Motor driven camera

A motor driven camera having a film windup device for winding up film by an electric motor for windup as a drive source, comprising:

• (a) a first windup transmission system for rotating a spool by said motor for windup as the drive source, said first windup transmission system being driven through a first planetary clutch arranged to be drivenly connected by rotation of said motor in one direction;
• (b) a second windup transmission system for rotating a sprocket by said motor for windup as the drive source, said second windup transmission system being driven through a second planetary clutch arranged to be released from the connection by rotation of said motor in the other direction;
• (c) auto-loading control means for controlling the rotation of said motor for windup, said control means including a first control step of rotating said motor in the one direction by a prescribed amount when blank film advance is effected as an auto-loading is performed, a second control step of rotating said motor in said other direction by a prescribed amount after said first control step, and a third control step of rotating said motor again in said one direction by a prescribed amount after said second control step;
• (d) holding means for holding said second planetary clutch in a released state from said connection, the holding operation of said holding means being performed in said second control step;
• and
• (e) detecting means for detecting whether or not the film has been taken up onto said spool by the auto-loading, said detecting means performing detection by whether or not said sprocket is driven to rotate as a follower by the film when in said third control step.

A motor driven camera comprising:

• (a) a first electric motor;
• (b) a film rewind drive mechanism for driving film in a rewind direction by said first motor as the drive source, said film rewind drive mechanism having a planetary clutch arranged to connect said first motor with a transmission system by rotation of said first motor in one direction, and to cut off said connection by rotation of said first motor in the other direction;
• (c) a second electric motor;
• (d) a film windup drive mechanism for driving the film in a windup direction by said second motor as the drive source;
• (e) auto-loading control means for controlling the driving of said first motor to advance the film in blank by a prescribed amount when the film is loaded;
• (f) failure detecting means for detecting that the blank film advance by said auto-loading control means has failed;
• and
• (g) motor control means responsive to a signal representing the failure of the blank film to advance from said failure detecting means for forcibly rotating said first motor in the other direction.