JPH06251603A - Headlamp for vehicle - Google Patents

Abstract

PURPOSE:To prevent dazzling light from being generated due to a step differenced part formed between reflecting regions of a reflecting surface, in a headlamp for a vehicle having light distribution control mechanism of constituting the reflecting surface of a plurality of the reflecting regiorns. CONSTITUTION:A headlamp for a vehicle is provided to comprise a reflector 4 of dividing a reflecting surface 7 into a plurality of segments 7a, 7a,..., front surface lens 3 arranged so as to cover the front of this reflector 7, low beam filament 10 positioned a little in the front from almost a focus position of the reflecting surface and a cup-shaped shade 6 for covering the front and the front part sideward of this low beam filament. This shade 6 is supported to the reflector by a supporting piece 14, to also protrusively provide shade pieces 15a, 15b, 15c from a rear surface opening edge of the shade, and these shade pieces are positioned between parts 11c, 11e, 11f, which are stepped parts 11, 11,... extended in a horizontal direction formed between the segments of the reflecting surface to easily generate dazzling light, and the low beam filament.

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 reflecting surface is composed of a plurality of reflecting areas, which is formed between the reflecting areas of the reflecting surface. It is intended to provide a new vehicle headlight in which dazzling light is not generated by the stepped portion.

[0002]

2. Description of the Related Art Some automotive headlights and two-wheeled vehicle headlights use a transparent lens that does not have a lens step formed on the front lens, because of design requirements.

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

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

The vehicle headlamp a has a lamp body b having an opening on the front surface, a front lens c arranged so as to cover the front opening of the lamp body b, and the above-described arrangement arranged inside the lamp body b. A reflector d, a valve e arranged at a predetermined position inside the reflector d, and a valve e
The shade f and the like are arranged so as to cover the front of the shade.

The reflector d divides a paraboloidal base surface into a plurality of vertical lines and a plurality of substantially horizontal lines when viewed from the front, and a large number of small reflection regions (hereinafter referred to as "segments"). are formed, and each segment g,
It is designed so that g, ... Are in charge of a predetermined portion in a desired light distribution pattern.

Further, step portions 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.

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

The shade f is composed of a cup-shaped shade main body 1 having an opening at the rear side and supporting pieces m, m projecting rearward from the opening edge of the rear surface of the shade main body 1, and the tip ends of the supporting pieces m, m. The shade main body 1 is disposed in a valve insertion hole of the reflector d together with the valve e so as to cover the front of the valve e.

The front lens c is transparent with no lens step formed, and covers the front of the reflector d with the mounting ridge formed on the outer peripheral edge fitted in the mounting groove of the lamp body b. Attached to the lamp body b.

Therefore, 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 of the segments g, g, ... Is in charge of a predetermined portion of the traveling light distribution pattern, and the patterns of these segments g, g, ... A light pattern is formed.

Further, of the light emitted from the low beam filament j, the downward light is blocked by the light shielding cap k located therebelow, and only the light upward from the upper edge of the light shielding cap k is reflected by the reflector d. It is reflected by approximately the upper half of the reflecting surface.

Then, the filament for passing beam j
Is positioned in front of the focal point of the reflector d, the light reflected by the upper half of the reflector d is a 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 in charge of 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 the vehicle headlamp a provided with such a conventional reflector d,
When the passing beam filament j is turned on, diffuse reflection occurs at the step portions h, h, ... Formed so as to extend in a substantially horizontal direction among the boundary portions between the segments g and g, so-called dazzling. There was a problem that light was generated.

That is, the light striking the stepped portions h, h, ... Becomes unplanned reflected light, and when this reflected light is emitted toward the front, it may become slightly upward light. Yes, this was a dazzling light.

Further, the reflector d generally has a reflecting surface formed by aluminum vapor deposition after forming an undercoat layer. However, since the undercoat layer is formed by applying a paint, the step portions h, h , ..., the layer thickness of the undercoat layer is likely to be non-uniform, and therefore the diffused reflection is more likely to occur on the reflecting surface formed in such step portions h, h ,. It was.

[0018]

Therefore, in order to solve the above-mentioned problems, the vehicle headlight of 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 the light source. A shade piece is provided so as to protrude from the opening edge, and the shade piece is positioned between the light source and the step portion formed between the reflection areas of the reflection surface, which is likely to generate dazzling light. It was formed in.

[0019]

Therefore, according to the vehicle headlamp of the present invention, by providing the shade piece at the above-mentioned position, the dazzling light is generated at the step portion formed between each reflection area in the reflector. The light of the light source does not illuminate the portion that is likely to generate, and the dazzling light that has hitherto been generated by the light of the light source illuminating the stepped portion can be reduced or eliminated.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A reflecting mirror of a vehicle headlight according to the present invention will be described below with reference to the illustrated embodiments.

Reference numeral 1 denotes an automobile headlamp, which includes a lamp body 2 having a front opening, a front lens 3 arranged to cover the front opening of the lamp body 2, and a reflector 4 arranged in the lamp body 2. A valve 5 arranged at a predetermined position inside the reflector 4, a shade 6 arranged so as to cover the front of the valve 5, and the like.

The reflector 4 is tiltably supported 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 is in the shape of a front and is in the shape of a horizontally long oval, and has a concave surface that is open toward the front.
The concave portion is used as a reflecting surface 7, and the reflecting surface 7 is formed by dividing a base surface having a paraboloid of revolution into a plurality of vertical lines, a plurality of horizontal lines and one inclined line when viewed from the front. A large number of segments 7a, 7a, ...
The focal points of a, 7a, ... Are formed so as to substantially coincide with the focal point of the base surface, and these 7a, 7a ,.
Is designed to be in charge of a predetermined portion in a desired light distribution pattern.

Reference numeral 8 denotes a valve mounting hole formed in the central portion of the reflector 4, and the valve 5 is mounted so that the two filaments 9 and 10 thereof are arranged at predetermined positions in the reflector 2.

At the boundary between the segments 7a and 7a, which corresponds to the horizontal line and the inclined line, step portions 11, 11 ... Which face upward or downward are formed. .

The reflecting surfaces 7 are formed on the step portions 11, 11 ,.
First step 1 formed at a position slightly lower than the upper end of the
1a, a second stepped portion 11b formed at a position slightly lower than the first stepped portion 11a, and a third stepped portion formed to extend leftward from an upper left portion of the valve mounting hole 8. The portion 11c, the fourth step portion 11d formed to extend leftward from the lower left portion of the valve mounting hole 8 and the fourth stepped portion 11d formed to extend rightward from the upper right portion of the valve mounting hole 8. The fifth step portion 11e and the valve mounting hole 8
A sixth step portion 11f formed to extend rightward from the right end of the valve and a seventh stepped portion extending obliquely downward to the right approximately 20 degrees from the oblique lower right portion of the valve mounting hole 8.
Step portion 11g, an eighth step portion 11h formed at a position slightly below the valve mounting hole 8, and the eighth step portion 1
The ninth step portion 11 formed at a position lower than 1 h
i have.

Reference numeral 4a denotes a bent portion formed in the lower part of the peripheral portion of the reflector 4 so as to project forward. The reflecting surface 7 is continuously formed on the inner surface of the bent portion 4a. There is.

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

The light-shielding cap 12 has a left upper edge 12 thereof.
a is on the 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 inclined obliquely downward to the right 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 the low beam. A so-called cut line on the pattern is formed.

Since the light-shielding cap 12 is formed in the above-described shape, in the low beam, originally, a line x extending horizontally to the left from the center of the valve mounting hole 8 and a diagonally lower right angle of about 15 degrees. It suffices to use the portion of the reflecting surface 7 above the line y extending in the direction of the angle (the portion within the range of "A" shown in FIG. 2).
A step may be formed on each line.

However, the bulb has a light-shielding cap 12 that covers the filament 10 for passing beams and substantially the lower half thereof.
Since there is a variation in the positional relationship between and, the reflecting surface 7 used for the passing beam needs to be wider than the range "A", and the above-mentioned first and second positions located below the x-ray and the y-line, respectively. Fourth step 11d and seventh step 11
g, and the portion 7d of the reflecting surface 7 below the stepped portions 11d and 11g is used as the traveling-beam dedicated reflecting surface, whereby the traveling-beam dedicated reflecting surface 7d is exposed to the light of the passing beam filament 10. There is no such thing.

The shade 6 is composed of a cup-shaped shade main body 13 having an opening at the rear and support pieces 14 and 14 projecting rearward from an opening edge of the rear surface of the shade main body 13. The shade 6 is attached to the reflector 4 so that the shade body 13 covers the front of the valve 5 by being supported together with the valve 5 in the valve mounting hole 8 of the reflector 4.

The lower portion 13a of the rear opening edge of the shade body 13 is located slightly behind the line connecting the rear end of the traveling beam filament 9 and the bent portion 4a of the reflector 4. By this, when the traveling beam filament 9 is turned on, a shadow line (cutoff line) of the lower portion 13a of the shade body 13 is formed on the reflecting surface 7 slightly behind the bent portion 4a of the reflector 4. .

Reference numerals 15, 15 and 15 denote shade pieces projecting rearward from the opening edge of the rear surface of the shade body 13, and the shade pieces 15, 15 and 15 are the step portions 11, 11 ,.
.. of the 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 and another shade piece (hereinafter referred to as "first shade piece"). The second shade piece 15b 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 piece ". ) 15c is the sixth step portion 1
If the first shade piece 15a is arranged between the 1f and the low beam filament 10, and the first shade piece 15a is located at a position slightly above the left end of the rear opening edge of the shade body 13 and at a position obliquely above and behind the shade. The second shade piece 15b is located at a position slightly above the right end of the rear opening edge of the shade main body 13 and is obliquely above and slightly toward the inside of the shade, and the third shade piece 15c is the shade. From the right end of the rear opening edge of the main body 13 toward the rear,
Each is formed.

The shade pieces 15, 15, 15 are formed separately from the support pieces 14, 14, but the invention is not limited to this, and one of the support pieces 14 may 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 further, a rear end edge of the peripheral wall 3b is formed. 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 with the mounting ridge 16 fitted in the lens mounting groove 17 of the lamp body 2. It

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

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

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 13a of the rear opening of the shade body 13 as described above, and therefore, the reflector. The light L (see FIG. 1) that hits the reflecting surface 7 slightly behind the bent portion 4a of No. 4 is emitted forward, but the light does not hit the bent portion 4a, so that diffuse reflection occurs at the portion 4a. It never happens.

Of the light emitted from the low beam filament 10, the downward light is shielded by the light shielding cap 12 located therebelow, and is directed upward from the horizontal line passing through the center of the bulb mounting hole 8 and diagonally to the lower right. About 15
The light above the line extending in the direction of the angle of degrees is reflected by the reflector 4
It is reflected by substantially the upper half 7u of the reflecting surface 7.

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

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

The reflection on the reflecting surface 7 of the reflector 4 is carried out by the respective segments 7a, 7a, ... And the light reflected by the respective segments 7a, 7a ,. , And the patterns of these segments 7a, 7a, ... Are combined to form a predetermined passing light distribution pattern.

The passing beam filament 10
The light emitted from the shade pieces 15a, 15b, 15
The shade of the first shade piece 15a is blocked by c
, The shade of the second shade piece 15b is formed on the fifth step portion 11e, and the shade of the third shade piece 15c is formed on the sixth step portion 11f. The portion 11c, the fifth step portion 11e, and the sixth step portion 11f are not exposed to the light from the low beam filament 10, so that the step portions 11c, 11e,
The dazzling light due to 11f is not generated.

The step portions 11, 1 formed on the reflecting surface 7
Among 1, ..., Only the third step portion 11c, the fifth step portion 11e, and the sixth step portion 11f are prevented from being exposed to light because the dazzling light is a passing beam distribution pattern. Since the light is radiated slightly above the so-called cut line above, the irregular reflection in the step portions 11, 11, ... Near the portion of the reflection surface 7 forming the cut line becomes the most dazzling light. Because it is easy.

Further, a large number of segments 7a, 7a, ...
The stepped portion is generated not only in the horizontal direction but also in the vertical direction on the reflection surface 7 formed with *. Even if irregular reflection occurs in the step portion extending in the vertical direction, the irregular reflection is a diffuse reflection in the left and right directions, which causes dazzling light. Does not produce upward light.

Reference numeral 18 denotes an extension member disposed between the reflector 4 and the front lens 3, and a reflection surface formed by aluminum vapor deposition is formed on the inner side surface of the extension member 18, and the front opening edge of the reflector 4 is formed. 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 is a waterproof rubber cover for closing the bulb insertion hole formed in the central portion of the rear surface of the lamp body 2 from the rear side.

FIG. 12 shows a modification 4A of the reflector.

This reflector 4A is different from the reflector 4 in the above-mentioned embodiment in that the front shape is circular and the segments are formed symmetrically, and the formation positions of the step portions formed on the reflecting surface are different. Is.

In particular, the reflector 4A shown in this modified example is the shade pieces 15a, 15b, 15c in the above embodiment.
Corresponding to the stepped portions 11c, 11e of the reflecting surface 7,
Among 11f, the one corresponding to the sixth step portion 11f is not formed.

When the shade 6 in the above-mentioned embodiment is used for such a reflector 4A, the shade 20 by the third shade piece 15c of the shade 6 is formed on the portion of the reflection surface 7 where the step portion is not formed. However, such a shadow 20 is formed only on a small portion 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 whose reflecting surface is divided into a plurality of reflecting regions, a front lens arranged so as to cover the front of the reflector, and a reflecting lens. The light source is located slightly forward of the focal point of the surface and a cup-shaped shade that covers the front and side of the front of the light source. The shade is supported by the reflector by the support piece and the rear surface opening of the shade is provided. The light source includes a shade piece projecting from an edge, the shade piece being a step portion formed between the reflection areas of the reflection surface and extending in a substantially horizontal direction, where a dazzling light is likely to occur and the light source. It is characterized in that it is formed so as to be located between and.

Therefore, according to the vehicular headlamp of the present invention, by providing the shade piece at the above-mentioned position, the dazzling light is generated at the step portion formed between each reflection area in the reflector. The light of the light source does not illuminate the portion that is likely to generate, and the dazzling light that has hitherto been generated by the light of the light source illuminating the stepped portion can be reduced or eliminated.

In the above embodiment, the vehicle headlamp of the present invention is applied to the vehicle headlamp in which the reflector is arranged in the lamp body, but the present invention is not limited to this, and the lamp body and the reflector are integrated. The vehicle headlight may be used.

In the above embodiment, the front lens is a completely transparent lens, but the present invention is not limited to this, and most of the desired light distribution pattern depends on the multi-reflector, but it contributes to a part of the light distribution pattern. It is possible to use a front lens having a lens step for forming.

In addition, the reflector shown in the above embodiment,
The structures, shapes and numbers of the segments, stepped portions and other portions are merely examples of the embodiment in carrying out the present invention, and the technical scope of the present invention is not limitedly interpreted by these. I won't.

[Brief description of 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 III-III of FIG. 2 with the shade removed
It is an end view which follows the line.

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

5 is an end view taken along line VV of FIG.

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 a left side view showing the shade used in the present invention in an enlarged manner.

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 as seen from the lower left side in order to explain a state in which a shade formed by a shade piece used in the present invention is formed in a step portion.

FIG. 11 is an enlarged perspective view showing an essential part seen from an obliquely right upper side in order to explain a state in which a shade formed by a shade piece used in the present invention is formed in a step portion.

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

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]

 1 Vehicle headlamp 3 Front lens 4 Reflector 6 Shade 7 Reflective surface 7a Reflective area 10 Light source 11 Stepped portion 11c Stepped portion likely to cause dazzling light 11e Stepped portion likely to cause dazzling light 11f Stepped portion likely to cause dazzling light 14 Support Piece 15 Shade Piece 4A Reflector

Claims (1)

[Claims] 1. A reflector whose reflective surface is divided into a plurality of reflective regions, a front lens arranged to cover the front of the reflector, a light source positioned slightly forward of the focal point of the reflective surface, and a light source of the light source. And a cup-shaped shade covering the front side and the front side, the shade being supported by a reflector by a reflector and having a shade piece protruding from the rear opening edge of the shade, the shade piece being reflective. A vehicle, characterized in that it is formed so as to be located between the light source and a portion of a step portion formed between the reflection areas of the surface and extending in a substantially horizontal direction, which is likely to generate dazzling light. Headlight.