Patents by Inventor Keiji Jitsukawa

Keiji Jitsukawa 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: 9355673
    Abstract: The recording medium delivery mechanism includes a slider, a holding lever, a biasing portion, a lever-opening operation portion, and a housing and discharging drive unit. The slider is supported on a chassis to be movable in housing and discharging directions of a recording medium. The holding lever is rotatably supported by the slider and configured to hold the recording medium. The biasing portion is configured to bias the holding lever toward the recording medium. The lever-opening operation portion is provided to the holding lever, is engaged with a lever engagement portion provided to the chassis by a movement of the slider in the discharging direction of the recording medium, and configured to rotate the holding lever in a direction away from the recording medium. The housing and discharging drive unit is configured to move the chassis and the slider in the housing and discharging directions of the recording medium.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: May 31, 2016
    Assignee: Sony Corporation
    Inventors: Wataru Nonaka, Osamu Shimizu, Keiji Jitsukawa
  • Publication number: 20140301809
    Abstract: The recording medium delivery mechanism includes a slider, a holding lever, a biasing portion, a lever-opening operation portion, and a housing and discharging drive unit. The slider is supported on a chassis to be movable in housing and discharging directions of a recording medium. The holding lever is rotatably supported by the slider and configured to hold the recording medium. The biasing portion is configured to bias the holding lever toward the recording medium. The lever-opening operation portion is provided to the holding lever, is engaged with a lever engagement portion provided to the chassis by a movement of the slider in the discharging direction of the recording medium, and configured to rotate the holding lever in a direction away from the recording medium. The housing and discharging drive unit is configured to move the chassis and the slider in the housing and discharging directions of the recording medium.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 9, 2014
    Applicant: Sony Corporation
    Inventors: Wataru Nonaka, Osamu Shimizu, Keiji Jitsukawa
  • Patent number: 8141109
    Abstract: A disc drive apparatus includes: an outer casing; a disc drive unit that includes a disc table on which a disc-like recording medium is mounted, a spindle motor, an optical pickup, and a pickup base; a slider that includes a main body and a rack gear, is movable in a first direction as an insertion direction and a second direction as an ejection direction, and moves in the second direction during loading and moved in the first direction during ejection; a drive motor functioning as a drive source of the slider; a deceleration gear group that intermeshes with the rack gear; an eject lever that is rotated to press the recording medium during the ejection; and a link member coupled with the eject lever, the slider including a lock plate and a slide plate.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: March 20, 2012
    Assignees: Sony Corporation, Sony Optiarc Inc.
    Inventors: Hisashi Negoro, Keiji Jitsukawa, Mitsuru Iba, Shunsuke Nirei, Tomoyasu Takaoka
  • Patent number: 7958520
    Abstract: A disk drive device includes: a rotary arm rotatable according to loading of a disk between a draw-in position and an eject position for ejecting the disk from a housing; a drive mechanism providing driving force for the rotary arm; a link arm mechanism interconnecting the rotary arm and the drive mechanism and rotating the rotary arm from an insertion position to the eject position when ejecting the disk; and a guide cam having a guide edge on which a guide projection of the link arm mechanism slides when ejecting the disk to rotate the rotary arm in an ejecting direction via the link arm mechanism, the guide projection moving around the guide cam from insertion to ejection of the disk. Engagement between the guide projection and the guide edge is released when a force opposite to a rotation direction is applied to the rotary arm when ejecting the disk.
    Type: Grant
    Filed: August 9, 2007
    Date of Patent: June 7, 2011
    Assignees: Sony Corporation, Sony NEC Optiarc Inc.
    Inventors: Keiji Jitsukawa, Noriyoshi Ishii, Kiyoshi Omori, Katsunori Takahashi, Tomoyasu Takaoka, Yuji Suzuki, Shigeru Tamura, Satoshi Muto
  • Publication number: 20110061067
    Abstract: A disc drive apparatus includes: an outer casing; a disc drive unit that includes a disc table on which a disc-like recording medium is mounted, a spindle motor, an optical pickup, and a pickup base; a slider that includes a main body and a rack gear, is movable in a first direction as an insertion direction and a second direction as an ejection direction, and moves in the second direction during loading and moved in the first direction during ejection; a drive motor functioning as a drive source of the slider; a deceleration gear group that intermeshes with the rack gear; an eject lever that is rotated to press the recording medium during the ejection; and a link member coupled with the eject lever, the slider including a lock plate and a slide plate.
    Type: Application
    Filed: August 30, 2010
    Publication date: March 10, 2011
    Applicants: Sony Corporation, Sony Optiarc Inc.
    Inventors: Hisashi Negoro, Keiji Jitsukawa, Mitsuru Iba, Shunsuke Nirei, Tomoyasu Takaoka
  • Patent number: 7594240
    Abstract: The present invention is directed to a disk drive apparatus in which an optical disk (2) is detachably loaded, and comprises a casing (3) including a front panel (18) in which a disk insertion/withdrawal hole (19) of which length in length direction is caused to be substantially the same as the diameter of the optical disk, and a biasing member (70) for biasing plural rotational arms (61), (62) for holding the outer circumference of the optical disk therebetween in a predetermined direction in accordance with carrying position of the optical disk, wherein, between the disk insertion/withdrawal position and the disk loading position, there are provided a disk carrying mechanism (60) for performing carrying operation of the optical disk, a disk loading portion (41) to which the optical disk is loaded, a disk rotation drive mechanism (42) for optical disk, an optical pick-up (43) for performing recording and/or reproduction of information signals with respect to the optical disk, and a pick-up feed mechanism (44
    Type: Grant
    Filed: April 12, 2006
    Date of Patent: September 22, 2009
    Assignee: Sony Corporation
    Inventors: Kiyoshi Omori, Yuji Suzuki, Takashi Ootsuka, Keiji Jitsukawa, Satoshi Muto, Koji Natsubori, Hidekuni Aizawa
  • Patent number: 7467395
    Abstract: A disc drive device which can discharge a disc in an optimum discharge amount in the disc drive device dealing with discs having different thickness and weight. A disc drive device including a disc conveying mechanism formed with a supporting portion to support the optical disc, and having a plurality of arms rotatably supported in the housing, and an energizing member for rotatably energizing the plurality of the rotary arms in a predetermined direction, and conveying the optical disc between a disc mounting position for holding the optical disc inserted into the housing in the disc holding portion and a disc insertion/removal position for inserting/removing the optical disc, the top cover having a control portion for controlling a rotary region of the plurality of rotary arms which energizes the optical disc in the discharging direction by contact with the plurality of rotary arms supporting the outer peripheral surface of the disc.
    Type: Grant
    Filed: October 31, 2005
    Date of Patent: December 16, 2008
    Assignee: Sony Corporation
    Inventors: Kiyoshi Omori, Yuji Suzuki, Takashi Ootsuka, Keiji Jitsukawa, Satoshi Muto, Koji Natsubori, Hidekuni Aizawa
  • Publication number: 20080046900
    Abstract: A disk drive device includes: a rotary arm rotatable according to loading of a disk between a draw-in position and an eject position for ejecting the disk from a housing; a drive mechanism providing driving force for the rotary arm; a link arm mechanism interconnecting the rotary arm and the drive mechanism and rotating the rotary arm from an insertion position to the eject position when ejecting the disk; and a guide cam having a guide edge on which a guide projection of the link arm mechanism slides when ejecting the disk to rotate the rotary arm in an ejecting direction via the link arm mechanism, the guide projection moving around the guide cam from insertion to ejection of the disk. Engagement between the guide projection and the guide edge is released when a force opposite to a rotation direction is applied to the rotary arm when ejecting the disk.
    Type: Application
    Filed: August 9, 2007
    Publication date: February 21, 2008
    Applicant: Sony NEC Optiarc Inc.
    Inventors: Keiji JITSUKAWA, Noriyoshi Ishii, Kiyoshi Omori, Katsunori Takahashi, Tomoyasu Takaoka, Yuji Suzuki, Shigeru Tamura, Satoshi Muto
  • Publication number: 20060184953
    Abstract: The present invention is directed to a disk drive apparatus in which an optical disk (2) is detachably loaded, and comprises a casing (3) including a front panel (18) in which a disk insertion/withdrawal hole (19) of which length in length direction is caused to be substantially the same as the diameter of the optical disk, and a biasing member (70) for biasing plural rotational arms (61), (62) for holding the outer circumference of the optical disk therebetween in a predetermined direction in accordance with carrying position of the optical disk, wherein, between the disk insertion/withdrawal position and the disk loading position, there are provided a disk carrying mechanism (60) for performing carrying operation of the optical disk, a disk loading portion (41) to which the optical disk is loaded, a disk rotation drive mechanism (42) for optical disk, an optical pick-up (43) for performing recording and/or reproduction of information signals with respect to the optical disk, and a pick-up feed mechanism (44
    Type: Application
    Filed: April 12, 2006
    Publication date: August 17, 2006
    Applicant: Sony Corporation
    Inventors: Kiyoshi Omori, Yuji Suzuki, Takashi Ootsuka, Keiji Jitsukawa, Satoshi Muto, Koji Natsubori, Hidekuni Aizawa
  • Publication number: 20060095926
    Abstract: To provide a disc drive device which can discharge a disc in an optimum discharge amount in the disc drive device dealing with a disc having different thickness and weight.
    Type: Application
    Filed: October 31, 2005
    Publication date: May 4, 2006
    Applicant: SONY CORPORATION
    Inventors: Kiyoshi Omori, Yuji Suzuki, Takashi Ootsuka, Keiji Jitsukawa, Satoshi Muto, Koji Natsubori, Hidekuni Aizawa
  • Patent number: 6822843
    Abstract: An external storage device connected to electronic equipment through a cable includes a switch for selecting functions of the main unit of the external storage device. A user freely sets the function of the external storage device by simply operating the switch. This arrangement eliminates the need for disassembling the external storage device to switch the function thereof. The switch may be externally exposed out of the case of the external storage device.
    Type: Grant
    Filed: February 19, 2002
    Date of Patent: November 23, 2004
    Assignee: Sony Computer Entertainment Inc.
    Inventor: Keiji Jitsukawa
  • Patent number: 6714405
    Abstract: A vibration damping apparatus is provided with a main body, an elastic deformation section provided on the main body, and a projection which is made to follow the actions of the elastic deformation section and deform in every direction. The elastic deformation section acts as a damper to enable the vibration damping apparatus to dampen external vibrations transferred to the projection. For that reason, in recording/reproducing apparatus and other electronic apparatus on which the vibration damping apparatus is installed, it is possible to realize a reduction in the time needed to write to and read from a recording medium.
    Type: Grant
    Filed: May 6, 2002
    Date of Patent: March 30, 2004
    Assignee: Sony Computer Entertainment Inc.
    Inventor: Keiji Jitsukawa
  • Publication number: 20020179807
    Abstract: A vibration damping apparatus is provided with a main body, an elastic deformation section provided on the main body, and a projection which is made to follow the actions of the elastic deformation section and deform in every direction. The elastic deformation section acts as a damper to enable the vibration damping apparatus to dampen external vibrations transferred to the projection. For that reason, in recording/reproducing apparatus and other electronic apparatus on which the vibration damping apparatus is installed, it is possible to realize a reduction in the time needed to write to and read from a recording medium.
    Type: Application
    Filed: May 6, 2002
    Publication date: December 5, 2002
    Applicant: Sony Computer Entertainment Inc.
    Inventor: Keiji Jitsukawa
  • Publication number: 20020121813
    Abstract: An external storage device connected to electronic equipment through a cable includes a switch for selecting functions of the main unit of the external storage device. A user freely sets the function of the external storage device by simply operating the switch. This arrangement eliminates the need for disassembling the external storage device to switch the function thereof. The switch may be externally exposed out of the case of the external storage device.
    Type: Application
    Filed: February 19, 2002
    Publication date: September 5, 2002
    Inventor: Keiji Jitsukawa
  • Patent number: 6392839
    Abstract: A recording/reproducing apparatus including a door member having its upper edge abutted against a lower edge of a forward stationary plate. The lower end of the stationary plate and the upper edge of the door member are formed with inclined surfaces that are inclined relative to the direction of insertion and detachment of a recording medium. When the recording medium is inserted, the door member is rotated by having its inclined surface thrust by the forward edge of the recording medium so as to be separated from the forward stationary plate to open the front side of the cartridge holder holding the recording medium to prevent intrusion of dust and dirt into the inside of the apparatus.
    Type: Grant
    Filed: March 12, 1999
    Date of Patent: May 21, 2002
    Assignee: Sony Corporation
    Inventor: Keiji Jitsukawa
  • Publication number: 20010028528
    Abstract: A recording/reproducing apparatus including a door member having its upper edge abutted against a lower edge of a forward stationary plate. The lower end of the stationary plate and the upper edge of the door member are formed with inclined surfaces that are inclined relative to the direction of insertion and detachment of a recording medium. When the recording medium is inserted, the door member is rotated by having its inclined surface thrust by the forward edge of the recording medium so as to be separated from the forward stationary plate to open the front side of the cartridge holder holding the recording medium to prevent intrusion of dust and dirt into the inside of the apparatus.
    Type: Application
    Filed: March 12, 1999
    Publication date: October 11, 2001
    Inventor: KEIJI JITSUKAWA