# US 12,769,183 B2 · Blade open-close device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,769,183 B2 - Document ID: US12769183B2 - Status: Granted - Kind: B2 - Application number: 18/761,312 - Filed: 2024-07-02 - Published: 2025-01-09 - Granted: 2026-10-20 - Earliest claimed: 2023-07-04 - Assignees: Nidec Precision Corporation - Applicants: Nidec Precision Corporation - Inventors: Ryosuke Ushio - Web page: https://patentgrep.com/patent/US12769183B2 ## CPC - G03B 9/26: incorporating cover blade or blades - 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 blade open-close device includes an aperture blade having an opening on an optical axis of a lens and extending in an intersecting direction intersecting with an optical axis direction of the optical axis of the lens, a blade movable in the intersecting direction, a drive moving the blade to a closing position to cover the opening or an opening position to uncover the opening, a transmission member transmitting a driving force of the drive to the blade, a body to which the aperture blade, the blade, the drive, and the transmission member are attached, and a restrictor restricting movement of the blade in the intersecting direction. The aperture blade and the transmission member are located between the body and the blade in the optical axis direction. The body has an upper surface facing the aperture blade and the transmission member. The restrictor is located on the upper surface. ## Claims ### Claim 1 A blade open-close device, comprising: an elongated member having an opening on an optical axis of an optical unit and extending in an intersecting direction intersecting with an optical axis direction in which the optical axis of the optical unit extends; a blade movable in the intersecting direction, the blade being configured to cover or uncover the opening; a drive configured to move the blade to one of a closing position to cover the opening or an opening position to uncover the opening; a transmission member configured to transmit a driving force generated by the drive to the blade; a body in which the elongated member, the blade, the drive, and the transmission member are located; and a restrictor configured to restrict movement of the blade in the intersecting direction, wherein the elongated member and the transmission member are located between the body and the blade in the optical axis direction, the body has a facing surface facing the elongated member and the transmission member, and the restrictor is located on the facing surface, wherein the restrictor includes a first restrictor and the first restrictor comes in contact with the blade to restrict the movement of the blade. ### Claim 2 (depends on 1) The blade open-close device according to claim 1, wherein the restrictor includes a second restrictor and the second restrictor comes in contact with the transmission member to restrict the movement of the blade. ### Claim 3 (depends on 2) The blade open-close device according to claim 2, wherein the first restrictor has a first restriction flat surface spaced farther from the elongated member than the facing surface in the optical axis direction and facing the elongated member, and a first step between the facing surface of the body and the first restriction flat surface. ### Claim 4 (depends on 3) The blade open-close device according to claim 3, wherein the body has a body opening overlapping the opening in the optical axis direction, and the first step is located between a first end of the blade and the body opening in the intersecting direction when the blade is at the opening position. ### Claim 5 (depends on 4) The blade open-close device according to claim 4, wherein the first step has a first connection surface connecting the first restriction flat surface and the facing surface and extending in a direction intersecting with the intersecting direction, and the movement of the blade in the intersecting direction is restricted when the first end of the blade comes in contact with the first connection surface. ### Claim 6 (depends on 3) The blade open-close device according to claim 3, wherein the first restrictor includes a protrusion protruding toward the blade, and the protrusion is received in a hole in the blade to restrict the movement of the blade in the intersecting direction. ### Claim 7 (depends on 6) The blade open-close device according to claim 6, wherein the protrusion is spaced from the first step in the intersecting direction. ### Claim 8 (depends on 2) The blade open-close device according to claim 2, wherein the transmission member includes a lever blade configured to transmit a driving force to the blade and a partition located between the lever blade and the body in the optical axis direction, and the second restrictor restricts movement of the lever blade. ### Claim 9 (depends on 8) The blade open-close device according to claim 8, wherein the second restrictor has a placement surface on which the partition is located, a second restriction flat surface spaced farther from the elongated member than the placement surface in the optical axis direction and facing the elongated member, and a second step between the placement surface and the second restriction flat surface. ### Claim 10 (depends on 9) The blade open-close device according to claim 9, wherein the lever blade rotates about a rotational shaft located on the second restriction flat surface, the second step has a second connection surface connecting the placement surface and the second restriction flat surface, and the second connection surface extends in a direction intersecting with a rotation direction of the lever blade. ### Claim 11 A blade open-close device, comprising: an elongated member having an opening on an optical axis of an optical unit and extending in an intersecting direction intersecting with an optical axis direction in which the optical axis of the optical unit extends; a blade movable in the intersecting direction, the blade being configured to cover or uncover the opening; a drive configured to move the blade to one of a closing position to cover the opening or an opening position to uncover the opening; a transmission member configured to transmit a driving force generated by the drive to the blade; a body in which the elongated member, the blade, the drive, and the transmission member are located; and a restrictor configured to restrict movement of the blade in the intersecting direction, wherein the elongated member and the transmission member are located between the body and the blade in the optical axis direction, the body has a facing surface facing the elongated member and the transmission member, and the restrictor is located on the facing surface, wherein a second restrictor comes in contact with the transmission member to restrict the movement of the blade. ### Claim 12 (depends on 11) The blade open-close device according to claim 11, wherein the restrictor includes a first restrictor and the second restrictor, the first restrictor comes in contact with the blade to restrict the movement of the blade. ### Claim 13 (depends on 12) The blade open-close device according to claim 12, wherein the first restrictor has a first restriction flat surface spaced farther from the elongated member than the facing surface in the optical axis direction and facing the elongated member, and a first step between the facing surface of the body and the first restriction flat surface. ### Claim 14 (depends on 13) The blade open-close device according to claim 13, wherein the body has a body opening overlapping the opening in the optical axis direction, and the first step is located between a first end of the blade and the body opening in the intersecting direction when the blade is at the opening position. ### Claim 15 (depends on 14) The blade open-close device according to claim 14, wherein the first step has a first connection surface connecting the first restriction flat surface and the facing surface and extending in a direction intersecting with the intersecting direction, and the movement of the blade in the intersecting direction is restricted when the first end of the blade comes in contact with the first connection surface. ### Claim 16 (depends on 13) The blade open-close device according to claim 13, wherein the first restrictor includes a protrusion protruding toward the blade, and the protrusion is received in a hole in the blade to restrict the movement of the blade in the intersecting direction. ### Claim 17 (depends on 16) The blade open-close device according to claim 16, wherein the protrusion is spaced from the first step in the intersecting direction. ### Claim 18 (depends on 12) The blade open-close device according to claim 12, wherein the transmission member includes a lever blade configured to transmit a driving force to the blade and a partition located between the lever blade and the body in the optical axis direction, and the second restrictor restricts movement of the lever blade. ### Claim 19 (depends on 18) The blade open-close device according to claim 18, wherein the second restrictor has a placement surface on which the partition is located, a second restriction flat surface spaced farther from the elongated member than the placement surface in the optical axis direction and facing the elongated member, and a second step between the placement surface and the second restriction flat surface. ### Claim 20 (depends on 19) The blade open-close device according to claim 19, wherein the lever blade rotates about a rotational shaft located on the second restriction flat surface, the second step has a second connection surface connecting the placement surface and the second restriction flat surface, and the second connection surface extends in a direction intersecting with a rotation direction of the lever blade.