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US 5,212,417 AGranted
Stepping motor for driving head carriage and disc drive unit comprising such motor
AssigneeTEAC Corporation
InventorsMichiaki Nagai, Takahiro Sakaguchi
Life of this patent
Estimating the term…
Abstract
A stepping motor for driving a head carriage having a motor axis on which is provided a lead screw comprises a seat plate that forms a back end of the motor, said seat plate being provided with a projection that projects toward a radial direction of the motor axis. At the time of the alignment of a head and a disk, the stepping motor is rotated by rotating a jig which is engaged with the projection. Thus the stationary position of the head carriage along a direction of its movement is adjusted.
Claims17
A stepping motor for driving a head carriage, for use in a disk drive unit comprising:
- a main part of the motor comprising a motor axis on which is formed a lead screw for driving a head carriage, a rotor for rotating said motor axis and a stationary part of the motor, said stationary part including a stator, a body of the motor, and a leaf that presses an end of said motor axis at said body of the motor, when installation in a disk drive unit is complete, by an elastic force directed along said motor axis;
- and
- an engagement part provided on said stationary part of the main part of the motor, said engagement part comprising one or more projections formed of a thin plate material, said projection projecting in a radial direction with respect to said motor axis and being bent so as to extend in a direction along said motor axis and toward said head carriage;
- said disk drive unit having a fixing means for fixing said main part of the motor in said unit;
- and
- said main part of the motor being rotationally controllable by means of a jig that is engaged with said engagement part, and being fixed by said fixing means after the position of the main part of the motor is rotationally controlled on the motor axis.
3 more elements
A disk drive unit comprising:
- a chassis;
- a head carriage guided and moved on guiding means fixed onto said chassis;
- a stepping motor comprising a main part of the motor comprising a motor axis on which is formed a lead screw for driving said head carriage, a rotor for rotating said motor axis, and a stationary part of the motor, said stationary part including a stator, a body of the motor and a leaf that presses an end of said motor axis at said body of the motor, when installation in said disk drive unit is complete, by an elastic force directed along said motor axis, and an engagement part provided on said stationary part of said main part of the motor, said engagement part comprising one or more projections of a thin plate material, said projection projecting in a radial direction of said motor axis and being are bent so as to extend in a direction along said motor axis and toward said head carriage;
- and
- a fixing means for fixing said main part of the motor to said chassis;
- said main part of the motor being rotationally controllable by means of a jig which is engaged with said engagement part, and being fixed by said fixing means after a position of the main part of the motor is rotationally controlled on the motor axis.
3 more elements
Dependencies are inferred from the claim text.