JPS5835803A - Lamp apparatus 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 wheel lamp, and more particularly to a vehicle lamp in which a light source is disposed within a lamp chamber defined by a nozzle and a lens disposed in front of the lamp.

Conventionally, this type of vehicle lamp has a light chamber defined by a paraboloidal reflecting mirror a, a lens C disposed in front of the reflecting mirror a, and a lens C disposed in front of the reflecting mirror a. A light source e is disposed within the space d. However, in a vehicle lamp having a built-in reflector a like such a conventional lamp, the emitted light from the light source 6 is emitted from the parabolic shape using the luminous flux within the range of angle σa and angle ab as shown in the figure. A fisheye prism +A formed on the inner surface of lens 0 by making light incident on the reflection mta of
Since the light is focused by f and a desired light distribution pattern + is observed, at 1iJ in the daytime), external light such as sunlight 0 that falls at one point iIA ray passes through lens C and becomes light 'McL'. The light enters the interior of the housing b and is reflected by the reflection light 1ia provided in the housing b, resulting in reflected light indicated by a broken line. This reflected light has a regular reflection component and a diffuse reflection component, but even if the deviation is %, the light reflected forward passes through the lens C again and is emitted to the outside. This emitted light makes it appear as if the lamp was on when it was turned off. In this way, it is difficult to distinguish between when the lights are on and when they are off.
This is not only extremely dangerous for signal lights that provide information by visually recognizing the necessary signal display when turned on, but also has poor visibility. Therefore, there is a problem that the function as a signal light or the like cannot be achieved.

In view of the above-mentioned conventional drawbacks, the present invention is a novel method that increases the ratio of lamp brightness between when the lamp is turned off and when it is turned on, thereby making the difference between the two lamps more noticeable, thereby improving visibility and increasing safety. The purpose is to provide lighting equipment for vehicles.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the implementation of a vehicle lamp according to the present invention will be described below with reference to the accompanying drawings.

A first embodiment of the present invention is shown in FIGS. 2 to 4, in which the present invention is applied to a rear signal light for an automobile. Reference numeral 1 denotes a housing made of synthetic resin or the like, and a light source 6 is connected to a holder 62 through a socket 61 in a lamp 10 defined by an outer lens 2, an inner lens 5, and K disposed on the front surface of the housing 1. It is installed and placed.

The outer lens 2 is made of smoked material, such as acrylic resin or polycarbonate resin mixed with carbon black, so as to absorb and cut external light such as sunlight and transmit the light from the light source 6 to the outside. It is a clear smoked lens.

Further, the inner lens 3 has a condensing prism part 31 such as a fisheye prism or cylindrical formed on the outer surface thereof, and a condensing prism part 31 such as a fisheye prism or cylindrical prism part 31 is formed on the inner surface (light source side), and a central part near the optical axis X (lamp reference axis) facing the light source 6 is formed on the inner lens 3. The part 7 includes a Fresnel prism part 32 that refracts the forward light emitted from the light source 6 into a ray substantially parallel to the optical axis X.
is formed, and furthermore, a curved reflective surface 5 disposed on the inner surface of the housing 1, which will be described later, is formed on the outer peripheral portions 8 and 9 of the surrounding area.
Fresnel beam portions 33 and 54 are formed to control the refraction of the reflected light from (51° 52) into a beam substantially parallel to the optical axis X.

Curved reflective surfaces 5 (51, 52) are arranged on the inner surface of the housing 1 corresponding to the outer peripheral portion 8.9 of the inner lens 3 that is far from the light source 6. Further, an optical lens a (41, 42) is arranged on the side of the light source 6 so as to focus the side light emitted from the light source 6 toward the entire area of the curved reflecting surfaces 51 and 52 on both sides. It is composed of -.

More specifically, as shown in the illustrated example, the optical lens 4 (41, 42) is arranged such that the right optical lens 41 and the left optical lenses 4 and 2 are arranged on both sides of the light source 60 in approximately 1,000 lines with respect to the optical axis X within the housing 1. It is fixed and disposed by appropriate means.

Also, optical lenses 41 disposed on both sides of the light source 60.
42 is a Fresnel crab on its inner surface (light source side) K centered around the horizontal axis Y of the light source 6 perpendicular to the optical axis X.
a, 42m are formed, and these Fresnel cut portions 41a, 42& refract the light emitted from the light source 6 into rays approximately parallel to the horizontal axis Y of the light source 6, and form curved surfaces arranged in the housing 1. It is configured so that light enters the entire area of the reflecting surfaces 51 and 52.

Note that the Fresnel cut portions 41a and 42a are not limited to being formed on the inner surface of the optical lens 41, 42, but may be formed on the outer surface. In this case, the side light emitted from the light source 6 is directed to the inner surface. light source 6.
This makes it possible to effectively utilize the luminous flux without losing side light.

The curved reflective surface 5 (51, 52) is connected to the light source 60.
As shown in the figure, the inner surface of the housing 1 is configured with a curved reflective surface 51 on the right side and a curved reflective surface 52 on the left side, corresponding to the left and right optical lenses 41 and 42 disposed on both sides. There is. The curved reflecting surfaces 51.52 on both sides condense the emitted light from the left and right optical lenses l' 41.42 toward the entire area of the outer circumference 8.9 of the inner lens 3. The inner surface of the housing 1 is formed into a curved shape to allow the light to be incident thereon, and a reflective film is deposited thereon.

It is also a good idea to have a separate reflecting mirror arranged on the inside of the housing.

With the above configuration, when the lights are off, the outer lens 2 made of smoked material absorbs and cuts most of the external light 8 such as sunlight shown by the dashed line as shown in FIG. The other part of the light rays that passed through the inner lens 3 and entered the lamp 7M10 are reflected by the curved reflecting surfaces 51 and 52 as shown by the broken lines, and part of them passes through the inner lens 3 and returns again. The solar reflected light S' that is about to be emitted to the outside is directed toward the outer lens 2, but the outer lens 2 made of this smoked material absorbs and cuts most of the amount. Therefore, the external light S such as sunlight and the solar reflected light S' entering the lamp are smoked lenses made of smoked material. Outer lens 2 can actually absorb and cut $.

- When the light is on, the forward light emitted from the light source 6 is directed to the inner lens 3 as shown by the solid line in the figure, as shown in Figure 3.
The angle 11? is refracted by this Fresnel prism portion 52 into a ray approximately parallel to the optical axis X, and the ray t'! ! The light passes through the wall thickness, passes through the outer lens 2 by the five condensing prisms 31 on the outer surface, is refracted and emitted so as to be condensed in front of the lens. Also, the side light emitted from the light source 6 is within the range of angle ai on the right side and angle as on the left side as shown in the figure.

The luminous flux in the range 4! a, this Fresnel cut part 4
1a and 42a, the light beams are refracted into light rays that are substantially parallel to the horizontal axis Y of the light source 6, and are transmitted through the wall thickness and emitted from the outer surface, and then enter the curved reflecting surfaces 51 and 52 on both sides, and then enter the inner lens. 3, outer peripheral parts 8, 9 far from the light source 6
A large amount of reflected and focused light is incident on the Fresnel prism portions 55 and 54 formed on the inner surface of the lens. Then, the light is refracted by each of the 7 Lennel prism parts 33° 54 into a ray substantially parallel to the optical axis X, passes through the wall thickness, passes through the actor lens 2 by the condensing prism part 51 on the outer surface, and reaches the front of the lens. Refraction is controlled so that the light is condensed, and a desired light distribution pattern can be obtained.

Therefore, in the vehicle lamp of the present invention, among the light emitted from the light source 6, a large amount of direct light in the range of angle IIr is directed to the 7-Lesnel prism portion 32 formed in the center portion 7 of the inner lens B. As the side light enters, as shown in the figure, the light flux in the range of angle gi on the right side and the range of angle ai on the left side is from the light source 60.
Left and right optical lenses 41.42 arranged on both sides and curved reflective surfaces 51.52 corresponding to the optical lenses 41.42K
A large amount of light beam can be made incident on the 7-Lesnel prism portions 55 and 54' of the outer peripheral portions 8 and 9 of the thinner lens 3. Therefore, the angle of the emitted light from the light source 6 is -; 10 g;
Moreover, a large amount of light with a high luminous flux density is emitted from the condensing prism section 31 on the outer surface, and a part of it is attenuated by the outer lens 2, which is a smoke lens made of smoked material. #1 The amount of emitted light remains unchanged and contributes to light emission, making the lens surface brightness uniform and ensuring visibility.

5 to 7 show another embodiment of the present invention, in which the actor lens 2o of this embodiment is composed of a smoke lens with a condensing prism section 21 formed on the inner surface, while the inner lens 3o A flat surface is formed on the outer surface, and Fresnel prism portions 52, 55, and 54 are formed on the inner surface in the same manner as in the previous embodiment.

Note that this example has the same effects as the above-mentioned example. Also, in this example, the Fresnel prism portions 32, 35.
34 may be formed on the outer surface.

According to the configuration described in detail above, even if extraneous light such as sunlight is incident when the lights are turned off, that light is hardly emitted to the outside. Therefore, the problem of giving an impression as if the lights were on even when the lights are off can be solved. Moreover, when the light source is turned on, a part of the total light intensity of the light source is attenuated by the outer lens of the smoke lens, but despite the existence of the smoke lens, most of the output light intensity contributes to light emission, and by effectively utilizing the light flux of the light source. The lens surface brightness can be made uniform, so visibility is good, and at the same time, there is no noticeable difference between when the light is turned off and the vA is not recognized, so the display function as a signal light can be properly achieved. It has the effect of being able to do things.

Incidentally, without being limited to the above-mentioned embodiment, the optical system including the optical lens 4 and the curved reflective surface 5 may be arranged on the upper, lower, left, right, etc. of the side of the light source 6 depending on the shape of the lens. It is something.

As is clear from the embodiments described above, the wheel lamp of the present invention is a lamp in which a light source is disposed within the illumination defined by a housing and an outer lens and an inner lens disposed on the front surface of the housing. The outer lens is formed of a smoked lens so as to absorb and cut external light such as sunlight and transmit light from the light source to the outside, and a condensing prism is provided on the inner surface of the outer lens or the outer surface of the inner lens. The inner lens forms a 7-Renel prism part in the central part facing the light source that refracts the forward light from the light source into rays substantially parallel to the optical axis, and the outer peripheral part around it corresponds to the outer peripheral part. A 7-rennerve that refracts light from a curved reflecting surface disposed on the inner surface of the housing into a ray substantially parallel to the optical axis:
'A rhythm part is formed, and /
The light source is characterized in that an optical lens is disposed on the side of the light source so as to focus the side light from the light source.1
When the light is on, the angle of the front light and side light emitted from the light source is gl.

Luminous flux in the range of 10 α; 10 g; can be used effectively, and a large amount of light with high luminous flux density can be incident on the outer lens Wako, which is a smoked lens, and some of the light is attenuated by the smoked lens. Despite the presence of the smoke lens, most of the emitted light can contribute to light emission, and the lens surface brightness is uniform, and even during the daytime when the lights are off, the outer lens, which is a smoke lens, prevents sunlight, etc. External light is prevented from entering the lamp violet and the incident light is prevented from re-emitting from the lens surface by the curved reflective surface,
As a result, the difference in lamp brightness between when the lamp is off and when it is on becomes large, and there is no possibility of misidentifying the lamp as being on when it is off.
This has the effect of achieving good visibility with high safety.

[Brief explanation of the drawing]

FIG. 1 shows a sectional view of a conventional lamp, FIGS. 2 to 4 show a first embodiment of a vehicle lamp according to the present invention, FIG. Partial cross-section of the line,
FIG. 4 is a partial sectional view taken along line BB@ in FIG. 2, and FIGS. 5 to 7 show a second embodiment of the vehicle lamp of the present invention.
5 is a front view, FIG. 6 is a partially broken sectional view taken along line a-C in FIG. 5, and FIG. 7 is a partially broken sectional view taken along line DD in FIG. 5. 1... Housing, 2.20... Actor lens,
3.50...Inner lens, 21.31...Condenser prism section, 32°S 55,34...7 Lenel prism section, 4 (41,42)...Optical lens, 5 (5
1,52)...Curved reflective surface, 6...Light source, 7.
...Medium heat part, 8.9...Outside part, 10...Tofu,
x...optical axis. Patent applicant: Ichikoh Industries Co., Ltd. Agent Masami Akimoto Masami

Claims (1)

[Claims] This is a lamp in which a light source is disposed within a lamp chamber defined by a housing, a book-lens disposed in front of the housing, and an inner lens, and the outer lens absorbs and cuts external light such as sunlight, and the light source A smoked lens is formed so as to transmit light from the outside to the outside, and a condensing prism part is formed on the inner surface of the outer lens or the outer surface of the inner lens, and the inner lens has a central part facing the light source with a light condensing prism part formed in front of the light source. A Fresnel prism part that refracts light into a ray substantially parallel to the original axis is formed, and the light from a curved reflecting surface disposed on the inner surface of the housing corresponding to the outer peripheral part is formed around the Fresnel prism part, and the light is directed to the optical axis. A Fresnel prism part that refracts substantially parallel light rays is formed, and an optical lens is disposed on the side of the light source so that the side light from the light source is focused on the entire area of the curved reflection circle. Lighting equipment for vehicles.