Electronic pen, electronic pen cartridge, and electronic pen charging tray

Abstract

An electronic pen cartridge is replaceable with a refill of a stationery ballpoint pen such that the stationery ballpoint pen housing can be reused as the electronic pen housing. The electronic pen cartridge is of a capacitance type and includes a pen tip which is projectable from an opening on one side in an axial direction of the pen housing. Inside the tubular cartridge housing are an electronic circuit including a signal transmission circuit configured to generate a signal to be supplied to a position detection sensor, and a rechargeable power storage device configured to supply a power supply voltage to the electronic circuit. A coil is wound around a portion of the cartridge housing, the portion located at a position where there is room in the pen housing. The power storage device is charged by a current induced in the coil based on an externally supplied magnetic field.