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US 4,426,145 AGranted
Lens shutter camera
AssigneeOlympus Optical Co., Ltd.
InventorAkihiko Hashimoto
Life of this patent
Estimating the term…
Abstract
A lens shutter camera includes a distance adjusting mechanism which is operated by the rotation of a single ring in one direction as it is driven by a drive source such as a motor. A distance adjustment is performed by a movement of a movable taking lens barrel in the direction of an optical axis thereof. Rotation of the ring in the other direction operates a lens shutter mechanism to open the shutter blades. A shutter closing spring is charged by a shutter controlling electromagnet, and is enabled to close the shutter blades.
Claims26
A lens shutter camera comprising:
- a movable lens barrel carrying a taking lens and adapted to perform a distance adjustment of the taking lens through a movement thereof;
- a first cam formed on the movable lens barrel and having a continuous excursion in the direction of the optical axis of the taking lens for performing a distance adjustment of the taking lens;
- a guide pin fixedly mounted on a stationary member which supports the movable lens barrel in a movable manner, the guide pin being adapted to engage the first cam;
- a ring disposed for rotation about the optical axis of the taking lens;
- a second cam formed in one surface of the ring and having a continuous excursion and being arranged a predetermined distance from the center of rotation thereof, the rotation of the ring in one direction causing a movement of the lens barrel and the rotation of the ring in the opposite direction occurring independent from the lens barrel and causing a shutter to be operated;
- position detecting means for detecting the initial angular position of the ring as well as an angular position corresponding to a photographing distance established and an angular position where a shutter is to be operated;
- said shutter including shutter blade means disposed in alignment with the optical axis of the taking lens so as to be opened and closed;
- a shutter controlling electromagnet;
- blade opening and closing means engageable with the second cam formed on the ring and including a spring which is used to close said shutter blade means and also including an interlocking mechanism connected to the shutter blade means and the shutter controlling electromagnet, the rotation of said ring being effective to open the shutter blade means by cooperation with the action of the second cam whenever the electromagnet is energized, the shutter blade means being closed by the spring whenever the electromagnet is deenergized;
- and a drive source for rotating the ring.
7 more elements
A lens shutter camera comprising:
- a lens barrel and means for slidably mounting said lens barrel enabling the lens barrel to experience rotational and/or linear movement within said mounting means;
- a first cam formed upon the periphery of said barrel and extending so as to be closed upon itself;
- a stationary follower member slidably engaging said first cam for linearly moving the lens barrel as it rotates;
- a rotatable ring;
- drive means on said ring for imparting rotation to said lens barrel when said ring is rotated in a first direction and being released from said lens barrel when said ring rotates inn a second direction opposite said first direction;
- and
- position detection means responsive to rotation of said ring for detecting the angular distance moved by said lens barrel.
4 more elements
A lens shutter camera comprising:
- a ring rotatable about an axis;
- a cam on one face of said ring, said cam having a curved portion extending gradually inward from one end thereof and removed from said axis to a second point closer to said axis;
- a shutter;
- shutter operating means responsive to rotation of said ring in a first direction for opening said shutter;
- biasing means normally biasing said shutter operating means toward a first position for closing said shutter;
- means responsive to completion of a shutter open interval for placing said shutter operating means under control of said bias means for closing said shutter.
3 more elements
A lens shutter camera comprising:
- a shutter;
- a swingably mounted shutter operating lever means rotatable about a pivot and having a first end engaging said shutter and a second end;
- a ring rotatable about a predetermined axis;
- a cam on one surface of said ring engaging said lever means second end, said cam moving said lever means to open said shutter when said ring is rotated in a first direction;
- electromagnet means including an armature for maintaining the pivot in a fixed position;
- bias means for moving said pivot;
- and
- means responsive to a completed exposure period for deenerginzing said electromagnet to release said armature whereby said bias means moves said pivot in a direction to rapidly close said shutter.
5 more elements
Dependencies are inferred from the claim text.