JPS581902A - 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 that equalizes the brightness of a lens surface and improves visibility.

This type of vehicle lighting equipment uses a rotating paraboloid shape that takes up space to reduce the thickness of the lighting equipment by forming it shallowly. A front lens in which a system 7 Lennel prism is formed has been proposed.

A nine-vehicle light fixture equipped with a front lens formed with a direct-light Fresnel prism has a lamp chamber (with a light source C installed) defined by a nozzle a and a front lens b, as shown in the conventional J1111. The front lens b forms a fisheye prism on its inner surface, and is controlled as a light beam that is approximately parallel to the outer lens 4 and the optical axis X of the light emitted from the light source e (direct light). It consists of a refractive prism 1 in the center 11 facing the sun, a reflective prism h on its outer periphery, and an inner lens f equipped with a so-called direct-ray 7-Renel prism. ), the light incident on the inner lens f is incident within the range of angle a0 as shown in the figure, and is converted into a beam 11 substantially parallel to the optical axis X by the direct-input main Fresnel prism, and condensed by the outer lens, which is a fisheye prism. to obtain a desired light distribution pattern.

However, in such conventional wheel lamps, the lens surface is formed in a planar shape and is disposed on the nose housing a. The emitted light (II emitted light) that is incident on the refractive prism g provided at the center facing the light source C of the Relenal prism and the reflective prism h provided on the outer circumference around it is at an angle fa0 as shown in the figure. The incident angle ta' cannot exceed 180° because the inner lens f is planar. Therefore, since the light incident on the inner lens f is within the range of angle α0, the utilization rate of the luminous flux from the light source C is low, so that the entire lens surface appears dark, and the light enters the reflecting prism h, which is far from the light source. The light is at an angle β1. β2 is in the range, and the value is very small compared to the value of the angle a0, so the amount of luminous flux is small, and the amount of luminous flux ft: decreases.Ninthly, the central part where the refractive prism g is installed looks bright from the outside, but The reflection system prism h has a dark area in the outer local area around the periphery, and this dark area appears particularly prominently in a lamp having a horizontally elongated lens surface.

JP-A-5'1-1902 (2) 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 ring look unsightly, as well as hindering the display light distribution function of signal lights, etc. There are drawbacks such as poor visibility and poor performance.

The present invention has been made in view of the above circumstances, and aims to effectively utilize the luminous flux from the bag to eliminate dark areas that occur in the outer peripheral portion of the lens far from the light source, and to uniformize the brightness f over the entire surface of the lens. The object of the present invention is to provide a wheel lamp with good visibility.

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

The illustrated examples of FIGS. 2 to 5 are examples of the present invention, in which l is a housing, and a bulb is placed in a lamp chamber 10 defined by a lens 2 disposed on the front surface of the housing l. It is supported and disposed on a holder 41 via four sockets 41. The front lens 2 is provided with an outer lens 21 having a fisheye prism 1121m formed on its inner surface, and an inner lens n arranged around the outer lens 21. A Fresnel prism portion is formed on the outer surface of the inner lens n, and a bulb 4 is formed in the center s6 near the optical axis X (reference axis of the lamp) facing the lens 4.
The light radiated forward from the light source (filament) P is incident on the outer lens 2 and is controlled to be approximately parallel to the optical axis
A refraction system prism section 22& is formed to emit light in one direction. Furthermore, the center s of the inner lens n
A large amount of incident light is controlled to be almost parallel to the optical axis X from the optical lens 3 (31, 32, 33, 34) described later on the outer surface of the outer peripheral part 7 (the part from the light source P) around the outer lens 60. The refraction system prism section 22 so as to emit light in 210 directions.
b2>! It is being formed.

The optical lens 3 is shown in FIG. 3 and WC4.

<Left and right optical lenses 31 are provided on the side of the bulb 40, approximately parallel to the optical axis X, and corresponding to the outer peripheral portion 7 of the inner lens n.
, 32 and upper and lower optical lenses 33134#l are arranged around the outer periphery of the knob 4 so as to be opposite to each other. That is, a left side optical lens 31 and a right side optical lens 31 are disposed at opposing positions on both sides of the optical lens 3ri bulb 4 shown in FIG. 3, and the optical lens 3 shown in FIG.
An upper optical lens and a lower optical lens are disposed in opposing positions on both sides of the bulb 40 within the housing l by appropriate fixing means. The optical lenses 3 have left and right optical lenses 31 and 32) and upper and lower optical lenses 31 and 32), respectively, and seven lens cuts 31' on their inner surfaces centered on the horizontal axis Y of the bulb 4, which is perpendicular to the optical axis X.
e 32m, 33m, 34m are formed and sP, Fresnel cuts of each chain 31m, 32m, 3
3a m 34m is set as a prism to control the refraction of the light radiated from the light 111P to the side so that it is almost parallel to the horizontal axis Y, and each outer surface has an inner 7 renel cut) 31m + 32a m 33a m 34m
The travel time parallel rays are refracted by the inner lens ρ
The refractive prism 22b K in the outer circumference 7 far from the light source P
Fresnel cuts 314, 32b, 3Bb, and 34b are formed, respectively, to allow a large amount of light beam to be incident thereon.

In addition, the left and right upper and lower optical lenses 31, 32, 33
, 34 (each 7 renel cutlets formed on the outer surface of the
b.

7 pages 32b, 33+, 34b 14 i;yt
-v N This includes, but is not limited to, grid-like 7
The Lens cut length may be set arbitrarily, and in this example, 7 Lens prism portions are formed on one outer surface of the inner lens n, but this is K11l.
For example, in the case where a 7-Renel prism section is formed on the inner surface, a reflective prism section is formed on Fi, especially on the outer peripheral section 7. This lens is a 7 formed on the outer surface of each of the optical lenses 31, 32, 33, and 34.
Lenerkat 31b, 32b, 33b.

It is determined by the angle of the incident light from 34b. Since the configuration is as described above, 1. As shown in FIG. 3vA and FIG. 4, the optical effect when the pulp 40 is turned on is that the light emitted forward among the light emitted from the light source P is reflected by the pulp 4Ktim of the inner lens n as shown by the solid line in the figure. 19
32 (3) The light enters the flat surface of the inner surface of the center s6 near the facing optical axis X, passes through the wall thickness, enters the refractive prism lI22m on the outer surface, is refracted into light 11 substantially parallel to the optical axis, and enters the outer lens 21. It is emitted towards the target. Furthermore, the light emitted laterally from the light source P is incident on the inner surfaces of the left optical lens 31 and the right optical lens 32, respectively, as shown by the dotted line in the figure. The outer periphery of the left and right sides of the inner lens n is controlled by the Fresnel cuts 31m, 32&, which are respectively refracted to substantially parallel light to the horizontal axis Y, and transmitted through the wall thickness and formed on the outer surface. A large amount of incident light with a high luminous flux density is made incident on the flat surface of the inner surface of the inner lens n, and is transmitted through the wall thickness, and is converted into a beam substantially parallel to the optical axis X by the refractive prism section 22b on the outer surface of each of the inner lenses. The light is refracted and emitted toward the outer lens 21. Then, the light is emitted to the side in the vertical direction and travels through the inward 7-lens cut 338 of the upper optical lens and the lower optical lens, respectively, as shown in Fig. 4.
m 34a From K, horizontal axis Y and approximately 9 pages parallel light! IKIA folding outward 7 renel cut 33b,
34b, the upper and lower outer peripheral parts 7 of the inner lens n
A large amount of incident light with high luminous flux density is made to enter the inward flat WJ portion of the inner lens n, and transmitted through the 11th thickness of the inner lens n to form a beam approximately parallel to the optical axis X at the refractive prism portion 22b on the outer surface. Outer lens 21 whose refraction is controlled to
The atFi outer lens 21 is a light beam that is substantially parallel to the optical axis X and is emitted toward the outer lens 4.
The light is condensed and diffused by the fisheye prism portion 21a, and is emitted in front of the lens to form a desired light distribution pattern.

Therefore, in the wheel lamp of the present invention, out of the light emitted from the light source P, as shown in No. 51, the light emitted forward that enters the central part near the optical axis X of the inner lens n is shown by the solid line in the figure. The amount of light incident within the range of angle α0□ is the same as in the conventional case. In the present invention, the light emitted from the light source P to the left and right sides is within the range of angle α02゛ on the left side and the angle α on the right side shown by the dotted line.
0. The respective luminous fluxes of the above range, the upper range of angle α% (not shown), and the lower range of angle a05 (not shown) are arranged on the left and right sides (upper and lower @) of the bulb 4. A 7-lens cut 31a @ 32m (33a
a34a), the emitted light is controlled to be a ray approximately parallel to the horizontal axis Y, and the outer surface of the seven-lens cut 31b, 32b (3
3b.

34b) and the left and right sides (upper and lower sides) of inner lens 4 from K
A large amount of light with a high luminous flux density can be incident on the outer periphery s7 of each.

Therefore, for the emitted light from the light source P, the forward emitted light has an effective luminous flux angle α01 range, and the sideward emitted light (all directions from left and right, up and down) has an effective luminous flux angle aoz+α1+αt+α1, and the luminous flux is effectively used. Therefore, an optical lens 3 having left and right optical lenses 31 and upper and lower optical lens parts and tools is arranged so as to surround the pulp 4 in the outer peripheral part 7 far from the lens 20 light @p. By making a large amount of light with high light density incident on the outer circumferential portion 7, the brightness of the outer circumferential portion 7 can be compensated for.

Moreover, in this example, the outward direction of the inner lens 4 is
l K7L/ne, □X A ill f. 7 ya. 8
surface.

Due to the planar portion, there is little loss of light, and the bulb luminous flux can be used effectively. Therefore, dark areas do not occur in the outer peripheral portion 7, and the brightness over the entire surface of the lens can be made uniform, so that it is possible to obtain a wheel lamp that satisfies visibility.

In addition, the inner lens type double lens structure lamp KT
For example, if a lattice-shaped Fresnel prism part is formed on the inner or outer surface of the inner lens n, the outer lens 21 may be a cover lens. The eye prism portion may be formed or removed, and the lens 2 may be composed of a single piece, and the lens 2 is not limited to the above-mentioned embodiments, but may be composed of various combinations.

As is clear from the above embodiments, 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 in front of the housing,
The front lens has a Japanese Patent Publication No. 58-1902 facing the light source.
(4) A 7-Lesnel prism part is formed in the center part and the outer peripheral part around it, and a large amount of light beam is made to enter the light emitted laterally from the front light distribution source toward the outer periphery 11 far from the light source of the front lens. Since the present invention is characterized in that the optical lens is disposed approximately parallel to the optical axis and surrounding the light source, the present invention can eliminate the conventional problems and also reduce the light flux of the bulb. If used effectively, dark areas will not appear on the outer periphery of the lens, and the brightness of the entire surface of the lens can be made uniform, and a vehicle lamp with good visibility can be obtained. be.

It should be noted that, as a matter of course, the present invention is not limited to the above-mentioned embodiments.

[Brief explanation of the drawing]

5. Fig. 1 shows a cross-sectional view for explaining the optical function of a conventional lamp, and Figs. 2 to 4 show an embodiment of the wheel lamp of the present invention. Figure A in Figure 2
- A cross-sectional view of the main part of the line, Figure 4 is B-Bl in Figure 2.
FIG. 5, which is a sectional view of the main part of i, is an explanatory diagram showing the photoadditive effect. 13ゎl...Housing, 2...Front lens, 221,
22b...7 Renel 1 rhythm section, 3...optical lens, 31...left optical lens, proverb...right optical lens, O...upper optical lens, U...lower Side optical lens, P...light source, 7...outer periphery, 10...lamp chamber, X...optical axis patent ratio applicant Ichikoh Industries, Ltd.

Claims (1)

[Claims] This is a lamp in which a light source is installed in a lamp chamber defined by a housing, a lens disposed on the front surface of the housing, and a light chamber defined by K. An optical lens that forms a rhythm section and directs a large amount of light emitted from the light source laterally toward the outer peripheral portion of the front lens that is far from the light source is surrounded approximately parallel to the optical axis and on the side of the light source. A vehicle light fixture characterized by nine features arranged in a circular pattern.