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US 5,045,738 AGranted
Spindle motor
AssigneeNippon Densan Corporation
InventorsNoriaki Hishida, Kuniyasu Iwazaki
Life of this patent
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AssigneeNippon Densan Corporation
InventorsNoriaki Hishida, Kuniyasu Iwazaki
Estimating the term…
A spindle motor having a shaft member secured to a fitting member, a rotary member which is rotatable relatively to the shaft member, a rotor magnet fitted to the rotary member in such a manner that the rotor magnet confronts the rotor magnet and a stator, wherein a pair of inner annular grooves are formed in the shaft member, a pair of outer annular grooves are formed in the rotary member and a plurality of ball members are accommodated in ball-accommodating space defined by these annular grooves. A spindle motor having a fitting member having a hollow cylindrical portion, a shaft member which is rotatable relatively to the fitting member, a rotary member secured to the shaft member, a rotor magnet fitted to the rotary member and a stator disposed in such a manner that the stator confronts the rotor magnet, wherein a pair of inner annular grooves are formed in the shaft member, a pair of outer annular grooves are formed in the inner surface of the cylindrical portion and a plurality of ball members are accommodated in a ball-accommodating space defined by these annular grooves.
A spindle motor comprising a fitting member, a shaft member secured to said fitting member, a rotary hub member disposed about said shaft member for carrying a recording disk thereabout and for rotation relative to said shaft member, a rotor magnet fitted to said rotary member and a stator positioned in such a manner as to confront said rotor magnet, wherein:
A spindle motor comprising a fitting body, a fitting member projecting substantially perpendicularly from said fitting body and having a hollow cylindrical portion, a shaft member disposed in said hollow cylindrical portion and rotatable relatively to said hollow cylindrical portion, a rotary hub member for carrying a recording disk thereabout secured to said shaft member, a rotor magnet fitted to said rotary hub member and a stator disposed in such a manner as to confront said rotor magnet, wherein:
A spindle motor comprising a fitting body, a fitting member having a cylindrical portion projecting substantially perpendicularly from said fitting body, a shaft member secured to said fitting member, a sleeve member rotatably fitted to said shaft member via a plurality of lines of ball members, a rotary member secured to said sleeve member, a rotor magnet fitted to the inner surface of said rotary member and a stator fitted to the outer surface of said cylindrical portion in such a manner that said stator confronts said rotor magnet, wherein:
A spindle motor comprising a fitting body, a fitting member having an annular projection projecting from said fitting body, a sleeve member secured to said fitting member, a shaft member rotatably fitted to the inside of said sleeve member via a plural lines of ball members, a rotary member secured to said shaft member, a rotor magnet fitted to the inner surface of said rotary member and a stator fitted to said annular projection in such a manner that said stator confronts said rotor magnet wherein:
Dependencies are inferred from the claim text.