Electronic pen and cartridge-type electronic pen main body including a conductive first electrode and a second electrode

An electronic pen, comprising:

• a housing with an opening on one end thereof forming a pen tip side in an axial direction, and
• at least one electronic pen main body inside the housing, the electronic pen main body including:
• a conductive first electrode of which one end in the axial direction forms a pen tip;
• a second electrode disposed proximally to a pen rear side of the first electrode, the second electrode being insulated from the first electrode;
• and
• a main body part incorporating a signal transmission circuit generating a signal supplied at least to the first electrode;
• wherein,
• a pen rear side of the second electrode is coupled with a pen tip side of the main body part in the axial direction,
• the main body part is not projected to outside from the opening of the housing of the electronic pen,
• the second electrode and the main body part coupled with each other form a hollow space therein in which a fitting part for the first electrode is disposed,
• the first electrode is detachably fitted to the fitting part, and
• when the one end of the first electrode forming the pen tip is projected to the outside from the opening of the housing of the electronic pen, at least a portion of the second electrode is also projected to the outside from the opening such that both the one end of the first electrode and the portion of the second electrode are projected beyond a distal end of the housing of the electronic pen to capacitively couple with a sensor surface.