Patent ID: 8347981

Claim:
A power tool which linearly drives a tool bit to perform a predetermined operation on a workpiece comprising: a tool body, a driving motor housed within the tool body, a motor output shaft of the driving motor which extends in an axial direction of the tool bit, a motion converting section, having a swinging member that swings in the axial direction of the tool bit by rotation of the motor output shaft, and a driving element that is disposed parallel to the motor output shaft and moves linearly in the axial direction of the tool bit via components of the swinging movement of the swinging member in the axial direction of the tool bit, wherein the motion converting section is disposed to the tool bit side of the driving motor in the axial direction of the tool bit, an air spring chamber defined within the driving element, a striking element that strikes the tool bit via the air spring chamber by linear movement of the driving element, an internal space which is located around the motion converting section within the body and extends in a co-axial direction of the tool body of the power tool, an inner edge of the internal space being defined by an outer edge of the motion converting section, and an outer edge of the internal space being defined by an outer periphery of the driving motor, when viewed from the co-axial direction of the tool body of the power tool, which is parallel to the axial direction of the tool bit, and a dynamic vibration reducer having a weight and an elastic member that elastically supports the weight with respect to the tool body, wherein the weight elastically supported by the elastic member moves linearly in the axial direction of the tool bit against a spring force of the elastic member to reduce the vibration of the tool body, and the dynamic vibration reducer is disposed within the internal space.