Driving mechanism of lens barrier and zoom lens for camera

A camera, comprising:

• a zoom lens;
• a barrier for covering/exposing said zoom lens;
• a zooming mechanism for driving said zoom lens to move in a direction of an optical axis of said zoom lens;
• a barrier mechanism for driving said barrier to open/close said zoom lens;
• a motor;
• a first gear train connected to said motor;
• a second gear train connected to said zooming mechanism;
• a planetary gear mechanism including a sun gear, a first arm rotatable about the rotation axis of said sun gear, a planetary gear rotatably supported by said first arm, said planetary gear engaging said sun gear, a barrier drive gear fixed to said first arm, rotation axis of said barrier drive gear coincides of the rotation axis of said first arm,
• said sun gear being connected to said first gear train, said planetary gear being movable between a first and second positions, said planetary gear being engaged with said second gear train when located at said second position and disconnected therefrom when moved away from said second position, said barrier drive gear being connected to said barrier opening/closing mechanism, said barrier opening/closing mechanism being driven when said planetary gear moves between said first and second positions.