Office chair

Abstract

The utility model discloses an office chair which comprises a chair seat (1), a chair back (2), a headrest (3), left and right armrests (4) and a base (5), and the chair seat (1) comprises a first supporting plate (7), a second supporting plate (8), a first seat cushion (9), a second seat cushion (10), an inclination angle adjusting mechanism (11) and a chair seat filling block (15); the first supporting plate (7) is a fixed end and connected with the fixed end of the angle adjusting structure, the second supporting plate (8) is a swing end, the inner side of the second supporting plate (8) is hinged to the outer side edge of the first supporting plate (7), the bottom of the dip angle adjusting mechanism (11) is fixed to the base (5), and the top of the dip angle adjusting mechanism (11) is connected with the first supporting plate (7) and the second supporting plate (8) at the same time. The base of the chair seat of the office chair adopts a split structure, the fixed end of the base increases the strength, and the swing end of the base adjusts the inclination angle of the chair seat, so that the inclination angle can be adjusted while the strength of the chair seat is ensured, the structure is simple, and the reliability is good.

Description

Technical Field

[0001] This utility model relates to the field of office furniture technology, specifically an office chair. Background Technology

[0002] Currently, a structure for an office chair with an adjustable seat cushion tilt angle is disclosed. This structure includes a seat cushion, the lower surface of which is connected to a seat base. Multiple casters are located at the bottom of the seat base. A seat back is located at the rear of the seat cushion. The seat cushion includes an upper component and a lower component. The rear of the upper component and the rear of the lower component are hinged together. A telescopic cylinder is movably mounted on the upper surface of the lower component. The cylinder body is hinged to a cylinder mounting seat on the upper surface of the lower component. The adjusting component is cylindrical, with its side fixedly connected to the front end of the telescopic rod of the telescopic cylinder. The adjusting component is clamped between the upper and lower components, with its upper side against the lower surface of the upper component and its lower side against the upper surface of the lower component. The telescopic cylinder is connected to a control component that controls its extension and retraction. The front of the upper component and the front of the lower component are connected by a limiting spring. The office chair uses a cylinder to extend and retract to push components on the seat cushion, allowing the chair to be tilted. This structure takes up internal space in the chair and is complex, which reduces its reliability.

[0003] An adjustable office chair mechanism is also disclosed, comprising: a chassis; a seat frame mounted on the chassis; a joist hinged to one end of the chassis; a backrest frame slidably mounted on the joist; a linkage adjustment mechanism mounted on the lower end of the chassis for connecting the seat frame and the joist and controlling the linkage between the seat frame and the joist; and a chair leg mechanism mounted below the linkage adjustment mechanism for supporting the office chair. In the adjustable office chair mechanism, the linkage adjustment mechanism comprises: a fixed frame fixedly mounted on the lower end of the chassis; a rocker arm hinged to one end of the fixed frame for driving the linkage adjustment; two chassis support rods hinged to the other end of the fixed frame for driven linkage adjustment; a connecting frame hinged at both ends to the rocker arm and the chassis support rods respectively; and two joist support rods hinged at both ends to the chassis support rods and the joist for supporting and lowering the joist. The mechanism uses a multi-link structure to adjust the tilt angle, which takes up space at the bottom and back, making the office chair appear too bulky and also affecting the connection strength between the seat and the base. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide an office chair with a split structure for the base of the chair seat, with the fixed end of the base having increased strength and the swing end of the base adjusting the tilt angle of the chair seat, so as to achieve tilt angle adjustment while ensuring the strength of the chair seat, and with a simple structure and good reliability.

[0005] The technical solution of this utility model is to provide an office chair with the following structure, including a seat, a backrest, a headrest, left and right armrests, and a base. The left and right armrests are located on both sides of the seat, and the base is located at the bottom of the seat. The headrest is located at the top of the backrest, and the two are an integral structure. An angle adjustment structure is provided on the backrest and the seat for adjusting the tilt angle of the backrest. The seat includes a first support plate, a second support plate, a first seat cushion, a second seat cushion, a tilt adjustment mechanism, and a seat filling block. The first support plate is a fixed end and is connected to the fixed end of the angle adjustment structure. The second support plate is a swing end and its inner side is hinged to the outer side of the first support plate. The bottom of the tilt adjustment mechanism is fixed to the base, and its top is connected to both the first and second support plates. The first seat cushion is located on the top of the first support plate, and the second seat cushion is located on the top of the second support plate. The connection between the first and second seat cushions has a swing gap, and the two are spliced ​​together to form the shape of a seat. The seat filling block covers the top of the first and second seat cushions.

[0006] The tilt adjustment mechanism includes a first connecting arm, a second connecting arm, and a third connecting arm. The first connecting arm is fixed to a first support plate. One end of the second connecting arm is rotatably connected to one end of the first connecting arm and is provided with a first locking structure. The two arms form an arc shape when connected. The other end of the second connecting arm is rotatably connected to one end of the third connecting arm and is provided with a second locking structure. The other end of the third connecting arm is connected to a second support plate. During adjustment, the tilt angle of the second support plate is adjusted by loosening the first and second locking structures.

[0007] The second support plate has a through hole. The end of the third connecting arm rotates by passing a screw through the through hole of the second support plate. At the other end of the through hole is a nut. Tightening the nut locks the connection, while loosening the bolt allows for rotation and adjustment.

[0008] The connecting sides of the first support plate and the second support plate are interlocking sawtooth ends. Each sawtooth end is provided with a coaxial shaft hole, and a hinge shaft is provided in the shaft hole. The first support plate and the second support plate rotate around the hinge shaft.

[0009] Both the fixed end and the swing end of the angle adjustment structure are covered by a shell.

[0010] The chair back is provided with a ventilation hole, and a front cover and a rear cover are provided inside the ventilation hole. The front cover is installed on the front of the ventilation hole of the chair back, and the rear cover is installed on the back of the ventilation hole of the chair back.

[0011] The second connecting arm has arc-shaped grooves on both sides for adjusting the connection position with the first connecting arm.

[0012] With the above structure, this utility model has the following advantages: The chair seat includes a first support plate, a second support plate, a first seat cushion, a second seat cushion, a tilt adjustment mechanism, and a seat filling block; the first support plate is a fixed end and is connected to the fixed end of the angle adjustment structure, and the second support plate is a swing end and its inner side is hinged to the outer side of the first support plate. That is, the chair seat is connected by two support plates, allowing the second support plate at the swing end to swing around the first support plate at the fixed end, providing a swing mechanism. The first support plate is fixedly connected to the angle adjustment structure, forming a stable foundation, and the second support plate achieves swinging around an axis through its inner hinge point. The double support plate structure significantly reduces the overall thickness while ensuring support strength. Furthermore, since the bottom of the tilt adjustment mechanism is fixed to the base, and the top is connected to both the first and second support plates, the tilt adjustment mechanism can adjust the tilt angle of the second support plate and its positioning after adjustment. The first seat cushion is located on top of the first support plate, and the second seat cushion is located on top of the second support plate. A swing gap is provided at the connection between the first and second seat cushions, and the two cushions, when joined together, form the shape of a seat. The seat filling block covers the top of the first and second seat cushions. Adjusting the tilt angle does not affect the normal assembly of the first and second seat cushions and the seat filling block. This seat structure is simple, occupies little space, and has good reliability.

[0013] As an improvement, the tilt adjustment mechanism includes a first connecting arm, a second connecting arm, and a third connecting arm. The first connecting arm is fixed to the first support plate. One end of the second connecting arm is rotatably connected to one end of the first connecting arm and is provided with a first locking structure. The two are connected in an arc shape. The other end of the second connecting arm is rotatably connected to one end of the third connecting arm and is provided with a second locking structure. The other end of the third connecting arm is connected to the second support plate. During adjustment, the tilt angle of the second support plate is adjusted after the first and second locking structures are released. The angle adjustment is achieved through multiple swing arms, which can sufficiently ensure the connection strength of the chair seat while satisfying the adjustment function.

[0014] As an improvement, the second support plate is provided with a through hole, and the end of the third connecting arm rotates by passing through the through hole of the second support plate with a screw. At the other end of the through hole is a nut. Tightening the nut achieves locking, and loosening the bolt achieves rotation and adjustment. It can both rotate and lock, and has good reliability.

[0015] As an improvement, the connecting sides of the first support plate and the second support plate are interlocking sawtooth ends. Each sawtooth end is provided with a coaxial shaft hole, and a hinge shaft is provided in the shaft hole. The first support plate and the second support plate rotate around the hinge shaft, which can ensure that the two are engaged. Moreover, with the long-term use of the seat, there is a large tolerance for slight deformation.

[0016] As an improvement, both the fixed end and the swing end of the angle adjustment structure are covered with a shell, which increases the overall integrity of the office chair.

[0017] As an improvement, the chair back is provided with a ventilation hole, and a front cover and a rear cover are provided inside the ventilation hole. The front cover is installed on the front of the ventilation hole of the chair back, and the rear cover is installed on the back of the ventilation hole of the chair back, which can cover the side wall of the ventilation hole.

[0018] As an improvement, the two side walls of the second connecting arm are provided with arc-shaped grooves for adjusting the connection position with the first connecting arm, thereby further increasing the adjustment range of both. Attached Figure Description

[0019] Figure 1 This is a three-dimensional front view of the office chair of this utility model.

[0020] Figure 2 This is a three-dimensional schematic diagram of the back of the office chair of this utility model.

[0021] Figure 3 This is a schematic diagram of the split components of the office chair of this utility model.

[0022] Figure 4 This is a schematic diagram showing the connection between the first support plate and the second support plate of this utility model.

[0023] Figure 5 This is an exploded view of the first support plate, the second support plate, and the tilt adjustment mechanism of this utility model.

[0024] Figure 6 This is a schematic diagram showing the connection between the first support plate, the second support plate, and the tilt adjustment mechanism of this utility model.

[0025] Figure 7 This is a schematic diagram of the tilt adjustment mechanism of this utility model.

[0026] Figure 8 This is a schematic diagram of the seat of the office chair according to the present invention.

[0027] As shown in the figure:

[0028] 1. Seat, 2. Backrest, 3. Headrest, 4. Left and right armrests, 5. Base, 7. First support plate, 8. Second support plate, 9. First seat cushion, 10. Second seat cushion, 11. Tilt adjustment mechanism, 12. First connecting arm, 13. Second connecting arm, 14. Third connecting arm, 15. Seat filling block, 16. Hinge shaft, 17. Serrated end, 18. Front cover, 19. Rear cover, 20. Arc groove. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] like Figure 1-8 As shown, the office chair of this utility model includes a seat 1, a backrest 2, a headrest 3, left and right armrests 4 and a base 5. The left and right armrests 4 are located on both sides of the seat 1, and the base 5 is located at the bottom of the seat 1. The headrest 3 is located at the top of the backrest 2 and the two are integrated. A cushion can also be provided on the front of the headrest 3 to make the person sitting more comfortable.

[0031] The chair back 2 and seat 1 are equipped with angle adjustment structures for adjusting the tilt angle of the chair back 2. Both the fixed end and the swing end of the angle adjustment structure are covered by a shell, while the knob of the angle adjustment structure is exposed for easy operation and adjustment by the seated person.

[0032] like Figure 4-8 As shown, the chair seat 1 includes a first support plate 7, a second support plate 8, a first seat cushion 9, a second seat cushion 10, a tilt adjustment mechanism 11, and a seat filling block 15. The first support plate 7 and the second support plate 8 are joined to form a base, which is approximately the same size as the chair seat, or slightly smaller. The connection between the first seat cushion 9 and the second seat cushion 10 has a swing gap, and the two, when joined, form the shape of a seat. The first seat cushion 9 and the second seat cushion 10 possess a certain degree of elasticity.

[0033] The first support plate 7 is a fixed end and is connected to the fixed end of the angle adjustment structure. The second support plate 8 is a swing end and its inner side is hinged to the outer side of the first support plate 7, that is, the inner side of the second support plate 8 swings around the outer side of the first support plate 7.

[0034] The bottom of the tilt adjustment mechanism 11 is fixed to the base 5, and the top is connected to the first support plate 7 and the second support plate 8. The first seat cushion 9 is located on the top of the first support plate 7, and the second seat cushion 10 is located on the top of the second support plate 8. The connection between the first seat cushion 9 and the second seat cushion 10 is provided with a swing gap, and the two are spliced ​​together to form the shape of a seat. The seat filling block 15 covers the top of the first seat cushion 9 and the second seat cushion 10.

[0035] The tilt adjustment mechanism 11 includes a first connecting arm 12, a second connecting arm 13, and a third connecting arm 14. The first connecting arm 12 is fixed to the first support plate 7. One end of the second connecting arm 13 is rotatably connected to one end of the first connecting arm 12 and is provided with a first locking structure. The two arms form an arc-shaped structure after connection. Arc-shaped grooves 20 are provided on both side walls of the second connecting arm 13 for adjusting the connection position with the first connecting arm 12. A screw on the first connecting arm 12 passes through the arc-shaped groove, thereby adjusting the angle and position. After adjustment, the screw is locked to fix the first connecting arm 12 and the second connecting arm 13.

[0036] The first connecting arm 12 and the second connecting arm 13 are curved.

[0037] The other end of the second connecting arm 13 is rotatably connected to one end of the third connecting arm 14 and is provided with a second locking structure. The other end of the third connecting arm 14 is connected to the second support plate 8. During adjustment, the first locking structure and the second locking structure are released and the tilt angle of the second support plate 8 is adjusted.

[0038] In this embodiment, both the first and second locking structures are bolted connections. The connecting ends of the first connecting arm 12, the second connecting arm 13, and the third connecting arm 14 are all in two sets, one on the left and one on the right, further increasing stability and connection strength.

[0039] The second support plate 8 is provided with a through hole. The end of the third connecting arm 14 rotates by passing through the through hole of the second support plate 8 with a screw. At the other end of the through hole is a nut. Tightening the nut achieves locking, and loosening the bolt achieves rotation and adjustment.

[0040] like Figure 5 As shown, the connecting sides of the first support plate 7 and the second support plate 8 are interlocking sawtooth ends 17. Each sawtooth end 17 is provided with a coaxial shaft hole, and a hinge shaft 16 is provided in the shaft hole. The first support plate 7 and the second support plate 8 rotate around the hinge shaft 16.

[0041] like Figure 3 As shown, the chair back 2 is provided with a ventilation hole, and a front cover 18 and a rear cover 19 are provided in the ventilation hole. The front cover 18 is installed on the front of the ventilation hole of the chair back 2, and the rear cover 19 is installed on the back of the ventilation hole of the chair back 2.

Claims

1. An office chair, comprising a seat (1), a backrest (2), a headrest (3), left and right armrests (4) and a base (5), the left and right armrests (4) being arranged on both sides of the seat (1), and the base (5) being arranged at the bottom of the seat (1); the headrest (3) is arranged at the top of the backrest (2) and both are of an integrated structure; the backrest (2) and the seat (1) are provided with an angle adjusting structure for adjusting the inclination angle of the backrest (2). characterized in that The seat (1) comprises a first support plate (7), a second support plate (8), a first seat cushion (9), a second seat cushion (10), an inclination angle adjusting mechanism (11) and a seat filling block (15); the first support plate (7) is a fixed end and is connected with the fixed end of the angle adjusting structure, the second support plate (8) is a swing end and is hingedly connected with the outer side of the first support plate (7), the inclination angle adjusting mechanism (11) is fixed at the bottom and connected with the first support plate (7) and the second support plate (8) at the top, the first seat cushion (9) is arranged at the top of the first support plate (7), the second seat cushion (10) is arranged at the top of the second support plate (8), a gap is arranged at the connection between the first seat cushion (9) and the second seat cushion (10), and the seat is formed after the two are spliced, and the seat filling block (15) is arranged on the top of the first seat cushion (9) and the second seat cushion (10).

2. The office chair of claim 1, wherein: The inclination angle adjusting mechanism (11) comprises a first connecting arm (12), a second connecting arm (13) and a third connecting arm (14); the first connecting arm (12) is fixed with the first support plate (7), one end of the second connecting arm (13) is rotatably connected with one end of the first connecting arm (12) and is provided with a first locking structure, and both are in an arc shape after being connected, the other end of the second connecting arm (13) is rotatably connected with one end of the third connecting arm (14) and is provided with a second locking structure, and the other end of the third connecting arm (14) is connected with the second support plate (8); when adjusting, the inclination angle of the second support plate (8) is adjusted after the first locking structure and the second locking structure are loosened.

3. The office chair of claim 2, wherein: The second support plate (8) is provided with a through hole, the end of the third connecting arm (14) is rotatable through the through hole of the second support plate (8) by a screw rod, and the other end of the through hole is a nut; the nut is tightened to realize locking, and the bolt is loosened to realize rotation and adjustment.

4. The office chair of claim 2, wherein: The connecting sides of the first support plate (7) and the second support plate (8) are intermeshing sawtooth ends (17), each sawtooth end (17) is provided with an axis hole, a hinge shaft (16) is arranged in the axis hole, and the first support plate (7) and the second support plate (8) rotate around the hinge shaft (16).

5. The office chair of claim 1, wherein: The fixed end and the swing end of the angle adjusting structure are both covered by a shell.

6. The office chair of claim 1, wherein: The backrest (2) is provided with a ventilation hole, the ventilation hole is provided with a front cover (18) and a rear cover (19), the front cover (18) is arranged on the front surface of the ventilation hole of the backrest (2), and the rear cover (19) is arranged on the back surface of the ventilation hole of the backrest (2).

7. The office chair of claim 2 or 4, wherein: Two side walls of the second connecting arm (13) are provided with arc-shaped grooves (20) for adjusting the connecting position with the first connecting arm (12).

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