利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

656 条记录 (耗时 0.03 秒)

    POSITION DETECTION DEVICE
    1.
    发明公开
    POSITION DETECTION DEVICE 审中-公开

    公开(公告)号：US20240210213A1

    公开(公告)日：2024-06-27

    申请号：US18597013

    申请日：2024-03-06

    申请人： TDK CORPORATION

    发明人： Tsuyoshi UMEHARA ,  Hayato MIYASHITA ,  Keisuke UCHIDA ,  Hiraku HIRABAYASHI

    IPC分类号： G01D5/16 ,  G01D5/14 ,  G02B7/00 ,  G03B3/00 ,  G03B5/00

    CPC分类号： G01D5/16 ,  G01D5/145 ,  G02B7/00 ,  G03B3/00 ,  G03B5/00

    摘要： A position detection device includes a first position detector, a second position detector, and a signal generator. The first position detector includes a first magnetic field generation unit, a second magnetic field generation unit, and a first magnetic sensor. The second position detector includes a third magnetic field generation unit, a fourth magnetic field generation unit, and a second magnetic sensor. The positions of the second and fourth magnetic field generation units vary in response to variations in a detection-target position. The signal generator generates a position detection signal, which is the sum of a first detection signal generated by the first magnetic sensor and a second detection signal generated by the second magnetic sensor. Each of the first and second position detectors includes a bias magnetic field generation unit.

    Position detection device
    3.
    发明授权
    Position detection device 有权

    公开(公告)号：US11674822B2

    公开(公告)日：2023-06-13

    申请号：US16890284

    申请日：2020-06-02

    申请人： TDK CORPORATION

    发明人： Tsuyoshi Umehara ,  Hayato Miyashita ,  Keisuke Uchida ,  Hiraku Hirabayashi

    IPC分类号： G01D5/14 ,  G01D5/16 ,  G02B7/00 ,  G03B3/00 ,  G03B5/00

    CPC分类号： G01D5/16 ,  G01D5/145 ,  G02B7/00 ,  G03B3/00 ,  G03B5/00

    摘要： A position detection device includes a first position detector, a second position detector, and a signal generator. The first position detector includes a first magnetic field generation unit, a second magnetic field generation unit, and a first magnetic sensor. The second position detector includes a third magnetic field generation unit, a fourth magnetic field generation unit, and a second magnetic sensor. The positions of the second and fourth magnetic field generation units vary in response to variations in a detection-target position. The signal generator generates a position detection signal, which is the sum of a first detection signal generated by the first magnetic sensor and a second detection signal generated by the second magnetic sensor. Each of the first and second position detectors includes a bias magnetic field generation unit.

    LENS APPARATUS AND IMAGE PICKUP APPARATUS
    4.
    发明申请
    LENS APPARATUS AND IMAGE PICKUP APPARATUS 审中-公开

    公开(公告)号：US20190025539A1

    公开(公告)日：2019-01-24

    申请号：US16038280

    申请日：2018-07-18

    申请人： CANON KABUSHIKI KAISHA

    发明人： Takeru Yuri

    IPC分类号： G02B7/08 ,  G02B7/10

    CPC分类号： G02B7/08 ,  G02B7/021 ,  G02B7/04 ,  G02B7/10 ,  G03B3/00 ,  G03B5/00 ,  G03B17/12

    摘要： Provided is a lens apparatus, including: a fixed barrel; a first optical element; a rotary barrel configured to be rotated relative to the fixed barrel about an optical axis of the first optical element and move the first optical element; a contact member including rolling members respectively arranged at positions about the optical axis, the rolling members being into contact with the rotary barrel, the contact member being restricted in rotation relative to the fixed barrel about the optical axis; a pressing member pressing the contact member toward the rotary barrel; a second optical element being different from the first optical element; and an operation member configured to be rotated relative to the fixed barrel about the optical axis and move the second optical element, wherein a space, through which the operation member passes, is formed between two of the rolling elements in a circumference of the contact member.