Patents by Inventor Izuru SADAMATSU

Izuru SADAMATSU 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: 11984277
    Abstract: A push switch contains a case including a housing space having an upper-opening and including fixed-contacts disposed on a bottom of the housing space, a movable contact member disposed in the housing space configured to deform in response to receiving pressure applied from above, and contacting the fixed-contacts upon defoming in response to the received pressure, and a pushing member disposed on the movable contact member and configured to transmit the received pressure to the movable contact member. The movable contact member includes a pair of first-linear edges, wherein the pushing member includes a plurality of projecting-pressing portions disposed on a bottom surface of the pushing member facing the movable contact member, and wherein the plurality of pressing portions is disposed on the bottom surface at positions not overlapping a straight-line that passes through a center of the movable contact member and intersecting each of the pair of first-linear edges.
    Type: Grant
    Filed: February 28, 2022
    Date of Patent: May 14, 2024
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Takuya Suzuki, Izuru Sadamatsu, Katsutoshi Usui, Shinya Makino
  • Publication number: 20220230821
    Abstract: A push switch contains a case including a housing space having an upper-opening and including fixed-contacts disposed on a bottom of the housing space, a movable contact member disposed in the housing space configured to deform in response to receiving pressure applied from above, and contacting the fixed-contacts upon defoming in response to the received pressure, and a pushing member disposed on the movable contact member and configured to transmit the received pressure to the movable contact member. The movable contact member includes a pair of first-linear edges, wherein the pushing member includes a plurality of projecting-pressing portions disposed on a bottom surface of the pushing member facing the movable contact member, and wherein the plurality of pressing portions is disposed on the bottom surface at positions not overlapping a straight-line that passes through a center of the movable contact member and intersecting each of the pair of first-linear edges.
    Type: Application
    Filed: February 28, 2022
    Publication date: July 21, 2022
    Inventors: Takuya SUZUKI, Izuru SADAMATSU, Katsutoshi USUI, Shinya MAKINO
  • Patent number: 10529505
    Abstract: A push switch 1 includes a movable contact member 20 with a bulging portion 20a. The push switch 1 has a fixed contact member 10 with a first fixed contact portion 10a and a second fixed contact portion 10b. The push switch 1 includes an electrically conductive vibration damping member 25 elastically deformable by an operating force lower than load for inversion operation of the bulging portion 20a. When the movable contact member 20 is operated from the initial state, the vibration damping member 25 is deflected due to elastic deformation while the operating force during the elastic deformation of the vibration damping member 25 increases monotonically. When the movable contact member 20 returns from the bulging portion 20a being in an inverted state to the initial state, the vibration damping member 25 absorbs the vibrations from the movable contact member 20.
    Type: Grant
    Filed: January 29, 2018
    Date of Patent: January 7, 2020
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Yuki Yashima, Izuru Sadamatsu, Toshihiko Tazawa
  • Patent number: 10290442
    Abstract: A push switch includes a movable contact including a dome part that is shaped like a dome and configured to be inverted in shape when pressed, and a fixed contact including a first fixed contact, the movable contact being configured to be brought into contact with and away from the first fixed contact. The push switch is configured such that an operating load necessary to press the movable contact gradually increases after the movable contact starts to be pressed, decreases thereafter when the dome part is inverted, and increases again when the movable contact is further pressed, and the dome part contacts the first fixed contact after an inflection point at which the decreased operating load starts to increase again.
    Type: Grant
    Filed: September 15, 2017
    Date of Patent: May 14, 2019
    Assignee: ALPS ALPINE CO., LTD.
    Inventors: Yuki Yashima, Izuru Sadamatsu, Toshihiko Tazawa
  • Publication number: 20180151313
    Abstract: A push switch 1 includes a movable contact member 20 with a bulging portion 20a. The push switch 1 has a fixed contact member 10 with a first fixed contact portion 10a and a second fixed contact portion 10b. The push switch 1 includes an electrically conductive vibration damping member 25 elastically deformable by an operating force lower than load for inversion operation of the bulging portion 20a. When the movable contact member 20 is operated from the initial state, the vibration damping member 25 is deflected due to elastic deformation while the operating force during the elastic deformation of the vibration damping member 25 increases monotonically. When the movable contact member 20 returns from the bulging portion 20a being in an inverted state to the initial state, the vibration damping member 25 absorbs the vibrations from the movable contact member 20.
    Type: Application
    Filed: January 29, 2018
    Publication date: May 31, 2018
    Inventors: Yuki YASHIMA, Izuru SADAMATSU, Toshihiko TAZAWA
  • Publication number: 20180005777
    Abstract: A push switch includes a movable contact including a dome part that is shaped like a dome and configured to be inverted in shape when pressed, and a fixed contact including a first fixed contact, the movable contact being configured to be brought into contact with and away from the first fixed contact. The push switch is configured such that an operating load necessary to press the movable contact gradually increases after the movable contact starts to be pressed, decreases thereafter when the dome part is inverted, and increases again when the movable contact is further pressed, and the dome part contacts the first fixed contact after an inflection point at which the decreased operating load starts to increase again.
    Type: Application
    Filed: September 15, 2017
    Publication date: January 4, 2018
    Inventors: Yuki YASHIMA, Izuru SADAMATSU, Toshihiko TAZAWA