JPH0917208A - Lens of headlamp for vehicle - Google Patents

Abstract

PURPOSE: To improve the attractiveness of a headlamp in the state of being turned off by forming an irregular part for diffusing light to the inner surface side of the lower side part in a side part extending backward from the periphery of a lens front part. CONSTITUTION: Irregular parts 13, 13 are formed in the respective inner surfaces of an upper side part 11 and a lower side part 12 in the side part 10 of a lens 3, and many diffusion steps 14, 14, 14... are formed so as to extend over in the front and the rear directions. When one looks into a lower side part 12 through the front part 9 of the lens 3 of a headlamp 1 for an automobile in the state that an electric lamp 5 is turned off, incident light from the exterior of the lens 3 is diffused in left and right directions by the curved surface-form left and right side surfaces 15, 15, 15... of the respective diffusion steps 14 of the irregular parts 13, and further, the shape of the projected images of a bumper 17, structural members and the like on the lower side is distorted by the respective curved surface-form side surfaces 15 of many diffusion steps 14, so that the bumper 17, the structual members and the like go out of sight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a new vehicle headlight lens. More specifically, it is an object of the present invention to provide a new lens for a vehicle headlamp that has a simple structure and does not increase the manufacturing cost, and that can improve the appearance of the vehicle headlight when it is not lit. To do.

[0002]

BACKGROUND OF THE INVENTION In vehicles, especially motor vehicles, the headlight is usually located above and close to the bumper. Therefore, if the lower side edge of the headlamp lens is transparent, when the headlamp is viewed obliquely downward from the front of the headlamp, the interior of the bumper or vehicle body can be seen through the front side and the lower side edge of the lens. Is not visible because it can be seen. This was particularly remarkable when the hood was opened.

Further, if dust or dust adheres to the gap between the lens and the bumper, it is difficult to remove them, which further deteriorates the appearance.

Further, if the lower side portion of the lens is transparent, the light from the light bulb is totally reflected upward at the side portion of the light bulb when the light bulb is turned on, and a dazzling light is generated.

Therefore, in a conventional vehicle headlight lens, a non-reflective coating film is formed on the lower side of the lens or a non-reflective tape in order to improve the appearance and prevent the dazzling light. Was attached to form a non-reflective portion.

As another example, a ridge is formed on the outer surface of the lower side of the lens of the headlight or knurling is applied to diffuse the external light to prevent the interior of the bumper or the vehicle body from being diffused. Some have been made invisible to improve their appearance.

[0007]

However, in the lens of the conventional vehicle headlamp as described above, in order to form the non-reflective portion, the coating as described above is performed after the original lens manufacturing process. It requires a separate process such as coating and applying tape, which complicates the process and raises the manufacturing cost, and the coating film and tape peel off due to aging, which causes a problem that it looks bad. Was there.

Further, in the case where the outer surface of the lower side portion of the lens of the headlight is formed with ridges or knurled,
These ridges and knurling process can be performed at the same time as the lens molding process, so the above problems do not occur, but those with knurling have a low degree of diffusion and bumper and car body The inside looks like a striped pattern, and if mud adheres to the ridges or knurled parts, the effect will almost disappear and the appearance will deteriorate further. Was there.

[0009]

Therefore, in order to solve the above-mentioned problems, a lens of a vehicle headlamp according to the present invention has a front portion of a lens and a side portion extending substantially rearward from a peripheral edge of the front portion. Is integrally formed, and a concavo-convex portion for diffusing light is formed on at least the inner surface side of the lower side portion of the side portion.

[0010]

Therefore, in the lens of the vehicle headlamp of the present invention, the unevenness that diffuses the light to at least the inner side of the lower side of the side extending substantially rearward from the peripheral edge of the front surface of the lens. Since the portion is formed, when the headlamp is viewed obliquely downward from the front of the headlamp, the interior of the bumper and the vehicle body cannot be seen through the front surface and the lower side portion of the lens, and thus the appearance is improved.

Further, since the uneven portion is formed on the inner surface side of the lens, mud or the like does not adhere and the effect does not deteriorate. In addition, even if mud or the like adheres to the outer surface side of the portion where the uneven portion is formed, it will not be visible and the appearance will not be further deteriorated.

Further, since the light from the light bulb is diffused by the uneven portion, no dazzling light is generated.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the lens of the vehicle headlamp of the present invention will be described below with reference to the embodiments shown in the accompanying drawings.

1 to 3 show an embodiment in which the lens of the vehicle headlamp of the present invention is applied to a vehicle headlamp 1 having a substantially rectangular shape.

An automotive headlamp 1 has a substantially parallelogrammic container-shaped lamp body 2 whose front surface is open obliquely upward and which is horizontally long and whose left side surface and right side surface are inclined when viewed from the front. A lens 3 attached to the lamp body 2 to cover the front surface thereof, a reflecting mirror 4 supported so as to be tiltable with respect to the lamp body 2, a light bulb 5 arranged at a predetermined position of the reflecting mirror 4, and the like. Become.

A light bulb insertion hole 6 is formed at a substantially central portion of the back surface of the lamp body 2, and a lens mounting groove 7 is formed at an opening edge of the lamp body 2 so as to be opened forward.
Are formed.

The inner surface of the reflecting mirror 4 except the upper surface and the lower surface thereof is a paraboloid of revolution, and is also a reflecting surface formed by vapor deposition of aluminum or the like.

Further, a light bulb mounting hole 8 is formed in the rear surface of the reflecting mirror 4 substantially in the center thereof.

Then, the light bulb 5 is inserted through the light bulb insertion hole 6 of the lamp body 2 and is attached to the light bulb attachment hole 8 of the reflecting mirror 4, and the filament (not shown) is a substantially focal point of the paraboloid of revolution of the reflection surface. It is located in.

The lens 3 is made of transparent glass or synthetic resin, and is provided with a front face portion 9 positioned so as to cover the front face opening of the lamp body 2, and a side portion 10 protruding rearward from the peripheral edge of the front face portion 9. Are integrally formed, and the front surface portion 9 is inclined so as to be displaced forward as it goes downward.

The upper side portion 11 is formed so that the front half portion extends rearward from the peripheral edge of the front face portion 9 substantially horizontally, and subsequently the rear half portion is displaced upward as it goes rearward.
The lower side portion 12 is generally formed so as to be displaced downward as it goes rearward, but the amount of downward displacement is large at a substantially intermediate position, that is, the lower side portion 12 is located. The inclination angle of the latter half of the is increased.

Also, of the side portions 10, the upper side portion 11
And the concave and convex portions 13, 1 on the inner surface of each of the lower side portions 12.
3 are formed. A large number of diffusion steps 14, 14, ... Are formed on each of the uneven portions 13 so as to extend in the front-rear direction.

As shown in FIG. 3, each of the diffusion steps 14 is formed in a ridge shape having a substantially bell-shaped cross section. That is, each diffusion step 1
The cross-sectional shape of 4 is a shape obtained by deforming the left and right sides of a triangle so as to form a gentle convex arc shape.
Reference numerals 5 and 15 are convex arcuate surfaces having a substantially arc shape and gently curved. In this way, the left and right side surfaces 15, 15 are
Is formed as a convex curved surface, and acts as a convex lens on the light passing through it.

Further, a fitting piece 16 is integrally provided at the rear end of the side portion 10 so as to project rearward, and the lens 3 is provided with the fitting piece 1.
6 is fitted to the lens mounting groove 7 of the lamp body 2, and is attached to the lamp body 2 so as to cover the front surface thereof.

Then, the automobile headlamp 1 as described above.
Is attached to a predetermined position of the vehicle body of the automobile, and the lower side portion 12 of the lens 3 comes close to the upper wall 18 of the bumper 17 of the automobile as shown in FIG.

Therefore, when the lower side portion 12 is seen through the front surface portion 9 of the lens 3 of the vehicle headlight 1 when the light bulb 5 is not lit, the diffusion step 14 of the uneven portion 13
Left and right side surfaces 15, 15, ...
The light injected from the outside of the lens 3 is diffused in the left-right direction by the .. Further, the projected images of the bumper 17 and the structural material of the vehicle body, etc. located below the diffused light are projected in a large number of diffusion steps 14, 1.
The shape is distorted by the curved side surfaces 15, 15, and the bumper 17, the structural material of the vehicle body, and the like are not clearly visible, so that they are not unsightly.

When the light bulb 5 is turned on, the light bulb 5
Even when a part of the light emitted from the light enters the upper side part 11 and the lower side part 12 of the side part 10 of the lens 3, the upper side part 11 and the lower side part of the light are included. The light reflected by 12 is the slope 1 of the diffusion steps 14, 14, ...
Since it is not diffused by 5, 15, ... And becomes a strong light in the same direction, it does not become a dazzling light to an oncoming vehicle.

FIG. 4 shows a modified example 20 of the uneven portion shown in the above embodiment.

.. are formed of a large number of protrusions extending in the front-rear direction, and each of the diffusion steps 21 includes the diffusion steps 14, 14, ... In the above embodiment. In the same manner as in, the left and right side surfaces 22, 22 in the cross-sectional shape are convex ridges that are curved and projected in a substantially arcuate shape from the state shown by the broken line to form a convex curved surface. However, the side faces 22 and 22 have a higher degree of curvature than the side faces 15 and 15 of the protrusion 14 shown in the above-mentioned embodiment.

Therefore, the diffusion step 2 of the uneven portion 20
In 1, the light reflected by the surfaces of the side surfaces 22 and 22 has an extremely strong degree of being diffused in the left-right direction as compared with the case of the side surfaces 15 and 15 of the diffusion step 14, and the light injected from the outside of the lens 3 is It is strongly diffused to the left and right,
The projected images of the bumper 17 and the structural material of the vehicle body therebelow are strongly distorted by the curved side surfaces 21, 21 so that the bumper 17 and the structural material of the vehicle body are not clearly visible and do not become unsightly.

5 to 8 show another modified example 30 of the uneven portion shown in the above embodiment.

The concavo-convex portion 30 is divided into a grid shape and has a quadrangular shape in a plan view. The diffusion steps 31, 31, ...
Are formed in large numbers in the vertical and horizontal directions. Then, each diffusion step 31 is formed by providing the mold with a substantially quadrangular pyramid. Therefore, in each diffusion step 31, triangular slopes 32, 32, ... Continuing from the quadrangular outer edge are formed, and as shown in FIGS. 6 and 7, the most recessed vertex 33 is arranged near the center. There is.

Therefore, in this modification, four triangular slopes 32, 32, ... Of each diffusion step 31 are provided.
・ Each is an isosceles right triangle.

The four slopes 3 of each diffusion step 31
The shapes of 2, 32, ... Are not necessarily the isosceles right triangles or the same shape.

That is, as shown in FIG. 8, for example, the diffusion step 31a includes triangular slopes 32a, 32b, 32.
The shapes of c and 32d are different from each other.
a hypotenuse 34 which is a boundary line between a, 32b, 32c and 32d,
The hypotenuses 35, 35 are formed to be longer than the 34. Therefore, in the diffusion step 31a, the most recessed vertex 36 is displaced from the center of the diffusion step 31a to the right side.

However, in each diffusion step 31 of the uneven portion 30, unlike the case of the diffusion steps 14 and 21, the slopes 32, 32, ... Light coming in from outside the slope 3
Are diffused in all directions by 2, 32, ..., and the projected images of the bumper 17 and the structural material of the vehicle body, etc. below the slopes 32, 32 of the diffusion steps 31, 31 ,.
Since it is reflected downward by, the bumper 17 and the structural material of the vehicle body are hardly visible.

9 to 11 show a further modified example 40 of the uneven portion.

The concavo-convex portion 40 is divided into a grid shape and has a quadrangular shape in the plan view. The diffusion steps 41, 41 ,.
Are formed in large numbers in the vertical and horizontal directions.

The diffusion steps 41, 41, ...
Have substantially the same shape as the diffusion steps 31, 31, ... Described in the modified example 30 of the concavo-convex portion, particularly in the planar shape.

However, the diffusion step 3 which is a plane
Unlike the slopes 32, 32, ... of 1, 31, ..., As shown in FIG. 9 and FIG.
The inclined surfaces 42, 42, ... Of 41, ... Are concave curved surfaces that are gently curved. 43 is a diffusion step 4
It is the apex which is the most recessed portion located at the center of 1, 41, ....

Therefore, in the uneven portion 40, the slopes 42, 42, ... Of the diffusion steps 41, 41 ,. , And the projected images of the bumper 17 and the structural material of the vehicle body below it are distorted by the slopes 42, 42, ... Having a substantially concave lens shape. Etc. can hardly be seen.

In the above modification, the diffusion step 3
.., which are recessed in a substantially quadrangular pyramid shape, are shown. However, for example, diffusion steps protruding in a quadrangular pyramid shape may be used. The diffusion steps 31, 31, ...
The symbol * indicates that each occupies a substantially quadrangular region, but the region is not limited to a quadrangle, and for example, a polygon such as a hexagon or an octagon can be considered.

Further, in the diffusion steps 14, 21 and 31 shown in the above-mentioned embodiments and modified examples, the height (depth in the diffusion step 31) of the diffusion steps is the formation of the diffusion steps 14, 21, 31. The pitch p may be set within the range of 0.5 to 1.2 times. This is because the above value is 0.
When it is 5 or less, the uneven portion becomes flat and the bumper, the structural material of the vehicle body and the like can be seen. On the contrary, when the forming pitch p is 1.2 or more, so-called sink marks are formed at the time of molding the lens. Is generated.

[0044]

As is apparent from the above description, the lens of the vehicle headlamp of the present invention is a lens for covering the front opening of the lamp body of the vehicle headlamp, and the lens is a front portion. And a side portion extending substantially rearward from the peripheral edge of the front surface portion are integrally formed, and an uneven portion for diffusing light is formed on at least the inner surface side of the lower side portion of the side portion. To do.

Therefore, in the lens of the vehicle headlamp of the present invention, the unevenness that diffuses the light to at least the inner surface of the lower side of the side extending substantially rearward from the peripheral edge of the front surface of the lens. Since the head portion is formed, when the headlamp is viewed obliquely downward from the front of the headlamp, the interior of the bumper and the vehicle body cannot be seen through the front surface and the lower side edge portion of the lens, which improves the appearance.

Further, since the uneven portion is formed on the inner surface side of the lens, mud or the like does not adhere and its effect is not deteriorated. In addition, even if mud or the like adheres to the outer surface side of the portion where the uneven portion is formed, it will not be visible and the appearance will not be further deteriorated.

Further, since the light from the light bulb is diffused by the uneven portion, no dazzling light is generated.

It should be noted that the concrete shapes and structures of the respective portions shown in the above-mentioned embodiment and its modified examples are merely examples of the implementation in carrying out the present invention, and accordingly, the present invention can be realized. The technical scope should not be limitedly interpreted.

[Brief description of the drawings]

FIG. 1 shows an example in which the lens of the vehicle headlight of the present invention is applied to the lens of the vehicle headlight according to FIGS. 2 and 3, and this figure is a front view.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an enlarged perspective view of a main part.

FIG. 4 is an enlarged cross-sectional view showing a modified example of the uneven portion.

FIG. 5 shows another modified example of the concavo-convex portion together with FIGS. 6 to 8, and this figure is an enlarged plan view.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 5;

FIG. 8 is an enlarged plan view of a diffusion step.

FIG. 9 shows another modification of the concavo-convex portion together with FIGS. 10 and 11, and this figure is an enlarged plan view.

10 is a cross-sectional view taken along line XX of FIG.

FIG. 11 is a sectional view taken along the line XI-XI in FIG. 9;

[Explanation of symbols]

 1 Automotive headlight (vehicle headlight) 2 Lamp body 3 Lens 9 Front part 10 Side part 12 Lower side part 13 Uneven part 14 Diffusion step (projection) 20 Uneven part 21 Diffusion step (projection) ) 30 uneven portion 31 diffusion step (recessed portion) 31a diffusion step (recessed portion) 40 uneven portion 41 diffusion step (recessed portion) 42 slope p forming pitch

Claims (6)

[Claims] 1. A lens for covering a front opening of a lamp body of a vehicle headlamp, wherein the lens is integrally formed with a front surface portion and a side portion extending substantially rearward from a peripheral edge of the front surface portion. A lens for a vehicle headlamp, wherein an uneven portion for diffusing light is formed on at least an inner surface side of a lower side portion of the side portion. 2. The lens for a vehicle headlamp according to claim 1, wherein the uneven portion for diffusing light is composed of a large number of protrusions having a substantially bell-shaped cross section. 3. An uneven portion for diffusing light is composed of a large number of ridges each having a cross-sectional shape and two left and right sides of a triangle formed in a substantially arc shape and protruding left and right. Item 2. A vehicle headlight lens according to item 1. 4. The lens for a vehicle headlamp according to claim 1, wherein the uneven portion for diffusing light is composed of a large number of concave portions that are recessed in a substantially pyramidal shape. 5. The lens for a vehicle headlamp according to claim 4, wherein the slopes of the plurality of substantially pyramidal recesses are each formed to have a concave curved surface. 6. The relationship between the formation pitch of the ridges / or recesses and the height / or depth is such that the height / or depth is within the range of 0.5 to 1.2 times the value of the formation pitch. The lens of the vehicle headlamp according to claim 1, claim 2, claim 3, claim 4, or claim 5, characterized in that.