Apparatus for reducing starting adhesion between a magnetic disc and flying head
AssigneeHitachi, Ltd.
InventorsHiroshi Nishida, Toshiyuki Haruna
Life of this patent
Estimating the term…
Abstract
In a magnetic disc memory apparatus in which a magnetic head is in contact with a surface of a magnetic disc when the disc is stationary and caused to float upon rotation of the disc, the magnetic head contacting the magnetic disc is slightly moved in the radial direction of the disc immediately before rotation of the disc, whereby the rotation of the magnetic disc is started after adhesion between the magnetic disc and the magnetic head has been obviated.
Claims12
A magnetic memory disc apparatus in which a magnetic head is in contact with a surface of a magnetic disc substantially at all times when the magnetic disc is stationary and caused to float upon rotation of the magnetic disc, comprising:
- a magnetic disc;
- a magnetic head supporting member;
- a gimbal mounted on said magnetic head supporting member at one end thereof;
- a magnetic head mounted on said gimbal;
- magnetic head positioning means for positioning said magnetic head at a desired track on said magnetic disc by way of said magnetic head supporting member;
- means for rotating said magnetic disc;
- and control means for energizing said magnetic head positioning means and said means for rotating said magnetic disc, said control means prior to energizing said means for rotating said magnetic disc energizing said magnetic head positioning means to displace said magnetic head from a contact position thereof with a surface of said magnetic disc in a radial direction of said magnetic disc so as to obviate adhesion between said magnetic head and said magnetic disc before starting rotation of said magnetic disc.
A magnetic disc memory apparatus in which a magnetic head is in contact with a surface of a magnetic disc substantially at all times when the magnetic disc is stationary and caused to float upon rotation of the magnetic disc, comprising:
- a magnetic disc;
- a shaft;
- a magnetic head supporting member mounted rotatably on said shaft;
- a gimbal mounted on said magnetic head supporting member at one end thereof;
- a magnetic head mounted on said gimbal;
- a cam follower mounted on said magnetic head supporting member at the other end thereof;
- a cam disposed so as to be contacted to said cam follower, a stepper motor on which said cam is mounted;
- means for rotating said magnetic disc;
- and control means for energizing said stepper motor and said means for rotating said magnetic disc, said control means prior to energizing said means for rotating said magnetic disc energizing said stepper motor to move said magnetic head from a contact position thereof with a surface of said magnetic disc in a direction radially of said magnetic disc so as to obviate adhesion between said magnetic head and said magnetic disc before starting rotation of said magnetic disc.
A magnetic disc memory apparatus comprising a magnetic disc, a magnetic head, means for supporting said magnetic head so that said magnetic head is in contact with a surface of said magnetic disc substantially at all times when said magnetic disc is stationary and for enabling said magnetic disc to float upon rotation of said magnetic disc, magnetic head positioning means for positioning said magnetic head at a desired track on said magnetic disc by way of said magnetic head supporting means, means for rotating said magnetic disc, and control means for energizing said magnetic head positioning means and said means for rotating said magnetic disc, said control means prior to energizing said means for rotating said magnetic disc energizing said magnetic head positioning means to displace said magnetic head from a contact position thereof with a surface of said magnetic disc in a radial direction of said magnetic disc so as to obviate adhesion between said magnetic head and said magnetic disc before starting rotation of said magnetic disc.
Dependencies are inferred from the claim text.