Seat chassis assembly and seat

Abstract

The utility model discloses a seat chassis assembly and a seat. The seat chassis assembly comprises a chassis; the rotating shaft assembly comprises a rotating shaft and a stopping piece, the stopping piece is fixed to the rotating shaft and provided with a plurality of gear teeth, the rotating shaft is rotatably connected to the chassis, and the rotating shaft assembly and the chair back assembly rotate synchronously; the gear part is rotatably arranged on the chassis and is provided with a plurality of gears, the gear part is provided with a plurality of gear blocks arranged in the circumferential direction of the gear part, and the gear blocks correspond to the gear teeth one to one; the driving assembly is used for driving the gear piece to rotate relative to the chassis; when the driving assembly drives the gear piece to rotate to different gears, the gear piece stops the corresponding gear teeth through the different gear blocks so as to limit the maximum rotating angle of the rotating shaft. According to the seat chassis assembly, the driving assembly drives the gear piece to rotate, different gear blocks are used for stopping different gear teeth, the maximum rotating angle of a seat back can be adjusted, the matching structure of the gear teeth and the gear blocks is simple, and matching is more stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of seat technology, and in particular to a seat chassis assembly and a seat. Background Technology

[0002] In related technologies, the seat back can typically be tilted back relative to the chassis. When the seat back is tilted back and unlocked, the seat back can be tilted back and adjusted when the user pushes it back to adapt to different user habits, thereby improving user comfort.

[0003] Some seats have springs in the chassis. As the backrest recline angle increases, the spring force also increases. This conflicts with the fact that the force the user can exert decreases as the backrest reclines. In other words, the adjustment effect is poor when the backrest reclines at a large angle. Other seats have a recline adjustment mechanism to control the maximum recline angle of the seat through different recline positions. However, the recline adjustment mechanism in this technology is relatively complex, making it inconvenient to switch between positions and resulting in poor stability of the position coordination. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of this utility model is to provide a seat chassis assembly that can drive a gear shifting component to rotate via a drive assembly, thereby using different gear shifting blocks to stop different gear shifting teeth, and thus adjusting the maximum rotation angle of the seat back. Furthermore, the engagement structure between the gear shifting teeth and the gear shifting blocks is simple, and the engagement is more stable and reliable.

[0005] This utility model also proposes a seat having the above-mentioned seat chassis assembly.

[0006] To achieve the above objectives, a seat chassis assembly is provided according to a first aspect of the present invention, comprising: a chassis; a pivot assembly, the pivot assembly including a pivot and a stop member, the stop member being fixed relative to the pivot and having multiple stop teeth, the pivot being rotatably connected to the chassis and extending along the left-right direction of the chassis, the pivot assembly being adapted to be connected to a seat back assembly and rotating synchronously with the seat back assembly; and a stop member, the stop member being rotatably disposed on the chassis and having multiple switchable stops, the stop member being provided with a stop tooth along its... A plurality of circumferentially arranged gear shift blocks, each gear shift block corresponding to a plurality of gear positions, and each gear shift block corresponding to a plurality of gear teeth; a drive assembly, rotatably connected to the chassis, and drivingly connected to the gear shift member, the drive assembly being used to drive the gear shift member to rotate relative to the chassis; wherein, when the drive assembly drives the gear shift member to rotate to different gear positions, the gear shift member stops the corresponding gear teeth through different gear shift blocks, thereby limiting the maximum rotation angle of the rotating shaft relative to the chassis.

[0007] Thus, the seat chassis assembly according to this utility model embodiment can drive the gear shift component to rotate through the drive component, so as to use different gear shift blocks to stop different gear shift teeth, thereby adjusting the maximum rotation angle of the seat back. Moreover, the cooperation structure between the gear shift teeth and the gear shift blocks is simple and the cooperation is more stable and reliable.

[0008] According to some embodiments of this utility model, along the radial direction of the rotating shaft, the maximum distance between the stop tooth and the central axis of the rotating shaft is the height of the stop tooth. Multiple stop teeth are arranged circumferentially along the stop member and move away from the chassis in the vertical direction, with the height of the multiple stop teeth increasing sequentially. Also, along the radial direction of the stop member, the distance between the radial outer side of the stop block and the central axis of the stop member is the radius of the stop block. The stop block extends in a fan shape along the circumferential direction of the stop member, with adjacent stop blocks connected to each other. Along the circumferential direction of the stop member, the radii of the multiple stop blocks decrease sequentially. When the stop member is in different gear positions, the stop member stops stop teeth of different heights via stop blocks of different radii.

[0009] According to some embodiments of the present invention, the gear shifting component further includes: a plurality of gear shifting adjustment blocks, the plurality of gear shifting adjustment blocks being disposed on one axial side of the gear shifting block, the plurality of gear shifting adjustment blocks being arranged circumferentially along the gear shifting component, and the outer diameter of each gear shifting block gradually increasing along the circumferential direction of the gear shifting component, and a stop step being formed at one end of each gear shifting block; wherein, when the stop member is in different gear positions, the driving assembly abuts against the stop steps of different gear shifting blocks.

[0010] According to some embodiments of the present invention, the driving component includes: a driving member, one end of which is rotatably connected to the chassis; and a driven member, one end of which is rotatably connected to the other end of the driving member, and the other end of which abuts against the stop step.

[0011] According to some embodiments of the present invention, the driving assembly further includes: a first elastic reset member, which is disposed between the driving member and the chassis, and is connected to both the driving member and the chassis, so as to generate an elastic force that drives the driving member to rotate counterclockwise relative to the chassis when the driving member rotates clockwise relative to the chassis; and a second elastic reset member, which is disposed between the driving member and the driven member, and is connected to both the driving member and the driven member, so as to generate an elastic force that drives the driven member to rotate counterclockwise relative to the driving member when the driven member rotates clockwise relative to the driving member.

[0012] According to some embodiments of the present invention, the drive assembly further includes: a pull rope, one end of which is connected to an anti-detachment component, the anti-detachment component being rotatably connected to the other end of the drive component; and a pull rope protection tube, which is fixed to the chassis, the pull rope being movably inserted through the pull rope protection tube, and the other end of the pull rope extending from the chassis.

[0013] According to some embodiments of the present invention, the chassis is provided with a fixed column, and the stop member and the driving member are rotatably sleeved on the fixed column, with the stop member located above the driving member.

[0014] According to some embodiments of the present invention, the seat chassis assembly further includes: a connector, the connector being connected to the fixing column and stopping on the side of the stop member facing away from the chassis.

[0015] According to some embodiments of the present invention, the seat chassis assembly further includes: a limiting member, the limiting member being rotatably connected to the chassis, the limiting member and the driving assembly being disposed on the radial sides of the gear shift member, and the limiting member and the driving assembly respectively abutting against the stop steps of different gear shift adjustment blocks.

[0016] According to some embodiments of the present invention, the seat chassis assembly further includes: a third elastic reset member, the third elastic reset member being disposed between the limiting member and the chassis, and the third elastic reset member being connected to the limiting member and the chassis respectively, so as to generate an elastic force that drives the limiting member to rotate counterclockwise relative to the chassis when the limiting member rotates clockwise relative to the chassis.

[0017] A seat is provided according to a second aspect of the present invention, the seat comprising: a seat leg; a seat chassis assembly according to a first aspect of the present invention, the seat chassis assembly being connected to the seat leg; a seat cushion assembly disposed above and connected to the seat chassis assembly; and a seat back assembly rotatably connected to the seat chassis assembly.

[0018] According to the second aspect of the present invention, the seat, by utilizing the seat chassis assembly according to the first aspect of the present invention, can drive the gear shifting component to rotate via the drive assembly, so as to use different gear shifting blocks to stop different gear shifting teeth, thereby adjusting the maximum rotation angle of the seat back. Moreover, the cooperation structure between the gear shifting teeth and the gear shifting blocks is simple and the cooperation is more stable and reliable.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a structural schematic diagram of the seat chassis assembly according to an embodiment of the present utility model;

[0022] Figure 2 This is a cross-sectional view of the seat chassis assembly according to an embodiment of the present utility model;

[0023] Figure 3 This is an exploded view of the seat chassis assembly according to an embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram illustrating the cooperation of the stop, stop, drive assembly, and limiter according to an embodiment of the present utility model.

[0025] Figure 5 This is a structural schematic diagram of the pivot assembly of the seat chassis assembly according to an embodiment of the present utility model;

[0026] Figure 6 This is a structural schematic diagram of the gear shift component of the seat chassis assembly according to an embodiment of the present utility model;

[0027] Figure 7 This is a structural schematic diagram of the gear shift component of the seat chassis assembly according to another perspective of an embodiment of the present utility model.

[0028] Figure label:

[0029] 1. Seat chassis assembly;

[0030] 100. Chassis; 110. Fixing column; 120. Connecting parts;

[0031] 200. Shaft assembly; 210. Shaft; 220. Stop; 221. Gear;

[0032] 300. Gear shifting component; 310. Gear shifting block; 320. Gear shifting adjustment block; 321. Stop step;

[0033] 400. Drive assembly; 410. Driving component; 420. Driven component; 430. First elastic reset component; 440. Second elastic reset component; 450. Pull rope; 451. Anti-detachment component; 460. Pull rope protection tube;

[0034] 500, Limiting component; 510, Third elastic reset component. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0037] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0038] In the description of this utility model, "multiple" means two or more, and "several" means one or more.

[0039] The seat chassis assembly 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0040] like Figures 1-7As shown in the attached diagram, the front-back direction refers to the front-back direction of the seat, the left-right direction refers to the left-right direction of the seat, and the front-back direction refers to the front-back direction of the seat.

[0041] According to an embodiment of the present utility model, the seat chassis assembly 1 includes a chassis 100, a pivot assembly 200, a gear shifter 300, and a drive assembly 400.

[0042] The pivot assembly 200 includes a pivot 210 and a stop 220. The stop 220 is fixed relative to the pivot 210 and has multiple stop teeth 221. The pivot 210 is rotatably connected to the chassis 100 and extends along the left and right direction of the chassis 100. The pivot assembly 200 is adapted to be connected to the backrest assembly and rotate synchronously with the backrest assembly. The stop member 300 is rotatably disposed on the chassis 100 and has multiple switchable positions. The stop member 300 has multiple stop blocks 310 arranged circumferentially thereon. The multiple stop blocks 310 correspond one-to-one with the multiple positions, and the multiple stop blocks 310 correspond one-to-one with the multiple stop teeth 221. The drive assembly 400 is rotatably connected to the chassis 100 and is drively connected to the stop member 300. The drive assembly 400 is used to drive the stop member 300 to rotate relative to the chassis 100.

[0043] When the drive assembly 400 drives the gear shifting component 300 to different gears, the gear shifting component 300 stops the corresponding gear teeth 221 through different gear shifting blocks 310, thereby limiting the maximum rotation angle of the rotating shaft 210 relative to the chassis 100. It can be understood that since the rotating shaft 210 rotates synchronously with the backrest assembly, limiting the maximum rotation angle of the rotating shaft 210 relative to the chassis 100 limits the maximum rotation angle of the backrest assembly relative to the chassis 100, and consequently limits the maximum reclining angle of the backrest.

[0044] For example, the cross-sectional shape of the rotating shaft 210 can be non-circular, and the stop member 220 can be constructed with a non-circular hole that is adapted to the rotating shaft 210. The stop member 220 is sleeved on the rotating shaft 210 through the non-circular hole, so that the stop member 220 and the rotating shaft 210 can rotate synchronously.

[0045] According to the seat chassis assembly 1 of this utility model embodiment, a rotating shaft 210 is rotatably connected to the chassis 100 and extends along the left-right direction of the chassis 100. The rotating shaft assembly 200 is connected to the backrest assembly and rotates synchronously with the backrest assembly. The stop member 220 is fixed relative to the rotating shaft 210. With this configuration, the stop member 220 can rotate synchronously with the rotating shaft 210. When the backrest assembly rotates backward (i.e., the backrest tilts back), the backrest can drive the stop member 220 to rotate synchronously relative to the chassis 100 through the rotating shaft 210.

[0046] In addition, the gear shifter 300 is rotatably mounted on the chassis 100 and has multiple switchable gears. The gear shifter 300 is provided with multiple gear blocks 310 arranged circumferentially thereon. The multiple gear blocks 310 correspond one-to-one with the multiple gears, and the multiple gear blocks 310 correspond one-to-one with the multiple gear teeth 221. In other words, when the shifting component 300 rotates to one angle relative to the chassis 100, it can switch to a shifting position. At this time, the shifting component 300 can use the shifting block 310 corresponding to the shifting position to stop a shifting tooth 221, thereby limiting the maximum rotation angle of the stop 220, that is, limiting the maximum rotation angle of the rotating shaft 210 relative to the chassis 100. When the shifting component 300 rotates to another angle relative to the chassis 100, it can switch to another shifting position. At this time, the shifting component 300 can use the shifting block 310 corresponding to the shifting position to stop another shifting tooth 221, thereby limiting the maximum rotation angle of the stop 220 again. That is, the maximum rotation angle of the rotating shaft 210 relative to the chassis 100 can be adjusted, thereby achieving the adjustment of the maximum angle of the seat back recline.

[0047] Therefore, by switching the gear selector 300 to different gears, the maximum reclining angle of the chair back assembly can be adjusted. That is, when the user needs to adjust the reclining angle of the chair back to a smaller position, the gear selector 300 can be switched to the gear corresponding to the smaller reclining angle; while when the user needs to adjust the reclining angle of the chair back to a larger position, the gear selector 300 can be switched to the gear corresponding to the larger reclining angle, thereby meeting the different needs of the user.

[0048] Furthermore, when the shifting component 300 is in different positions, it can be engaged with the shifting block 310 and the shifting tooth 221. This not only simplifies the engagement structure between the shifting component 300 and the shifting block 310, but also makes the engagement between the shifting component 300 and the shifting block 310 more stable and reliable, thereby enabling stable adjustment of the maximum reclining angle of the chair back assembly.

[0049] In addition, the drive assembly 400 is rotatably connected to the chassis 100 and is connected to the gear shift member 300. The drive assembly 400 is used to drive the gear shift member 300 to rotate relative to the chassis 100. In this way, the user can actively adjust the gear of the gear shift member 300 by controlling the drive assembly 400, thereby actively controlling the maximum reclining angle of the backrest assembly and providing a better user experience.

[0050] Thus, according to the embodiment of the present utility model, the seat chassis assembly 1 can drive the gear shift member 300 to rotate through the drive component 400, so as to use different gear shift blocks 310 to stop different gear shift teeth 221, thereby adjusting the maximum rotation angle of the seat back. Moreover, the cooperation structure between the gear shift teeth 221 and the gear shift block 310 is simple and the cooperation is more stable and reliable.

[0051] In some specific embodiments of this utility model, such as Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, along the radial direction of the rotating shaft 210, the maximum distance between the stop tooth 221 and the central axis of the rotating shaft 210 is the height of the stop tooth 221. Multiple stop teeth 221 are arranged circumferentially along the stop member 220 and move away from the chassis 100 in the vertical direction. The height of the multiple stop teeth 221 increases sequentially.

[0052] Furthermore, along the radial direction of the shift member 300, the distance between the radial outer side of the shift block 310 and the central axis of the shift member 300 is the radius of the shift block 310. The shift block 310 extends in a fan shape along the circumference of the shift member 300, and two adjacent shift blocks 310 are connected to each other. Along the circumferential direction of the shift member 300, the radii of multiple shift blocks 310 decrease sequentially.

[0053] When the gear shifter 300 is in different gears, the gear shifter 300 stops the gear teeth 221 of different heights through the gear shift blocks 310 of different radii.

[0054] Specifically, the rotating shaft assembly 200 can be located on the front side of the stop member 300, and the stop member 220 has a stop tooth 221 on the rear side, with the height of the multiple stop teeth 221 increasing sequentially from bottom to top. That is to say, the height of the stop tooth 221 that is closer to the top is greater.

[0055] With this configuration, when the drive assembly 400 drives the gear shifter 300 to switch to a gear, the gear shifter block 310 corresponding to that gear can rotate to the side close to the stop member 220. When a gear shifter tooth 221 abuts against the gear shifter block 310, the stop member 220 can no longer rotate, thereby limiting the maximum rotation angle of the stop member 220 and thus limiting the maximum reclining angle of the chair back.

[0056] When the drive assembly 400 drives the gear shifter 300 to another gear, for example, when the drive assembly 400 drives the gear shifter 300 to rotate clockwise, the gear shifter block 310 corresponding to the other gear rotates to the side closer to the stop member 220. The radius of the gear shifter block 310 decreases, and correspondingly, the gear shifter tooth 221 with a smaller height will not be stopped by the gear shifter block 310. The stop member 220 can continue to rotate until one of the gear shifter teeth 221 comes into contact with the stop member 220. Then the stop member 220 can no longer continue to rotate, thereby realizing the adjustment of the maximum reclining angle of the chair back to adapt to different user needs.

[0057] Therefore, when the shifting component 300 rotates, the shifting positions of the shifting component 300 can be switched sequentially, and the radii of the multiple shifting blocks 310 decrease sequentially, which means that the maximum reclining angle of the chair back assembly can be adjusted step by step without skipping adjustment levels, making the structural design more reasonable.

[0058] In addition, it should be noted that when the user does not squeeze the backrest, the backrest is in its initial state, or when the pressure on the backrest is small, the stop tooth 221 of the stop 220 is separated from the stop block 310 of the stop 300. That is, the stop 220 will not prevent the stop 300 from switching gears, and the gear adjustment of the stop 300 is more convenient.

[0059] In some specific embodiments of this utility model, such as Figure 6 and Figure 7 As shown, the gear shifting component 300 also includes a plurality of gear shifting adjustment blocks 320. For example, there can be four gear shifting adjustment blocks 320, which are arranged circumferentially along the gear shifting component 300.

[0060] Multiple gear adjustment blocks 320 are disposed on one axial side of the gear block 310, for example, they can be disposed on the lower side of the gear block 310. The multiple gear adjustment blocks 320 are arranged circumferentially along the gear member 300, and along the circumferential direction of the gear member 300, the outer diameter of each gear adjustment block 320 gradually increases, and one end of the gear adjustment block 320 forms a stop step 321.

[0061] When the stop member 220 is in different gears, the drive assembly 400 abuts against the stop step 321 of the different gear adjustment block 320.

[0062] The multiple gear adjustment blocks 320 can have the same shape.

[0063] With this configuration, when the stop member 220 is in a certain gear position, the drive assembly 400 can abut against the stop step 321 of the gear adjustment block 320 corresponding to that gear position. At this time, the stop member 220 will not continue to rotate, thus preventing the stop member 220 from actively switching gears. Furthermore, along the circumferential direction of the gear member 300, the outer diameter of each gear adjustment block 320 gradually increases. In this way, the drive assembly 400 can slide along the outer circumference of the gear adjustment block 320 to another stop step 321 to facilitate gear switching.

[0064] In some specific embodiments of this utility model, such as Figure 3 and Figure 4 As shown, the drive assembly 400 includes a driving member 410 and a driven member 420.

[0065] One end of the driving member 410 is rotatably connected to the chassis 100, and one end of the driven member 420 is rotatably connected to the other end of the driving member 410, with the other end of the driven member 420 abutting against the stop step 321. In this way, the driving member 410 can drive the driven member 420 to rotate around the rotation axis of the driving member 410, so that the driven member 420 can move from the stop step 321 of one gear adjustment block 320 to abut against the stop step 321 of another gear adjustment block 320, thereby pushing the gear member 300 to rotate to adjust the gear position of the gear member 300.

[0066] Furthermore, such as Figure 3 As shown, the drive assembly 400 also includes a first elastic reset member 430. The first elastic reset member 430 can be a torsion spring.

[0067] The first elastic reset member 430 is disposed between the active member 410 and the chassis 100, and the first elastic reset member 430 is connected to the active member 410 and the chassis 100 respectively, so as to generate an elastic force that drives the active member 410 to rotate counterclockwise relative to the chassis 100 when the active member 410 rotates clockwise relative to the chassis 100.

[0068] For example, when it is necessary to switch the gear position of the gear position 300, the driving member 410 can first rotate clockwise. When the driving member 410 drives the driven member 420 to move from the stop step 321 of one gear position adjustment block 320 to stop with the stop step 321 of another gear position adjustment block 320, the driving member 410 is released. At this time, the first elastic reset member 430 can drive the driving member 410 to rotate counterclockwise to reset. During the rotation reset process of the driving member 410, the driven member 420 can push the gear position 300 to rotate counterclockwise, thereby switching to the next gear position. This allows the gear position 300 to stop the stop member 220 through another gear position block 310, thereby adjusting the maximum angle of the seat back recline.

[0069] In addition, such as Figure 3 As shown, the drive assembly 400 also includes a second elastic reset member 440. The second elastic reset member 440 can be a torsion spring.

[0070] The second elastic reset member 440 is disposed between the driving member 410 and the driven member 420, and the second elastic reset member 440 is connected to the driving member 410 and the driven member 420 respectively, so as to generate an elastic force that drives the driven member 420 to rotate counterclockwise relative to the driving member 410 when the driven member 420 rotates clockwise relative to the driving member 410.

[0071] It is understandable that when the driving member 410 rotates clockwise, the other end of the driven member 420 will slide along the outer peripheral surface of the gear adjustment block 320. That is, the driven member 420 will rotate clockwise around the other end of the driving member 410. When the first elastic reset drives the driving member 410 to rotate counterclockwise to reset, the second elastic member can also drive the driven member 420 to rotate clockwise around the other end of the driving member 410 to reset.

[0072] In some specific embodiments of this utility model, such as Figures 1-3 As shown, the drive assembly 400 also includes a pull rope 450, one end of which is connected to an anti-detachment member 451, which is rotatably connected to the other end of the drive member 410, and the other end of the pull rope 450 extends from the chassis 100.

[0073] With this configuration, one end of the pull rope 450 can be connected to the driving member 410 via the anti-detachment component 451, for example, through a rotatable connection, thereby preventing the pull rope 450 from separating from the driving member 410. The other end of the pull rope 450 can extend from the chassis 100, making it convenient for the user to actively drive the driving member 410 to rotate by pulling the other end of the pull rope 450. This allows the user to actively switch the gears of the gear shift component 300, making it easier for the user to adjust the maximum reclining angle of the chair back and making operation more convenient.

[0074] Furthermore, such as Figure 2 and Figure 3 As shown, the drive assembly 400 also includes a pull cord protection tube 460.

[0075] The pull cord protection tube 460 is fixed to the chassis 100, and the pull cord 450 is movably threaded through the pull cord protection tube 460, with the other end of the pull cord 450 extending from the chassis 100. This avoids positional interference between the pull cord 450 and other components of the seat chassis assembly 1, and the pull cord protection tube 460 can be configured to provide space for the pull cord 450 to pass through, resulting in less friction when the pull cord 450 is pulled, making it easier for the user to pull the drive component 410 via the pull cord 450.

[0076] In some specific embodiments of this utility model, such as Figure 3As shown, the chassis 100 is provided with a fixed post 110, and both the stop member 300 and the driving member 410 are rotatably sleeved on the fixed post 110, with the stop member 300 located above the driving member 410. The fixed post 110 extends in the vertical direction.

[0077] That is, the gear shifter 300 and the drive member 410 can be arranged coaxially, and the rotation of the drive member 410 and the gear shifter 300 will not cause positional interference. This also makes the structural arrangement of the drive member 410 and the gear shifter 300 more compact, which helps to save space inside the chassis 100 and facilitates layout.

[0078] Furthermore, such as Figures 1-3 As shown, the seat chassis assembly 1 also includes a connector 120, which is connected to the fixing column 110 and stops on the side of the stop member 300 facing away from the chassis 100.

[0079] The connector 120 may be provided with a threaded rod and a baffle. The connector 120 can be screwed to the fixed post 110 through the threaded rod, and the baffle can stop the stop member 300 on the side facing away from the chassis 100. Thus, the connector 120 and the chassis 100 can be used to clamp and fix the stop member 300 and the driving member 410, preventing the stop member 300 and the driving member 410 from detaching from the fixed post 110.

[0080] In some specific embodiments of this utility model, such as Figures 2-4 As shown, the seat chassis assembly 1 also includes a limiting component 500.

[0081] The limiting member 500 is rotatably connected to the chassis 100. The limiting member 500 and the drive assembly 400 are located on the radial sides of the gear shift member 300, and the limiting member 500 and the drive assembly 400 respectively abut against the stop steps 321 of different gear shift adjustment blocks 320.

[0082] Understandably, when the driving member 410 rotates clockwise, the other end of the driven member 420 slides along the outer circumferential surface of the gear adjustment block 320. At this time, the driven member 420 will press against the gear position member 300. By setting the limiting member 500 to stop the gear position member 300, the gear position member 300 can be prevented from rotating clockwise under the pressure of the driven member 420. In this way, when the driven member 420 slides around the outer circumferential surface of the gear adjustment block 320, the gear position member 300 can remain stationary, so that the driven member 420 can move from the stop step 321 of one gear adjustment block 320 to stop against the stop step 321 of another gear adjustment block 320. Then, when the user releases the pull cord 450, the elastic reset force of the first elastic reset member 430 and the second elastic reset member 440 can drive the gear position member 300 to rotate counterclockwise through the driving member 410 and the driven member 420, thereby switching to the next gear.

[0083] Furthermore, such as Figure 3 As shown, the seat chassis assembly 1 also includes a third elastic reset member 510. The third elastic reset member 510 can be a torsion spring.

[0084] The third elastic reset member 510 is disposed between the limiting member 500 and the chassis 100, and the third elastic reset member 510 is connected to the limiting member 500 and the chassis 100 respectively, so as to generate an elastic force that drives the limiting member 500 to rotate counterclockwise relative to the chassis 100 when the limiting member 500 rotates clockwise relative to the chassis 100.

[0085] When the driven member 420 pushes the gear shift member 300 to rotate counterclockwise, the gear shift adjustment block 320 will push the limit member 500 to rotate clockwise. By setting the third elastic reset member 510, when the driven member 420 switches to the next gear, the third elastic reset member 510 can drive the limit member 500 to rotate counterclockwise, so that the limit member 500 can be reset and stop against the stop step 321 of the other gear shift adjustment block 320 again. Thus, the limit member 500 can be used to stop and limit the gear shift member 300 again, so that the gear shift member 300 can be switched again.

[0086] The gear shifting of the seat chassis assembly 1 according to this utility model embodiment will be described in detail below:

[0087] When the stop member 220 is in a certain position, the follower 420 abuts against the stop step 321 of a position adjustment block 320, and at the same time, the limit member 500 abuts against the stop step 321 of another position adjustment block 320. At this time, when the back of the chair is tilted to the maximum angle, one of the stop teeth 221 of the stop member 220 can stop against the stop block 310 corresponding to that position, thereby limiting the maximum tilt angle of the chair back.

[0088] When the user needs to adjust the maximum reclining angle of the chair back, they can manually pull the pull cord 450. The pull cord 450 can drive the driving member 410 to rotate clockwise, and the driven member 420 can follow the driving member 410 to rotate around the central axis of the fixed column 110. At the same time, the other end of the driven member 420 will slide along the outer peripheral surface of the gear adjustment block 320. In this way, the driven member 420 will rotate clockwise relative to the driving member 410 under the pressure of the outer peripheral surface of the gear adjustment block 320. And because the limiting member 500 stops and limits the gear 300, the gear 300 can remain stationary.

[0089] Then, when the driving member 410 drives the driven member 420 to rotate until the driven member 420 jumps to the next stop step 321, the driven member 420 stops against the next stop step 321. At this time, the user releases the pull rope 450, and the first elastic reset member 430 can drive the driving member 410 to rotate counterclockwise to reset. At the same time, the second elastic reset member 440 can drive the driven member 420 to rotate counterclockwise relative to the driving member 410 to reset. During the reset process of the driving member 410 and the driven member 420, the driven member 420 can push the gear shift member 300 to rotate counterclockwise, thereby pushing the gear shift member 300 to rotate and switch gears. The gear shift member 300 can use the next gear shift block 310 to stop the other gear tooth 221 of the stop member 220, thereby realizing the adjustment of the maximum reclining angle of the chair back.

[0090] The following description of a seat according to an embodiment of the present invention is with reference to the accompanying drawings.

[0091] The seat includes chair legs, a seat chassis assembly 1 according to the above embodiments of the present invention, a seat cushion assembly, and a seat back assembly.

[0092] The seat chassis assembly 1 is connected to the seat legs, the seat cushion assembly is located above the seat chassis assembly 1 and connected to the seat chassis assembly 1, and the seat back assembly is rotatably connected to the seat chassis assembly 1.

[0093] According to the embodiment of the present invention, the seat chassis assembly 1 according to the above embodiment of the present invention can drive the gear shift member 300 to rotate via the drive component 400, so as to use different gear shift blocks 310 to stop different gear shift teeth 221, thereby adjusting the maximum rotation angle of the seat back. Moreover, the cooperation structure between the gear shift teeth 221 and the gear shift block 310 is simple and the cooperation is more stable and reliable.

[0094] The seat chassis assembly 1 and other components and operations of the seat according to the embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0095] In the description of this specification, references to terms such as "specific embodiment" and "specific example" refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0096] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A seat pan assembly (1) characterized by, The chair comprises: a chassis (100); a rotating shaft assembly (200) comprising a rotating shaft (210) and a stopper (220), the stopper (220) being fixed opposite to the rotating shaft (210) and having a plurality of stop teeth (221), the rotating shaft (210) being rotatably connected to the chassis (100) and extending along the left-right direction of the chassis (100), the rotating shaft assembly (200) being adapted to be connected with a chair back assembly and synchronously rotating with the chair back assembly; a stopper piece (300) rotatably arranged on the chassis (100) and having a plurality of switchable stops, the stopper piece (300) being provided with a plurality of stop blocks (310) arranged along the circumferential direction thereof, the plurality of stop blocks (310) one-to-one corresponding to the plurality of stops, and the plurality of stop blocks (310) one-to-one corresponding to the plurality of stop teeth (221); a driving assembly (400) rotatably connected to the chassis (100) and drivingly connected with the stopper piece (300), the driving assembly (400) being used to drive the stopper piece (300) to rotate relative to the chassis (100); wherein, when the driving assembly (400) drives the stopper piece (300) to rotate to different stops, the stopper piece (300) stops the corresponding stop teeth (221) through different stop blocks (310) to limit the maximum rotating angle of the rotating shaft (210) relative to the chassis (100).

2. The seat pan assembly (1) according to claim 1, characterized in that In the radial direction of the rotating shaft (210), the maximum distance between the stop teeth (221) and the central axis of the rotating shaft (210) is the height of the stop teeth (221), the plurality of stop teeth (221) are arranged along the circumferential direction of the stopper (220) and away from the chassis (100) in the up-down direction, and the heights of the plurality of stop teeth (221) gradually increase; and In the radial direction of the stopper piece (300), the distance between the radial outer side of the stop block (310) and the central axis of the stopper piece (300) is the radius of the stop block (310), the stop block (310) extends in a fan shape along the circumferential direction of the stopper piece (300), adjacent two stop blocks (310) are connected with each other, and the radii of the plurality of stop blocks (310) gradually decrease in the circumferential direction of the stopper piece (300). Wherein, when the stopper piece (300) is in different stops, the stopper piece (300) stops stop teeth (221) of different heights through stop blocks (310) of different radii.

3. The seat pan assembly (1) according to claim 1, characterized in that, The stopper piece (300) further comprises: A plurality of gear adjusting blocks (320) are arranged on one axial side of the gear block (310), and are arranged along the circumferential direction of the gear part (300). The outer diameter of each gear adjusting block (320) gradually increases along the circumferential direction of the gear part (300), and one end of the gear adjusting block (320) is provided with a stop step (321). When the stop part (220) is in different gears, the driving assembly (400) abuts against the stop step (321) of different gear adjusting blocks (320).

4. The seat pan assembly (1) according to claim 3, characterized in that The driving assembly (400) comprises: A driving part (410) is rotatably connected to one end of the chassis (100); A driven part (420) is rotatably connected to the other end of the driving part (410), and the other end of the driven part (420) abuts against the stop step (321).

5. The seat pan assembly (1) according to claim 4, characterized in that The driving assembly (400) further comprises: A first elastic return part (430) is arranged between the driving part (410) and the chassis (100), and the first elastic return part (430) is connected to the driving part (410) and the chassis (100) respectively, so as to generate an elastic force for driving the driving part (410) to rotate counterclockwise relative to the chassis (100) when the driving part (410) rotates clockwise relative to the chassis (100); A second elastic return part (440) is arranged between the driving part (410) and the driven part (420), and the second elastic return part (440) is connected to the driving part (410) and the driven part (420) respectively, so as to generate an elastic force for driving the driven part (420) to rotate counterclockwise relative to the driving part (410) when the driven part (420) rotates clockwise relative to the driving part (410).

6. The seat pan assembly (1) according to claim 4, characterized in that The driving assembly (400) further comprises: A pull rope (450) has an anti-dropping part (451) connected to one end, and the anti-dropping part (451) is rotatably connected to the other end of the driving part (410); A pull rope protection tube (460) is fixed to the chassis (100), and the pull rope (450) is movably arranged in the pull rope protection tube (460), and the other end of the pull rope (450) extends out of the chassis (100).

7. The seat pan assembly (1) according to claim 4, characterized in that The chassis (100) is provided with a fixed column (110), and the gear part (300) and the driving part (410) are rotatably arranged in the fixed column (110), and the gear part (300) is arranged above the driving part (410).

8. The seat pan assembly (1) according to claim 7, characterized in that Further comprising: A connecting part (120) is connected to the fixed column (110) and is stopped on the side of the gear part (300) away from the chassis (100).

9. The seat pan assembly (1) according to claim 3, characterized in that, Further comprising: a limiting member (500) rotatably connected to the chassis (100), the limiting member (500) and the driving assembly (400) are arranged on two sides of the gear member (300) in the radial direction, and the limiting member (500) and the driving assembly (400) respectively abut against the stop steps (321) of different gear adjusting blocks (320).

10. The seat pan assembly (1) according to claim 9, characterized in that Further comprising: a third elastic reset member (510) arranged between the limiting member (500) and the chassis (100), and the third elastic reset member (510) is connected with the limiting member (500) and the chassis (100) respectively, so as to generate an elastic force for driving the limiting member (500) to rotate counterclockwise relative to the chassis (100) when the limiting member (500) rotates clockwise relative to the chassis (100).

11. A seat, characterized by Comprising: a chair leg; a seat chassis assembly (1) according to any one of claims 1-10, the seat chassis assembly (1) is connected to the chair leg; a seat cushion assembly arranged above and connected with the seat chassis assembly (1); a seat back assembly rotatably connected to the seat chassis assembly (1).

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