Office Chair Ratchet Structure

The ratchet structure of office chairs varies significantly in design features and application scenarios depending on the product type, primarily divided into two categories: the ratchet structure of foldable nap recliners and the ratchet pin-pull structure of午休课桌椅 (nap desk chairs).

Ratchet Structure of Foldable Office Nap Recliners

This structure is the core component for multi-angle adjustment, consisting of ratchets, pawls, and spring plates, among others. The ratchet is a toothed wheel disc fixed to the chair frame's rotating shaft; the pawl is an elastic clip that engages with the ratchet's tooth slots. During adjustment, the摇杆 (backrest) swings to drive the pawl into the tooth slots, pushing the ratchet to rotate to the desired angle; when swinging in the opposite direction, the stop pawl catches the tooth back to prevent reverse rotation, achieving angle locking.
Its core advantages include:

• Precise Positioning: The multi-tooth design supports 3-5 angle adjustments (e.g., 90° sitting, 135° semi-reclining, 180° lying flat), suitable for office and nap scenarios.
• Easy Operation: No tools are required; manually pulling the adjustment lever or pressing the unlock button releases the pawl, and it automatically locks after adjustment.
• Stable Load-Bearing: Metal ratchets (mostly carbon steel/aluminum alloy) paired with reinforced pawls can bear up to 150kg, ensuring safety during use.
  Usage Notes: Regularly lubricate the ratchet shaft to prevent foreign object blockage; choose models with anti-slip foot pads to prevent the recliner from shifting.

Ratchet Pin-Pull Structure of Nap Desk Chairs

Represented by the purely mechanical structure adopted by 校金刚 (School King Kong), it achieves multi-position locking through mechanical tooth engagement and relies on a pulling action to unlock and adjust. Its core advantages are:

• Extremely Reliable: No precision, fragile components; resistant to wear, tough, and durable, with strong adaptability to environments (e.g., humid, dusty conditions).
• Intuitive Operation: Adjustment is completed through instinctive actions like pushing, pulling, and lifting, without the need to search for specific buttons, suitable for quick operation by students.
  Limitations: Fixed positions prevent infinite adjustment, but in campus nap scenarios, fixed ergonomic positions already meet the needs.

Both structures achieve angle adjustment through mechanical principles, but the former focuses on multi-position precise control and comfort, while the latter emphasizes durability and ease of operation. The appropriate design should be selected based on the usage scenario.