Patent ID: 7108118

Claim:
A centrifugal clutch comprising: a clutch drum; clutch shoes, each having an arc shape in a circumferential face, that are placed closely to an inner circumferential face of the clutch drum; a rotary shaft; a flange that is allowed to rotate integrally with the rotary shaft inside the clutch drum; arm members that couple the clutch shoes and the flange to each other; and springs that apply spring force to the respective clutch shoes toward the rotary shaft side, wherein: the clutch shoes are allowed to shift toward the inner circumferential face of the clutch drum, as a rotational speed of the rotary shaft increases, the arm members are attached to the clutch shoes side and the flange side in a manner so as to freely pivot thereon, with weights of front and rear sides of the respective clutch shoes in a rotation direction being made asymmetrical with each other relative to an installation position of the arm members in relation to the clutch shoes; and with respect to weights of front and rear sides of the clutch shoes in the rotation direction, the weight on the rear side is made greater than that on the front side, relative to installation position of the arm members in relation to the clutch shoes.