| 摘要 |
PROBLEM TO BE SOLVED: To provide a position detector that includes magnetic flux density detection means that detects magnetic flux density with a wide dynamic range, and that has high position detecting accuracy over a wide range within a moving range of a detection object.SOLUTION: A position detector includes: a magnet 40 that is provided between one end of a first magnetic flux transmitting portion 20 and one end of a second magnetic flux transmitting portion 30; a magnet 50 that is provided between the other end of the first magnetic flux transmitting portion 20 and the other end of the second magnetic flux transmitting portion 30; a Hall IC 60 that is provided in a mold portion 9 so as to be relatively movable with respect to a rotor 12 in an opening 101 and that outputs a signal corresponding to density of a magnetic flux through which the Hall IC 60 passes; a third magnetic flux transmitting portion 45 that is provided between one end of the first magnetic flux transmitting portion 20 and one end of the second magnetic flux transmitting portion 30 in non-contact with the first magnetic flux transmitting portion 20, the second magnetic flux transmitting portion 30, and the magnet 40; and a fourth magnetic flux transmitting portion 55 that is provided between the other end of the first magnetic flux transmitting portion 20 and the other end of the second magnetic flux transmitting portion 30 in non-contact with the first magnetic flux transmitting portion 20, the second magnetic flux transmitting portion 30, and the magnet 50. |
