WIPER ARM DEVICE, WIPER ARM, AND SCREEN WIPER SYSTEM

A wiper arm device for a wiper arm (), having at least one fastening part () which is provided for connecting at least one articulation part () of the wiper arm () to a drive shaft () of a wiper drive (), wherein the fastening part () has at least one fastening boss () for fastening the fastening part () to the drive shaft () and at least one articulation boss () for fastening the articulation part () to the fastening part ().