Electronic pen, electronic pen cartridge, and electronic pen main unit

An electronic pen, comprising:

• a pen-shaped casing;
• a mounting part disposed in the pen-shaped casing;
• and
• an electronic pen cartridge mounted on the mounting part and including:
• an electronic pen main unit that includes:
• i) an interaction part configured to perform transmission and reception of signals with a position detecting sensor, ii) a tip part configured to be capable of protruding outside from an opening of the pen-shaped casing, and iii) a first coupling part provided at an end part opposite from the tip part in an axial center direction;
• and
• a mounting adapter interposed between the first coupling part and the mounting part, the mounting adapter including:
• i) a second coupling part configured to be detachably connectable to the first coupling part of the electronic pen main unit, ii) a third coupling part configured to be detachably connectable to the mounting part of the pen-shaped casing, and iii) an elastic component that, when the second coupling part is connected to the first coupling part, exerts an elastic force to separate the mounting adapter from the electronic pen main unit in the axial center direction, wherein the elastic component serves as a shock absorber against a shock load applied along the axial center direction.

An electronic pen main unit that forms an electronic pen cartridge,

• wherein the electronic pen cartridge includes a mounting adapter, the mounting adapter including:
• i) a second coupling part configured to be detachably connectable to the electronic pen main unit, ii) a third coupling part configured to be detachably connectable to a mounting part of a pen-shaped casing of an electronic pen, and iii) an elastic component that, when the second coupling part is connected to the electronic pen main unit, exerts an elastic force to separate the mounting adapter from the electronic pen main unit in an axial center direction, wherein the elastic component serves as a shock absorber against a shock load applied along the axial center direction,
• the electronic pen main unit comprising:
• i) an interaction part configured to perform transmission and reception of signals with a position detecting sensor;
• ii) a tip part configured to be capable of protruding outside from an opening of the pen-shaped casing;
• and
• iii) a first coupling part provided at an end part opposite from the tip part in the axial center direction and configured to be detachably connectable to the second coupling part of the mounting adapter.