Propulsion bar driver for e.g. window, has multi-edged shaft with set of teeth having a profile section consisting of another set of teeth to clamp the polygon portion of the shaft between the itself and the profile section

摘要

A multi-edged shaft (10) has a set of teeth (13) having a profile section (14) consisting of another set of teeth (21) to clamp the polygon portion (20) of the shaft between the itself and the profile section.