Patents by Inventor Yukihiko Koshimizu

Yukihiko Koshimizu 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).

  • Objective lens drive device, optical pickup device, and disk drive device
    Patent number: 7092173
    Abstract: A lens holder portion 3 for holding an objective lens 5 is supported on an end side of each of four suspension wires 2 so that it is capable of moving in a focusing direction and in a tracking direction. Minute uneven faces 2a are formed in the surface of each suspension wire 2. Adhesive agent 11 which fixes each suspension wire 2 on the lens holder 3 and fixing member 4 invades into dented portions in this uneven face 2a and hardens, thereby producing an anchor effect to improve bonding strength. Consequently, in an objective lens drive unit 1 in which the lens holder 3 is supported by a plurality of suspension wires 2, bonding strength to the suspension wire 2 can be improved.
    Type: Grant
    Filed: April 9, 2004
    Date of Patent: August 15, 2006
    Assignee: Sony Corporation
    Inventors: Takahiro Miyagi, Yukihiko Koshimizu, Kenji Saka, Hiroshi Kitazawa
  • Objective lens drive device, optical pickup device, and disk drive device
    Publication number: 20050231829
    Abstract: A lens holder portion 3 for holding an objective lens 5 is supported on an end side of each of four suspension wires 2 so that it is capable of moving in a focusing direction and in a tracking direction. Minute uneven faces 2a are formed in the surface of each suspension wire 2. Adhesive agent 11 which fixes each suspension wire 2 on the lens holder 3 and fixing member 4 invades into dented portions in this uneven face 2a and hardens, thereby producing an anchor effect to improve bonding strength. Consequently, in an objective lens drive unit 1 in which the lens holder 3 is supported by a plurality of suspension wires 2, bonding strength to the suspension wire 2 can be improved.
    Type: Application
    Filed: April 9, 2004
    Publication date: October 20, 2005
    Inventors: Takahiro Miyagi, Yukihiko Koshimizu, Kenji Saka, Hiroshi Kitazawa