JP2002075019A - Lighting fixture for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problem of an increase in cost by adding a specialized electric bulb and the like, as in many case it is difficult to distribute full amount of light to oblique rear, in an usual lighting fixture for vehicle that requires light distribution to oblique rear. SOLUTION: In this invention, a light emitting part 5a to oblique rear direction is composed of a reflecting face 7 for rear lighting that is set in the vertical wall of the inner side of a body for a light source 2 and a refracting/reflecting prism 6 that is set in the inner and outer face of a lens 5 of the outside of the body. The refracting/reflecting prism 6 is equipped with a light transmitting part 8 to oblique rear that does not change the direction of light for the light from the reflecting face 7 for rear lighting. Accordingly, this lighting fixture 1 for vehicle can distribute full amount of light with sum up of the refracting/ reflecting prism and the reflecting face for rear lighting and solves the problem.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a vehicular lamp mounted on a corner of a vehicle such as a side marker lamp or a side turn signal lamp and requiring a wide range of irradiation angles from front to back. It is.

[0002]

2. Description of the Related Art FIGS. 3 to 3 show examples of the structure of a conventional vehicle lamp of this type using a front turn signal lamp or the like.
In FIG. 5, first, in the vehicular lamp 80 shown in FIG. 3, a part of the light directed from the light source 81 to the outside of the vehicle body is changed in course to obtain light to be projected obliquely rearward. In addition, a diagonally rearward-direction light emitting portion 82a by a refraction / reflection prism 83 is provided at an appropriate position outside the vehicle body of the lens 82.

As shown in FIG. 4, the refraction / reflection prism 83 includes a refraction portion 83a provided on the inner surface of the lens 82.
And the refraction portion 83a corresponds approximately one-to-one with the lens 82.
And a reflecting portion 83b provided on the outer surface side of the light emitting device. Things.

In a vehicle lamp 90 shown in FIG. 5, a light source 91 of an upright wall 92 provided inward of the vehicle body.
A rear-reflecting reflecting surface 93 is provided at a position in front of the light source 91 as appropriate.
Is reflected at a desired angle backward. Therefore, the portion through which the light from the rear reflection surface 93 of the lens 94 is transmitted becomes the oblique rear direction light emitting portion 95.

[0005]

However, in the vehicular lamp of the conventional configuration described above, first, in the vehicular lamp 80 shown in FIG. 3, a part of the light to the side is converted to the light to the rear. This causes a problem that the amount of light to the side surface tends to be insufficient. Further, in the vehicle lamp 90 shown in FIG. 5, there is a problem that the shape of the vehicle lamp 90 is not satisfied, for example, the standing wall 92 does not have a sufficient size in front of the light source 91. In such a case, a separate light source (not shown) must be provided in order to emit light obliquely rearward, which increases the cost of the vehicle lamp.

[0006]

According to the present invention, as a specific means for solving the above-mentioned conventional problems, light is provided at a corner of a vehicle and projects light obliquely rearward in addition to the front of the vehicle lamp. In the vehicular lamp comprising a rearward light emitting portion, the rearward light emitting portion includes a rearward reflecting surface provided on a standing wall inside the vehicle body with respect to the light source, and a rearward reflecting surface provided between a lens outside the vehicle body with respect to the light source. It comprises a refraction / reflection prism provided on the outer surface, and the refraction / reflection prism has an oblique rear light transmitting portion that does not significantly change the directionality of light with respect to the light from the rearward reflection surface. An object of the present invention is to solve the problem by providing a vehicular lamp characterized by being provided.

[0007]

Next, the present invention will be described in detail based on an embodiment shown in the drawings. The reference numeral 1 shown in FIG. 1 is a vehicle lamp according to the present invention.
Is composed of a light source 2, a reflecting mirror 3, a standing wall 4 provided on the vehicle body side of the reflecting mirror 3, and a lens 5 covering the light source 2, the reflecting mirror 3, and the standing wall 4. It is similar to that of

The vehicular lamp 1 is used, for example, as a front turn signal lamp or the like, and is also required to have a wide irradiation angle in the front-rear direction. Therefore, the lens 5 is provided with an oblique rear direction light emitting portion 5a for emitting light obliquely rearward.

Here, in the present invention, the refracting / reflecting prism 6 is provided in the oblique rear direction light emitting portion 5a, and the reflecting wall 7 for rearward illumination is also provided in the upright wall 4. The oblique rear direction light emitting section 5a transmits light from the light D from the light source and light R from the rear reflection surface 7.

At this time, according to the prior art, since the refraction / reflection prism 6 is formed only by converting the light D from the light source 2 in a desired backward oblique direction, it is formed later. It does not transmit the light R from the reflecting surface 7 for projection. Further, even if the light R is transmitted, it does not provide a desired directionality to the light R from the rear reflection surface 7 having a different incident angle with respect to the light D from the light source 2.

FIG. 2 shows the configuration of the refraction / reflection prism 6 according to the present invention in which the above points are improved. Light incident surface 6a for refracting and reflecting light and directing it in a predetermined direction
And a rear light transmitting portion 8 for transmitting the light R from the rear reflecting surface 7 without changing its course, and the rear light transmitting portion 8 receives rear light. It is composed of a surface 8a and a rear emission light emitting surface 8b.

A light source incident surface 6a and a rear light incident surface 8a are provided on the inner surface of the lens 5, and a light source reflecting surface 6b and a rear light emitting surface 8b are provided on the outer surface of the lens 5. One element of the light source reflection surface 6b corresponds to one element of the light source incident surface 6a, and similarly, one element of the rear light emission surface 8b corresponds to one element of the rear light incidence surface 8a. It is supposed to.

First, each light source incident surface 6a provided on the inner surface side of the lens 5 gives an appropriate refraction to the light D from the light source 2 and transmits through the lens 5, and is provided on the outer surface side of the lens 5. Each transmits light to the corresponding light source reflection surface 6b. The light source reflection surface 6b receiving the light reflects the light backward by internal reflection due to the difference between the refractive index of the member on which the lens 5 is formed and the refractive index of the atmosphere.

The light from the light source 2 reflected on the light source reflecting surface 6b is radiated to the outside via the rearward light exit surface 8b. At this time, the light is refracted by the rearward light exit surface 8b. The course is different from that when the light is reflected by the light source reflection surface 6b, and this will be described in the section of the post-oblique light transmission section 8 below.

The rearward incident surface 8a of the oblique rear light transmitting portion 8 is provided to introduce the light R from the rearward reflecting surface 7 into the lens 5, and at this time, In order not to cause reflection or the like and to prevent this light from changing its course, the light R
In principle, it is preferable to be orthogonal to the path.

Further, the lens 5 is connected to the rear incident light incident surface 8a.
The light introduced into the lens 5 is transmitted through the lens 5 and radiated to the outside from the corresponding rear-emitting light emitting surface 8b. It is desirable that the rearward light exit surface 8b is also orthogonal to the path of the light R from the rearward reflection surface 7, that is, the rearward incident surface 8a It is preferable that the light emission surface 8b is parallel to the rear light emission surface 8b.

The rear light incident surface 8a and the rear light exit surface 8b are configured in parallel in this manner, so that the rear light incident surface
Even if a is slightly inclined with respect to the light R from the reflecting surface 7 for recurrence, and the light after being introduced into the lens 5 is refracted, the inclination is radiated to the outside from the emitting surface 8b. Therefore, even if the right angle to the light from the rearward reflecting surface 7 is slightly deviated due to, for example, an assembling error of the vehicular lamp 1, the performance of the vehicular lamp 1 has no effect. Can have no effect.

Here, the back light emitting surface 8b will be described in more detail. In the conventional vehicle lamp (see FIGS. 3 and 4), the surface corresponding to the back light emitting surface 8b is a light source incident surface. According to the present invention, only the light incident from the light source incident surface 6a and reflected by the light source reflecting surface 6b is added to the rear light, whereas only the light incident from the light source incident surface 6a and reflected by the light source reflecting surface 6b passes therethrough. The light R from the rear reflecting surface 7, which enters from the incident light surface 8a, also passes through.

As described above, since the rear light emitting surface 8b is required not to change the path of light from the rear reflecting surface 7, the rear light emitting surface 8b is parallel to the rear light incident surface 8a. In addition, it is required that the light is substantially orthogonal to the light from the reflecting surface 7 for rear irradiation. Therefore, in the present invention, the angle of the light source reflecting surface 6b is set on the premise that the rear light emitting surface 8b is set as described above.

In the process of forming the lens 5, when the back-light incident surface 8 a and the back-light output surface 8 b are formed to be parallel to each other, the back light incident surface 8 a and the back light emergence surface 8 b should be along the direction in which the mold for forming the lens 5 is removed. , Because it can be obtained without performing precise processing to obtain the required angle on the mold,
Conversely, the direction in which the mold is removed may be set as an angle along the back-light incident surface 8a and the back-light output surface 8b.

Next, the operation and effect of the vehicle lamp 1 of the present invention having the above-described configuration will be described. According to the present invention, the light illuminating the vehicle lamp 1 obliquely rearward is:
Since the light D from the light source 2 is obtained by adding the light obtained by the refraction / reflection prism 6 and the light R obtained by the rear reflection surface 7, the respective elements, the refraction / reflection prism 6 and the rear reflection, are obtained. The surface 7 does not require much light quantity.

Accordingly, the refraction / reflection prism 6 reduces the loss of the amount of light to the side, and the amount of light to the obliquely rearward direction is also sufficient, so that the vehicle lamp 1 can be viewed from any direction. Light distribution characteristics without excess and deficiency are obtained, and visibility is improved. Note that reference numeral 9 in FIG.
Is an outer lens provided to harmonize the vehicular lamp 1 with the design line of the vehicle body and the like, and does not exhibit remarkable functions and effects in characteristics. Omitted.

[0023]

As described above, according to the present invention, a vehicle which is provided at a corner of a vehicle and which is provided with an oblique rear direction light emitting portion for projecting light obliquely rearward in addition to the front direction of the vehicle lamp. In the lighting device, the oblique rear direction light emitting portion includes a rearward reflecting surface provided on an upright wall inside the vehicle body with respect to the light source, and a refraction / reflection prism provided on the inner and outer surfaces of the lens outside the vehicle body with respect to the light source, The refraction / reflection prism has a vehicular lamp provided with an oblique rear light transmitting portion that does not significantly change the directionality of light with respect to the light from the rear reflection surface, Conventionally, there is a shortage of light obliquely rearward, and it is unavoidable to use even the irradiation light to the side, which impairs the light distribution characteristics as a vehicle lamp, or It cannot be established as a vehicular lamp due to the light distribution characteristics A special light bulb in the rear had to be provided, but the sum of the refraction / reflection prism and the reflective surface for rear-illumination was sufficient, and it was extremely excellent in improving the performance of vehicle lighting and reducing costs. It is effective.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a vehicular lamp according to the present invention.

FIG. 2 is an enlarged sectional view showing a main part of the same embodiment.

FIG. 3 is a sectional view showing a conventional example.

FIG. 4 is a sectional view showing a main part of a conventional example.

FIG. 5 is a sectional view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vehicle lamp 2 ... Light source 3 ... Reflective mirror 4 ... Standing wall 5 ... Lens 5a ... Slanting rear direction light emitting part 6 ... Refractive / reflective prism 6a ... Light source incident surface 6b ... Light source reflecting surface 7: Reflection surface for rear emission 8: Oblique rear light transmitting portion 8a: Rear incidence light incidence surface 8b ... Rear emission light emission surface 9: Outer lens

Claims (2)

[Claims] 1. A vehicular lamp having a rearward light emitting portion provided at a corner of a vehicle and projecting light obliquely rearward in addition to the front direction of the vehicle light, wherein the rearward light emitting portion is provided. Comprises a reflecting surface for rearward illumination provided on a standing wall inside the vehicle body with respect to the light source, and a refraction / reflection prism provided on the inner and outer surfaces of the lens on the outside of the vehicle body with respect to the light source. A vehicular lamp comprising a rear oblique light transmitting portion that does not significantly change the directionality of light with respect to light from a vehicle reflection surface. 2. The post-oblique light transmitting portion is an entrance surface provided on an inner surface side and an exit surface provided on an outer surface side along a drawing direction at the time of molding of the lens, and the entrance surface and the exit surface are the lens. 2. The vehicular lamp according to claim 1, wherein by adjusting a drawing direction at the time of molding, the direction is substantially orthogonal to a traveling direction of the reflected light from the reflecting surface for rear irradiation.