Electronic device in a housing with activation key

摘要

The device (1) has a blind hole (5) plunging inside a housing (3) that accommodates a key (6) whose one end is equipped with a magnetic unit i.e. magnet (7) for producing magnetic field. The magnetic field actuates a switch (4) e.g. reed switch, housed in the housing to trigger starting of electronics, where components of the housing are not accessible after assembly of two complementary parts of the housing. A circuit allows an opposite action on the switch, where the electronics includes a wireless-transmitter.