Position pointer
AssigneeWacom Co., Ltd.
InventorsTakenori Kaneda, Hiroyuki Fujitsuka
Life of this patent
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Abstract
Various embodiments provide a position pointer that includes a plurality of refill bodies that can be configured at low cost, and ensures freedom from malfunction during exchange of signals with a sensor section of a position detection device. In one embodiment, the position pointer includes a tubular housing having an opening portion, a plurality of refill bodies, a refill body selection mechanism section that selectively causes at least a tip of one of the plurality of refill bodies to project from the opening portion, a magnetic material core, and a coil wound around the magnetic material core. The refill bodies not selected by the refill body selection mechanism section are located away from a through hole of the magnetic material core.
Claims14
A position pointer, comprising:
- a tubular housing having an opening;
- a plurality of refill bodies in the tubular housing;
- a magnetic material core positioned adjacent to the opening of the tubular housing, the magnetic material core having a through hole;
- a coil wound around the magnetic material core;
- a capacitor, the capacitor and the coil forming a resonance circuit;
- a refill body selector which, in operation, projects at least a tip of a selected refill body of the plurality of refill bodies from the opening, extends the selected refill body through the through hole of the magnetic material core, and spaces an unselected refill body of the plurality of refill bodies away from the magnetic core;
- a plurality of writing pressure detectors, each of the plurality of writing pressure detectors being coupled to a respective refill body of the plurality of refill bodies at a side of the respective refill body that is opposite to a tip of the respective refill body, each of the plurality of writing pressure detectors, in operation, detects a pressure applied to the respective refill body;
- and
- a control circuit configured to activate the resonance circuit in response a pressure equal to or greater than a predetermined value being detected by any one of the plurality of writing pressure detectors, and deactivate the resonance circuit in response to the pressure equal to or greater than the predetermined value not being detected by all of the plurality of writing pressure detectors.
Dependencies are inferred from the claim text.