Cooling fan e.g. for computer, has rotation speed control circuitry, and rotary knob or pushbutton attached to outside of cooling fan to allow user to control speed directly

摘要

The cooling fan (1) has a rotation speed controller comprising electronic components mounted on the circuit board (13) of the cooling fan. A rotary knob or pushbutton (16) for the rotation speed control is attached to the outside of the cooling fan (1), so that the user can set the speed of the fan directly using the knob or pushbutton.