JP2796920B2 - Vehicle headlights - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular headlamp having a light distribution control mechanism in which a reflection surface is composed of a plurality of reflection regions, wherein the headlamp is formed between reflection regions of the reflection surface. It is an object of the present invention to provide a new vehicle headlamp in which dazzling light is prevented from being generated by the stepped portion.

[0002]

2. Description of the Related Art Some automotive headlamps and motorcycle headlamps use a plain lens without a lens step in the front lens thereof due to design requirements.

In order to obtain a desired light distribution, such a vehicle headlight is a so-called multi-reflector in which a reflecting surface of a reflector is composed of a plurality of reflecting areas and the reflecting surface has a light distribution control mechanism. Is used.

FIGS. 13 and 14 show a conventional vehicle headlamp a using such a multi-reflector.

[0005] A vehicle headlamp a includes a lamp body b having an open front surface, a front lens c disposed so as to cover the front opening of the lamp body b, and the above-described lamp disposed inside the lamp body b. A reflector d, a valve e disposed at a predetermined position inside the reflector d, and a valve e
And a shade f arranged so as to cover the front of the vehicle.

The reflector d divides a paraboloid-shaped base surface from a plurality of vertical lines and a plurality of substantially horizontal lines when viewed from the front, and a number of small reflection areas (hereinafter, referred to as "segments"). g, g,... are formed, and each segment g,
.. are designed to take charge of a predetermined portion in a desired light distribution pattern.

[0007] Steps h, h,..., Which face upward or downward, are formed at the boundary between the segments g and corresponding to the above-mentioned substantially horizontal line.

For the bulb e, for example, an H4 type bulb is used. The reflector d is arranged such that the traveling beam filament i is located at a substantially focal position of the reflector d, and the passing beam filament j is located in front of it.
The lower half of the passing beam filament j is covered with a light shielding cap k.

The shade f is composed of a cup-shaped shade body l having an open rear and supporting pieces m, m projecting rearward from the rear opening edge of the shade main body l. The shade body 1 is supported by the valve insertion hole of the reflector d together with the valve e so as to cover the front of the valve e.

[0010] The front lens c is formed without a lens step and is formed so as to cover the front of the reflector d in a state where the mounting ridge formed on the outer peripheral edge is fitted into the installation groove of the lamp body b. Is attached to the lamp body b.

Thus, the light emitted from the traveling beam filament i is reflected on substantially the entire surface of the reflector d.
The light reflected by each segment g, g,... Is responsible for a predetermined portion of the traveling light distribution pattern, and the pattern of each of the segments g, g,. A light pattern is formed.

Further, of the light emitted from the passing beam filament j, the downward light is shielded by the light shielding cap k located below it, and only the light upward from the upper edge of the light shielding cap k is reflected by the reflector d. The light is reflected by substantially the upper half of the reflection surface.

Then, the passing beam filament j
Is located ahead of the focal point of the reflector d, the light reflected by the upper half of the reflector d is slightly downward light,
A light distribution pattern for passing is formed.

The reflection on the reflecting surface of the reflector d is performed by each segment g, g,.
The light reflected by g,... is responsible for a predetermined portion of the passing light distribution pattern, and the patterns of these segments g, g,. A light pattern is formed.

[0015]

However, in such a conventional vehicle headlamp a provided with a reflector d,
When the passing beam filament j is turned on, irregular reflection occurs at step portions h, h,... Formed so as to extend in a substantially horizontal direction at a boundary portion between the segments g and g, so-called glare. There is a problem that light is generated.

That is, the light hitting the steps h, h,... Becomes unexpectedly reflected light, and when this reflected light is emitted forward, it becomes slightly upward light. Yes, this was dazzling light.

The reflector d generally has a reflective surface formed by aluminum deposition or the like after the formation of the undercoat layer. However, since the undercoat layer is formed by applying a paint, the step portions h, h ,..., The thickness of the undercoat layer tends to be non-uniform, and therefore, the above-mentioned irregular reflection is more likely to occur on the reflection surface formed at such stepped portions h, h,. Had become.

[0018]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a vehicle headlamp according to the present invention has a rear surface of a cup-shaped shade provided so as to cover the front side and the front side of a light source. A shade piece protrudes from the opening edge, and the shade piece is positioned between a portion that is a step formed between the reflection region and the reflection region of the reflection surface and is likely to cause dazzling light, and the light source. It is formed in.

[0019]

Therefore, according to the vehicle headlamp of the present invention, by providing the shade piece at the above-described position, the glare light is generated at the step portions formed between the respective reflection areas in the reflector. It is possible to reduce or eliminate the dazzling light, which is conventionally generated when the light from the light source does not hit the stepped portion and the light from the light source hits the step.

[0020]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a reflector for a vehicle headlamp according to the present invention.

Reference numeral 1 denotes a vehicle headlamp, a lamp body 2 having an open front, a front lens 3 disposed so as to cover the front opening of the lamp body 2, and a reflector 4 disposed in the lamp body 2. And a valve 5 disposed at a predetermined position inside the reflector 4 and a shade 6 disposed so as to cover the front of the valve 5.

The reflector 4 is supported so as to be tiltable with respect to the lamp body 2, and its angle is changed by an aiming mechanism and a leveling mechanism (not shown) so that the irradiation direction can be adjusted arbitrarily.

The reflector 4 has a slightly oblong elliptical shape in a frontal shape, and has a concave surface opened forward.
The concave surface portion is a reflection surface 7, and the reflection surface 7 divides a paraboloid-shaped base surface into a plurality of vertical lines, a plurality of horizontal lines, and one inclined line when viewed from the front. Forming a number of segments 7a, 7a,.
The focal points of a, 7a,... are formed so as to substantially coincide with the focal points of the base surface.
Is designed to take charge of a predetermined portion of a desired light distribution pattern.

Numeral 8 denotes a valve mounting hole formed in the center of the reflector 4, and the valve 5 is mounted so that its two filaments 9, 10 are arranged at predetermined positions in the reflector 2.

At the boundary between the segments 7a and 7a, corresponding to the horizontal and inclined lines, there are formed steps 11, 11,... Which face upward or downward. .

The stepped portions 11, 11,...
First step portion 1 formed at a position slightly lower than the upper end portion of
1a, a second step 11b formed at a position slightly lower than the first step 11a, and a third step formed to extend leftward from an obliquely upper left portion of the valve mounting hole 8. A portion 11c, a fourth stepped portion 11d formed to extend leftward from a diagonally lower left portion of the valve mounting hole 8, and a fourth stepped portion formed to extend rightward from a diagonally upper right portion of the valve mounting hole 8. Fifth step portion 11e and valve mounting hole 8
A sixth step portion 11f formed to extend rightward from the right end of the valve mounting portion, and a seventh step portion formed to extend from the lower right portion of the valve mounting hole 8 approximately 20 degrees to the lower right.
11g, an eighth step 11h formed at a position slightly below the valve mounting hole 8, and an eighth step 1
Ninth step 11 formed at a position slightly lower than 1h
There is i.

Reference numeral 4a denotes a bent portion formed so as to protrude forward at a lower portion of the peripheral portion of the reflector 4, and the reflection surface 7 is formed continuously on the inner surface of the bent portion 4a. I have.

For example, an H4 type bulb is used as the bulb 5, and a traveling beam filament 9 is provided at a substantially focal position (focal position on the base surface) of the reflector 4, and a passing beam filament 10 is provided in front of the traveling beam filament 9. It is attached to the reflector 4 so as to be positioned, and the lower half of the passing beam filament 10 is covered with a light shielding cap 12.

The light-shielding cap 12 has an upper left edge 12 thereof.
a is on a horizontal line including the optical axis (the rotation axis of the base surface),
Further, the right upper edge 12b is formed so as to be obliquely obliquely downward and approximately 15 degrees from the optical axis when viewed from the front, and the left upper edge 12a and the right upper edge 12b are light distributions for passing beams. A so-called cut line on the pattern is formed.

Since the light-shielding cap 12 is formed in the above-described shape, a line x extending horizontally to the left from the center of the bulb mounting hole 8 and a substantially obliquely lower right angle of about 15 degrees in the low beam. It is sufficient to use the portion of the reflection surface 7 above the line y extending in the direction of the angle (the portion in the range of "A" shown in FIG. 2), and therefore, the x-ray and y
What is necessary is just to form a step part in each line.

However, the bulb is a light-shielding cap 12 covering the lower beam filament 10 and its lower half.
It is necessary to make the reflecting surface 7 used for the low-pass beam wider than the above-mentioned range "A", and the above-mentioned second and third lines located below the x-ray and the y-ray, respectively. Fourth step 11d and seventh step 11
g is formed, and a portion 7d of the reflecting surface 7 below the step portions 11d and 11g is a reflecting surface exclusively for the traveling beam, so that the light of the passing beam filament 10 hits the reflecting surface 7d exclusively for the traveling beam. Not to be.

The shade 6 comprises a cup-shaped shade main body 13 with an open rear, and support pieces 14, 14 and the like protruding rearward from the rear opening edge of the shade main body 13, and the tips of the support pieces 14, 14 are provided. The shade 6 is attached to the reflector 4 so that the shade main body 13 covers the front of the bulb 5 by being supported by the bulb mounting hole 8 of the reflector 4 together with the bulb 5.

The lower part 13a of the rear opening edge of the shade main body 13 is positioned slightly behind the line connecting the rear end of the traveling beam filament 9 and the bent part 4a of the reflector 4 so as to be located slightly behind. Thereby, when the traveling beam filament 9 is turned on, a shadow line (cut-off line) of the lower portion 13a of the shade main body 13 is formed on the reflecting surface 7 slightly behind the bent portion 4a of the reflector 4. .

Reference numerals 15, 15, 15 denote shade pieces projecting rearward from the rear opening edge of the shade main body 13, and the respective shade pieces 15, 15, 15 are provided with the step portions 11, 11,.
.. Are formed corresponding to predetermined ones.

That is, one shade piece (hereinafter, referred to as "first shade piece") 15a is provided between the third step portion 11c and the passing beam filament 10 by another shade piece (hereinafter, "first shade piece"). The second shade piece 15) is provided between the fifth step portion 11e and the passing beam filament 10 and another shade piece (hereinafter referred to as a "third shade piece").
Shade pieces. " ) 15c is the sixth step 1
1f and the passing beam filament 10, respectively, and the first shade piece 15a is slightly obliquely slightly above and slightly inward from the position slightly above the left end of the rear opening edge of the shade main body 13. , The second shade piece 15b is slightly obliquely upward and slightly inward from the position slightly above the right end of the rear opening edge of the shade body 13, and the third shade piece 15c is shaded. From the right end of the rear opening edge of the main body 13 toward the rear,
Each is formed.

Although the shade pieces 15, 15, 15 are formed separately from the support pieces 14, 14, the present invention is not limited to this. One of the support pieces 14 may be formed so as to also serve as the shade piece 15.

The front lens 3 is transparent without a lens step, and a peripheral wall 3b is integrally formed rearward from the outer peripheral edge of the lens portion 3a, and is further formed on the rear end edge of the peripheral wall 3b. A mounting ridge 16 is formed, and the front lens 3 is attached to the lamp body 2 so as to cover the front of the reflector 4 in a state where the mounting ridge 16 is fitted in the lens installation groove 17 of the lamp body 2. You.

The inner surface of the peripheral wall 3b of the front lens 3 is painted black.

Thus, the light emitted from the traveling beam filament 9 is reflected on substantially the entire surface of the reflector 4, and
The light reflected by each segment 7a, 7a,... Is responsible for a predetermined portion of the traveling light distribution pattern through the front lens 3, and the pattern of each of the segments 7a, 7a,. Is formed.

Further, of the light emitted from the traveling beam filament 9, the light directed to the lower part of the front opening of the reflector 4 is blocked by the lower part 13 a of the rear opening of the shade main body 13 as described above. The light L (see FIG. 1) that hits the reflecting surface 7 slightly behind the bent portion 4a of the fourth light 4 is emitted forward, but the light does not hit the bent portion 4a, and irregular reflection occurs at the portion 4a. Will not occur.

The downward light among the light emitted from the passing beam filament 10 is shielded by the light-shielding cap 12 located thereunder, and is directed upward from a horizontal line passing through the center of the valve mounting hole 8 and obliquely downward to the right. About 15
The light above the line extending in the direction of the degree angle is the reflector 4
Are reflected by the substantially upper half 7u of the reflecting surface 7 of the first embodiment.

Then, the passing beam filament 1
Since 0 is located ahead of the focal point of the reflector 4, the light reflected by the reflecting surface 7u in the upper half is slightly downward.
A light distribution pattern for passing is formed.

Most of the light emitted directly forward from the traveling beam filament 9 and the passing beam filament 10 is shielded by the shade 6, whereby
Dazzling light due to direct light is blocked.

The reflection on the reflecting surface 7 of the reflector 4 is performed by each of the segments 7a, 7a,..., And the light reflected by each of the segments 7a, 7a,. Are combined, and a pattern of these segments 7a, 7a,... Is synthesized to form a predetermined passing light distribution pattern.

Also, the passing beam filament 10
Are emitted from the shade pieces 15a, 15b, 15
c, the shade of the first shade piece 15a becomes the third shade.
The shading of the second shade piece 15b is formed on the fifth step portion 11e, and the shading of the third shade piece 15c is formed on the sixth step portion 11f, respectively. The portion 11c, the fifth step portion 11e, and the sixth step portion 11f are not irradiated with the light from the passing beam filament 10, so that these step portions 11c, 11e,
No dazzling light due to 11f is generated.

The steps 11, 1 formed on the reflecting surface 7
Of the 1,..., The light is prevented from hitting only the third step portion 11c, the fifth step portion 11e, and the sixth step portion 11f because the glare light is a low-beam light distribution pattern. Since the light irradiates slightly above the so-called cut line above, diffused reflection at the steps 11, 11,... Near the portion of the reflection surface 7 forming the cut line becomes the most dazzling light. Because it is easy.

Also, a number of segments 7a, 7a,.
The reflective surface 7 formed with a step has a step in the vertical direction as well as in the horizontal direction. Even if irregular reflection occurs in the step extending in the vertical direction, the irregular reflection is irregular reflection in the left and right directions, and the It does not produce any upward light.

Reference numeral 18 denotes an extension member provided between the reflector 4 and the front lens 3. A reflection surface formed by aluminum evaporation is formed on the inner side surface of the extension member 18, and a front opening edge of the reflector 4 is provided. This is to prevent the gap between the lamp body 2 and the front opening edge of the lamp body 2 from being seen from the front.

Reference numeral 19 denotes a waterproof rubber cover for closing a bulb insertion hole formed in the center of the rear surface of the lamp body 2 from behind.

FIG. 12 shows a modified example 4A of the reflector.

This reflector 4A is different from the reflector 4 in the above-described embodiment in that the front shape is circular, the segments are formed symmetrically, and the formation positions of the steps formed on the reflection surface are different. It is.

In particular, the reflector 4A shown in this modified example has the shade pieces 15a, 15b, 15c in the above embodiment.
Step portions 11c, 11e,
Of 11f, the one corresponding to the sixth step portion 11f is not formed.

When the shade 6 in the above embodiment is used for such a reflector 4A, a shadow 20 due to the third shade piece 15c of the shade 6 is formed on the reflection surface 7 where no step is formed. However, such a shadow 20 is formed only in a small part of the effective reflection portion of the reflection surface 7 and does not have a great influence on the light distribution pattern.

Therefore, the shade 6 can be applied not only to the reflector 4 shown in the above embodiment, but also to the reflector 4A shown in this modification.

[0055]

As is apparent from the above description, according to the present invention, a reflector having a reflection surface divided into a plurality of reflection areas, a front lens disposed so as to cover the front of the reflector, and a reflection lens are provided. A light source positioned slightly in front of the substantially focal position of the surface; and a cup-shaped shade covering the front and front sides of the light source. The shade is supported by a reflector by a support piece and a rear opening of the shade. A shade piece protruding from an edge, the shade piece being a substantially horizontal step formed between the reflection areas of the reflection surface and extending in the substantially horizontal direction, and a part where dazzling light is likely to occur and the light source; And is formed between them.

Therefore, according to the vehicle headlamp of the present invention, by providing the shade piece at the above-described position, the glare light is generated at the step formed between the reflection areas in the reflector and between the reflection areas. It is possible to reduce or eliminate the dazzling light, which is conventionally generated when the light from the light source does not hit the stepped portion and the light from the light source hits the step.

In the above-described embodiment, the vehicle headlight according to the present invention is applied to a vehicle headlight in which a reflector is provided in a lamp body. However, the present invention is not limited to this, and the lamp body and the reflector may be integrated. Vehicle headlamp.

In the above embodiment, the front lens is a completely transparent lens. However, the present invention is not limited to this. Most of the desired light distribution pattern depends on the multi-reflector, but contributes to a part of the light distribution pattern. A front lens formed with a lens step can be used.

In addition, the reflector shown in the above embodiment,
The structures, shapes, numbers, etc. of the segments, steps, and other parts are only examples of the embodiments of the present invention, and the technical scope of the present invention should not be interpreted in a limited manner. No.

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view of a vehicle headlamp according to the present invention.

FIG. 2 is a front view of a reflector and a shade used in the present invention.

FIG. 3 is a sectional view taken along a line III-III in FIG. 2 with a shade removed;
It is an end elevation along a line.

FIG. 4 is an end view taken along the line IV-IV in FIG. 2;

FIG. 5 is an end view along the line VV in FIG. 2;

FIG. 6 is an enlarged front view showing a shade used in the present invention.

FIG. 7 is an enlarged plan view showing a shade used in the present invention.

FIG. 8 is an enlarged left side view showing a shade used in the present invention.

FIG. 9 is an enlarged perspective view showing a shade used in the present invention.

FIG. 10 is an enlarged perspective view showing a main part viewed obliquely from the lower left in order to explain a state in which a shade formed by a shade piece used in the present invention is formed on a step portion.

FIG. 11 is an enlarged perspective view showing a main part viewed obliquely from the upper right side for explaining a state in which a shade due to a shade piece used in the present invention is formed on a step portion.

FIG. 12 is a front view showing a modified example of a reflector used in the present invention and a shade.

FIG. 13 is a central longitudinal sectional view showing a vehicle headlamp using a conventional multi-reflector.

FIG. 14 is a front view of a conventional multi-reflector and shade.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle headlight 3 Front lens 4 Reflector 6 Shade 7 Reflection surface 7a Reflection area 10 Light source 11 Stepped portion 11c Stepped portion where dazzling light is easily generated 11e Stepped portion where dazzling light is easily generated 11f Stepped portion where dazzling light is easily generated 14 Support Piece 15 shade piece 4A reflector

Continuation of the front page (56) References JP-A-50-54176 (JP, A) JP-A-4-79101 (JP, A) JP-A-3-86503 (JP, U) JP-A-60-156601 (JP) , U) JP-A-3-97816 (JP, U) JP-A-4-31203 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F21M 3/08 F21M 3/14

Claims (1)

(57) [Claims] 1. A reflector having a reflecting surface divided into a plurality of reflecting areas, a front lens disposed so as to cover the front of the reflector, a light source positioned slightly forward of a substantially focal position of the reflecting surface, and a light source of the light source. A cup-shaped shade covering the front and front sides, the shade being supported by a reflector by a support piece, and having a shade piece protruding from a rear opening edge of the shade; A vehicle characterized by being formed between a reflection area of a surface and a step portion extending in a substantially horizontal direction, which is formed in a substantially horizontal direction, and is located between a portion where dazzling light is likely to occur and the light source. Headlights.