Patent ID: 7131503
Filing Date: 2006-11-07
Classification: B25B,B25D

Abstract:
1. An impact driver comprising: a motor housed in a housing; an output shaft protruding from the housing and provided so as to slightly move back and forth in the axial direction; a rotation impact mechanism for transferring a motor torque to the output shaft while applying the impact operation in the rotative direction in accordance with increase of a torque load on the output shaft, a percussion application mechanism for generating percussion to the output shaft in the axial direction in accordance with rotation of the output shaft, and a regulating means, provided with the housing, which can from outside the housing arbitrarily select between a percussion mode in which the percussion application mechanism is activated and a non-percussion mode in which the percussion application mechanism is stopped, wherein the percussion application mechanism comprises: wherein by means of the regulating means, the percussion mode can be selected for regulating the rotation of the second cam and the non-percussion mode can be selected for releasing the regulation of the rotation of the second cam.