| 摘要 |
PROBLEM TO BE SOLVED: To provide an encoder equipped with a multiple rotation detector part with higher output voltage and good efficiency capable of miniaturization and thickness reduction by making dispense with the dedicated space for a magnetic member for detecting the multiple rotation. SOLUTION: The main body of the encoder for measuring the displacement of an object to be measured comprises: a code disk 4 for measuring the displacement of the measurement object; a magnetic body of rotation 6 for counting n rotations (n is an integer or a fraction excluding n=0); a magnetic detector elements 7 oppositely arranged with at least a part of the magnetic body of rotation 6, for detecting n rotations of the magnetic body of rotation 6; a magnetic member 8 preferably arranged on the other side of a substrate 3 mounted with the magnetic detector elements 7, for imparting bias magnetic field to the magnetic detector elements 7. The magnetic encoder is constituted such that the body of rotation 6 is facing to the magnetic detection elements 7 through the code disk 4. COPYRIGHT: (C)2006,JPO&NCIPI |
