Lifting column and furniture using same

Abstract

The utility model relates to the technical field of furniture, in particular to a lifting column and furniture applying the lifting column, which comprises an outer tube, an inner tube and an auxiliary lifting rod, the outer tube is sleeved on the inner tube in a sliding manner, part of the auxiliary lifting rod is arranged in the inner tube, two ends of the auxiliary lifting rod are respectively connected onto the outer tube and the inner tube, and any surface of the inner tube and the outer tube is provided with a roller. And the rollers are correspondingly arranged in the slideways in a rolling manner, so that the problem of poor practicability of the upright post of the existing furniture is solved.

Description

Technical Field

[0001] This utility model relates to the field of furniture technology, and in particular to a lifting column and furniture using the lifting column. Background Technology

[0002] Furniture, such as common stools, tables, and sofas, mainly consists of a tabletop and supporting columns. Most existing columns are one-piece structures, which cannot be adjusted in height as needed. Consequently, the height of the furniture cannot be adjusted, resulting in poor practicality. Utility Model Content

[0003] In order to solve the above-mentioned technical problems, the purpose of this utility model is to provide a lifting column, which solves the problem of poor practicality of existing furniture columns.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a lifting column, including an outer tube, an inner tube and an auxiliary lifting rod, the outer tube is slidably sleeved on the inner tube, a portion of the auxiliary lifting rod is located inside the inner tube, and its two ends are respectively connected to the outer tube and the inner tube, a roller is provided on either the inner tube or the outer tube, and a slide is provided on the other surface along the sliding direction of the two, and the roller is correspondingly rolled in the slide.

[0005] Furthermore, the outer tube has an internal cavity with a polygonal prism structure, and the shape of the inner tube is adapted to the shape of the cavity.

[0006] By adopting the above technical solution, the polygonal prism cavity of the outer tube matches the shape of the inner tube, preventing the inner tube from rotating during the lifting and lowering process and ensuring the stability of the movement direction.

[0007] Furthermore, the cavity is a quadrangular prism structure, and the inner wall of the cavity has at least one first plane along its axial direction. The outer side of the inner tube has a corresponding second plane that is parallel to the first plane. The roller is correspondingly located on the second plane, and the slide is arranged along the first plane.

[0008] By adopting the above technical solution, the first plane of the quadrangular prism cavity and the second plane of the inner tube form a linear contact, further constraining the sliding direction of the inner and outer tubes, avoiding lateral deviation, and improving the lifting accuracy of the lifting column. The roller is set on the second plane of the inner tube, and the slide is set on the first plane of the outer tube. The "point contact" guidance is achieved through rolling friction, reducing frictional resistance, while ensuring the precise constraint of the slide on the roller.

[0009] Furthermore, there are four first planes, each located at a corner of the cavity.

[0010] By adopting the above technical solution, the four first planes are located at the quadrilateral corners of the cavity cross section, forming four-point guiding constraints, further limiting the radial displacement of the inner and outer tubes, and ensuring the straightness of the lifting trajectory.

[0011] Furthermore, the slide is a groove formed on the first plane, and the roller is correspondingly rolled within the groove.

[0012] By adopting the above technical solution, the groove structure physically limits the roller, preventing it from falling off the slide and avoiding jamming or abnormal noise caused by roller deviation; the roller rolls in the groove, which can reduce the entry of external dust or impurities into the slide, extend the cleaning cycle of the slide and roller, and make maintenance more convenient.

[0013] Furthermore, the lower end of the auxiliary lifting rod is connected to the bottom of the inner tube, and the upper end of the auxiliary lifting rod extends into the interior of the outer tube and is hinged to the top of the outer tube.

[0014] By adopting the above technical solution and the articulated design, the auxiliary lifting rod can be finely adjusted in angle with the outer tube during the lifting process, balancing the displacement difference between the inner and outer tubes, avoiding jamming or deformation caused by rigid connection, as well as wear during relative expansion and contraction between the inner and outer tubes.

[0015] Furthermore, a connecting plate is provided at the top of the outer tube, and one end of the auxiliary lifting rod is hinged to the connecting plate.

[0016] By adopting the above technical solution, the connecting plate at the top of the outer tube serves as a hinge point, which can provide a stable support point and avoid stress concentration caused by direct contact between the hinge point and the outer tube, thereby effectively extending the service life of the outer tube.

[0017] Furthermore, an operating opening is provided at the hinge point between the outer tube and the auxiliary lifting rod.

[0018] By adopting the above technical solution, the design of the operating opening makes it easy for users to directly access the hinge point and auxiliary lifting rod, simplifying the process of lubrication, adjustment or replacement of parts.

[0019] A piece of furniture includes a tabletop and a lifting column as described above, the lifting column being mounted on the tabletop.

[0020] Compared with the prior art, the advantages of this utility model are:

[0021] 1. This utility model uses an auxiliary lifting rod to support or retract the inner and outer tubes, thereby adjusting the height of the entire lifting column to adjust the height of corresponding furniture, making it more practical. The rolling cooperation of the rollers and the slide replaces the traditional sliding friction, significantly reducing resistance and improving the smoothness of lifting. At the same time, the slide is set along the sliding direction to ensure that the inner and outer tubes slide along a straight trajectory, reducing the risk of deviation during sliding and making the lifting column more stable during sliding. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the lifting column structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the outer tube and inner tube structure of this utility model.

[0024] Figure 3 This is a schematic diagram of the lifting column structure of this utility model.

[0025] Figure 4 This is a schematic diagram of the structure of the height-adjustable table of this utility model.

[0026] Figure 5 This is a three-dimensional structural diagram of the height-adjustable table of this utility model.

[0027] In the picture:

[0028] 100 Lifting column, 110 Outer tube, 111 Connecting plate, 1111 Mounting ear, 1112 Rotating shaft, 112 First plane, 113 Slide rail, 114 Operating opening;

[0029] 120 Inner tube, 121 Second plane, 122 Roller;

[0030] 130 auxiliary lifting rod;

[0031] 200 for desktop, 210 for base. Detailed Implementation

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0033] Reference Figure 1 The lifting column 100 is commonly used in furniture such as tables, stools, and sofas. It includes an outer tube 110, an inner tube 120, and an auxiliary lifting rod 130. The outer tube 110 is slidably sleeved on the inner tube 120. Part of the auxiliary lifting rod 130 is located inside the inner tube 120, with its upper end extending out of the inner tube 120 and connecting to the inner top of the outer tube 110, and its lower end installed at the bottom of the inner tube 120. In this way, by extending and retracting the auxiliary lifting rod 130, the relative extension and retraction movement between the outer tube 110 and the inner tube 120 can be driven, realizing the free adjustment of the height of the lifting column 100. The inner tube 120 and the outer tube 110 are both equipped with rollers 122 on one surface and a slide rail 113 on the other surface, which is set along the sliding direction of the two. The rollers 122 are rolled in the slide rail 113. The advantage of this design is that the rolling cooperation between the rollers 122 and the slide rail 113 replaces the traditional sliding friction, which significantly reduces resistance and improves the smoothness of lifting. At the same time, the slide rail 113 is set along the sliding direction to ensure that the inner tube 120 and the outer tube 110 slide along a straight trajectory, reducing the risk of deviation during sliding and making the lifting column 100 more stable during sliding.

[0034] Reference Figure 2 In order to further limit the movement direction of the outer tube 110 and the inner tube 120 to their axial direction, preferably, the cavity inside the outer tube 110 is a polygonal prism structure, and the shape of the inner tube 120 is adapted to the cavity. By utilizing the non-circular cross-section of both, circumferential rotation can be avoided when they are linearly extended and contracted.

[0035] Reference Figure 2 Furthermore, the cavity is a quadrangular prism structure, and the inner wall of the cavity has at least one first plane 112 along its axial direction. The outer side of the inner tube 120 is provided with a second plane 121 that is parallel to the first plane 112. The roller 122 is correspondingly provided on the second plane 121, and the slide rail 113 is correspondingly provided on the first plane 112. The advantage of this is that the first plane 112 of the quadrangular prism cavity and the second plane 121 of the inner tube 120 form a linear contact, which further constrains the sliding direction of the inner and outer tubes 110, avoids lateral deviation, and improves the lifting accuracy of the lifting column 100. The roller 122 is provided on the second plane 121 of the inner tube 120, and the slide rail 113 is provided on the first plane 112 of the outer tube 110. The "point contact" guidance is achieved through rolling friction, which reduces frictional resistance and ensures the precise constraint of the slide rail 113 on the roller 122.

[0036] In this embodiment, refer to Figure 2 and 3 The rollers 122 can be set only locally along the axial length of the second plane 121, without having to lay the rollers 122 at intervals along the entire length of the inner tube 120. This is because there is a mutual constraint between the first plane 112 and the second plane 121 between the inner tube 120 and the outer tube 110. Therefore, by setting only one or two rollers 122 on the second plane 121, stable axial smooth transmission between the outer tube 110 and the inner tube 120 can be achieved, effectively saving the cost of using the rollers 122.

[0037] Furthermore, the first plane 112 is provided with four lines, and the four first planes 112 are respectively located at the corners of the cavity. The advantage of this design is that by using four-point guiding constraints, the radial displacement of the inner and outer tubes 110 can be further restricted, ensuring the straightness of the lifting trajectory.

[0038] Reference Figure 2 and 3To further improve the stability of the linear extension column, the slide 113 is a groove formed on the first plane 112, and the roller 122 is rolled in the groove. In this way, the groove structure physically limits the roller 122, preventing it from falling off the slide 113 and avoiding jamming or abnormal noise caused by the roller 122 deviating. At the same time, the roller 122 rolling in the groove can reduce the entry of external dust or impurities into the slide 113, extend the cleaning cycle of the slide 113 and the roller 122, and make maintenance more convenient.

[0039] To prevent increased wear on the outer tube 110 and inner tube 120 due to gaps between them during relative extension and retraction, and to avoid jamming during extension and retraction, in this embodiment, the upper end of the auxiliary lifting rod 130 extends into the interior of the outer tube 110 and is hinged to the top of the outer tube 110. This hinged design allows the auxiliary lifting rod 130 to finely adjust the angle between itself and the outer tube 110 during the lifting and retraction process, balancing the displacement difference between the inner and outer tubes 110, avoiding jamming or deformation caused by rigid connection, and preventing wear during relative extension and retraction between the inner and outer tubes 110.

[0040] Reference Figure 3 The top end of the outer tube 110 is provided with a connecting plate 111, and the upper end of the auxiliary lifting rod 130 is correspondingly hinged to the connecting plate 111. In this way, the connecting plate 111 at the top end of the outer tube 110 is used as the hinge point, which can provide a stable fulcrum and avoid stress concentration caused by direct contact between the hinge point and the outer tube 110, thereby effectively extending the service life of the outer tube 110.

[0041] In this embodiment, as a hinged connection method between the auxiliary lifting rod 130 and the connecting plate 111, refer to... Figure 3 The bottom of the connecting plate 111 is provided with two mounting ears 1111, and the upper end of the auxiliary lifting rod 130 is correspondingly located in the mounting ears 1111. The two are connected by a rotating shaft 1112 so that they can rotate relative to each other.

[0042] It is conceivable that there are many other ways to hinge the two together, such as using a ball joint to allow rotation, using a ball bearing, or adding a universal joint. These hinge methods will not be elaborated on here.

[0043] Furthermore, refer to Figure 5 In order to facilitate operation and maintenance of the hinge joint between the auxiliary lifting rod 130 and the connecting plate 111, an operation opening 114 is provided at the corresponding position of the outer tube 110. This allows for convenient maintenance or disassembly of the hinge joint, further improving the ease and convenience of product maintenance.

[0044] In this embodiment, there are many types of furniture, such as tables, chairs, stools, and sofas. This embodiment only uses a table as an example, referring to... Figure 4 and 5 The table can be a single-legged table, a double-legged table, a triangular table, or a table with more legs. Taking a double-legged table as an example, the upper end of the two lifting columns 110 is provided with a tabletop 200, and the bottom of the two lifting columns 100 is provided with a base 210. The base 210 can further improve the stability of the table.

[0045] Although the preferred embodiments of the present invention have been described in detail above, it should be clearly understood that various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A lifting column, comprising an outer tube, an inner tube, and an auxiliary lifting rod, characterized in that, The outer tube is slidably sleeved on the inner tube, and part of the auxiliary lifting rod is located inside the inner tube. Its two ends are respectively connected to the outer tube and the inner tube. A roller is provided on one surface of the inner tube and the outer tube, and a slide rail is provided on the other surface along the sliding direction of the two. The roller is correspondingly rolled in the slide rail.

2. A rising bollard according to claim 1, characterized in that, The outer tube has an internal cavity, which is a polygonal prism structure, and the shape of the inner tube is adapted to the shape of the cavity.

3. A rising column according to claim 2, characterized in that, The cavity is a quadrangular prism structure, and the inner wall of the cavity has at least one first plane along its axial direction. The outer side of the inner tube has a second plane that is parallel to the first plane. The roller is correspondingly disposed on the second plane, and the slide is disposed along the first plane.

4. A rising bollard according to claim 3, characterized in that, The first plane has four sections, and the four first planes are respectively located at the corners of the cavity.

5. A rising column according to claim 3, characterized in that, The slide is a groove formed on the first plane, and the roller is correspondingly rolled within the groove.

6. A rising bollard according to claim 1, characterized in that, The lower end of the auxiliary lifting rod is connected to the bottom of the inner tube, and the upper end of the auxiliary lifting rod extends into the interior of the outer tube and is hinged to the top of the outer tube.

7. A rising bollard according to claim 6, characterized in that, The top end of the outer tube is provided with a connecting plate, and one end of the auxiliary lifting rod is correspondingly hinged to the connecting plate.

8. A rising bollard according to claim 6, characterized in that, The outer tube has an operating opening at the hinge point between the auxiliary lifting rod and the outer tube.

9. A type of furniture, characterized in that, Includes a desktop and a lifting column as claimed in any one of claims 1-8, wherein the lifting column is mounted on the desktop.

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