Electronic pen and electronic pen core body

An electronic pen comprising:

• a housing including an opening portion on a pen tip side of the housing on a first end in an axial direction of the housing,
• wherein the opening portion has a pillar-shaped space with a predetermined length in the axial direction of the housing,
• wherein the axial direction of the housing is a center line direction of the pillar-shaped space, and
• wherein a hollow portion inside of the housing communicates with the pillar-shaped space of the opening portion;
• a pen pressure detector arranged in the hollow portion of the housing;
• and
• a core body including a tip portion on the first end in the axial direction of the housing, and an axial portion that extends from the tip portion toward a second end in the axial direction of the housing that is opposite the first end,
• wherein part of the tip portion, in operation, protrudes outside of the housing from an opening on a pen tip side of the pillar-shaped space of the opening portion of the housing,
• wherein the core body is installed such that the second end in the axial direction of the housing, in operation, transmits, to the pen pressure detector arranged in the hollow portion of the housing, pen pressure applied to the tip portion,
• wherein the tip portion of the core body contains fibers bundled in the axial direction of the housing,
• wherein the fibers bundled in the axial direction of the housing are exposed at a contact portion that, in operation, comes into contact with an input surface of a position detection sensor,
• wherein at least part of the tip portion of the core body that faces an inner circumferential wall surface of the opening portion on the pen tip side of the housing is covered by a material harder than the fibers bundled in the axial direction of the housing, and
• wherein the axial portion of the core body is not covered by the material harder than the fibers bundled in the axial direction of the housing.