Seat framework capable of being folded and laid flat and automobile seat

Abstract

The invention relates to a seat framework capable of being folded and laid flat and an automobile seat. The seat framework capable of being folded and laid flat comprises a cushion framework, a diving assembly and a height adjusting assembly. The cushion framework is arranged above the diving assembly and is connected with the diving assembly; the height adjusting assembly is arranged below the diving assembly and is connected with the diving assembly; the height adjusting assembly comprises a lead screw motor mechanism, a four-bar mechanism and a front transverse pipe. The two groups of four-bar mechanisms are rotatably arranged on the fixed base; the two ends of the front transverse pipe are respectively connected with the four-bar mechanism; one end of the lead screw motor mechanism is connected with the four-bar mechanism, and the other end of the lead screw motor mechanism is connected with the front transverse pipe. According to the scheme provided by the invention, by optimizing the structure, on the premise that the supporting performance of the seat and the leg space of a rear row passenger are not sacrificed, the function that the backrest is folded and laid flat is achieved, and the comfort and practicability of the rear row passenger are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, and more particularly to a foldable, flat seat frame and an automotive seat. Background Technology

[0002] Car seats are the core functional and comfort components in a car cabin. Based on ergonomics, they provide a stable and comfortable seating position for drivers and passengers by supporting the human torso, hips, and limbs. At the same time, in scenarios such as vehicle movement, acceleration, braking, and sudden collisions, they work with seat belts, airbags, and other devices to ensure the personal safety of drivers and passengers.

[0003] Current car seats typically employ a thinner backrest and seat cushion design and a higher backrest rotation axis to achieve a flat-folding effect. While this design achieves the goal of folding flat, it significantly sacrifices seat support and softness, severely impacting ride comfort. Another technology achieves flat-folding by having the seat cushion fold forward and downward (such as patent CN 116039469A), but products using this solution lack seat height adjustment, failing to accommodate the needs of passengers of different heights. Even products that integrate seat height adjustment often suffer from poor structural design, resulting in limited legroom for rear passengers and reducing rear passenger comfort and practicality.

[0004] Therefore, this application aims to provide a foldable and flattenable seat frame and car seat that effectively integrates height adjustment and flattening functions without sacrificing seat support or rear passenger legroom. This not only enables the seat to adjust its height to accommodate passengers of different heights but also allows for a flattened seatback, significantly improving rear passenger comfort and practicality. Furthermore, it effectively solves the problems of complex motor mounting structures or insufficient installation strength that often result from integrating height adjustment and flattening functions. Summary of the Invention

[0005] To overcome the problems existing in related technologies, this application provides a foldable and flattenable seat frame and car seat. This foldable and flattenable seat frame and car seat effectively integrate height adjustment and flattening functions without sacrificing seat support or rear passenger legroom. It not only provides height adjustment to accommodate passengers of different heights but also enables the seat back to fold flat, greatly improving the comfort and practicality of rear passenger seating. Simultaneously, it effectively solves the problems of complex motor mounting structures or insufficient installation strength caused by integrating height adjustment and flattening functions.

[0006] The first aspect of this application is to provide a foldable and flattenable seat frame, including a seat cushion frame, a lowering assembly, and a height adjustment assembly; the seat cushion frame is disposed above and connected to the lowering assembly, and is used to move forward and downward under the drive of the lowering assembly; the height adjustment assembly is disposed below and connected to the lowering assembly; wherein, the height adjustment assembly includes a lead screw motor mechanism, a four-bar linkage mechanism, and a front cross tube; two sets of the four-bar linkage mechanisms are rotatably mounted on a fixed base; both ends of the front cross tube are respectively connected to the four-bar linkage mechanism; one end of the lead screw motor mechanism is connected to the four-bar linkage mechanism, and the other end is connected to the front cross tube; the lowering assembly includes a crank-slider mechanism and a lowering motor mechanism; one end of the lowering motor mechanism is connected to the seat cushion frame, and the other end is connected to the height adjustment assembly; the crank-slider mechanism is rotatably mounted on the four-bar linkage mechanism and connected to the seat cushion frame.

[0007] In a preferred embodiment of this application, the four-bar linkage includes an upper link, a lower link, a front link, and a rear link; the lower link is slidably mounted on the fixed base; the upper link is positioned directly above the lower link; the front link is positioned at the front end of the upper and lower links, with one end of the front link movably riveted to the upper link and the other end movably riveted to the lower link; the rear link is positioned at the rear end of the upper and lower links, with one end of the rear link movably riveted to the upper link and the other end movably riveted to the lower link.

[0008] In a preferred embodiment of this application, the lead screw motor mechanism includes a high-adjustment drive motor, a transmission assembly, a high-adjustment lead screw, and a high-adjustment push rod; the high-adjustment drive motor is fixed to the front cross tube by a mounting bracket; the high-adjustment lead screw is connected to the output end of the high-adjustment drive motor through the transmission assembly, and the extension direction of the high-adjustment lead screw is the front-to-back direction; one end of the high-adjustment push rod is connected to the lower end of the rear connecting rod, and the other end is connected to the nut of the high-adjustment lead screw.

[0009] In a preferred embodiment of this application, the descent assembly includes a crank-slider mechanism and a descent motor mechanism; one end of the descent motor mechanism is connected to the seat frame, and the other end is connected to the height adjustment assembly; the crank-slider mechanism is rotatably mounted on the height adjustment assembly and connected to the seat frame.

[0010] In a preferred embodiment of this application, the crank-slider mechanism includes a crank, a connecting rod, and a slider; the upper connecting rod of the high-adjustment component is provided with a strip-shaped groove; one end of the crank is rotatably mounted on the upper connecting rod, and the other end is connected to the connecting rod; the connecting rod is disposed between the two cranks, and the extension direction of the connecting rod is left-right; the slider is movably disposed in the strip-shaped groove and connected to the seat cushion frame.

[0011] In a preferred embodiment of this application, the diving motor mechanism includes a diving motor and a diving push rod; the diving motor is connected to the seat frame; one end of the diving push rod is fixed to the height adjustment component, and the other end is connected to the diving motor, and the extension direction of the diving push rod is the front-to-back direction.

[0012] In a preferred embodiment of this application, the seat frame includes a connecting horizontal tube and a connecting swing arm; the connecting horizontal tube is disposed at the front end of the seat frame; the connecting swing arm is rotatably disposed on the connecting horizontal tube and connected to the submersion motor.

[0013] In a preferred embodiment of this application, the high-adjustment component further includes a rear horizontal tube; the rear horizontal tube is disposed at the rear end of the four-bar linkage and is parallel to the front horizontal tube, and is connected to the four-bar linkage; one end of the diving motor mechanism is connected to the rear horizontal tube.

[0014] In a preferred embodiment of this application, a fixed bracket and a lubrication bushing are further included; the lubrication bushing is sleeved on the rear horizontal tube and located at one end of the rear horizontal tube; the fixed bracket is sleeved on the lubrication bushing, and one end of the lubrication bushing is fixedly connected to the lowering push rod, and the other end is fixedly connected to the upper connecting rod of the height adjustment component.

[0015] A second aspect of this application is to provide an automobile seat, including the aforementioned foldable and flattenable seat frame.

[0016] The technical solution provided in this application has the following beneficial effects: The foldable and flattenable seat frame of this application includes a seat cushion frame, a lowering component, a height adjustment component, and a backrest frame. By setting the height adjustment component as a motor-driven four-bar linkage and placing the lowering component on the height adjustment component, the height adjustment and flattening functions can be effectively integrated without sacrificing seat support and rear passenger legroom. This not only enables the seat to have a height adjustment function to adapt to the usage needs of drivers and passengers of different heights, but also realizes the folding and flattening function of the seat back, greatly improving the comfort and practicality of rear passenger seating. By setting a lubricating bushing, lubrication and friction reduction are achieved, effectively reducing the frictional resistance between the fixed bracket and the rear cross tube, extending the service life of the fixed bracket and the rear cross tube, and improving the smoothness and comfort of seat adjustment. Meanwhile, by connecting the lowering push rod and the upper and rear connecting rods of the high-adjustment component together through the fixed bracket, not only is the rear horizontal tube of the high-adjustment component reused, reducing the need for additional tubing, but most of the impact load is also effectively transferred to the rear horizontal tube of the high-adjustment component, while a smaller eccentric load is transferred to the upper connecting rod. Furthermore, it occupies very little space and will not affect the legroom of the rear passengers, effectively solving the problem of complex motor installation structure or insufficient installation strength caused by integrating high-adjustment and lowering functions.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0019] Figure 1 This is a schematic diagram of the structure of a foldable and flattenable seat frame shown in an embodiment of this application; Figure 2 This is an exploded view of the foldable and flattenable seat frame shown in the embodiments of this application; Figure 3 This is a schematic diagram of the structure of the high-profile component shown in the embodiments of this application; Figure 4 This is an exploded view of the high-profile component shown in the embodiments of this application; Figure 5 This is an exploded view of the submersible assembly shown in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the foldable and flattenable seat frame in the folded and flattened state as shown in the embodiments of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Seat cushion frame; 11. Connecting cross tube; 12. Connecting swing arm; 2. Diving assembly; 21. Crank and slide mechanism; 211. Crank; 212. Connecting rod; 213. Slider; 22. Diving motor mechanism; 221. Diving motor; 222. Diving push rod; 3. High adjustment assembly; 31. Lead screw motor mechanism; 311. High adjustment drive motor; 312. Transmission assembly; 313. High adjustment lead screw; 314. High adjustment push rod; 32. Four-bar linkage; 321. Upper linkage; 3211. Strip groove; 322. Lower linkage; 323. Front linkage; 324. Rear linkage; 33. Front cross tube; 34. Rear cross tube; 4. Fixed bracket; 5. Lubricating bushing; 6. Backrest frame. Detailed Implementation

[0021] Preferred embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0022] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0023] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0024] Current car seats typically employ a thinner backrest and seat cushion design and a higher backrest rotation axis to achieve a flat-folding effect. While this design achieves the goal of folding flat, it significantly sacrifices seat support and softness, severely impacting ride comfort. Another technology achieves flat-folding by having the seat cushion fold forward and downward (such as patent CN 116039469A), but products using this solution lack seat height adjustment, failing to accommodate the needs of passengers of different heights. Even products that integrate seat height adjustment often suffer from poor structural design, resulting in limited legroom for rear passengers and reducing rear passenger comfort and practicality.

[0025] To address the aforementioned issues, this application provides a foldable, flat-folding seat frame and car seat. Without sacrificing seat support or rear passenger legroom, it effectively integrates height adjustment and flat-folding functions. This not only provides height adjustment to accommodate passengers of different heights but also enables the seat back to fold flat, significantly improving rear passenger comfort and practicality. Furthermore, it effectively solves the problems of complex motor mounting structures or insufficient installation strength that can result from integrating height adjustment and flat-folding functions.

[0026] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings. Example 1

[0027] Please see Figures 1-6 The foldable and flattenable seat frame of this application includes a seat cushion frame 1, a sinking component 2, a height adjustment component 3, and a backrest frame 6. The seat cushion frame 1 is positioned above and connected to the sinking component 2, and can move forward and downward under the action of the sinking component 2 to provide space for subsequent folding and flattening of the seat back. The height adjustment component 3 is positioned below and connected to the sinking component 2; that is, the sinking component 2 is positioned between the seat cushion frame 1 and the height adjustment component 3, and is connected to both. The backrest frame 6 is rotatably positioned at the rear end of the seat cushion frame 1 and connected to the seat cushion frame 1, facilitating user adjustment of the backrest angle and enabling the seat back to fold and flatten. It should be noted that the specific structures of the seat cushion frame 1 and the backrest frame 6 are prior art and will not be detailed here.

[0028] like Figures 3-4As shown, the height adjustment component 3 includes a lead screw motor mechanism 31, a four-bar linkage 32, a front cross tube 33, and a rear cross tube 34. Two sets of the four-bar linkages 32 are rotatably mounted on a fixed base to drive the seat cushion frame 1 to move, thereby adjusting the seat height. Both ends of the front cross tube 33 are connected to the four-bar linkages 32, forming a stable front-end connection structure. The rear cross tube 34 is located at the rear end of the four-bar linkages 32, parallel to the front cross tube 33, and connected to the four-bar linkages 32, further enhancing the structural strength and stability of the entire height adjustment component 3 and ensuring smooth operation of the seat during height adjustment. One end of the lead screw motor mechanism 31 is connected to the four-bar linkage 32, and the other end is connected to the front cross tube 33. Driven by the lead screw motor, precise adjustment of the seat height is achieved.

[0029] For example, the four-bar linkage 32 includes an upper linkage 321, a lower linkage 322, a front linkage 323, and a rear linkage 324. The lower linkage 322 is slidably mounted on the fixed base, providing sliding space for seat height adjustment. The upper linkage 321 is located directly above the lower linkage 322, and the front cross tube 33 is located at the front end of the upper linkage 321, passes through the upper linkage 321, and is fixedly connected to the upper linkage 321. The front connecting rod 323 is located at the front end of the upper connecting rod 321 and the lower connecting rod 322, with one end of the front connecting rod 323 movably riveted to the upper connecting rod 321 and the other end movably riveted to the lower connecting rod 322. The rear connecting rod 324 is located at the rear end of the upper connecting rod 321 and the lower connecting rod 322, with one end of the rear connecting rod 324 movably riveted to the upper connecting rod 321 and the other end movably riveted to the lower connecting rod 322, making the four-bar linkage 32 more flexible and stable during adjustment. The lead screw motor mechanism 31 includes a high-adjustment drive motor 311, a transmission assembly 312, a high-adjustment lead screw 313, and a high-adjustment push rod 314. The high-adjustment drive motor 311 is fixed to the front horizontal tube 33 by a mounting bracket, and the length direction of the high-adjustment drive motor 311 is left-right, used to drive the high-adjustment lead screw 313 to move. The mounting bracket is located at one end of the front horizontal tube 33. The high-adjustment lead screw 313 is connected to the output end of the high-adjustment drive motor 311 via the transmission assembly 312, and the extension direction of the high-adjustment lead screw 313 is in the front-to-back direction, ensuring high efficiency of transmission and that the movements of each component do not interfere with each other. One end of the high-adjustment push rod 314 is connected to the lower end of the rear connecting rod 324, and the other end is connected to the nut of the high-adjustment lead screw 313.

[0030] When passengers need to adjust the seat height, the height adjustment drive motor 311 is activated, which drives the height adjustment lead screw 313 to rotate via the transmission assembly 312. The nut on the height adjustment lead screw 313 moves back and forth, thereby driving the height adjustment push rod 314 to move back and forth. In turn, the height adjustment push rod 314 pushes the rear connecting rod 324. Since the rear connecting rod 324 is movably riveted to the upper connecting rod 321 and the lower connecting rod 322, and the front connecting rod 323 is also movably riveted to the upper connecting rod 321 and the lower connecting rod 322, the movement of the four-bar linkage 32 is finally realized, thereby driving the seat cushion frame 1 to adjust the height to meet the usage needs of passengers of different heights.

[0031] The descent assembly 2 includes a crank-slider mechanism 21 and a descent motor mechanism 22. One end of the descent motor mechanism 22 is connected to the seat frame 1, and the other end is connected to the rear cross tube 34 of the height adjustment assembly 3, providing power for the forward and downward movement of the seat frame 1. Specifically, the descent motor mechanism 22 includes a descent motor 221 and a descent push rod 222; the descent motor 221 is connected to the seat frame 1, ensuring the stability of the descent motor 221. For example, the seat frame 1 includes a connecting cross tube 11 and a connecting swing arm 12. The connecting cross tube 11 is disposed at the front end of the seat frame 1, and the connecting swing arm 12 is rotatably disposed on the connecting cross tube 11 and connected to the descent motor 221. One end of the lowering push rod 222 is fixed to the rear horizontal tube 34 of the height adjustment component 3 and is located at one end of the rear horizontal tube 34 of the height adjustment component 3. The other end is connected to the lowering motor 221, and the extension direction of the lowering push rod 222 is in the front-to-back direction. That is, the lowering push rod 222 is arranged parallel to the height adjustment lead screw 313 and is located at the left and right ends of the seat cushion frame 1, respectively. This facilitates full utilization of the space under the seat cushion frame 1 for installing the lead screw motor mechanism 31 and the lowering motor mechanism 22. At the same time, by placing the motors in the lead screw motor mechanism 31 and the lowering motor mechanism 22 below the front end of the seat cushion frame 1, the legroom of the rear passengers will not be affected.

[0032] The crank-slider mechanism 21 is rotatably mounted on the height adjustment component 3 and connected to the seat cushion frame 1. It drives the seat cushion frame 1 to move forward and downward, providing space for the seat back to fold flat. Specifically, the crank-slider mechanism 21 includes a crank 211, a connecting rod 212, and a slider 213. One end of the crank 211 is rotatably mounted on the upper connecting rod 321, and the other end is connected to the connecting rod 212, allowing the crank 211 to rotate around the upper connecting rod 321 and drive the connecting rod 212. The connecting rod 212 is positioned between the two cranks 211, and its extension direction is left-right, ensuring structural symmetry and stability. The connecting rod 212 is also connected to the seat frame 1. The slider 213 is slidably mounted on the height adjustment component 3 and connected to the seat cushion frame 1, enabling smooth movement of the seat cushion frame 1. For example, the upper connecting rod 321 of the high-adjustment component 3 is provided with a strip-shaped groove 3211 to provide a track for the movement of the slider 213. The slider 213 is movably disposed in the strip-shaped groove 3211 and connected to the seat frame 1. Thus, when the submersible motor 221 drives the seat frame 1 to move, it can drive the slider 213 to slide in the strip-shaped groove 3211, thereby realizing the smooth movement of the seat frame 1.

[0033] When the seat needs to be reclined to expand cargo space or provide a more comfortable resting environment or better visibility, the descent motor 221 is activated. Through the cooperation of the descent lead screw and descent push rod 222, the crank 211 is driven to rotate around the upper connecting rod 321, thereby causing the connecting rod 212 to rotate. This, in turn, moves the seat cushion frame 1 forward and downward or backward and upward. During this process, the crank-slider mechanism 21 plays a crucial guiding and supporting role, ensuring the smoothness and stability of the seat cushion frame 1's movement. It should be noted that the descent motor 221 can either drive the crank 211 to move the connecting rod 212, or it can drive the connecting rod 212 to move the crank 211; no limitation is made here.

[0034] Furthermore, to address the issue of insufficient space to install a horizontal tube connecting the left and right high-adjustment side panels when integrating the high-adjustment component and the low-profile component, since the rear mounting point needs to remain stationary relative to the high-adjustment side panel while simultaneously meeting collision strength requirements, the foldable and flattenable seat frame also includes a fixing bracket 4 and a lubrication bushing 5. The lubrication bushing 5 is fitted onto the rear horizontal tube 34 and located at one end of the rear horizontal tube 34, serving to reduce friction and provide lubrication. The fixed bracket 4 is sleeved on the lubrication bushing 5, and one end of the lubrication bushing 5 is fixedly connected to the lowering push rod 222, and the other end is fixedly connected to the upper connecting rod 321 of the height adjustment component 3. By connecting the components together through the fixed bracket 4, not only is the rear cross tube 34 of the height adjustment component 3 reused, thus eliminating the need to set an additional cross tube to connect the upper connecting rods 321 on both sides of the height adjustment component 3, but also effectively transfers most of the impact load to the rear cross tube 34 of the height adjustment component 3, while a smaller eccentric load is transferred to the upper connecting rod 321, and it occupies very little space, without affecting the legroom of the rear passengers.

[0035] Working principle: When passengers need to adjust the seat height, the height adjustment drive motor 311 is activated, which drives the height adjustment lead screw 313 to rotate via the transmission assembly 312. The nut of the height adjustment lead screw 313 moves linearly back and forth on the lead screw 313, thereby pushing the height adjustment push rod 314 to move back and forth accordingly. The height adjustment push rod 314 is connected to the lower end of the rear link 324 in the four-bar linkage 32, so its movement will cause the rear link 324 to swing. Since the upper link 321, lower link 322, front link 323 and rear link 324 in the four-bar linkage 32 are all connected by movable riveting, the swing of the rear link 324 will cause the entire four-bar linkage 32 to move, thereby driving the seat cushion frame 1 to adjust its height by raising or lowering it to meet the personalized needs of passengers of different heights. When the seat back needs to be folded flat to expand cargo space or provide a more comfortable resting environment, the lowering motor 221 is activated, causing the connecting swing arm 12 to swing, which in turn moves the seat cushion frame 1 forward and downward. This causes the slider 213 to slide within the strip groove 3211 of the connecting rod 321 on the high-adjustment assembly 3, moving from the high end to the low end. Simultaneously, the crank 211 rotates around the upper connecting rod 321, causing the connecting rod 212 to rotate, further moving the seat cushion frame 1 forward and downward, providing the necessary space for the seat back to fold flat. Then, the backrest frame 6 is adjusted so that it can rotate towards the seat cushion frame 1 until the backrest and seat cushion are in contact, thus effectively realizing the folding and flattening function of the car seat.

[0036] In this first embodiment, the foldable and flattenable seat frame of this application includes a seat cushion frame, a lowering component, a height adjustment component, and a backrest frame. By configuring the height adjustment component as a motor-driven four-bar linkage and placing the lowering component on the height adjustment component, the height adjustment and flattening functions can be effectively integrated without sacrificing seat support or rear passenger legroom. This not only enables the seat to have height adjustment to accommodate the needs of drivers and passengers of different heights but also achieves the folding and flattening function of the seat back, greatly improving the comfort and practicality of rear passenger seating. By setting a lubricating bushing, lubrication and friction reduction are achieved, effectively reducing the frictional resistance between the fixed bracket and the rear cross tube, extending the service life of the fixed bracket and the rear cross tube, and improving the smoothness and comfort of seat adjustment. Meanwhile, by connecting the lowering push rod and the upper and rear connecting rods of the high-adjustment component together through the fixed bracket, not only is the rear horizontal tube of the high-adjustment component reused, reducing the need for additional tubing, but most of the impact load is also effectively transferred to the rear horizontal tube of the high-adjustment component, while a smaller eccentric load is transferred to the upper connecting rod. Furthermore, it occupies very little space and will not affect the legroom of the rear passengers, effectively solving the problem of complex motor installation structure or insufficient installation strength caused by integrating high-adjustment and lowering functions. Example 2

[0037] Corresponding to the aforementioned foldable and flattenable seat frame, this application also proposes a car seat; please refer to [link to relevant documentation]. Figures 1-6 Specifically: Based on the structure of Embodiment 1 above, the car seat provided in Embodiment 2 of this application includes the aforementioned foldable and flattenable seat frame.

[0038] The specific structure of the foldable and flattenable seat frame is detailed in Embodiment 1 above, and will not be repeated here.

[0039] In this embodiment, the car seat can fold down without sacrificing seat support, ensuring good seat support and ride comfort. It also features height adjustment to accommodate passengers of different heights while effectively avoiding impacting legroom for rear passengers, significantly improving rear passenger comfort and practicality.

[0040] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0041] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A foldable and lay-flat seat frame, characterized by, The seat cushion framework (1), the submerging assembly (2) and the high adjustment assembly (3) are provided. The seat cushion framework (1) is arranged above the submerging assembly (2) and connected with the submerging assembly (2), and is driven by the submerging assembly (2) to move forward and downward. The high adjustment assembly (3) is arranged below the submerging assembly (2) and connected with the submerging assembly (2). The high adjustment assembly (3) comprises a screw motor mechanism (31), a four-bar linkage mechanism (32) and a front cross pipe (33). The two groups of four-bar linkage mechanisms (32) are rotatably arranged on the fixed base. The two ends of the front cross pipe (33) are connected with the four-bar linkage mechanisms (32) respectively. One end of the screw motor mechanism (31) is connected with the four-bar linkage mechanism (32), and the other end is connected with the front cross pipe (33). The submerging assembly (2) comprises a crank slide mechanism (21) and a submerging motor mechanism (22). One end of the submerging motor mechanism (22) is connected with the seat cushion framework (1), and the other end is connected with the high adjustment assembly (3). The crank slide mechanism (21) is rotatably arranged on the four-bar linkage mechanism (32) and connected with the seat cushion framework (1).

2. The foldable and flat seat framework according to claim 1, wherein The four-bar linkage mechanism (32) comprises an upper link (321), a lower link (322), a front link (323) and a rear link (324). The lower link (322) is slidably arranged on the fixed base. The upper link (321) is arranged above the lower link (322). The front link (323) is arranged at the front end of the upper link (321) and the lower link (322), and one end of the front link (323) is movably riveted with the upper link (321), and the other end is movably riveted with the lower link (322). The rear link (324) is arranged at the rear end of the upper link (321) and the lower link (322), and one end of the rear link (324) is movably riveted with the upper link (321), and the other end is movably riveted with the lower link (322).

3. The foldable and flat seat framework according to claim 2, wherein The screw motor mechanism (31) comprises a high adjustment driving motor (311), a transmission assembly (312), a high adjustment screw rod (313) and a high adjustment push rod (314). The high adjustment driving motor (311) is fixed on the front cross pipe (33) through a mounting bracket. The high adjustment screw rod (313) is in transmission connection with the output end of the high adjustment driving motor (311) through the transmission assembly (312), and the extension direction of the high adjustment screw rod (313) is the front-rear direction. One end of the high adjustment push rod (314) is connected with the lower end of the rear link (324), and the other end is connected with the nut of the high adjustment screw rod (313).

4. The foldable and flat seat framework according to claim 1, wherein The crank slider mechanism (21) comprises a crank (211), a connecting rod (212) and a slider (213); The upper connecting rod (321) of the high-tune assembly (3) is provided with a strip-shaped sliding groove (3211); One end of the crank (211) is rotatably arranged on the upper connecting rod (321), and the other end is connected with the connecting rod (212); The connecting rod (212) is arranged between the two cranks (211), and the extension direction of the connecting rod (212) is left-right direction; The slider (213) is movably arranged in the strip-shaped sliding groove (3211) and connected with the cushion framework (1).

5. The foldable and flat seat framework according to claim 1, wherein, The diving motor mechanism (22) comprises a diving motor (221) and a diving push rod (222); The diving motor (221) is connected with the cushion framework (1); One end of the diving push rod (222) is fixed on the high-tune assembly (3), and the other end is connected with the diving motor (221), and the extension direction of the diving push rod (222) is front-back direction.

6. The foldable and flat seat framework according to claim 5, wherein, The cushion framework (1) comprises a connecting cross pipe (11) and a connecting swing arm (12); The connecting cross pipe (11) is arranged at the front end of the cushion framework (1); The connecting swing arm (12) is rotatably arranged on the connecting cross pipe (11) and connected with the diving motor (221).

7. The foldable and flat seat framework according to claim 5, wherein, The high-tune assembly (3) further comprises a rear cross pipe (34); The rear cross pipe (34) is arranged at the rear end of the four-bar linkage mechanism (32) and is parallel to the front cross pipe (33) and connected with the four-bar linkage mechanism (32); One end of the diving motor mechanism (22) is connected with the rear cross pipe (34).

8. The foldable and flatable seat frame according to claim 7, wherein Further comprising a fixed support (4) and a lubricating bushing (5); The lubricating bushing (5) is sleeved on the rear cross pipe (34) and located at one end of the rear cross pipe (34); The fixed support (4) is sleeved on the lubricating bushing (5), one end of the lubricating bushing (5) is fixedly connected with the diving push rod (222), and the other end is fixedly connected with the upper connecting rod (321) of the high-tune assembly (3).

9. An automobile seat characterized by comprising: The foldable and flat seat framework according to any one of claims 1-8.

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