Patents by Inventor Hirohito OHNO

Hirohito OHNO 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).

  • Speaker device having diaphragm with folded portion
    Patent number: 10277976
    Abstract: Provided is a speaker device achieving thinning and cost reduction. The speaker device includes a first speaker unit and a second speaker unit. An outer peripheral side of the speaker unit is provided with a folded portion protruding to an opposite side of a sound emission direction P. A flat portion is provided inside the folded portion. An opening is provided inside the flat portion. A voice coil bobbin is secured to the opening. A speaker unit is arranged in the voice coil bobbin. An external-magnet-type magnetic circuit is provided in the speaker unit. As a magnet of the magnetic circuit, a ferrite magnet having a large volume is used.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: April 30, 2019
    Assignees: PIONEER CORPORATION, TOHOKU PIONEER CORPORATION
    Inventors: Kenichi Oshima, Koji Takayama, Hirohito Ohno, Hiroyuki Dohi, Hayami Kondo
  • Two-way speaker device having diaphragm of second speaker unit inside voice coil bobbin of first speaker unit
    Patent number: 10264347
    Abstract: Provided is a speaker device achieving thinning and cost reduction. The speaker device includes a first speaker unit having a first diaphragm connected to a voice coil bobbin, and a second speaker unit having a second diaphragm provided inside the voice coil bobbin. When a sound emission direction P of the first speaker unit and the second speaker unit is upward and an opposite direction of the sound emission direction P is downward, a position of an upper end A of the first diaphragm is substantially equal to an upper end B of the second diaphragm.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: April 16, 2019
    Assignees: PIONEER CORPORATION, TOHOKU PIONEER CORPORATION
    Inventors: Kenichi Oshima, Koji Takayama, Hirohito Ohno, Hiroyuki Dohi, Hayami Kondo
  • SPEAKER DEVICE
    Publication number: 20170359647
    Abstract: Provided is a speaker device achieving thinning and cost reduction. The speaker device includes a first speaker unit having a first diaphragm connected to a voice coil bobbin, and a second speaker unit having a second diaphragm provided inside the voice coil bobbin. When a sound emission direction P of the first speaker unit and the second speaker unit is upward and an opposite direction of the sound emission direction P is downward, a position of an upper end A of the first diaphragm is substantially equal to an upper end B of the second diaphragm.
    Type: Application
    Filed: December 8, 2015
    Publication date: December 14, 2017
    Inventors: Kenichi OSHIMA, Koji TAKAYAMA, Hirohito OHNO, Hiroyuki DOHI, Hayami KONDO
  • SPEAKER DEVICE
    Publication number: 20170347184
    Abstract: Provided is a speaker device achieving thinning and cost reduction. The speaker device includes a first speaker unit and a second speaker unit. An outer peripheral side of the speaker unit is provided with a folded portion protruding to an opposite side of a sound emission direction P. A flat portion is provided inside the folded portion. An opening is provided inside the flat portion. A voice coil bobbin is secured to the opening. A speaker unit is arranged in the voice coil bobbin. An external-magnet-type magnetic circuit is provided in the speaker unit. As a magnet of the magnetic circuit, a ferrite magnet having a large volume is used.
    Type: Application
    Filed: December 8, 2015
    Publication date: November 30, 2017
    Inventors: Kenichi OSHIMA, Koji TAKAYAMA, Hirohito OHNO, Hiroyuki DOHI, Hayami KONDO