Office chair with pedal function

Abstract

The utility model relates to the technical field of office chairs, in particular to an office chair with a pedal function, which comprises a support frame, a seat plate, a back plate and a fixed seat B. The support frame is provided with universal wheels, a fixed seat A and a lifting driving component, the fixed seat A is rotatably provided with a movable rod A, the movable rod A is connected with a sliding rod A in a sliding manner, and the sliding rod A is connected with a pedal with an antiskid pile at the bottom. A tensioning assembly for driving the movable rod A to rotate is arranged on the fixed seat A; the seat plate is connected with the movable end of the lifting driving assembly; the back plate is rotationally connected with the seat plate, and a limiting mechanism for limiting rotation of the back plate and the seat plate is arranged on the back plate; the fixing base B is arranged on the back plate and rotationally provided with a telescopic rod, the movable end of the telescopic rod is connected with the supporting plate, and the movable end of the telescopic rod is provided with a positioning assembly for limiting stretching and retracting of the telescopic rod. The office chair is provided with the pedal, the office chair is positioned and prevented from moving when the pedal is treaded, and the office chair can be completely laid flat and is provided with a stable supporting structure.

Description

Technical Field

[0001] This utility model relates to the field of office chair technology, and in particular to an office chair with a footrest function. Background Technology

[0002] An office chair is a type of seat designed specifically for office environments. In a narrow sense, it refers to a chair with a backrest used for desktop work. In a broad sense, it encompasses all office chairs, including executive chairs, staff chairs, conference chairs, and other categories. Among these, height-adjustable office chairs are the most common.

[0003] Currently, some office chairs have adjustable backrest angles, but these adjustments are limited due to the need to consider overall stability and they cannot be fully reclined. Furthermore, while existing office chairs may have footrests, these footrests are fixed and only serve to place the feet. The chair's position can shift freely as the user's center of gravity changes. Utility Model Content

[0004] The purpose of this utility model is to address the problems existing in the background technology by proposing an office chair with a footrest function.

[0005] The technical solution of this utility model is as follows: An office chair with a footrest function includes a support frame, on which are mounted casters, a fixed seat A and a lifting drive assembly. A movable rod A is rotatably mounted on the fixed seat A. The movable rod A is slidably connected to a slide rod A. The slide rod A is connected to a footrest with anti-slip posts at the bottom. A tensioning assembly for driving the movable rod A to rotate is provided on the fixed seat A.

[0006] Seat plate, the seat plate is connected to the movable end of the lifting drive assembly;

[0007] The back plate is rotatably connected to the seat plate, and a limiting mechanism is provided on the back plate to restrict its rotation with the seat plate;

[0008] And a fixed base B, which is set on the back plate. A telescopic rod is rotatably mounted on the fixed base B. The movable end of the telescopic rod is connected to the support plate, and a positioning component that restricts the extension and retraction of the telescopic rod is set on the movable end of the telescopic rod.

[0009] Preferably, the tensioning assembly includes a coil spring, a rotating shaft A is provided on the fixed seat A and rotatably connected thereto, one end of the movable rod A is connected to the rotating shaft A, a circular groove coaxial with the rotating shaft A is provided on the fixed seat A, the coil spring is located in the circular groove, the outer end of the coil spring is connected to the arc-shaped inner wall of the circular groove, and the inner end of the coil spring is connected to the arc surface of the rotating shaft A.

[0010] Preferably, a handrail is provided on the back panel and rotatably connected thereto, and a limiting block is provided on the back panel to limit the rotation angle of the handrail.

[0011] Preferably, the limiting mechanism includes an external toothed ring, a slider, a positioning block, a guide rail, a spring A, and a pull rod A. One end of the base plate is provided with a side groove, and a rotating shaft B is provided in the side groove. One end of the back plate is inserted into the side groove and rotatably connected to the rotating shaft B. The external toothed ring is sleeved on the rotating shaft B. A guide groove is provided on the back plate. The slider is slidably disposed in the guide groove. The rotating shaft B passes through the slider and is slidably connected to it. The slider is provided with a toothed groove that meshes with the external toothed ring. The positioning block is disposed in the guide groove. Both ends of the guide rail are connected to the positioning block and the inner wall of the guide groove, respectively. The guide rail passes through the slider and is slidably connected to it. The spring A is sleeved on the guide rail. Both ends of the spring A abut against the movable plate and the inner wall of the guide groove, respectively. One end of the pull rod A is inserted into the guide groove and connected to the movable plate.

[0012] Preferably, there are two sliders and two movable plates. The two sliders are symmetrically arranged in the guide groove. A rack is set on the side of the two movable plates that are close to each other. A gear is rotatably arranged in the guide groove. The gear is located between the two racks and meshes with the racks on both sides. A pull rod A is connected to each of the two movable plates.

[0013] Preferably, there are two sets of telescopic rods, each telescopic rod including a movable rod B and a sliding rod B. One end of the movable rod B is rotatably connected to the fixed base B, and one end of the sliding rod B is inserted into the movable rod B and slidably connected thereto. The support plate is connected to the end of the sliding rod B that extends out of the movable rod B.

[0014] Preferably, the positioning assembly includes a fixed plate, a slide rod C, a pull rod B, and a locking block. The movable rod B is provided with a slide groove and a number of positioning holes that are equidistantly distributed along the length of the movable rod B and communicate with the slide groove. The two ends of the fixed plate are respectively inserted into the slide grooves on the corresponding sides and connected to the slide rod B. The slide rod C is slidably mounted on the fixed plate. The pull rod B is connected to the slide rod C. The locking block is connected to the pull rod B and is inserted into the positioning hole on the corresponding side.

[0015] Preferably, a limiting end cap is provided at the end of the slide rod C away from the pull rod B, and a spring B is sleeved on the slide rod C, with the two ends of the spring B abutting against the limiting end cap and the fixing plate respectively.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] By incorporating a fixed base, movable rod A, sliding rod A, pedal, anti-slip posts, and tensioning components, the user can easily place their feet on the pedal and the anti-slip posts can position the office chair to prevent movement. The pedal is also telescopically adjustable. The chair can be quickly converted into a comfortable bed by a seat and a backrest that can be fully reclined relative to the seat, with a height-adjustable support plate at the bottom of the backrest, improving stability and facilitating rest for employees. A limiting mechanism, consisting of a rotating shaft B with an external toothed ring and a toothed slider, restricts the relative rotation of the backrest and seat, making operation convenient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of one embodiment of the present utility model;

[0019] Figure 2 A schematic diagram of the connection structure of each component on the seat plate and the back plate;

[0020] Figure 3 A schematic diagram of the connection structure of each component on the back panel;

[0021] Figure 4 for Figure 3 Enlarged view of section A;

[0022] Figure 5 This is a structural diagram of the supporting mechanism;

[0023] Figure 6 This is a schematic diagram of the positioning component.

[0024] Reference numerals: 1. Support frame; 2. Casters; 3. Fixed base A; 301. Rotating shaft A; 4. Movable rod A; 5. Slide rod A; 6. Pedal; 7. Anti-slip post; 8. Coil spring; 9. Lifting drive assembly; 10. Seat plate; 11. Rotating shaft B; 111. External gear ring; 12. Back plate; 121. Slider; 122. Gear groove; 13. Handrail; 14. Movable plate; 15. Rack; 16. Gear ; 17. Positioning block; 18. Guide rail; 19. Spring A; 20. Pull rod A; 21. Fixed seat B; 22. Movable rod B; 221. Slide groove; 222. Positioning hole; 23. Slide rod B; 24. Support plate; 25. Positioning assembly; 251. Fixed plate; 252. Slide rod C; 253. Pull rod B; 254. Locking block; 255. Handle; 256. Limiting end cap; 257. Spring B. Detailed Implementation

[0025] Example 1

[0026] like Figures 1-6As shown, this utility model proposes an office chair with a footrest function, including a support frame 1, a seat 10, a backrest 12, and a fixed base B21. The support frame 1 is equipped with casters 2, a fixed base A3, and a lifting drive assembly 9. A movable rod A4 is rotatably mounted on the fixed base A3, and the movable rod A4 is slidably connected to a sliding rod A5. The sliding rod A5 is connected to a footrest 6 with anti-slip posts 7 at its bottom. A tensioning assembly is provided on the fixed base A3 to drive the movable rod A4 to rotate. The tensioning assembly includes a coil spring 8. A rotating shaft A301 is rotatably connected to the fixed base A3. One end of the movable rod A4 is connected to the rotating shaft A301. A circular groove coaxial with the rotating shaft A301 is provided on the fixed base A3. The coil spring 8 is located within the circular groove, with its outer end connected to the arc-shaped inner wall of the circular groove and its inner end connected to the arc surface of the rotating shaft A301. The main structural principle of the lifting drive assembly 9 is to achieve height adjustment through a pneumatic rod. The gas spring is filled with nitrogen, typically with a purity of over 90% to ensure safety. Inside the gas spring is a cylinder filled with 1-2 atmospheres of nitrogen and sealed with a sealing ring. The piston rod inside the cylinder moves up and down under pressure, engaging with the seat's adjustment handle (i.e., locking device) to achieve the chair's height adjustment function. Its specific structure is the same as the height adjustment structure of traditional office chairs, and since it's an existing structure, it will not be described in detail. The seat plate 10 is connected to the movable end of the height adjustment drive assembly 9. The backrest 12 is rotatably connected to the seat plate 10, and a limiting mechanism is provided on the backrest 12 to restrict its rotation relative to the seat plate 10. The limiting mechanism includes an external toothed ring 111, a slider 121, a positioning block 17, a guide rail 18, a spring A19, and a pull rod A20. One end of the base plate 10 is provided with a side groove, and a rotating shaft B11 is provided in the side groove. One end of the back plate 12 is inserted into the side groove and rotatably connected to the rotating shaft B11. The external toothed ring 111 is sleeved on the rotating shaft B11. A guide groove is provided on the back plate 12. The slider 121 is slidably disposed in the guide groove. The rotating shaft B11 passes through the slider 121 and is slidably connected to it. The slider 121 is provided with a toothed groove 122 that meshes with the external toothed ring 111. The positioning block 17 is disposed in the guide groove. Both ends of the guide rail 18 are connected to the positioning block 17 and the inner wall of the guide groove, respectively. The guide rail 18 passes through the slider 121 and is slidably connected to it. The spring A19 is sleeved on the guide rail 18. Both ends of the spring A19 abut against the movable plate 14 and the inner wall of the guide groove, respectively. One end of the pull rod A20 is inserted into the guide groove and connected to the movable plate 14. A handrail 13 is rotatably connected to the back plate 12, and a limiting block is provided on the back plate 12 to limit the rotation angle of the handrail 13. A fixed base B21 is provided on the back plate 12, and a telescopic rod is rotatably mounted on the fixed base B21. The movable end of the telescopic rod is connected to the support plate 24, and a positioning component 25 is provided on the movable end of the telescopic rod to limit the extension and retraction of the telescopic rod.There are two sets of telescopic rods, each consisting of a movable rod B22 and a sliding rod B23. One end of the movable rod B22 is rotatably connected to the fixed base B21, and one end of the sliding rod B23 is inserted into and slidably connected to the movable rod B22. The support plate 24 is connected to the end of the sliding rod B23 that extends out of the movable rod B22. The positioning assembly 25 includes a fixed plate 251, a sliding rod C252, a pull rod B253, and a locking block 254. The movable rod B22 is provided with a sliding groove 221 and several positioning holes 222 that are equidistantly distributed along the length of the movable rod B22 and communicate with the sliding groove 221. Both ends of the fixed plate 251 are inserted into the corresponding sliding grooves 221 and connected to the sliding rod B23. The sliding rod C252 is slidably mounted on the fixed plate 251. The pull rod B253 is connected to the sliding rod C252, and the locking block 254 is connected to the pull rod B253 and inserted into the corresponding positioning hole 222. A limiting end cap 256 is provided at the end of the slide rod C252 away from the pull rod B253. A spring B257 is sleeved on the slide rod C252. The two ends of the spring B257 abut against the limiting end cap 256 and the fixing plate 251 respectively. A handle 255 is provided on the side of the pull rod B253 away from the fixing plate 251.

[0027] In this embodiment, the height adjustment function of this office chair is the same as that of a traditional office chair, and the operation method will not be described in detail. When the user is sitting on the office chair and does not step on the pedal 6, the office chair can move on the ground via the casters 2. When the user steps on the pedal 6, the foot applies pressure to the pedal 6, the pedal 6 flips and causes the anti-slip post 7 to land on the ground, thereby fixing the position of the office chair and preventing it from moving. When the back panel 12 needs to be laid flat, pull the lever A20. The lever A20 pulls the movable plate 14 to slide, and the movable plate 14 drives the slider 121 to slide, thereby causing the slider 121 to disengage from the outer toothed ring 111, thus releasing the locking limit on the back panel angle. After the back panel 12 is laid flat, release the lever A20. The movable plate 14 resets under the tension of the spring A19 and re-engages with the outer toothed ring 111. Then, fix the movable rod B22 with one hand and pull the handle 255 with the other hand. The handle 255 drives the lever B253 away from the fixed plate 251, thereby causing the locking block 254 to disengage from the positioning hole 222. With the help of the handle 255, pull the sliding rod B23 and flip the telescopic rod so that the support plate 24 touches the ground. At this time, the operation of supporting the back panel 12 after it is laid flat is completed. The user can lie on the flat surface formed by the seat plate 10 and the back panel 12 to rest. The angle of the back panel 12 can be adjusted arbitrarily according to personal preference. The operation is simple and convenient.

[0028] Example 2

[0029] like Figures 2-4As shown, the office chair with footrest function proposed in this utility model has two sliders 121 and two movable plates 14 compared to Embodiment 1. The two sliders 121 are symmetrically arranged in the guide groove. A rack 15 is provided on the side of the two movable plates 14 that are close to each other. A gear 16 is rotatably arranged in the guide groove. The gear 16 is located between the two racks 15 and meshes with the racks 15 on both sides. A pull rod A20 is connected to each of the two movable plates 14.

[0030] In this embodiment, when the limiting mechanism is used to release the rotation restriction on the back plate 12 and the seat plate 10, the lever A20 on either side can be pulled. Compared with the traditional single-sided operation, it can be applied to more scenarios and users.

[0031] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. An office chair with a footrest function, characterized in that, include: A support frame (1) is provided with casters (2), a fixed seat A (3) and a lifting drive assembly (9). A movable rod A (4) is rotatably provided on the fixed seat A (3). The movable rod A (4) is slidably connected to a slide rod A (5). The slide rod A (5) is connected to a pedal (6) with anti-slip posts (7) at the bottom. A tensioning assembly for driving the movable rod A (4) to rotate is provided on the fixed seat A (3). Seat plate (10), the seat plate (10) is connected to the movable end of the lifting drive assembly (9); Back plate (12), which is rotatably connected to seat plate (10), and a limiting mechanism is provided on back plate (12) to restrict its rotation with seat plate (10); And a fixed seat B (21), the fixed seat B (21) is set on the back plate (12), a telescopic rod is rotatably set on the fixed seat B (21), the movable end of the telescopic rod is connected to the support plate (24), and a positioning component (25) that restricts the extension and retraction of the telescopic rod is set on the movable end of the telescopic rod.

2. The office chair with a footrest function according to claim 1, characterized in that, The tensioning assembly includes a coil spring (8), a rotating shaft A (301) rotatably connected to a fixed base A (3), one end of a movable rod A (4) connected to the rotating shaft A (301), a circular groove coaxial with the rotating shaft A (301) on the fixed base A (3), the coil spring (8) located in the circular groove, the outer end of the coil spring (8) connected to the arc-shaped inner wall of the circular groove, and the inner end of the coil spring (8) connected to the arc surface of the rotating shaft A (301).

3. An office chair with a footrest as described in claim 1, characterized in that, A handrail (13) is provided on the back plate (12) and is rotatably connected thereto, and a limiting block is provided on the back plate (12) to limit the rotation angle of the handrail (13).

4. An office chair with a footrest as described in claim 1, characterized in that, The limiting mechanism includes an external gear ring (111), a slider (121), a positioning block (17), a guide rail (18), a spring A (19), and a pull rod A (20). One end of the seat plate (10) is provided with a side groove, and a rotating shaft B (11) is provided in the side groove. One end of the back plate (12) is inserted into the side groove and rotatably connected to the rotating shaft B (11). The external gear ring (111) is sleeved on the rotating shaft B (11). A guide groove is provided on the back plate (12), and the slider (121) is slidably disposed in the guide groove. The rotating shaft B (11) passes through the slider (121) and slides with it. The slider (121) is connected to the guide groove, and the slider (121) is provided with a toothed groove (122) that meshes with the outer toothed ring (111). The positioning block (17) is set in the guide groove. The two ends of the guide rail (18) are connected to the positioning block (17) and the inner wall of the guide groove, respectively. The guide rail (18) passes through the slider (121) and is slidably connected to it. The spring A (19) is sleeved on the guide rail (18). The two ends of the spring A (19) abut against the movable plate (14) and the inner wall of the guide groove, respectively. One end of the pull rod A (20) is inserted into the guide groove and connected to the movable plate (14).

5. An office chair with a footrest as described in claim 4, characterized in that, There are two sliders (121) and two movable plates (14). The two sliders (121) are symmetrically arranged in the guide groove. A rack (15) is set on the side of the two movable plates (14) that are close to each other. A gear (16) is rotatably arranged in the guide groove. The gear (16) is located between the two racks (15) and meshes with the racks (15) on both sides. A pull rod A (20) is connected to each of the two movable plates (14).

6. An office chair with a footrest as described in claim 1, characterized in that, There are two sets of telescopic rods. The telescopic rods include a movable rod B (22) and a sliding rod B (23). One end of the movable rod B (22) is rotatably connected to the fixed seat B (21). One end of the sliding rod B (23) is inserted into the movable rod B (22) and slidably connected to it. The support plate (24) is connected to the end of the sliding rod B (23) that extends out of the movable rod B (22).

7. An office chair with a footrest as described in claim 6, characterized in that, The positioning component (25) includes a fixed plate (251), a slide bar C (252), a pull rod B (253), and a locking block (254). The movable rod B (22) is provided with a slide groove (221) and several positioning holes (222) that are equidistantly distributed along the length of the movable rod B (22) and communicate with the slide groove (221). The two ends of the fixed plate (251) are respectively inserted into the slide groove (221) on the corresponding side and connected to the slide bar B (23). The slide bar C (252) is slidably set on the fixed plate (251). The pull rod B (253) is connected to the slide bar C (252). The locking block (254) is connected to the pull rod B (253) and is inserted into the positioning hole (222) on the corresponding side.

8. An office chair with a footrest as described in claim 7, characterized in that, A limiting end cap (256) is provided at the end of the slide rod C (252) away from the pull rod B (253). A spring B (257) is sleeved on the slide rod C (252). The two ends of the spring B (257) abut against the limiting end cap (256) and the fixing plate (251) respectively.

Images