Movable chair leg of child chair

Abstract

The invention provides a movable chair leg of a child chair, which comprises a base, rollers capable of enabling a bottom support part to move on the ground and a pedal part with a footrest function, and the rollers and the pedal part are arranged on the base. The pedal piece is arranged on the base in an up-down movable mode by arranging an elastic piece between the mounting part of the pedal piece and the base, and the elastic piece gives upward elastic force to the pedal piece all the time; the bottom supporting piece further has an initial state and a locking state, in the initial state, the elastic piece acts on the pedal piece to enable the pedal piece to be suspended above the ground, and the rolling wheels can roll on the ground to enable the bottom supporting piece to move; in the locking state, the foot rest part bears downward force due to the fact that the foot of the human body is placed on the foot rest part, and the elastic part deforms to enable the pedal part to move downwards to make contact with the bottom face so as to lock movement of the bottom supporting part; the pedal piece not only has a footrest function, but also has a brake anti-slip function, a brake wheel does not need to be selected as the idler wheel, and only a common universal wheel is needed.

Description

Technical Field

[0001] The invention relates to the field of furniture, in particular to a movable chair foot of a children's chair. Background Art

[0002] With the continuous improvement of living standards, people pay more and more attention to the impact of furniture on children. High-quality children's furniture that meets the psychological expectations of parents can often gain more market share. Therefore, based on user feedback, product updates and iterations are very necessary. In order to be 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 when the child sits in the children's chair or sits on and stands up, the rollers on the children's chair can be locked 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, the switches of the two brake wheels need to be stepped on. When unlocking, the switches of the two brake wheels need to be lifted up. The operation is inconvenient. What's more troublesome is that you even need to squat and use your hands to pry the switch to unlock.

[0003] Moreover, the cost of the brake wheel 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 wheel is replaced during after-sales service, the cost is further increased.

[0004] In addition, since the legs of the child chair are horizontal and the brake wheel is arranged 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 child chair cannot be moved. Therefore, a positioning pin is required to be provided 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 and it cannot achieve 360° steering. Therefore, the brake wheel makes the child chair only move in a straight line and it is difficult to rotate the child chair. The movement of the child chair becomes very rigid.

[0005] It can be seen from this that using brake wheels on a child chair is not a preferred solution. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the present invention provides a movable leg of a children's chair, comprising a base, a roller capable of moving a bottom support member on the ground, and a footrest member with a footrest function, wherein the roller and the footrest member are both arranged on the base, and the footrest member is movably arranged on the base up and down by arranging an elastic member between its mounting portion and the base, and the elastic member always gives the footrest member an upward elastic force; the bottom support member also has an initial state and a locked state, in the initial state, the elastic member acts on the footrest member, so that the footrest member is suspended from the ground, and the roller can roll on the ground to move the bottom support member; in the locked state, the footrest portion is subjected to a downward force due to the resting of a human foot, and the elastic member is deformed to cause the footrest member to move downward until it contacts the ground, so as to lock the movement of the bottom support member.

[0007] The technical solution of the present invention is achieved in this way: A movable chair leg for a children's chair, comprising: Base; Rollers are disposed on the base, the rollers being configured to enable the bottom support to move on the ground; The pedal member is configured to have a footrest function; the pedal member is movably arranged on the base, the pedal member includes a footrest portion for resting the foot and a mounting portion for connecting with the base, the footrest portion and the mounting portion are connected together, an elastic member is arranged between the mounting portion and the base, and the elastic member is configured to act on the pedal member and always give the pedal member an upward elastic force; The bottom support member also has an initial state and a locked state. In the initial state, the elastic member acts on the pedal member, so that the pedal member is lifted off the ground, and the roller can roll on the ground to move the bottom support member. In the locked state, the footrest is subjected to a downward force due to the human foot resting on it, and the elastic member is deformed to cause the pedal member to move downward until it contacts the ground, thereby locking the movement of the bottom support member.

[0008] When switching from the initial state to the locked state, the user's foot rests on the footrest, the footrest is subjected to a downward force, and the elastic member is deformed; when switching from the locked state to the initial state, the footrest is released, the elastic member drives the pedal member to reset, and the pedal member is vacated again. The pedal member not only has the function of a footrest, but also has the function of braking and anti-skidding. In this way, the pedal member is used to replace the braking and anti-skidding function of the brake wheel, and the roller no longer needs to use a brake wheel, and only an ordinary universal wheel is needed. The advantages brought are: first, the cost is greatly reduced, and the manufacturer's benefits are improved; second, the operation of brake locking and unlocking is more convenient, and there is no need to stand up or bend over to operate. The brake can be achieved by stepping on the pedal member, and the foot can be unlocked by leaving the pedal member; in addition, the interference problem between the brake wheel and the base is solved, so that the steering of the roller is flexible and the child chair is more flexible when moving.

[0009] Preferably, the mounting part is located below the base, a screw is provided below the base, the screw passes through the mounting part from bottom to top and is connected to the base, a gap is provided between the lower end surface of the mounting part and the head of the screw, an elastic member is provided between the head of the screw and the mounting part, and two ends of the elastic member abut against the head of the screw and the mounting part respectively. The gap between the lower end surface of the mounting part and the head of the screw allows the mounting part to move up and down with space, the elastic member has a compressed pre-deformation and always gives the mounting part an upward elastic force, when the footrest is not subjected to force, the footrest can remain in the air without contacting the ground, the roller can roll, and the bottom support member can move; the screw is a step screw.

[0010] Preferably, the mounting portion is provided with a receiving groove, which is open downward; an avoidance hole is provided on the end surface of the receiving groove, and the screw passes through the avoidance hole to be connected with the base; the elastic member is sleeved on the screw and is located in the receiving groove. The diameter of the avoidance hole is smaller than that of the receiving groove, the screw can pass through the avoidance hole and the elastic member can abut against the end surface of the receiving groove around the avoidance hole.

[0011] Preferably, the elastic member is a spring. The cost of the spring is low, and the cost of an ordinary universal wheel and a spring is still much lower than that of a brake wheel.

[0012] Preferably, an auxiliary elastic member is provided between the mounting portion and the base, and the auxiliary elastic member is a spring sheet, one end of which is arranged on the screw, and the other end of which abuts against the mounting portion, so as to further provide elastic force and play a protective role, so as to prevent the elastic member from being insufficiently elastic, resulting in the inability to keep the pedal member vacant.

[0013] Preferably, a baffle is sleeved on the screw, the baffle is located in the gap, the lower end of the elastic member abuts against the baffle; the spring sheet is arranged between the baffle and the head of the screw. For the elastic member, the baffle can make the abutment of the elastic member more stable and prevent the elastic member from slipping when abutting; for the spring sheet, the baffle limits one end of the spring sheet, so that the spring sheet can deform smoothly and generate elastic force.

[0014] Preferably, the spring sheet is in a downwardly curved arch shape, which is conducive to the spring sheet imparting elastic force to the brake pad.

[0015] Preferably, the elastic member is a spring sheet, one end of which is fixed on the screw, and the other end of which abuts against the mounting portion.

[0016] Preferably, the elastic member is a spring, the mounting portion is located below the base, the elastic member is arranged above the mounting portion, and the two ends of the elastic member are respectively connected to the base and the mounting portion. The spring has a stretched pre-deformation to always provide an upward elastic force for the pedal member, so that the pedal member is vacated without being subjected to force.

[0017] Preferably, the elastic member is a spring sheet, one end of which is fixed on the base, and the other end of which is abutted against or inserted on the mounting portion. The spring sheet has a downward pre-deformation, and one end of which is fixed on the base and the other end acts on the mounting portion to always provide an upward elastic force for the pedal member, thereby making the pedal member vacant without being subjected to force.

[0018] Preferably, the roller is a universal roller. In addition to rolling, the roller can also rotate on the base to switch the rolling direction, that is, the roller can turn, and the roller can rotate on the base in a range of 360°, that is, full-angle turning, and the rolling direction of the roller is not limited, so that the chair can move in any direction when it is on the ground, which is more flexible.

[0019] Preferably, the pedal member lower end is provided with a friction pad. When the pedal member moves down to brake, the friction pad contacts the ground, which increases friction on the one hand and prevents the pedal member from wearing the floor and the pedal member itself from wearing on the other hand.

[0020] Preferably, the base includes a main body and at least two supporting legs extending outward from the main body, and the roller is installed below the supporting legs. The supporting legs can increase the floor space of the base and increase the stability of the base.

[0021] Preferably, there are two supporting feet, and the two supporting feet are symmetrically arranged at the front end of the main body; the two supporting feet extend forward on the main body and extend toward the outside of the main body in the left and right directions. Similarly, the stability of the base is increased through this solution.

[0022] Preferably, there are two mounting parts, which are respectively located at the left and right ends of the footrest, and are respectively located under the two supporting feet, and at least two elastic members are arranged at intervals between each mounting part and the supporting foot. A large number of mounting parts and elastic members can increase the stability of the footrest when it is in the air.

[0023] The design starting point, concept and beneficial effects of the present invention using the above technical solution are: When switching from the initial state to the locked state, the user's foot rests on the footrest, the footrest is subjected to a downward force, and the elastic member is deformed; when switching from the locked state to the initial state, the footrest is released, the elastic member drives the pedal member to reset, and the pedal member is vacated again. The pedal member not only has the function of a footrest, but also has the function of braking and anti-skidding. In this way, the pedal member is used to replace the braking and anti-skidding function of the brake wheel, and the roller no longer needs to use a brake wheel, and only an ordinary universal wheel is needed. The advantages brought are: first, the cost is greatly reduced, and the manufacturer's benefits are improved; second, the operation of brake locking and unlocking is more convenient, and there is no need to stand up or bend over to operate. The brake can be achieved by stepping on the pedal member, and the foot can be unlocked by leaving the pedal member; in addition, the interference problem between the brake wheel and the base is solved, so that the steering of the roller is flexible and the child chair is more flexible when moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the children's chair in Example 1 of the present invention; Figure 2 It is a front view of the child chair in the initial state in Example 1 of the present invention; Figure 3 A front view of the child chair in the locked state in Example 1 of the present invention; Figure 4 is a side view of the child chair in the initial state in Example 1 of the present invention; Figure 5 A side view of the child chair in a locked state in Example 1 of the present invention; Figure 6 It is a three-dimensional schematic diagram of the bottom support member in Example 1 of the present invention; Figure 7 It is a bottom view of the bottom support member in Example 1 of the present invention; Figure 8 is a cross-sectional view of the bottom support member in Example 1 of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the spring piece in Example 1 of the present invention; Fig.10 A bottom view of the spring sheet as an elastic member arranged on the mounting portion in Example 2 of the present invention; Fig.11 A bottom view of the spring sheet connected to the base and abutting against the mounting portion in Example 3 of the present invention; Fig.12 It is a schematic diagram of the three-dimensional structure of the bottom support member in Example 4 of the present invention; Fig.13 is a cross-sectional view of a bottom support member in Example 4 of the present invention; Fig.14 It is a schematic diagram of the three-dimensional structure below the guide part in Example 4 of the present invention; Fig.15 It is a schematic diagram of the three-dimensional structure inside the guide part in Example 4 of the present invention; Fig.16 It is a schematic diagram of the three-dimensional structure of the floating plate, the mounting plate and the spring installation in Example 4 of the present invention; Fig.17 A bottom view of the rotating seat and the mounting portion being rotatably connected in Example 5 of the present invention; Fig.18 It is a schematic diagram of the spring being arranged behind the rotating shaft in Example 5 of the present invention; Fig.19 This is a schematic diagram of a spring disposed in front of a rotating shaft in Example 5 of the present invention; Fig. 20 It is a schematic diagram of a torsion spring disposed on a rotating shaft in Example 6 of the present invention; Fig.21 This is a bottom view of the base and the mounting portion being rotatably connected via a rotating shaft in Example 7 of the present invention.

[0025] The reference numerals of the figures are as follows: base 1; main body 101; foot portion 102; roller 2; pedal 3; footrest portion 31; support arm 310; base 311; mounting portion 32; support rod 4; seat portion 5; backrest 6; pull ring 7; friction pad 8; mounting column 9; screw 91; avoidance hole 10; accommodating groove 11; spring piece 12; abutment portion 121; baffle 13; footrest plate 14; sleeve 16; guide portion 18; mounting groove 19; guide column 20; floating plate 21; mounting plate 22; first screw 23; second screw 24; spring 25; rotating seat 26; rotating shaft 27; torsion spring 28. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purpose, 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 in the embodiments can be combined with each other without conflict.

[0027] 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 protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0028] 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.

[0029] The specific implementation methods of the present invention are as follows: Example

[0030] like Figure 1-6As shown, the present invention provides a movable chair leg for a children's chair, comprising: Base 1; A roller 2 is disposed on the base 1, and the roller 2 is configured to enable the bottom support member to move on the ground; The footrest 3 is configured to have a footrest function; the footrest 3 is movably arranged on the base 1 up and down, and the footrest 3 includes a footrest portion 31 for resting the foot and a mounting portion 32 for connecting with the base 1, the footrest portion 31 and the mounting portion 32 are connected together, and an elastic member is arranged between the mounting portion 32 and the base 1, and the elastic member is configured to act on the footrest 3 and always give the footrest 3 an upward elastic force; The bottom support member also has an initial state and a locked state. In the initial state, the elastic member acts on the pedal member 3, so that the pedal member 3 is lifted off the ground, and the roller 2 can roll on the ground to move the bottom support member; in the locked state, the footrest 31 is subjected to a downward force due to the human foot resting on it, and the elastic member is deformed to make the pedal member 3 move downward until it contacts the ground, so as to lock the movement of the bottom support member.

[0031] When switching from the initial state to the locked state, the user's foot rests on the footrest 31, and the footrest 31 is subjected to a downward force, and the elastic member is deformed; when switching from the locked state to the initial state, the footrest 31 is released, and the elastic member drives the pedal member 3 to reset, and the pedal member 3 is vacated again. The pedal member 3 not only has a footrest function, but also has a braking and anti-skid function. In this way, the pedal member 3 is used to replace the braking and anti-skid function of the brake wheel, and the roller 2 no longer needs to use a brake wheel, and only an ordinary universal wheel is needed. The advantages brought are: first, the cost is greatly reduced, and the benefits of the manufacturer are improved; specifically, on the market, the cost of a brake wheel is 4-5 yuan, and the better one is 6-8 yuan, while the ordinary universal wheel only needs more than 1 yuan, and even if the cost of the elastic member and the pedal member 3 is added, it will not exceed 3 yuan, which greatly reduces the production cost in the case of mass production.

[0032] Secondly, the operation of locking and unlocking the brake is more convenient. There is no need to stand up or bend over to operate. The brake can be braked by stepping on the foot pedal 3, and the brake can be unlocked by taking the foot off the foot pedal 3. In addition, 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 child chair is more flexible when moving.

[0033] Specifically, if Figure 1-5As shown, the bottom support member is used in a child chair, and the child chair also includes a support rod 4 inserted on the base 1 and a seat 5 and a backrest 6 arranged on the support rod 4. The support rod 4 is used to support the seat 5 and the backrest 6, and the base 1 serves as the main support of the child chair, the seat 5 is used to support the buttocks of a human body, and the backrest 6 is used to support the back of a human body; a pull ring 7 is also provided at the upper end of the support rod 4, and holding the pull ring 7 facilitates pushing and pulling the child chair. When pushing and pulling the child chair, the footrest 3 is vacated, the roller 2 can rotate smoothly, and the child chair can move in any direction, which is very flexible; when the user sits on the seat 5 and puts his feet on the footrest 3, the footrest 3 is naturally stepped on and contacts the ground, thereby achieving braking. Anti-slip, the roller 2 cannot roll, and the movement of the children's chair is locked, which improves the safety when sitting; further, the roller 2 is a universal roller 2; in addition to rolling, the roller 2 can also rotate on the base 1 to switch the rolling direction, that is, the roller 2 can turn, and the rotatable range of the roller 2 on the base 1 is 360°, that is, full-angle turning, the rolling direction of the roller 2 is not limited, so that the chair can move in any direction when it is on the ground, which is more flexible; a friction pad 8 is provided at the lower end of the footrest 3. When the footrest 3 moves down to brake, the friction pad 8 contacts the ground, which increases the friction on the one hand and prevents the footrest 3 from wearing the floor and the footrest 3 itself on the other hand. The friction pad 8 can be made of rubber.

[0034] Furthermore, the base 1 includes a main body 101 and at least two supporting legs 102 extending outward from the main body 101, and the roller 2 is installed below the supporting legs 102; in this embodiment, Figure 7 As shown, there are two supporting feet 102 and the two supporting feet 102 are symmetrically arranged at the front end of the main body 101; the two supporting feet 102 extend forward on the main body 101, and at the same time extend toward the outside of the main body 101 in the left and right directions; the supporting feet 102 can increase the floor space of the base 1, increase the stability of the base 1, and thus increase the stability of the user when sitting.

[0035] In this embodiment, the elastic member is a spring 25, the pedal member 3 is U-shaped and the footrest portion 31 is U-shaped, the footrest portion 31 includes two arms 310 that are divergent and extend toward the middle of the support foot portion 102, and there are two mounting portions 32, the two mounting portions 32 are respectively located at the left and right ends of the footrest portion 31, that is, at the ends of the arms 310, and the two mounting portions 32 are respectively located under the two support foot portions 102, and at least two springs 25 arranged at intervals are provided between each mounting portion 32 and the support foot portion 102; the number of mounting portions 32 and springs 25 is large, which can increase the stability of the pedal member 3 when it is in the air; when the user steps on the footrest portion 31, the mounting portion 32 floats due to the spring 25, and the front end of the pedal member 3 will tilt downward and contact the ground.

[0036] The shapes of the base 1 and the footrest 3 are not the key factors to be considered in this solution. Even if the base 1 and the footrest 3 have other shapes, the braking and anti-slip of the child chair can still be achieved through this solution; and the footrest 3 can not only tilt at the front end, but also move up and down to contact the ground.

[0037] More specifically, Figure 7 , 8 As shown, the mounting portion 32 is not directly connected to the support leg portion 102, and each support leg portion 102 is provided with two downwardly facing mounting posts 9, which can be used to install screws 91, and an avoidance hole 10 is provided on the mounting portion 32 located below the mounting post 9, and the screw 91 passes through the avoidance hole 10 of the mounting portion 32 from bottom to top and is installed on the mounting post 9 of the support leg portion 102, and the screw 91 is a stepped screw 91, so that there is a gap between the lower end surface of the mounting portion 32 and the head of the screw 91; further, a receiving groove 11 is provided on the mounting portion 32, and the receiving groove 11 is open downward, and the avoidance hole 10 is located on the end surface of the receiving groove 11, and the spring 25 is arranged between the head of the screw 91 and the mounting portion 32, that is, the spring 25 is sleeved on the screw 91 and is located in the receiving groove 1 1, the two ends of the spring 25 are respectively abutted against the head of the screw 91 and the end face of the receiving groove 11; the above scheme realizes low-cost braking, the gap between the lower end face of the mounting portion 32 and the head of the screw 91 allows the mounting portion 32 to have space for moving up and down, the spring 25 has a compressed pre-deformation and always gives the mounting portion 32 an upward elastic force, when the footrest portion 31 is not subjected to force, the pedal member 3 can remain in the air without contacting the ground, the roller 2 can roll, and the bottom support member can move; the diameter of the avoidance hole 10 is smaller than the receiving groove 11, the screw 91 can pass through the avoidance hole 10 and the elastic member can abut against the end face of the receiving groove 11 around the avoidance hole 10; the cost of the spring 25 is low, and the sum of the cost of the ordinary universal wheel and the spring 25 is still much lower than that of the brake wheel.

[0038] Furthermore, if Figure 6-9As shown, an auxiliary elastic member is further provided between the mounting portion 32 and the base 1, and the auxiliary elastic member is a spring sheet 12, one end of which is arranged on the screw 91, and the other end of the spring sheet 12 abuts against the mounting portion 32, so as to further provide elastic force and play a protective role to prevent the elastic member from being insufficiently elastic, resulting in the inability to keep the pedal member 3 vacant; specifically, a baffle 13 is sleeved on the screw 91, and the diameter of the baffle 13 is larger than the head of the screw 91, and the baffle 13 is located in the gap, and the lower end of the spring 25 abuts against the baffle 13; the spring sheet 12 is arranged between the baffle 13 and the head of the screw 91; for the spring 25, a baffle 13 is arranged The blocking piece 13 can make the spring 25 abut against the ground more stably and prevent the spring 25 from slipping when abutting; for the spring piece 12, the blocking piece 13 limits one end of the spring piece 12, so that the spring piece 12 can be deformed smoothly and generate elastic force; the shape of the spring piece 12 is a downward-bent arch, which is conducive to the spring piece 12 giving elastic force to the brake pad; the spring piece 12 is bent at its end away from the screw 91 to form an abutment portion 121, and the abutment portion 121 abuts against the mounting portion 32, and the spring piece 12 has a downward pre-deformation, so that when the foot pedal 3 is not subjected to force, the spring piece 12 still gives the foot pedal 3 an upward elastic force.

[0039] The footrest portion 31 also includes a base 311 and a footrest 14, the support arm 310 is a part of the base 311, the base 311 is connected to the mounting portion 32, and the footrest 14 is connected to the base 311 by at least one lifting column (not shown) inserted on the base 311; in the present embodiment, two lifting columns are provided at the lower end of the footrest 14, and two sleeves 16 are correspondingly provided on the base 311, and the two lifting columns are respectively inserted in the two sleeves 16; a plurality of vertically arranged gear holes (not shown) are provided on the lifting columns, and a sliding locking pin is inserted on the sleeve 16, and when the footrest 14 is pulled up and down, after the lifting column slides in the sleeve 16, the locking pin can enter into different gear holes to lock the height of the footrest 14, thereby realizing the lifting and lowering of the footrest 14; the sleeve 16 is closed and the lower part of the sleeve 16 protrudes downward from the base 311, and the friction pad 8 is arranged on the lower end surface of the sleeve 16.

[0040] Embodiment 2: The difference between this embodiment and embodiment 1 is that the elastic member is a spring sheet 12 and there is no auxiliary elastic member.

[0041] Specifically, if Fig.10 As shown, the elastic member is a spring sheet 12, and a blocking piece 13 is fixed near the head of the screw 91. One end of the spring sheet 12 is slotted and fixed between the head of the screw 91 and the blocking piece 13. The other end of the spring sheet 12 abuts against the mounting portion 32 and provides an upward elastic force for the pedal member 3.

[0042] Embodiment 3: The difference between this embodiment and embodiment 2 is that the spring piece 12 is fixed on the base 1.

[0043] Specifically, if Fig.11 As shown, the elastic member is a spring sheet 12, one end of which is fixed on the base 1, and the other end of the spring sheet 12 is abutted or inserted on the mounting portion 32. In this embodiment, the spring sheet 12 abuts on the mounting portion 32; the spring sheet 12 has a downward pre-deformation, and one end is fixed on the base 1 and the other end acts on the mounting plate 32 to always provide an upward elastic force for the pedal member 3, thereby making the pedal member 3 vacant without being subjected to force; one end of the spring sheet 12 is fixed on the base 1, and a hole can be opened on the base 1 to allow the spring sheet 12 to be inserted in the base 1, or the spring sheet 12 can be injection-molded in the base 1 to achieve this. In this embodiment, the spring sheet 12 is directly fixed to the base 1 with screws.

[0044] Embodiment 4: The difference between this embodiment and Embodiment 1 is that the spring 25 is arranged above the mounting portion 32 .

[0045] Specifically, if Figure 12-16 As shown, the support leg 102 is provided with a downward guide portion 18, the guide portion 18 is provided with a mounting groove 19, a vertical guide column 20 is provided in the mounting groove 19, a floating plate 21 capable of moving up and down is sleeved on the guide column 20, a mounting plate 22 is provided at the notch of the mounting groove 19, the mounting plate 22 is fixedly connected to the guide column 20 by a first screw 23 from bottom to top, the guide portion 18 is locked with the floating plate 21 by two second screws 24 from bottom to top, the second screws 24 pass through the guide portion 18 It is installed on the floating plate 21 together with the mounting plate 22, and two springs 25 are provided between the mounting plate 22 and the floating plate 21, and the two springs 25 are respectively sleeved on the second screws 24; the springs 25 have a compressed pre-deformation to always provide an upward elastic force for the pedal member 3, so that the pedal member 3 is suspended in the air without being subjected to force; when the user steps on the pedal member 3, the pedal member 3 is driven downward by the gravity of the foot, and the floating plate 21 also moves in the mounting groove 19, and the springs 25 are further compressed.

[0046] Embodiment 5: The difference between this embodiment and embodiment 1 is that the mounting portion and the base are rotatably connected via a rotating shaft and corresponding elastic members are provided. Specifically: like Figure 17-19As shown, a rotating seat 26 is protruded below the two forward supporting legs 102, and the mounting portion 32 is located beside the rotating seat 26. A rotating shaft 27 is inserted into the mounting portion 32 and the rotating seat 26 on the same side, so that the pedal member 3 can be set on the base 1 with a slight rotation; further, in the up and down directions, there is a gap between the supporting legs 102 and the mounting portion 32, and a spring 25 is provided in the gap, and the spring 25 is configured to enable the bottom of the pedal member 3 to be vacated on the ground when no force is applied; specifically, when the spring 25 is arranged in front of the rotating shaft 27, the spring 25 has a pre-stretching deformation and always gives the mounting portion 32 an upward elastic force F; or, in other words, when the spring 25 is arranged behind the rotating shaft, the spring 25 has a pre-compression deformation and uses a downward elastic force F' to be given to the mounting portion 32; both schemes in this embodiment can act on the mounting portion 32 through the elastic force of the spring 25, so that the front end of the pedal member 3 can land and brake when the pedal member 3 is stepped on, and reset to the ground after releasing.

[0047] Embodiment 6: The difference between this embodiment and embodiment 5 is that a torsion spring 28 is provided on the rotating shaft 27. Fig. 20 As shown, the two torsion arms of the torsion spring 28 are respectively in contact with the rotating seat 26 and the mounting portion 32 , and the elastic force of the torsion spring 28 causes the front end of the pedal member 3 to have a tendency to tilt upward and fly into the air.

[0048] Embodiment 7: The difference between this embodiment and embodiment 6 is that the mounting portion 32 is located between the two forward supporting legs 102, and the mounting portion 32 and the supporting legs 102 on the same side are located beside each other, and the supporting legs 102 and the mounting portion 32 are rotatably connected by setting a rotating shaft 27, such as Fig.21 shown.

Claims

1. A movable foot of a children's chair, characterized in that: include: Base; Rollers are disposed on the base, the rollers being configured to enable the bottom support to move on the ground; A footrest member configured to have a footrest function; The pedal member is movably arranged on the base, and includes a footrest portion for resting the foot and a mounting portion for connecting with the base, the footrest portion and the mounting portion are connected together, and an elastic member is arranged between the mounting portion and the base, and the elastic member is configured to act on the pedal member and always give the pedal member an upward elastic force; The bottom support member also has an initial state and a locked state. In the initial state, the elastic member acts on the pedal member, so that the pedal member is lifted off the ground, and the roller can roll on the ground to move the bottom support member. In the locked state, the footrest is subjected to a downward force due to the human foot resting on it, and the elastic member is deformed to cause the pedal member to move downward until it contacts the ground, thereby locking the movement of the bottom support member.

2. The movable foot of the children's chair according to claim 1, characterized in that: The mounting part is located below the base, a screw is arranged below the base, the screw passes through the mounting part from bottom to top and is connected to the base, and a gap is provided between the lower end surface of the mounting part and the head of the screw.

3. The movable foot of the children's chair according to claim 2, characterized in that: The elastic member is arranged between the head of the screw and the mounting portion, and two ends of the elastic member are respectively abutted against the head of the screw and the mounting portion.

4. The movable foot of the children's chair according to claim 3, characterized in that: The mounting portion is provided with a receiving groove which is open downwards; an avoidance hole is provided on the end surface of the receiving groove, and a screw passes through the avoidance hole to be connected with the base; and the elastic piece is sleeved on the screw and is located in the receiving groove.

5. The movable foot of the children's chair according to claim 3, characterized in that: The elastic member is a spring.

6. The movable foot of the children's chair according to claim 3, characterized in that: An auxiliary elastic member is also provided between the mounting portion and the base. The auxiliary elastic member is a spring sheet. One end of the spring sheet is arranged on the screw, and the other end of the spring sheet abuts against the mounting portion.

7. The movable foot of the children's chair according to claim 6, characterized in that: A blocking piece is sleeved on the screw, the blocking piece is located in the gap, the lower end of the elastic member abuts against the blocking piece; the spring piece is arranged between the blocking piece and the head of the screw.

8. The movable foot of the children's chair according to claim 6, characterized in that: The shape of the spring piece is an arch that bends downward.

9. The movable foot of the children's chair according to claim 2, characterized in that: The elastic member is a spring sheet, one end of which is fixed on the screw, and the other end of which is abutted against the mounting portion.

10. The movable foot of the children's chair according to claim 1, characterized in that: The elastic member is a spring, the mounting portion is located below the base, the elastic member is arranged above the mounting portion, and two ends of the elastic member are respectively connected to the base and the mounting portion.

11. The movable foot of the children's chair according to claim 1, characterized in that: The elastic member is a spring sheet, one end of which is fixed on the base, and the other end of which is abutted against or inserted on the mounting portion.

12. The movable foot of the children's chair according to claim 1, characterized in that: The base comprises a main body and at least two supporting feet extending outward from the main body, and the roller is installed under the supporting feet.

13. The movable foot of the children's chair according to claim 12, characterized in that: There are two supporting feet, and the two supporting feet are symmetrically arranged at the front end of the main body; the two supporting feet extend forward on the main body, and at the same time extend toward the outside of the main body in the left and right directions.

14. The movable foot of the children's chair according to claim 13, characterized in that: There are two mounting parts, which are respectively located at the left and right ends of the footrest, and are respectively located under the two supporting feet. At least two elastic members arranged at intervals are arranged between each mounting part and the supporting foot.

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