| 摘要 |
PROBLEM TO BE SOLVED: To provide an electronic cassette that secures a reduced weight of a casing and thinness thereof, and has a counter-measurement taken against a drop in charge efficiency and heat radiation of a power receiving unit in the electronic cassette employing a contactless charge method of using a wireless power feeder.SOLUTION: A battery and a power receiving unit 54 receiving a power for charging the battery is accommodated in a casing 32 of an electronic cassette 21. The casing 32 is formed of a conductive material, and has an opening part 74 formed at a position facing the power receiving unit 54. When the electronic cassette 21 is set to a wireless power feeder 81, the opening part 74 faces a power transmission window 83, and is located in a transmission passage of electricity E. A cover part 76 covers the opening part 74 to thereby prevent intrusion of dust or the like. Further, the cover part 76 has insulation property and thermal conductivity, and radiates heat HT of the power receiving unit 54. Since the conductive material is not disposed in the transmission passage of the electricity E, a drop in charge efficiency does not occur. |
