(57) The vibrator 12 is driven by the output voltage VB of the power supply 14 using dry batteries or the like at the starting of a paging
announcement and is driven by the constant voltage circuit having the output voltage
VS and using the power supply 14 as its power source after the starting. Detecting the
paging announcement, the decoder 3 feeds the drive signal C1 to the vibrator controller
11, and the vibrator controller 11 starts the vibrator by the voltage VB from the power supply 14. When a predetermined time passes from the start, the decoder
3 sends out the control signal C2 to the vibrator controller 11, and switches the
drive voltage for the vibrator to the output voltage VS from the constant voltage circuit 13. When the paging announcement finishes the decoder
3 stops sending out the drive signal C1, and the vibrator controller 11 stops the
power supply to the vibrator 12.
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