Vehicle headlights

Abstract

A vehicle headlight (1) comprises: a first light-emitting optical system (LE1) for emitting first light (L1) that forms a low beam light distribution pattern (PL); a second light-emitting optical system (LE2) for emitting second light (L2) that forms, together with by means of the first light (L1), a high beam light distribution pattern (PH); a projection lens (35); and a beam shaper (50) that is formed from a plate-like member. The beam shaper (50) has a thick part (151) having a constant thickness and a thin part (152) having a thickness less than the thickness of the thick part (151). The thick part (151) includes the rear end of the beam shaper (50). The thin part (152) includes the front end of the beam shaper (50), and is connected to the front end (151e1) of the thick part (151). A portion of the first light (L1) is reflected by an upper surface (152S1) of the thin part (152) toward the projection lens (35) such that a cutoff line (CL) of the low beam light distribution pattern (PL) is formed.

Claims

1. A first light-emitting optical system that emits a first light, which forms the light distribution pattern of the low beam, from a first part toward the front, A second light-emitting optical system emits a second light forward from a second part located below the first part, which together with the first light forms a high beam light distribution pattern. A projection lens positioned in front of the first and second parts, through which the first light and the second light are transmitted, A beam shaper consisting of a plate-shaped member disposed between the first portion and the second portion and the projection lens, A holder for holding the beam shaper, Equipped with, The beam shaper has a thick section with a constant thickness and a thin section with a thickness thinner than the thickness of the thick section. The aforementioned thickened portion includes the rear end of the beam shaper, The thin portion includes the front end of the beam shaper and is connected to the front end of the thick portion. The upper surface of the thin portion reflects a portion of the first light toward the projection lens so as to form a cutoff line for the light distribution pattern of the low beam. The portions to the left and right of the thin-walled section of the beam shaper are fixed to the holder. A vehicle headlight characterized by the following features.

2. A first light-emitting optical system that emits a first light, which forms the light distribution pattern of the low beam, from a first part toward the front, A second light-emitting optical system emits a second light forward from a second part located below the first part, which together with the first light forms a high beam light distribution pattern. A projection lens positioned in front of the first and second parts, through which the first light and the second light are transmitted, A beam shaper consisting of a plate-shaped member disposed between the first portion and the second portion and the projection lens, Equipped with, The beam shaper has a thick section with a constant thickness and a thin section with a thickness thinner than the thickness of the thick section. The aforementioned thickened portion includes the rear end of the beam shaper, The thin portion includes the front end of the beam shaper and is connected to the front end of the thick portion. The upper surface of the thin portion reflects a portion of the first light toward the projection lens so as to form a cutoff line for the light distribution pattern of the low beam. The thickness of the aforementioned thin section gradually decreases towards the front. A vehicle headlight characterized by the following features.

3. A first light-emitting optical system that emits a first light, which forms the light distribution pattern of the low beam, from a first part toward the front, A second light-emitting optical system emits a second light forward from a second part located below the first part, which together with the first light forms a high beam light distribution pattern. A projection lens positioned in front of the first and second parts, through which the first light and the second light are transmitted, A beam shaper consisting of a plate-shaped member disposed between the first portion and the second portion and the projection lens, Equipped with, The beam shaper has a thick section with a constant thickness and a thin section with a thickness thinner than the thickness of the thick section. The aforementioned thickened portion includes the rear end of the beam shaper, The thin portion includes the front end of the beam shaper and is connected to the front end of the thick portion. The upper surface of the thin portion reflects a portion of the first light toward the projection lens so as to form a cutoff line for the light distribution pattern of the low beam. The thin portion has a stepped portion that extends from the front end to the rear end of the thin portion. A vehicle headlight characterized by the following features.

4. At least one of the pair of the region on the upper surface of the thin portion on one side of the step portion and the upper surface of the thick portion, and the pair of the region on the lower surface of the thin portion on the other side of the step portion and the lower surface of the thick portion, is located on the same plane. The vehicle headlight according to feature 3.

5. A first light-emitting optical system that emits a first light, which forms the light distribution pattern of the low beam, from a first part toward the front, A second light-emitting optical system emits a second light forward from a second part located below the first part, which together with the first light forms a high beam light distribution pattern. A projection lens positioned in front of the first and second parts, through which the first light and the second light are transmitted, A beam shaper consisting of a plate-shaped member disposed between the first portion and the second portion and the projection lens, Equipped with, The beam shaper has a thick section with a constant thickness and a thin section with a thickness thinner than the thickness of the thick section. The aforementioned thickened portion includes the rear end of the beam shaper, The thin portion includes the front end of the beam shaper and is connected to the front end of the thick portion. The upper surface of the thin portion reflects a portion of the first light toward the projection lens so as to form a cutoff line for the light distribution pattern of the low beam. The front end of the thin portion is located between a pair of planes that run along the upper and lower surfaces of the thick portion, respectively. A vehicle headlight characterized by the following features.

6. The upper surface of the thickened portion reflects the remaining portion of the first light toward the projection lens. A vehicle headlight according to any one of claims 1 to 5.

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