Patent attributes
A magnetic anti-theft device, includes: a control circuit, in connection with a plurality of magnetic sensors and a control unit; the plurality of magnetic sensors, allowing different magnetic induction strengths to be preset; and an unlock piece, configured with a plurality of magnetic elements corresponding to the magnetic induction strengths of the plurality of magnetic sensors, whereby, when the correct unlock piece is placed on the magnetic sensors, the plurality of magnetic sensors will induct correct magnetic forces, the control unit is driven to release a monitoring state after interpretation of the control circuit; if the induction is incorrect, the control unit is driven to form a warning action after the interpretation of the control circuit so as to achieve an anti-theft effect and increase safety effectively probably because the magnetic force of the magnetic element of the unlock piece is too small or too large.
