Key Points for Adjusting Office Chairs

The key points for adjusting office chairs require precise operation based on the needs of various body parts, primarily including adjustments to height, backrest, armrests, seat depth, and other functions, as detailed below:

1. Seat Height Adjustment

• Operation Method: Locate the hand control device (such as a lever or knob) and adjust the height by pulling up or turning while seated; for pneumatic models, repeatedly push the lever up and down to raise or lower the seat. If adjusting from a standing position, ensure the front of the chair is just below the knees.
• Standard Posture: Adjust until both feet are flat on the ground, with thighs parallel to or slightly lower than the ground, and knees bent at approximately 90 degrees; if feet still cannot touch the ground after raising the chair to its maximum height, use a footrest for support.
• Precautions: Operate gently, moving a few centimeters at a time, and return the lever to its original position after adjustment; if adjustment is not possible, try positioning from a standing posture for assistance.

2. Backrest Angle and Lumbar Support Adjustment

• Backrest Angle: Adjust the backrest to 100-110 degrees using a knob, lever, or paddle, leaning back slightly to allow the back to naturally conform and avoid suspension; the lever to flatten the backrest is usually located beneath the right armrest.
• Lumbar Support Positioning: Adjust the lumbar support to press against the natural indentation of the lumbar spine (at the belt level); if the chair lacks independent lumbar support, use a rolled-up towel or lumbar cushion to fill the gap between the waist and backrest.
• Fixing Method: After sitting, pull the adjustment handle and lean back slightly with back pressure to fix the angle; to return to an upright position, continue pulling the handle and apply slight pressure, and the chair back will automatically spring back.

3. Armrest Height Adjustment

• Standard Posture: Adjust the armrests so that the arms hang naturally, with elbows bent at 90 degrees, shoulders fully relaxed, and forearms parallel to the ground; the inner edges of the armrests should easily slide under the desk for easy access to the desktop.
• Special Cases: If arm support is not needed (e.g., for keyboard operation), remove the armrests or lower their height to avoid obstructing the knees from sliding under the desk.

4. Seat Depth Adjustment (if available)

• Operation Goal: Adjust the seat depth so that the hips are fully seated at the deepest part of the seat, ensuring even support for the back of the thighs and reducing fatigue from prolonged sitting.

5. Other Function Adjustments

• Rocking Amplitude: Rotate the black cylinder in front of the chair's gas lift to adjust the front-to-back rocking amplitude.
• Mechanical Knob Type (e.g., Steelcase Gesture): Rotate the metal knob on the left side of the backrest clockwise 1-3 times for infinite adjustment between 15°-135°, with the green marker line indicating the optimal 135° recline angle.
• Pneumatic Rod Linkage Type (e.g., Herman Miller Aeron): Press and hold the red button on the lower right side of the seat cushion for 3 seconds, straighten the back, release the button, and grasp the pneumatic rod handle with both hands; the seat will complete adaptive recline within 8-12 seconds.
• Smart Touch Type (e.g., Ergohuman series): Upload the chair's QR code, height, and weight data via the brand's app and select a work mode; the system will automatically generate a three-dimensional adjustment plan (recline angle, seat depth, lumbar support height).