JP2010198857A - Vehicular lighting fixture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicular lighting fixture easily and stably continuing to satisfy a standard required without being influenced by an error in manufacturing or the like. <P>SOLUTION: The vehicular lighting fixture easily and stably continues to satisfy a standard required without being influenced by an error in manufacturing or the like by a projector type lamp unit 2 including a convex lens 4, a reflecting surface 5 having a substantially ellipse shape, and a light source 6 and a reflector type lamp unit 20 including a first reflecting surface 21, a second reflecting surface 22, a light source 9, and a light source adjustment mechanism 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicular lamp that creates a low-beam dedicated light distribution pattern using light emitted from a plurality of lamp units.

  A lamp used for a vehicle headlamp is composed of a plurality of lamp units, and a light distribution pattern dedicated to a low beam is formed by irradiation light from the plurality of lamp units. As such a vehicular lamp, a projector-type lamp unit 2 and a reflector-type lamp unit 3 are provided as a lamp unit like a vehicular lamp 1 shown in FIG. For example, as shown in FIG. 7, the projector-type lamp unit 2 includes a convex lens 4, a substantially elliptical reflecting surface 5, a light source 6 such as halogen or LED, a light shielding plate 7, and the like. The reflector-type lamp unit 3 includes, for example, a substantially paraboloid 8 and a light source 9 using LEDs arranged downward as shown in FIG. 8 (see, for example, Patent Document 1).

  In the vehicular lamp 1 configured as described above, the upper limit referred to as an overhead point within the standard point required by ECE (Economic Commission for Europe) No. 112 is satisfied with a low value of 8 points. In order to make the light distribution pattern 11 as described above, it is conceivable to further provide another projector-type lamp unit 2. For example, as shown in FIG. 9, a pattern 10 that is a main light distribution pattern by the projector-type lamp unit 2, a pattern 11 that reflects the projector-type lamp unit 2 with a different property, and a horizontal line H by the reflector-type lamp unit 3. A pattern 12 extending in the left-right direction is formed on the lower side. The entire light distribution pattern is obtained by overlapping the pattern 10, the pattern 11, and the pattern 12.

JP-A-2005-141919

  However, as shown in FIG. 10, the light distribution of the projector-type lamp unit 2 has a characteristic that the contrast is clear, and therefore, Point 7 (H-7.97L) and Point 8 (H− on the horizontal line H). 4L) and B50R (0.57U-3.43R) standards are very difficult, and the overall light distribution pattern is formed by combining the three light distributions of Pattern 10, Pattern 11, and Pattern 12. However, various problems such as exceeding the standard value occur. In addition, in such a vehicular lamp, if a deviation occurs in the three light distribution positions of the pattern 10, the pattern 11, and the pattern 12 due to a manufacturing defect, the standard of each overhead point cannot be satisfied and a defective product is generated.

  The present invention has been made with respect to such problems, and provides a vehicular lamp that can easily and stably continue to meet the required standards without being affected by manufacturing errors. It is an object.

  In order to achieve the above object, the present invention provides a vehicular lamp in which a low beam distribution pattern is formed by irradiation light of a lamp unit, wherein the lamp unit includes a light source and a first reflecting surface. And a second reflecting surface, wherein the first reflecting surface reflects light emitted in the direction of the optical axis of the light source, and a horizontal diffusing arrangement below the horizontal line. The second reflecting surface is positioned laterally with respect to the optical axis of the light source, and is formed at a peripheral edge of light emitted from the light source toward the first reflecting surface. It is characterized in that it is configured to reflect light and form a light distribution up and down across the horizontal line.

  According to the first aspect of the present invention, the vehicular lamp includes the light source, the reflector-type lamp unit including the first reflecting surface and the second reflecting surface.

  The first reflecting surface is located below the light source by the LED arranged downward, has a focal point near the light source, and has an optical axis in a direction different from the optical axis of the light source, in the optical axis direction of the light source. The emitted light is reflected to form a horizontal diffusion light distribution below the horizontal line.

  The second reflecting surface is positioned above the first reflecting surface that is lateral to the optical axis of the light source, has a focal point near the light source, and has an optical axis in a direction different from the optical axis of the light source. The light at the peripheral edge of the light emitted toward the first reflecting surface is reflected to form a light distribution up and down across the horizontal line.

  With such a configuration, the first reflecting surface forms a diffused light distribution pattern below the horizontal line as in the prior art, and the second reflecting surface has a shape in which the light distribution pattern for satisfying the standard protrudes above the horizontal line. Form. In particular, the light distribution pattern formed by the second reflecting surface is formed with a width within which the standard points of Point 7 (H-7.97L), Point 8 (H-4L), and B50R (0.57U-3.43R) can be sufficiently accommodated. In addition, since the amount of light incident from the light source is small, it is irradiated thinly and uniformly and does not exceed the standard value. As a result, it is possible to continue to satisfy the required standards easily and stably without being influenced by errors during manufacturing.

  The invention according to claim 2 is the invention according to claim 1, wherein the first reflecting surface and the second reflecting surface are substantially parabolic column surfaces, substantially rotating paraboloid surfaces, or paraboloid surfaces. It is characterized by a basic free-form surface.

  According to the invention of claim 2, the first reflecting surface and the second reflecting surface of the reflector-type lamp unit are a substantially parabolic column surface, a substantially rotating parabolic surface, or a free curved surface based on a parabolic surface. Therefore, it is possible to easily form a light distribution pattern that can satisfy the required standard.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the substrate on which the light source is attached is inclined from the horizontal toward the first reflecting surface and the second reflecting surface. It is characterized by being provided.

  According to the invention of claim 3, the light source provided in the reflector type lamp unit changes the positions of the light source, the first reflecting surface and the second reflecting surface by tilting the attached substrate from the horizontal. The amount of light incident on the first reflecting surface and the second reflecting surface is adjusted by changing the incident angle of light from the light source. As a result, the amount of light that can be used by the light source can be improved, and the glare light from the first reflecting surface and the second reflecting surface can be reduced by blocking direct light from the light source by the substrate.

  According to a fourth aspect of the present invention, there is provided the projector-type lamp unit including the convex lens, the light-shielding plate, the light source, and the reflecting surface, and the reflector-type lamp according to the first, second, or third aspect. It is characterized by having a unit.

  According to the invention of claim 4, the main light distribution pattern is formed by the projector type lamp unit, and the light distribution pattern spreading in the left and right direction below the horizontal line by the reflector type lamp unit and the Point 7 (H-7.97L), A light distribution pattern that satisfies the standard points of Point 8 (H-4L) and B50R (0.57U-3.43R) is formed.

  As described above, according to the vehicular lamp of the present invention, a light distribution pattern is formed with a range and a light quantity that sufficiently satisfy the standard by the first reflecting surface and the second reflecting surface of the reflector-type lamp unit, It is possible to continue to meet the required standards easily and stably without being influenced by errors during manufacturing.

The perspective view of the reflector type lamp unit of the vehicle lamp concerning this invention. The front view of a reflector type lamp unit. Sectional drawing of a reflector type lamp unit. The light distribution pattern figure by the vehicle lamp concerning this invention. The figure which compared the light distribution pattern and standard point of the vehicle lamp concerning this invention. The perspective view of a vehicle lamp. Sectional drawing of a projector type lamp unit. Sectional drawing of a reflector type lamp unit. The light distribution pattern figure by the conventional lamp unit. The figure which compared the light distribution pattern of the conventional vehicle lamp, and a standard point.

  Hereinafter, preferred embodiments of a vehicular lamp according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a perspective view of a reflector-type lamp unit of a vehicle lamp according to the present invention, FIG. 2 is a front view of the reflector-type lamp unit, FIG. 3 is a sectional view of the reflector-type lamp unit, and FIG. 4 is a vehicle according to the present invention. FIG. 5 is a diagram comparing light distribution patterns and standard points.

  The vehicular lamp 15 according to the present invention includes a projector-type lamp unit 2 and a reflector-type lamp unit 20 as a lamp unit as in the vehicular lamp 1 shown in FIG. 6, thereby forming a low beam light distribution pattern. As shown in FIG. 7, the projector-type lamp unit 2 includes a convex lens 4, a substantially elliptical reflecting surface 5, a light source 6 such as a halogen or LED, a light shielding plate 7, and the like. The projector-type lamp unit 2 a forms a light distribution pattern 10 shown in FIG. 4 as a main light distribution pattern, and the projector-type lamp unit 2 b forms a light distribution pattern 11.

  The reflector type lamp unit 20 includes a first reflecting surface 21, a second reflecting surface 22, a light source 9, and a light source adjusting mechanism 23 as shown in FIG.

  The first reflecting surface 21 is provided below the light source 9 such as one or more LEDs provided downward, and reflects light emitted in the optical axis direction of the light source 9. The first reflecting surface 21 has a focal point in the vicinity of the light source 9, and is a substantially parabolic column surface and a substantially rotating paraboloid having an optical axis that is directed downward from a horizontal line H that is a direction different from the optical axis of the light source 9. It is formed into a free-form surface based on a surface or a paraboloid.

  Here, the substantially parabolic column surface is a curved surface defined as a collection of points where the distance from the reference plane and the distance from the focal axis parallel to the reference plane (distance in the plane orthogonal to the focal axis) are equal. It is. The substantially rotational paraboloid is a curved surface obtained by rotating a part of the parabola around the rotation axis with the optical axis that is a straight line passing through the focal point orthogonal to the reference line as the rotation axis. A free-form surface based on a paraboloid is not defined in three-dimensional geometry, such as a spheroid, for example. It is a curved surface that has been stepped in a multi-step shape that can be regarded as stepless.

  As shown in FIG. 2, the second reflecting surface 22 is provided above the first reflecting surface 21 on the side of the light source 9, and the light that is emitted from the light source 9 toward the first reflecting surface 21. Reflects light at the periphery. The second reflecting surface 22 is disposed in a gap where the first reflecting surface 21 1 mm to 5 mm below the position of the light source 9 is not provided, and is provided in a range within 20 mm in the lateral width when viewed from the front of the reflecting surface. . The second reflecting surface 22 has a focal point in the vicinity of the light source 9, and is substantially free of light having an optical axis extending from about 2 degrees downward from the horizontal line H, which is a direction different from the optical axis of the light source 9, to about 3 degrees upward. It is formed into a free-form surface based on a parabolic surface, a substantially paraboloid of revolution, or a paraboloid. The light incident on the second reflecting surface 22 from the light source 9 is weak light because the second reflecting surface 22 is away from the optical axis of the light source 9.

  As shown in FIG. 3, in the present embodiment, the second reflecting surface 22 is provided 4 mm downward from a position 1 mm away from the light source 9 and has a left-right width of 20 mm when viewed from the front of the reflecting surface. The second reflecting surface 22 is a parabolic column surface, and the second focal point F2 is located closer to the irradiation direction than the first focal point F1 of the first reflecting surface 21, and the first reflecting surface shown in FIG. Both the light distribution pattern 12 and the light distribution pattern 11 serving as an overhead point, which are directed downward from the horizontal line H formed by the reflective curtain, and the light distribution pattern 26 that is distributed without any gap in the vertical direction are set.

  The light source 9 is attached to the substrate 24, and the substrate 24 is inclined in the direction of arrow A, which is a downward direction in which the first reflecting surface 21 and the second reflecting surface 22 are provided with the socket 25 as the center. In the light source 9 mounted in such an inclination, the direct light from the light source 9 can be cut and the glare light can be reduced when tilted by 5 degrees, and the light utilization efficiency of the light source 9 is 0 degrees when tilted by 10 degrees. It is 10% higher than that at the maximum. In addition, by tilting the substrate 24, it is possible to extend the vertical width of the second reflecting surface long. Thereby, since the light distribution pattern 26 having a vertical width sufficient to overlap both the light distribution pattern 11 and the light distribution pattern 12 can be formed, the second reflective surface can be assembled with a lamp in the manufacturing process. Design with a margin against reaming errors is possible.

  In the vehicular lamp 15 having such a configuration, as shown in FIG. 4, a pattern 10 which is a main light distribution pattern by the projector-type lamp unit 2 and a pattern 11 is formed by reflecting the projector-type lamp unit 2 with different properties. Is done.

  Further, the light distribution pattern of the light distribution pattern 12 is formed by the first reflection surface 21 of the reflector type lamp unit 20, and the light distribution pattern of the light distribution pattern 26 is formed by the second reflection surface 22. Since the optical axis of the first reflecting surface 21 is positioned so as to be lower than the horizontal line H, the irradiation range by the first reflecting surface 21 is above the horizontal line H as in the light distribution pattern 12 shown in FIG. The light distribution pattern is wide and diffused horizontally due to the shape of the reflecting surface.

  The light distribution pattern 26 by the second reflecting surface 22 satisfies the standard point values of Point 7 (H-7.97L), Point 8 (H-4L), and B50R (0.57U-3.43R) determined by ECE No112. As a light distribution pattern for this purpose, as shown in FIG. 4, it is formed in a shape that protrudes upward so as to increase the irradiation range on the upper side across the horizontal line H. As shown in FIG. 5, the light distribution pattern 26 is formed with a width from about 2 degrees downward from the horizontal line H to about 3 degrees upward, and the standard points are sufficiently contained. Further, since the second reflecting surface 22 is provided at a position where the amount of light incident from the light source 9 is small, the second reflecting surface 22 is irradiated thinly and uniformly.

  As a result, the gap between the light distribution pattern 11 and the light distribution pattern 12 is 2 degrees, but the light distribution pattern 26 obtained by the second reflecting surface 22 is 4 degrees, so that there is a margin of 1 degree in each of the downward direction and the upward direction. The lamp assembly reaming error in the manufacturing process is about ± 0.5 degrees, and the uniformity of the light distribution is also about ± 0.5 degrees. Once it is held, it is possible to easily satisfy the required standard easily and stably without removing the standard point.

  As described above, according to the vehicular lamp according to the present invention, the projector-type lamp unit 2 including the convex lens 4, the substantially elliptical reflection surface 5 and the light source 6, the first reflection surface 21, the second reflection surface 21, and the second reflection surface 21. The reflector-type lamp unit 20 including the reflecting surface 22 and the light source 9 can easily and stably meet the required standards without being affected by errors during manufacturing.

DESCRIPTION OF SYMBOLS 1,15 ... Vehicle lamp, 2 ... Projector type lamp unit, 3, 20 ... Reflector type lamp unit, 4 ... Convex lens, 5 ... Substantially elliptic reflecting surface, 6, 9 ... Light source, 7 ... Shading plate, 8 ... Substantially release Object surface, 10, 11, 12, 26 ... pattern, 21 ... first reflecting surface, 22 ... second reflecting surface, 24 ... substrate, 25 ... socket, H ... horizontal line

Claims (4)

In a vehicular lamp that forms a light distribution pattern for low beam by irradiation light of the lamp unit, the lamp unit is a reflector type lamp unit including a light source, a first reflection surface, and a second reflection surface,
The first reflective surface is configured to reflect light emitted in the optical axis direction of the light source to form a horizontal diffusion light distribution below the horizontal line,
The second reflecting surface is located laterally with respect to the optical axis of the light source, and reflects light at a peripheral edge of light emitted from the light source toward the first reflecting surface to sandwich the horizontal line. A vehicular lamp that is configured to form a light distribution vertically.   The first reflecting surface and the second reflecting surface are substantially parabolic column surfaces, substantially rotating paraboloids, or free-form surfaces based on paraboloids. Vehicle lamp.   3. The vehicle according to claim 1, wherein the substrate on which the light source is attached is provided to be inclined from the horizontal toward the first reflecting surface and the second reflecting surface. 4. Lamps. 4. The vehicle-use vehicle according to claim 1, further comprising: a projector-type lamp unit including a convex lens, a light-shielding plate, a light source, and a reflective surface; and the reflector-type lamp unit. Light fixture.

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