Position indicator
First Claim
1. A position indicator comprising:
- a cylindrical casing;
a columnar magnetic core provided within the cylindrical casing with an axial direction of the casing as a direction of a central axis of the magnetic core;
a coil wound so as to have the central axis of the columnar magnetic core as a center; and
a core body provided so as to have a tip portion exposed to an outside from an opening formed on one end side in the axial direction of the cylindrical casing,wherein the magnetic core has a flat cross-sectional shape, the cross-sectional shape resulting from a cross section of the magnetic core taken in a direction perpendicular to the direction of the central axis of the magnetic core, and has a tapered portion formed on a side of the tip portion of the core body in the direction of the central axis of the magnetic core, the tapered portion being tapered off toward the tip portion of the core body,wherein the cross-sectional shape of the magnetic core is a noncircular shape at least partially having a curved surface.
1 Assignment
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Accused Products
Abstract
A position indicator includes a columnar magnetic core provided within a cylindrical casing with an axial direction of the casing as a direction of a central axis of the magnetic core. A coil is wound so as to have the central axis of the columnar magnetic core as a center. A core body is provided so as to have a tip portion exposed to an outside from an opening formed on one end side in the axial direction of the cylindrical casing. The magnetic core has a flat cross-sectional shape, and has a tapered portion formed on a side of the tip portion of the core body in the direction of the central axis of the magnetic core, the tapered portion being tapered off toward the tip portion of the core body.
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Citations
16 Claims
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1. A position indicator comprising:
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a cylindrical casing; a columnar magnetic core provided within the cylindrical casing with an axial direction of the casing as a direction of a central axis of the magnetic core; a coil wound so as to have the central axis of the columnar magnetic core as a center; and a core body provided so as to have a tip portion exposed to an outside from an opening formed on one end side in the axial direction of the cylindrical casing, wherein the magnetic core has a flat cross-sectional shape, the cross-sectional shape resulting from a cross section of the magnetic core taken in a direction perpendicular to the direction of the central axis of the magnetic core, and has a tapered portion formed on a side of the tip portion of the core body in the direction of the central axis of the magnetic core, the tapered portion being tapered off toward the tip portion of the core body, wherein the cross-sectional shape of the magnetic core is a noncircular shape at least partially having a curved surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of forming a position indicator, the method comprising:
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providing a columnar magnetic core within a cylindrical casing with an axial direction of the casing as a direction of a central axis of the magnetic core; winding a coil so as to have the central axis of the columnar magnetic core as a center; and providing a core body so as to have a tip portion exposed to an outside from an opening formed on one end side in the axial direction of the cylindrical casing, wherein the magnetic core has a flat cross-sectional shape, the cross-sectional shape resulting from a cross section of the magnetic core taken in a direction perpendicular to the direction of the central axis of the magnetic core, and has a tapered portion formed on a side of the tip portion of the core body in the direction of the central axis of the magnetic core, the tapered portion being tapered off toward the tip portion of the core body, wherein the cross-sectional shape of the magnetic core is a noncircular shape at least partially having a curved surface. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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Specification