CN110801102B

CN110801102B - Height-adjustable table leg

Info

Publication number: CN110801102B
Application number: CN201810884284.3A
Authority: CN
Inventors: 可文山
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-08-06
Filing date: 2018-08-06
Publication date: 2022-07-05
Anticipated expiration: 2038-08-06
Also published as: CN110801102A

Abstract

The invention relates to a height-adjustable table leg, which comprises a fixed outer tube, a movable inner tube and a plurality of rolling pieces. The movable inner tube has two first outer surfaces and two second outer surfaces which are parallel to each other, and the movable tube can be sleeved and fixed with the outer tube in a displaceable manner along the height direction. The rolling members are arranged on the first outer surface or the second outer surface in a rolling mode in situ, and the rolling members partially protrude out of the first outer surface or the second outer surface and contact the pipe wall of the fixed outer pipe, so that when the movable inner pipe is displaced, the rolling members can roll. Through the design of the rolling part, the friction force between the fixed outer pipe and the movable inner pipe can be effectively reduced.

Description

Height-adjustable table leg

Technical Field

The invention relates to a table leg, in particular to a table leg with adjustable height.

Background

In order to meet the requirements of different users on the height of the desktop, a common desk, computer desk or office desk is usually provided with a set of adjusting devices in terms of structure so that the users can adjust the height of the desk feet at any time. The height adjustable table leg mainly comprises a fixed outer tube and a movable inner tube arranged in the fixed inner tube in a penetrating way, and the effect of adjusting the height of the table leg can be achieved through the vertical displacement of the movable inner tube relative to the fixed outer tube.

However, friction is easily generated between the fixed outer tube and the movable inner tube, and further, the problems of surface abrasion and noise between the fixed outer tube and the movable inner tube are generated, so that the conventional height-adjustable table leg still has room for improvement in structure.

Disclosure of Invention

In view of the above problems, the present invention is to provide a height adjustable table leg, which can reduce the surface abrasion during the height adjustment process.

In order to achieve the above object, the present invention provides a height-adjustable table leg, comprising: a fixed outer tube; a movable inner tube in the form of a hollow square column and having two first outer surfaces parallel to each other and two second outer surfaces parallel to each other, the movable inner tube having a height direction along which the movable inner tube can be displaceably fitted over the fixed outer tube; the rolling pieces can be arranged on the two first outer surfaces or the two second outer surfaces in an in-situ rolling mode, and each rolling piece partially protrudes out of the two first outer surfaces or the two second outer surfaces and contacts the pipe wall of the fixed outer pipe, so that each rolling piece can roll when the movable inner pipe is displaced along the height direction.

In the technical scheme of the invention, each rolling part comprises a rolling shaft and two wheel bodies, and the two wheel bodies are sleeved at two opposite ends of the rolling shaft.

The two wheel bodies are rotatably sleeved at two opposite ends of the rolling shaft.

Each rolling piece is arranged on the two first outer surfaces and the two second outer surfaces in a manner of rolling in situ.

The rolling device is characterized by further comprising a lining, wherein the lining is a hollow square column and is sleeved in the movable inner tube, at least one accommodating groove is formed in each first outer surface and each second outer surface, the configuration of each accommodating groove is the same as that of the section of each rolling piece, and each rolling piece is arranged in each accommodating groove in a one-to-one correspondence mode and is abutted against the outer wall surface of the lining.

The outer wall surface of the bushing is further provided with a plurality of open holes, and the positions of the open holes correspond to the positions of the wheel bodies of the rolling parts one by one.

Each rolling element is a ball or a cylindrical roller.

The air pressure rod is provided with a telescopic rod, the fixed outer tube is provided with a bottom plate, the air pressure rod is arranged in the movable inner tube, and the tail end of the telescopic rod is connected with the bottom plate.

The rolling device comprises a movable inner tube, a plurality of rolling pieces and a plurality of first outer surfaces, wherein the movable inner tube is fixedly connected with the inner wall of the movable inner tube, the first outer surfaces and the second outer surfaces are respectively provided with at least one containing groove, the configuration of each containing groove is the same as that of the section of each rolling piece, and each rolling piece is correspondingly arranged in each containing groove one by one and is abutted against one of the four plate bodies.

By adopting the technical scheme, when a user needs to adjust the height of the table leg and move the movable inner tube upwards, the movable inner tube can reduce the friction force between the fixed outer tube and the movable inner tube through the rolling of the rolling piece, the surface abrasion between the movable inner tube and the fixed outer tube is reduced, and abnormal sound is not easy to generate.

Drawings

FIG. 1 is a perspective view of a table leg according to an embodiment of the present invention, wherein the position of the fixed outer tube is shown by imaginary lines;

FIG. 2 is an exploded view of an embodiment of the invention table leg;

FIG. 3 is an enlarged view of the rolling elements in an embodiment of the present invention;

FIG. 4 is a perspective view of a movable inner tube in an embodiment of the present invention;

FIG. 5 is an enlarged view of a bushing in an embodiment of the invention;

fig. 6A and 6B are schematic diagrams illustrating the operation of the table leg according to the present invention.

Detailed Description

The details of the structure, features, assembly and use of the present invention will be described in detail with reference to the following embodiments and accompanying drawings, however, it should be understood that the embodiments and drawings described below are only for illustrative purposes and should not be used to limit the scope of the invention.

Technical contents and features of the embodiments will be described in detail below with reference to several embodiments and accompanying drawings, and directional terms such as "upper", "lower", "inner", "outer", "top" and "bottom" and the like in the following embodiments are only exemplary terms with reference to a normal use direction, and are not intended to limit a protection scope.

An embodiment is now described as follows. As shown in fig. 1 and 2, the table leg 1 comprises a fixed outer tube 10, a movable inner tube 20, twelve rolling members 30 and a bushing 40, wherein:

the fixed outer tube 10 is a hollow square column with a square cross section, and the top end of the fixed outer tube 10 is provided with an opening 11 and the bottom end is provided with a bottom plate 12.

The movable inner tube 20 is also a hollow square column, which has a square cross section and a height direction H (in the embodiment, the height direction H is equal to the axial direction of the movable inner tube 20). The movable inner tube 20 has two first outer surfaces 21 and two second outer surfaces 22 parallel to each other. As shown in fig. 2 and 4, the first outer surface 21 and the second outer surface 22 are both provided with three receiving grooves 23, the three receiving grooves 23 are spaced up and down, a positioning hole 24 is provided between any two adjacent receiving grooves 23, and the position of the positioning hole 24 corresponds to the screw hole 42 of the bushing 40 (as shown in fig. 5). The receiving grooves 23 have substantially the same configuration as the cross-sectional configuration of the rolling members 30, and each receiving groove 23 is used to dispose one of the rolling members 30 in a one-to-one correspondence. The movable inner tube 20 is movably sleeved in the fixed outer tube 10 along the height direction H, and the top end of the movable inner tube 20 is used for fixing a table (not shown). As shown in fig. 2 and fig. 6A, an air pressure rod 7 is disposed in the movable inner tube 20, a switch seat 8 is disposed above the air pressure rod 7, and a touch switch 81 is disposed in the switch seat 8. The pneumatic rod 7 has a telescopic rod 9, the end of the telescopic rod 9 is fixed to the bottom plate 12, when the trigger switch 81 is pressed, the pneumatic rod 7 will be driven to extend the telescopic rod 9, so that the movable inner tube 20 can be displaced upward relative to the fixed outer tube 10 (as shown in fig. 6A and 6B).

Please refer to fig. 2 and fig. 3. Each rolling member 30 is rotatably disposed in the receiving groove 23 of the first outer surface 21 and the second outer surface 22, each rolling member 30 includes a rolling shaft 31 and two wheel bodies 32, and each wheel body 32 is a hollow cylindrical structure and rotatably sleeved on two opposite ends of the rolling shaft 31, i.e. the wheel body 32 is not fixedly connected to the rolling shaft 31.

Referring to fig. 2 and 5, the bushing 40 is sleeved in the movable inner tube 20 and is locked with the movable inner tube 20 by screws (not shown) and the positioning holes 24. The bushing 40 is a hollow square column structure formed by connecting four plates 41, each plate 41 is provided with two screw holes 42 and six openings 43, and the positions of the openings 43 correspond to the wheel body 32 one by one. As shown in fig. 6A, when the rolling members 30 are disposed in the accommodating grooves 23 and the movable inner tube 20 is sleeved in the fixed outer tube 10, the rolling shafts 31 abut against the portions 44 between the two openings 43 on the outer wall surface of the plate body 41 of the bushing 40, the wheel body 32 does not abut against the outer wall surface of the plate body 41, but the wheel body 32 partially protrudes from the first outer surface 21 or the second outer surface 22 and contacts the tube wall of the fixed outer tube 10.

It should be noted that, although the movable inner tube 20 and the bushing 40 are fixed by screws in the embodiment, four plate bodies 41 may be welded to the inner wall of the movable inner tube 20, respectively, so that the movable inner tube 20 and the bushing 40 can be stably integrated. In addition, in order to facilitate the assembly of the rolling member 30 between the movable inner tube 20 and the fixed outer tube 10, a layer of colloidal lubricating oil may be applied to the rolling member 30 in advance, and then the rolling member 30 is placed in the accommodating groove 23 (at this time, the bush 40 is fixed in the movable inner tube 20), so that the rolling member 30 may be attached to the accommodating groove 23 by the lubricating oil, and the rolling member 30 may be prevented from falling off from the movable inner tube 20 during the process of sleeving the movable inner tube 20 on the fixed outer tube 10.

In practical operation, when the movable inner tube 20 is not lifted (as shown in fig. 6A), the rolling member 30 is accommodated in the accommodating groove 23, the rolling shaft 31 abuts against the portion 44 of the outer wall surface of the bushing 40, and the wheel body 32 is accommodated in the opening 43 of the bushing 40, and the wheel body 32 contacts the inner wall of the fixed outer tube 10 in a substantially point contact manner. When a user presses the trigger switch 81 to adjust the height of the foot, the pneumatic rod 7 is driven to extend the telescopic rod 9 (as shown in fig. 6B), so that the movable inner tube 20 moves along the height direction H to raise the height of the table foot 1. During the moving process of the movable inner tube 20, the wheel body 32 or the rolling shaft 31 of the rolling member 30 will be rolled (or both will be rolled synchronously), thereby greatly reducing the friction between the movable inner tube 20 and the fixed outer tube 10, and effectively reducing the possibility of surface abrasion and noise generation.

The above description is only an embodiment of the present invention, and all equivalent changes and modifications made in the specification and claims of the present invention should be included in the protection scope of the present invention.

Claims

1. A height-adjustable table leg, comprising:

a fixed outer tube;

a movable inner tube in the form of a hollow square column having two first outer surfaces parallel to each other and two second outer surfaces parallel to each other, the movable inner tube having a height direction along which the movable inner tube is displaceably fitted over the fixed outer tube;

a plurality of rolling members which are arranged on the two first outer surfaces or the two second outer surfaces in an in-situ rolling manner, wherein each rolling member partially protrudes out of the two first outer surfaces or the two second outer surfaces and contacts the pipe wall of the fixed outer pipe, so that each rolling member can roll when the movable inner pipe is displaced along the height direction;

each rolling piece comprises a rolling shaft and two wheel bodies, and the two wheel bodies are sleeved at two opposite ends of the rolling shaft;

each rolling piece is arranged on the two first outer surfaces and the two second outer surfaces in a manner of rolling in situ;

the rolling device comprises a movable inner pipe, a lining, a first outer surface and a second outer surface, wherein the lining is a hollow square column and is sleeved in the movable inner pipe, at least one accommodating groove is formed in each first outer surface and each second outer surface, the configuration of each accommodating groove is the same as that of the section of each rolling piece, and each rolling piece is arranged in each accommodating groove in a one-to-one correspondence mode and is abutted against the outer wall surface of the lining;

2. A height adjustable foot as claimed in claim 1, wherein: the two wheel bodies are rotatably sleeved at two opposite ends of the rolling shaft.

3. A height adjustable foot as claimed in claim 1, wherein: each rolling element is a ball or a cylindrical roller.

4. A height adjustable foot as claimed in claim 1, wherein: the air pressure rod is provided with a telescopic rod, the fixed outer tube is provided with a bottom plate, the air pressure rod is arranged in the movable inner tube, and the tail end of the telescopic rod is connected with the bottom plate.

5. A height adjustable foot as claimed in claim 1, wherein: the rolling device comprises a movable inner tube, a plurality of rolling pieces and a plurality of first outer surfaces, wherein the movable inner tube is fixedly connected with the inner wall of the movable inner tube, the first outer surfaces and the second outer surfaces are respectively provided with at least one containing groove, the configuration of each containing groove is the same as that of the section of each rolling piece, and each rolling piece is correspondingly arranged in each containing groove one by one and is abutted against one of the four plate bodies.