Bottom device for moving and braking chair

Abstract

The utility model provides a bottom device for moving and braking a chair. The bottom device comprises a base with a plurality of supporting leg parts, rollers arranged below the base and used for moving the chair, and pedal parts arranged on the supporting leg parts, the pedal part comprises a pedal part, at least two mounting parts and a brake part protruding downwards from the mounting parts, the mounting parts are located below the foot placing part so as to be connected with different supporting foot parts, an elastic part is arranged between at least one mounting part and the corresponding supporting foot part, and the elastic part gives upward elastic force to the pedal part so that the whole pedal part can be emptied when the pedal part is unloaded. And after the feet are placed on the pedal piece, the pedal piece moves downwards on the supporting foot part in response to external force, so that the lower end of the brake piece is in contact with the ground for braking the chair, the brake function of a brake roller is replaced, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the field of furniture, in particular to a bottom device for moving and braking a chair. Background Art

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

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

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

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

[0006] In order to solve the above-mentioned technical problems, the present invention provides a bottom device for moving and braking a chair, comprising a base with a plurality of supporting legs, rollers arranged under the base and used for moving the chair, and a footrest arranged on the supporting legs; the footrest comprises a footrest, a mounting portion, and a brake portion protruding below the mounting portion, there are at least two mounting portions and they are located below the footrest portion to be connected to different supporting legs, and an elastic member is provided between at least one mounting portion and the supporting leg, the elastic member gives the footrest an upward elastic force to make the footrest as a whole fly in the air when it is unloaded, and after both feet are placed on the footrest, the footrest responds to the external force and moves downward on the supporting leg, so that the lower end of the brake portion touches the ground for braking the chair, thereby replacing the braking function of the brake roller and saving costs.

[0007] The technical solution of the present utility model is achieved as follows:

[0008] A bottom device for chair movement and braking, comprising:

[0009] A base, comprising a plurality of outwardly extending legs;

[0010] Rollers are disposed below the foot portion, the rollers being configured for movement of the chair;

[0011] The footrest comprises a footrest portion, a mounting portion and a brake portion protruding downward from the mounting portion. At least two mounting portions are provided below the footrest portion, and the mounting portions are provided on different support legs. An elastic member is provided between at least one mounting portion and the support leg. The elastic member is configured to give the footrest an upward elastic force and to make the brake portion vacant when the footrest is unloaded. The footrest is configured to move downward on the support leg in response to an external force, so that the lower end of the brake portion touches the ground for braking the chair.

[0012] The mounting portion is arranged on the support foot portion, and the mounting portion is located below the footrest portion, so that the footrest portion is located above the support foot portion, which is convenient for the user to step on; an elastic member is arranged between the mounting portion and the support foot, and under the action of the elastic member, the mounting portion is subjected to elastic force to lift the entire footrest portion, and the entire footrest portion is kept in the air when the user is unloaded. At this time, the roller can play a role in enabling the chair to move. After the two feet are placed on the footrest portion, the footrest portion moves downward against the elastic force of the elastic member due to the weight of the feet, and the roller is braked after the brake portion touches the ground, and the roller cannot roll on the ground, thereby keeping the seat stable; such a structure is simple and low in cost, greatly improving the efficiency of the manufacturer, especially since the brake roller is no longer used, and the operation of locking and unlocking the brake in this solution is more convenient, without having to stand up or bend over to operate, and the brake can be achieved by simply stepping on the footrest portion, and the unlocking can be achieved by leaving the footrest portion; moreover, the interference problem between the brake wheel and the base is solved, so that the steering of the roller is flexible, and the chair is also more flexible when moving.

[0013] Preferably, the mounting portion is formed with a downwardly open mounting groove, the foot portion being disposed within the mounting groove, the height length of the mounting groove being greater than the thickness of the foot portion; the mounting portion is raised and lowered on the foot portion via the mounting groove. Because the height length of the mounting groove is greater than the thickness of the foot portion, the mounting groove provides space for relative movement between the mounting portion and the foot portion, allowing the footrest to float on the foot portion; when the footrest moves downward on the foot portion, the foot portion correspondingly moves upward within the mounting groove.

[0014] Preferably, the elastic member is arranged in the mounting groove and abuts against the support leg and the mounting portion respectively. Such an arrangement of the elastic member is more convenient and facilitates assembly.

[0015] Preferably, the elastic member is a spring, which has a low cost and effectively reduces the production cost of the product.

[0016] Preferably, the brake portion is integrally formed with the mounting portion, with the brake portion located at the lower end of the mounting portion and extending downward. The brake portion extends downward from the lower end of the mounting portion, thereby protruding downward from the mounting portion. The footrest portion is located above the mounting portion, placing the brake portion closest to the ground within the footrest, facilitating effective contact with the ground during braking. Furthermore, such a brake portion requires less material, further reducing costs.

[0017] Preferably, the brake portion is integrally formed with the footrest, and is located on the lower end surface of the footrest and extends downwardly to protrude downwardly from the mounting portion. This allows for more options for positioning the brake portion on the footrest, effectively avoiding interference between the footrest and the roller.

[0018] Preferably, the footrest portion and the mounting portion are integrally formed, and the pedal piece is integrally injection-molded for ease of production and assembly.

[0019] 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 within a range of 360 degrees, that is, full-angle turning. The rolling direction of the roller is not restricted, so that the chair can be moved in any direction when on the ground, which is more flexible.

[0020] Preferably, the footrest is curved, and the mounting portions are spaced below the footrest. The footrests are generally radially arranged on the base. The curved footrests help keep the footrests positioned forward, making it easier to rest your feet, while also adapting to the distribution of the footrests. If the footrest is straight, the mounting portions at both ends of the footrest connect to the footrests, leaving the middle portion of the footrest relatively far back, making it inconvenient to rest your feet.

[0021] Preferably, the brake portion 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 away the floor and the pedal member itself from wearing away on the other hand.

[0022] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0023] The mounting portion is arranged on the support foot portion, and the mounting portion is located below the footrest portion, so that the footrest portion is located above the support foot portion, which is convenient for the user to step on; an elastic member is arranged between the mounting portion and the support foot, and under the action of the elastic member, the mounting portion is subjected to elastic force to lift the entire footrest portion, and the entire footrest portion is kept in the air when the user is unloaded. At this time, the roller can play a role in enabling the chair to move. After the two feet are placed on the footrest portion, the footrest portion moves downward against the elastic force of the elastic member due to the weight of the feet, and the roller is braked after the brake portion touches the ground, and the roller cannot roll on the ground, thereby keeping the seat stable; such a structure is simple and low in cost, greatly improving the efficiency of the manufacturer, especially since the brake roller is no longer used, and the operation of locking and unlocking the brake in this solution is more convenient, without having to stand up or bend over to operate, and the brake can be achieved by simply stepping on the footrest portion, and the unlocking can be achieved by leaving the footrest portion; moreover, the interference problem between the brake wheel and the base is solved, so that the steering of the roller is flexible, and the chair is also more flexible when moving. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a top view of the bottom device in an embodiment of the present invention;

[0025] Figure 2 This is a side view of the bottom device in the embodiment of the present invention when the brake portion does not touch the ground;

[0026] Figure 3 This is a side view of the bottom device when the brake part touches the ground and brakes in an embodiment of the present invention.

[0027] The reference numerals of the figures are: base 1; support leg 101; roller 2; footrest 3; footrest 31; mounting portion 32; brake portion 33; elastic member 4; mounting groove 5; friction pad 6. DETAILED DESCRIPTION

[0028] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0030] 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.

[0031] The specific implementation of the utility model is as follows:

[0032] like Figure 1-3 As shown, the utility model provides a bottom device for chair movement and braking, comprising:

[0033] The base 1 includes a plurality of outwardly extending legs 101;

[0034] The roller 2 is provided below the foot portion 101 and is configured to move the chair;

[0035] The footrest 3 includes a footrest portion 31, a mounting portion 32 and a brake portion 33 protruding downward from the mounting portion 32. At least two mounting portions 32 are provided below the footrest 31. The mounting portions 32 are provided on different support legs 101. An elastic member 4 is provided between at least one mounting portion 32 and the support leg 101. The elastic member 4 is configured to give the footrest 3 an upward elastic force and to make the brake portion 33 vacant when the footrest 3 is unloaded. The footrest 3 is configured so that the footrest 3 moves downward on the support leg 101 in response to an external force, so that the lower end of the brake portion 33 touches the ground for braking the chair.

[0036] The mounting portion 32 is provided on the support leg portion 101 and is located below the footrest portion 31. Therefore, the mounting portion 32 lifts the footrest 3 above the support leg portion 101 for the convenience of the user to step on it. An elastic member 4 is provided between the mounting portion 32 and the support leg portion 101. Under the action of the elastic member 4, the mounting portion 32 is subjected to elastic force to lift the entire footrest 3. When the chair is unloaded, the footrest 3 is kept in the air as a whole. At this time, the roller 2 can play a role in enabling the chair to move. After the feet are placed on the footrest 3, the weight of the feet causes the footrest 3 to resist the elastic force of the elastic member 4. The force is applied and the pedal 33 moves downward, and the roller 2 is braked after the brake part 33 touches the ground. The roller 2 cannot roll on the ground, and the stability of the chair seat is maintained. Such a structure is simple and low in cost, which greatly improves the efficiency of the manufacturer. In particular, the brake roller 2 is no longer used. The operation of locking and unlocking the brake in this solution is more convenient. There is no need to stand up or bend over to operate. The brake can be achieved by simply stepping on the foot pedal 3 and the unlocking can be achieved 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 roller 2 can be steered flexibly and the chair can be moved more flexibly.

[0037] Specifically, the brake portion 33 protruding downward from the mounting portion 32 is connected to the mounting portion 32 or the footrest, as long as the ground clearance of the lower end of the brake portion 33 is smaller than the ground clearance of the lower end of the mounting portion 32; in this way, when the pedal member 3 is stepped on, the brake portion 33 can touch the ground and brake, so the brake portion 33 can be set on the mounting portion 32 and formed integrally with the mounting portion 32, or it can be set on the footrest portion 31 and formed integrally with the footrest 31. In the vertical direction, the length required for the solution of setting the brake member on the mounting portion 32 will be shorter than that of the solution set on the footrest 31, so the cost is lower; more specifically, when the brake portion 33 is integrally formed with the mounting portion 32, The brake portion 33 is located at the lower end of the mounting portion 32 and extends downward, so it can protrude downward from the mounting portion 32. The footrest portion is above the mounting portion 32, so that the brake portion 33 is closest to the ground in the footrest member 3, which facilitates the brake portion 33 to effectively touch the ground when braking. Moreover, such a brake portion 33 requires less material, further reducing costs. When the brake portion 33 is integrally formed with the footrest 31, the brake portion 33 is located at the lower end surface of the footrest 31 and extends downward to protrude downward from the mounting portion 32. The brake portion 33 is positioned on the footrest 31 in a wider range of positions, which can effectively avoid the support leg 101 and the roller 2, preventing interference between the brake portion 33 and the roller 2. In this embodiment, the brake portion 33 is disposed on the mounting portion 32 and is integrally formed with the mounting portion 32.

[0038] In actual production, the footrest portion 31 and the mounting portion 32 are also integrally formed, that is, the pedal member 3 is integrally injection-molded, which is convenient for production and assembly.

[0039] Furthermore, in this embodiment, the base 1 has a total of five supporting legs 101, namely five-star feet, and three mounting portions 32 are provided below the footrest portion 31, and the three mounting portions 32 are respectively provided on the three supporting legs 101; each mounting portion 32 is formed with a downwardly open mounting groove 5, and the supporting leg 101 is provided in the mounting groove 5. In order to facilitate the placement of the supporting leg 101 in the mounting groove 5, the mounting groove 5 is through-connected along the length direction of the supporting leg 101. At the same time, in order to allow the mounting portion 32 and the brake portion 33 to avoid the roller 2, the mounting portion 32 is located at the rear of the front end of the supporting leg 101. The mounting groove 5 is longer in height than the thickness of the supporting foot 101. The mounting portion 32 is lifted and lowered on the supporting foot 101 through the mounting groove 5. Since the mounting groove 5 is longer in height than the thickness of the supporting foot 101, the mounting groove 5 provides space for the relative movement of the mounting portion 32 and the supporting foot 101, so that the footrest 3 is floatingly arranged on the supporting foot 101. When the footrest 3 moves downward on the supporting foot 101, the position of the supporting foot 101 in the mounting groove 5 moves upward accordingly.

[0040] At the same time, in order to facilitate production and assembly, the elastic member 4 is a spring and is arranged in the mounting groove 5 and is respectively in contact with the support foot 101 and the mounting portion 32; the spring cost is relatively low, which can effectively reduce the production cost of the product; therefore, when the pedal member 3 is stepped on, the spring will be compressed, so that the brake portion 33 can move down and touch the ground to achieve braking.

[0041] In addition, since the base 1 is a five-star foot, the support foot 101 is generally radial on the base 1. Therefore, in order to match its shape and make the position of the mounting portion 32 more appropriate, the footrest 31 is arc-shaped, and the mounting portions 32 are arranged at intervals below the footrest 31, so that the positions of the mounting portions 32 in the length direction of the support foot 101 are basically the same; and the arc-shaped footrest 31 is conducive to keeping the footrest position in a relatively forward position, which is convenient for resting the feet and at the same time adapts to the distribution of the support foot 101; if the footrest 31 is a straight board, after the mounting portions 32 are provided at both ends of the footrest 31 and connected to the support foot 101, the middle part of the footrest 31 will be in a relatively backward position, which is not convenient for resting the feet.

[0042] 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 rotation 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 restricted, so that the chair can move in any direction when on the ground, which is more flexible.

[0043] The lower end of the brake portion 33 is provided with a friction pad 6; when the pedal member 3 moves down to brake, the friction pad 6 contacts the ground, on the one hand increasing the friction force, on the other hand preventing the pedal member 3 from wearing the floor and the pedal member 3 itself.

Claims

1. A bottom device for chair movement and braking, characterized in that: include: A base, comprising a plurality of outwardly extending legs; Rollers are disposed below the foot portion, the rollers being configured for movement of the chair; The footrest comprises a footrest portion, a mounting portion and a brake portion protruding downward from the mounting portion. At least two mounting portions are provided below the footrest portion, and the mounting portions are provided on different support legs. An elastic member is provided between at least one mounting portion and the support leg. The elastic member is configured to give the footrest an upward elastic force and to make the brake portion vacant when the footrest is unloaded. The footrest is configured to move downward on the support leg in response to an external force, so that the lower end of the brake portion touches the ground for braking the chair.

2. The bottom device for chair movement and braking according to claim 1, characterized in that: A downwardly open mounting groove is formed on the mounting portion, the support leg portion is arranged in the mounting groove, the length of the mounting groove in the height direction is greater than the thickness of the support leg portion; the mounting portion is lifted and lowered on the support leg portion through the mounting groove.

3. The bottom device for chair movement and braking according to claim 2, characterized in that: The elastic member is arranged in the installation groove and abuts against the supporting foot portion and the installation portion respectively.

4. The bottom device for chair movement and braking according to claim 1, characterized in that: The elastic member is a spring.

5. The bottom device for chair movement and braking according to claim 1, characterized in that: The brake part and the mounting part are integrally formed, and the brake part is located at the lower end of the mounting part and extends downward.

6. The bottom device for chair movement and braking according to claim 1, characterized in that: The brake part is formed integrally with the footrest part. The brake part is located on the lower end surface of the footrest part and extends downward to protrude downward from the mounting part.

7. The bottom device for chair movement and braking according to claim 1, characterized in that: The footrest portion and the mounting portion are integrally formed.

8. The bottom device for chair movement and braking according to claim 1, characterized in that: The roller is a universal wheel.

9. The bottom device for chair movement and braking according to claim 1, characterized in that: The footrest portion is arc-shaped, and the mounting portions are arranged below the footrest portion at intervals.

10. The bottom device for chair movement and braking according to claim 1, characterized in that: A friction pad is provided at the lower end of the brake part.

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