A seat

Abstract

The utility model discloses a seat relates to the technical field of sitting utensil, and the seat includes soft pad and support piece, and the soft pad is connected in seat frame, and the support piece is located the below of soft pad, and one side of support piece sets up abutting portion, and abutting portion has first inclined plane, and transmission assembly includes transmission link and control piece of transmission connection, and transmission link is along first direction setting. Transmission link is along first direction movement, and second inclined plane is close to and extruding first inclined plane at this time, makes second inclined plane and first inclined plane relative sliding, along the direction from soft pad to support piece, first inclined plane is inclined to the direction of facing away transmission rod, makes support piece under the action of transmission rod to the direction of moving close to soft pad, thereby makes the distance between support piece and soft pad reduce, and further makes the cushion change hard, transmission rod is along second direction movement, and support piece is under the action of gravity relative seat frame and drops, makes support piece away from soft pad, and further makes the cushion change soft.

Description

Technical Field

[0001] This utility model belongs to the technical field of seating, and specifically relates to a chair. Background Technology

[0002] One crucial aspect of seat comfort is the firmness of the seat cushion. Current seats typically use single-density foam, springs, or fixed filling materials as cushioning, meaning their firmness is fixed at the factory. This fails to meet the needs of different users in various situations. When choosing a seat, users can only select a compromise firmness based on their current preferences and body type, which cannot satisfy the dynamic needs of different usage scenarios, different individuals, or even the same individual at different times. Utility Model Content

[0003] The purpose of this invention is to provide a seat that adjusts the distance between the cushion and the support member through a transmission component to achieve a suitable level of firmness.

[0004] The technical solution adopted to solve the above-mentioned technical problems is as follows: This utility model provides a type of seat, comprising: Seat frame; A seat cushion includes a soft pad and a support member, the soft pad being connected to the seat frame; the support member being located below the soft pad; an abutment portion is provided on one side of the support member, the abutment portion having a first inclined surface; A transmission assembly includes a transmission rod and a control component connected by transmission. The transmission rod is arranged along a first direction. The transmission assembly is located on one side of the support member, along the direction from the cushion to the support member, with a first inclined surface inclined in a direction away from the transmission rod. The transmission rod has a second inclined surface that abuts against the first inclined surface. The control component is capable of driving the transmission rod to move along either the first or second direction, where the first direction is opposite to the second direction. When the transmission rod moves along the first direction, the second inclined surface and the first inclined surface slide relative to each other, causing the support member to rise relative to the seat frame, bringing the support member closer to the cushion. When the transmission rod moves along the second direction, the support member descends relative to the seat frame under the influence of gravity, moving the support member away from the cushion.

[0005] According to an embodiment of the present invention, the control component of the seat includes a rotary member and a reset member. The rotary member is provided with a third inclined surface, which is inclined towards the transmission rod along the height direction from the seat frame. The transmission rod is provided with a fourth inclined surface that abuts against the third inclined surface. When the rotary member moves along the height direction of the seat frame, the third inclined surface and the fourth inclined surface slide relative to each other to push the transmission rod to move along a first direction. When the rotary member moves in the opposite direction, the transmission rod moves along a second direction under the action of the reset member.

[0006] According to an embodiment of the present utility model, the seat has a rotating member that is a rod, and the third inclined surface is located on the outer periphery of the pushing section. The rotating member includes a threaded section and a pushing section connected together. The seat frame is provided with a threaded hole along the height direction of the seat frame, and the threaded section is helically connected to the threaded hole.

[0007] According to an embodiment of the present invention, the reset member cooperates with the transmission rod and the seat frame; when the toggle member moves along the reset direction, the elastic force of the reset member causes the transmission rod to move along the second direction.

[0008] According to an embodiment of the present invention, the seat has the abutting portion located in the middle of the support member; and / or the toggle member located at the edge of the seat frame.

[0009] According to an embodiment of the present invention, the seat frame is provided with a first stop portion, and the transmission rod is provided with a second stop portion; the reset member is sleeved on the outside of the transmission rod and is located between the first stop portion and the second stop portion.

[0010] According to an embodiment of the present invention, the seat further includes a spring sleeve located between the first stop portion and the second stop portion; a portion of the reset member is located inside the spring sleeve.

[0011] According to an embodiment of the present invention, the first stop portion of the seat is provided with a guide channel, which is arranged along a first direction; the transmission rod is slidably disposed in the guide channel, and the guide channel is used to guide the movement path of the transmission rod.

[0012] According to an embodiment of the present invention, one of the seat frame and the transmission rod is provided with a sliding groove, and the other is provided with a slider; the sliding groove is arranged along a first direction; the slider is slidably disposed in the sliding groove to guide the movement path of the transmission rod.

[0013] According to an embodiment of the present invention, the seat cushion includes a bottom wall and a side wall, the side wall is connected to the seat frame, the bottom wall and the side wall enclose a receiving space, and the support member and the transmission assembly are located within the receiving space.

[0014] The present invention has at least the following beneficial effects: The support member is located below the cushion and provides support for it. The support member slides along the height of the seat frame to move closer to or further away from the cushion. The closer the support member is to the cushion, the firmer the cushion. A control component can drive a transmission rod to move along a first or second direction. When the transmission rod moves along the first direction, a second inclined surface approaches and presses against the first inclined surface, causing them to slide relative to each other. Along the direction from the cushion to the support member, the first inclined surface tilts away from the transmission rod, causing the support member to move closer to the cushion under the action of the transmission rod, thus reducing the distance between the support member and the cushion, and thus making the cushion firmer. When the transmission rod moves along the second direction to avoid the support member, it no longer restricts the support member's descent, allowing it to descend relative to the seat frame under gravity, thus moving the support member away from the cushion, and thus making the cushion softer. Adjusting the distance between the cushion and the support member through the transmission assembly allows the cushion to be adjusted to a suitable firmness. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments; Figure 1 This is a schematic diagram of the overall structure of the seat provided in this embodiment of the utility model; Figure 2 This is one of the internal structural schematic diagrams of the seat provided in this embodiment of the utility model; Figure 3 This is a schematic diagram showing the cooperation relationship between the transmission component, seat frame, and support component of the seat provided in this embodiment of the utility model; Figure 4 yes Figure 2 Enlarged view of the structure at point B; Figure 5 This is the second schematic diagram of the internal structure of the seat provided in this embodiment of the utility model; Figure 6 yes Figure 2 Enlarged view of the structure at point A in the middle; Figure 7 This is an exploded view of the seat cushion of the chair provided in this embodiment of the utility model.

[0016] The following labels are shown in the attached diagram: 100, Seat frame; 110, Backrest; 120, Support leg; 130, Reset part; 140, First stop; 141, Guide channel; 150, Spring sleeve; 160, Slide groove; 200, seat cushion; 210, soft cushion; 211, bottom wall; 212, side wall; 220, support member; 221, abutment part; 2211, first inclined surface; 300. Transmission assembly; 310. Transmission rod; 311. Second inclined surface; 312. Extension block; 313. Fourth inclined surface; 320. Twist component; 321. Threaded section; 322. Push section; 3221. Groove; 3222. Third inclined surface; 330. Second stop; 340. Slider. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, the use of terms such as "several" means one or more, with "multiple" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the quantity of indicated technical features, or the sequential relationship between indicated technical features.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Reference Figures 1 to 7 The following are several embodiments of the seat of this utility model.

[0022] like Figures 1 to 4As shown, the seat of this utility model embodiment includes a seat frame 100, a seat cushion 200, and a transmission assembly 300. The seat cushion 200 includes a soft pad 210 and a support member 220, with the soft pad 210 connected to the seat frame 100. The support member 220 is located below the soft pad 210. An abutment portion 221 is provided on one side of the support member 220, and the abutment portion 221 has a first inclined surface 2211. The transmission assembly 300 includes a transmission rod 310 and a control component that are connected by transmission. The transmission rod 310 is arranged along a first direction. The transmission assembly 300 is located on one side of the support member 220, and along the direction from the soft pad 210 to the support member 220, the first inclined surface 2211... 1. Inclined in the direction away from the transmission rod 310; the transmission rod 310 has a second inclined surface 311 that abuts against the first inclined surface 2211; the control component can drive the transmission rod 310 to move along a first direction or a second direction, the first direction being opposite to the second direction; when the transmission rod 310 moves along the first direction, the second inclined surface 311 and the first inclined surface 2211 slide relative to each other, and the support member 220 rises relative to the seat frame 100, so that the support member 220 moves closer to the cushion 210; when the transmission rod 310 moves along the second direction, the support member 220 falls relative to the seat frame 100 under the action of gravity, so that the support member 220 moves away from the cushion 210.

[0023] The support member 220 is located below the cushion 210 and provides support for the cushion 210; the support member 220 slides along the height direction of the seat frame 100 to move closer to or further away from the cushion 210; the closer the support member 220 is to the cushion 210, the firmer the seat cushion 200; the control component can drive the transmission rod 310 to move along a first direction or a second direction; when the transmission rod 310 moves along the first direction, the second inclined surface 311 approaches and presses against the first inclined surface 2211, causing the second inclined surface 311 and the first inclined surface 2211 to slide relative to each other; along the direction from the cushion 210 to the support member 220, the first inclined surface 2211 faces away from the transmission rod 310. The seat cushion 200 is made to tilt, causing the support member 220 to move closer to the cushion 210 under the action of the transmission rod 310, thereby reducing the distance between the support member 220 and the cushion 210 and making the seat cushion 200 harder. The transmission rod 310 moves along the second direction to avoid the support member 220. The transmission rod 310 no longer restricts the support member 220 from falling, allowing the support member 220 to descend relative to the seat frame 100 under the action of gravity, thereby moving the support member 220 away from the cushion 210 and making the seat cushion 200 softer. The distance between the cushion 210 and the support member 220 is adjusted by the transmission assembly 300 to achieve a suitable firmness.

[0024] like Figure 5As shown, the transmission rod 310 moves along the first direction to transmit the power of the control component to the support member 220. Since the first inclined surface 2211 is inclined in the direction away from the transmission rod 310 along the direction from the cushion 210 to the support member 220, the support member 220 moves closer to the cushion 210 under the action of the transmission rod 310, reducing the distance between the support member 220 and the cushion 210, thereby making the seat cushion 200 firmer. The transmission rod 310 is arranged along the first direction to efficiently transmit the force of the torsion member 320. The first direction is a lateral direction, which can fully utilize the lateral space of the seat cushion 200 and reduce the occupation of vertical space. Figure 2 As shown, if the transmission component moves along the second direction, the support component 220 falls back under the action of gravity. At this time, the distance between the support component 220 and the seat cushion 200 increases, thereby making the seat cushion 200 softer. The cushion 210 can be made of soft materials such as sponge; the support component 220 can be a board, which can reduce the space occupied while supporting the cushion 210; the support component 220 can be a plastic board.

[0025] like Figures 2 to 4 As shown, the second inclined surface 311 is located on the side of the transmission rod 310 near the abutment portion 221. Under the action of the torsion member 320, the transmission rod 310 moves closer to the abutment portion 221, causing the first inclined surface 2211 and the second inclined surface 311 to slide relative to each other. The first inclined surface 2211 is inclined in the direction away from the transmission rod 310 from the soft pad 210 to the support member 220. Correspondingly, the second inclined surface 311 is inclined in the direction towards the abutment portion 221 from the soft pad 210 to the support member 220, so as to facilitate the cooperation between the first inclined surface 2211 and the second inclined surface 311. An extension block 312 can be protruded on the side of the transmission rod 310 facing the support member 220, and the second inclined surface 311 extends from the transmission rod 310 to the extension block 312. The extension block 312 can increase the area of ​​the second inclined surface 311, facilitating the cooperation between the first inclined surface 2211 and the second inclined surface 311.

[0026] In some embodiments, the support member 220 rises or falls relative to the seat frame 100. Guide posts can be provided on the support member 220, and guide cylinders can be provided on the seat frame 100, with the guide cylinders sleeved outside the guide posts to guide the support member 220 to rise or fall relative to the seat frame 100. The seat frame 100 is rectangular, and guide cylinders are provided at each of its four corners. Correspondingly, the support member 220 is rectangular, and guide posts are provided at each of its four corners, with each guide post and guide cylinder corresponding to the other. Alternatively, guide blocks can be provided on the second inclined surface 311, and guide grooves can be provided on the first inclined surface 2211, extending along the inclined direction of the first inclined surface 2211. The guide blocks slide within the guide grooves to guide the movement direction of the support member 220.

[0027] like Figure 6As shown, in some embodiments, the control component includes a knob 320 and a reset member 130. The knob 320 is provided with a third inclined surface 3222, which is inclined towards the transmission rod 310 along the height direction of the seat frame 100. The transmission rod 310 is provided with a fourth inclined surface 313 that abuts against the third inclined surface 3222. When the knob 320 moves along the height direction of the seat frame 100, the third inclined surface 3222 and the fourth inclined surface 313 slide relative to each other to push the transmission rod 310 to move along a first direction. When the knob 320 moves in the opposite direction, the transmission rod 310 moves along a second direction under the action of the reset member 130.

[0028] Understandably, both the driving direction and the reset direction are set along the height direction of the seat frame 100. The toggle member 320 moves along the height direction of the seat frame 100, and the third inclined surface 3222 approaches and presses against the fourth inclined surface 313. The fourth inclined surface 313 slides relative to the third inclined surface 3222. Along the height direction of the seat frame 100, the third inclined surface 3222 is inclined toward the direction of the transmission rod 310, so that the transmission rod 310 moves along the first direction under the action of the toggle member 320, thereby pushing the support member 220 closer to the soft pad 210. The toggle member 320 moves in the opposite direction and resets. The transmission rod 310 moves along the second direction under the action of the reset member 130, thereby realizing the descent of the support member 220.

[0029] like Figure 3 and Figure 6 As shown, in some embodiments, the torsion member 320 is a rod, and the third inclined surface 3222 is located on the outer periphery of the pushing section 322. The torsion member 320 includes a threaded section 321 and a pushing section 322 connected together. The seat frame 100 is provided with a threaded hole along the height direction of the seat frame 100, and the threaded section 321 is helically connected to the threaded hole. The helically connected threaded section 321 and threaded hole allow the threaded section 321 to move relative to the seat frame 100, which facilitates the adjustment of the movement of the torsion member 320 in the vertical direction. The helically connected threaded section 321 and threaded hole allow the torsion member 320 to be easily screwed into or out of the seat frame 100, and through the cooperation of the threaded section 321 and the threaded hole, the torsion member 320 is fixed in a suitable position, thereby allowing the seat cushion 200 to maintain a suitable softness and hardness. During the movement of the threaded section 321, the pushing section 322 rotates accordingly. The third inclined surface 3222 is located on the outer periphery of the pushing section 322, so that the third inclined surface 3222 can continuously cooperate with the fourth inclined surface 313 during the screwing process.

[0030] like Figure 3 and Figure 6As shown, in some embodiments, a groove 3221 is provided on the periphery of the pushing section 322, and third inclined surfaces 3222 are respectively provided on opposite sides of the groove 3221. One of the third inclined surfaces 3222 is inclined towards the transmission member in the direction from the soft pad 210 to the support member 220, and the other third inclined surface 3222 is inclined towards the transmission member in the direction from the support member 220 to the soft pad 210. The two third inclined surfaces 3222 are intersecting. Correspondingly, fourth inclined surfaces 313 are respectively provided on opposite sides of the transmission rod 310. One of the fourth inclined surfaces 313 abuts against one of the third inclined surfaces 3222, and the other fourth inclined surface 313 abuts against the other third inclined surface 3222. That is to say, the upward or downward movement of the toggle member 320 can be driven by the cooperation of the third inclined surface 3222 and the fourth inclined surface 313 to drive the transmission rod 310 to move along the first direction, thereby improving flexibility.

[0031] The torsion member 320 is a screw, the threaded section 321 is the threaded part of the screw, and the pushing section 322 is the smooth part of the screw. The nut of the screw is located at the end of the pushing section 322. Generally, the threaded hole is set at the bottom of the seat frame 100, and the torsion member 320 is screwed into the threaded hole from the bottom of the seat frame 100. In use, the torsion member 320 can be controlled to move upward or downward by rotating the nut of the torsion member 320 in the forward or reverse direction, so that the transmission rod 310 moves along the first direction, thereby pushing the support member 220 closer to the cushion 210, and thus adjusting the seat cushion 200 to a suitable softness and hardness. It should be noted that when one of the fourth inclined surfaces 313 abuts against one of the third inclined surfaces 3222, and the other fourth inclined surface 313 abuts against the other third inclined surface 3222, the end of the transmission rod 310 is completely embedded in the groove 3221, and the transmission rod 310 can no longer move away from the abutment 221. The support member 220 falls back to the lowest point. At this time, the distance between the support member 220 and the cushion 210 is the largest, and the seat cushion 200 is in the softest state.

[0032] like Figure 2 and Figure 3 As shown, in some embodiments, the abutment portion 221 is located in the middle of the support member 220, that is, the force-bearing position of the support member 220 is located in the middle of the support member 220, which is beneficial for the support member 220 to maintain balance during movement and improve the stability of the movement of the support member 220.

[0033] like Figure 2 and Figure 3As shown, in some embodiments, the knob 320 is located at the edge of the seat frame 100, facilitating adjustment of the distance between the support member 220 and the cushion 210 from the edge of the seat frame 100, thereby adjusting the firmness of the seat cushion 200. Generally, the seat cushion 200 covers the seat frame 100, and to ensure support, the area of ​​the seat frame 100 is approximately the same as that of the seat cushion 200; the abutment portion 221 is located in the middle of the support member 220, that is, the abutment portion 221 is located in the middle of the seat frame 100, making it inconvenient to directly operate the support member 220; the knob 320 is located at the edge of the seat frame 100, and by operating the knob 320, the transmission rod 310 transmits the force of the knob 320, thereby controlling the position of the support member 220.

[0034] like Figure 2 and Figure 3 As shown, in some embodiments, the reset member 130 cooperates with the transmission rod 310 and the seat frame 100; the elastic force of the reset member 130 causes the transmission rod 310 to move along a second direction, which is opposite to the first direction; the toggle member 320 moves along the height direction of the seat frame 100, and the transmission rod 310 moves along the first direction under the action of the toggle member 320, so that the second inclined surface 311 approaches and presses the first inclined surface 2211, at which time the reset member 130 compresses and stores energy; the toggle member 320 moves in the opposite direction to reserve reset space for the transmission rod 310, at which time the reset member 130 releases elastic potential energy, causing the transmission rod 310 to move along the second direction; if the toggle member 320 rotates to the initial position, the elastic force of the reset member 130 causes the transmission rod 310 to move along the second direction until the transmission rod 310 is completely reset.

[0035] like Figure 2 and Figure 3 As shown, in some embodiments, the seat frame 100 is provided with a first stop portion 140, and the transmission rod 310 is provided with a second stop portion 330; the reset member 130 is sleeved on the outside of the transmission rod 310 and is located between the first stop portion 140 and the second stop portion 330; when the transmission rod 310 moves along a first direction, the distance between the first stop portion 140 and the second stop portion 330 decreases, and the reset member 130 is compressed and stores energy; if the torsion member 320 rotates to the initial position, the reset member 130 releases potential energy, causing the transmission rod 310 to move along a second direction, and the distance between the first stop portion 140 and the second stop portion 330 increases accordingly.

[0036] like Figure 2 and Figure 3As shown, in some embodiments, the seat further includes a spring sleeve 150, which is located between the first stop portion 140 and the second stop portion 330. A portion of the reset member 130 is located inside the spring sleeve 150. The spring sleeve 150 can provide some protection for the reset member 130, and at the same time, it can prevent the reset member 130 from being excessively compressed, thus preventing excessive deformation and failure. The second stop portion 330 is block-shaped, and second stop portions 330 can be respectively provided on opposite sides of the transmission rod 310. By providing two second stop portions 330, the maximum outer diameter of the transmission rod 310 is increased to limit the movement of the spring sleeve 150 and the reset member 130. Similarly, the maximum width of the second stop portion 330 in the radial direction of the transmission rod 310 is greater than the outer diameter of the spring sleeve 150. Generally, the reset member 130 is a spring.

[0037] like Figure 2 and Figure 3 As shown, in some embodiments, the first stop portion 140 is provided with a guide channel 141, which is arranged along a first direction; the transmission rod 310 is slidably disposed in the guide channel 141, which is used to guide the movement path of the transmission rod 310; on the one hand, the transmission rod 310 sliding in the guide channel 141 can improve the firmness of the connection between the transmission rod 310 and the seat frame 100 and prevent the transmission rod 310 from detaching from the seat frame 100; on the other hand, the guide channel 141 can guide the movement path of the transmission rod 310 and prevent the transmission rod 310 from deviating from its original trajectory.

[0038] like Figure 2 and Figure 3 As shown, in some embodiments, one of the seat frame 100 and the transmission rod 310 is provided with a groove 160, and the other is provided with a slider 340; the groove 160 is provided along a first direction; the slider 340 is slidably disposed in the groove 160 to guide the movement path of the transmission rod 310.

[0039] It is understood that the cooperation of slider 340 and groove 160 can guide the transmission rod 310 to move along the first direction, preventing the transmission rod 310 from deviating during operation. In this embodiment, slider 340 is disposed on transmission rod 310, and groove 160 is disposed on seat frame 100. In other embodiments, groove 160 may be disposed on transmission rod 310, and slider 340 may be disposed on seat frame 100. This embodiment of the present invention does not particularly limit this. Slider 340 may be a slider extending along the first direction. By increasing the length of slider 340 in the first direction, the movement of transmission rod 310 in the first direction becomes more stable.

[0040] like Figure 7As shown, in some embodiments, the cushion 210 includes a bottom wall 211 and a side wall 212. The side wall 212 is connected to the seat frame 100. The bottom wall 211 and the side wall 212 enclose a receiving space. The support member 220 and the transmission assembly 300 are located within the receiving space. The cushion 210 wraps the support member 220 and the transmission assembly 300 through the bottom wall 211 and the side wall 212, avoiding the exposure of the hard parts of the support member 220 and the transmission assembly 300, and improving the comfort of use.

[0041] like Figure 1 As shown, in some embodiments, the seat also includes a backrest 110 and a support leg 120. The support leg 120 is disposed at the bottom of the seat frame 100 and is used to support the seat frame 100. The backrest 110 is connected to the seat frame 100 and provides support for the user's back, improving the comfort of use.

[0042] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A type of seat, characterized in that, include: Seat frame; A seat cushion, including a soft pad and a support member, wherein the soft pad is connected to the seat frame; The support member is located below the cushion; The support member has an abutment portion on one side, and the abutment portion has a first inclined surface; A transmission assembly includes a transmission rod and a control component connected by transmission. The transmission rod is arranged along a first direction. The transmission assembly is located on one side of the support member, along the direction from the cushion to the support member, with a first inclined surface inclined in a direction away from the transmission rod. The transmission rod has a second inclined surface that abuts against the first inclined surface. The control component is capable of driving the transmission rod to move along either the first or second direction, where the first direction is opposite to the second direction. When the transmission rod moves along the first direction, the second inclined surface and the first inclined surface slide relative to each other, causing the support member to rise relative to the seat frame, bringing the support member closer to the cushion. When the transmission rod moves along the second direction, the support member descends relative to the seat frame under the influence of gravity, moving the support member away from the cushion.

2. The seat according to claim 1, characterized in that, The control component includes a knob and a reset component. The knob has a third inclined surface that is inclined toward the transmission rod along the height direction from the seat frame. The transmission rod has a fourth inclined surface that abuts against the third inclined surface. When the knob moves along the height direction of the seat frame, the third and fourth inclined surfaces slide relative to each other to push the transmission rod to move along a first direction. When the knob moves in the opposite direction, the transmission rod moves along a second direction under the action of the reset component.

3. The seat according to claim 2, characterized in that, The torsion member is a rod, and the third inclined surface is located on the outer periphery of the pushing section; the torsion member includes a threaded section and a pushing section connected together, and the seat frame is provided with a threaded hole arranged along the height direction of the seat frame, and the threaded section is helically connected to the threaded hole.

4. The seat according to claim 2, characterized in that, The reset member cooperates with the transmission rod and the seat frame; when the torsion member moves along the reset direction, the elastic force of the reset member causes the transmission rod to move along the second direction.

5. The seat according to any one of claims 1 to 4, characterized in that, The abutting portion is located in the middle of the support member; and / or, the toggle member is located at the edge of the seat frame.

6. The seat according to claim 5, characterized in that, The seat frame is provided with a first stop portion, and the transmission rod is provided with a second stop portion; the reset member is sleeved on the outside of the transmission rod and is located between the first stop portion and the second stop portion.

7. The seat according to claim 6, characterized in that, The seat also includes a spring sleeve located between the first stop and the second stop; a portion of the reset member is located inside the spring sleeve.

8. The seat according to claim 6, characterized in that, The first stop portion is provided with a guide channel, which is arranged along a first direction; the transmission rod is slidably disposed in the guide channel, which is used to guide the movement path of the transmission rod.

9. The seat according to any one of claims 1 to 4, characterized in that, One of the seat frame and the transmission rod is provided with a sliding groove, and the other is provided with a slider; the sliding groove is provided along a first direction; the slider is slidably disposed in the sliding groove to guide the movement path of the transmission rod.

10. The seat according to any one of claims 1 to 4, characterized in that, The cushion includes a bottom wall and a side wall, the side wall being connected to the seat frame, the bottom wall and the side wall forming an accommodating space, and the support member and the transmission assembly being located within the accommodating space.

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