Office chair with linked chair back and chair seat

Abstract

The utility model discloses an office chair with linked chair back and chair seat. The office chair comprises a chair seat (1), a chair back (2), a headrest, two armrests and a base, the chair seat (1) comprises a chair seat inner frame (3) and a chair seat filling block, the chair back (2) comprises a chair back inner frame (4) and a chair back filling block, the left side and the right side of the chair seat inner frame (3) and the left side and the right side of the chair back inner frame (4) are respectively provided with angle adjusters (5) which are in bilateral symmetry, and the two sides of the chair back (2) are provided with chair back quick-turning buttons (8). The chair back quick-turning button (8) is connected with a cam connecting shaft (10) of the angle adjuster (5) through an inhaul cable mechanism (9), and the chair back quick-turning button (8) is rotated to drive the cam connecting shaft (10) so as to enable the swing support (7) of the angle adjuster (5) to turn over quickly. According to the office chair, the one-key quick-turning switch is arranged at the top of the chair back, so that the probability of misoperation is reduced, and meanwhile, the reliability of the switch is also improved.

Description

Technical Field

[0001] This utility model relates to the field of office and home furniture technology, specifically an office chair with a linked backrest and seat. Background Technology

[0002] A one-button seat adjustment device is currently disclosed, installed on a car seat. The car seat includes a backrest frame and a base frame. The base frame is mounted on a vehicle body mounting bracket, and the backrest frame is hinged to the base frame. This one-button seat adjustment device includes an unlocking strap, a seat flip bracket, and a seat flip spring. The seat flip bracket is hinged to both sides of the base frame and fixedly connected to the vehicle body mounting bracket. The seat flip spring is located at the hinge point between the seat flip bracket and the base frame. The rear end of the base frame is connected to the vehicle body mounting bracket via a seat flip lock, and the unlocking strap is connected to the seat flip lock via an unlocking cable. Under normal conditions, the rear end of the base frame is connected to the vehicle body mounting bracket via the seat flip lock, and the car seat as a whole remains horizontal on the vehicle body mounting bracket. At this time, the base frame and the seat flip bracket are in a retracted state, while the seat flip spring is in a compressed state. When the unlocking strap is pulled, it unlocks the seat flip lock via the unlocking mechanism, releasing the lock from the rear end of the base frame. With the rear end of the base frame released, the seat flip spring, which has been compressed and accumulated significant elastic potential energy, pushes the base frame outwards. This causes the base frame, along with the backrest frame, to flip and lift around the hinge between the seat flip bracket and the base frame. This displacement of the base and backrest frames, both horizontally and vertically, moves them away from the rear seats, creating more space for passengers to enter and exit. However, this seat adjustment mechanism has the following drawbacks: Since the seat flip is driven by the exposed unlocking strap, it is prone to accidental operation and poses a safety hazard. Furthermore, the uneven force distribution on both sides due to the unlocking strap reduces reliability. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an office chair with a backrest and seat linkage that sets the one-button quick flip switch at the top of the chair back, thereby reducing the probability of accidental operation and increasing the reliability of the switch.

[0004] The technical solution of this utility model is to provide an office chair with a linked backrest and seat, comprising a seat, a backrest, a headrest, two armrests, and a base; the seat includes an inner frame and a seat filling block, the backrest includes an inner frame and a backrest filling block, and the inner frames of the seat and backrest are respectively provided with symmetrical angle adjusters on the left and right sides, the angle adjusters including a fixed bracket and a swing bracket, the fixed bracket being fixed to the inner frame of the seat, and the swing bracket being fixed to the inner frame of the backrest; the feature is that: the backrest is provided with quick-flip buttons on both sides, the quick-flip buttons being connected to the cam connecting shaft of the angle adjuster through a cable mechanism, rotating the quick-flip buttons drives the cam connecting shaft to quickly flip the swing bracket of the angle adjuster.

[0005] The quick-flip button for the chair back is equipped with a rotating block and a positioning plate. The outer wall of the rotating block has a notch, and the positioning plate has a positioning groove. The inner cable connection end of the top of the cable mechanism passes through the positioning groove and is embedded in the notch. The outer sleeve of the top of the cable mechanism abuts against the positioning plate. Rotating the quick-flip button for the chair back will pull the inner cable at the top of the cable mechanism outward through the rotating block.

[0006] Both sides of the chair back are equipped with quick-flip buttons, and each quick-flip button is connected to the angle adjuster on the same side through a set of cable mechanisms.

[0007] The two sets of cable mechanisms are connected in an X-shape, with each set connected to a positioning block in the middle.

[0008] The fixed bracket is provided with a support block, and the support block is provided with a through hole. The internal cable at the bottom end of the cable mechanism passes through the through hole on the support block and is connected to the cam connecting shaft. The end face of the outer sleeve of the cable mechanism abuts against the support block.

[0009] The positioning plate is provided with a connecting end, the positioning groove passes through the connecting end and is arranged vertically, and the notch is eccentrically arranged on the outer wall of the rotating block.

[0010] With the above structure, this utility model has the following advantages: 1. The one-button quick-flip switch is located at the top of the chair back, thereby reducing the chance of accidental operation. Furthermore, the one-button quick-flip switch and the angle adjuster switch are separated vertically to prevent accidental operation that could cause the chair back to suddenly tilt to the bottom, thus ensuring user safety and reliability. 2. Only by simultaneously rotating the quick-flip buttons on both sides can the chair back be quickly and arbitrarily tilted at any angle, thus meeting the operator's needs.

[0011] As an improvement, the quick-flip button for the backrest is equipped with a rotating block and a positioning plate. The outer wall of the rotating block has a notch, and the positioning plate has a positioning groove. The inner cable connection end of the top of the cable mechanism passes through the positioning groove and is embedded in the notch. The outer sleeve of the top of the cable mechanism abuts against the positioning plate. Rotating the quick-flip button for the backrest pulls the inner cable at the top of the cable mechanism outward through the rotating block. The rotational motion of the quick-flip button for the backrest is converted into a linear pull on the cable mechanism through the rotating block, resulting in direct drive and good reliability.

[0012] As an improvement, the chair back is equipped with quick-flip buttons on both sides. Each quick-flip button is connected to the angle adjuster on the same side through a set of cable mechanisms. The chair back can be flipped quickly only when both quick-flip buttons are turned on at the same time, which increases the safety of operation.

[0013] As an improvement, the two sets of cable mechanisms are connected in an X-shape, with each set connected to a positioning block in the middle, so that the two sets of cable mechanisms are balanced when subjected to force at the same time.

[0014] As an improvement, the fixed bracket is provided with a support block, the support block is provided with a through hole, the internal cable at the bottom end of the cable mechanism passes through the through hole on the support block and is connected to the cam connecting shaft, and the end face of the outer sleeve of the cable mechanism abuts against the support block. This structure has a good positioning effect and ensures that the cable inside the cable can drive the cam connecting shaft. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the office chair of this utility model.

[0016] Figure 2 This is a schematic diagram of the three-dimensional internal frame of the office chair of this utility model.

[0017] Figure 3 This is a schematic diagram of the frame of the backrest of the office chair of this utility model.

[0018] Figure 4 This is a schematic diagram of the quick-flip button on the back of the office chair according to this utility model.

[0019] Figure 5 This is a schematic diagram showing the connection of the quick-flip button on the back of the office chair according to this utility model.

[0020] Figure 6 This is a schematic diagram of the angle adjuster for the office chair according to this utility model.

[0021] The diagram shows: 1. Seat, 2. Backrest, 3. Inner frame of the seat, 4. Inner frame of the backrest, 5. Adjuster, 6. Fixed bracket, 7. Swing bracket, 8. Quick-flip button for the backrest, 9. Cable mechanism, 10. Cam connecting shaft, 11. Rotating block, 12. Positioning plate, 13. Notch, 14. Positioning groove, 15. Positioning block, 16. Support block, 17. Connecting end. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] like Figure 1-6 As shown, the office chair with a linked seat and backrest of this utility model includes a seat 1, a backrest 2, a headrest, two armrests, and a base. The seat 1 includes an inner frame 3 and a seat filling block. The backrest 2 includes an inner frame 4 and a backrest filling block. The inner frame 3 of the seat and the inner frame 4 of the backrest are respectively provided with left and right symmetrical angle adjusters 5. The angle adjuster 5 includes a fixed bracket 6 and a swing bracket 7. The fixed bracket 6 is fixed to the inner frame 3 of the seat, and the swing bracket 7 is fixed to the inner frame 4 of the backrest.

[0024] The chair back 2 is provided with chair back quick flip buttons 8 on both sides. The chair back quick flip buttons 8 are connected to the cam connecting shaft 10 of the angle adjuster 5 through the cable mechanism 9. Rotating the chair back quick flip buttons 8 on both sides drives the cam connecting shaft 10 to make the swing bracket 7 of the angle adjuster 5 quickly flip. If only one chair back quick flip button 8 is rotated, the chair back cannot be rotated quickly, and the angle can only be adjusted slowly.

[0025] like Figure 4 As shown, the quick-flip button 8 for the chair back has a rotating block 11 and a positioning plate 12. The outer wall of the rotating block 11 has a notch 13, and the positioning plate 12 has a positioning groove 14. The notch 13 is eccentrically located on the outer wall of the rotating block 11. The inner cable connection end of the top of the cable mechanism 9 passes through the positioning groove 14 and is embedded in the notch 13. The outer sleeve of the top of the cable mechanism 9 abuts against the positioning plate 12. Rotating the quick-flip button 8 pulls the inner cable of the top of the cable mechanism 9 outward through the rotating block 11. During adjustment, the rotating block 11 can rotate, while the positioning plate 12 is fixed. The positioning plate 12 supports the outer sleeve of the cable mechanism 9. The cable mechanism 9 has an outer sleeve and an inner cable.

[0026] like Figure 3 and Figure 5As shown, both sides of the chair back 2 are equipped with quick-flip buttons 8, and each quick-flip button 8 is connected to the angle adjuster 5 on the same side via a set of cable mechanisms 9. The two sets of cable mechanisms 9 are connected in an X-shape, with a positioning block 15 in the middle of each. This structure ensures that the two sets of cable mechanisms 9 are subjected to balanced force on both sides during adjustment, preventing deformation of one side due to cable pulling, and increasing reliability and durability.

[0027] like Figure 5 As shown, the fixed bracket 6 is provided with a support block 16, which has a through hole. The internal cable at the bottom end of the cable mechanism 9 passes through the through hole in the support block 16 and connects to the cam connecting shaft 10. The end face of the outer sleeve of the cable mechanism 9 abuts against the support block 16. The support block 16 serves to position the outer sleeve of the cable mechanism 9. The support block 16 is an L-shaped structure with a through hole on the horizontal plate. A groove is provided on the side of the through hole for the inner core of the cable mechanism 9 to pass through.

[0028] like Figure 4 As shown, the positioning plate 12 has a connecting end 17, which is located below the notch 13. The connecting end 17 is a column, and the positioning groove 14 passes through the connecting end 17 and is arranged vertically. The notch 13 is eccentrically located on the outer wall of the rotating block 11. During adjustment, rotating the rotating block 11 rotates counterclockwise and pulls the inner core of the cable upward, thereby pulling the cable at the other end to pull the cam connecting shaft 10, causing the cam to rotate.

Claims

1. An office chair with a linked seat and backrest, comprising a seat (1), a backrest (2), a headrest, two armrests, and a base; the seat (1) comprises an inner frame (3) and a seat filling block, the backrest (2) comprises an inner frame (4) and a backrest filling block, and the inner frame (3) and the inner frame (4) of the seat and the backrest are respectively provided with symmetrical angle adjusters (5), the angle adjusters (5) comprising a fixed bracket (6) and a swing bracket (7), the fixed bracket (6) being fixed to the inner frame (3) of the seat, and the swing bracket (7) being fixed to the inner frame (4) of the backrest; characterized in that: The backrest (2) is provided with backrest quick flip buttons (8) on both sides. The backrest quick flip buttons (8) are connected to the cam connecting shaft (10) of the angle adjuster (5) through the cable mechanism (9). Rotating the backrest quick flip buttons (8) drives the cam connecting shaft (10) to make the swing bracket (7) of the angle adjuster (5) flip quickly.

2. The office chair with a linked backrest and seat according to claim 1, characterized in that: The quick-flip button (8) for the backrest is provided with a rotating block (11) and a positioning plate (12). The outer wall of the rotating block (11) is provided with a notch (13). The positioning plate (12) is provided with a positioning groove (14). The inner cable connection end of the top of the cable mechanism (9) passes through the positioning groove (14) and is embedded in the notch (13). The outer sleeve of the top of the cable mechanism (9) abuts against the positioning plate (12). The quick-flip button (8) for the backrest is rotated and the inner cable of the top of the cable mechanism (9) is pulled outward through the rotating block (11).

3. An office chair with a linked backrest and seat according to claim 1, characterized in that: Both sides of the chair back (2) are provided with chair back quick flip buttons (8), and each chair back quick flip button (8) is connected to the angle adjuster (5) on the same side through a set of cable mechanism (9).

4. An office chair with a linked backrest and seat according to claim 3, characterized in that: The two sets of cable mechanisms (9) are connected in an X-shape, and each is connected to a positioning block (15) in the middle.

5. An office chair with a linked backrest and seat according to claim 1, characterized in that: The fixed bracket (6) is provided with a support block (16), the support block (16) is provided with a through hole, the inner cable at the bottom end of the cable mechanism (9) passes through the through hole on the support block (16) and is connected to the cam connecting shaft (10), and the end face of the outer sleeve of the cable mechanism (9) abuts against the support block (16).

6. An office chair with a linked backrest and seat according to claim 2, characterized in that: The positioning plate (12) is provided with a connecting end (17), the positioning groove (14) passes through the connecting end (17) and is arranged in the vertical direction, and the notch (13) is eccentrically arranged on the outer wall of the rotating block (11).

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