Patent ID: 11874977
Assignee: WACOM CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G  B | IPC G

Claim 7:
8. A cartridge-type electronic pen main body allowing at least a pen tip of an electronic pen to be housed in a cylindrical housing of the electronic pen in such a manner as to be projectable from one opening of the cylindrical housing in an axial direction, the cartridge-type electronic pen main body comprising:
a conductive center electrode of which one end in the axial direction forms the pen tip; and
a peripheral electrode disposed around the center electrode except at least for the pen tip, the peripheral electrode being insulated from the center electrode, wherein the peripheral electrode includes a tapered part on a pen tip side and a cylindrical shaped part on an opposite side along the axial direction,
wherein, when the one end of the center electrode forming the pen tip is projected to the outside from the opening of the cylindrical housing of the electronic pen upon use, a portion of the tapered part of the peripheral electrode is also projected to the outside from the opening of the cylindrical housing of the electronic pen, such that both the one end of the center electrode and the portion of the tapered part of the peripheral electrode are projected beyond a distal end of the cylindrical housing of the electronic pen to capacitively couple with a sensor surface while the cylindrical shaped part of the peripheral electrode remains within the cylindrical housing of the electronic pen.