JPS5835806A - 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 vehicular lamp, and more particularly to a vehicular lamp in which a light source is disposed within a lamp chamber defined by a housing and a lens disposed on the front surface of the housing.

This type of vehicular lamp conventionally has a light chamber defined by a housing b provided with a parabolic reflector a and a lens C disposed in front of the housing b, as shown in FIG. Light source e within d
is installed. However, in a vehicular light that has a built-in reflector a like this conventional light, the light source e
As shown in the figure, the emitted light is incident on the parabolic reflecting mirror 1 using a luminous flux within the range of the angle Waa and the angle αb, and is reflected by the reflecting mirror a into a ray substantially parallel to the optical axis X. Since the light is collected by the fisheye prism part f formed on the inner surface of the lens C to obtain a desired light distribution pattern, during the daytime, external light S such as sunlight shown by the dashed line passes through the lens C. The light enters the lamp chamber d and is reflected by a reflecting mirror a provided in the housing b, resulting in reflected light shown by a broken line. This reflected light has a specular reflection component and a diffuse reflection component, but even at -fFL, the light reflected forward is from the lens c.
The light passes through the water and is emitted to the outside. This emitted light makes it appear as if the lamp is on even when it is off. In this way, it is difficult to distinguish between when the lights are on and when they are off, which is not only extremely dangerous for signal lights that provide information by making the signal display visible when the lights are on, but also has poor visibility. be. 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 increases the ratio of lamp brightness between when the lamp is off and when it is on to make the difference between the two noticeable, thereby improving visibility and providing a novel vehicle with high safety. The purpose is to provide lighting equipment for

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.

Embodiments of the present invention are 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, into which a light source 6 is mounted in a socket 61 in a light chamber 10 defined by a lens 2 disposed on the front surface of the housing 1. There is one hot water placed in the room.

The front lens 2 has a direct ray system that refracts the forward light emitted from the light source 6 into a ray substantially parallel to the optical axis X inside the central portion 7 near the optical axis (reference axis of the lamp) facing the light source 6. An inner lens 3 having a prism portion 31 formed therein is provided. Further, a multi-stage reflective section 5 includes a plurality of reflective surfaces 51a and 52a provided in a stepped manner on the inner surface of the housing 1 so as to correspond to outer circumferential parts 8 and 9 far from the light source 6, which are around the central part 70 of the front lens 2. (51, 52) are arranged. Further, each optical lens 4 is provided on the side of the light source 6 so as to allow light to enter the entire area of each of the multi-stage reflection sections 51 and 52 on both sides.
(41, 42) are arranged.

Further, a condensing prism element 21 is provided on the inner surface of the front lens 2.
The surface (outer surface) is provided with each transmitting part n at each light condensing part generated by each prefectural light prism element 21, and an opaque or translucent part is provided in the part other than each transmitting part. It is constructed by providing a light shielding device.

More specifically, as shown in FIG. 3, the optical lens 4 in this example is suitably installed in the housing l so that a right optical lens 41 and a left optical lens 42 are arranged on both sides of the light source 60 to be approximately parallel to the optical axis X. Each optical lens 4] is fixedly arranged by means, and is arranged on both the left and right sides.
42 has a Fresnel cut 41a on its inner surface (light source side) centered on the horizontal axis Y of the light source 6 perpendicular to the optical axis X, respectively.
42m is formed.

Note that the Fresnel cut portions 41a and 42m are the light source 6.
The side light emitted from the housing 1 is refracted into light beams substantially parallel to the horizontal axis Y, and the light beams are incident on the entire area of the multi-stage reflecting sections 51 and 52 provided in the housing 1. Note that Fresnel cut portions 41a formed on the inner surfaces of each optical lens 41 and 42
Even if +42m was formed on the outer surface, it would be inconvenient.

The multi-stage reflective surface portion 5 corresponds to the optical lenses 41 and 42 disposed on both sides of the light source 6, and also corresponds to the outer peripheral portions 8 and 9 of the front lens 2 in the housing 1.
A plurality of reflective surfaces 51a, 51a..., are respectively provided on the inner surface of the
52m, 52a, . . . each multistage reflecting section 51 is arranged in a sawtooth shape.
゜52. Further, each of the multi-stage reflection sections 51 and 52 corresponds to the left and right optical lenses 4] and 42.
A multi-stage total reflection surface is formed on the inner surface of the housing l so that the emitted light from the front lens 2 is directed to the entire area of the outer circumferential parts 8 and 9 of the front lens 2, and the reflected light is focused substantially parallel to the optical axis X. A reflective film is deposited on the surface. It goes without saying that a separate reflecting mirror may be provided.

Furthermore, as shown in the illustrated example, the front lens 2 has a condensing prism element 21 formed in a fish-eye shape on its inner surface, and a transmitting portion is formed at a position corresponding to the portion where light is condensed by the condensing prism element 21. It will be done.

Moreover, a light shielding body n is formed in a band shape on the surface other than the portion where the transmitting portion n is located. This light shielding body 22 is made of an opaque or translucent member, and is formed integrally with the front lens 2, for example, but it can also be formed integrally or separately by other means such as mask printing. is also good. In addition, each condensing prism element 21 is arranged on the inner surface of the front lens 2.
and the front light shield n are designed so that the light collected by each converging prism element 21 is reliably focused on each transmitting part so as not to cause loss of light due to hitting the front light shield n. It is formed with a set curvature.

With the above configuration, when the lights are turned off, as shown in FIG. 4, the external light S such as sunlight shown by the dashed line is reduced or blocked by the light that enters the light shield n of the front lens 2. , the other part enters from the transmission part η, passes through the inner lens 3, and enters the lamp chamber 10. As shown by the broken line, the light rays are reflected by the multistage reflection parts 51 and 52, respectively, and are reflected again. A part of the solar reflected light S' that is about to be emitted to the outside is blocked by the light shielding member B of the outer lens 2, and only the other part is emitted to the outside through the transmitting portion. Therefore, almost all of the external light S such as sunlight and the solar reflected light S' entering the lamp chamber can be attenuated or blocked by the light shielding member n. In addition, in order to increase the area occupied by the light shielding member n of the front lens 2, for example, if the light shielding member n for reducing or blocking light is formed in a lattice shape, the area of the transmitting portion can be further reduced. , external light S such as sunlight, and solar reflected light S' can be further cut.

On the other hand, when the light is turned on, the forward light emitted from the light source 6 as shown in FIG. The light enters a range of angle αV of the direct prism section 31 on the inner surface, is refracted by the direct prism section 31 into a ray substantially parallel to the optical axis X, and is transmitted through the thickness of the front lens 2.
incident on .

This incident light is condensed by each condensing prism element 21 onto the transmitting portion B, and is emitted to the front of the lens. Therefore, no light enters the portion of the light shielding member n of the front lens 2 and is not attenuated or blocked.

Also, as shown in the figure, the side light emitted from the light source 6 is formed within the range of angle α on the right side, and the light flux within the angle α on the left side is formed on the inner surfaces of the right optical lens 41 and the left optical lens 42, respectively. The light enters the Fresnel cut portions 41a and 42m, is refracted into light rays substantially parallel to the horizontal axis Y of the light source 6, and is transmitted through the wall thickness from the respective outer surfaces to the multi-stage reflecting portions on both sides disposed on the inner surface of the housing 1. It emits toward the entire area of 51 and 52. Then, the light beams incident on each total reflection surface of each multi-stage reflection section 51, 52 reach each total reflection surface 51a +
52m, the beam is refracted into a beam substantially parallel to the optical axis The light is focused and emitted from the front of the lens. Therefore, like the central portion 7 described above, this outer peripheral portion 8.9 also contributes to light emission without allowing any light to enter the light shielding member n.

Accordingly, 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 ατ is the forward light, which is transmitted through the direct light system of the inner lens 3 disposed at the center portion 7 of the front lens 2. As the side light enters the prism section 31, as shown in the figure, the light flux within the range of angle α on the right side and the range of angle α on the left side is transmitted through the left and right optical lenses 41 and 4 disposed on both sides of the light source 60.
2 and the multi-stage reflection parts 51 and 52 having a total reflection function corresponding to the optical lenses 41 and 42, it is possible to make a large amount of light beam incident on the outer peripheral part 8.9 of the outer lens 2.

Therefore, the angle of the emitted light from the light source 6 is α? The luminous flux in the range +α; The effective amount of light is large, and despite the presence of the light shield n, a large amount of light with a higher luminous flux density can be emitted, and the lens surface brightness is uniform, ensuring good visibility.

According to the configuration described in detail above, external light such as sunlight enters when the lights are off, and even if it does, that light (almost never re-emits to the outside). Moreover, when the light source is turned on, the entire amount of light from the light source can contribute to light emission even though a light shield is provided on the front lens, and by effectively using the luminous flux from the light source, the lens The surface brightness can be made uniform, so visibility is good, and at the same time, the difference from when the lights are off is noticeable, so there is no misidentification.
Therefore, effects such as being able to properly achieve the display function as a signal light are produced.

Note that the present invention is not limited to the above-mentioned embodiment (for example, depending on the shape of the lens, the optical system including the optical lens 4 and the multi-stage reflection section 5 may be arranged around the side of the light source 6).

As is clear from the embodiments described above, the vehicle lamp of the present invention is a lamp in which a light source is disposed within a lamp chamber defined by a housing and a lens disposed on the front surface of the housing, and the light source of the front lens is provided with a light source. An inner lens with a direct prism part that refracts the forward light from the light source approximately parallel to the optical axis is installed inside the central part, and an optical lens is placed on the side of the light source corresponding to the outer periphery of the inner lens. A multi-stage reflecting section is disposed to reflect and focus the light from the optical lens toward the outer peripheral portion into a beam substantially parallel to the optical axis, and condensing prism elements are arranged and formed on the inner surface of the front lens. , and on its surface, a transmitting part is provided at each light condensing part produced by each of the prefectural light prism elements, and a light blocking body is provided in the part outside the transmitting part, so that when the light is turned on, The angle α, ten α of the front light and side light emitted from the light source! It is possible to effectively utilize the luminous flux in the range of In addition, when the light is turned off, even during the daytime, the light shield prevents external light such as sunlight from entering the lamp chamber, and the reflective surface prevents the incident light from re-emitting from the lens surface. As a result, the difference in lamp brightness between when the lamp is turned off and when it is turned on increases, and there is no possibility that the lamp is mistakenly judged as being turned on when the lamp is turned off, thereby achieving the effect that good visibility with high safety can be achieved.

[Brief explanation of the drawing]

FIG. 1 shows a cross-sectional view of a conventional lamp. 2 to 4 show an embodiment of the vehicle lamp of the present invention, FIG. 2 is a front view, FIG. 3 is a sectional view taken along line A-A in FIG. 2, and FIG. It is a sectional view taken along the line B-B. 1...Housing, 2...Front lens, 2]...
Condensing prism element, n...light shielding body, Z...transmissive part,
3... Inner lens, 31... Direct beam prism section, 4 (41, 42)... Optical lens, 5 (51, 5
2)...Multi-stage reflection section, 6...Light source, 7...Lens central part, 8.9...Lens outer periphery, 10...Light chamber,
X...optical axis. Patent applicant: Ichikoh Industries, Ltd.

Claims (1)

[Claims] A lamp in which a light source is arranged in a lamp chamber defined by a housing and a lens disposed in front of the housing, and the front light from the light source is arranged as an optical axis inside the central part of the front lens facing the light source. An inner lens formed with a direct prism portion that refracts substantially in parallel is disposed, and an optical lens is disposed on the side of the light source corresponding to the outer periphery of the inner lens, and the light from the optical lens is directed to the outer periphery. A multi-stage reflecting section is provided to reflect and focus light rays substantially parallel to the optical axis, and condensing prism elements are arranged in an array shape 5t-1 on the inner surface of the outer lens, and each light beam generated by the prefectural light prism elements is disposed on the surface of the outer lens. A vehicular lamp characterized in that a light transmitting part is provided in a light condensing part, and a light blocking body is provided in a part outside the transmitting part.