Hand-held tool and clamping device thereof

A clamping device of a hand-held tool, wherein the clamping device comprises:

• a mounting base;
• a clamping unit being configured to fasten a working tool in an axial direction and comprising a clamping member capable of pivoting around an axis parallel to the axial direction and a locking member capable of mating with the clamping member;
• and
• an operation assembly, comprising an operating member for use by an operator and a driving member, wherein the operating member is capable of performing a compound motion relative to the mounting base, and the operating member is manually operated and directly touched by the user to drive the driving member to selectively mate with and disengage from the clamping member;
• wherein one of the operating member and the mounting base is provided with a guiding member, the other one of the operating member and the mounting base is provided with a guiding groove, and the guiding member is rotatable and sliding in the guiding groove thereby leading the operating member to perform the compound motion relative to the mounting base between an initial position wherein the driving member is disengaged from the clamping member and an open position wherein the driving member selectively mates with the clamping member, when the driving member is mated with the clamping member, the operating member is capable of driving the clamping member to rotate around the axis to clamp with or release the locking member.