JP3180179B2 - Headlight lenses for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel vehicle headlight lens. More specifically, it is an object of the present invention to provide a novel vehicle headlight lens that has a simple structure, does not increase the manufacturing cost, and has a good appearance when the vehicle headlight is not lit. Is what you do.

[0002]

BACKGROUND OF THE INVENTION In vehicles, especially automobiles, headlamps are usually located above and close to the bumper. Therefore, when the lower side of the lens of the headlight is transparent, when the headlight is viewed obliquely downward from the front of the lens, the inside of the bumper or the vehicle body passes through the front and lower sides of the lens. Is visible and does not look good. This was particularly noticeable when the hood was opened.

[0003] Further, if dirt, dust and the like adhere to the gap between the lens and the bumper, it is difficult to remove them and the appearance is further deteriorated.

Further, if the lower side of the lens is transparent, light from the light bulb is totally reflected upward at the side of the bulb when the bulb is turned on, causing illusion light.

[0005] Therefore, in a conventional vehicle headlamp lens, a non-reflective coating film is formed on the lower side of the lens or a non-reflective tape is formed in order to improve the appearance and prevent the dazzling light. To form a non-reflective portion.

As another example, a projection is formed on the outer surface of the lower side of the lens of the headlight or knurling is performed, whereby external light is diffused, and the inside of the bumper or the vehicle body is formed. Others try to improve their appearance by making them invisible.

[0007]

However, in the above-described conventional headlamp lens for a vehicle, the above-described coating is performed after the original lens manufacturing process in order to form a non-reflective portion. This requires a separate process of stripping and applying tape, which complicates the process and raises the manufacturing cost, and also causes the problem that the coating film and the tape are peeled off due to aging, which makes the appearance worse. I was

Further, in the case of forming a ridge or knurling on the outer surface of the lower side of the lens of the headlight,
Since the process of forming these ridges and knurls can be performed at the same time as the lens forming process, the above-mentioned problem does not occur. The inside looks striped, and if mud or the like adheres to the ridged or knurled portion, the effect is almost lost and the appearance is further deteriorated. I was

[0009]

In order to solve the above-mentioned problems, a lens for a vehicle headlamp according to the present invention has a front portion and a side portion extending substantially rearward from the periphery of the front portion. There are integrally formed, to form an uneven portion for diffusing light on the inner surface of at least the lower side portion of the said side sides, uneven
Numerous ridges or cross-sections with a generally bell-shaped cross-section
The left and right sides of the triangle are formed in a substantially arc shape in the shape
Consists of a number of ridges with a protruding shape, or
The concavo-convex portion is composed of a large number of concave portions concaved in a substantially pyramid shape.
The slopes of the portions are formed so as to form concave curved surfaces .

[0010]

Therefore, in the lens of the vehicle headlamp according to the present invention , light is diffused at least to the inner surface of the lower side portion of the side portions extending substantially rearward from the periphery of the front portion of the lens .
The shape of the projected image, such as bumpers and vehicle body structural materials,
When the headlight is viewed obliquely downward from the front thereof, the bumper and the inside of the vehicle body cannot be seen through the front and lower sides of the lens, so that the appearance is improved.

[0011] Further, since the irregularities are formed on the inner surface side of the lens, mud or the like does not adhere to the lens, and its effect is not reduced. In addition, even if mud or the like adheres to the outer surface side of the portion where the uneven portion is formed, the appearance does not deteriorate and the appearance is further deteriorated.

Further, since the light from the light bulb is diffused by the concave and convex portions, there is no dazzling light.

[0013]

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

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

The vehicle headlamp 1 has a substantially parallelogram-shaped container-shaped lamp body 2 having a front surface opening obliquely upward and obliquely inclined from the left and right sides when viewed from the front. A lens 3 attached to the lamp body 2 and covering the front surface thereof; a reflecting mirror 4 supported to be tiltable with respect to the lamp body 2; a light bulb 5 disposed at a predetermined position of the reflecting mirror 4; Become.

A lamp insertion hole 6 is formed substantially at the center of the rear surface of the lamp body 2, and a lens installation groove 7 is formed at an opening edge of the lamp body 2 so as to open forward.
Are formed.

The inner surface of the reflecting mirror 4 has a paraboloid of revolution except for the upper and lower surfaces thereof and a reflecting surface formed by aluminum evaporation or the like.

A bulb mounting hole 8 is formed substantially at the center of the back surface of the reflecting mirror 4.

Thus, the bulb 5 is inserted through the bulb insertion hole 6 of the lamp body 2 and is attached to the bulb mounting hole 8 of the reflector 4, and a filament (not shown) substantially focuses on the paraboloid of revolution among the reflection surfaces. It is located at.

The lens 3 is made of a transparent glass or a synthetic resin, and has a front part 9 positioned so as to cover the front opening of the lamp body 2 and a side part 10 protruding rearward from the periphery of the front part 9. Are integrally formed, and the front portion 9 is inclined so as to be displaced forward as going downward.

The upper side portion 11 is formed so that the front half extends substantially horizontally rearward from the periphery of the front surface portion 9, and then the rear half moves upward as it goes rearward.
The lower side portion 12 is formed to be inclined so as to be displaced downward toward the rear as a whole, but the amount of downward displacement at a substantially intermediate position is large. The latter half is designed to have a large inclination angle.

The upper side portion 11 of the side portions 10 is also provided.
And uneven portions 13, 1 on the inner surface of the lower side portion 12 respectively.
3 are formed. A large number of diffusion steps 14, 14, ... are formed on each of the concave and convex 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
4 is a shape obtained by deforming the left and right sides of the triangle so as to form a gentle convex arc shape.
Reference numerals 5 and 15 are convex curved surfaces which are formed in a substantially arc shape and are gently curved. Thus, the left and right side surfaces 15, 15
When formed on a convex curved surface, acts as a convex lens on light passing through it.

Further, at the rear end of the side portion 10, a fitting piece 16 is integrally provided to protrude rearward.
6 is attached to the lamp body 2 so as to cover the front surface thereof while being fitted into the lens installation groove 7 of the lamp body 2.

The vehicle headlamp 1 as described above
Is attached to a predetermined position of the vehicle body of the automobile, and as shown in FIG. 2, the lower side portion 12 of the lens 3 comes close to the upper wall 18 of the bumper 17 of the automobile.

When the lower side 12 is viewed through the front surface 9 of the lens 3 of the vehicle headlamp 1 when the light bulb 5 is not lit, the diffusion step 14 of the uneven portion 13 is performed.
14, right and left side surfaces 15, 15,...
The light inserted from the outside of the lens 3 is diffused in the left-right direction by... Further, the projected images of the bumper 17 and the structural material of the vehicle body, etc. under the lens 3 are subjected to a large number of diffusion steps
The shape is distorted by the curved side surfaces 15, 15 of 4,..., And the bumpers 17 and the structural materials of the vehicle body are not clearly seen, and are not unsightly.

When the light bulb 5 is turned on, the light bulb 5
Even if a part of the light emitted from the lens enters the upper side 11 and the lower side 12 of the side 10 of the lens 3, the upper side 11 and the lower side of the light The light reflected at 12 is the slope 1 of the diffusion steps 14, 14,.
Since the light is not diffused by 5, 15,... To become strong light in the same direction, there is no dazzling light to oncoming vehicles.

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

The uneven portion 20 is formed with diffusion steps 21, 21,... Composed of a number of ridges extending in the front-rear direction, and each diffusion step 21 corresponds to the diffusion steps 14, 14,. Similarly to (1), in the cross-sectional shape, the left and right side surfaces 22, 22 are projected from the state shown by the broken line into a substantially circular arc shape so as to form a convex curved surface. However, the side surfaces 22, 22 have a higher degree of curvature than the side surfaces 15, 15 of the ridge 14 shown in the above embodiment.

Therefore, the diffusion step 2 of the uneven portion 20 is performed.
In 1, the light reflected on the surfaces of the side surfaces 22, 22 is diffused in the left-right direction more significantly than in the case of the side surfaces 15, 15 of the diffusion step 14. It is strongly diffused in the left and right direction,
The projected images of the bumper 17 and the structural material of the vehicle body thereunder are strongly distorted by the curved side surfaces 21 and 21, so that the bumper 17 and the structural material of the vehicle body are not clearly seen and are not unsightly.

FIGS. 5 to 8 show concave portions up to the above embodiment.
26 shows a configuration example 30 of a convex portion .

The uneven portion 30 is divided into squares, and is a diffusion step 31, 31,.
Are formed vertically and horizontally. Each diffusion step 31 is formed by providing a mold with a substantially quadrangular pyramid. Therefore, in each diffusion step 31, triangular slopes 32, 32,... Are formed that continue from the quadrangular outer edge, and as shown in FIGS. 6 and 7, the most depressed vertex 33 is arranged near the center. I have.

Therefore, in this configuration example , four slopes 32, 32,.
Each is a right-angled isosceles triangle.

The four slopes 3 of each diffusion step 31
The shape of 2, 32,... Does not necessarily have to be a right-angled isosceles triangle or each has the same shape.

That is, as shown in FIG. 8, for example, the diffusion step 31a is performed in a triangular slope 32a, 32b, 32.
The shapes of c and 32d are different from each other.
an oblique side 34, which is a boundary line between a, 32b, 32c, and 32d;
The oblique sides 35 and 35 are formed to be longer than the oblique sides 35 and 35. Therefore, in the diffusion step 31a, the most depressed vertex 36 is displaced slightly to the right from the center of the diffusion step 31a.

However, unlike the diffusion steps 14 and 21, the slopes 32, 32,... Light from outside the slope 3
Are also diffused in all directions by 2, 32,..., And the projected images of the bumper 17 and the structural material of the vehicle body thereunder are also inclined surfaces 32, 32,.
The bumper 17 and the structural material of the vehicle body are hardly visible because the light is reflected downward by the above. Only
In addition, each diffusion step 31 of the uneven portion 30 has a curved surface shape.
Because there are no side surfaces that have been
It is not possible to distort the shape of the projected image. So the book
The desired invention will appear.

9 to 11 show another modification 40 of the uneven portion.
It shows.

The uneven portion 40 is divided into squares, and the diffusion steps 41, 41,.
Are formed vertically and horizontally.

The diffusion steps 41, 41,...
Have the same basic shape as the diffusion steps 31, 31,... Described in the configuration example 30 of the concavo-convex portion, particularly, almost the same shape in a planar shape.

However, the flat diffusion step 3
Unlike the slopes 32, 32,... Of 1, 31,..., As shown in FIG.
The inclined surfaces 42, 42,... Of 41,. 43 is the diffusion step 4
Are the vertices which are the most depressed portions located at the centers of 1, 41,...

Therefore, in the concave / convex portion 40, the light entering from the outside of the lens 3 can be directed in various directions because the slopes 42, 42,... Of the diffusion steps 41, 41,. The projected image of the bumper 17 and the structural material of the vehicle body and the like under the bumper 17 are distorted by the substantially concave lens-shaped slopes 42, 42,. Are almost invisible.

In the above configuration example , the diffusion step 3
.. Are shown to be substantially quadrangular pyramid-shaped, but for example, a diffusion step protruding in a quadrangular pyramid shape may be used. In addition, the diffusion steps 31, 31,...
Indicates that each occupies a substantially square area, but the area is not limited to a square, and may be, for example, a polygon such as a hexagon or an octagon.

Further, each of the diffusion steps 14, 21 and 31 shown in the above embodiment and each modification or configuration example is
The height of the diffusion step (depth in the diffusion step 31) is the formation pitch p of each of the diffusion steps 14, 21, and 31.
In the range of 0.5 to 1.2 times. this is,
If the above value is 0.5 or less, the bumps and the structural material of the vehicle body will be visible, and conversely, if the formation pitch p is 1.2 or more, the lens This is because so-called sink marks occur during the molding of.

[0044]

As is apparent from the above description, the lens of the vehicle headlamp according to the present invention is a lens for covering the front opening of the lamp body of the vehicle headlamp. and the side portions extending substantially rearward from the peripheral edge of the front surface portion is formed integrally to form an uneven portion for diffusing light on the inner surface of at least the lower side portion of the said side sides, uneven portions
Numerous ridges or cross-sections whose cross-sections are approximately bell-shaped
The left and right sides of the triangle are formed in a substantially circular arc shape,
Consisting of a number of ridges having a raised shape or
The concave and convex portions are composed of a large number of concave portions that are recessed in a substantially pyramid shape,
Are formed so as to form a concave curved surface .

Therefore, in the lens of the vehicle headlamp according to the present invention , light is diffused at least on the inner side of the lower side portion of the side portions extending substantially rearward from the periphery of the front portion of the lens.
And the shape of the projected image of bumpers and vehicle structural materials
When the headlight is viewed obliquely downward from the front, the bumper and the inside of the vehicle body are not seen through the front and lower sides of the lens, so that the appearance is improved.

Further, since the uneven portion is formed on the inner surface side of the lens, no mud or the like adheres to the lens, and its effect is not reduced. In addition, even if mud or the like adheres to the outer surface side of the portion where the uneven portion is formed, the appearance does not deteriorate and the appearance is further deteriorated.

Further, since the light from the light bulb is diffused by the concave and convex portions, there is no dazzling light.

It should be noted that the specific shapes and structures of the respective parts shown in the above-described embodiment and its modifications are only examples of the embodiment of the present invention, and the present invention is not limited thereto. The technical scope should not be construed as limiting.

[Brief description of the drawings]

FIG. 1 shows an embodiment in which a lens of a vehicle headlight according to the present invention is applied to a lens of a vehicle headlight together with FIGS. 2 and 3, and FIG. 1 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 an example of the configuration of the concave and convex portions together with FIGS. 6 to 8, and FIG. 5 is an enlarged plan view.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

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 modified example of the uneven portion together with FIGS. 10 and 11, and FIG. 9 is an enlarged plan view.

FIG. 10 is a sectional view taken along the line XX of FIG. 9;

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Headlamp for vehicles (Headlight for vehicles) 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) ) 40 Uneven portion 41 Diffusion step (recess) 42 Slope p Formation pitch

Continuation of front page (56) References JP-A-7-262803 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) F21S 8/10 F21V 5/00

Claims (4)

(57) [Claims] 1. A lens for covering a front opening of a lamp body of a vehicle headlamp, the lens having a front part and a side part extending substantially rearward from a peripheral edge of the front part, and being formed integrally. An uneven portion for diffusing light is formed at least on the inner surface side of the lower side portion of the side portions, and the uneven portion has a cross-sectional shape and is substantially a bell.
A lens for a vehicle headlight, comprising a plurality of ridges forming a shape . 2. A front opening of a lamp body of a vehicle headlamp.
A lens covering the front part and the front part.
A side portion extending substantially rearward from the peripheral edge is integrally formed, and
Light is diffused at least to the inner surface of the lower side of the side
Forming an uneven portion to be formed, the uneven portion having a triangular cross-sectional shape.
The left and right sides are formed in a substantially circular arc shape and protruded left and right
For vehicles, comprising a number of ridges having a shape
Headlight lens. 3. A front opening of a lamp body of a vehicle headlamp.
A lens covering the front part and the front part.
A side portion extending substantially rearward from the peripheral edge is integrally formed, and
Light is diffused at least to the inner surface of the lower side of the side
The concave and convex portions are formed in a substantially pyramid shape.
Number of recesses, and the slopes of the recesses each form a concave curved surface.
A headlamp for a vehicle, characterized in that
Lens. 4. The pitch and height or depth of the ridges or recesses.
In relation to the height, the height or the depth is the value of the value of the formation pitch.
It is noted that the range is 0.5 to 1.2 times.
The vehicle according to claim 1, 2 or 3, wherein
Headlight lens.