# US 4,396,270 A · Camera having a photographing lens protection member

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- Number: US 4,396,270 A
- Document ID: US4396270A
- Status: Granted
- Kind: A
- Application number: 06/345,644
- Filed: 1982-02-04
- Granted: 1983-08-02
- Earliest claimed: 1981-02-13
- Assignees: Canon Kabushiki Kaisha
- Inventors: Toyotosi Suzuki
- Web page: https://patentgrep.com/patent/US4396270A

## CPC

- G03B 17/38: Releasing-devices separate from shutter (integral with shutter G03B9/08)
- G03B 17/42: Interlocking between shutter operation and advance of film or change of plate or cut-film
- 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 is provided with a protection member in front of the lens for opening or closing the photographing lens in order to protect the lens in such a manner that the shutter release is locked in case the protection member is not opened or the film has not been wound.

## Claims

### Claim 1

A camera comprising:
a photographing lens and a shutter release member;
a photographing lens protection member provided in front of said lens so as to open or close the lens in order to protect said photographing lens;
lock means for locking said shutter release member until film in said camera has been wound up; and
lock release prevention means for preventing the lock release of said lock means when said lens protection member is not in the opened state.

### Claim 2 (depends on 1)

A camera in accordance with claim 1, wherein said lock means comprise a lock member for preventing depression of said shutter release member and a lock release member for releasing the lock member.

### Claim 3 (depends on 1)

A camera in accordance with claim 1, wherein said lock release prevention means comprise an actuating member for opening or closing the lens protection member and a lock release prevention member operatively engaged with the actuating member.

### Claim 4 (depends on 1)

A camera in accordance with claim 1, wherein said lens protection member is operative to assume a totally opened or totally closed position, being unable to stop at an intermediate position therebetween.

### Claim 5 (depends on 3)

A camera in accordance with claim 3, wherein said actuating member is not capable of stopping at any position other than one determined in such a manner that the lens protection member assumes the totally opened or the totally closed state.

### Claim 6 (depends on 5)

A camera in accordance with claim 5, wherein said actuating member is rendered not capable of stopping at any position other than said determined position, by means of an urging member and a click mechanism.

### Claim 7

A camera comprising:
a photographing lens;
a shutter release member;
a lock member for preventing the depression of the shutter release member;
a lock release member for releasing the lock member;
a photographing lens protection member provided in front of the lens for opening and closing the lens in order to protect the lens;
an actuating member for opening or closing the lens protection member; and
a lock release prevention member operatively engaged with the actuating member.

### Claim 8 (depends on 7)

A camera in accordance with claim 7, wherein the actuating member includes an urging member and a click mechanism operating so as to bring the lens protection member into the totally opened or the totally closed state.