Key Points of Office Chair Design
The core focuses of office chair design encompass multiple dimensions, including structure, materials, ergonomics, adjustability, dynamic support, pressure distribution, safety, and scenario adaptability. Details are as follows:
1. Core Structure and Functional Design The basic structure should include five parts: backrest, seat cushion, armrests, base, and casters. The backrest adopts a segmented design, with independent support in the lumbar region to fit the spinal curve, and a fixed headrest in the head region to relieve neck pressure. The seat cushion should preferably use high-density foam or mesh fabric; the former disperses pressure, while the latter allows for air circulation. The base integrates a pneumatic height adjustment mechanism to accommodate users of different heights. The five-pronged caster set should feature silent rollers to reduce noise during movement.
2. Material Selection and Performance Differences Mesh fabric should be formed by interweaving polyester and nylon to create a three-dimensional mesh structure, keeping the seat surface dry and adapting to different body types. Fixed armrests can be made of PP plastic (highly wear-resistant) or PU-padded (soft to the touch). Metal components in the base often use thickened steel, with a load-bearing capacity of up to 150 kg, paired with a three-stage pneumatic rod for stepless height adjustment.
3. Eronomic Support Design a 4-6 cm protruding support for the lumbar spine (L3-L4 region), with the back curvature conforming to the natural S-shape of the spine, covering over 70% of the back area. The lumbar support height should be located at the fourth and fifth lumbar vertebrae, 15-18 cm from the seat cushion, to fit the body's physiological curve.
4. Adjustment Dimensions The seat height adjustment range should meet 38-53 cm to accommodate 5%-95% of the population. Seat depth adjustment should offer at least three levels (15-25 cm adjustment range) to suit different leg lengths. Armrest height adjustment should range from 5-10 cm, with an angle adjustment exceeding 15ยฐ to ensure the forearms form a 15ยฐ-30ยฐ angle with the desktop. Reasonable ranges are: seat height 43-53 cm, seat depth 39.5-46 cm, seat width 46-50 cm, and armrest height to seat surface distance 19-25 cm.
5. Dynamic Support Use a TรV-certified Class-4 pneumatic rod, with a chair foot diameter of at least 6 cm for the nylon bracket, and wheels that pass a 100,000-roll test. Through a่ๅจ (linked) mechanism between the seat cushion and backrest, allow free pelvic tilting to maintain the natural lumbar curve.
6. Structural Safety and Mobility Stability The bracket should meet the EN 1335 standard, with a load-bearing capacity of at least 150 kg, and the pneumatic rod should pass a 100,000-lift test. The chair foot diameter to wheelbase ratio should conform to the 1:1.8 golden ratio to ensure stability when reclining 30ยฐ.
7. Functional Configuration and Applicable Scenarios The 360-degree rotation function is achieved through a built-in rotating bearing in the base. Fixed armrests can simplify structural complexity, suitable for standardized office scenarios. A gross weight of 20 kg ensures structural stability and facilitatesๆฌ่ฟ (transportation) and office space reorganization.
