JPS58135501A - Combination lamp 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] This invention relates to a combination lamp for a vehicle.
The present invention relates to a combination lamp that is provided with a lens body that introduces light emitted from a light source body into the interior and reflects the light at an interface on its surface, thereby reducing its size and manufacturing cost.

As a conventional combination lamp for a vehicle, there is, for example, one shown in FIG.

In the figure, (11 is a light source bulb, (2) is a lamp case provided on the vehicle body (not shown), and (3) is a light source bulb (1).
) is a colored transparent lens that colors and diffuses the emitted light. The lamp case (2) has a parabolic concave surface (2a) facing the light source bulb (1), and reflects the light emitted by the light source bulb (1) toward the lens (3). That is, the light source bulb C
As shown by the arrow in the diagram of the emitted light layer in 1), the parabolic concave surface (
2a), enters the lens (3) at a substantially right angle, and is then scattered from the lens (3) to the outside. Note that (4) is an elastic body interposed between the lamp case (2) and the vehicle body.
be.

However, in such conventional vehicle combination lamps, the light source bulb (1) is attached to the lamp case (
It is arranged at a position approximately corresponding to the focal point of the parabolic concave surface (2a) in 2), and configured so that the light reflected by the parabolic concave surface (2a) becomes parallel rays and enters the lens (3) at approximately right angles. ing.

Therefore, when the area of the lens (3) is set large, the depth dimension of the parabolic concave surface (2a), that is, the dimension of the lamp case (2), must be increased correspondingly to the area of the lens (3). There have been problems in that this increases the manufacturing cost of the combination lamp and also poses a major constraint on the design of the vehicle.

Further, in recent years, vehicles have been equipped with increasingly larger combination lamps for reasons of design and safety, so the above-mentioned tendency has been significant, and a solution to this problem has been desired.

This invention was made by focusing on such conventional problems, and includes a light source that emits light, and a concentrator that introduces the light from the light source into the interior and distributes the light inside by reflecting the light at the interface of the surface. It is an object of the present invention to configure a combination lamp for a vehicle, comprising an optical lens body and a reflective layer provided on the back surface of the condensing lens body to reflect the light reflected at the interface, and to solve the above-mentioned problems. I'm here.

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

FIGS. 2 to 6 are diagrams showing an embodiment of the present invention.

As shown in Figure 2, a vehicle combination lamp (
111 is composed of a combination of side lights and brake lights,
For example, as shown in the figure, it is arranged at the rear of the vehicle body (121).

The configuration of the combination lamp (111) is shown in Figure 3 (a).
l(bl), (12a) is the vehicle body ('12
1 rear panel, (131 a colored transparent lens that engages with the barrier panel (12a) via a seal rubber (14);
(15) is a condensing lens body interposed between the rear pallet (12a) and the lens (13). The lens (13) has a plurality of concentric convex portions formed on its inner surface (13a) to scatter light, and has a stud pole H]61 and a nut 0.
The rear panel (12a) is fixed to Ic via η.

The condensing lens body (15) is pressed by the lens (131) and its peripheral edge is brought into contact with the seal rubber (141).
A cylindrical recess (15a) is formed approximately in the center of the recess (15a), and a light bulb (181) serving as a light source is housed within this recess (15a). As shown in detail in FIG. 5, the front surface (15b) is formed into a flat planar shape, and the back surface (N5c)jd has a sawtooth cross-section with substantially the same convex portions formed therein.

Furthermore, this condensing lens body (151 is a center surface (
15b) and the concave portion (15a) ((a) in the figure is composed of a convex lens (19+), and a condensing lens body (15
) has a substantially tapered shape in which the thickness decreases toward the periphery. The serrated back surface (15c) of the condenser lens body 051 is coated with silver plating or the like, and the first concave mirror portion (211 is indicated by the annular range (al) in the figure, and the first concave mirror part (211 is indicated by the annular range (bl) in the figure). The second concave mirror part (forms 221, +211
1221 forms a reflective layer. These first concave mirror part (2I) and second concave mirror part (221 is the reflective layer (23)
This reflective layer (231) reflects the light into parallel rays.

In such a vehicle combination lamp (former), as shown in the figure, the condenser lens body (151 is sandwiched between the rear panel (12a) and the lens 0.3) and the lamp case (Fig. Since reference (2)) is not required, the combination lamp (111 has a small thickness dimension, and the old combination lamp) is configured to be thin. Now, when the light bulb (181) is connected to a power source (not shown), the light bulb (
The light emitted by 181 is irradiated to the outside through a path indicated by an arrow in the figure.

In other words, a part of the light emitted by the light bulb (181) is transmitted through the convex lens 0!Jf: light lens (13) of the condenser lens body (15).
), and a part of it is irradiated onto the side wall (15a) of the recess (15a).
15d) and enters the condenser lens body (15).
The light is irradiated from the concave mirror part (surface +15b reflected by 21) to the lens (13), and the other part is irradiated from the concave part (15b).
After entering the condenser lens body (151) from the vertical wall +15d of the condenser lens body (15d), it is reflected at the interface on the surface (15b) of the condenser lens body (151). (15b) illuminates the lens (131).

These lights consist of parallel rays substantially perpendicular to the lens (131), and are irradiated to the outside from the lens (131) with colored and scattered light.

In this way, the light emitted by the light bulb (181) enters the condenser lens body a51 and the surface (1) of the condenser lens body (15).
5b) and is distributed within the condenser lens body (151), so even if the condenser lens body (15) is relatively thin, it is possible to guide the light to its periphery, and this condenser lens Combination lamp (11) using body (15)
The thickness of the lamp is reduced, making it possible to manufacture thin combination lamps. Furthermore, due to design reasons, such combination lamps (131) often have a substantially rectangular shape with the lens (131) extending in the vehicle width direction, and in this case, the degree of light distribution in the longitudinal direction is increased. Therefore, in this invention, Fig. 3-
), the recess (15a
) is formed into a substantially elliptical shape and is configured to distribute light abundantly in its longitudinal direction.

Note that the concave portion ti5a) of the condensing lens body f151 is the sixth
It may also be shaped as shown in the figure. That is, the concave portion (15a) of this condensing lens body (151)
) is formed with a convex lens portion (15e). Therefore, the light emitted by the light bulb (181) is
Since the light is refracted at point e), the amount of light reaching the periphery of the condenser lens (15) increases.

FIG. 7 is a diagram showing another embodiment of the invention.

In the combination lamp (old) 2 of this example,
A plurality of substantially concentric recesses are formed on the back surface (15c) of the condensing lens body f151, and a transparent colored layer C241 is fixed to this back surface (15c). In addition, this colored layer (2
41 condenser lens body (15) and the opposite back surface (24a)
is coated with silver plating or the like to form a reflective layer (23). Further, the condenser lens body t15) is provided with a sub-lens body. The sub-lens body T251 is
The light bulb (18) has a substantially conical shape, and the condenser lens body (15)
1, the top of which is directed toward the light bulb Q81, and the bottom of which is aligned with the surface (] 5b) of the condenser lens (15). The side surface (25a) of this sub-lens body Q51 has a sawtooth cross section with a number of convex portions formed concentrically, and the light bulb (25a) incident on the side surface (25a) has a sawtooth shape.
It is configured to reflect the light from 181 at the interface.

In the old combination lamp with such a configuration, the light emitted from the bulb α is reflected by the first concave mirror part (21) and the side surface of the rear sublens body (251), as shown by the arrow in the figure. It is reflected by (25a) and further colored layer (
to). The light that has entered the colored layer (24) enters the colored layer (24) and is reflected by the reflective layer (23).
It is colored by the colored layer (24J), and is further refracted and scattered at the critical part between the colored layer (24) and the condensing lens (151),
After re-entering the condensing lens body (151), the light is irradiated to the outside.In other words, in this old combination lamp, the light is emitted on the back surface (15c) of the condensing lens body (15) in which a concave portion is formed. Since the light is refracted and scattered, the light emitted from the condenser lens body (15) is scattered light.

On the other hand, the light incident on the sub-lens body (251) from the outside is reflected at the interface between the sub-lens body 175+ and the condensing lens body (15) and reflected to the outside, as shown by the arrow in the figure. Therefore, this sub-lens body 12 also has the function of a reflector lens.

In this way, in this old combination lamp, a colored layer (
Since the reflecting layer (23) formed by coating the back surface (5c) of the condensing lens body (151) and the colored layer Q41 to which 241 is fixed and twisted forms a substantially concentric concave portion, the above-mentioned implementation is possible. Lens for colored scattering shown in the example (131
is not necessary. In general, since the sub-lens body (25) embedded in the condenser lens body (115) diffuses the light emitted by the light bulb (181), it is also possible to further reduce the thickness dimension of the condenser lens body (151). As a result, this combination lamp (111) can be made even thinner. Also, since the sub-lens body (251) also functions as a regular reflector lens, there is no need to provide a separate reflector lens, making it even thinner. It is possible to downsize.

As described above, according to the present invention, there is provided a light source body that emits light, a condensing lens body that introduces the light from the light source body and distributes the light inside by surface interface reflection, and the condensing lens body that A combination lamp for a vehicle is provided with a reflective layer provided on the back surface of the lens body to diffusely reflect the light reflected at the interface.
This structure makes it possible to provide a low-cost vehicle combination lamp that has a large light irradiation area and is thin, increasing the effective volume of the vehicle trunk and increasing the degree of freedom in designing the vehicle or bumper. This effect can be obtained.

In addition, in the combination lamp shown in FIG.
Since it is configured as a convex lens, the degree of diffusion of the light emitted by the light bulb is increased, and the effect that the light reaching the periphery of the condensing lens body becomes abundant can be obtained.

Furthermore, in the embodiment shown in FIG. 7, a sub-lens body is used as a condenser lens body, which reflects the light incident from the outside at the interface, and also reflects the light incident on the light source body at the interface and distributes the light inside the condenser lens body. In addition to the above-mentioned effects, the combination lamp can be made even more inexpensive. Furthermore, in the embodiment shown in FIG. 7, a concave portion is formed on the back surface of the collective lens body so that light is refracted, and this back surface is coated with a mirror-treated colored transparent colored layer. In addition, there is no need for a lens for coloring and diffusing light, making it possible to provide this combination lamp at a lower cost.

[Brief explanation of drawings]

Fig. 1 is a schematic cross-sectional view showing a conventional combination lamp for a vehicle, Fig. 2 is a schematic perspective view showing the rear part of the vehicle, and Fig. 3 is a schematic cross-sectional view showing a conventional combination lamp for a vehicle.
(Al is a plan view showing a combination lamp for a vehicle according to an embodiment of the present invention, FIG. 3 (BL is FIG. 3 (
The figure which shows the cross section of the vehicle combination lamp of AT by the line ■-■. Figure 4 is a sectional view showing in detail the condensing lens body and bulb of the vehicle combination lamp in Figure 3 (al), and Figure 5 is a cross-sectional view showing the collective lens body in the vehicle combination lamp in figure 3 (at). 6 is a partial sectional view showing another aspect of the concave portion of the condensing lens body of the vehicle combination lamp shown in FIG. 3 (al), and FIG. It is a partial cross-sectional view showing a condensing lens body of a combination lamp for a vehicle according to another example.
l+...Combination lamp (151...Condensing lens body (181...Light bulb (221...Reflective layer)...Colored layer (251...Sub-lens body Patent applicant Nissan Motor Co., Ltd. Company agent Patent attorney - Department Figure 1

Claims (3)

[Claims] (1) A light source body that emits light, a condensing lens body that introduces the light from the light source body and distributes the light inside by reflection at the surface interface, and a condensing lens body that is provided on the back surface of the condensing lens body and said interface A combination lamp for a vehicle, characterized by comprising a reflective layer that reflects reflected light. (2) embedded in the condensing lens body facing the light source body, the light from the light source body is reflected at the interface and diffused into the condensing lens body, and the light incident from the outside is reflected to the outside; 2. The combination lamp for a vehicle according to claim 1, further comprising a sub-lens body. (3) The condenser lens has a plurality of concave portions for scattering light formed on its back surface, and a colored transparent colored layer covering the back surface, and the reflective layer is a coating on the colored layer. A combination lamp for a vehicle according to claim 1, characterized in that it is made of a treated mirror surface.