Seat plate lifting adjusting mechanism
By introducing an automatic support rod and locking assembly into the seat height adjustment mechanism, and using the mechanical structure of the limit rod and limit sleeve to lock the seat height, the problems of unreliability and instability of seat height adjustment in the prior art are solved, and the stable and reliable locking and smooth lifting of the seat height are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- STUFF MEDICAL TECHNOLOGY (FOSHAN) CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-04-14
AI Technical Summary
The existing seat height adjustment mechanism has poor durability, reliability and stability. In particular, the reduced sealing makes it difficult to maintain the height for a long time, and the lifting is not smooth.
The system employs an automatic support rod and locking assembly, utilizing the mechanical structure of the limit rod and limit sleeve to lock the height of the seat plate. Through the engagement of the snap-fit component inside the limit sleeve with the slot on the limit rod, the system achieves stable lifting and reliable locking of the seat plate, avoiding sealing problems between the piston and valve body.
It improves the durability and reliability of seat lifting, ensures the stability and smoothness of seat height, and is easy to operate with a simple and reliable structure.
Smart Images
Figure CN224112351U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of seat accessories technology, and in particular to a seat lifting and adjusting mechanism. Background Technology
[0002] Most office chairs on the market use gas springs or hydraulic lifts as the power source for seat height adjustment. Both gas springs and hydraulic lifts use handles to control valves, allowing fluid to flow between different airtight chambers, thereby changing the support force and achieving smooth height adjustment. Therefore, maintaining the height of office chairs using gas springs or hydraulic lifts primarily depends on the sealing of the valves and pistons. After a period of use, the sealing of typical office chairs deteriorates due to wear, making it difficult to maintain the chair height for extended periods, requiring frequent adjustments and affecting the user experience. Furthermore, since office chairs are usually supported and height-adjusted by a single gas spring or hydraulic lift, uneven height adjustment may occur after prolonged use.
[0003] The technical problem to be solved by this utility model is: how to solve the problem of poor durability, reliability and stability of existing seat lifting and adjusting mechanisms. Utility Model Content
[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a seat lifting and adjusting mechanism, which has the characteristics of simple and reliable structure, convenient adjustment and good durability.
[0005] The technical solution adopted by this utility model is as follows: a seat plate lifting and adjusting mechanism, including an automatic support rod and a locking assembly. The automatic support rod includes a telescopic rod and a sleeve sleeved on the outer surface of the telescopic rod. The locking assembly includes a limiting rod arranged parallel to the telescopic rod, a limiting sleeve that slides with the limiting rod, and a snap-fit component built into the limiting sleeve. The sleeve sleeve is connected to the seat plate. The limiting sleeve is fixed on one side of the sleeve sleeve. The inner wall of the limiting sleeve is provided with a receiving groove for accommodating the snap-fit component. The snap-fit component and the limiting sleeve are telescopically compatible. The surface of the limiting rod is provided with a plurality of slots corresponding to the snap-fit component at axial intervals.
[0006] The seat height adjustment mechanism of this application utilizes an automatic support rod as the power source for seat height adjustment. A limiting rod is set on one side of the automatic support rod, and a limiting sleeve with sliding engagement with the limiting rod is set on the rod sleeve. The limiting sleeve rises and falls synchronously with the rod sleeve. The limiting rod and the limiting sleeve can share the weight of the automatic support rod when the seat is being upgraded, and can also share the total weight of the seat and the passenger when riding, making the force on the seat height adjustment and riding more balanced and stable. Moreover, the seat height locking relies on the engagement of the snap-fit part in the limiting sleeve with the snap-fit groove on the limiting rod. The mechanical locking structure is more reliable and durable than the locking method using a piston and valve body. The seat height locking can only be released by applying external force to remove the snap-fit part from the snap-fit groove, making the operation convenient and reliable.
[0007] In some embodiments, the locking assembly further includes a sliding sleeve fitted on the outer surface of the limiting sleeve. The sliding sleeve has an abutment block and a relief groove corresponding to the snap-fit member inside. The abutment block and the relief groove are arranged sequentially along the axial direction of the sliding sleeve. When the snap-fit member abuts against the abutment block, the snap-fit member protrudes from the inner wall of the limiting sleeve. When the snap-fit member slides into the relief groove, the snap-fit member is recessed or flush with the inner wall of the limiting sleeve.
[0008] By adopting the above technical solution, a sliding sleeve is fitted on the outer surface of the limiting sleeve. When the height of the seat plate is locked, the abutment block inside the sliding sleeve abuts against the snap-fit component, causing the snap-fit component to protrude from the inner wall of the limiting sleeve and snap into the slot. The abutment block can prevent the snap-fit component from retracting, and the structure is reliable. When it is necessary to adjust the height of the seat plate, it is only necessary to drive the sliding sleeve to slide relative to the limiting sleeve, so that the abutment block separates from the snap-fit component and the clearance slot is opposite to the snap-fit component. At this time, the lifting rod sleeve drives the limiting sleeve to rise and fall. At this time, the snap-fit component retracts into the clearance slot, releasing the constraint on the limiting rod.
[0009] In some implementations, the end of the abutment block near the clearance groove is connected to the clearance groove via an arc surface or a slope.
[0010] By adopting the above technical solution, the abutment block and the clearance groove are connected by an arc surface or a slope, which can make the snap-fit part enter and exit the clearance groove more smoothly.
[0011] In some implementations, the diameter of the receiving groove near the limiting rod is smaller than the maximum diameter of the snap-fit component.
[0012] By adopting the above technical solution, it is possible to prevent the snap-fit component from falling from the receiving groove into the inner hole of the limiting sleeve.
[0013] In some embodiments, the locking assembly further includes a reset member built into the sliding sleeve, the reset member being sleeved on the surface of the limiting sleeve, one end of the reset member abutting against the limiting sleeve, and the other end abutting against the end of the abutting block away from the clearance groove.
[0014] By adopting the above technical solution, the reset component can drive the sliding sleeve to reset after the external force pushing the sliding sleeve to slide is removed, so that the abutment block abuts against the snap-fit component. Moreover, in the locked state, the reset component can ensure that the sliding sleeve will not shift, thereby improving the reliability of the lock.
[0015] In some embodiments, a flange is provided at the end of the limiting sleeve near the relief groove, the diameter of the flange being larger than the diameter of the relief groove, and a retaining ring is provided at the end of the limiting sleeve away from the relief groove, the retaining ring abutting against the reset member.
[0016] By adopting the above technical solution, the flange and the retaining ring can be matched to prevent the sliding sleeve from falling off the limiting sleeve.
[0017] In some embodiments, the locking assembly further includes a drive plate and a handle, the drive plate being fixedly connected to the sliding sleeve, and the handle being connected to the drive plate via a traction rope.
[0018] By using the above technical solution, the drive plate can be moved by turning the handle, which in turn causes the sliding sleeve to slide, thereby releasing the locking of the seat plate height.
[0019] In some embodiments, the surface of the sleeve is provided with a mounting base for installing the limiting sleeve, and the limiting sleeve and the mounting base are detachably connected.
[0020] By adopting the above technical solution, the mounting base can be set to facilitate the fixing of the limiting sleeve to the rod sleeve. The detachable connection between the limiting sleeve and the mounting base can facilitate the removal and disassembly of the limiting sleeve and subsequent maintenance.
[0021] In some implementations, the telescopic rod is provided with a fixing seat for fixing the limiting rod.
[0022] By adopting the above technical solution, a fixed base is set to facilitate the installation of the fixed limit rod.
[0023] In some embodiments, the system also includes a guide post and a guide sleeve, wherein the guide post is provided with a limit post on one side, the guide sleeve is fixedly connected to the rod sleeve, and the guide sleeve and the guide post are slidably engaged.
[0024] By adopting the above technical solution, the guide post and guide sleeve can play a guiding role, making the seat plate rise and fall more smoothly. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the seat lifting and adjusting mechanism according to a preferred embodiment of the present invention;
[0026] Figure 2 for Figure 1 A schematic diagram of the seat lifting and adjusting mechanism from another perspective;
[0027] Figure 3 for Figure 1 The diagram shows the structure of the limit sleeve, sliding sleeve, and guide sleeve in the seat lifting and adjusting mechanism.
[0028] Figure 4 for Figure 3 A schematic diagram of the axial section structure of the middle limiting sleeve, sliding sleeve and guide sleeve;
[0029] Figure 5 for Figure 3 Exploded view of the structure of the middle limiting sleeve, sliding sleeve and guide sleeve.
[0030] In the diagram: 100, Seat plate lifting and adjusting mechanism; 10, Automatic support rod; 11, Telescopic rod; 111, Fixed seat; 12, Rod sleeve; 121, Mounting seat; 20, Locking assembly; 21, Limiting rod; 211, Slot; 22, Limiting sleeve; 221, Receiving groove; 222, Flange; 223, Retaining ring; 23, Snap-fit piece; 24, Sliding sleeve; 241, Abutting block; 242, Clearance groove; 25, Reset piece; 26, Drive plate; 30, Guide post; 31, Guide sleeve. Detailed Implementation
[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0032] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. When the number of elements is referred to as "multiple," it can be any number of two or more. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.
[0034] Please see Figures 1 to 5A preferred embodiment of the present invention provides a seat lifting and adjusting mechanism 100, comprising an automatic support rod 10 and a locking assembly 20. The automatic support rod 10 includes a telescopic rod 11 and a sleeve 12 sleeved on the outer surface of the telescopic rod 11. The locking assembly 20 includes a limiting rod 21 arranged parallel to the telescopic rod 11, a limiting sleeve 22 slidably engaged with the limiting rod 21, and a snap-fit member 23 built into the limiting sleeve 22. The sleeve 12 is connected to the seat plate (not shown in the figure). The limiting sleeve 22 is fixed to one side of the sleeve 12. The inner wall of the limiting sleeve 22 is provided with a receiving groove 221 for accommodating the snap-fit member 23. The snap-fit member 23 and the limiting sleeve 22 are telescopically engaged. The surface of the limiting rod 21 is provided with a plurality of slots 211 corresponding to the snap-fit member 23 at intervals along the axial direction.
[0035] The seat height adjustment mechanism 100 of this application uses an automatic support rod 10 as the power source for seat height adjustment. A limiting rod 21 is set on one side of the automatic support rod 10, and a limiting sleeve 22 is set on the rod sleeve 12 to slide with the limiting rod 21. The limiting sleeve 22 rises and falls synchronously with the rod sleeve 12. The limiting rod 21 and the limiting sleeve 22 can share the weight of the automatic support rod 10 when the seat is being upgraded, and can also share the total weight of the seat and the passenger when riding, so that the force is balanced when the seat is being raised and lowered and when riding, making it more stable. Moreover, the seat height is locked by the engagement of the snap-fit part 23 in the limiting sleeve 22 with the snap-fit groove 211 on the limiting rod 21. The mechanical structure locking is more reliable and more durable than the traditional locking method that uses a piston and valve body. The seat height locking can only be released by applying external force to remove the snap-fit part 23 from the snap-fit groove 211, making the operation convenient and reliable.
[0036] As in 3 and Figure 4 As shown, the locking assembly 20 also includes a sliding sleeve 24 sleeved on the outer surface of the limiting sleeve 22. The sliding sleeve 24 is provided with an abutment block 241 and a relief groove 242 corresponding to the snap-fit member 23. The abutment block 241 and the relief groove 242 are arranged sequentially along the axial direction of the sliding sleeve 24. When the snap-fit member 23 abuts against the abutment block 241, the snap-fit member 23 protrudes from the inner wall of the limiting sleeve 22. When the snap-fit member 23 slides into the relief groove 242, the snap-fit member 23 is recessed or flush with the inner wall of the limiting sleeve 22. By fitting a sliding sleeve 24 on the outer surface of the limiting sleeve 22, when the height of the seat plate is locked, the abutment block 241 inside the sliding sleeve 24 abuts against the snap fastener 23, causing the snap fastener 23 to protrude from the inner wall of the limiting sleeve 22 and snap into the snap slot 211. The abutment block 241 can prevent the snap fastener 23 from retracting, and the structure is reliable. When it is necessary to adjust the height of the seat plate, it is only necessary to drive the sliding sleeve 24 to slide relative to the limiting sleeve 22, so that the abutment block 241 separates from the snap fastener 23 and the clearance groove 242 is opposite to the snap fastener 23. At this time, the lifting rod sleeve 12 drives the limiting sleeve 22 to rise and fall. At this time, the snap fastener 23 retracts into the clearance groove 242, releasing the constraint on the limiting rod 21.
[0037] Preferably, the end of the abutment block 241 near the clearance groove 242 is connected to the clearance groove 242 via an arc surface or an inclined surface. The connection between the abutment block 241 and the clearance groove 242 via an arc surface or an inclined surface allows the snap-fit member 23 to enter and exit the clearance groove 242 more smoothly.
[0038] To prevent the snap-fit 23 from falling from the receiving groove 221 into the inner hole of the limiting sleeve 22, the diameter of the receiving groove 221 near the limiting rod 21 is smaller than the maximum diameter of the snap-fit 23.
[0039] In this embodiment, the snap-fit component 23 is a spherical structure. In other embodiments, it can also be a cylinder or other prism.
[0040] Furthermore, in order to ensure that the limiting sleeve 22 and the limiting post are subjected to balanced forces when locked, there are multiple locking parts 23, and each locking part 23 is arranged at intervals along the circumference of the limiting post. The number of locking parts 23 can be increased or decreased according to actual needs.
[0041] Optionally, the number of card slots 211 and the distance between two adjacent card slots 211 can be set according to actual needs.
[0042] Please refer to the following: Figure 4 The locking assembly 20 also includes a reset member 25 built into the sliding sleeve 24. The reset member 25 is sleeved on the surface of the limiting sleeve 22. One end of the reset member 25 abuts against the limiting sleeve 22, and the other end abuts against the end of the abutment block 241 away from the clearance groove 242. The reset member 25 can drive the sliding sleeve 24 to reset after the external force pushing the sliding sleeve 24 is removed, so that the abutment block 241 abuts against the snap-fit member 23. Moreover, in the locked state, the reset member 25 can ensure that the sliding sleeve 24 will not shift, thereby improving the reliability of the lock.
[0043] Optionally, the reset element 25 is a compression spring.
[0044] Furthermore, a flange 222 is provided at the end of the limiting sleeve 22 near the relief groove 242, and the diameter of the flange 222 is larger than the diameter of the relief groove 242. A retaining ring 223 is provided at the end of the limiting sleeve 22 away from the relief groove 242, and the retaining ring 223 abuts against the reset member 25. The cooperation between the flange 222 and the retaining ring 223 can prevent the sliding sleeve 24 from falling off the limiting sleeve 22.
[0045] In one embodiment, the locking assembly 20 further includes a drive plate 26 and a handle (not shown). The drive plate 26 is fixedly connected to the sliding sleeve 24, and the handle is connected to the drive plate 26 via a traction rope (not shown). By moving the handle, the drive plate 26 can be moved, thereby causing the sliding sleeve 24 to slide, thus releasing the locking of the seat height.
[0046] like Figure 1As shown, the surface of the sleeve 12 is provided with a mounting base 121 for installing the limiting sleeve 22, and the limiting sleeve 22 is detachably connected to the mounting base 121. By providing the mounting base 121, the limiting sleeve 22 can be easily fixed on the sleeve 12, and the detachable connection between the limiting sleeve 22 and the mounting base 121 facilitates the installation, removal and subsequent maintenance of the limiting sleeve 22.
[0047] In this embodiment, the upper end of the limiting sleeve 22 is provided with an external thread, and the mounting base 121 is provided with a through hole through which the hydraulic limiting sleeve 22 passes. A nut for locking the limiting sleeve 22 is also provided at one end of the limiting sleeve 22 through the through hole.
[0048] Optionally, the telescopic rod 11 is provided with a fixing seat 111 for fixing the limiting rod 21. The fixing seat 111 is provided to facilitate the installation and fixing of the limiting rod 21.
[0049] In one embodiment, the system further includes a guide post 30 and a guide sleeve 31. The guide post 30 has a limit post on one side, and the guide sleeve 31 is fixedly connected to the rod sleeve 12. The guide sleeve 31 and the guide post 30 are slidably engaged. The cooperation between the guide post 30 and the guide sleeve 31 can play a guiding role, making the lifting and lowering of the seat plate more stable.
[0050] Optionally, the automatic support rod 10 is a pneumatic support rod or a hydraulic support rod.
[0051] When adjusting the seat height, turning the handle drives the drive plate 26, causing the sliding sleeve 24 to slide relative to the limiting sleeve 22, thus separating the abutment block 241 from the locking member 23. The locking member 23 then slides into the clearance groove 242 as the limiting sleeve 22 slides, releasing the lock. To raise the seat, use the automatic support rod 10 to lift the seat to the desired height. To lower the seat, hold the seat down to lower it. Once the seat height is adjusted to the desired position, release the handle, and the drive plate 26... The sliding sleeve 24 is reset under the action of the reset member 25. If the locking member 23 is just locked into the slot 211 at this time, the reset member 25 pushes the sliding sleeve 24 so that the abutment block 241 abuts against the locking member 23. If the locking member 23 is not locked into the slot 211, the lifting force of the automatic force support rod 10 is used to bring the locking member 23 into the nearest slot 211. At the same time, the reset member 25 pushes the sliding sleeve 24 so that the abutment block 241 abuts against the locking member 23 to lock the position of the seat plate.
[0052] Finally, it should be noted that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A seat lifting and adjusting mechanism, comprising an automatic support rod (10) and a locking assembly (20), wherein the automatic support rod (10) comprises a telescopic rod (11) and a sleeve (12) fitted onto the outer surface of the telescopic rod (11), characterized in that: The locking assembly (20) includes a limiting rod (21) arranged parallel to the telescopic rod (11), a limiting sleeve (22) that slides with the limiting rod (21), and a snap-fit component (23) built into the limiting sleeve (22). The rod sleeve (12) is connected to the seat plate. The limiting sleeve (22) is fixed on one side of the rod sleeve (12). The inner wall of the limiting sleeve (22) is provided with a receiving groove (221) for accommodating the snap-fit component (23). The snap-fit component (23) can telescopically engage with the limiting sleeve (22). The surface of the limiting rod (21) is provided with a plurality of slots (211) corresponding to the snap-fit component (23) at axial intervals.
2. The seat lifting and adjusting mechanism according to claim 1, characterized in that, The locking assembly (20) further includes a sliding sleeve (24) sleeved on the outer surface of the limiting sleeve (22). The sliding sleeve (24) is provided with an abutment block (241) and a relief groove (242) corresponding to the snap-fit member (23). The abutment block (241) and the relief groove (242) are arranged sequentially along the axial direction of the sliding sleeve (24). When the snap-fit member (23) abuts against the abutment block (241), the snap-fit member (23) protrudes from the inner wall of the limiting sleeve (22). When the snap-fit member (23) slides into the relief groove (242), the snap-fit member (23) is recessed or flush with the inner wall of the limiting sleeve (22).
3. The seat lifting and adjusting mechanism according to claim 2, characterized in that, The end of the abutment block (241) near the relief groove (242) is connected to the relief groove (242) through an arc surface or a slope.
4. The seat lifting and adjusting mechanism according to claim 2, characterized in that, The diameter of the receiving groove (221) near the limiting rod (21) is smaller than the maximum diameter of the snap fastener (23).
5. The seat lifting and adjusting mechanism according to claim 2, characterized in that, The locking assembly (20) also includes a reset member (25) built into the sliding sleeve (24). The reset member (25) is sleeved on the surface of the limiting sleeve (22). One end of the reset member (25) abuts against the limiting sleeve (22), and the other end abuts against the end of the abutting block (241) away from the relief groove (242).
6. The seat lifting and adjusting mechanism according to claim 5, characterized in that, The limiting sleeve (22) has a flange (222) at one end near the relief groove (242), the diameter of the flange (222) being larger than the diameter of the relief groove (242), and a retaining ring (223) at the other end of the limiting sleeve (22) away from the relief groove (242), the retaining ring (223) abutting against the reset member (25).
7. The seat lifting and adjusting mechanism according to claim 2 or 5, characterized in that, The locking assembly (20) also includes a drive plate (26) and a handle. The drive plate (26) is fixedly connected to the sliding sleeve (24), and the handle is connected to the drive plate (26) by a traction rope.
8. The seat lifting and adjusting mechanism according to claim 1, characterized in that, The surface of the sleeve (12) is provided with a mounting base (121) for installing the limiting sleeve (22), and the limiting sleeve (22) and the mounting base (121) are detachably connected.
9. The seat lifting and adjusting mechanism according to claim 1, characterized in that, The telescopic rod (11) is provided with a fixing seat (111) for fixing the limiting rod (21).
10. The seat lifting and adjusting mechanism according to claim 1, characterized in that, It also includes a guide post (30) and a guide sleeve (31). The guide post (30) has a limit post on one side. The guide sleeve (31) is fixedly connected to the rod sleeve (12). The guide sleeve (31) and the guide post (30) are slidably engaged.