Rear lifting structure for realizing linkage of seat and backrest of automobile seat

Abstract

The invention relates to the technical field of automobile seat functions, in particular to an automobile seat backrest linkage rear lifting structure which comprises a symmetrical supporting transmission mechanism, a seat frame assembly, a linkage force transmission assembly, an elastic return part, a backrest frame assembly, a power synchronous driving assembly and a step screw. The symmetrical supporting transmission mechanisms are symmetrically arranged on the left and right sides of the seat; the left side and the right side of the seat frame assembly are hinged to the corresponding portions of the symmetrical supporting transmission mechanisms respectively, and the rear end of the seat frame assembly is hinged to the lower end of the linkage force transmission assembly. The elastic return piece is assembled at the hinge joint of the symmetrical support transmission mechanism and the front end of the seat frame assembly; the backrest frame assembly is vertically arranged at the rear end of the seat frame assembly, and the lower portion of the backrest frame assembly is hinged to the upper end of the linkage force transmission assembly. According to the invention, the symmetrical supporting transmission mechanism, the linkage force transmission assembly, the elastic return piece, the power synchronous driving assembly and the step screw are arranged, so that real-time cooperation of backrest adjustment and cushion lifting is realized.

Description

Technical Field

[0001] This invention application relates to the field of automotive seat function technology, specifically to a structure that enables the lifting of an automotive seat after it is linked to the seat and backrest. Background Technology

[0002] As the automotive consumer market continues to upgrade its demand for ride comfort, the multi-functional adjustability of car seats has become one of the core indicators for enhancing product competitiveness. In resting situations, occupants often need to recline the car seat back to a near-flat position. However, existing car seats often have relatively independent adjustment structures for the seat cushion and backrest. When the backrest is reclined, a significant difference in height can easily form between the rear end of the seat cushion and the bottom of the backrest. This difference can cause the occupant's lower back to be unsupported or rigidly pushed up when lying down, failing to form a continuous, conforming support surface. This not only reduces ride comfort but may also cause fatigue due to uneven body pressure. Summary of the Invention

[0003] To address the aforementioned issues, a structure is provided that enables the lifting of a car seat in conjunction with the backrest adjustment. By incorporating a symmetrical support transmission mechanism, a linkage force transmission component, an elastic return component, a power synchronization drive component, and a step screw, real-time coordination between backrest adjustment and seat cushion lifting is achieved.

[0004] To address the problems of existing technologies, this invention provides a structure for lifting a car seat after it is moved back and forth, comprising a symmetrical support transmission mechanism, a seat frame assembly, a linkage force transmission component, an elastic return component, a backrest frame assembly, a power synchronization drive component, and stepped screws. The symmetrical support transmission mechanism is symmetrically arranged on the left and right sides of the seat and fixed to the vehicle body via a slide rail assembly. The seat frame assembly is horizontally arranged above the symmetrical support transmission mechanism, with its left and right sides respectively hinged to corresponding parts of the symmetrical support transmission mechanism via stepped bolts, and the rear end of the seat frame assembly is hinged to the lower end of the linkage force transmission component via stepped bolts. The elastic return component is assembled at the hinge connection between the symmetrical support transmission mechanism and the front end of the seat frame assembly, and is sleeved on the outside of the corresponding stepped bolt. The backrest frame assembly is vertically arranged at the rear end of the seat frame assembly, with its lower part fixedly connected to the power synchronization drive component, and the lower part of the backrest frame assembly is hinged to the upper end of the linkage force transmission component via stepped screws.

[0005] Preferably, the power synchronization drive assembly includes a power output component and a synchronization transmission component; the power output component is fixed to one side of the backrest frame assembly and is connected to the synchronization transmission component in a transmission manner; the synchronization transmission component extends laterally through the lower part of the backrest frame assembly.

[0006] Preferably, the linkage force transmission component includes a connecting rod A. The upper end of the connecting rod A is rotatably connected to the lower part of the backrest frame assembly via the stepped screw, and the lower end of the connecting rod A is hinged to the connecting lug at the rear end of the seat frame assembly via the stepped bolt. The connecting rod A is used to transmit the upward force required to lift the seat frame assembly.

[0007] Preferably, the elastic return component is a return torsion spring, which is sleeved on the stepped bolt at the hinge point between the front end of the seat frame assembly and the symmetrical support transmission mechanism. One end of the return torsion spring is engaged with the symmetrical support transmission mechanism, and the other end abuts against the seat frame assembly, providing an elastic driving force for the return of the seat frame assembly.

[0008] Preferably, a sliding groove is provided on the hinge seat at the lower part of the backrest frame assembly, and the stepped screw passes through the sliding groove and is hinged to the upper end of the linkage force transmission component. When the backrest frame assembly is adjusted forward, the stepped screw slides along the sliding groove and does not exert an upward or downward force on the linkage force transmission component.

[0009] Preferably, the groove is arc-shaped, and the arc trajectory is centered on the rotation center of the synchronous transmission component.

[0010] Preferably, the symmetrical support transmission mechanism includes two symmetrically arranged support seats, a front link assembly, and a rear link; the two support seats are respectively located on the left and right sides of the seat; the front link assembly and the rear link are laterally connected between the two support seats, and the seat frame assembly is hinged to the front link assembly and the rear link.

[0011] Preferably, the two support seats of the symmetrical support transmission mechanism are arranged in a mirror symmetrical manner to provide a symmetrical mounting reference surface for the seat frame assembly, and the force points of the seat frame assembly are symmetrically distributed along the central axis of the seat to ensure that the seat frame assembly is subjected to balanced forces and moves synchronously.

[0012] Preferably, the front end of the seat frame assembly is hinged to the front side of the symmetrical support transmission mechanism, and the rear end is connected to the backrest frame assembly through the linkage force transmission component. The seat frame assembly and the symmetrical support transmission mechanism together form a four-bar linkage mechanism.

[0013] Preferably, the mounting interfaces of each component of the lifting structure are compatible with the existing automotive seat frame motion mechanism, allowing the backrest frame assembly, the power synchronous drive component, and the symmetrical support transmission mechanism to be directly integrated into the existing seat assembly system without altering the original seat main structure.

[0014] The advantages of this invention application compared to the prior art are:

[0015] 1. This invention application includes a symmetrical support transmission mechanism, a linkage force transmission component, an elastic return component, a power synchronous drive component, and a stepped screw. The symmetrical support transmission mechanism is fixed to the vehicle body via a slide rail assembly, providing a stable installation foundation for the overall structure. After the power synchronous drive component is activated, it drives the backrest frame assembly to rotate backward. The backrest frame assembly pulls the upper end of the linkage force transmission component to move synchronously backward and upward via the stepped screw. The lower end of the linkage force transmission component rotates upward around the hinge point with the seat frame assembly, pushing the rear end of the seat frame assembly to rise around the hinge point with the symmetrical support transmission mechanism. At this time, the front end of the seat frame assembly compresses the elastic return component to store force. When the backrest frame assembly returns to its forward position, the elastic return component releases its elastic force, pushing the front end of the seat frame assembly to rotate downward, causing the entire seat frame assembly to sink and reset. The linkage force transmission component moves downward with the rear end of the seat frame assembly, pulling the stepped screw to reset along the slide groove of the backrest frame assembly. Through the positional layout and hinge connection between the various components, a highly efficient linkage transmission system is constructed, thereby realizing real-time coordination between backrest adjustment and seat cushion lifting.

[0016] 2. This invention application provides a power output component and a synchronous transmission component. After the power output component is started, it outputs torque to drive the synchronous transmission component to rotate around its own axis. The synchronous transmission component passes through the lower part of the backrest frame assembly laterally, driving the backrest frame assembly as a whole to achieve angle adjustment around the rotation center of the synchronous transmission component, thereby avoiding problems such as jamming and displacement caused by unilateral adjustment lag and uneven force.

[0017] 3. This invention application provides a connecting rod A. When the backrest frame assembly rotates backward, its lower hinge seat drives the upper end of connecting rod A to swing backward and upward through the stepped screw. Connecting rod A, using itself as a rigid force transmission carrier, efficiently converts the rotational kinetic energy of the backrest frame assembly into an upward thrust. Through the hinge point of the connecting ear plate of the lower end and the seat frame assembly, it acts on the rear end of the seat frame assembly, pushing the seat frame assembly to rise around the front hinge point. When the backrest returns to its original position, the rear end of the seat frame assembly sinks, and the connecting ear plate pulls the lower end of connecting rod A downward, so that the upper end of connecting rod A returns to its original position along the slide groove with the stepped screw. The connection relationship between the two ends of connecting rod A and the backrest frame assembly and the seat frame assembly forms a power transmission path between the backrest frame assembly and the seat frame assembly, thereby realizing the directional transmission of power and effectively reducing the dispersion and loss of force during the transmission process. Attached Figure Description

[0018] Figure 1 This invention application discloses a three-dimensional structure for realizing a lifting structure that links the seat back to the driver's seat. Figure 1 .

[0019] Figure 2 This invention application discloses a three-dimensional structure for realizing a lifting structure that links the seat back to the driver's seat. Figure 2 .

[0020] Figure 3This invention application relates to a left-side view of a structure that implements a linkage between the seat back and lifting mechanism for automobile seats. Figure 1 .

[0021] Figure 4 This invention application relates to a left-side view of a structure that implements a linkage between the seat back and lifting mechanism for automobile seats. Figure 2 .

[0022] Figure 5 This invention application discloses a three-dimensional structure for realizing a lifting structure that links the seat back to the driver's seat. Figure 3 .

[0023] Figure 6 This is a perspective view of a power synchronous drive component in a structure that realizes the linkage between the seat and the lifting mechanism of an automobile seat according to this invention application.

[0024] Figure 7 This is a perspective view of the connecting rod and step screw in a lifting structure that realizes the linkage between the seat back and the driver's seat in this invention application.

[0025] Figure 8 This is a perspective view of the front linkage assembly and elastic return component in a lifting structure that realizes the linkage between the seat back and the vehicle seat in this invention application.

[0026] Figure 9 This is a perspective view of the backrest frame assembly in a structure that enables the linkage between the seat and the backrest of an automobile seat to lift.

[0027] Figure 10 This is a perspective view of the seat frame assembly, support seat, and rear linkage in a structure for lifting a car seat after the backrest is linked, as described in this invention application.

[0028] The following are the labels in the diagram: 1. Symmetrical support transmission mechanism; 11. Support base; 12. Front connecting rod assembly; 13. Rear connecting rod; 2. Seat frame assembly; 3. Linkage force transmission component; 31. Connecting rod A; 4. Elastic return component; 5. Backrest frame assembly; 51. Slide groove; 6. Power synchronization drive component; 61. Power output component; 62. Synchronous transmission component; 7. Step screw. Detailed Implementation

[0029] To further understand the features, technical means, and specific objectives and functions achieved by this invention application, the invention application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figures 1 to 10The diagram illustrates a structure for lifting a car seat after retraction, comprising a symmetrical support transmission mechanism 1, a seat frame assembly 2, a linkage force transmission component 3, an elastic return component 4, a backrest frame assembly 5, a power synchronization drive component 6, and stepped screws 7. The symmetrical support transmission mechanism 1 is symmetrically arranged on the left and right sides of the seat and fixed to the vehicle body via a slide rail assembly. The seat frame assembly 2 is horizontally arranged above the symmetrical support transmission mechanism 1, with its left and right sides hinged to corresponding parts of the symmetrical support transmission mechanism 1 via stepped bolts. The rear end of the seat frame assembly 2 is hinged to the lower end of the linkage force transmission component 3 via stepped bolts. The elastic return component 4 is assembled at the hinge connection between the symmetrical support transmission mechanism 1 and the front end of the seat frame assembly 2, and is sleeved on the outside of the corresponding stepped bolt. The backrest frame assembly 5 is vertically arranged at the rear end of the seat frame assembly 2, with its lower part fixedly connected to the power synchronization drive component 6. The lower part of the backrest frame assembly 5 is hinged to the upper end of the linkage force transmission component 3 via stepped screws 7.

[0031] When the power synchronization drive component 6 drives the backrest frame assembly 5 to adjust backward, the step screw 7 drives the linkage force transmission component 3 to rotate upward, thereby pushing the rear end of the seat frame assembly 2 to rise around the hinge point with the symmetrical support transmission mechanism 1 to eliminate the step difference between the backrest and the seat cushion; when the backrest frame assembly 5 returns to its original position, the elastic return component 4 releases elastic potential energy, driving the front end of the seat frame assembly 2 to rotate downward, causing the seat frame assembly 2 to sink back to its original position.

[0032] When the occupant needs to adjust the backrest to a reclining position, the power synchronization drive component 6 starts and outputs power, driving the backrest frame assembly 5 to rotate backward. When the backrest frame assembly 5 rotates, the upper end of the linkage force transmission component 3 is pulled backward and upward through the stepped screw 7. The linkage force transmission component 3 rotates upward at its lower end with the hinge point between itself and the seat frame assembly 2 as the fulcrum and applies an upward thrust to the rear end of the seat frame assembly 2, causing the rear end of the seat frame assembly 2 to slowly rise around the hinge point with the symmetrical support transmission mechanism 1. During this process, the front end of the seat frame assembly 2 rotates upward around the hinge point, squeezing the elastic return component 4 to cause it to undergo elastic deformation and store potential energy. When the occupant needs to return the backrest to the sitting position, the power synchronous drive component 6 drives the backrest frame assembly 5 to return to its original position, and the tension of the backrest frame assembly 5 on the linkage force transmission component 3 gradually disappears; at this time, the elastic return component 4 releases the stored elastic potential energy, applies a downward thrust to the front end of the seat frame assembly 2, pushes the front end of the seat frame assembly 2 to rotate downward, and then drives the entire seat frame assembly 2 to sink and reset around the hinge point with the symmetrical support transmission mechanism 1; at the same time, the rear end of the seat frame assembly 2 moves down and pulls the lower end of the linkage force transmission component 3 to fall back synchronously, and the upper end of the linkage force transmission component 3 drives the stepped screw 7 to slide and reset along the slide groove 51 of the backrest frame assembly 5, and the entire structure returns to its initial state. By strategically positioning and connecting the various components with hinges, a highly efficient linkage transmission system is constructed, enabling real-time coordination between backrest adjustment and seat cushion lifting. When the backrest reclines, the rear end of the seat cushion rises synchronously, eliminating the step difference between the backrest and the seat cushion. This allows the occupant's body to form a continuous, supportive surface with the seat when lying down, significantly improving the comfort and safety of reclining seating.

[0033] Reference Figure 1 and Figure 6 As shown: The power synchronous drive assembly 6 includes a power output component 61 and a synchronous transmission component 62; the power output component 61 is fixed to one side of the backrest frame assembly 5 and is connected to the synchronous transmission component 62 in a transmission manner; the synchronous transmission component 62 extends laterally through the lower part of the backrest frame assembly 5.

[0034] The power output component 61 drives the synchronous transmission component 62 to rotate the backrest frame assembly 5, and at the same time, the linkage force transmission component 3 is linked to lift the seat frame assembly 2.

[0035] The power output component 61 can be a motor, and the synchronous transmission component 62 can be a synchronous shaft. The motor and the synchronous shaft are driven by gear meshing. When it is necessary to adjust the backrest angle and raise the seat cushion in conjunction, the power output component 61 starts and outputs torque, which is transmitted to the synchronous transmission component 62 through the meshing of the gears. Under the action of torque, the synchronous transmission component 62 rotates smoothly around its own axis. Since it runs horizontally through the lower part of the backrest frame assembly 5, it can drive the backrest frame assembly 5 to adjust its angle around the rotation center of the synchronous transmission component 62 when rotating. At the same time, the rotation of the backrest frame assembly 5 transmits power synchronously to the linkage transmission component 3 through the stepped screw 7 connected to the upper end of the linkage transmission component 3 at its lower part, thereby driving the linkage transmission component 3 to drive the seat frame assembly 2 to raise the rear end. The power output component 61 and the synchronous transmission component 62 achieve efficient power transmission through gear meshing. With the lateral arrangement of the synchronous transmission component 62, the power can be evenly distributed to the left and right sides of the backrest frame assembly 5, ensuring that the force on both sides of the backrest frame assembly 5 is consistent and the timing of the force is synchronized. This avoids problems such as jamming and offset caused by lag in adjustment on one side and uneven force, and significantly improves the smoothness of the backrest adjustment action and the coordination of the seat and backrest linkage.

[0036] Reference Figure 1 and Figure 7 As shown: The linkage force transmission component 3 includes a connecting rod A31. The upper end of the connecting rod A31 is rotatably connected to the lower part of the backrest frame assembly 5 through the stepped screw 7. The lower end of the connecting rod A31 is hinged to the connecting ear plate at the rear end of the seat frame assembly 2 through the stepped bolt. The connecting rod A31 is used to transmit the upward force required for the seat frame assembly 2 to be lifted.

[0037] When the power synchronization drive assembly 6 drives the backrest frame assembly 5 to rotate backward, the lower part of the backrest frame assembly 5 rotates synchronously, driving the upper end of the connecting rod A31 to swing smoothly backward and upward through the stepped screw 7. The connecting rod A31, as a rigid force transmission carrier, efficiently converts the rotational kinetic energy of the backrest frame assembly 5 into an upward thrust. This thrust is concentrated on the rear end of the seat frame assembly 2 through the hinge point between the lower end of the connecting rod A31 and the connecting ear plate. Under the action of the thrust, the seat frame assembly 2 is lifted around the hinge point between the front end and the symmetrical support transmission mechanism 1, completing the directional transmission of power from the backrest to the seat cushion. When the backrest frame assembly 5 returns to its forward position, the rear end of the seat frame assembly 2 gradually sinks under the action of the elastic return member 4, synchronously pulling the lower end of the connecting rod A31 downward through the connecting ear plate. The upper end of the connecting rod A31 rotates and resets along the stepped screw 7 with the return action of the backrest frame assembly 5, waiting for the next power transmission. The connection between the two ends of the connecting rod A31 and the backrest frame assembly 5 and the seat frame assembly 2 forms a power transmission path between the backrest frame assembly 5 and the seat frame assembly 2, thereby realizing the directional transmission of power and effectively reducing the dispersion and loss of force during the transmission process.

[0038] Reference Figure 5 and Figure 8 As shown: The elastic return component 4 is a return torsion spring. The return torsion spring is sleeved on the stepped bolt at the hinge point between the front end of the seat frame assembly 2 and the symmetrical support transmission mechanism 1. One end of the return torsion spring is engaged with the symmetrical support transmission mechanism 1, and the other end abuts against the seat frame assembly 2, providing elastic driving force for the return of the seat frame assembly 2.

[0039] When the seat-back linkage lifting action is initiated, the rear end of the seat frame assembly 2 is lifted upward under the push of the linkage force transmission component 3, causing the front end of the seat frame assembly 2 to rotate upward around the hinge point with the symmetrical support transmission mechanism 1. At this time, the front end of the seat frame assembly 2 presses against the free end of the return torsion spring, causing the torsion spring to undergo elastic deformation along the axis of the stepped bolt, while storing elastic potential energy. When the backrest frame assembly 5 returns to its forward position, its tension on the linkage force transmission component 3 gradually disappears, and the seat frame assembly 2 loses its lifting driving force. At this time, the return torsion spring releases the stored elastic potential energy, and its free end generates a reverse elastic thrust on the front end of the seat frame assembly 2, pushing the front end of the seat frame assembly 2 to rotate downward, thereby causing the entire seat frame assembly 2 to sink and reset around the hinge point, returning to its initial horizontal state. The return torsion spring, through the assembly method of snap-fit ​​and abutment, achieves energy storage and release by its own elastic deformation, and can drive the seat frame assembly 2 to automatically return to its position without the need for an additional power source.

[0040] Reference Figure 1 and Figure 9 As shown: A sliding groove 51 is provided on the hinge seat at the lower part of the backrest frame assembly 5. The stepped screw 7 passes through the sliding groove 51 and is hinged to the upper end of the linkage force transmission component 3. When the backrest frame assembly 5 is adjusted forward, the stepped screw 7 slides along the sliding groove 51 and does not exert an upward or downward force on the linkage force transmission component 3.

[0041] When the occupant needs to adjust the backrest forward, the power synchronization drive assembly 6 drives the backrest frame assembly 5 to rotate forward, and the hinge seat swings forward synchronously with the backrest frame assembly 5. At this time, the stepped screw 7 slides along the groove trajectory in the slide groove 51, and only has relative displacement with the inner wall of the slide groove 51, without generating axial or radial force. The linkage force transmission assembly 3 remains stationary under its own weight and the constraint of the seat frame assembly 2, and will not cause the seat frame assembly 2 to lift or sink. When the occupant adjusts the backrest backward to trigger the seat-back linkage lifting, the backrest frame assembly 5 drives the hinge seat to rotate backward synchronously. During the rotation of the slide groove 51 with the hinge seat, its inner wall generates a backward and upward thrust on the stepped screw 7. Under the action of the thrust, the stepped screw 7 drives the upper end of the linkage force transmission assembly 3 to move backward and upward, thereby driving the rear end of the seat frame assembly 2 to lift, completing the seat-back linkage action. By setting a slide groove 51 on the hinge seat of the backrest frame assembly 5 and using a stepped screw 7 to pass through the slide groove 51 and hinge with the linkage force transmission component 3, the forward adjustment of the backrest and the movement of the seat frame are decoupled, effectively avoiding the situation of the seat cushion being accidentally raised, and ensuring that the linkage logic is accurate and controllable.

[0042] Reference Figure 9 As shown: the slide 51 is arc-shaped, and the arc trajectory is centered on the rotation center of the synchronous transmission component 62.

[0043] When the occupant adjusts the backrest angle, the backrest frame assembly 5 rotates around the rotation center of the synchronous transmission component 62, and the hinge seat rotates synchronously with the backrest frame assembly 5. The arc-shaped slide 51 moves along a concentric trajectory. At this time, the stepped screw 7 is always tightly fitted to the groove wall in the slide 51 without any offset or jamming. When the backrest is adjusted forward, the stepped screw 7 slides smoothly along the arc-shaped slide 51, producing only relative displacement without transmitting force. When the backrest is adjusted backward, the guiding thrust generated by the inner wall of the arc-shaped slide 51 on the stepped screw 7 drives the stepped screw 7 to drive the linkage force transmission component 3 to move stably, realizing the effective transmission of power. The concentric design of the arc-shaped slide 51 and the rotation center of the synchronous transmission component 62 makes the sliding trajectory of the stepped screw 7 match the rotation trajectory of the backrest frame assembly 5, which greatly reduces the relative friction and motion resistance between the stepped screw 7 and the inner wall of the slide 51, reduces the wear of parts, and extends the service life of the stepped screw 7 and the slide 51.

[0044] Reference Figure 5 , Figure 8 and Figure 10 As shown: The symmetrical support transmission mechanism 1 includes two symmetrically arranged support seats 11, a front connecting rod assembly 12 and a rear connecting rod 13; the two support seats 11 are located on the left and right sides of the seat respectively; the front connecting rod assembly 12 and the rear connecting rod 13 are laterally connected between the two support seats 11, and the seat frame assembly 2 is hinged to the front connecting rod assembly 12 and the rear connecting rod 13.

[0045] When the linkage force transmission component 3 pushes the rear end of the seat frame assembly 2 to rise, the left and right sides of the seat frame assembly 2 simultaneously apply forces to the front connecting rod assembly 12 and the rear connecting rod 13. Under the action of these forces, the front connecting rod assembly 12 and the rear connecting rod 13 swing synchronously around their respective hinge points with the left and right support seats 11. Due to the symmetrical arrangement of the support seats 11 and the lateral rigid connection between the front connecting rod assembly 12 and the rear connecting rod 13, the swing amplitude and force on both sides are completely consistent, providing symmetrical and stable support and motion guidance for the seat frame assembly 2, ensuring that the seat frame assembly 2 rises smoothly in the horizontal direction. When the seat frame assembly 2 returns to its original position, under the action of the elastic return component 4, the left and right sides of the seat frame assembly 2 simultaneously drive the front connecting rod assembly 12 and the rear connecting rod 13 to swing in the opposite direction. The support seats 11 and the connecting rod assembly on both sides still maintain a state of balanced force, causing the seat frame assembly 2 to sink and return to its original position smoothly. The two support seats 11 are symmetrically arranged and, together with the lateral rigid connection between the front link assembly 12 and the rear link 13, make the symmetrical support transmission mechanism 1 form a balanced force system. The force of the seat frame assembly 2 can be evenly transmitted to the support seats 11 on both sides through the multi-point symmetrical hinge structure, ensuring that the force on the left and right sides of the seat is consistent and the timing of the force is synchronized. This effectively avoids structural deformation caused by overload on one side, while improving the synchronicity and stability of the movement of the seat frame assembly 2, and enhancing the load-bearing capacity and service life of the overall structure.

[0046] Reference Figure 1 and Figure 10 As shown: The two support seats 11 of the symmetrical support transmission mechanism 1 are arranged in a mirror symmetrical manner, providing a symmetrical mounting reference surface for the seat frame assembly 2, and the force points of the seat frame assembly 2 are symmetrically distributed along the central axis of the seat, ensuring that the seat frame assembly 2 is subjected to balanced forces and moves synchronously.

[0047] The two support seats 11 of the symmetrical support transmission mechanism 1 are arranged in a mirror-symmetrical manner with the seat centerline as the reference. They are installed on the vehicle body and form a unified and symmetrical installation reference surface, providing installation positioning for related components such as the seat frame assembly 2 and the front linkage assembly 12, ensuring that the installation positions of each component are symmetrical and consistent along the centerline. The hinge points and force points of the seat frame assembly 2 correspond to the symmetrical layout of the support seats 11 and are symmetrically distributed along the seat centerline. Its left and right sides are stably hinged to the corresponding side support seats 11 through the front linkage assembly 12 and the rear linkage 13, and the rear end is connected to the backrest frame assembly 5 through the linkage force transmission component 3. When the linkage force transmission component 3 transmits the lifting force, the force acts synchronously on the left and right sides of the seat frame assembly 2 along the symmetrical force points, so that both sides receive equal and opposite driving forces, causing the left and right sides of the seat frame assembly 2 to lift synchronously upward. When the seat frame assembly 2 returns to its original position, under the action of the elastic return component 4, the left and right sides are also subjected to symmetrical opposite forces, and synchronously sink and reset, maintaining consistent movement throughout the process. This ensures that the left and right sides of the seat frame assembly 2 move completely synchronously, effectively preventing the seat cushion from tilting due to unilateral movement lag or uneven force during adjustment, and ensuring that the occupant's body is always evenly supported.

[0048] Reference Figure 2 , Figure 8 and Figure 10 As shown: the front end of the seat frame assembly 2 is hinged to the front side of the symmetrical support transmission mechanism 1, and the rear end is connected to the backrest frame assembly 5 through the linkage force transmission component 3. The seat frame assembly 2 and the symmetrical support transmission mechanism 1 together form a four-bar linkage mechanism.

[0049] When the seat-back linkage lifting action is initiated, the linkage force transmission component 3 applies an upward thrust to the rear end of the seat frame assembly 2, causing the seat frame assembly 2 to rotate around the hinge point between its front end and the symmetrical support transmission mechanism 1. During this process, the seat frame assembly 2 drives the front linkage assembly 12 and the rear linkage 13 to swing synchronously around their respective hinge points with the symmetrical support transmission mechanism 1. The four-bar linkage, through its own structural constraints, strictly limits the movement trajectory of each component, ensuring that the seat frame assembly 2 maintains a horizontal posture and rises smoothly. When the backrest frame assembly 5 returns to its original position, the elastic return component 4 pushes the front end of the seat frame assembly 2 downward, and the four-bar linkage drives the front linkage assembly 12 and the rear linkage 13 to swing synchronously in the opposite direction. Under the coordinated constraints of the mechanism, the seat frame assembly 2 maintains a horizontal posture and slowly sinks and resets, without any deviation or swaying throughout the entire process. The four-bar linkage provides a stable motion trajectory guide for the lifting and returning of the seat frame assembly 2 through clear component connections and motion constraints. This further avoids instability such as tilting and wobbling of the seat frame assembly 2 during movement, ensuring that the seat cushion surface always remains level and allowing the occupant to experience a smooth and comfortable support experience during seat adjustment.

[0050] Reference Figures 1 to 5As shown: The installation interfaces of each component of the lifting structure are compatible with the existing car seat frame motion mechanism, and the backrest frame assembly 5, the power synchronous drive component 6 and the symmetrical support transmission mechanism 1 can be directly integrated into the existing seat assembly system without modifying the original seat main structure.

[0051] The lifting structure proposed in this invention matches the interface standards of existing automotive seat frame motion mechanisms, and the mounting holes and connection methods of each core component are compatible with existing seat assembly systems. During assembly, no destructive modifications such as drilling or welding are required to the original seat structure: the symmetrical support transmission mechanism 1 is directly fixed to the pre-reserved mounting points on the vehicle body via a slide rail assembly; the backrest frame assembly 5 connects to the existing seat adjuster, and its lower part simultaneously completes a fixed connection with the power synchronization drive component 6; the wiring ports of the power synchronization drive component 6 directly interface with the existing seat control system, eliminating the need for additional control modules; the seat frame assembly 2, the linkage force transmission component 3, and other components are assembled with their corresponding components through preset hinge points. The entire process relies on the installation benchmarks and connection logic of the existing assembly system, quickly completing the integration and assembly of the overall structure. Therefore, rapid integration can be achieved without modifying the original seat structure, significantly reducing the difficulty of product modification and the mass production threshold.

[0052] The above embodiments only illustrate one or more implementation methods of this invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these all fall within the protection scope of this invention. Therefore, the protection scope of this invention should be determined by the appended claims.

Claims

1. A structure for lifting a car seat after it is repositioned, characterized in that, It includes a symmetrical support transmission mechanism (1), a seat frame assembly (2), a linkage force transmission component (3), an elastic return component (4), a backrest frame assembly (5), a power synchronous drive component (6), and a step screw (7). The symmetrical support transmission mechanism (1) is symmetrically arranged on the left and right sides of the seat and fixed to the vehicle body by the slide rail assembly; The seat frame assembly (2) is horizontally arranged above the symmetrical support transmission mechanism (1). Its left and right sides are respectively hinged to the corresponding parts of the symmetrical support transmission mechanism (1) through step bolts, and the rear end of the seat frame assembly (2) is hinged to the lower end of the linkage force transmission component (3) through step bolts. The elastic return member (4) is assembled at the hinge connection between the symmetrical support transmission mechanism (1) and the front end of the seat frame assembly (2), and is sleeved on the outside of the corresponding step bolt; The backrest frame assembly (5) is vertically arranged at the rear end of the seat frame assembly (2), and its lower part is fixedly connected to the power synchronous drive component (6). The lower part of the backrest frame assembly (5) is hinged to the upper end of the linkage force transmission component (3) through the step screw (7).

2. The structure for lifting a car seat after linkage with the backrest as described in claim 1, characterized in that, The power synchronization drive assembly (6) includes a power output component (61) and a synchronization transmission component (62). The power output component (61) is fixed to one side of the backrest frame assembly (5) and is connected to the synchronous transmission component (62) in a transmission manner. The synchronous transmission component (62) extends laterally through the lower part of the backrest frame assembly (5).

3. The structure for realizing the lifting of a car seat backrest according to claim 1, characterized in that, The linkage force transmission component (3) includes a connecting rod A (31). The upper end of the connecting rod A (31) is rotatably connected to the lower part of the backrest frame assembly (5) through the step screw (7). The lower end of the connecting rod A (31) is hinged to the connecting ear plate at the rear end of the seat frame assembly (2) through the step bolt. The connecting rod A (31) is used to transmit the upward force required for the seat frame assembly (2) to be lifted.

4. The structure for lifting a car seat after linkage as described in claim 1, characterized in that, The elastic return component (4) is a return torsion spring. The return torsion spring is sleeved on the stepped bolt at the hinge point between the front end of the seat frame assembly (2) and the symmetrical support transmission mechanism (1). One end of the return torsion spring is engaged with the symmetrical support transmission mechanism (1), and the other end abuts against the seat frame assembly (2), providing elastic driving force for the return of the seat frame assembly (2).

5. The structure for realizing the lifting of a car seat backrest in accordance with claim 1, characterized in that, The backrest frame assembly (5) has a sliding groove (51) on the hinge seat at the bottom. The stepped screw (7) passes through the sliding groove (51) and is hinged to the upper end of the linkage force transmission component (3). When the backrest frame assembly (5) is adjusted forward, the stepped screw (7) slides along the sliding groove (51) and does not generate an upward or downward force on the linkage force transmission component (3).

6. The structure for realizing the lifting of a car seat backrest in linkage according to claim 5, characterized in that, The chute (51) is arc-shaped, and the arc trajectory is centered on the rotation center of the synchronous transmission component (62).

7. The structure for realizing the lifting of a car seat backrest according to claim 1, characterized in that, The symmetrical support transmission mechanism (1) includes two symmetrically arranged support seats (11), a front connecting rod assembly (12), and a rear connecting rod (13). The two support seats (11) are located on the left and right sides of the seat, respectively; The front link assembly (12) and the rear link (13) are laterally connected between two support seats (11), and the seat frame assembly (2) is hinged to the front link assembly (12) and the rear link (13).

8. The structure for realizing the lifting of a car seat backrest according to claim 7, characterized in that, The two support seats (11) of the symmetrical support transmission mechanism (1) are arranged in a mirror symmetrical manner, providing a symmetrical mounting reference surface for the seat frame assembly (2), and the force points of the seat frame assembly (2) are symmetrically distributed along the central axis of the seat, ensuring that the seat frame assembly (2) is subjected to balanced force and moves synchronously.

9. The structure for realizing the lifting of a car seat backrest according to claim 1, characterized in that, The front end of the seat frame assembly (2) is hinged to the front side of the symmetrical support transmission mechanism (1), and the rear end is connected to the backrest frame assembly (5) through the linkage force transmission component (3). The seat frame assembly (2) and the symmetrical support transmission mechanism (1) together constitute a four-bar linkage mechanism.

10. A structure for lifting a car seat backrest in conjunction with the backrest, as described in claim 1, characterized in that, The mounting interfaces of each component of the lifting structure are compatible with the existing car seat frame motion mechanism, and the backrest frame assembly (5), the power synchronous drive component (6) and the symmetrical support transmission mechanism (1) can be directly integrated into the existing seat assembly system without modifying the original seat main structure.

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