Patent ID: 8511918

Claim:
A central shutter for a camera objective, said central shutter comprising: a ring-shaped leaf carrier surrounding a shutter aperture; at least two studs disposed on the leaf carrier, the at least two studs being arranged in a circularly symmetrical manner in relation to each other; a plurality of sickle-shaped shutter leaves pivotably mounted on the at least two studs; a motor-driven drive configured to pivot the shutter leaves over the shutter aperture, the drive including: a motorized rotatable winding ring that comprises a flat ring disk and rests on the leaf carrier, and a cam ring that comprises a flat ring disk and is rotatably mounted in the winding ring, the cam ring including a plurality of cams on a ring surface of the cam ring, wherein the winding ring and the cam ring are coupled to each other via at least one tension spring that is tensionable in a direction of rotation of the winding ring, wherein the cam ring is configured to control pivoting movement of the plurality of shutter leaves, and wherein the shutter leaves are connected to a pre-biased spring-loaded pivot lever such that: when the cam ring is rotated, said pivot lever pivots the shutter leaves into an open position via a front flank of at least one of the cams, and when the at least one of the cams is passed over, said pivot lever pivots the shutter leaves into the closed position.