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公开(公告)号：US20230072359A1
公开(公告)日：2023-03-09
申请号：US18056051
申请日：2022-11-16
Applicant: CANON KABUSHIKI KAISHA
Inventor： Taku Murotani , Mitsuhiro Obara , Hiroki Katayama , Atsushi Sano , Jun Nagatoshi , Chihiro Shirakawa , Tetsushi Uneme
Abstract: An image forming apparatus to form a toner image on a recording material includes a photosensitive member and an optical scanning unit. The optical scanning unit includes an optical scanning unit, an optical box, a cover member, and a moving unit movable to an outside of the image forming apparatus. The optical scanning unit and the moving unit are arranged so that the moving unit and the optical scanning unit are opposed to each other when the moving unit is located in an inside of the image forming apparatus. The optical scanning unit is disposed so as to allow a user to touch the optical scanning unit through a space generated in the inside of the image forming apparatus when the moving unit is moved to the outside of the image forming apparatus. Between the optical box and the cover member, the cover member is opposed to the moving unit.
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公开(公告)号：US10914940B2
公开(公告)日：2021-02-09
申请号：US16135967
申请日：2018-09-19
Applicant: CANON KABUSHIKI KAISHA
Inventor： Atsushi Sano
Abstract: The spot diameter of a laser beam emitted from a first light source, passing through a first stop member, and focused on an object to be scanned is smaller than the spot diameter of a laser beam emitted from a second light source, passing through a second stop member, and focused on an object to be scanned. After the focal depth at the spot diameter of the laser beam emitted from the first light source, passing through the first stop member, and focused on the object to be scanned is adjusted by moving a first holding member holding the first light source at least in the emission direction of the laser beam from the light source, the first holding member and a housing member are bonded with an adhesive, and the first holding member is positioned and fixed to the housing member.
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公开(公告)号：US12147032B1
公开(公告)日：2024-11-19
申请号：US18341715
申请日：2023-06-26
Applicant: CANON KABUSHIKI KAISHA
Inventor： Atsushi Sano , Jun Nagatoshi
Abstract: An optical scanning apparatus includes first and second light sources, a rotatable polygonal mirror, a motor, first and second mirrors, first and second lenses, and a casing. Within a mounting range, a top wall of an accommodating portion is provided with at least one projection projecting toward an opening of the accommodating portion. The projection extends from a first side wall to a second side wall of the accommodating portion. The top wall includes a recess formed opposite from the projection, and is free from a portion projecting toward the opening over a range from the first side wall to the second side wall, other than the projection in the mounting range. A free end portion of the projection is in a position remoter from the opening than a reflecting surface of the rotatable polygonal mirror is with respect to a rotational axis direction of the motor.
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公开(公告)号：US20220184735A1
公开(公告)日：2022-06-16
申请号：US17541884
申请日：2021-12-03
Applicant: CANON KABUSHIKI KAISHA
Inventor： Jun Nagatoshi , Ken-ichi Tomita , Atsushi Sano , Chihiro Shirakawa , Daisuke Hirata , Taro Ebisugi
IPC: B23K26/082 , B23K26/354
Abstract: A laser marking method of performing marking by irradiating an object made of a resin with laser light, the laser marking method including: a first step of melting of carbonizing a first region of the object; and a second step of engraving a mark by irradiating a second region in the first region with the laser light.
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公开(公告)号：US20220082972A1
公开(公告)日：2022-03-17
申请号：US17465317
申请日：2021-09-02
Applicant: CANON KABUSHIKI KAISHA
Inventor： Atsushi Sano
IPC: G03G15/00
Abstract: An image forming apparatus includes an exposure unit provided with a rotatable polygon mirror including a plurality of reflecting surfaces and scanning a light beam emitted from a light source, to expose a photosensitive member with the light beam according to an image information. A determining unit determines an end of lifetime of the exposure unit based on a detecting result of density of a toner image detected by two detecting units at a first timing and a detecting result of density of the toner image detected by the two detecting units at a second timing after the first timing.
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公开(公告)号：US20190361367A1
公开(公告)日：2019-11-28
申请号：US16410931
申请日：2019-05-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Atsushi Sano
IPC: G03G15/043 , G02B26/12 , G03G15/04 , G03G21/16
Abstract: An optical scanning apparatus includes an optical scanning unit which includes a first light source, a first rotatable polygonal mirror for reflecting the beam emitted from the first light source, a second light source, a second rotatable polygonal mirror for reflecting the beam emitted from the second light source;and a housing accommodating the polygonal mirrors. The housing includes only three fixed portions fixed to a fixing portion for fixing the optical scanning unit. The first rotatable polygonal mirror and the second rotatable polygonal mirror are disposed such that a rotational axis of the first rotatable polygonal mirror and a rotational axis of the second rotatable polygonal mirror are in a triangular area defined by lines connecting the three fixed portions, as viewed in a rotation axial direction of the first rotatable polygonal mirror.
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公开(公告)号：US11703788B2
公开(公告)日：2023-07-18
申请号：US17465317
申请日：2021-09-02
Applicant: CANON KABUSHIKI KAISHA
Inventor： Atsushi Sano
IPC: G03G15/00
CPC classification number: G03G15/5016 , G03G15/55
Abstract: An image forming apparatus includes an exposure unit provided with a rotatable polygon mirror including a plurality of reflecting surfaces for scanning a light beam emitted from a light source to expose a photosensitive member with the light beam according to image information. A determining unit determines an end of lifetime of the exposure unit based on a detecting result of density of a toner image detected by two detecting units at a first timing and a detecting result of density of the toner image detected by the two detecting units at a second timing after the first timing.
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公开(公告)号：US20190094530A1
公开(公告)日：2019-03-28
申请号：US16135967
申请日：2018-09-19
Applicant: CANON KABUSHIKI KAISHA
Inventor： Atsushi Sano
Abstract: The spot diameter of a laser beam emitted from a first light source, passing through a first stop member, and focused on an object to be scanned is smaller than the spot diameter of a laser beam emitted from a second light source, passing through a second stop member, and focused on an object to be scanned. After the focal depth at the spot diameter of the laser beam emitted from the first light source, passing through the first stop member, and focused on the object to be scanned is adjusted by moving a first holding member holding the first light source at least in the emission direction of the laser beam from the light source, the first holding member and a housing member are bonded with an adhesive, and the first holding member is positioned and fixed to the housing member.
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公开(公告)号：US20230341678A1
公开(公告)日：2023-10-26
申请号：US18341715
申请日：2023-06-26
Applicant: CANON KABUSHIKI KAISHA
Inventor： Atsushi Sano , Jun Nagatoshi
CPC classification number: G02B26/122 , G02B26/105 , G03G15/305 , G03G15/50
Abstract: An optical scanning apparatus includes first and second light sources, a rotatable polygonal mirror, a motor, first and second mirrors, first and second lenses, and a casing. Within a mounting range, a top wall of an accommodating portion is provided with at least one projection projecting toward an opening of the accommodating portion. The projection extends from a first side wall to a second side wall of the accommodating portion. The top wall includes a recess formed opposite from the projection, and is free from a portion projecting toward the opening over a range from the first side wall to the second side wall, other than the projection in the mounting range. A free end portion of the projection is in a position remoter from the opening than a reflecting surface of the rotatable polygonal mirror is with respect to a rotational axis direction of the motor.
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公开(公告)号：US11537058B2
公开(公告)日：2022-12-27
申请号：US17549222
申请日：2021-12-13
Applicant: CANON KABUSHIKI KAISHA
Inventor： Taku Murotani , Mitsuhiro Obara , Hiroki Katayama , Atsushi Sano , Jun Nagatoshi , Chihiro Shirakawa , Tetsushi Uneme
Abstract: An image forming apparatus to form a toner image on a recording material includes a photosensitive member and an optical scanning unit. The optical scanning unit includes an optical scanning unit, an optical box, a cover member, and a moving unit movable to an outside of the image forming apparatus. The optical scanning unit and the moving unit are arranged so that the moving unit and the optical scanning unit are opposed to each other when the moving unit is located in an inside of the image forming apparatus. The optical scanning unit is disposed so as to allow a user to touch the optical scanning unit through a space generated in the inside of the image forming apparatus when the moving unit is moved to the outside of the image forming apparatus. Between the optical box and the cover member, the cover member is opposed to the moving unit.
