Positioning structure of table and chair leg lifting adjusting assembly
The desk chair leg adjustment mechanism addresses accidental unlocking by requiring a deliberate two-step action, enhancing safety and stability through a locking pin and tab design.
Patent Information
- Application Number
- CN202422384527.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-28
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-09-28
AI Technical Summary
The existing table and chair lifting adjustment components have poor safety during use, which can easily cause the support legs inside the table and chair to slide due to accidentally touching the button, affecting the safety of use.
A positioning structure of the table and chair legs lifting adjustment component is designed. By setting a limit edge at the lower part of the limit plug, and the aperture of the adjustment hole is designed to be larger than the diameter of the limit plug, combined with the design of the button and adjustment lever, the unlocking process requires first lifting the support legs in the table and chairs upward and moving simultaneously to complete unlocking and enhance safety.
Improve the safety of the table and chair lifting adjustment components, prevent accidental sliding caused by accidental touch, and ensure the stability and safety of the use process.
Smart Images
Figure CN223095058U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of desks and chairs, and relates to a positioning structure of a lifting and adjusting assembly for table and chair legs. Background Art
[0002] In order to facilitate students' afternoon naps and convenient use, usually the table and chair legs of desks are provided with liftable ones. When an afternoon nap is needed, the table and chair legs can be lowered or raised to vacate the space for students to lie down and sleep conveniently.
[0003] The existing lifting and adjusting assembly for table and chair feet, such as the Chinese patent application [Authorization Publication No.: CN217851807U], discloses a lifting and adjusting structure for table and chair feet, a table and a chair, including an outer support leg of the table and chair and an inner support leg of the table and chair that is inserted on the outer support leg of the table and chair and moves up and down along the inner wall of the outer support leg of the table and chair and is connected to the tabletop or the chair seat. A plurality of adjusting holes are provided on the outer support leg of the table and chair, a limiting hole is provided on the lower part of the inner support leg of the table and chair, a lifting and adjusting lever with the middle part connected to the inner support leg of the table and chair is arranged in the inner support leg of the table and chair, the upper end of the lifting and adjusting lever is connected with a lifting and adjusting button that penetrates out of the inner support leg of the table and chair, the lower end of the lifting and adjusting lever is fixedly connected with an elastic member, when the inner support leg of the table and chair slides along the outer support leg of the table and chair until the limiting hole is directly opposite to any one of the adjusting holes, one end of the elastic member passes through the limiting hole and is inserted into the corresponding adjusting hole, the lifting and adjusting button can drive the lifting and adjusting lever to swing around the connection point to retract the elastic member and one end of the elastic member moves out of the adjusting hole, the elastic member is a U-shaped elastic sheet, one end of the U-shaped elastic sheet is connected to the outer side wall of the lifting and adjusting lever, and a limiting head that can be inserted into the adjusting hole is provided at one end of the U-shaped elastic sheet.
[0004] The above structure is positioned by inserting the limiting head of the U-shaped elastic sheet into the adjusting hole. During the process of students playing or walking around, it is easy to accidentally touch the button, which causes the inner support leg of the table and chair and the outer support leg of the table and chair to be unlocked, resulting in the inner support leg of the table and chair sliding down along the outer support leg of the table and chair due to gravity, affecting the safety of using the desks and chairs. Summary of the Utility Model
[0005] The purpose of the present utility model is to address the above problems existing in the prior art and propose a positioning structure for a lifting and adjusting assembly of table and chair legs. The technical problem to be solved by the present utility model is: how to solve the problem of poor adjustment safety of the existing lifting legs of desks and chairs.
[0006] The purpose of the present utility model can be achieved by the following technical solutions:
[0007] The lifting and lowering adjustment component of a table and chair leg comprises an outer support leg of the table and chair and an inner support leg of the table and chair inserted on the outer support leg of the table and chair and connected to the table board or the chair board. The inner support leg of the table and chair can slide up and down along the outer support leg of the table and chair, and a plurality of adjustment holes are provided on the outer support leg of the table and chair, and an adjusting lever is rotatably connected to the inner support leg of the table and chair, and the upper end of the adjusting lever is connected to a button that passes through the inner support leg of the table and chair. The positioning structure comprises an elastic member fixedly connected to the lower end of the adjusting lever, and one end of the elastic member has a columnar limiting plug, characterized in that the button is arranged toward the outer side of the table board or the chair board, the aperture of the adjusting hole is larger than the diameter of the limiting plug, and the lower part of the limiting plug has a limiting stop edge, and when the inner support leg of the table and chair slides along the outer support leg of the table and chair until the limiting plug is aligned with the corresponding adjusting hole, the elastic member pushes the limiting plug to pass through the adjusting hole, and the limiting stop edge can abut against the side wall of the outer support leg of the table and chair.
[0008] When in normal class use, the inner supporting legs of the tables and chairs can be slid up and down along the outer supporting legs of the tables and chairs until the limit plug is directly opposite the corresponding adjustment hole. The elastic part at the lower end of the adjusting lever pushes the limit plug to pass through the corresponding adjustment hole. At this time, the limit stop edge is located outside the outer supporting legs of the tables and chairs, and can also abut against the side walls of the outer supporting legs of the tables and chairs, thereby locking the outer supporting legs of the tables and chairs and the inner supporting legs of the tables and chairs. When only the button is pressed, the button drives the adjusting lever to swing to compress the elastic part, and the elastic part drives the limit plug to move horizontally, and the limit stop edge can abut against the outer wall of the outer supporting legs of the tables and chairs to prevent the limit stop from The limiting plug is completely out of the adjustment hole, so when releasing the vertical lock of the outer supporting legs and the inner supporting legs of the table and chair, it is necessary to first lift the entire inner supporting legs of the table and chair upward along the outer supporting legs of the table and chair for a certain distance. The adjusting lever and the limiting plug are moved up synchronously with the inner supporting legs of the table and chair. The aperture of the adjusting hole is larger than the diameter of the limiting plug, so that the inner supporting legs of the table and chair have space to move upward during positioning, so that the side walls of the outer supporting legs of the table and chair are staggered with the limiting stopper edge, and then the button is pressed so that the limiting plug can be moved horizontally out of the corresponding adjustment hole, thereby realizing the retraction of the limiting plug and releasing the lock of the outer supporting legs and the inner supporting legs of the table and chair.
[0009] For the convenience of adjustment, the button is set on the lateral outside of the table board or the chair board, so that the button is exposed after the outer supporting legs and the inner supporting legs of the table and chair are adjusted and positioned. Although it is convenient for students to adjust and use, it is easy for students to accidentally touch the button when playing or walking. The present application is provided with a limit stop edge at the lower part of the limit plug, and the aperture of the adjustment hole is larger than the diameter of the limit plug, so that during the unlocking process, it is necessary to lift the button upward first to drive the entire inner supporting leg of the table and chair and the adjustment lever to move upward synchronously, and then push the button inward to complete the unlocking, thereby ensuring safety in use.
[0010] In the positioning structure of the above-mentioned table and chair leg lifting and adjusting assembly, the limit plug has a cylindrical limit portion and a hemispherical guiding portion. The limit stop edge is arranged at one end of the limit portion close to the adjusting lever. On the front and rear sides of the limit portion, there are also support walls, and the support walls are connected to the limit stop edge.
[0011] The position of the limit stop edge is set such that the limit stop edge does not affect the positioning of the inner support leg and the outer support leg of the table and chair by the limit plug. Moreover, the setting of the support walls reduces the contact hindrance between the limit portion and the inner support leg and the outer support leg of the table and chair, improving the convenience of using the limit plug and ensuring the safety of the lifting of the table and chair legs.
[0012] In the positioning structure of the above-mentioned table and chair leg lifting and adjusting assembly, the limit stop edge is L-shaped, and the limit stop edge fits and abuts against the outer wall of the outer support leg of the table and chair.
[0013] The L-shaped limit stop edge makes the abutting support between the limit stop edge and the outer support leg of the table and chair more stable. When subjected to a large pulling force, the limit stop edge can still stably abut against the outer support leg of the table and chair, improving the safety performance of the table and chair leg lifting and adjusting assembly.
[0014] In the positioning structure of the above-mentioned table and chair leg lifting and adjusting assembly, a support stop edge is provided inside the limit plug. The support stop edge is arranged opposite to the limit stop edge. The support stop edge, the limit stop edge, and the side wall of the limit plug enclose a clamping groove for the outer support leg of the table and chair to be inserted into.
[0015] The setting of the support stop edge can, while ensuring the limit function of the limit stop edge, maximize the strength of the limit plug and improve the stability of the positioning structure. The clamping groove can also be formed by the outer side wall of the lower part of the limit plug being recessed radially inward.
[0016] In the positioning structure of the above-mentioned table and chair leg lifting and adjusting assembly, the elastic member is a U-shaped spring piece. The U-shaped spring piece includes a reset spring piece in a U shape. A welding block extends axially along the limit portion of the limit plug, and the welding block is welded to the reset spring piece. The welding block is polygonal.
[0017] Through the setting of the reset spring piece, when the limit plug positions the inner support leg and the outer support leg of the table and chair, it can pop out relying on the elastic force of the reset spring piece. And by setting the welding block to be polygonal, it is better to set the side with the limit stop edge below, making it have better directivity during installation, thereby reducing the combination difficulty of the U-shaped spring piece.
[0018] In the positioning structure of the above-mentioned table and chair leg lifting and adjustment assembly, the elastic member is a U-shaped spring piece, and the U-shaped spring piece includes a U-shaped reset spring piece. The limiting portion of the limiting plug has a welding block extending axially, and the welding block is welded to the reset spring piece, and the welding block is elliptical.
[0019] The welding block adopts an elliptical design, which can also achieve directional installation of the reset spring piece and the limit plug, making it more convenient to install. The elliptical setting can also maximize the connection area, making the installation of the reset spring piece and the limit plug faster and more stable.
[0020] In the positioning structure of the above-mentioned table and chair leg lifting and adjustment assembly, the upper end wall of the limiting part is a semicircular arc wall, and the lower end wall of the limiting part is two arc-shaped sliding walls one and two, and the sliding wall two is connected to the guide part, and the limiting stopper is arranged between the sliding wall one and the sliding wall two, and the radius of the sliding wall one is smaller than the radius of the sliding wall two.
[0021] There is no notch or other settings on the upper end of the limit part, so that when the button is lifted up and then pressed, the limit part can be quickly moved out of the adjustment hole to release the lock, and the lower end wall of the limit part is divided into two sliding walls 1 and 2 with different radii, which realizes the protection and locking of the limit stop edge while achieving smoother movement out of the adjustment hole and sliding into the adjustment hole.
[0022] In the above-mentioned positioning structure of the table and chair leg lifting and adjusting assembly, the limit stop edge has a semicircular arc wall.
[0023] The arrangement of this structure enables the limit stop edge to stably abut against the outer wall of the outer supporting leg of the table and chair, thereby achieving the stability of the abutment of the limit stop edge.
[0024] Compared with the prior art, the positioning structure of the table and chair leg lifting and adjusting assembly has the following advantages:
[0025] 1. When releasing the vertical lock of the outer supporting legs and the inner supporting legs of the tables and chairs, it is necessary to first lift the entire inner supporting legs of the tables and chairs upwards for a certain distance along the outer supporting legs of the tables and chairs. The adjusting lever and the limit plug are moved up synchronously with the inner supporting legs of the tables and chairs. The aperture of the adjusting hole is larger than the diameter of the limit plug, so that the inner supporting legs of the tables and chairs have space to move upward when positioning, so that the side walls of the outer supporting legs of the tables and chairs are staggered with the limit stopper, and then press the button so that the limit plug can move horizontally out of the corresponding adjustment hole, realizing the retraction of the limit plug, and releasing the lock of the outer supporting legs and the inner supporting legs of the tables and chairs.
[0026] 2. The welding block can adopt an irregular shape, which is convenient for identifying that the limit stop edge of the limit plug is located at the bottom, and the reset spring and the limit plug are directional during installation, so the limit plug is more convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 It is a schematic structural view of the present utility model installed on a desk and a chair.
[0028] Figure 2 It is Figure 1 The partial enlarged view at position A in
[0029] Figure 3 It is a side view of the present utility model installed on the desk.
[0030] Figure 4 It is Figure 3 The sectional view taken along A - A in
[0031] Figure 5 It is Figure 4 The partial enlarged view at position B in
[0032] Figure 6 It is a schematic structural view of the U - shaped elastic piece in the first embodiment.
[0033] Figure 7 It is a schematic structural view of the U - shaped elastic piece in the second embodiment.
[0034] Figure 8 It is a partial sectional view of the third embodiment.
[0035] In the figure, 1. Outer support leg of the desk and chair; 11. Adjusting hole; 2. Inner support leg of the desk and chair; 3. Table board; 4. Chair board; 5. Adjusting lever; 51. Button; 52. Limit plug; 52a. Limit edge; 52b. Limiting part; 52b1. Arc wall; 52b2. Sliding wall 1; 52b3. Sliding wall 2; 52c. Guide part; 52d. Support wall; 52e. Welding block; 52f. Support edge; 53. U - shaped elastic piece; 53a. Reset elastic piece; 54. Clamping groove. Detailed implementation manners
[0036] The following are specific embodiments of the present utility model and in combination with the accompanying drawings, the technical solutions of the present utility model are further described, but the present utility model is not limited to these embodiments.
[0037] Embodiment 1
[0038] As Figure 1 shown, the positioning structure of the desk and chair leg lifting and adjusting assembly. The desk and chair leg lifting and adjusting assembly includes an outer support leg 1 of the desk and chair and an inner support leg 2 of the desk and chair that is inserted into the outer support leg 1 of the desk and chair and is connected to the table board 3 or the chair board 4. The inner support leg 2 of the desk and chair can slide up and down along the outer support leg 1 of the desk and chair. A plurality of adjusting holes 11 are provided on the outer support leg 1 of the desk and chair, and an adjusting lever 5 is rotatably connected inside the inner support leg 2 of the desk and chair.
[0039] Specifically, as Figure 1-6As shown, the upper end of the adjusting lever 5 is connected to a button 51 that passes through the inner supporting leg 2 of the table and chair. The positioning structure includes an elastic member fixedly connected to the lower end of the adjusting lever 5, and one end of the elastic member has a columnar limiting plug 52. The button 51 is arranged toward the outside of the table board 3 or the chair board 4. The aperture of the adjusting hole 11 is larger than the diameter of the limiting plug 52. The lower part of the limiting plug 52 has a limiting stop edge 52a. When the inner supporting leg 2 of the table and chair slides along the outer supporting leg 1 of the table and chair until the limiting plug 52 is aligned with the corresponding adjusting hole 11, the elastic member pushes the limiting plug 52 to pass through the adjusting hole 11, and the limiting stop edge 52a abuts against the side wall of the outer supporting leg 1 of the table and chair.
[0040] When used in normal classes, the inner supporting leg 2 of the table and chair can be slid up and down along the outer supporting leg 1 of the table and chair until the limit plug 52 is directly opposite to the corresponding adjustment hole 11, and the elastic part at the lower end of the adjusting lever 5 pushes the limit plug 52 to pass through the corresponding adjustment hole 11. At this time, the limit stop edge 52a is located outside the outer supporting leg 1 of the table and chair, and can also abut against the side wall of the outer supporting leg 1 of the table and chair, thereby locking the outer supporting leg 1 of the table and chair and the inner supporting leg 2 of the table and chair. When only the button 51 is pressed, the button 51 drives the adjusting lever 5 to swing to compress the elastic part, and the elastic part drives the limit plug 52 to move horizontally, and the limit stop edge 52a can abut against the outer wall of the outer supporting leg 1 of the table and chair to prevent the limit The plug 52 is completely out of the adjustment hole 11, so when releasing the vertical lock of the outer support leg 1 and the inner support leg 2 of the table and chair, it is necessary to first lift the entire inner support leg 2 of the table and chair upward along the outer support leg 1 of the table and chair for a certain distance, and the adjusting lever 5 and the limit plug 52 are moved up synchronously with the inner support leg 2 of the table and chair. The aperture of the adjustment hole 11 is larger than the diameter of the limit plug 52, so that the inner support leg 2 of the table and chair has space to move upward when positioning, so that the side wall of the outer support leg 1 of the table and chair is staggered with the limit stop edge 52a, and then the button 51 is pressed so that the limit plug 52 can be moved horizontally out of the corresponding adjustment hole 11, thereby realizing the retraction of the limit plug 52 and releasing the lock of the outer support leg 1 and the inner support leg 2 of the table and chair.
[0041] For the convenience of adjustment, the button 51 is set on the lateral outside of the table board 3 or the chair board 4, so that the button 51 is exposed after the outer supporting leg 1 and the inner supporting leg 2 of the table and chair are adjusted and positioned. Although it is convenient for students to adjust and use, it is easy for students to accidentally touch the button 51 when playing or walking. The present application has a limiting stop edge 52a at the lower part of the limiting plug 52, and the aperture of the adjustment hole 11 is larger than the diameter of the limiting plug 52, so that in the unlocking process, it is necessary to lift the button 51 upward to drive the entire inner supporting leg 2 and the adjustment lever 5 to move upward synchronously, and then push the button 51 inward to complete the unlocking, thereby ensuring the safety of use.
[0042] like Figure 2-6As shown, the limit plug 52 has a cylindrical limit portion 52b and a hemispherical guide portion 52c. A limit stop edge 52a is provided at one end of the limit portion 52b close to the adjusting lever 5. Support walls 52d are also provided on the front and rear sides of the limit portion 52b. The support walls 52d are connected to the limit stop edge 52a. The limit stop edge 52a is L-shaped and abuts against the outer wall of the outer support leg 1 of the table and chair.
[0043] As Figure 5 and Figure 6 shown, the elastic member is a U-shaped elastic sheet 53. The U-shaped elastic sheet 53 includes a reset elastic sheet 53a in a U shape. A welding block 52e extends axially along the limit portion 52b of the limit plug 52. The welding block 52e is welded to the reset elastic sheet 53a. The welding block 52e is polygonal.
[0044] As Figure 6 shown, the upper end wall of the limit portion 52b is an arc wall 52b1. The lower end wall of the limit portion 52b is two arc-shaped sliding walls one 52b2 and sliding wall two 52b3. The sliding wall two 52b3 is connected to the guide portion 52c. The radius of the sliding wall one 52b2 is smaller than the radius of the sliding wall two 52b3. The limit stop edge 52a is a semi-circular arc wall.
[0045] Embodiment 2
[0046] The content of this embodiment is basically the same as that of Embodiment 1, and the difference lies in:
[0047] As Figure 7 shown, the elastic member is a U-shaped elastic sheet 53. The U-shaped elastic sheet 53 includes a reset elastic sheet 53a in a U shape. A welding block 52e extends axially along the limit portion 52b of the limit plug 52. The welding block 52e is welded to the reset elastic sheet 53a. The welding block 52e is elliptical.
[0048] Embodiment 3
[0049] The content of this embodiment is basically the same as that of Embodiment 1, and the difference lies in:
[0050] As Figure 8 shown, a support stop edge 52f is provided inside the limit plug 52. The support stop edge 52f is arranged opposite to the limit stop edge 52a. The support stop edge 52f, the limit stop edge 52a and the side wall of the limit plug 52 enclose a clamping groove 54 for the outer support leg 1 of the table and chair to be inserted into.
[0051] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. A positioning structure for a lifting and adjusting component of a table and chair leg. The lifting and adjusting component of the table and chair leg includes an outer support leg (1) of the table and chair and an inner support leg (2) of the table and chair that is inserted into the outer support leg (1) of the table and chair and is connected to a tabletop (3) or a seat board (4). The inner support leg (2) of the table and chair can slide up and down along the outer support leg (1) of the table and chair. A plurality of adjusting holes (11) are formed in the outer support leg (1) of the table and chair. An adjusting lever (5) is rotatably connected inside the inner support leg (2) of the table and chair. The upper end of the adjusting lever (5) is connected to a button (51) that passes through the inner support leg (2) of the table and chair. This positioning structure includes an elastic member fixedly connected to the lower end of the adjusting lever (5). One end of the elastic member has a columnar limiting plug (52). It is characterized in that, The button (51) is arranged towards the outer side of the tabletop (3) or the chair seat (4). The aperture of the adjustment hole (11) is larger than the diameter of the limit plug (52). The lower part of the limit plug (52) has a limit stop edge (52a). When the inner support leg (2) of the table and chair slides along the outer support leg (1) of the table and chair until the limit plug (52) is aligned with the corresponding adjustment hole (11), the elastic member pushes the limit plug (52) to penetrate into the adjustment hole (11), and the limit stop edge (52a) abuts against the side wall of the outer support leg (1) of the table and chair.
2. The positioning structure of the table and chair leg lifting and adjusting assembly according to claim 1, characterized in that, The limit plug (52) has a cylindrical limit portion (52b) and a hemispherical guiding portion (52c). The limit stop edge (52a) is arranged at one end of the limit portion (52b) close to the adjustment lever (5). The front and rear sides of the limit portion (52b) also have support walls (52d), and the support walls (52d) are connected to the limit stop edge (52a).
3. The positioning structure of the table and chair leg lifting and adjusting assembly according to claim 2, characterized in that The limit stop edge (52a) is L-shaped, and the limit stop edge (52a) fits and abuts against the outer wall of the outer support leg (1) of the table and chair.
4. The positioning structure of the table and chair leg lifting and adjusting assembly according to claim 2 or 3, characterized in that, A support stop edge (52f) is arranged inside the limit plug (52). The support stop edge (52f) is arranged opposite to the limit stop edge (52a). The support stop edge (52f), the limit stop edge (52a), and the side wall of the limit plug (52) enclose a clamping groove (54) for the outer support leg (1) of the table and chair to be embedded.
5. The positioning structure of the table and chair leg lifting and adjusting assembly according to claim 2 or 3, characterized in that The elastic member is a U-shaped elastic sheet (53). The U-shaped elastic sheet (53) includes a U-shaped reset elastic sheet (53a). A welding block (52e) extends axially along the limit portion (52b) of the limit plug (52). The welding block (52e) is welded to the reset elastic sheet (53a), and the welding block (52e) is polygonal.
6. The positioning structure of the table and chair leg lifting and adjusting assembly according to claim 2 or 3, characterized in that, The elastic member is a U-shaped elastic sheet (53). The U-shaped elastic sheet (53) includes a U-shaped reset elastic sheet (53a). A welding block (52e) extends axially along the limit portion (52b) of the limit plug (52). The welding block (52e) is welded to the reset elastic sheet (53a), and the welding block (52e) is elliptical.
7. The positioning structure of the table and chair leg lifting and adjusting assembly according to claim 2 or 3, characterized in that The upper end wall of the limit portion (52b) is an arc wall (52b1). The lower end wall of the limit portion (52b) is two arc-shaped sliding walls one (52b2) and sliding wall two (52b3). The sliding wall two (52b3) is connected to the guiding portion (52c). The radius of the sliding wall one (52b2) is smaller than the radius of the sliding wall two (52b3).