# US 2024/0201566 A2 · Camera shutter device with permanent magnets

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- Number: US 2024/0201566 A2
- Document ID: US20240201566A2
- Status: Published application
- Kind: A2
- Application number: 17/995,650
- Filed: 2021-04-14
- Published: 2024-06-20
- Earliest claimed: 2020-04-22
- Assignees: JENOPTIK Optical Systems GmbH
- Applicants: JENOPTIK Optical Systems GmbH
- Inventors: Uwe SCHALLER
- Web page: https://patentgrep.com/patent/US20240201566A2

## CPC

- G03B 9/36: Sliding rigid plate
- G03B 11/043: {Protective lens closures or lens caps built into cameras}
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

A camera shutter device having a shutter blade which moves abruptly between a first position, in which it covers a transmission zone present between the carriers, and a second position, in which it opens up the transmission zone. On the shutter blade, there is provided a slide body which includes a displaceable permanent magnet and which is guided on a linear guide, the ends of which are assigned a respective rotatable permanent magnet. By oppositely changing the polarization direction of the rotatable permanent magnets through 180°, the displaceable permanent magnet is pulled into the first or second position.

## Claims

### Claim 1

A camera shutter device, comprising:
a frame having two supports arranged opposite each other,
a linear sliding structure terminating at the supports, and
a shutter which, guided by the action of magnetic forces along the linear sliding structure in a sliding direction with alternating directional sense, jumps between a first position, in which it covers a transmission zone present between the supports, and a second position, in which it clears the transmission zone,
wherein:
the shutter contains one shutter blade or two shutter blades, exactly one sliding body being fixedly arranged on the shutter blade in each case, which sliding body is formed by a displaceable permanent magnet or contains a displaceable permanent magnet and is guided on a linear guide of the linear sliding structure in each case, each end of said linear guide having a rotatable permanent magnet assigned to it, which is firmly connected to a driven shaft of a rotary drive, which driven shaft is not aligned parallel to the sliding direction, wherein the polarization direction of the rotatable permanent magnet includes a right angle with the driven shaft.

### Claim 2 (depends on 1)

The camera shutter device according to claim 1, wherein the driven shaft is aligned at a right angle to the sliding direction.

### Claim 3 (depends on 1)

The camera shutter device according to claim 1, wherein the shutter contains exactly one shutter blade.

### Claim 4 (depends on 1)

The camera shutter device according to claim 1, wherein the shutter contains two shutter blades and the extension of the device resulting from the doubling of the shutter blades is a mirror-image design of the device according to the design with only one shutter blade.

### Claim 5 (depends on 1)

The camera shutter device according to claim 1, wherein the rotatable permanent magnet is connected to the driven shaft indirectly via a magnet holder and the magnet holder has a slot extending radially to the driven shaft, in which slot a rotation stop fixed with respect to the support engages.