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Vehicle headlamp

A technology for headlights and vehicles, which is applied in the direction of vehicle lighting systems, headlights, vehicle components, etc., and can solve the problem of not being able to fully increase the luminosity of the driving beam, and not being able to realize small, lightweight and low-cost actuators, and actuator drive Increased power and other problems, to achieve the effect of small size and light weight, low cost, and increased power consumption

Inactive Publication Date: 2007-03-14
KOITO MFG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the actuator driving force required to rotate the movable visor also increases to some extent, and there is a problem that the size, weight, and cost of the actuator cannot be reduced.
[0010] In addition, in the projection type lamp unit, in terms of its structure, since the image of the light source constituting the light distribution pattern is larger than that of the parabolic type lamp unit, therefore , in the case of beam switching by the movable visor, in particular, there is still the problem that the luminosity of the driving beam cannot be sufficiently improved

Method used

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  • Vehicle headlamp
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Embodiment Construction

[0061] Hereinafter, preferred embodiments of the vehicle headlamp according to the present invention will be described in detail with reference to the accompanying drawings.

[0062] Fig. 1 is a schematic longitudinal sectional view of a vehicle headlamp according to an embodiment of the present invention.

[0063] The vehicle headlamp 10 of the present embodiment, as shown in FIG. Unit 18.

[0064] As shown in FIG. 1 , the lamp unit 18 is supported by the lamp body 12 via a frame 22 , and the frame 22 is supported by the lamp body 12 via an unillustrated dimming mechanism. The dimming mechanism is a mechanism for finely adjusting the installation position and installation angle of the lamp 18. In the stage after the alignment adjustment is performed, the central axis Ax of the lens of the lamp unit 18 is downward at about 0.5 to 0.6 degrees with respect to the front-rear direction of the vehicle. .

[0065] The frame 22 is formed in a substantially rectangular frame shape ...

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Abstract

The invention provides a vehicle headlight with an actuator miniaturized and weight-saved and with luminance at irradiation effectively enhanced without adversely affecting on formation of a low-beam light distribution pattern, in a projector type one equipped with a movable shade. The vehicle headlight (10) is provided with a projection lens (11), a light source bulb (23), a reflector (25) reflecting direct light from the light source bulb (23) toward front, a movable shade (30), an actuator (20) moving the movable shade (30) between a shielding position and a shielding relaxation position. The movable shade (30) is installed in free rotation around a rotational axis line extended in a car width direction in the vicinity of a lens center axis (Ax), and the actuator (20) gives driving force to an end of a rod member (40) with the other end coupled with the movable shade (30) in a length direction through an operation direction changing mechanism (50) to rotate the movable shade.

Description

technical field [0001] The present invention relates to a vehicle headlamp, and more particularly, to a projection type vehicle headlamp having a variable light distribution function capable of changing the light distribution of the headlamp according to the running conditions of the vehicle. Background technique [0002] Conventionally, there is known a projection-type vehicle headlamp having a lamp unit configured to transmit light (light source light) from a light source bulb arranged on an optical axis extending in the front-rear direction of the vehicle through a reflector. The reflection is converged towards the front and deflected to the optical axis, and the reflected light is irradiated to the front of the lamp through the projection lens arranged in front of the reflector. [0003] In the case of such a projection lamp unit, a shading plate capable of shielding part of the reflected light from the reflector is usually provided between the projection lens and the re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F21S8/10F21V13/12F21V14/00F21Y101/00
CPCF21S48/1778F21S48/1335F21S41/172F21S41/321F21S41/365F21S41/43F21S41/47F21S41/60F21S41/689
Inventor 大盐洋彦
Owner KOITO MFG CO LTD
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