Writing instrument and electronic pen body section

A writing instrument comprising:

• a cylindrical outer housing, a first end of the outer housing having an outer opening;
• and
• an electronic pen body stored in the outer housing,
• wherein the electronic pen body includes:
• a stylus, a first end of the stylus in an axial direction of the stylus serving as a pen tip;
• a cylindrical inner housing storing the stylus, the first end of the stylus serving as the pen tip extending from an inner opening at a distal end of the inner housing, the inner opening of the inner housing defining one axial end of a hole extending axially forming a stylus guide that enables the stylus to move axially;
• a magnetic core disposed around at least part of the stylus;
• a coil wound around the magnetic core;
• and
• a capacitor connected to the coil,
• wherein, in operation, the pen tip of the stylus and a distal portion of the inner housing having the inner opening extend from the outer opening of the outer housing, and
• wherein the distal portion of the inner housing includes a magnetic core storage area in which part of the magnetic core is stored.