Patent ID: 7419274

Claim:
An optical conduction unit, comprising: an optical conduction body; a reflector; wherein said optical conduction body includes a light incidence surface for receiving light from a light source, a light outgoing surface extending in the prescribed x direction to cause the light that propagated from said light incidence surface inside the optical conduction body to go out to the outside, and a pair of side surfaces joined to the light outgoing surface and extending in the x direction; wherein said reflector includes a first member and a second member for sandwiching said optical conduction body in the y direction perpendicular to the x direction and for covering said pair of side surfaces; wherein said first member comprises first fitting means for mating with a portion of said optical conduction body in the y direction, second fitting means for mating with another portion of said optical conduction body in the x direction, third fitting means for mating with a portion of said second member in the y direction, and fourth fitting means for mating with another portion of said second member in the x direction; wherein said optical conduction body further includes a main region having said light outgoing surface and said pair of side surfaces and an auxiliary region joined in the x direction to the main region; wherein said auxiliary region includes said light incidence surface and a light reflecting surface for reflecting the light that propagated from said light incidence surface inside the auxiliary region toward said main region and is configured so that the light that propagated from said auxiliary region inside said main region goes out to the outside from said light outgoing surface, while propagating in the x direction; wherein said first member further comprises a body section adjacent to said optical conduction body and extending in the x direction and a first wall section and a second wall section protruding in the y direction from the body section and facing each other via a gap; and wherein said first fitting means comprises said first and second wall sections and has said auxiliary region inserted between the first and second wall sections.