Foot cover and chair
By installing retractable roller components and elastic elements on the chair legs, the problem of students' classroom chairs being difficult to move and lacking stability is solved, achieving stable fixation and effortless movement of the chair, thus improving reliability and self-study experience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN FUGUITONG TECH CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-19
AI Technical Summary
The existing student classroom chairs do not have wheels at the bottom, making them difficult to move and prone to wear and tear. The wheels with wheels are not stable enough, affecting their reliability and the self-study experience.
Design a foot cover with a retractable roller assembly. The rollers are extended and retracted by an elastic element, so that the chair is fixed in use and the rollers automatically extend when the chair is moved, reducing friction and noise.
It improves the stability and reliability of the chair, reduces the physical exertion of moving it, extends the chair's lifespan, and enhances the study and class experience.
Smart Images
Figure CN224251011U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chair technology, specifically to a foot cover and a chair. Background Technology
[0002] Current classroom chairs typically lack casters, requiring the chair to be lifted before moving. However, due to the chair's weight, the legs are often lifted only slightly to save effort, leading to friction and wear between the legs and the ground, affecting the chair's reliability and lifespan. Furthermore, moving the chair a considerable distance requires prolonged lifting, which is time-consuming and laborious. While some office chairs have casters, their stability is insufficient; even slight tilting or moving causes the chair to shift, making it difficult to maintain a stable position and generating noise that disrupts students' study or classroom experience. Utility Model Content
[0003] The present invention aims to provide a foot cover and a chair to solve the aforementioned technical problems.
[0004] To achieve the above objectives, the technical solution of this utility model is as follows: a foot cover, including a foot cover body, a receiving cavity is provided at the bottom of the foot cover body, and a roller assembly that can move up and down is installed in the receiving cavity. The roller assembly includes a roller unit with a roller and an elastic member installed between the roller unit and the foot cover body. The elastic member is used to push the foot cover body upward so that the roller of the roller unit contacts the ground alone.
[0005] Preferably, the roller unit includes two support sleeves, a rotating shaft is disposed through the center of the roller, and the two support sleeves are respectively fitted on both ends of the rotating shaft.
[0006] Preferably, the receiving cavity includes a main receiving cavity and auxiliary receiving cavities located on the left and right sides of the main receiving cavity. The roller is installed in the main receiving cavity, and the two support sleeves are detachably installed in the left and right auxiliary receiving cavities respectively.
[0007] Preferably, the elastic element is installed in the secondary receiving cavity, and the upper and lower ends of the elastic element abut against the inner top wall of the secondary receiving cavity and the top side of the support sleeve, respectively.
[0008] Preferably, a limiting hole is provided on the side of the secondary receiving cavity away from the main receiving cavity on the main body of the foot cover, and an elastic plate extending downward is provided on the side of the support sleeve away from the roller. A limiting buckle is provided on the outer side of the elastic plate, and the limiting buckle is movably disposed in the limiting hole.
[0009] Preferably, the elastic element is a spring; and / or the surface of the foot cover body is provided with protrusions for increasing friction.
[0010] This utility model also provides a chair, including any of the above-described foot covers and a chair body with chair legs. An insertion hole is provided on one side of the foot cover body, and the foot cover is fixedly fitted onto the end of the chair leg through the insertion hole.
[0011] Preferably, the sum of the elastic forces of all the elastic elements on the chair is greater than the sum of the weights of the chair body and all the footrest bodies.
[0012] Preferably, there are four foot covers and two chair legs. The two chair legs are arranged parallel to each other and extend in the front and back directions. The four foot covers are fixedly fitted onto the front and back ends of the two chair legs respectively.
[0013] Preferably, positioning holes are provided on one side of the front and rear ends of the chair legs, and elastic buckles are provided on the side of the main body of the foot cover corresponding to the insertion holes. The elastic buckles are locked and limited in place with the positioning holes.
[0014] This utility model has the following beneficial effects:
[0015] This utility model relates to a chair leg cover that is installed on the chair legs and is mainly used in student chairs. When a user sits on the chair, the weight of the user and the chair causes the chair body and the leg cover body to move downwards and compress the elastic element. This causes the rollers of the roller unit to retract into the receiving cavity of the leg cover body, and the bottom of the leg cover body contacts the ground, ensuring that the chair remains stationary. This prevents noise from affecting students' self-study or class experience and makes the chair safer, more stable, and reliable. When the chair needs to be moved, the user gets up from the chair, and the elastic force of the elastic element pushes the chair body and the leg cover body upwards. This causes the bottom side of the rollers of the roller unit to extend out of the receiving cavity and contact the ground individually. Then, the chair can be moved by pushing it. There is no need to lift the chair manually, making it easier, faster, and less strenuous. Furthermore, the chair legs will not rub against the ground during movement, thus preventing wear and tear and improving the reliability and lifespan of the chair. Attached Figure Description
[0016] Figure 1 This is a perspective view of the foot cover according to an embodiment of the present invention.
[0017] Figure 2 This is a bottom side view of the foot cover according to an embodiment of the present invention.
[0018] Figure 3 This is a top view of the foot cover according to an embodiment of the present invention.
[0019] Figure 4 yes Figure 3 Sectional view at point AA.
[0020] Figure 5This is an exploded view of the foot cover according to an embodiment of the present invention.
[0021] Figure 6 This is a schematic diagram of the roller unit of the foot cover according to an embodiment of the present invention.
[0022] Figure 7 This is a perspective view of a chair according to an embodiment of the present utility model.
[0023] Figure 8 This is a left view of a chair according to an embodiment of the present invention.
[0024] Figure 9 This is an exploded view of a chair according to an embodiment of the present invention.
[0025] Attached diagram labels: 10 Foot cover, 11 Foot cover body, 12 Roller unit, 121 Support sleeve, 1211 Elastic plate, 1212 Limiting buckle, 122 Roller, 123 Rotating shaft, 13 Main receiving cavity, 14 Secondary receiving cavity, 15 Elastic element, 16 Limiting hole, 17 Protrusion, 18 Insertion hole, 19 Elastic buckle, 20 Chair body, 21 Chair leg, 22 Positioning hole. Detailed Implementation
[0026] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0027] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] See Figure 1-6 As shown in the figure, as an embodiment of the present invention, a foot cover 1 is provided for installation on the chair leg 21 of a chair. It includes a foot cover body 11, and a receiving cavity is provided at the bottom of the foot cover body 11. A roller assembly that can extend and retract vertically is installed in the receiving cavity. The roller assembly includes a roller unit 12 with a roller 122 and an elastic member 15 installed between the roller unit 12 and the foot cover body 11. The elastic member 15 is specifically a spring. The elastic member 15 is used to push the foot cover body 11 upward so that the roller 122 of the roller unit 12 contacts the ground alone.
[0030] The foot cover 1 of this utility model is installed on the chair leg 21 and is mainly used in student chairs. When a user sits on the chair, under the weight of the human body and the chair, the chair body 20 and the foot cover body 11 move downward and compress the elastic element 15, causing the rollers 122 of the roller unit 12 to retract into the receiving cavity of the foot cover body 11. The bottom of the foot cover body 11 contacts the ground, ensuring that the chair is fixed in position, thereby preventing noise from affecting the student's self-study or class experience, and making it safer, more stable and reliable. When it is necessary to move the chair... When the user gets up from the chair, the elastic force of the elastic element 15 lifts the chair body 20 and the foot cover body 11 upwards. The bottom side of the roller 122 of the roller unit 12 extends out of the receiving cavity, so that the roller 122 of the roller unit 12 makes contact with the ground alone. Then, the chair can be moved by pushing it. There is no need to lift the chair manually, which is easier, saves time and effort. When the chair moves, the chair legs 21 will not rub against the ground and thus not wear out, which improves the reliability of the chair and extends its service life.
[0031] In addition to student chairs, the foot covers of this utility model can also be used on office chairs, tables, and other products, without limitation.
[0032] In this embodiment, the roller unit 12 includes two support sleeves 121. A rotating shaft 123 is disposed through the center of the roller 122. The two support sleeves 121 are respectively sleeved on both ends of the rotating shaft 123. The receiving cavity includes a main receiving cavity 13 and auxiliary receiving cavities 14 located on the left and right sides of the main receiving cavity 13. The roller 122 is installed in the main receiving cavity 13. The two support sleeves 121 are detachably installed in the left and right auxiliary receiving cavities 14 respectively. This arrangement can ensure the stability of the installation and use of the roller 122, and at the same time facilitate the installation, removal and maintenance of the roller unit 12.
[0033] In this embodiment, the elastic element 15 is installed in the secondary receiving cavity 14, and the upper and lower ends of the elastic element 15 abut against the inner top wall of the secondary receiving cavity 14 and the top side of the support sleeve 121, respectively. That is, the elastic element 15 is designed to extend and retract vertically and is located above the left and right sides of the roller unit 12, so that the roller unit 12 can be more balanced, stable and reliable when it extends and retracts vertically in the receiving cavity.
[0034] In this embodiment, a limiting hole 16 is provided on the side of the secondary receiving cavity 14 away from the main receiving cavity 13 on the foot cover body 11. An elastic plate 1211 extending downward is provided on the side of the support sleeve 121 away from the roller 122. A limiting buckle 1212 is provided on the outer side of the elastic plate 1211. The limiting buckle 1212 is movably disposed in the limiting hole 16, so that the roller unit 12 can be guided and limited to extend and retract relative to the foot cover body 11 in the receiving cavity. The elastic plate 1211 can swing inward and outward. When a force is applied to the elastic plate 1211 to make it swing inward, the limiting buckle 1212 can disengage from the limiting hole 16, thereby realizing the removal of the roller unit 12 from the receiving cavity. The removal operation is convenient, quick and easy.
[0035] In this embodiment, the surface of the foot cover body 11 is provided with a protrusion 17 for increasing friction. The protrusion 17 is a plurality of circular protrusions, which makes it easy to grip the foot cover 1 to quickly and stably install it onto the chair leg 21, or to remove the foot cover 1 from the chair leg 21.
[0036] See Figure 7-9 As shown, this utility model also provides a chair, including the aforementioned foot cover 1 and a chair body 20 with chair legs 21. One side of the foot cover body 11 is provided with an insertion hole 18, and the foot cover 1 is fixedly fitted onto the end of the chair leg 21 through the insertion hole 18. Specifically, positioning holes 22 are respectively provided on one side of the front and rear ends of the chair leg 21, and elastic buckles 19 are provided on the side of the foot cover body 11 corresponding to the insertion hole 18. The elastic buckles 19 are correspondingly and securely engaged with the positioning holes 22, thereby ensuring the installation stability of the foot cover 1.
[0037] In this embodiment, there are four foot covers 1 and two chair legs 21. The two chair legs 21 are arranged horizontally and horizontally and extend in the front-back direction. The four foot covers 1 are fixedly fitted on the front and back ends of the two chair legs 21 respectively, making the chair more balanced and stable as a whole.
[0038] In this embodiment, the sum of the elastic forces of all the elastic elements 15 on the chair is greater than the sum of the weights of the chair body 20 and all the foot cover bodies 11. As a result, in the initial state when no one is sitting on the chair, the elastic elements 15 can lift the chair body 20 and the foot cover bodies 11 upward so that the rollers 122 of the roller unit 12 make individual contact with the ground, thereby facilitating the movement of the chair.
[0039] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that any changes in form and detail made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims fall within the protection scope of the present invention.
Claims
1. A foot cover, characterized in that: The product includes a foot cover body, with a receiving cavity at the bottom of the foot cover body. A roller assembly that can extend and retract vertically is installed in the receiving cavity. The roller assembly includes a roller unit with a roller and an elastic element installed between the roller unit and the foot cover body. The elastic element is used to push the foot cover body upward so that the roller of the roller unit contacts the ground alone. The receiving cavity includes a main receiving cavity and auxiliary receiving cavities located on the left and right sides of the main receiving cavity. The roller is installed in the main receiving cavity, and the two support sleeves are detachably installed in the left and right auxiliary receiving cavities respectively. On the main body of the foot cover, a limiting hole is opened on the side of the secondary receiving cavity away from the main receiving cavity. On the side of the support sleeve away from the roller, an elastic plate extending downward is provided. A limiting buckle is provided on the outer side of the elastic plate, and the limiting buckle is movably positioned in the limiting hole.
2. The foot cover according to claim 1, characterized in that: The roller unit includes two support sleeves, and a rotating shaft is installed through the center of the roller. The two support sleeves are respectively fitted onto the two ends of the rotating shaft.
3. The foot cover according to claim 1, characterized in that: The elastic element is installed in the secondary receiving cavity, and the upper and lower ends of the elastic element abut against the inner top wall of the secondary receiving cavity and the top side of the support sleeve, respectively.
4. The foot cover according to claim 1, characterized in that: The elastic element is a spring; and / or the surface of the foot cover body is provided with protrusions to increase friction.
5. A chair, characterized in that: The chair body includes the foot cover as described in any one of claims 1-4 and a chair body with chair legs. One side of the foot cover body is provided with an insertion hole, and the foot cover is fixedly fitted onto the end of the chair leg through the insertion hole.
6. The chair according to claim 5, characterized in that: The sum of the elastic forces of all the elastic components on the chair is greater than the sum of the weights of the chair body and all the footrests.
7. The chair according to claim 6, characterized in that: There are four foot covers and two chair legs. The two chair legs are parallel to each other and extend forward and backward. The four foot covers are fixedly fitted onto the front and back ends of the two chair legs respectively.
8. The chair according to claim 7, characterized in that: Positioning holes are provided on one side of the front and rear ends of the chair legs, and elastic buckles are provided on the side of the main body of the foot cover corresponding to the insertion holes. The elastic buckles are locked and limited in place with the positioning holes.