An automatic film winding device in a camera in which a camera winding coupling is coupled to a motor drive side through a power transmission mechanism having a cam and a follower. The device comprises a cam system having a first cam for maintaining a motor drive circuit energized and a second cam for a film winding operation in said camera. After a release operation in the camera the motor drive circuit is energized in association with restoration of a camera release button or a shutter. The follower is displaced to the first cam by the relative motion of said first cam and follower caused by the further rotation of said motor, to maintain the motor drive circuit energized. After the completion of winding operation in the camera, the second cam is disengaged from the follower by the relative motion of the second cam and follower to deenergize the motor drive circuit.

In an automatic film wind up device including a drive disc driven by an electric motor and a driven disc connected to a film wind up shaft and rotated by the drive disc, the drive and driven discs are provided with a position detecting elements which detects a predetermined relative position of one disc to the other. The position detecting elements are electric non-contact type switch elements comprised of two elements one of which is mounted on the drive disc and the other of which is mounted on the driven disc. Only when the two elements are in alignment with each other, the motor is driven. The drive and driven discs are coupled together by means of a clutch or a click stop device and are disengaged from each other when the driven disc is forced to stop. Upon the stoppage of the driven disc, the detecting elements detects the disengagement of the discs and act to stop the motor.

A camera which has the capability of having film transported and the shutter cocked by way of a motor drive. The camera has a combined film-transporting and shutter-cocking structure capable of being displaced from a given starting position to an end position for transporting film and cocking the shutter and then being capable of automatically returning to the starting position so as to enable an exposure to be made. A transmission is operatively connected with this combined structure for displacing the latter from its starting to its end position, this transmission being operated by an operating structure which when the combined film-transporting and shutter-cocking structure reaches its end position acts on the transmission to release the latter combined structure so that it will automatically return to its starting position. This operating structure has only a one-way drive connection with the transmission so that it can operate the latter only in one direction. Moreover, the operating structure includes a motor drive which responds automatically to the reaching of the end position by the combined structure for transporting the film and cocking the shutter so as to terminate at this time the operation of the transmission while acting on the transmission to disconnect the latter from the combined structure so as to release the latter to return to its starting position so that an exposure can be made prior to the next driving connection between the transmission and the combined structure for transporting the film and cocking the shutter.

A camera with built-in motor having a motor disposed horizontally at the central bottom portion of the camera body and out of path of the input light for driving various drive mechanisms necessary for the photographing. Said motor has two output shafts extending out of the housing of the motor, so that two or more loads may be simultaneously driven by the motor. Said mechanisms are suitably sorted into groups by the magnitudes of the loads imparted by these mechanisms, and these groups are driven by the motor in such a sequence as to maintain a substantially constant level of load on the motor in relation to time.

A control mechanism for a motorized disk film camera which is of simple, compact and inexpensive construction and yet provides one-button operation to expose the film and actuate a motor which disengages the film and cocks the shutter, then advances and locates the film. The camera requires no expensive control components or switching mechanisms to synchronize the operation of the camera or to initialize a cartridge when it is loaded into the camera.