How do you convert linear motion into rotation by using bell crank lever?

A bell crank lever converts linear motion into rotational motion through its lever arms. When a force is applied to one arm of the bell crank, it pivots around a fulcrum, causing the opposite arm to move in a circular motion. This movement can then be used to drive a rotating component, such as a wheel or shaft. The angle and length of the lever arms determine the efficiency and range of motion of the conversion.