Patents by Inventor Tomohiro Egawa

Tomohiro Egawa 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).

  • Publication number: 20210368078
    Abstract: An optical assembly includes an optical element including a reflection surface to reflect light in a first axis direction, a holder to hold the optical element, a case to support the holder, a first swing mechanism to swing the holder around a first swing axis, and a second swing mechanism to swing the holder around a second swing axis perpendicular to the first swing axis. The holder includes first and second protrusions. The case includes first and second recesses. Each of the recesses includes a first side surface located on one side in the axial direction of the second swing axis and a second side surface located on the other side with respect to the corresponding protrusion. At least one of the first and second side surfaces includes an inclined surface inclined with respect to the second swing axis.
    Type: Application
    Filed: May 10, 2021
    Publication date: November 25, 2021
    Inventors: Takayuki IWASE, Tomohiro EGAWA, Keishi OTSUBO, Kazuhiro SAZAI, Genki TANAKA
  • Patent number: 11148892
    Abstract: A sheet conveying device includes a position detector configured to detect a position of a side end portion of a conveyance target medium, a position adjuster configured to move in at least one of a width direction of the conveyance target medium and a rotation direction of the conveyance target medium within a plane of sheet conveyance, while conveying the conveyance target medium, and adjust a position of the conveyance target medium, according to the position of the side end portion of the conveyance target medium detected by the position detector, a transfer rotary body disposed downstream from the position adjuster in a sheet conveying direction and having a receiver mounted on the rotary body to receive the conveyance target medium, and circuitry configured to change a rotation speed of the transfer rotary body according to the position of the conveyance target medium after adjusted by the position adjuster.
    Type: Grant
    Filed: February 7, 2019
    Date of Patent: October 19, 2021
    Assignee: RICOH COMPANY, LTD.
    Inventors: Tomohiro Egawa, Yuichiro Maeyama, Motoharu Takahashi
  • Publication number: 20210294111
    Abstract: In an optical unit, a first swing mechanism swings a holder with reference to the y-axis direction, and a second swing mechanism swings the holder with reference to the z-axis direction. A case has a first recess that accommodates at least a part of a first protrusion of the holder and a second recess that accommodates at least a part of a second protrusion of the holder. The first recess has a first side surface located on one side in the y-axis direction of the first protrusion, a second side surface located on the other side in the y-axis direction of the first protrusion, and a bottom surface. The second recess has a first side surface located on one side in the y-axis direction of the second protrusion, a second side surface located on the other side in the y-axis direction of the second protrusion, and a bottom surface.
    Type: Application
    Filed: February 15, 2021
    Publication date: September 23, 2021
    Inventors: Tomohiro EGAWA, Keishi OTSUBO, Kazuhiro SAZAI, Genki TANAKA, Takayuki IWASE
  • Publication number: 20210251082
    Abstract: An optical unit includes a movable body including an optical module, a fixed body, a support mechanism, a flexible printed circuit board, and a positioning part. A bent part of the flexible printed circuit board has a first bent portion closest to a connection part between the connection part and the positioning part along an extension direction, and a second bent portion close to the connection part next to the first bent portion between the connection part and the positioning part along the extension direction. The second bent portion is located on a reference plane or on a side different from the side where the connection part is located with respect to the reference plane.
    Type: Application
    Filed: February 5, 2021
    Publication date: August 12, 2021
    Inventors: Shinri ONO, Tomohiro EGAWA, Genki TANAKA, Soichiro KIMURA, Tsungting HSIEH
  • Publication number: 20210251081
    Abstract: An optical unit includes a movable body including an optical module, a fixed body, a support mechanism, a flexible printed circuit board, and a fixing part. The fixing part is superposed on a bent part formed by bending the flexible printed circuit board. At least a part of the fixing part is fixed to the bent part of the flexible printed circuit board.
    Type: Application
    Filed: February 5, 2021
    Publication date: August 12, 2021
    Inventors: Soichiro KIMURA, Tomohiro EGAWA, Genki TANAKA, Shinri ONO, Tsungting HSIEH, Tsutomu ARAI, Shogo KASAHARA, Shinji HATANO
  • Publication number: 20210240001
    Abstract: An optical unit with a shake correction function has a shake correction function for correcting a shake of an optical module. The optical unit with a shake correction function includes: a movable body including the optical module; a fixed body disposed outward of the movable body in a radial direction with respect to an optical axis of the optical module; and a support part disposed between the movable body and the fixed body in the radial direction and structured to support the movable body such that the movable body is swingable relative to the fixed body. The movable body and the support part or the support part and the fixed body have, in a pair, a swing mechanism structured to allow the movable body to swing relative to the fixed body. The swing mechanism includes a protruded spherical portion and a recessed spherical portion that is larger in radius of curvature than the protruded spherical portion.
    Type: Application
    Filed: January 28, 2021
    Publication date: August 5, 2021
    Inventors: Genki TANAKA, Tomohiro EGAWA, Takayuki IWASE, Kazuhiro SAZAI, Tsutomu ARAI, Shinji MINAMISAWA, Takeshi SUE
  • Publication number: 20210240002
    Abstract: An optical unit with an image stabilization function includes a movable body having an annular holder for holding a camera module, a swing support mechanism for swingably supporting the movable body, and a fixing body for supporting the movable body with the swing support mechanism interposed between them. The holder includes three or more of a plurality of protrusions that project radially. The fixing body includes a plurality of arc surfaces that come into contact with each of the plurality of protrusions from the outer peripheral side. The swing support mechanism includes the plurality of protrusions and the plurality of arc surfaces. The arc surface is a concave curved surface obtained by transferring part of a virtual spherical surface centered on a preset swing center point.
    Type: Application
    Filed: January 28, 2021
    Publication date: August 5, 2021
    Inventors: Kazuhiro SAZAI, Tsutomu ARAI, Tomohiro EGAWA, Shinji MINAMISAWA, Takayuki IWASE, Takeshi SUE, Genki TANAKA
  • Publication number: 20210240003
    Abstract: An optical assembly includes a movable body that includes an optical module, a frame body radially outward of the movable body, and support portions that swingably support the movable body with respect to the frame body. Each of the support portions includes a guide portion between the movable body and the frame body to support the movable body, and a preload portion that pushes the guide portion toward the movable body. A radially inner end portion of the preload portion is connected to a radially outer end portion of the guide portion. A radially outer end portion of the preload portion is supported by the frame body. One of the movable body and the guide portion includes a first convex surface, and the other includes a first concave surface in contact with the first convex surface.
    Type: Application
    Filed: January 29, 2021
    Publication date: August 5, 2021
    Inventors: Kazuhiro SAZAI, Tomohiro EGAWA, Takayuki IWASE, Genki TANAKA, Tsutomu ARAI, Shinji MINAMISAWA, Takeshi SUE
  • Patent number: 10875730
    Abstract: A sheet conveying device includes a detector configured to detect an attitude of a conveyance target medium, a corrector configured to perform a correcting operation based on a detection result of the detector, and circuitry configured to calculate an angular displacement correction amount and a lateral displacement correction amount of the conveyance target medium, cause the corrector to perform the correcting operation in a direction perpendicular to a sheet conveying direction, based on the lateral displacement correction amount, after the corrector grips the conveyance target medium, and cause the corrector to rotate by the angular displacement correction amount of the conveyance target medium before the corrector grips the conveyance target medium and to perform the correcting operation in a direction of rotation of the conveyance target medium, based on the angular displacement correction amount, after the corrector grips the conveyance target medium.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: December 29, 2020
    Assignee: RICOH COMPANY, LTD.
    Inventors: Eri Uchida, Motoharu Takahashi, Yuichiro Maeyama, Tomohiro Egawa
  • Publication number: 20200156889
    Abstract: A sheet conveying device includes a sheet conveyor, a guide, a rotary conveyor, a gripper, and an adjuster. The sheet conveyor is configured to convey a sheet. The guide is configured to guide the sheet conveyed by the sheet conveyor. The rotary conveyor is disposed downstream from the guide in a sheet conveyance direction. The gripper is mounted on the rotary conveyor, the gripper configured to grip a leading end of the sheet. The adjuster is configured to adjust a sheet entering range of the gripper to which the leading end of the sheet enters, along with conveyance of the sheet conveyor, in a direction intersecting a sheet surface.
    Type: Application
    Filed: November 19, 2019
    Publication date: May 21, 2020
    Applicant: Ricoh Company, Ltd.
    Inventor: Tomohiro Egawa
  • Publication number: 20190283998
    Abstract: A sheet conveying device includes a detector configured to detect an attitude of a conveyance target medium, a corrector configured to perform a correcting operation based on a detection result of the detector, and circuitry configured to calculate an angular displacement correction amount and a lateral displacement correction amount of the conveyance target medium, cause the corrector to perform the correcting operation in a direction perpendicular to a sheet conveying direction, based on the lateral displacement correction amount, after the corrector grips the conveyance target medium, and cause the corrector to rotate by the angular displacement correction amount of the conveyance target medium before the corrector grips the conveyance target medium and to perform the correcting operation in a direction of rotation of the conveyance target medium, based on the angular displacement correction amount, after the corrector grips the conveyance target medium.
    Type: Application
    Filed: March 1, 2019
    Publication date: September 19, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Eri UCHIDA, Motoharu TAKAHASHI, Yuichiro MAEYAMA, Tomohiro EGAWA
  • Publication number: 20190276258
    Abstract: A sheet conveying device includes a position detector configured to detect a position of a side end portion of a conveyance target medium, a position adjuster configured to move in at least one of a width direction of the conveyance target medium and a rotation direction of the conveyance target medium within a plane of sheet conveyance, while conveying the conveyance target medium, and adjust a position of the conveyance target medium, according to the position of the side end portion of the conveyance target medium detected by the position detector, a transfer rotary body disposed downstream from the position adjuster in a sheet conveying direction and having a receiver mounted on the rotary body to receive the conveyance target medium, and circuitry configured to change a rotation speed of the transfer rotary body according to the position of the conveyance target medium after adjusted by the position adjuster.
    Type: Application
    Filed: February 7, 2019
    Publication date: September 12, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Tomohiro Egawa, Yuichiro MAEYAMA, Motoharu TAKAHASHI
  • Publication number: 20190241385
    Abstract: An image forming apparatus, in which a method of correcting a positional deviation of a sheet is performed, includes a detecting device to detect a position of the sheet, a pair of sheet conveying bodies to convey the sheet and correct the positional deviation of the sheet, an image forming device to form an image on the sheet, and circuitry to calculate a first positional deviation amount of the sheet based on a first detection result of the detecting device, cause the pair of sheet conveying bodies to correct the positional deviation of the sheet based on the first positional deviation amount, calculate a second positional deviation amount of the sheet based on a second detection result of the detecting device, and cause the image forming device to correct the positional deviation of an image forming position on the sheet based on the second positional deviation amount.
    Type: Application
    Filed: January 25, 2019
    Publication date: August 8, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Takaaki KANEKO, Motoharu TAKAHASHI, Yuichiro MAEYAMA, Tomohiro EGAWA
  • Publication number: 20190161299
    Abstract: A sheet conveying device includable in an image forming apparatus that uses a method of conveying a conveyance target medium and a method of forming an image, includes a position detector, a position adjuster, and circuitry. The position detector is configured to detect a position of a conveyance target medium. Based on a detection of the position of the conveyance target medium by the position detector, the position adjuster moves in at least one of a width direction of the conveyance target medium and a rotation direction of the conveyance target medium within a plane of conveyance of the conveyance target medium and repeatedly adjusts the position of the conveyance target medium while conveying the conveyance target medium. The circuitry changes a conveying speed of the conveyance target medium, according to a change of the position of the conveyance target medium after adjusted by the position adjuster.
    Type: Application
    Filed: November 29, 2018
    Publication date: May 30, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Tomohiro EGAWA, Yuichiro MAEYAMA, Motoharu TAKAHASHI
  • Publication number: 20190161301
    Abstract: A sheet conveying device, which is included in an image forming apparatus, includes a plurality of position detectors, a leading end detector, and a position adjuster. The plurality of position detectors is configured to detect a position of a sheet. The leading end detector is configured to detect a leading end of the sheet. The position adjuster is configured to, based on a detection result obtained by the plurality of position detectors, rotate in a rotation direction of the sheet within a plane of conveyance of the sheet to change the position of the sheet the position adjuster grips the sheet under conveyance to cause the leading end detector to rotate with the position adjuster in the rotation direction of the sheet within the plane of conveyance of the sheet.
    Type: Application
    Filed: November 30, 2018
    Publication date: May 30, 2019
    Applicant: Ricoh Company, Ltd.
    Inventors: Yuichiro MAEYAMA, Tomohiro EGAWA, Motoharu TAKAHASHI
  • Patent number: 8094391
    Abstract: A driving device includes: a bending displacement member (1A), partially fixed, which is excited by electrical control to be bent and displaced; a bending displacement member (1B), partially fixed, which is excited by electrical control to be bent and displaced; an elastic member (2) joined to the bending displacement members (1A, 1B); a friction member (3), joined to the elastic member (2), which is capable of partially making contact with a body tube (4); and a camera module housing (6) capable of housing the bending displacement members (1A, 1B), the elastic member (2), and the body tube (4). The bending displacement members (1A, 1B) may be disposed along an inner wall of the camera module housing (6). The driving device may also include control means for exciting the bending displacement members (1A, 1B).
    Type: Grant
    Filed: February 6, 2008
    Date of Patent: January 10, 2012
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tsuneo Fujiwara, Kyoji Kasuga, Tomohiro Egawa
  • Patent number: 7813063
    Abstract: The present invention relates to a driving unit capable of implementing a long stroke drive while achieving height reduction of the driving unit. The driving unit is provided with a driving mechanism for driving a driven body. The driving mechanism includes: a bendable displaceable member that is fixated at one end and, through electric control, bent and displaced at the other end; a driving direction-changing member changing a direction of the bending and displacement of the bendable displaceable member to a driving direction of the driven body, the driving direction of the driven body being perpendicular to the direction of the bendable displaceable member; a contact member frictionally engaged with the driving direction-changing member and driving the driven body; and a precompression member mounted in the driven body and precompressing the contact member towards the driving direction-changing member.
    Type: Grant
    Filed: July 16, 2009
    Date of Patent: October 12, 2010
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Tomohiro Egawa
  • Publication number: 20100149665
    Abstract: In order to achieve a low-profile driving device, the driving device includes: a bending displacement member (1A), partially fixed, which is excited by electrical control to be bent and displaced; a bending displacement member (1B), partially fixed, which is excited by electrical control to be bent and displaced; an elastic member (2) joined to the bending displacement members (1A, 1B); a friction member (3), joined to the elastic member (2), which is capable of partially making contact with a body tube (4); and a camera module housing (6) capable of housing the bending displacement members (1A, 1B), the elastic member (2), and the body tube (4). The bending displacement members (1A, 1B) are disposed along an inner wall of the camera module housing (6).
    Type: Application
    Filed: February 6, 2008
    Publication date: June 17, 2010
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Tsuneo Fujiwara, Kyoji Kasuga, Tomohiro Egawa
  • Publication number: 20100027140
    Abstract: The present invention relates to a driving unit capable of implementing a long stroke drive while achieving height reduction of the driving unit. The driving unit is provided with a driving mechanism for driving a driven body. The driving mechanism includes: a bendable displaceable member that is fixated at one end and, through electric control, bent and displaced at the other end; a driving direction-changing member changing a direction of the bending and displacement of the bendable displaceable member to a driving direction of the driven body, the driving direction of the driven body being perpendicular to the direction of the bendable displaceable member; a contact member frictionally engaged with the driving direction-changing member and driving the driven body; and a precompression member mounted in the driven body and precompressing the contact member towards the driving direction-changing member.
    Type: Application
    Filed: July 16, 2009
    Publication date: February 4, 2010
    Applicant: Sharp Kabushiki Kaisha
    Inventor: Tomohiro EGAWA
  • Publication number: 20080278034
    Abstract: In order to provide a driving device that can be made more compact and shorter in height, a driving mechanism of a driving device according to the present invention includes: a flex movement member 1 that exhibits flex movement when excited by electronic control, and a first fixing member 14 for fixing a part of the flex movement member 1, both ends of which sandwich the part fixed by the fixing member 14 and bend. A first elastic member 12 and a second elastic member 22 are connected to the both ends of the flex movement member 1. The flex movement of the both ends of the flex movement member 1 causes distortion or bending in the first elastic member 12 and the second elastic member 22, so that a first frictional member 12 and a second frictional member 23 each serving as a contact section in contact with a lens barrel 5 move in a direction different from the flex movement direction of the both ends of the flex movement member 1. Thus, the lens barrel 5 is driven.
    Type: Application
    Filed: May 6, 2008
    Publication date: November 13, 2008
    Applicant: Sharp Kabushiki Kaisha
    Inventor: Tomohiro Egawa