US 12,228,851 B2
Camera shutter device having a two-armed lever
Frank Weisbach, Jena (DE)
Assigned to JENOPTIK Optical Systems GmbH, Jena (DE)
Appl. No. 18/006,809
Filed by JENOPTIK Optical Systems GmbH, Jena (DE)
PCT Filed Aug. 5, 2021, PCT No. PCT/DE2021/100672
§ 371(c)(1), (2) Date Jan. 25, 2023,
PCT Pub. No. WO2022/033632, PCT Pub. Date Feb. 17, 2022.
Claims priority of application No. 10 2020 121 173.2 (DE), filed on Aug. 12, 2020.
Prior Publication US 2023/0273505 A1, Aug. 31, 2023
Int. Cl. G03B 9/10 (2021.01)
CPC G03B 9/10 (2013.01) 16 Claims
OG exemplary drawing
 
1. A camera shutter device, comprising:
an optical opening,
an electromagnetic drive fixedly arranged to the optical opening and having a linearly guided moving part,
a first shutter blade movable to an open position exposing the optical opening and to a closed position covering the optical opening, and
a two-armed lever divided by a pivot point into an input end and an output end with a counterweight, the two-armed lever configured to be pivoted about the pivot point over a pivot angle range,
wherein:
the pivot point is located on an axis of rotation fixed relative to the optical opening and the input end is in communication with the moving part,
the first shutter blade forms a unit which is fixedly connected to the moving part,
a second weight force acts on the counterweight, causing a second torque about the axis of rotation that counteracts a first torque caused by a first weight force acting on the unit, and
a first permanent magnet, having at least one magnetic face, is fixedly arranged within the pivot angle range associated with the counterweight in such a way that the counterweight is held in an open position and a closed position by a magnetic force of the first permanent magnet, or
a first and a second permanent magnet, each having at least one magnetic face, are provided, which are arranged in association with the counterweight in such a way that the counterweight is held in an open position by a magnetic force of the first permanent magnet and in a closed position by a magnetic force of the second permanent magnet.