Human engineering chair

Abstract

The utility model relates to the technical field of human engineering chairs, and discloses a human engineering chair which comprises a fixing frame, a cushion is installed on the top of the fixing frame, a plurality of moving wheels are installed at the bottom of the fixing frame, a sliding rod is installed on the fixing frame in a sliding mode, and a connecting piece is arranged at the bottom end of the sliding rod. The bottom end of the connecting piece is connected with a pressing block, an adjusting assembly is arranged on the fixing frame, and a driving assembly is further arranged on the fixing frame. The movable wheels are locked through the self-locking function, the handle is rotated to drive the threaded rod, the sliding rod and the pressing block to move, the position of the chair can be fixed, when the pressing block makes contact with the ground and is squeezed by the spring, the generated friction force can make the fixing frame more stable on the ground, and the safety of the chair is improved. The chair is prevented from sliding in the use process, and the stability of the human engineering chair is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ergonomic chairs, in particular to an ergonomic chair. Background Art

[0002] An ergonomic chair is an office chair designed in accordance with ergonomic principles to provide comfortable and healthy sitting support and reduce the discomfort and fatigue caused by long-term sitting.

[0003] Ergonomic chairs are generally equipped with moving wheels for the movement of the ergonomic chair, and the moving wheels have a self-locking function, which can fix the ergonomic chair. Although the moving wheels are locked, on smooth floors such as tiles, even if they cannot rotate, the wheels are still easy to slide due to external forces. When the user leans on the backrest of the chair and pushes the ground, the force applied to the chair may cause the chair to slide on the ground, resulting in accidental movement. If the chair slides accidentally during use, it may cause injury to the user, especially in a working environment, such as an office or laboratory, which may affect work efficiency and safety.

[0004] Therefore, it is necessary to design an ergonomic chair to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and provides an ergonomic chair.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An ergonomic chair comprises a fixed frame, a seat cushion is installed on the top of the fixed frame, a plurality of movable wheels are installed on the bottom of the fixed frame, a sliding rod is slidably installed on the fixed frame, a connecting piece is provided at the bottom end of the sliding rod, a pressing block is connected to the bottom end of the connecting piece, an adjusting component is provided on the fixed frame, and a driving component is also provided on the fixed frame.

[0008] As a preferred technical solution of the utility model, the adjustment assembly includes a threaded rod, a threaded groove, two limit grooves and two limit blocks. The threaded rod is rotatably mounted on a fixed frame. The threaded groove is opened at the top of the sliding rod, and the threaded groove is threadedly sleeved on the threaded rod. The two limit grooves are both opened on the fixed frame, the two limit blocks are both fixed on the sliding rod, and the two limit blocks are respectively slidably connected in the two limit grooves.

[0009] As a preferred technical solution of the utility model, the driving assembly includes a bracket, a rotating shaft, two first bevel gears, two second bevel gears and a handle, the bracket is fixed on a fixed frame, the rotating shaft is rotatably mounted on the bracket, and the handle is rotatably mounted on the fixed frame, one of the first bevel gears is fixed to one end of the rotating shaft, another of the first bevel gears is fixed to the handle, one of the second bevel gears is fixed to the other end of the rotating shaft, and another of the second bevel gears is fixed to a threaded rod, the two first bevel gears are meshed with each other, and the two second bevel gears are meshed with each other.

[0010] As a preferred technical solution of the utility model, the connecting member includes an outer cylinder, an inner rod and a spring. The outer cylinder is fixed to the bottom end of the sliding rod, the inner rod is slidably connected in the outer cylinder, the bottom end of the inner rod extends to the outside of the outer cylinder and is fixedly connected to the clamping block, and the spring is installed between the outer cylinder and the inner rod.

[0011] As a preferred technical solution of the utility model, the outer surface of the sliding rod and the fixing frame are in contact with each other.

[0012] As a preferred technical solution of the utility model, an anti-slip pad is bonded to the bottom surface of the pressing block.

[0013] The utility model has the following beneficial effects:

[0014] The position of the chair can be fixed by utilizing the self-locking function to lock the moving wheels and turning the handle to drive the movement of the threaded rod, the sliding rod and the clamping block. When the clamping block contacts the ground and is squeezed by the spring, the friction force generated can make the fixing frame more stable on the ground, preventing the chair from sliding during use, thereby improving the stability of the ergonomic chair. After the chair is firmly fixed, the user will feel more stable support when sitting on the chair, which improves the comfort of use and reduces the feeling of instability during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional structural schematic diagram of an ergonomic chair proposed by the utility model;

[0016] Figure 2 This is a schematic cross-sectional view of an ergonomic chair proposed by the utility model;

[0017] Figure 3 for Figure 2 A magnified view of the structure at A;

[0018] Figure 4 for Figure 2 Enlarged view of the structure at B.

[0019] In the figure: 1 fixed frame, 2 cushion, 3 moving wheel, 4 sliding rod, 5 connecting piece, 6 clamping block, 71 threaded rod, 72 thread groove, 73 limit groove, 74 limit block, 81 bracket, 82 rotating shaft, 83 first bevel gear, 84 second bevel gear, 85 handle. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Reference Figure 1-4 , an ergonomic chair, comprising a fixed frame 1, a seat cushion 2 is installed on the top of the fixed frame 1, a plurality of moving wheels 3 are installed at the bottom of the fixed frame 1, a sliding rod 4 is slidably installed on the fixed frame 1, the outer surface of the sliding rod 4 and the fixed frame 1 are in contact with each other, a connecting piece 5 is arranged at the bottom end of the sliding rod 4, a pressing block 6 is connected to the bottom end of the connecting piece 5, and a non-slip pad is bonded to the bottom surface of the pressing block 6, the connecting piece comprises an outer cylinder, an inner rod and a spring, the outer cylinder is fixed at the bottom end of the sliding rod 4, the inner rod is slidably connected in the outer cylinder, the bottom end of the inner rod extends to the outside of the outer cylinder and is fixedly connected to the pressing block 6, the spring is installed between the outer cylinder and the inner rod, under the elastic force of the spring, the pressing block 6 will be tightly pressed on the ground, at this time, there is a large friction between the pressing block 6 and the ground, which can improve the stability of the fixed frame 1 on the ground, prevent the fixed frame 1 from sliding on the ground, and improve the stability of the ergonomic chair;

[0022] The fixing frame 1 is provided with an adjustment component, which includes a threaded rod 71, a threaded groove 72, two limit grooves 73 and two limit blocks 74. The threaded rod 71 is rotatably mounted on the fixing frame 1. The threaded groove 72 is provided at the top of the sliding rod 4, and the threaded groove 72 is threadedly sleeved on the threaded rod 71. The two limit grooves 73 are both provided on the fixing frame 1. The two limit blocks 74 are both fixed on the sliding rod 4, and the two limit blocks 74 are slidably connected in the two limit grooves 73 respectively. Under the limiting action of the two limit grooves 73 and the two limit blocks 74, the threaded rod 71 can drive the sliding rod 4 to move downward when it rotates. When the sliding rod 4 moves downward, it can drive the clamping block 6 to move downward through the connecting member 5, so that the clamping block 6 contacts the ground;

[0023] A driving assembly is also provided on the fixed frame 1, and the driving assembly includes a bracket 81, a rotating shaft 82, two first bevel gears 83, two second bevel gears 84 and a handle 85. The bracket 81 is fixed on the fixed frame 1, the rotating shaft 82 is rotatably mounted on the bracket 81, and the handle 85 is rotatably mounted on the fixed frame 1. One of the first bevel gears 83 is fixed to one end of the rotating shaft 82, and the other first bevel gear 83 is fixed to the handle 85, one of the second bevel gears 84 is fixed to the other end of the rotating shaft 82, and the other second bevel gear 84 is fixed to the threaded rod 71. The two first bevel gears 83 are meshed with each other, and the two second bevel gears 84 are meshed with each other. When the handle 85 is rotated, the rotating shaft 82 can be driven to rotate through the two mutually meshing first bevel gears 83, and when the rotating shaft 82 is rotated, the threaded rod 71 can be driven to rotate through the two second bevel gears 84.

[0024] The specific working principle of the utility model is as follows:

[0025] When the ergonomic chair proposed by the utility model is in use, when the user needs to fix the position of the ergonomic chair, firstly, the self-locking function is used to lock the plurality of moving wheels 3, and then the handle 85 is turned. When the handle 85 is turned, the two mutually meshing first bevel gears 83 can drive the rotating shaft 82 to rotate, and when the rotating shaft 82 rotates, the two second bevel gears 84 can drive the threaded rod 71 to rotate. Under the limiting action of the two limiting grooves 73 and the two limiting blocks 74, when the threaded rod 71 rotates, the sliding rod 4 can be driven to move downward, and when the sliding rod 4 moves downward, The pressing block 6 can be driven to move downward through the connecting piece 5 so that the pressing block 6 contacts the ground. When the pressing block 6 contacts the ground, the sliding rod 4 will continue to move downward. At this time, the outer cylinder will be close to the pressing block 6, and the inner rod will retract into the outer cylinder. The outer cylinder and the inner rod will squeeze the spring. Under the elastic force of the spring, the pressing block 6 will be tightly pressed on the ground. At this time, there is a large friction force between the pressing block 6 and the ground, which can improve the stability of the fixing frame 1 on the ground, prevent the fixing frame 1 from sliding on the ground, and improve the stability of the ergonomic chair.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An ergonomic chair, comprising a fixed frame (1), a seat cushion (2) being mounted on the top of the fixed frame (1), and a plurality of movable wheels (3) being mounted on the bottom of the fixed frame (1), characterized in that: A sliding rod (4) is slidably mounted on the fixed frame (1), a connecting piece (5) is provided at the bottom end of the sliding rod (4), a pressing block (6) is connected to the bottom end of the connecting piece (5), an adjusting component is provided on the fixed frame (1), and a driving component is also provided on the fixed frame (1).

2. The ergonomic chair according to claim 1, characterized in that: The adjusting assembly comprises a threaded rod (71), a threaded groove (72), two limiting grooves (73) and two limiting blocks (74); the threaded rod (71) is rotatably mounted on the fixing frame (1); the threaded groove (72) is arranged at the top end of the sliding rod (4), and the threaded groove (72) is threadedly sleeved on the threaded rod (71); the two limiting grooves (73) are both arranged on the fixing frame (1); the two limiting blocks (74) are both fixed on the sliding rod (4), and the two limiting blocks (74) are respectively slidably connected in the two limiting grooves (73).

3. The ergonomic chair according to claim 2, characterized in that: The driving assembly comprises a bracket (81), a rotating shaft (82), two first bevel gears (83), two second bevel gears (84) and a handle (85); the bracket (81) is fixed on a fixing frame (1); the rotating shaft (82) is rotatably mounted on the bracket (81); the handle (85) is rotatably mounted on the fixing frame (1); one of the first bevel gears (83) is fixed on one end of the rotating shaft (82); another of the first bevel gears (83) is fixed on the handle (85); one of the second bevel gears (84) is fixed on the other end of the rotating shaft (82); another of the second bevel gears (84) is fixed on the threaded rod (71); the two first bevel gears (83) are meshed with each other; and the two second bevel gears (84) are meshed with each other.

4. The ergonomic chair according to claim 1, characterized in that: The connecting member comprises an outer cylinder, an inner rod and a spring. The outer cylinder is fixed to the bottom end of the sliding rod (4). The inner rod is slidably connected in the outer cylinder. The bottom end of the inner rod extends to the outside of the outer cylinder and is fixedly connected to the clamping block (6). The spring is installed between the outer cylinder and the inner rod.

5. The ergonomic chair according to claim 1, characterized in that: The outer surface of the sliding rod (4) and the fixing frame (1) are in contact with each other.

6. The ergonomic chair according to claim 1, characterized in that: The bottom surface of the pressing block (6) is bonded with an anti-slip pad.

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