Seat basin structure assembly, seat assembly and vehicle

Abstract

The invention discloses a seat basin structure assembly, a seat assembly and a vehicle, and relates to the technical field of vehicle seats, the seat basin structure assembly comprises a base, a cushion frame, an inclination angle adjusting assembly, a lifting driving assembly and a leg support driving assembly; the cushion frame is movably connected to the base; a fixed part of the inclination angle adjusting assembly is arranged on the base, and a movable part is connected with the front side of the cushion frame so as to drive the front side of the cushion frame to swing relative to the rear side; a fixed part of the lifting driving assembly is arranged on the cushion frame, and a movable part of the lifting driving assembly is connected with the base so as to drive the cushion frame to lift relative to the base; the leg support driving assembly is arranged on the front side of the cushion frame and used for driving the leg support supporting plate to move front and back. According to the scheme, the inclination angle adjusting assembly, the lifting driving assembly and the leg support driving assembly are integrated between the base and the cushion frame, so that the cushion frame can be adjusted relative to the base in multiple degrees of freedom, and the problems that a traditional seat is single in adjusting mode, and the multi-dimensional adjusting requirements of hip and leg positions of passengers are difficult to fully meet are solved.

Description

Technical Field

[0001] This application relates to the field of vehicle seat technology, and in particular to a seat pan structure assembly, seat component and vehicle. Background Technology

[0002] As a key component affecting driving and riding comfort, the sophistication of vehicle seat adjustment functions directly impacts the user experience. To accommodate occupants of different body types, vehicle seats typically need to offer a certain degree of adjustability to meet individual seating posture requirements.

[0003] In existing technologies, vehicle seat adjustment modes generally focus on the overall fore-and-aft movement of the seat and changes in the backrest angle, while the adjustment of support for the occupant's hips and legs is relatively limited. As users' demands for ride comfort continue to increase, the traditional single adjustment mode of vehicle seats can no longer fully meet the actual needs of different occupants in terms of leg support, hip and leg positioning, and sitting angle, leading to fatigue during long periods of sitting and thus negatively impacting the actual driving and riding experience. Summary of the Invention

[0004] The main purpose of this application is to propose a seat basin structure assembly to solve the technical problem that the existing vehicle seats have a single adjustment mode, which is difficult to fully adapt to the actual needs of different occupants in terms of leg support, hip and leg position, and sitting angle, resulting in a poor driving and riding experience during long periods of time.

[0005] To achieve the above objectives, the seat basin structure assembly proposed in this application includes:

[0006] Base; A seat cushion frame, which is movably connected to the base; A tilt adjustment assembly is provided, wherein the fixed part of the tilt adjustment assembly is disposed on the base, and the movable part of the tilt adjustment assembly is connected to the front side of the seat cushion frame; the tilt adjustment assembly is used to drive the front side of the seat cushion frame to swing relative to the rear side of the seat cushion frame in a vertical plane. A lifting drive assembly, wherein the fixed part of the lifting drive assembly is disposed on the seat cushion frame, and the movable part of the lifting drive assembly is connected to the base; the lifting drive assembly is used to drive the seat cushion frame to rise or fall relative to the base. A leg support drive assembly is provided, wherein the fixed part of the leg support drive assembly is disposed on the front side of the seat cushion frame, and the movable part of the leg support drive assembly is provided with a leg support support plate; the leg support drive assembly is used to drive the leg support support plate to move forward or backward relative to the seat cushion frame.

[0007] In one embodiment, the tilt adjustment assembly includes a first drive device, a first link, and a second link; the lifting drive assembly includes a second drive device and a third link. The first end of the first connecting rod is rotatably connected to the base about a first axis, the first end of the second connecting rod is rotatably connected to the second end of the first connecting rod about a second axis, and the front side of the seat frame is rotatably connected to the second end of the second connecting rod about a third axis; the fixed part of the first driving device is connected to the first connecting rod, and the movable part of the first driving device is connected to the second connecting rod. The first end of the third link is rotatably connected to the base around the fourth axis, and the rear side of the seat frame is rotatably connected to the second end of the third link around the fifth axis; the fixed part of the second drive device is connected to the seat frame, and the movable part of the second drive device is connected to the third link; the first axis, the second axis, the third axis, the fourth axis, and the fifth axis are horizontally arranged in the left-right direction and are parallel to each other.

[0008] In one embodiment, the tilt adjustment assembly further includes a first gear structure disposed on the second connecting rod, the teeth of the first gear structure being arranged around a sixth axis; the sixth axis is parallel to the first axis. The first driving device includes a first driving motor and a first driving gear. The first driving motor is connected to the first driving gear, and the first driving gear meshes with the first gear structure for transmission. The first driving motor is used to drive the first driving gear to rotate, so as to drive the second connecting rod to rotate relative to the first connecting rod through the first gear structure.

[0009] In one embodiment, the tilt adjustment assembly includes two first drive devices, two first connecting rods, two second connecting rods, and two first gear structures distributed at intervals along the first axis; the tilt adjustment assembly also includes a first connecting crossbar, the two ends of the first connecting crossbar being connected one-to-one with the second ends of the two second connecting rods, and the front side of the seat cushion frame being rotatably connected to the two ends of the first connecting crossbar around the third axis.

[0010] In one embodiment, the tilt adjustment assembly further includes a thickened rack; the thickened rack is connected to the first gear structure, the teeth of the thickened rack are correspondingly overlapped on the teeth of the first gear structure, and the thickened rack meshes with the first drive gear for transmission.

[0011] In one embodiment, the first gear structure is provided with a first limiting groove, and the first connecting rod is provided with a first limiting post, the first limiting post being slidably engaged in the first limiting groove; when the second connecting rod rotates relative to the first connecting rod to a critical angle, the first limiting post abuts against the end of the first limiting groove.

[0012] In one embodiment, the lifting drive assembly further includes a second gear structure disposed on the third connecting rod, the teeth of the second gear structure being arranged around a seventh axis; the seventh axis is parallel to the fourth axis; The second drive device includes a second drive motor and a second drive gear. The second drive motor is connected to the second drive gear, and the second drive gear meshes with the second gear structure for transmission. The second drive motor is used to drive the second drive gear to rotate, so as to drive the seat frame to rotate relative to the third link through the second gear structure.

[0013] In one embodiment, the lifting drive assembly includes two second drive devices, two third connecting rods, and two second gear structures spaced apart along the fourth axis; the lifting drive assembly also includes a second connecting crossbar, the two ends of the second connecting crossbar being connected one-to-one with the second ends of the two third connecting rods, and the rear side of the seat cushion frame being rotatably connected to the two ends of the second connecting crossbar around the fifth axis.

[0014] In one embodiment, the third link is provided with a second limiting groove, and the seat frame is provided with a second limiting post, the second limiting post being slidably engaged in the second limiting groove; when the seat frame rotates relative to the third link to a critical angle, the second limiting post abuts against the end of the second limiting groove.

[0015] In one embodiment, the leg support plate is provided with a third gear structure, the teeth of which are arranged around an eighth axis; The leg support drive assembly further includes a third drive device, a fourth link, and a fifth link; the drive end of the third drive device is rotatably connected to the third gear structure around the eighth axis; the third drive device is used to drive the leg support plate to move forward or backward; the first end of the fourth link is rotatably connected to the front side of the seat cushion frame around the ninth axis; the first end of the fifth link is rotatably connected to the second end of the fourth link around the tenth axis; the second end of the fifth link is provided with a fourth gear structure, the teeth of the fourth gear structure are arranged around the eleventh axis, and the fourth gear structure meshes with the third gear structure for transmission; the eighth axis, the ninth axis, the tenth axis, and the eleventh axis are horizontally arranged in the left-right direction and are parallel to each other.

[0016] In one embodiment, the leg support drive assembly further includes a sixth link, the first end of which is rotatably connected to the third gear structure about the eighth axis, and the second end of which is rotatably connected to the fourth gear structure about the eleventh axis.

[0017] In one embodiment, the leg support drive assembly further includes a third connecting crossbar extending along the eighth axis; the drive end is connected to the middle of the third connecting crossbar; the leg support plate is provided with two third gear structures, one of which is rotatably connected to the first end of the third connecting crossbar about the eighth axis, and the other of which is rotatably connected to the second end of the third connecting crossbar about the eighth axis.

[0018] This application also proposes a seat assembly, which includes a seat body and a seat basin structure assembly as described above; the seat basin structure assembly is connected to the seat body.

[0019] This application also proposes a vehicle that includes a seat assembly as described above.

[0020] The seat cushion assembly proposed in this application integrates a tilt adjustment component, a height adjustment drive component, and a leg support drive component between the base and the seat cushion frame, allowing the seat cushion frame to be adjusted relative to the base in multiple degrees of freedom. Specifically, the tilt adjustment component can drive the front side of the seat cushion frame to swing up and down to change the tilt angle of the seat cushion frame, allowing the occupant to obtain different leg support angles; the height adjustment drive component can drive the entire seat cushion frame to rise and fall to adjust the occupant's seating height and the degree of leg flexion and extension; the leg support drive component can drive the leg support plate to extend and retract forward and backward, thereby changing the support length of the seat cushion frame, so that occupants of different heights can obtain sufficient thigh support.

[0021] The three adjustment functions mentioned above are integrated into the same seat basin structure assembly, which can jointly improve the adaptability and comfort of the seat. This effectively solves the problem that the traditional seat adjustment mode is singular and cannot fully meet the multi-dimensional adjustment needs of the occupants' hips and legs, thereby improving the driving and riding experience. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the overall structure of an embodiment of the seat basin structure assembly provided in this application; Figure 2 A partial structural schematic diagram of the tilt adjustment component and the lifting drive component in one embodiment of the seat basin structure assembly provided in this application; Figure 3 A schematic diagram of the tilt adjustment component from a first-view perspective in one embodiment of the seat basin structure assembly provided in this application; Figure 4 A schematic diagram of the tilt adjustment component from a second perspective in one embodiment of the seat basin structure assembly provided in this application; Figure 5 A first-view structural schematic diagram of the lifting drive component in one embodiment of the seat basin structure assembly provided in this application; Figure 6 A second-view structural schematic diagram of the lifting drive component in one embodiment of the seat basin structure assembly provided in this application; Figure 7 A three-dimensional structural schematic diagram of the leg support drive assembly in one embodiment of the seat basin structure assembly provided in this application; Figure 8 A schematic diagram of the leg support drive assembly in the retracted state in one embodiment of the seat basin structure assembly provided in this application; Figure 9 A schematic diagram of the leg support drive assembly in the extended state in one embodiment of the seat basin structure assembly provided in this application; Figure 10 A partial structural schematic diagram of the leg support drive assembly in one embodiment of the seat basin structure assembly provided in this application.

[0024] Explanation of icon numbers: 1. Base; 11. First guide rail; 12. First slider; 2. Seat cushion frame; 21. Second limiting post; 3. Tilt adjustment assembly; 31. First drive unit; 32. First connecting rod; 33. Second connecting rod; 34. First gear structure; 35. First connecting crossbar; 36. Thickened rack; 321. First limiting post; 341. First limiting groove; 4. Lifting drive assembly; 41. Second drive unit; 42. Third connecting rod; 43. Second gear structure; 44. Second connecting crossbar; 421. Second limiting groove; 5. Leg support drive assembly; 51. Third drive unit; 52. Fourth link; 53. Fifth link; 54. Sixth link; 55. Third connecting crossbar; 56. Second guide rail; 57. Second slider; 58. Seventh link; 59. U-shaped bracket; 511. Drive end; 531. Fourth gear structure; 591. First end; 592. Second end; 6. Leg support plate; 7. Third gear structure.

[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0029] As a key component affecting driving and riding comfort, the sophistication of vehicle seat adjustment functions directly impacts the user experience. To accommodate occupants of different body types, vehicle seats typically need to offer a certain degree of adjustability to meet individual seating posture requirements.

[0030] In existing technologies, vehicle seat adjustment modes generally focus on the overall fore-and-aft movement of the seat and changes in the backrest angle, while the adjustment of support for the occupant's hips and legs is relatively limited. As users' demands for ride comfort continue to increase, the traditional single adjustment mode of vehicle seats can no longer fully meet the actual needs of different occupants in terms of leg support, hip and leg positioning, and sitting angle, leading to fatigue during long periods of sitting and thus negatively impacting the actual driving and riding experience.

[0031] To address the aforementioned issues, this application proposes a seat cushion structure assembly that integrates an angle adjustment component, a height adjustment drive component, and a leg support drive component between the base and the seat cushion frame. This allows the seat cushion frame to be adjusted relative to the base in multiple degrees of freedom, thereby enhancing the adaptability and comfort of the seat. This effectively solves the problem that traditional seats have a single adjustment mode and cannot fully meet the multi-dimensional adjustment needs of the occupant's hips and legs, thus improving the driving and riding experience.

[0032] Please see Figure 1 , Figure 2 and Figure 7 The seat basin structure assembly provided in this application embodiment includes: Base 1; Seat cushion frame 2, which is movably connected to base 1; The tilt adjustment component 3 has a fixed part on the base 1 and a movable part connected to the front side of the seat frame 2. The tilt adjustment component 3 is used to drive the front side of the seat frame 2 to swing relative to the rear side of the seat frame 2 in a vertical plane. The lifting drive assembly 4 has a fixed part on the seat frame 2 and a movable part connected to the base 1; the lifting drive assembly 4 is used to drive the seat frame 2 to rise or fall relative to the base 1. The leg support drive assembly 5 has a fixed part located on the front side of the seat frame 2, and a leg support support plate 6 provided on the movable part of the leg support drive assembly 5. The leg support drive assembly 5 is used to drive the leg support support plate 6 to move forward or backward relative to the seat frame 2.

[0033] In this embodiment, the base 1 is the mounting base of the overall structure, used to fix the entire seat pan structure assembly to the vehicle body. The base 1 can be configured as a plate structure or a frame structure, and its specific shape and size can be adapted to the mounting point location on the vehicle floor and the surrounding space. The base 1 is usually made of metal to ensure sufficient structural strength and rigidity to withstand various loads generated by the weight of the occupants and road impacts during vehicle operation.

[0034] The seat frame 2 is the main skeletal structure used to support the occupant's buttocks and legs. The seat frame 2 can be roughly rectangular in shape and can be manufactured from metal tubing or sheet metal through processes such as stamping, welding, and riveting, possessing high structural strength. The seat frame 2 can be movably connected to the base 1 via linkages, slide rails, gears, or other transmission structures using hinged, sliding, or meshing methods, giving the seat frame 2 multiple degrees of freedom of movement relative to the base 1.

[0035] The tilt adjustment assembly 3 may include a drive device and a matching transmission mechanism. The fixed part of the tilt adjustment assembly 3 is mounted on the base 1, and the movable part of the tilt adjustment assembly 3 is connected to the front side of the seat cushion frame 2. Through the driving action of the tilt adjustment assembly 3, the distance between the front side of the seat cushion frame 2 and the base 1 can be specifically changed, thereby causing the front side of the seat cushion frame 2 to swing relative to the rear side of the seat cushion frame 2 in a vertical plane. The front side of the seat cushion frame 2 refers to the side of the seat cushion frame 2 closest to the occupant's knees, and the rear side of the seat cushion frame 2 refers to the side of the seat cushion frame 2 closest to the occupant's buttocks. When the front side of the seat cushion frame 2 swings upward, the seat cushion frame 2 presents a front-high, rear-low posture; when the front side swings downward, the seat cushion frame 2 presents a front-low, rear-high posture. Through this swing adjustment, the contact angle between the occupant's thighs and the seat cushion can be changed, thereby optimizing the support effect on the buttocks and legs and alleviating the pressure on the buttocks and legs during long-term sitting.

[0036] The lifting drive assembly 4 may include a drive device and a matching transmission mechanism; the fixed part of the lifting drive assembly 4 is mounted on the seat frame 2, and the movable part of the lifting drive assembly 4 is connected to the base 1. Through the driving action of the lifting drive assembly 4, the distance between the seat frame 2 and the base 1 can be changed, thereby causing the seat frame 2 to rise or fall relative to the base 1. Through the above-mentioned lifting adjustment, the height of the occupant's buttocks off the ground can be changed, thereby adjusting the degree of flexion and extension of the occupant's legs, thus better adapting to the actual riding needs of occupants of different body types and sitting postures.

[0037] The leg support drive assembly 5 may include a drive device and a matching transmission mechanism. The fixed part of the leg support drive assembly 5 is located on the front side of the seat frame 2, and the movable part of the leg support drive assembly 5 is provided with a leg support plate 6. Through the driving action of the leg support drive assembly 5, the leg support plate 6 can be directly or indirectly driven to move forward or backward relative to the seat frame 2. Moving the leg support plate 6 forward means moving away from the seat frame 2 to extend the leg support, thereby increasing the support length for the occupant's thighs. Moving the leg support plate 6 backward means moving closer to the seat frame 2 to retract the leg support, thereby reducing the support length for the occupant's thighs.

[0038] In this embodiment, both the tilt adjustment component 3 and the lifting drive component 4 can be equipped with flexible mechanisms to achieve flexible transmission, thereby avoiding problems such as jamming and motion interference caused by rigid structures. Specifically, when the tilt adjustment component 3 is working, the fixed part of the tilt adjustment component 3 remains stationary relative to the base 1, while the movable part of the tilt adjustment component 3 drives the front side of the seat frame 2 to swing around a virtual axis, which is approximately located near the rear side of the seat frame 2. During the swinging tendency of the front side of the seat frame 2, the flexible mechanism in the lifting drive component 4 can adapt to the movement of the seat frame 2 to a certain extent, thereby ensuring that the front side of the seat frame 2 can swing relative to the rear side of the seat frame 2 along a preset motion trajectory, avoiding interference of the lifting drive component 4 with the tilt adjustment operation of the seat frame 2. Similarly, when the lifting drive assembly 4 is working, the fixed part of the lifting drive assembly 4 moves together with the seat frame 2, and the movable part of the lifting drive assembly 4 is displaced relative to the base 1, thereby pushing or pulling the seat frame 2 as a whole to rise or fall. During this process, the flexible mechanism in the tilt adjustment assembly 3 can adapt to the movement of the seat frame 2 and make a certain degree of adaptive movement, thereby ensuring that the seat frame 2 as a whole can rise or fall relative to the base 1 along the preset movement trajectory, and avoiding interference from the tilt adjustment assembly 3 on the lifting operation of the seat frame 2.

[0039] Based on the above settings, the tilt adjustment component 3, the height adjustment drive component 4, and the leg support drive component 5 can each independently perform their respective adjustment functions without motion interference; the three adjustment functions can be performed individually or simultaneously according to the needs of the occupants to achieve multi-dimensional combination adjustment of sitting posture.

[0040] Therefore, the seat cushion assembly provided in this embodiment integrates the tilt adjustment component 3, the lifting drive component 4, and the leg support drive component 5 between the base 1 and the seat frame 2, allowing the seat frame 2 to be adjusted relative to the base 1 in multiple degrees of freedom. Specifically, the tilt adjustment component 3 can drive the front side of the seat frame 2 to swing up and down to change the tilt angle of the seat frame 2, so that the occupant can obtain different leg support angles. The lifting drive component 4 can drive the seat frame 2 to lift and lower as a whole to adjust the occupant's sitting height and the degree of leg flexion and extension. The leg support drive component 5 can drive the leg support support plate 6 to extend and retract back and forth, thereby changing the support length of the seat frame 2, so that occupants of different heights can obtain sufficient thigh support.

[0041] The three adjustment functions mentioned above are integrated into the same seat basin structure assembly, which can jointly improve the adaptability and comfort of the seat. This effectively solves the problem that the traditional seat adjustment mode is singular and cannot fully meet the multi-dimensional adjustment needs of the occupants' hips and legs, thereby improving the driving and riding experience.

[0042] Preferably, such as Figure 2 As shown, the base 1 may include a first guide rail 11 and a first slider 12. The first guide rail 11 extends in the front-to-back direction and is fixed to the vehicle body structure. The first slider 12 slides on the first guide rail 11 in the front-to-back direction. The seat cushion frame 2 is movably connected to the first slider 12. In this way, the seat cushion frame 2 can move in the front-to-back direction through the sliding engagement between the first slider 12 and the first guide rail 11, so as to change the seating space by adjusting the seat forward and backward, thereby better adapting to the actual seating needs of occupants of different body types.

[0043] In one embodiment, refer to Figure 2 , Figure 3 and Figure 5 The tilt adjustment assembly 3 includes a first drive device 31, a first link 32, and a second link 33; the lifting drive assembly 4 includes a second drive device 41 and a third link 42. The first end of the first link 32 is rotatably connected to the base 1 around the first axis, the first end of the second link 33 is rotatably connected to the second end of the first link 32 around the second axis, and the front side of the seat frame 2 is rotatably connected to the second end of the second link 33 around the third axis; the fixed part of the first drive device 31 is connected to the first link 32, and the movable part of the first drive device 31 is connected to the second link 33. The first end of the third link 42 is rotatably connected to the base 1 around the fourth axis, and the rear side of the seat frame 2 is rotatably connected to the second end of the third link 42 around the fifth axis; the fixed part of the second drive device 41 is connected to the seat frame 2, and the movable part of the second drive device 41 is connected to the third link 42; the first axis, the second axis, the third axis, the fourth axis, and the fifth axis are horizontally arranged in the left-right direction and are parallel to each other.

[0044] Based on the structural configuration of this embodiment, when the seat cushion frame 2 needs to be tilted, the first drive device 31 is activated, and the movable part of the first drive device 31 is displaced relative to the fixed part. The movable part of the first drive device 31 can drive the second link 33 to rotate relative to the first link 32 around the second axis. The rotation of the second link 33 will cause the front side of the seat cushion frame 2 to tend to move upward or downward. During this process, the third link 42 and the rear side of the seat cushion frame 2 can generate adaptive movement under the drive of the front side of the seat cushion frame 2, so that the third link 42 rotates adaptively relative to the base 1 around the fourth axis, and the rear side of the seat cushion frame 2 rotates adaptively relative to the third link 42 around the fifth axis. At the same time, the first link 32 also rotates adaptively relative to the base 1 around the first axis. Based on the linkage structure design of the tilt adjustment component 3 and the lifting drive component 4, during the above-mentioned compound motion process, the adaptive motion amplitude of the rear side of the seat cushion frame 2 is smaller than the active motion amplitude of the front side of the seat cushion frame 2. As a result, the front side of the seat cushion frame 2 swings up and down relative to the rear side of the seat cushion frame 2. This allows for the tilt adjustment of the seat cushion frame 2 without motion jamming or interference.

[0045] When the seat frame 2 needs to be adjusted in height, the second drive device 41 is activated. The movable part of the second drive device 41 is displaced relative to the fixed part. The movable part of the second drive device 41 can drive the third link 42 to rotate relative to the base 1 around the fourth axis. The rotation of the third link 42 will cause the rear side of the seat frame 2 to tend to move upward or downward. During this process, the first link 32, the second link 33, and the front side of the seat frame 2 can produce adaptive movement under the drive of the rear side of the seat frame 2, so that the base 1, the first link 32, the second link 33, and the front side of the seat frame 2 will have adaptive relative rotation. Based on the linkage structure design of the lifting drive component 4 and the tilt adjustment component 3, in the above-mentioned compound movement process, the adaptive movement amplitude of the front side of the seat frame 2 is basically consistent with the active movement amplitude of the rear side of the seat frame 2, so that the seat frame 2 moves upward or downward as a whole. In this way, the height adjustment of the seat frame 2 can be achieved without movement jamming and interference.

[0046] In one embodiment, refer to Figures 2 to 4 The tilt adjustment assembly 3 also includes a first gear structure 34, which is disposed on the second connecting rod 33. The teeth of the first gear structure 34 are arranged around a sixth axis; the sixth axis is parallel to the first axis. The first driving device 31 includes a first driving motor and a first driving gear. The first driving motor is connected to the first driving gear, and the first driving gear meshes with the first gear structure 34 for transmission. The first driving motor is used to drive the first driving gear to rotate, so as to drive the second connecting rod 33 to rotate relative to the first connecting rod 32 through the first gear structure 34.

[0047] In this embodiment, when tilt adjustment is required, the first drive motor drives the first drive gear to rotate around its own axis. The rotational motion of the first drive gear is transmitted to the first gear structure 34 through gear meshing, so as to drive the first drive gear and the first gear structure 34 to mesh and rotate relative to each other. Since the first gear structure 34 is directly or indirectly mounted on the second link 33, and the second link 33 is rotatably connected to the first link 32 through the second axis, the relative meshing rotation between the first drive gear and the first gear structure 34 will drive the second link 33 to rotate relative to the first link 32, causing the front side of the seat frame 2 to tend to move upward or downward relative to the base 1, thereby further driving the first link 32, the third link 42, the rear side of the seat frame 2 and the base 1 to undergo adaptive relative rotation, thereby realizing the tilt adjustment of the seat frame 2.

[0048] When the tilt angle of the seat frame 2 is adjusted to the correct position, the first drive motor stops. At this time, based on the self-locking characteristic of the gear transmission method, the meshing between the first drive gear and the first gear structure 34 can stably maintain the relative position between the second link 33 and the first link 32 in the current state, so that the seat frame 2 can be locked at the target tilt angle position without the need for an additional locking mechanism.

[0049] The specific form of the first gear structure 34 can be selected according to actual needs. For example, the first gear structure 34 can be set as a sector gear with its teeth distributed within a certain arc range; this sector gear can be fixed to the second connecting rod 33 by welding, riveting, bolting, or other methods. Alternatively, the first gear structure 34 can also be set as a complete circular gear, which can be fixed to the second connecting rod 33 by welding, riveting, bolting, or other methods. In addition, the first gear structure 34 and the second connecting rod 33 can also be set as an integral structure, that is, the teeth are directly machined to the corresponding parts of the second connecting rod 33 to improve structural strength and transmission accuracy.

[0050] Compared to other driving methods, gear transmission offers advantages such as smooth transmission, high control precision, and the ability to transmit larger torques. Furthermore, the integrated design of the first drive motor and the first drive gear makes the drive unit structure more compact. In this embodiment, through the meshing transmission between the first gear structure 34 and the first drive gear, the rotational motion of the motor can be precisely converted into the swing angle of the seat frame 2, which is more conducive to achieving stepless adjustment or precise gear adjustment of the seat frame 2's tilt angle.

[0051] In one embodiment, refer to Figures 2 to 4The tilt adjustment assembly 3 includes two first drive devices 31, two first connecting rods 32, two second connecting rods 33, and two first gear structures 34, which are spaced apart along the first axis. The tilt adjustment assembly 3 also includes a first connecting crossbar 35, the two ends of which are connected to the second ends of the two second connecting rods 33 in a one-to-one correspondence. The front side of the seat frame 2 is rotatably connected to the two ends of the first connecting crossbar 35 around the third axis.

[0052] In this embodiment, the two sets of linkage mechanisms and two sets of drive devices of the tilt adjustment component 3 are symmetrically arranged in the left-right direction, and the second linkages 33 on the left and right sides are connected by the first connecting crossbar 35, thereby realizing synchronous drive of the front side of the seat cushion frame 2 in the left-right direction. Specifically, when the first drive devices 31 on the left and right sides work simultaneously, the first connecting crossbar 35 can evenly transmit the driving force to the left and right sides to ensure that the left and right ends of the front side of the seat cushion frame 2 always maintain the same displacement and rotation angle during the tilt adjustment process. This avoids the problem of the seat cushion frame 2 tilting or jamming due to asynchronous movement, thereby improving the smoothness and stability of the tilt adjustment operation. At the same time, by setting the first connecting crossbar 35, the overall structural rigidity of the tilt adjustment component 3 is also enhanced.

[0053] Among them, such as Figure 2 As shown, with the first connecting crossbar 35 provided, the two first gear structures 34 can be fixed to the left and right ends of the first connecting crossbar 35 one by one.

[0054] In one embodiment, refer to Figures 2 to 4 The tilt adjustment component 3 also includes a thickened rack 36; the thickened rack 36 is connected to the first gear structure 34, and the teeth of the thickened rack 36 are overlapped one-to-one with the teeth of the first gear structure 34, and the thickened rack 36 meshes with the first drive gear for transmission.

[0055] In this embodiment, the thickened rack 36 is stacked on the first gear structure 34, and the first gear structure 34 and the thickened rack 36 mesh together with the first drive gear. This increases the actual tooth width of the first gear structure 34 and the actual meshing contact area, which can disperse the contact stress during the meshing transmission process and reduce the wear rate of individual teeth, thereby improving the load-bearing capacity and service life of the gear transmission structure. The thickened rack 36 can be fixed to the first gear structure 34 by welding, riveting, bolting, or other methods.

[0056] In one embodiment, refer to Figures 2 to 4The first gear structure 34 is provided with a first limiting groove 341, and the first connecting rod 32 is provided with a first limiting post 321. The first limiting post 321 is slidably fitted in the first limiting groove 341. When the second connecting rod 33 rotates relative to the first connecting rod 32 to a critical angle, the first limiting post 321 abuts against the end of the first limiting groove 341.

[0057] Specifically, the first limiting groove 341 can be configured as an arc-shaped long groove; the first limiting post 321 can be configured as a pin, which can be detachably connected to the first connecting rod 32 by means of plug-in connection, threaded connection or other means.

[0058] During tilt adjustment, as the second link 33 rotates relative to the first link 32, the first limiting post 321 slides relative to the first limiting groove 341. When the second link 33 rotates to the maximum or minimum preset angle, the first limiting post 321 abuts against the corresponding end of the first limiting groove 341, thereby preventing the second link 33 from continuing to rotate. Based on the above limiting structure, the tilt adjustment range can be effectively controlled, preventing damage to the mechanism or interference with other components due to over-adjustment.

[0059] In one embodiment, refer to Figure 2 , Figure 5 and Figure 6 The lifting drive assembly 4 also includes a second gear structure 43, which is disposed on the third link 42. The teeth of the second gear structure 43 are arranged around the seventh axis; the seventh axis is parallel to the fourth axis. The second drive device 41 includes a second drive motor and a second drive gear. The second drive motor is connected to the second drive gear, and the second drive gear meshes with the second gear structure 43 for transmission. The second drive motor is used to drive the second drive gear to rotate, so as to drive the seat frame 2 to rotate relative to the third link 42 through the second gear structure 43.

[0060] In this embodiment, when height adjustment is required, the second drive motor drives the second drive gear to rotate around its own axis. The rotational motion of the second drive gear is transmitted to the second gear structure 43 through gear meshing, so as to drive the second drive gear and the second gear structure 43 to mesh and rotate relative to each other. Since the second gear structure 43 is directly or indirectly set on the third link 42, and the third link 42 is rotatably connected to the base 1 through the fourth axis, the relative meshing rotation between the second drive gear and the second gear structure 43 will drive the third link 42 to rotate relative to the base 1, causing the rear side of the seat frame 2 to tend to move upward or downward relative to the base 1, thereby further driving the first link 32, the second link 33, the front side of the seat frame 2 and the base 1 to undergo adaptive relative rotation, thereby realizing the height adjustment of the seat frame 2.

[0061] When the height of the seat frame 2 is adjusted to the correct position, the second drive motor stops. At this time, based on the self-locking characteristic of the gear transmission method, the meshing between the second drive gear and the second gear structure 43 can stably maintain the relative position between the third link 42 and the base 1 in the current state, so that the seat frame 2 can be locked at the target height position without the need for an additional locking mechanism.

[0062] The specific form of the second gear structure 43 can be selected according to actual needs. For example, the second gear structure 43 can be set as a sector gear with its teeth distributed within a certain arc range; this sector gear can be fixed to the third connecting rod 42 by welding, riveting, bolting, or other methods. Alternatively, the second gear structure 43 can also be set as a complete circular gear, which can be fixed to the third connecting rod 42 by welding, riveting, bolting, or other methods. In addition, the second gear structure 43 and the third connecting rod 42 can also be set as an integral structure, that is, the teeth are directly machined into the corresponding parts of the third connecting rod 42 to improve structural strength and transmission accuracy.

[0063] Compared to other drive methods, gear transmission offers advantages such as smooth transmission, high control precision, and the ability to transmit larger torques. Furthermore, the integrated design of the second drive motor and the second drive gear makes the drive unit structure more compact. In this embodiment, the meshing transmission between the second gear structure 43 and the second drive gear can precisely convert the rotational motion of the motor into the lifting distance of the seat frame 2, facilitating stepless adjustment or precise gear adjustment of the overall height of the seat frame 2.

[0064] In one embodiment, refer to Figure 2 , Figure 5 and Figure 6 The lifting drive assembly 4 includes two second drive devices 41, two third connecting rods 42, and two second gear structures 43, which are spaced apart along the fourth axis. The lifting drive assembly 4 also includes a second connecting crossbar 44, the two ends of which are connected to the second ends of the two third connecting rods 42 in a one-to-one correspondence. The rear side of the seat frame 2 is rotatably connected to the two ends of the second connecting crossbar 44 around the fifth axis.

[0065] In this embodiment, the two sets of linkage mechanisms and two sets of drive devices of the lifting drive assembly 4 are symmetrically arranged in the left-right direction, and the third linkages 42 on the left and right sides are connected by the second connecting crossbar 44, thereby realizing synchronous drive of the rear side of the seat cushion frame 2 in the left-right direction. Specifically, when the second drive devices 41 on the left and right sides work simultaneously, the second connecting crossbar 44 can evenly transmit the driving force to the left and right sides to ensure that the left and right ends of the rear side of the seat cushion frame 2 always maintain the same displacement and rotation angle during the lifting adjustment process. This avoids the problem of seat cushion frame 2 tilting or jamming due to asynchronous movement, thereby improving the smoothness and stability of the lifting adjustment operation. At the same time, by setting the second connecting crossbar 44, the overall structural rigidity of the lifting drive assembly 4 is also enhanced.

[0066] Among them, such as Figure 2 As shown, with the second connecting crossbar 44 provided, the two second gear structures 43 can be fixed to the left and right ends of the second connecting crossbar 44 one by one.

[0067] In one embodiment, refer to Figure 2 , Figure 5 and Figure 6 The third link 42 is provided with a second limiting groove 421, and the seat frame 2 is provided with a second limiting post 21. The second limiting post 21 is slidably fitted in the second limiting groove 421. When the seat frame 2 rotates relative to the third link 42 to the critical angle, the second limiting post 21 abuts against the end of the second limiting groove 421.

[0068] During the lifting and adjusting process, as the third link 42 rotates relative to the base 1, the second limiting post 21 slides relative to the second limiting groove 421. When the third link 42 rotates to the maximum or minimum preset angle, the second limiting post 21 will abut against the corresponding end of the second limiting groove 421, thereby preventing the third link 42 from continuing to rotate. Based on the above limiting structure, the range of height adjustment can be effectively controlled, preventing damage to the mechanism or interference with other components due to over-adjustment.

[0069] In one embodiment, refer to Figures 7 to 9 The leg support plate 6 is provided with a third gear structure 7, and the teeth of the third gear structure 7 are arranged around the eighth axis. The leg support drive assembly 5 also includes a third drive device 51, a fourth link 52, and a fifth link 53; the drive end 511 of the third drive device 51 is rotatably connected to the third gear structure 7 around the eighth axis; the third drive device 51 is used to drive the leg support plate 6 to move forward or backward; the first end of the fourth link 52 is rotatably connected to the front side of the seat frame 2 around the ninth axis; the first end of the fifth link 53 is rotatably connected to the second end of the fourth link 52 around the tenth axis; the second end of the fifth link 53 is provided with a fourth gear structure 531, the teeth of the fourth gear structure 531 are arranged around the eleventh axis, and the fourth gear structure 531 meshes with the third gear structure 7 for transmission; the eighth axis, the ninth axis, the tenth axis, and the eleventh axis are horizontally arranged in the left-right direction and are parallel to each other.

[0070] In this embodiment, the leg support plate 6 is a component that directly contacts and supports the occupant's thigh. The shape of the leg support plate 6 is usually designed as an ergonomic plate structure.

[0071] A third gear structure 7 is provided on the side of the leg support plate 6 facing the seat cushion. The third gear structure 7 can be configured as a toothed plate; one end of the toothed plate can be fixed to the leg support plate 6 by welding, threaded connection or other means; the other end of the toothed plate has multiple teeth arranged circumferentially around the eighth axis, and the teeth can be distributed within a certain arc range to form a structure similar to a sector gear; wherein, the eighth axis can extend along the width direction of the seat.

[0072] The third drive device 51 may include a power source and a matching transmission mechanism, etc., and the drive end 511 constitutes the movable part of the third drive device 51. Through the driving action of the third drive device 51, the leg support plate 6 connected to the drive end 511 can be driven to move back and forth, so as to realize the forward extension or backward retraction of the leg support plate 6. The leg support plate 6 can be rotatably connected to the drive end 511 around the eighth axis by means of hinges or the like, so that the leg support plate 6 can rotate relative to the third drive device 51 around the eighth axis while moving back and forth. It should be noted that the leg support plate 6 can be directly connected to the drive end 511, or the leg support plate 6 can be indirectly connected to the drive end 511 by means of other adapter devices, which is not limited here.

[0073] The second end of the fifth link 53 is provided with a fourth gear structure 531. The fourth gear structure 531 can be configured with the same tooth plate form as the third gear structure 7. The tooth plate has multiple teeth arranged circumferentially around the eleventh axis. The teeth can be distributed within a certain arc range to form a structure similar to a sector gear. The teeth of the fourth gear structure 531 mesh with the teeth of the third gear structure 7, thereby realizing the meshing transmission between the fourth gear structure 531 and the third gear structure 7. That is, the third gear structure 7 can rotate around the eighth axis under the drive of the fourth gear structure 531, and the fourth gear structure 531 can also rotate around the eleventh axis under the drive of the third gear structure 7.

[0074] Based on the above structural configuration, the specific working process and state change mechanism of the leg support drive component 5 in this embodiment are as follows: In the initial state, such as Figure 8 As shown, the drive end 511 of the third drive device 51 is fully retracted. At this time, the fourth link 52 and the fifth link 53 are in a folded state, the third gear structure 7 and the fourth gear structure 531 are in a first meshing state, the lowest teeth of the third gear structure 7 and the lowest teeth of the fourth gear structure 531 mesh with each other, and the leg support plate 6 is in a basically vertical state. At this time, the entire leg support drive assembly 5 occupies the least space in the front-back direction.

[0075] When leg support is required for the occupant, the third drive unit 51 is activated to directly or indirectly drive the leg support plate 6 forward via the drive end 511. During the forward movement of the leg support plate 6, based on the meshing transmission between the third gear structure 7 and the fourth gear structure 531, the third gear structure 7 will rotate counterclockwise relative to the fourth gear structure 531 around the eighth axis, while the fourth gear structure 531 will rotate clockwise relative to the third gear structure 7 around the eleventh axis. The rotation of the fourth gear structure 531 causes the fifth link 53 to rotate synchronously, thereby driving the fifth link 53 to rotate clockwise relative to the fourth link 52 around the tenth axis, while the fourth link 52 also rotates around the ninth axis at the same time. Based on the aforementioned adaptive rotational movements of the fourth link 52 and the fifth link 53, corresponding degrees of freedom of movement can be provided to adapt to the position and angle changes of the fifth link 53 caused by the translational movement of the third gear structure 7 and the meshing transmission between the third gear structure 7 and the fourth gear structure 531. This enables adaptive adjustment of the corresponding components and avoids jamming during the movement of the leg support plate 6.

[0076] As the drive end 511 continues to extend, the leg support plate 6 will continuously rotate counterclockwise around the eighth axis while moving forward; Figure 8 and Figure 9Taking the indicated orientation as an example, the leg support plate 6 can move forward while simultaneously lifting upward. Thus, the leg support plate 6 exhibits a composite motion combining translational and rotational movements. Based on the superposition effect of the stroke, the actual adjustment stroke of the leg support drive assembly 5 is equal to the linear translational distance of the leg support plate 6 directly driven by the third drive device 51 in the front-back direction plus the additional support length contributed by the rotational motion of the leg support plate 6; where the additional support length contributed by the rotational motion of the leg support plate 6 refers to the incremental projection distance of the front end of the leg support plate 6 relative to the rotation center in the front-back direction during the rotation of the leg support plate 6 around the eighth axis.

[0077] Reference Figure 9 When the drive end 511 of the third drive device 51 extends forward completely, the fifth link 53 is fully extended relative to the fourth link 52, the third gear structure 7 and the fourth gear structure 531 are in the second meshing state, the uppermost teeth of the third gear structure 7 and the uppermost teeth of the fourth gear structure 531 mesh with each other, the leg support plate 6 is located at the front end of the adjustment path, and the leg support plate 6 rotates counterclockwise to the maximum preset angle. The front end of the leg support plate 6 has the largest increase in the projection distance in the front-rear direction relative to the rotation center. At this time, the entire leg support drive assembly 5 occupies the largest space in the front-rear direction.

[0078] Therefore, the leg support drive assembly 5 provided in this embodiment, through the meshing transmission between the third gear structure 7 and the fourth gear structure 531, and in conjunction with the adaptive rotation of the fourth link 52 and the fifth link 53, allows the leg support support plate 6 to rotate synchronously while the third drive device 51 drives the leg support plate 6 to translate in the front-back direction. Based on the superposition effect of the above-mentioned composite motion and stroke of the leg support plate 6, the actual adjustment stroke of the leg support drive assembly 5 is equal to the linear translation distance of the leg support plate 6 directly driven by the third drive device 51 in the front-back direction plus the additional support length contributed by the rotational motion of the leg support plate 6. In this way, even with limited internal space of the seat cushion frame and the inability to further lengthen the linear translation portion, the leg support can achieve a larger effective adjustment stroke in the same space by introducing the rotational motion of the leg support plate 6. This can better meet the different leg support needs of passengers of different body types, thereby improving the adaptability of the vehicle seat.

[0079] In one embodiment, refer to Figures 7 to 9 The leg support drive assembly 5 also includes a sixth link 54, the first end of which is rotatably connected to the third gear structure 7 about the eighth axis, and the second end of which is rotatably connected to the fourth gear structure 531 about the eleventh axis.

[0080] In this embodiment, the sixth link 54 is configured as a rigid rod; the first end of the sixth link 54 is rotatably connected to the third gear structure 7 about the eighth axis by means of hinge or other means, and the second end of the sixth link 54 is rotatably connected to the fourth gear structure 531 about the eleventh axis by means of hinge or other means. The shortest straight-line distance between the two rotation centers of the sixth link 54 is equal to the gear center distance between the third gear structure 7 and the fourth gear structure 531.

[0081] By setting the sixth link 54, a constraint effect can be formed on the third gear structure 7 and the fourth gear structure 531, so as to force the meshing transmission relationship between the third gear structure 7 and the fourth gear structure 531 to be maintained synchronously. This ensures that the rotation of the third gear structure 7 and the rotation of the fourth gear structure 531 are kept consistent during the meshing rotation process, thereby improving the reliability and smoothness of gear meshing and avoiding problems such as meshing impact, jamming, and separation caused by asynchronous movement of the third gear structure 7 and the fourth gear structure 531.

[0082] Furthermore, the sixth link 54 also constitutes another force transmission path besides gear meshing. Specifically, when the third drive device 51 outputs driving force, part of the force is transmitted through the meshing point between the third gear structure 7 and the fourth gear structure 531, while the other part is transmitted directly through the sixth link 54. Based on the above-mentioned force diversion effect, the meshing force acting on the third gear structure 7 and the fourth gear structure 531 can be effectively reduced, the contact stress between the teeth can be reduced, thereby reducing the risk of gear wear and extending the service life of the leg support drive assembly 5. At the same time, due to the force diversion effect, the instantaneous load fluctuation at the meshing point between the third gear structure 7 and the fourth gear structure 531 is reduced, thereby improving the smoothness of the operation of the leg support drive assembly 5.

[0083] In one embodiment, refer to Figures 7 to 9 The leg support drive assembly 5 also includes a third connecting crossbar 55, which extends along the eighth axis; the drive end 511 is connected to the middle of the third connecting crossbar 55; the leg support plate 6 is provided with two third gear structures 7, one of which is rotatably connected to the first end of the third connecting crossbar 55 around the eighth axis, and the other is rotatably connected to the second end of the third connecting crossbar 55 around the eighth axis.

[0084] In this embodiment, the third connecting crossbar 55 extends along the eighth axis, meaning the length of the third connecting crossbar 55 is aligned with the width of the seat. The driving end 511 of the third driving device 51 is connected to the middle of the third connecting crossbar 55 to achieve centered transmission of the driving force. Two third gear structures 7 are located on the left and right sides of the leg support plate 6, respectively. One third gear structure 7 is rotatably connected to the left end of the third connecting crossbar 55 via a hinge around the eighth axis, and the other third gear structure 7 is rotatably connected to the right end of the third connecting crossbar 55 via a hinge around the eighth axis.

[0085] like Figure 7 As shown, corresponding to the third gear structure 7, the fourth link 52, the fifth link 53, and the sixth link 54 can also be configured as two sets; one set of the fourth link 52, the fifth link 53, and the sixth link 54 is located at the left end of the third connecting crossbar 55, and is connected to the third gear structure 7 located on the left side based on the connection method in the above embodiment; the other set of the fourth link 52, the fifth link 53, and the sixth link 54 is located at the right end of the third connecting crossbar 55, and is connected to the third gear structure 7 located on the right side based on the connection method in the above embodiment.

[0086] By setting a third connecting crossbar 55, the driving force output by the third drive device 51 can be synchronously transmitted to the two sets of transmission mechanisms located on the left and right sides through the third connecting crossbar 55. This improves the synchronicity of movement on the left and right sides of the leg support plate 6, effectively avoiding problems such as tilting and jamming of the leg support plate 6 caused by asynchronous movement on the left and right sides, ensuring that the leg support plate 6 maintains a stable posture during extension and retraction. In addition, by setting two sets of transmission mechanisms, the rigidity and structural stability of the entire leg support drive assembly 5 can be enhanced, effectively resisting the torsion or deformation that may occur when the leg support plate 6 bears the weight of the passenger's legs.

[0087] In one embodiment, refer to Figures 7 to 9 The leg support drive assembly 5 also includes a second guide rail 56 and a second slider 57; the second slider 57 is slidably fitted on the second guide rail 56 in the front-back direction, and the second slider 57 is connected to the third connecting crossbar 55.

[0088] In this embodiment, the second guide rail 56 is installed on the front side of the seat frame 2. The second slider 57 is slidably fitted onto the second guide rail 56 in the front-back direction, and the second slider 57 can be fixedly connected to the third connecting crossbar 55 by welding, threaded connection or other means.

[0089] Based on the above structural configuration, when the third drive device 51 drives the third connecting crossbar 55 to move back and forth, the third connecting crossbar 55 can drive the second slider 57 to slide synchronously on the second guide rail 56. The sliding cooperation between the second guide rail 56 and the second slider 57 can provide guidance for the linear movement of the third connecting crossbar 55, ensuring that the third connecting crossbar 55 and the corresponding devices on the third connecting crossbar 55 always move smoothly along the preset path, avoiding deviation or shaking. At the same time, the second guide rail 56 and the second slider 57 can also be used to bear the torque and load generated by the leg support plate 6 when bearing the weight of the passenger's legs, and transmit the torque and load to the seat frame 2, thereby reducing the stress on the third drive device 51 and the third connecting crossbar 55, and improving the overall load-bearing capacity and service life of the leg support drive assembly 5.

[0090] In one embodiment, refer to Figures 7 to 9 The leg support drive assembly 5 includes two second guide rails 56 and two second sliders 57. The two second sliders 57 are slidably fitted onto the two second guide rails 56 in a front-back direction. The connection point between the drive end 511 and the third connecting crossbar 55 is located between the two second sliders 57.

[0091] This embodiment provides two second guide rails 56 and two second sliders 57, and sets the connection point of the drive end 511 between the two second sliders 57. This provides two-point support and guidance for the third connecting crossbar 55, allowing the driving force to be evenly transmitted to the second sliders 57 and the second guide rails 56 on both sides. This reduces the uneven wear of the second guide rails 56 and the second sliders 57, thereby further improving the stability of the movement of the third connecting crossbar 55 and the leg support plate 6, and avoiding the risk of tilting or jamming due to single-point guidance.

[0092] In one embodiment, refer to Figures 7 to 9 The first end of the fourth link 52 is rotatably connected to the second guide rail 56 around the ninth axis.

[0093] In this embodiment, the second guide rail 56 provides a guiding function for the second slider 57 and also provides a mounting fulcrum for the fourth link 52, so that the first end of the fourth link 52 can be directly connected to an appropriate position on the second guide rail 56 by means of hinge or other means.

[0094] The second guide rail 56 is fixed to the seat frame 2, and has a defined installation position and stable structural rigidity. In this embodiment, by directly connecting the fourth link 52 to the second guide rail 56, there is no need to set up a separate installation point on the seat frame 2. This simplifies the assembly relationship of the entire leg support drive assembly 5, reduces the number of parts and cumulative installation errors, thereby improving the motion accuracy and reliability of the leg support drive assembly 5. It also unifies the installation reference of the fourth link 52 with the motion reference of the second slider 57. At the same time, the integrated design of the fourth link 52 and the second guide rail 56 helps to optimize the spatial layout, making the entire leg support drive assembly 5 more compact.

[0095] In one embodiment, refer to Figure 7 and Figure 10 The leg support drive assembly 5 also includes a seventh link 58 and a U-shaped bracket 59; the U-shaped bracket 59 has a first end 591 and a second end 592, and there is a gap between the first end 591 and the second end 592 in their orthogonal projections on a preset plane, and the preset plane is perpendicular to the eighth axis. The first end of the seventh link 58 is connected to the middle of the third connecting crossbar 55, the second end of the seventh link 58 is connected to the first end 591, and the second end 592 is connected to the drive end 511.

[0096] like Figure 10 As shown, the first end of the seventh link 58 can be connected to the middle of the third connecting crossbar 55 by welding, threaded connection, or other means. The two end portions of the U-shaped bracket 59 constitute the first end 591 and the second end 592, respectively. There is a gap between the first end 591 and the second end 592 in their orthogonal projections on a preset plane perpendicular to the eighth axis; specifically, there is a certain height difference between the first end 591 and the second end 592, with the higher first end 591 connected to the second end of the seventh link 58, and the lower second end 592 connected to the drive end 511.

[0097] Based on the aforementioned transition function of the U-shaped bracket 59, the staggered structure of the first end 591 and the second end 592 can better adapt to the positional difference between the drive end 511 and the third connecting crossbar 55, thereby improving the adaptability of the leg support drive assembly 5 to the assembly space. This ensures that the power output from the drive end 511 can be transmitted sequentially to the third connecting crossbar 55 through the U-shaped bracket 59 and the seventh link 58, thus stably driving the entire leg support drive assembly 5 to move.

[0098] In one embodiment, refer to Figure 7 and Figure 10 The second end of the seventh link 58 is rotatably connected to the first end 591 around the twelfth axis, and the second end 592 is rotatably connected to the drive end 511 around the thirteenth axis; the twelfth and thirteenth axes are parallel to the eighth axis.

[0099] In this embodiment, the first end 591 of the U-shaped bracket 59 can be rotatably connected to the second end of the seventh link 58 around the twelfth axis by means of hinge or the like, and the second end 592 of the U-shaped bracket 59 can be rotatably connected to the drive end 511 around the thirteenth axis by means of hinge or the like; wherein, the twelfth axis and the thirteenth axis can extend along the width direction of the seat.

[0100] During actual operation, there may be certain angular deviations or dynamic changes between the direction of the driving force output by the third drive device 51, the force transmission direction of the U-shaped bracket 59, and the force direction of the seventh link 58. In this embodiment, by setting the seventh link 58, the U-shaped bracket 59, and the drive end 511 to a rotatable connection, the adaptive rotation between the above-mentioned components can be used to effectively absorb the angular deviations between the components during the driving process. This avoids the additional stress and motion interference that are easily generated by rigid connection methods, and makes the transmission chain between the drive end 511, the U-shaped bracket 59, and the seventh link 58 have better motion compliance. It can reduce the occurrence of jamming problems during the driving process, ensure the smooth transmission of driving force, and thus improve the smoothness and reliability of the leg support drive assembly 5.

[0101] In one embodiment, refer to Figures 7 to 9 The third drive device 51 is configured as an electric lead screw.

[0102] In this embodiment, the electric lead screw typically includes a drive motor and a lead screw body; the first end of the lead screw body is connected to the output shaft of the drive motor, and the second end of the lead screw body constitutes the drive end 511. The second end of the lead screw body can be connected to the third gear structure 7 by direct or indirect connection; specifically, the second end of the lead screw body can be connected to the third connecting crossbar 55 in sequence through the U-shaped bracket 59 and the seventh connecting rod 58.

[0103] Based on the above settings, the rotational motion of the drive motor can be converted into the linear motion of the lead screw body, thereby driving the leg support plate 6 to move back and forth along a preset path.

[0104] The electric lead screw has a compact structure and high control precision, which can provide a stable and reliable linear driving force for the leg support drive assembly 5, thereby facilitating precise control of the extension and retraction of the leg support.

[0105] This application also provides a seat assembly; please refer to [link / reference]. Figures 1 to 10 The seat assembly includes a seat body and a seat pan structure assembly as described in any of the above embodiments; the seat pan structure assembly is connected to the seat body.

[0106] In this embodiment, the seat body primarily serves to provide support and enhance comfort. By mounting the seat pan structure assembly onto the seat body, a complete seat assembly can be formed.

[0107] For the specific structure of the seat pan assembly, please refer to the description of the above embodiments. Since the seat assembly in this embodiment adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be repeated here.

[0108] This application also provides a vehicle; please refer to [link / reference]. Figures 1 to 10 The vehicle includes the seat assembly as described in any of the above embodiments.

[0109] In this embodiment, "vehicle" can refer to passenger cars, trucks, etc., and is not limited to any particular type.

[0110] For the specific structure of the seat assembly, please refer to the description of the above embodiments. Since the vehicle in this embodiment adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be repeated here.

[0111] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A seat basin structure assembly, characterized in that, The seat basin structure assembly includes: Base (1); A seat frame (2) is movably connected to the base (1); An angle adjustment component (3) is provided with a fixed part on the base (1) and a movable part of the angle adjustment component (3) is connected to the front side of the seat frame (2). The angle adjustment component (3) is used to drive the front side of the seat frame (2) to swing relative to the rear side of the seat frame (2) in a vertical plane. A lifting drive assembly (4) is provided, the fixed part of which is disposed on the seat cushion frame (2), and the movable part of which is connected to the base (1); the lifting drive assembly (4) is used to drive the seat cushion frame (2) to rise or fall relative to the base (1); The leg support drive assembly (5) has a fixed part located on the front side of the seat cushion frame (2) and a movable part provided with a leg support plate (6). The leg support drive assembly (5) is used to drive the leg support plate (6) to move forward or backward relative to the seat cushion frame (2).

2. The seat basin structure assembly according to claim 1, characterized in that, The tilt adjustment assembly (3) includes a first drive device (31), a first link (32), and a second link (33); the lifting drive assembly (4) includes a second drive device (41) and a third link (42); The first end of the first connecting rod (32) is rotatably connected to the base (1) about a first axis, the first end of the second connecting rod (33) is rotatably connected to the second end of the first connecting rod (32) about a second axis, and the front side of the cushion frame (2) is rotatably connected to the second end of the second connecting rod (33) about a third axis; the fixed part of the first driving device (31) is connected to the first connecting rod (32), and the movable part of the first driving device (31) is connected to the second connecting rod (33); The first end of the third link (42) is rotatably connected to the base (1) around the fourth axis, and the rear side of the seat frame (2) is rotatably connected to the second end of the third link (42) around the fifth axis; the fixed part of the second drive device (41) is connected to the seat frame (2), and the movable part of the second drive device (41) is connected to the third link (42); the first axis, the second axis, the third axis, the fourth axis, and the fifth axis are horizontally arranged in the left-right direction and are parallel to each other.

3. The seat basin structure assembly according to claim 2, characterized in that, The tilt adjustment assembly (3) further includes a first gear structure (34), which is disposed on the second connecting rod (33). The teeth of the first gear structure (34) are arranged around a sixth axis; the sixth axis is parallel to the first axis. The first drive device (31) includes a first drive motor and a first drive gear. The first drive motor is connected to the first drive gear, and the first drive gear meshes with the first gear structure (34) for transmission. The first drive motor is used to drive the first drive gear to rotate, so as to drive the second connecting rod (33) to rotate relative to the first connecting rod (32) through the first gear structure (34).

4. The seat basin structure assembly according to claim 3, characterized in that, The tilt adjustment assembly (3) includes two first drive devices (31), two first connecting rods (32), two second connecting rods (33), and two first gear structures (34) distributed at intervals along the first axis; the tilt adjustment assembly (3) also includes a first connecting crossbar (35), the two ends of the first connecting crossbar (35) are connected one-to-one with the second ends of the two second connecting rods (33), and the front side of the seat frame (2) is rotatably connected to the two ends of the first connecting crossbar (35) around the third axis; And / or, the tilt adjustment component (3) further includes a thickened rack (36); the thickened rack (36) is connected to the first gear structure (34), the teeth of the thickened rack (36) are correspondingly superimposed on the teeth of the first gear structure (34), and the thickened rack (36) meshes with the first drive gear for transmission; And / or, the first gear structure (34) is provided with a first limiting groove (341), the first connecting rod (32) is provided with a first limiting post (321), and the first limiting post (321) is slidably fitted in the first limiting groove (341); when the second connecting rod (33) rotates relative to the first connecting rod (32) to a critical angle, the first limiting post (321) abuts against the end of the first limiting groove (341).

5. The seat basin structure assembly according to claim 2, characterized in that, The lifting drive assembly (4) further includes a second gear structure (43), which is disposed on the third connecting rod (42). The teeth of the second gear structure (43) are arranged around a seventh axis; the seventh axis is parallel to the fourth axis. The second drive device (41) includes a second drive motor and a second drive gear. The second drive motor is connected to the second drive gear, and the second drive gear meshes with the second gear structure (43) for transmission. The second drive motor is used to drive the second drive gear to rotate, so as to drive the seat frame (2) to rotate relative to the third link (42) through the second gear structure (43).

6. The seat basin structure assembly according to claim 5, characterized in that, The lifting drive assembly (4) includes two second drive devices (41) spaced apart along the fourth axis, two third connecting rods (42) and two second gear structures (43); the lifting drive assembly (4) also includes a second connecting crossbar (44), the two ends of the second connecting crossbar (44) being connected one-to-one with the second ends of the two third connecting rods (42), and the rear side of the seat frame (2) being rotatably connected to the two ends of the second connecting crossbar (44) around the fifth axis; And / or, the third link (42) is provided with a second limiting groove (421), and the seat frame (2) is provided with a second limiting post (21), the second limiting post (21) is slidably engaged in the second limiting groove (421); when the seat frame (2) rotates relative to the third link (42) to a critical angle, the second limiting post (21) abuts against the end of the second limiting groove (421).

7. The seat basin structure assembly according to claim 1, characterized in that, The leg support plate (6) is provided with a third gear structure (7), and the teeth of the third gear structure (7) are arranged around the eighth axis; The leg support drive assembly (5) further includes a third drive device (51), a fourth link (52), and a fifth link (53); the drive end (511) of the third drive device (51) is rotatably connected to the third gear structure (7) around the eighth axis; the third drive device (51) is used to drive the leg support plate (6) to move forward or backward; the first end of the fourth link (52) is rotatably connected to the front side of the seat frame (2) around the ninth axis; the first end of the fifth link (53) is rotatably connected to the second end of the fourth link (52) around the tenth axis; the second end of the fifth link (53) is provided with a fourth gear structure (531), the teeth of the fourth gear structure (531) are arranged around the eleventh axis, and the fourth gear structure (531) meshes with the third gear structure (7); the eighth axis, the ninth axis, the tenth axis, and the eleventh axis are horizontally arranged in the left-right direction and are parallel to each other.

8. The seat basin structure assembly according to claim 7, characterized in that, The leg support drive assembly (5) further includes a sixth link (54), the first end of which is rotatably connected to the third gear structure (7) about the eighth axis, and the second end of which is rotatably connected to the fourth gear structure (531) about the eleventh axis. And / or, the leg support drive assembly (5) further includes a third connecting crossbar (55) extending along the eighth axis; the drive end (511) is connected to the middle of the third connecting crossbar (55); the leg support plate (6) is provided with two third gear structures (7), one of which is rotatably connected to the first end of the third connecting crossbar (55) around the eighth axis, and the other of which is rotatably connected to the second end of the third connecting crossbar (55) around the eighth axis.

9. A seat assembly, characterized in that, The seat assembly includes a seat body and a seat pan structure assembly as described in any one of claims 1 to 8; the seat pan structure assembly is connected to the seat body.

10. A vehicle, characterized in that, The vehicle includes the seat assembly as described in claim 9.

Images