Connecting device for connecting a fan blade to a rotor of a motor of a ceiling fan

A connecting device for connecting a fan blade to a rotor of a motor of a ceiling fan, the motor including a stator and the rotor which is concentrically surrounded by the stator and which is rotated about an axial direction, said connecting device comprising:

• a bottom member with a periphery adapted to be attached on the rotor and spaced apart from the stator in the axial direction, said bottom member being disposed transverse to and being rotatable about the axial direction;
• a circumferential wall extending upwardly from said periphery toward the stator and diverging away from said bottom member so as to form an annular slanting wall;
• a mounting arm including an anchored end adapted for mounting the fan blade thereon, and an anchoring end disposed to be brought to anchor on said bottom member such that said mounting arm is oriented in a radial direction relative to said bottom member;
• means for tightening said anchoring end relative to said bottom member through a clamping force generated in a circumferential direction of said bottom member when said anchoring end is pulled away from said bottom member in said radial direction, said tightening means being disposed between said mounting arm and said bottom member;
• a guiding member disposed between said anchoring end and said bottom member to guide said anchoring end to move in said radial direction relative to said bottom member;
• and
• a retaining member disposed between said tightening means and said anchored end in said radial direction, and including an engaging spring member mounted on said mounting arm, said engaging spring member abutting against said annular slanting wall and providing an upward biasing force to said annular slanting wall once said anchoring end is moved away from said bottom member in said radial direction.