| 摘要 |
PURPOSE:To eliminate the loss of a slave device when both the slave device and a master device are not used and to know the positions of both devices by storing the slave device into the master device in regard of an information transmitter which transmits the information between the master and slave devices. CONSTITUTION:A master device 1 set at the side of a person, e.g. a baby who needs the help and the supervision of other persons. Meanwhile a slave device 2 is put in a pocket of the clothes of the baby's mother, for example, and carried with her. The device 1 consists of a main body 1a, a cover 3 which can be freely attached to and detached from the body 1a, a communication antenna 4, and a storing part 5 where the device 3 is stored. Thus the device 2 stored in the part 5 can be easily taken out. The cover 3 is not closed if the mother stores the device 2 in a wrong way so that the mother is aware of her mistake. Mother knows the reverse storage state. Furthermore the device 2 has such a size that can be put in the pocket together with the antenna 4 and also contains a charging battery for improvement of the handling performance. In such a constitution, the information can be surely and quickly sent to the device 1 from the device 2. |
