Lifting pedal suitable for inclined chair legs and chair

Abstract

The utility model provides a lifting pedal and seat suitable for inclined chair legs, the lifting pedal comprises a pedal, a telescopic component and at least two locking mechanisms, the pedal is used for supporting two feet of a human body and is arranged in the middle of the telescopic component, and the telescopic component can stretch out and draw back along with the change of the distance between the two chair legs during lifting. The two locking mechanisms are mounted at the two ends of the telescopic assembly respectively and used for being selectively locked or unlocked with the chair legs; in the supporting state, the locking mechanism and the chair legs are locked, and the pedal can be kept at the current position; in the adjusting state, the locking mechanism and the chair legs are unlocked, the pedal can ascend and descend, and the telescopic assembly also synchronously and adaptively stretches out and draws back; the chair comprises two chair legs located on the front side and the lifting pedal, and the chair legs incline forwards and outwards from top to bottom. The locking mechanism is arranged on the chair legs in a sleeving manner; each chair leg comprises a fixed part and a movable part, the chair legs can stretch out and draw back through movement of the fixed part and the movable part, and in the adjusting state, the chair legs can stretch out and draw back, and the pedal can ascend and descend.

Description

Technical Field

[0001] The utility model relates to the field of furniture, and particularly relates to a lifting footrest and a seat applicable to inclined chair legs. Background Art

[0002] A children's chair is a type of seat specially designed for children. Compared with ordinary seats, it is more suitable for the body size of children. At the same time, when designing, more attention will be paid to the growth of children and the safety brought by the seat.

[0003] For a children's chair on the market, its chair legs only tilt forward and backward, and are straight and have no tilt in the left - right direction, as disclosed in Chinese Patent Application for Invention CN201810716545.0. However, children are naturally active and sometimes shake from side to side for fun when sitting on the chair. At this time, the center of gravity of the child swings. When the force is too large, it will drive this children's chair to shake together. And because the chair legs do not have the characteristic of spreading outwards, it is easy to tip over in this case, injuring the child and the chair, so the safety is relatively poor.

[0004] Therefore, in order to prevent the above - mentioned situation from causing tipping to the left and right, there are children's chairs on the market with chair legs spreading outwards, that is, the chair legs tilt to both the left and right sides. This kind of children's chair is more stable in the left - right direction. Even if a child sways on it, it is not easy to drive the chair to swing, and it is less likely to tip over, so the safety is greatly improved. However, in this kind of children's chair, since the chair legs tilt in all directions of left - right, front - back, it is difficult to realize the lifting of the footrest.

[0005] In a children's chair, if there is no lifting footrest, the sitting experience and comfort will be relatively poor, and it is not suitable for children with small ages and small body sizes, and it cannot adapt to the growth of children, that is, it cannot be applicable to children of all age stages. Some children's chairs are designed with telescopic chair legs to adapt to the growth of children. This further increases the difficulty of directly installing the lifting footrest on the chair legs. Under this condition, for a children's chair with a lifting footrest, generally a separate vertical rod is set and the lifting footrest is installed on the rod, as disclosed in Chinese Utility Model Patent CN202320518333.8. However, this approach makes the appearance worse and very uncoordinated. Summary of the Invention

[0006] To solve the above technical problems, the present utility model provides a lifting footrest applicable to inclined chair legs, which includes a pedal, a telescopic assembly, and at least two locking mechanisms. The pedal is used to support the human feet and is arranged in the middle of the telescopic assembly. The telescopic assembly is horizontally arranged in the left-right direction and can be telescoped as the distance between the two chair legs changes during lifting. The two locking mechanisms are respectively installed at both ends of the telescopic assembly and are used to selectively lock or unlock with the chair legs. In the support state, the locking mechanism locks with the chair legs and enables the pedal to maintain its current position for supporting the human feet. In the adjustment state, the locking mechanism unlocks from the chair legs, and the pedal can be lifted and lowered while the telescopic assembly also synchronously and adaptively telescopes.

[0007] Furthermore, a seat is provided, which includes two chair legs located at the front side and the above-mentioned lifting footrest. The chair legs are inclined forward and outward from top to bottom. The locking mechanism is sleeved on the chair legs, and the telescopic assembly and the pedal are located between the two chair legs. The chair legs include a fixed part and a movable part, and the telescoping of the chair legs is achieved through the movement of the two. In the adjustment state, the chair legs can be telescoped, and the pedal can be lifted and lowered.

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

[0009] A lifting footrest applicable to inclined chair legs includes:

[0010] A pedal configured to support the human feet, and the pedal is installed in the middle of the telescopic assembly;

[0011] A telescopic assembly horizontally arranged in the left-right direction, and the telescopic assembly is configured to be telescoped as the distance between the two chair legs changes during lifting;

[0012] At least two locking mechanisms are respectively installed at both ends of the telescopic assembly, and the locking mechanism is configured to selectively lock or unlock with the chair legs;

[0013] It also has a support state and an adjustment state. In the support state, the locking mechanism locks with the chair legs and keeps the pedal in the current position. In the adjustment state, the locking mechanism unlocks from the chair legs, and the pedal can be lifted and lowered while the telescopic assembly synchronously and adaptively telescopes.

[0014] In a children's chair that prevents tipping by lying on the outside of the chair legs, to achieve the lifting of the footrest, it is first necessary to adapt to the changing spacing of the chair legs. In this solution, for chair legs with different spacings in the height direction, the smooth lifting of the pedal is achieved through the adaptive expansion and contraction of the telescopic component. When in the adjustment state, dragging the pedal up and down will cause the telescopic component to passively expand and contract, or rather, adaptively expand and contract, to adapt to different chair leg spacings. In the support state, the telescopic component will also maintain its current length to ensure the support stability of the pedal; the structure is simple, the cost is low, but the effect is good, cleverly solving the problem of difficultly setting a lifting footrest on the two outward-lying chair legs. Since the lifting footrest is set on the chair legs, it has strong bearing capacity and high stability, and the appearance is more harmonious and beautiful, meeting the public aesthetic.

[0015] On the premise of preventing tipping and ensuring safety, through the above-mentioned lifting footrest, the most suitable footrest height can be given to children at different ages to adapt to the growth of children.

[0016] Preferably, the telescopic component includes a sleeve and telescopic tubes inserted at both ends of the sleeve. The sleeve is fixedly connected to the pedal, and two locking mechanisms are respectively fixedly connected to the two telescopic tubes; when the telescopic tubes are configured to lift, the telescopic tubes slide within the sleeve to adapt to the change in the spacing between the two chair legs. The way the telescopic component realizes expansion and contraction is the expansion and contraction between the sleeve and the two telescopic tubes. When the pedal is lifted or lowered, the telescopic tubes and the sleeve will not only lift and lower together but also generate relative sliding. At positions where the chair leg spacing is smaller, the telescopic tubes will enter the sleeve more, and at positions where the chair leg spacing is larger, the telescopic tubes will protrude from the sleeve more, thereby realizing the adaptation to the change in the chair leg spacing.

[0017] Preferably, both the sleeve and the telescopic tubes are square tubes. When both the sleeve and the telescopic tubes are square tubes, circumferential limitation is achieved between the sleeve and the telescopic tubes by themselves, that is, the sleeve and the telescopic tubes cannot rotate relative to each other, so that the pedal installed on the sleeve will not rotate, and the support stability of the pedal is stronger.

[0018] Preferably, both the sleeve and the telescopic tubes are round tubes; two limit sliding grooves are provided on the sleeve, and each end of the two telescopic tubes inserted into the sleeve is provided with a limit sliding part. The limit sliding part is located in the limit sliding groove and is configured to prevent the sleeve and the telescopic tubes from rotating. When both the sleeve and the telescopic tubes are round tubes, the sleeve and the telescopic tubes can rotate relative to each other. Although it is beneficial to turn the pedal between the two chair legs during packaging to save packaging and transportation costs, the pedal will rotate with the sleeve in the support state, and stable support cannot be achieved. Therefore, limit sliding grooves and limit sliding parts are respectively provided on the sleeve and the telescopic tubes. After packaging and transportation, the sleeve and the telescopic tubes are limited, so that the pedal will no longer flip, so that the pedal can stably support the human feet; in addition, the limit sliding part is a screw that can be screwed, and tightening the screw can also lock the expansion and contraction of the sleeve and the telescopic tubes.

[0019] Preferably, both the sleeve and the telescopic tube are elliptical tubes, triangular tubes or special-shaped tubes. Similarly, when both the sleeve and the telescopic tube are elliptical tubes, triangular tubes or special-shaped tubes, circumferential limitation is achieved between the sleeve and the telescopic tube by themselves, that is, the sleeve and the telescopic tube cannot rotate relative to each other, so that the pedal mounted on the sleeve will not rotate, and the supporting stability of the pedal is stronger.

[0020] Preferably, the locking mechanism includes a sleeve and a movable piece arranged in the sleeve. An installation seat extends from the sleeve towards the telescopic assembly. The end of the telescopic assembly is inserted into the installation seat and fixedly connected to the installation seat. A knob and a locking piece controlled to retract by the knob are also arranged on the sleeve. The knob is arranged outside the sleeve. One end of the locking piece is fixedly connected to the knob, and the other end of the locking piece abuts against the movable piece. The knob is configured to control the locking piece to move towards the movable piece to make the movable piece squeeze the chair leg, or to control the locking piece to move away from the movable piece to release the chair leg. In the supporting state, the movable piece squeezes the chair leg so that the locking mechanism stays in the current position. In the adjusting state, the movable piece releases the chair leg so that the locking mechanism can move up and down on the chair leg. For a frustum-shaped chair leg with a changing diameter, the locking mechanism can also be locked or unlocked with the chair leg at different diameters, that is, the biggest characteristic of the locking mechanism is that it will not be unable to be locked due to the change of the chair leg diameter. At different diameter positions of the chair leg, the locking mechanism can realize the functions of locking and unlocking. The locking piece is a screw, threadedly connected to the sleeve, and the knob is turned to control the retraction of the locking piece. The retraction of the locking piece can control the movable piece to squeeze or release the chair leg, so as to realize the function of the locking mechanism.

[0021] Preferably, a slit covering portion is further arranged on the movable piece. The slit covering portion protrudes upward from the sleeve, and extends outward along the diameter direction of the sleeve. The slit covering portion is used to cover the gap generated between the movable piece and the sleeve after the movable piece moves radially inward, improving the appearance and making it more plump. There can be two slit covering portions, respectively protruding upward and downward from the sleeve.

[0022] Preferably, the movable piece has elasticity. On the one hand, this facilitates the installation of the movable piece into the sleeve. On the other hand, it can make the movable piece fit the frustum-shaped chair leg, that is, adapt to the changing diameter of the chair leg, increase the contact area, increase the friction force, and also make the gap between the movable piece and the chair leg smaller and more beautiful.

[0023] Preferably, limiting convex points are arranged on the movable piece, and corresponding limiting grooves are arranged on the inner wall of the sleeve. The movable piece is installed in the sleeve and the limiting convex points are located in the limiting grooves. To prevent the relative movement or rotation between the movable piece and the sleeve.

[0024] Preferably, the locking mechanism further includes a gasket disposed in the sleeve and on the side closer to the telescopic assembly. The gasket is also elastic. Compared with the direct contact between the sleeve and the chair leg, the contact between the gasket and the chair leg can be closer, which can eliminate gaps and increase friction, ensuring the stability when the locking mechanism locks with the chair leg and improving the supporting capacity of the pedal.

[0025] Preferably, the locking mechanism is a cam wrench.

[0026] A seat includes two chair legs at the front side and the above-mentioned lifting footrest; two locking mechanisms are respectively sleeved on the two chair legs, the telescopic assembly and the pedal are located between the two chair legs; the chair legs are inclined forward and outward from top to bottom; the chair legs include a fixed part and a movable part, the movable part is sleeved on the lower end of the fixed part and the movable part is arranged to be lifted and lowered on the fixed part; the locking mechanism is sleeved on the movable part. In the supporting state, the locking assembly locks with the movable part. In the adjusting state, the locking assembly unlocks from the movable part and the locking assembly can be lifted and lowered relative to the fixed part. In this seat, the chair legs can also be telescoped to adjust the height of the seat part. By using the above-mentioned lifting footrest, it is not only applicable to the complex situation of this kind of seat (outwardly inclined and telescopic chair legs), but also does not interfere with the telescoping of the chair legs. That is, as long as the locking assembly is unlocked from the chair leg, the movable part can be rotated to realize the telescoping of the chair leg, and at this time the lifting footrest can also be lifted and lowered.

[0027] Preferably, the fixed part and the movable part are threadedly connected. Rotating the movable part can realize the telescoping of the movable part and the fixed part, and realize the lifting and lowering of the chair legs and the seat part, so as to adapt to the body sizes of children of different ages.

[0028] Preferably, the movable part is frustum-shaped, and the diameter of the movable part gradually increases from top to bottom; the locking mechanism is also configured to adapt to different diameters at different positions of the chair leg. Such chair legs are more beautiful and convenient to rotate the movable part. Although the diameter of the movable part is variable, the locking mechanism of the lifting footrest can adapt to the diameter change of the movable part, so that when the locking mechanism locks with the movable part, it is more firm and the supporting capacity of the pedal is stronger.

[0029] The design starting point, concept and beneficial effects of the present utility model adopting the above technical solutions are:

[0030] In a children's chair that prevents tipping by lying on the outside of the chair legs, to achieve the lifting of the footrest, it is first necessary to adapt to the changing distance between the chair legs. In this solution, for chair legs with different distances in the height direction, the smooth lifting of the pedal is achieved through the adaptive expansion and contraction of the telescopic component. When in the adjustment state, dragging the pedal up and down will cause the telescopic component to expand and contract passively, or in other words, adaptively expand and contract, to adapt to different chair leg distances. And in the support state, the telescopic component will also maintain its current length to ensure the support stability of the pedal; the structure is simple, the cost is low, but the effect is good, and it cleverly solves the problem of difficultly setting a lifting footrest on the two outside-lying chair legs. Since the lifting footrest is set on the chair legs, it has strong supporting ability and high stability, and the appearance is more harmonious and beautiful, meeting the public aesthetic.

[0031] At the same time, for chair legs with a frustum shape whose diameter changes, the locking mechanism can also achieve locking or unlocking with the chair legs at different diameters, that is, the greatest characteristic of the locking mechanism is that it will not be unable to lock due to the change in the diameter of the chair legs. At different diameter positions of the chair legs, the locking mechanism can achieve the functions of locking and unlocking.

[0032] On the premise of preventing tipping and ensuring safety, through the above-mentioned lifting footrest, the most suitable footrest height can be given to children at different ages to adapt to the growth of children. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional structural schematic diagram of the seat in Embodiment 1 of the present utility model;

[0034] Figure 2 It is a three-dimensional structural schematic diagram of the seat when the pedal is at the lowest end in Embodiment 1 of the present utility model Figure 1 ;

[0035] Figure 3 It is a three-dimensional structural schematic diagram of the seat when the pedal is at the highest end in Embodiment 1 of the present utility model Figure 1 ;

[0036] Figure 4 It is a three-dimensional structural schematic diagram of the seat when the pedal is at the lowest end in Embodiment 1 of the present utility model Figure 2 ;

[0037] Figure 5 It is a three-dimensional structural schematic diagram of the seat when the pedal is at the highest end in Embodiment 1 of the present utility model Figure 2 ;

[0038] Figure 6 It is a schematic diagram of the pedal lifting in Embodiment 1 of the present utility model;

[0039] Figure 7 It is a front view of the seat in the packaged state in Embodiment 1 of the present utility model

[0040] Figure 8 Schematic three - dimensional structure of the locking assembly adapting to the diameter of the chair leg in Embodiment 1 of the present utility model Figure 1 ;

[0041] Figure 9 Schematic three - dimensional structure of the locking assembly adapting to the diameter of the chair leg in Embodiment 1 of the present utility model Figure 2 ;

[0042] Figure 10 Schematic three - dimensional structure diagram of the movable piece and the gasket located on both sides of the chair leg in Embodiment 1 of the present utility model;

[0043] Figure 11 Schematic three - dimensional structure diagram of the seat when the pedal is at the lowest end in Embodiment 2 of the present utility model;

[0044] Figure 12 Schematic three - dimensional structure diagram of the seat when the pedal is at the uppermost end in Embodiment 2 of the present utility model.

[0045] Each reference numeral is: pedal 1; telescopic assembly 2; telescopic tube 21; sleeve 22; locking mechanism 3; sleeve 31; movable piece 32; gasket 33; chair leg 4; fixed part 41; movable part 42; mounting seat 5; knob 6; locking piece 7; slot - covering part 8; mounting plate 9; reinforcing rib 10; limiting sliding groove 11; limiting sliding part 12. Detailed implementation manners

[0046] In order to more clearly understand the above - mentioned objects, features and advantages of the present utility model, the present utility model will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0047] Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0048] In the description of the present utility model, the terms "first", "second", "third", etc. are only used for the purpose of description and cannot be understood as indicating or implying relative importance.

[0049] The detailed implementation manners of the present utility model are as follows: Embodiment

[0050] As Figures 1-6 shown, the present utility model provides a lifting footrest applicable to an inclined chair leg 4, including:

[0051] The pedal 1 is configured to support the two feet of a human body, and the pedal 1 is installed in the middle of the telescopic component 2;

[0052] The telescopic component 2 is arranged horizontally in the left - right direction. The telescopic component 2 is configured to expand and contract as the distance between the two chair legs 4 changes during lifting;

[0053] At least two locking mechanisms 3 are respectively installed at both ends of the telescopic component 2. The locking mechanism 3 is configured to adapt to different diameters at different positions of the chair leg 4 and selectively lock or unlock with the chair leg 4;

[0054] It also has a support state and an adjustment state. In the support state, the locking mechanism 3 locks with the chair leg 4 and keeps the pedal 1 in the current position; in the adjustment state, the locking mechanism 3 unlocks with the chair leg 4, and the pedal 1 can be lifted and lowered and the telescopic component 2 synchronously expands and contracts adaptively.

[0055] Furthermore, a seat is provided, which includes two chair legs 4 at the front side and the above - mentioned lifting footrest; the two locking mechanisms 3 are respectively sleeved on the two chair legs 4, the telescopic component 2 and the pedal 1 are located between the two chair legs 4; the chair legs 4 are inclined forward and outward from top to bottom; the chair legs 4 include a fixed part 41 and a movable part 42, the movable part 42 is sleeved on the lower end of the fixed part 41 and the movable part 42 is arranged to be lifted and lowered on the fixed part 41; the locking mechanism 3 is sleeved on the movable part 42. In the support state, the locking component locks with the movable part 42, and in the adjustment state, the locking component unlocks with the movable part 42 and the locking component can be lifted and lowered relative to the fixed part 41.

[0056] In a children's chair with outward - leaning chair legs 4 to prevent tipping over, to achieve the lifting of the footrest, it is first necessary to adapt to the changing distance between the chair legs 4. In this solution, for chair legs 4 with different distances in the height direction, the smooth lifting of the pedal 1 is achieved through the adaptive expansion and contraction of the telescopic component 2. When in the adjustment state, dragging the pedal 1 up and down will cause the telescopic component 2 to expand and contract passively, or rather, adaptively expand and contract, to adapt to different distances between the chair legs 4. And in the support state, the telescopic component 2 will also remain at the current length to ensure the support stability of the pedal 1; the structure is simple, the cost is low, but the effect is good, and it cleverly solves the problem of difficultly setting a lifting footrest on two outward - leaning chair legs 4. Since this lifting footrest is set on the chair legs 4, it has strong bearing capacity and high stability, and the appearance is more harmonious and beautiful, meeting the public aesthetic.

[0057] At the same time, for the frustum - shaped chair legs 4 with changing diameters, the locking mechanism 3 can also lock or unlock with the chair legs 4 at different diameters, that is, the greatest characteristic of the locking mechanism 3 is that it will not be unable to lock due to the change in the diameter of the chair legs 4. At different diameter positions of the chair legs 4, the locking mechanism 3 can achieve the functions of locking and unlocking.

[0058] On the premise of preventing tipping and ensuring safety, the above-mentioned lifting footrest can provide the most suitable footrest height for children at different ages to adapt to the growth of children.

[0059] In addition, in this seat, the chair leg 4 can also be telescopic to adjust the height of the seat part. Using the above-mentioned lifting footrest is not only applicable to the complex situation of this kind of seat (the outwardly protruding and telescopic chair leg 4), but also will not interfere with the telescoping of the chair leg 4. That is, as long as the locking component is unlocked from the chair leg 4, the movable part 42 can rotate to realize the telescoping of the chair leg 4, and at this time, the lifting footrest can also be lifted and lowered.

[0060] Specifically, the fixed part 41 is fixedly connected to the seat part of the seat. The fixed part 41 is a pipe fitting, and the movable part 42 is a pipe fitting sleeved outside the fixed part 41. The movable part 42 is located at the lower end of the fixed part 41 and contacts the ground. The fixed part 41 and the movable part 42 are connected by threads. Rotating the movable part 42 can realize the telescoping of the movable part 42 and the fixed part 41, and realize the lifting and lowering of the chair leg 4 and the seat part, so as to adapt to the body shapes of children at different ages. Moreover, in the adjusted state, rotating the movable part 42 and the lifting pedal 1 will not conflict and interfere. Further, the movable part 42 is frustum-shaped, and the diameter of the movable part 42 gradually increases from top to bottom. Such a chair leg 4 is more beautiful, and it is convenient to hold and rotate the movable part 42. Although the diameter of the movable part 42 changes, the locking mechanism 3 of the lifting footrest can adapt to the diameter change of the movable part 42, so that when the locking mechanism 3 locks with the movable part 42, it is more firm and the supporting capacity of the pedal 1 is stronger.

[0061] The locking mechanism 3 can be a cam wrench or other similar mechanisms, or it can be realized by setting a counterbore on the chair leg 4 and using a pin on the locking mechanism 3 that can enter and leave the counterbore to lock and unlock. In this embodiment, as Figures 8-10 shown, the locking mechanism 3 includes a sleeve 31, a movable piece 32 and a gasket 33 arranged in the sleeve 31. Both the movable piece 32 and the gasket 33 are arc-shaped sheets, which are respectively inserted into the sleeve 31. The movable piece 32 is far from the telescopic component 2, and the gasket 33 is close to the telescopic component 2. Both the movable piece 32 and the gasket 33 are provided with limit convex points (not shown), and corresponding limit grooves (not shown) are arranged on the inner wall of the sleeve 31. After the movable piece 32 and the gasket 33 are inserted into the sleeve 31, the limit convex points are located in the limit grooves to prevent the movable piece 32 and the gasket 33 from moving or rotating relative to the sleeve 31.

[0062] Further, as Figures 4-6As shown in the figure, the telescopic component 2 includes two telescopic tubes 21 and a sleeve. The two telescopic tubes 21 are partially inserted into the sleeve. An installation seat 5 extends towards the telescopic component 2 on the sleeve 31. The end of the telescopic component 2, that is, the end of the telescopic tube 21 away from the sleeve, is inserted into the installation seat 5 and fixedly connected to the installation seat 5 by screws. A knob 6 and a locking member 7 controlled to retract by the knob 6 are also provided on the sleeve 31. The knob 6 is arranged on the outer side of the sleeve 31 and away from the telescopic component 2. One end of the locking member 7 is fixedly connected to the knob 6, and the other end of the locking member 7 abuts against the movable piece 32. The knob 6 is configured to control the locking member 7 to move towards the movable piece 32, so that the movable piece 32 presses the chair leg 4, or to control the locking member 7 to move away from the movable piece 32 so that the movable piece 32 releases the chair leg 4. In the supporting state, the movable piece 32 presses the chair leg 4 so that the locking mechanism 3 stays in the current position. In the adjusting state, the movable piece 32 releases the chair leg 4 so that the locking mechanism 3 can move up and down on the chair leg 4. The locking member 7 is a screw, threadedly connected to the sleeve 31, and the knob 6 is turned to control the retraction of the locking member 7. The retraction of the locking member 7 can in turn control the movable piece 32 to press or release the chair leg 4, thereby realizing the function of the locking mechanism 3.

[0063] Furthermore, a gap-blocking portion 8 is also provided on the sleeve 31 and the movable piece 32. The gap-blocking portion 8 protrudes upward from the sleeve 31 and extends outward along the diameter direction of the sleeve 31. The gap-blocking portion 8 is used to block the gap generated between the movable piece 32 and the sleeve 31 after the movable piece 32 moves radially inward, improving the appearance and making it more plump. There can be two gap-blocking portions 8, respectively protruding above and below the sleeve 31. Both the movable piece 32 and the gasket 33 are elastic. On the one hand, this facilitates the installation of the movable piece 32 and the gasket 33 into the sleeve 31. On the other hand, it enables the movable piece 32 and the gasket 33 to fit the frustum-shaped chair leg 4, that is, to adapt to the changing diameter of the chair leg 4, increase the contact area, increase the friction force, and also make the gap between the movable piece 32 and the chair leg 4 smaller and more beautiful. Compared with the direct contact between the sleeve 31 and the chair leg 4, the contact between the movable piece 32, the gasket 33 and the chair leg 4 can be closer. Firstly, the gap is removed, and secondly, the friction force is increased, ensuring the stability when the locking mechanism 3 is locked with the chair leg 4 and improving the supporting capacity of the pedal 1.

[0064] Further, the sleeve is fixedly connected to the pedal 1. Two mounting plates 9 are fixedly provided on the sleeve and arranged at intervals. The mounting plates 9 are located below the pedal 1 and are fixedly connected to the pedal 1 by screws. A reinforcing rib 10 is also provided between the mounting plate 9 and the sleeve. The two locking mechanisms 3 are respectively fixedly connected to the two telescopic tubes 21. When the telescopic tube 21 is configured to lift and lower, the telescopic tube 21 slides within the sleeve to adapt to the change in the distance between the two chair legs 4. The telescopic component 2 realizes telescoping in such a way that the sleeve and the two telescopic tubes 21 telescope with each other. When the pedal 1 is lifted and lowered, the telescopic tube 21 and the sleeve will not only lift and lower together but also generate relative sliding. At the position where the distance between the chair legs 4 is smaller, the telescopic tube 21 enters the sleeve more. At the position where the distance between the chair legs 4 is larger, the telescopic tube 21 will protrude from the sleeve more, thereby realizing self - adaptation to the change in the distance between the chair legs 4.

[0065] The shapes of the sleeve and the telescopic tube 21 can be selected in various ways, such as oval tubes, triangular tubes, or special - shaped tubes, etc. When these shapes are selected, the sleeve and the telescopic tube 21 cannot rotate relative to each other. In this embodiment, as Figures 4-7 shown, both the sleeve and the telescopic tube 21 are circular tubes. Two limit sliding grooves 11 are provided on the sleeve. Each end of the two telescopic tubes 21 inserted into the sleeve is provided with a limit sliding member 12. The limit sliding member 12 is located in the limit sliding groove 11 and is configured to prevent the sleeve and the telescopic tube 21 from rotating. And when the telescopic component 2 telescopes, the limit sliding member 12 slides in the limit sliding groove 11. When both the sleeve and the telescopic tube 21 are circular tubes, the sleeve and the telescopic tube 21 can rotate relative to each other. Although it is beneficial to turn the pedal 1 between the two chair legs 4 during packaging to save packaging and transportation costs, the pedal 1 will rotate with the sleeve in the supporting state and cannot achieve stable support. Therefore, the limit sliding groove 11 and the limit sliding member 12 are respectively provided on the sleeve and the telescopic tube 21. After packaging and transportation, they limit the sleeve and the telescopic tube 21, so that the pedal 1 will no longer flip, thereby enabling the pedal 1 to stably support the human feet. In addition, the limit sliding member 12 is a screw that can be tightened, and tightening the screw can also lock the telescoping of the sleeve and the telescopic tube 21.

[0066] Embodiment 2: The difference between this embodiment and Embodiment 1 is only that the shapes of the sleeve and the telescopic tube 21 are different. Specifically:

[0067] As Figure 11 、 12 shown, both the sleeve and the telescopic tube 21 are square tubes. When both the sleeve and the telescopic tube 21 are square tubes, circumferential limitation between the sleeve and the telescopic tube 21 is realized by themselves, that is, the sleeve and the telescopic tube 21 cannot rotate relative to each other, so that the pedal 1 mounted on the sleeve will not rotate, and the supporting stability of the pedal 1 is stronger.

Claims

1. A lifting footrest suitable for tilting chair legs, characterized in that: include: A pedal is configured to support the feet of a human body, and the pedal is installed in the middle of the telescopic assembly; The telescopic component is arranged transversely in the left-right direction, and the telescopic component is configured to telescope as the distance between the two chair legs changes during lifting; At least two locking mechanisms are respectively mounted at two ends of the telescopic assembly, and the locking mechanisms are configured to selectively lock or unlock with the chair legs; It also has a supporting state and an adjusting state. In the supporting state, the locking mechanism is locked with the chair legs and the pedal is kept in the current position; in the adjusting state, the locking mechanism is unlocked with the chair legs, the pedal can be raised and lowered, and the telescopic assembly is synchronously and adaptively telescoped.

2. The lifting footrest suitable for tilting chair legs according to claim 1, characterized in that: The telescopic assembly includes a sleeve and telescopic tubes inserted at both ends of the sleeve, the sleeve is fixedly connected to the pedal, and the two locking mechanisms are respectively fixedly connected to the two telescopic tubes; when the telescopic tube is configured to be raised or lowered, the telescopic tube slides in the sleeve to adapt to the change in the distance between the two chair legs.

3. The lifting footrest suitable for tilting chair legs according to claim 2, characterized in that: Both the sleeve and the telescopic tube are square tubes.

4. The lifting footrest suitable for tilting chair legs according to claim 2, characterized in that: Both the sleeve and the telescopic tube are round tubes; the sleeve is provided with two limit sliding grooves, and the two telescopic tubes are each provided with a limit sliding member at the end inserted in the sleeve, the limit sliding member is located in the limit sliding groove, and is configured to prevent the sleeve and the telescopic tube from rotating.

5. The lifting footrest suitable for tilting chair legs according to claim 2, characterized in that: The sleeve and the telescopic tube are all elliptical tubes, triangular tubes or special-shaped tubes.

6. The lifting footrest suitable for tilting chair legs according to claim 1, characterized in that: The locking mechanism includes a sleeve and a movable piece arranged in the sleeve, a mounting seat extending from the sleeve toward the telescopic assembly, the end of the telescopic assembly is inserted into the mounting seat and fixedly connected to the mounting seat; the sleeve is also provided with a knob and a locking member whose retraction is controlled by the knob, the knob is arranged on the outside of the sleeve, one end of the locking member is fixedly connected to the knob, and the other end of the locking member abuts against the movable piece; the knob is configured to control the locking member to move toward the movable piece so that the movable piece squeezes the chair leg, or to control the locking member to move away from the movable piece so that the movable piece releases the chair leg; in the supporting state, the movable piece squeezes the chair leg so that the locking mechanism stays in the current position; in the adjusting state, the movable piece releases the chair leg so that the locking mechanism can be raised and lowered on the chair leg.

7. The lifting footrest suitable for tilting chair legs according to claim 6, characterized in that: The movable sheet is also provided with a gap-covering portion, which is exposed upward from the sleeve and extends outward along the diameter direction of the sleeve.

8. The lifting footrest suitable for tilting chair legs according to claim 6, characterized in that: The movable sheet is elastic.

9. The lifting footrest suitable for tilting chair legs according to claim 6, characterized in that: The movable piece is provided with a limiting convex point, and the inner wall of the sleeve is correspondingly provided with a limiting groove. The movable piece is installed in the sleeve and the limiting convex point is located in the limiting groove.

10. The lifting footrest suitable for tilting chair legs according to claim 6, characterized in that: The locking mechanism further comprises a gasket, which is arranged in the sleeve and located at the side close to the telescopic assembly.

11. The lifting footrest suitable for tilting chair legs according to claim 1, characterized in that: The locking mechanism is a cam wrench.

12. A seat, characterized in that: It comprises two front chair legs and a lifting foot pedal as described in any one of claims 1 to 11; two locking mechanisms are respectively mounted on the two chair legs, and the telescopic assembly and the pedal are located between the two chair legs; the chair legs are inclined from top to bottom and forward and outward; the chair legs comprise a fixed part and a movable part, the movable part is mounted on the lower end of the fixed part and the movable part is lifted and lowered on the fixed part; the locking mechanism is mounted on the movable part, and in the supporting state, the locking assembly is locked with the movable part, and in the adjusting state, the locking assembly is unlocked with the movable part and the locking assembly can be lifted and lowered relative to the fixed part.

13. The seat according to claim 12, characterized in that: The fixed part is threadedly connected to the movable part.

14. The seat according to claim 12, characterized in that: The movable part is in the shape of a truncated cone, and the diameter of the movable part gradually increases from top to bottom; the locking mechanism is also configured to adapt to different diameters of the chair legs at different positions.

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