| 摘要 |
The invention refers to an antitheft electronic device to protect bags and hand luggages in crowd. The electric impulse (1) applied to the electronic commutator and to the timer (2) generates an electric current. In the circuit (3) is produced mass (zero) tension that switches-on the audiofrequency (4), the audiofrequency amplifier and the sound diffuser (5). The delay of 7 seconds to switch-on the acoustic signal caused by the timer circuit, permits to act on the sensor inside the luggage that switches-off the alarm and the led. In the same way this sensor switches-off the alarm caused by the cutting of the luggage sides. At the contact with the switching on sensor, the led is lightened immediately and the alarm is activated after 7 seconds. If in this pause the fastening means are closed, the inserting procedure of the alarm is switched-off. |
