Accessory clamping mechanism and power tool having the same

A power tool, comprising:

• a housing;
• a motor accommodated in the housing and having a driving shaft;
• a power source for providing power to the motor;
• and
• a transmission mechanism for converting the rotating motion of the driving shaft of the motor into the oscillating motion of the working mandrel around the axis thereof;
• and
• an accessory clamping mechanism for clamping an accessory to a working mandrel having a mandrel flange wherein the accessory clamping mechanism comprises:
• a fastening flange;
• a driving device for forcing the fastening flange to move between a released position in which the accessory can be removed between the mandrel flange and the fastening flange and a clamped position in which the accessory is clamped between the mandrel flange and the fastening flange;
• a pushing member connected to the fastening flange and transmitting the force applied to the driving device by a user to the fastening flange;
• and
• a first elastic member by which the fastening flange is biased towards the clamped position;
• wherein the pushing member is arranged on one side of the working mandrel, and the pushing member has a longitudinal axis offset and parallel to a rotation axis of the working madrel.