Electrical device, such as vacuum cleaner, has light guidance arrangement mounted in device's housing with one end at housing surface and other end near receiver or transmitter

摘要

The device has a receiver or transmitter (12) mounted in its housing (4) and a transmitter or receiver arranged spatially separately from the receiver or transmitter. A light guidance arrangement is mounted in the housing with one end (10) at the housing surface and the other end (11) near the receiver or transmitter. The light guidance arrangement can be an optical conductor (9), an optical waveguide or air.