Patent ID: 7637408

Claim:
A driving tool comprising: an elongated operating member that drives in a driving material by a reciprocating movement; and a drive mechanism that drives the operating member, wherein the drive mechanism comprises a flywheel that rotates, the flywheel including an inner wheel and an outer wheel which are concentrically disposed to each other, an inner circumferential surface of the outer wheel is fitted on an outer circumferential surface of the inner wheel, and an outer circumferential surface of the outer wheel directly contacts the operating member, whereby a rotational force of the flywheel is transmitted from the inner wheel to the operating member via the outer wheel and the drive mechanism linearly moves, and wherein a frictional force between the outer circumferential surface of the inner wheel and the inner circumferential surface of the outer wheel is smaller than a frictional force between the outer circumferential surface of the outer wheel and the operating member during all times of operation of the driving tool.