JP2012134174A - Vehicular lamp unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular lamp unit of which a semiconductor light source is not visually recognized from outside, even when its projection lens is arranged as if the same is floating in the air.SOLUTION: The vehicular lamp unit includes a semiconductor light source 10, a first reflector 20 covering the semiconductor light source, a second reflector 50 with reflecting faces arranged on both sides of the semiconductor light source, a projection lens 40 arranged at a front side of an aperture 21 of the first reflector which projects light that passes through the aperture of the first reflector out of all the light generated by the semiconductor light source. The reflector surface 22 of the first reflector reflects light that does not pass through the aperture of the first reflector out of all the light generated by the semiconductor light source, towards a reflector surface 51 of the second reflector. The reflector surface of the second reflector is arranged to reflect to the front side the light reflected by the reflector surface of the first reflector. The projection lens is fixed to the unit by the use of lens-mounting legs of a transparent or translucent material leaving some space from an outside surface 23.

Description

  The present invention relates to a vehicular lamp unit, and more particularly to a vehicular lamp unit that includes a projection lens arranged as if it floats hollow.

  2. Description of the Related Art Conventionally, a direct projection type vehicular lamp is known in which light from an LED, which is a semiconductor light source, is directly incident on a projection lens without being reflected by a reflector and is projected (for example, Patent Document 1).

  As shown in FIG. 11, the vehicular lamp described in Patent Document 1 includes an LED 10 ′ that is a semiconductor light source, a projection lens 20 ′ disposed in front of the light emitting surface 10 a ′ of the LED 10 ′, and the LED 10 ′ and the projection lens. The shade 30 'is disposed between 20' and a part of the light emitted from the LED 10 'is blocked by the shade 30', and then enters the projection lens 20 'and is projected forward. It has become.

  In recent years, a vehicle lamp having a new design has been demanded from the viewpoint of increasing the degree of freedom in vehicle design. As this newly designed vehicular lamp, for example, it is conceivable to arrange the projection lens of a direct projection type vehicular lamp described in Patent Document 1 as if it is floating in the air.

JP 2004-95479 A

  However, in this type of direct projection type vehicular lamp, when the projection lens is arranged as if it is floating in the air, the semiconductor light source is visually recognized from the outside through the distance between the projection lens and the semiconductor light source, There is a problem that it is not preferable.

  Further, in this type of direct projection type vehicular lamp, only a part of the light emitted from the semiconductor light source is incident on the projection lens, so that there is a problem that the light use efficiency is not good.

  The present invention has been made in view of such circumstances, and a newly designed vehicular lamp unit in which a semiconductor light source is not visually recognized from the outside even if the projection lens is arranged as if it is floating in the air. The purpose is to provide.

  It is another object of the present invention to provide a vehicular lamp unit that can effectively use light that does not enter a projection lens among light emitted from a semiconductor light source.

In order to solve the above-mentioned problem, the invention according to claim 1 is a vehicular lamp unit mounted on a vehicle, having a semiconductor light source and a reflecting surface for reflecting light emitted from the semiconductor light source, The reflective surface is disposed in front of the light emitting surface of the semiconductor light source with the light emitting surface of the semiconductor light source facing the light source, and an opening for allowing the light emitted by the semiconductor light source to pass through is formed at a position on the lamp optical axis. And the 1st reflector which covers the semiconductor light source, the 2nd reflector which has the reflective surface arrange | positioned at each side of the semiconductor light source, and the position which does not contact the 1st reflector ahead of the opening of the 1st reflector And a first projection lens that projects forward the light that has passed through the opening of the first reflector out of the light emitted by the semiconductor light source, The reflecting surface of the reflector is configured to reflect light that does not pass through the opening of the first reflector among the light emitted by the semiconductor light source toward the reflecting surface of the second reflector, and The reflecting surface of the reflector is configured to reflect the light reflected by the reflecting surface of the first reflector out of the light emitted from the semiconductor light source, and the first reflector has a concave inner side. It is made of a synthetic resin provided with the reflecting surface consisting of a reflecting surface and an outer surface opposite to the reflecting surface, and the opening penetrates from the inner reflecting surface to the outer surface, and is smaller in size than the projection lens. Has been
The first projection lens is fixed at a distance from the outer surface by a projection lens mounting leg made of a transparent or translucent material.

  According to the first aspect of the present invention, since the semiconductor light source is covered with the first reflector, even if the projection lens is arranged at a position not in contact with the first reflector in front of the opening of the first reflector (that is, the projection). Even if the lens is arranged as if it is floating in the air), the semiconductor light source is not visually recognized from the outside (or hardly visible). In addition, since the first projection lens is fixed by being separated from the outer surface by a projection lens mounting leg made of a transparent or translucent material, the projection lens can be viewed as if it is floating in the air. Can do. That is, according to the first aspect of the present invention, there is provided a vehicle lamp unit of a new design in which the projection lens is arranged as if it is floating in the hollow and the semiconductor light source is not visually recognized from the outside. Is possible.

  According to the first aspect of the present invention, the light that does not pass through the opening of the first reflector (that is, the light emitted from the semiconductor light source that does not enter the projection lens) is reflected on the reflecting surface of the first reflector and the first reflector. Since the light is reflected forward by the reflecting surface of the two reflectors, it is possible to effectively use light that does not enter the projection lens among light emitted from the semiconductor light source.

  According to the first aspect of the present invention, the first reflector that covers the semiconductor light source is formed with an opening for allowing the light emitted by the semiconductor light source to pass through, so that heat is generated as the semiconductor light source emits light. However, it is possible to dissipate heat from this opening.

  Furthermore, according to the first aspect of the present invention, the projection lens is arranged at a position not in contact with the first reflector in front of the opening of the first reflector, so that it is hardly affected by the heat generated by the light emission of the semiconductor light source. Therefore, a desired light distribution pattern can be obtained.

  According to a second aspect of the present invention, in the first aspect of the present invention, the first projection lens has a shape obtained by cutting up, down, left, and right of a convex lens.

  The invention described in claim 2 exemplifies the shape of the first projection lens.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the opening of the first reflector can pass only the light incident on the entire surface of the first projection lens among the light emitted from the semiconductor light source. It is characterized by being set to various shapes and sizes.

  According to the invention described in claim 3, the opening of the first reflector is set to a shape and size that allows only the light incident on the entire surface of the projection lens among the light emitted from the semiconductor light source to pass through the opening. The light that does not enter (that is, the light emitted from the semiconductor light source that does not enter the entire projection lens) is reflected forward by the reflecting surface of the first reflector and the reflecting surface of the second reflector, so that the semiconductor light source emits light. It is possible to use the light effectively.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the projection lens mounting leg is fixed to one end to which the first projection lens is fixed and to the first reflector side. The first projection lens is fixed to the first reflector side by fixing the other end of the projection lens mounting leg to the front side of the opening of the first reflector and to the first reflector. It arrange | positions in the position which does not contact, It is characterized by the above-mentioned.

  According to invention of Claim 4, it becomes possible to arrange | position a 1st projection lens very easily in the position which does not contact the 1st reflector ahead of the opening of a 1st reflector with a projection lens mounting leg. .

  According to the fourth aspect of the present invention, the opening of the first reflector can be adjusted by adjusting the length of the projection lens mounting leg along the optical axis direction even in the first projection lens having a different focal length. It becomes possible to arrange | position in the predetermined position which does not contact the 1st reflector ahead.

  The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the reflection surface of the first reflector is a pair of elliptical reflection surfaces arranged adjacent to each other. The reflecting surface of the second reflector is a parabolic reflecting surface disposed on each side of the semiconductor light source, and the first focal point of the one elliptical reflecting surface is set at or near the semiconductor light source. And the second focal point is set at or near the focal point of the one parabolic reflecting surface, and the other elliptical reflecting surface is set at the first focal point at or near the semiconductor light source, In addition, the second focal point is set at or near the focal point of the other parabolic reflecting surface.

  The invention according to claim 5 exemplifies the reflecting surfaces of the first and second reflectors.

  The invention according to claim 6 is the semiconductor light source according to claim 5, wherein the semiconductor light source is reflected by the first reflector between the one elliptical reflecting surface and the one parabolic reflecting surface. A first light-shielding shutter that shields a part of the light from the first light-shielding shutter is disposed at or near the upper edge of the first light-shielding shutter, Between the other elliptical reflective surface and the other parabolic reflective surface, a second light shielding shutter that shields part of the light from the semiconductor light source reflected by the first reflector is disposed, The focal point of the other parabolic reflecting surface is set at or near the upper edge of the second light-shielding shutter.

  According to the sixth aspect of the present invention, it is possible to form a light distribution pattern having a cut-off pattern of a passing beam by the first and second light shielding shutters.

  The invention according to claim 7 is the invention according to any one of claims 1 to 4, wherein the reflection surface of the first reflector is a pair of elliptical reflection surfaces arranged adjacent to each other, The reflection surface of the second reflector is a flat reflection surface disposed on each side of the semiconductor light source, and further includes a second projection lens disposed in front of each of the reflection surfaces of the plane, and the one ellipse The system reflecting surface has a first focal point set at or near the semiconductor light source, and a second focal point set at or near the focal point of the second projection lens disposed in front of the reflecting surface on the one plane. The other elliptical reflective surface is a second projection lens in which a first focal point is set at or near the semiconductor light source and a second focal point is disposed in front of the reflective surface on the other plane. Set at or near the focal point Characterized in that it is.

  The invention described in claim 7 exemplifies the reflecting surfaces of the first and second reflectors.

  The invention according to claim 8 is the invention according to claim 7, wherein the semiconductor light source reflected by the first reflector is between the one elliptical reflective surface and the one reflective surface. A first light-shielding shutter that shields part of the light is disposed, and the light from the semiconductor light source reflected by the first reflector is disposed between the other elliptical reflective surface and the reflective surface of the other flat surface. A second light shielding shutter that shields a part of the light is disposed.

  According to the eighth aspect of the present invention, it is possible to form a light distribution pattern having a cut-off pattern of a passing beam by the first and second light shielding shutters.

  The invention according to claim 9 is the invention according to claim 7 or 8, wherein the reflection surface of the first reflector is a pair of elliptical reflection surfaces arranged adjacent to the left and right, and the second reflector. The reflective surfaces are planar reflective surfaces disposed on both the left and right sides of the semiconductor light source, the one elliptical reflective surface is disposed on the right side, and the one planar reflective surface is disposed on the left side. The other ellipsoidal reflecting surface is disposed on the left side, and the other planar reflecting surface is disposed on the right side.

  The invention according to claim 9 exemplifies the arrangement of the reflecting surfaces of the first and second reflectors. Therefore, for example, the reflective surface of the first reflector is a pair of elliptical reflective surfaces disposed adjacent to each other in the vertical direction, and the reflective surfaces of the second reflector are disposed on both the upper and lower sides of the semiconductor light source. The one elliptical reflective surface is disposed on the upper side, the one planar reflective surface is disposed on the lower side, and the other elliptical reflective surface is disposed on the lower surface. The other parabolic reflecting surface may be arranged on the upper side.

  A tenth aspect of the invention includes a plurality of vehicle lamp units according to any one of the first to ninth aspects, and the focal lengths of the first projection lenses of the respective vehicle lamp units are different from each other. The optical axes of the respective vehicle lamp units are adjusted so that the light distribution patterns projected by the respective first projection lenses overlap.

  According to the invention described in claim 10, it is possible to form a light distribution pattern whose size and brightness change in a gradation.

  ADVANTAGE OF THE INVENTION According to this invention, even if it arrange | positions as if the projection lens was floating in the hollow, a semiconductor light source cannot be visually recognized from the outside (or it is hard to be visually recognized), and it is possible to provide a newly designed vehicle lamp unit. It becomes. Further, according to the present invention, it is possible to provide a vehicular lamp unit that can effectively use the light emitted from the semiconductor light source that does not enter the projection lens.

It is a perspective view of the vehicle lamp unit 100 of this embodiment. It is a disassembled perspective view of the vehicle lamp unit 100 shown in FIG. It is sectional drawing of the vehicle lamp unit 100 shown in FIG. 4 is a diagram for explaining a light shielding shutter 30. FIG. 4 is a diagram for explaining a light distribution pattern formed by light projected forward through the projection lens 40. FIG. It is a perspective view of the vehicle lamp unit 100 using the projection lens 40 (for example, F50mm) whose focal distance is shorter than the projection lens 40 shown in FIG. It is a perspective view of the vehicle lamp unit 100 (modification) using the lens plate 60 in which the projection lens 40 and the left and right diffusion lenses 61R and 61L are integrally formed instead of the projection lens 40. It is sectional drawing of the vehicle lamp unit 100 shown in FIG. FIG. 4 is a partially enlarged view of a vehicular lamp unit 100 (modified example) in which a first light reflector 20 is provided with a semiconductor light source 70 such as an LED that emits light that enters the projection lens mounting leg 41. It is sectional drawing of the vehicle lamp unit 100 (modified example) using the plane reflective surface instead of the paraboloid type reflective surface as reflective surfaces 51R and 51L of the 2nd reflector 50. FIG. It is a figure for demonstrating the conventional vehicle lamp.

  Hereinafter, a vehicle lamp unit according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a vehicular lamp unit according to the present embodiment. FIG. 2 is an exploded perspective view of the vehicle lamp unit shown in FIG. FIG. 3 is a cross-sectional view of the vehicle lamp unit shown in FIG.

  The vehicular lamp unit of the present embodiment is applied to a headlamp of a vehicle such as an automobile.

  As shown in FIGS. 1 to 3, the vehicular lamp unit 100 of the present embodiment includes a semiconductor light source 10, a first reflector 20 disposed in front of the light emitting surface 10 a of the semiconductor light source 10, the semiconductor light source 10 and the first reflector 20. The light shielding shutter 30 disposed between the projection lens 40, the projection lens 40 disposed at a position not in contact with the first reflector 20 in front of the opening 21 of the first reflector 20, and the reflecting surfaces 51 disposed on both sides of the semiconductor light source 10. The 2nd reflector 50 etc. which has are provided.

[Semiconductor light source 10]
The semiconductor light source 10 is one or a plurality of white or colored light emitting diodes. In this embodiment, for the purpose of forming a light distribution pattern extending in the horizontal direction, an LED in which four light emitting diode chips are arranged in the horizontal direction. Package is used. As shown in FIG. 2, the semiconductor light source 10 is mounted on a predetermined substrate 11, and the predetermined substrate 11 is screwed and fixed to the heat radiating member 12 with the light emitting surface 10 a of the semiconductor light source 10 facing forward. The heat radiating member 12 radiates heat generated by light emission of the semiconductor light source 10.

[First reflector 20]
As shown in FIGS. 2 and 3, the first reflector 20 is disposed in front of the light emitting surface 10 a of the semiconductor light source 10. The first reflector 20 is a substantially hemispherical reflector having a concave inner reflection surface 22 and a convex outer surface 23 on the opposite side, and the outer reflection surface 22 is directed forward and the inner reflection surface 22 is directed toward the front. The semiconductor light source 10 is fixed to the second reflector 50 with a screw so as to face the light emitting surface 10a (that is, the semiconductor light source 10 is covered so as not to be visually recognized from the outside). An opening 21 penetrating from the inner reflection surface 22 to the outer surface 23 is formed at a position on the optical axis AX of the first reflector 20, and light from the semiconductor light source 10 (light emitted from the semiconductor light source 10) is this. It passes through the opening 21. The opening 21 is set in a shape and a size that allow only the light incident on the entire surface of the projection lens 40 out of the light emitted from the semiconductor light source 10 (in this embodiment, the same rectangle as the shape of the projection lens 40) and the size. Light that does not pass through the opening 21 (that is, light that does not enter the entire projection lens 40 out of light emitted from the semiconductor light source 10) is reflected on the reflecting surfaces 22R and 22L of the first reflector 20 and the reflecting surfaces 51R and 51L of the second reflector 50. Is reflected forward. Therefore, the light emitted from the semiconductor light source 10 can be used effectively. The outer surface 23 of the first reflector 20 is plated, colored, cut or the like for decoration purposes.

  The first reflector 20 is integrally formed, for example, by injection molding a synthetic resin, and at least the inner reflection surface 22 is subjected to a mirror surface treatment such as aluminum deposition.

  The inner reflection surface 22 of the first reflector 20 transmits light that does not pass through the opening 21 among the light emitted from the semiconductor light source 10 to the reflection surfaces 51R and 51L of the second reflector 50 disposed on both sides of the semiconductor light source 10, respectively. For example, as shown in FIG. 3, elliptical reflecting surfaces 22 </ b> R and 22 </ b> L such as spheroids arranged adjacent to the left and right as shown in FIG. 3.

  In the right elliptical reflecting surface 22R in FIG. 3, the first focal point is set to the semiconductor light source 10 (or the vicinity thereof), and the second focal point is the left reflecting surface 51L of the second reflector 50 (in this embodiment, it is free of light). It is set to the focal point (or the vicinity thereof) of the object system reflecting surface 51L). Therefore, the right elliptical reflecting surface 22R collects the light emitted from the semiconductor light source 10 that does not pass through the opening 21 at the second focal point, and then the left reflecting surface 51L (parabolic) of the second reflector 50. The light is reflected toward the surface reflection surface 51L).

  Similarly, in FIG. 3, the left elliptical reflecting surface 22 </ b> L has a first focal point set to the semiconductor light source 10 (or its vicinity) and a second focal point to the right reflecting surface 51 </ b> R (parabolic) of the second reflector 50. It is set to the focal point (or the vicinity thereof) of the surface system reflection surface 51R). Accordingly, the left elliptical reflecting surface 22L condenses the light emitted from the semiconductor light source 10 that does not pass through the opening 21 at the second focal point, and then the right reflecting surface 51R (parabolic) of the second reflector 50. Reflected toward the surface-based reflecting surface 51R).

[Shading shutter 30]
As shown in FIG. 2, a light shielding shutter 30 is disposed between the semiconductor light source 10 and the first reflector 20. The focus of the projection lens 40 is set at the upper edge of the light shielding shutter 30 (or in the vicinity thereof, for example, slightly below the upper edge of the light shielding shutter 30). Accordingly, the light from the semiconductor light source 10 is partially shielded by the light shielding shutter 30, and then projected forward through the projection lens 40. For example, as shown in FIG. A light distribution pattern P1 (light distribution pattern for a passing beam) is formed.

  FIG. 4 is a diagram for explaining the light shielding shutter 30. As shown in FIGS. 4A to 4C, a direct acting actuator 31 is connected to the light shielding shutter 30. The direct acting actuator 31 moves the light shielding shutter 30 in a direction perpendicular to the optical axis AX of the semiconductor light source 10 (arrow X in FIG. 2) in response to a command input from the driver's seat of the vehicle on which the vehicle lamp unit 100 is mounted. −X ′ direction) and moved to a predetermined position (a right-side cut-off shutter position, a city-use cut-off shutter position, or a left-hand pass cut-off shutter position). Since the opening pattern 30a for forming a cut-off pattern is formed in the light-shielding shutter 30, it is possible to form a light distribution pattern having a different cut-off pattern by positioning the light-shielding shutter 30 at different positions. It has become.

[Projection lens 40]
As shown in FIGS. 1 to 3, a projection lens 40 is disposed in front of the opening 21 of the first reflector 20. The projection lens 40 is a lens for projecting forward the light that has passed through the opening 21 of the first reflector 20 among the light emitted from the semiconductor light source 10, and in this embodiment, the top, bottom, left, and right of the convex lens are cut. A lens having a substantially rectangular shape in front view is used. The projection lens 40 may be a lens having another shape such as a convex lens such as an aspheric lens.

  The projection lens 40 is positioned so as not to contact the first reflector 20 in front of the opening 21 of the first reflector 20 by screwing and fixing the projection lens mounting leg 41 integrally formed with the projection lens 40 to the first reflector 20. (Ie, the projection lens is arranged as if it is floating in the air). Further, the projection lens 40 and the projection lens mounting leg 41 are integrally formed by injection molding a transparent or translucent material such as acrylic or polycarbonate. Further, the first reflector 20 covers the semiconductor light source 10 to create a dark portion. For this reason, as shown in FIG. 1, the projection lens 40 is visually recognized as if it is floating in a hollow state.

  The projection lens mounting leg 41 includes one end 41a to which the projection lens 40 is fixed and the other end 41b to be fixed to the first reflector 20 with screws. This projection lens mounting leg 41 makes it possible to arrange the projection lens 40 very easily in front of the opening 21 of the first reflector 20 and at a position where it does not contact the first reflector 20.

  The length of the projection lens mounting leg 41 along the optical axis AX direction is such that the focus of the projection lens 40 (for example, F70 mm) is slightly lower than the upper edge of the light shielding shutter 30 (or the vicinity thereof, for example, the upper edge of the light shielding shutter 30). ). The light emitted from the semiconductor light source 10 is partially blocked by the light blocking shutter 30, passes through the opening 21 of the first reflector 20, and is projected forward through the projection lens 40. For example, the cut-off pattern shown in FIG. Is formed. FIG. 5 is a diagram for explaining a light distribution pattern formed by light projected forward through the projection lens 40.

  Note that, by adjusting the length of the projection lens mounting leg 41 along the optical axis AX direction, the projection lens 40 having different focal lengths can be positioned in front of the opening 21 of the first reflector 20 and the first reflector 20. It is possible to arrange at a predetermined position that does not touch the surface.

  FIG. 6 is a perspective view of the vehicular lamp unit 100 using the projection lens 40 (for example, F50 mm) having a shorter focal length than the projection lens 40 shown in FIG.

  For example, a plurality of vehicular lamp units 100 having projection lenses 40 with different focal lengths (for example, a vehicular lamp unit 100 having a projection lens 40 of F70 mm, a vehicular lamp unit 100 having a projection lens 40 of F50 mm, F20 mm). The vehicle lamp unit 100) having the projection lens 40 is arranged in the left-right direction or the up-down direction. And the optical axis AX of each vehicle lamp unit 100 is adjusted so that the light distribution pattern projected by each projection lens 40 may overlap. As a result, for example, as shown in FIG. 5, it is possible to form light distribution patterns P1 to P3 whose size and brightness change in a gradation, and the assembled road surface light distribution illuminance pattern can be made substantially uniform. Become. In FIG. 5, the light distribution pattern P1 is the brightest projected by the F70 mm projection lens 40, and the light distribution pattern P2 is projected by the F50mm projection lens 40, which is darker than the light distribution pattern P1. The light pattern P3 is projected by the F20 mm projection lens 40 and is darker than the light distribution pattern P2.

[Second reflector 50]
As shown in FIGS. 2 and 3, reflection surfaces 51 </ b> R and 51 </ b> L of the second reflector 50 are disposed on both sides of the semiconductor light source 10. The second reflector 50 has the semiconductor light source 10 positioned in the opening 52 between the reflective surfaces 51R and 51L, and the heat radiating member 12 with the reflective surfaces 51R and 51L positioned on both sides of the semiconductor light source 10, respectively. It is fixed with screws.

  A left light-shielding shutter 53L is disposed between the left reflective surface 51L of the second reflector 50 and the opening 52. The focal point of the left reflecting surface 51L (in this embodiment, parabolic reflecting surface 51L) is set to the upper edge (or the vicinity thereof) of the light shielding shutter 53L. Therefore, as shown in FIG. 3, the light from the semiconductor light source 10 reflected by the right elliptical reflecting surface 22R is partially shielded by the left shading shutter 53L, and then the left reflecting surface 51L (parabolic reflecting surface). 51L).

  Similarly, a right light shielding shutter 53R is disposed between the right reflecting surface 51R of the second reflector 50 and the opening 52. The focal point of the right reflecting surface 51R (parabolic reflecting surface 51R in this embodiment) is set at the upper edge (or the vicinity thereof) of the light shielding shutter 53R. Therefore, as shown in FIG. 3, the light from the semiconductor light source 10 reflected by the left elliptical reflecting surface 22L is partially shielded by the right shielding shutter 53R and then the right reflecting surface 51R (parabolic reflecting surface). 51R). The light shielding shutters 53R and 53L form a light distribution pattern that spreads in the horizontal direction at a position where the glare light is not irradiated on the opposite lane side (for example, 0.57 degrees below the horizontal line with respect to the horizontal direction).

  The second reflector 50 is integrally formed, for example, by injection molding a synthetic resin, and at least a portion corresponding to the reflecting surfaces 51R and 51L is subjected to a mirror surface treatment such as aluminum vapor deposition.

  The reflection surfaces 51R and 51L of the second reflector 50 are reflection surfaces for reflecting the light from the semiconductor light source 10 reflected by the inner reflection surfaces 22R and 22L of the first reflector 20 forward. 3, parabolic reflecting surfaces 51 </ b> R and 51 </ b> L such as rotating paraboloids disposed on the left and right sides of the semiconductor light source 10.

  In FIG. 3, the left parabolic reflecting surface 51L has a focal point set at the upper end edge (or the vicinity thereof) of the left light-shielding shutter 53L provided on the left side, and the light distribution spreading in the horizontal direction. It is formed so as to form a pattern. Therefore, the left parabolic reflecting surface 51L reflects the light emitted from the semiconductor light source 10 by the right elliptical reflecting surface 22R and partially blocked by the left shading shutter 53L. . Accordingly, as shown in FIG. 5, a light distribution pattern P4 (light distribution pattern for a passing beam) having a low beam cutoff pattern and extending in the horizontal direction is formed by the light shielding shutter 53L.

  Similarly, the parabolic reflecting surface 51R on the right side has a focal point set at the upper end edge (or the vicinity thereof) of the light shielding shutter 53R provided on the right side, and has a light distribution pattern spreading in the horizontal direction. It is formed to form. Therefore, the right parabolic reflecting surface 51R reflects the light emitted from the semiconductor light source 10 by the left elliptical reflecting surface 22L and partially blocked by the right light blocking shutter 53R toward the front. . As a result, as shown in FIG. 5, a predetermined light distribution pattern P4 (light distribution pattern for the passing beam) that has the cutoff pattern of the passing beam and spreads in the horizontal direction is formed by the light shielding shutter 53R.

  As described above, according to the vehicular lamp unit 100 of the present embodiment, since the semiconductor light source 10 is covered with the first reflector 20, the projection lens 40 is placed in front of the opening 21 of the first reflector 20. Even if it is arranged at a position not in contact with 20 (that is, even if the projection lens 40 is arranged as if it is floating in the air), the semiconductor light source 10 is not visually recognized from the outside. That is, according to the vehicle lamp unit 100 of the present embodiment, the projection lens 40 is arranged as if it is floating in the hollow, and the semiconductor light source 10 is not visually recognized from the outside (or hardly visible). It becomes possible to provide a vehicular lamp unit having a design.

  Further, according to the vehicle lamp unit 100 of the present embodiment, the light that does not pass through the opening 21 of the first reflector 20 (that is, the light that is emitted from the semiconductor light source 10 and that does not enter the projection lens 40) is the first. Since the light is reflected forward by the reflection surfaces 22R and 22L of the reflector 20 and the reflection surfaces 51R and 51L of the second reflector 50, light that does not enter the projection lens 40 out of light emitted from the semiconductor light source 10 is effectively used. It becomes possible.

  Moreover, according to the vehicle lamp unit 100 of the present embodiment, the first reflector 20 that covers the semiconductor light source 10 is formed with the opening 21 for allowing the light emitted from the semiconductor light source 10 to pass therethrough. Even if heat is generated with the light emission, heat can be radiated from the opening 21.

  Furthermore, according to the vehicular lamp unit 100 of the present embodiment, the projection lens 40 is disposed at a position not in contact with the first reflector 20 in front of the opening 21 of the first reflector 20, so that the semiconductor light source 10 emits light. It is possible to obtain a desired light distribution pattern without being substantially affected by the accompanying heat generation.

  Next, a modified example will be described.

  FIG. 7 is a perspective view of the vehicular lamp unit 100 (modified example) using a lens plate 60 in which the projection lens 40 and the left and right diffusion lenses 61R and 61L are integrally formed instead of the projection lens 40. FIG. 8 is a cross-sectional view of the vehicular lamp unit 100 shown in FIG.

  In this modification, the projection lens 40 is disposed at a position not in contact with the first reflector 20 in front of the opening 21 of the first reflector 20 by fixing the mounting legs 62 of the lens plate 60 to the first reflector 20 with screws. In addition, the left and right diffusing lenses 61R and 61L are disposed at positions that do not contact the first reflector 20 in front of the reflecting surfaces 51R and 51L of the second reflector 50. Other configurations are the same as in the above embodiment. According to this modification, the reflected light from the reflecting surfaces 51R and 51L of the second reflector is irradiated forward through the horizontal diffusion lenses 61R and 61L, so that a desired light distribution pattern spreading in the horizontal direction can be obtained. It becomes possible to form. Further, since the projection lens 40 and the diffusing lenses 61R and 61L are integrally formed, it is possible to easily attach the lenses 40 and the like.

  FIG. 9 is a partially enlarged view of the vehicular lamp unit 100 (modified example) in which the first reflector 20 is provided with a semiconductor light source 70 such as an LED that emits light that enters the projection lens mounting leg 41. According to this modification, it is possible to visually recognize the projection lens mounting leg 41, the projection lens 40, and the like as they emit light due to the light guide lens effect. For example, it is conceivable that the semiconductor light source 70 is turned on when the position lamp is lit to cause the projection lens mounting leg 41 and the like to emit light.

  FIG. 10 is a cross-sectional view of the vehicular lamp unit 100 (modified example) using a flat reflecting surface as the reflecting surfaces 51R and 51L of the second reflector 50 instead of a parabolic reflecting surface. In the present modification, projection lenses 80R and 80L are disposed at positions where the second reflector 50 does not contact the first reflector 20 in front of the reflecting surfaces 51R and 51L. The second focal point of the right elliptical reflecting surface 22R is set to the focal point (or the vicinity of the focal point) of the right projection lens 80R. Similarly, the second focal point of the left elliptical reflecting surface 22L is set to the focal point (or the vicinity of the focal point) of the left projection lens 80L. Therefore, according to the present modification, the left and right reflecting surfaces 51R and 51L can form a light distribution pattern that is spot-irradiated in a specific direction, not a light distribution pattern that spreads in the horizontal direction.

  In the above embodiment, the example using the light shielding shutter 30 has been described, but the present invention is not limited to this. You may comprise the vehicle lamp unit 100 which abbreviate | omitted the light shielding shutter 30. FIG.

  Note that the vehicular lamp unit 100 has a structure in which a light source image is directly projected to form a light distribution pattern, so that the position of the semiconductor light source 10 is based on the position of the light-shielding shutter 30 in order to make the light distribution spread horizontally. The target light distribution, such as those installed in the direction of illuminating the shoulder direction on the lane side, those installed in the direction of illuminating the front direction of the white lane side, those installed in the direction of irradiating the oncoming vehicle side The lamp body may be configured by combining the units 100 in which the position of the semiconductor light source 10 is shifted vertically and horizontally according to the pattern.

  Further, in order to create a left-right spread of the light distribution, the semiconductor light source 10 may be fixed, and the position of the projection lens 40, the position of the shutter 30, etc. may be changed.

  Further, a plurality of units 100 in which the focal length of the projection lens 40 is changed may be configured as a passing beam lamp module, a traveling beam lamp module, and a fo-clamp module in one lamp body. In this case, aiming is performed for each lamp module.

  The above embodiment is merely an example in all respects. The present invention is not construed as being limited to these descriptions. The present invention can be implemented in various other forms without departing from the spirit or main features thereof.

  DESCRIPTION OF SYMBOLS 100 ... Vehicle lamp unit, 10 ... Semiconductor light source, 10a ... Light-emitting surface, 11 ... Predetermined substrate, 12 ... Radiation member, 20 ... 1st reflector, 21 ... Opening, 22 ... Inner reflection surface, 22R, 22L ... Elliptic reflection Surface, 23 ... outer surface, 30 ... light-shielding shutter, 30a ... opening pattern, 31 ... direct acting actuator, 40 ... projection lens, 41 ... projection lens mounting leg, 41a ... one end, 41b ... other end, 50 ... second reflector 51L: Reflective surface, 51L: Left reflective surface, 51R: Right reflective surface, 52: Opening, 53L: Left light shielding shutter, 53R: Right light shielding shutter, 60: Lens plate, 61R: Diffuse lens, 62: Mounting leg, 70 ... Semiconductor light source, 80L, 80R ... Projection lens

Claims (10)

In a vehicle lamp unit mounted on a vehicle,
A semiconductor light source;
The semiconductor light source has a reflecting surface for reflecting light emitted, and is disposed in front of the light emitting surface of the semiconductor light source with the reflecting surface facing the light emitting surface of the semiconductor light source. An opening for passing light emitted from the semiconductor light source at a position, and a first reflector covering the semiconductor light source;
A second reflector having a reflective surface disposed on each side of the semiconductor light source;
A first projection lens that is disposed in a position not in contact with the first reflector in front of the opening of the first reflector and projects light that has passed through the opening of the first reflector out of light emitted from the semiconductor light source. When,
With
The reflection surface of the first reflector is configured to reflect light that does not pass through the opening of the first reflector among light emitted from the semiconductor light source toward the reflection surface of the second reflector,
The reflection surface of the second reflector is configured to reflect the light reflected by the reflection surface of the first reflector out of the light emitted from the semiconductor light source toward the front,
The first reflector is made of a synthetic resin provided with the reflecting surface composed of a concave inner reflecting surface and an outer surface on the opposite side.
The opening penetrates from the inner reflective surface to the outer surface, and is smaller than the projection lens,
The vehicular lamp unit, wherein the first projection lens is fixed at a projection lens mounting leg made of a transparent or translucent material so as to be separated from the outer surface.   The vehicular lamp unit according to claim 1, wherein the first projection lens has a shape obtained by cutting up, down, left, and right of a convex lens.   The opening of the first reflector is set to have a shape and a size that allow only light incident on the entire surface of the first projection lens among light emitted from the semiconductor light source to pass through. The vehicle lamp unit described. The projection lens mounting leg includes one end to which the first projection lens is fixed, and the other end fixed to the first reflector side,
The first projection lens is disposed at a position in front of the opening of the first reflector and not in contact with the first reflector by fixing the other end of the projection lens mounting leg to the first reflector side. The vehicular lamp unit according to any one of claims 1 to 3. The reflective surfaces of the first reflector are a pair of elliptical reflective surfaces arranged adjacent to each other,
The reflecting surface of the second reflector is a parabolic reflecting surface disposed on each side of the semiconductor light source,
The one elliptical reflective surface has a first focal point set at or near the semiconductor light source, and a second focal point at or near the focal point of the one parabolic reflective surface,
The other elliptical reflecting surface has a first focal point set at or near the semiconductor light source, and a second focal point set at or near the focal point of the other parabolic reflecting surface. The vehicular lamp unit according to any one of claims 1 to 4, characterized in that: Between the one elliptical reflective surface and the one parabolic reflective surface, a first light shielding shutter for shielding a part of the light from the semiconductor light source reflected by the first reflector is disposed. ,
The focal point of the one parabolic reflecting surface is set at or near the upper edge of the first light-shielding shutter,
Between the other elliptical reflective surface and the other parabolic reflective surface, a second light-shielding shutter that shields part of the light from the semiconductor light source reflected by the first reflector is disposed. ,
6. The vehicular lamp unit according to claim 5, wherein the focal point of the other paraboloidal reflecting surface is set at or near the upper edge of the second light shielding shutter. The reflective surfaces of the first reflector are a pair of elliptical reflective surfaces arranged adjacent to each other,
The reflective surface of the second reflector is a flat reflective surface disposed on each side of the semiconductor light source,
A second projection lens disposed in front of each of the planar reflective surfaces;
The one elliptical reflecting surface has a first focal point set to the semiconductor light source or the vicinity thereof, and a second focal point is a focal point of a second projection lens disposed in front of the reflecting surface of the one plane or the same. Is set in the vicinity,
The other elliptical reflecting surface has a first focal point set at or near the semiconductor light source, and a second focal point located at the front of the reflecting surface on the other plane, or the focal point thereof. The vehicular lamp unit according to any one of claims 1 to 4, wherein the vehicular lamp unit is set in the vicinity. Between the one elliptical reflective surface and the reflective surface of the one plane, a first light shielding shutter that shields a part of the light from the semiconductor light source reflected by the first reflector is disposed,
A second light-shielding shutter that shields part of the light from the semiconductor light source reflected by the first reflector is disposed between the other elliptical reflective surface and the reflective surface of the other flat surface. The vehicular lamp unit according to claim 7, wherein the vehicular lamp unit is a vehicular lamp unit. The reflection surface of the first reflector is a pair of elliptical reflection surfaces arranged adjacent to the left and right,
The reflective surface of the second reflector is a flat reflective surface disposed on each of the left and right sides of the semiconductor light source,
The one elliptical reflective surface is arranged on the right side,
The reflective surface of the one plane is disposed on the left side,
The other elliptical reflective surface is disposed on the left side,
The vehicular lamp unit according to claim 7 or 8, wherein the reflection surface of the other plane is arranged on the right side. Having a plurality of vehicle lamp units according to any one of claims 1 to 9,
The focal lengths of the first projection lenses of the respective vehicle lamp units are different from each other,
The vehicular lamp, wherein the optical axis of each of the vehicular lamp units is adjusted so that the light distribution patterns projected by the respective first projection lenses overlap.

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