Rotary tool

A rotary tool, including:

• a driving rod;
• a driven rod, configured to be non-rotatably assembled with a workpiece to be rotated;
• and
• a transmission mechanism, including a first pivot seat, a second pivot seat, a driving bevel gear, a driven bevel gear and two transmission bevel gears, the first pivot seat and the second pivot seat pivotally connected with each other, the driving bevel gear rotatably disposed on the first pivot seat and non-rotatably connected to the driving rod, the driven bevel gear rotatably disposed on the second pivot seat and non-rotatably connected to the driven rod, the two transmission bevel gears engaged between the driving bevel gear and the driven bevel gear;
• wherein an elastic member is disposed between the first pivot seat and the driving bevel gear, and the elastic member urges the driving bevel gear to have a tendency to move in a direction toward the two transmission bevel gears;
• when the elastic member is compressed and the driving bevel gear is disengaged from the two transmission bevel gears, the first pivot seat and the second pivot seat are pivotable relative to each other to adjust an angle therebetween.