# US 5,708,885 A · Light intercepting device of a lens shutter type of camera > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,708,885 A - Document ID: US5708885A - Status: Granted - Kind: A - Application number: 08/781,600 - Filed: 1997-01-09 - Granted: 1998-01-13 - Earliest claimed: 1996-01-26 - Assignees: Asahi Kogaku Kogyo Kabushiki Kaisha - Inventors: Hiroshi Nomura; Kazuyoshi Azegami; Takamitsu Sasaki - Web page: https://patentgrep.com/patent/US5708885A ## CPC - G03B 7/097: for control of both exposure time and aperture - G02B 7/08: adapted to co-operate with a remote control mechanism - G02B 7/102: {controlled by a microcomputer (cameras with interchangeable lenses G03B17/14)} - G03B 7/10: a servo-motor providing energy to move the setting member - G03B 9/22: each moving in one direction to open and then in opposite direction to close, e.g. iris type - G03B 9/24: Adjusting size of aperture formed by members when fully open so as to constitute a virtual diaphragm that is adjustable - G03B 11/043: {Protective lens closures or lens caps built into cameras} - G03B 17/02: Bodies - G03B 17/04: collapsible, foldable or extensible, e.g. book type - G03B 17/14: interchangeably - H05K 3/281: {by means of a preformed insulating foil (H05K3/284 takes precedence)} - 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) - G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A shutter arrangement for a camera which includes a plurality of shutter blades each having a rotational center and an opening formed proximate to the rotational center, a supporting member which supports each of the plurality of shutter blades to be rotatable about the rotational center and a ring member driven to rotate about an optical axis of a photographic lens. The ring member includes a plurality of pins each engaging with a corresponding one of the openings. A light intercepting sheet is also provided which includes a plurality of holes in which the plurality of pins are respectively inserted, so that the ring member and the light intercepting sheet rotate together as a whole about the optical axis when the ring member is driven to rotate. ## Claims ### Claim 1 A shutter arrangement for a camera, comprising: a plurality of shutter blades each having a rotational center and an opening formed proximate to said rotational center; a supporting member which supports each of said plurality of shutter blades to be rotatable about said rotational center; a ring member driven to rotate about an optical axis of a photographic lens, said ring member comprising a plurality of pins each engaging with a corresponding one of said openings; and a light intercepting sheet provided with a plurality of holes in which said plurality of pins are respectively inserted, so that said ring member and said light intercepting sheet rotate together as a whole about said optical axis when said ring member is driven to rotate. ### Claim 2 (depends on 1) The shutter arrangement according to claim 1, wherein each of said plurality of holes is smaller than a corresponding one of said openings. ### Claim 3 (depends on 1) The shutter arrangement according to claim 1, wherein said light intercepting sheet is formed in the shape of a ring which surrounds a photographic light path of said photographic lens. ### Claim 4 (depends on 1) The shutter arrangement according to claim 1, wherein said supporting member, said plurality of shutter blades and said light intercepting sheet are positioned in this order in a direction of said optical axis from an object side towards an image side. ### Claim 5 (depends on 1) The shutter arrangement according to claim 1, wherein said supporting member, said light intercepting sheet and said plurality of shutter blades are positioned in this order in a direction of said optical axis from an object side towards an image side. ### Claim 6 (depends on 1) The shutter arrangement according to claim 1, wherein said ring member is positioned in front of said supporting member. ### Claim 7 (depends on 1) The shutter arrangement according to claim 1, further comprising a plurality of pivotal shafts formed on said supporting member, and a plurality of pivotal holes each formed at a corresponding one of said rotational centers of said plurality of shutter blades, wherein said plurality of pivotal shafts are respectively inserted in said plurality of pivotal holes. ### Claim 8 (depends on 1) The shutter arrangement according to claim 1, wherein said light intercepting sheet is made of an opaque elastic member comprising a synthetic resin. ### Claim 9 (depends on 1) The shutter arrangement according to claim 1, wherein said plurality of shutter blades are opened and closed when said ring member is driven to rotate about said optical axis in forward and reverse rotational directions, respectively. ### Claim 10 (depends on 1) The shutter arrangement according to claim 1, wherein each of said plurality of holes is formed to have a diameter substantially equal to that of a corresponding one of said plurality of pins. ### Claim 11 (depends on 1) The shutter arrangement according to claim 1, wherein said light intercepting sheet comprises a plurality of light intercepting sheets provided with said plurality of holes, respectively. ### Claim 12 A shutter arrangement for a camera, comprising: a shutter supporting annular member having a plurality of pivotal shafts extending in a direction of an optical axis of said photographic lens; a plurality of shutter blades, each of said plurality of shutter blades being pivoted at a corresponding one of said plurality of pivotal shafts, said plurality of shutter blades each defining an elongated hole; a ring member driven to rotate about said optical axis, said ring member comprising a plurality of pins each engaging with a corresponding one of said elongated holes; and a ring-shaped light intercepting sheet provided with a plurality of holes in which said plurality of pins are respectively inserted, so that said ring member and said light intercepting sheet rotate together about said optical axis when said ring member is driven to rotate. ### Claim 13 A shutter arrangement for a camera, comprising: at least one shutter blade comprising a rotational center and an opening formed proximate to said rotational center; a supporting member which supports said at least one shutter blade to be rotatable about said rotational center; a ring member driven to rotate about an optical axis of a photographic lens, said ring member comprising at least one pin engaging with said opening; and a light intercepting sheet provided with at least one hole in which said at least one pin is tightly inserted, so that said ring member and said light intercepting sheet rotate together about said optical axis when said ring member is driven to rotate.