Lamp unit for vehicles

A lamp unit for vehicles of projector type using a semiconductor light source as a light source, comprising,

• a reflector having ellipse reflect surface,
• a semiconductor light source arranged in such a way that its light emitting part is positioned at the first focus of the ellipse reflect surface,
• a projection lens with its lens light axis in the horizontal direction for projecting a predetermined distributed light pattern toward the predetermined direction,
• a planar reflect surface arranged between the projection lens and its focus in such a way that the planar reflect surface intersects the light axis of the projection lens and reflects the predetermined distributed light pattern toward one side of the projection lens,
• a light shutout member arranged between the semiconductor light source and the projection lens for shutting out the straight light from the semiconductor light source from illuminating toward the projection lens,
• a shade arranged between the second focus of the ellipse reflect surface and the semiconductor light source, for cutting off a portion of the reflected light emitting from the semiconductor light source and reflected by the ellipse reflect surface, and using the remaining reflected light to form a predetermined distributed light pattern having cutoff lines,
• the focus of the projection lens exists as a fictitious focus at the symmetrical position with respect to the planar reflect surface by way of the planar reflect surface,
• the fictitious focus is positioned at the second focus of the ellipse reflect surface,
• the lens light axis exists as a fictitious lens light axis intersecting the lens light axis orthogonally by way of the planar reflect surface,
• the fictitious lens light axis is consistent with the light axis of the ellipse reflect surface,
• a supplemental reflect surface arranged on the light shutout member for reflecting the light from the semiconductor light source toward the side of the shade,
• a through hole arranged on the shade for the reflected light from the supplemental reflect surface illuminating therethrough and toward the planar reflect surface.