a side away from the driving assembly. The pressing block (220) is provided with a locking groove (a). A locking protrusion (b) capable of cooperating with the locking groove (a), an anti-rotation spring (230) is arranged between the locking rotating member (210) and the locking block (220), and the connection point between the anti-rotation spring and the locking block and the locking protrusion are respectively located on both sides of the hinge point of the locking block, the connection point between the anti-rotation spring and the locking rotating member and the locking groove are respectively located on both sides of the locking rotating member, and the unlocking component (300) is arranged on a side of the locking block (220) away from the locking protrusion (b).

3. The zero-gravity seat cushion with a quick return structure according to claim 2, characterized in that: The locking rotating member (210) comprises a rotating member (212) arranged on the fixed component (500) via an energy absorbing member (211) and a locking member (213) hinged on the fixed component (500); one end of the driving component (600) is hinged on the rotating member (212); a locking ratchet (212a) is arranged on a side of the rotating member (212) away from the driving component (600); a ratchet (213a) capable of being inserted into the locking ratchet (212a) is arranged on the locking member (213); and the tightening groove (a) and the anti-rotation spring (230) are both arranged on the locking member (213).

4. The zero-gravity seat cushion with a quick return structure according to claim 3, characterized in that: The energy absorbing member (211) comprises a fixed end (211a) for connecting to a fixed assembly and a rotating end (211b) for connecting to a locking member.

5. The zero-gravity seat cushion with a quick return structure according to claim 1 or 2, characterized in that: The unlocking assembly (300) comprises a detonator (310) arranged on the fixing assembly (500), and an unlocking pull wire (320) is arranged between the detonator (310) and the locking assembly (200). When a frontal collision occurs in the automobile, the detonator (310) can be detonated, and then the locking assembly (200) is pulled by the unlocking pull wire (320) to achieve unlocking.

6. The zero-gravity seat cushion with a quick return structure according to claim 1 or 2, characterized in that: The connecting rod assembly (400) includes two groups spaced apart on the left and right, each group including a front connecting rod (410) and a lower connecting rod (420), the upper end of the front connecting rod (410) is hinged to the front end of the seat frame frame (100), the lower end of the front connecting rod (410) is hinged to the lower connecting rod, the other end of the lower connecting rod (420) is hinged to the fixed assembly (500), one end of the driving assembly (600) is hinged to any lower connecting rod (420), and the hinge point between the driving assembly (600) and the lower connecting rod (420), the hinge point between the lower connecting rod (420) and the front connecting rod (410), and the hinge point between the lower connecting rod (420) and the fixed assembly (500) do not overlap, and the rear end of the seat frame frame (100) is hinged to the fixed assembly (500).

7. The zero-gravity seat cushion with a quick return structure according to claim 6, characterized in that: A front transverse tube (440) is arranged between the two lower connecting rods (420) to ensure synchronous movement of the connecting rod assembly located at the front end of the seat frame frame.

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