Ball pen

摘要

A ballpoint pen wherein an outer member (50) covering the outer circumference of a holder (21) covers a section that reaches as far as a narrowed section (23) of the holder (21) and has an outer member tip end portion (51). An ink spreads between the writing ball (30) and the contact section of the writing surface and between the outer member tip end portion (51) and the contact section of the writing surface, in which the writing ball (30) and the outer member tip end portion (51) are in contact with the writing surface at the same time. The relative position of the outer member (50) and the holder (21) can be changed from a holder protruding position to a holder retracted position wherein the writing ball (30) and the tip section of the outer member (50) can be in contact with the writing surface at the same time.

主权项

1. A ballpoint pen configured to be capable of writing drawn lines of different widths using two writing portions; comprising:
a writing ball; a first writing portion holding the writing ball by a narrowed portion with a narrowed tip end; an ink supply portion supplying ink to the first writing portion; a shaft tube storing the ink supply portion therein; and a second writing portion covering an outer circumference of the first writing portion, a part of the second writing portion and a part of the first writing portion holding the writing ball being exposed from a tip end portion of the shaft tube; a displacement means capably changing a relative positional relation in an axial direction between the first writing portion and the second writing portion; the displacement means being formed so that, when a relative position of the first writing portion in relation to the second writing portion is at a retracting position of the first writing portion, a tip end portion of the first writing portion and a tip end portion of the second writing portion can make contact with the writing surface simultaneously.