JP2007227240A - Vehicular lamp - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular lamp capable of providing a main light distribution pattern having sufficient luminous energy without degrading the luminous energy of the main light distribution pattern formed from light reflected from main reflecting surfaces. <P>SOLUTION: Second sub reflecting surfaces 11L and 11R are arranged at positions without disturbing emission of light reflected from the main reflecting surfaces 7. As a result, a low-beam light distribution pattern LP having sufficient luminous energy can be provided without degrading the luminous energy of the low-beam light distribution pattern LP as the main light distribution pattern formed from the light reflected from the main reflecting surface 7. In addition, since light L1 normally becoming useless can be utilized, the luminous energy of the light distribution can be increased. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicular lamp such as a headlamp, a fog lamp, or a swivel lamp that irradiates light on the front or side of a vehicle to illuminate the road surface on the front or side of the vehicle. In particular, the present invention relates to a vehicular lamp that can effectively use direct light from a light source.

  This type of vehicular lamp is conventionally known (for example, Patent Document 1). Hereinafter, a conventional vehicle lamp will be described. A conventional vehicular lamp is composed of a light source, a main reflection surface, an elliptical first sub-reflection surface, and a second sub-reflection surface. When the light source is turned on, the light from the light source is reflected by the main reflecting surface, and the reflected light from the main reflecting surface is irradiated to the outside. In addition, light from the light source is reflected by the first sub-reflection surface, reflected light from the first sub-reflection surface is reflected by the second sub-reflection surface, and reflected light from the second sub-reflection surface is irradiated to the outside. Is done. A conventional vehicular lamp can meet the demand for a strong slant and can obtain a sufficient amount of light.

  However, in the conventional vehicular lamp, the second sub-reflecting surface is disposed at a position where the second reflecting surface prevents the reflected light from being irradiated from the main reflecting surface, that is, within the irradiation direction (irradiation range) of the reflected light from the main reflecting surface. . For this reason, the conventional vehicle lamp has the subject that the light quantity of the main light distribution pattern formed from the reflected light from a main reflective surface falls.

JP 2002-33010 A

  The problem to be solved by the present invention is that the light quantity of the main light distribution pattern is reduced in the conventional vehicular lamp.

  The present invention (the invention according to claim 1) is characterized in that the second sub-reflecting surface is arranged at a position that does not hinder the irradiation of the reflected light from the main reflecting surface.

  Further, the present invention (the invention according to claim 2) is characterized in that the second sub-reflecting surface is provided in a shade disposed at a position that does not hinder the irradiation of the reflected light from the main reflecting surface. .

  Furthermore, the present invention (the invention according to claim 3) is characterized in that the second sub-reflecting surface is provided in a portion of the main reflector other than the main reflecting surface.

  Furthermore, the present invention (the invention according to claim 4) is characterized in that the second sub-reflection surface is disposed at or near the second focal point of the first sub-reflection surface.

  Furthermore, the present invention (the invention according to claim 5) is characterized in that the second sub-reflecting surface has a two-divided structure in which the optical axis is directed to the left and right respectively.

  Furthermore, the present invention (the invention according to claim 6) is characterized in that the main reflector and the sub-reflector form an integral structure.

  Furthermore, the present invention (the invention according to claim 7) is characterized in that the sub-reflector is disposed at a position that does not hinder the irradiation of the reflected light from the main reflecting surface.

  In the vehicular lamp of the present invention (the invention according to claim 1), the second sub-reflecting surface is disposed at a position that does not hinder the irradiation of the reflected light from the main reflecting surface. For this reason, the vehicular lamp of the present invention (the invention according to claim 1) has a main light distribution with a sufficient light amount without reducing the light amount of the main light distribution pattern formed from the reflected light from the main reflection surface. A pattern is obtained. Moreover, in the vehicular lamp of the present invention (the invention according to claim 1), in the first sub-reflecting surface based on the ellipsoidal surface, the second focal point is located closer to the light irradiation direction side of the main reflecting surface than the first focal point. To do. For this reason, the vehicular lamp of the present invention (the invention according to claim 1) reflects the reflected light from the first sub-reflecting surface on the second sub-reflecting surface, and in a predetermined direction with a predetermined sub-light distribution pattern. When irradiating, it is possible to prevent the irradiation of the sub-light distribution pattern from being shielded as much as possible by the left and right side walls of the main reflecting surface or parts equivalent to the side walls. It is suitable for running on a curved road at night.

  The vehicular lamp of the present invention (the invention according to claim 2) is provided in a shade in which the second sub-reflecting surface is disposed at a position that does not hinder the irradiation of reflected light from the main reflecting surface. For this reason, the vehicular lamp according to the present invention (the invention according to claim 2) has a main light distribution formed from the reflected light from the main reflecting surface, similarly to the vehicular lamp according to the first aspect of the invention. A main light distribution pattern having a sufficient light amount can be obtained without reducing the light amount of the pattern. In addition, in the vehicular lamp of the present invention (the invention according to claim 2), the second focal point is located closer to the light irradiation direction side of the main reflective surface than the first focal point in the first sub-reflecting surface based on the elliptical surface. To do. For this reason, the vehicular lamp of the present invention (the invention according to claim 2) reflects the reflected light from the first sub-reflecting surface on the second sub-reflecting surface, and in a predetermined direction with a predetermined sub-light distribution pattern. When irradiating, it is possible to prevent the irradiation of the sub-light distribution pattern from being shielded as much as possible by the left and right side walls of the main reflecting surface or parts equivalent to the side walls. It is suitable for running on a curved road at night. In addition, in the vehicular lamp of the present invention (the invention according to claim 2), since the second sub-reflecting surface is provided on the shade, parts for providing the second sub-reflecting surface can be omitted. The number of parts can be reduced, and the manufacturing cost can be reduced.

  In the vehicular lamp of the present invention (the invention according to claim 3), the second sub-reflecting surface is provided in a portion of the main reflector other than the main reflecting surface. For this reason, the vehicular lamp of the present invention (the invention according to claim 3) is similar to the vehicular lamp of the inventions according to claims 1 and 2, and is formed from the reflected light from the main reflecting surface. A main light distribution pattern having a sufficient light amount can be obtained without reducing the light amount of the light distribution pattern. In addition, in the vehicular lamp of the present invention (the invention according to claim 3), the second focal point is located closer to the light irradiation direction side of the main reflective surface than the first focal point in the first sub-reflecting surface based on the elliptical surface. To do. To this end, the vehicular lamp according to the present invention (the invention according to claim 3) reflects the reflected light from the first sub-reflecting surface on the second sub-reflecting surface, and in a predetermined direction with a predetermined sub-light distribution pattern. When irradiating, it is possible to prevent the irradiation of the sub light distribution pattern from being shielded as much as possible by the left and right side walls of the main reflecting surface or parts equivalent to the side walls. It is suitable for running on a curved road at night. In addition, in the vehicular lamp of the present invention (the invention according to claim 3), since the second sub-reflecting surface is provided on the main reflector, the components for providing the second sub-reflecting surface can be omitted. Therefore, the number of parts can be reduced, and the manufacturing cost can be reduced.

  Furthermore, in the vehicular lamp of the present invention (the invention according to claim 4), the second sub-reflecting surface is disposed at or near the second focal point of the first sub-reflecting surface. For this reason, the vehicular lamp according to the present invention (the invention according to claim 4) is reflected light from the first sub-reflecting surface, and is condensed from the second focal point or diffused from the second focal point. Since the starting light can be efficiently reflected by the second sub-reflection surface, the sub-light distribution pattern can be efficiently controlled.

  Furthermore, the vehicular lamp according to the present invention (the invention according to claim 5) has a two-divided structure in which the second sub-reflecting surface has the optical axis facing left and right outward. For this reason, since the vehicular lamp according to the present invention (the invention according to claim 5) can arrange the sub light distribution patterns from the left and right ends of the main light distribution pattern to the outside, Visibility can be improved and it can contribute to traffic safety.

  Furthermore, in the vehicular lamp according to the present invention (the invention according to claim 6), the main reflector and the sub-reflector form an integral structure. For this reason, the vehicular lamp of the present invention (the invention according to claim 6) can reduce the number of parts, reduce the manufacturing cost, and can be made compact.

  Furthermore, in the present invention (invention according to claim 7), the vehicular lamp is arranged at a position where the sub-reflector does not hinder the irradiation of the reflected light from the main reflecting surface. For this reason, the vehicular lamp according to the present invention (the invention according to claim 7) is formed from the reflected light from the main reflecting surface in the same manner as the vehicular lamp according to the first, second, and third inventions. A main light distribution pattern having a sufficient light amount can be obtained without reducing the light amount of the main light distribution pattern.

  Hereinafter, three examples of embodiments of a vehicular lamp according to the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.

  In the drawings, the symbol “F” indicates the front or front side of the automobile (vehicle) (the forward direction side of the automobile). The symbol “B” indicates the rear side of the automobile. Reference sign “U” indicates an upper side of the front side as viewed from the driver side. The symbol “D” indicates the lower side when the front side is viewed from the driver side. The symbol “L” indicates the left side when the front side is viewed from the driver side. The symbol “R” indicates the right side when the front side is viewed from the driver side. The symbol “VU-VD” indicates vertical lines on the top and bottom of the screen. Reference sign “HL-HR” indicates horizontal lines on the left and right of the screen.

  1 to 5 show Example 1 of a vehicular lamp according to the present invention. Hereinafter, the configuration of the vehicular lamp according to the first embodiment will be described.

  In the figure, reference numeral “1” denotes a vehicular lamp according to the first embodiment. In this example, the vehicular lamp 1 is, for example, an automobile headlamp, and a predetermined main light distribution pattern is a passing light distribution pattern LP as shown in FIG.

  The vehicle lamp 1 includes a light source 2, a main reflector 3 and a sub reflector 4, and a shade 5. The vehicular lamp 1 (head lamp unit) has an optical axis adjusting device in a lamp chamber (not shown) defined by a lamp housing (not shown) and a lamp lens (not shown) such as a transparent outer lens. It arrange | positions so that an optical axis can be adjusted via (not shown).

  The main reflector 3 has a shape in which a front side is opened and a rear side, an upper side, a lower side, a left side, and a right side are closed. A through hole 6 through which the light source 2 is inserted is provided in the center of the rear part of the main reflector 3. The inner concave surface of the main reflector 3 is subjected to aluminum vapor deposition or silver coating, for example, and a free-form main reflection surface 7 based on a paraboloid is provided.

  The main reflecting surface 7 has a focal point F and an optical axis ZZ. The free curved surface (NURBS curved surface) of the main reflecting surface 7 is a NURBS free curved surface (Non-Uniform Rational B-Spline) described in "Mathematical Elemennts for Computer Graphics" (Devid F. Rogers, J Alan Adams). Surface). The main reflecting surface 7 is composed of a plurality of segments (blocks). In FIG. 2, the boundary lines of the plurality of segments of the main reflecting surface 7 are shown. However, in the case of a series of segments (when the segments are continuously formed), the boundary of the segments can be seen. There may not be. The number of segments of the main reflecting surface 7 is not particularly limited. One may be sufficient. The main reflection surface 7 reflects the light from the light source 2 and irradiates it in a predetermined direction, that is, in front of the automobile, with a predetermined main light distribution pattern, that is, a passing light distribution pattern LP shown in FIG.

  The light source 2 is, for example, a discharge lamp (a high-pressure metal vapor discharge lamp such as a metal halide lamp, a high-intensity discharge lamp (HID), etc.), a halogen bulb, or an incandescent bulb. The light source 2 is detachably attached to the main reflector 3 via a socket mechanism 8. The light emitting portion of the light source 2 (a discharge arc in the case of a discharge lamp, or a filament in the case of a halogen bulb or an incandescent bulb) is located at or near the focal point F of the main reflecting surface 7. As a result, the light radiated from the light emitting part of the light source 4 is reflected by the main reflecting surface 7 to the front side of the automobile substantially parallel to the optical axis ZZ.

  The shade 5 is attached to the edge of the through hole 6 of the main reflector 3. The shade 5 is disposed at a position that does not hinder the irradiation of the reflected light from the main reflecting surface 7. Furthermore, the shade 5 is light that is emitted from the light source 2 and directly emitted to the outside, and shields light that becomes stray light without being subjected to light distribution control by the main reflection surface 7. Openings 9 are provided in the upper part of the intermediate part of the shade 5 and in the left and right side parts. Due to the opening 9, the shade 5 does not interfere with the light from the light source 2 entering the main reflecting surface 7.

  The sub-reflector 4 has a shape of a part of a spheroid (ellipse indicated by a two-dot chain line in FIG. 1). The sub-reflector 4 is disposed at a position on the upper front side with respect to the light source 2, the main reflector 3, and the shade 5, and at a position that does not interfere with irradiation of reflected light from the main reflecting surface 7. ing. Further, the sub-reflector 4 has an integral structure with the main reflector 3. The inner concave surface of the sub-reflector 4 is provided with a first sub-reflecting surface 10 based on an elliptical surface, which is subjected to aluminum vapor deposition or silver coating.

  The first sub-reflecting surface 10 has a first focal point F1 and a second focal point F2. The first focal point F1 is located at the light emitting part of the light source 2 or the focal point F of the main reflecting surface 7 or in the vicinity thereof. The second focal point F2 is located on the light irradiation direction side of the main reflecting surface 7, that is, on the front side with respect to the first focal point F1. As shown in FIG. 1, the first sub-reflecting surface 10 is a light other than the light reflected by the main reflecting surface 7 and the light shielded by the shade 5 among the light from the light emitting part of the light source 2. L1 (see the solid line arrow in FIG. 1) is reflected. That is, the light L1 is direct light that is emitted from the light emitting unit of the light source 2 to the upper front side, and is normally invalid light.

  Of the outer surface of the shade 5, the left and right side surfaces obliquely above the front are subjected to aluminum vapor deposition or silver coating, for example, second sub-reflection surfaces 11L and 11R based on a paraboloid are provided. Yes. On the other hand, the inner surface of the shade (that is, the surface facing the light source 2) is provided with, for example, black matte (not shown), and the light reflectance is substantially zero.

  The second sub reflective surfaces 11L and 11R have a common focal point F0 and respective optical axes ZL-ZL and ZR-ZR. The second sub reflective surfaces 11L and 11R are disposed in the vicinity of the second focal point F2 of the first sub reflective surface 10. That is, the focal point F0 of the second sub-reflecting surface 11 is located at or near the second focal point F2 of the first sub-reflecting surface 10. Further, as shown in FIG. 3, the second sub-reflecting surfaces 11L and 11R have a two-divided structure in which the optical axes ZL-ZL and ZR-ZR face the left and right sides, respectively. The second sub-reflecting surfaces 11L and 11R reflect the reflected light L2 (see solid line arrows in FIG. 1) from the first sub-reflecting surface 10 and are shown in FIG. 4 by the reflected lights L3L and L3R. The predetermined sub-light distribution patterns SPL and SPR are irradiated in a predetermined direction, that is, from the left and right ends of the passing light distribution pattern LP to the outside.

  The first sub-reflecting surface 10 and the second sub-reflecting surfaces 11L and 11R may be free-form reflecting surfaces like the main reflecting surface 7.

  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 emitting part of the light source 2 of the vehicular lamp 1 is turned on. Then, the light from the light emitting part of the light source 2 passes through the opening 9 of the shade 5 and enters the main reflecting surface 7 and is reflected by the main reflecting surface 7 substantially in parallel with the optical axis ZZ. As shown in FIG. 4, this reflected light is irradiated in front of the automobile with a passing light distribution pattern LP as a predetermined main light distribution pattern.

  Further, light that is emitted from the light emitting unit of the light source 2 and is directly emitted to the outside and becomes stray light without being subjected to light distribution control by the main reflection surface 7 is shielded by the shade 5.

  Furthermore, light L1 other than the light reflected by the main reflecting surface 7 and the light shielded by the shade 5 among the light from the light emitting part of the light source 2 (direct light emitted from the light emitting part of the light source 2 to the front upper side). Light that is normally invalid) passes through the opening 9 of the shade 5 and enters the sub first reflecting surface 10, and is reflected by the sub first reflecting surface 10 toward the second sub reflecting surfaces 11L and 11R. Is done.

  The reflected light L2 reflected by the first sub-reflecting surface 10 passes through the second focal point F2 of the first sub-reflecting surface 10 and enters the sub-second reflecting surfaces 11L and 11R, and as shown in FIG. The sub second reflecting surfaces 11L and 11R are reflected substantially in parallel with the optical axes ZL-ZL and ZR-ZR. As shown in FIG. 4, the reflected lights L3L and L3R are irradiated in a predetermined direction, that is, from the left and right ends of the passing light distribution pattern LP to the outside in predetermined sub light distribution patterns SPL and SPR. Thus, since the vehicular lamp 1 according to the first embodiment effectively uses the light L1 that is normally disabled, the amount of light emitted to the outside can be increased.

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

  The vehicular lamp 1 according to the first embodiment is provided on a shade 5 in which the second sub-reflecting surfaces 11L and 11R are arranged at positions where the irradiation of the reflected light from the main reflecting surface 7 is not hindered. For this reason, the vehicular lamp 1 according to the first embodiment is sufficient without reducing the light quantity of the main light distribution pattern formed from the reflected light from the main reflection surface 7, that is, the passing light distribution pattern LP. A light distribution pattern LP for passing with a sufficient amount of light can be obtained.

  Moreover, in the vehicular lamp 1 according to the first embodiment, in the first sub-reflecting surface 10 based on the ellipsoidal surface, as shown in FIG. 5, the second focal point F2 is the main reflecting surface 7 rather than the first focal point F1. It is located on the light irradiation direction side, that is, on the front side of the automobile. For this reason, the vehicular lamp 1 according to the first embodiment reflects the reflected light L2 from the first sub-reflecting surface 10 by the second sub-reflecting surfaces 11L and 11R, and uses predetermined sub-light distribution patterns SPL and SPR. When irradiation is performed in a predetermined direction, that is, from the left and right ends of the passing light distribution pattern LP to the outside, the irradiation of the sub light distribution patterns SPL and SPR is performed on the main reflecting surface 7, that is, the left and right side walls 12 of the main reflector 3, or the side walls thereof 12 can be prevented from being shielded as much as possible, and accordingly, the sub-light distribution patterns SPL and SPR can be widely radiated sideways, which is suitable for running on a curved road at night. That is, as shown in FIG. 5, the first sub-reflecting surface 10 is irradiated from the twelfth point F2 (and the focal point F0 of the second sub-reflecting surfaces 11L and 11R) located in front of the first focus F1. The range θ3 in which the light 30 is irradiated outside without being shielded by the left and right side walls 12 of the main reflector 3 is the first focus F1 (and the rear side of the second focus F2) on the first sub-reflection surface 10. The light 10 irradiated from the focal point F) of the main reflecting surface 7 is larger than the range θ1 irradiated outside without being blocked by the left and right side walls 12 of the main reflector 3. The parts equivalent to the side wall 12 are, for example, an inner panel (or an inner panel) disposed between the vehicle lamp 1 (headlamp unit) and the lamp housing according to the first embodiment in the lamp chamber. A housing or an extension, and a part that covers the structure in the lamp chamber so that the structure in the lamp chamber cannot be seen through a lamp lens such as a transparent outer lens.

  In addition, in the vehicular lamp 1 according to the first embodiment, since the second sub-reflecting surfaces 11L and 11R are provided on the shade 5, the components for providing the second sub-reflecting surfaces 11L and 11R can be omitted. Therefore, the number of parts can be reduced, and the manufacturing cost can be reduced.

  In particular, in the vehicular lamp 1 according to the first embodiment, the second sub reflection surfaces 11L and 11R are disposed in the vicinity of the second focal point F2 of the first sub reflection surface 10. For this reason, the vehicular lamp 1 according to the first embodiment reflects the light L2 reflected from the first sub-reflecting surface 10 and starting to diffuse from the second focal point F2 into the second sub-reflecting surfaces 11L and 11R. Therefore, the sub-light distribution patterns SPL and SPR can be controlled efficiently.

  Further, as shown in FIG. 3, the vehicular lamp 1 according to the first embodiment is divided into two parts in which the second sub-reflecting surfaces 11L and 11R have the optical axes ZL-ZL and ZR-ZR facing left and right, respectively. Make a structure. For this reason, in the vehicular lamp 1 according to the first embodiment, the sub light distribution patterns SPL and SPR can be arranged from the left and right ends of the passing light distribution pattern LP as the main light distribution pattern to the outside. In addition, the visibility at the time of traveling on a night road can be improved, which can contribute to traffic safety.

  Further, in the vehicular lamp 1 according to the first embodiment, the main reflector 3 and the sub reflector 4 have an integral structure. For this reason, the vehicular lamp 1 according to the first embodiment can reduce the number of parts, reduce the manufacturing cost, and can be made compact.

  Furthermore, the vehicular lamp 1 according to the first embodiment is disposed at a position where the sub reflector 4 does not hinder the irradiation of the reflected light from the main reflecting surface 7. For this reason, the vehicular lamp 1 according to the first embodiment is sufficient without reducing the light amount of the passing light distribution pattern LP as the main light distribution pattern formed from the reflected light from the main reflection surface 7. A light distribution pattern LP for passing light quantity is obtained.

  6 and 7 show Example 2 of a vehicular lamp according to the present invention. Hereinafter, the vehicular lamp according to the second embodiment will be described. In the figure, the same reference numerals as those in FIGS. 1 to 5 denote the same components.

  In the vehicular lamp 100 according to the second embodiment, the second sub-reflecting surfaces 110 </ b> L and 1110 </ b> R are provided in the portion 13 other than the main reflecting surface 7 in the main reflector 3, that is, the lower portion 13. The second sub-reflecting surfaces 110L and 110R are composed of a free-form surface composed of a plurality of segments, like the main reflecting surface 7. The second sub-reflecting surfaces 110L and 110R reflect the reflected light L2 from the first sub-reflecting surface 10 in the same manner as the second sub-reflecting surfaces 11L and 11R of the first embodiment, and the reflected lights L3L and L4R. Thus, as shown in FIG. 4, irradiation is performed in a predetermined direction, that is, from the left and right end portions of the passing light distribution pattern LP to the outside with predetermined sub-light distribution patterns SPL and SPR.

  The vehicular lamp 100 according to the second embodiment can achieve substantially the same operational effects as the vehicular lamp 1 according to the first embodiment. In particular, in the vehicular lamp 100 according to the second embodiment, since the second sub-reflecting surfaces 110L and 110R are provided on the main reflector 3, components for providing the second sub-reflecting surfaces 110L and 110R can be omitted. Therefore, the number of parts can be reduced, and the manufacturing cost can be reduced.

  In the vehicle lamp 100 according to the second embodiment, the second sub-reflecting surfaces 110L and 1110R are provided in the portion 13 of the main reflector 3 other than the main reflecting surface 7, that is, the lower portion 13. For this reason, the vehicular lamp 100 according to the second embodiment achieves the following effects as compared with the vehicular lamp 1 according to the first embodiment in which the second sub-reflecting surfaces 11L and 11R are provided on the shade 5. can do.

  That is, since the focal point F0 of the second sub-reflective surfaces 110L and 110R (and the second focal point F2 of the first sub-reflective surface 10) can be further positioned on the front side of the automobile, the second sub-reflective surfaces 110L and 110R The reflected light L3L, L3R can be further enlarged (widened) without being shielded by the left and right side walls 12 of the main reflector 3, and the left and right sides of the automobile can be sufficiently illuminated accordingly. can do.

  In addition, since the second sub-reflecting surfaces 110L and 11R provided on the main reflector 3 have a larger area than the second sub-reflecting surfaces 11L and 11R provided on the shade 5, various sub-light distribution patterns can be obtained. be able to.

  In addition, for example, the second sub-reflecting surfaces 110L and 11R provided on the resin main reflector 3 can be formed more accurately than the second sub-reflecting surfaces 11L and 11R provided on the metal shade 5, for example. Therefore, it is possible to control the light distribution of the sub light distribution pattern with high accuracy.

  Furthermore, since the second sub-reflecting surfaces 110L and 11R are provided on the main reflector 3, the shape of the shade 5 is left as it is compared to the second sub-reflecting surfaces 11L and 11R provided on the shade 5. The appearance of the shade 5 is not impaired.

  8 and 9 show a third embodiment of the vehicular lamp according to the present invention. Hereinafter, the vehicular lamp according to the third embodiment will be described. In the figure, the same reference numerals as those in FIGS. 1 to 7 denote the same components.

  In the vehicular lamp 101 according to the third embodiment, the second sub-reflection surface 11C is arranged such that the optical axis ZC-ZC of the second sub-reflection surface 11C is substantially parallel to the optical axis ZZ of the main reflection surface 7. Is configured.

  Since the vehicular lamp 101 according to the third embodiment is configured as described above, the reflected light L2 from the first sub-reflecting surface 10 is reflected, and the reflected light L3C causes a predetermined light as shown in FIG. The sub light distribution pattern SPC is irradiated in a predetermined direction, that is, substantially at the center of the passing light distribution pattern LP.

  Since the vehicular lamp 101 according to the third embodiment is configured and operated as described above, substantially the same effects as the vehicular lamps 1 and 100 according to the first and second embodiments can be achieved.

  In the first, second, and third embodiments, a headlamp that can obtain a passing light distribution pattern LP will be described. However, in the present invention, a headlamp from which a predetermined main light distribution pattern can be obtained, such as a light distribution pattern for highways, a light distribution pattern for traveling, a light distribution pattern for fog, or a light distribution pattern for curved roads. Or it can apply also to vehicle lamps, such as a fog lamp or a swivel lamp.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic longitudinal cross-sectional view (schematic vertical cross-sectional view) which shows Example 1 of the vehicle lamp concerning this invention. Similarly, it is a perspective view which shows the principal part. Similarly, it is explanatory drawing of the optical path of the reflected light which shows the reflective effect | action of a 2nd sub reflection surface. Similarly, it is explanatory drawing which shows the light distribution pattern for passing as a predetermined main light distribution pattern, and a predetermined sub light distribution pattern. Similarly, it is explanatory drawing which shows the irradiation angle range of the reflected light from a 2nd sub-reflection surface. It is a schematic longitudinal cross-sectional view (schematic vertical cross-sectional view) which shows Example 2 of the vehicle lamp concerning this invention. Similarly, it is a perspective view which shows the principal part. It is explanatory drawing of the optical path of the reflected light from the 2nd sub-reflection surface which shows Example 3 of the vehicle lamp concerning this invention. Similarly, it is explanatory drawing which shows the light distribution pattern for passing as a predetermined main light distribution pattern, and a predetermined sub light distribution pattern.

Explanation of symbols

1, 100, 101 Vehicle lamp (head lamp)
2 Light source 3 Main reflector 4 Sub reflector 5 Shade 6 Through hole 7 Main reflecting surface 8 Socket mechanism 9 Opening portion 10 First sub reflecting surface 11L, 11R, 110L, 110R, 11C Second sub reflecting surface 12 Side wall 13 Main reflector main Parts other than the reflective surface F Front (front side)
B Rear (rear side)
U Upper D Lower L Left R Right HL-HR Horizontal horizontal line of screen VU-VD Vertical vertical line of screen Z-Z Optical axis of main reflecting surface ZL-ZL, ZR-ZR, ZC-ZC Second sub-reflection Optical axis of surface F Focus of main reflection surface F1 First focus of first sub reflection surface F2 Second focus of first sub reflection surface F0 Focus of second sub reflection surface LP Light distribution pattern for passing (predetermined main light distribution pattern) pattern)
SPL, SPR, SPC Predetermined sub-light distribution pattern L1 Light that is direct light from the light source and is normally invalid L2 Reflected light from the first sub-reflection surface L3L, L3R, L3C Reflected light from the second sub-reflection surface L10 Irradiated light from the focal point of the main reflecting surface and the first focal point of the first sub-reflecting surface L30 Irradiated light from the second focal point of the first sub-reflecting surface and the focal point of the second sub-reflecting surface θ1 The focal point of the main reflecting surface and the first Irradiation range of irradiation light from the first focus of the sub-reflection surface θ3 Irradiation range of irradiation light from the second focus of the first sub-reflection surface and the focus of the second sub-reflection surface

Claims (7)

In a vehicle lamp that effectively uses direct light from a light source,
The light source;
A main reflection surface that reflects light from the light source and irradiates the light in a predetermined direction with a predetermined main light distribution pattern;
The first focal point is located at or near the light source, and the second focal point is based on an elliptical surface located on the light irradiation direction side of the main reflecting surface with respect to the first focal point. A first sub-reflecting surface that reflects light other than the light reflected by the main reflecting surface;
The second sub is disposed at a position that does not hinder the irradiation of the reflected light from the main reflecting surface, and reflects the reflected light from the first sub reflecting surface to irradiate in a predetermined direction with a predetermined sub light distribution pattern. A reflective surface;
A vehicular lamp characterized by comprising: In a vehicle lamp that effectively uses direct light from a light source,
The light source;
A main reflector and a sub-reflector;
A main reflection surface that is provided on the main reflector and reflects light from the light source to irradiate the light in a predetermined direction with a predetermined main light distribution pattern;
A shade that is disposed at a position that does not hinder the irradiation of reflected light from the main reflecting surface, and that shields light emitted from the light source and emitted directly to the outside;
Provided in the sub-reflector, based on an ellipsoid whose first focal point is located at or near the light source and whose second focal point is located on the light irradiation direction side of the main reflecting surface with respect to the first focal point. And a first sub-reflecting surface that reflects light other than the light reflected by the main reflecting surface and the light shielded by the shade, among the light from the light source,
A second sub-reflection surface that is provided on the shade and reflects the reflected light from the first sub-reflection surface to irradiate in a predetermined direction with a predetermined sub-light distribution pattern;
A vehicular lamp characterized by comprising: In a vehicle lamp that effectively uses direct light from a light source,
The light source;
A main reflector and a sub-reflector;
A main reflection surface that is provided in a part of the main reflector, reflects the light from the light source, and irradiates the light in a predetermined direction with a predetermined main light distribution pattern;
Provided in the sub-reflector, based on an ellipsoid whose first focal point is located at or near the light source and whose second focal point is located on the light irradiation direction side of the main reflecting surface with respect to the first focal point. And a first sub-reflecting surface that reflects light other than the light reflected by the main reflecting surface out of the light from the light source,
A second sub-reflecting surface that is provided in a portion of the main reflector other than the main reflecting surface, and reflects the reflected light from the first sub-reflecting surface and irradiates it in a predetermined direction with a predetermined sub-light distribution pattern. When,
A vehicular lamp characterized by comprising:   The vehicular lamp according to any one of claims 1 to 3, wherein the second sub-reflecting surface is disposed at or near the second focal point of the first sub-reflecting surface.   The vehicular lamp according to any one of claims 1 to 4, wherein the second sub-reflecting surface has a two-divided structure in which the optical axes are directed to the left and right, respectively.   The vehicular lamp according to any one of claims 2 to 5, wherein the main reflector and the sub-reflector form an integral structure.   The vehicular lamp according to any one of claims 2 to 6, wherein the sub-reflector is disposed at a position that does not interfere with irradiation of reflected light from the main reflecting surface.

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