A check assembly, telescopic device and lifting leg

Abstract

The utility model belongs to the technical field of learning furniture, and provides a check assembly, a telescopic device and a lifting leg. The check assembly is arranged between a driven rotating element and an active rotating element for driving the driven rotating element to rotate. The active rotating element and the driven rotating element are connected by transmission through the check assembly. The check assembly includes: an elastic member with a variable diameter, an auxiliary member fixedly connected to a frame is disposed on the outer cover of the elastic member, and in a natural state, the elastic member and the inner side wall of the auxiliary member are in contact and have friction; and an adjustment structure, which is connected by transmission with the active rotating element and the driven rotating element. The check assembly, telescopic device and lifting leg provided by the utility model have a simple structure and a reasonable design, and can prevent the driven rotating element from actively rotating.

Description

Technical Field

[0001] The utility model relates to the technical field of learning furniture, in particular to a check assembly, a telescopic device and a lifting leg. Background Art

[0002] At present, the lifting and lowering adjustment of furniture (such as study tables and study chairs) and the pitch angle adjustment of movable table tops are all achieved through the coordinated drive of screw rods and nut sleeves, so that users can make corresponding adjustments according to needs, which greatly facilitates people's lives. However, the coordinated structure of the screw rod and the nut sleeve will cause the study table, study chair or movable table top to slowly descend under the load-bearing state, and usually needs to be readjusted after a period of use, which causes inconvenience to users. Summary of the invention

[0003] In view of the defects in the prior art, the purpose of the utility model is to provide a check assembly, a telescopic device and a lifting leg to solve or alleviate the above-mentioned problems in the prior art.

[0004] In order to achieve the above-mentioned purpose, in a first aspect, the utility model provides a check assembly, which is arranged between a driven rotating element and an active rotating element for driving the driven rotating element to rotate, the active rotating element and the driven rotating element are connected by the check assembly, and is used to increase the resistance of the driven rotating element when the driven rotating element rotates due to an external force, including:

[0005] An elastic member with a variable diameter, wherein an auxiliary member fixedly connected to the frame is disposed on the outer cover of the elastic member, and in a natural state, the elastic member contacts with the inner side wall of the auxiliary member and has friction; and

[0006] The adjusting structure is transmission-connected with the active rotating element and the driven rotating element, and when the active rotating element drives the driven rotating element to rotate, the active rotating element reduces the radius of the elastic member through the adjusting structure to reduce or eliminate the friction between the elastic member and the auxiliary member, and when the driven rotating element rotates due to an external force, the driven rotating element increases the radius of the elastic member through the adjusting structure to increase the friction between the elastic member and the auxiliary member.

[0007] Furthermore, the regulating structure comprises:

[0008] A first adjusting member connected to the driven rotating element and capable of rotating together with the driven rotating element; and

[0009] A second adjusting member, which is transmission-connected to the active rotating element and can rotate together with the second adjusting member;

[0010] Wherein, by driving the first adjusting member to rotate through the driven rotating element, the first adjusting member can be brought into contact with the target free end of the elastic member, so that the radius of the elastic member increases due to deformation;

[0011] By driving the second adjusting member to rotate through the active rotating element, the second adjusting member can be made to collide with the target free end of the elastic member, so that the radius of the elastic member becomes smaller due to deformation, and after the second adjusting member is in contact with the free end of the elastic member, it can also be in contact with the second adjusting member, so as to drive the driven rotating element to rotate through the second adjusting member.

[0012] Furthermore, the elastic member is a spring or a torsion spring.

[0013] In a second aspect, the utility model further provides a telescopic device, comprising a screw rod and a nut sleeve sleeved on the screw rod and matched with the screw rod, and also comprising any one of the above-mentioned check assembly.

[0014] Furthermore, the driven rotating element is the screw rod, and the active rotating element is an element used to drive the screw rod to rotate.

[0015] Furthermore, it also includes a gear box, which includes a box body and a first gear arranged in the box body, the first gear is connected to the screw through the check assembly, the driven rotating element is the screw, the active rotating element is the first gear, and the auxiliary component is the box body.

[0016] Furthermore, it also includes a transmission shaft, which is transmission-connected to the screw rod, the driven rotating element is the transmission shaft, and the active rotating element is an element that drives the transmission shaft to rotate.

[0017] Furthermore, the transmission shaft is transmission-connected to the screw rod via a gear box, and the auxiliary component is the gear box.

[0018] Furthermore, the transmission shaft is transmission-connected to the driving handle via the check assembly, and the active rotating element is the driving handle.

[0019] In a third aspect, the utility model further provides a lifting leg, comprising any one of the telescopic devices described above.

[0020] Beneficial effects of the utility model:

[0021] The check assembly, telescopic device and lifting leg provided by the utility model are provided with an elastic member with a variable diameter and an adjusting assembly. When the active rotating element drives the driven rotating element to rotate, the active rotating element reduces the diameter of the elastic member through the adjusting assembly, so that the friction between the elastic member and the inner side wall of the auxiliary member becomes smaller or disappears, thereby achieving the purpose of driving the driven rotating element to rotate; when the driven rotating element actively rotates, the driven rotating element increases the radius of the elastic member through the adjusting assembly, thereby achieving the purpose of preventing the driven rotating element from actively rotating, and further achieving the purpose of preventing the study table, study chair or movable table top from slowly descending under the condition of bearing weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 An exploded perspective view of a telescopic device provided by an embodiment of the utility model;

[0024] Figure 2 for Figure 1 An exploded perspective view of the telescopic device shown in another direction;

[0025] Figure 3 An exploded stereoscopic view of a telescopic device provided in yet another embodiment of the utility model.

[0026] Reference numerals:

[0027] 110, elastic member; 120, first adjusting member; 130, second adjusting member; 210, screw rod; 310, housing; 320, first gear; 330, second gear; 410, transmission shaft; 510, driving handle. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] like Figure 1-3As shown, the utility model provides a check assembly, which is arranged between a driven rotating element and an active rotating element for driving the driven rotating element to rotate, and the active rotating element and the driven rotating element are connected by the check assembly, which is used to increase the resistance of the driven rotating element when the driven rotating element rotates due to an external force, so that the driven rotating element cannot rotate actively, but can only rotate under the driving power transmitted from the active rotating element. It should be noted that the external force here refers to the force other than the driving power transmitted from the active rotating element.

[0035] The check assembly includes an elastic member 110 and an adjustment structure.

[0036] The diameter of the elastic member 110 is variable. Specifically, the elastic member 110 may be a spring, a torsion spring or an elastic sleeve with a variable diameter. In this embodiment, the elastic member 110 is a spring. An auxiliary member fixedly connected to the frame is disposed outside the elastic member 110. In a natural state, the elastic member 110 contacts the inner side wall of the auxiliary member and has friction, so that the elastic member 110 cannot rotate without reducing its diameter.

[0037] The adjustment structure is in transmission connection with the active rotating element and the driven rotating element, and when the active rotating element drives the driven rotating element to rotate, the adjustment structure makes the radius of the elastic member 110 smaller to reduce or eliminate the friction between the elastic member 110 and the auxiliary member, so that the active rotating element can drive the driven rotating element to rotate. When the driven rotating element rotates due to an external force, the adjustment structure makes the radius of the elastic member 110 larger to increase the friction between the elastic member 110 and the auxiliary member, so that the driven rotating element cannot rotate under the action of the friction between the elastic member 110 and the auxiliary member.

[0038] Specifically, the adjustment structure includes a first adjustment member 120 and a second adjustment member 130 .

[0039] The first adjusting member 120 is coaxially arranged with the driven rotating element and is in transmission connection with the driven rotating element. Specifically, the first adjusting member 120 can be fixedly connected with the driven rotating element, or can be integrally formed with the driven rotating element, or can be in transmission connection with the first adjusting member 120 or the driven rotating element through a non-circular hole provided on one of the first adjusting member 120 or the driven rotating element and a non-circular transmission shaft provided on one of the first adjusting member 120 or the driven rotating element.

[0040] The second adjusting member 130 is coaxially arranged with the active rotating element and is in transmission connection with the active rotating element. Specifically, the second adjusting member 130 can be fixedly connected with the active rotating element, or can be integrally formed with the active rotating element, or can be in transmission connection with the second adjusting member 130 through a non-circular hole provided on one of the second adjusting member 130 or the active rotating element and a non-circular transmission shaft provided on one of the second adjusting member 130 or the active rotating element.

[0041] By driving the first adjusting member 120 to rotate through the driven rotating element, the first adjusting member 120 can be made to collide with the target free end of the elastic member 110, so that the radius of the elastic member 110 increases due to deformation. Specifically, when the driven rotating element drives the first adjusting member 120 to rotate forward, the first adjusting member 120 is in contact with one end of the elastic member 110, and when the driven rotating element drives the first adjusting member 120 to rotate reversely, the first adjusting member 120 is in contact with the other end of the elastic member 110.

[0042] When in use, no matter whether the driven rotating element rotates forward or backward, the driven rotating element will drive the first adjusting member 120 to rotate, so that the first adjusting member 120 conflicts with one end of the elastic member 110. Due to the friction between the elastic member 110 and the auxiliary member, the elastic member 110 cannot rotate. Therefore, the first adjusting member 120 drives one end of the elastic member 110 to move, causing the elastic member 110 to deform and increase its radius, thereby achieving the purpose of further increasing the friction between the elastic member 110 and the auxiliary member, thereby achieving the purpose of rotating the driven rotating element.

[0043] By driving the second adjusting member 130 to rotate through the active rotating element, the second adjusting member 130 can be made to collide with the target free end of the elastic member 110, so that the radius of the elastic member 110 becomes smaller due to deformation. When the active rotating element drives the second adjusting member 130 to rotate in the forward direction, the second adjusting member 130 collide with one end of the elastic member 110, and when the active rotating element drives the second adjusting member 130 to rotate in the reverse direction, the second adjusting member 130 collide with the other end of the elastic member 110. After the second adjusting member 130 collide with the free end of the elastic member 110, it can also collide with the first adjusting member 120, so as to drive the driven rotating element to rotate through the first adjusting member 120.

[0044] When in use, regardless of whether the active rotating element rotates forward or backward, the active rotating element will drive the second adjusting element 130 to rotate, so that the second adjusting element 130 contacts one end of the elastic element 110. Because the elastic element 110 cannot rotate under the friction between the elastic element 110 and the auxiliary element, the second adjusting element 130 drives one end of the elastic element 110 to move, so that the elastic element 110 is deformed and the radius becomes smaller, thereby achieving the purpose of reducing or eliminating the friction between the elastic element 110 and the auxiliary element, and then achieving the purpose of driving the driven rotating element to rotate through the active rotating element. Specifically, the active rotating element continues to rotate, thereby driving the second adjusting element 130 to rotate, so that the second adjusting element 130 contacts the first adjusting element 120, thereby driving the first adjusting element 120 to rotate, and then driving the driven element to rotate through the first adjusting element 120.

[0045] like Figure 1-3 As shown, the utility model also provides a telescopic device, including a screw rod 210 and a nut sleeve sleeved on the screw rod 210 and matched with the screw rod 210, and also includes any one of the above-mentioned check components. Specifically, the above-mentioned driven rotating element is the screw rod 210, and the active rotating element is an element used to drive the screw rod 210 to rotate.

[0046] In one embodiment, the telescopic device further includes a gear box, the gear box includes a box body 310 and a first gear 320 disposed in the box body 310, the first gear 320 is transmission-connected to the screw rod 210 through a check assembly, the driven rotating element is the screw rod 210, the active rotating element is the first gear 320, and the auxiliary part is the box body 310. The gear box further includes a second gear 330, the second gear 330 is transmission-connected to the power device, and the second gear 330 is transmission-connected to the first gear 320. The driving device can be a motor or a driving handle 510. In this embodiment, the power device is the driving handle 510.

[0047] In one embodiment, a transmission shaft 410 is further included. The transmission shaft 410 is in transmission connection with the screw rod 210 . The driven rotating element is the transmission shaft 410 , and the active rotating element is an element that drives the transmission shaft 410 to rotate.

[0048] In one embodiment, the transmission shaft 410 is transmission-connected to the screw rod 210 via a gear box, and the auxiliary component is the gear box.

[0049] In one embodiment, the transmission shaft 410 is transmission-connected to the driving handle 510 via a check assembly, and the active rotating element is the driving handle 510 .

[0050] In a third aspect, the utility model also provides a lifting leg, comprising any one of the telescopic devices described above.

[0051] 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.

[0052] 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 check assembly, which is arranged between a driven rotating element and an active rotating element coaxially arranged with the driven rotating element and used to drive the driven rotating element to rotate, the active rotating element and the driven rotating element are connected by the check assembly, and is used to increase the resistance of the driven rotating element when the driven rotating element rotates due to an external force, characterized in that: include: an elastic member (110) with a variable diameter, wherein an auxiliary member fixedly connected to the frame is disposed on the outer cover of the elastic member (110), and in a natural state, the elastic member (110) contacts the inner side wall of the auxiliary member and has friction; and An adjustment structure is in transmission connection with the active rotating element and the driven rotating element, and when the active rotating element drives the driven rotating element to rotate, the active rotating element causes the radius of the elastic member (110) to become smaller through the adjustment structure, so as to reduce or eliminate the friction between the elastic member (110) and the auxiliary member, and when the driven rotating element rotates due to an external force, the driven rotating element causes the radius of the elastic member (110) to become larger through the adjustment structure, so as to increase the friction between the elastic member (110) and the auxiliary member.

2. The check assembly according to claim 1, characterized in that: The regulating structure comprises: A first adjusting member (120) connected to the driven rotating element and capable of rotating together with the driven rotating element; and A second adjusting member (130) which is transmission-connected to the active rotating element and can rotate together with the second adjusting member; wherein the first adjusting member (120) is driven to rotate by the driven rotating element, so that the first adjusting member (120) can collide with the target free end of the elastic member (110), so that the radius of the elastic member (110) increases due to deformation; By driving the second adjusting member (130) to rotate through the active rotating element, the second adjusting member (130) can be brought into contact with the target free end of the elastic member (110), so that the radius of the elastic member (110) becomes smaller due to deformation; and after the second adjusting member (130) contacts the free end of the elastic member (110), it can also contact the second adjusting member (130), so as to drive the driven rotating element to rotate through the second adjusting member (130).

3. The check assembly according to claim 1 or 2, characterized in that: The elastic member (110) is a spring or a torsion spring.

4. A telescopic device, comprising a screw rod (210) and a nut sleeve sleeved on the screw rod (210) and matched with the screw rod (210), characterized in that: It also includes the check assembly according to any one of claims 1 to 3.

5. The telescopic device according to claim 4, characterized in that: The driven rotating element is the screw rod (210), and the active rotating element is an element used to drive the screw rod (210) to rotate.

6. The telescopic device according to claim 5, characterized in that: The invention also comprises a gear box, the gear box comprising a box body (310) and a first gear (320) arranged in the box body (310), the first gear (320) being transmission-connected to the screw rod (210) via the check assembly, the active rotating element being the first gear (320), and the auxiliary component being the box body (310).

7. The telescopic device according to claim 4, characterized in that: It also includes a transmission shaft (410), the transmission shaft (410) being transmission-connected to the screw rod (210), the driven rotating element being the transmission shaft (410), and the active rotating element being an element that drives the transmission shaft (410) to rotate.

8. The telescopic device according to claim 7, characterized in that: The transmission shaft (410) is transmission-connected to the screw rod (210) via a gear box, and the auxiliary component is the gear box.

9. The telescopic device according to claim 8 or 7, characterized in that: The transmission shaft (410) is transmission-connected to the driving handle (510) via the non-return assembly, and the active rotating element is the driving handle (510).

10. A lifting leg, characterized in that: The telescopic device comprises the telescopic device according to any one of claims 4 to 9.

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