Patents by Inventor Masateru Asayama
Masateru Asayama 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: 10948684Abstract: An interchangeable lens that is removably attachable to a camera body includes: a lens-side mount; a cylindrical portion; a lens-side terminal group; a first lens-side projecting portion disposed at an outer periphery side of the lens-side terminal group, the first lens-side projecting portion projecting outwardly from the cylindrical portion and extending in a circumferential direction of the cylindrical portion; a third lens-side projecting portion at least partly disposed at a position facing the first lens-side projecting portion across the optical axis, the third lens-side projecting portion projecting outwardly from the cylindrical portion and extending in the circumferential direction; and a cutout provided on the third lens-side projecting portion in the circumferential direction.Type: GrantFiled: June 18, 2019Date of Patent: March 16, 2021Assignee: NIKON CORPORATIONInventors: Koji Nagaoka, Masateru Asayama, Satoshi Kazahaya
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Patent number: 10739553Abstract: A lens barrel, in one configuration, includes a moving member that has a cam pin and moves in an optical axis direction of a lens while holding the lens; a first barrel; a second barrel; a recess groove that is formed along a circumferential direction around the optical axis in one of a surface, which faces the first barrel, of the second barrel and a surface, which faces the second barrel, of the first barrel; and a biasing portion that faces the recess groove and applies a biasing force in a direction intersecting with the optical axis. The biasing force applied by the biasing portion changes according to a relative rotation between the first barrel and the second barrel.Type: GrantFiled: April 6, 2018Date of Patent: August 11, 2020Assignee: NIKON CORPORATIONInventor: Masateru Asayama
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Publication number: 20200026023Abstract: An interchangeable lens that is removably attachable to a camera body includes: a lens-side mount; a cylindrical portion; a lens-side terminal group; a first lens-side projecting portion disposed at an outer periphery side of the lens-side terminal group, the first lens-side projecting portion projecting outwardly from the cylindrical portion and extending in a circumferential direction of the cylindrical portion; a third lens-side projecting portion at least partly disposed at a position facing the first lens-side projecting portion across the optical axis, the third lens-side projecting portion projecting outwardly from the cylindrical portion and extending in the circumferential direction; and a cutout provided on the third lens-side projecting portion in the circumferential direction.Type: ApplicationFiled: June 18, 2019Publication date: January 23, 2020Applicant: NIKON CORPORATIONInventors: Koji NAGAOKA, Masateru ASAYAMA, Satoshi KAZAHAYA
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Publication number: 20180224627Abstract: A lens barrel, in one configuration, includes a moving member that has a cam pin and moves in an optical axis direction of a lens while holding the lens; a first barrel; a second barrel; a recess groove that is formed along a circumferential direction around the optical axis in one of a surface, which faces the first barrel, of the second barrel and a surface, which faces the second barrel, of the first barrel; and a biasing portion that faces the recess groove and applies a biasing force in a direction intersecting with the optical axis. The biasing force applied by the biasing portion changes according to a relative rotation between the first barrel and the second barrel.Type: ApplicationFiled: April 6, 2018Publication date: August 9, 2018Applicant: NIKON CORPORATIONInventor: Masateru ASAYAMA
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Patent number: 9958635Abstract: A lens barrel, in one configuration, includes: a first barrel in which a cam groove having a shape curved with respect to a predetermined axis direction is formed to pierce through the first barrel; a second barrel capable of rotating around the predetermined axis along an outer circumferential surface of the first barrel, a straight groove extending in the predetermined axis direction being formed in the second barrel; a moving member that has a cam pin moving along the cam groove and the straight groove and moves in the predetermined axis direction while holding a lens inside the first barrel as the second barrel rotates with respect to the first barrel; and a damping mechanism that applies damping force depending on an angle of the cam groove to the predetermined axis direction to the second barrel.Type: GrantFiled: January 8, 2016Date of Patent: May 1, 2018Assignee: NIKON CORPORATIONInventor: Masateru Asayama
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Publication number: 20160124179Abstract: A lens barrel, in one configuration, includes: a first barrel in which a cam groove having a shape curved with respect to a predetermined axis direction is formed to pierce through the first barrel; a second barrel capable of rotating around the predetermined axis along an outer circumferential surface of the first barrel, a straight groove extending in the predetermined axis direction being formed in the second barrel; a moving member that has a cam pin moving along the cam groove and the straight groove and moves in the predetermined axis direction while holding a lens inside the first barrel as the second barrel rotates with respect to the first barrel; and a damping mechanism that applies damping force depending on an angle of the cam groove to the predetermined axis direction to the second barrel.Type: ApplicationFiled: January 8, 2016Publication date: May 5, 2016Applicant: NIKON CORPORATIONInventor: Masateru Asayama
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Patent number: 9268109Abstract: Provided is a lens barrel capable of providing good operational feeling, the lens barrel including: a first barrel in which a cam groove having a shape curved with respect to a predetermined axis direction is formed to pierce through the first barrel; a second barrel capable of rotating around the predetermined axis along an outer circumferential surface of the first barrel, a straight groove extending in the predetermined axis direction being formed in the second barrel; a moving member that has a cam pin moving along the cam groove and the straight groove and moves in the predetermined axis direction while holding a lens inside the first barrel as the second barrel rotates with respect to the first barrel; and a damping mechanism that applies damping force depending on an angle of the cam groove to the predetermined axis direction to the second barrel.Type: GrantFiled: March 12, 2012Date of Patent: February 23, 2016Assignee: NIKON CORPORATIONInventor: Masateru Asayama
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Publication number: 20140092486Abstract: Provided is a lens barrel capable of providing good operational feeling, the lens barrel including: a first barrel in which a cam groove having a shape curved with respect to a predetermined axis direction is formed to pierce through the first barrel; a second barrel capable of rotating around the predetermined axis along an outer circumferential surface of the first barrel, a straight groove extending in the predetermined axis direction being formed in the second barrel; a moving member that has a cam pin moving along the cam groove and the straight groove and moves in the predetermined axis direction while holding a lens inside the first barrel as the second barrel rotates with respect to the first barrel; and a damping mechanism that applies damping force depending on an angle of the cam groove to the predetermined axis direction to the second barrel.Type: ApplicationFiled: March 12, 2012Publication date: April 3, 2014Applicant: NIKON CORPORATIONInventor: Masateru Asayama
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Patent number: 6554503Abstract: A bayonet mount includes a mount main body constituted of resin and a metal member that, at least partially, reinforces a bayonet tab portion at the mount main body.Type: GrantFiled: August 2, 2001Date of Patent: April 29, 2003Assignee: Nikon, CorporationInventors: Hitoshi Imanari, Masateru Asayama, Hidefumi Iinuma, Satoshi Hara
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Publication number: 20010053289Abstract: A bayonet mount includes a mount main body constituted of resin and a metal member that, at least partially, reinforces a bayonet tab portion at the mount main body.Type: ApplicationFiled: August 2, 2001Publication date: December 20, 2001Applicant: Nikon CorporationInventors: Hitoshi Imanari, Masateru Asayama, Hidefumi Iinuma, Satoshi Hara
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Patent number: 6094538Abstract: A lens barrel capable of selecting an autofocus mode and a manual focus mode includes a fixed drum, a focusing lens movable in an optical axis direction, a driving motor, constructed of a rotor and a stator, for moving the focusing lens, the rotor rotating with respect to the stator when in an autofocus mode, the rotor and the stator rotating together as a whole with respect to the fixed drum when in the manual focus mode, a focusing lens moving mechanism for converting a rotational motion of the rotor into a motion in an optical axis direction and transmitting the optical-axis-directional motion to the focusing lens, and a subassembly constructed of a manual focus ring, a connection member for connecting the stator to the manual focus ring, and an elastic member, provided between the manual focus ring and the connection member, for making the manual focus ring and the connection member frictionally engaged with each other.Type: GrantFiled: May 18, 1999Date of Patent: July 25, 2000Assignee: Nikon CorporationInventors: Masateru Asayama, Tsuneo Watanabe