Brake structure and learning chair

Abstract

The utility model provides a brake structure which comprises a chair wheel, a brake disc, a connecting seat, a driving disc and a driving assembly, the chair wheel comprises a wheel frame, a wheel body and a connecting shaft, the brake disc and the driving disc are both movably arranged on the connecting shaft in a sleeved mode, the brake disc is located above the wheel body, and the connecting seat is arranged above the brake disc and connected with the connecting shaft. The driving disc is located between the connecting base and the brake disc, and after the driving disc is rotated, the driving assembly is used for driving the driving disc and the brake disc to move along the connecting shaft so that the brake disc can abut against or be separated from the wheel body. According to the brake structure, the driving assembly drives the driving disc and the brake disc to ascend or descend by rotating the driving disc, so that braking or unlocking operation of the chair wheels is achieved, the overall structure is simple, and operation is convenient and fast. The utility model further provides a study chair which comprises the brake structure.

Description

Technical Field

[0001] The utility model relates to the technical field of casters, in particular to a brake structure and a study chair. Background Art

[0002] The chair wheels of the learning chair generally include fixed wheels and universal wheels, and the rotation of the chair wheels can facilitate the user to move the learning chair. In the prior art, the locking method of the chair wheels is usually to use the body weight to make the locking plate and the wheel plate of the chair wheel rub to achieve.

[0003] However, the user needs to move the seat to a suitable position before sitting down to lock the chair wheels. During this process, due to the limitation of the desktop, the user's body is in a half-sitting state when adjusting the final position of the seat. For younger children, due to their weak leg strength, it is inconvenient to use this type of learning chair. Utility Model Content

[0004] In view of the defects in the prior art, the purpose of the present utility model is to provide a brake structure and a study chair, which are convenient for users to brake or unlock the chair wheels.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a brake structure, including a chair wheel, including a wheel frame, and a wheel body and a connecting shaft arranged on the wheel frame; a brake disc, which is movably mounted on the connecting shaft, and the brake disc is located above the wheel body; a connecting seat, which is arranged above the brake disc and connected to the connecting shaft; a driving disc, which is movably mounted on the connecting shaft, and the driving disc is located between the connecting seat and the brake disc; and a driving assembly, which is used to drive the driving disc and the brake disc to move axially along the connecting shaft after rotating the driving disc, so that the brake disc abuts against or disengages from the wheel body.

[0006] Preferably, the driving assembly includes a reset member, a first push portion and a second push portion; the reset member is used to apply elastic force to the brake disc so that the brake disc, the driving disc and the connecting seat are sequentially abutted against each other; the first push portion is arranged on the driving disc, and the second push portion is arranged on the connecting seat, and the first push portion and the second push portion cooperate by rotating the driving disc.

[0007] Preferably, the first pushing portion includes at least one first protrusion, and the first protrusion is provided with a first helical surface on a side facing the connecting seat; the second pushing portion includes at least one second protrusion, and the second protrusion is provided with a second helical surface on a side facing the first protrusion, and the second helical surface is in contact with the first helical surface.

[0008] Preferably, an outer side wall of the connecting shaft is provided with an annular flange, the reset member is sleeved outside the connecting shaft, and two ends of the reset member abut against the annular flange and the brake disc respectively.

[0009] Preferably, a side of the brake disc facing the wheel body is provided with teeth.

[0010] Preferably, the teeth are arranged in a ring array along the axis of the brake disc.

[0011] Preferably, a shift block is provided on the driving disc.

[0012] Preferably, an indicating arrow is provided on the shift block.

[0013] Preferably, the drive disc is provided with a first through hole for the connecting shaft to pass through, and a circular groove is formed on one side of the drive disc facing the brake disc, and the circular groove is arranged concentrically with the first through hole; the brake disc is provided with a second through hole for the connecting shaft to pass through, and an annular boss is provided on the edge of the second through hole, and the annular boss extends into the circular groove.

[0014] The utility model also provides a study chair, comprising the above-mentioned brake structure.

[0015] Beneficial effects of the utility model:

[0016] The utility model discloses a brake structure, which drives the driving disc and the brake disc to rise or fall by rotating the driving disc, thereby achieving the braking or unlocking operation of the chair wheels. The overall structure is simple and the operation is convenient. At the same time, if the driving disc and the brake disc are designed as an integrated structure, during the rotation of the driving disc, the friction generated by the contact between the brake disc and the wheel body will cause difficulty in the rotation of the driving disc. Therefore, by designing the driving disc and the brake disc as separate structures, it is convenient for the user to rotate the driving disc to brake or unlock. The brake structure abandons the conventional structure that requires the use of human body weight to lock the chair wheels. The braking and unlocking operations are simple, which is convenient for the user to move the chair and improves the convenience of use.

[0017] The utility model also discloses a study chair, which is convenient for users to move or lock the position of the chair by using the brake structure, thereby improving the convenience of use and being suitable for promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0019] Figure 1 A schematic diagram of a brake structure provided in one embodiment of the utility model;

[0020] Figure 2 is a schematic diagram of the structure of the chair wheel;

[0021] Figure 3 It is a schematic diagram of the structure of the drive disk;

[0022] Figure 4 It is a structural schematic diagram of the connecting seat;

[0023] Figure 5 is a schematic diagram of the structure of the brake disc;

[0024] Figure 6 is a cross-sectional schematic diagram of the brake structure;

[0025] Figure 7 It is a structural schematic diagram of the brake structure from another perspective;

[0026] Figure 8 It is a structural schematic diagram of the drive disk from another perspective;

[0027] Fig. 9 This is a schematic diagram of the structure of the brake disc from another perspective;

[0028] Fig.10 is a structural diagram of a chair seat;

[0029] Reference numerals:

[0030] 10. Chair wheel; 11. Wheel frame; 12. Wheel body; 13. Connecting shaft; 131. Annular flange; 20. Brake disc; 21. Teeth; 22. Second through hole; 23. Annular boss; 30. Connecting seat; 31. Second protrusion; 311. Second helical surface; 40. Drive disc; 41. First protrusion; 411. First helical surface; 42. Shift block; 43. First through hole; 44. Circular groove; 50. Reset member; 60. Chair seat. DETAILED DESCRIPTION

[0031] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0032] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically limited.

[0035] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0036] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0037] Embodiment 1

[0038] like Figure 1-10As shown, in one embodiment of the utility model, a brake structure is provided, including a chair wheel 10, a brake disc 20, a connecting seat 30, a driving disc 40 and a driving assembly. The chair wheel 10 includes a wheel frame 11, a wheel body 12 and a connecting shaft 13. The wheel body 12 is rotatably arranged on the wheel frame 11, and the connecting shaft 13 is plugged into the wheel frame 11 along the vertical direction. The brake disc 20 and the driving disc 40 are both movably mounted (movably mounted means that they can move along the axis of the connecting shaft 13 and can rotate relative to the connecting shaft 13) on the connecting shaft 13, and the brake disc 20 is located above the wheel body 12. The connecting seat 30 is arranged above the brake disc 20 and connected to the connecting shaft 13. The connecting seat 30 is used to connect with the chair seat 60. The driving disc 40 is located between the connecting seat 30 and the brake disc 20. After the driving disc 40 is rotated, the driving assembly is used to drive the driving disc 40 and the brake disc 20 to move along the connecting shaft 13, so that the brake disc 20 abuts against or separates from the wheel body 12.

[0039] The user rotates the drive disc 40 to cause the drive assembly to drive the drive disc 40 and the brake disc 20 to move downward, so that the brake disc 20 abuts against the wheel body 12, and the brake disc 20 contacts and rubs against the wheel body 12, so that the chair wheel 10 cannot move, thereby completing the braking action. When unlocking is required, the user rotates the drive disc 40 in the opposite direction to cause the drive assembly to drive the drive disc 40 and the brake disc 20 to move upward, so that the brake disc 20 is separated from the wheel body 12. After the brake disc 20 is no longer restricted, the chair wheel 10 can move, thereby completing the unlocking action.

[0040] The present embodiment discloses a brake structure, which rotates the drive disc 40 to make the drive assembly drive the drive disc 40 and the brake disc 20 to rise or fall, thereby achieving the braking or unlocking operation of the chair wheel 10. The overall structure is simple and the operation is convenient. At the same time, if the drive disc 40 and the brake disc 20 are designed as an integrated structure, during the rotation of the drive disc 40, the friction force generated by the contact between the brake disc 20 and the wheel body 12 will make it difficult for the drive disc 40 to rotate. Therefore, by designing the drive disc 40 and the brake disc 20 as separate structures, it is convenient for the user to rotate the drive disc 40 to brake or unlock. This brake structure abandons the conventional structure that requires the use of human body weight to lock the chair wheel 10. The braking and unlocking operations are simple, which is convenient for the user to move the chair and improves the convenience of use.

[0041] The driving assembly includes a reset member 50, a first push portion and a second push portion. The reset member 50 is used to apply elastic force to the brake disc 20 so that the brake disc 20, the driving disc 40 and the connecting seat 30 abut against each other in sequence. The first push portion is arranged on the driving disc 40, and the second push portion is arranged on the connecting seat 30. The first push portion and the second push portion cooperate by rotating the driving disc 40.

[0042] Since the reset member 50 continuously applies an upward elastic force to the brake disc 20, when braking is required, the first push portion and the second push portion will be driven to cooperate with each other during the process of rotating the drive disc 40, thereby driving the drive disc 40 to move downward, and the drive disc 40 will simultaneously push the brake disc 20 to move downward. When the brake disc 20 abuts against the wheel body 12, the brake disc 20 and the wheel body 12 contact and rub, making the chair wheel 10 unable to move, thereby completing the braking action. At this time, the reset member 50 will further store energy.

[0043] When unlocking is required, the user rotates the driving disc 40 in the opposite direction, and after the first push portion cooperates with the second push portion, the brake disc 20 is pushed upward under the elastic force of the reset member 50, and the brake disc 20 simultaneously pushes the driving disc 40 upward. After the brake disc 20 is separated from the wheel body 12, the chair wheel 10 can move, thereby completing the unlocking action.

[0044] In this embodiment, the first push portion includes two first protrusions 41, and a first helical surface 411 is provided on a side of the first protrusion 41 facing the connection seat 30. The second push portion includes two second protrusions 31, each second protrusion 31 cooperates with a corresponding first protrusion 41, and a second helical surface 311 is provided on a side of the second protrusion 31 facing the first protrusion 41, and the second helical surface 311 is in contact with the first helical surface 411.

[0045] The first protrusion 41 is an integral structure with the driving disc 40, and the second protrusion 31 is also an integral structure with the connecting seat 30. Through the mutual contact between the first spiral surface 411 and the second spiral surface 311, and under the elastic force of the reset member 50, the driving disc 40 and the brake disc 20 can be lowered or raised during the rotation of the driving disc 40, thereby completing the braking or unlocking of the chair wheel 10, which is simple and convenient to operate, and improves the user experience.

[0046] Furthermore, an annular flange 131 is provided on the outer side wall of the connecting shaft 13, and a reset member 50 is sleeved outside the connecting shaft 13, and two ends of the reset member 50 respectively abut against the annular flange 131 and the brake disc 20. The reset member 50 is a spring, and during the downward movement of the brake disc 20, the reset member 50 will be further compressed to store energy in the reset member 50. When the drive disc 40 is rotated in the reverse direction, the reset member 50 will push the brake disc 20 and the drive disc 40 upward by the mutual cooperation of the first spiral surface 411 and the second spiral surface 311, so that the brake disc 20 is separated from the wheel body 12.

[0047] Furthermore, the brake disc 20 is provided with teeth 21 on one side facing the wheel body 12, and the teeth 21 are arranged in a ring array along the axis of the brake disc 20. By designing the teeth 21, the contact effect between the brake disc 20 and the outer wall of the wheel body 12 can be increased, thereby improving the locking effect.

[0048] In order to facilitate the user to operate the driving disk 40 to rotate and help the user quickly determine the operating direction, a shift block 42 is integrally formed on the driving disk 40 , and an indicator arrow is provided on the shift block 42 .

[0049] Furthermore, the drive disc 40 is provided with a first through hole 43 through which the connecting shaft 13 can pass, and a circular groove 44 is formed on one side of the drive disc 40 facing the brake disc 20, and the circular groove 44 is arranged concentrically with the first through hole 43. The brake disc 20 is provided with a second through hole 22 through which the connecting shaft 13 can pass, and an annular boss 23 is provided on the edge of the second through hole 22, and the annular boss 23 extends into the circular groove 44. This structural design enables the drive disc 40 and the brake disc 20 to always maintain coaxiality.

[0050] Embodiment 2

[0051] In another embodiment of the utility model, a study chair is provided, comprising the brake structure in the first embodiment, and further comprising a seat 60, wherein the connecting seat 30 is mounted and fixed on the seat 60, or the connecting seat 30 is an integral structure with the seat 60. By using the brake structure, it is convenient for the user to move or lock the position of the seat, which improves the convenience of use and is suitable for promotion.

[0052] In the specification of the present utility model, a lot of specific details are described. However, it is understood that the embodiments of the present utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this specification.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A brake structure, characterized in that: include: A chair wheel (10) comprises a wheel frame (11), a wheel body (12) and a connecting shaft (13) arranged on the wheel frame (11); A brake disc (20) movably sleeved on the connecting shaft (13), wherein the brake disc (20) is located above the wheel body (12); A connecting seat (30) is arranged above the brake disc (20) and connected to the connecting shaft (13); a driving disc (40) movably sleeved on the connecting shaft (13), the driving disc (40) being located between the connecting seat (30) and the brake disc (20); and The driving assembly is used to drive the driving disc (40) and the brake disc (20) to move axially along the connecting shaft (13) after the driving disc (40) is rotated, so that the brake disc (20) abuts against or separates from the wheel body (12).

2. The brake structure according to claim 1, characterized in that: The driving assembly comprises a reset member (50), a first push portion and a second push portion; The reset member (50) is used to apply elastic force to the brake disc (20) so that the brake disc (20), the drive disc (40) and the connecting seat (30) are in contact with each other in sequence; The first push portion is arranged on the driving disk (40), and the second push portion is arranged on the connecting seat (30), and the first push portion and the second push portion cooperate with each other by rotating the driving disk (40).

3. The brake structure according to claim 2, characterized in that: The first push portion comprises at least one first protrusion (41), and a first helical surface (411) is provided on a surface of the first protrusion (41) facing the connecting seat (30); The second push portion comprises at least one second protrusion (31); a second helical surface (311) is provided on a side of the second protrusion (31) facing the first protrusion (41); and the second helical surface (311) is in contact with the first helical surface (411).

4. The brake structure according to claim 2, characterized in that: The outer side wall of the connecting shaft (13) is provided with an annular flange (131), the reset member (50) is sleeved outside the connecting shaft (13), and the two ends of the reset member (50) respectively abut against the annular flange (131) and the brake disc (20).

5. The brake structure according to claim 1, characterized in that: The brake disc (20) is provided with teeth (21) on a side facing the wheel body (12).

6. The brake structure according to claim 5, characterized in that: The teeth (21) are arranged in a ring array along the axis of the brake disc (20).

7. The brake structure according to claim 1, characterized in that: The driving disc (40) is provided with a shifting block (42).

8. The brake structure according to claim 7, characterized in that: The shifting block (42) is provided with an indicating arrow.

9. The brake structure according to claim 1, characterized in that: The driving disc (40) is provided with a first through hole (43) through which the connecting shaft (13) can pass; a circular groove (44) is formed on one side of the driving disc (40) facing the brake disc (20); and the circular groove (44) is arranged concentrically with the first through hole (43); The brake disc (20) is provided with a second through hole (22) through which the connecting shaft (13) can pass, and an annular boss (23) is provided on the edge of the second through hole (22), and the annular boss (23) extends into the circular groove (44).

10. A study chair, characterized in that: The invention comprises the brake structure according to any one of claims 1 to 9.

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