JP2010212110A - Vehicular lamp tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To form a reflecting surface and an auxiliary reflecting surface of a reflector, and an added reflecting surface and an auxiliary reflecting surface of a lower housing at the same reflection factor in a conventional vehicular lamp tool. <P>SOLUTION: In a vehicular lamp tool, a converged reflecting surface 8 of the reflector 2 and the added reflecting surface 17 of a shade and an added reflector 5 are made of reflecting surfaces with a high reflection factor; and the auxiliary reflecting surface 9 of the reflector 2, the auxiliary reflecting surface 18 of the shade and the added reflector 5 are made of reflecting surfaces with a low reflection factor. AS a result, brightness of a light-distribution pattern LP for passing each other obtained by the reflecting surfaces 8, 17 with a high reflection factor is made bright, and brightness of a light-distribution pattern OP for an overhead sign obtained by the reflecting surfaces 9, 18 with a low reflection factor can be restrained. Thus, the vehicular lamp tool can achieve the light-distribution pattern corresponding to the standard for vehicular lamp tools. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a projector-type vehicular lamp.

  This type of vehicular lamp is conventionally known (for example, Patent Document 1). Hereinafter, this conventional vehicle lamp will be described. A conventional vehicular lamp includes a reflector having a reflective surface, an LED, a projector lens, and a lower housing having a shade and an intermediate reflective surface. In a conventional vehicle lamp, when an LED is turned on, the light from the LED is reflected by the reflecting surface of the reflector, a part of the reflected light is cut off by the shade, and the reflected light that is not cut off is reflected on the projector lens side. Further, the reflected light cut off is reflected to the projector lens side by the intermediate reflecting surface, and a light distribution pattern having a cut-off line is emitted from the projector lens to the front of the vehicle.

  In the conventional vehicular lamp described above, an auxiliary reflecting surface may be provided on the reflector or the lower housing. However, in the conventional vehicular lamp, the reflecting surface and auxiliary reflecting surface of the reflector and the additional reflecting surface and auxiliary reflecting surface of the lower housing are formed by reflecting surfaces having the same reflectance.

JP 2008-204903 A

  The problem to be solved by the present invention is that a conventional vehicular lamp is formed by a reflecting surface having the same reflectivity as the reflecting surface or auxiliary reflecting surface of the reflector and the additional reflecting surface or auxiliary reflecting surface of the lower housing. It is in.

  The present invention (the invention according to claim 1) includes a reflector having a converging reflection surface based on an ellipse, and a semiconductor in which a light emitting portion is positioned at or near the first focal point of the converging reflection surface. A light source, a projection lens whose lens focal point is located at or near the second focal point of the converging reflective surface, and between the projection lens and the semiconductor light source. A shade that cuts off part of the reflected light reflected by the surface to form a cut-off line of the light distribution pattern, and an additional reflective surface that reflects the cut-off reflected light to the projection lens side are provided. A shade and additional reflector, and at least an auxiliary reflecting surface provided on the reflector, and a convergent reflecting surface and either the additional reflecting surface or the auxiliary reflecting surface of the reflector Is a reflective surface having a high reflectance, and either the additional reflective surface or the auxiliary reflective surface of the reflector is a reflective surface having a lower reflectance than the reflective surface having a high reflectance. .

  Further, in the present invention (the invention according to claim 2), a reflective surface having a high reflectance is formed on the surface of a portion formed at a location where the polishing level of the mold is polished at a high level. A reflective surface with a low reflectivity is formed on the surface of the molded part of the mold where the polishing level of the mold is polished at a lower level than the reflective surface with a high reflectivity. It is characterized by comprising a metal reflective film.

  Further, according to the present invention (the invention according to claim 3), the reflective surface having a high reflectivity is formed of a metal reflective film formed without using a mesh filter or using a mesh filter having a large mesh diameter, and has low reflection. The reflective surface having the reflectance is made of a metal reflective film formed using a mesh filter having a mesh diameter smaller than that of the reflective surface having a high reflectance.

  Furthermore, in the present invention (the invention according to claim 4), the reflective surface having a high reflectivity is composed of a chromium base film and a metal reflective film formed on the surface of the chromium base film, and has a low reflectivity. The reflective surface is composed of a metal reflective film formed on the surface of the portion masked when the chromium underlayer film is formed.

  Furthermore, according to the present invention (the invention according to claim 5), the reflective surfaces having high reflectivity are the converging-type reflective surface and the auxiliary reflective surface of the reflector, and a silver alloy metal reflective film and a silver alloy metal reflectivity are provided. A protective film formed on the surface of the film, and the reflective surface having a low reflectance is an additional reflective surface of the shade and additional reflector, and is formed on the surface of the aluminum metal reflective film and the surface of the aluminum metal reflective film. And a protective film formed.

  Furthermore, according to the present invention (the invention according to claim 6), the reflective surfaces having high reflectivity are the converging-type reflective surface and the auxiliary reflective surface of the reflector, and an aluminum metal reflective film and an aluminum metal reflective film are provided. The reflective surface having a low reflection rate is an additional reflective surface of the shade and additional reflector, and includes an aluminum metal reflective film and an aluminum metal reflective film. And a protective film formed on the surface.

  The vehicular lamp according to the present invention (the invention according to claim 1) has a converging reflection surface and either an additional reflection surface or an auxiliary reflection surface of a reflector as a high-reflectivity reflection surface, while additional reflection is performed. Either the surface or the auxiliary reflecting surface of the reflector is a reflecting surface having a lower reflectance than the reflecting surface having a high reflectance. As a result, the vehicular lamp according to the present invention (the invention according to claim 1) increases the brightness of the main light distribution pattern obtained on the converging-type reflecting surface, and on the other hand, the auxiliary reflecting surface of the additional reflecting surface or reflector. The brightness of the sub light distribution pattern obtained on either one of the surfaces can be suppressed. As described above, the vehicular lamp of the present invention (the invention according to claim 1) can obtain a light distribution pattern corresponding to the standard of the vehicular lamp.

  The vehicle lamp of the present invention (the invention according to claim 2) selectively forms metal reflective films having different reflectivities by changing the polishing level of the mold, that is, the reflectivity differs. A reflective surface can be selectively formed. As a result, the vehicular lamp according to the present invention (the invention according to claim 2) selectively deposits metal reflective films having different reflectivities by vapor deposition without changing the polishing level of the mold (in this case). Compared with the case where metal reflective films with different reflectivities are formed by vapor deposition, it is necessary to change the masking location and conditions, which increases the number of processes (number of vapor deposition batches) and increases manufacturing costs. Therefore, it is possible to selectively form metal reflective films having different reflectivities without increasing the number of steps, and to reduce the cost of film formation processing. In addition, the vehicular lamp of the present invention (the invention according to claim 2) polishes a portion of the mold where the reflective surface with high reflectivity is formed at a high level, and forms a reflective surface with low reflectivity among the mold. Since the polishing area is polished at a low level, the high-level polishing range is limited, so that the number of polishing steps can be reduced and the film processing cost can be reduced compared to the case where all the areas are polished at a high level. The manufacturing cost can be reduced.

  Furthermore, the vehicular lamp of the present invention (the invention according to claim 3) selectively forms metal reflective films having different reflectivities without using a mesh filter or by changing the mesh diameter of the mesh filter. Filming, that is, reflecting surfaces having different reflectivities can be selectively formed. As a result, the vehicular lamp according to the present invention (the invention according to claim 3), when a metal reflective film having a different reflectance is selectively formed by vapor deposition without using a mesh filter (in this case, Each time a metal reflective film with a different reflectance is deposited by vapor deposition, it is necessary to change the masking location and conditions, which increases the number of production steps (number of vapor deposition batches) and increases manufacturing costs. Therefore, it is possible to selectively form metal reflective films having different reflectivities without increasing the film thickness, and to reduce the film processing cost.

  Furthermore, the vehicular lamp according to the present invention (the invention according to claim 4) selectively forms metal reflective films having different reflectivities by forming or not forming a chromium base film. That is, it is possible to selectively form reflective surfaces having different reflectivities. As a result, the vehicular lamp according to the present invention (the invention according to claim 4) does not form a chromium base film, but selectively forms a metal reflective film having a different reflectance by vapor deposition (in this case). Compared with the case where metal reflective films with different reflectivities are formed by vapor deposition, it is necessary to change the masking location and conditions, which increases the number of processes (number of vapor deposition batches) and increases manufacturing costs. Therefore, it is possible to selectively form metal reflective films having different reflectivities without increasing the number of steps, and to reduce the cost of film formation processing. Moreover, in the vehicular lamp of the present invention (the invention according to claim 4), the adhesion between the metal reflecting surface and the reflector / shade and additional reflector is improved by the chromium base film, so that the durability of the metal reflecting surface is improved. To do.

  Furthermore, the vehicular lamp of the present invention (the invention according to claim 5) is provided with a silver alloy metal reflective film and a silver reflective film on the converging reflective surface and auxiliary reflective surface of a reflector for which a reflective surface having high reflectivity is desired. A protective film formed on the surface of the metal reflective film of the alloy, and on the additional reflective surface of the shade and additional reflector for obtaining a low-reflectance reflective surface than the silver alloy metal reflective film Also, an inexpensive aluminum metal reflection film and a protective film formed on the surface of the aluminum metal reflection film are formed. As a result, the vehicular lamp of the present invention (the invention according to claim 5) can combine a reflector having a reflecting surface with different reflectivity and a shade and additional reflector as a lamp unit. Reduction can be achieved.

  Furthermore, in the vehicular lamp of the present invention (the invention according to claim 6), an aluminum metal reflecting film and an aluminum reflecting film are provided on the converging reflecting surface and the auxiliary reflecting surface of a reflector for which a reflecting surface having a high reflectance is to be obtained. A multi-layer enhanced reflection function protective film is formed on the surface of the metal reflection film, and an aluminum metal reflection film is provided on the additional reflection surface of the shade and additional reflector to obtain a reflection surface having a low reflectance. And a protective film formed on the surface of the aluminum metal reflective film, which is less expensive than the protective film for enhanced reflection function. As a result, the vehicular lamp of the present invention (invention according to claim 6) can combine a reflector having a reflecting surface with a different reflectance and a shade and additional reflector as a lamp unit. Reduction can be achieved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view (vertical cross-sectional view) which shows Example 1 of the vehicle lamp concerning this invention. Similarly, it is explanatory drawing which shows the light distribution pattern irradiated ahead of a vehicle. Similarly, it is a side view which shows a reflector. Similarly, it is the IV arrow line view in FIG. Similarly, it is a side view showing a shade and additional reflector. Similarly, it is VI arrow figure in FIG. It is a bottom view (figure corresponding to Drawing 4) of a reflector showing Example 4 of a vehicular lamp concerning this invention. Similarly, it is a top view (figure corresponding to Drawing 6) of a shade and addition reflector.

  Below, 5 examples of the examples of the vehicular lamp according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In the drawing, reference sign “VU-VD” indicates vertical lines on the upper and lower sides of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen. Reference sign “Z-Z” indicates the lamp optical axis (the optical axis of the lamp unit, the optical axis of the convergent reflection surface, and the optical axis of the projection lens).

  FIGS. 1-6 shows Example 1 of the vehicle lamp concerning this invention. Hereinafter, the configuration of the vehicular lamp in the first embodiment will be described. In this example, for example, an automotive headlamp will be described. In FIG. 1, reference numeral 1 denotes a vehicular lamp in the first embodiment. As shown in FIG. 1, the vehicular lamp 1 is a so-called projector type and has a unit structure. The vehicular lamp 1 includes a reflector 2, a semiconductor light source 3, a projection lens (convex lens, condensing lens) 4, a shade / addition reflector 5, a heat sink member 6, and an unillustrated automotive headlamp lamp. And a housing and a lamp lens (for example, a transparent outer lens).

  The reflector 2, the semiconductor-type light source 3, the projection lens 4, the shade / addition reflector 5, and the heat sink member 6 constitute a lamp unit. One or a plurality of the lamp units are arranged, for example, via an optical axis adjusting mechanism in a lamp chamber defined by a lamp housing and a lamp lens of an automotive headlamp.

  The reflector 2 is composed of a light-impermeable resin member or the like, and is also used as a holding member such as a casing, a housing, or a holder. The reflector 2, the shade / addition reflector 5, and the heat sink member 6 are fixed to each other.

  The front portion of the reflector 2 constitutes a semi-cylindrical holder portion 7. The projection lens 4 is fixed to the holder portion 7. On the other hand, the portion from the center side to the rear side of the reflector 2 is composed of a closed portion in the upper portion and an opening portion in the lower portion substantially horizontally along the optical axis ZZ. A converging reflection surface 8 is provided on the concave inner surface of the dome-shaped blocking portion of the reflector 2. An auxiliary reflection surface 9 is provided on the inner surface of the reflector 2 between the holder portion 7 and the converging reflection surface 8.

  The convergent reflecting surface 8 is a reflecting surface based on an ellipse, for example, a rotating ellipsoid or a reflecting surface such as a free-form surface (NURBS surface) based on an ellipse (the vertical cross section in FIG. 1 is an ellipsoid, and , A horizontal cross section (not shown) is a parabolic surface or a reflective surface having a deformed parabolic surface). For this reason, the convergent reflecting surface 8 has a first focal point F1 and a second focal point (focal line on the horizontal section, that is, both ends are located on the projection lens 4 side when viewed from above (plane), and the center is the above-mentioned A curved focal line located on the semiconductor-type light source 3 side) F2, and an optical axis ZZ.

  As the semiconductor-type light source 3, for example, a self-luminous semiconductor-type light source (LED in this embodiment 1) such as LED and EL (organic EL) is used. The semiconductor-type light source 3 includes a thermally conductive insulating substrate (for example, ceramic) substrate 10 and a light emitting body of a small rectangular (square shape) LED chip provided on one surface (upper surface) of the substrate 10. And a substantially hemispherical (dome-shaped) light transmitting member (lens) 11 covering the light emitter. The substrate 10 of the semiconductor light source 3 is fixed to one surface (upper surface) of the heat sink member 6. The light emitter (light emitting portion) of the semiconductor-type light source 3 is located at or near the first focal point F1 of the convergent reflective surface 8.

  The projection lens 4 is an aspherical convex lens. The projection lens 4 includes a front side (external side) portion having an emission surface, a rear side portion (side of the semiconductor-type light source 3) having an incident surface, the front side portion, and the rear side portion. And a rib portion provided integrally therewith. The exit surface of the projection lens 4 has a convex aspherical surface with a large curvature (small curvature radius), while the incident surface of the projection lens 4 has a convex aspherical surface with a small curvature (large curvature radius). Eggplant. By using such a projection lens 4, the focal length of the projection lens 4 is reduced, and accordingly, the dimension of the projection lens 4 of the vehicular lamp 1 in this embodiment 1 in the optical axis ZZ direction. Becomes compact. The rear side of the projection lens 4 may be a flat aspheric surface (plane).

  The projection lens 4 has a front focus (focus on the semiconductor light source 3 side) and a rear focus (external focus), and an optical axis ZZ connecting the front focus and the rear focus. The optical axis ZZ of the convergent reflecting surface 8 and the optical axis ZZ of the projection lens 4 substantially coincide with each other as the lamp optical axis. The front focal point of the projection lens 4 is a lens focal point (meridional image plane that is a focal plane on the object space side) FL. The lens focal point FL of the projection lens 4 is located at or near the second focal point F2 of the convergent reflective surface 8. The light L1 emitted from the semiconductor-type light source 3 does not have high heat, so that a resin lens can be used as the projection lens 4. The projection lens 4 uses acrylic in this example. The projection lens 4 includes a main light distribution pattern having a cut-off line CL and an elbow point E, for example, a light distribution pattern for passing (low beam light distribution pattern) LP, and a sub light distribution pattern, for example, an overhead sign (overhead sign). The light distribution pattern OP is irradiated (projected) in front of the vehicle.

  The shade / addition reflector 5 is composed of a light-impermeable resin member or the like, similar to the reflector 2. The front portion of the shade and additional reflector 5 constitutes a semi-cylindrical holder portion 12. The projection lens 4 is fixed to the holder portion 12.

  The shade and additional reflector 5 is disposed between the projection lens 4 and the semiconductor light source 3. The shade and additional reflector 5 has a hollow shape, and includes a top plate portion 13 of a horizontal plate, left and right plate portions 14 of a vertical plate, and a front plate portion 15 of an arc plate or an inclined plate. Corners (edge portions, edge portions) 16 between the upper surface plate portion 13 and the front surface plate portion 15 of the shade / addition reflector 5 are defined by the cut-off line CL and the elbow point E of the passing light distribution pattern LP. It is to be formed and is located at or near the second focal point F2 of the convergent reflecting surface 8, or at the lens focal point FL of the projection lens 4.

  The shade / addition reflector 5 cuts off a part L3 of the reflected light L2 emitted from the semiconductor-type light source 3 and reflected by the convergent reflection surface 8 to cut the cut light distribution pattern LP. The shade that forms the offline CL and the elbow point E, that is, the upper surface plate portion 13 is provided.

  On the upper surface of the upper surface plate portion 13 of the shade / addition reflector 5, a part L3 of the reflected light L2 from the convergent reflection surface 8 cut off by the upper surface plate portion 13 (shade) is projected onto the projection lens 4. An additional reflection surface 17 is provided for reflection on the side. Further, on the front surface of the front plate portion 15 of the shade / addition reflector 5, the reflected light L5 which is the direct light L4 from the semiconductor-type light source 3 and reflected by the auxiliary reflection surface 9 of the reflector 2 is applied. An auxiliary reflecting surface 18 is provided for reflecting to the projection lens 4 side as the overhead sign light distribution pattern OP.

  The heat sink member 6 is made of a material having high thermal conductivity such as resin or metallic die casting. The heat sink member 6 has a flat shape at the top and a fin shape from the middle to the bottom.

  The converging-type reflective surface 8 of the reflector 2 (the portion where the dotted line hatching is applied in FIG. 4) and the additional reflective surface 17 of the shade and additional reflector 5 (the dotted line hatching is applied in FIG. 6). A location) is a reflective surface with high reflectivity. On the other hand, the auxiliary reflecting surface 9 of the reflector 2 (the portion where the solid line hatching is applied in FIG. 4) and the auxiliary reflecting surface 18 of the shade and additional reflector 5 (the solid line hatching is applied in FIG. 6). Is a reflecting surface having a lower reflectance than the reflecting surfaces 8 and 17 having a high reflectance.

  The reflective surfaces 8 and 17 having high reflectivity are, for example, reflective surfaces having a reflectivity of 90% or more, and a mold polishing level of a mold (not shown) for molding the reflector 2 is high. It consists of a metal reflective film formed on the surface of the portion molded at the location polished by (in this example, 10,000 or more). On the other hand, the low-reflectivity reflecting surfaces 9 and 18 are, for example, reflective surfaces having a reflectance of 90% or less, and the mold polishing level of the mold for forming the shade and additional reflector 5 is high. It consists of a metal reflective film formed on the surface of the portion molded at a location polished at a level lower than the reflective surfaces 8 and 17 (in this example, no more than 10,000).

  The vehicular lamp 1 according to the first embodiment is configured as described above, and the operation thereof will be described below.

  First, the light emitter of the semiconductor light source 3 of the vehicular lamp 1 is turned on. Then, lights L1 and L4 are emitted from the light emitter of the semiconductor-type light source 3. A part L1 of the light L1 and L4 emitted from the light emitting body of the semiconductor light source 3 is reflected by the convergent reflective surface 8 having a high reflectance, and the reflected light L2 is the second focal point F2 of the convergent reflective surface 8. Converge (concentrate). A portion L3 of the reflected light L2 that converges (concentrates) on the second focal point F2 is cut off by the shade of the upper surface plate portion 13 of the shade / addition reflector 5 and the front surface plate portion 13 of the shade / addition reflector 5 and the front L13. A cut-off line CL and an elbow point E of the light distribution pattern LP for passing are formed by the corner portion 26 with the face plate portion 15. Most of the reflected light L3 cut off by the shade / addition reflector 5 is reflected to the projection lens 4 side by the high reflection additional reflection surface 17 on the upper surface of the upper surface plate portion 13 of the shade / addition reflector 5. On the other hand, the reflected light L2 that has not been cut off by the shade of the upper surface plate portion 13 of the shade / addition reflector 5 proceeds to the projection lens 4 side as it is.

  The light L2 traveling to the projection lens 4 side and the light L3 reflected to the projection lens 4 side are transmitted through the projection lens 4 to invert the light image at the lens focal point FL of the projection lens 4 vertically and horizontally. A light image, that is, a passing light distribution pattern LP having a cut-off line CL and an elbow point E is projected in front of the automobile (vehicle) to illuminate the road surface and the like. This passing light distribution pattern LP is reflected once by the high-reflectivity convergent reflective surface 8 and twice by the high-reflectivity convergent reflective surface 8 and the high-reflectivity additional reflective surface 17. Because it is formed, it is bright (luminance, illuminance, etc. are high).

  On the other hand, of the light L1 and L4 from the light emitting body of the semiconductor-type light source 3, the light L4 that has not entered the high-reflectivity convergent reflective surface 8 is directly reflected as the auxiliary reflective surface 9 of the low-reflectivity reflector 2. Reflected by. The reflected light L5 is reflected toward the projection lens 4 by the auxiliary reflecting surface 18 of the shade / addition reflector 5 having a low reflectance.

  The light L5 reflected toward the projection lens 4 is transmitted through the projection lens 4 and projected as an overhead sign light distribution pattern OP in front of the automobile (vehicle) to illuminate an overhead sign or the like. This overhead sign light distribution pattern OP is formed by two reflections of the auxiliary reflection surface 9 of the reflector 2 with low reflectance and the auxiliary reflection surface 18 of the shade / addition reflector 5 with low reflectance. Compared with the light distribution pattern LP for passing, brightness is suppressed (luminance, illuminance, etc. are low).

  The vehicular lamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  In the vehicular lamp 1 according to the first embodiment, the converging-type reflecting surface 8 of the reflector 2 and the additional reflecting surface 17 of the shade and additional reflector 5 are high-reflecting reflecting surfaces, while the auxiliary reflecting surface of the reflector 2 is used. 9 and the auxiliary reflection surface 18 of the shade and additional reflector 5 are reflection surfaces having a lower reflectance than the reflection surface having a high reflectance. As a result, the vehicular lamp 1 according to the first embodiment has the brightness of the light distribution pattern LP for passing obtained on the converging reflecting surface 8 of the reflector 2 having a high reflectance and the additional reflecting surface 17 of the shade / addition reflector 5. On the other hand, the brightness of the light distribution pattern OP for overhead sign obtained on the auxiliary reflecting surface 9 of the reflector 2 having a low reflectance and the auxiliary reflecting surface 18 of the shade and additional reflector 5 can be suppressed. As described above, the vehicular lamp 1 according to the first embodiment can obtain a light distribution pattern corresponding to the standard of the vehicular lamp.

  Further, the vehicular lamp 1 according to the first embodiment selectively selects metal reflective films having different reflectivities by changing the polishing level of the mold for forming the reflector 2 and the mold for forming the shade and additional reflector 5. Film formation, that is, reflecting surfaces having different reflectivities (the converging reflecting surface 8 of the reflector 2 having a high reflectivity and the additional reflecting surface 17 of the shade / additive reflector 5 and the auxiliary reflecting surface 9 of the reflector 2 having a low reflectivity) And the auxiliary reflecting surface 18) of the shade and additional reflector 5 can be selectively formed. As a result, the vehicular lamp 1 according to the first embodiment has a case where a metal reflective film having a different reflectance is selectively formed by vapor deposition without changing the polishing level of the mold (in this case, the reflectance is reduced). Each time a different metal reflective film is deposited by vapor deposition, it is necessary to change the masking location and conditions, so the number of processes (the number of vapor deposition batches increases and the manufacturing cost increases) increases the number of processes. In addition, it is possible to selectively form metal reflective films having different reflectivities, and it is possible to reduce the cost of film formation processing.

  Moreover, the vehicular lamp 1 according to the first embodiment includes a converging-type reflecting surface 8 and a shade / addition reflector of the reflector 2 having a high reflectivity among molds for forming the reflector 2 and a mold for forming the shade / addition reflector 5. 5 is polished at a high level to form the reflector 2, and the auxiliary reflecting surface 9 and the shade of the reflector 2 having a low reflectivity out of the mold for forming the reflector 2 and the additional reflector 5 are molded. Since the portion where the auxiliary reflecting surface 18 of the additional reflector 5 is formed is polished at a low level, the polishing range at a high level is limited, so that the number of polishing steps is reduced as compared with the case where all the portions are polished at a high level. In addition, the film forming cost can be reduced, and the manufacturing cost can be reduced.

  Hereinafter, the vehicular lamp according to the second embodiment will be described with reference to FIGS. The vehicular lamp according to the second embodiment includes a converging reflective surface 8 of the reflector 2 (a portion indicated by dotted line hatching in FIG. 4) and an additional reflective surface 17 of the shade and additional reflector 5 (dotted line in FIG. 6). The hatched portion) is a reflective surface having a high reflectivity, while the auxiliary reflecting surface 9 of the reflector 2 (the portion where the solid line hatching is applied in FIG. 4) and the shade / additional reflector 5 The auxiliary reflecting surface 18 (the portion where solid line hatching is given in FIG. 6) is a reflecting surface having a lower reflectance than the reflecting surfaces 8 and 17 having a high reflectance.

  The reflective surfaces 8 and 17 having a high reflectance are, for example, reflective surfaces having a reflectance of 90% or more, and are formed using a mesh filter without using a mesh filter or using a mesh filter having a large mesh diameter. Consists of. On the other hand, the reflection surfaces 9 and 18 having a low reflectance are, for example, reflection surfaces having a reflectance of 90% or less, and a mesh filter having a mesh diameter smaller than that of the reflection surfaces 8 and 17 having a high reflectance is used. It consists of a formed metal reflective film.

  Since the vehicular lamp in the second embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the vehicular lamp in the first embodiment. In particular, the vehicular lamp according to the second embodiment selectively forms metal reflective films having different reflectivities without using a mesh filter or by changing the mesh diameter of the mesh filter. Reflective surfaces having different reflectivities (the converging reflective surface 8 of the reflector 2 having a high reflectivity and the additional reflective surface 17 of the shade / additive reflector 5 and the auxiliary reflective surface 9 and the shade / additive reflector 5 of the reflector 2 having a low reflectivity) The auxiliary reflecting surface 18) can be selectively formed. As a result, the vehicular lamp according to the second embodiment does not use a mesh filter and selectively forms metal reflective films having different reflectivities by vapor deposition (in this case, metal reflection having different reflectivities). Each time the film is deposited by vapor deposition, it is necessary to change the masking location and conditions, which increases the number of processes (the number of vapor deposition batches and increases the manufacturing cost). Therefore, it is possible to selectively form metal reflection films having different thicknesses, and to reduce the cost of film formation processing.

  Hereinafter, the vehicle lamp in Example 3 is demonstrated with reference to FIGS. The vehicular lamp according to the third embodiment includes a convergent reflection surface 8 of the reflector 2 (a portion where hatching is performed in FIG. 4) and an additional reflection surface 17 of the shade and additional reflector 5 (dotted line in FIG. 6). The hatched portion) is a reflective surface having a high reflectivity, while the auxiliary reflecting surface 9 of the reflector 2 (the portion where the solid line hatching is applied in FIG. 4) and the shade / additional reflector 5 The auxiliary reflecting surface 18 (the portion where solid line hatching is given in FIG. 6) is a reflecting surface having a lower reflectance than the reflecting surfaces 8 and 17 having a high reflectance.

  The high-reflectivity reflective surfaces 8 and 17 are, for example, reflective surfaces having a reflectivity of 90% or more, and are composed of a chromium base film and a metal reflective film formed on the surface of the chromium base film. . On the other hand, the reflective surfaces 9 and 18 having a low reflectance are, for example, reflective surfaces having a reflectance of 90% or less, and a metal reflective film formed on the surface of the portion masked when the chromium underlayer film is formed, Consists of.

  Since the vehicular lamp in the third embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the vehicular lamp in the first and second embodiments. In particular, the vehicular lamp according to the third embodiment selectively forms metal reflective films having different reflectivities by forming or not forming a chromium base film, that is, the reflectivity is reduced. Different reflecting surfaces (the converging reflecting surface 8 of the reflector 2 with high reflectivity and the additional reflecting surface 17 of the shade / addition reflector 5, and the auxiliary reflecting surface 9 of the reflector 2 with low reflectivity and the auxiliary reflecting surface of the shade / addition reflector 5) 18) can be selectively formed. As a result, the vehicular lamp in Example 3 does not form a chromium base film, but selectively forms a metal reflective film having a different reflectance by vapor deposition (in this case, the reflectance is different). Since it is necessary to change the masking location and conditions each time a metal reflective film is formed by vapor deposition, the number of steps (the number of vapor deposition batches increases and the manufacturing cost increases), without increasing the number of steps. Metal reflective films having different reflectivities can be selectively formed, and the cost of the film forming process can be reduced. Moreover, in the vehicular lamp according to the third embodiment, the adhesion between the metal reflecting surface (the converging reflecting surface 8 and the additional reflecting surface 17), the reflector 2, and the shade and additional reflector 5 is improved by the chromium base film. The durability of the metal reflecting surface (convergent reflecting surface 8 and additional reflecting surface 17) is improved.

  7 and 8 show a fourth embodiment of the vehicular lamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 6 denote the same components. Hereinafter, the vehicular lamp in the fourth embodiment will be described.

  In the vehicular lamp according to the fourth embodiment, the converging-type reflecting surface 8 and the auxiliary reflecting surface 9 of the reflector 2 (the portions where dotted line hatching is given in FIG. 7) are reflecting surfaces with high reflectivity, The additional reflective surface 17 of the shade and additional reflector 5 (the portion where the solid line hatching is given in FIG. 8) is a reflective surface having a lower reflectance than the reflective surfaces 8 and 17 having a high reflectance.

  The reflective surfaces 8 and 9 having high reflectivity are, for example, reflective surfaces having a reflectivity of 90% or more, and are the convergent reflective surface 8 and the auxiliary reflective surface 9 of the reflector 2, and are metallic reflections of silver alloy. And a protective film formed on the surface of the silver alloy metal reflective film. On the other hand, the low-reflectance reflecting surface 17 is, for example, a reflecting surface having a reflectance of 90% or less, and is the additional reflecting surface 17 of the shade / addition reflector 5, and includes an aluminum metal reflecting film and the aluminum reflecting surface 17. And a protective film formed on the surface of the metal reflective film.

  Since the vehicular lamp in the fourth embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the vehicular lamp in the first, second, and third embodiments. In particular, in the vehicle lamp according to the fourth embodiment, a silver alloy metal reflection film and a silver alloy metal reflection film are provided on the converging reflection surface 8 and the auxiliary reflection surface 9 of the reflector 2 to obtain a reflection surface with high reflectivity. A protective film formed on the surface of the film is formed, and on the other hand, the additional reflecting surface 17 of the shade and additional reflector 5 for which a reflecting surface with low reflectance is to be obtained is cheaper than a silver alloy metal reflecting film. An aluminum metal reflection film and a protective film formed on the surface of the aluminum metal reflection film are formed. As a result, the vehicular lamp according to the fourth embodiment includes a reflector 2 having reflecting surfaces having different reflectivities (a high-convergence converging reflecting surface 8 and an auxiliary reflecting surface 9, and a low-reflecting additional reflecting surface 17). The shade and additional reflector 5 can be combined as a lamp unit, and the film forming cost can be reduced.

  Hereinafter, the vehicular lamp according to the fifth embodiment will be described with reference to FIGS. 7 and 8. In the vehicular lamp according to the fifth embodiment, the converging-type reflecting surface 8 and the auxiliary reflecting surface 9 of the reflector 2 (the portion where the dotted line hatching is applied in FIG. 7) are reflecting surfaces with high reflectivity, The additional reflective surface 17 of the shade and additional reflector 5 (the portion where the solid line hatching is given in FIG. 8) is a reflective surface having a lower reflectance than the reflective surfaces 8 and 17 having a high reflectance.

  The reflective surfaces 8 and 9 having high reflectivity are, for example, reflective surfaces having a reflectivity of 90% or more, and are the convergent reflective surface 8 and the auxiliary reflective surface 9 of the reflector 2, and are made of an aluminum metal reflective film. And an increased reflection function protection film formed in a multilayer on the surface of the aluminum metal reflection film. On the other hand, the low-reflectance reflecting surface 17 is, for example, a reflecting surface having a reflectance of 90% or less, and is the additional reflecting surface 17 of the shade / addition reflector 5, and includes an aluminum metal reflecting film and the aluminum reflecting surface 17. And a protective film formed on the surface of the metal reflective film.

  Since the vehicular lamp in the fifth embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the vehicular lamp in the first, second, third, and fourth embodiments. In particular, in the vehicular lamp according to the fifth embodiment, an aluminum metal reflecting film and an aluminum metal reflecting film are provided on the converging-type reflecting surface 8 and the auxiliary reflecting surface 9 of the reflector 2 for which a reflecting surface having a high reflectance is to be obtained. An additional reflection function protection film formed in a multilayer on the surface, and on the additional reflection surface 17 of the shade and additional reflector 5 for obtaining a reflection surface having a low reflectance, an aluminum metal reflection film, And a protective film formed on the surface of an aluminum metal reflective film that is less expensive than the protective function film for increasing reflection. As a result, the vehicular lamp according to the fifth embodiment includes a reflector 2 having reflective surfaces having different reflectivities (the high reflectivity convergent reflective surface 8 and the auxiliary reflective surface 9 and the low reflectivity additional reflective surface 17). The shade and additional reflector 5 can be combined as a lamp unit, and the film forming cost can be reduced.

DESCRIPTION OF SYMBOLS 1 Vehicle lamp 2 Reflector 3 Semiconductor type light source 4 Projection lens 5 Shade and additional reflector 6 Heat sink member 7 Holder part 8 Convergence type reflective surface 9 Auxiliary reflective surface 10 Substrate 11 Light transmission member 12 Holder part 13 Upper surface board part 14 Left and right side board part DESCRIPTION OF SYMBOLS 15 Front plate part 16 Corner | angular part 17 Additional reflective surface 18 Auxiliary reflective surface F1 The 1st focus of a converging-type reflective surface F2 The 2nd focus of a converging-type reflective surface FL The lens focus of a projection lens ZZ Optical axis (lamp optical axis, lamp Unit optical axis, optical axis of converging reflective surface, optical axis of projection lens)
L1 Light emitted from the semiconductor-type light source L2 Light reflected by the converging-type reflective surface L3 Light reflected by the additional reflective surface L4 Direct light incident on the auxiliary reflective surface of the reflector from the semiconductor-type light source L5 On the auxiliary reflective surface of the reflector Reflected reflected light HL-HR Left and right horizontal lines VU-VD Up and down vertical lines CL Cut-off line E Elbow point LP Light distribution pattern for passing OP Light distribution pattern for overhead sign

Claims (6)

In projector-type vehicle lamps,
A reflector having a convergent reflecting surface based on an ellipse;
A semiconductor-type light source disposed such that a light-emitting portion is positioned at or near the first focal point of the convergent reflective surface;
A projection lens whose lens focal point is located at or near the second focal point of the convergent reflective surface;
A light distribution pattern cut-off line is arranged between the projection lens and the semiconductor-type light source, and cuts off part of the reflected light emitted from the semiconductor-type light source and reflected by the convergent reflection surface. A shade and additional reflector provided with a shade that forms a reflection light and an additional reflection surface that reflects the cut-off reflected light toward the projection lens,
An auxiliary reflecting surface provided at least on the reflector;
With
The convergent reflective surface and either the additional reflective surface or the auxiliary reflective surface of the reflector are high-reflectivity reflective surfaces,
Either the additional reflective surface or the auxiliary reflective surface of the reflector is a reflective surface with a lower reflectance than the reflective surface with a high reflectance.
A vehicular lamp characterized by the above. The high-reflectivity reflecting surface is made of a metal reflecting film formed on the surface of a part molded at a location where the polishing level of the mold is polished at a high level in the mold,
The low-reflectivity reflective surface is a metal reflective film formed on the surface of a portion formed of a mold where the mold polishing level is polished at a lower level than the high-reflectivity reflective surface. Consist of,
The vehicular lamp according to claim 1. The reflective surface having a high reflectivity is made of a metal reflective film formed without using a mesh filter or using a mesh filter having a large mesh diameter,
The low-reflectivity reflective surface is made of a metal reflective film formed using a mesh filter having a mesh diameter smaller than that of the high-reflectivity reflective surface.
The vehicular lamp according to claim 1. The high-reflectance reflecting surface is composed of a chromium underlayer and a metal reflecting film formed on the surface of the chromium underlayer,
The low-reflectance reflective surface is composed of a metal reflective film formed on the surface of the masked portion when the chromium undercoat film is formed,
The vehicular lamp according to claim 1. The reflective surface with high reflectivity is the convergent reflective surface and the auxiliary reflective surface of the reflector, and is a silver alloy metal reflective film and a protective film formed on the surface of the silver alloy metal reflective film And consists of
The low-reflectance reflective surface is the additional reflective surface of the shade and additional reflector, and includes an aluminum metal reflective film and a protective film formed on the surface of the aluminum metal reflective film.
The vehicular lamp according to claim 1. The high-reflectivity reflective surface is the converging reflective surface and the auxiliary reflective surface of the reflector, and includes an aluminum metal reflective film, and a multilayer reflection film formed on the surface of the aluminum metal reflective film. A protective film,
The low-reflectance reflective surface is the additional reflective surface of the shade and additional reflector, and includes an aluminum metal reflective film and a protective film formed on the surface of the aluminum metal reflective film.
The vehicular lamp according to claim 1.

Images