An anti-slip lifting component for study tables and chairs
By setting elastically deformable damping parts in the lifting components of the learning table and chairs, the problem of table and chair dropping by themselves in the load-bearing state is solved, and higher convenience of use is achieved.
Patent Information
- Application Number
- CN202421506904.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-28
AI Technical Summary
The lifting and adjustment structure of existing learning tables and chairs is prone to slow down in the load-bearing state and needs frequent adjustments, which brings inconvenience to users.
An anti-sliding lifting assembly for learning tables and chairs is designed. By setting elastically deformable damping parts on the screw and the transmission shaft, the resistance during rotation is increased, and the tables and chairs are prevented from falling down by themselves during load bearing.
It effectively prevents the study tables and chairs from falling on their own in the load-bearing state, reduces the frequency of adjustment, and improves the convenience of use.
Smart Images
Figure CN222722637U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of furniture, in particular to an anti-slip lifting component for a study table and chair. Background Art
[0002] At present, the lifting adjustment of 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. Utility Model Content
[0003] In view of the defects in the prior art, the purpose of the utility model is to provide an anti-slip lifting assembly for study tables and chairs to solve or alleviate the above-mentioned technical problems existing in the prior art.
[0004] In order to achieve the above-mentioned purpose, the utility model provides an anti-slip lifting and lowering assembly for study tables and chairs, including a screw rod, a nut sleeve is provided on the outer coaxial sleeve of the screw rod, one end of the screw rod is transmission-connected to a transmission shaft, at least one of the screw rod and the transmission shaft is sleeved with an elastically deformable damping member, the inner side wall of the damping member abuts against the circumferential wall of the screw rod or the transmission shaft, and the damping member is used to increase the resistance of the screw rod and / or the transmission shaft during rotation.
[0005] Furthermore, a protrusion is provided on the inner side of the damping member, and a plurality of the protrusions are provided, and the plurality of the protrusions are sequentially spaced around the axis of the transmission shaft or the screw rod.
[0006] Furthermore, the inner side wall of the protrusion is in contact with the corresponding circumferential wall of the transmission shaft or the screw rod.
[0007] Further, a distance between a first side of the protrusion and an axial centerline of the damping member is smaller than a distance between a second side of the protrusion and an axial centerline of the damping member.
[0008] Furthermore, an extension portion is provided on a side of the second side of the protrusion facing the axis of the damping member, and the extension portion is used to increase the resistance encountered by the transmission shaft or the screw rod when rotating in a preset direction.
[0009] Furthermore, the damping element is in an annular structure.
[0010] Furthermore, the outer peripheral wall of the damping member is provided with a limiting groove matching with the limiting block to prevent the damping member from rotating along with the screw rod or the transmission shaft.
[0011] Furthermore, a plurality of the limit slots are provided, and the plurality of limit slots are arranged in sequence and at intervals around the axis of the damping member.
[0012] Furthermore, the damping member includes at least one damping body, and one side of the damping body is provided with a groove matching with the transmission shaft or the screw rod.
[0013] Furthermore, the cross section of the damping body is polygonal.
[0014] Beneficial effects of the utility model:
[0015] The anti-slip lifting assembly for study tables and chairs provided by the utility model increases the resistance encountered by the screw rod or the transmission shaft when rotating by arranging a damping member, thereby achieving the purpose of preventing or alleviating the tables and chairs from falling automatically when bearing a load. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] 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.
[0017] Figure 1 A three-dimensional view of an anti-slip lifting assembly for a study table and chair provided in one embodiment of the utility model;
[0018] Figure 2 for Figure 1 A cross-sectional view in the AA direction is shown;
[0019] Figure 3 for Figure 1 An exploded perspective view of an anti-slip lifting assembly for a study table and chair shown;
[0020] Figure 4 A physical view of a damping member of an anti-slip lifting assembly for a study table and chair provided by an embodiment of the utility model;
[0021] Figure 5 A physical view of a damping member of an anti-slip lifting assembly for a study table and chair provided by another embodiment of the utility model.
[0022] Reference numerals:
[0023] 110, screw rod; 120, nut sleeve; 121, limit block; 210, transmission shaft; 220, first gear; 230, second gear; 240, gear box; 300, damping member; 310, protrusion; 320, extension; 330, limit slot; 340, groove. DETAILED DESCRIPTION
[0024] 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.
[0025] 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.
[0026] 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.
[0027] 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.
[0028] 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.
[0029] 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" or "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" or "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.
[0030] like Figure 1-5 As shown, the utility model provides an anti-slip lifting assembly for a study table and chair, including a screw rod 110, a nut sleeve 120 coaxially sleeved outside the screw rod 110 is provided to match the screw rod 110, and one end of the screw rod 110 is connected to a transmission shaft 210. The transmission shaft 210 is used to transmit input power to the screw rod 110 to adjust the position of the nut sleeve 120 on the screw rod 110, thereby achieving purposes such as lifting and lowering.
[0031] When in use, the screw rod 110 is rotatably connected to the component A, and the nut sleeve 120 is fixedly connected to the component B. By rotating the screw rod 110, the purpose of driving the component B to change its position relative to the component A can be achieved, thereby achieving purposes such as lifting and lowering.
[0032] It should be noted that the transmission shaft 210 here can be either the transmission shaft 210 in the transmission structure or the power input shaft. In this embodiment, the lifting assembly further includes a gear box 240, in which a first gear 220 and a second gear 230 meshing with each other are rotatably arranged, the first gear 220 is transmission-connected to the driving handle through the transmission shaft 210, and the second gear 230 is coaxially arranged with the screw rod 110 and fixedly connected to the screw rod 110.
[0033] At least one of the screw rod 110 and the transmission shaft 210 is sleeved with an elastically deformable damping member 300, the inner side wall of the damping member 300 abuts against the circumferential wall of the screw rod 110 or the transmission shaft 210, and the damping member 300 is used to increase the resistance of the screw rod 110 and / or the transmission shaft 210 when rotating.
[0034] When in use, a damping member 300 is provided on the outer periphery of the transmission shaft 210 and / or the screw rod 110. Specifically, the damping member 300 is made of a flexible material that can be elastically deformed, such as rubber, silicone, etc. Under the action of the damping member 300, the transmission shaft 210 and / or the screw rod 110 need to overcome a large resistance to rotate. Therefore, when the force-bearing component (such as a study table, a study chair, and a movable table top of the study table) bears the load, the screw rod 110 and / or the transmission shaft 210 is not easy to reversely rotate, so that the force-bearing component is not easy to fall.
[0035] In one embodiment, a protrusion 310 is disposed on the inner side of the damping member 300 , and a plurality of protrusions 310 are disposed, and the plurality of protrusions 310 are sequentially spaced around the axis of the transmission shaft 210 or the screw rod 110 .
[0036] By providing the protrusions 310, since there are gaps between adjacent protrusions 310, the protrusions 310 are easy to deform, which can not only increase the friction force on the screw rod 110 and the transmission shaft 210 when they rotate, but also prevent the screw rod 110 and / or the transmission shaft 210 from getting stuck.
[0037] Preferably, the protrusions 310 are evenly arranged around the axis of the transmission shaft 210 or the screw rod 110 to achieve the purpose of making the transmission shaft 210 or the screw rod 110 evenly stressed.
[0038] Preferably, the inner side wall of the protrusion 310 is fitted with the circumferential wall of the corresponding transmission shaft 210 or the screw rod 110 to increase the contact area between the protrusion 310 and the transmission shaft 210 or the screw rod 110. The larger the contact area between the protrusion 310 and the transmission shaft 210 or the screw rod 110, the more protrusions 310 need to be compressed, and the greater the resistance encountered by the screw rod 110 and the transmission shaft 210.
[0039] Preferably, the distance between the first side of the protrusion 310 and the axis line of the damping member 300 is smaller than the distance between the second side of the protrusion 310 and the axis line of the damping member 300, so that only the second side of the protrusion 310 is deformed more significantly, thereby preventing the screw rod 110 and / or the transmission shaft 210 from getting stuck.
[0040] Preferably, an extension portion 320 is provided on the side of the second side of the protrusion 310 facing the axis of the damping member 300 , and the extension portion 320 is used to increase the resistance encountered by the transmission shaft 210 or the screw rod 110 when rotating in a preset direction.
[0041] Specifically, when the transmission shaft 210 and / or the screw rod 110 rotates in the clockwise direction, the force-bearing component (for example, a study table, a study chair, or a movable table top of a study table) rises, and when the transmission shaft 210 and / or the screw rod 110 rotates in the counterclockwise direction, the force-bearing component (for example, a study table, a study chair, or a movable table top of a study table) descends. The preset direction is the counterclockwise direction, and vice versa, the preset direction is the clockwise direction.
[0042] Here, taking the preset direction as the counterclockwise direction as an example, the working principle of this embodiment is described in detail.
[0043] When the transmission shaft 210 and / or the screw rod 110 rotates in the clockwise direction, under the action of the friction between the transmission shaft 210 or the screw rod 110 and the protrusion 310, the extension portion 320 moves and deforms toward the gap between two adjacent protrusions 310, thereby not causing a large resistance to the rotation of the screw rod 110 and / or the transmission shaft 210; and when the transmission shaft 210 and / or the screw rod 110 rotates in the counterclockwise direction, under the action of the friction between the transmission shaft 210 or the screw rod 110 and the protrusion 310, Down, the extension portion 320 moves and deforms toward the middle of the protrusion 310, so as to increase the extrusion between the protrusion 310 and the screw rod 110 or the transmission shaft 210, thereby increasing the friction between the screw rod 110 and / or the transmission shaft 210 and the damping member 300, thereby increasing the resistance encountered by the transmission shaft 210 or the screw rod 110 when rotating in a preset direction, thereby preventing the force-bearing components (for example: study tables, study chairs or movable table tops of study tables) from falling by themselves when bearing weight.
[0044] like Figure 4 As shown, in one embodiment, the damping member 300 is annular in structure. The outer peripheral wall of the damping member 300 of this structure is provided with a limit card slot 330 matching the limit card block 121 to prevent the damping member 300 from rotating with the screw rod 110 or the transmission shaft 210. For example, in this embodiment, the damping member 300 is embedded in one end of the nut sleeve 120, the damping member 300 is provided with a limit card slot 330, and the nut sleeve 120 is provided with a limit card block 121 matching the limit card slot 330, so as to achieve the purpose of preventing the damping member 300 from rotating with the screw rod 110.
[0045] Preferably, a plurality of limit slots 330 are provided, and the plurality of limit slots 330 are sequentially arranged at intervals around the axis of the damping member 300 to achieve the purpose of improving the limiting effect and stability of the damping member 300. Preferably, the limit slots 330 are evenly arranged around the axis of the damping member 300.
[0046] like Figure 5 As shown, in one embodiment, the damping member 300 includes at least one damping body, and a groove 340 matching with the transmission shaft 210 or the screw rod 110 is provided on one side of the damping body. The damping member 300 of this structure can be assembled by buckling the damping body on the transmission shaft 210 or the screw rod 110, and the assembly is convenient.
[0047] The protrusion 310 is arranged on the side wall of the groove 340. Preferably, the cross section of the damping body is polygonal, so as to prevent the damping body from rotating with the rotation of the screw 110 or the transmission shaft 210 by the damping body contacting with the corresponding parts. For example, in this embodiment, the damping body is arranged in the gear box 240, there is only one damping body, and the damping body is sleeved on the transmission shaft 210, and the side of the damping body corresponding to the groove 340 is in contact with the gear box 240. Since the cross section of the damping body is polygonal, the damping body will not rotate with the rotation of the transmission shaft 210.
[0048] 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.
[0049] 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 deviate the essence of the corresponding technical solutions 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. An anti-slip lifting assembly for a study table and chair, comprising a screw rod (110), a nut sleeve (120) is coaxially sleeved outside the screw rod (110), one end of the screw rod (110) is transmission-connected to a transmission shaft (210), characterized in that: At least one of the screw rod (110) and the transmission shaft (210) is sleeved with an elastically deformable damping member (300), the inner side wall of the damping member (300) abuts against the circumferential wall of the screw rod (110) or the transmission shaft (210), and the damping member (300) is used to increase the resistance of the screw rod (110) and / or the transmission shaft (210) when they rotate.
2. The anti-slip lifting assembly for study tables and chairs according to claim 1, characterized in that: A protrusion (310) is provided on the inner side of the damping member (300), and a plurality of the protrusions (310) are provided, and the plurality of protrusions (310) are sequentially spaced around the axis of the transmission shaft (210) or the screw rod (110).
3. The anti-slip lifting assembly for study tables and chairs according to claim 2, characterized in that: The inner side wall of the protruding portion (310) is in contact with the circumferential wall of the corresponding transmission shaft (210) or the screw rod (110).
4. The anti-slip lifting assembly for study tables and chairs according to claim 2 or 3, characterized in that: The distance between the first side of the protrusion (310) and the axis center line of the damping member (300) is smaller than the distance between the second side of the protrusion (310) and the axis center line of the damping member (300).
5. The anti-slip lifting assembly for study tables and chairs according to claim 4, characterized in that: An extension portion (320) is provided on the side of the second side of the protrusion (310) facing the axis of the damping member (300), and the extension portion (320) is used to increase the resistance encountered by the transmission shaft (210) or the screw rod (110) when rotating in a preset direction.
6. The anti-slip lifting assembly for study tables and chairs according to claim 1, 2, 3 or 5, characterized in that: The damping member (300) is in an annular structure.
7. The anti-slip lifting assembly for study tables and chairs according to claim 6, characterized in that: The outer peripheral wall of the damping member (300) is provided with a limiting groove (330) matching the limiting block (121) to prevent the damping member (300) from rotating along with the screw rod (110) or the transmission shaft (210).
8. The anti-slip lifting assembly for study tables and chairs according to claim 7, characterized in that: A plurality of the limit slots (330) are provided, and the plurality of limit slots (330) are arranged in sequence and at intervals around the axis of the damping member (300).
9. The anti-slip lifting assembly for study tables and chairs according to claim 1, 2, 3 or 5, characterized in that: The damping member (300) comprises at least one damping body, and a groove (340) matching with the transmission shaft (210) or the screw rod (110) is provided on one side of the damping body.
10. The anti-slip lifting assembly for study tables and chairs according to claim 9, characterized in that: The cross section of the damping body is polygonal.