| 摘要 |
<p>PURPOSE:To provide a car casing which can issue an alarm when a pass, a ticket, a prepaid card or the like is left without being returned. CONSTITUTION:A through hole like pocket 2 is formed in the outer surface of a substrate 1 which is provided therein with a light sensor 5 for delivering a light receiving signal when a card (a) is pulled out from the pocket 2, and an alarm generator for issuing alarm in response to the signal from the sensor 5.</p> |
