Patent ID: 6697215
Filing Date: 2004-02-24
Classification: H02K,H05K

Abstract:
An index signal output device comprising:a magnet attached to a rotor yoke of a spindle motor; and a magnetic flux detector, located on the stator side opposite to the rotor yoke, which detects a magnetic flux generated by the magnet and issues an index signal, a carrier printed wiring board for supporting lead terminals of the magnetic flux detector around the ends of the magnetic flux detector, wherein the position of the magnetic flux detector is adjustable so that the phase difference between an index signal detected by the magnetic flux detector and an index reference signal previously recorded on a floppy disk is within a prescribed range, wherein the carrier printed wiring board is fitted in a slit formed in a printed circuit board so as to be guided in a direction of a relevant tangent to the outer circumference of the rotor yoke, wherein a portion of the carrier printed wiring board facing the top surface of the printed circuit board through the slit has through-holes perpendicular to the slit, through which the lead terminals of the magnetic flux detector extend, and wherein the lead terminals of the magnetic flux detector extending through the through-holes of the carrier printed wiring board are connected to detection signal output terminals on the printed circuit board, and the position of the magnetic flux detector is adjusted by flexing the lead terminals to move the magnetic flux detector in the tangent direction.