Means for protracting or retracting a ballpoint associated with a fountain or a felt-tip pen

摘要

This device is alternately charged by being translated the outside of pen end relative to the steel ball being fixed in pen main body, to provide falling off or covering for tip fescue grass ball. Spherical part is made of fixed part 7, fixed part 7 has the end of thread of pen central body 1, movable part 8 is slided thereon, the movable part 8 forms the outside of pen end by means of the device of slide key system type, and slide key system is placed on diametrically opposite two generator of pen. The connector of connector 7 and 8.