Patents by Inventor Jun Nagatoshi
Jun Nagatoshi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10281834Abstract: In one embodiment, an optical scanning device includes a board and a light receiving member, the positional accuracy of which is improved. When a length in a scanning direction and a length in an intersection direction of a body portion of the light receiving member are denoted by Lx0 and Ly0, respectively, and a length in the scanning direction and a length in the intersection direction of a through-hole formed in the board are denoted by Lx1 and Ly1, respectively, the lengths Lx0, Ly0, Lx1, and Ly1 satisfy the following formula: (Lx1?Lx0)>(Ly1?Ly0).Type: GrantFiled: July 18, 2017Date of Patent: May 7, 2019Assignee: Canon Kabushiki KaishaInventors: Jun Nagatoshi, Mitsuhiro Ohta, Shunsuke Tanaka
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Patent number: 10185242Abstract: There is a demand for an inexpensive optical scanning apparatus. An optical scanning apparatus includes a light source configured to emit a laser light flux, a deflection unit configured to deflect the laser light flux emitted from the light source, and a light reception member configured in such a manner that the laser light flux reflected by the deflection unit is incident thereon. The light source emits the laser light flux tilted by a predetermined angle with respect to a horizontal direction toward the deflection unit. The light reception member is disposed above or below the light source, and the laser light flux reflected by the deflection unit and tilted by the predetermined angle with respect to the horizontal direction is incident on the light reception member.Type: GrantFiled: March 8, 2018Date of Patent: January 22, 2019Assignee: Canon Kabushiki KaishaInventor: Jun Nagatoshi
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Publication number: 20180259876Abstract: There is a demand for an inexpensive optical scanning apparatus. An optical scanning apparatus includes a light source configured to emit a laser light flux, a deflection unit configured to deflect the laser light flux emitted from the light source, and a light reception member configured in such a manner that the laser light flux reflected by the deflection unit is incident thereon. The light source emits the laser light flux tilted by a predetermined angle with respect to a horizontal direction toward the deflection unit. The light reception member is disposed above or below the light source, and the laser light flux reflected by the deflection unit and tilted by the predetermined angle with respect to the horizontal direction is incident on the light reception member.Type: ApplicationFiled: March 8, 2018Publication date: September 13, 2018Inventor: Jun Nagatoshi
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Patent number: 9854120Abstract: An optical scanning apparatus includes a deflector for scanningly deflecting a beam; a scanning lens for imaging the beam deflected by the deflector on a surface; a casing for a light source, the deflector and the lens; and an elastic member urging the lens toward the casing along an optical axis. The lens is provided with an abutment at a beam emergent side of the lens, the abutment abutting to the casing, and is provided with a limiting portion at a side opposite from the emergent side, the limiting portion limiting movement in the opposite direction. The elastic member and the limiting portion limits the movement of the lens in the direction opposite to the direction of the lens. When the lens contacts a positioning portion of the casing, a gap is provided between the elastic member and the limiting portion with respect to the direction.Type: GrantFiled: November 14, 2016Date of Patent: December 26, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Yoshihiko Tanaka, Jun Nagatoshi, Tetsuya Nishiguchi
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Publication number: 20170315468Abstract: In one embodiment, an optical scanning device includes a board and a light receiving member, the positional accuracy of which is improved. When a length in a scanning direction and a length in an intersection direction of a body portion of the light receiving member are denoted by Lx0 and Ly0, respectively, and a length in the scanning direction and a length in the intersection direction of a through-hole formed in the board are denoted by Lx1 and Ly1, respectively, the lengths Lx0, Ly0, Lx1, and Ly1 satisfy the following formula: (Lx1?Lx0)>(Ly1?Ly0).Type: ApplicationFiled: July 18, 2017Publication date: November 2, 2017Inventors: Jun Nagatoshi, Mitsuhiro Ohta, Shunsuke Tanaka
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Patent number: 9740135Abstract: In one embodiment, an optical scanning device includes a board and a light receiving member, the positional accuracy of which is improved. When a length in a scanning direction and a length in an intersection direction of a body portion of the light receiving member are denoted by Lx0 and Ly0, respectively, and a length in the scanning direction and a length in the intersection direction of a through-hole formed in the board are denoted by Lx1 and Ly1, respectively, the lengths Lx0, Ly0, Lx1, and Ly1 satisfy the following formula: (Lx1?Lx0)>(Ly1?Ly0).Type: GrantFiled: February 12, 2016Date of Patent: August 22, 2017Assignee: Canon Kabushiki KaishaInventors: Jun Nagatoshi, Mitsuhiro Ohta, Shunsuke Tanaka
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Publication number: 20170142283Abstract: An optical scanning apparatus includes a deflector for scanningly deflecting a beam; a scanning lens for imaging the beam deflected by the deflector on a surface; a casing for a light source, the deflector and the lens; and an elastic member urging the lens toward the casing along an optical axis. The lens is provided with an abutment at a beam emergent side of the lens, the abutment abutting to the casing, and is provided with a limiting portion at a side opposite from the emergent side, the limiting portion limiting movement in the opposite direction. The elastic member and the limiting portion limits the movement of the lens in the direction opposite to the direction of the lens. When the lens contacts a positioning portion of the casing, a gap is provided between the elastic member and the limiting portion with respect to the direction.Type: ApplicationFiled: November 14, 2016Publication date: May 18, 2017Inventors: Yoshihiko Tanaka, Jun Nagatoshi, Tetsuya Nishiguchi
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Patent number: 9581929Abstract: Provided is an optical scanning apparatus, including: an optical deflector having a polygon mirror reflecting a light flux emitted from a light source to carry out scanning, a drive unit rotating the polygon mirror about a rotation shaft, and a board supporting the drive unit; an optical box to which the board is fixed; two holes provided in the optical box, through which two screws fixing the board are inserted, respectively; two bearing surfaces provided on the optical box at positions around the two holes, respectively, the two bearing surfaces supporting the board; and an abutment portion provided on the optical box and abutting against a portion that is prevented from being pressed by the two screws in the board which is sandwiched between the two screws and the two bearing surfaces so as to be fixed to the optical box.Type: GrantFiled: July 31, 2015Date of Patent: February 28, 2017Assignee: CANON KABUSHIKI KAISHAInventors: Jun Nagatoshi, Yoshihiko Tanaka, Hiroyuki Fukuhara, Naoki Matsushita
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Patent number: 9558431Abstract: An optical scanning apparatus includes an optical box having a top surface that is constituted by a single lid. A first surface of the top surface is disposed closer to a rotary polygon mirror than a second surface and is disposed closer to a bottom surface of the optical box than an edge portion of a light deflector positioned farthest from the bottom surface. A third surface of a convex portion of the top surface is positioned farther from the bottom surface than the first surface. A lower edge portion of the convex portion is disposed outside a circumscribed circle of the rotary polygon mirror.Type: GrantFiled: February 10, 2016Date of Patent: January 31, 2017Assignee: Canon Kabushiki KaishaInventors: Jun Nagatoshi, Mitsuhiro Ohta
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Publication number: 20160241734Abstract: An optical scanning apparatus according to the present invention includes a light source, and a substrate including an electric circuit for causing the light source to emit light. The number of holes in the substrate into which terminals in the light source are respectively inserted is larger than the number of the terminals, so that the substrate can also be used for another light source including a different number of terminals.Type: ApplicationFiled: February 12, 2016Publication date: August 18, 2016Inventors: Jun Nagatoshi, Hiroyuki Fukuhara
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Publication number: 20160238965Abstract: In one embodiment, an optical scanning device includes a board and a light receiving member, the positional accuracy of which is improved. When a length in a scanning direction and a length in an intersection direction of a body portion of the light receiving member are denoted by Lx0 and Ly0, respectively, and a length in the scanning direction and a length in the intersection direction of a through-hole formed in the board are denoted by Lx1 and Ly1, respectively, the lengths Lx0, Ly0, Lx1, and Ly1 satisfy the following formula: (Lx1?Lx0)>(Ly1?Ly0).Type: ApplicationFiled: February 12, 2016Publication date: August 18, 2016Inventors: Jun Nagatoshi, Mitsuhiro Ohta, Shunsuke Tanaka
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Publication number: 20160239730Abstract: An optical scanning apparatus includes an optical box having a top surface that is constituted by a single lid. A first surface of the top surface is disposed closer to a rotary polygon mirror than a second surface and is disposed closer to a bottom surface of the optical box than an edge portion of a light deflector positioned farthest from the bottom surface. A third surface of a convex portion of the top surface is positioned farther from the bottom surface than the first surface. A lower edge portion of the convex portion is disposed outside a circumscribed circle of the rotary polygon mirror.Type: ApplicationFiled: February 10, 2016Publication date: August 18, 2016Inventors: Jun Nagatoshi, Mitsuhiro Ohta
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Publication number: 20150338768Abstract: Provided is an optical scanning apparatus, including: an optical deflector having a polygon mirror reflecting a light flux emitted from a light source to carry out scanning, a drive unit rotating the polygon mirror about a rotation shaft, and a board supporting the drive unit; an optical box to which the board is fixed; two holes provided in the optical box, through which two screws fixing the board are inserted, respectively; two bearing surfaces provided on the optical box at positions around the two holes, respectively, the two bearing surfaces supporting the board; and an abutment portion provided on the optical box and abutting against a portion that is prevented from being pressed by the two screws in the board which is sandwiched between the two screws and the two bearing surfaces so as to be fixed to the optical box.Type: ApplicationFiled: July 31, 2015Publication date: November 26, 2015Inventors: Jun Nagatoshi, Yoshihiko Tanaka, Hiroyuki Fukuhara, Naoki Matsushita
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Patent number: 9170524Abstract: The image forming apparatus includes a determination unit configured to determine whether or not a polygon mirror has converged to the number of rotations that allows image formation to be performed, and the determination unit is capable of detecting a first timing and a second timing and determines that the polygon mirror has converged to a number of rotations that allows the image formation to be performed based on an earlier one of the first timing and the second timing.Type: GrantFiled: October 30, 2014Date of Patent: October 27, 2015Assignee: Canon Kabushiki KaishaInventors: Jun Nagatoshi, Akihiro Fukutomi, Daisuke Miyagawa, Naoki Inoue
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Patent number: 9128291Abstract: Provided is an optical scanning apparatus, including: an optical deflector having a polygon mirror reflecting a light flux emitted from a light source to carry out scanning, a drive unit rotating the polygon mirror about a rotation shaft, and a board supporting the drive unit; an optical box to which the board is fixed; two holes provided in the optical box, through which two screws fixing the board are inserted, respectively; two bearing surfaces provided on the optical box at positions around the two holes, respectively, the two bearing surfaces supporting the board; and an abutment portion provided on the optical box and abutting against a portion that is prevented from being pressed by the two screws in the board which is sandwiched between the two screws and the two bearing surfaces so as to be fixed to the optical box.Type: GrantFiled: December 4, 2013Date of Patent: September 8, 2015Assignee: CANON KABUSHIKI KAISHAInventors: Jun Nagatoshi, Yoshihiko Tanaka, Hiroyuki Fukuhara, Naoki Matsushita
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Publication number: 20150055967Abstract: The image forming apparatus includes a determination unit configured to determine whether or not a polygon mirror has converged to the number of rotations that allows image formation to be performed, and the determination unit is capable of detecting a first timing and a second timing and determines that the polygon mirror has converged to a number of rotations that allows the image formation to be performed based on an earlier one of the first timing and the second timing.Type: ApplicationFiled: October 30, 2014Publication date: February 26, 2015Inventors: Jun Nagatoshi, Akihiro Fukutomi, Daisuke Miyagawa, Naoki Inoue
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Patent number: 8902271Abstract: The image forming apparatus includes a determination unit configured to determine whether or not a polygon mirror has converged to the number of rotations that allows image formation to be performed, and the determination unit is capable of detecting a first timing and a second timing and determines that the polygon mirror has converged to a number of rotations that allows the image formation to be performed based on an earlier one of the first timing and the second timing.Type: GrantFiled: March 25, 2014Date of Patent: December 2, 2014Assignee: Canon Kabushiki KaishaInventors: Jun Nagatoshi, Akihiro Fukutomi, Daisuke Miyagawa, Naoki Inoue
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Publication number: 20140292996Abstract: The image forming apparatus includes a determination unit configured to determine whether or not a polygon mirror has converged to the number of rotations that allows image formation to be performed, and the determination unit is capable of detecting a first timing and a second timing and determines that the polygon mirror has converged to a number of rotations that allows the image formation to be performed based on an earlier one of the first timing and the second timing.Type: ApplicationFiled: March 25, 2014Publication date: October 2, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Jun Nagatoshi, Akihiro Fukutomi, Daisuke Miyagawa, Naoki Inoue
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Publication number: 20140160217Abstract: Provided is an optical scanning apparatus, including: an optical deflector having a polygon mirror reflecting a light flux emitted from a light source to carry out scanning, a drive unit rotating the polygon mirror about a rotation shaft, and a board supporting the drive unit; an optical box to which the board is fixed; two holes provided in the optical box, through which two screws fixing the board are inserted, respectively; two bearing surfaces provided on the optical box at positions around the two holes, respectively, the two bearing surfaces supporting the board; and an abutment portion provided on the optical box and abutting against a portion that is prevented from being pressed by the two screws in the board which is sandwiched between the two screws and the two bearing surfaces so as to be fixed to the optical box.Type: ApplicationFiled: December 4, 2013Publication date: June 12, 2014Applicant: CANON KABUSHIKI KAISHAInventors: Jun Nagatoshi, Yoshihiko Tanaka, Hiroyuki Fukuhara, Naoki Matsushita
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Patent number: 8174746Abstract: An oscillator device includes at least one movable element supported for oscillatory motion around a rotational axis, and a first rectifying member for suppressing generation of a spiral airflow during oscillation of the movable element, the first rectifying member being provided to occupy a space of at least a portion of a spiral airflow generating region which might otherwise be created when the first rectifying member is not provided there.Type: GrantFiled: July 11, 2008Date of Patent: May 8, 2012Assignee: Canon Kabushiki KaishaInventors: Suguru Miyagawa, Jun Nagatoshi, Yasuhiro Shimada