Claims
- 1. A magnetic record playback device, operable with a magnetic disk having opposite recording surfaces and being rotatable in a free rotary surface plane, comprising:
- a first, lower magnetic head disposed at a predetermined position with respect to the free rotary surface plane of said magnetic disk and opposing one recording surface of said magnetic disk;
- a second, upper magnetic head disposed opposing said first, lower magnetic head across said magnetic disk;
- a gimbal spring for supporting said second, upper magnetic head, said gimbal spring comprising an elastic member which deforms toward said magnetic disk so that said second, upper magnetic head contacts said magnetic disk while preventing said second, upper magnetic head from crushing said first, lower magnetic head during playback of said magnetic disk; and
- control portions formed individually on said first, lower and second, upper magnetic heads for generating a negative pressure between said respective control portions and said magnetic disk in association with rotation of said magnetic disk, wherein said negative pressure occurring at said first, lower magnetic head is greater than said negative pressure occurring at said second, upper magnetic head.
- 2. The magnetic record playback device according to claim 1, wherein said control portions, formed individually on said first, lower and second, upper magnetic heads, include respective areas which are asymmetrical with respect to each other for generating said negative pressure.
- 3. A method for playback of a magnetic disk, wherein a first, lower magnetic head including a control portion is positioned at a predetermined position with respect to a free rotary surface plane of the magnetic disk, and a second, upper magnetic head including a control portion is disposed opposing said first, lower magnetic head across the magnetic disk, and further wherein a negative pressure occurring at the control portion of said first, lower magnetic head is greater than a negative pressure occurring at the control portion of said second, upper magnetic head during rotation of the magnetic disk, the method comprising the steps of:
- (a) attracting and contacting the magnetic disk on said first, lower magnetic head by the negative pressure occurring between the magnetic disk and the control portion of said first, lower magnetic head while rotating the magnetic disk;
- (b) supporting said second, upper magnetic head by a gimbal spring, said gimbal spring comprising an elastic member which deforms toward the magnetic disk so that said second, upper magnetic head contacts the magnetic disk while preventing said second, upper magnetic head from crushing the first, lower magnetic head during playback of the magnetic disk; and
- (c) protruding said second, upper magnetic head to the predetermined position by virtue of the deformation of said gimbal spring in response to the negative pressure occurring between the magnetic disk and the control portion of said second, upper magnetic head during rotation of the magnetic disk, so as to contact the magnetic disk.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-103522 |
Apr 1989 |
JPX |
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Parent Case Info
This is a divisional of application No. 07/507,548 filed Apr. 11, 1990 now U.S. Pat. No. 5,107,384.
US Referenced Citations (8)
Foreign Referenced Citations (7)
Number |
Date |
Country |
53-29111 |
Mar 1978 |
JPX |
57-58268 |
Apr 1982 |
JPX |
61-224174 |
Oct 1986 |
JPX |
62-103871 |
May 1987 |
JPX |
63-18573 |
Jan 1988 |
JPX |
1-204266 |
Aug 1989 |
JPX |
2-49263 |
Feb 1990 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
507548 |
Apr 1990 |
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