Seat tray capable of adjusting chair back in linkage mode
By introducing a linkage adjustment structure and support components into the office chair, the problem of the difficulty in linkage adjustment between the backrest and leg support structure is solved, improving practicality and comfort, and realizing flexible adjustment and fixation of the backrest.
Patent Information
- Application Number
- CN202520447814.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-14
AI Technical Summary
The existing office chairs, after adjusting the backrest angle, cannot achieve coordinated adjustment of the backrest and leg support structure, resulting in limited usability and reduced practicality.
The chair back and support components are linked by a first rotating shaft, a second rotating shaft, a sprocket, a chain, a gear, a toothed plate, and a U-shaped frame. Combined with the design of a screw, a slide bar, and a support plate, the chair back and support components are adjusted in a coordinated manner. The tilt angle of the chair back is fixed by the cooperation of a limit rod and a slot.
It enables the coordinated adjustment of the chair back and support components, improving the practicality and comfort of use, and facilitating height adjustment and angle fixation.
Smart Images
Figure CN223746060U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of chairs, in particular to a seat tray for linkage adjustment of a chair back. BACKGROUND
[0002] Office chairs refer to chairs used in the workplace to support office workers in various office activities. According to different use scenarios and functional requirements, office chairs can be divided into various types, including backrest chairs, large-class chairs, medium-class chairs, guest chairs, staff chairs, conference chairs, visitor chairs, and training chairs. The design and materials of office chairs also have certain standards and requirements. For example, the density and resilience of soft polyurethane foam (commonly used in sponge seat cushions) must meet certain standards, wood materials must meet the requirements of water content and harmful substance limits, and leather and textile fabrics also have corresponding quality standards. These standards ensure the comfort and safety of office chairs. In addition, modern office chairs increasingly focus on ergonomic design to provide better support and comfort for various scenarios such as office work, study, and e-sports.
[0003] Currently, when office chairs are used by workers for rest, the angle of the chair back needs to be adjusted, and then the leg support structure needs to be pulled to support the legs. It is not easy to link the chair back and the leg support structure for adjustment, and the use effect is single, thereby reducing the practicality of the device. CONTENT OF THE INVENTION
[0004] To make up for the above shortcomings, the present application provides a seat tray for linkage adjustment of a chair back, aiming to improve the current office chair problem that when workers use it for rest, the angle of the chair back needs to be adjusted, and then the leg support structure needs to be pulled to support the legs, which is not easy to link the chair back and the leg support structure for adjustment, and the use effect is single, thereby reducing the practicality of the device.
[0005] The present application provides a seat tray for linkage adjustment of a chair back, which includes a seat body and an adjustment structure. The seat body includes a seat tray, a chair back, and a support frame. The chair back is rotationally connected to the seat tray, and the support frame is arranged on one side of the chair back. The adjustment structure includes a first rotation shaft, a second rotation shaft, two chain wheels, a chain, two gears, a toothed plate, a U-shaped frame, and a support assembly. The first rotation shaft and the second rotation shaft are both rotationally connected to the seat tray, and the chair back is connected to the second rotation shaft. The two chain wheels are connected to the first rotation shaft and the second rotation shaft, respectively, and the two chain wheels are connected by the chain. The two gears are both connected to the first rotation shaft, and the toothed plate is arranged in the U-shaped frame. The gears are meshed with the toothed plate, the U-shaped frame is slidingly connected to the seat tray, and the support assembly is arranged in the U-shaped frame.
[0006] In a specific embodiment, the support assembly comprises a screw rod, a slide rod and a support plate, the screw rod is threadedly connected with the U-shaped frame, the screw rod is rotationally connected with the support plate, the slide rod is arranged on one side of the support plate, and the slide rod is slidingly connected with the U-shaped frame.
[0007] In the implementation process, the screw rod, the slide rod and the support plate are arranged to conveniently support the legs of the user during rest, conveniently adjust the use height, and improve the practicability of the device.
[0008] In a specific embodiment, one side of the support plate is embedded with a bearing, and one end of the screw rod is interference-fitted with an inner ring of the bearing.
[0009] In the implementation process, one end of the screw rod is interference-fitted with the inner ring of the bearing, which facilitates the rotational connection of the screw rod and the support plate, and conveniently drives the support plate to rise and fall.
[0010] In a specific embodiment, one end of the screw rod is provided with a rotating block.
[0011] In the implementation process, one end of the screw rod is provided with a rotating block, which facilitates the rotation of the screw rod by the user and is convenient and fast.
[0012] In a specific embodiment, the support plate, the seat tray and one side of the backrest are all provided with sponge pads.
[0013] In the implementation process, the sponge pads are arranged on one side of the support plate, the seat tray and the backrest to conveniently improve the comfort.
[0014] In a specific embodiment, one end of the first rotating shaft is connected with a fixing assembly, the fixing assembly comprises a rotating wheel, a rotating rod, a limiting rod, a sliding block and a spring, the rotating wheel is connected with the first rotating shaft, the rotating rod is connected with the rotating wheel, the limiting rod is slidingly connected with the rotating rod, the limiting rod is clamped with the seat tray, the sliding block is connected with the limiting rod, the sliding block is slidingly connected with the rotating rod, and the spring is sleeved on the limiting rod.
[0015] In the implementation process, the rotating wheel, the rotating rod, the limiting rod, the sliding block and the spring are arranged to conveniently fix the position of the first rotating shaft, thereby conveniently fixing the inclination angle of the backrest.
[0016] In a specific embodiment, a plurality of clamping grooves are uniformly arranged on one side of the seat tray, and the limiting rod is clamped with the clamping grooves.
[0017] In the implementation process, the limiting rod is clamped with the clamping grooves to conveniently adjust to a suitable rest angle, thereby improving the practicability of the seat.
[0018] In a specific embodiment, the limiting rod is provided with a pulling block at one end.
[0019] In the above implementation process, by providing the limiting rod with a pulling block at one end, the user can conveniently pull the limiting rod.
[0020] Compared with the prior art, the application has the beneficial effects that: by providing the first rotating shaft, the second rotating shaft, the two chain wheels, the chain, the two gears, the toothed plate, and the U-shaped frame, the adjustment of the chair back and the extension of the supporting assembly can be conveniently linked, the working efficiency is improved, and the practicability of the device is improved. BRIEF DESCRIPTION OF DRAWINGS
[0021] In order to more clearly illustrate the technical solutions of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.
[0022] Figure 1 is a seat tray cross-sectional structure schematic diagram of a linkage adjustment chair back provided by the embodiments of the application;
[0023] Figure 2 is a seat tray side view structure schematic diagram of a linkage adjustment chair back provided by the embodiments of the application;
[0024] Figure 3 is a seat tray side view cross-sectional structure schematic diagram of a linkage adjustment chair back provided by the embodiments of the application;
[0025] Figure 4 is a supporting assembly cross-sectional structure schematic diagram provided by the embodiments of the application;
[0026] Figure 5 is a fixing assembly cross-sectional structure schematic diagram provided by the embodiments of the application.
[0027] In the drawings: 10 - seat body; 110 - seat tray; 120 - chair back; 130 - supporting frame; 140 - clamping groove; 20 - adjustment structure; 210 - first rotating shaft; 220 - second rotating shaft; 230 - chain wheel; 240 - chain; 250 - gear; 260 - toothed plate; 270 - U-shaped frame; 280 - supporting assembly; 281 - screw rod; 282 - sliding rod; 283 - supporting plate; 290 - fixing assembly; 291 - rotating wheel; 292 - rotating rod; 293 - limiting rod; 294 - sliding block; 295 - spring. DETAILED DESCRIPTION
[0028] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application.
[0029] With reference to Figure 1 , the present application provides a seat tray for linkage adjustment of a chair back, comprising a seat body 10 and an adjustment structure 20.
[0030] With reference to Figure 1 , Figure 2 , Figure 3 and Figure 5 , the seat body 10 comprises a seat tray 110, a chair back 120 and a support frame 130, the chair back 120 is rotationally connected with the seat tray 110, and the support frame 130 is arranged on one side of the chair back 120.
[0031] With reference to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , the adjustment structure 20 comprises a first rotation shaft 210, a second rotation shaft 220, two chain wheels 230, a chain 240, two gear wheels 250, a toothed plate 260, a U-shaped frame 270 and a support assembly 280, the first rotation shaft 210 and the second rotation shaft 220 are both rotationally connected with the seat tray 110, the chair back 120 is connected with the second rotation shaft 220, the two chain wheels 230 are respectively connected with the first rotation shaft 210 and the second rotation shaft 220, the two chain wheels 230 are connected through the chain 240, the two gear wheels 250 are both connected with the first rotation shaft 210, the toothed plate 260 is arranged in the U-shaped frame 270, the gear wheel 250 is engaged with the toothed plate 260, the U-shaped frame 270 is slidingly connected with the seat tray 110, and the support assembly 280 is arranged in the U-shaped frame 270.
[0032] In a specific arrangement, the support assembly 280 comprises a screw rod 281, a sliding rod 282 and a support plate 283, the screw rod 281 is threadedly connected with the U-shaped frame 270, the screw rod 281 is rotationally connected with the support plate 283, the sliding rod 282 is arranged on one side of the support plate 283, and the sliding rod 282 is slidingly connected with the U-shaped frame 270, wherein through the arrangement of the screw rod 281, the sliding rod 282 and the support plate 283, the support of the legs of the user during rest can be facilitated, the use height can be conveniently adjusted, and the practicability of the device is improved.
[0033] In a specific arrangement, a bearing is embedded on one side of the support plate 283, and one end of the screw rod 281 is interference-fitted with an inner ring of the bearing, wherein through the interference-fitting of one end of the screw rod 281 with the inner ring of the bearing, the rotational connection of the screw rod 281 with the support plate 283 can be facilitated, and the lifting of the support plate 283 can be conveniently driven.
[0034] In the specific arrangement, the screw rod 281 is provided with a rotating block at one end, wherein the rotating block at one end of the screw rod 281 can facilitate the user to rotate the screw rod 281, which is convenient and fast.
[0035] In the specific arrangement, the support plate 283, the seat tray 110 and the chair back 120 are provided with sponge pads on one side, wherein the sponge pads on one side of the support plate 283, the seat tray 110 and the chair back 120 can facilitate the improvement of comfort.
[0036] In the specific arrangement, the first rotating shaft 210 is connected with a fixing assembly 290 at one end, the fixing assembly 290 comprises a rotating wheel 291, a rotating rod 292, a limiting rod 293, a sliding block 294 and a spring 295, the rotating wheel 291 is connected with the first rotating shaft 210, the rotating rod 292 is connected with the rotating wheel 291, the limiting rod 293 is slidingly connected with the rotating rod 292, the limiting rod 293 is clamped with the seat tray 110, the sliding block 294 is connected with the limiting rod 293, the sliding block 294 is slidingly connected with the rotating rod 292, and the spring 295 is sleeved on the limiting rod 293, wherein the arrangement of the rotating wheel 291, the rotating rod 292, the limiting rod 293, the sliding block 294 and the spring 295 can facilitate the fixation of the position of the first rotating shaft 210, thereby facilitating the fixation of the inclination angle of the chair back 120.
[0037] In the specific arrangement, the seat tray 110 is uniformly provided with a plurality of clamping grooves 140 on one side, and the limiting rod 293 is clamped with the clamping grooves 140, wherein the clamping of the limiting rod 293 with the clamping grooves 140 can facilitate the adjustment to a suitable rest angle, thereby improving the practicability of the seat.
[0038] In the specific arrangement, the limiting rod 293 is provided with a pulling block at one end, wherein the pulling block at one end of the limiting rod 293 can facilitate the user to pull the limiting rod 293.
[0039] The working principle of the seat tray of the linkage adjusting chair back is as follows: when the seat tray of the linkage adjusting chair back is used, when the user needs to rest, the limiting rod 293 and the sliding block 294 are driven to move by pulling the pull block, and the spring 295 is extruded, so that the limiting rod 293 is disengaged from the clamping groove 140; at this time, the user drives the rotating wheel 291 to rotate through the rotating rod 292, so that the first rotating shaft 210 rotates and drives the second rotating shaft 220 and the chair back 120 to rotate through the chain 240, so as to conveniently incline the chair back 120; the first rotating shaft 210 rotates at the same time to drive the two gears 250 to rotate, and drives the U-shaped frame 270 and the supporting assembly 280 to slide out through the meshing of the two gears 250 and the toothed plate 260; after rotating to the appropriate angle, the spring 295 is reset to make the limiting rod 293 be clamped with the new clamping groove 140, so as to conveniently fix the position of the first rotating shaft 210, thereby conveniently fixing the inclination angle of the chair back 120, so as to conveniently link the adjustment of the chair back 120 with the extension of the supporting assembly 280, thereby improving the practicability of the device; by rotating the screw rod 281, the supporting plate 283 is lifted to conveniently support the legs of the user when resting, thereby improving the comfort, and conveniently adjusting the use height, thereby improving the practicability of the device.
[0040] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. A seat pan for a chair back that is adjusted in linkage, characterized in that, The utility model relates to a chair backrest adjusting device, including Seat body (10), the seat body (10) includes seat tray (110), chair back (120) and support frame (130), the chair back (120) is rotatably connected with the seat tray (110), the support frame (130) is arranged in one side of the chair back (120); Adjusting structure (20), the adjusting structure (20) includes first pivot (210), second pivot (220), two chain wheels (230), chain (240), two gear wheels (250), toothed plate (260), U type frame (270) and support assembly (280), the first pivot (210) and the second pivot (220) are rotatably connected with the seat tray (110), the chair back (120) is connected with the second pivot (220), two chain wheels (230) are connected with the first pivot (210) and the second pivot (220) respectively, two chain wheels (230) are connected through chain (240), two gear wheels (250) are connected with the first pivot (210), the toothed plate (260) is arranged in the U type frame (270), the gear wheel (250) is engaged with the toothed plate (260), the U type frame (270) is slidably connected with the seat tray (110), the support assembly (280) is arranged in the U type frame (270).
2. A chair tray with linked adjustment of the seat pan and the backrest according to claim 1, characterized in that The support assembly (280) includes screw rod (281), slide rod (282) and support plate (283), the screw rod (281) is threadedly connected with the U type frame (270), the screw rod (281) is rotatably connected with the support plate (283), the slide rod (282) is arranged in one side of the support plate (283), and the slide rod (282) is slidably connected with the U type frame (270).
3. A seat pan with a linkage-adjusted seat back according to claim 2, characterized in that The support plate (283) is embedded with a bearing on one side, and the screw rod (281) is interference-fitted with the inner ring of the bearing on one end.
4. A chair tray with linked adjustment of the seat pan and the backrest according to claim 2, characterized in that The screw rod (281) is provided with a rotating block on one end.
5. A chair tray with linked adjustment of the seat pan and the backrest according to claim 2, characterized in that The support plate (283), the seat tray (110) and the chair back (120) are all provided with sponge pads on one side.
6. A chair tray with linked adjustable backrest according to claim 1, wherein, The first pivot (210) is connected with a fixing assembly (290) on one end, the fixing assembly (290) includes a rotating wheel (291), a rotating rod (292), a limiting rod (293), a sliding block (294) and a spring (295), the rotating wheel (291) is connected with the first pivot (210), the rotating rod (292) is connected with the rotating wheel (291), the limiting rod (293) is slidably connected with the rotating rod (292), the limiting rod (293) is clamped with the seat tray (110), the sliding block (294) is connected with the limiting rod (293), the sliding block (294) is slidably connected with the rotating rod (292), and the spring (295) is sleeved on the limiting rod (293).
7. A chair tray with linked adjustment of the seat pan and the backrest according to claim 6, characterized in that A plurality of clamping grooves (140) are uniformly formed in one side of the seat tray (110), and the limiting rod (293) is clamped with the clamping grooves (140).
8. A chair tray with linked adjustment of the seat pan and the backrest according to claim 6, characterized in that The limiting rod (293) is provided with a pulling block at one end.