JP2014146500A - Head light for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the appearance of a conventional vehicle head light.SOLUTION: The invention includes: a lamp housing 2; a lamp lens 3; a light source 4, and a reflector 5. The reflector 5 is composed of: a reflection part 15; and vertical wall parts 11, 12, 13, 14. Pseudo reflection surfaces 10 are provided at the vertical wall parts 11, 12, 13, 14. A light diffusion part 17 and a non light diffusion part 18 are provided on each pseudo reflection surface 10. As a result, the invention improves the appearance.

Description

  The present invention relates to a vehicle headlamp including a reflector.

  This type of vehicle headlamp has been conventionally used (for example, Patent Document 1). Hereinafter, a conventional vehicle headlamp will be described. A conventional vehicle headlamp includes a light source and a reflector, and the reflector includes a reflecting portion, a step portion, and a standing wall portion, and a knurling is provided on the reflecting surface of the standing wall portion. The operation will be described below. When the light source is turned on, most of the light from the light source is reflected as a predetermined light distribution pattern by the reflecting portion of the reflector, and the remainder of the light from the light source is diffusely reflected by the knurls of the reflecting surface of the standing wall portion. Here, a case where no knurling is provided will be described. That is, if the knurling is not provided, the light from the light source is reflected as reflected light that does not contribute to the predetermined light distribution pattern, so that another light distribution pattern is formed in addition to the predetermined light distribution pattern. The light distribution pattern may be noticeable. Therefore, a knurl is provided, and the reflected light that does not contribute to the light distribution pattern is diffused by this knurl, and another light distribution pattern is diffused to make it inconspicuous.

JP 2011-192486 A

  However, since the conventional vehicular headlamp is provided with knurls up to the end portion of the reflecting surface of the standing wall portion, the knurled irregularities can be seen at the end portion of the standing wall portion, which is not preferable in appearance.

  The problem to be solved by the present invention is that the conventional vehicular headlamp is not preferable in appearance.

  This invention (invention concerning Claim 1) is provided with the lamp housing and lamp lens which define a lamp chamber, and the light source and reflector which are arrange | positioned in a lamp chamber, and a reflector is a predetermined light. A surface that has a reflecting surface that reflects to the lamp lens side with a light distribution pattern, and a standing wall portion that extends from the edge of the reflecting portion to the lamp lens side, and faces the light source of the standing wall portion Are provided with a light diffusing portion for diffusing light from the light source on the portion of the pseudo reflecting surface other than the end portion on the lamp lens side of the standing wall portion. It is characterized by that.

  This invention (the invention according to claim 2) is characterized in that the pseudo-reflecting surface of the end portion on the lamp lens side of the standing wall portion where no light diffusing portion is provided has a curved surface.

  The vehicle headlamp according to the present invention can diffuse reflected light that does not contribute to the light distribution pattern, which is light from the light source, by the light diffusing portion provided on the pseudo-reflecting surface of the standing wall. The light distribution pattern can be made inconspicuous by diffusing. Moreover, the vehicle headlamp of the present invention (the invention according to claim 1) is provided with no light diffusing portion at the end portion on the lamp lens side of the standing wall portion of the pseudo reflection surface, that is, the pseudo reflection surface. Of these, the end portion on the lamp lens side of the standing wall portion is a non-light diffusing portion. For this reason, since a light-diffusion part cannot be seen in the edge part of a standing wall part, appearance can be improved.

FIG. 1 is a longitudinal sectional view (vertical sectional view) showing Embodiment 1 of a vehicle headlamp according to the present invention. FIG. 2 is a front view of the reflector showing the optical path in the standing wall portion of the reflector (a view taken along arrow II in FIG. 1). FIG. 3 is an enlarged explanatory view of a part of the reflector showing an optical path in the standing wall portion of the reflector. FIG. 4 is an enlarged cross-sectional view (an enlarged cross-sectional view taken along line IV-IV in FIG. 3) showing a part of the standing wall portion of the reflector. FIG. 5 is an explanatory diagram showing a light distribution pattern irradiated on the road surface. FIG. 6 is an explanatory view of a road surface illumination light distribution pattern showing Embodiment 2 of the vehicle headlamp according to the present invention. FIG. 7 is an enlarged cross-sectional view of a part of the standing wall portion of the reflector showing the vehicle headlamp according to the third embodiment of the present invention.

  Hereinafter, three examples of embodiments (examples) of a vehicle headlamp according to the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by this embodiment. “0 m” and “5 m” in FIGS. 5 and 6 indicate the distance from the vehicle headlamp 1 mounted on the vehicle C to the road surface.

(Description of Configuration of Embodiment 1)
1 to 5 show Embodiment 1 of a vehicle headlamp according to the present invention. Hereinafter, the configuration of the vehicle headlamp in the first embodiment will be described. In the figure, reference numeral 1 denotes a vehicle headlamp (for example, a headlamp or a fog lamp) in the first embodiment. The vehicle headlamp 1 is mounted on both the left and right sides of the front portion of the vehicle C, respectively.

  As shown in FIG. 1, the vehicle headlamp 1 includes a lamp housing 2, a lamp lens 3, a light source 4, a reflector 5, and an optical axis adjustment mechanism 6. The lamp housing 2 and the lamp lens 3 define a lamp chamber 7. The light source 4 and the reflector 5 are disposed in the lamp chamber 7. The light source 4 and the reflector 5 are attached to the lamp housing 2 via the optical axis adjusting mechanism 6 so that the optical axis can be adjusted.

  In this example, the light source 4 is a discharge lamp such as a high-pressure metal vapor discharge lamp such as a metal halide lamp or a high-intensity discharge lamp (HID). The light source 4 is detachably attached to the reflector 5 via a socket 8 or the like. The light source 4 may be a semiconductor light source such as a halogen bulb, an incandescent bulb, or an LED other than the discharge lamp.

  The reflector 5 is made of a heat-resistant resin member, for example, BMC (glass fiber reinforced thermosetting plastic as a bulk molding material). The reflector 5 has a hollow concave shape that is open on the front side (light irradiation direction side of the vehicle headlamp 1) and closed on the rear side. The inner concave surface of the reflector 5 is subjected to aluminum vapor deposition or silver coating, and a reflective surface 9 and a pseudo reflective surface 10 are formed.

  The reflector 5 includes a reflecting portion 15 having the reflecting surface 9 that reflects light (not shown) from the light source 4 to the lamp lens 3 side with a predetermined light distribution pattern P, and an edge of the reflecting portion 15. In the example, it is composed of standing wall portions 11, 12, 13, and 14 extending from the entire periphery to the lamp lens 3 side.

  As shown in FIGS. 1 to 4, the reflecting portion 15 has a part of a substantially parabolic shape. The standing wall portions 11, 12, 13, and 14 have a plate shape and surround the four sides of the reflecting portion 15, that is, the right side, the upper side, the left side, and the lower side. Thereby, the reflector 5 can be reduced in size. A through hole 16 is provided in a substantially central portion of the reflecting portion 15. The light source 4 is inserted into the through hole 16.

  The reflecting surface 9 of the reflecting portion 15 reflects light emitted from the light source 4 toward the lamp lens 3 side. The reflective surface 9 is a free curved surface (NURBS curved surface).

  The pseudo-reflecting surface 10 is provided on the surface of the standing wall portions 11, 12, 13, 14 facing the light source 4. Of the pseudo-reflecting surface 10, the pseudo-reflecting surface 10 other than the end portions of the standing wall portions 11, 12, 13, 14 on the lamp lens 3 side has light L 1, L 2, L 3 from the light source 4. , L4 is provided as a light diffusing unit that diffuses L4 as diffusely reflected light L10, L20, L30, and L40.

  The knurled 17 has a direction in which small curved irregularities intersect with the front-rear direction of the vehicle C (the light reflection direction of the reflection surface 9 and the optical axis direction of the reflection surface 9). Direction) and the unevenness extends in the front-rear direction of the vehicle C.

  End portions on the lamp lens 3 side of the standing wall portions 11, 12, 13, 14 where the knurling 17 is not provided, that is, the pseudo-reflecting surface 10 of the non-light diffusing portion 18 has a curved surface.

(Description of the operation of the first embodiment)
The vehicle headlamp 1 according to the first embodiment is configured as described above, and the operation thereof will be described below.

  The light source 4 is turned on. Then, most of the light emitted from the light source 4 is reflected to the lamp lens 3 side by the reflecting surface 9 of the reflector 5. The reflected light passes through the lamp lens 3 as a predetermined light distribution pattern P and is irradiated to the front of the vehicle C and the road surface.

  Further, most of the remaining light emitted from the light source 4 (light from the light source 4) L1, L2, L3, and L4 is a knurl 17 of the pseudo-reflecting surface 10 of the upright wall portions 11, 12, 13, and 14 of the reflector 5. Thus, the diffusely reflected light is diffusely reflected as L10, L20, L30, and L40.

  That is, as shown in FIG. 5, the diffusely reflected light L10 diffusely reflected by the knurls 17 of the pseudo-reflecting surface 10 of the right standing wall 11 is applied to the left road surface (sidewall, guardrail, etc.) of the predetermined light distribution pattern P. Irradiated as another light distribution pattern P10 diffused in the direction of the arrow.

  The diffusely reflected light L20 diffusely reflected by the knurls 17 of the pseudo-reflecting surface 10 of the upper standing wall portion 12 is diffused in the direction of the arrow on the lower (near side) road surface (side wall, guardrail, etc.) of the predetermined light distribution pattern P. Irradiated as another light distribution pattern P20.

  The diffusely reflected light L30 diffusely reflected by the knurl 17 of the pseudo-reflecting surface 10 of the left standing wall 13 is another distribution diffused in the direction of the arrow on the right road surface (sidewall, guardrail, etc.) of the predetermined light distribution pattern P. Irradiated as a light pattern P30.

  The diffusely reflected light L40 diffusely reflected by the knurl 17 of the pseudo-reflecting surface 10 of the lower standing wall portion 14 is used as another light distribution pattern (not shown) diffused above the predetermined light distribution pattern P. Irradiated.

  Further, light from the light source 4 (most of the remaining light emitted from the light source 4) L 1, L 2, L 3, L 4 is non-light of the pseudo-reflecting surface 10 of the standing wall portions 11, 12, 13, 14 of the reflector 5. The light is diffusely reflected as diffusely reflected light L11 on the curved surface of the diffuser 18.

  That is, as shown in FIG. 5, the diffusely reflected light L11 diffusely reflected on the curved surface of the non-light diffusing portion 18 of the pseudo-reflecting surface 10 of the right standing wall portion 11 is the left road surface (side wall) of the predetermined light distribution pattern P. , A guard rail, etc.) is irradiated as another light distribution pattern P11 diffused in the direction of the arrow.

  Diffuse reflected light (not shown) diffusely reflected on the curved surface of the non-light diffusing portion 18 of the pseudo-reflecting surface 10 of the upper standing wall portion 12 is a road surface (side wall) on the lower side (front side) of the predetermined light distribution pattern P. , A guard rail, etc.) is irradiated as another light distribution pattern P21 diffused in the arrow direction.

  Diffuse reflected light (not shown) diffused and reflected on the curved surface of the non-light diffusing portion 18 of the pseudo-reflecting surface 10 of the left standing wall portion 13 is applied to the right road surface (sidewall, guardrail, etc.) of the predetermined light distribution pattern P. Irradiated as another light distribution pattern P31 diffused in the direction of the arrow.

  The diffuse reflected light (not shown) diffused and reflected on the curved surface of the non-light diffusing portion 18 of the pseudo-reflecting surface 10 of the lower standing wall portion 14 is further diffused above the predetermined light distribution pattern P. Irradiated as a light distribution pattern (not shown).

(Description of the effect of Embodiment 1)
The vehicle headlamp 1 according to the first embodiment is configured and operated as described above, and the effects thereof will be described below.

  The vehicle headlamp 1 according to the first embodiment includes light L 1, L 2 from the light source 4 by a knurl 17 serving as a light diffusing unit provided on the pseudo-reflecting surface 10 of the standing walls 11, 12, 13, 14. Reflected light that is L3 and L4 and does not contribute to the predetermined light distribution pattern P can be diffused as diffuse reflected light L10, L20, L30, and L40, and another light distribution pattern P10, P20, and P30 is diffused. It can be inconspicuous and does not interfere with the driver's view.

  Moreover, the vehicular headlamp 1 according to the first embodiment is provided with a knurl 17 as a light diffusing portion at the end portion on the lamp lens 3 side of the standing wall portions 11, 12, 13, 14 of the pseudo-reflecting surface 10. That is, the end portions of the upright wall portions 11, 12, 13, and 14 on the lamp lens 3 side of the pseudo-reflecting surface 10 are the non-light diffusing portions 18. For this reason, since the unevenness | corrugation of the knurl 17 as a light-diffusion part cannot be seen in the edge part of the standing wall parts 11, 12, 13, and 14, appearance can be improved.

  In particular, the vehicular headlamp 1 according to the first embodiment includes the pseudo-reflecting surface 10 at the end portion on the lamp lens 3 side of the standing wall portions 11, 12, 13, and 14 that are not provided with the knurling 17 as the light diffusion portion, that is, Since the non-light diffusing portion 18 has a curved surface, the light L1, L2, L3, L4 from the light source 4 is diffused and reflected by the non-light diffusing portion 18 having a curved surface. For this reason, even if the knurling 17 as the light diffusing portion is not provided on the pseudo-reflecting surface 10 at the end portion of the standing wall portions 11, 12, 13, 14 on the lamp lens 3 side, it contributes to the predetermined light distribution pattern P. The reflected light that has not been diffused can be diffused as diffusely reflected light L11, and the other light distribution patterns P11, P21, and P31 can be diffused to be unobtrusive and do not hinder the driver's view.

(Description of the configuration and effect of the second embodiment)
FIG. 6 shows Embodiment 2 of the vehicle headlamp according to the present invention. In the figure, the same reference numerals as those in FIGS. 1 to 5 denote the same components. Hereinafter, the vehicle headlamp according to the second embodiment will be described.

  The vehicular headlamp 1 according to the first embodiment includes the pseudo-reflecting surface 10 at the end portion on the lamp lens 3 side of the standing wall portions 11, 12, 13, and 14 that are not provided with the knurling 17 as the light diffusing portion, that is, the nothing. The light diffusing unit 18 has a curved surface. On the other hand, the vehicular headlamp according to the second embodiment is a pseudo-reflecting surface at the end portion on the lamp lens 3 side of the standing wall portions 11, 12, 13, and 14 where the knurling 17 as the light diffusing portion is not provided. 10, that is, the non-light diffusing portion 18 is a flat surface.

  Since the vehicle headlamp according to the second embodiment is configured as described above, as shown in FIG. 6, in the plane of the non-light diffusing portion 18 of the pseudo-reflecting surface 10 of the standing wall portions 11, 12, 13, and 14. The reflected light that has been reflected is emitted as other light distribution patterns P1, P2, and P3 that are not diffused on the left, lower, and right road surfaces (side walls, guardrails, etc.) of the predetermined light distribution pattern P. The light distribution patterns P1, P2, and P3 of the second embodiment are slightly diffused because they are not diffused compared to the other light distribution patterns P10, P20, and P30 of the first embodiment. Because the amount of light is small, it is not so noticeable.

(Description of the configuration and effect of the third embodiment)
FIG. 7 shows Embodiment 3 of the vehicle headlamp 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 vehicle headlamp in the third embodiment will be described.

  The vehicular headlamp 1 according to the first and second embodiments uses a knurl 17 as a light diffusion portion. On the other hand, the vehicular headlamp according to the third embodiment uses a texture (small unevenness) 19 as a light diffusion portion. That is, a portion other than the non-light diffusing portion 18 in the pseudo-reflecting surface 10 is slightly lower than the non-light diffusing portion 18 to provide the texture 19.

  Since the vehicle headlamp according to the third embodiment is configured as described above, it is possible to achieve substantially the same operational effects as the operational effects of the vehicle headlamp 1 according to the first and second embodiments.

(Description of examples other than Embodiments 1, 2, and 3)
In the first, second, and third embodiments, the standing wall portions 11, 12, 13, and 14 are provided on the entire periphery of the reflecting portion 15. However, in this invention, you may provide a standing wall part in a part of edge of a reflection part.

  In the first, second, and third embodiments, the standing wall portions 11, 12, 13, and 14 surround the four sides of the reflecting portion 15. That is, the front view shapes of the standing wall portions 11, 12, 13, and 14 are substantially quadrangular. However, in the present invention, as long as the shape of the standing wall portion viewed from the front surrounds the reflecting portion, the shape may be substantially other than a quadrangle. For example, as in Patent Document 1, the front-view shape of the standing wall portion may be an elliptical shape, or a part may be an arc (curve) shape and a part may be a linear shape.

  Further, in the first and third embodiments, the curved non-light diffusing portion 18 is provided on all the end portions of the standing wall portions 11, 12, 13, and 14. However, in the present invention, the curved non-light diffusing portion 18 may be provided in a part of the end portion of the standing wall portion. That is, in the case of another light distribution pattern that is not conspicuous and does not hinder the driver's field of view, a curved non-light diffusion portion 18 is provided in the non-light diffusion portion of the standing wall portion that forms the other light distribution pattern. It does not have to be.

DESCRIPTION OF SYMBOLS 1 Vehicle headlamp 2 Lamp housing 3 Lamp lens 4 Light source 5 Reflector 6 Optical axis adjustment mechanism 7 Lamp chamber 8 Socket 9 Reflecting surface 10 Pseudo-reflecting surface 11 Right standing wall portion 12 Upper standing wall portion 13 Left standing wall portion 14 Below Side wall part 15 Reflecting part 16 Through hole 17 Knurled (light diffusion part)
18 Non-light diffusion part 19 Wrinkle (light diffusion part)
C Vehicle P Predetermined light distribution pattern L1, L2, L3, L4 Light from light source L10, L11, L20, L30, L40 Diffuse reflected light P1, P2, P3, P10, P20, P30, P11, P21, P31 Light distribution pattern

Claims (2)

A lamp housing and a lamp lens defining a lamp chamber;
A light source and a reflector disposed in the lamp chamber;
With
The reflector includes a reflecting portion having a reflecting surface that reflects light from the light source to the lamp lens side in a predetermined light distribution pattern, and a standing wall portion that extends from the edge of the reflecting portion to the lamp lens side. Consists of
The surface facing the light source of the standing wall portion is provided with a pseudo-reflecting surface,
Of the pseudo-reflecting surface, a light diffusing portion for diffusing light from the light source is provided on the pseudo-reflecting surface of the standing wall portion other than the end portion on the lamp lens side,
A vehicle headlamp characterized by that. The pseudo-reflecting surface of the end portion on the lamp lens side of the standing wall portion where the light diffusion portion is not provided has a curved surface.
The vehicle headlamp according to claim 1.

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