Hammer drill

A hammer drill comprising:

• a motor;
• a cylindrical tool holder that is configured to hold a tip tool at a front end thereof, includes a striking portion of the tip tool housed therein, is movable forward and rearward and rotatable coaxially with a strike axis line of the striking portion, and is biased to protrude frontward;
• an intermediate shaft arranged parallel to the tool holder, rotation of the motor being transmitted to the intermediate shaft, the intermediate shaft transmitting the rotation to the tool holder;
• a rotation conversion portion that is disposed on the intermediate shaft and converts the rotation of the intermediate shaft into a striking motion of the striking portion;
• a mode switching member that moves forward and rearward together with the tool holder, causes the rotation conversion portion to be inactive in an advance position of the tool holder, and causes the rotation conversion portion to be active in a retreated position of the tool holder;
• a restricting member configured to restrict a retreat of the mode switching member in the advance position of the tool holder;
• and
• an operation member configured to switch the restricting member between a first switch state in which the restricting member does not restrict the retreat of the mode switching member and a second switch state in which the restricting member restricts the retreat of the mode switching member, wherein
• the first switch state of the restricting member by the operation member causes the first operation mode in which the rotation of the tool holder and the striking motion of the striking portion are allowed to be performed simultaneously in conjunction with the retreat of the tool holder to the retreated position, and the second switch state of the restricting member by the operation member causes the second operation mode in which the retreat of the tool holder from the advance position is restricted and the tool holder is allowed to be rotated only, and
• the restricting member is arranged behind the mode switching member in a direction of the strike axis line, the restricting member is provided with a plurality of restricting portions that contact the mode switching member to restrict the retreat of the mode switching member, and the at least one of the plurality of restricting portions is positioned in each of two regions mutually opposed with respect to the strike axis line.