Power tool anvil lock mechanism

A power tool comprising:

• a housing that houses a driving source;
• a hammer that is driven in a rotation direction by the driving source and has a first protruding portion that extends in the same direction as a center line about which the drive source rotates;
• a shaft portion capable of rotating relative to the housing;
• an anvil that has a second protruding portion that extends from the shaft portion outward in a radial direction so as to be engaged with the first protruding portion, the second protruding portion having a plane-shaped surface extending in the radial direction and contacting the first protruding portion;
• and
• a locking mechanism that switches modes as to whether or not to lock the rotation of the anvil relative to the housing, wherein
• a lock releasing member is rotatably attached to the anvil,
• when the hammer is rotated, prior to the engagement of the first protruding portion with the second protruding portion, the first protruding portion is engaged with the lock releasing member so that the locked state of the locking mechanism is released, and
• the first protruding portion has
• a first surface extending in a first direction crossing a circumferential direction of the hammer for contacting the plane-shaped surface of the second protruding portion, and
• a second surface extending in a second direction crossing the circumferential direction of the hammer for contacting a portion of the lock releasing member, the second surface being arranged on an inner circumferential side of the hammer from the first surface and being offset from the first surface in the circumferential direction of the hammer.