JP2010225557A - Headlight for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a headlight for a vehicle, reduced in irradiation of glare light, favorable in appearance, high in flexibility in design and excellent in marketability at a low manufacturing cost. <P>SOLUTION: A light source, a reflector for supporting the light source, and an extension positioned between an outer lens and the reflector are disposed in a lamp chamber formed by a lamp body and the outer lens and a rib which rises upward from an inner surface almost along a side end of the reflector is provided on the side end part of the reflector under the extension, by which reflecting light L6' which is emitted from a bulb 6 serving as the light source, is reflected from the reflector 5b and is directed toward a lower inner surface of the extension 8b is shielded by the rib 10 to prevent reflecting light L6" directed toward the extension 8b from forming glare light. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vehicle headlamp, and more particularly, to a vehicle headlamp including a reflector and an extension.

  As this type of vehicle headlamp, for example, one having a structure shown in FIG. 7 is described as a conventional example in Japanese Patent Laid-Open No. 11-329209.

  A reflector 54 supporting a light source 53 is disposed in a lamp chamber 52 formed by a body 50 having an opening on the front surface and a lens 51 disposed so as to cover the opening of the body 50, and an opening edge of the reflector 54 is arranged. A cylindrical extension 55 is disposed between the lens 51 and the lens 51.

  Then, a shade 56 is provided so as to cover the front, top, bottom, and left and right of the light source 53, and the light directed from the light source 53 directly toward the lower inner surface 57 of the extension 55 is shielded by the shade 56, so Light is prevented from becoming illusion light (glare light) directed upward from the H reference line in the horizontal direction of the low beam light distribution pattern.

In this case, the direct light from the light source 53 is not directed to the extension 55 because it is shielded by the shade 56, but a part L _{1 of the} primary reflected light reflected by the reflector 54 is applied to the lower inner surface 57 of the extension 55. opposite, the secondary reflected light L ₂ by the lower inner surface 57 of the extension 55 becomes glare light. For this reason, the light shielding area of the shade 56 is enlarged to limit the light traveling from the light source 53 to the reflector 54 so that the reflected light reflected by the reflector 54 does not go to the lower inner surface 57 of the extension 55.

  However, enlarging the shade area of the shade reduces the light use efficiency, and the amount of light contributing to the formation of the light distribution pattern is reduced, leading to a reduction in visibility.

Therefore, as a method for solving such a problem, as shown in FIG. 8, a convex or concave step 58 extending in a direction orthogonal to the optical axis of the reflector 54 is formed on the lower inner surface 57 of the extension 55, and the light source 53. Of the reflected light emitted from and reflected by the reflector 54, the light L ₁ directed toward the lower inner surface 57 of the extension 55 is reflected upward in the lamp chamber 52 and / or toward the reflector in step 58 of the lower inner surface 57. it is that the generation of glare light is prevented by the reflected light (secondary reflected light) L ₂ Te (e.g., see Patent Document 1.).

JP 11-329209 A

  However, in the vehicle headlamp 60 having the above-described configuration, the light reflected by the lower inner surface 57 of the extension 55 upward in the lamp chamber 52 and / or toward the reflector is repeatedly reflected by the reflector 54 and finally glare. There is a risk of light.

  Also. By having the convex or concave step 58 in the design portion of the extension 55, the appearance of the extension 55 is impaired, and the degree of freedom in design is reduced.

  Further, the provision of the shade 56 increases the number of parts constituting the vehicle headlamp 60, leading to an increase in manufacturing cost.

  Therefore, the present invention was devised in view of the above problems, and the object of the present invention is a vehicle with reduced glare irradiation, good appearance, high design freedom, and excellent merchantability. The purpose is to provide an industrial headlamp at a low production cost.

In order to solve the above problems, the invention described in claim 1 of the present invention is:
In a lamp chamber formed by a lamp body having an opening on the front and an outer lens arranged to cover the opening of the lamp body,
A reflector supported by the lamp body and formed in a concave shape toward the outer lens;
A light source supported by the reflector so as to be surrounded by the reflector;
A vehicular headlamp having a substantially cylindrical extension supported by the outer lens and disposed between the outer lens and the reflector,
The extension is provided with a rib that rises upward from the inner surface substantially along the end at the end on the reflector side at the lower part of the extension.

In addition, the invention described in claim 2 of the present invention is as follows.
The rib is formed at a height at which reflected light emitted from the light source, reflected by the reflector, and directed toward the lower inner surface of the extension is shielded.

  Also, in the invention described in claim 3 of the present invention, in any one of claims 1 and 2, the reflector and the extension are both subjected to a reflection treatment on a surface viewed through the outer lens. The surface of the rib on the reflector side is a non-reflective surface.

  According to a fourth aspect of the present invention, in any one of the first to third aspects, a gap is provided between the reflector and the extension, and the lamp chamber is viewed through the outer lens. The viewing area of the lamp body that is visible from the gap when viewed is reduced by the rib.

  In the vehicle headlamp of the present invention, a light source, a reflector that supports the light source, and an extension positioned between the outer lens and the reflector are disposed in a lamp chamber formed by the lamp body and the outer lens. A rib that rises upward from the inner surface substantially along the end portion was provided at the reflector side end portion of the lower portion of the extension.

  Thereby, the reflected light emitted from the light source, reflected by the reflector, and directed toward the lower inner surface of the extension is blocked by the rib, thereby preventing the formation of glare light by the reflected light of the extension.

  Further, it is not necessary to provide the extension with a convex or concave step as in the above-described conventional example, and the degree of freedom in design related to the appearance of the headlamps can be increased to improve the merchantability.

  Furthermore, a desired light distribution pattern can be formed without providing a shade as in the conventional example. Therefore, the number of parts constituting the headlamp is reduced, and the manufacturing cost can be reduced.

It is a longitudinal section of an embodiment concerning the present invention. It is a fragmentary sectional view which shows the lower half of FIG. It is explanatory drawing of embodiment which concerns on this invention. It is explanatory drawing of embodiment similarly concerning this invention. It is a perspective view which shows the state which removed the valve | bulb from embodiment which concerns on this invention. It is a perspective view which shows the state which removed the valve | bulb from the prior art example. It is explanatory drawing which concerns on a prior art example. It is explanatory drawing which concerns on another prior art example.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIG. 1 to FIG. 5 (the same reference numerals are given to the same portions). The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention particularly limits the present invention in the following description. Unless stated to the effect, the present invention is not limited to these embodiments.

  FIG. 1 is a longitudinal sectional view of an embodiment of a vehicle headlamp according to the present invention, and FIG. 2 is a partial sectional view showing a lower half of FIG. In the following description, the vertical, horizontal, and front-rear directions are the height direction of the vehicle, the horizontal direction with respect to the road surface, and the front-rear direction of the vehicle, respectively, when the vehicle headlamp is mounted on the vehicle. Indicates.

  In the vehicle headlamp 1 according to the present embodiment, a lamp chamber 4 is formed by a lamp body 2 having an opening on the front surface and an outer lens 3 arranged so as to cover the opening of the lamp body 2. A supported reflector 5 is located in the lamp chamber 4.

  A bulb 6 serving as a light source is supported by a reflector 5 formed in a concave shape toward the outer lens 3 so as to be positioned in the lamp chamber 4, and the side is surrounded by a concave reflecting surface 7 formed of a free curved surface of the reflector 5. . A substantially cylindrical extension 8 supported by the outer lens 3 is disposed between the reflector 5 and the outer lens 3.

  Both the reflector 5 and the extension 8 are subjected to a metallic-like glittering treatment such as chrome plating on at least the surface viewed through the outer lens 3. In the reflector 5, the reflection efficiency is improved and the light distribution pattern is formed. The extension 8 contributes to securing aesthetics.

  The front end 5c of the reflector 5 and the rear end 8c of the extension 8 are not in direct contact with each other, and a gap 9 exists between them. The rear end 8c of the lower extension 8b is provided with a rib 10 that rises upward from the inner surface substantially along the rear end 8c.

  In the vehicle headlamp 1 having such a configuration, the light L1 emitted from the light emitting portion 11 of the bulb 6 toward the concave reflecting surface 7a of the reflector 5a above the horizontal plane including the optical axis X of the bulb 6 and The light L2 emitted toward the concave reflecting surface 7b of the lower reflector 5b is reflected by the concave reflecting surfaces 7a and 7b, and the reflected lights L1 ′ and L2 ′ travel in the front horizontal direction or the front lower direction.

  Among these, the lights L3 to L6 emitted from the light emitting portion 11 of the bulb 6 toward the concave reflecting surface 7b of the reflector 5b below the horizontal plane including the optical axis X of the bulb 6 are as shown in FIG. The concave reflecting surface 7b is set so that the reflected light L3 'to L6' sequentially goes forward and downward as the concave reflecting surface 7b moves away from the position close to the light emitting portion 11 of the bulb 6.

  Therefore, the primary reflected light L6 emitted toward the concave reflecting surface 7b far from the light emitting unit 11, that is, the concave reflecting surface 7b below the light emitting unit 11 and reflected by the concave reflecting surface 7b is the extension on the lower side. If the rib 10 is not provided in 8b, it is secondarily reflected by the extension 8b and heads forward and upward. Then, the secondary reflected light L6 ″ becomes glare light and dazzles the driver of the oncoming vehicle.

  On the other hand, the vehicle headlamp 1 of the present invention is provided with a rib 10 that rises upward from the inner surface substantially along the end 8c at the end 8c on the reflector 5b side of the lower extension 8b. The rib 10 shields the reflected light L6 ′ from the concave reflecting surface 7b from reaching the extension 8b. As a result, the headlamp 1 is realized that prevents the secondary reflected light L6 ″ from being generated by the extension 8b and does not irradiate glare light that dazzles the driver of the oncoming vehicle.

  As can be seen from the above, the height of the rib 10 is not fixedly determined but optically determined, and is lower than the horizontal plane including the optical axis X of the bulb 6 from the light emitting portion 11 of the bulb 6. It is preferable that the light emitted toward the concave reflecting surface 7b of the reflector 5b on the side is reflected by the concave reflecting surface 7b and the reflected light is prevented from going to the extension 8b. This is set based on an optical system including the bulb 6 of the light source and the concave reflecting surface 7b of the reflector 5b.

  The surface of the rib 10 on the reflector 5 side is preferably a non-reflecting surface, whereby the reflected light from the reflector 5 is reflected by the rib 10 and the reflected light reaches the reflector 10 again, and the tertiary reflected light from the reflector 10 is obtained. Can prevent the formation of the alignment pattern.

  Further, by providing the extension with ribs, other effects as shown in FIG. 3 can be obtained. FIG. 3 is a longitudinal sectional view of an embodiment similar to FIG.

As described above, there is a gap 9 between the front end portion 5c of the reflector 5b and the rear end portion 8c of the extension 8b, and the inside of the lamp chamber 4 of the headlamp 1 passes through the outer lens 3 from the front or diagonally forward. If you forceps, if, when no rib 10 is provided on the extension 8a, to the visible range of the lamp body 2 to be located behind the extension 8b or reflector 5b through the gap 9 is viewed is alpha ₁ contrast, visibility when the rib 10 is provided on the extension 8b is blocked by the rib 10 is visible range of the lamp body 2 in a range of beta _1.

Therefore, the visible range of the lamp body 2 that is impaired in appearance due to the ribs 10 in the extension 8b is narrowed from α ₁ to β _1, and the merchantability can be secured by improving the aesthetic appearance.

  Furthermore, the effects as shown in FIGS. 4 and 5 can also be obtained. 4 is a longitudinal sectional view of the embodiment similar to FIG. 1, and FIG. 5 is a perspective view showing a state in which the valve is removed from the embodiment.

Therefore, as shown in FIG. 4, when the inside of the lamp chamber 4 of the headlamp 1 is viewed from a certain point P that is forward or obliquely forward through the outer lens 3, it is assumed that the rib 8 is not provided on the extension 8b. , whereas the visible range of the lamp body 2 to be located behind the extension 8b or reflector 5b through the gap 9 between the rear end portion 8c of the front end portion 5c and the extension 8b of the reflector 5b is visible is alpha _2, extension 8b view the rib 10 is provided with visual range of the lamp body 2 is blocked by the rib 10 is in the range of beta ₂ in.

Accordingly, as described above, the visible range of the lamp body 2 that is impaired in appearance due to the ribs 10 in the extension 8b is narrowed from α ₂ to β _2, and the merchantability can be secured by improving the aesthetic appearance.

  When this state is compared with the conventional headlamp 70 shown in FIG. 6, the conventional headlamp 70 composed of the reflector 5b and the extension 8b having no ribs is formed from the gap between the reflector 5b and the extension 8b. The area of the visible lamp body 2 is remarkably large, whereas the headlamp 1 of the present invention composed of the extension 8b having the rib 10 and the reflector 5b as shown in FIG. It can be seen that the area of the visible lamp body 2 is greatly reduced compared to the conventional headlamp 70.

  As described above, by providing the extension with the rib, the effect of disposing the built-in object can be enhanced, the appearance can be improved, and the merchantability can be improved.

  As described above, the vehicular headlamp according to the present invention is not provided with a convex or concave step as in the above-described conventional example in the extension, but substantially along the rear end portion at the rear end portion of the lower portion of the extension. By providing a rib that rises upward from the inner surface, it is possible to prevent glare light that dazzles the driver of the oncoming vehicle without impairing the appearance of the extension.

  As a result, the degree of freedom in design related to the appearance of the headlights has increased, and it has become possible to improve the merchantability.

  Further, since the reflected light that is reflected by the concave reflecting surface of the reflector and travels toward the extension is blocked by the rib, the secondary reflected light by the extension is prevented from obstructing the formation of the alignment pattern. As a result, it is possible to obtain an optimal light distribution pattern that satisfies the standard for a headlamp and has good visibility.

  Furthermore, a desired light distribution pattern can be formed without providing a shade as in the conventional example. Therefore, the number of parts constituting the headlamp is reduced, and the manufacturing cost can be reduced.

DESCRIPTION OF SYMBOLS 1 Vehicle headlamp 2 Lamp body 3 Outer lens 4 Lamp chamber 5 Reflector 5a Reflector 5b Reflector 5c Front end part 6 Valve | bulb 7 Concave reflection surface 7a Concave reflection surface 7b Concave reflection surface 8 Extension 8b Extension 8c Rear end part 9 Crevice 10 Rib 11 Light emitting part

Claims (4)

In a lamp chamber formed by a lamp body having an opening on the front and an outer lens arranged to cover the opening of the lamp body,
A reflector supported by the lamp body and formed in a concave shape toward the outer lens;
A light source supported by the reflector so as to be surrounded by the reflector;
A vehicular headlamp having a substantially cylindrical extension supported by the outer lens and disposed between the outer lens and the reflector,
The vehicle headlamp according to claim 1, wherein the extension is provided with a rib that rises upward from the inner surface along substantially the end portion at an end portion on the reflector side at a lower portion of the extension.   2. The dual-use headlamp according to claim 1, wherein the rib is formed at a height at which reflected light emitted from the light source and reflected by the reflector toward the lower inner surface of the extension is shielded. light.   The reflector and the extension are both subjected to a reflection treatment on at least a surface viewed through the outer lens, and a surface of the rib on the reflector side is a non-reflective surface. The vehicle headlamp according to any one of 1 and 2.   A gap is provided between the reflector and the extension, and a viewing area of the lamp body that is visible from the gap when the lamp chamber is viewed through the outer lens is reduced by the rib. Item 4. The vehicle headlamp according to any one of Items 1 to 3.

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