Power tool and operating method for use on the power tool

An operating method for a power tool comprising a housing;

• a motor disposed in the housing for outputting rotary power;
• an output shaft having an accommodating hole for holding a tool bit;
• a transmission mechanism disposed between the motor and the output shaft for transmitting rotary power from the motor to the output shaft;
• a tool bit supporting assembly for holding at least two tool bits;
• a connecting member disposed in the housing and movable relative to the tool bit supporting assembly between a working position where torque transmission from the motor to one of the at least two tool bits, which one tool bit is held by the accommodating hole, is enabled and a release position where torque transmission from the motor to any of the at least two tool bits is disenabled;
• an operating member movably arranged on the housing;
• and an automatic shifting means for adjusting a position of the tool bit supporting assembly in response to movement of the operating member, with the tool bit supporting assembly enabling one of the at least two tool bits, which one tool bit is held by the tool bit supporting assembly, to move from one position to another under action of the automatic shifting means, the operating method comprising the following steps:
• controlling the operating member to drive the connecting member to move to the release position, and then
• controlling the operating member to drive the automatic shifting means to make the tool bit supporting assembly move such that the one of the at least two tool bits, which one tool bit is held by the tool bit supporting assembly, moves from one position to another.