| 摘要 |
PROBLEM TO BE SOLVED: To allow the device to surely inform the arrival of a call to a carrying person of a portable telephone set even without making the portable telephone set small. SOLUTION: In this device, a transmission section 13 is placed in a portable telephone set 11 and an alarm section 16 is inserted to an ear 20 of a carrying person. When a telephone circuit 12 detects the arrival of a call, the transmission section 13 sends a request signal in a very weak radio wave to space via an antenna 15. The alarm section 16 is configured to be independent of the portable telephone set 11 and provides an output of a call signal by means of an electronic buzzer in the vicinity of an ear hole 22. Even when the portable telephone set 11 is contained in a bag or a call tone signal is set to a very weak tone volume so as not to be perceived by surrounding persons, the carrying person does not miss the arrival of a call. |
