Abstract: A mobile electronic apparatus has a display side housing with a bearing unit at one end, a dummy hinge with a rotary unit mounted in the bearing unit at one end and a joint unit at the other end, and a key side housing joined to the joint unit at one end. The housings are turnably connected to one another via the dummy hinge. A key side housing has a vertically extending boss unit. A joint unit has an insertion hole into which the boss unit is inserted. The insertion hole has a fitting hole, in which the boss unit is fitted when the joint unit and the key side housing are joined to one another, and a diameter-expanding hole in communication with the fitting hole and expanded in a rotational direction of the rotary unit toward the key side housing.

Abstract: A mobile electronic apparatus has a display side housing with a bearing unit at one end, a dummy hinge with a rotary unit mounted in the bearing unit at one end and a joint unit at the other end, and a key side housing joined to the joint unit at one end. The housings are turnably connected to one another via the dummy hinge. A key side housing has a vertically extending boss unit. A joint unit has an insertion hole into which the boss unit is inserted. The insertion hole has a fitting hole, in which the boss unit is fitted when the joint unit and the key side housing are joined to one another, and a diameter-expanding hole in communication with the fitting hole and expanded in a rotational direction of the rotary unit toward the key side housing.

Abstract: A wireless communication terminal device has a circuit board with a plurality of electronic components arranged thereon and a conductive shielding case attached to the circuit board so that the shielding case covers the plurality of electronic components. At least one of the electronic components is an antenna. A surface shape of the shielding case is formed in a shape not overlapping the antenna. A non-conductive cover is provided at a position on the circuit board corresponding to an area not overlapping the antenna in the surface shape of the shielding case.