Seat

Abstract

The utility model provides a seat. The seat comprises a base, rollers arranged below the base, a chair seat arranged above the base, a lifting driving piece arranged between the chair seat and the base, a supporting piece arranged on the lifting driving piece, a brake part arranged at the lower end part of the supporting piece and a pedal piece arranged on the supporting piece, wherein the lifting driving piece can be used for adjusting the height of the chair seat, the pedal piece is linked with the brake part, and the pedal part is configured to be used for placing feet and serve as a starting piece for downward movement of the brake part; in the movable state, the pedal piece, the supporting piece and the brake part are all suspended, and the rolling wheels can roll, so that the seat can move; in the locking state, the feet are placed on the pedal piece, the pedal piece drives the brake part to move downwards and touch the ground for braking, so that the rolling wheels are prevented from rolling, the seat is prevented from moving, and the seat is kept stable; therefore, the brake function of a brake roller is replaced, and the cost is saved; the utility model further provides a seat, and the supporting piece in the seat is arranged on the chair seat, so that the same effect can be achieved.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a seat. Background Art

[0002] With the continuous improvement of living standards, people are paying more and more attention to the impact of furniture on children. High-quality children's furniture that meets parents' psychological expectations often gains more market share. Therefore, based on user feedback, product updates and iterations are very necessary. In order to make it more suitable for children, manufacturers have developed a children's chair with rollers to facilitate the movement of the children's chair. However, parents hope that the rollers on the children's chair can be locked when the child is sitting in the children's chair or when sitting on and getting up to improve safety. Therefore, manufacturers choose brake wheels as rollers. Specifically, there are at least two brake wheels on the children's chair, which are generally set on the two front legs of the children's chair. When locking, both brake wheel switches need to be stepped on. When unlocking, both brake wheel switches need to be lifted up, which is inconvenient to operate. What's more troublesome is that you even need to squat down and use your hands to pry the switch to unlock.

[0003] Moreover, the cost of brake wheels is high. Compared with ordinary universal wheels, the cost of a single brake wheel is 4-8 times that of ordinary universal wheels. The high cost greatly reduces the manufacturer's profit. Moreover, when the brake wheels are replaced during after-sales service, the cost is further increased.

[0004] In addition, since the legs of the children's chair are horizontal and the brake wheel is set under the legs, the protruding switch of the brake wheel interferes with the legs when the brake wheel turns. Once the interference occurs, the other rollers are oriented differently from the brake wheel, and the children's chair cannot be moved. Therefore, a positioning pin is required on the brake wheel to limit the rotation range of the brake wheel. In short, the brake wheel is different from the ordinary universal wheel. It cannot achieve 360° rotation. Therefore, the brake wheel can only move the children's chair in a straight line, and it is difficult to make the children's chair rotate. The movement of the children's chair becomes very rigid.

[0005] It can be seen from this that using brake wheels on children's chairs is not a preferred solution. Summary of the Invention

[0006] In order to solve the above-mentioned technical problems, the present invention provides a seat, including a base, rollers arranged under the base, a seat arranged above the base, a lifting drive member arranged between the seat and the base, a support member arranged on the lifting drive member, a brake part arranged at the lower end of the support member, and a footrest member arranged on the support member; wherein the lifting drive member can be used to adjust the height of the seat, the footrest member is linked with the brake part, and the footrest member is configured to be rested on by the foot and serves as a starting member for the downward movement of the brake part; in the movable state, the footrest member, the support member and the brake part are all vacant, only the roller touches the ground and can roll, so that the seat can move; in the locked state, the foot rests on the footrest member, the footrest member drives the brake part to move downward and causes the brake part to touch the ground and brake, so as to prevent the roller from rolling and the seat from moving, thereby keeping the seat stable; thereby replacing the braking function of the brake roller and saving costs.

[0007] A seat is also provided, in which a support member is arranged on a seat, which can also achieve the same effect.

[0008] The technical solution of the present utility model is achieved as follows:

[0009] A seat, comprising:

[0010] base;

[0011] A roller is arranged below the base;

[0012] A seat is configured for a person to sit on, and the seat is arranged above the base;

[0013] A lifting drive member is provided between the base and the seat, wherein the lower end of the lifting drive member is connected to the base and the upper end is connected to the seat; the lifting drive member is configured to adjust the height of the seat;

[0014] A support member, arranged on the lifting drive member;

[0015] a brake portion, arranged at the lower end portion of the support member;

[0016] A pedal member is provided on the support member and is linked to the brake member; the pedal member is configured to be rested on by the foot and serves as a trigger member for the downward movement of the brake member;

[0017] It also has a movable state and a locked state: in the movable state, the pedal part, the support part and the brake part are vacant, the roller can roll, and the seat can move; in the locked state, the pedal part moves downward in response to external force and drives the brake part to move downward until the brake part touches the ground and brakes.

[0018] The lifting drive member is generally a gas rod, which can realize the lifting of the chair seat at a low cost; the support member is additionally arranged on the gas rod, and its main function is to install and support the footrest member and put the footrest member in a suitable position for resting the feet. The brake part is linked with the footrest member, and in the movable state, the footrest member, the support member, and the brake part are vacant, so that the seat can move. In the locked state, the footrest member moves downward to drive the brake part to touch the ground, thereby achieving braking, preventing the seat from moving, and keeping the seat stable, thereby realizing the function of the brake wheel; such a structure is simple and low in cost, which greatly improves the efficiency of the manufacturer. In particular, the brake roller is no longer used. The operation of locking and unlocking the brake in this solution is more convenient. There is no need to get up or bend over to operate. The brake can be achieved by simply stepping on the footrest member, and the unlocking can be achieved by leaving the footrest member; moreover, the interference problem between the brake wheel and the base is solved, so that the roller can be steered flexibly and the chair is more flexible when moving.

[0019] A seat, comprising:

[0020] base;

[0021] A roller is arranged below the base;

[0022] A seat is configured for a person to sit on, and the seat is arranged above the base;

[0023] A lifting drive member is provided between the base and the seat, wherein the lower end of the lifting drive member is connected to the base and the upper end is connected to the seat; the lifting drive member is configured to adjust the height of the seat;

[0024] a support member, disposed on the seat;

[0025] a brake portion, arranged at the lower end portion of the support member;

[0026] A pedal member is provided on the support member and is linked to the brake member; the pedal member is configured to be rested on by the foot and serves as a trigger member for the downward movement of the brake member;

[0027] It also has a movable state and a locked state: in the movable state, the pedal part, the support part and the brake part are vacant, the roller can roll, and the seat can move; in the locked state, the pedal part moves downward in response to external force and drives the brake part to move downward until the brake part touches the ground and brakes.

[0028] The support member in the seat is arranged on the seat, which can also achieve the same effect.

[0029] Preferably, the support member is an L-shaped rod, comprising a horizontal rod and a vertical rod, the pedal member and the brake part are both arranged on the vertical rod. The vertical rod is used to mount the pedal member and the brake part, and the horizontal rod protrudes toward the front of the gas rod so that the pedal member is in a position suitable for placing the feet.

[0030] Preferably, the brake portion is a sleeve, connected to the pedal member and protruding downward from the pedal member. The brake portion is sleeved on the vertical rod and is slidable up and down relative to the vertical rod. When switching from the movable state to the locked state, the pedal member responds to an external force and drives the brake portion to slide downward on the vertical rod, causing the brake portion to contact the ground and brake. The brake portion is a sleeve and sleeved on the vertical rod. The brake portion can slide up and down on the vertical rod. The pedal member and the brake portion are connected to achieve a linkage between the two, so that when the pedal member is stepped on, the brake portion can slide downward on the vertical rod until it contacts the ground, thereby achieving the braking function.

[0031] Preferably, an elastic member is provided between the brake portion and the vertical rod. The elastic member can be a spring, which directly contacts the brake portion and the vertical rod and gives the brake portion an upward elastic force, so that the brake portion is freed in the movable state.

[0032] Preferably, the horizontal bar is hinged to the vertical bar, the vertical bar tilts forward and downward from top to bottom, the brake portion is provided at the lower end of the vertical bar, and the footrest is provided on the vertical bar; when switching from the movable state to the locked state, the footrest responds to an external force and drives the vertical bar to rotate downward, causing the brake portion to contact the ground and brake; an elastic member is provided at the hinge between the horizontal bar and the vertical bar, which applies an upward elastic force to the vertical bar. The elastic member is a torsion spring, and in the movable state, the elastic member applies elastic force to the vertical bar, causing the vertical bar to tilt to its lower end and the brake portion to lift and maintain this tilt to prevent the movement of the seat from being affected; in the locked state, the vertical bar is driven by the footrest to rotate downward, its tilt angle becomes smaller, and its lower end is closer to the ground, and the brake portion is at the lower end of the vertical bar. When the brake portion descends to contact the ground, the braking function is realized; in this solution, the footrest can also be raised and lowered on the vertical bar.

[0033] Preferably, the support member is an L-shaped rod comprising a horizontal rod and a vertical rod. The support member is rotatably connected to the lifting drive member, and the vertical rod tilts downward and forward from top to bottom. The brake portion is disposed at the lower end of the vertical rod, and the footrest is disposed on the vertical rod. When switching from the movable state to the locked state, the footrest responds to an external force and drives the support member to rotate downward, causing the brake portion to contact the ground and brake. Similar to the above solution, however, the support member rotates as a whole.

[0034] Preferably, the support member is an L-shaped rod, which includes a horizontal rod and a vertical rod. The support member is rotatably connected to the seat, and the vertical rod is tilted from top to bottom and forward. The brake part is arranged at the lower end of the vertical rod, and the foot pedal is arranged on the vertical rod; when switching from the movable state to the locked state, the foot pedal responds to the external force to drive the support member to rotate downward, and the brake part touches the ground to brake.

[0035] Preferably, an elastic member is provided at the rotation position of the support member, and the elastic member gives the support member an upward elastic force. The elastic member is a torsion spring, which provides the elastic force to make the vertical rod and the brake part fly.

[0036] Preferably, the support member is a vertically disposed rod disposed vertically below the seat, and the brake portion is a sleeve disposed on the vertical rod and slidably disposed up and down relative to the support member. When switching from a movable state to a locked state, the footrest responds to an external force and drives the brake portion to slide downward on the support member, causing the brake portion to contact the ground and brake. When the support member is disposed on the seat, a crossbar is not required to provide forward clearance for the footrest, and the footrest can still be positioned in a suitable footrest position.

[0037] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0038] The lifting drive member is generally a gas rod, which can realize the lifting of the chair seat at a low cost; the support member is additionally arranged on the gas rod, and its main function is to install and support the footrest member and put the footrest member in a suitable position for resting the feet. The brake part is linked with the footrest member, and in the movable state, the footrest member, the support member, and the brake part are vacant, so that the seat can move. In the locked state, the footrest member moves downward to drive the brake part to touch the ground, thereby achieving braking, preventing the seat from moving, and keeping the seat stable, thereby realizing the function of the brake wheel; such a structure is simple and low in cost, which greatly improves the efficiency of the manufacturer. In particular, the brake roller is no longer used. The operation of locking and unlocking the brake in this solution is more convenient. There is no need to get up or bend over to operate. The brake can be achieved by simply stepping on the footrest member, and the unlocking can be achieved by leaving the footrest member; moreover, the interference problem between the brake wheel and the base is solved, so that the roller can be steered flexibly and the chair is more flexible when moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the three-dimensional structure of the seat in Example 1 of the present invention;

[0040] Figure 2 This is a side view of the seat in the movable state in Example 1 of the present invention;

[0041] Figure 3 This is a side view of the seat in the locked state in Example 1 of the present invention;

[0042] Figure 4 This is a schematic diagram of the principle of switching the seat between the movable state and the locked state in Example 1 of the present invention;

[0043] Figure 5 This is a side view of the seat in the movable state in Example 2 of the present invention;

[0044] Figure 6 This is a side view of the seat in the locked state in Example 2 of the present invention.

[0045] Figure 7This is a side view of the seat in the movable state in Example 3 of the present invention;

[0046] Figure 8 This is a side view of the seat in the locked state in Example 3 of the present invention;

[0047] Figure 9 This is a side view of the seat in a movable state in Example 4 of the present invention;

[0048] Figure 10 This is a side view of the seat in the locked state in Example 4 of the present invention;

[0049] Figure 11 This is a schematic diagram of the principle of the support member rotating on the gas rod in Example 4 of the present utility model;

[0050] Figure 12 This is a schematic diagram showing the principle of the support member rotating on the gas rod and the vertical rod rotating equivalently to the horizontal rod in Example 4 of the present invention.

[0051] The reference numerals of the figures are: base 1; roller 2; footrest 3; seat 4; gas rod 5; support member 6; crossbar 61; vertical rod 62; brake part 7; friction pad 8; elastic sheet 9. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0054] In the description of the present invention, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0055] The specific implementation of the utility model is as follows: Example

[0056] like Figure 1-4 As shown, the utility model provides a seat, comprising:

[0057] Base 1;

[0058] Roller 2, arranged below roller 2;

[0059] The seat 4 is configured for a person to sit on, and the seat 4 is arranged above the base 1;

[0060] A lifting drive member is provided between the base 1 and the seat 4, wherein the lower end of the lifting drive member is connected to the base 1 and the upper end is connected to the seat 4; the lifting drive member is configured to adjust the height of the seat 4;

[0061] A support member 6 is provided on the lifting drive member;

[0062] a brake portion 7, provided at the lower end of the support member 6;

[0063] The pedal member 3 is provided on the support member 6 and is linked to the brake member 7; the pedal member 3 is configured to be rested on by the foot and serves as a trigger for the downward movement of the brake member 7;

[0064] It also has a movable state and a locked state: in the movable state, the pedal member 3, the support member 6 and the brake part 7 are vacant, the roller 2 can roll, and the seat can move; in the locked state, the pedal member 3 moves downward in response to external force and drives the brake part 7 to move downward until the brake member touches the ground and brakes.

[0065] The lifting drive member is generally a gas rod 5, which can realize the lifting of the chair seat 4 at a low cost; the support member 6 is additionally arranged on the gas rod 5, and its main function is to install and support the footrest member 3 and to put the footrest member 3 in a suitable position for resting the feet. The brake part 7 is linked with the footrest member 3, and in the movable state, the footrest member 3, the support member 6, and the brake part 7 are vacant, so that the seat can move. In the locked state, the footrest member 3 moves downward to drive the brake part 7 to touch the ground, thereby achieving braking, preventing the seat from moving, and keeping the seat stable, thereby achieving the function of the brake wheel; such a structure is simple and low in cost, which greatly improves the efficiency of the manufacturer, especially the brake roller 2 is no longer used. The operation of locking and unlocking the brake in this scheme is more convenient, and there is no need to get up or bend over to operate. The brake can be achieved by simply stepping on the footrest member 3, and the unlocking can be achieved by leaving the footrest member 3; moreover, the interference problem between the brake wheel and the base 1 is solved, so that the steering of the roller 2 is flexible, and the chair is more flexible when moving.

[0066] Specifically, the support member 6 is an L-shaped rod, which includes a horizontal rod 61 and a vertical rod 62. The footrest member 3 and the brake part 7 are both arranged on the vertical rod 62, and the footrest member 3 is arranged in the middle and lower part of the vertical rod 62. The brake part 7 is arranged at the lower end of the vertical rod 62 and protrudes downward from the vertical rod 62. A friction pad 8 is provided at the lower end of the brake part 7 to increase the friction when touching the ground, further maintain the stability of the seat, and prevent the floor from being scratched; the vertical rod 62 is used to install the footrest member 3 and the brake part 7, and the horizontal rod 61 protrudes toward the front of the gas rod 5 to make the footrest member 3 in a position suitable for placing the feet.

[0067] Furthermore, the crossbar 61 is hinged to the vertical bar 62, and the vertical bar 62 tilts forward from top to bottom. When the movable state is switched to the locked state, the pedal member 3 responds to the external force to drive the vertical bar 62 to rotate downward, and the brake part 7 touches the ground to brake; an elastic member 9 is provided between the crossbar 61 and the vertical bar 62 at the hinge between the two, and the elastic member 9 gives the vertical bar 62 an upward elastic force; the elastic member 9 is a torsion spring. In the movable state, the elastic member 9 gives the vertical bar 62 an elastic force, so that the vertical bar 62 tilts to its lower end and the brake part 7 lifts The vertical rod 62 is rotated downward by the pedal member 3, and its tilt angle becomes smaller, and the lower end is closer to the ground. The brake part 7 is at the lower end of the vertical rod 62. When the brake part 7 drops to contact the ground, the braking function can be realized. The cross bar 61 and the vertical rod 62 are hinged by a rotating shaft. The rotating shaft is located at the front end of the vertical rod 62 and the upper end of the vertical rod 62. The elastic member 9 is arranged on the rotating shaft and gives the vertical rod 62 an upward elastic force.

[0068] In this solution, the footrest 3 can be raised and lowered on the vertical rod 62, and can be rotated on the vertical rod 62, which can not only adjust the height of the footrest 3, but also keep the footrest 3 level, thereby increasing the comfort of the feet. This point is not the focus of this embodiment and is relatively common, so it will not be elaborated here.

[0069] In addition to being arranged on the gas rod 5, the support member 6 can also be arranged on the seat 4. The solution adopted in this embodiment enables the two arrangements to achieve the same effect, so the situation of being arranged on the seat 4 will not be repeated.

[0070] Example 2: The only difference between this example and Example 1 is that the brake part 7 is a sleeve, the vertical rod 62 and the horizontal rod 61 cannot rotate, and the brake part 7 is sleeved and lifted on the vertical rod 62.

[0071] Specifically, if Figure 5 、 6 As shown, the brake part 7 is a sleeve, which is connected to the pedal member 3 and protrudes downward from the pedal member 3. The brake part 7 is sleeved on the vertical rod 62 and slides up and down relative to the vertical rod 62. In the movable state, the brake part 7 is in a higher position on the vertical rod 62 and is also suspended from the ground; when switching from the movable state to the locked state, the pedal member 3 responds to the external force to drive the brake part 7 to slide downward on the vertical rod 62, and the brake part 7 touches the ground to brake, that is, the brake part 7 moves downward on the vertical rod 62 until its lower end abuts the ground to achieve braking; the brake part 7 is connected to the pedal member 3 to realize the linkage between the two, so that when the pedal member 3 is stepped on, the brake part 7 can slide downward on the vertical rod 62 until it abuts the ground.

[0072] An elastic member (not shown) is provided between the brake part 7 and the vertical rod 62. The elastic member is a spring, which directly abuts against the brake part 7 and the vertical rod 62 and gives the brake part 7 an upward elastic force, so that the brake part 7 is lifted into the air in the movable state. The setting of the elastic member is relatively common. For example, the vertical rod 62 is hollow and has a slide groove. The brake part 7 has a convex portion protruding toward the slide groove. A spring is provided in the vertical rod 62, and the spring abuts against the convex portion and the inner surface of the end of the vertical rod 62. Therefore, it will not be described in detail.

[0073] Embodiment 3: The only difference between this embodiment and embodiment 2 is that the support member 6 is a vertical rod and is arranged on the seat 4.

[0074] Specifically, if Figure 7 、 8 As shown, the support member 6 is a vertically arranged rod, and the support member 6 is vertically arranged below the seat 4. The brake part 7 is a sleeve, and the brake part 7 is sleeved on the vertical rod 62 and is slidable up and down relative to the support member 6; when switching from the movable state to the locked state, the footrest member 3 responds to the external force to drive the brake part 7 to slide downward on the support member 6, and the brake part 7 touches the ground and brakes; when the support member 6 is set on the seat 4, there is no need to set the cross bar 61 to provide a forward distance for the footrest member 3, and the footrest member 3 can also be in a position suitable for resting the feet.

[0075] Example 4: The only difference between this example and Example 1 is that the support member 6 is rotatably connected to the gas rod 5, and the horizontal rod 61 and the vertical rod 62 cannot rotate.

[0076] Specifically, if Figure 9-11 As shown, the support member 6 is an L-shaped rod, which includes a horizontal rod 61 and a vertical rod 62. The support member 6 is rotatably connected to the gas rod 5, and the vertical rod 62 is tilted from top to bottom and forward. The brake part 7 is arranged at the lower end of the vertical rod 62, and the pedal member 3 is arranged on the vertical rod 62; when switching from the movable state to the locked state, the pedal member 3 responds to the external force to drive the support member 6 to rotate downward, and the brake part 7 touches the ground to brake; the same as the above scheme, but the support member 6 rotates as a whole; an elastic member is provided at the rotation position of the support member 6, and the elastic member gives the support member 6 an upward elastic force; the elastic member is a torsion spring to provide an elastic force to make the vertical rod 62 and the brake part 7 empty.

[0077] In addition to the effects achieved by implementing Example 1 and Example 4 separately, the same effects can be achieved by combining Examples 1 and 4, that is, the crossbar 61 and the vertical rod 62 are rotated while the crossbar 61 is also rotated and connected to the gas rod 5. Figure 12 shown.

Claims

1. A seat, characterized in that: include: base; A roller is arranged below the base; A seat is configured for a person to sit on, and the seat is arranged above the base; A lifting drive member is provided between the base and the seat, wherein the lower end of the lifting drive member is connected to the base and the upper end is connected to the seat; the lifting drive member is configured to adjust the height of the seat; A support member, arranged on the lifting drive member; a brake portion, arranged at the lower end portion of the support member; A pedal member is provided on the support member and is linked to the brake member; the pedal member is configured to be rested on by the foot and serves as a trigger member for the downward movement of the brake member; It also has a movable state and a locked state: in the movable state, the pedal part, the support part and the brake part are vacant, the roller can roll, and the seat can move; in the locked state, the pedal part moves downward in response to external force and drives the brake part to move downward until the brake part touches the ground and brakes.

2. The seat according to claim 1, characterized in that: The support member is an L-shaped rod, which includes a horizontal rod and a vertical rod. The support member is rotatably connected to the lifting drive member, and the vertical rod is tilted forward from top to bottom. The brake part is arranged at the lower end of the vertical rod, and the foot pedal is arranged on the vertical rod; when switching from the movable state to the locked state, the foot pedal responds to the external force to drive the support member to rotate downward, and the brake part touches the ground to brake; an elastic member is provided at the rotation position of the support member, and the elastic member gives the support member an upward elastic force.

3. A seat, characterized in that: include: base; A roller is arranged below the base; A seat is configured for a person to sit on, and the seat is arranged above the base; A lifting drive member is provided between the base and the seat, wherein the lower end of the lifting drive member is connected to the base and the upper end is connected to the seat; the lifting drive member is configured to adjust the height of the seat; a support member, disposed on the seat; a brake portion, arranged at the lower end portion of the support member; A pedal member is provided on the support member and is linked to the brake member; the pedal member is configured to be rested on by the foot and serves as a trigger member for the downward movement of the brake member; It also has a movable state and a locked state: in the movable state, the pedal part, the support part and the brake part are vacant, the roller can roll, and the seat can move; in the locked state, the pedal part moves downward in response to external force and drives the brake part to move downward until the brake part touches the ground and brakes.

4. The seat according to claim 1 or 3, characterized in that: The supporting member is an L-shaped rod, which includes a horizontal rod and a vertical rod. The pedal member and the brake part are both arranged on the vertical rod.

5. The seat according to claim 4, characterized in that: The brake part is a sleeve, which is connected to the pedal part and protrudes downward from the pedal part. The brake part is sleeved on the vertical rod and slides up and down relative to the vertical rod. When switching from the movable state to the locked state, the pedal part responds to external force to drive the brake part to slide downward on the vertical rod, and the brake part touches the ground to brake.

6. The seat according to claim 5, characterized in that: An elastic member is provided between the brake part and the vertical rod.

7. The seat according to claim 4, characterized in that: The horizontal rod is hinged to the vertical rod, and the vertical rod is tilted from top to bottom and forward. The brake part is arranged at the lower end of the vertical rod, and the pedal is arranged on the vertical rod; when switching from the movable state to the locked state, the pedal responds to the external force to drive the vertical rod to rotate downward, and the brake part touches the ground to brake; an elastic part is provided between the horizontal rod and the vertical rod at the hinge between the two, and the elastic part gives the vertical rod an upward elastic force.

8. The seat according to claim 3, characterized in that: The support member is an L-shaped rod, which includes a horizontal rod and a vertical rod. The support member is rotatably connected to the seat, and the vertical rod is tilted from top to bottom and forward. The brake part is arranged at the lower end of the vertical rod, and the foot pedal is arranged on the vertical rod; when switching from the movable state to the locked state, the foot pedal responds to the external force to drive the support member to rotate downward, and the brake part touches the ground to brake.

9. The seat according to claim 8, characterized in that: An elastic member is provided at the rotation position of the support member, and the elastic member gives the support member an upward elastic force.

10. The sitting device according to claim 3, characterized in that: The support member is a vertically arranged rod, which is vertically arranged under the seat. The brake part is a sleeve, which is sleeved on the vertical rod and slides up and down relative to the support member. When switching from the movable state to the locked state, the foot pedal responds to external force to drive the brake part to slide downward on the support member, and the brake part touches the ground to brake.

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