Adjusting mechanism for telescopic rod and desk and chair

Abstract

The utility model relates to the technical field of human life necessities, and provides an adjusting mechanism for a telescopic rod and a desk and chain.The adjusting mechanism for the telescopic rod comprises a lining and a locking piece, the lining is provided with a central through hole penetrating through the two ends, one end of the lining is provided with an inserting part, and the other end of the lining is provided with a locking part; the locking piece comprises a lock sleeve with an opening and a lock handle driving the opening of the lock sleeve to be closed for locking or separated for unlocking, and a first buckling part is arranged on the inner side face of the lock sleeve. And a second buckling part locked with the first buckling part is arranged on the locking part. The position of the inner pipe of the table leg or the chair leg can be locked by rotating the lock handle, it is ensured that the table leg or the chair leg capable of being telescopically adjusted is stable and not prone to sliding, on the contrary, when the height needs to be adjusted, the lock handle and an opening of the lock sleeve only need to be reversely rotated, separation and unlocking are achieved, the inner pipe can freely slide, height adjustment is achieved, operation is easy and convenient, the structure is stable, and cost is low. And the user experience can be effectively improved.

Description

Technical Field

[0001] This utility model relates to the technical field essential to human life, specifically to an adjustment mechanism for a telescopic rod and a desk and chair. Background Technology

[0002] With societal development, education is constantly progressing, and schools are continuously improving their learning environments to provide students with more comprehensive services. Adjustable desks and chairs can greatly enhance the learning environment, accommodating the diverse heights of students and eliminating the problem of mismatched heights caused by traditional desks and chairs. Furthermore, this mismatch is a major contributing factor to the high incidence of myopia among students. In addition, it can easily lead to abnormal spinal curvature, thereby affecting students' learning efficiency and growth.

[0003] However, existing classroom chairs and seats typically use spring pins for height adjustment. However, spring pins are easily affected by external forces and have poor stability. Using bolts for additional locking requires tools and can easily damage the table or chair legs. The operation is also cumbersome and inconvenient for adjustment. Utility Model Content

[0004] The purpose of this utility model is to provide an adjustment mechanism for a telescopic rod and a desk and chair, thereby improving the problem of inconvenient height adjustment of existing desks and chairs.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An adjustment mechanism for a telescopic rod includes:

[0007] A bushing having a central through hole extending through both ends, one end of the bushing having a insertion portion, and the other end of the bushing having a locking portion; and

[0008] A locking component includes a lock sleeve with an opening and a lock handle that drives the opening of the lock sleeve to close for locking or to unlock. A first fastening part is provided on the inner side of the lock sleeve.

[0009] The locking part is provided with a second fastening part that is locked to the first fastening part.

[0010] Preferably, the locking sleeve has symmetrically arranged protrusions at the opening;

[0011] The locking end of the lock handle is provided with an eccentric wheel that abuts against one of the protrusions, and a locking rod that passes through the two protrusions and is connected to the shaft of the eccentric wheel. The other end of the locking rod is provided with a limiting part that abuts against another protrusion.

[0012] Preferably, the end of the lock handle is provided with a finger groove.

[0013] Preferably, the first and second fastening portions are provided in multiple pairs at intervals.

[0014] Preferably, a plurality of guide protrusions are provided at intervals on the inner side of the bushing.

[0015] Preferably, the plug portion is provided with at least one first open-loop groove.

[0016] Preferably, the locking part is provided with at least one second open-loop groove.

[0017] Preferably, the handle portion of the lock handle has an arc-shaped structure.

[0018] Preferably, it also includes an outer tube and an inner tube sleeved inside the outer tube and sliding along the outer tube. The outer tube is provided with a plurality of positioning holes, and the inner tube is provided with a spring pin that is inserted into the positioning holes for locking or unlocking.

[0019] A desk and chair are also provided, including the aforementioned adjustment mechanism for the telescopic rod.

[0020] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0021] 1. In this utility model, the position of the inner tube of the table leg or chair leg can be locked by rotating the locking handle, ensuring that the telescopic adjustable table leg or chair leg is stable and does not easily slide. Conversely, when the height needs to be adjusted, simply rotate the locking handle in the opposite direction, and the opening of the lock sleeve will separate and unlock, allowing the inner tube to slide freely and achieve height adjustment. Its operation is simple and the structure is stable, which can effectively improve the user experience.

[0022] 2. In this utility model, the guide protrusion of the bushing can be engaged with the locking hole of the outer tube, and the first engaging part of the locking sleeve can be engaged with the second engaging part of the locking part of the bushing, thereby achieving a self-locking connection without the need for additional connecting parts (such as bolts).

[0023] 3. In this utility model, the lock handle is covered with a lock ring to achieve locking, which makes it difficult to loosen and less likely to snag on foreign objects, thus improving the reliability and safety of use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the adjustment mechanism for the telescopic rod described in this utility model;

[0025] Figure 2 This is another structural schematic diagram of the adjustment mechanism for the telescopic rod described in this utility model;

[0026] Figure 3 This is a disassembled structural diagram of the adjustment mechanism for the telescopic rod described in this utility model;

[0027] Figure 4 This is a top view of the adjustment mechanism for the telescopic rod described in this utility model;

[0028] Figure 5 This is a schematic diagram of the adjustment mechanism for the telescopic rod described in this utility model installed on the legs of a desk;

[0029] Figure 6 This is a cross-sectional view of the adjustment mechanism for the telescopic rod described in this utility model installed on a table leg.

[0030] Figure 7 for Figure 6 A magnified view of a portion of point A in the middle.

[0031] Explanation of reference numerals in the attached figures:

[0032] 10. Bushing; 101. Central through hole; 102. Insertion part; 1021. First open-ring groove;

[0033] 103. Locking part; 1031. Second engaging part; 1032. Second open annular groove; 104. Guide protrusion;

[0034] 11. Locking component; 111. Lock sleeve; 1111. First engaging part; 1112. Protrusion; 1113. Opening;

[0035] 112. Lock handle; 1121. Eccentric wheel; 1122. Finger groove;

[0036] 12. Locking bar; 121. Limiting part;

[0037] 20. Table leg; 21. Inner tube; 211. Spring pin; 22. Outer tube; 221. Clip hole;

[0038] 222. Positioning hole. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0040] Additionally, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are all based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element of this utility model must have a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] When an element is referred to as being "fixed to," "set on," or "contained on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to," it can be directly connected to or indirectly connected to that other element.

[0042] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] Example 1

[0044] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, this embodiment provides an adjustment mechanism for a telescopic rod, including a bushing 10 and a locking member 11. The bushing 10 is provided with a central through hole 101 extending through both ends. One end of the bushing 10 is provided with a plug-in portion 102, and the other end of the bushing 10 is provided with a locking portion 103. The locking member 11 includes an open locking sleeve 111 and a locking handle 112 that drives the opening of the locking sleeve 111 to close for locking or to unlock. A first fastening portion 1111 is provided on the inner side of the locking sleeve 111. A second fastening portion 1031 that is locked with the first fastening portion 1111 is provided on the locking portion 103.

[0045] Specifically, the insertion part 102 at one end of the bushing 10 is inserted into the outer tube 22 of the table leg 20 or chair leg, and the central through hole 101 of the bushing 10 allows the inner tube 21 of the table leg 20 or chair leg to pass through, so that the bushing 10 is securely locked onto the connecting end of the outer tube 22. The locking part 103 at the other end of the bushing 10 is sleeved on the outside of the inner tube 21 of the table leg 20 or chair leg. Rotating the locking handle 112 can cause the locking handle 112 to clamp the locking sleeve 111, so that the locking sleeve 111 is clamped. The locking handle 112 clamps the outside of the locking sleeve 111, and the long axis of the locking sleeve 111 is compressed, thereby clamping the inner tube 21, and the opening of the locking sleeve 111 gradually closes. Furthermore, the first engaging part 1111 and the second engaging part 1031 are tightly engaged, thereby achieving a self-locking connection. This ensures that the adjustment mechanism is securely fastened at the connection between the inner tube 21 and the outer tube 22 of the table leg 20 or chair leg, guaranteeing that the telescopically adjustable table leg 20 or chair leg is stable and does not easily slip. Conversely, when height adjustment is required, simply rotate the locking handle 112 in the opposite direction, and the opening of the locking sleeve 111 will separate and unlock, allowing the inner tube 21 to slide freely, thus achieving height adjustment. Its operation is simple, and its structure is stable, effectively improving the user experience.

[0046] Furthermore, safety is further enhanced through the lower structure. A spring pin 211 is installed in the inner tube 21, and several positioning holes 222 are equidistantly arranged on the outer tube 22. Loosening the locking member 11 releases the clamping force on the inner tube 21, and pressing the spring pin 211 of the inner tube 21 allows the inner tube 21 to slide freely until the spring pin 211 engages with the corresponding positioning hole 222. Then, the locking member 11 is locked to fix the height position of the table leg 20 or chair leg. This significantly improves ease of use and simplifies the structure compared to using bolts or other locking devices. No additional tools are required, and it is less likely to snag on other objects during use, thus improving safety.

[0047] In this embodiment, the lock sleeve 111 is symmetrically provided with protrusions 1112 at the opening; the locking end of the lock handle 112 is provided with an eccentric wheel 1121 that abuts against one of the protrusions 1112, and a lock rod 12 that passes through the two protrusions 1112 and is connected to the shaft of the eccentric wheel 1121 at one end, and a limiting part 121 that abuts against another protrusion 1112 is provided on the other end of the lock rod 12.

[0048] Specifically, the lock handle 112 rotates around the eccentric wheel 1121, thereby clamping the lock sleeve 111, compressing its long axis, and further tightening the inner tube 21 to ensure a stable connection. When the lock handle 112 rotates, the limiting part 121 provides a limiting force to further promote the gradual closing of the opening of the lock sleeve 111 and enhance the locking effect.

[0049] In this embodiment, the end of the lock handle 112 is provided with a finger groove 1122. The finger groove 1122 is convenient for the operator to grip. When the lock handle 112 is clamped to the lock sleeve 111, the design of the finger groove 1122 makes it possible for the operating end of the lock handle 112 to have a certain distance from the lock sleeve 111, so that the fingers can be inserted to operate the lock handle 112 and unlock it.

[0050] In this embodiment, multiple pairs of first fastening parts 1111 and second fastening parts 1031 are provided at intervals to enhance the stability of the locking and prevent loosening.

[0051] In this embodiment, a plurality of guide protrusions 104 are spaced apart on the inner side of the bushing 10. The outer tube 22 of the table leg 20 or chair leg is provided with locking holes 221 corresponding to the guide protrusions 104. When the insertion part 102 of the bushing 10 is inserted into the outer tube 22, the guide protrusions 104 and the locking holes 221 of the outer tube 22 are engaged to achieve self-locking, thereby securely locking the bushing 10 onto the connecting end of the outer tube 22. Furthermore, the guide protrusions 104 are provided with inclined surfaces, which guide the bushing 10 to facilitate insertion, reduce insertion resistance, and ensure smooth insertion.

[0052] In this embodiment, the insertion part 102 is provided with at least one first open-loop groove 1021. The locking part 103 is provided with at least one second open-loop groove 1032. The first open-loop groove 1021 provides space for deformation of the insertion part 102 so that the insertion part 102 can be smoothly inserted into the outer tube 22; the second open-loop groove 1032 provides space for deformation of the locking part 103. When the handle part of the lock handle 112 hugs the lock sleeve 111, the opening 1113 of the lock sleeve 111 gradually closes and the long axis shortens. At this time, the lock sleeve 111 applies a clamping force to the locking part 103, causing the locking part 103 to deform and clamp the inner tube 21.

[0053] In this embodiment, the lock handle 112 has an arc-shaped structure, and the cross-sections of the bushing 10 and the lock sleeve 111 can be circular or oblong to accommodate different table or chair leg shapes. That is, when the cross-section is circular, the position of the movable end of the handle 112 when it engages with the lock sleeve 111 should exceed the radius of the lock sleeve 111; when the cross-section is oblong, the position of the movable end of the handle should exceed half the length of the minor axis of the lock sleeve 111, so that the lock handle 112 can securely engage and tighten the lock sleeve 111.

[0054] Example 2

[0055] like Figure 5 , Figure 6 and Figure 7As shown, a second aspect of this embodiment also provides a school desk and chair, including the adjustment mechanism for the telescopic rod described in Embodiment 1. The desk legs 20 or chair legs are telescopic rods that can be extended and adjusted. The telescopic rod consists of an outer tube 22 and an inner tube 21. The inner tube 21 slides along the outer tube 22, thereby achieving height adjustment. The adjustment mechanism is located at the connection position between the inner tube 21 and the outer tube 22 of the school desk and chair, thereby fixing the position of the inner tube 21 and locking the height of the desk legs 20 or chair legs. Self-locking can be achieved simply by turning the locking handle 112, making operation simple and convenient, and possessing good practicality.

[0056] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An adjusting mechanism for a telescopic rod, characterized in that, include: A bushing having a central through hole extending through both ends, one end of the bushing having an insertion part, and the other end of the bushing having a locking part; and A locking component includes a lock sleeve with an opening and a lock handle that drives the opening of the lock sleeve to close for locking or to unlock. A first fastening part is provided on the inner side of the lock sleeve. The locking part is provided with a second fastening part that is locked to the first fastening part.

2. The adjusting mechanism for the telescopic rod according to claim 1, characterized in that: The locking sleeve has symmetrical protrusions at the opening; The locking end of the lock handle is provided with an eccentric wheel that abuts against one of the protrusions, and a locking rod that passes through the two protrusions and is connected to the shaft of the eccentric wheel. The other end of the locking rod is provided with a limiting part that abuts against another protrusion.

3. The adjusting mechanism for the telescopic rod according to claim 1, characterized in that: The end of the lock handle is provided with a finger groove.

4. The adjusting mechanism for the telescopic rod according to claim 1, characterized in that: The first and second fastening parts are provided in multiple pairs at intervals.

5. The adjusting mechanism for the telescopic rod according to claim 1, characterized in that: The inner surface of the bushing is provided with a plurality of guide protrusions at intervals.

6. The adjusting mechanism for the telescopic rod according to claim 1, characterized in that: The plug portion is provided with at least one first open-loop groove.

7. The adjusting mechanism for the telescopic rod according to claim 1 or 6, characterized in that: The locking part is provided with at least one second open-loop groove.

8. The adjusting mechanism for the telescopic rod according to claim 1, characterized in that: The handle of the lock handle has an arc-shaped structure.

9. The adjusting mechanism for the telescopic rod according to claim 1, characterized in that: It also includes an outer tube and an inner tube that is sleeved inside the outer tube and slides along the outer tube. The outer tube is provided with a plurality of positioning holes, and the inner tube is provided with a spring pin that is inserted into the positioning holes for locking or unlocking.

10. A type of school desk and chair, characterized in that, Includes the adjustment mechanism for the telescopic rod as described in any one of claims 1-9.

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