Patents by Inventor Yoshihiro Sekimoto

Yoshihiro Sekimoto 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: 4696566
    Abstract: A three-dimensional driving arrangement of an objective lens or the like, which is so arranged that coils for focusing control, tracking control and tangential control in three directions are disposed in one magnetic gap for compact size, while the coils for the tracking control and tangential control are each formed to have a V-shaped cross section, with going passage arms of the coils being disposed in the magnetic gap, but returning passage arms of them being disposed outside the magnetic gap through four slit-like notches formed in a yoke, thus making it possible to drive the objective lens independently in three directions.
    Type: Grant
    Filed: February 1, 1985
    Date of Patent: September 29, 1987
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshihiro Sekimoto, Shigeo Terashima, Kunio Kojima
  • Patent number: 4678276
    Abstract: An objective lens drive/support mechanism in an optical disc player system includes an objective lens support member which is slidably and rotatably secured to a main shaft of the mechanism. An objective lens is supported by the objective lens support member at a position which is separated from the main shaft by a predetermined distance. The objective lens support member is driven to slide along the main shaft to perform the focus control, and the objective lens support member is rotated around the main shaft to perform the tracking operation. A symmetrically "8" shaped elastic damping member is tightly secured to the main shaft at the center of the symmetrically "8" shaped elastic damping member. Both ends of the symmetrically "8" shaped elastic damping member are fixed to the objective lens support member, whereby the single symmetrically "8" shaped elastic damping member conducts the damping operation in both the focal direction and the tracking direction.
    Type: Grant
    Filed: December 14, 1984
    Date of Patent: July 7, 1987
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yoshihiro Sekimoto, Shigeo Terashima, Kiyoshi Kumata, Toshiyuki Tanaka