Supporting leg with adjustable height

Abstract

The utility model discloses a height-adjustable supporting leg which comprises a stand column, an adjusting leg is slidably mounted in the stand column, a gear structure is rotatably mounted in the stand column, a rack structure meshed with the gear structure is arranged on the adjusting leg, and the gear structure is matched with the rack structure to drive the adjusting leg to ascend and descend. A rotation stopping piece for limiting one-way rotation of the gear structure is further installed in the stand column, one end of the rotation stopping piece is movably connected with the stand column, and the other end of the rotation stopping piece is connected with the gear structure so as to limit lowering of the adjusting foot relative to the stand column. The supporting leg applies force to the gear structure of the transmission part to drive the adjusting leg to ascend and descend so as to achieve height adjustment, the rotation stopping part is additionally arranged to limit the gear structure to only rotate in one direction, the height of the adjusting leg is prevented from being reduced, the structure is simple, and use is reliable.

Description

Technical Field

[0001] The present application relates to the field of furniture technology, and more specifically to a height-adjustable support leg. Background Art

[0002] Tables, chairs, sofas, and other furniture are essential for daily life, work, and leisure. These pieces of furniture are all equipped with legs to ensure stable and secure placement. However, once the legs are installed, the furniture is used as a whole and remains fixed, making it difficult to adjust the height according to the user's needs. This is especially true for sofas, where the legs are often welded to the sofa, making them fixed to the legs and difficult to adjust. To address the aforementioned issues, utility model patent publication number CN209629186U discloses a structure comprising a support leg and a column, wherein the support leg comprises a support portion and a support screw vertically disposed on the support portion. The column is provided with a first internally threaded structure that cooperates with the support screw. The column is provided with a movable protective cover that can slide downward and enclose the support leg. The column is fixed to the sofa. During installation, the height of the sofa leg can be adjusted by rotating the support leg, causing the support screw and the first internally threaded structure to rotate relative to each other, thereby adjusting the extension length of the support screw. By adjusting the height of each sofa leg in this manner, the sofa can be adjusted to the desired level. However, the threads do not self-lock after being adjusted. After being raised, the raised legs are easily rotated due to dragging, friction, or collisions during the movement of the sofa, resulting in the need for readjustment. Therefore, there is still a need for a furniture leg that can lock the height. Summary of the Invention

[0003] The technical problem to be solved by this application is to provide a height-adjustable support foot, which achieves height adjustment by applying force to the gear structure to drive the adjustment foot to rise and fall, and by adding a stopper to limit the gear structure to only one-way rotation, thereby preventing the adjustment foot from lowering the height. The structure is simple and reliable to use.

[0004] The present application provides a height-adjustable support leg, including a column, an adjustment foot slidingly installed in the column, a gear structure rotatably installed in the column, the adjustment foot is provided with a rack structure meshing with the gear structure, the gear structure and the rack structure cooperate to drive the adjustment foot to rise and fall, and a stopper for limiting the one-way rotation of the gear structure is also installed in the column, one end of the stopper is movably connected to the column, and the other end of the stopper is connected to the gear structure to limit the lowering of the adjustment foot relative to the column. In this technical solution, an adjusting foot is provided to be slidably installed in the column, and the adjusting foot can be raised and lowered relative to the column by sliding to achieve height adjustment. A gear structure is provided to be rotatably installed in the column, and the gear structure is connected to the adjusting foot through a rack structure. The gear structure is rotated by applying force to the gear structure, and the rotation of the gear structure drives the adjusting foot to rise and fall through the rack structure. The transmission is simple and reliable, and the gear structure and the rack structure have a certain self-locking ability. The gear structure and the rack structure can maintain balance without being affected by other forces, thereby making the height adjustment of the adjusting foot more accurate and reliable. By movably installing a stopper in the column, the stopper is connected to the gear structure to limit the one-way rotation of the gear structure, so that the gear structure can only rotate in the direction of driving the adjusting foot to rise. Due to the limiting effect of the stopper, the adjusting foot cannot be lowered relative to the column, thereby achieving height locking. The overall structure is simple, the transmission is efficient, and the adjustment is reliable.

[0005] As an improvement, the anti-rotation member is movably connected to the gear structure, and the gear structure is movably disengaged from the anti-rotation member so that the gear structure can rotate in both directions. In this technical solution, the anti-rotation member is movably connected to or disengaged from the gear structure. The gear structure is connected to the anti-rotation member to lock the gear structure in one direction, thereby achieving height locking. By applying force to the gear structure, the gear structure is moved and disengaged from the anti-rotation member to release the unidirectional rotation lock of the gear structure, and the gear structure can rotate in both directions, thereby making the lifting height of the adjustment foot adjustable and adapting to more usage requirements.

[0006] As an improvement, the column is provided with an operating unit for driving the movement of the gear structure. In this technical solution, the gear structure drives the adjustment foot to rise and fall by rotating, and the gear structure moves forward and backward to connect or disengage the anti-rotation member. By providing an operating unit capable of driving the movement of the gear structure on the column, the operating unit can drive the gear structure to rotate and move, allowing the user to directly achieve the lifting and lowering function of the support foot through the external operating unit, without having to lift the sofa or table and chair to operate, making it more labor-saving and convenient to use.

[0007] As an improvement, the operating portion is an open structure, and a driver is detachably mounted on the operating portion. The driver passes through the operating portion and connects to the gear structure to drive the gear structure to move. In this technical solution, the operating portion is set as an open structure with an external driver. The operating portion structure is simple and reliable. The driver includes but is not limited to a screwdriver, wrench, etc. The driver is connected to the gear structure through the operating portion. The user can use the driver to move the gear structure, which is more labor-saving.

[0008] As an improvement, a mounting seat movably connected to the gear structure is provided within the column. The gear structure is subjected to force and can move forward and backward relative to the mounting seat. The gear structure connects to or disengages from the anti-rotation member by moving forward and backward. In this technical solution, by providing a mounting seat within the column to mount the gear structure, the gear structure is confined within the column, and the mounting structure is simple and reliable. By providing a movably connected gear structure and the mounting seat, the gear structure is subjected to force and can move forward and backward through the mounting seat, thereby enabling the gear structure to switch between connection and disengagement from the anti-rotation member, and the movement of the gear structure is more reliable.

[0009] As an improvement, the mounting seat is rotated and limitedly installed in the column, the gear structure is sleeved with the mounting seat, and a first reset elastic member is provided between the gear structure and the mounting seat. In this technical solution, the gear structure is able to move back and forth relative to the mounting seat by sleeved with the mounting seat, and the first reset elastic member is installed between the gear structure and the mounting seat, so that the gear structure can be reset by the first reset elastic member. The gear structure remains connected to the anti-rotation member under the action of the first reset elastic member, and the gear structure can be compressed toward the mounting seat by pressing the gear structure. The gear structure is disengaged from the anti-rotation member so that it can rotate in both directions. The gear structure can be reset under the action of the first reset elastic member by loosening the gear structure. The gear structure is connected to the anti-rotation member to lock the gear structure in one direction. The structural design is ingenious and reliable in use. On the other hand, the driving member can be connected to the gear structure through the operating part. The user can press the gear structure through the driving member to disengage the gear structure from the anti-rotation member, which is convenient and labor-saving to use.

[0010] As an improvement, the gear structure is provided with a first mounting groove for sleeved engagement with the mounting seat, a limiting protrusion is provided on the outer periphery of the mounting seat, and a buckle is provided on the inner wall of the first mounting groove that matches the limiting protrusion. The buckle is connected to the limiting protrusion to limit the mounting seat. In this technical solution, the gear structure is movably connected to the mounting seat by providing the first mounting groove, and the limiting protrusion is provided on the mounting seat. The limiting protrusion is annular, and the buckle is provided on the inner wall of the first mounting groove. The buckle cooperates with the limiting protrusion to limit the mounting seat within the first mounting groove, preventing the gear structure from separating from the mounting seat and improving structural reliability.

[0011] As an improvement, the stopper is rotatably connected to the inner wall of the column, the stopper is provided with a limiting portion, the inner wall of the column is provided with a first stopper adapted to the limiting portion, and the stopper abuts against the first stopper through the limiting portion to limit the angle of unidirectional rotation of the stopper. In this technical solution, the stopper is rotatable by setting the stopper on the inner wall of the column, and the stopper abuts against the first stopper through the limiting portion to limit the reverse rotation of the stopper. When the gear structure is connected to the stopper, when the gear structure rotates in the direction of driving the adjustment foot to rise, the stopper is rotated to the side away from the limiting portion by the gear structure, so that the stopper avoids the rotation of the gear structure, and the rotation of the gear structure is not restricted. When the gear structure rotates in the direction of driving the adjustment foot to descend, the stopper abuts against the first stopper through the limiting portion to limit the rotation of the gear structure, so that the gear structure cannot drive the adjustment foot to descend. The stopper structure is simple and reliable.

[0012] As an improvement, the anti-rotation member is connected to a second resetting elastic member, and the limiting portion is kept in contact with the first stop block under the action of the second resetting elastic member. In this technical solution, by providing the anti-rotation member connected to the second resetting elastic member, the second resetting elastic member is preferably a torsion spring. The anti-rotation member can not only be rotated and reset by the second resetting elastic member, but also the anti-rotation member can keep the limiting portion in contact with the first stop block by the second resetting elastic member when the anti-rotation member is not subjected to the force of the gear structure, thereby improving the reliability of use.

[0013] As an improvement, the adjustment foot is provided with a first support rod and a second support rod, the rack structure is provided on the first support rod, the anti-rotation member is installed on the inner wall of the column on the side close to the second support rod, and the gear structure is installed between the first support rod and the second support rod. In this technical solution, the adjustment foot is provided with a rack structure through the first support rod, and the anti-rotation member is installed close to the second support rod, so that the rack structure and the anti-rotation member are distributed on both sides of the gear structure. Not only is the transmission efficient and reliable, but the installation distribution of the parts is reasonable, which saves more space and is conducive to reducing the overall size. On the other hand, the width of the joint part between the rack structure and the gear structure is set to be greater than the width of the joint part between the anti-rotation member and the gear structure, so that the gear structure always remains engaged with the rack structure during the forward and backward movement, and the structural design is ingenious and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of a height-adjustable support leg of the present application.

[0015] Figure 2 An exploded view of a height-adjustable foot for this application.

[0016] Figure 3 This is a partial structural diagram of a height-adjustable support leg of the present application.

[0017] Figure 4 This is an exploded view of the gear structure, the first reset elastic member and the mounting seat in this application.

[0018] Figure 5 This is a schematic diagram of the three-dimensional structure of the inner sleeve and the anti-rotation member in this application.

[0019] Figure 6 A perspective view of a height-adjustable foot for this application.

[0020] Figure 7 For this application Figure 6 A local enlarged schematic diagram of point A in the middle.

[0021] As shown in the figure: 1. Column; 11. Operating part; 12. Inner sleeve; 121. Through hole; 13. First stopper; 14. Second stopper; 2. Adjusting foot; 21. Rack structure; 22. First support rod; 23. Second support rod; 3. Gear structure; 31. First mounting groove; 32. Buckle; 33. Hexagonal socket; 4. Anti-rotation part; 41. Limiting part; 5. Mounting seat; 51. Limiting protrusion; 6. First reset elastic part; 7. Second reset elastic part. DETAILED DESCRIPTION

[0022] In order to better understand the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that these detailed descriptions are merely descriptions of exemplary embodiments of the present application and are not intended to limit the scope of the present application in any way. Throughout the specification, the same reference numerals refer to the same elements.

[0023] In the drawings, the thickness, size and shape of objects have been slightly exaggerated for ease of explanation. The drawings are only examples and are not drawn strictly to scale.

[0024] It should also be understood that the terms "comprising," "including," "having," "containing," and "including," when used in this specification, indicate the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or combinations thereof. The terms "first," "second," and the like are primarily used to distinguish between different devices, elements, or components (the specific types and configurations of which may be the same or different), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0025] In addition, it should be noted that the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements, or components; it can be directly set on another component or another intermediate component may exist at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the invention. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0026] like Figures 1 to 7 As shown, the present application discloses a height-adjustable support leg, including a column 1, an adjusting foot 2 is slidably installed in the column 1, a gear structure 3 is rotatably installed in the column 1, a rack structure 21 is provided on the adjusting foot 2 that meshes with the gear structure 3, the gear structure 3 cooperates with the rack structure 21 to drive the adjusting foot 2 to rise and fall, the adjusting foot 2 is slidably installed in the column 1, the adjusting foot 2 can be raised and lowered relative to the column 1 by sliding, thereby achieving height adjustment, a gear structure 3 is rotatably installed in the column 1, the gear structure 3 and the adjusting foot 2 are connected by transmission through the gear structure 3 and the rack structure 21, the gear structure 3 is rotated by applying force to the gear structure 3, and the gear structure 3 rotates to drive the adjusting foot 2 to rise and fall through the rack structure 21, the gear structure 3 and the rack structure 21 have a certain self-locking ability, and the gear structure 3 and the rack structure 21 have a certain self-locking ability. The structure 21 can maintain balance without being affected by other forces, so that the height adjustment of the adjusting foot 2 is more accurate and reliable. The gear structure 3 drives the adjusting foot 2 to rise and fall by rotating, and the transmission is simple and reliable. A stopper 4 is also installed in the column 1 to limit the unidirectional rotation of the gear structure 3. One end of the stopper 4 is movably connected to the column 1, and the other end of the stopper 4 is connected to the gear structure 3 to limit the lowering of the adjusting foot 2 relative to the column 1. By movably installing the stopper 4 in the column 1 and connecting the other end of the stopper 4 to the gear structure 3, the unidirectional rotation of the gear structure 3 can be limited, so that the gear structure 3 can only rotate in the direction of driving the adjusting foot 2 to rise. Due to the limiting effect of the stopper 4, the adjusting foot 2 cannot be lowered relative to the column 1, thereby achieving height locking. The overall structure is simple, the transmission is efficient, and the adjustment is reliable.

[0027] More specifically, Figure 3As shown, the stopper 4 is movably connected to the gear structure 3, and the gear structure 3 is movably disengaged from the stopper 4 so that the gear structure 3 can rotate in both directions. The stopper 4 is set to be movably connected or disengaged from the gear structure 3. The gear structure 3 is connected to the stopper 4 to lock the gear structure 3 in one direction, thereby achieving height locking. By applying force to the gear structure 3, the gear structure 3 is movably disengaged from the stopper 4 to release the one-way rotation lock of the gear structure 3. The gear structure 3 can rotate in both directions, so that the lifting height of the adjustment foot 2 can be adjusted to meet more usage requirements.

[0028] More specifically, Figure 1 and Figure 2 As shown, the column 1 is provided with an operating part 11 for driving the gear structure 3 to move. The gear structure 3 drives the adjustment foot 2 to rise and fall by rotating. The gear structure 3 connects to or disengages from the anti-rotation part 4 by moving back and forth. By providing an operating part 11 that can drive the gear structure 3 to move on the column 1, the gear structure 3 can be driven to rotate and move through the operating part 11. The user can directly realize the lifting function of the support leg through the external operating part 11. When in use, there is no need to lift the sofa or table and chair to operate, which is more labor-saving and convenient to use.

[0029] More specifically, Figure 1 and Figure 2 As shown, the operating part 11 is an open structure, and a driving member is detachably installed on the operating part 11. The driving member passes through the operating part 11 and is connected to the gear structure 3 to drive the gear structure 3 to move. The operating part 11 is set as an open structure with an external driving member. The structure of the operating part 11 is simple and reliable. The driving member includes but is not limited to a screwdriver, a wrench, etc. The driving member is connected to the gear structure 3 through the operating part 11. The user can move the gear structure 3 through the driving member, which is more labor-saving to use.

[0030] More specifically, Figure 3 and Figure 4 As shown, a mounting seat 5 movably connected to the gear structure 3 is provided in the column 1. The gear structure 3 can move forward and backward relative to the mounting seat 5 under force. The gear structure 3 connects to or disengages from the anti-rotation member 4 by moving forward and backward. By providing the mounting seat 5 in the column 1 to install the gear structure 3, the gear structure 3 is limited in the column 1. The installation structure is simple and reliable. By providing the gear structure 3 and the mounting seat 5 movably connected, the gear structure 3 is subjected to force through the mounting seat 5 to achieve forward and backward movement, so that the gear structure 3 can switch the connection or disengagement from the anti-rotation member 4, and the movement of the gear structure 3 is more reliable.

[0031] More specifically, Figure 3 and Figure 4As shown, the mounting seat 5 is rotated and limitedly installed in the column 1, the gear structure 3 is sleeved with the mounting seat 5, and a first reset elastic member 6 is provided between the gear structure 3 and the mounting seat 5. The gear structure 3 is able to move back and forth relative to the mounting seat 5 by sleeve-engaging the mounting seat 5. By installing the first reset elastic member 6 between the gear structure 3 and the mounting seat 5, the gear structure 3 can be movably reset by the first reset elastic member 6. The gear structure 3 remains connected to the anti-rotation member 4 under the action of the first reset elastic member 6, and the gear structure 3 can be compressed toward the mounting seat 5 by pressing the gear structure 3. The first reset elastic member 6, the gear structure 3 is disengaged from the anti-rotation member 4 so as to be able to rotate in both directions. By loosening the gear structure 3, the gear structure 3 can be reset under the action of the first reset elastic member 6. The gear structure 3 is connected to the anti-rotation member 4 to be locked for one-way rotation. The structural design is ingenious and reliable to use. On the other hand, the driving member can be connected to the gear structure 3 through the operating part 11. The user can press the gear structure 3 through the driving member to disengage the gear structure 3 from the anti-rotation member 4, which is convenient and labor-saving to use. In this solution, the first reset elastic member 6 is a spring, and the spring structure is simple and the cost is low.

[0032] More specifically, Figure 3 and Figure 4 As shown, the gear structure 3 is provided with a first mounting groove 31 for socketing the mounting seat 5, a limiting protrusion 51 is provided on the outer periphery of the mounting seat 5, and a buckle 32 adapted to the limiting protrusion 51 is provided on the inner wall of the first mounting groove 31. The buckle 32 is connected to the limiting protrusion 51 to limit the mounting seat 5. The gear structure 3 is movably connected to the mounting seat 5 by setting the first mounting groove 31. The limiting protrusion 51 is provided on the mounting seat 5, and the limiting protrusion 51 is annular. The buckle 32 is provided on the inner wall of the first mounting groove 31. The buckle 32 cooperates with the limiting protrusion 51 to limit the mounting seat 5 in the first mounting groove 31, thereby preventing the gear structure 3 from being separated from the mounting seat 5 and improving the structural reliability.

[0033] More specifically, Figure 3 、 Figures 5 to 7As shown, the stopper 4 is rotatably connected to the inner wall of the column 1, the stopper 4 is provided with a limiting portion 41, and the inner wall of the column 1 is provided with a first stopper 13 adapted to the limiting portion 41. The stopper 4 abuts against the first stopper 13 through the limiting portion 41 to limit the angle of unidirectional rotation of the stopper 4. By arranging the stopper 4 to be rotatable on the inner wall of the column 1, and the stopper 4 abuts against the first stopper 13 through the limiting portion 41 to limit the reverse rotation of the stopper 4, when the gear structure 3 is connected to the stopper 4, When the gear structure 3 rotates in the direction of driving the adjusting foot 2 to rise, the stopper 4 is acted upon by the gear structure 3 to rotate toward the side away from the limiting portion 41, so that the stopper 4 avoids the rotation of the gear structure 3, and the rotation of the gear structure 3 is not restricted. When the gear structure 3 rotates in the direction of driving the adjusting foot 2 to descend, the stopper 4 abuts against the first stop block 13 through the limiting portion 41 to limit the rotation of the gear structure 3, so that the gear structure 3 cannot drive the adjusting foot 2 to descend. The structure of the stopper 4 is simple and reliable.

[0034] More specifically, Figures 5 to 7 As shown, the stop member 4 is connected to a second reset elastic member 7, and the limiting portion 41 remains in contact with the first stop block 13 under the action of the second reset elastic member 7. The second reset elastic member 7 is connected by setting the stop member 4, and the second reset elastic member 7 is preferably a torsion spring. The stop member 4 can not only rotate and reset through the second reset elastic member 7, but also the stop member 4 can maintain the limiting portion 41 in contact with the first stop block 13 through the second reset elastic member 7 when it is not subjected to the force of the gear structure 3, so as to improve the reliability of use; the stop member 4 is fixed to the inner wall of the column 1 by bolts, and a second stop block 14 is also provided in the column 1 in the front and rear directions of the stop member 4. The second stop block 14 limits the front and rear positions of the stop member 4, and the second reset elastic member 7 is installed in the stop member 4, one end of the second reset elastic member 7 is connected to the second stop block 14, and the second reset elastic member 7 is reliably installed.

[0035] More specifically, Figure 3 and Figure 6 As shown, the adjusting foot 2 is provided with a first support rod 22 and a second support rod 23, the rack structure 21 is provided on the first support rod 22, the stopper 4 is installed on the inner wall of the column 1 on the side close to the second support rod 23, and the gear structure 3 is installed between the first support rod 22 and the second support rod 23. The adjusting foot 2 is provided with a rack structure 21 through the first support rod 22, and the stopper 4 is installed close to the second support rod 23, so that the rack structure 21 and the stopper 4 are distributed on both sides of the gear structure 3. Not only is the transmission efficient and reliable, but the installation distribution of components is reasonable, which saves more space and is conducive to reducing the overall size. On the other hand, the width of the joint part between the rack structure 21 and the gear structure 3 is set to be larger than the width of the joint part between the stopper 4 and the gear structure 3, so that the gear structure 3 always remains engaged with the rack structure 21 during the forward and backward movement, and the structural design is ingenious and reliable.

[0036] More specifically, Figure 2 and Figure 5 As shown, the column 1 is provided with an inner sleeve 12, which is sleeved with the adjusting foot 2, and the anti-rotation member 4, the mounting seat 5 and the gear structure 3 are all rotatably installed and limited in the inner sleeve 12. The inner sleeve 12 is provided with a through hole 121 adapted to the operating part 11, and the first stop block 13 and the second stop block 14 are both located in the inner sleeve 12; the driving member is a hexagonal screwdriver, and the rotation center of the gear structure 3 is provided with a hexagonal hole 33. The hexagonal screwdriver passes through the operating part 11 and the through hole 121 to connect the hexagonal hole 33, thereby being able to drive the gear structure 3 to move.

[0037] This application is not limited to the above-mentioned optimal implementation method. Anyone can derive various other forms of products based on the inspiration of this application. However, no matter what changes are made in their shape or structure, any technical solution that is the same or similar to that of this application falls within the scope of protection of this application.

Claims

1. A height-adjustable support leg, comprising a column (1), characterized in that: An adjusting foot (2) is slidably installed in the column (1), a gear structure (3) is rotatably installed in the column (1), a rack structure (21) meshing with the gear structure (3) is provided on the adjusting foot (2), the gear structure (3) cooperates with the rack structure (21) to drive the adjusting foot (2) to rise and fall, and a stopper (4) for limiting the unidirectional rotation of the gear structure (3) is also installed in the column (1), one end of the stopper (4) is movably connected to the column (1), and the other end of the stopper (4) is connected to the gear structure (3) to limit the lowering of the adjusting foot (2) relative to the column (1).

2. A height-adjustable support foot according to claim 1, characterized in that: The anti-rotation member (4) is movably connected to the gear structure (3), and the gear structure (3) is movably separated from the anti-rotation member (4) so ​​that the gear structure (3) can rotate in both directions.

3. The height-adjustable support leg according to claim 2, characterized in that: The column (1) is provided with an operating portion (11) for driving the gear structure (3) to move.

4. A height-adjustable support foot according to claim 3, characterized in that: The operating portion (11) is an open structure. A driving member is detachably mounted on the operating portion (11). The driving member passes through the operating portion (11) and is connected to the gear structure (3) to drive the gear structure (3) to move.

5. The height-adjustable support leg according to claim 3, characterized in that: The column (1) is provided with a mounting seat (5) movably connected to the gear structure (3). The gear structure (3) can move forward and backward relative to the mounting seat (5) when subjected to force. The gear structure (3) can connect to or disconnect from the anti-rotation member (4) by moving forward and backward.

6. The height-adjustable support leg according to claim 5, characterized in that: The mounting seat (5) is rotatably and positionally mounted in the column (1); the gear structure (3) is sleeved with the mounting seat (5); and a first resetting elastic member (6) is provided between the gear structure (3) and the mounting seat (5).

7. The height-adjustable support leg according to claim 6, characterized in that: The gear structure (3) is provided with a first mounting groove (31) for sleeve-engaging the mounting seat (5); a limiting protrusion (51) is provided on the outer periphery of the mounting seat (5); a buckle (32) adapted to the limiting protrusion (51) is provided on the inner wall of the first mounting groove (31); the buckle (32) is connected to the limiting protrusion (51) to limit the mounting seat (5).

8. The height-adjustable support leg according to claim 1, characterized in that: The stopper (4) is rotatably connected to the inner wall of the column (1), the stopper (4) is provided with a limiting portion (41), the inner wall of the column (1) is provided with a first stopper (13) adapted to the limiting portion (41), and the stopper (4) abuts against the first stopper (13) through the limiting portion (41) to limit the unidirectional rotation angle of the stopper (4).

9. The height-adjustable support leg according to claim 8, characterized in that: The anti-rotation member (4) is connected to a second resetting elastic member (7), and the limiting portion (41) is kept in contact with the first stopper (13) under the action of the second resetting elastic member (7).

10. The height-adjustable support leg according to claim 1, characterized in that: The adjusting foot (2) is provided with a first support rod (22) and a second support rod (23), the rack structure (21) is provided on the first support rod (22), the anti-rotation member (4) is installed on the inner wall of the column (1) on the side close to the second support rod (23), and the gear structure (3) is installed between the first support rod (22) and the second support rod (23).

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