Magnetic disk drive

• US 5,367,420 A
• Filed: 06/10/1992
• Issued: 11/22/1994
• Est. Priority Date: 06/10/1991
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Satou, Ryuzi, Arikawa, Yoshihiro, Yagi, Norio
• Primary Examiner(s): Casaregola, Louis J.
• Application Number:
  US07/896,711
• Time in Patent Office: 895 Days
• Field of Search: 360/104, 360/109, 360/103, 360/110, 360/137
• US Class Current: 360/244.5
• CPC Class Codes: G11B 25/043 using rotating discs
• CPC Class Codes: G11B 5/4813 Mounting or aligning of arm assemblies, e.g. actuator arm supported by bearings, multiple arm assemblies, arm stacks or multiple heads on single arm G11B5/484 takes precedence

Abstract

A magnetic disk drive comprises a plurality of disks that have a laminated arrangement with equally fixed spaces respectively, and are rotatably mounted, a disk driving unit that forces the disks to rotate, a plurality of positioners that are mounted movably in the normal direction to the tracks of the disks, respectively, a positioner driving unit that drives the positioners so that their respective ends can traverse the tracks, and a plurality of reproducing/recording elements e.g. unitary magnetic heads that are fixed on the respective ends of the positioners and perform read/write operations for the surfaces of recording media of the disks respectively. Each of the reproducing/recording elements is constructed such that each of the elements is adjustable in the rolling direction with respect to the respectively corresponding surface of recording media of the disks and adjustable in the distance from the respectively corresponding surface of recording media of the disks. Preferably, the method for assembling the disk drive includes the steps of locating the arras in a desired position, driving the sliding portions, detecting at least the degree of angle and relative distance between each one tip portion of the unitary magnetic heads and the respectively corresponding surfaces of recording media of the disks, and fixing the sliding portions and the guide portions to each other.

Claims

1. A magnetic disk drive comprising:

one or more disks having a laminated arrangement with equally fixed spaces, wherein the disks are mounted to allow rotation;

disk driving means for causing said disks to rotate;

one or more positioners each mounted to allow movement across the tracks of a selected disk said positioners having arcuate surfaces formed on an end portion of said positioners;

positioner driving means for driving said positioners so that their respective ends can traverse said tracks;

head supporting members attached to said positioners;

each of said head supporting members having an arcuate surface at a tip end portion;

one or more reproducing/recording elements fixed on said respective end portions of said head supporting members at said arcuate surfaces for performing read/write operations on the surfaces of recording media of said disks whereby each of said reproducing/recording elements is rotatably adjustable during assembly of said magnetic disk drive.

2. A magnetic disk drive as set forth in claim 1, wherein each of said reproducing/recording elements is further constructed such that each of the elements is adjustable in a direction perpendicular to the corresponding surface of the recording media of the corresponding disk.

3. A magnetic disk drive as set forth in claim 1, wherein each of said reproducing/recording elements is a unitary magnetic head, consisting of a body made of a flexible thin sheet, a head portion that is located on one tip portion of said body and has an air gap for reproducing or recording on one surface of said body, and a mounting portion that is formed on the opposite tip portion of said body.

4. A magnetic disk drive as set forth in claim 3:

said head supporting members each having a head mounting portion formed at said tip end portion, on which is fixed the opposite tip portion of said body of each of said unitary magnetic heads, and a base end portion where a sliding portion is formed; and

guide portions each formed on one end of each of said positioners and with which said sliding portion is rotatable and movable in the axial direction during assembly of said magnetic disk drive, and wherein said sliding portion is adapted to be attached to said guide portion.

5. A magnetic disk drive as set forth in claim 1, wherein each of said positioners includes a positioner body portion that constitutes the main part of each of said positioners, and a plurality of arms that are mounted on said positioners in a laminated manner respectively and one tip portion of which extends toward the respectively corresponding surfaces of recording media of said disks.

6. A magnetic disk drive as set forth in claim 4, wherein either one of said sliding portions and said guide portions has a circular cylinder form and the other one thereof has a corresponding arcuate surface that rotatably supports the outer peripheral surface of said circular cylinder.

7. A magnetic disk drive as set forth in claim 6, wherein said circular cylinder is the cylinder having a hollow portion inside;

said circular cylinder being adapted to enable lead wires extending from each of said unitary magnetic heads to pass through said hollow portion.

8. A magnetic disk drive as set forth in claim 4, wherein lead wires extending from each of said unitary magnetic heads are constructed so as to be wound around the outer surface of each of said head supporting members.

9. A magnetic disk drive as set forth in claim 4, wherein a flexible printed circuit board, which is mounted on one side of each of said positioners, is constructed so as to be wound around the outer surface of each of said head supporting members and wherein one end of said flexible printed circuit board is connected to lead wires extending from each of said unitary magnetic heads.

10. A magnetic disk drive as set forth in claim 4, wherein each of said head supporting members forms a tapered surface that has a given inclination to the respectively corresponding surface of the recording media of said disks.

11. A magnetic disk drive as set forth in claim 3, wherein it further comprises head supporting members each having a tip end portion that is mounted on one end of each of said positioners and a base end portion in which said mounting portion of each of said unitary magnetic heads is fabricated by molding.

12. A magnetic disk drive as set forth in claim 11, wherein a plurality of lead wires extending from each of said unitary magnetic heads are fabricated by molding simultaneously with said mounting portion of each of said unitary magnetic heads.

13. A magnetic disk drive as set forth in claim 5, wherein at least one arm portion functioning as said arm is integrated with each of said positioners as a portion thereof.