JPH0446975Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a vanity mirror for an automobile with a built-in lighting device.

[Conventional technology]

Conventionally, vanity mirrors for automobiles have been put into practical use, as shown in Japanese Utility Model Application Publication No. 56-22117, etc., which have a built-in light source to provide hand illumination at night. 3 and 4 show a conventional example in which such a vanity mirror is incorporated into a sun visor, which is briefly described as follows: 2 is a sun visor main body, 3 is a case disposed at the center of the surface of the sun visor main body 2; 4 is a cosmetic mirror that covers the opening provided in the center of the entire surface of case 3, and 5 is case 3
A pair of left and right front lenses 6 cover openings provided on both sides of the front surface, and 6 is a light source that is housed in the case 3 and illuminates the front lens 5 from behind. A lens step 8 is formed which diffuses the light, thereby allowing a wide range of illumination.

Reference numeral 9 designates a lid body that can be opened and closed to cover the entire surface of the case 3 and protect the mirror 4 and front lens 5 when not in use, and 10 and 11 designate hook-and-loop fasteners.

[Problem that the invention attempts to solve]

However, such a conventional vanity mirror 1 has a problem in that the light diffused by the lens step 8 is strong, dazzling the driver and making it difficult to visually recognize the mirror 4.

In addition, a miniature light bulb is generally used as the light source 6, but since a miniature light bulb is a point light source, the surface lens 5
The area corresponding to the light source is particularly brightly illuminated, and there is a large difference in brightness from other areas.
There is a problem with uniform illumination.

Therefore, as a way to solve this problem, for example, a light guide plate larger than the mirror is arranged on the back of the mirror, and the light emitted from the light source is guided into the light guide plate and directed to the side of the mirror of the light guide plate. A vanity mirror that provides indirect illumination by emitting light forward from the protruding periphery (1983-
100815) has been proposed. Although this type of mirror has the advantage of providing soft light and improving the visibility of the mirror, it requires the light source to be placed behind the light guide plate, which inevitably increases the thickness of the vanity mirror. However, there was a problem in that there were restrictions on the installation inside the car.

Therefore, the purpose of this invention is to solve the above-mentioned problems and provide a vanity mirror for automobiles that can uniformly illuminate the entire lens surface, improve the visibility of the mirror, and can be made thinner. It is something to do.

[Means for solving problems]

In order to achieve the above object, the present invention arranges a mirror and a front lens in parallel on the surface of the sun visor body, and a light guide plate whose plate thickness decreases from one end to the other end on the back side of the front lens. A light entrance part is provided on one end face of the light guide plate, a linear light source is arranged in the light entrance part, and stipples are formed on the back surface of the light guide plate so that they become more dense as the distance from the light source increases. and a reflective surface is formed on the surface of the sun visor body corresponding to the light guide plate.

[Effect]

In the present invention, light emitted from a linear light source enters the light guide plate and exits from the surface thereof. Therefore,
The linear light source and the light guide plate form a surface light source. Stipple is
The light emitted from the linear light source and entering the light guide plate from the light input portion is reflected forward. The reflective surface reflects the light emitted to the back side of the light guide plate and causes it to enter the light guide plate again.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 is a sectional view taken along the line shown in FIG. 2, showing an embodiment of the vanity mirror for an automobile according to the present invention, and FIG. 2 is a front view of the same vanity mirror. Components and parts that are the same as those in FIGS. 3 and 4 are designated by the same reference numerals, and their explanations will be omitted. In these figures, a cover 3 and a body 20 are arranged at the center of the surface of the sun visor body 2, and a mirror 4 and a front lens 5 are arranged in openings 21 and 22 provided on the surface of the cover 3, respectively. There is.

The front lens 5 is colorless and transparent or colored pale blue, and a peripheral wall 5A is integrally provided around the entire circumference at the rear peripheral edge, and is fitted and fixed in the opening 22. On the back surface of the front lens 5, a translucent milky-white diffuser plate 23 and a light guide plate 24 are arranged in an overlapping manner. The diffusion plate 23 is made of acrylic resin or ground glass, and is fitted and fixed to the rear opening of the front lens 5.

The light guide plate 24 is made of colorless and transparent acrylic resin or the like, and is housed in a housing recess 25 formed in the surface of the body 20. A light entrance part 26 consisting of a substantially semicircular groove is formed on the end surface of the light guide plate 24 on the side of the mirror 4 over the entire length, and a discharge tube 27 forming a linear light source is inserted into this light entrance part 26. There is. In this embodiment, the discharge tube 27 is
A glow lamp with high brightness (brightness of 8000 nits or more) and white emission color is used. The light guide plate 24 has a wedge-shaped cross-sectional shape, with the plate thickness being thickest at the end on the side of the light entrance part 26 and gradually becoming thinner as it goes away from the light entrance part 26. A large number of stipples 28 consisting of conical recesses are provided. The stippling 28 increases the density of the stippling as it moves away from the light entrance part 26 in order to make the amount of light that comes out from the discharge tube 27, passes through the light guide plate 24, and exits forward from the surface thereof substantially equal over the entire surface. It is formed so that Further, a white sheet 29 (or white paint) is attached to the bottom surface of the storage recess 25 to form a reflective surface. Openings 21 and 22 of the case 3 on the surface of the body 20
A light shielding sheet 3 is placed in the area corresponding to the area between
This prevents the light emitted from the discharge tube 27 from leaking to the outside through the gaps between the openings 21 and 22, the mirror 4, and the front lens 5.

The cover 3 is fixed to the surface of the body 20 by ultrasonic welding or the like, and the mirror 4 is held between these two members. An inverter 31 for the discharge tube 27 is disposed on the back surface of the body 20.

In the vanity mirror for an automobile having such a configuration, light that comes out of the discharge tube 27 and enters the light guide plate 24 through the light entrance part 26 is reflected by hitting the stippling 28 and exits from the surface of the light guide plate 24 to the outside and is diffused. Board 2
3. Therefore, the discharge tube 27, which is a linear light source, is converted into a surface light source, which passes through the surface lens 5 and indirectly illuminates the face with faint light. Furthermore, by changing the density of the dots 28 and effectively diffusing the dots 28 by the diffusion plate 23, the brightness becomes approximately uniform over the entire surface. Also,
Although the discharge tube 27 has high brightness, the white light is sufficiently diffused as described above, so there is less glare and the mirror 4 can be easily recognized.
Furthermore, since the illuminance is sufficient and there is no uneven illumination, the face can be effectively illuminated.

Furthermore, although the discharge tube 27 is rod-shaped and long,
Since it is arranged on one side of the light guide plate 24,
Vanity mirrors can be made thinner than those using conventional light bulbs.

Note that in the above embodiment, the front lens 5 and the light guide plate 24 are
Although the example in which the diffuser plate 23 is interposed between the
The present invention is not limited to this in any way; if the back surface of the front lens 5 is frosted or textured to provide the lens itself with a diffusion function, the diffusion plate 23 is not necessary.

[Effect of idea]

As described above, according to the vanity mirror for an automobile according to the present invention, the light emitted from the linear light source and entering the light guide plate from the light input part is reflected by being stippled, and is reflected on the back side of the light guide plate. Since the emitted light hits the reflective surface and is reflected and re-enters the light guide plate, the light utilization efficiency is high and the front lens can be well illuminated from the rear. In addition, the light guide plate converts light from a linear light source into a surface light source, so indirect illumination light with soft, bright, and uniform brightness is obtained, reducing glare and preventing dazzling. , the mirror is easy to see. In addition, without the glare, the sense of calm and luxury increases, and the discharge tube has great practical effects, such as realizing a thinner vanity mirror.

[Brief explanation of the drawing]

FIG. 1 is a sectional view taken along the line 2--FIG. 2 showing an embodiment of an automobile vanity mirror according to the present invention, FIG. 2 is a front view, and FIGS. 3 and 4 are perspective views showing an example of a conventional automobile vanity mirror. Figures and −
FIG. 2... Sun visor body, 3... Case, 4...
Mirror, 5...Surface lens, 6...Light source, 20...
... Body, 21, 22 ... Opening, 23 ... Diffusion plate, 24 ... Light guide plate, 25 ... Storage recess, 26 ...
...Light entrance part, 27...Discharge tube, 28...Stippling.

Claims (1)

[Scope of utility model registration request] A mirror and a front lens are arranged in parallel on the surface of the sun visor body, and a light guide plate whose plate thickness decreases from one end to the other end is arranged on the back side of the front lens. Provide a light entrance part,
A linear light source is disposed in this light entrance part, stipples are formed on the back surface of the light guide plate so that they become denser as the distance from the light source increases, and a reflective surface is formed on the surface of the sun visor body corresponding to the light guide plate. An automobile vanity mirror characterized by forming.