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

An electronic pen that includes a tubular pen housing having an opening at one end in an axial direction of the pen housing, the one end being a pen tip side, at least one electronic pen cartridge being housed in the pen housing,

• wherein the electronic pen cartridge includes
• a tubular cartridge housing,
• an electronic circuit that is disposed in the cartridge housing and that includes a signal transmission circuit configured to generate a signal to be supplied to a position detection sensor,
• a rechargeable power storage device that is disposed in the cartridge housing and that is configured to supply a power supply voltage to the electronic circuit, and
• a coil wound around an outside of a portion of the cartridge housing, the portion being located at a position where there is room in the pen housing, and
• wherein the power storage device is configured to be charged by a current induced in the coil based on an externally supplied magnetic field.

An electronic pen charging tray for an electronic pen that includes a tubular pen housing having an opening at one end in an axial direction of the pen housing, the one end being a pen tip side, at least one electronic pen cartridge being housed in the pen housing,

• the electronic pen cartridge including
• a tubular cartridge housing,
• an electronic circuit that is disposed in the cartridge housing and that includes a signal transmission circuit configured to generate a signal to be supplied to a position detection sensor,
• a rechargeable power storage device that is disposed in the cartridge housing and that is configured to supply a power supply voltage to the electronic circuit, and
• a coil wound around an outside of a portion of the cartridge housing, the portion being located at a position where there is room in the pen housing,
• wherein the power storage device is configured to be charged by a current induced in the coil based on an externally supplied magnetic field,
• wherein the electronic pen charging tray comprises:
• a recess configured to receive and lock the electronic pen placed therein, the recess having a length greater than a length of the pen housing of the electronic pen in the axial direction of the pen housing;
• a magnetic-field generation coil disposed to form a magnetic flux in a direction along the axial direction of the electronic pen placed and locked in the recess;
• and
• an alternating-current signal generation circuit configured to generate and supply an alternating-current signal to the magnetic-field generation coil, which generates an alternating-current magnetic field.