Radio key for remote locking of motor vehicle uses key shaft and/or metal part of housing made as transmission antenna in order to increase transmission range of radio key

摘要

The radio key has a key shaft (4), electronics and a housing (1) containing a transmission antenna. In order to increase the transmission range of the radio key the key shaft and/or a part of the housing made of metal is used as a transmission antenna. The metal part of the housing is a key ring mounted on the housing.