Dynamic magnetic information storage or retrieval – Head mounting – For shifting head between tracks
Reexamination Certificate
2000-05-01
2001-08-21
Tupper, Robert S. (Department: 2754)
Dynamic magnetic information storage or retrieval
Head mounting
For shifting head between tracks
C360S266500, C360S266700
Reexamination Certificate
active
06278586
ABSTRACT:
SUMMARY OF THE INVENTION
It is therefore an object of this invention to provide a recording/reproducing device with a voice coil motor having a magnetic circuit device with a reduced number of components.
It is another object of this invention to provide a recording/reproducing device with a cost-effective and small-sized voice coil motor capable of providing a sufficient driving force.
It is still another object of this invention to provide a recording/reproducing device in which a voice coil is accurately attached to a predetermined position of a carriage assembly.
It is yet another object of this invention to provide a recording/reproducing device in which a voice coil is securely coupled to a carriage assembly with improved reliability.
It is a further object of this invention to provide a recording/reproducing device in which a voice coil is attached to a carriage assembly over a wide area to achieve reliable coupling.
According to this invention, there is provided a recording/reproducing device for use in recording and reproducing data on and from a recording medium while moving read/write head means relative to the recording medium in a moving direction, which comprises a carriage supporting the read/write head means; guide means fixedly disposed and slidably supporting the carriage for guiding the carriage in the moving direction; a voice coil motor for driving the carriage in the moving direction, the voice coil motor comprising a voice coil having a coil axis and a magnetic circuit device generating a magnetic field; the carriage having a coil holding portion projecting therefrom, the voice coil being fixedly held on the coil holding portion in the condition that the coil axis is arranged in the moving direction, the coil being applied with a driving electric current for driving the carriage; and the magnetic circuit device fixedly disposed adjacent to the voice coil to generate a magnetic field intersecting the driving current flowing through the voice coil, the voice coil moving in the moving direction together with the carriage by an interaction of the driving current and the magnetic field.
REFERENCES:
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patent: 5818666 (1998-10-01), Chaya
Itoh Toshimitsu
Majima Yoshihide
Shimazu Teruo
Shimizu Toshiharu
Frishauf, Holtz Goodman, Langer & Chick, P.C.
Mitsumi Electric Co. Ltd.
Tupper Robert S.
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