| 摘要 |
<p>PURPOSE:To enhance the transmission efficiency of an electric signal and to prevent the electric signal from being leaked by exposing an end face of a core in a coil to one major side and a rear side of the electronic card device and allowing the exposed end faces to form a closed magnetic circuit with a corresponding outer core when the electronic card device is inserted to an electronic device. CONSTITUTION:A printed circuit board 4 with electronic components 8 mounted thereon is arranged in the inside of a card main body 1, plural holes are penetrated through the card main body 1 from one major side to its rear side together with the printed circuit board 4 and internal cores 2, 2', 2'' are packed in the holes. The end faces of the internal cores 2, 2', 2'' are exposed to the major side and the rear side. When the electronic card device is inserted to an electronic device, the internal cores 2, 2', 2'' are in close contact with outer cores 3, 3', 3'' arranged in the electronic device to form a closed magnetic circuit. Internal coils 7, 7', 7'' and outer coils are formed to the inner printed circuit board 4 and an outer printed circuit board 5 and connect to the electronic components 6 and the internal circuit of the electronic device.</p> |
