| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a state detection device for detecting a state by canceling, even if exposed to an external magnetic field, the influence thereof; and to provide a buckle device using the same. <P>SOLUTION: A buckle switch 2 serving as the state detection device includes: a housing 201 which is a casing; a slide portion 202 which is movably supported by the housing 201; a magnet 203 which is a permanent magnet moving in linking with the slide portion 202; a GMR sensor 210A serving as a first magnetic detector and positioned correspondingly to a first movement position of the magnet 203; a GMR sensor 210B serving as a second magnetic detector which is positioned correspondingly to a second movement position of the magnet 203 and is connected to the GMR sensor 210A in series; and a bias magnet 212 which gives a bias magnetic field to the first and second magnetic detectors. Output from a connection part between the GMR sensor 210A and the GMR sensor 210B is detected as a state of a position where the magnet 203 moves. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
