| 摘要 |
PROBLEM TO BE SOLVED: To clearly indicate the arrival of an incoming call of a radio telephone set or the like by means of visual, audible and tactile senses. SOLUTION: The device has an oscillation circuit 12 that generates a current of a low frequency by a signal received from an antenna 11, an inverter 15 that drives alternately a plurality of coil drivers 141 ... connecting with a coil 13 to supply currents in different directions alternately, the coil 13 driven by the invertor 15 and a magnetic body 16 placed in a magnetic field produced by the excitation of the coil 13. The alternate vibration of the magnetic body 16 is visually observed and its vibration sound is heard to notice the arrival of an incoming call. |
