Zero-gravity cushion capable of returning and absorbing energy after front collision

Abstract

The utility model discloses a zero-gravity seat cushion capable of returning and absorbing energy after a front collision, which comprises a seat frame skeleton, a fixing component, a connecting rod component, a driving component and a passive safety structure, wherein the passive safety structure is capable of unlocking and returning the seat cushion and absorbing collision energy after the front collision of a vehicle occurs; the passive safety structure is arranged between the hinge point of the connecting rod assembly and the fixing assembly and the hinge point of the seat frame framework and the fixing assembly, one end of the driving assembly is hinged to the connecting rod assembly, and the other end of the driving assembly is hinged to the passive safety structure. The whole passive safety structure is arranged between the driving assembly and the fixing assembly, only one passive safety structure is arranged, the structure is simplified, the passive safety structure is further arranged between the hinge point of the connecting rod assembly and the fixing assembly and the hinge point of the seat frame framework and the fixing assembly, the positions below the front end and the rear end of the cushion cannot be occupied, arrangement of parts at the front end of the cushion is not affected, and the safety of the cushion is improved. Foot space for passengers in the back row can be reserved conveniently, and meanwhile the overall height of the seat can be reduced conveniently.

Description

Technical Field

[0001] This utility model belongs to the field of automotive seat technology, specifically relating to a zero-gravity seat cushion that can return to its original position after a frontal collision and absorb energy. Background Technology

[0002] Zero-gravity seat cushions typically consist of a seat frame, a fixing component, a linkage assembly, and a drive assembly. Specifically, the rear end of the seat frame is hinged to the rear end of the fixing component, and the front end is hinged to the front end of the fixing component via the linkage assembly. One end of the drive assembly is mounted on the linkage assembly, and the other end is mounted on the fixing component. Movement of the drive assembly lifts the front end of the seat frame, thus achieving zero-gravity adjustment of the seat cushion. Because occupants experience less restraint in a zero-gravity posture, they are more susceptible to injury in the event of a car crash.

[0003] To protect occupants, a return structure is installed to allow the seat cushion to return to its original position when the car is hit. For example, Chinese patent CN117565761A discloses a seat cushion quick return mechanism based on a zero-gravity seat. Although it can achieve quick return of the entire seat cushion, the entire device not only needs to be set on the left and right sides under the seat cushion, requiring two sets of seat cushion quick return mechanisms, which is complex, but it is also located at the front of the seat cushion frame, which is inconvenient for the arrangement of front seat cushion components (such as seat leg rests). Utility Model Content

[0004] This utility model proposes a zero-gravity seat cushion that can return to its original position after a frontal impact and absorb energy. It has a simple structure and can quickly return to its original position after being hit by a frontal impact. At the same time, it does not occupy the space under the front and rear of the seat cushion. It not only does not affect the arrangement of the front part of the seat cushion, but also makes it easier to leave legroom for rear passengers.

[0005] Therefore, the technical solution adopted by this utility model is as follows: a zero-gravity seat cushion that can return to its original position and absorb energy after a frontal collision, including a seat frame, a fixing component, a linkage component, a drive component, and a passive safety structure that allows the seat cushion to unlock and return to its original position and absorb collision energy after a frontal collision. The rear end of the seat frame is hinged to the rear end of the fixing component, and the front end of the seat frame is hinged to the front end of the fixing component through the linkage component. The passive safety structure is disposed between the hinge point of the linkage component and the fixing component and the hinge point of the seat frame and the fixing component. One end of the drive component is hinged to the linkage component, and the other end is hinged to the passive safety structure.

[0006] As a preferred embodiment of the above scheme, the passive safety structure includes an energy-absorbing rotating assembly and a detonator pin-type locking assembly disposed on the fixed assembly. The energy-absorbing rotating assembly includes a rotating plate rotatably disposed on the fixed assembly. One end of the driving assembly is hinged to the rotating plate. The detonator pin-type locking assembly is disposed on the fixed assembly. The rotating plate is provided with a locking hole for the detonator pin-type locking assembly to be inserted and locked.

[0007] In a further preferred embodiment, the detonator pin-type locking assembly is located on the outside of the seat frame skeleton, and the fixing assembly is provided with a sleeve for the pin to pass through at the position corresponding to the locking hole.

[0008] More preferably, the rotating moving plate is disposed on the rotating energy-absorbing component, the rotating energy-absorbing component includes a fixed end and a rotating end that can rotate relative to the fixed end, the fixed end is used to connect with the fixed component, and the rotating end is used to connect with the rotating moving plate.

[0009] Preferably, the locking hole and the hinge point between the drive assembly and the rotating plate are both located on the same side of the mounting point of the rotating plate and the fixed assembly.

[0010] Further preferably, the detonator pin-type locking assembly includes a housing that can be mounted on a fixed assembly, a sealed cavity is provided inside the housing, a piston is slidably disposed inside the sealed cavity, one end of the pin extends into the sealed cavity and is connected to the piston, and a reaction chamber is provided inside the housing that communicates with the side of the sealed cavity near the fixed assembly, and the reaction chamber is filled with a reactant that can react after an impact, causing the pressure inside the reaction chamber to increase.

[0011] The beneficial effects of this utility model are as follows: A passive safety structure is provided between the hinge point of the linkage assembly and the fixed assembly and the hinge point of the seat frame and the fixed assembly, which enables the seat frame to quickly return to its original position after being impacted when it is in a zero-gravity posture, thereby improving the restraint of the occupants and absorbing the impact on the occupants. That is, the seat frame absorbs energy synchronously during the return process, thereby reducing the injury to the occupants. The entire passive safety structure is set between the drive assembly and the fixed assembly, and only one is set. This not only simplifies the structure, but also, since it is set between the hinge point of the linkage assembly and the fixed assembly and the hinge point of the seat frame and the fixed assembly, it does not occupy the space under the front and rear of the seat cushion. This not only does not affect the arrangement of the front part of the seat cushion, but also makes it easier to leave legroom for rear passengers, and also makes it easier to lower the overall height of the seat. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the present utility model. Figure 1 .

[0013] Figure 2 This is a schematic diagram of the present utility model. Figure 2.

[0014] Figure 3 This is a simplified structural diagram of the present invention.

[0015] Figure 4 This is an exploded view of the present invention.

[0016] Figure 5 This is a schematic diagram of the present invention when the front end is raised upwards.

[0017] Figure 6 This is a simplified structural diagram of the present invention when the front end is raised upwards.

[0018] Figure 7 This is a simplified structural diagram of the present invention after the pin retracts when the front end is lifted upwards and subjected to an impact.

[0019] Figure 8 This is a simplified structural diagram of the present invention after the protective component is activated when the front end is lifted upwards and subjected to an impact.

[0020] Figure 9 This is a schematic diagram of the pin-type locking assembly of the detonator in this utility model. Figure 1 (Not hit).

[0021] Figure 10 This is a schematic diagram of the pin-type locking assembly of the detonator in this utility model. Figure 2 (After the impact).

[0022] Figure 11 This is a schematic diagram of the rotating energy-absorbing component in this utility model.

[0023] Reference numerals: Seat frame skeleton-100, Linkage assembly-400, Front link-410, Lower link-420, Front cross tube-440, Fixing assembly-500, Sleeve-510, Drive assembly-600, Passive safety structure-700, Energy-absorbing rotating assembly-710, Rotating moving plate-711, Locking hole-711a, Rotating energy-absorbing component-712, Fixed end-712a, Rotating end-712b, Detonator pin-type locking assembly-720, Pin-721, Housing-722. Detailed Implementation

[0024] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0025] like Figures 1-11As shown, a zero-gravity seat cushion capable of returning to its original position and absorbing energy after a frontal collision mainly comprises a seat frame 100, a linkage assembly 400, a fixing assembly 500, a drive assembly 600, and a passive safety structure 700. The rear end of the seat frame 100 is hinged to the rear end of the fixing assembly 500, and the front end of the seat frame 100 is hinged to the front end of the fixing assembly 500 via the linkage assembly 400. The passive safety structure 700 is positioned between the hinge point of the linkage assembly 400 and the fixing assembly 500 and the hinge point of the seat frame 100 and the fixing assembly 500. One end of the drive assembly 600 is hinged to the linkage assembly 400, and the other end is hinged to the passive safety structure 700. The passive safety structure allows the seat cushion to unlock and return to its original position and absorb collision energy after a frontal collision. The drive assembly 600 employs a linear motion structure, such as a motor lead screw assembly. The fixing assembly can be mounted on a slide rail assembly or a rotating assembly as needed, enabling the seat to also have forward / backward movement or rotation functions.

[0026] The passive safety structure 700 specifically includes an energy-absorbing rotating assembly 710 and a detonator pin-type locking assembly 720 disposed on the fixed assembly 500. The energy-absorbing rotating assembly 710 includes a rotating plate 711 rotatably mounted on the fixed assembly 500. One end of the drive assembly 600 is hinged to the rotating plate 711. The detonator pin-type locking assembly 720 is disposed on the fixed assembly 500. The rotating plate 711 has a locking hole 711a for the insertion and locking of the pin 721 within the detonator pin-type locking assembly 720. When no forward collision occurs, the pin of the detonator pin-type locking assembly is inserted into the locking hole, preventing the rotating plate from rotating and fixing it to the fixed assembly. When a forward collision occurs, the pin of the detonator pin-type locking assembly disengages from the locking hole, allowing the rotating plate to rotate relative to the fixed assembly.

[0027] Ideally, the detonator pin-type locking assembly 720 is located on the outside of the seat frame frame, and a sleeve 510 for the pin 721 to pass through is provided on the fixing assembly at the position corresponding to the locking hole 711a, which facilitates the arrangement of other components below the seat frame.

[0028] To achieve the rotation of the rotating plate relative to the fixed assembly, the rotating plate 711 is mounted on the rotating energy-absorbing component 712. The rotating energy-absorbing component 712 includes a fixed end 712a and a rotating end 712b that can rotate relative to the fixed end. The fixed end 712a is used to connect to the fixed assembly 500, and the rotating end 712b is used to connect to the rotating plate. Preferably, the rotating energy-absorbing component 712 is configured as a friction disc. The rotation of the rotating end drives the internal friction plates to rotate, converting collision energy into heat energy, thereby further achieving the energy absorption function.

[0029] Ideally, the locking hole 711a and the hinge point between the drive assembly 600 and the rotating plate 711 are both located on the same side of the mounting point of the rotating plate 711 and the fixing assembly 500. This makes it easier to reduce the size of the rotating plate and thus prevent the rotating plate from interfering with the rear hinge point of the seat frame and the fixing assembly.

[0030] To enable the pin to retract from the locking hole after a frontal impact, the detonator pin-type locking assembly 720 includes a housing 722 that can be mounted on the fixing assembly 500. A sealing cavity is provided within the housing 722, and a piston is slidably disposed within the sealing cavity. One end of the pin 721 extends into the sealing cavity and connects to the piston. Simultaneously, a reaction chamber is provided within the housing 722, communicating with the side of the sealing cavity closest to the fixing assembly. The reaction chamber is filled with a reactant that reacts upon impact, increasing the pressure within the reaction chamber. This reactant can be the substance used in airbags. When the car is involved in a frontal impact, the seat is also impacted, causing the reactant in the reaction chamber to react, resulting in increased pressure in the reaction chamber and the sealing cavity communicating with it. This increased pressure acts on the side of the piston that connects to the pin, thus pushing the pin back.

[0031] When no frontal collision occurs, the passive safety structure is fixed to the fixed component. At this time, one end of the drive component is essentially hinged directly to the fixed component, and the other end is hinged to the passive safety structure. When the drive component operates, it can lift the front end of the seat frame upwards through the linkage assembly, thereby achieving a zero-gravity posture for the seat cushion. The state of the seat frame at this time... Figure 4 and Figure 6 As shown, where Figure 4 This is a simplified structural diagram without zero-gravity adjustment. Figure 6 This is a simplified structural diagram under zero gravity conditions. When a frontal collision occurs, the passive safety structure unlocks under the impact; the seat frame frame's state at this time is as follows. Figure 7 As shown in the simplified structural diagram, the passive safety structure can rotate relative to the fixed component. Specifically, a transmission structure is provided between one end of the drive component and the fixed component. Therefore, when the drive component is in the locked state, the seat frame will return to its original position under gravity. At this time, the state of the seat frame is as follows: Figure 8 As shown in the simplified structural diagram, this design enhances the restraint on occupants and reduces the risk of injury.

[0032] The specific structure of the linkage assembly 400 includes two sets arranged at left and right intervals. Each set includes a front linkage 410 and a lower linkage 420. The upper end of the front linkage 410 is hinged to the front end of the seat frame 100, and the lower end of the front linkage 410 is hinged to the lower linkage. The other end of the lower linkage 420 is hinged to the fixed assembly 500. One end of the drive assembly 600 is hinged to any of the lower linkages 420. The hinge points between the drive assembly 600 and the lower linkage 420, between the lower linkage 420 and the front linkage 410, and between the lower linkage 420 and the fixed assembly 500 are all non-coincident.

[0033] Meanwhile, a front horizontal tube 440 is provided between the two lower connecting rods 420 to ensure synchronous movement of the connecting rod assembly at the front end of the seat frame. At this time, the lower connecting rods are fixed to the front horizontal tube. To reduce the number of parts, the front horizontal tube can be rotatably set at the lower end of the front connecting rod, or the front horizontal tube can be rotatably set on the fixed assembly.

[0034] In this embodiment, the fixing component is set on the slide rail assembly. The fixing component specifically includes two fixing members arranged opposite each other on the left and right. The passive safety structure is set on the fixing member on the same side as the drive assembly. In order to facilitate the setting of the fixing member, the fixing member includes a base plate. On the base plate, there are upright plates that facilitate hinged installation at the rear hinge point of the seat frame and the front hinge point of the connecting rod assembly. At the same time, a connecting plate is set between the two upright plates. The passive safety structure is set on the connecting plate.

Claims

1. A zero-gravity seat cushion capable of returning to its original position after a frontal impact and absorbing energy, comprising a seat frame (100), a fixing component (500), a linkage assembly (400), and a drive assembly (600), wherein the rear end of the seat frame (100) is hinged to the rear end of the fixing component (500), and the front end of the seat frame (100) is hinged to the front end of the fixing component (500) via the linkage assembly (400), characterized in that: It also includes a passive safety structure (700) that allows the seat cushion to unlock and return to its original position and absorb collision energy after a frontal collision of the vehicle. The passive safety structure (700) is disposed between the hinge point of the linkage assembly (400) and the fixed assembly (500) and the hinge point of the seat frame frame (100) and the fixed assembly (500). One end of the drive assembly (600) is hinged to the linkage assembly (400) and the other end is hinged to the passive safety structure (700).

2. The zero-gravity seat cushion with forward impact recovery and energy absorption as described in claim 1, characterized in that: The passive safety structure (700) includes an energy-absorbing rotating assembly (710) and a detonator pin-type locking assembly (720) disposed on a fixed assembly (500). The energy-absorbing rotating assembly (710) includes a rotating plate (711) rotatably disposed on the fixed assembly (500). One end of the driving assembly (600) is hinged to the rotating plate (711). The detonator pin-type locking assembly (720) is disposed on the fixed assembly (500). The rotating plate (711) is provided with a locking hole (711a) for locking after the pin (721) inside the detonator pin-type locking assembly (720) is inserted.

3. The zero-gravity seat cushion capable of returning to its original position after a frontal impact and absorbing energy as described in claim 2, characterized in that: The detonator pin-type locking assembly (720) is located on the outside of the seat frame skeleton, and the fixing assembly (500) is provided with a sleeve for the pin (721) to pass through at the position corresponding to the locking hole (711a).

4. The zero-gravity seat cushion capable of returning to its original position after a frontal impact and absorbing energy as described in claim 2, characterized in that: The rotating moving plate (711) is disposed on the rotating energy absorbing member (712). The rotating energy absorbing member (712) includes a fixed end (712a) and a rotating end (712b) that can rotate relative to the fixed end. The fixed end (712a) is used to connect with the fixed assembly (500), and the rotating end (712b) is used to connect with the rotating moving plate.

5. The zero-gravity seat cushion capable of returning to its original position after a frontal impact and absorbing energy as described in claim 2, characterized in that: The locking hole (711a) and the hinge point between the drive assembly (600) and the rotating plate (711) are both located on the same side of the mounting point of the rotating plate (711) and the fixing assembly (500).

6. The zero-gravity seat cushion with forward impact recovery and energy absorption as described in claim 3, characterized in that: The detonator pin-type locking assembly (720) includes a housing (722) that can be mounted on a fixed assembly (500). A sealing cavity is provided inside the housing (722), and a piston is slidably disposed inside the sealing cavity. One end of the pin (721) extends into the sealing cavity and is connected to the piston. A reaction chamber is provided inside the housing (722) that communicates with the side of the sealing cavity near the fixed assembly. The reaction chamber is filled with a reactant that can react after an impact, causing the pressure inside the reaction chamber to increase.

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