Simple pedal adjusting mechanism and seat

Abstract

The utility model discloses a simple pedal adjusting mechanism and a seat, the simple pedal adjusting mechanism comprises two seat legs in bilateral symmetry and a pedal body detachably connected between the two seat legs, the left side wall and the right side wall of the pedal body are provided with limiting grooves, and the seat leg on each side is provided with a plurality of limiting protrusions clamped and matched with the limiting grooves in the length direction; or, the left side wall and the right side wall of the pedal body extend outwards to form limiting protrusions, and a plurality of limiting grooves matched with the limiting protrusions in a clamped mode are formed in the chair leg on each side in the length direction; the rear end of the pedal body further extends towards the left side and the right side to form abutting parts, when the pedal body is connected to the chair legs, the limiting protrusions are clamped into the limiting grooves, and the abutting parts abut against the rear ends of the chair legs. According to the simple pedal adjusting mechanism and the seat provided by the invention, the pedal body is relatively simple and convenient to mount and dismount; moreover, the pedal body can be manufactured and formed by only one set of mold, so that the seat is few in used parts during assembly, convenient to operate and low in cost required by processing and manufacturing.

Description

Technical Field

[0001] The utility model generally relates to the technical field of seats, and in particular to a simple pedal adjustment mechanism and a seat. Background Art

[0002] As is known to all, due to the short legs of children, their feet often cannot touch the ground when they sit on the seat. If they sit for a long time with their legs hanging in the air, they are prone to sit crooked without stable support, which affects the development of their lumbar spine and spine. In order to solve the above problem, existing seats often have a footrest installed on the chair legs to provide stable support for the feet, thereby helping children correct their sitting posture. In addition, in order to adapt to the rapid growth of children, the footrest of existing seats usually has a height adjustment function.

[0003] For example, an existing patent provides a footrest mechanism for a children's learning chair with a quick adjustment function (application number: CN202322210018.1). The footrest slides up and down to fit the bracket. The footrest is plugged into the locking member on the operating member and the limiting hole on the bracket to adjust the height. Although this solution can achieve height adjustment of the footrest, it is necessary to set small parts such as operating members, locking members, and elastic reset members on the footrest, which makes the assembly operation of the footrest not only complicated, but also many small parts need to be processed and manufactured separately, which will also increase the manufacturing cost of the seat.

[0004] The prior art also provides a chair leg and study chair with an adjustable height footrest (application number: CN201811411512.1), which is achieved by sleeve-connecting a slider on the gas pressure rod of the seat, connecting the side wall of the slider with a slider, connecting the right end of the slider with a pedal, and adjusting the tightness between the slider and the gas pressure rod by a fixing bolt, so that the height of the footrest can be adjusted. Although this solution can achieve the height adjustment of the footrest, it is necessary to repeatedly screw the fixing bolt to control the tightness between the slider and the gas pressure rod when adjusting the height, which makes the height adjustment operation more cumbersome and inconvenient.

[0005] In summary, how to reduce the number of parts required to be installed on the pedal while ensuring that the pedal height is adjustable, and how to make the pedal assembly operation and height adjustment operation simple and convenient has become the main problem that needs to be solved at present. Summary of the invention

[0006] In view of the above-mentioned defects or shortcomings in the prior art, it is desired to provide a simple footrest adjustment mechanism and a seat, by arranging a limit protrusion and a limit groove that fit together between the footrest body and the chair leg for connection, and by abutting the chair leg for positioning through the abutting parts on both sides of the footrest body, so that the installation and disassembly operations of the footrest body are relatively simple, and it is also convenient to adjust the gear position of the footrest body; and the footrest body, the abutting part and the limit groove or the limit protrusion are integrally formed, and the footrest body only needs one set of molds to be manufactured and formed, so that the seat uses fewer parts during assembly, the operation is convenient, and the cost required for processing and manufacturing is also relatively low.

[0007] The effect of the utility model is achieved in this way:

[0008] In the first aspect, the present application provides a simple footrest adjustment mechanism, comprising two left-right symmetrical chair legs and a footrest body detachably connected between the two chair legs, the left and right side walls of the footrest body are provided with limiting grooves, and each side leg is provided with a number of limiting protrusions along the length direction that are snap-fitted with the limiting grooves; or, the left and right side walls of the footrest body extend limiting protrusions outwardly, and each side leg is provided with a number of limiting grooves along the length direction that are snap-fitted with the limiting protrusions; the rear end of the footrest body also extends abutting portions toward the left and right sides, and when the footrest body is connected to the chair legs, the limiting protrusions are snapped into the limiting grooves, and the abutting portions abut against the rear ends of the chair legs, thereby maintaining the footrest body in a stable supporting state.

[0009] Furthermore, the left and right side walls of the footrest body are respectively formed with connecting parts, the limiting grooves are arranged in the connecting parts, and the limiting protrusions are arranged on the inner side of the chair legs. By arranging the limiting protrusions on the inner side of the chair legs, the grooves are avoided from affecting the strength of the chair legs, and the stability of the seat is ensured.

[0010] Furthermore, the connection part is formed by the left and right side walls of the pedal body extending upward, and a clamping part is extended from the connection part in the width direction away from the pedal body, and the clamping part is a U-shaped plate-like structure, and the vacant part surrounded by the middle of the clamping part is a limiting groove, and the opening of the clamping part is set downward. The limiting groove is set in the connection part formed by the pedal body extending upward, so that the vertical position of the rotation fulcrum of the pedal body is higher, and the resistance arm between the rotation fulcrum and the abutment part becomes longer, so that when the front end of the pedal body is pressed, the pressure on the abutment part is smaller, and the strength requirement of the abutment part is lower, thereby improving the support stability of the pedal body.

[0011] Furthermore, the clamping part includes an upper limit plate, a vertical plate extends downward from the front end of the upper limit plate, and the abutting part is formed at the rear end of the upper limit plate and is arranged opposite to the vertical plate at a distance, and the abutting part extends outwardly beyond the upper limit plate along the width direction of the pedal body to abut against the rear end of the chair leg; the vertical plate, the abutting part, the upper limit plate and the connecting part are integrally formed, making the overall structure of the pedal body simpler and more integrated, not only beautiful, but also convenient for mold casting.

[0012] Furthermore, the clamping part includes an upper limit plate, and vertical plates extend downwardly from both ends of the upper limit plate, and the abutting part and the vertical plate on the rear side are arranged at a front-to-back interval, and the width of the abutting part is greater than the vertical plate so as to abut against the rear end of the chair leg, so that the interval between the two vertical plates can be set shorter, that is, the width of the limiting groove can be narrower, so that the limiting protrusion can be more stably clamped in the limiting groove.

[0013] Furthermore, a limiting member is arranged in the limiting groove, and the distance between the limiting member and the limiting groove wall is smaller than the width of the limiting protrusion. When the limiting protrusion is inserted into the limiting groove, the limiting protrusion is clamped between the limiting groove and the limiting member. When the pedal body is affected by external force, the limiting protrusion is clamped by the limiting member and the limiting groove and is not easy to fall out therefrom, thereby further improving the stability of the pedal body support.

[0014] Furthermore, the chair legs are tilted forward and downward, so that when the height of the footrest body is adjusted upward or downward, the footrest body also moves backward or forward in the horizontal direction. The position of the footrest body when adjusted fits the position of the child's feet when growing up, ensuring that the child's feet are supported by the footrest body, making the seat more ergonomic.

[0015] Furthermore, the inclination angle of the chair legs relative to the horizontal plane is 40-80 degrees, which not only allows the position of the footrest body on the chair legs to be adjusted to meet the change in the foot size of the child as he grows, but also ensures that the center of the entire seat can fall within the support area formed by the chair legs, thereby ensuring the stability of the seat.

[0016] In the second aspect, the present application provides a chair, including two symmetrical chair legs and a simple footrest adjustment mechanism, wherein the chair is only provided with two chair legs, the chair legs are long strip structures, and the angle formed between the chair legs and the chair legs is an acute angle. The center of the chair can fall within the support area formed by the two chair legs, which not only ensures the support of the chair, but also makes the appearance of the chair more simple and beautiful.

[0017] Furthermore, the chair also includes a back support, which is configured to connect to the backrest. The back support and the chair legs on both sides are connected to form a bent U-shaped rod, so that the appearance of the chair is more integrated and has a simple aesthetic.

[0018] The simplified footrest adjustment mechanism and seat provided by the present application are connected by arranging mutually engaging limiting protrusions and limiting grooves between the footrest body and the chair legs, and are positioned by abutting against the chair legs by the abutting parts on both sides of the footrest body. The connection structure is simple, which makes the installation and disassembly of the footrest body relatively simple and also convenient for adjusting the gear position of the footrest body. In addition, the footrest body, the abutting part and the limiting groove or limiting protrusion are integrally formed, and there is no need to set additional parts on the footrest body, and the footrest body can be manufactured with only one set of molds, so that the seat uses fewer parts during assembly, is easy to operate, and the cost required for processing and manufacturing is also relatively low. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0020] Figure 1 A schematic diagram of the three-dimensional structure of a seat provided in an embodiment of the present application;

[0021] Figure 2 A schematic diagram of the back structure of a seat provided in an embodiment of the present application;

[0022] Figure 3 A schematic diagram of the connection structure between the footrest body and the chair legs provided in an embodiment of the present application;

[0023] Figure 4 A schematic diagram of the side structure of the seat when the footrest body provided in the embodiment of the present application is adjusted to the highest position;

[0024] Figure 5 A schematic diagram of the side structure of the seat when the footrest body provided in the embodiment of the present application is adjusted to the lowest position;

[0025] Figure 6 A schematic diagram of the three-dimensional structure of the pedal body provided in an embodiment of the present application;

[0026] Figure 7 A schematic diagram of the side structure of the pedal body when the abutment portion and the vertical plate are spaced apart from each other according to an embodiment of the present application;

[0027] Figure 8 A schematic diagram of the side structure of the pedal body when the limiting member provided in the embodiment of the present application is a wave plate;

[0028] Fig. 9 Schematic diagram of the side structure of the pedal body when the limiting member provided in the embodiment of the present application is a hemispherical protrusion

[0029] Fig.10 This is a schematic diagram of the three-dimensional structure of the back support and chair legs provided in an embodiment of the present application.

[0030] The figures are marked as follows: 1- footrest body, 110- limiting groove, 120- abutment portion, 130- connecting portion, 131- clamping portion, 132- upper limit plate, 133- vertical plate, 140- limiting member, 2- chair leg, 210- limiting protrusion, 3- chair foot, 4- back support, 5- backrest. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant utility model, rather than to limit the utility model. It is also necessary to explain that, for ease of description, only the parts related to the utility model are shown in the accompanying drawings.

[0032] Please refer to the attached Figure 1-10 The embodiment of the present application provides a simple footrest adjustment mechanism, including two left-right symmetrical chair legs 2 and a footrest body 1 detachably connected between the two chair legs 2, the left and right side walls of the footrest body 1 are provided with limiting grooves 110, and each side leg 2 is provided with a plurality of limiting protrusions 210 that are engaged with the limiting grooves 110 along the length direction; or, the left and right side walls of the footrest body 1 extend outwardly with limiting protrusions 210, and each side leg 2 is provided with a plurality of limiting grooves 110 that are engaged with the limiting protrusions 210 along the length direction; the rear end of the footrest body 1 also extends abutting portions 120 toward the left and right sides, and when the footrest body 1 is connected to the chair leg 2, the limiting protrusions 210 are engaged in the limiting grooves 110, and the abutting portions 120 abut against the rear ends of the chair legs 2, so that the footrest body 1 maintains a stable supporting state.

[0033] In the embodiment, a limit protrusion 210 and a limit groove 110 that are engaged with each other are provided between the footrest body 1 and the chair leg 2 for connection, and the abutting portions 120 on both sides of the footrest body 1 abut against the chair leg 2 for positioning. The connection structure is simple, which makes the installation and disassembly operations of the footrest body 1 relatively simple, and also facilitates the gear adjustment of the footrest body 1. In addition, the footrest body 1, the abutting portion 120 and the limit groove 110 or the limit protrusion 210 are integrally formed, and there is no need to provide redundant parts on the footrest body 1. The footrest body 1 only requires one set of molds to be manufactured, so that the chair uses fewer parts during assembly, is easy to operate, and the cost required for processing and manufacturing is also relatively low.

[0034] In other embodiments of the present application, the front end of the footrest body 1 may also protrude out of the abutment portions 120 toward both sides, so that the chair leg 2 is clamped between the two abutment portions 120 , further improving the connection stability between the footrest body 1 and the chair leg 2 .

[0035] In some embodiments of the present application, the left and right side walls of the footrest body 1 are respectively formed with a connecting portion 130, the limiting groove 110 is provided in the connecting portion 130, and the limiting protrusion 210 is provided on the inner side of the chair leg 2. By providing the limiting protrusion 210 on the inner side of the chair leg 2, the strength of the chair leg 2 is prevented from being affected by the groove, thereby ensuring the stability of the seat.

[0036] Preferably, three limiting protrusions 210 are provided on each side of the chair leg 2, so that the footrest body 1 has three adjustable gears to meet the use needs of customers. Of course, in other embodiments of the present application, the number of limiting protrusions 210 provided on the chair leg 2 can also be four, five, six, etc.

[0037] Of course, in other embodiments of the present application, the limiting protrusions 210 can be arranged on both sides of the footrest body 1, and the limiting grooves 110 are opened on the inner side surfaces of the chair legs 2.

[0038] In some embodiments of the present application, the connecting portion 130 is formed by extending upward from the left and right side walls of the pedal body 1, and a clamping portion 131 is extended from the connecting portion 130 in the width direction away from the pedal body 1. The clamping portion 131 is a U-shaped plate structure, and the vacant portion surrounded in the middle of the clamping portion 131 is the limiting groove 110, and the opening of the clamping portion 131 is set downward.

[0039] In this embodiment, with the limiting protrusion 210 as a fulcrum, the pedal body 1 can be regarded as a lever. When the pedal body 1 supports the user's foot, the front end of the pedal body 1 is compressed and tends to rotate downward around the limiting protrusion 210, so that the abutment 120 on the rear side of the limiting protrusion 210 is subjected to an upward rotation force. Since the power arm between the front end of the pedal body 1 and the limiting protrusion 210 is longer than the resistance arm between the abutment 120 and the limiting protrusion 210, the abutment 120 is subjected to greater pressure, and the abutment 120 needs to have sufficient strength to withstand the pressure; by arranging the limiting groove 110 or the limiting protrusion 210 on the upwardly extending connecting portion 130, the vertical position of the rotation fulcrum of the pedal body 1 is higher, and the resistance arm between the rotation fulcrum and the abutment 120 becomes longer, so that when the front end of the pedal body 1 is compressed, the abutment 120 is subjected to less pressure, and the strength requirement for the abutment 120 is lower, thereby improving the support stability of the pedal body 1.

[0040] Among them, the clamping part 131 is a U-shaped structure with an opening at the lower end, so that during the installation and disassembly of the pedal body 1, the limiting protrusion 210 can be directly clamped in or out from the opening at the lower end of the clamping part 131, further improving the convenience of the installation and disassembly operations; and when the pedal body 1 is under pressure, the clamping part 131 has a tendency to move downward relative to the limiting protrusion 210. By having an opening at the lower end of the clamping part 131, it can also be avoided that during the support process, the limiting protrusion 210 slides out of the opening of the clamping part 131, affecting the support performance of the pedal body 1.

[0041] In some embodiments of the present application, the clamping portion 131 includes an upper limit plate 132, a vertical plate 133 extends downward from the front end of the upper limit plate 132, and the abutting portion 120 is formed at the rear end of the upper limit plate 132 and is arranged opposite to the vertical plate 133 at a distance, and the abutting portion 120 extends outwardly beyond the upper limit plate 132 along the width direction of the pedal body 1 to abut against the rear end of the chair leg 2; the vertical plate 133, the abutting portion 120, the upper limit plate 132 and the connecting portion 130 are integrally formed. This makes the overall structure of the pedal body 1 simpler and more integrated, not only beautiful, but also convenient for mold casting.

[0042] Please refer to the attached Figure 7 In some embodiments of the present application, the abutting portion 120 can also be spaced apart from the clamping portion 131: the clamping portion 131 includes an upper limit plate 132, and vertical plates 133 extend downward from both the front and rear ends of the upper limit plate 132. The abutting portion 120 and the rear vertical plate 133 are spaced apart from each other, and the width of the abutting portion 120 is greater than the vertical plate 133 so as to abut against the rear end of the chair leg 2. Compared with the abutting portion 120 being directly connected to the upper limit plate 132, the abutting portion 120 and the vertical plate 133 are spaced apart from each other from front to back, so that the interval between the two vertical plates 133 can be set shorter, that is, the width of the limiting groove 110 can be narrower, so that the limiting protrusion 210 can be more stably clamped in the limiting groove 110.

[0043] In some embodiments of the present application, a limiting member 140 is disposed in the limiting groove 110, and the distance between the limiting member 140 and the groove wall of the limiting groove 110 is smaller than the width of the limiting protrusion 210, so that when the limiting protrusion 210 is inserted into the limiting groove 110, the limiting protrusion 210 is clamped between the limiting groove 110 and the limiting member 140. When the pedal body 1 is affected by external force, the limiting protrusion 210 is clamped by the limiting member 140 and the limiting groove 110, and is not easy to fall out therefrom, thereby further improving the support stability of the pedal body 1.

[0044] Please refer to the attached Figure 8 In this embodiment, the limiting member 140 can be a bent corrugated plate. When the limiting protrusion 210 is inserted into the limiting groove 110, the middle part of the corrugated plate is squeezed and deformed, and the limiting protrusion 210 is clamped by the reset elastic force, and the clamping effect is better.

[0045] Please refer to the attached Fig. 9 In this embodiment, the limiting member 140 may also be a hemispherical protrusion protruding from the side wall of the connecting portion 130. When the limiting protrusion 210 is inserted into the limiting groove 110, the limiting leg 210 slides along the spherical surface of the limiting member 140 into between the limiting member and the limiting groove 110 and is clamped by the limiting member 140, making it difficult to fall out of the limiting groove 110.

[0046] In some embodiments of the present application, the chair legs 2 are tilted forward and downward, so that when the height of the footrest body 1 is adjusted upward or downward, the footrest body 1 also moves backward or forward in the horizontal direction.

[0047] In this embodiment, as a child grows, both the calves and thighs will grow, which means that when a child sits on a chair seat, not only will the distance from the child's feet to the ground become shorter, but the horizontal distance between the child's feet and the chair seat will also become longer. This means that if the pedal body 1 can only adjust the vertical height, the child's feet will need to bend inwards after growth in order to step on the pedal body 1, which not only results in a poor sitting experience, but also fails to assist the child in correcting his or her sitting posture. Therefore, by tilting the chair legs 2 downward, when the pedal body 1 is adjusted upward or downward in the vertical direction, it also moves backward or forward in the horizontal direction, so that the position of the pedal body 1 during adjustment fits the position of the child's feet during growth, ensuring that the child's feet are supported by the pedal body 1, making the seat more ergonomic.

[0048] The embodiment of the present application also provides a seat, in which the inclination angle of the chair leg 2 relative to the horizontal plane is 40-80°, which not only allows the position of the footrest body 1 on the chair leg 2 to be adjusted to meet the changing range of the child's feet as the child grows, but also ensures that the center of the entire seat can fall within the support area formed by the chair legs 3, thereby ensuring the stability of the seat.

[0049] The embodiment of the present application also provides a chair, including two left-right symmetrical chair feet 3 and a simple footrest adjustment mechanism. The chair is only provided with two chair legs 2. The chair feet 3 are long strip structures, and the angle between the chair feet 3 and the chair legs 2 is an acute angle.

[0050] In this embodiment, the seat is supported by only two legs 2, and an acute angle is formed between the legs 2 and the feet 3 on each side, so that the center of the seat can fall within the supporting area formed by the two feet 3, which not only ensures the support of the seat, but also makes the appearance of the seat more simple and beautiful.

[0051] In some embodiments of the present application, the chair further comprises a back support 4, which is configured to connect the backrest 5, and the back support 4 and the chair legs 2 on both sides are connected to form a bent U-shaped rod. By connecting the back support 4 and the chair legs 2 as a whole, the appearance of the chair is more integrated and has a simple aesthetic.

[0052] It should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like used above to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means more than three.

[0053] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the utility model involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the concept of the utility model. For example, the above features are replaced with the technical features with similar functions disclosed in the present application (but not limited to) by each other to form a technical solution.

Claims

1. A simple pedal adjustment mechanism, characterized in that: The invention comprises two symmetrical chair legs (2) and a footrest body (1) detachably connected between the two chair legs (2), wherein the left and right side walls of the footrest body (1) are provided with limiting grooves (110), and each side of the chair leg (2) is provided with a plurality of limiting protrusions (210) along the length direction and engaged with the limiting grooves (110); or, the left and right side walls of the footrest body (1) extend outwardly with the limiting protrusions (210), and each side of the chair leg (2) is provided with a plurality of limiting protrusions (210) along the length direction and engaged with the limiting grooves (110); ) are provided with a plurality of limiting grooves (110) along the length direction and are engaged with the limiting protrusions (210); the rear end of the pedal body (1) also extends abutting portions (120) toward the left and right sides; when the pedal body (1) is connected to the chair leg (2), the limiting protrusions (210) are engaged with the limiting grooves (110), and the abutting portions (120) abut against the rear ends of the chair legs (2), thereby maintaining the pedal body (1) in a stable supporting state.

2. The simplified pedal adjustment mechanism according to claim 1, characterized in that: The left and right side walls of the pedal body (1) are respectively formed with connecting parts (130), the limiting groove (110) is provided in the connecting part (130), and the limiting protrusion (210) is provided on the inner side surface of the chair leg (2).

3. The simplified pedal adjustment mechanism according to claim 2, characterized in that: The connecting portion (130) is formed by extending upwards from the left and right side walls of the pedal body (1); the connecting portion (130) is provided with a clamping portion (131) extending in a width direction away from the pedal body (1); the clamping portion (131) is a U-shaped plate structure; a vacant portion surrounded by the clamping portion (131) is the limiting groove (110), and the opening of the clamping portion (131) is arranged downwards.

4. The simplified pedal adjustment mechanism according to claim 3, characterized in that: The clamping portion (131) comprises an upper limit plate (132), a vertical plate (133) extending downward from the front end of the upper limit plate (132), the abutting portion (120) being formed at the rear end of the upper limit plate (132) and being arranged opposite to the vertical plate (133) at a distance, the abutting portion (120) extending outwardly beyond the upper limit plate (132) along the width direction of the pedal body (1) to abut against the rear end of the chair leg (2); the vertical plate (133), the abutting portion (120), the upper limit plate (132) and the connecting portion (130) are integrally formed.

5. The simplified pedal adjustment mechanism according to claim 3, characterized in that: The clamping portion (131) comprises an upper limit plate (132), and vertical plates (133) are extended downwardly at both front and rear ends of the upper limit plate (132). The abutting portion (120) and the vertical plate (133) at the rear side are arranged at a front-to-back interval, and the width of the abutting portion (120) is greater than that of the vertical plate (133) so as to abut against the rear end of the chair leg (2).

6. The simplified pedal adjustment mechanism according to claim 1, characterized in that: A limiting member (140) is disposed in the limiting groove (110); the distance between the limiting member (140) and the groove wall of the limiting groove (110) is smaller than the width of the limiting protrusion (210); when the limiting protrusion (210) is inserted into the limiting groove (110), the limiting protrusion (210) is clamped between the limiting groove (110) and the limiting member (140).

7. The simplified pedal adjustment mechanism according to claim 1, characterized in that: The chair legs (2) are arranged to be tilted forward and downward, so that when the height of the footrest body (1) is adjusted upward or downward, the footrest body (1) also moves backward or forward in the horizontal direction.

8. The simplified pedal adjustment mechanism according to claim 7, characterized in that: The inclination angle of the chair legs (2) relative to the horizontal plane is 40-80°.

9. A seat, characterized in that: The invention comprises two left-right symmetrical chair feet (3) and a simple foot adjustment mechanism as described in any one of claims 1 to 8, wherein the seat is provided with only two chair legs (2), the chair feet (3) are long strip structures, and the angle formed between the chair feet (3) and the chair legs (2) is an acute angle.

10. The seat according to claim 9, characterized in that The chair further comprises a back support (4), wherein the back support (4) is configured to be connected to a backrest (5), and the back support (4) and the chair legs (2) on both sides are connected to form a bent U-shaped rod.

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