초록 ▼

A motor structure for driving discs includes a motor having a frame wall and a hollow holding cylinder extending generally perpendicular from the frame wall, a rotor shaft coaxially disposed in the hollow holding cylinder, and bearings mounted on the hollow holding cylinder for rotatably supporting

A motor structure for driving discs includes a motor having a frame wall and a hollow holding cylinder extending generally perpendicular from the frame wall, a rotor shaft coaxially disposed in the hollow holding cylinder, and bearings mounted on the hollow holding cylinder for rotatably supporting the rotor shaft. The holding cylinder has an outer part, and a coil is mounted on the outer part. A cup-shaped rotor is mounted on the rotor shaft, the cup-shaped rotor having an end wall, a first cylinder portion extending coaxially from the end wall, and a second cylindrical portion juxtaposed to the first cylindrical portion. The first cylindrical portion has a diameter which is less than the diameter of the second cylindrical portion, the coil being generally axially aligned with and being disposed radially inwardly of the second cylindrical portion. A magnet is mounted on the second cylindrical portion radially outwardly of the coil, and a shield is mounted on the rotor and extends radially inwardly of the first cylindrical portion for shielding the discs from the magnetic field of the motor.

대표청구항 ▼

A motor structure for driving discs comprising a motor means having a frame wall and a hollow holding cylinder extending generally perpendicular from said frame wall, a rotor shaft coaxially disposed in said hollow holding cylinder, bearing means mounted on said hollow holding cylinder for rotatably

A motor structure for driving discs comprising a motor means having a frame wall and a hollow holding cylinder extending generally perpendicular from said frame wall, a rotor shaft coaxially disposed in said hollow holding cylinder, bearing means mounted on said hollow holding cylinder for rotatably supporting said rotor shaft, said holding cylinder having an outer part, coil means mounted on said outer part of said holding cylinder, a cup-shaped rotor means mounted on said rotor shaft, said cup-shaped rotor means having an end wall, a first cylindrical portion extending coaxially from said end wall, and a second cylindrical portion juxtaposed to said first cylindrical portion, said first cylindrical portion having a diameter which is less than the diameter of said second cylindrical portion, said coil means being generally axially aligned with and being disposed radially inwardly of said second cylindrical portion, magnet means mounted on said second cylindrical portion radially outwardly of said coil means, and shield means mounted on said rotor means and extending radially inwardly of said first cylindrical portion for shielding said discs from the magnetic field of said motor means.