JPH04107138U - automotive lighting - Google Patents

Abstract

(57) [Abstract] [Purpose] In automotive lighting devices such as spot lamps installed in the interior of a car, by simply improving the shape of the spot part, uniform and sufficiently bright spot light can be delivered to the necessary irradiation surface. The purpose of the present invention is to provide a lighting device for automobiles that can be used as a vehicle. [Structure] An inclined surface 8 is provided at the periphery of a spot portion 6 that protrudes from the inner surface of a lens 3 provided on the surface of the lamp 1 and that refracts and transmits light from the light source. The other portion of the portion 6 is configured to project light onto a necessary irradiation surface P together with the transmitted and refracted light beam.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention is a structure for automotive lighting equipment such as spot lamps installed in the interior of a car. Regarding construction.

0002

[Conventional technology]

Conventionally, spot lamps are provided in the cabin of an automobile. so-called mapra This spot lamp, also called a lamp, has a lens made of transparent synthetic resin on the surface of the lamp. A convex spot is provided on the bulb, and this spot deflects the light rays from the light source bulb. The projector is designed to transmit light in a concentrated manner to illuminate the required areas within the vehicle interior.

0003 The spot part is generally a thick circular or square part of the lens. However, it is not desirable for the appearance to protrude toward the indoor side. In particular, if the spot lamp is For those that are integrated with room lamps for general lighting, the lens surface may be The unevenness of the surface is disliked. Therefore, the spot portion is usually provided by protruding from the inner surface of the lens. Ru. Also, due to the relationship between the lamp position and the required lighting location, the light rays from the light source bulb are It is normal for the light to be incident on the cut section at an angle.

0004 Figure 4 shows a conventional spot lamp that is integrated with a room lamp as described above. This is an example plan view. 10 is a lamp, 11 is a spot lamp lens, and 12 is a spotlight. The pot portion 13 indicates a lens of the room lamp. FIG. 5 has a spot section 12. The cross section of the lens 11 is shown in an enlarged view, and the light beam from the light source bulb 14 is shown on the irradiation surface P in the vehicle interior. This explains the situation in which light is projected. The light rays are slanted like lines a, b, and c shown in the figure. Although the light is transmitted and refracted through the pot part 12 and projected onto the irradiation surface P, the area of the irradiation surface P shown in the figure is If is the required irradiation range that requires spot light, then only the ray between a and b is effective light. The light between b and c becomes invalid light.

[0005]

[Problem that the idea aims to solve] In the conventional spot lamp as described above, from the light source bulb 14 to the lens 1 The light beam passing through the spot portion 12 of 1 is sufficiently focused on the required irradiation area X of the irradiation surface P. First, a considerable part of the light beam is projected onto area Y that does not require irradiation, and becomes invalid light. Ru. For this reason, for example, when trying to view a map etc. using spot light, sufficient illumination is required. This results in the disadvantage that it is not possible to obtain highly concentrated light, and other parts that are not needed become brighter. In particular, due to the mounting position of the light fixtures inside the vehicle, the spotlight is projected diagonally as shown. In many cases, the rays are oblique to the outside (see figure), where the distance is greater. The side (a side shown) is darker, and the inner side (side b) is brighter, providing the brightness necessary for viewing maps, etc. Unevenness of color cannot be obtained.

[0006] In order to eliminate this drawback, the spot prism should be made larger (as shown in the figure). Possible options include thickening H) or tilting the lens surface R, but these Unfavorable due to shape restrictions and appearance problems. In addition, supplementary lights can be used to obtain concentrated light. Providing a reflector or the like increases man-hours and costs.

[0007] In order to solve the conventional problems as mentioned above, the present invention has been developed to create a By simply improving the spot shape, a spot with uniform and sufficient brightness can be created on the required irradiation surface. Our aim is to provide automotive lighting equipment such as spot lamps that can provide target

[0008]

[Means to solve the problem]

In order to achieve the above object, the automotive lamp of the present invention is provided on the surface of the lamp. The lens is tilted around the periphery of the spot that protrudes from the inner surface of the lens and refracts and transmits the light from the light source. It has a slope.

[0009]

[Effect]

In the automotive lighting device of the present invention configured as described above, the light source is connected to a spot. The light rays incident and refracted by the inclined surface on the periphery of the spot do not become invalid light and are The light is transmitted and refracted through the area and is projected onto the required irradiation surface, providing uniform and bright illuminance. I can do it.

0010

【Example】

EMBODIMENT OF THE INVENTION Hereinafter, the structure of the present invention will be explained in more detail with reference to the embodiments shown in the drawings. figure 1 is a plan view showing an embodiment of an automobile lamp to which the present invention is applied, and FIG. 2 is II of FIG. -II line (spot part center line) sectional view.

[0011] This lamp (spot lamp) 1 is similar to the conventional spot lamp shown above, It is integrated with the room lamp, and the spot lamp lens is installed in the casing 2. A lens 3 and a room lamp lens 4 are incorporated. 5 is inside the casing 2 This is the light source bulb of the spot lamp installed in the.

0012 As shown in Fig. 2, the inner surface of the spot lamp lens 3 (the side of the light source bulb 5) As shown in the figure, the spot part 6 is perforated, and the other parts of the lens 3 are thicker. It forms a spot prism. The top of the spot portion 6 facing the light source bulb 5 Surface 7 is a substantially horizontal plane. And this spot from the inside of lens 3 As shown in the figure, the part that rises on the peripheral edge of the top surface 7 forms an inclined surface 8 that widens at the base. It has become. 9 is a plate provided on the inner surface side of the lens 3, which is connected from the light source bulb 5. The emitted light passes through the opening 9a of this plate 9 and enters the spot section 6. It has become.

[0013] When using a spot lamp, the light source bulb 5 is turned on by operating a switch, etc. The light rays A, B, and C incident on the top surface 7 of the spot portion from the bulb 5 are The light is refracted and all of the light is projected onto the necessary irradiation surface E as shown in the figure. On the other hand, from valve 5 The light ray D incident on the inclined surface 8 of the spot portion also passes through the refracting prism formed by the inclined surface 8. The light is refracted and projected onto the required irradiation surface E. Therefore, the required irradiation surface E is The light beam from the top surface 7 and the light beam from the inclined surface 8 overlap. The light ray passing through the inclined surface 8 is shown as the only ray D in the figure, but the light ray passing through the inclined surface 8 is All incident light rays are projected onto the required irradiation surface E, and these can also be done. The corner of the inclined surface 8 is set so that the light is projected on the farthest part (the area of E that is closer to A). The degree and area (size of the prism) are set.

[0014] By configuring the shape of the spot portion 6 of the lens 3 as described above, the required irradiation surface E is illuminated by all the light rays passing through the spot part 6, and the outside where the brightness originally falls The closer the light rays overlap, the more the illumination of the spot where the spot light is needed improves. This provides uniform brightness. Also, as shown above, it is inclined from the general curvature surface of lens 3. By applying a gradual aperture to the refractive prism section formed by the surface 8, refraction can be improved. It is possible to reduce the glare caused by the lighting and achieve a preferable light projection state.

[0015] In the above embodiment, the inclined surface 8 of the spot portion 6 is located on the inner surface of the lens 3. It stands upright on the periphery of the top surface 7 of the spot portion, as shown in FIG. It is also possible to use a curved rising inclined surface 8a as shown in FIG. Changes in the shape of such inclined surfaces The design can be arbitrarily changed depending on the desired light projection state.

[0016]

[Effect of the idea]

As is clear from the above explanation, the automotive lighting device of the present invention is provided on the surface of the lighting device. At the periphery of the spot that protrudes from the inner surface of the lens and refracts and transmits light from the rays. A slanted surface is provided, and the rays that are incident and refracted on the slanted surface are transmitted and refracted through other parts of the spot. The structure is configured so that the beam is projected onto the necessary irradiation surface along with the refracted light beam, so it is possible to use auxiliary reflectors. Eliminates invalid light and reduces the amount of spot light with a simple composition. It is possible to increase the brightness of the spot, resulting in brighter, more uniform and highly positive spot illumination. this Cultivation of spot parts is also subject to molding restrictions due to the size of the spot prism. There is no damage to the appearance.

[Brief explanation of drawings]

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

FIG. 2 is a sectional view taken along line II-II (spot center line) in FIG. 1;

FIG. 3 is a sectional view of a spot portion of another embodiment of the present invention.

FIG. 4 is a plan view showing an example of a conventional automobile lamp.

5 is a sectional view of a portion (spot portion) of the automobile lamp shown in FIG. 4; FIG.

[Explanation of symbols]

1 Lighting equipment (spot lamp) 3 Spot lamp lens 5 Spot lamp light source bulb 6 Spot part 8 Slope 8a Slope

Claims (1)

[Scope of utility model registration request] 1. An automobile lamp, characterized in that an inclined surface is provided at the periphery of a spot portion that projects from the inner surface of a lens provided on the surface of the automobile lamp and refracts and transmits light closer to the light source.