Patents by Inventor Risa MATSUMURA

Risa MATSUMURA 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).

  • Linear vibration actuator and mobile communication device or gaming device including the same
    Patent number: 9621015
    Abstract: A linear vibration actuator for which the positional accuracy of coils in the casing can be easily increased. A linear vibration actuator (1) in which a magnet (13) and a weight (15) are fixed. The magnet (13) and the shaft (20) form a magnetic circuit within a casing (2) causing reciprocating motion of the weight (15) and magnet (13), via a coil (24) within a casing (2). The linear actuator (1) includes a shaft (20) provided within the casing (2) and made from a magnetic material. A coil (24) is supported by the shaft (20) includes first and second coil parts (22, 23) arranged parallel to an axial line L and wound in opposing directions. A ring-like magnet (13) surrounds the coil (24) and the shaft (20). A weight is fixed to the magnet. A plate spring (17) biases the magnet (13) and the weight (15) along the shaft (20).
    Type: Grant
    Filed: February 14, 2014
    Date of Patent: April 11, 2017
    Assignee: NIDEC COPAL CORPORATION
    Inventors: Yoshinori Katada, Hirohiko Sonoki, Daisuke Higashi, Risa Matsumura, Sayaka Ueno, Honami Nakazawa, Yoshihide Tonogai
  • LINEAR VIBRATION ACTUATOR AND MOBILE COMMUNICATION DEVICE OR GAMING DEVICE INCLUDING THE SAME
    Publication number: 20140232211
    Abstract: A linear vibration actuator for which the positional accuracy of coils in the casing can be easily increased. A linear vibration actuator (1) in which a magnet (13) and a weight (15) are fixed. The magnet (13) and the shaft (20) form a magnetic circuit within a casing (2) causing reciprocating motion of the weight (15) and magnet (13), via a coil (24) within a casing (2). The linear actuator (1) includes a shaft (20) provided within the casing (2) and made from a magnetic material. A coil (24) is supported by the shaft (20) includes first and second coil parts (22, 23) arranged parallel to an axial line L and wound in opposing directions. A ring-like magnet (13) surrounds the coil (24) and the shaft (20). A weight is fixed to the magnet. A plate spring (17) biases the magnet (13) and the weight (15) along the shaft (20).
    Type: Application
    Filed: February 14, 2014
    Publication date: August 21, 2014
    Applicant: Nidec Copal Corporation
    Inventors: Yoshinori KATADA, Hirohiko SONOKI, Daisuke HIGASHI, Risa MATSUMURA, Sayaka UENO, Honami NAKAZAWA, Yoshihide TONOGAI