TWM676054U - Ergonomic office chair - Google Patents

Abstract

An ergonomic office chair includes a seat, backrest, headrest, armrests, leg support mechanism, and casters. The backrest has a multi-segment support structure, consisting of a headrest section, a mid-back section, and a lumbar support section. The lumbar support section is height-adjustable to support different users' back positions. The headrest is located in the headrest section via a double-link mechanism and has height and fore-and-aft angle adjustment functions. The lower end of the backrest is connected to the seat via a rotatable connector and a telescopic connector, and is equipped with a pair of elastic brackets and a backrest upright to form a three-point support structure. The chair features a design that enhances tilt stability and rebound elasticity. The seat has a cushion that can slide back and forth to adjust the seat depth, and a leg rest mechanism located on the lower front side that can be stored under the seat. The armrests can be adjusted up and down, forward and backward, and left and right to accommodate different usage scenarios and hand support needs. The bottom wheel assembly includes a gas spring, wheel frame, and casters, providing height adjustment and ground sliding functions. The overall structure can be adjusted in multiple directions according to the user's body shape and posture needs to improve human support and overall riding comfort.

Description

Ergonomic office chair

This invention relates to an office chair, and more particularly to an office chair with an ergonomic structure, comprising a multi-section backrest, an adjustable headrest, three-way adjustable armrests, a sliding seat, a stowable leg rest and a caster seat, and the position of each component can be adjusted according to the user's needs to improve support and comfort when sitting for long periods of time.

While existing office chairs generally have basic structural features such as headrests, backrests, armrests, and bases, the following problems still exist in actual use:

1. The backrest structure is mostly a single piece of board, which cannot provide segmented support according to the curve of the human spine, making it easy to feel tired or sore after sitting for a long time.

Second, most headrests or lumbar supports are not adjustable, making it difficult to accommodate users of different heights or body types and reducing ergonomic fit.

Third, although some handrails have height adjustment, they lack fine-tuning functions in the left-right or front-back directions, and cannot accommodate the user's hand movements and operating posture.

Fourth, the seat cushion is fixed and cannot be adjusted according to leg length, which affects thigh support and overall sitting posture stability.

5. Most existing office chairs do not have leg support structures, or the leg support cannot effectively support the user's calves. When the user leans back to rest, the legs are dangling or not supported enough, which can easily cause the lower back to sink, thereby increasing the burden on the lumbar spine and reducing the comfort and support stability when sitting for a long time.

In conclusion, existing office chairs still have room for improvement in terms of structural flexibility and segmented support mechanisms, hence the proposal of this new type.

The main purpose of this invention is to provide an ergonomic office chair that features a multi-section backrest structure, an adjustable headrest, three-way adjustable armrests, a sliding seat, a retractable leg rest and caster seat, and a back support column and elastic bracket to form a three-point back support, thereby improving support, adjustment flexibility and overall comfort during long periods of sitting.

This new type of office chair features a multi-segment support structure, including a headrest section, a mid-back section, and a lumbar support section. The headrest section is located at the upper part of the backrest and is connected via a double-link mechanism, allowing users to adjust its height and angle to accommodate different heights and neck postures. The lumbar support section is located at the lower part of the backrest and its support height can be adjusted via a retractable connector, providing close support for the user's lumbar spine.

The aforementioned chair back and seat are connected by a rotatable connection, allowing the chair back to tilt and rotate relative to the seat, enabling the user to lean back and stretch. The chair back can return to its original upright position after tilting back, providing flexibility for switching between sitting and working postures. The seat cushion has a sliding mechanism that allows it to slide forward and backward, adjusting the seat depth to accommodate the support needs of users with different leg lengths, improving leg pressure distribution and seating stability.

A leg rest mechanism is located at the front of the seat, comprising double sliding rails and a support plate. Users can pull out the leg rest to support their lower legs, or it can be completely stored under the seat cushion when not in use, maintaining a neat overall appearance. The surface of the leg rest can be covered with foam material or fabric to enhance support and comfort. The armrests are adjustable in the vertical, forward and backward, and horizontal directions, allowing users to fine-tune them according to their operating posture and arm angle to reduce strain on their arms, shoulders, and neck.

The backrest features a back support column and a pair of flexible brackets. The back support column, which may be made of metal, is vertically positioned in the center of the backrest to provide primary support for the backrest structure. The flexible brackets are S-shaped and symmetrically positioned on both sides of the backrest, deforming and returning to their original position during reclining, forming a three-point back support structure. A wheel bracket and multiple casters are located beneath the seat and connected to the seat via a pneumatic rod to support the overall structure and provide height adjustment functionality.

Based on the above description, the features and effects of this novel invention are briefly summarized as follows:

1. The chair back features a multi-segment support design, which can provide support for different positions such as the neck, back and waist, improving comfort when sitting for a long time.

2. The headrest has adjustable height and angle functions to adapt to different heights and sitting postures, and enhances the neck support effect.

3. A rotatable connector is provided between the backrest and the seat, allowing users to lean back and stretch as needed, improving the distribution of pressure during sitting.

4. The chair cushion has a front and back sliding mechanism, which can adjust the seat depth according to leg length, strengthen thigh support, and avoid pressure.

5. The leg support mechanism is retractable and retractable, providing calf support in a supine position, reducing the burden on the lumbar spine, and maintaining structural integrity.

6. The handrails can be adjusted up and down, forward and backward, and left and right to accommodate different operating postures and usage scenarios, reducing the burden on the shoulders, neck, and arms.

7. The chair back is equipped with a back support column and a flexible bracket, forming a three-point support frame that provides good stability and structural strength.

8. The chair is equipped with a wheel frame and casters under the seat, combined with a pneumatic rod structure, to provide height adjustment and easy movement on the ground.

As shown in Figures 1 and 2, this novel ergonomic office chair comprises: a seat 10, a backrest 20, a headrest 30, a pair of armrests 40, a leg support mechanism 50, a bottom wheel assembly 60, and a back support column 70.

As shown in Figures 1 and 2, the chair seat 10 has a cushion 11, under which a sliding mechanism 12 is provided, allowing the cushion 11 to slide in the front-to-back direction to adjust the seat depth to meet the support needs of users with different leg lengths. A leg rest mechanism 50 is provided under the front end of the chair seat 10. A gas spring and a bottom wheel set 60 are provided under the chair seat 10 to support the overall structure and provide height adjustment and ground movement functions.

Referring to Figures 2 and 3, the backrest 20 is an upward-extending structure extending from the rear of the seat 10, featuring a multi-segment support design. It includes a headrest segment 21, a mid-back segment 22, and a lumbar support segment 23, corresponding to the neck, back, and waist positions, respectively. Continuing to refer to Figures 2 and 3, the backrest 20 can recline relative to the seat 10 and is connected to the seat 10 at its lower end via a rotatable connector 24, allowing the backrest 20 to rotate around a horizontal axis, providing the necessary support angle for the user when reclining. This backrest 20 provides segmented, conforming support to users of different body types, enhancing comfort and stability during seating.

The middle back section 22 is located between the headrest section 21 and the lumbar support section 23. It is the main support area of the chair back 20 and corresponds to the central part of the user's back. Its shape and material can provide stable support and fit the curve, help to distribute the pressure on the backrest and strengthen the continuity of the overall structure of the chair back.

As shown in Figures 2 and 6, a retractable connector 25 is provided behind the lumbar support section 23. One end of the connector is connected to the backrest 20, and the other end is connected to one side of the back support column 70. When the backrest 20 is tilted, it can deform and help the backrest 20 return to an upright state after release, further improving structural stability and ease of use.

As shown in Figure 4, the headrest 30 is positioned above the headrest section 21 of the chair back 20 and is connected to the chair back 20 via a double-link mechanism 31. This double-link mechanism 31 includes two sets of joint links 311 and a swivel joint 312. The headrest 30 can be repositioned vertically and horizontally by extending the joint links 311 and adjusting the swivel joint 312. Users can adjust the headrest 30 to the optimal support position according to their neck height and tilt angle requirements, providing good neck support and reducing cervical strain.

As shown in Figures 1, 2, 7 and 8, the armrests 40 are located on both sides of the seat 10 and include an armrest support column 41 and an armrest cushion 42. The armrest support column 41 can slide vertically to adjust its height and is provided with an armrest positioning button 43 so that the user can adjust it to the desired height and fix it in place.

In addition, the armrest pad 42 of the armrest 40 can slide forward and backward and rotate left and right, providing multi-angle and multi-directional support to meet the arm support required for various usage scenarios such as typing, reading and resting.

Please refer to Figures 2 and 5. The leg support mechanism 50 is installed on the lower front side of the seat 10 and includes a slide rail 51 and a leg rest 52. The slide rail 51 can slide along the front-to-back direction of the seat 10 and can be pulled out from under the seat 10 for use. The leg rest 52 is located at the front end of the slide rail 51, providing support for the user's lower legs and feet, supporting the weight of the legs when lying down or resting. When not in use, the leg support mechanism 50 can be stored back under the seat 10, improving the overall space integration and ease of use.

As shown in Figures 1 and 2, the bottom wheel assembly 60 includes a pneumatic rod 61, a wheel frame 62, and several casters 63. The upper end of the pneumatic rod 61 is connected to the pneumatic rod below the seat 10 to support the seat 10 and provide height adjustment; the lower end is connected to the wheel frame 62 to form a stable support plane. The wheel frame 62 has a radial structure, and its end is equipped with casters 63, which can glide smoothly on the ground, improving the mobility and operational flexibility of this new type of office chair.

Referring to Figures 1, 2, and 6, a back support column 70 is provided on the rear side of the chair back 20. This back support column is curved and extended, with its upper end connected to the chair back 20 and its lower end connected to the retractable connector 25, supporting the tilting structure between the chair back 20 and the bottom wheel assembly 60. Elastic supports 71 are provided on both sides of the back support column 70, forming a three-point elastic support with the chair back 20, providing stable support and flexible cushioning during the tilting and returning of the chair back 20.

As shown in Figures 1 and 2, this new office chair has a multi-stage adjustment structure, allowing users to adjust the position of each part according to their body shape and usage habits. The headrest 30 is equipped with a double linkage mechanism 31, which allows for fine adjustment in the up-down and forward-backward directions, providing appropriate neck support; the backrest 20 can be used upright when working, and can be reclined to a comfortable lying angle when resting via the operating element under the seat 10.

As shown in Figures 1 and 2, this new office chair has a multi-stage adjustment structure, allowing users to adjust the position of each part according to their body shape and usage habits. The headrest 30 is equipped with a double linkage mechanism 31, which allows for fine adjustment in the up-down and forward-backward directions, providing appropriate neck support; the backrest 20 can be used upright when working, and can be reclined to a comfortable lying angle when resting via the operating element under the seat 10.

Please continue to refer to Figures 1 and 2. The lumbar support section 23 can be adjusted vertically along the backrest 20 to fit the user's lumbar spine height and maintain the normal physiological curve of the back. The seat cushion 11 can slide back and forth via the sliding mechanism 12 to adjust the seat depth to accommodate different leg lengths. The leg support mechanism 50 can be pulled out or stored from under the seat 10 as needed to provide support for the lower legs and feet and reduce lumbar spine pressure when lying on the back for a long time.

As shown in Figures 7 and 8, the armrests 40 can be adjusted up and down, forward and backward, and left and right to suit different work, reading, and rest scenarios. A gas spring 61 is provided under the seat 10, which can be adjusted in height by pressing the operating element. The structure of the wheel frame 62 and the pulleys 63 provides stable support and movement for the office chair, allowing the new chair to be smoothly positioned or glided in the work area.

From the above description, it can be understood that this new office chair integrates multiple adjustment functions through a multi-section backrest 20 design, adjustable headrest and lumbar support 30, seat cushion slide rail, leg support mechanism 50, three-way adjustable armrests 40, bottom wheel set 60 and pneumatic lifting structure, so as to adapt to different users' body shapes and usage situations, taking into account support, comfort and adjustment convenience, and has good ergonomic benefits and practical value.

In conclusion, this novel structure has not been seen in any books or publicly used, and it truly meets the requirements for a utility model patent application. We earnestly request the Bureau of Industry and Information Technology to review it and grant the patent as soon as possible. We are deeply grateful.

It should be stated that the above description is a specific embodiment of the present invention and the technical principle used. If any changes are made according to the concept of the present invention, and the resulting function does not exceed the spirit covered by the specification and drawings, they should be stated within the scope of the present invention.

10: Seat 11: Cushion 12: Sliding Rail Mechanism 20: Backrest 21: Headrest Section 22: Mid-Backrest Section 23: Lumbar Support Section 24: Rotatable Connector 25: Telescopic Connector 30: Headrest 31: Double Linkage Mechanism 311: Joint Linkage 312: Rotary Joint 40: Armrest 41: Armrest Support Column 42: Armrest Cushion 43: Armrest Positioning Button 50: Leg Support Mechanism 51: Sliding Rail Base 52: Leg Support Plate 61: Gas Bar 62: Wheel Frame 63: Casters 70: Backrest Upright Column 71: Elastic Support

Figure 1: Front view of the new ergonomic office chair. Figure 2: Side view of the new ergonomic office chair. Figure 3: Rear view of the new ergonomic office chair. Figure 4: Schematic diagram of the double-link structure of the new adjustable headrest. Figure 5: Schematic diagram of the new leg rest slide rail structure and its extended state. Figure 6: Schematic diagram of adjusting the backrest angle using the backrest, elastic support, and extendable connector. Figure 7: Close-up view of the new armrest adjustment. Figure 8: Schematic diagram of multi-directional armrest adjustment.

10: Chair Seat

11: Chair Cushion

12: Sliding rail mechanism

20: Chair back

21: Headrest section

22: mid-back section

23: Lumbar support section

24: Rotatable connector

25: Telescopic connectors

30: Headrest

31: Double linkage mechanism

311: Joint Linkages

312: Rotary Joint

40: Handrail

41: Handrail support column

42: Armrest Pads

43: Armrest positioning button

50: Leg support mechanism

51: Slide rail seat

52: Leg rests

61: Gas spring

62: Wheel frame

63: Pulleys

70: Back support column

71: Elastic support

Claims (6)

An ergonomic office chair includes a seat, a backrest, a headrest, a pair of armrests, a leg rest mechanism, and a set of wheels. Its features include: the backrest has a multi-segment support structure, comprising, from top to bottom, a headrest segment, a mid-back segment, and a lumbar support segment; the lumbar support segment is located at the lower part of the backrest and its height can be adjusted in the vertical direction; the headrest is mounted on the headrest segment via a double-link mechanism, which can adjust the headrest in the vertical direction. The position relative to the front and rear angles; the lower end of the chair back is connected to the seat via a rotatable connector, and also to a retractable connector. This retractable connector allows adjustment of the angle of the chair back relative to the seat. Furthermore, it is equipped with a pair of elastic supports and a backrest column. The elastic supports are located on both sides of the lower end of the chair back, and the backrest column is located in the center of the lower end of the chair back. Together, these three form a three-point support structure for the chair back, improving its tilt stability and recovery elasticity; the upper part of the seat... A chair cushion is provided, with a sliding mechanism integrated beneath it, allowing the cushion to slide forward and backward to adjust the seat depth. A leg rest mechanism, comprising a sliding rail and a leg rest plate, is located on the lower front side of the seat; the leg rest mechanism can be pulled out or retracted from under the seat. Armrests are located on both sides of the seat, each armrest comprising an armrest support column and an armrest pad, which can be adjusted vertically, forward and backward, and horizontally. The bottom wheel assembly includes a gas spring and a... The chair features a wheel frame and multiple casters. The upper end of the gas spring is connected to the bottom of the seat, and the lower end is inserted into the center of the wheel frame. The casters are located at the ends of the wheel frame, allowing for height adjustment and floor sliding of the office chair. The seat's forward and backward position can be adjusted via the sliding mechanism to accommodate users with different leg lengths. The rotatable connector supports the backrest, providing a reclining function. The bottom wheel assembly provides height adjustment and floor sliding functions to enhance overall usability and comfort. The ergonomic office chair as described in claim 1, wherein the backrest includes an elastic support that is rotatably connected between the backrest post and the lower end of the backrest, and provides backrest reclining elasticity and support through the elastic support. As described in claim 1, the ergonomic office chair has a headrest that is mounted on the headrest section via a double-link mechanism. The double-link mechanism includes two sets of joint links and swivel joints, which allow the headrest to be adjusted in the vertical direction and the front-back angle. The ergonomic office chair as described in claim 1, wherein the leg support mechanism includes a slide rail and a leg support plate, the leg support plate being able to slide back and forth along the slide rail and being stored under the seat when not in use. As described in claim 1, the ergonomic office chair includes an armrest support column and an armrest cushion. The armrest cushion can be adjusted relative to the armrest support column in the up-down, forward-backward, and left-right directions to adapt to different usage scenarios and hand support needs. The ergonomic office chair as described in claim 1, wherein the lower end of the backrest is connected to a back support column via an elastic bracket, the elastic bracket being disposed on both sides of the lower end of the backrest to provide the flexible support and restoring force required by the backrest during the reclining process.