# US 9,039,305 B2 · Camera

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- Number: US 9,039,305 B2
- Document ID: US9039305B2
- Status: Granted
- Kind: B2
- Application number: 13/754,511
- Filed: 2013-01-30
- Published: 2013-08-08
- Granted: 2015-05-26
- Earliest claimed: 2012-02-03
- Assignees: Canon Kabushiki Kaisha
- Applicants: Canon Kabushiki Kaisha
- Inventors: Kazuaki Yamana
- Web page: https://patentgrep.com/patent/US9039305B2

## CPC

- G03B 19/12: Reflex cameras with single objective and a movable reflector or a partly-transmitting mirror
- 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 mirror holder includes a cam portion, and a rotating member includes a follower portion arranged to be able to trace the cam portion. When the mirror holder is at a mirror-down position, the follower portion traces a first region of the cam portion to urge the mirror holder toward the mirror-down position by an urging force of an urging member. When the mirror holder is at a mirror-up position, the follower portion traces a second region of the cam portion to urge the mirror holder toward the mirror-up position by the urging force of the urging member. When the mirror holder is at an intermediate position between the mirror-down position and the mirror-up position, a contact portion is contacted with an edge of a hole by the urging force of the urging member.

## Claims

### Claim 1

A camera comprising:
a mirror holder arranged to hold a mirror and being rotatable between a mirror-up position and a mirror-down position;
a mirror box;
an adjusting member arranged to adjust the mirror-down position of the mirror holder with rotation of the adjusting member relative to the mirror box;
a rotating member rotatably mounted to the adjusting member; and
an urging member arranged to urge the rotating member in one direction,
wherein a hole portion is formed on the mirror box and a cam portion is formed on the mirror holder,
wherein the rotating member has a contact portion arranged to be able to contact with an edge of the hole portion and a follower portion arranged to be able to follow the cam portion,
wherein in a case where the mirror holder is at the mirror-down position, the follower portion follows a first region of the cam portion to urge the mirror holder toward the mirror-down position by an urging force of the urging member,
wherein in a case where the mirror holder is at the mirror-up position, the follower portion follows a second region of the cam portion to urge the mirror holder toward the mirror-up position by the urging force of the urging member, and
wherein in a case where the mirror holder is at an intermediate position between the mirror-down position and the mirror-up position, the contact portion is contacted with the edge of the hole portion by the urging force of the urging member.

### Claim 2 (depends on 1)

The camera according to claim 1,
wherein in a case where the mirror holder is at the intermediate position between the mirror-down position and the mirror-up position, the follower portion follows a third region of the cam portion and the mirror holder is not urged toward the mirror-down position and toward the mirror-up position.

### Claim 3 (depends on 1)

The camera according to claim 1,
wherein the adjusting member has a limiting portion arranged to limit a rotatable range of the rotating member,
wherein in a case where the mirror holder is at the mirror-down position or the mirror-up position, the rotating member is located at a position where rotation of the rotating member is not limited by the limiting portion, and
wherein in a case where the mirror holder is bounced near at least one of the mirror-down position and the mirror-up position, the rotating member is located at a position where the rotation of the rotating member is limited by the limiting portion.

### Claim 4 (depends on 3)

The camera according to claim 3,
wherein in a case where the mirror holder is at the intermediate position between the mirror-down position and the mirror-up position, the contact portion comes into contact with the edge of the hole portion before the rotation of the rotating member is limited by the limiting portion.

### Claim 5 (depends on 3)

The camera according to claim 3,
wherein the limiting portion limits a rotation range of the rotating member upon the rotating member contacting with the adjusting member,
wherein in a case where the mirror holder is at the mirror-down position or the mirror-up position, the rotating member is not contacted with the adjusting member, and
wherein in a case where the mirror holder is bounced near the mirror-down position or near the mirror-up position, the rotating member is contacted with the adjusting member.

### Claim 6 (depends on 5)

The camera according to claim 5,
wherein in a case where the mirror holder is at the intermediate position between the mirror-down position and the mirror-up position, the contact portion comes into contact with the edge of the hole portion before the rotating member comes into contact with the adjusting member.