Patents by Inventor Yuji Kogure

Yuji Kogure 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).

  • Patent number: 9715082
    Abstract: A lens barrel includes a lens drive ring which moves a movable lens group along an optical axis, a first inputter including an actuator and generating a first rotational input, a second inputter which generates a second rotational input, a power transmission clutch including a first input member, a second input member and an output member, wherein the first input member is rotatable and is associated with the first inputter, the second input member is rotatable and is associated with the second inputter, and the output member is rotatable and is associated with the lens drive ring; and a load controller. When the second rotational input, which is generated by the second inputter, is applied to the second input member to thereby cause the first input member to rotate, the load controller exerts a rotational load on the actuator.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: July 25, 2017
    Assignee: RICOH IMAGING COMPANY, LTD.
    Inventors: Yuji Kogure, Masahiko Kawamura
  • Patent number: 9310669
    Abstract: A camera body includes a plurality of body-side bayonet lugs which are provided on the peripheral edge of an opening; and a protrusion which is positioned in a circular-arc opening formed between adjacent body-side bayonet lugs of the body-side bayonet lugs, the distance between the protrusion and either of adjacent two body-side bayonet lugs of the body-side bayonet lugs being shorter than each of the lens-side bayonet lugs; and a body-side mount surface with which the lens-side bayonet surface comes into contact from the front side when the lens-side bayonet lugs are positioned immediately behind the body-side bayonet lugs.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: April 12, 2016
    Assignee: RICOH IMAGING COMPANY, LTD.
    Inventors: Makoto Iikawa, Makoto Niwa, Yuji Kogure, Takahiro Kobayashi, Masahiro Inazuka, Ichiro Taguchi, Kosei Kosako
  • Publication number: 20160054540
    Abstract: A lens barrel includes a lens drive ring which moves a movable lens group along an optical axis, a first inputter including an actuator and generating a first rotational input, a second inputter which generates a second rotational input, a power transmission clutch including a first input member, a second input member and an output member, wherein the first input member is rotatable and is associated with the first inputter, the second input member is rotatable and is associated with the second inputter, and the output member is rotatable and is associated with the lens drive ring; and a load controller. When the second rotational input, which is generated by the second inputter, is applied to the second input member to thereby cause the first input member to rotate, the load controller exerts a rotational load on the actuator.
    Type: Application
    Filed: August 11, 2015
    Publication date: February 25, 2016
    Applicant: RICOH IMAGING COMPANY, LTD.
    Inventors: Yuji KOGURE, Masahiko KAWAMURA
  • Patent number: 9197801
    Abstract: A camera body includes a body-side bayonet lug, wherein a lens-side bayonet lug of a lens barrel is positioned immediately behind the body-side bayonet lug when the lens barrel is mounted to the camera body; an opposed surface formed on the rear surface of the body-side bayonet lug and positioned immediately in front of the lens-side bayonet lug; a body-side mount surface positioned in front of the opposed surface and with which the lens-side bayonet surface comes into contact; and a body-side contact portion, the front end of which contacts the rear end of the lens-side contact portion when the opposed surface faces the lens-side bayonet lug, the front end of the body-side contact portion being positioned in front of the opposed surface and behind the body-side mount surface.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: November 24, 2015
    Assignee: RICOH IMAGING COMPANY, LTD.
    Inventors: Makoto Iikawa, Makoto Niwa, Yuji Kogure, Takahiro Kobayashi, Masahiro Inazuka, Ichiro Taguchi, Kosei Kosako
  • Patent number: 9134590
    Abstract: A camera body includes body-side bayonet lugs concentric with lens-side bayonet lugs, circular-arc openings, a circular arc protrusion positioned inside the camera body and projecting forward and concentric with the body-side bayonet lugs, body-side contact portions provided and arranged on the front end surface of the circular arc protrusion and come into contact with lens-side contact portions which are provided on the lens barrel, and rearward biasers provided immediately behind two of the body-side bayonet lugs to bias and move the lens-side bayonet lugs rearward, wherein two of the body-side contact portions located at both ends in the lengthwise direction and the two rearward biasers lie on radial-direction extension lines of the circular arc protrusion, respectively, as viewed in an optical axis direction.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: September 15, 2015
    Assignee: RICOH IMAGING COMPANY, LTD.
    Inventors: Makoto Iikawa, Makoto Niwa, Yuji Kogure, Takahiro Kobayashi, Masahiro Inazuka, Ichiro Taguchi, Kosei Kosako
  • Publication number: 20140119720
    Abstract: A camera body includes body-side bayonet lugs concentric with lens-side bayonet lugs, circular-arc openings, a circular arc protrusion positioned inside the camera body and projecting forward and concentric with the body-side bayonet lugs, body-side contact portions provided and arranged on the front end surface of the circular arc protrusion and come into contact with lens-side contact portions which are provided on the lens barrel, and rearward biasers provided immediately behind two of the body-side bayonet lugs to bias and move the lens-side bayonet lugs rearward, wherein two of the body-side contact portions located at both ends in the lengthwise direction and the two rearward biasers lie on radial-direction extension lines of the circular arc protrusion, respectively, as viewed in an optical axis direction.
    Type: Application
    Filed: June 8, 2012
    Publication date: May 1, 2014
    Applicant: RICOH IMAGING COMPANY, LTD.
    Inventors: Makoto Iikawa, Makoto Niwa, Yuji Kogure, Takahiro Kobayashi, Masahiro Inazuka, Ichiro Taguchi, Kosei Kosako
  • Publication number: 20140119721
    Abstract: A camera body includes a plurality of body-side bayonet lugs which are provided on the peripheral edge of an opening; and a protrusion which is positioned in a circular-arc opening formed between adjacent body-side bayonet lugs of the body-side bayonet lugs, the distance between the protrusion and either of adjacent two body-side bayonet lugs of the body-side bayonet lugs being shorter than each of the lens-side bayonet lugs; and a body-side mount surface with which the lens-side bayonet surface comes into contact from the front side when the lens-side bayonet lugs are positioned immediately behind the body-side bayonet lugs.
    Type: Application
    Filed: June 8, 2012
    Publication date: May 1, 2014
    Applicant: RICOH IMAGING COMPANY, LTD.
    Inventors: Makoto Iikawa, Makoto Niwa, Yuji Kogure, Takahiro Kobayashi, Masahiro Inazuka, Ichiro Taguchi, Kosei Kosako
  • Publication number: 20140111686
    Abstract: A camera body includes a body-side bayonet lug, wherein a lens-side bayonet lug of a lens barrel is positioned immediately behind the body-side bayonet lug when the lens barrel is mounted to the camera body; an opposed surface formed on the rear surface of the body-side bayonet and positioned immediately in front of the lens-side bayonet lug; a body-side mount surface positioned in front of the opposed surface and with which the lens-side bayonet surface comes into contact; and a body-side contact portion, the front end of which contacts the rear end of the lens-side contact portion when the opposed surface faces the lens-side bayonet lug, the front end of the body-side contact portion being positioned in front of the opposed surface and behind the body-side mount surface.
    Type: Application
    Filed: June 8, 2012
    Publication date: April 24, 2014
    Applicant: RICOH IMAGING COMPANY, LTD.
    Inventors: Makoto Iikawa, Makoto Niwa, Yuji Kogure, Takahiro Kobayashi, Masahiro Inazuka, Ichiro Taguchi, Kosei Kosako
  • Patent number: 8508873
    Abstract: A water-resistant structure of a lens barrel includes a sealing member that seals an annular gap between inner and outer annular members, wherein the sealing member is positioned in a vicinity of an open end of the outer annular member and is fixed to one of the inner and outer annular members to be slidable on the other of the inner and outer annular members, and a drain groove formed on the inner annular member and positioned alongside the sealing member at a position closer to the open end of the outer annular member than the sealing member. Furthermore, a frictional resistance of a first sealing member produced between a secondary annular member and a manually-rotatable annular members is greater than a frictional resistance of the second sealing member that urges one of two of the manually-rotatable annular members to follow a rotation of the other thereof when rotated.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: August 13, 2013
    Assignee: Pentax Ricoh Imaging Company, Ltd.
    Inventors: Makoto Iikawa, Yuji Kogure, Yuzo Minowa, Toshiyuki Irie
  • Patent number: 7802931
    Abstract: A lens accessory mounting device for mounting a lens accessory to a front end of a lens barrel, an outer diameter of the lens accessory being substantially the same as an outer diameter of the front end of the lens barrel, the lens accessory mounting device includes at least one inward bayonet lug which projects radially inwards from an inner peripheral surface of a front end of the lens barrel; and at least one outward bayonet lug which projects radially outwards from the lens accessory to be engageable with the two inward bayonet lugs, respectively. The outward bayonet lug is firstly inserted into the front end of the lens barrel and subsequently brought into engagement with the inward bayonet lug, respectively, when the lens accessory is mounted to the lens barrel.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: September 28, 2010
    Assignee: Hoya Corporation
    Inventors: Yuji Kogure, Hiroaki Suzuki
  • Publication number: 20100214679
    Abstract: A water-resistant structure of a lens barrel includes a sealing member that seals an annular gap between inner and outer annular members, wherein the sealing member is positioned in a vicinity of an open end of the outer annular member and is fixed to one of the inner and outer annular members to be slidable on the other of the inner and outer annular members, and a drain groove formed on the inner annular member and positioned alongside the sealing member at a position closer to the open end of the outer annular member than the sealing member. Furthermore, a frictional resistance of a first sealing member produced between a secondary annular member and a manually-rotatable annular members is greater than a frictional resistance of the second sealing member that urges one of two of the manually-rotatable annular members to follow a rotation of the other thereof when rotated.
    Type: Application
    Filed: February 23, 2010
    Publication date: August 26, 2010
    Applicant: HOYA CORPORATION
    Inventors: Makoto IIKAWA, Yuji KOGURE, Yuzo MINOWA, Toshiyuki IRIE
  • Patent number: 7782557
    Abstract: A lens position adjusting device of a lens barrel includes a stationary ring, and a manual rotating ring which is screw-engaged with the stationary ring to be manually rotatable about an optical axis to move a movable lens group in the optical axis direction, wherein the manual rotating ring includes an operating ring member; and a sub-ring member which is screwed into the stationary ring, wherein the operating ring member and the sub-ring member are coupled to each other so that a relative rotation position therebetween about the optical axis is adjustable.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: August 24, 2010
    Assignee: Hoya Corporation
    Inventors: Yuji Kogure, Toshiyuki Irie
  • Patent number: 7738782
    Abstract: A lens position detector for detecting a position of a movable lens group in an optical axis direction includes a manual operating ring, a rotation of the manual operating ring causing the movable lens group to move in the optical axis direction; a code plate installed in a barrel; and a conductive brush fixed to the manual operating ring, the rotation of the manual operating ring causing relative rotational sliding between the conductive brush and the code plate. A surface of the code plate with which the conductive brush is in sliding contact is inclined to a plane orthogonal to the optical axis at an angle of inclination substantially equal to a lead angle of male and female screw threads engaged with each other which are formed on the manual operating ring and the ring member, respectively.
    Type: Grant
    Filed: June 21, 2007
    Date of Patent: June 15, 2010
    Assignee: Hoya Corporation
    Inventor: Yuji Kogure
  • Patent number: 7373082
    Abstract: A light shielding structure of a zoom lens barrel includes an outer ring, an intermediate ring and an inner ring which are concentrically arranged, the intermediate ring being movable relative to the outer ring and including at least one through-slot, the inner ring being movable relative to the intermediate ring, and the inner ring including at least one projection which is formed on an outer peripheral surface of the inner ring to be engaged in the through-slot. The light shielding structure is in the form of a light shielding sheet including a fixing portion which is fixed to the inner ring, and at least one resilient light-shielding tongue which projects radially outwards from the fixing portion to pass through the through-slot so that a radially outer end portion of the resilient light-shielding tongue comes in contact with an inner peripheral surface of the outer ring.
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: May 13, 2008
    Assignee: PENTAX Corporation
    Inventors: Yoshihiro Yamazaki, Yuji Kogure
  • Patent number: 7356251
    Abstract: An assembly-stage focus adjustment mechanism of a zoom lens barrel including a plurality of lens groups which are moved while distances therebetween are changed to perform a zooming operation, the assembly-stage focus adjustment mechanism including two lens fixing frames to which two of the plurality of lens groups are fixed, respectively; two moving frames which linearly move in an optical axis direction during the zooming operation, the two moving frames being respectively screw-engaged with the two lens fixing frames; and a rotational-direction integrating device which makes the two lens fixing frames rotate as one integral body in a direction of rotation relative to the two moving frames when an assembly-stage focus adjustment operation is performed.
    Type: Grant
    Filed: August 8, 2005
    Date of Patent: April 8, 2008
    Assignee: PENTAX Corporation
    Inventors: Yoshihiro Yamazaki, Yuji Kogure, Kazunori Ishizuka, Toshiharu Suzuki
  • Publication number: 20070297790
    Abstract: A lens accessory mounting device for mounting a lens accessory to a front end of a lens barrel, an outer diameter of the lens accessory being substantially the same as an outer diameter of the front end of the lens barrel, the lens accessory mounting device includes at least one inward bayonet lug which projects radially inwards from an inner peripheral surface of a front end of the lens barrel; and at least one outward bayonet lug which projects radially outwards from the lens accessory to be engageable with the two inward bayonet lugs, respectively. The outward bayonet lug is firstly inserted into the front end of the lens barrel and subsequently brought into engagement with the inward bayonet lug, respectively, when the lens accessory is mounted to the lens barrel.
    Type: Application
    Filed: June 21, 2007
    Publication date: December 27, 2007
    Applicant: PENTAX CORPORATION
    Inventors: Yuji KOGURE, Hiroaki SUZUKI
  • Publication number: 20070297783
    Abstract: A lens position detector for detecting a position of a movable lens group in an optical axis direction includes a manual operating ring, a rotation of the manual operating ring causing the movable lens group to move in the optical axis direction; a code plate installed in a barrel; and a conductive brush fixed to the manual operating ring, the rotation of the manual operating ring causing relative rotational sliding between the conductive brush and the code plate. A surface of the code plate with which the conductive brush is in sliding contact is inclined to a plane orthogonal to the optical axis at an angle of inclination substantially equal to a lead angle of male and female screw threads engaged with each other which are formed on the manual operating ring and the ring member, respectively.
    Type: Application
    Filed: June 21, 2007
    Publication date: December 27, 2007
    Applicant: PENTAX CORPORATION
    Inventor: Yuji KOGURE
  • Publication number: 20070297785
    Abstract: A lens position adjusting device of a lens barrel includes a stationary ring, and a manual rotating ring which is screw-engaged with the stationary ring to be manually rotatable about an optical axis to move a movable lens group in the optical axis direction, wherein the manual rotating ring includes an operating ring member; and a sub-ring member which is screwed into the stationary ring, wherein the operating ring member and the sub-ring member are coupled to each other so that a relative rotation position therebetween about the optical axis is adjustable.
    Type: Application
    Filed: June 21, 2007
    Publication date: December 27, 2007
    Applicant: PENTAX CORPORATION
    Inventors: Yuji Kogure, Toshiyuki Irie
  • Publication number: 20060034596
    Abstract: An assembly-stage focus adjustment mechanism of a zoom lens barrel including a plurality of lens groups which are moved while distances therebetween are changed to perform a zooming operation, the assembly-stage focus adjustment mechanism including two lens fixing frames to which two of the plurality of lens groups are fixed, respectively; two moving frames which linearly move in an optical axis direction during the zooming operation, the two moving frames being respectively screw-engaged with the two lens fixing frames; and a rotational-direction integrating device which makes the two lens fixing frames rotate as one integral body in a direction of rotation relative to the two moving frames when an assembly-stage focus adjustment operation is performed.
    Type: Application
    Filed: August 8, 2005
    Publication date: February 16, 2006
    Applicant: PENTAX Corporation
    Inventors: Yoshihiro Yamazaki, Yuji Kogure, Kazunori Ishizuka, Toshiharu Suzuki
  • Publication number: 20060034595
    Abstract: A light shielding structure of a zoom lens barrel includes an outer ring, an intermediate ring and an inner ring which are concentrically arranged, the intermediate ring being movable relative to the outer ring and including at least one through-slot, the inner ring being movable relative to the intermediate ring, and the inner ring including at least one projection which is formed on an outer peripheral surface of the inner ring to be engaged in the through-slot. The light shielding structure is in the form of a light shielding sheet including a fixing portion which is fixed to the inner ring, and at least one resilient light-shielding tongue which projects radially outwards from the fixing portion to pass through the through-slot so that a radially outer end portion of the resilient light-shielding tongue comes in contact with an inner peripheral surface of the outer ring.
    Type: Application
    Filed: August 8, 2005
    Publication date: February 16, 2006
    Applicant: PENTAX Corporation
    Inventors: Yoshihiro Yamazaki, Yuji Kogure