| 摘要 |
The invention concerns a horn comprising a housing (1) wherein, the central part of the membrane (3) is integral with a solenoid plunger (7) arranged in the air gap of a coil (5). A Hall effect sensor (8) is maintained between a lower polar component (9) integral with the housing (1) and an upper polar component (10) opposite the solenoid plunger (7). An electronic circuit associated with the sensor (8) controls the powering of the coil (5). When the air gap (14) between the solenoid plunger (7) and the polar component (10) decreases, the magnetic flux through the sensor (8) increases, and for a detected flux value, the electronic circuit interrupts the current in the coil (5). The inventive breaker which operates without movement eliminates wear.
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