| 摘要 |
A switch operated re-positioning reminder for a cellular phone is equipped with a time counter which can actuate an alarm device after a preset time is counted down. The magnet operated reed-in-tube switch is made up of a pair of partially overlapped but separated reeds in a tube, or other types of switch. The time counter is a simple CPU contained program and a user can set up the prolonged time span as desired for the time counter. The alarm is a buzz, ring or speaker that can produce alarm sound. In a first embodiment, a PC board including the magnet operated reed-in-tube switch, the CPU, the buzzer and a battery can be housed in a rather thin shelter case wherein a magnet is attached to a cellular phone or other precious articles and the shelter box is fixed to the interior of a cellular phone case. In other embodiment, the magnet is fixed to a proper position of a cellular phone case, and the time counter program is merged with a conventional cellular phone circuit and the original ring system for the cellular phone is adopted as an alarm whereby as long as a cellular phone in either case is not repositioned in a cellular phone case in a preset time, the alarm device in either the shelter box or the cellular phone will be actuated to alarm so as to remind a user not to leave his or her cellular phone behind.
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