Adjustment system and seat

Abstract

The application provides an adjusting system and a seat. The adjusting system comprises a base frame, a seat cushion frame connected with a seat pan, a rear adjusting part connected with the rear side of the seat cushion frame, a transmission element connected with the seat cushion frame, a front supporting part connected with the front side of the seat cushion frame, and the adjusting system has a first state and a second state. In the first state, the front supporting part provides the front side of the seat cushion frame with a first height, and the rear adjusting part provides the rear side of the seat cushion frame with a second height. In the second state, the height of the rear side of the seat cushion frame is reduced from the second height to a minimum second height relative to the first state.

Description

Technical Field

[0001] This application relates to an adjustment system and a seat. Background Technology

[0002] With the development of the automotive industry and the increase in families with multiple children, consumers' demands for cars are becoming more diversified and multifunctional. For example, when the front seats are not occupied, rear passengers may want to enjoy a better view or see the contents of electronic displays such as the dashboard screen, which requires folding the backrests of the front seats forward into the seat cushion.

[0003] In some alternative solutions, the front of the seat cushion frame is driven, thereby moving the entire adjustment system to lower the seat cushion to its lowest height, after which the backrests of the front seats are folded forward and onto the seat cushion.

[0004] The inventors discovered that the structural stability of the above-mentioned drive mechanism for adjusting the front of the seat cushion frame needs further improvement.

[0005] Therefore, there is a need in this field for a new adjustment system and seat that can adjust the seat cushion to its lowest height and fold the seat back forward to its lowest height after the seat cushion is in place, providing good visibility and a sense of space, while ensuring the structural stability of the seat cushion adjustment process. Utility Model Content

[0006] The purpose of this application is to provide a regulation system.

[0007] Another objective of this application is to provide a seat.

[0008] An adjustment system according to a first aspect of this application includes: a base frame for connection to an external environment; a seat frame with a seat basin connected thereto; a rear adjustment portion connected to the rear side of the seat frame, the rear adjustment portion including a transmission element connected to the seat frame; and a front support portion connected to the front side of the seat frame. The adjustment system has a first state and a second state. In the first state, the front support portion provides a first height for the front side of the seat frame, and the rear adjustment portion provides a second height for the rear side of the seat frame. In the second state, relative to the first state, the rear height of the seat frame decreases from the second height to a minimum second height, and the front height of the seat frame decreases from the first height to the minimum first height. The motion transmission path of the adjustment system is configured such that the transmission element is driven to displace the rear side of the seat frame downwards, thereby displacing the front side of the seat frame downwards.

[0009] The technical solution of this application connects the rear adjustment part and the front support part, and the seat cushion frame is connected to both on the front and rear sides in the length direction respectively. The rear adjustment part drives the seat cushion frame to have a dynamic structure that switches between a first state, a second state and between them. The adjustment system enables the seat cushion to be adjusted to the lowest height and the seat back to be folded forward to the lowest height after the seat cushion is in place. While providing good visibility and a sense of space, it also ensures the structural stability of the seat cushion adjustment process.

[0010] In one or more embodiments of the adjustment system, the front support includes a first link, which is hinged to a first connection position and a seat frame; the first link is hinged to the front side of the seat frame at a first position; in the first state, the height of the first position is a first position height, such that the front support provides the front side of the seat frame with a first height; in the second state, relative to the first state, the first link can be driven by the seat frame to rotate forward around the first position, such that the height of the first position decreases from the first position height to a minimum first position height.

[0011] In one or more embodiments of the adjustment system, the transmission element includes a gear component disposed on the rear side of the seat cushion frame; the base frame is provided with a toothed condition, the gear component meshing with the toothed condition, the toothed condition extending in an arc shape from the rear side to the front side downwards; in the second state, when the gear component is driven to rotate by the first driving member, it causes the rear side of the seat cushion frame to move along the extending direction of the toothed condition, so that the height of the rear side of the seat cushion frame decreases from the second height to the minimum second height.

[0012] In one or more embodiments of the adjustment system, the base frame is provided with an arc-shaped groove, the extension direction of the arc-shaped groove is the same as the extension direction of the tooth condition, and the rear side of the seat frame is disposed in the arc-shaped groove by a pin.

[0013] In one or more embodiments of the adjustment system, the transmission element includes a second link, which is hinged to a second connection position and a seat frame; the second link is hinged to the rear side of the seat frame at a second position; in the first state, the second link is locked by a first drive member, and the height of the second position is a second position height, such that the front support provides the rear side of the seat frame with a second height; in the second state, relative to the first state, the second link can be driven by the first drive member to rotate forward about the second connection position, and the height of the second position decreases from the second position height to a minimum second position height, such that the height of the first position decreases from the first position height to a minimum first position height.

[0014] In one or more embodiments of the adjustment system, the first connecting rod and the seat cushion frame are arranged in pairs on both sides of the width direction. The first connecting rods on both sides of the width direction are connected by a first synchronizing rod and a second synchronizing rod. The rear sides of the seat cushion frames on both sides of the width direction are connected by a third synchronizing rod. The front sides of the seat cushion frames on both sides of the width direction are connected to the seat basin. The width of the seat basin is at least the width between the two sides of the seat cushion frames. The first driving member is disposed on one side of the width direction.

[0015] A seat according to a second aspect of this application includes a seat cushion, including the adjustment system described in the first aspect; and a backrest rotatably connected to a base frame of the seat cushion.

[0016] In one or more embodiments of the seat, the backrest and the base frame of the seat cushion are connected at a third position; in the first state, the height of the backrest is a first backrest height; in the second state, compared to the first state, the backrest can rotate forward around the third position so that the height of the backrest decreases to a second backrest height so that the backrest is folded relative to the seat cushion.

[0017] In one or more embodiments of the seat, the base frame is connected to an external slide rail, allowing the base frame to slide relative to the slide rail in the length direction; in a first state, the position of the base frame in the length direction is locked at a first base frame position; in a second state, the base frame is able to move forward in the length direction, causing the base frame to move forward to a second base frame position in the length direction.

[0018] In one or more embodiments of the seat, the slide rail is an electric slide rail, and the drive motor of the electric slide rail is located in the middle of the space in the width direction of the adjustment system.

[0019] The beneficial effects of the above embodiments include, but are not limited to, the use of the adjustment system described in the first aspect, which enables the seat cushion to be adjusted to the lowest height and the seat back to be folded forward to the lowest height after the seat cushion is in place, providing good visibility and a sense of space while ensuring the structural stability of the seat cushion adjustment process. Attached Figure Description

[0020] The above and other features, properties, and advantages of this application will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always denote the same features. It should be noted that these drawings are merely illustrative and are not drawn to scale, and should not be construed as limiting the scope of protection actually claimed by this application, wherein: Figure 1This is a structural schematic diagram of a seat according to one embodiment.

[0021] Figure 2 , Figure 3 This is a schematic diagram of the seat adjustment system and slide rail according to one embodiment.

[0022] Figure 4 This is a schematic diagram of the first state of a seat adjustment system according to an embodiment.

[0023] Figure 5 , Figure 6 This is a schematic diagram of the second state of a seat adjustment system according to an embodiment.

[0024] Figure 7 This is a structural schematic diagram of the first state of the seat adjustment system according to another embodiment.

[0025] Figure 8 This is a structural schematic diagram of the second state of the seat adjustment system according to another embodiment.

[0026] Figure label: 1000-Seat, 1001-Seat cushion, 1002-Backrest, 10021-First backrest height, 10022-Second backrest height, 1003-Slide rail; 10 - Regulation system, 101 - First state, 102 - Second state; 1-Base frame, 11-First connection position, 12-Second connection position, 13-Tooth condition, 14-First base frame position, 15-Second base frame position, 16-Arc groove, 17-Third position; 2-Seat cushion frame, 21-Pin shaft; 3-Sitz bath; 4-Rear adjustment section, 41-Transmission element, 411-Gear component, 42-Second connecting rod, 421-Second position, 4211-Second position height, 4212-Minimum second position height; 5-Rear adjustment section, 51-First connecting rod, 511-First position, 5111-First position height, 5112-Minimum first position height; 61-First driving component, 62-Drive motor; 71-First synchronizing rod, 72-Second synchronizing rod, 73-Third synchronizing rod. Detailed Implementation

[0027] Reference will now be made in detail to various embodiments of this application, examples of which are shown in the accompanying drawings and described below. Although this application will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit this application to those exemplary embodiments. Rather, this application is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents, and other embodiments that may be included within the spirit and scope of this application as defined by the appended claims.

[0028] In the following description, the orientation or positional relationship indicated by the terms "front", "rear" or other directional terms is 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, and is not intended to indicate or imply that the device or component 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 of this application.

[0029] Furthermore, this application uses specific terms to describe its embodiments. For example, "an embodiment" and / or "one embodiment" refers to a particular feature, structure, or characteristic associated with at least one embodiment of this application. Therefore, it should be emphasized and noted that "an embodiment" or "one embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application can be appropriately combined.

[0030] Although the adjustment system disclosed in this application is applicable to car seats, it is not limited thereto. For example, it can be applied to other transportation applications, such as heavy vehicles, railway trains, ships, airplanes, etc. It can also be applied to fixed places, such as massage chairs, meeting rooms, auditoriums, cinemas, office seats, etc. As long as the seat can be adjusted by the adjustment system disclosed in this application.

[0031] refer to Figures 1 to 8As shown, in some embodiments, the seat 1000 may include the adjustment system 10 of the embodiments described in detail below, and a backrest 1002, rotatably connected to the base frame 1 of the seat cushion. For example, this rotatable connection can be achieved via an adjuster. The term "recliner" is similar in meaning to common structures in the art; a motor-driven recliner is generally a stepless adjuster, while a high-speed motor should be configured for quick folding. One side of the core component of the recliner is connected to a movable connector, which is connected to the backrest 1002 to drive the backrest 1002 to rotate. The other side is connected to a fixed connector, which is connected to the base frame 1. The meaning of the core component of the recliner is similar to common understanding in the art, namely, the component in the recliner that enables locking and unlocking functions and adjusts the angle. The core component generally includes a movable disc and a fixed disc. The movable disc can be connected to the movable connector, and the fixed disc can be connected to the fixed connector. The core component can be connected with different connectors to form different angle adjusters to suit seats with different structures.

[0032] refer to Figures 4 to 8 As shown, in some embodiments, the backrest 1002 of the seat 1000 is connected to the base frame 1 of the seat cushion at a third position 17. The seat 1000 can have different states corresponding to the first state 101 and the second state 102 of the adjustment system 10.

[0033] like Figure 4 as well as Figure 7 As shown, in the first state 101, the height of the backrest 1002 is the first backrest height 10021. This state can be referred to as the design state of the seat, that is, the structure of the seat 1000 in the general use scenario of the occupant.

[0034] like Figure 5 , Figure 6 as well as Figure 8 As shown, in the second state 102, compared to the first state 101, the backrest 1002 can rotate forward around the third position 17, causing the backrest height to decrease to the second backrest height 10022, thus folding the backrest 1002 relative to the seat cushion 1001. This state can be referred to as the seat's folded state, meaning that when the seat 1000 is not in use, the backrest 1002 can be folded back as shown. Figure 5 The seat is folded up to the cushion 1001, which can be referred to as the seat's folded state. In some embodiments, the base frame 1 is connected to an external slide rail 1003, allowing the base frame 1 to slide relative to the slide rail 1003 in the longitudinal direction.

[0035] like Figures 5 to 6As shown, in the second state 102, the base frame 1 can move forward in the length direction, moving to the second base frame position 15. This further frees up the space occupied by the seat 1000 when it is not in use. For example, in a car, when the seat 1000 is not in use, it can be folded down and moved forward, allowing rear passengers to enjoy a better view, see the contents of electronic displays such as the instrument panel screen, and gain more usable space. In the first state 101, the base frame 1 is locked in the length direction at the first base frame position 14 to ensure the stability of the seat in the designed state.

[0036] refer to Figure 3 As shown, in some embodiments, the slide rail 1003 is an electric slide rail, and the drive motor 62 of the electric slide rail is located in the middle of the space in the width direction of the adjustment system 10, which makes the structure more compact.

[0037] refer to Figures 1 to 8 As shown, the structure of the adjustment system 10 will be described in detail below.

[0038] An adjustment system 10 includes: a base frame 1, a seat frame 2, a rear adjustment part 4, and a front support part 5.

[0039] The base frame 1 is used for connection to the outside, such as connecting to the slide rail 1003 or directly connecting to the floor of a vehicle or the ground of a fixed location.

[0040] The seat frame 2 is connected to the seat basin 3. The rear side of the seat frame 2 is connected to the rear adjustment part 4. The rear adjustment part 4 includes a transmission element 41, which is connected to the seat frame 2. The front side of the seat frame 2 is connected to the front support part 5.

[0041] The regulating system 10 has Figure 4 or Figure 7 The first state 101 shown Figure 5 as well as Figure 6 or Figure 8 The second state 102 is shown.

[0042] like Figure 4 or Figure 7 As shown, in the first state 101, the front support part 5 provides the front side height of the seat frame 2 as the first height, and the rear adjustment part 4 provides the rear side height of the seat frame 2 as the second height. In the first state 101, the height is generally unchanged, but different occupants can adjust the first height and the second height of the first state according to the occupant's body posture and then maintain them.

[0043] In the second state 102, relative to the first state 101, the rear height of the seat frame 2 is reduced from the second height to the minimum second height, and the front height of the seat frame 2 is reduced from the first height to the minimum first height; the motion transmission path of the adjustment system 10 is configured such that the transmission element 41 is driven, causing the rear side of the seat frame 2 to move downward, thereby causing the front side of the seat frame 2 to move downward.

[0044] The beneficial effects of the above embodiments include, but are not limited to, the rear adjustment part and the front support part, and the seat cushion frame being connected to both on the front and rear sides in the length direction respectively, and the seat cushion frame having a dynamic structure that switches between a first state, a second state and between, driven by the rear adjustment part, while providing good visibility and a sense of space, and ensuring the structural stability of the seat cushion adjustment process, the seat cushion can be adjusted to the lowest height and the seat back can be folded forward to the lowest height after the seat cushion is adjusted through the adjustment system.

[0045] Continue to refer to Figures 2 to 8 Especially Figure 2 as well as Figure 3 As shown, in some embodiments, the front support portion 5 includes a first connecting rod 51, which is hinged to a first connection position 11 and a seat frame 2; the first connecting rod 51 is hinged to the front side of the seat frame 2 at a first position 511. The first connection position 11 may be located on the base frame 1.

[0046] In the first state 101, the height of the first position 511 is the first position height 5111, such that the front support 5 provides the front side height of the seat frame 2 as the first height.

[0047] In the second state 102, relative to the first state 101, the first link 51 can be driven by the seat frame 2 to rotate forward around the first position 511, so that the height of the first position 511 is reduced from the first position height 5111 to the minimum first position height 5112.

[0048] The front support part 5 adopts a linkage structure, which is simple, stable and reliable, and easy to design and assemble.

[0049] refer to Figures 2 to 6 As shown, in some embodiments, the specific structure of the rear drive, that is, the specific structure of the transmission element 41, may be that the transmission element 41 includes a gear element 411, which is disposed on the rear side of the seat frame 2; the base frame 1 is provided with a tooth condition 13, the gear element 411 meshes with the tooth condition 13, and the extension direction of the tooth condition 13 is an arc shape that extends from the rear side to the front side downwards.

[0050] In the second state 102, when the gear 411 is driven to rotate by the first drive 61, the rear side of the seat frame 2 moves along the extension direction of the gear condition 13, so that the height of the rear side of the seat frame 2 is reduced from the second height to the minimum second height.

[0051] The rack and pinion drive structure occupies less space, such as Figure 2 as well as Figure 3 As shown, the gear condition 13 can be integrated within the space occupied by the base frame 1, and the space occupied by the gear component 411 is also relatively small, making it particularly suitable for scenarios with high compactness requirements.

[0052] The motion transmission path of the adjustment system 10 is as follows: In the second state, the first driving member 61 drives the gear member 411 to rotate, and the gear member 411 moves along the extension direction of the tooth condition 13, which drives the seat frame 2 connected to the gear member 411 to move along the extension direction of the tooth condition 13. This causes the rear side of the seat frame 2 to be driven to move along an arc from the rear side to the front side to the minimum height position, which in turn drives the first connecting rod 51 connected to the front side of the seat frame 2 to rotate forward around the first position 511, so that the height of the first position 511 is reduced from the first position height 5111 to the minimum first position height 5112.

[0053] Continue to refer to Figure 2 as well as Figure 3 As shown, the base frame 1 is provided with an arc-shaped groove 16, the extension direction of which is the same as the extension direction of the gear condition 13. The rear side of the seat frame 2 is set in the arc-shaped groove 16 via a pin 21. By using a structure in which the pin 21 is set in the arc-shaped groove 16, the arc-shaped groove 16 provides a movement track for the pin 21, guiding and limiting the displacement of the seat frame 2. This can reduce vibration during the meshing movement of the gear 411 and the gear condition 13, further improve the smoothness of movement during the adjustment stroke, and reduce noise.

[0054] refer to Figure 7 as well as Figure 8 As shown, in some embodiments, with Figures 2 to 6 Compared to the embodiments shown, Figure 7 as well as Figure 8 The base frame 1, seat frame 2, and front support 5 of the embodiment shown are substantially the same in structure. The main difference is that the specific structure of the rear drive is different. That is, the specific structure of the transmission element 41 can be that the transmission element 41 includes a second link 42, which is hinged to the second connection position 12 and the seat frame 2 respectively. The second link 42 is hinged to the rear side of the seat frame 2 at the second position 421. The second connection position 12 can be located on the base frame 1.

[0055] In the first state 101, the second link 42 is locked by the first drive member 61, and the height of the second position 421 is the second position height 4211, so that the front support 5 provides the rear side height of the seat frame 2 as the second height.

[0056] In the second state 102, relative to the first state 101, the second link 42 can be driven by the first drive member 61 to rotate forward around the second position 421. The height of the second position 421 is the minimum second position height 4212, so that the height of the first position 511 is reduced from the first position height 5111 to the minimum first position height 5112.

[0057] The transmission component 41 adopts a connecting rod structure, which is simple, stable and reliable, and easy to design and assemble.

[0058] The motion transmission path of the adjustment system 10 is as follows: In the second state, the first drive member 61 can be a lead screw motor, which drives the second connecting rod 42 to rotate forward around the second connection position 12, thereby causing the second position 421 to rotate forward and the seat frame 2 connected thereto to rotate forward, so that the height decreases from the second position height 4211 to the minimum second position height 4212, and the height of the first position 511 decreases from the first position height 5111 to the minimum first position height 5112.

[0059] It can be understood that the second state can be the endpoint of the adjustment stroke of the adjustment unit of the adjustment system, or the adjustment system can be in an intermediate state between the first state and the second state.

[0060] Continue to refer to Figures 2 to 3 As shown, the first connecting rod 51 and the seat frame 2 are arranged in pairs on both sides of the width direction. The first connecting rod 51 on both sides of the width direction is connected by the first synchronizing rod 71 and the second synchronizing connecting rod 72. The rear sides of the seat frame 2 on both sides of the width direction are connected by the third synchronizing rod 73. The structure of connecting the two sides of the width direction by synchronizing rods is relatively stable and reliable.

[0061] The front sides of the seat cushion frames 2 on both sides in the width direction are connected to the seat basin 3, and the width of the seat basin 3 is at least the width between the two seat cushion frames 2. This makes the seat basin 3 wider, providing a more stable and comfortable user experience.

[0062] The first driving member 61 is located on one side in the width direction, and its structure is further compact.

[0063] The first driving component 61 can be a motor, which can be a brushed motor, a brushless motor, etc. The term "motor" here should be interpreted broadly, meaning it can refer to a standalone motor or a motor assembly consisting of a motor and gears, similar to the common concept of a "geared motor" or "screw motor," etc., without limitation. Furthermore, the driving component for outputting linear motion can also be a cylinder, a hydraulic cylinder, an electric cylinder, etc. The meaning of the drive motor 62 is similar to the above-described scope of the motor, and will not be elaborated further here.

[0064] In summary, the beneficial effects of the adjustment system and seat described in the above embodiments include, but are not limited to, the rear adjustment part and the front support part being connected to the seat cushion frame on the front and rear sides in the length direction respectively, and the seat cushion frame having a dynamic structure that switches between a first state, a second state and between through the drive of the rear adjustment part, while providing good visibility and a sense of space, ensuring the structural stability of the seat cushion adjustment process, and realizing the adjustment of the seat cushion to the lowest height and the folding of the seat back to the lowest height after the seat cushion is folded forward through the adjustment system.

[0065] While this application discloses preferred embodiments as described above, it is not intended to limit the scope of this application. Any changes and modifications can be made by those skilled in the art without departing from the spirit and scope of this application. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the content of the technical solution of this application shall fall within the protection scope defined by the claims of this application.

Claims

1. A regulating system (10), characterized in that, include: The base frame (1) is used for connection with the outside; A seat frame (2) is connected to a seat basin (3); The rear adjustment part (4) is connected to the rear side of the seat frame (2). The rear adjustment part (4) includes a transmission element (41) which is connected to the seat frame (2). The front support part (5) is connected to the front side of the seat frame (2); The regulating system (10) has a first state (101) and a second state (102); In the first state (101), the front support (5) provides the front height of the seat frame (2) as a first height, and the rear adjustment (4) provides the rear height of the seat frame (2) as a second height; In the second state (102), relative to the first state (101), the rear height of the seat frame (2) is reduced from the second height to the minimum second height, and the front height of the seat frame (2) is reduced from the first height to the minimum first height; the motion transmission path of the adjustment system (10) is configured such that the transmission element (41) is driven to move the rear side of the seat frame (2) downward, thereby moving the front side of the seat frame (2) downward.

2. The regulating system (10) as described in claim 1, characterized in that, The front support (5) includes a first connecting rod (51), which is hinged to a first connection position (11) and a seat frame (2); the first connecting rod (51) is hinged to the front side of the seat frame (2) at a first position (511). In the first state (101), the height of the first position (511) is the first position height (5111), such that the front support (5) provides the front side height of the seat frame (2) as the first height; In the second state (102), relative to the first state (101), the first link (51) can be driven by the seat frame (2) to rotate forward about the first position (511), so that the height of the first position (511) is reduced from the first position height (5111) to the minimum first position height (5112).

3. The regulating system (10) as described in claim 2, characterized in that, The transmission element (41) includes a gear (411) which is disposed on the rear side of the seat frame (2); the base frame (1) is provided with a tooth condition (13), the gear (411) meshes with the tooth condition (13), and the tooth condition (13) extends in an arc shape from the rear side to the front side with a downward height. In the second state (102), when the gear (411) is driven to rotate by the first drive (61), the rear side of the seat frame (2) moves along the extension direction of the tooth condition (13), so that the height of the rear side of the seat frame (2) is reduced from the second height to the minimum second height.

4. The regulating system (10) as described in claim 3, characterized in that, The base frame (1) is provided with an arc groove (16), the extension direction of the arc groove (16) is the same as the extension direction of the tooth condition (13), and the rear side of the cushion frame (2) is provided in the arc groove (16) by a pin (21).

5. The regulating system (10) as described in claim 2, characterized in that, The transmission element (41) includes a second link (42), which is hinged to the second connection position (12) and the seat frame (2) respectively; the second link (42) is hinged to the rear side of the seat frame (2) at the second position (421); In the first state (101), the second link (42) is locked by the first drive member (61), and the height of the second position (421) is the second position height (4211), so that the front support (5) provides the rear side height of the seat frame (2) as the second height; In the second state (102), relative to the first state (101), the second link (42) can be driven by the first drive member (61) to rotate forward about the second connection position (12), and the height of the second position (421) is reduced from the second position height (4211) to the minimum second position height (4212), so that the height of the first position (511) is reduced from the first position height (5111) to the minimum first position height (5112).

6. The regulating system (10) as described in claim 3 or 5, characterized in that, The first connecting rod (51) and the seat frame (2) are arranged in pairs on both sides of the width direction. The first connecting rod (51) on both sides of the width direction is connected by the first synchronizing rod (71) and the second synchronizing connecting rod (72). The rear side of the seat frame (2) on both sides of the width direction is connected by the third synchronizing rod (73). The front side of the seat frame (2) on both sides of the width direction is connected to the seat basin (3). The width of the seat basin (3) is at least the width between the two seat frames (2). The first driving member (61) is arranged on one side of the width direction.

7. A seat (1000), characterized in that, include: The seat cushion (1001) includes the adjustment system (10) as described in any one of claims 1-6. as well as The backrest (1002) is rotatably connected to the base frame (1) of the seat cushion.

8. The seat (1000) as claimed in claim 7, characterized in that, The backrest (1002) is connected to the base frame (1) of the seat cushion at the third position (17); In the first state (101), the height of the backrest (1002) is the first backrest height (10021). In the second state (102), compared to the first state (101), the backrest (1002) can rotate forward around the third position (17) so that the height of the backrest decreases to the second backrest height (10022) so that the backrest (1002) is folded relative to the seat cushion (1001).

9. The seat (1000) as claimed in claim 7, characterized in that, The base frame (1) is used to connect with an external slide rail (1003) so that the base frame (1) can slide relative to the slide rail (1003) in the length direction. In the first state (101), the position of the base frame (1) in the length direction is locked as the first base frame position (14). In the second state (102), the base frame (1) is able to move forward in the length direction, so that the base frame (1) moves forward in the length direction to the second base frame position (15).

10. The seat (1000) as claimed in claim 9, characterized in that, The slide rail (1003) is an electric slide rail, and the drive motor (62) of the electric slide rail is located in the middle of the space in the width direction of the adjustment system (10).

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