| 摘要 |
<p>The invention relates to an alarm device for vehicles, comprising a first sensor (1; 1') for detecting the presence of living beings in the vehicle, and a second sensor (4; 4') for detecting that the user of the vehicle has left the vehicle, which sensors (1, 4; 1', 4') are connected to an alarm control unit (2, 2') arranged to activate an alarm depending on signals from the sensors (1, 4; 1', 4'), and comprising a delay unit (2, 5; 2') arranged to initiate a time delay (t1, t2; t3), when receiving a signal from said second sensor (4; 4'), during which time limit said alarm is not activated, after which the alarm enters an active state. The invention is characterized in that the first sensor (1; 1') is connected to means (2, 5; 2') for extending said time delay (t1, t2; t3) when receiving a signal from said first sensor (1; 1'). By means of the invention, an improved alarm device is obtained, by means of an alarm cannot be triggered unintentionally, if for example a pet or a child has been left in the vehicle subsequent to the driver having left the vehicle.</p> |
