| 摘要 |
PROBLEM TO BE SOLVED: To provide a headset that can satisfy characteristics of a built-in antenna without influencing external dimensions of an enclosure and a product price.SOLUTION: A headset 1 includes: a circuit board 7 which is made of dielectric material, and on which a first circuit pattern 20 is formed and electronic parts 8, 8a are implemented, forming a radio communication device part 21; an antenna part 28 including an antenna pattern formed on the circuit board 7; a battery 11; a body housing 4 for housing the circuit board 7 and the battery 11; and an operation switch 14 about which a switch knob 12 is placed on the front surface of the body housing 4 and a conical coil spring 13 is provided to return the switch knob 12 to its original position when the switch knob 12 is operated. The coil spring 13 has conductivity and always keeps in contact with the antenna pattern 26, and thereby the coil spring 13 is used as an antenna. |
