An FPC compartment 29 in a left rim 5 is slit-shaped. A left FPC positioning member 36 supports an FPC 24 in the FPC compartment 29 such that a main surface of the FPC 24 extends substantially horizontally. The FPC 24 supported in the FPC compartment 29 is twisted by substantially 90° at an entrance to a left hinge 8. The FPC 24 extends around a hinge pin 8C and is received in a left electronic-component compartment 16. The FPC 24 is held in the left electronic-component compartment 16 such that the main surface of the FPC 24 extends substantially vertically. A left end piece 34 located adjacent to the left hinge 8 has a left cavity 35 accommodating a left deformable bend 24C of the FPC 24.
