Dynamically loaded suspension for contact recording

• US 5,561,570 A
• Filed: 11/30/1994
• Issued: 10/01/1996
• Est. Priority Date: 02/26/1993
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Hiller, Bernhard, Gill, William D., Schreck, Erhard T.
• Primary Examiner(s): Levy, Stuart S.
• Assistant Examiner(s): KLIMOWICZ, WILLIAM JOSEPH
• Application Number:
  US08/348,772
• Time in Patent Office: 671 Days
• Field of Search: 360/102, 360/103, 360/104, 360/105, 360/106, 360/97.01, 360/97.02, 360/122
• US Class Current: 360/246.2
• CPC Class Codes: G11B 21/20 while the head is in operative position but stationary or permitting minor movements to follow irregularities in surface of record carrier
• CPC Class Codes: G11B 5/54 with provision for moving the head into or out of its operative position or across tracks
• CPC Class Codes: G11B 5/58 with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following spacing means incorporated in the head structure G11B5/187, G11B5/255, G11B5/3106

Abstract

The present invention mounts a contact recording transducer/suspension assembly over a magnetic recording disk such that the rotation of the disk creates an additional dynamic loading to counteract the lift-off forces generated by rotation of the disk. As the rotation rate of the disk is increased and lift-off forces grow, so do the offsetting dynamic loads created by the transducer/suspension assembly. Optionally, the cross section of the transducer/suspension assembly is modified to further improve this dynamic loading effect.

The present invention mounts the transducer/suspension assembly in a contact recoding disk file so as to place the assembly in compression once disk rotation is initiated. The assembly is mounted so that the frictional force between the assembly and the disk "pushes" the assembly against its mounting instead of applying a "pulling" force on the assembly.

Claims

1. A contact recording disk drive assembly comprising:

a housing;

at least one rigid data storage disk rotatably mounted in said housing;

an actuator arm positioned in said housing in proximity to said data storage disk;

a suspension assembly shaped to have a pad portion and having a distal and a proximal end, said distal end of said suspension forming a small, non-zero angle of less than five degrees with respect to the surface of said data storage disk, said pad portion located on said distal end of said suspension assembly and positioned for contact with said data storage disk, said proximal end of said suspension assembly coupled to said actuator arm;

a transducer located at said distal end of said suspension assembly, for reading and writing data on said data storage disk; and

means for rotating said data storage disk in said housing to move a point on said disk in a direction substantially from said distal end of said suspension assembly to said proximal end of said suspension assembly, such that when air generated by the rotation of said data storage disk impinges on said small angle of said distal end of said suspension assembly, said pad portion is in contact with said data storage disk.

2. A contact recording disk drive assembly according to claim 1, wherein said actuator arm is a rotary actuator arm.

3. A contact recording disk drive assembly according to claim 1 wherein said small angle is more than 0.5 and less than five degrees.

4. A contact recording disk drive assembly according to claim 1, wherein said small angle is more than 0.5 and less than two degrees.