Protecting a read/write head from damage

• US 5,243,591 A
• Filed: 04/16/1991
• Issued: 09/07/1993
• Est. Priority Date: 04/23/1990
• Status: Expired due to Fees

• Current Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
• Original Assignee: Asahi Kogaku Kogyo Kabushiki Kaisha
• Inventors: Mogamiya, Makoto
• Primary Examiner(s): LaRoche, Eugene R.
• Assistant Examiner(s): Nguyen, Tan
• Application Number:
  US07/685,731
• Time in Patent Office: 875 Days
• Field of Search: 369/215, 369/219, 369/71, 369/72, 369/244, 369/292, 360/104, 360/105, 360/106, 360/128, 360/137, 360/109
• US Class Current: 360/255.1
• CPC Class Codes: G11B 21/12 Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position otherwise than during transducing operation
• CPC Class Codes: G11B 21/16 Supporting the heads; Supporting the sockets for plug-in heads
• CPC Class Codes: G11B 7/08582 Sled-type positioners

Abstract

A disk storage device, such as a magnetic disk storage device, for reading data from and writing data to a magnetic data storage disk includes a spindle onto a base for rotating the magnetic storage disk and a read/write head for reading data from and writing data to the magnetic storage disk. The read/write head is supported on a carriage which is movably mounted on the base for radially moving with respect to the spindle. A support plate is mounted on the carriage for retractably supporting the read/write head. An actuator mechanism actuates the support plate to move the read/write head between a nonretractable, operative position and a retracted, inoperative position. When the disk is not accessed by the read/write head, the read/write head is held in the retracted, inoperative position. Therefore, when the disk is replaced with another disk, the read/write head is prevented from being damaged or smeared with dust or dirt by contact with the disk.

Claims

1. A disk storage device, comprising:

a base;

rotative drive means mounted on said base for rotating a data storage disk, said rotative drive means having a spindle for rotating said data storage disk;

a read/write head for reading data from and writing data to said storage disk;

a carriage that is movably mounted on said base, said read/write head being supported on said carriage;

carriage moving means mounted on said base for radially moving said carriage between an inner access region and an outer data-free region;

support means mounted on said carriage for retractably supporting said read/write head; and

actuator means for actuating said support means to rotate said read/write head between a non-retractable operative position and a retracted inoperative position in which said read/write head is protected from damage or dirt, wherein said head is retracted to said retracted position when said carriage moves said head to said outer data-free region.

2. A disk storage device according to claim 1, wherein said carriage moving means comprises means for moving said carriage to move said read/write head between a radially inner access region and a radially outer data-free region, said actuator means comprising means for moving said read/write head from said operative position to said inoperative position when said read/write head is moved from said access region to said data-free region, and for moving said read/write head from said inoperative position to said operative position when said read/write head is moved from said data-free region to said access region.

3. A disk storage device according to claim 2, wherein said support means comprises a support plate that is angularly movably mounted on said carriage, said read/write head being supported on said support plate, said actuator means comprising means for angularly moving said support plate in a first direction to move said read/write head from said operative position to said inoperative position, and for angularly moving said support plate in a second direction to move said read/write head from said inoperative position to said operative position, and wherein said actuator means comprises spring means mounted on said carriage for biasing said support plate in said second direction, stop means mounted on said carriage for engaging said support plate under a bias of said spring means, thereby holding said read/write head in said operative position, and engaging means mounted on said base for engaging said support plate in response to a radially outward movement of said carriage with respect to said spindle, thereby angularly moving said support plate in said first direction against said bias of said spring means.

4. A disk storage device according to claim 1, further comprising means for substantially covering said read/write head so as to protect said read/write head when said read/write head is in said retracted inoperative position.

5. A disk storage device according to claim 1, further comprising means for cleaning a functional surface of said read/write head when said read/write head is in said retracted inoperative position.

6. A disk storage device according to claim 5, wherein said cleaning means comprises a cleaning member mounted on said carriage.

7. A disk storage device according to claim 6, wherein said cleaning member comprises a roller, said cleaning means further comprising roller rotating means for rotating said roller.

8. A disk storage device according to claim 7, wherein said roller rotating means comprises a shaft that is rotatably supported on said carriage, said roller being concentrically fixed to said shaft, a gear being fixed to said shaft, and a rack being mounted on said base and extending in a direction in which said carriage is movable, said gear being held in mesh with said rack, so that said roller can be rotated by said rack in response to a movement of said carriage.

9. A disk storage device, comprising:

a base;

rotative drive means mounted on said base for rotating a data storage disk, said rotative drive means having a spindle for rotating said data storage disk;

a head for at least reading data from said storage disk or writing data to said storage disk;

a carriage that is movably mounted on said base, said head being supported on said carriage;

carriage moving means mounted on said base for radially moving said carriage between an inner access region and an outer data-free region;

support means mounted on said carriage for retractably supporting said head;

means for actuating said support means to rotate said head between a non-retractable operative position and a retracted inoperative position, wherein said head is retracted to said retracted position when said carriage moves said head to said outer data-free region; and

a cleaning member that is mounted on said carriage for cleaning a functional surface of said head when said head is in said retracted inoperative position.

10. The disk storage device of claim 9, wherein said cleaning member comprises a roller and means for rotating said roller.

11. The disk storage device of claim 10, wherein said roller rotating means comprises a shaft that is rotatably supported on said carriage, said roller being concentrically fixed to said shaft, a gear being fixed to said shaft, and a rack being mounted on said base and extending in a direction in which said carriage is movable, said gear being held in mesh with said rack, so that said roller is rotated by said rack in response to a movement of said carriage.

12. The disk storage device of claim 9, wherein said carriage moving means comprises means for moving said carriage so as to move said head between a radially inner access region and a radially outer data-free region.

13. The disk storage device of claim 12, wherein said actuator means comprises means for moving said head from said operative position to said inoperative position when said head is moved from said access region to said data-free region, and for moving said head from said inoperative position to said operative position when said head is moved from said data-free region to said access region.

14. The disk storage device of claim 13, wherein said support means comprises a support plate that is angularly movably mounted on said carriage, said head being supported on said support plate, said actuator means comprising means for angularly moving said support plate in a first direction to move said head from said operative position to said inoperative position, and for angularly moving said support plate in a second direction to move said head from said inoperative position to said operative position, and wherein said actuator means comprises spring means mounted on said carriage for biasing said support plate in said second direction, stop means mounted on said carriage for engaging said support plate under a bias of said spring means, thereby holding said head in said operative position, and engaging means mounted on said base for engaging said support plate in response to a radially outward movement of said carriage with respect to said spindle, thereby angularly moving said support plate in said first direction against said bias of said spring means.

15. The disk storage device of claim 9, further comprising means for substantially covering said head so as to protect said head when said head is in said retracted, inoperative position.

16. A disk storage device, comprising:

a spindle for rotating a storage disk;

a head for at least reading data from said storage disk or writing data to said storage disk;

a carriage for radially moving said head between an inner access region and an outer data-free region;

means for rotating said head between a nonretractable operative position and a retracted inoperative position with respect to said storage disk wherein said head is retracted to said retracted position when said carriage moves said head to said outer data-free region; and

a cleaning member for cleaning a functional surface of said head when said head is in said retracted inoperative position.

17. The disk storage device of claim 16, further comprising a carriage that supports said head, said cleaning member being mounted on said carriage.

18. The disk storage device of claim 16, wherein said cleaning member comprises a roller and means for rotating said roller.

19. The disk storage device of claim 18, wherein a shaft is rotatably supported on a carriage, said roller being concentrically fixed to said shaft, a gear being fixed to said shaft, and a rack being mounted on a base and extending in a direction in which said carriage is movable, said gear being held in mesh with said rack, so that said roller is rotated by said rack in response to a movement of said carriage.

20. A disk storage device, comprising:

a data storage disk;

a head for accessing said data storage disk;

means for supporting said head for a radial movement with respect to said disk between a radially inner access region and a radially outer data-free region; and

means for actuating said supporting means to rotate said head between a non-retracted, operative position and a retracted, inoperative position, wherein said head is retracted to said retracted position when said supporting means supports said head in said outer data-free region.

21. The disk storage device of claim 20, further comprising a cleaning member for cleaning a functional surface of said head when said head is in said retracted, inoperative position.

22. The disk storage device of claim 21, wherein said cleaning member comprises a roller and means for rotating said roller.