Photographic film wind-up and shutter charge mechanism
First Claim
1. A camera comprising a guide member having a hollow recess opening out of said guide member;
- fastening member receiving means;
a film wind-up and shutter charge mechanism operable to feed a film past an exposure station subsequent to exposure of the film and having a coupling member;
signal means having a movable contact movable in response to termination of exposure from a first position outside said hollow recess to a second position in said hollow recess subsequent to termination of exposure;
a camera drive unit having;
a fastening member receivable in said fastening member receiving means to fasten said drive unit onto said camera,a single positioning element receivable in said hollow recess in said guide member when said fastening member is received in said fastening member receiving means for acting together with said fastening member for positioning said camera drive unit relative to said camera, said single positioning element having an electrically conductive member capable of contacting said movable contact when said positioning element is received in said hollow recess in said guide member and when said movable contact moves to its second position,a drive mechanism couplable with said coupling member when said fastening member and said positioning element are received in said fastening member receiving means and said hollow recess in said guide member, respectively, for driving said film wind-up and shutter charge mechanism, andan electric circuit connected to said drive mechanism and having an input connected to said conductive element of said positioning element and actuated for actuating said drive mechanism in response to the contact of said conductive member with said movable contact; and
a stop member engageable with said film wind-up and shutter charge mechanism to prevent a film wind-up and shutter charge action at least during the period of exposure and means for disengaging said stop member from said film wind-up and shutter charge mechanism subsequent to termination of exposure, and wherein said stop member is associated with said signal means for moving said movable contact from said first to said second position upon the disengagement of said stop member from said film wind-up and shutter charge mechanism.
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Accused Products
Abstract
An electrical drive which includes a motor for actuation of a film wind-up and shutter mechanism subsequent to exposure of a film frame and a mechanism for decoupling drive from the motor at the end of each wind-up and shutter charge action and also during this action if something occurs a fault preventing correct action of the film wind-up and shutter charge mechanism, whereby damage to the mechanism, the motor and film is prevented. The drive is correctly positioned with respect to a camera by a mechanism which also serves to provide electrical connection between a shutter control circuit and a drive control circuit, whereby the number of elements required to be precisely positioned with respect to the camera is less and manufacturing and assembly cost is reduced.
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Citations
14 Claims
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1. A camera comprising a guide member having a hollow recess opening out of said guide member;
- fastening member receiving means;
a film wind-up and shutter charge mechanism operable to feed a film past an exposure station subsequent to exposure of the film and having a coupling member;
signal means having a movable contact movable in response to termination of exposure from a first position outside said hollow recess to a second position in said hollow recess subsequent to termination of exposure;a camera drive unit having; a fastening member receivable in said fastening member receiving means to fasten said drive unit onto said camera, a single positioning element receivable in said hollow recess in said guide member when said fastening member is received in said fastening member receiving means for acting together with said fastening member for positioning said camera drive unit relative to said camera, said single positioning element having an electrically conductive member capable of contacting said movable contact when said positioning element is received in said hollow recess in said guide member and when said movable contact moves to its second position, a drive mechanism couplable with said coupling member when said fastening member and said positioning element are received in said fastening member receiving means and said hollow recess in said guide member, respectively, for driving said film wind-up and shutter charge mechanism, and an electric circuit connected to said drive mechanism and having an input connected to said conductive element of said positioning element and actuated for actuating said drive mechanism in response to the contact of said conductive member with said movable contact; and a stop member engageable with said film wind-up and shutter charge mechanism to prevent a film wind-up and shutter charge action at least during the period of exposure and means for disengaging said stop member from said film wind-up and shutter charge mechanism subsequent to termination of exposure, and wherein said stop member is associated with said signal means for moving said movable contact from said first to said second position upon the disengagement of said stop member from said film wind-up and shutter charge mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- fastening member receiving means;
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8. A photographic camera comprising:
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a camera body having driven means therein; a guide member provided on said camera body and having a hollow recess therein; first circuit means provided in said camera body and having a movable first electrical terminal responsive to termination of an exposure by the camera so as to move into said hollow recess of said guide member and further having means for generating at said first electric terminal an electric signal representative of termination of an exposure operation of the camera; a drive unit having a motor driven camera drive mechanism; means for releasably attaching said drive unit to said camera body; a single positioning element provided on said drive unit and cooperable with said attaching means for positioning said drive unit in a predetermined positional relation with respect to said camera body such that said driven means is coupled with said camera drive mechanism, said single positioning element being receivable in said hollow recess of said guide member for the positioning of said drive unit when said drive unit is attached to said camera body and having a fixed second electrical terminal with which said first electrical terminal comes into contact when said single positioning element is in said hollow recess of said guide member and said first electrical terminal moves into said hollow recess of said guide member, said electric signal from said first circuit means being transmitted to said second electrical terminal upon the contact of said first electrical terminal with said second electrical terminal; and a second circuit means provided in said drive unit and having a drive control circuit connected to said motor driven camera drive mechanism and having said second electric terminal as an input thereof and activated for driving said motor driven camera drive mechanism upon receipt of said electric signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification