Patents by Inventor Hisashi Kawamoto
Hisashi Kawamoto 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: 7768726Abstract: A lens drive device capable of preventing a lens holder from inclining with respect to the optical axis direction of a lens is provided. A first gear (13), a second gear (14), a protrusion (20a), and a coil spring (6) are coaxially supported by a shaft (5), which is a fixed shaft. The rotational motion is transmitted to a two-stage gear (12) by rotating a rotor (11a) of a step motor (11) clockwise or counterclockwise. The rotational motion of the two-stage gear (12) is in turn transmitted to the first gear (13) and the second gear (14). When the first gear (13) and the second gear (14) rotate, the degree of engagement between an internally threaded portion (131a) of the first gear (13) and an externally threaded portion (141a) of the second gear (14) increases, and the second gear (14) moves upward. As the second gear (14) moves upward, a lens holder (20), urged upward by the elastic force of the coil spring (6), moves upward along the optical axis of a lens (21).Type: GrantFiled: April 4, 2007Date of Patent: August 3, 2010Assignee: Seiko Precision, Inc.Inventor: Hisashi Kawamoto
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Patent number: 7750528Abstract: An actuator includes: a coil for excitation; a rotor rotatably supported; a stator effecting a magnetic force on the rotor for rotation, the stator having first and second leg portions arranged side by side; and first and second coil frames each having a body portion and a pair of flange portions provided at an end of the body portion. The first coil frame is assembled onto the first leg portion. The second coil frame is assembled onto the second leg portion. The first and second coil frames are connected via a connecting portion bendable. The body portions are arranged not to be sandwiched between the first and second leg portions. Each of the body portions covers a halfway or less of each of peripheral surfaces of the first and second leg portions of the stator.Type: GrantFiled: April 14, 2009Date of Patent: July 6, 2010Assignee: Seiko Precision Inc.Inventor: Hisashi Kawamoto
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Publication number: 20100092166Abstract: A blade drive device includes a shutter unit. The shutter unit includes: a blade swingably supported; and a plurality of boards defining a blade chamber, each having an opening opened and closed by the blade. and an actuator serving as a drive force of the blade and including a rotor having a rotary shaft. The rotary shaft penetrates to the blade chamber. An elastic member is housed in the blade chamber, and urges the rotary shaft in a thrust direction.Type: ApplicationFiled: December 14, 2009Publication date: April 15, 2010Applicant: SEIKO PRECISION INC.Inventor: Hisashi KAWAMOTO
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Patent number: 7686725Abstract: A reduction gear includes a reduction mechanism, which includes: an external gear eccentrically rotatable about an input shaft; an internal gear internally meshing with the external gear and having a small number of difference between the teeth of the internal gear and the external gear; a disk for extracting only a rotational component of the external gear; an output shaft; and gears for transmitting the rotational component of the external gear from the disk to the output shaft. The disk, the gears and the output shaft are aligned in a direction perpendicular to an axial direction of the input shaft.Type: GrantFiled: August 8, 2008Date of Patent: March 30, 2010Assignee: Seiko Precision Inc.Inventor: Hisashi Kawamoto
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Publication number: 20100040357Abstract: A lens drive device includes: a lens holder holding a lens; a drive source including a rotor rotatably supported; a gear rotated by a rotation of the rotor; and a driven gear rotated by the gear. The lens holder is moved in an optical axis direction by a rotation of the driven gear. The driven gear includes a teeth portion. The teeth portion includes: a meshed portion meshing the gear; and a non-meshed portion abutting the gear to stop the rotations of the gear and the driven gear.Type: ApplicationFiled: October 1, 2009Publication date: February 18, 2010Applicant: SEIKO PRECISION INC.Inventor: Hisashi KAWAMOTO
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Patent number: 7658558Abstract: A shutter for an optical apparatus has multiple sectors and an operation member. Each of the multiple sectors has a cam opening for engagement and is pivotally provided to open and close a shutter opening, the operation member moves each of said multiple sectors in engagement with the cam opening, and the cam opening of at least one sector that is one of the multiple sectors is formed to change a moving direction of said at least one sector, when the operation member moves said at least one sector to a position to close the shutter opening.Type: GrantFiled: July 1, 2008Date of Patent: February 9, 2010Assignee: Seiko Precision, Inc.Inventors: Hisashi Kawamoto, Kazuya Shioda, Phichet Numnual
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Publication number: 20100021157Abstract: A vane driving device includes: a board having an opening; a blade changing an area of the opening, having a cam slot, and being elastically deformable; and a drive member transmitting a drive force from a drive source to the blade, and having a drive pin engaging the cam slot. The drive member is stopped by contacting the drive pin with at least one of end portions of the cam slot, when the blade is located in a fully opened state or in a small aperture state.Type: ApplicationFiled: September 30, 2009Publication date: January 28, 2010Applicant: SEIKO PRECISION INC.Inventors: Hisashi KAWAMOTO, Osamu TAKANO
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Publication number: 20100019585Abstract: A vane driving device includes: two boards each having an opening and defining a blade chamber therebetween; a blade changing an area of the opening and housed in the blade chamber; a drive source for driving the blade, the drive source including: a coil winded around a stator and exciting a stator; a rotor rotatably supported by a rotary shaft, rotatable in conjunction with the rotary shaft, and magnetized to have different polarities in a circumferential direction; and a rotor pinion meshing a driven member, and integrally formed in the rotary shaft; and a printed substrate electrically connected to the coil. The two boards define a drive source chamber housing the drive source therebetween. At least one of the two boards has an opening for escaping the coil outwardly from the drive source chamber. The printed substrate is arranged on a outer wall surface opposite to the drive source chamber.Type: ApplicationFiled: September 30, 2009Publication date: January 28, 2010Applicant: SEIKO PRECISION INC.Inventor: Hisashi KAWAMOTO
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Publication number: 20100011893Abstract: A gear mechanism includes a pair of gears including first and second gears overlapped with each other in an axial direction. The first and second gears include first and second tooth portions, respectively. The first tooth portion slightly projects outwardly from the second tooth portion. The first gear is formed with a deformation facilitating portion for facilitating deformation of the first gear in a radial direction.Type: ApplicationFiled: October 1, 2009Publication date: January 21, 2010Applicant: SEIKO PRECISION INC.Inventor: Hisashi KAWAMOTO
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Patent number: 7626775Abstract: A lens drive apparatus includes a lens holder holding a lens, a gear rotated by rotational force of a driving source, and a cam gear meshed with the gear. The lens holder is moved in an optical path direction by the cam gear. The lens holder has an engagement portion engaged with a cam portion of the cam gear and is arranged to move in response to a change in the cam portion in conjunction with the rotation of the cam gear. The cam gear has a teeth portion composed of plural teeth arranged in a circular shape. The teeth portion has an non-meshed portion not meshed with the gear and thicker than other teeth. The number of the pluses or the number of the rotation of the driving source is preset, whereby a position of the lens holder is recognized.Type: GrantFiled: October 17, 2008Date of Patent: December 1, 2009Assignee: Seiko Precision Inc.Inventor: Hisashi Kawamoto
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Publication number: 20090243196Abstract: A sheet feeding tray includes a frame member, and freely upwardly swingable plural bottom plates arranged on the frame member side by side perpendicular to a sheet feeding direction. The bottom plates cooperatively support a stack of envelope recording mediums. A lifting device having plural curvature sections is provided. The plural curvature sections are respectively arranged below the bottom plates to scuff and lift the lower surface of the plural bottom plates at a section downstream of the sheet feeding direction. The plural curvature sections each include a different outline in accordance with a difference of a decreasing amount of a thickness of the stack during sheet feeding. The different outlines enable the topmost surface of the stack to be almost horizontal.Type: ApplicationFiled: March 30, 2009Publication date: October 1, 2009Inventor: Hisashi Kawamoto
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Patent number: 7572075Abstract: There is provided a shutter apparatus including a substrate having a shutter opening and at lease two sectors that are supported by spindles swingably and that open and close the shutter opening, and a spindle of one sector of the at lease two sectors is located in a swinging range of another sector of the at lease two sectors, and is a pin of a rod-shaped member formed on the substrate to be lower in an overall height than a height in which the another sector swings.Type: GrantFiled: May 30, 2006Date of Patent: August 11, 2009Assignee: Seiko Precision Inc.Inventors: Hisashi Kawamoto, Kazuya Shioda
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Publication number: 20090195107Abstract: An actuator includes: a coil for excitation; a rotor rotatably supported; a stator effecting a magnetic force on the rotor for rotation, the stator having first and second leg portions arranged side by side; and first and second coil frames each having a body portion and a pair of flange portions provided at an end of the body portion. The first coil frame is assembled onto the first leg portion. The second coil frame is assembled onto the second leg portion. The first and second coil frames are connected via a connecting portion bendable. The body portions are arranged not to be sandwiched between the first and second leg portions. Each of the body portions covers a halfway or less of each of peripheral surfaces of the first and second leg portions of the stator.Type: ApplicationFiled: April 14, 2009Publication date: August 6, 2009Applicant: SEIKO PRECISION INC.Inventor: Hisashi Kawamoto
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Publication number: 20090174956Abstract: A lens drive device capable of preventing a lens holder from inclining with respect to the optical axis direction of a lens is provided. A first gear (13), a second gear (14), a protrusion (20a), and a coil spring (6) are coaxially supported by a shaft (5), which is a fixed shaft. The rotational motion is transmitted to a two-stage gear (12) by rotating a rotor (11a) of a step motor (11) clockwise or counterclockwise. The rotational motion of the two-stage gear (12) is in turn transmitted to the first gear (13) and the second gear (14). When the first gear (13) and the second gear (14) rotate, the degree of engagement between an internally threaded portion (131a) of the first gear (13) and an externally threaded portion (141a) of the second gear (14) increases, and the second gear (14) moves upward. As the second gear (14) moves upward, a lens holder (20), urged upward by the elastic force of the coil spring (6), moves upward along the optical axis of a lens (21).Type: ApplicationFiled: April 4, 2007Publication date: July 9, 2009Inventor: Hisashi Kawamoto
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Publication number: 20090168208Abstract: A lens drive apparatus includes: a base member; a holder having a cylindrical shape and movably supported in an optical axis direction relative to the base member; a cam member and moving the holder in the optical axis direction by abutting with the holder; and a biasing member urging the holder such that the holder 40 comes into contact with the cam member 50. The holder is formed such that a lens frame holding a lens is inserted and assembled into the holder from one side of the holder to another side of the holder. The cam member is disposed close to the one side with respect to the holder.Type: ApplicationFiled: March 6, 2009Publication date: July 2, 2009Applicant: SEIKO PRECISION INC.Inventors: Minoru Katsumata, Hisashi Kawamoto
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Publication number: 20090141161Abstract: An image pickup apparatus includes: an image pickup substrate on which an image pickup device is mounted on an object side; an optical unit having a lens for imaging an object light on the image pickup device; a blade member adjusting an amount of the object light entering into the lens; a drive unit having a motor driving the blade member; and a motor substrate supplying the motor with a drive power. The optical unit is provided in the image pickup substrate. The drive unit is provided in the optical unit so as to be spaced apart from the image pickup substrate. The motor substrate is provided in the drive unit so as to face the image pickup substrate. The conductive member electrically connecting the image pickup substrate with the motor substrate is disposed between the image pickup substrate and the motor substrate.Type: ApplicationFiled: February 6, 2009Publication date: June 4, 2009Applicant: SEIKO PRECISION INC.Inventor: Hisashi Kawamoto
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Publication number: 20090133518Abstract: A motion converter includes a reduction gear mechanism and a stationary cylindrical portion. The reduction gear mechanism includes an input shaft, an external gear eccentrically rotatable about the input shaft, an internal gear internally meshing with the external gear and having a small number of difference between teeth of the internal gear and those of the external gear, and an disc for extracting only a rotational component of the external gear. The stationary cylindrical portion surrounds a periphery of the extracting member. Screw portions are respectively formed at an outer periphery of the extracting member and at an inner periphery of the stationary cylindrical portion, and screw together and support the disc for movement in a direction of the input shaft in response to an amount of rotation of the disc.Type: ApplicationFiled: October 6, 2008Publication date: May 28, 2009Applicant: SEIKO PRECISION INC.Inventor: Hisashi KAWAMOTO
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Patent number: 7511391Abstract: An electromagnetic actuator has a rotor and a stator around which coils are wound to face portions of an outer surface of the rotor. The stator is C-shaped, the rotor is arranged so that a rotation axis thereof is existent in a space surrounded by the stator, and both ends of the stator are respectively formed within a range from 15 to 90 degrees from a virtual base line with respect to the rotation axis serving as a center, when the virtual base line is set to run a center of the rotation axis and separate the stator into left and right.Type: GrantFiled: February 27, 2006Date of Patent: March 31, 2009Assignee: Seiko Precision Inc.Inventors: Hisashi Kawamoto, Satoru Tada, Takashi Nakano
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Publication number: 20090059399Abstract: A lens drive apparatus includes a lens holder holding a lens, a gear rotated by rotational force of a driving source, and a cam gear meshed with the gear. The lens holder is moved in an optical path direction by the cam gear. The lens holder has an engagement portion engaged with a cam portion of the cam gear and is arranged to move in response to a change in the cam portion in conjunction with the rotation of the cam gear. The earn gear has a teeth portion composed of plural teeth arranged in a circular shape. The teeth portion has an non-meshed portion not meshed with the gear and thicker than other teeth. The number of the pluses or the number of the rotation of the driving source is preset, whereby a position of the lens holder is recognized.Type: ApplicationFiled: October 17, 2008Publication date: March 5, 2009Applicant: SEIKO PRECISION INC.Inventor: Hisashi KAWAMOTO
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Publication number: 20090003823Abstract: A shutter for an optical apparatus has multiple sectors and an operation member. Each of the multiple sectors has a cam opening for engagement and is pivotally provided to open and close a shutter opening, the operation member moves each of said multiple sectors in engagement with the cam opening, and the cam opening of at least one sector that is one of the multiple sectors is formed to change a moving direction of said at least one sector, when the operation member moves said at least one sector to a position to close the shutter opening.Type: ApplicationFiled: July 1, 2008Publication date: January 1, 2009Applicant: SEIKO PRECISION, INC.Inventors: Hisashi Kawamoto, Kazuya Shioda, Phichet Numnual