JPS58185338A - Glare-free rearview mirror - Google Patents

Abstract

PURPOSE:To provide full glare-free function by inserting a laminated shading plate between a prism mirror and a reflective film and cutting off a part of the rays with high intensity incident on or reflected from the refelective surface on the rear side possessing high reflective coefficient when a glare-free rearview mirror is used. CONSTITUTION:A reflective surface is formed by providing a metallic reflective film 5 with high reflective coefficient on the rear of the mirror 2 of a prism mirror. A shading plate 15 is provided between the prism mirror 2 and reflective surface and is provided with a shading interfacial surface 15b that intersects with the reflective surface and is formed in a laminated flat plate obtained by making each side of many rectangular parallelepiped transparent acrylic resin thin plates 15a to abut and joint with each other. The interval W of this shading interfacial surface 15b and the thickness D of the shading plate are determined considering the visual field of the incidence angle or the like of incident external light that controls the glare-free effect when a glare-free rearview mirror is used. That is, the rays incident on or reflected from the reflective surface 5' on the rear with high reflective coefficient or those possessing incidence angles or reflection angles which exceed a certain value are interrupted.

Description

[Detailed description of the invention] The present invention relates to an anti-glare grasshopper mirror for automobiles.

External information behind the car is 1! As a gorge image that is easy for drivers to recognize, so that it can be seen without turning away,
There are two types of rearview mirrors that are installed to provide drivers with an easy-to-see view: outside mirrors that are installed on the outside of a car or on the door, and inside mirrors that are installed near the driver's eyes inside the car.

By the way, the light of the sun at a low altitude in the morning and evening and the 16P at night
When the light from the headlights of a VC car enters the rearview mirror, the strong reflected light from the vehicle enters the driver's eyes, which is dangerous as the driver is likely to be dazzled. Therefore, as a countermeasure to this problem, it is desirable to apply anti-glare treatment to the rearview mirror.

Conventionally, there is an anti-glare inside mirror shown in FIGS. 1 and 2 as a rearview mirror to which this type of treatment has been applied. This mirror utilizes the difference in reflectance between the front surface and back surface reflection of a prism, and during the daytime, the back surface has a reflectance of about 85 times, and at night, it uses the front surface with a reflectance of about 4 times. It has a structure that allows you to see the situation behind you by switching the reflectance between two levels. In other words, at Y in the figure, mirror 2 of the anti-glare inside mirror 1 installed on the ceiling above the city driver's seat.
is a prism, which is tilted up and down by the prism angle - with respect to the front surface 3ti and the back surface 4, and the back surface 4 is provided with a reflective layer 5 on which a highly reflective metal film such as aluminum or silver is deposited to form a reflective surface. It is formed.

Kei ffJj (1st [) company, human figure 4 light kasuri a from the other side of the vehicle]
Among them, nine anti-lateral rays α are reflected by the reflective surface of the back surface 4 and enter the eye, but the reflected light rays 11 m,
Of the incident rays β with different angles of incidence than the incident ray α, the reflected rays I on the surface 3 do not enter the eye. The reflected light 1p
It catches the eye like az, but both reflected light m town and! There is a large difference in the reflectance of , and the reflected light ray / is greatly attenuated, so the single visible image is a double copy of the turtle and the turtle due to the reflected light 11α, which has a high reflectance. It will never be K.

At night (Fig. 2), the driver is dazzled by the reflected light from the headlights of the following car that is reflected by the back surface 4@reflective surface with high reflectivity, so to avoid this, prism #2 is used. It is rotated in the vertical plane by the anti-glare switching angle -' to the power of 14@. Then, of the incident light l1g from the headlight, the portion reflected by the rear surface 4, which has a high reflectance, becomes reflected light a.
, and does not enter the eye, and only the weak reflected light 11a4 that is ν@, + and reflected by the large width 'VC,w on the surface 3 with a low retraction rate enters the eye, so no dazzling occurs.

In this case, there is another incident light beam 1sa from a direction A that is somewhat different from the incident light beam 1sa.
The prism angle a of the mirror 2 and the anti-glare switching angle - are set so that the reflected light beam β on the lateral F surface enters the eye together with the reflected light @d, and the direction A is near the dark ceiling of the vehicle. Since it is adjusted and set, the reflected light @/ is even weaker than the reflected light α4 (α,〉β,), and therefore 11
The viewer will only be able to see the isthmus image caused by the reflected light ray α.

However, with such a conventional anti-glare mirror, when it is set outside the vehicle and used as an outside mirror, the direction A, which is different from the incident light beam from the headlights of the following vehicle, is The direction of the dark ceiling inside is different from the direction of the relatively bright outside of the car. This relatively bright light outside the vehicle (sometimes particularly bright light such as outside lights, interior lights, advertising lights, etc.)
/ is reflected by the back surface 4 @ reflective surface with high reflectance, and the reflected light #/ is stronger than the reflected light name g4 of the headlight, which is reflected by the surface 3 with low reflectance and is greatly attenuated. (a4
〈β〉 is included. Therefore, there was a point W during which information about the following vehicle was obstructed by the reflected light beam β from another direction, and the driver could no longer see it, and the mirror no longer functioned as a rearview mirror.

This invention was made by focusing on such a conventional excitation point, and by interposing a 1/C111 layered light-shielding plate between the prism acid and the reflective film, strong incident light rays can be blocked during anti-glare use. The purpose of this invention is to solve the above-mentioned problem by blocking the incident or reflected light rays from the back false reflective surface, which has a high reflectance, and thereby preventing them from reaching the eye point.

Hereinafter, this invention will be explained based on FIG. 1iK.

FIGS. 3 to 7 are diagrams showing an embodiment of the present invention. Note that the same reference numerals are given to the same or equivalent parts as in the conventional art, and the explanation thereof will be omitted.

First, to explain III 1, in the fIP3 diagram and Figure 4, 10 is the pack mirror, 11 is the main body of the mirror, and 12
The main body 11 of this mirror is rotatably supported by a support shaft 13 for storage, and 14 is a housing for storing the mirror body 11 in the non-dimming state (Fig. 4 (Hata)) and in the non-dimming state (Fig. 14 (b)). This is the anti-glare switching lever that rotates the mirror body 11 by the glare switching angle C'. The mirror main body 11 has a triple structure in which, in addition to the prism 2 and the reflecting surface similar to the conventional one, a light shield [15] is interposed between the two. This light-shielding plate 15 has a light-shielding interface that breaks with the reflective surface, and is, for example, a laminated flat plate made by butting and joining each side of a rectangular parallelepiped transparent acrylic resin thin plate 15m whose longitudinal direction is the vertical direction. A light-shielding interface 15b is formed on each joint surface using a black film having a thickness of 0.01 t for absorbing light. Each light shielding interface 15b
, 15b (i.e. rectangular parallelepiped acrylic plate 15a
The width W) and the thickness D of the light shielding plate 15 (that is, the thickness of the acrylic plate) are I! 77 Considering the field of view, such as the angle of incidence of incident external light, which affects the anti-glare effect during dazzling, the thickness is D-0,7.
6! IJ, width W-0, 1t9. That is,
Among the strong incident light rays during anti-glare, the incident or repulsed light rays on the back side reflective surface 5', which has a high repulsion rate due to the reflective film 5, are as follows:
This makes it possible to block light that exceeds a certain angle of incidence or angle of retraction. In this case, the angle formed by the four angles of the human body and the reflection angle is within 90°.

Next, the action will be explained.

Figure 5 illustrates a case where the anti-glare rearview mirror 10 of this embodiment is applied to a door mirror, which is an outside mirror. Note that in the following discussion, refraction of light rays is ignored.

When the glare is not dimmed (daytime), the main body 11 of the main body 11 is set to match the reference line SK, as shown in FIG. 6(a). In this case, the incident light S- from the rear view of the vehicle is reflected by the back surface 5' with a high reflectance, and is passed through a strong reflected optical path a that is not significantly attenuated. can clearly see Ikata information. Among the incident light @α, the surface reflected light fj reflected by the table 1io3 of the prism mirror 2 is the reflected light ray α.

Since the reflection angle is larger, it does not reach the eye main point PK, and therefore a double image does not occur.

When anti-glare (at night or in the morning and evening), 6th W (b) and #17
As shown in the figure, the mirror main body 11 is set by rotating it by an anti-glare switching angle #I with respect to the reference fIIS. In this case, the incident light from a strong light source such as the headlight of a car or sunlight is repulsed by the surface 3 of the prism 12 with low reflectance, and the surface reflected light 11g is attenuated by a large IKIK. , iPoint) PK is reached, so the driver can check rearward information without being dazzled. On the other hand, incident light 1
In the conventional case, the part of j* that travels inside the prism #2 toward the reflective surface 5' is directly reflected by the back reflective surface, which is different from the surface reflection 1 light a. Path reflected ray a.

However, in the anti-glare pack seller of this invention,
For example, Figure 7'KIl! As shown in the formula, the light shielding plate 15
After entering the acrylic plate 15a, it hits the light-shielding interface 15bk, where it is collected (or alternatively, the reflection surface 5
After reaching I and being reflected, it hits the II optical interface 15b and is absorbed), and is blocked.

In addition, other light sources (e.g. outside lights, advertising lights, soft lights, etc.
For strong incident light 114 from the above-mentioned opening,
The acrylic plate 5 of the light shielding plate 15 moves through the prism-2.
The light inside a is absorbed by the light-shielding interface 15b and is blocked. Therefore, according to the anti-glare rearview mirror of the present invention, not only when it is used as an inside mirror inside the car, but also when used as an outside mirror outside the car, the driver is not dazzled as in the conventional case. This will not cause the mirror to stop functioning as an anti-glare mirror.

In addition to Ueto's embodiment, it is also possible to create the light-shielding interface 15b by cutting a large number of extremely thin slits in a layered manner in a transparent acrylic plate, and forming a light-shielding interface made of light-absorbing paint on the slits. It will be done.

In addition to the acrylic board, the light shielding plate can also be made of acetic acid/butyric acid hetamine.Also, the laminated light shielding plate can be made of K11 as shown in Figure 8.
It is also possible to further cover iii with light shielding plates 15c and 15C.

As described above, according to the present invention, in an anti-glare rearview mirror in which a reflective film is provided on the back side of a prism to form a reflective surface, the structure is such that the structure is such that a reflective film is provided on the back side of a prism to form a reflective surface. A laminated V light-shielding plate is formed on the surface of the mirror, and among the strong incident light rays when using anti-glare, the light rays incident on or reflected from the reflective surface on the back side are blocked to prevent them from reaching the eyelid. The unique anti-glare rearview mirror has the effect of providing sufficient anti-glare function not only when used inside the vehicle but also when used outside the vehicle.

[Brief explanation of the drawing]

Figure s1 is an explanatory diagram of the function of a conventional anti-glare inside mirror during daytime, and Figure 2 is a branch of Figure 1 during nighttime. #Explanatory drawing, FIG. 3 is a front view of an embodiment according to this invention,
Figure 4 is a cross-sectional view taken along the N-mV line in Figure 3, (a) shows the non-dimming state, (b) shows the anti-glare state, and Figure 5 shows the application of the thing shown in Figure 3 to an automobile door light. Partially omitted plan view, 6th blur, Functional summary explanatory diagram of what is shown in Figure 3. (a) is when non-dimming,
(b) shows the time of anti-glare, 7th v! A partially enlarged view of JFi FIG. 6(b) and FIGS. 11 to 8 are views showing other examples of the light shielding plate. 2 - Prism - 3 - Surface (of the prism) 5 - Reflection surface 10 - Anti-glare rearview mirror 15 Series of light plates α,!・-Large side light beam 1"ffi・-Reflected light beam P-・Eye lint

Claims (2)

[Claims] (1) In an anti-glare grasshopper mirror in which a reflective adhesive is provided on the back side of a prism lock to form a reflective surface, a glaze layer-like light-shielding plate is formed between the prism and the reflective surface on the back side to provide an anti-glare grasshopper mirror. An anti-glare rearview mirror characterized in that, among strong incident light rays during use, the light rays incident on or reflected from the rear reflective surface are blocked. (2) The anti-glare rearview mirror according to claim 1, wherein the laminated light-shielding plate forms a light-absorbing light-shielding interface on each joint surface that intersects with the back reflecting surface. .