JP2579255Y2 - Variable luminous flux pattern type 4-light headlight - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable luminous flux pattern type four-lamp headlight configured to control a total luminous radiation pattern and to form a fine illuminating pattern according to an operating condition. It is.

[0002]

2. Description of the Related Art As a headlight of an automobile, a variable beam type in which the irradiation pattern of a light beam is changed by changing the position of a filament of a lamp or the direction of a sub-reflector provided in front of a reflector is known. ing.

[0003]

However, it is extremely difficult to form a plurality of suitable irradiation patterns corresponding to various driving conditions of an automobile with one lamp, and the lamp is partially overheated by the lamp. There are problems such as shortening the life of the vehicle, and the incomplete control unit having high brightness, causing glare to oncoming vehicles.

On the other hand, in order to ensure safe driving as a headlight of an automobile, in recent years, in addition to the improvement of visibility corresponding to ordinary driving, crossing driving and right and left turning driving, in addition to the improvement of visibility in a curved road, the visual distance on a curved road has been increased. There is a demand for a variable light distribution type headlamp capable of automatically obtaining a fine light distribution of a preferable irradiating light beam in accordance with all driving conditions of an automobile such as an increase in the number of lights.

The present invention has been made in view of the above-mentioned problem, and controls the superposition of irradiation light beams from two lamps having different light beams arranged side by side to change the light distribution and to change the steering. An object of the present invention is to provide a luminous flux pattern variable type four-lamp type headlamp having a novel structure capable of automatically changing the light distribution according to running conditions such as a rotation angle and a vehicle speed.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, a variable light beam pattern type four-lamp headlight according to the present invention is provided.
As shown in FIG. 1, one of two four-lamp headlights arranged side by side on one side is a luminous flux fixed lamp part 1 forming a fixed light distribution pattern P1 shown in FIG. ,
The other is configured as a variable luminous flux section 2 that forms a movable light distribution pattern P2 composed of a fixed beam section B1 and a movable beam section B2 (movable direction A) shown in FIG. 2B.

Then, the beam movable control means 3 for changing the light distribution of the variable light beam lamp unit 2 and both lamp units 1 and 2 are turned ON,
The gist of the present invention is to perform blinking and beam change control based on information from a glare sensor 5 provided on the front of the vehicle by the lamp blinking control means 4 that performs “OFF” control.

[0008]

According to the above arrangement, the beam movable control means 3 of the variable luminous flux section 2 and the lamp flickering control means 4 of the two luminous sections 1 and 2 are controlled as follows. (1) During normal traveling (when there is no oncoming vehicle and / or preceding vehicle) As shown in FIG. 2 (c-1), the light beam fixed lamp unit 1 and the light beam variable lamp unit 2 are turned “ON”, and FIG. A light distribution pattern is formed by combining the fixed light distribution pattern P1 of FIG. 2A and the movable light distribution pattern P2 of FIG. 2B. (2) Intermediate traveling (when the oncoming vehicle is distant and there is no preceding vehicle) As shown in FIG.
F ", the variable light beam lamp unit 2 is turned" ON ", and the beam movable control means 3 is controlled and operated so that the movable beam unit B2 of the variable light beam lamp unit 2 is positioned at the center of the irradiation pattern. (3) Passing (when an oncoming vehicle and / or a preceding vehicle is present ahead) As shown in FIG. 2 (c-3) or (c-4), the luminous flux fixed lamp unit 1 is "OFF", and the luminous flux is The variable lamp unit 2 is turned “ON”, and the beam movable control unit 3 is controlled to operate so that the movable beam unit B2 of the variable light beam unit 2 is positioned below the horizontal line H of the irradiation pattern.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a variable light pattern type four-lamp headlight according to the present invention will be described below with reference to the drawings.

FIGS. 3 to 5 show a first embodiment in which a mirror-driven headlamp is used for the variable light beam section 2. FIG.

As shown in FIG. 3, in the variable light beam pattern type four-lamp headlight according to the present invention, one of the lamps is located outside the fixed light beam unit 1 and the variable light beam unit 2 is juxtaposed. The front sides of the front lenses 12, 22 of the lamp units 1, 2 are covered by the cover lens 6, or the front lenses 12, 22 are integrally formed, and the front and rear lenses 12, 22 are integrally formed. It is configured to be visually recognizable integrally.

The light beam fixed lamp section 1 shown in cross section in FIG. 3 constitutes a reflector 11 having a substantially rectangular horizontally long opening surface covered by a front lens 12, and a lighting bulb 13 serving as a light source is located on the optical axis L1. The valve socket 14 is fixed to the rear part of the reflector 11 so as to make it work. The reflector 11 has a parabolic reflecting mirror surface 15 having a focal point F1 set with respect to the bulb 13 on its inner surface, and forms a light distribution pattern P1 at the time of lighting as shown in FIG. It has a light distribution that converges at the intersection of the vertical lines V.

As shown in FIGS. 4 and 5, the variable light beam lamp 2 constitutes a reflector 21 having a substantially rectangular horizontally long opening surface covered by a front lens 22, and a bulb 23 having an optical axis L.
2, a valve socket 24 is fixedly provided at the rear of the reflector 21. A focus F2 is provided on the front surface of the reflector 21 with respect to the bulb 23.
Are formed, the upper main reflecting mirror surface 25 and the lower main reflecting mirror surface 26 are each formed of a paraboloid.
26, a concentric sub-reflecting mirror surface 27 is formed in the middle thereof.

In the vicinity of the front lens 22 which covers the lamp chamber 31, a pair of movable mirrors for beam deflection are pivotally mounted between upper and lower walls 28, 28 of the reflector 21 via shafts 29, 29, respectively. 30 and 30 are the sub-reflective mirror surfaces 2
The mirrors are provided symmetrically in the left and right direction in the light beam path reflected from the mirrors 7 and 27.
Is connected to the reflector 21 via the turning arm 32 and the connecting rod 33.
Are connected to mirror driving mechanisms 34, 34, such as a step motor and a rotary solenoid, which are fixed to the rear surface, respectively, and are driven at predetermined angles by a driving signal of the beam movable control means 3 applied to the mirror driving mechanisms 34, 34. It is configured to rotate and change the reflection angle of the light beam from the sub-reflecting mirror surfaces 27 (27) (arrow B) to deflect the irradiation direction of the movable light beam.

The variable light beam lamp unit 2 converts the fixed light beam radiated forward by the main reflecting mirror surfaces 25 and 26 and the light beam reflected by the sub-reflecting mirror surface 27 into a beam deflecting mirror 30.
The movable luminous flux irradiated forward is transmitted through the diffusion step of the front lens 22 to irradiate forward of the lamp, and the fixed beam portion B1 and the sub-reflecting mirror surfaces 27, 27 are reflected by the main reflecting mirror surfaces 25, 26. The light distribution control is performed by the movable beam portion B2 in conjunction with the turning direction of the steering and the vehicle speed as shown in FIG. 7, and the position of the movable beam portion B2 is deflected by the mirror driving mechanisms 34 and 34. The movable angle of the movable mirrors 30, 30 is displaced (arrow B).

FIG. 7 shows a front illuminance distribution and a plane (road surface) illuminance distribution of only the variable luminous flux section 2. Is represented.

Further, since the front illuminance distribution of only the fixed beam unit 1 forms a fixed light distribution pattern shown in FIG. 6, the fixed beam unit 1 blinks depending on the presence or absence of the preceding vehicle and the oncoming vehicle. By controlling, (1) during normal driving (when there is no oncoming vehicle and / or preceding vehicle) (2) during intermediate driving (when there is no oncoming vehicle and there is no preceding vehicle) (3) ) A light distribution pattern corresponding to the traveling conditions when the vehicle is passing by (when an oncoming vehicle and / or a preceding vehicle is present ahead) and the speed condition and the road condition of the own vehicle is formed.

Next, FIG. 8 shows another embodiment of the variable light beam unit 2 and shows a projector type structure in which the reflector is tilted and displaced to change the irradiation light beam pattern. The projector lamp is located near the first focal position of the elliptical reflecting mirror surface 41 of the reflector 40 and the bulb 4
2 and a front lens 43 which also serves as the second focal point of the elliptical reflecting mirror surface 41 is fixedly provided on the opening surface. Then, a part of the light beam is blocked by a rotating shaft 44 which is positioned near the second focal position and is laterally provided below the optical axis, and the light blocking shape is changed according to the rotating position. A gear 46 mounted on a shaft end of a rotating shaft 44 is meshed with a gear 48 mounted on a drive shaft of a step motor 47 so that the shade 45 is rotated. It is composed.

The stepping motor 47 is displaced to a preset rotation angle position by a control device (not shown),
Light distribution patterns as shown in (a) to (c) are obtained. Therefore, the light flux fixed lamp unit 1 is used in combination with the front illuminance distribution (refer to FIG. 6) of only the light beam fixed lamp unit 1 described above. 1) During normal running (when there is no oncoming vehicle and / or preceding vehicle) The fixed light flux lamp unit 1 and the variable light flux lamp unit 2 are turned ON, and the fixed light distribution pattern P1 in FIG. A light distribution pattern is formed by combining the movable light distribution pattern P2 of a). (2) Intermediate traveling (when the oncoming vehicle is distant and there is no preceding vehicle) The fixed light beam 1 is turned off and the variable light beam 2 is turned on
N ", and a light distribution pattern is formed by combining the movable light distribution pattern P2 of FIG. 9B. (3) When passing by each other (when an oncoming vehicle and / or a preceding vehicle is present ahead), the fixed light beam unit 1 is turned OFF, and the variable light beam unit 2 is turned OFF.
N ", and a light distribution pattern is formed by combining the movable light distribution pattern P2 of FIG. 9 (c).

In the above-described embodiment, the variable light beam unit has been described as a mirror type and a projector type having a cam type shade. However, the present invention provides a lamp in which a fixed light beam unit and a variable light unit are paired. It is needless to say that the objective is achieved by the configuration described above, and various other light flux variable lamp units can be configured.

[0021]

[Effect of the Invention] Since the variable light pattern type four-lamp type headlamp according to the present invention is configured as described above, a vehicle light fixture is configured with a fixed light flux light unit and a variable light flux light unit as a pair, and the vehicle is normally driven. It has the feature of dramatically improving the safety of driving at night and in tunnels because the light distribution of the illuminating light beam can be more finely controlled according to the driving conditions such as time, intermediate driving, and passing driving. Therefore, the effect obtained by implementing the present invention is extremely large.

[Brief description of the drawings]

FIG. 1 is a schematic plan sectional view showing the principle of a variable light beam pattern type four-lamp headlight according to the present invention.

FIG. 2 shows an irradiation pattern (a) of a fixed light beam lamp and irradiation patterns (b), (c-1), (c-2),
It is explanatory drawing which shows (c-3).

FIG. 3 is a plan sectional view showing the first embodiment of the variable light pattern type four-lamp headlamp according to the present invention;

FIG. 4 is an exploded perspective view of the light flux variable lamp unit.

FIG. 5 is a front view showing a state where the front lens of the variable light beam lamp unit is removed.

FIG. 6 is an explanatory diagram illustrating a light distribution pattern of a light flux fixing lamp unit.

FIG. 7 is an explanatory diagram showing a light distribution pattern of a light flux variable lamp unit according to running conditions.

FIG. 8 is an exploded perspective view of a variable light beam lamp unit showing another embodiment of a variable light beam pattern type four-lamp headlight according to the present invention.

FIG. 9 is an explanatory diagram showing a light distribution pattern of a light flux variable lamp unit under the same traveling conditions.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fixed light beam part 2 Variable light beam part 3 Beam movable control means 4 Lamp blinking control means 5 Glare sensor 6 Cover lens 12,22 Front lens 11,21 Reflector 13,23 Valve 14,24 Valve socket 15 Parabolic reflection mirror surface 25 Upper main reflecting mirror surface 26 Lower main reflecting mirror surface 27 Secondary reflecting mirror surface

Continuation of the front page (56) References JP-A-3-98202 (JP, A) JP-A-4-17202 (JP, A) JP-A-61-51701 (JP, A) JP-A-1-148635 (JP, A) JP-A-1-137501 (JP, A) JP-A-4-2403 (JP, U) JP-A-2-24402 (JP, U) JP-A-2-95101 (JP, U) Field surveyed (Int.Cl. ⁶ , DB name) F21M 3/18 B60Q 1/124 F21M 3/05

Claims (1)

(57) [Scope of request for utility model registration] 1. A four-lamp headlamp having two light sources arranged side by side on one side, one of which is a light flux fixed lamp part for forming a light distribution pattern centered on the center of the front of the lamp, and the other is an automobile. The light flux changing means provided on the lamp is driven through a control device that is linked with the steering turning angle and / or the traveling speed of the light source, thereby changing the light distribution pattern of the irradiation light flux to form a variable light distribution pattern. Lights, and both lights are selectively turned “ON” and “OFF” according to driving conditions,
A variable light beam pattern type four-lamp headlight, wherein a light distribution pattern is obtained by a combined irradiation light beam of both lamp portions.