Winding device for camera
AssigneeCanon Kabushiki Kaisha
InventorsHirovuki Kimura, Tateo Yamada
Life of this patent
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Abstract
In a winding device for a camera in which automatic winding of loaded film from a winding start position to a first picture taking position is effected without interrelation to photographic operation, the automatic film winding is enabled by controlling a control member of the winding device by a change-over member which is actuated in response to a counter displaying the numbers of exposed film frames. When in the rewinding mode, in order to insure that the film can be rewound to the winding start position without failure, actuation of the change-over member is not transmitted to the control member.
Claims13
A winding device for a camera in which winding of a loaded film from a winding start position to an exposure start position is made automatically without interrelation to exposure operations, comprising:
- display means for displaying the number of film frames exposed during exposure operations, said display means being rotatable in response to winding and rewinding of the film and being restorable to an initial state before film winding by completion of film rewinding;
- control means operative to automatically enable winding of loaded film, said control means being movably supported;
- changeover means associated with rotation of said display means, said display means being in contact with said control means to maintain said control means operative while said display means displays the region from the winding start position to the exposure start position;
- and
- displacing means for displacing said control means out of the operative zone of the changeover means, said displacing means operating in response to a rewind releasing operation.
A winding device for a camera in which winding of a loaded film from a winding start position to an exposure start position is made automatically without interrelation to exposure operations, comprising:
- display means for displaying the number of film frames exposed during exposure operations, said display means being rotatable in a first direction in response to film winding and in a second direction in response to film rewinding, and being restorable to its initial state before commencement of film winding by completion of film rewinding;
- control means for enabling automatic windup of the loaded film;
- and
- changeover means in integral association with said display means when it rotates in said first direction, and movable independently from said display means when it rotates in said second direction, said changeover means having a projection which is brought into contact with said control means to render it operative while the display means displays the region from the winding start position to the exposure start position, said changeover means being restricted in its movement when said display means rotates in said second direction.
A winding device for a camera in which winding of a loaded film from a winding start position to an exposure start position is automatically carried out without interrelation to exposure operations, comprising:
- display means responsive to advancement of said film for displaying the number of film frames;
- control means rendering it possible to automatically wind up the loaded film;
- changeover means rendering said control means operative when said display means presents a display of the interval from the film winding start position to the exposure start position;
- and
- displacing means causing said control means to be displaced so as to render impossible the changeover by said changeover means when in the film rewinding mode, said displacing means being actuated in response to a rewind releasing operation;
- said control means comprising a switch for controlling the drive of an electric motor, said switch being provided on a pivotal lever and being displaceable out of the range of movement of said changeover means.
A winding device for a camera for automatically effecting winding of loaded film from a winding start position to an exposure start position comprising:
- display means for displaying the number of film frames exposed during exposure operation of said camera, said display means being rotatable in response to winding and rewinding of said film and being restored to an initial position upon completion of film rewinding prior to commencement of film winding;
- control means for automatically effecting winding of loaded film;
- switch means including means movable with said display means for rendering said control means operative to wind said film during an interval from said winding start position until said exposure start position;
- and
- changeover means movable in response to changeover between film winding and film rewinding operation to render said switch means inoperative from automatically effecting film winding during exposure operations and during film rewinding.
Dependencies are inferred from the claim text.