Power tool facilitating replacement of operating head

A power tool, comprising:

• a housing;
• a drive motor disposed in the housing;
• a control switch configured to control activation and deactivation of the drive motor, the control switch being in the housing;
• an output shaft configured to mount an operating head;
• and
• a shaft-locking mechanism mounted on the output shaft;
• wherein:
• the drive motor is in transmission connection with the output shaft,
• the shaft-locking mechanism comprises:
• a first clutch piece secured to the output shaft,
• a second clutch piece sleeved over the output shaft, and
• a control pusher configured to move along an axial direction of the output shaft,
• the control pusher is in transmission connection with the second clutch piece to control the second clutch piece to move along the axial direction of the output shaft,
• the control pusher has
• a power-on position where the control switch is triggered and the second clutch piece is separated from the first clutch piece,
• a power-off position where the control switch is released and the second clutch piece is separated from the first clutch piece, and
• a shaft-locking position where the control switch is released and the second clutch piece and the first clutch piece form a circumferential limit,
• the power-on position, the power-off position, and the shaft-locking position are sequentially arranged along the axial direction of the output shaft,
• a locating mechanism configured to locate the control pusher is disposed between the control pusher and the housing,
• a tab is arranged at an outer peripheral side of the second clutch piece, and the control pusher is formed with a snap slot,
• the control pusher and the second clutch piece are connected via snap-fitting between the tab and the snap slot,
• the control pusher is provided with two extension plates extending till two lateral sides of the second clutch piece, the snap slot being formed on each of the extension plates,
• a front end of each of the extension plates has an abutting surface, and
• when the control pusher is located at the power-on position, the abutting surface abuts against a contact piece of the control switch to trigger the control switch.