JPS58209001A - Lamp implement for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle lamp that improves visibility by alleviating differences in brightness in front of a lens.

Traditionally, various structures have been used for vehicle headlamps, taillamps, stop lamps, turn signal lamps, etc., but in recent vehicles, these lamps are used for design reasons and to show the vehicle width at a glance. For functional reasons such as the need to increase the visibility of vehicles, there is a trend toward the adoption of horizontally long lamps that extend to both side edges of the vehicle. On the other hand, due to the desire to increase the space inside the vehicle interior and in the trunk room, horizontally elongated lamps such as the tail lamps mentioned above are used as lamps at the rear of the vehicle, and in case 6 a, the lamp unit can be installed inside the trunk. There is a tendency to use a lamp body, especially one whose reflector part is not very large, to prevent it from getting into the lamp body. When using such a lamp, an inner lens with a grism must be installed on the vehicle side edge of the lamp in order to emit light over the entire surface of the horizontally long front lens.

FIG. 1(a) shows the structure of a conventional lamp of this type, and is an example of a tail lamp. In the figure, reference numeral 1 denotes a bulb serving as a light source, which is attached to four parts 2a at the center of a lamp body 2 whose inner side serves as a reflective surface. 3 is an inner lens with a prism 3a on one side, and bulb 1
The light from the front lens 4 is refracted by the prism 3a.
The lens 5 that faces towards the vehicle fixedly supports the runnobody 2 and is part of the body of the vehicle.

In the above lamp, out of the light from the bulb 1, the light that goes directly to the front lens 4 and the light that is once reflected by the reflective surface of the lamp body 2 and goes to the front lens 4 are shown in Fig. 14).
and external KtB6° through the part indicated by A of the front lens 4 in Figure 1 (B).On the other hand, among the light from the bulb 1, the light refracted by the prism 3a of the inner lens 3 is shown in Figure 1 (A) and The light exits through the part indicated by B of the front lens 4 of the same figure.

By the way, in a lamp with such a structure, the inner lens 3 is arranged relatively far from the bulb 1, and the light directed toward the inner lens 3 is refracted by the prism 3a. The amount of light passing through becomes much smaller. As a result, the brightness of the portion B of the front lens 4 due to the light passing through the inner lens 3 is much smaller than the brightness of the portion A, resulting in a large difference in brightness between the portions A and B. Therefore, there is a problem in that the sense of unity of the lamp is impaired and visibility is reduced.

The present invention has been made in view of the above points, and is a lamp in which a reflecting mirror having a light source and a flat plate having a prism portion disposed adjacent to the reflecting mirror are arranged on the back surface of the lens. In order to improve visibility by reducing the brightness difference on the front surface of the lens when viewed, a plurality of four parts or convex parts are provided at predetermined intervals on the reflective mirror surface between the light source and the flat plate to diffuse the reflected light. It is.

The present invention will be explained below based on the drawings.

FIG. 2(a) shows a first embodiment of the lamp structure according to the present invention, and the same reference numerals as in the conventional example shown in FIG. 1(a) indicate the same t# blank line portions.

In this embodiment, convex portions 6 are provided at certain intervals on the reflective surface of the runnobody 2 on the side closer to the inner lens 3, and the intervals become larger as they approach the bulb 1. The rest of the configuration is exactly the same as the conventional example shown in Fig. 1, and as shown in Fig. Where it is reflected, it is diffused. Moreover, instead of the convex part 6, four parts 7 may be provided as shown in FIG. 2(c) to diffuse the light in the same manner as in the case where the convex part 6 is provided. In this way, a part of the light reflected by the part of the reflective surface near the inner lens 3 is diffused by these convex parts 6 (or four parts) 11E)
Therefore, the amount of light hitting the front lens 4 is reduced to some extent compared to the amount of light that is directly reflected by the reflective surface. Therefore, the brightness of the front lens 4 becomes as shown by C in FIG.

The distance between the convex portions 6 (or concave portions 7) becomes wider as it approaches the bulb 1, so the reflection surface causes more diffusion. it
, 6 The l of the light gradually decreases, and the decrease in the amount of light hitting the front lens 4 also decreases. In addition, the light reflected by the reflective surface on the opposite side of the inner lens 3 is not diffused and all hits the front lens 4, so the brightness of the front lens 4 is almost the same as the brightness of part A in the conventional case. The brightness will be as shown by D in Figure 2). The brightness of the front lens 4 due to the light passing through the inner lens 3 is the same as the brightness of part B in the conventional case, and its brightness is as shown by E in FIG.

In this way, the brightness of the part of the front lens 4 indicated by C was brought closer to the brightness of the part indicated by E in Figure 2) due to the brightness of the light passing through the inner lens 3), so the front lens It becomes a trap that the light changes gradually over the entire surface of 4.

In the above embodiment, the convex portion 6 (or the four portions 7) provided on the reflective surface may also be provided on the reflective surface on the opposite side of the inner lens 3, if necessary. Also, convex s6 (A6
Alternatively, instead of providing the recesses s7), a rough surface C may be formed on the reflective surface.

FIG. 3(a) shows the main part of a second embodiment of the lamp structure according to the present invention. In this embodiment, the reflective surface of the lamp body 2 on the side closer to the inner lens 3 is coated with a coating having a different reflectance, and the part closest to the inner lens 3 is painted with the lowest reflectance. Paint 9, which has a slightly higher reflectance than the paint holder, is applied to the steep part, and paint 0, which has a slightly higher reflectance than the paint 9, is applied to the part closest to the bulb 1. In this type of lamp, the light from the bulb 1 that is reflected from the painted area is considerably attenuated and transmitted to the front lens 4, so the brightness of the front lens 4 is as shown in Figure 3 (b). The brightness becomes as shown by F in Figure 3, and its brightness approaches the brightness caused by the light passing through the inner lens 3 shown by G in Figure 3. The light reflected from the area where the coating 9 has been applied is not attenuated and is reflected by the front lens 4, so the brightness of the front lens 4 is as shown in Figure 3. The brightness is slightly higher than the brightness of part F, as shown by ■ in j. Painting: The light reflected from the area coated with 0 is not attenuated and the light reflected from the area coated with coating 9 is transmitted to the front lens 4, so the brightness of the front lens 4 is as shown in Figure 3 ( It becomes as shown by J in b), and its brightness is slightly thicker than the brightness of part H. In addition, the light reflected by the reflective surface on the opposite side of the inner lens 3 is not attenuated and is all reflected by the 811-plane lens 4, so the brightness of the front lens is almost the same as the brightness of part A in the conventional case. The brightness is 6° as shown by K in Figure 3 (b).In this way, the brightness of the parts shown by F, )l, and J of the front lens 4 is gradually reduced, and the inner lens Since the light passing through the lens 3 is brought closer to K (brightness of the part indicated by G in Figure 3 (B)), the entire surface of the front lens 4 is covered as in the case of the first embodiment. There is no part where the brightness suddenly changes, giving a good appearance.Figure 4 shows the main part of a third embodiment of the structure of the lamp according to the present invention. In this embodiment, the inner lens 3 is extended toward the bulb 1, and a texture is formed on the surface of this extended portion 3b to attenuate the light from the bulb 1. However, the rate of light attenuation due to the extension portion 3b is set smaller than the rate of light attenuation due to the inner lens 3.

In this way, among the light from the bulb 1, the light 6 does not pass through the extension 3b of the inner lens 3 and is attenuated to some extent, so that the brightness of the front lens 4 due to this light is due to the light passing through the inner lens 3. You can get closer to Akashi. Therefore, the change in brightness at the front lens 4 becomes gradual, similar to the S combination in the first and second actual hL examples.

In this embodiment, instead of forming a grain on the surface of the extended portion 3b of the inner lens 3, this extended portion 3b is
The lens of b may be made thicker or colored with smoke or the like. As explained above, the present invention provides a reflecting mirror having a light source,
In a lighting device in which a flat plate with frisms placed adjacent to the reflecting mirror is arranged on the back side of the lens, a plurality of four parts or convex parts are arranged at predetermined intervals on the reflecting mirror surface between the light source and the flat plate to diffuse the reflected light. This allows the brightness difference to gradually change over the entire surface of the front lens, thereby alleviating differences in brightness across the entire surface of the lens. Therefore, unlike in the conventional case, the sense of unity of the rungs is not impaired, improving visibility and giving a good appearance.

[Brief explanation of the drawing]

Figure 1 (0) is a side sectional view showing an example of the structure of a conventional tail rung, Figure 1 (middle) is a diagram showing the brightness of the lamp lens shown in Figure (A), and Figure 2 (A) 1 is a side sectional view showing a first embodiment of the lamp structure according to the present invention, and FIG. Figure (C) is a partially enlarged sectional view showing the main parts when four parts are provided in the lamp shown in Figure (A), and Figure (C) is a partial enlarged sectional view of the lamp shown in Figure (A). Figure 3 (A) is an enlarged sectional view of the main part showing the second embodiment of the lamp structure according to the present invention, and Figure 3 (A) is a diagram showing the brightness of the lamp shown in Figure 3 (A). FIG. 4 is a partial side view showing the third example of the 6-run structure according to the present invention. 1--Bulb, 2--・Randsboti, 3... Inner lens, 3a... Prism, 3b... Grain, 4
・・Front lens, 5・・Part of the car body, 6・−・Convex part,
7...Four parts, 8,9.10...Painted part. Patent Applicant Nissan Motor Co., Ltd. Attorney Hiroo Suzuki 11 - Aji=4- Figure 2 (B) (C) (D) 1 L) CE Figure 3 (I) (B) Figure 4

Claims (3)

[Claims] (1) In a lamp in which a reflecting mirror equipped with a light source and a flat plate having a prism portion disposed in momentary contact with the reflecting mirror are arranged on the back surface of the lens, an area where the light source momentarily contacts the flat plate of the lens. A vehicular lamp characterized by being provided with attenuation means for attenuating light directed toward the vehicle. (2) The vehicular lamp according to claim 1, wherein the attenuation means is provided with concave portions or convex portions at predetermined intervals in a predetermined number of regions of the reflecting mirror. (3) The vehicular lamp according to claim 1, wherein the attenuation means is provided by coating a predetermined area of the reflecting mirror.