Manual office chair support

Abstract

The utility model discloses a manual office chair support which comprises chair legs, a first air pressure telescopic rod is vertically installed on the chair legs, a supporting beam is installed on the first air pressure telescopic rod, two ends of the supporting beam are respectively provided with a supporting side plate, the two supporting side plates are oppositely arranged, and a chair back supporting plate is rotatably connected between the rear ends of the two supporting side plates. A second air pressure telescopic rod is connected between the chair back supporting plate and the supporting beam; the first air pressure telescopic rod is provided with a first switch bolt extending upwards, and the second air pressure telescopic rod is provided with a second switch bolt extending forwards. An adjusting rocker is rotationally installed on the supporting beam, a pressing device is installed at one end of the adjusting rocker, a first rocking handle is arranged at the other end of the adjusting rocker, when the first rocking handle swings forwards, the adjusting rocker can drive the pressing device to press the first switch bolt, and when the first rocking handle swings backwards, the adjusting rocker can drive the pressing device to press the second switch bolt. The height of the seat cushion and the inclination angle of the chair back of the office chair can be manually adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of seats, in particular to a manual office chair bracket. Background Art

[0002] An office chair usually includes legs and a seat, backrest and other components installed on the legs. In the prior art, the structure of an office chair is usually relatively simple, and the positions of the seat and backrest are fixed. It is difficult to adjust the height of the seat and the inclination of the backrest according to the user's needs, resulting in certain limitations in use and bringing inconvenience to people's use.

[0003] Chinese patent document CN108185707A discloses an office chair, including a backrest, a seat cushion, a flexible connector, an armrest, a connecting block, a gas pressure lifting rod, a headrest, a base and a universal wheel, wherein the two ends of the gas pressure lifting rod are respectively connected to the base and the seat cushion, the adjustment handle is connected to the gas pressure lifting rod, and the armrests are arranged on both sides of the seat cushion; the seat cushion is connected to the backrest through a flexible connector, and the backrest is connected to the headrest through a connecting block. However, the patent document CN108185707A still has the following technical problems: first, the inclination of the backrest of the office chair can only be adjusted by bending the flexible connector, and cannot be directly adjusted to a certain inclination angle required by the user; second, the seat cushion of the office chair cannot be adjusted forward and backward. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a manual office chair bracket capable of manually adjusting the seat cushion height and the backrest tilt angle of the office chair in view of the deficiencies of the above-mentioned prior art.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a manual office chair bracket includes a chair foot, a first pneumatic telescopic rod is vertically installed on the chair foot, a support beam is installed on the first pneumatic telescopic rod, support side panels are respectively installed at both ends of the support beam, the two support side panels are arranged opposite to each other, a chair back support plate is rotatably connected between the rear ends of the two support side plates, and a second pneumatic telescopic rod is connected between the chair back support plate and the support beam; the first pneumatic telescopic rod is provided with a first switch bolt extending upward, and the second pneumatic telescopic rod is provided with a second switch bolt extending forward; an adjusting rocker is rotatably installed on the support beam, a pressing device is installed at one end of the adjusting rocker, and a first rocking handle is provided at the other end of the adjusting rocker. When the first rocking handle is rocked forward, the adjusting rocker can drive the pressing device to press the first switch bolt, and when the first rocking handle is rocked reversely, the adjusting rocker can drive the pressing device to press the second switch bolt.

[0006] Preferably, two first connecting plates are provided at the front middle part of the chair back support plate, and the rear end of the second pneumatic telescopic rod is installed between the two first connecting plates and rotatably connected to the two first connecting plates; the front end of the second pneumatic telescopic rod is fixedly connected with an adapter, and the adapter is provided with two second connecting plates; two third connecting plates are provided at the rear middle part of the support beam, and one end of the adjusting rocker can rotatably pass through the two second connecting plates and the two third connecting plates.

[0007] Preferably, the pressing device comprises a first pressing member and a second pressing member, wherein one end of the first pressing member is provided with a sleeve portion, which is rotatably mounted on the adjusting rocker, and the other end of the first pressing member is provided with a first pressing portion for pressing the first switch bolt; the second pressing member is located between the two second connecting pieces of the adapter and is fixedly connected to one end of the adjusting rocker, the front end of the second pressing member is provided with a second pressing portion for pressing the first pressing portion, and the rear end of the second pressing member is provided with a third pressing portion for pressing the second switch bolt. The pressing device further comprises a spring, which is provided between the third pressing portion and the middle portion of the adapter and is mounted outside the second switch bolt.

[0008] Preferably, a fourth connecting piece is further provided at the rear end of the support beam, and the sleeve portion rotatably passes through the fourth connecting piece.

[0009] Preferably, a first rotating shaft is provided between the supporting side plate and the chair back support plate, and a second rotating shaft is provided between the second pneumatic telescopic rod and the first connecting plate.

[0010] Preferably, the middle portion of the chair back support plate is a downwardly concave portion, and the concave portion is provided with a plurality of fixing holes for fixing the chair back.

[0011] Preferably, the manual office chair bracket also includes two seat cushion brackets for installing seat cushions, one seat cushion bracket is located above one supporting side panel, and the other seat cushion bracket is located above the other supporting side panel; two deflection plates are arranged between the seat cushion bracket and the supporting side panel, the seat cushion bracket is rotatably connected to one end of the deflection plate, and the supporting side panel is rotatably connected to the other end of the deflection plate, one of the deflection plates extends downward and is connected to a second crank handle, when the second crank handle is shaken forward, the deflection plate can drive the seat cushion bracket to move backward, and when the second crank handle is shaken reversely, the deflection plate can drive the seat cushion bracket to move forward.

[0012] Preferably, the chair legs are multi-claw type legs, disc-shaped legs or wheel-shaped legs.

[0013] The beneficial effect of the utility model is as follows: since the first pneumatic telescopic rod is vertically installed between the chair legs and the support beam, the second pneumatic telescopic rod is connected between the chair back support plate and the support beam, an adjusting rocker is rotatably installed on the support beam, a pressing device is installed at one end of the adjusting rocker, and a first rocking handle is provided at the other end of the adjusting rocker. When the first rocking handle is rocked forward, the adjusting rocker can drive the pressing device to press the first switch bolt, and when the first rocking handle is rocked reversely, the adjusting rocker can drive the pressing device to press the second switch bolt; therefore, the user can adjust the seat height and the chair back inclination angle of the office chair by rocking the first rocking handle forward or reversely. The specific adjustment method of the seat cushion height and the chair back tilt angle is as follows: (1) When the seat cushion height needs to be adjusted, the user first sits on the office chair, then shakes the first crank handle in the forward direction to press the first switch bolt to open, then the user uses the body weight to press down the seat cushion to compress the first gas pressure telescopic rod to lower the seat cushion height, or reduces the gravity pressing on the seat cushion so that the first gas pressure telescopic rod automatically extends under the action of the internal gas pressure to increase the seat cushion height, and finally, when the seat cushion height reaches a suitable position, release the first crank handle; (2) When the chair back tilt angle needs to be adjusted, the user first sits on the office chair, then shakes the first crank handle in the reverse direction to press the second switch bolt to open, then the user uses the thrust of the back of the body to push the chair back backward to compress the second gas pressure telescopic rod to tilt the chair back, or reduces the thrust pressing on the chair back so that the second gas pressure telescopic rod automatically extends under the action of the internal gas pressure to erect the chair back forward, and finally, when the chair back tilt angle reaches a suitable position, release the second crank handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the overall structure diagram of the utility model.

[0015] Figure 2 It is a cross-sectional structural diagram of the utility model.

[0016] Figure 3 for Figure 2 A partial enlarged view of part A. DETAILED DESCRIPTION

[0017] The structural principle and working principle of the utility model are further described in detail below with reference to the accompanying drawings.

[0018] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear" and the like indicate directions or positional relationships based on the attached Figure 1-3As shown in the orientation or position relationship, the "front end" of the manual office chair bracket refers to the end away from the chair back support plate, and the "rear end" of the manual office chair bracket refers to the end close to the chair back support plate. The above terms are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0019] like Figure 1-Figure 3 As shown, the utility model is a manual office chair bracket, including a chair foot 1, a first pneumatic telescopic rod 2 is vertically installed on the chair foot 1, a support beam 3 is installed on the first pneumatic telescopic rod 2, and support side panels 4 are respectively installed at both ends of the support beam 3. The two support side panels 4 are arranged opposite to each other, and a backrest support plate 5 is rotatably connected between the rear ends of the two support side panels 4. A second pneumatic telescopic rod 6 is connected between the backrest support plate 5 and the support beam 3; the first pneumatic telescopic rod 2 is provided with a first switch bolt 7 extending upward, and the second pneumatic telescopic rod 6 is provided with a second switch bolt 8 extending forward; the support beam 3 is rotatably connected to the backrest support plate 5, and the second pneumatic telescopic rod 6 is provided with a second switch bolt 8 extending forward. An adjusting rocker 9 is installed in a movable manner, a pressing device 11 is installed at one end of the adjusting rocker 9, and a first rocker handle 10 is provided at the other end of the adjusting rocker arm 9. When the first rocker handle 10 is rocked in the forward direction, the adjusting rocker arm 9 can drive the pressing device 11 to press the first switch bolt 7; when the first rocker handle 10 is rocked in the reverse direction, the adjusting rocker arm 9 can drive the pressing device 11 to press the second switch bolt 8; it should be noted that, in this embodiment, the forward rocking refers to the forward rocking, and the reverse rocking refers to the backward rocking; the first pneumatic telescopic rod and the second pneumatic telescopic rod both adopt the pneumatic telescopic rod commonly used in the prior art.

[0020] The specific method for adjusting the seat cushion height and the chair back tilt angle of the utility model is as follows: (1) When the seat cushion height needs to be adjusted, the user first sits on the office chair, and then shakes the first crank handle 10 in a positive direction to press the first switch bolt 7 to open. Then, the user uses the body weight to press down the seat cushion to compress the first gas pressure telescopic rod 2 to lower the seat cushion height, or reduces the gravity pressing on the seat cushion so that the first gas pressure telescopic rod 2 automatically extends under the action of the internal gas pressure to increase the seat cushion height. Finally, when the seat cushion height reaches a suitable position, , release the first crank 10; (2) when the backrest tilt angle needs to be adjusted, the user first sits on the office chair, then shakes the first crank 10 in the opposite direction to press the second switch bolt 8 to open, then the user uses the thrust of the back of the body to push the backrest backward to compress the second pneumatic telescopic rod 6, so that the backrest tilts backward, or reduces the thrust on the backrest so that the second pneumatic telescopic rod 6 automatically extends under the action of the internal air pressure, so that the backrest stands up forward, and finally, when the backrest tilt angle reaches a suitable position, release the second crank. It can be seen that the user can adjust the seat height and backrest tilt angle of the office chair by shaking the first crank 10 in the forward or reverse direction.

[0021] like Figure 1-Figure 3 As shown, two first connecting pieces 12 are provided at the front middle part of the chair back support plate 5, and the rear end of the second pneumatic telescopic rod 6 is installed between the two first connecting pieces 12 and is rotatably connected to the two first connecting pieces 12; the front end of the second pneumatic telescopic rod 6 is fixedly connected with an adapter 13, and the adapter 13 is provided with two second connecting pieces 131; two third connecting pieces 14 are provided at the rear middle part of the support beam 3, and one end of the adjusting rocker 9 can rotatably pass through the two second connecting pieces 131 and the two third connecting pieces 14.

[0022] like Figure 1-Figure 3 As shown, the pressing device 11 includes a first pressing member 15 and a second pressing member 16. One end of the first pressing member 15 is provided with a sleeve portion 151, which is rotatably mounted on the adjusting rocker 9. The other end of the first pressing member 15 is provided with a first pressing portion 152 for pressing the first switch bolt 7. The second pressing member 16 is located between the two second connecting pieces of the adapter 13 and is fixedly connected to one end of the adjusting rocker 9. The front end of the second pressing member 16 is provided with a second pressing portion 161 for pressing the first pressing portion 152, and the rear end of the second pressing member 16 is provided with a third pressing portion 162 for pressing the second switch bolt 8. The pressing device 11 also includes a spring 17, which is provided between the third pressing portion 162 and the middle part of the adapter 13 and is mounted outside the second switch bolt 8. The rear end of the support beam 3 is also provided with a fourth connecting piece 18, and the sleeve portion 151 is rotatably passed through the fourth connecting piece 18. There is a first rotating shaft between the supporting side plate 4 and the backrest support plate 5, and there is a second rotating shaft between the second pneumatic telescopic rod 6 and the first connecting plate 12. When the first crank 10 is shaken in the forward direction, the adjusting rocker 9 drives the second pressing member 16 to rotate counterclockwise, and the second pressing portion 161 of the second pressing member 16 presses down the first pressing portion 152 of the first pressing member 15, and the first pressing portion 152 then presses down the first switch bolt 7; when the first crank 10 is shaken in the reverse direction, the adjusting rocker 9 drives the second pressing member 16 to rotate clockwise, and the third pressing portion 162 of the second pressing member 16 presses down the second switch bolt 8.

[0023] like Figure 1 As shown, the middle part of the backrest support plate 5 is concave downwardly formed with a concave portion 19, and the concave portion 19 is provided with a plurality of fixing holes 20 for fixing the backrest (not shown). By providing the concave portion 19 and the fixing holes 20, the backrest can be stably supported and fixed.

[0024] like Figure 1 and Figure 2As shown, the manual office chair bracket also includes two cushion brackets 21 for installing cushions (not shown), one of which is located above one supporting side plate 4, and the other is located above the other supporting side plate 4; two deflection plates 22 are arranged between the cushion bracket 21 and the supporting side plate 4, the cushion bracket 21 is rotatably connected to one end of the deflection plate 22, and the supporting side plate 4 is rotatably connected to the other end of the deflection plate 22, one of which extends downward and is connected to a second crank 23, when the second crank 23 is shaken forward, the deflection plate 22 can drive the cushion bracket 21 to move backward, and when the second crank 23 is shaken in the reverse direction, the deflection plate 22 can drive the cushion bracket 21 to move forward. Since the two cushion brackets 21 are used to install cushions, the cushion can be controlled to move forward and backward by manually controlling the cushion bracket 21 to move forward and backward.

[0025] As a preferred embodiment of the present invention, the chair leg 1 is a multi-claw chair leg, a disc-shaped chair leg or a wheel-shaped chair leg.

[0026] The above is only a preferred embodiment of the present invention. Any slight modification, equivalent changes and modifications made to the above embodiments according to the technical solution of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A manual office chair bracket, characterized in that: The chair comprises a chair foot, on which a first pneumatic telescopic rod is vertically installed, on which a support beam is installed, and on both ends of the support beam support side panels are respectively installed, the two support side panels are arranged opposite to each other, a backrest support panel is rotatably connected between the rear ends of the two support side panels, and a second pneumatic telescopic rod is connected between the backrest support panel and the support beam; the first pneumatic telescopic rod is provided with a first switch bolt extending upward, and the second pneumatic telescopic rod is provided with a second switch bolt extending forward; an adjusting rocker is rotatably installed on the support beam, a pressing device is installed at one end of the adjusting rocker, and a first rocking handle is provided at the other end of the adjusting rocker, when the first rocking handle is rocked forward, the adjusting rocker can drive the pressing device to press the first switch bolt, and when the first rocking handle is rocked reversely, the adjusting rocker can drive the pressing device to press the second switch bolt.

2. The manual office chair bracket according to claim 1, characterized in that: Two first connecting plates are provided at the front middle part of the chair back support plate, and the rear end of the second pneumatic telescopic rod is installed between the two first connecting plates and is rotatably connected to the two first connecting plates; the front end of the second pneumatic telescopic rod is fixedly connected to an adapter, and the adapter is provided with two second connecting plates; two third connecting plates are provided at the rear middle part of the support beam, and one end of the adjusting rocker can rotatably pass through the two second connecting plates and the two third connecting plates.

3. The manual office chair bracket according to claim 2, characterized in that: The pressing device includes a first pressing member and a second pressing member, wherein a sleeve portion is provided at one end of the first pressing member, and the sleeve portion can be rotatably mounted on the adjusting rocker, and a first pressing portion for pressing the first switch bolt is provided at the other end of the first pressing member; the second pressing member is located between two second connecting pieces of the adapter and is fixedly connected to one end of the adjusting rocker, a second pressing portion for pressing the first pressing portion is provided at the front end of the second pressing member, and a third pressing portion for pressing the second switch bolt is provided at the rear end of the second pressing member.

4. The manual office chair bracket according to claim 3, characterized in that: The pressing device further comprises a spring, which is arranged between the third pressing portion and the middle portion of the adapter and is sleeved outside the second switch bolt.

5. The manual office chair bracket according to claim 3, characterized in that: A fourth connecting piece is also provided at the rear end of the support beam, and the sleeve portion rotatably passes through the fourth connecting piece.

6. The manual office chair bracket according to claim 2, characterized in that: A first rotating shaft is provided between the supporting side plate and the chair back support plate, and a second rotating shaft is provided between the second pneumatic telescopic rod and the first connecting plate.

7. The manual office chair bracket according to claim 1, characterized in that: The middle part of the chair back support plate is a concave portion which is concave downwards, and the concave portion is provided with a plurality of fixing holes for fixing the chair back.

8. The manual office chair bracket according to claim 1, characterized in that: It also includes two seat cushion brackets for installing seat cushions, one of which is located above one supporting side panel, and the other seat cushion bracket is located above the other supporting side panel; two deflection plates are arranged between the seat cushion bracket and the supporting side panel, the seat cushion bracket is rotatably connected to one end of the deflection plate, and the supporting side panel is rotatably connected to the other end of the deflection plate, one of the deflection plates extends downward and is connected to a second rocker handle, when the second rocker handle is rocked forward, the deflection plate can drive the seat cushion bracket to move backward, and when the second rocker handle is rocked reversely, the deflection plate can drive the seat cushion bracket to move forward.

9. The manual office chair bracket according to claim 1, characterized in that: The chair legs are multi-claw type chair legs, disc-shaped chair legs or wheel-shaped chair legs.

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