Motor drive for a camera

Claim 2

A motor-driven film rewind device for a camera comprising a motor (1); a circuit including first and second switches (S4, S1) connected in series with each other for driving said motor when both of said first and second switches are closed; first manually operable means (17, 18, 23) movable between first and second positions, said first switch (S4) being associated with said first means to be closed when said first means is in second position; means (200) for preventing transportation of a film in a rewinding direction when said first means is in said first position and for permitting film transportation when said first means is in said second position; and second manually operable means (44, 47, 49, 50) engageable with a film supply spool (202) and connected to said motor for transmitting drive of said motor to said supply spool to rewind the film on said supply spool, said second means being movable between a first position in which it is disengaged from said supply spool and a second position in which it is engaged with said supply spool, said second switch being associated with said second means to be opened when said second means is in said first position and to be closed when said second means is in said second position; whereby when said first means and said second means are positioned in their respective second positions, said first and second switches are closed to rewind the film on said supply spool by the rotation of said motor.

Claim 3

A motor-driven film rewind device according to claim 1, wherein said second manually operable means comprises: a rotary shaft having at one end thereof coupling means engageable with said supply spool, said coupling means being engaged with said supply spool in the second position of said rotary shaft thereby to transmit the rotation of said rotary shaft to said supply spool; a manually operable lever connected to said rotary shaft to move the latter between first and second positions; and clutch means provided between said rotary shaft and said motor, said clutch means being adapted to connect said motor and said rotary shaft together only when said rotary shaft has been moved to its second position by said lever.

Claim 4

A motor-driven film rewind device according to claim 1, wherein said film transportation preventing means includes a sprocket.

Claim 5

A motor control mechanism for a camera in which the film winding and rewinding operations are effected by a drive motor, comprising: a reversible motor (1); a film rewinding circuit including first (S4), second (S2) and third (S5) switches connected in series with each other for driving said motor in the film rewinding direction when said first, second and third switches are closed; a film winding circuit including fourth (S3), fifth (S6) and sixth (S1) switches connected in series with each other for driving said motor in the film winding direction opposite to the film rewinding direction when said fourth, fifth and sixth switches are closed; film counter mechanism (33, 38, 32b) movable, in response to transportation of film in the winding direction, from an initial position in which no film loaded in the camera is wound, to a terminal position, in which the loaded film is completely wound, for indicating the number of the wound film frames, said counter mechanism actuating said first and said fourth switches so that said first and said fourth switches are closed when said mechanism is in said initial position, only said first switch being opened when said mechanism is moved from said initial position and said fourth switch being opened when said mechanism is in said terminal position; means for selectively preventing transportation of a film in the rewinding direction and permitting said film transportation; first manually operable means (17, 18, 23) associated with said selectively preventing means and said counter mechanism, said first manually operable means being movable between a first position, in which said selectively preventing means prevents said film transportation in the rewinding direction, and a second position in which said selectively preventing means permits said film transportation in the rewinding direction and said counter mechanism is returned to said initial position; second manually operable means (39, 44, 47, 46, 50) engageable with a film supply spool in the camera and connected to said motor for transmitting drive of said motor in the film rewinding direction to said supply spool to thereby rewind the film on said supply spool, said second manually operable means controlling said second and sixth switChes and being movable between a first position, in which said second means is disengaged from said supply spool and said second switch is opened and said sixth switch is closed, and a second position in which said second means is engaged with said supply spool and said second switch is closed and said sixth switch is opened; and means (S7, 27) for selectively closing either said third switch or said fifth switch, whereby, when said first and said second means are in said first positions, respectively, and said selectively closing means closes said fifth switch, the film winding operation is effected, and when said counter mechanism reaches said terminal position the film winding operation is stopped, and when said first and said second means are in said second positions, respectively, and said selectively closing means closes said third switch, the film rewinding operation is effected.

Claim 6

A motor control mechanism for a camera in which the film winding and rewinding operations are effected by a drive motor, comprising: a reversible motor (1); a film rewinding circuit including first (S4), second (S2) and third (S5) switches connected in series with each other for driving said motor in the film rewinding direction when said first, second and third switches are closed; a film winding circuit including fourth (S3), fifth (S6) and sixth (S1) switches connected in series with each other for driving said motor in the film winding direction opposite to the film rewinding direction when said fourth, fifth and sixth switches are closed; film counter mechanism (33, 38, 32b) movable, in response to transportation of film in the winding direction, from an initial position in which no film loaded in the camera is wound, to a terminal position, in which the loaded film is completely wound, for indicating the number of the wound film frames, said counter mechanism actuating said first and said fourth switches so that said first and said fourth switches are closed when said mechanism is in said initial position, only said first switch being opened when said mechanism is moved from said initial position and said fourth switch being opened when said mechanism is in said terminal position; means for selectively preventing transportation of a film in the rewinding direction and permitting said film transportation; first manually operable means (17, 18, 23) associated with said selectively preventing means and said counter mechanism, said first manually operable means being movable between a first position, in which said selectively preventing means prevents said film transportation in the rewinding direction, and a second position in which said selectively preventing means permits said film transportation in the rewinding direction and said counter mechanism is returned to said initial position; second manually operable means (39, 44, 47, 46, 50) engageable with a film supply spool in the camera and connected to said motor for transmitting drive of said motor in the film rewinding direction to said supply spool to thereby rewind the film on said supply spool, said second manually operable means controlling said second and sixth switChes and being movable between a first position, in which said second means is disengaged from said supply spool and said second switch is opened and said sixth switch is closed, and a second position in which said second means is engaged with said supply spool and said second switch is closed and said sixth switch is opened; and means (S7, 27) for selectively closing either said third switch or said fifth switch, whereby, when said first and said second means are in said first positions, respectively, and said selectively closing means closes said fifth switch, the film winding operation is effected, and when said counter mechanism reaches said terminal position the film winding operation is stopped, and when said first and said second means are in said second positions, respectively, and said selectively closing means closes said third switch, the film rewinding operation is effected.

Claim 7

A motor control mechanism according to claim 4, wherein said selectively closing means includes a solenoid (27), said solenoid being associated with said third and said fifth switches so that during energization of said solenoid said third witch is opened and said fifth switch is closed, and that during deenergization is said solenoid said third switch is closed and said fifth switch is opened.

Claim 8

A motor control mechanism according to claim 5, wherein said selectively closing means further includes a seventh switch (S7), said solenoid being connected to said seventh switch and said fourth switch so that said solenoid is energized when said seventh and said fourth switches are closed.

Claim 9

A motor control mechanism according to claim 4, wherein said second manually operable means comprises: a rotary shaft having at one end thereof coupling means engageable with said supply spool, said coupling means being engaged with said supply spool in the second position of said rotary shaft thereby to transmit the rotation of said rotary shaft to said supply spool; a manually operable lever connected to said rotary shaft to move the latter between first and second positions; and clutch means provided between said rotary shaft and said motor, said clutch means being adapted to connect said motor and said rotary shaft together only when said rotary shaft has been moved to its second position by said lever.