Pen-shaped coordinate pointing device
First Claim
1. A pen-shaped coordinate pointing device for indicating a position to be measured and an operation by an operator to a position detecting device for measuring the position, said pen-shaped coordinate pointing device comprising:
- a coil wound on a core having an end face with no opening; and
a magnetic member placed along the axis of said coil so as to be opposed to said end face of said core, wherein said core and said magnetic member are spaced from each other and are moved closer together in response to an operation by the operator.
1 Assignment
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Accused Products
Abstract
In an input pen having a pen-shaped casing, a ferrite core with a coil wound thereon and a ferrite chip are placed opposed to each other via an O-ring. The ferrite chip has a projection. When the input pen is operated, the projection and the ferrite core are moved closer together. When the ferrite chip is moved closer to the ferrite core during operation, the projection is placed substantially close to the ferrite core. Therefore, high responsivity is ensured without moving the ferrite chip into the coil, and there is no need to form an opening or a cavity in the ferrite core.
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Citations
47 Claims
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1. A pen-shaped coordinate pointing device for indicating a position to be measured and an operation by an operator to a position detecting device for measuring the position, said pen-shaped coordinate pointing device comprising:
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a coil wound on a core having an end face with no opening; and
a magnetic member placed along the axis of said coil so as to be opposed to said end face of said core, wherein said core and said magnetic member are spaced from each other and are moved closer together in response to an operation by the operator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A pointing device for cooperation with a tablet, comprising:
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a) a core having a first end face;
b) a coil wound about at least a portion of said core; and
c) a magnetic member having a second end face spaced from and movable relative to said fiest end face. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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23. A pointing device, comprising:
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a) a tablet having at least a first set of loop coils for generating and receiving radio waves; and
b) an input pen comprising a casing, a lead, a magnetic member operably associated with said lead and having an first end face movable therewith relative to said casing, a core having a second end face spaced from said first end face, a coil wound about at least a portion of said core, and a tuning circuit operably associated with said core for receiving and generating radio waves in response to operation of said loop coils.
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40. A method of changing the inductance of a coil of an input pen of a pointing device, comprising the steps of:
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a) positioning a core having a first end face within a housing of an input pen, a coil being wound about said core;
b) positioning a magnetic member having a second end face opposed to the first end face within the housing, the second end face spaced from said first end face and said magnetic member movable relative to the core;
c) associating a lead with the magnetic member, so that movement of the lead causes associate movement of the magnetic member; and
d) positioning the lead on the surface of a tablet and moving the lead and thereby the magnetic member through application of pressure to the housing and thereby causing the inductance of the coil to be changed. - View Dependent Claims (41, 42, 43)
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44. A method of assembling an input pen, comprising the steps of:
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a) providing a hollow casing;
b) positioning a tuning circuit within the casing;
c) positioning a core within the casing in operable association with the tuning circuit, a coil being wrapped around the core;
d) positioning a magnetic member at an end of the casing in coaxial relation with the core, a portion of the magnetic member extending from the casing and another portion being spaced from the core, the magnetic member being movable relative to the core for changing the inductance of the coil. - View Dependent Claims (45, 46, 47)
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Specification