ANTENNA DEVICE AND CONTAINER BOX FOR ELECTRIC DEVICE

摘要

Condensation water occurring within a container box (300) is discharged to the outside thereof, thereby keeping the inside of the container box (300) at a low humidity with no condensation water therein. The container box contains an electric circuit (210) therein and is sealed. The container box comprises: a minute discharge aperture (322) formed at a lowermost part of the container box (300); and a discharge valve (330), the discharge valve (330) being a check valve for closing the discharge aperture (322). Only when the an internal pressure of the container box (300) becomes higher than an external pressure thereof by a predetermined value or greater, does the discharge valve (330) opens to discharge the liquid present inside of the container box (300). The discharge valve closes to keep the airtightness of the container box (300) at all other times.

主权项

1. An antenna device comprising:
an antenna unit that transmits and receives a radio wave; and a transmitting receiving unit that performs at least receiving processing and transmitting processing of the radio wave, wherein the transmitting receiving unit comprises: an electric circuit; and a container box that contains the electric circuit therein and is sealed to protect the electric circuit from an external environment, the container box comprising: a minute discharge aperture formed at a lowermost part of the container box; and a discharge valve, the discharge valve being a check valve for closing the discharge aperture, the discharge valve opens to discharge liquid present inside of the container box via the discharge aperture only when an internal pressure of the container box becomes higher than an external pressure thereof by a predetermined value or greater, and the discharge valve closes to keep airtightness of the container box at all other times.