JPH087608A - Vehicle headlights - Google Patents

Abstract

(57) [Abstract] [Purpose] To improve the reflection function of the lower surface wall of the lamp body in a so-called slant type vehicle headlamp in which the front lens is inclined forward and downward. In a lamp body 1 formed so as to be continuous in front of a reflector 3, a diffuse reflection surface 10 is formed on all or a part of an inner surface of a lower surface wall 1b of the lamp body 1, and a front surface that covers a front opening of the lamp body 1 is covered. The lens 7 is mounted so as to be inclined forward and downward of the lamp body 1. Lamp body 1
The diffuse reflection surface 10 formed on the inner surface of the lower surface wall 1b of the inside of the lamp chamber 8 on the inner surface of the front lens 7, especially the lower surface wall 1
The light reflected to the b side is emitted as diffuse reflected light L2, L2 ... In front of the front lens 7, and the visibility toward traffic information boards and traffic signs installed above the vehicle lane is increased by the diffused light directed upward. Is to get.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a vehicular lamp, and more particularly to a vehicular headlamp having improved reflection performance by a lower wall surface of a lamp body which constitutes a so-called slant type vehicular lamp. is there.

[0002]

2. Description of the Related Art As shown in FIGS. 6 and 7, a conventional vehicle headlamp has a lamp body 53 having a reflector 52 having a reflecting mirror surface 51 formed on the inner surface of the rear portion thereof.
Front lens 5 is installed in a substantially upright position in the front opening of the
4, the lamp chamber 55 is covered to form a lamp chamber 55, and a bulb 57 for a light source mounted on a socket 56 mounted on the rear portion of the reflector 52 is provided with a substantially focal point on the optical axis CL of the reflecting mirror surface 51 in the lamp chamber 55. It is configured to be supported at the F position and emit a parallel light flux L toward the front of the lamp from the parabolic reflection surface mirror surface or the free curved surface of the reflection mirror surface 51 when the bulb 57 is turned on.

[0003]

Therefore, in the conventional vehicle headlamp constructed as described above, regardless of whether the high beam irradiation or the low beam irradiation is performed while the vehicle is traveling,
Light distribution pattern P required for traveling of a vehicle traveling at a predetermined speed
Since it is configured to be able to illuminate the driver of an oncoming vehicle in accordance with various conditions such as preventing dazzling of the driver and ensuring visibility on the roadside, it is possible to see the vicinity of the vehicle, especially above the vicinity of the vehicle when the vehicle is stopped. It was not structured so that visibility could be obtained by irradiation (Fig. 7).
reference). However, in recent years, not only on highways but also on general roads for vehicles, a large number of road signs and regulatory signs X are displayed at a predetermined height on the road of the vehicle lane. When approaching to the vicinity of, or especially when the vehicle is stopped at an intersection or the like, the road sign X or the like displayed above the road cannot be clearly visually recognized by the illumination light of the vehicle headlight, There was a problem of overlooking or misidentifying the traffic information required for driving. Therefore,
In order to solve this problem, it is proposed to form a lens step (not shown) on the front lens 54 to ensure the above-mentioned visibility. However, when such a lens step is formed, the lens is formed. Not only is the load increased, but a so-called through-type lens cannot be used as the front lens 54, and there is a problem that the designability of the front lens 54 as a vehicle headlamp is limited. It was Further, in the conventional vehicle headlamp, since the front lens 54 is erected substantially vertically as described above, the air resistance received on the surface of the front lens 54 during traveling of the vehicle is large, and the vehicle travels. It also had problems such as reduced fuel consumption and instability of the vehicle during high-speed driving.

The present invention was devised in view of the above problems, and is a so-called slant type vehicle headlamp in which a front lens is inclined forward and downward in order to reduce air resistance to a lamp mounted on the vehicle. In the above, a diffuse reflection surface is formed on the inner surface of the lower surface of the lamp body that is not used to form the light distribution pattern required for vehicle traveling, and the light is reflected by the inner surface of the inclined front lens toward the lower part of the lamp room to diffuse the light flux. It is positioned above the driver's seat of the vehicle when the vehicle is stopped, etc., without changing the light distribution pattern necessary for vehicle traveling by re-reflecting by the reflecting surface and emitting the reflected light forward and upward through the front lens. The present invention relates to a vehicle headlamp with improved visibility for road signs and the like.

[0005]

In order to achieve the above object, a vehicle headlamp according to the present invention comprises a front lens in a front opening of a lamp body having a reflector having a parabolic reflector surface on the inner surface of the rear portion. In order to form a lamp chamber, a bulb serving as a light source is arranged at a substantially focal position of a parabolic reflecting mirror surface of this reflector, and a vehicular lamp configured to emit a substantially parallel luminous flux, A diffuse reflection surface is formed on all or part of the inner surface of the lower surface of the lamp body formed so as to extend forward and be continuous, and the front lens is mounted so as to incline toward the lower front of the lamp body. Is the gist.

As the diffuse reflection surface formed on the inner surface of the lower surface wall, a large number of cylindrical reflectors oriented in the front-rear direction of the lower surface wall are formed in parallel on the front surface or a part of the lower surface wall, and in addition to graining and other processes. The diffuse reflection structure is configured to radiate diffused and diffused light dimly upward and forward of the headlight through the front lens.

Further, the diffuse reflection surface formed on the surface of the lower surface wall of the lamp body can be configured by interposing an auxiliary reflection plate which is formed separately from the lower surface wall of the lamp body.

[0008]

According to the above construction, a part of the luminous flux emitted from the bulb carried at the substantially focal position of the parabolic reflecting mirror formed on the inner surface of the reflector is inclined forward and downward toward the front opening of the lamp body. As described above, the inner surface of the covered front lens is reflected toward the diffuse reflection surface formed on the inner surface of the lower surface wall of the lamp body, and the reflected light diffusely reflected by the diffuse reflection surface is forward of the lamp through the front lens. Irradiate above. Therefore, the visibility of the traffic information displayed above the vehicle can be ensured through the windshield of the vehicle stopped at the intersection, etc., and the diffusion formed on the inner surface of the lower surface of the lamp body can be performed even while the vehicle is running. The light flux emitted to the front of the lamp by the reflecting surface does not cause dazzling to the driver of the oncoming vehicle, and the safety of the vehicle lamp is not impaired.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle headlamp according to the present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 is a lamp body having a substantially rectangular shape when viewed from the front. The lamp body 1 has a substantially ellipsoidal reflector 3 having a parabolic reflector surface 2 on the inner surface of the rear portion thereof, and an upper surface wall 1a and a lower surface wall 1b protruding forward of the reflector 3 which are integrally formed. And the optical axis C of the parabolic reflecting mirror surface 2
A bulb 4 for a light source is carried at a focal point F position on L, and light emitted from the bulb 4 is emitted as a substantially parallel light flux L1 toward the front of the lamp through the parabolic reflector surface 2. . This valve 4 is attached to a socket 6 which is detachably attached through a socket insertion hole 5 formed on the rear surface of the reflector 3 and is inserted thereinto. It is made to be able to be carried out. Also,
In the opening formed on the front surface of the lamp body 1,
A front lens 7 having a substantially rectangular front shape that substantially matches the shape of the opening is attached to form a sealed lamp chamber 8 inside the front lens 7. In this embodiment, the front lens 7 is
A seal leg portion 7a integrally formed on the outer periphery of the lamp body 1 is fitted with an adhesive 9 into a seal groove 1c formed at the outer peripheral edge portion of the front opening of the lamp body 1 and integrally bonded. The front lens 7 is made of a transparent synthetic resin material such as acrylic resin, and is inclined forward and downward along the shape (not shown) of the vehicle body side lamp mounting hole and in the outer longitudinal direction. It is formed so as to have a so-called slant type shape, which is slightly curved toward. By inclining the front lens 7 forward and downward in this way, it is possible to conform to the design shape on the vehicle body side, reduce air resistance during vehicle traveling, and obtain stability of vehicle traveling.

In general, the lamp body 1 is formed such that the lower surface wall 1b projects forward of the upper surface wall 1a in front of the reflector 3, and in the longitudinal sectional shape thereof, inclines forward and downward of the reflector 3. The front lens 7 is attached to the front opening of the lamp body 1 having such an opening. However, such an inclined structure of the front lens 7 is not necessarily formed only by the protrusion amount of the lower surface wall 1b on the lamp body 1 side, and the protrusion amount of the front lens 7 itself toward the rear of the seal leg portion 7a is not limited to the above. Of course, it can be formed by adjusting.

On the inner surface of the lower surface wall 1b of the lamp body 1 constructed as described above, the illumination light of the bulb 4 which is re-reflected downward into the lamp chamber 8 by the inner surface of the front lens 7 is further forwardly above the front lens 7. A diffuse reflection surface 10 that reflects light is formed. The diffuse reflection surface 10 is for diffusing and emitting the reflected light of the bulb 4 to the front upper part of the front lens 7 as described above, and is slightly downward as the distance from the reflector 3 increases with respect to the optical axis CL of the reflector 3. It is formed so as to be inclined (arrow A). The angle of inclination of the lower surface wall 1b toward the front of the lamp is such that the light emitted from the bulb 4 or the light reflected by the reflector 3 is reflected by the inner surface of the front lens 7 inside the lamp chamber 8 depending on the inclination angle of the front lens 7. It is tilted to such an extent that it can be effectively emitted through the front lens 7 while preventing re-reflection to the front lens 7. Therefore, it suffices to obtain the necessary diffused / reflected light amounts L2, L2 ... To the front of the front lens 7, and it is not necessary to form the entire surface of the lower surface wall 1b of the lamp body 1. In the present embodiment, the diffuse reflection surface 1
Reference numeral 0 indicates that a large number of cylindrical reflectors 10a facing the front-rear direction are formed in parallel on the entire surface or a part of the lower surface wall 1b of the lower surface wall 1b of the lamp body 1. Therefore, in the light chamber 8 the irradiation light that is not a parallel light beam and the reflected light that is reflected by the inclined upper inner surface of the front lens 7 among the light beams emitted from the bulb 4 arranged at the focal point F position of the parabolic reflection mirror surface 2 Reflected and refracted, bottom wall 1b
The diffused light area Y diffused and reflected by the diffuse reflection surface 10 formed on the surface of the
(See FIG. 5) can be formed and emitted. This reflected light makes it possible to obtain the visibility of the traffic information plate, the traffic sign, and the like X arranged above the traveling lane of the vehicle, so that it is possible to prevent the information necessary for traveling the vehicle from being overlooked. Further, due to the reflecting action of the diffuse reflection surface 10,
Since the light flux that directly irradiates the lower surface wall 1b of the lamp body 1 from the bulb 4 and illuminates a specific portion of the lower surface wall 1b can be diffused and reflected, a part of the lower surface wall 1b abnormally emits light and the headlight is illuminated. It also has the effect of solving problems such as impairing the appearance of the product.

The vehicle headlight according to the present invention is a shade 1
It is of course possible to irradiate the front of the vehicle without changing the light distribution pattern P of the high beam and the low beam, which is formed by No. 1 and is necessary for the normal traveling of the vehicle as described above. By forming the diffuse reflection surface 10 as described above, the lamp wall portion of the lamp body 1 which is not conventionally used for forming the light distribution pattern P required for vehicle traveling is used as a traffic information board or a traffic sign. It is a useful thing that can be effectively used to ensure visibility.

In the illustrated example, the diffuse reflection surface 10 is directly formed on the surface of the lower surface wall 1b of the lamp body 1, but the diffuse reflection surface 10 is the lower surface wall 1b of the lamp body 1 itself. There is no need to provide it, and a separately configured diffuse reflection plate may be attached to the surface of the lower surface wall 1b. Further, the cylindrical reflector 10a
Instead of this, it is needless to say that the structure may be modified into a structure having a light diffusing function such as embossing. It should be noted that the inner surface of the front lens 7 has a structure in which a flat surface is formed by omitting the structure of a light diffusion structure such as a light control step in order to enhance the light reflectivity particularly on the surface of the front lens 7. The diffuse reflection surface 10 formed on the side of the lower surface wall 1b on the first side is formed or attached in a slightly inclined posture so as not to emit non-standard illumination light as a vehicle headlamp. The diffuse reflection surface 10 can be formed on the inner surface of the seal leg portion 7a of the front lens 7 if necessary.

[0014]

Since the vehicle headlamp according to the present invention is constructed as described above, the luminous flux re-reflected into the lamp chamber by the inner surface of the front lens without forming a light distribution pattern required for vehicle traveling. Is diffused and emitted forward and upward by the diffuse reflection surface configured on the lower wall side, it is possible to effectively utilize the front lens for improving visibility on traffic information boards and traffic signs. The effect of reducing the air resistance to the vehicle headlamp by inclining downward to stabilize the vehicle running and reducing the lens load by mounting a through type front lens on the vehicle headlamp Therefore, the effect obtained by implementing the present invention is extremely large.

[Brief description of drawings]

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

FIG. 2 is a side sectional view of the same.

FIG. 3 is a perspective view showing an example of a diffuse reflection surface formed on the bottom wall of the lamp body in the same manner.

FIG. 4 is a schematic explanatory view showing a reflecting action of the vehicle headlamp according to the present invention.

FIG. 5 is an explanatory view showing a light distribution pattern by the vehicle headlamp according to the present invention.

FIG. 6 is a side sectional view showing a structure of a conventional vehicle headlamp.

FIG. 7 is an explanatory view showing a light distribution pattern of a conventional vehicle headlight.

[Explanation of symbols]

 1 Lamp Body 1a Upper Surface Wall 1b Lower Surface Wall 2 Parabolic Reflecting Mirror Surface 3 Reflector 4 Bulb 6 Socket 7 Front Lens 8 Lighting Room 10 Diffuse Reflecting Surface

Claims (3)

[Claims] 1. A front lens is attached to a front opening of a lamp body having a reflector having a parabolic reflector surface on a rear inner surface to form a lamp chamber, and a substantially focal position of the parabolic reflector surface of the reflector. In a vehicular lamp configured to emit a substantially parallel light flux by arranging a bulb as a light source, the lamp body formed on the whole or a part of the inner surface of the lower surface of the lamp body extending continuously in front of the reflector. A vehicular headlamp, characterized in that a diffuse reflection surface is formed and the front lens is mounted so as to incline toward the front lower side of the lamp body. 2. The diffuse reflection surface formed on the inner surface of the lower surface wall is characterized in that a large number of cylindrical reflectors facing the front-back direction of the lower surface wall are formed in parallel on the front surface or a part of the lower surface wall. The vehicle headlamp according to claim 1. 3. The vehicle headlamp according to claim 1, further comprising an auxiliary reflecting mirror having a diffuse reflection surface formed on the surface of the lower surface wall.