Abstract: An oscillating member 55 is designed so that the other end side 58 is pressed by an inserted-side end portion 12 of a storage device 1 to oscillate one end side 57 toward the storage device 1 with the insertion of the storage device 1 into a frame 3. Since the other end portion 42 of a spring connector 4 always resiliently contacts a circuit terminal portion 20 by the function of a coil spring 44 regardless of the movement of the spring connector 4 toward the storage device 1, a terminal portion 10 of the storage device 1 is electrically connected to a circuit terminal portion 20 by the conductive spring connector 4. Thus, the terminal portions 10 of the storage device 1 and the spring connector 4 hardly rub against each other to establish the electrical connection between the terminal portion 10 of the storage device 1 and the circuit terminal portion 20.

Abstract: Conductive tongues project from two places on the axial direction tip of a first antenna element, which projects outwardly from the case of a radio device. When a second antenna element, freely movable in the axial direction, is extracted, the two conductive tongues conductively connect to the base of the second antenna element, and are mutually short-circuited.

Abstract: A conductor is provided from a base to a first fold point at the tip side, and sequentially folded parallel not less than once at the tip side and the base side, forming a first element; the conductor is split at the first fold point and the split conductor is, similarly, sequentially folded parallel not less than once at the tip side and the base side, forming a second element. Then, the effective length from the base to the tip of the first element is set to a quarter of the wavelength of a first frequency, and the effective length from the base to the tip of the second element is set to a quarter of the wavelength of a second frequency.

Abstract: A plurality of insulators are disposed in holes, respectively, defined in a metal plate of a waveguide of a circularly-polarized-wave flat antenna. Each insulator has a through-hole and a protrusion. The through-hole extends from the outside of the metal plate to the inside of the waveguide. The protrusion protrudes outward beyond the metal plate. The protrusion has a groove which is open to the outside. Curl antenna elements each have a shaft portion, an arm portion, and a curl portion. The shaft portion is fitted in the through-hole of the insulator and partly protrudes outward from the metal plate. The arm portion extends from the protruded end of the shaft portion. The curl portion is in a substantially helical shape and connected to the top of the arm portion.