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    • 5. 发明专利
    • Trackball device, and an electronic component using this
    • JP4000744B2
    • 2007-10-31
    • JP2000076202
    • 2000-03-17
    • 松下電器産業株式会社
    • 保 山本茂 横地豊史 福村
    • G06F3/033G06F3/038G09G5/08
    • PROBLEM TO BE SOLVED: To provide a track ball device to be operated with fine accuracy by generating a sense of click in the case of a rotating operation of a ball and to simultaneously make a person feel no play in the case of an operation regarding the track ball device to operate movement of a cursor on a display screen. SOLUTION: The track ball device to be operated with fine accuracy by generating the sense of click in the case of the rotating operation and to make the person feel no play in the case of the operation is realized by freely rotatably supporting the ball 8 by rollers 2 to 5 two sets of which of opposite two pieces are orthogonally crossed, providing ratchet gears 2C to 5C on which serrated teeth 2B to 5B each of which are inclined in the reverse directions are provided, rotational direction regulating parts 2E to 5E consisting of restraint pawls 2D to 5D to be flexibly brought into contact with the ratchet gears and to restrain rotation of the roller in the reverse direction on circular peripherals of the opposite rollers 2 to 5 and arranging rotation switches 18 to 21 as rotation quantity detecting parts to each of the rollers 2 to 5.