| 摘要 |
PURPOSE: A disk type BLCD(Brushless Direct Current) motor back yoke plate securing arrangement is provided to reduce cost and enhance productivity by avoiding additional fastening members. CONSTITUTION: A back yoke plate(130) is provided shaped as a ring. On the plane thereof, arc-shaped location holes(131) are provided on the same circle so that a sensor can detect the position of a permanent magnet(121a). On both sides of the outer periphery, at least two semi-circular catch protrusions(132) are provided. Catch grooves(121b) are provided in the upper and lower sides of a rotation disk(121) to prevent the back yoke plate(130) from being released in the rotation of the rotation disk(121). The back yoke plate(130) preferably has a width at least same as that of the permanent magnet(121a) except the points where the catch protrusions(132) are defined.
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