Magnetic disc device having head control mechanism capable of effecting head contact during high speed medium rotation
AssigneesAlps Electric Co., Ltd., Sony Corporation
InventorsIsao Asano, Kouzou Onodera
Life of this patent
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Abstract
When loading an upper head, it is brought into contact with a disc, with a lower head being in contact with the disc. In this process, the entire surface of the upper head which slides on the disc and in which gaps are provided is brought into contact with the disc at a position off the data zone. Further, the upper head is provided with a supported member, and a support member supporting the supported member, whereby the upper head is supported before coming into contact with the disc, and the upper head is gradually brought close to the disc to effect contact.
Claims3
A magnetic disc device of the type which includes a medium having data zones on a top portion of the medium and data zones on a bottom portion of the medium, where the data zones on the top portion deviate from the data zones on the bottom portion of the medium, and a plurality of heads which are opposed to the medium and whose head gaps are offset, the plurality of heads consisting of a first head at which it is opposed to the medium at a predetermined position and a second head which is movable towards to and away from the medium, the magnetic disc device comprising a head control mechanism which causes a slide surface of the first head to be brought into contact with the data zones on the bottom portion of the medium by a first pressurizing force, and which causes a slide surface of the second head to be brought into contact with the medium at a position offset from the data zones on the top portion by a second pressurizing force that is higher than the first pressurizing force.
Dependencies are inferred from the claim text.