Magnetic head used in magnetooptical recording
AssigneeCanon Kabushiki Kaisha
InventorKazuyoshi Ishii
Life of this patent
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Abstract
A magnetic head includes a substrate, a magnetic pole formed on the substrate and a two-layered magnetic field generation coil. A conductive wire is sequentially wound around a core sandwiched between regulating members from its middle portion from the inner periphery side toward the outer periphery side while the two end portions of the conductive wire are simultaneously rotated in opposite directions, so that the two-layered magnetic field generation coil is provided.
Claims12
A magnetic head comprising:
- a base;
- and
- a magnetic field generation coil provided on said base and wound in a plane configuration, wherein said coil is wound from its middle portion from an inner periphery toward an outer periphery on said base, while opposite ends of the coil are rotated in opposite directions, so that no recess for accommodating a lead wire drawn from the inner periphery of the coil is provided on said base.
A magneto-optical recording apparatus comprising:
- an optical head for radiating a light beam onto a magneto-optical recording medium;
- a magnetic head for applying a magnetic field onto the magneto-optical recording medium, said magnetic head comprising a base and a magnetic field generation coil provided in said base and wound in a plane configuration, wherein said coil is wound from its middle portion from an inner periphery toward an outer periphery on said base, while opposite ends of the coil are rotated in opposite directions, so that no recess for accommodating a lead wire drawn from the inner periphery of the coil is provided on said base;
- and
- driving means for driving said magnetic head.
A method of winding a magnetic field generation coil for a magnetic head, comprising the steps of:
- arranging a base in which a core member is provided and in which no groove is provided in the vicinity of the core member;
- arranging the middle portion of a magnetic field generation coil wound around the core member;
- and
- subsequently winding the coil from an inner periphery toward an outer periphery on the base, while rotating opposite ends of the coil in opposite directions.
A magnetic field generation coil winding device comprising:
- a base provided with a core member and having no groove in the vicinity of the core member;
- and
- winding means for winding a magnetic field generation coil around the core member, said winding means arranging the middle portion of the magnetic field generation coil around the core member and subsequently winding the coil from an inner periphery toward an outer periphery on the base, while rotating opposite ends of the coil in opposite directions.
Dependencies are inferred from the claim text.