JPS581906A - 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 lamp for a vehicle, and more particularly to a lamp for a mourning vehicle, which equalizes the brightness of the lens surface and improves visibility.

This type of wheel light is designed to reduce the depth of the light to make it thinner, so direct light from the light source is controlled directly (61) by a front lens, without using a rotating paraboloid shape that takes up space. As a ninth step, a direct-illuminating Fresnel prism is formed, and a good front box lens has been proposed.

A light fixture for a nine-vehicle vehicle that uses this direct-light Fresnel prism and is equipped with a good front lens is conventionally used in IIIWA, as shown in the figure, in which a light source C is disposed in a lamp chamber defined by a housing a and front lenses b and k. The front lens b includes an actor lens having a fisheye prism e formed on its inner surface, and a lens that controls the emitted light (direct light) from the light source C into a light beam approximately parallel to the original axis X. A refractive prism h is placed in the center facing the lens 11c, and a reflective prism h is placed around it, and a direct-ray Fresnel prism is placed around the round part. The part of the light that is incident on the inner lens i is incident within the range of angle [a' as shown in the figure, and is made approximately parallel to the optical axis X by the direct-input system 7 Lennel prism, and is parallel to the optical axis X of the actor lens d. It is constructed so that the desired light distribution and turn can be obtained by focusing on the fisheye prism.

However, in such conventional wheel lamps, the lens surface is formed into a flat shape and is disposed in the housing. In the central part - the radiation 5t (direct light) that is incident on the refraction prism provided here and the reflection prism h provided on the periphery is incident only within the range of angle ta' as shown in the figure. Since Zuko's incident angle aOHiro's inner lens f is planar, it is 180
There's no point in waking up. Therefore, since the range of iU angle α0 incident on the inner lens f is, the light -C
As a result, the lens surface is completely dark (visible, especially 'yt, which is incident on the reflective prism h far from the light source C), If the value is very small compared to the value of 〇, the amount of energy is small,
In addition, since the luminous flux density decreases, the central part where the refractive prism gt is provided looks bright from the outside, but the peripheral part φ where the reflective prism h is provided is a dark part, and such a dark part is especially horizontally long. This is noticeable in lamps with a lens surface of .

The presence of such dark areas reduces the brightness of the lens surface, making it impossible to obtain a uniform light-emitting surface and making the lighting filling look unsightly.In addition, the display light distribution function of signal lights etc. cannot be coupled sufficiently, resulting in poor visibility. There are disadvantages such as a decrease in

The present invention was made in view of the above-mentioned spring sentiment, and aims to provide a vehicle light with good visibility by effectively utilizing the luminous flux from the pulp and uniformizing the brightness over the entire surface of the lens. purpose.

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

Examples shown in Figs. 2 to *4E are examples in which this invention is applied to a tail light for an automobile, in which 1 is a housing, which is defined by a lens 2 disposed on the front surface of the housing 1, and is located inside a light chamber. Pulp 4 is arranged. The front lens 2 is provided with an actor lens 21 having a quadrant prism portion 211 on its inner surface, and an inner lens 22 formed inside thereof.The inner lens 22 has an optical axis X facing the pulp 5 on its outer surface. (The light emitted from the light source (filament) P of the pulp 5 forward and the light radiated backward are reflected by the reflecting mirror 3 disposed behind the pulp 5) at the central part 7 near the reference axis of the lamp. A refraction system prism section 22m is formed to control the nine large amounts of incident light into light beams substantially parallel to the optical axis X and output them in the direction of the actor lens 21. In addition, the inner lens 2
The peripheral side part 8 around the central part 7 of 2 (the part far from the light source P)
A refracting prism portion 22b is formed on the outer surface of the optical lens 22 to control a large amount of incident light from an optical lens 4, which will be described later, into light substantially parallel to the optical axis X.

More specifically, the reflector 6 is formed on the pack cover 6 so that the rear number ζ element axis X of the pulp 5 coincides with that of the light source P.
Since the reflective surface is formed to form an apparent light source in the vicinity of the light source P, a large amount of light flux is directed to the central portion 7 of the inner lens 22.
．． It can be input to. Moreover, the inner lens 2
When the optical lens 4 which emits a large amount of incident light to the circumferential side 8 of the fiber 5 is disposed substantially parallel to the optical axis A 7-ray cut 41 is formed on the inner surface of the light source P with the horizontal axis Y as the center, and the light emitted from the light source P to the side is converted into a ray approximately parallel to the horizontal axis Y. First, the outer surface of the optical lens 4 emits a large amount of incident light by directing the rays substantially parallel to the horizontal axis Y toward the circumferential side 8 of the inner lens 22. A Fresnel cut 42 is formed as shown in FIG.

The 7-lens cut 41, 42 formed on the inner and outer surfaces of the optical lens 4 can be concentric, lattice-shaped, cylindrical, etc. due to the Fresnel prism shape of the refractive prism 22b provided on the peripheral side 8 of the inner lens 22. It can be set arbitrarily.

In addition, when a Frehol prism is applied to the inner surface of the inner lens 22, a reflective prism portion is formed particularly on the peripheral side portion 8. Kokotosha, said optical lens 4
This is determined by the angle of the incident light from the 7-lens cut 42, which is formed on the outer surface.

Since the structure is as described above, the optical action of the pulp 5 when lit is shown in Figure N3 and Figure 1m4. 5 It enters the flat surface of the inner surface of the central part 7 near the optical axis X facing the cloud, passes through the wall thickness, enters the refractive system prism part 22m on the outer surface, is refracted with an element IIk substantially parallel to the original axis - It is emitted in the direction of the lens 21. Further, the light emitted backward from the light source P enters the reflecting mirror 5 and is focused near the light source P, as shown by the dotted line in the figure, and a large amount of light is emitted onto the flat surface of the inner surface of the central portion 7. The light beam is incident, passes through the wall thickness, enters the refraction system prism section 22 on the outer surface, is refracted into a light beam substantially parallel to the original axis X, and is emitted in the direction 15 of the outer lens 21.

Also, the light emitted from the lens P in the Confucian direction is located at the inner surface of the optical lens 4 (7), as shown by the dotted line in the figure.
1, the light is almost parallel to the horizontal axis Y, and is controlled to enter the outer surface of the 7-resnel cut 42.

JP-A-53-1906 (3) A large amount of light beam with a high gI& is emitted toward the peripheral side 8 far from the light source of the lens 22, and is incident on the flat surface of the inner surface, where it passes through the thickness of the broken wall and illuminates the outer surface. The refractive prism section 22b controls the beam to be substantially parallel to the optical axis
The light is focused by the quadrant grism 21m, diffused, and emitted in front of the lens to form a desired light distribution pattern.

Therefore, in the vehicle lamp of the present invention, as shown in Fig. #I4, the light emitted from the light source P is incident on the central part 7 near the original axis The amount of light incident within the range of angle rl aot shown by the solid line in the figure is the same as in the conventional case. The source radiated backward from the Jlt source P is incident on a reflecting mirror provided at the rear of the pulp 5, and the reflected light is reflected at an angle lLα0. The luminous flux in the range is once focused in the vicinity of the light source P, and a large amount of light having a high luminous flux density is made incident on the center s7, similar to the radiation from the light source. Furthermore, the light radiated laterally from the light source P is a luminous flux in the range of angle α0 shown by the dotted line in the figure, which is produced by the Fresnel cut 4 formed on the inner surface of the optical lens 4 disposed on the side of the pulp 5.
1, it is possible to control the rays i substantially parallel to the horizontal axis Y and allow a large amount of light beam with a high density to enter the circumferential side part 8 through the seven-lens cut 42 provided on the outer surface.

Therefore, the emitted light from the light source P is at an angle α0. +α0. +a
The luminous flux within the range of 1 can be effectively utilized.

Further, in this example, a Fresnel prism portion 22 is provided on the outer surface.

22b, it is possible to reduce the loss of light due to the flat surface of the inner surface.

Therefore, by allowing a large amount of light flux with high luminous flux density to enter the circumferential side part 8 of the lens 2, a dark part may be generated in the circumferential part 8. The present invention has the following effects: it is possible to emit light with a high intensity, it is possible to achieve uniform zero illumination over the entire surface of the lens, and it is possible to obtain a vehicle lamp with good visibility due to the lighting lighting.

In this example, one optical lens 4 is installed to allow a large amount of light to enter the s* portion 8 of the inner lens 22.
Although the above description has been made regarding the structure shown in FIG. Further, the optical lens 4 is attached to the housing 1.
Alternatively, it may be disposed on the grasshopper cover 6 by appropriate means. Furthermore, the inner lens type 12
For lamps with a heavy lens structure, the inner lens 2
A lattice-like Fresnel is formed on the inner or outer surface of the inner lens 22, and a 7-renel cylindrical portion is formed on the outer surface of the inner lens 22, and a fisheye prism portion is formed on the outer surface of the inner lens 22. However, it is also possible to construct the Maku Lens 2 with a single lens.

As is clear from the above-described embodiments, the vehicle lamp of the present invention is a nine-lamp device in which a light source is disposed within the nine lamps defined by a housing and a lens disposed on the front surface of the housing, and the lens A Fresnel grism part is formed in the central part near the original axis facing the light source and the peripheral side part around it, and a reflecting mirror is arranged to make a large amount of light flux from the source radiated backward from the light source enter the central part of the lens. The invention is characterized in that an optical lens is disposed in which a large amount of light beam is incident on the circumferential side of the lens from the point where the light source radiates sideways.The present invention solves the conventional problems. By effectively utilizing the luminous flux of the pulp, it is possible to compensate for a large amount of light with a high #C flux density on the peripheral side of the lens, and even at the center of the lens, the light with a high tolerance of light quantity can be generated. Therefore, the luminance of the entire surface of the lens can be made uniform, and a vehicle lamp with good visibility can be obtained.

[Brief explanation of drawings]

Fig. 1 shows an explanatory diagram of a conventional lamp, Figs. 2 to 4 show an embodiment of the vehicle lamp of the present invention, 2wJ is a front view of the lamp, and Fig. 5 is a sectional view of the main part. FIG. 4 is an explanatory diagram showing the optical effect. DESCRIPTION OF SYMBOLS 1... Housing, 2... Lens, 21... Actor lens, 22... Inner lens, 22m,
22b...Five parts of Fresnel priz, 3...Reflector, 4
...Optical lens, 5...Pulp, P...Light source, 8
...Surrounding side part, 10...Light chamber,

Claims (1)

[Claims] (Depending on the housing and the lens placed in front of it)
This is a lamp in which a nine-light Tominai #C light source is arranged, and a Fresnel prism part is formed in the central part near the optical axis facing the Lenssha light source and the peripheral side part around it, and the rear part from the light source is An optical lens is provided with a reflecting mirror that allows a large amount of light to be incident on the center of the lens, and also allows a large amount of light that is emitted from the light source to be incident on the peripheral side of the lens. A wheel lamp characterized by being provided with.