JPH04105406U - Inner lens for vehicle composite lights - Google Patents

Abstract

(57) [Summary] [Purpose] In a composite vehicle light fixture in which two inner lenses are arranged on the back of each outer lens having a joint where two surfaces for different purposes are in close contact, only one of the light fixtures is lit. To solve the problem that sometimes, the light emitted from the end face of the inner lens of this lamp causes the other outer lens to shine, which causes color mixing and impairs visibility. [Structure] At least one of the inner lenses 1 and 2, for example, a prism cut 2b that reflects or refracts the light propagating on the inner surface of the inner lens 2 is provided on the end surface of the inner lens 2 near the joint 23. It is designed so that it does not reach the outer lens 1, thereby preventing color mixing and the like to achieve the purpose.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to vehicle lighting, and in detail, it is a combination lamp etc. For example, the inner light of a composite light that combines a tail light, direction indicator light, etc. This is related to lenses.

0002

[Conventional technology]

Figure 6 shows an example of the configuration of a conventional lamp of this kind, which has two outer lenses. For example, the tail light outer lens 21 and the direction indicator light outer lens 22 are The legs 21a and 22a provided on the lenses 21 and 22 are closely joined to form a joint. 23, and the joint portion 23 is connected to a fitting portion provided in the partition portion 31 of the housing 30. By being fitted into the groove 31a, a composite light fixture is formed in which each light fixture functions independently. It is assumed that

0003 At this time, in order to maintain uniformity in the shape of the above-mentioned lamp, the tail light outer The lens 21 and the turn signal light outer lens 22 have a structure for forming light distribution characteristics. The lenses are not cut, and the backs of both outer lenses 21 and 22 are On the surface are taillight inner lenses 91 each having the lens cut for the purpose described above. A direction indicator light inner lens 92 is provided, and both of these inner lenses Lenses 91 and 92 are also hooked by ribs 91a and 92a using the fitting groove 31a, It is fixed so as to cover this fitting groove 31a.

0004

[Problem that the idea aims to solve]

However, in the conventional configuration described above, the taillight inner lens 91 and the respective end surfaces 91b and 92b of the direction indicator light inner lens 92 are connected to the joint portion. 23, so for example, when only the light on the direction indicator light side is turned on. The light propagating through the inner surface of the direction indicator light inner lens 92 due to internal reflection reaches the end surface 9. 2b and exits from the taillight outer lens 21 via the joint 23. As a result, the direction indicator light, which should normally be orange, is mixed with red, making it difficult to see. This has led to the problem of lowering the quality of the product.

[0005] In order to solve this problem, as shown in FIG. 7, an additional step is provided on the outside of the fitting groove 31a. A difference part 31b is provided, and the tail light inner lens 91 and the direction indicator light inner lens The respective end surfaces 91b and 92b of the screw 92 are brought into close contact with the wall surface of the fitting groove 31a. It has been proposed to prevent the radiation of light from the end faces 91b and 92b of the In some cases, as mentioned above, the lens is not cut, that is, the rear light is transparent. The fitting groove 31a is inserted through the inner lens 21 and the direction indicator outer lens 22. If it becomes something that can be seen openly, it will seriously worsen the appearance and damage the product quality. This caused another problem.

[0006]

[Means to solve the problem]

This invention is a concrete means to solve the conventional problems mentioned above. Each lens is placed on the back of each of the outer lenses, which have a joint where the two surfaces of the target come into close contact. In the inner lens of a composite vehicle lamp, at least The light propagating through the inner surface of this inner lens also appears on the other end face near the junction. A reflective or refractive prism cover is installed so that it does not reach the outer lens of one of the lenses. We provide an inner lens for vehicle composite lighting, which is characterized by a By doing so, the conventional It is something that solves problems.

[0007]

【Example】

Next, the present invention will be explained in detail based on an embodiment shown in the drawings. In order to facilitate understanding, the same parts as in the conventional example are given the same reference numerals and explained. Explanation of some overlapping parts will be omitted. In Figure 1, the symbol 1 is the tail light inner lens, and the symbol 2 is the rear light inner lens. These are inner lenses for direction indicators, and these inner lenses 1 and 2 are attached to the joint 23. The tail light outer lens 21 and the direction indicator light outer lens 22 are brought closer together. , and furthermore, the partition portion of the housing 30. The ribs 1a and 2a are used to hook the fitting groove 31a provided in the The same applies to the fact that it is fixed in a covering manner.

[0008] However, according to the present invention, at least one of the The direction indicator light inner lens 2 is provided on the end face of the lens 2 facing the joint portion 23. A prism that reflects or refracts light that propagates through the inner surface and reaches this end surface. A rhythm cut 2b is applied, and the bending action of the prism cut 2b causes the above-mentioned The light propagating through the inner surface of In some cases, the tail light does not reach the outer lens 21 of the tail light.

[0009]Here, the prism cut 2b will be explained in more detail. For example, when the prism cut 2b is formed as a reflecting prism, if the refractive index of air is n ₀ =1 and the refractive index of the member on which the tail light outer lens 21 is formed is n ₁ =1.5, then as shown in FIG. As shown in Figure 2, from Snell's law, n ₀ sin θ ₁ = n ₁ sin θ ₂ , sin θ ₁ = 1.5 sin θ ₂ is obtained, and the part where this equation does not hold, that is, 1>sin θ Total reflection is performed at an angle θ ₂ in the range of ₂ > (1/1.5), and an appropriate angle is selected from within this range of angle θ ₂ to form a direction indicator light inner as shown in Figure 3. By setting the prism cut 2b on the end face of the lens 2, it is possible to prevent light from the end face of the direction indicator light inner lens 2 from reaching the tail light outer lens 21.

0010 By doing this, for example, when only the direction indicator side light is turned on, it is possible to This prevents the light from reaching the taillight side outer lens 21 and causing color mixture, and Since the direction indicator light inner lens 2 is formed to cover the fitting groove 31a, It also prevents the fitting groove 31a from being viewed directly.

0012 In addition, in the above embodiment, the prism is cut only on the end face of the direction indicator light inner lens 2. 2b was explained, but this can also be applied to the taillight inner lens 1 side as a matter of course. Needless to say, it is a good thing to do.

[0013] What is shown in FIGS. 4 and 5 is another embodiment of the present invention, and the previous embodiment (see FIG. 3) is arranged so that the light that has reached the prism cut 2b is refracted forward in the irradiation direction of the lamp. A reflective surface with a prism cut 2b is formed on the back side of the direction indicator light inner lens 2. On the other hand, in the embodiment shown in Fig. 4, the turn signal light is refracted backward in the direction of illumination. A prism cut 2c is formed on the front side of the inner lens 2, and furthermore, as shown in FIG. The product is a prism cut 2d with reflective surfaces on the front and back sides respectively. The radiation of light from this end face is eliminated by double reflection, and both of these The embodiments can be freely adopted, and the point is that the shape of the joint 23 or the desired effect It may be selected freely depending on the degree.

[0014]

[Effect of the idea]

As explained above, according to the present invention, this inner lens is attached to the end face of the inner lens. to prevent light propagating through the inner surface of the lens from reaching the outer lens for other purposes. By using a prism cut, when only one of the lamps is lit, it The light emitted from the end face of the inner lens of the lamp causes the outer lens to It has an excellent effect on improving visibility by eliminating color mixing caused by glittering images. shall be taken as a thing.

[0015] Further, the inner lens is used as a member that covers a fitting groove formed in the housing. This allows the fitting part to be formed without being visible from the outer surface of the outer lens. However, even when the above effects are obtained, the product quality does not deteriorate like in the conventional example. prevent.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of an inner lens of a composite vehicle lamp according to the present invention.

FIG. 2 is an explanatory diagram showing the operation of the same embodiment.

FIG. 3 is a cross-sectional view showing an enlarged main part of the same embodiment.

FIG. 4 is a sectional view showing the main parts of another embodiment of the present invention.

FIG. 5 is a sectional view showing the main parts of still another embodiment of the present invention.

FIG. 6 is a sectional view showing a conventional example.

FIG. 7 is a sectional view showing another conventional example.

[Explanation of symbols]

1...Taillight inner lens 1a...Rib 2... Turn signal light inner lens 2a...Rib 2b~2d……Prism cut 21...Tail light outer lens 22... Turn signal light outer lens 23...Joint part 30……Housing 31... Partition part 31a... Fitting groove

Claims (1)

[Scope of utility model registration request] 1. In an inner lens of a vehicle composite lamp, which is disposed on each back surface of an outer lens having a joint portion where two surfaces for different purposes come into close contact, at least one of the inner lenses is located near the joint portion. An inner lens of a composite lamp for a vehicle, characterized in that an end face of the inner lens is cut with a reflective or refractive prism so that light propagating through the inner surface of the inner lens does not reach the other outer lens. .