JPH067103U - Projector lamp reflector drive mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] A light distribution suitable for running a vehicle is obtained by the irradiation light flux linked to the rotation angle of the steering wheel. A reflector 4 provided with a bulb 7 for a light source is arranged behind the collimator lens 1, and the collimator lens 1
A shade 9 is arranged between the valve 7 and the valve 7. Reflector 4
Is attached to the collimator lens 1 via a link mechanism 5 pivotally provided so that the optical axis can be deflected, and the deflection of the reflector 4 is controlled by a control motor 18. Shade 9
Is fixed to the collimator lens 1 side.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a reflector driving mechanism for a projector lamp, which is applied to a headlamp system of a variable light distribution projector lamp, in which a light flux emitted from a headlight is deflected to a side on which a vehicle is going to turn when traveling on a curved road. is there.

[0002]

[Prior art]

 When traveling on a curved road, there is a vehicle headlight that can deflect the light emitted from the headlamp toward the side where the vehicle is about to turn in conjunction with the rotation angle of the steering wheel, etc., to ensure visibility in front of the vehicle. It has been demanded, and a variable light distribution type lamp using a projector lamp as shown in FIG. 8 has been conventionally used. That is, the light source bulb 51 is provided at the first focal point F1 of the reflector 50 formed of an elliptical reflecting mirror surface, the optical axis L is shared in front of the optical axis L of the reflector 50, and the second focal point F2 is formed. A collimator lens 52 having its focal point substantially fixed is fixedly provided, and a shade 53 pivotally provided at a second focal point F2 position so as to cross the optical axis L is displaced and driven by an actuator such as a motor 54. The shade 53 is turned (arrow A) via the motor 54 so as to correspond to the steering rotation angle of the light beam. It has a structure to control and drive the vehicle so as to match the traveling direction of the car.

[0003]

[Problems to be solved by the device]

 However, in this type of conventional variable light distribution type lamp, the irradiation light flux is diffused in advance so as to correspond to the angle at which the lamp is swung to the left and right, and the irradiation light flux is blocked by the shade 53 to obtain the required light flux pattern. The light quantity of the bulb 51 serving as a light source must be increased because the light flux is blocked and the thermal efficiency is poor. As a result, there are problems that not only the thermal efficiency and the economic disadvantage due to the use of the large bulb 51 but also the measures against the heat storage of the lamp are necessary.

Further, in the above-described conventional configuration, while the heat storage in the lamp becomes a problem, the drive mechanism section of the shade 53 must be configured in the lamp, so heat countermeasures become a further problem, etc. Had the drawback of. Further, in the above-mentioned conventional configuration, since the light beam is blocked by the shade 53 to form the irradiation pattern, only the two-dimensional change on the optical axis L of the shade 53 is changed to the pattern. Was not reflected, and therefore, there was a problem that the light flux oscillated to the left or right becomes a glare to the oncoming vehicle.

The present invention was devised in view of the above problems, and irradiates the front of a curved road in conjunction with the rotation angle of a steering wheel of an automobile, etc. to ensure excellent visibility and to improve heat efficiency. It is an object of the present invention to provide a reflector driving mechanism of a projector lamp having a new structure capable of obtaining an excellent and preferable light distribution pattern.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a reflector driving mechanism for a projector lamp according to the present invention is provided with a reflector provided with a bulb for a light source behind a collimator lens, and a part of a luminous flux is provided between the collimator lens and the bulb. In a projector lamp having a shade that blocks light, the reflector can be controlled by pivoting the reflector through an optical axis deflection pivoting means that pivots the optical axis relative to the collimator lens. It is a gist that the above-mentioned shade is fixedly arranged on the collimator lens side while the deflection is controlled by such an actuator. The optical axis pivoting and deflecting means can be implemented by connecting the collimator lens side and the reflector side with a plurality of link mechanisms.

[0007]

[Action]

 According to the above configuration, the reflector of the projector lamp is swingably connected to the collimator lens through the link mechanism, and the reflector is oscillated by the controllable actuator such as the control motor to enter the collimator lens. To change the angle of the luminous flux. Therefore, the reflected light flux from the reflector entering the collimator lens is inclined to the left and right or to the left and right and up and down, and the irradiation pattern of the light flux transmitted through the collimator lens is controlled to be deflected to the left and right or to the left and right and up and down. Therefore, by correspondingly controlling the actuator according to the rotation angle of the steering wheel of the automobile, the irradiation light flux of the lamp can be deflection-controlled along the curved path.

[0008]

【Example】

 Hereinafter, an embodiment of a reflector driving mechanism for a projector lamp according to the present invention will be described with reference to the drawings. 1 to 3 show a first embodiment in which an irradiation light beam is one-dimensionally deflected leftward or rightward.

In the drawing, reference numeral 1 denotes a convex lens-shaped collimator lens, which is attached to the front end of a lens mount 3 fixedly mounted on the base plate 2 to form a focal point F on the optical axis L1. Reference numeral 4 denotes a reflector rotatably mounted on the rear end of the lens mount 3 via a link mechanism 5 so as to be displaceable in the direction of arrow B. The reflector 4 has an elliptical reflecting mirror surface 6 having an optical axis L 2. In addition to the above, the bulb 7 for the light source is attached to the bulb socket 8 fixed to the bottom of the elliptical reflecting mirror surface 6 so as to be substantially located at the first focal point F1 on the optical axis L2. The reflector 4 is pivotally mounted via a link mechanism 5 so that the second focal point F2 on the optical axis L2 substantially coincides with the focal point F position of the collimator lens 1 and swings (arrow B).

Reference numeral 9 denotes a shade which is provided on the lens mount 3 so as to be located at a focal point F of the collimator lens 1 (second focal point F2 of the reflector 4) and which is substantially from the optical axes L1 and L2. A cut line is formed so as to block the lower light flux.

The link mechanism 5 is located at the left and right rear ends of the lens mount 3 and has support arms 10 and 10 vertically installed therein. The support arms 10 and 10 pivot one end of the plate-like links 11 and 11. In addition to being freely pivoted, the other end is pivotally pivoted to the left and right front ends of the reflector 4 via support arms 12 and 12, respectively, to form a non-parallel link mechanism with the reflector 4 side open. It is displaced along the swing locus indicated by the chain double-dashed line.

Reference numeral 13 denotes a guide pin protruding from the lower end of the front end of the reflector 4, and the guide pin 13 is a fan-shaped pinion gear rotatably mounted on the rear end of the base plate 2 via a pivot 14. The guide pin 17 of the oscillating rod 16 protruding from 15 is slidably inserted in the groove direction, and the fan-shaped pinion gear 15 is engaged with a drive gear 19 axially attached to a control motor 18 fixed to the base plate 2. The swinging rod 16 is swung by the left or right driving of the control motor 18, and the reflector 4 is swung in the arrow B direction via the guide pin 13. Reference numeral 30 is a potentiometer that outputs the rotation angle of the control motor 18. The angle detection value from the potentiometer 30 is fed back to a control mechanism (not shown) to feed the steering angle of the automobile to the reflector 4. The control rotation angle of the control motor 18 for obtaining the displacement angle θ is obtained.

In the reflector driving mechanism of the projector lamp configured as described above, the second focal point F2 of the reflector 4 becomes substantially coincident with the focal point F of the collimator lens 1, and the shade 9 is fixed at the focal points F and F2. Therefore, when the bulb 7 is turned on, the light flux transmitted through the collimator lens 1 becomes a substantially parallel light flux and illuminates the front side as shown by the thick solid line in FIG. When the steering of the automobile is turned along the curved road R (an example of a right turn is shown in the figure), the control motor 18 is turned via the control mechanism, and the fan-shaped pinion gear 15 is turned. As a result, the reflector 4 is displaced in the direction of arrow B (right) while being supported by the link mechanism 5 via the guide pin 13 engaged with the guide groove 17 of the swing rod 16, and the reflector 4 with respect to the optical axis L1 of the collimator lens 1 is moved. Since the optical axis L2 of the light beam tilts by θ, the light distribution pattern P of the irradiation light beam is deflected to the position shown by the thin solid line in FIG. 3 (in FIG. 3, the broken line shows the light beam blocked by the shade 9). ).

Next, FIGS. 4 to 7 show a second embodiment in which the irradiation light beam is two-dimensionally deflected to the left or right and up and down, and a structure different from that of the first embodiment. Will be explained.

This embodiment differs from the first embodiment in the link mechanism 5, and a rod-shaped link 20 connecting left and right upper and lower angles between the rear end of the lens mount 3 and the front end of the reflector 20. , 20, 20, 20 and both sides of the reflector 4 and the hanging plate portion 3a extending rearward from the lens mount 3 are connected to each other via rod-like hanging links 21 and 21. Both ends of each of the links 20 and 21 are pivotally attached to corresponding members via journal joints 22, and the rod-shaped links 20, 20, 20, 20 are non-parallel links with the reflector 4 side open. In addition to configuring the mechanism, the rod-shaped suspension links 21 and 21 configure a non-parallel link mechanism in which the reflector 4 side is closed.

According to the reflector driving mechanism of the projector lamp configured as described above, when the bulb 7 is turned on, the light flux transmitted through the collimator lens 1 becomes a substantially parallel light flux as shown by a thick solid line in FIG. And illuminate the front. Then, the four rod-shaped links 20, 20, 20, 20 of the parallel link mechanism 5 form a swing locus in the left-right direction (arrow C) shown by a chain double-dashed line in FIG. , 21 form a vertical locus (which is an arc shape of an arrow D having a center at the upper side) shown by a two-dot chain line in FIG.

Therefore, when the steering of the automobile is turned along the curved road R, the control motor 18 is turned through the control mechanism, and the fan-shaped pinion gear 15 is turned, which causes the guide groove 17 of the swing rod 16. The reflector 4 is supported by the rod-shaped links 20, 20, 20, 20 and the rod-shaped suspension links 21, 21 of the link mechanism 5 via the guide pin 13 engaged with the two-dimensional direction (arrows C, D). And the optical axis L2 of the reflector 4 is tilted with respect to the optical axis L1 of the collimator lens 1. As a result, the light distribution pattern P of the irradiation light flux is deflected to the position shown by the thin solid line in FIG. 7, and the deflection locus E forms an irradiation pattern lower than the horizontal line H on both sides to eliminate glare to the oncoming vehicle. be able to.

[0018]

[Effect of device]

 As described above, the reflector driving mechanism of the projector lamp according to the present invention is such that the reflector of the projector lamp is swingably connected to the collimator lens via the link mechanism, and the reflector is a controllable actuator such as a control motor. By oscillating and driving the collimator lens to change the angle of the light beam entering the collimator lens, the illumination pattern of the lamp is deflected to the left or right or left and right and up and down. As a result, the thermal efficiency can be improved, the heat accumulation of the lamp can be eliminated, and various problems caused by thermal stress can be solved.

Further, when the irradiation light flux is swung, the light flux can be controlled downward, so that the glare on the oncoming vehicle can be eliminated, and the effects obtained by implementing the present invention are extremely large.

[Brief description of drawings]

FIG. 1 is a plan sectional view of a main part of a lamp showing a first embodiment of a reflector driving mechanism for a projector lamp according to the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the lamp.

FIG. 3 is an explanatory diagram showing an irradiation pattern by the lamp.

FIG. 4 is a schematic perspective view of a lamp showing a second embodiment of the reflector driving mechanism of the projector lamp according to the present invention.

FIG. 5 is a plan sectional view of a main part of the lamp.

FIG. 6 is a longitudinal sectional view of a main part of the lamp.

FIG. 7 is an explanatory diagram showing an irradiation pattern by the lamp.

FIG. 8 is a schematic plan view of a main part of a conventional projector lamp.

[Explanation of symbols]

 1 Collimator lens 3 Lens mount 4 Reflector 5 Link mechanism 6 Elliptical reflecting mirror surface 7 Valve 9 Shade 10 Support arm 11 Plate link 12 Support arm 13 Guide pin 15 Fan pinion gear 16 Oscillating rod 17 Guide groove 18 Control motor 19 Driving gear 20 Rod -Shaped link 21 Rod-shaped suspension link 22 Journal joint

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location F21M 3/14 9249-3K 3/20 Z 9249-3K

Claims (2)

[Scope of utility model registration request] 1. A projector lamp comprising a reflector provided with a bulb for a light source behind a collimator lens, and a shade for blocking a part of a light beam between the collimator lens and the bulb, wherein: The shade is arranged on the collimator lens side while being pivotally mounted to the collimator lens via an optical axis deflection pivoting means that is pivotally mounted so as to be capable of deflecting the optical axis, and the reflector is deflection-controlled by a controllable actuator. A reflector drive mechanism for a projector lamp, which is fixedly arranged. 2. The reflector driving mechanism for a projector lamp according to claim 1, wherein the optical axis pivoting and deflecting means is a plurality of link mechanisms connecting the collimator lens side and the reflector side.