US Patent 10495252 Supporting frame

A supporting frame for holding a display includes a fixed base, a gas spring, a cam, a cantilever arm and a connecting element. The gas spring extends along a first direction and is disposed on the fixed base. The cam is against a pressure bearing head of the gas spring. The cantilever arm has a first end connecting to the cam. The connecting element is pivotally connected to the cantilever arm so as to hold the display. When the cantilever arm rotates toward the fixed base to cause the cam rotating, the gas spring is pressed. The gas spring is able to have various levels of elastic force and thus the display is adapted to stop at any height between a raised position and a lowered position.