Office Chair Cylindrical Knob
The cylindrical knob under the office chair is mainly used to adjust the backrest elasticity and tilt angle. Some advanced models can also adjust the recline tightness and control the protrusion of the lumbar support, with design differences among different brands.
Basic Functions
The core function of the cylindrical knob is to adjust the backrest elasticity and tilt angle. Turning the knob clockwise increases the backrest elasticity, making it tighter with more resistance when tilting; turning it counterclockwise has the opposite effect, making the backrest softer and easier to tilt. This function meets the personalized needs of different users for backrest support. For example, users who are heavier or prefer firm support can choose to tighten it, while those who are lighter or prefer a softer sitting experience can choose to loosen it.
Advanced Functions
Some advanced models of cylindrical knobs offer more functions. Some knobs can adjust the tightness of the backrest recline. When users need to recline for a rest, they can adjust the knob to make the recline process smoother or with appropriate resistance, enhancing the comfort of the rest. Some chair knobs can also control the protrusion of the lumbar support. For example, the Ergomax P2Pro has a lumbar support that can be adjusted in three dimensions (up, down, left, and right). Through the cylindrical knob, users can precisely control the protrusion height and angle of the lumbar support, providing more tailored support for the waist and effectively relieving waist fatigue.
Brand Differences
There are differences in the design of cylindrical knobs among different brands of office chairs. For example, the knob of the Ergomax Jinhao B is divided into an inner and outer ring. The inner ring is used to adjust the backrest height, while the outer ring controls the backrest elasticity. This design allows users to adjust two functions with one knob, making the operation more convenient. The cylindrical knob of the NetEase Yanxuan Xingjian Pro has the function of automatically sensing the user's weight and matching the force. It can automatically adjust the backrest elasticity and recline resistance according to the user's weight, eliminating the need for manual adjustment and making it more intelligent to use.
Usage Precautions
When adjusting the office chair cylindrical knob, it is important to maintain a correct sitting posture and avoid incorrect postures such as having your feet dangling or having the armrest height inappropriate. Incorrect sitting postures may lead to excessive pressure on the lumbar spine, causing waist pain, and may also cause discomfort such as leg numbness.
