| 摘要 |
1. An anti-theft device for radio sets, comprising keys (Ti) and a microprocessor (11) which provides the control of a "radio" mode (21), and also the control of an "anti-theft" mode (31) the functions F'i of which are selected by means of the same control keys (Ti) for the functions (Fi) of the radio mode (21), reapplying voltage to the radio set, when the power supply has been cut, causing an access denoted the unintentional access, to the "anti-theft" mode (31) in the locked state and passage from the "anti-theft" mode in the locked state to the "radio" mode being obtained by applying to the microprocessor (11) a code which is identical to a code previously stored in a non-volatile memory (13) associated with the microprocessor, is characterized in that the microprocessor permits an access, denoted intentional access, to the "anti-theft" mode (31) from the "radio" mode (21) by the simultaneous operation of at least two keys (T1, T2) of the keys (Ti). |
