Construction group of pen has element projecting into window in form of addition to push-in part

摘要

The construction group includes a push-in part (12) and an outer shell (10) with insertion aperture and window (14), into which a projecting element (16) projects. The element projecting into the window is in the form of an addition to the push-in part. The outer shell is of variable internal size so that the projecting element can fit in it.