JPH0590703U - Light flux pattern variable type 4 headlights - Google Patents

Abstract

(57) [Summary] [Purpose] The distribution of the irradiation light flux is controlled more finely according to the running conditions. [Constitution] A lamp comprising a fixed light flux lamp unit 1 and a variable light flux lamp unit 2 is provided on one side of each of the four-lamp headlights. The light distribution of the fixed light flux lamp unit 1 forms a light distribution pattern centered on the front center of the lamp. The light distribution of the light flux variable lamp unit 2 drives a light flux changing means such as a mirror drive type or a projector type shade drive type provided in the lamp through a control device that is interlocked with a steering turning angle and / or a traveling speed of an automobile. A variable light distribution pattern that changes the light distribution pattern of the irradiation light flux is formed. Both the lamp units 1 and 2 are selectively turned “ON” and “OFF” according to the traveling condition, and an appropriate light distribution pattern is obtained by the combined irradiation light flux of the both lamp units.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a light flux pattern variable type four-lamp headlamp which is configured to control a total irradiation pattern of a light flux so that a fine illumination pattern can be formed according to a driving situation.

[0002]

[Prior Art]

 2. Description of the Related Art Conventionally, as a headlight of an automobile, a beam-variable type has been known 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-reflecting mirror provided in front of a reflector.

[0003]

[Problems to be solved by the device]

 However, it is very difficult to construct multiple suitable irradiation patterns for various driving conditions of a vehicle with a single lamp, and it is possible to shorten the life of the lamp due to partial thermal overload on the lamp, The control unit has a high brightness, and there is a problem that dazzling of an oncoming vehicle may occur.

On the other hand, as a headlight of an automobile, in order to ensure safe driving, in recent years, not only is the visibility improved in general driving, passing in passing, and turning left and right, but also the viewing distance on a curved road. There is a demand for a variable light distribution type headlight that can automatically obtain a fine light distribution of a preferable illuminating light flux according to all driving conditions of an automobile such as an increase in the number of lights.

The present invention was devised in view of the above problems, and changes the light distribution by controlling how light beams emitted from two lamps having different light beams arranged in parallel are superposed. It is an object of the present invention to provide a light flux pattern variable type four-lamp headlamp with a new structure that can automatically change the light distribution according to the traveling conditions such as the rotation angle and the vehicle speed.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the variable light flux pattern type four-lamp type headlamp according to the present invention is, as shown in FIG. 1, one of two four-lamp type headlamps arranged side by side. Is a fixed beam portion 1 for forming a fixed light distribution pattern P1 shown in FIG. 2 (a), and the other is from a fixed beam portion B1 and a movable beam portion B2 (movable direction A) shown in FIG. 2 (b). It is configured as the variable light flux lamp unit 2 forming the movable light distribution pattern P2.

The beam moving control means 3 for changing the light distribution of the variable light flux lamp section 2 and the lamp flashing control means 4 for controlling both the lamp sections 1 and 2 to be “ON” and “OFF” are provided in front of the vehicle. The gist is to perform blinking and beam change control based on information from the glare sensor 5 provided on the surface.

[0008]

[Action]

 According to the above configuration, the beam movement control means 3 of the variable light flux lamp section 2 and the lamp flashing control means 4 of both lamp sections 1 and 2 perform the following control. (1) During normal traveling (when there is no oncoming vehicle and / or preceding vehicle) As shown in FIG. 2 (c-1), the fixed light flux lamp unit 1 and the variable light flux variable lamp unit 2 are turned on, The fixed light distribution pattern P1 of (a) and the movable light distribution pattern P2 of FIG. 2 (b) are combined to form a light distribution pattern. (2) During intermediate traveling (when there is an oncoming vehicle in the distance and there is no preceding vehicle) As shown in FIG. 2 (c-2), the fixed light flux lamp unit 1 is "OFF", and the variable light flux unit 2 is " At the same time, the beam moving control means 3 is controlled so that the movable beam portion B2 of the variable light beam portion 2 is positioned at the center of the irradiation pattern. (3) During passing (when there is an oncoming vehicle and / or a preceding vehicle ahead) As shown in FIG. 2 (c-3) or (c-4), the fixed light flux unit 1 is set to “OFF”, The variable light unit 2 is turned on, and the beam movable control means 3 is controlled and operated so as to position the movable beam unit B2 of the variable light beam unit 2 below the horizontal line H of the irradiation pattern.

[0009]

【Example】

 Hereinafter, preferred embodiments of a light flux pattern variable type four-lamp headlamp according to the present invention will be described with reference to the drawings.

FIGS. 3 to 5 show a first embodiment in which a mirror drive type headlamp is used for the variable light flux lamp section 2.

As shown in FIG. 3, in the light flux pattern variable type four-lamp type headlamp according to the present invention, the light fixture on one side of the headlamp is located outside the light flux fixed light portion 1 and the light flux variable light portion 2 is arranged side by side. The front side of front lenses 12, 22 of both lamps 1 and 2 described later is covered with a cover lens 6 or both front lenses 12, 22 are integrally formed. It is designed so that it can be seen from the front side.

A light flux fixing lamp unit 1 shown in cross section in FIG. 3 constitutes a reflector 11 in which a substantially rectangular laterally long opening surface is covered with a front lens 12, and a lighting bulb 13 serving as a light source is on the optical axis L 1. The valve socket 14 is fixed to the rear portion of the reflector 11 so as to be located at the position. The reflector 11 has a parabolic reflecting mirror surface 15 on the inner surface of which the focal point F1 is set with respect to the bulb 13, and forms a light distribution pattern P1 at the time of lighting as shown in FIG. The light distribution is such that it converges at the intersection of the vertical line V and the vertical line V.

As shown in FIG. 4 and FIG. 5, the variable light flux section 2 constitutes a reflector 21 in which a substantially rectangular laterally long opening surface is covered by a front lens 22, and a bulb 23 is located on the optical axis L2. Thus, the valve socket 24 is fixedly provided at the rear portion of the reflector 21. Then, on the front surface of the reflector 21, an upper main reflecting mirror surface 25 and a lower main reflecting mirror surface 26, which are paraboloids with a focus F 2 set on the bulb 23, are formed, and the main reflecting mirror surface 25, 26, a sub-reflecting mirror surface area 27 having a concentric shape is formed in the middle thereof.

In the vicinity of the front lens 22 that covers the lamp chamber 31, a pair of beam deflection members pivotally installed between the upper and lower walls 28 and 28 of the reflector 21 via shafts 29 and 29, respectively. The movable mirrors 30 and 30 are provided symmetrically on the light flux path reflected by the sub-reflecting mirror surfaces 27 and 27. The movable mirrors 30 and 30 for deflecting both beams include a swivel arm 32 and a connecting rod. The beam moving control means 3 is connected to the mirror drive mechanisms 34 and 34 via mirrors 33, and is connected to mirror drive mechanisms 34 and 34 such as step motors and rotary solenoids fixedly mounted on the rear surface of the reflector 21. The signal is rotationally displaced to a predetermined angle, and the reflection angle of the light beam from the sub-reflecting mirror surfaces 27, 27 is changed (arrow B) to deflect the irradiation direction of the movable light beam.

The variable light flux unit 2 irradiates the fixed light beam radiated forward by the main reflecting mirror surfaces 25 and 26 and the reflected light beam reflected by the sub-reflecting mirror surface 27 forward by the beam deflecting movable mirror 30. The movable light beam is transmitted through the diffusion step of the front lens 22 and is irradiated to the front of the lamp, and the movable beam from the fixed beam portion B1 and the sub-reflective mirror surfaces 27 and 27 is reflected by the main reflecting mirror surfaces 25 and 26. The portion B2 controls the light distribution in conjunction with the turning direction of the steering and the vehicle speed as shown in FIG. 7. The position of the movable beam portion B2 is set by the mirror drive mechanism 34, 34 for both beam deflection. The moving mirrors 30 and 30 are displaced (arrow B) in the pivoting angle.

FIG. 7 shows a front illuminance distribution and a plane (road surface) illuminance distribution only for the variable light flux lamp section 2. Therefore, (1) Light distribution control during low speed / straight running (a-1) (a-2) (2) Light distribution control during low speed / turning traveling (b-1) (b-2) (3) High speed / light distribution control during straight traveling (c-1) (c-2) (4) High speed / Light distribution control (d-1) (d-2) during turning is shown.

Further, since the front illuminance distribution of only the fixed light flux lamp unit 1 forms the fixed light distribution pattern shown in FIG. 6, the fixed light flux unit 1 can be switched depending on the presence or absence of a preceding vehicle and the presence or absence of an oncoming vehicle. By controlling the blinking, (1) during normal traveling (when there is no oncoming vehicle and / or preceding vehicle) (2) during intermediate traveling (when there is an oncoming vehicle in the distance and there is no preceding vehicle) ( 3) A light distribution pattern is formed that corresponds to the traveling conditions during passing (when there is an oncoming vehicle and / or a preceding vehicle ahead) and that corresponds to the speed condition of the own vehicle and the road condition.

Next, FIG. 8 shows another embodiment of the light flux variable lamp section 2 and shows a projector type structure in which the irradiation light flux pattern is varied by tilting and displacing the reflector. In this projector lamp part, a bulb 42 is provided near the elliptical reflecting mirror surface 41 of the reflector 40 near the first focal position, and a front lens 43 which also serves as the second focal point of the elliptical reflecting mirror surface 41 is fixed to the opening surface. It was done. Then, a part of the light flux is blocked by the rotary shaft 44 which is located in the vicinity of the second focus position and laterally installed below the optical axis, and the light blocking shape is changed depending on the rotary position. The cam type shade 45 configured as described above is axially attached, and the gear 46 axially attached to the shaft end of the rotary shaft 44 is meshed with the gear 48 axially attached to the drive shaft of the step motor 47 to rotate the shade 45. It is configured to move.

The step motor 47 is displaced to a preset rotational angle position by a control device (not shown), and a light distribution pattern as shown in FIGS. 9A to 9C is obtained. Therefore, by combining and using the above-mentioned front illuminance distribution of only the fixed flux light unit 1 (see FIG. 6), the fixed flux light unit 1 is controlled to blink depending on the presence or absence of a preceding vehicle and the presence or absence of an oncoming vehicle. (1) During normal traveling (when there is no oncoming vehicle and / or preceding vehicle) The light flux fixed light unit 1 and the light flux variable light unit 2 are turned “ON”, and the fixed light distribution pattern P1 of FIG. A light distribution pattern obtained by combining the movable light distribution pattern P2 of (a) is formed. (2) During intermediate traveling (when there is an oncoming vehicle in the distance and there is no preceding vehicle) The fixed light flux lamp unit 1 is turned “OFF”, the variable light flux lamp unit 2 is turned “ON”, and the movable member shown in FIG. 9B is moved. A light distribution pattern that is a combination of the light distribution patterns P2 is formed. (3) During passing (when there is an oncoming vehicle and / or a preceding vehicle in front) The fixed light flux unit 1 is turned “OFF”, the variable light flux unit 2 is turned “ON”, and the movable unit shown in FIG. 9C is moved. A light distribution pattern that is a combination of the light distribution patterns P2 is formed.

In the above-described embodiment, the variable light flux unit has been described as the projector type having the mirror type and the cam type shade, but the present invention has the fixed light flux unit and the variable light unit as a pair. It is needless to say that the purpose of the invention is to be achieved by the structure of the lamp and various other light flux variable lamp parts can be constituted.

[0021]

[Effect of the device]

 Since the variable light flux pattern type four-lamp headlight according to the present invention is configured as described above, the fixed lamp portion and the variable light flux portion constitute a vehicle lamp, which is used for normal traveling and intermediate traveling. In addition, since it is possible to more finely control the light distribution of the irradiation light flux by dividing it into running conditions such as when passing, it has the feature of dramatically improving running safety at night and in tunnels. The effect obtained by implementing the present invention is extremely large.

[Brief description of drawings]

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

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

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

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

FIG. 5 is a front view showing a state in which a front lens of the variable light flux unit is removed.

FIG. 6 is an explanatory diagram showing a light distribution pattern of a light flux fixing lamp section.

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

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

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 light flux fixed light part 2 light flux variable light part 3 beam movable control means 4 light fixture flashing control means 5 glare sensor 6 cover lens 12,22 front lens 11,21 reflector 13,23 bulb 14,24 bulb socket 15 parabolic reflector surface 25 Upper main reflecting mirror surface 26 Lower main reflecting mirror surface 27 Sub-reflecting mirror surface

Claims (1)

[Scope of utility model registration request] 1. A four-lamp type headlamp is provided with two lamps arranged side by side, one of which is a fixed light flux portion for forming a light distribution pattern centering on the front center of the lamp and the other is an automobile. The light flux changing means provided in the lamp is driven through the control device that is interlocked with the steering turning angle and / or the traveling speed of the above, and the light distribution pattern of the irradiation light flux is changed to form the variable light distribution pattern. As the lighting unit, both the lighting units are selectively turned “ON” and “OFF” according to the traveling condition,
A light flux pattern variable type four-lamp type headlight, characterized in that a light distribution pattern is obtained by a combined irradiation light flux of both lamp parts.