Patent ID: 6932165

Claim:
A controlling mechanism of pneumatic tool, the pneumatic tool comprising a main body, the main body having an inlet passage through which air flows into a pneumatic motor disposed in the main body, a rear end of the inlet passage having a through hole with a diameter smaller than the diameter of the inlet passage, a radial hole passing through the through hole for receiving a speed adjustment button and a direction switching button, the speed adjustment button having an end board and a receiving space adjacent to the end board, the receiving space being open on one side of the speed adjustment button, one side of the end board being formed with a notch communicating with the receiving space, the speed adjustment button being formed with an axial through hole in which a pin member is inserted, one end of the pin member protruding from the main body and being pushed by a pressboard, the other end of the pin member extending into the receiving space and being formed with a through hole, a valve rod being inserted through the through hole of the inlet passage into the through hole of the pin member, the valve rod being connected with a valve plate for blocking the through hole of the inlet passage, a pad member being disposed between the direction switching button and the speed adjustment button, the pad member being formed with a notch, the direction switching button and the speed adjustment button being both fixed in the radial hole of the main body by a pin member.