Patents by Inventor Tomokazu Kihara
Tomokazu Kihara 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: 8118503Abstract: A base plate is elongate and an opening for a photographing optical path is configured close to one end in its longitudinal direction. A shutter blade is rotatably mounted to the blade-mounting shank of the base plate so that when the opening is fully opened, a part covering the opening is stored in the region of the base plate in the longitudinal direction. Another shutter blade is slidably mounted to the blade-mounting shank of the base plate so that when the opening is fully opened, a part covering the opening is stored in the region of the base plate in its lateral direction. Each of the shutter blades is constructed so that the reciprocating operation is performed by the driving pin of an electromagnetic actuator to open and to close the opening.Type: GrantFiled: June 26, 2008Date of Patent: February 21, 2012Assignee: Nidec Copal CorporationInventors: Tomokazu Kihara, Nobuaki Watanabe
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Patent number: 7922403Abstract: A blade driving apparatus for cameras includes a base plate having an aperture section for a photographing optical path; a partition plate having an aperture section for the photographing optical path so that a blade chamber is interposed between the base plate and the partition plate; a cover frame having an actuator chamber between the partition plate and the cover frame; a permanent magnet rotor rotatably mounted on the cover frame so that an output pin is introduced into the blade chamber; a yoke in which tops of two legs constructed as magnetic pole sections are opposite to the peripheral surface of the rotor in the actuator chamber and one of the two legs is fitted into a bobbin around which a coil is wound; and at least one blade rotatably mounted to a shank for at least one blade which is set upright on the cover frame and is introduced into the blade chamber, and introduced into, and removed from, the exposure aperture by the output pin.Type: GrantFiled: February 26, 2007Date of Patent: April 12, 2011Assignee: Nidec Copal CorporationInventor: Tomokazu Kihara
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Publication number: 20100202770Abstract: A base plate is elongate and an opening for a photographing optical path is configured close to one end in its longitudinal direction. A shutter blade is rotatably mounted to the blade-mounting shank of the base plate so that when the opening is fully opened, a part covering the opening is stored in the region of the base plate in the longitudinal direction. Another shutter blade is slidably mounted to the blade-mounting shank of the base plate so that when the opening is fully opened, a part covering the opening is stored in the region of the base plate in its lateral direction. Each of the shutter blades is constructed so that the reciprocating operation is performed by the driving pin of an electromagnetic actuator to open and to close the opening.Type: ApplicationFiled: June 26, 2008Publication date: August 12, 2010Inventors: Tomokazu Kihara, Nobuaki Watanabe
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Patent number: 7410310Abstract: A blade driving apparatus for cameras includes a base plate having an aperture for a photographing optical path; a cover plate having the aperture for the photographing optical path, provided with a blade chamber between the base plate and the cover plate; at least one blade rotatably mounted to the base plate in the blade chamber; and at least one electromagnetic driving source driving the blade. The electromagnetic driving source includes a rotor magnetized to have a plurality of magnetic poles at preset angles on its peripheral surface and having a driving pin for driving pin for driving the blade by its rotation, a yoke having a plurality of magnetic pole sections opposite to the peripheral surface of the rotor, and a coil wound through the yoke. At least, the rotor and the yoke are interposed between the base plate and the cover plate so that, at least, the rotor is rotatably mounted to the base plate.Type: GrantFiled: June 29, 2005Date of Patent: August 12, 2008Assignee: Nidec Copal CorporationInventor: Tomokazu Kihara
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Publication number: 20070201866Abstract: A blade driving apparatus for cameras includes a base plate having an aperture section for a photographing optical path; a partition plate having an aperture section for the photographing optical path so that a blade chamber is interposed between the base plate and the partition plate; a cover frame having an actuator chamber between the partition plate and the cover frame; a permanent magnet rotor rotatably mounted on the cover frame so that an output pin is introduced into the blade chamber; a yoke in which tops of two legs constructed as magnetic pole sections are opposite to the peripheral surface of the rotor in the actuator chamber and one of the two legs is fitted into a bobbin around which a coil is wound; and at least one blade rotatably mounted to a shank for at least one blade which is set upright on the cover frame and is introduced into the blade chamber, and introduced into, and removed from, the exposure aperture by the output pin.Type: ApplicationFiled: February 26, 2007Publication date: August 30, 2007Inventor: Tomokazu Kihara
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Publication number: 20050286889Abstract: A blade driving apparatus for cameras includes a base plate having an aperture for a photographing optical path; a cover plate having the aperture for the photographing optical path, provided with a blade chamber between the base plate and the cover plate; at least one blade rotatably mounted to the base plate in the blade chamber; and at least one electromagnetic driving source driving the blade. The electromagnetic driving source includes a rotor magnetized to have a plurality of magnetic poles at preset angles on its peripheral surface and having a driving pin for driving pin for driving the blade by its rotation, a yoke having a plurality of magnetic pole sections opposite to the peripheral surface of the rotor, and a coil wound through the yoke. At least, the rotor and the yoke are interposed between the base plate and the cover plate so that, at least, the rotor is rotatably mounted to the base plate.Type: ApplicationFiled: June 29, 2005Publication date: December 29, 2005Inventor: Tomokazu Kihara
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Patent number: 6585429Abstract: The camera shutter unit of the present invention is provided with a diaphragm blade arranged to be capable of moving between a stopping-down position wherein an aperture is stopped down, and an evacuating position wherein the aperture is opened. A shutter blade is arranged to be capable of moving between an opening position, wherein the aperture is opened, and a closing position, wherein the aperture is closed. A drive-control mechanism is provided for drive-controlling the shutter blade and the diaphragm blade. The drive-control mechanism has a single electromagnetic drive source, and a spring for restricting movement of the shutter blade toward the closing position when the diaphragm blade is positioned in the stopping-down position, and for releasing its restriction by a predetermined or more drive force generated by the electromagnetic drive source. Therefore, the unit can be of a small size and low in cost, and its reliability of function can be improved.Type: GrantFiled: May 15, 2001Date of Patent: July 1, 2003Assignee: Nidec Copal CorporationInventors: Daisuke Yaginuma, Nabuaki Watanabe, Tomokazu Kihara
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Patent number: 6547457Abstract: The camera shutter unit of the present invention comprises a diaphragm blade arranged to be capable of moving between a stopping-down position wherein an aperture is stopped down, and an evacuating position wherein the aperture is opened. A shutter blade is arranged to be capable of moving between an opening position, wherein the aperture is opened, and a closing position, wherein the aperture is closed. A dive-control mechanism is provided for drive-controlling the shutter blade and the diaphragm blade. The drive-control mechanism has a single electromagnetic drive source, a spring for restricting movement of the shutter blade toward the closing position when the diaphragm blade is positioned in the stopping-down position, and for releasing its restriction by a predetermined or more drive force generated by the electromagnetic drive source, and a control means for controlling the electromagnetic drive source.Type: GrantFiled: September 21, 2001Date of Patent: April 15, 2003Assignee: Nidec Copal CorporationInventors: Daisuke Yaginuma, Nobuaki Watanabe, Norihumi Ikeda, Tomokazu Kihara
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Publication number: 20020037169Abstract: The camera shutter unit of the present invention comprises a diaphragm blade arranged to be capable of moving between a stopping-down position wherein an aperture is stopped down, and an evacuating position wherein the aperture is opened. A shutter blade is arranged to be capable of moving between an opening position, wherein the aperture is opened, and a closing position, wherein the aperture is closed. A drive-control mechanism is provided for drive-controlling the shutter blade and the diaphragm blade. The drive-control mechanism has a single electromagnetic (drive source, a spring for restricting movement of the shutter blade toward the closing position when the diaphragm blade is positioned in the stopping-down position, and for releasing its restriction by a predetermined or more drive force generated by the electromagnetic drive source, and a control means for controlling the electromagnetic drive source.Type: ApplicationFiled: September 21, 2001Publication date: March 28, 2002Inventors: Daisuke Yaginuma, Nobuaki Watanabe, Norihumi Ikeda, Tomokazu Kihara
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Publication number: 20010041074Abstract: The camera shutter unit of the present invention is provided with a diaphragm blade arranged to be capable of moving between a stopping-down position wherein an aperture is stopped down and an evacuating position wherein the aperture is opened, a shutter blade arranged to be capable of moving between an opening position wherein the aperture is opened and a dosing position wherein the aperture is closed, and a drive-control mechanism for drive-controlling the shutter blade and the diaphragm blade. The drive-control mechanism has a single electromagnetic drive source, and a spring for restricting movement of the shutter blade toward the closing position when the diaphragm blade is positioned in the stopping-down position and for releasing its restriction by a predetermined or more drive force generated by the electromagnetic drive source. Therefore, the unit can become small size and low in cost, and its reliability of function can be improved.Type: ApplicationFiled: May 15, 2001Publication date: November 15, 2001Applicant: Nidec Copal CorporationInventors: Daisuke Yaginuma, Nabuaki Watanabe, Tomokazu Kihara