JPH067105U - Movable reflector driving mechanism in headlight with variable light distribution - Google Patents

Abstract

(57) [Abstract] [Purpose] The reflecting mirror drive mechanism and the reflection angle adjusting mechanism are unitized to improve the workability of assembling the lamp, and the adjustment of the reflection angle after the work of assembling the movable reflecting mirror to the headlight. To enable. In the headlight, a movable reflecting mirror 13 for beam deflection is provided in a partly reflected light beam path from a reflecting mirror surface of a reflector 1.
13 is rotatably supported, and the movable reflecting mirror 13,
The movable reflecting mirror drive mechanism unit 8 for rotatively displacing 13 to deflect the irradiation direction of the partial luminous flux is configured. The movable reflecting mirror drive mechanism unit 8 is assembled to the reflector 1 from the opening side thereof, and the movable reflecting mirror drive mechanism unit 8 is provided with a reflection angle adjusting mechanism 17 for adjusting the reflection angle of the movable reflecting mirror 13. It was done.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of a headlight for a vehicle such as an automobile, in particular, a movable reflecting mirror for beam deflection is configured in a lamp chamber, and the movable reflecting mirror for beam deflection is driven to be displaced to change the distribution of irradiation light. The present invention relates to a movable reflecting mirror drive mechanism in a variable light distribution headlamp.

[0002]

[Prior art]

 Conventionally, as a variable light distribution type vehicle headlamp, as shown in FIG. 17, a bulb for lighting which is a light source provided on the front surface of the housing 51 by covering an opening surface of a housing 51 with a front lens 52. A main reflecting mirror surface 54 and a sub-reflecting mirror surface (not shown) are formed with respect to 53, and the movable reflecting mirror driving mechanism 56 displaces the reflected light flux position of the sub-reflecting mirror surface in the lamp chamber 55 to drive the angle. A structure in which a movable reflecting mirror 57 for deflecting a beam for changing the beam is pivotally installed is used. Then, with respect to the main luminous flux distribution pattern formed by the reflected luminous flux from the main reflecting mirror surface 54, the reflected luminous flux from the sub-reflecting mirror surface is applied to the movable reflecting mirrors 57, 57 for beam deflection, and the luminous flux is emitted. The sub-beam distribution pattern is formed in different directions and the overall distribution pattern is changed.

As shown in FIG. 18, the movable driving machine 56 is based on a guide roller 59 axially provided at the lower end of the swing end of a movable reflecting mirror 57 whose one end is rotatably pivoted by a rotary shaft 58. Since it slides along a guide groove 61 formed in the plate 60 and can be displaced within a predetermined range, a gear 62 axially attached to the rotary shaft 58 and a drive gear 64 axially attached to the drive shaft of the motor 63. The gears are rotationally connected via a reduction gear 65, and the gear 62 and the gear of the position detection meter 66 are meshed with each other to output a displacement angle signal of the movable reflecting mirror 57.

The headlight configured as described above switches between the traveling beam and the passing beam, and when the vehicle travels on a curved road, a part of the beam is interlocked with the rotation angle of the steering wheel and is operated so as to swing in the turning direction of the vehicle. It was used for lighting. In addition, the irradiation light flux is diffused / converged in conjunction with the vehicle speed to increase or decrease the illuminance near the optical axis, and when an oncoming vehicle exists (especially when driving in rainy weather), the beam that causes glare to the oncoming vehicle is generated. It was also possible to operate by swinging to the driving lane side of the own vehicle and used for lighting.

[0005]

[Problems to be solved by the device]

 However, the movable reflecting mirror driving mechanism in this type of variable light distribution headlamp is such that the movable reflecting mirror driving mechanism 56 is fixedly installed on the lower surface or below the main reflecting mirror 54, and the movable reflecting mirror driving mechanism 56 moves the movable reflecting mirror. It has a structure in which a movable reflecting mirror 57 for displacing a beam for displacing the mirror 57 to change the angle is pivotally installed, and the mounting position of the movable reflecting mirror 57 with respect to the main reflecting mirror surface 54 is determined. Therefore, if there is a manufacturing error such as a screwing error or a gear meshing error at the time of this assembly manufacturing, the error may cause glare from the movable reflecting mirror 57, and once assembled and completed, However, there is a problem that it is difficult to correct such an error of the movable reflecting mirror 57.

The present invention has been made in view of the above problems, and in a lamp including a movable reflecting mirror for beam deflection, the movable reflecting mirror, its driving mechanism, and a reflection angle adjusting mechanism are unitized. In addition to improving the workability of assembling the lamp, the angle of reflection of the movable reflector can be adjusted after the work of assembling the movable reflector on the headlight to eliminate glare from the reflected light flux, thus ensuring vehicle operation safety. It is an object of the present invention to provide a movable reflecting mirror drive mechanism in a variable light distribution type headlight that has improved the above.

[0007]

[Means for Solving the Problems]

 In order to achieve the above object, the movable reflector driving mechanism in the variable light distribution type headlamp according to the present invention comprises a lighting chamber provided with a lighting bulb at the bottom of a reflector whose opening surface is covered by a front lens. In the headlight, a movable reflecting mirror for beam deflection is rotatably supported in the partially reflected light flux path from the reflecting mirror surface of the reflector, and the movable reflecting mirror is rotatably displaced to irradiate the partial light flux. A movable reflecting mirror drive mechanism unit that deflects the direction is constructed, and the movable reflecting mirror drive mechanism unit is assembled to the reflector from the opening face side thereof, and the movable reflecting mirror drive mechanism unit reflects on the movable reflecting mirror drive mechanism unit. The gist is that a reflection angle adjustment mechanism for adjusting the angle is attached.

In the movable reflecting mirror drive mechanism unit, a reflection angle adjusting mechanism is configured on a mounting substrate that rotatably supports a rotating shaft fixed to at least an upper edge or a lower edge of the movable reflecting mirror. Can be mounted on the headlight.

[0009]

[Action]

 According to the above configuration, since the movable reflecting mirror drive mechanism that is unitized is assembled from the opening side of the reflector that constitutes the variable light distribution type headlamp, the reflection error of the movable reflecting mirror is adjusted by assembling the lamp. Fine adjustments can be made not only during work but also after the lamp is completed. In particular, the reflection angle adjustment mechanism for adjusting the reflection angle of the movable reflection mirror is attached to the movable reflection mirror drive mechanism unit, whereby the reflection angle of only the movable reflection mirror can be adjusted easily and accurately.

[0010]

【Example】

 An embodiment of a movable reflector driving mechanism in a variable light distribution type headlamp according to the present invention will be described below with reference to the drawings. 1 to 4 show a first embodiment of the present invention. In the drawing, reference numeral 1 denotes a reflector in which a substantially rectangular laterally long opening surface is covered by a front lens 2, and a bulb socket 4 is fixed to the bottom of the reflector 1 so that a bulb 3 for a light source is located on the optical axis. I am doing it. On the front surface of the reflector 1, there are formed an upper main reflecting mirror surface 5 and a lower main reflecting mirror surface 6 which are paraboloids whose focus is set at a predetermined position with respect to the valve 3, and both main reflecting mirror surfaces. Reference numerals 5 and 6 are formed in the middle thereof to form concentric sub-reflecting mirror surfaces 7 and 7. Reference numeral 8 denotes a movable reflecting mirror drive mechanism unit that drives a movable reflecting mirror 13 that is vertically provided in the lamp chamber 10 through notches 9 formed at two locations inside the front lens 2 on the upper wall of the reflector 1.

FIG. 3 shows a state in which the movable reflecting mirror drive mechanism unitized is assembled to the reflector. This movable reflecting mirror drive mechanism unit 8 is provided with a rotating shaft 12 hung downward to be inserted into the lamp chamber 10 of the reflector 1 on one side supporting portion 11a of the mounting substrate 11, and the rotating shaft 12 is attached to the rotating shaft 12. A rotary solenoid and a step motor in which a movable reflecting mirror 13 is rotatably pivoted and a swing arm 14 fixed to the movable reflecting mirror 13 is fixed to the other side 11b of the mounting substrate 11 via a connecting rod 15. It is connected to the driving machine 16 such as. The movable reflecting mirror drive mechanism unit 8 configured as described above includes two movable reflecting mirrors 13 and 13 for beam deflection, which form a pair, from the cutouts 9 and 9 above the reflector 1 to the sub-reflecting mirror surface 7 thereof. , 7 are installed symmetrically with respect to the light beam path, and are rotationally displaced to a predetermined angle by a drive signal applied to the driving machine 16 to change the reflection angle of the light beam from the sub-reflecting mirror surfaces 7 and 7 so that the movable light beam is movable. It is configured to deflect the irradiation direction of.

As shown in FIG. 4, the movable reflecting mirror 13 is formed with a rib 13c vertically penetrating the shaft hole 13b on the back side of the mirror surface portion 13a, and the shaft 12 is formed in the shaft hole 13b. The structure is such that it can be inserted freely. In addition, the rotary arm 14 projecting in the circumferential direction on the upper portion of the rib 13c can be pivotally displaced at a predetermined angle by a driving machine 16 via a connecting rod 15.

Reference numeral 17 is a reflection angle adjusting mechanism formed on the upper side of the mounting substrate 11. The reflection angle adjusting mechanism 17 is bent in a crank shape in which the movable reflecting mirror 13 is axially installed and raised, and a screw hole 19 screwed into a rising portion 18 connected to the support portion 11a, and a mounting portion. The adjustment screw 22 is screwed between the insertion holes 21 that are transparently provided in the rising portion 20 that is bent at a desired position of the substrate 11. As shown in FIG. 4, when the adjustment screw 22 is rotated, the reflection angle adjusting mechanism 17 causes the adjustment screw 22 to have a rising portion 18 on which the movable reflecting mirror 13 is axially installed by a washer 23 for retaining. Can be tilted to change the tilt angle of the movable reflecting mirror 13 in the directions of arrows A and B, and the reflection angle of the movable reflecting mirror 13 can be adjusted.

FIG. 5 shows a modification of the reflection angle adjusting mechanism. The reflection angle adjusting mechanism 24 has a circular arc-shaped lower end of an extending portion 25 bent so as to surround the opening of the reflector 1 in a crank-shaped bent supporting portion 11a on which the movable reflecting mirror 13 is provided. The groove 26 is formed, and the screw 27 is screwed into the outer surface of the reflector 1 from the groove 26. Then, when the screw 27 of the extending portion 25 is loosened, the tilting angle is changed in the directions of arrows C and D with the extending portion 25 and the supporting portion 11a of the movable reflecting mirror 13 as the center of rotation. The reflection angle of 13 can be adjusted.

FIG. 6 shows another modification of the reflection angle adjusting mechanism. This reflection angle adjusting mechanism 28 is such that the adjusting screw 22 is screwed into a screw hole 29 screwed in front of the crank-shaped bent supporting portion 11a on which the movable reflecting mirror 13 is provided, that is, on the opening side of the reflector 1. It was done. When the adjusting screw 22 is rotated, the reflection angle adjusting mechanism 28 contacts the upper end of the adjusting screw 22 with the upper surface of the reflector 1 to change the tilt angle of the movable reflecting mirror 13 in the arrow E and F directions. Thus, the reflection angle of the movable reflecting mirror 13 can be adjusted.

7 to 9 show another structure of the movable reflecting mirror. In the description of the above embodiment, the rib 13c penetrating the shaft hole 13b is formed in the vertical direction on the movable reflecting mirror 13 side, but conversely, the rib 13c is rotated from the rotation center direction on the movable reflecting mirror 13 side. Even if the shaft 30 is provided so as to project, the bearing 31 is formed on the side of the reflecting mirror drive mechanism 8 and the turning arm 14 is fixed to the tip of the turning shaft 30, the turning can be performed in the same manner as above. You can The rotating shaft 30 is fixed to a rib 13c formed on the back surface of the movable reflecting mirror 13 as shown in FIG. 7, and fixed to the upper edge of the movable reflecting mirror 13 as shown in FIG. Alternatively, as shown in FIG. 9, the movable reflecting mirror 13 may be sandwiched and fixed by a sandwiching plate 32 having a substantially U-shaped cross section fixed to the lower end of the rotating shaft 30.

FIGS. 10 to 16 show a second embodiment of the present invention in which the movable reflecting mirror is configured to be supported from above and below the reflector. The movable reflecting mirror drive mechanism unit 33 in the present embodiment has a center of rotation with respect to upper and lower ends 34a, 34b of a mounting frame 34 which is bent so that the front surface thereof has a substantially U-shape so as to surround the opening of the reflector 1. The movable reflecting mirror 13 penetrating the rotary shaft 35 is pivotally mounted at its own position, and the rotary arm 14 fixed to the upper end of the rotary shaft 35 is connected to the other side of the mounting frame 34 via the connecting rod 15. It is connected to the driving machine 16 fixed to the side. The movable reflecting mirror drive mechanism unit 33 configured as described above is configured so that it can be separately assembled to the headlight as in the first embodiment. 33 are mounted symmetrically on the light flux paths of the sub-reflecting mirror surfaces 7, 7 constituting the reflector 1, respectively, and are rotatably displaced at a predetermined angle by a drive signal applied to the driving machine 16 to form a sub-reflecting mirror surface. The irradiation direction of the movable light beam is changed by changing the reflection angle of the light beam from 7. In particular, in the second embodiment, since the movable reflecting mirrors 13 for beam deflection are rotatably supported in the up-down direction, strong and stable reflection against vibration during traveling of the vehicle is possible. In addition, since the rotary shaft 35 penetrates the movable reflecting mirror 13, the movable reflecting mirror 13 is tilted during use of the headlight without applying an excessive force to the rotating shaft 35. Not really.

Reference numeral 36 denotes a reflection angle adjusting mechanism formed on the side surface of the mounting frame 34, and as shown in FIG. 11, a screw threaded to a rising portion 37 that is erected sideways under the mounting frame 34. The adjusting screw 22 is screwed between the hole 38 and the contact plate 39 bent at a desired position near the drive unit 16. In the reflection angle adjusting mechanism 36, when the adjusting screw 22 is rotated, the tip of the adjusting screw 22 comes into contact with the contact plate 39, and the tilt angle in the directions of arrows G and H with the upper portion of the mounting frame 34 as the rotation center. The angle of reflection of the movable reflecting mirror 13 can be adjusted by changing it.

FIG. 12 and FIG. 13 show a modified example regarding a method of configuring a rotary shaft with respect to the movable reflecting mirror. In the above description of the embodiment, the movable reflecting mirror 13 has the rotating shaft fixedly provided so as to penetrate from the upper portion to the lower portion. However, as shown in FIG. 12, the rotating shaft 35 is fixed to the movable reflecting mirror 13. A rib 13c formed on the back surface of the movable reflecting mirror 13 is fixed through the rib 13c, or as shown in FIG. 13, the movable reflecting mirror 13 is clamped at the upper and lower sides by a clamping plate 32 fixed to one end of the rotating shaft 35. May be.

14 and 15 show modifications of the movable reflecting mirror and the reflection angle adjusting mechanism. That is, even if the movable reflecting mirror 13 is penetrated through the shaft hole 13b in the vertical direction and the pin 40 for engaging with the swivel arm 14 is provided at the upper end of the movable reflecting mirror 13 so as to project upward, the same as above. It can be rotated. Further, the reflection angle adjusting mechanism 41 is screwed to an insertion hole 43 formed through a rising portion 42 bent in a crank shape on the lower surface of the mounting frame 11 and a rising portion 44 bent to a desired portion of the reflector 1. The adjusting screw 22 is screwed between the screw holes 45. When the adjusting screw 22 is rotated, the reflection angle adjusting mechanism 41 causes the adjusting screw 22 to tilt the protrusion 42, which has the movable reflecting mirror 13 axially provided by the retaining washer 46, in the directions of arrows I and J. Can be changed to adjust the reflection angle of the movable reflecting mirror 13. As shown in FIG. 15, the upper part of the movable reflecting mirror 13 is supported by a ball joint 47, whereby the movable reflecting mirror 13 is rotated and the reflection angle is tilted by the reflection angle adjusting mechanism 41. Fine adjustment is possible with operation.

FIG. 16 shows a modification of the method of constructing the rotary shaft with respect to the movable reflecting mirror. In the above description of the embodiment, the rotating shaft is fixedly provided so as to penetrate from the upper part to the lower part of the movable reflecting mirror 13, but the mounting frame 34 is attached to the bearing 48 recessed in the lower part of the movable reflecting mirror 13. A pin 49 projecting upward from the lower surface 34b is rotatably provided axially, and a bearing 49 is also provided as a recess in the upper part of the movable reflecting mirror 13 so that the pin 49 is fixed to one end of the rotary shaft 35. The pin 50 may be protruded between the plates 32 toward the movable reflecting mirror 13, and the movable reflecting mirror 13 may be sandwiched and fixed from above and below.

[0022]

[Effect of device]

 Since the movable reflector driving mechanism in the variable light distribution headlamp according to the present invention is configured as described above, it can be moved from the reflector opening side of the movable reflector driving mechanism in the variable light distribution headlight. The structure for assembling the reflecting mirror drive mechanism unit can improve the workability of assembling the unitized movable reflecting mirror drive mechanism to the headlight, and at the same time assembling the reflecting error of the movable reflecting mirror. Of course, even after the assembly is completed, the error can be easily corrected.

In addition, since the movable reflecting mirror drive mechanism unit is assembled to the headlight, it becomes easy to attach the reflection angle adjusting mechanism to the movable reflecting mirror drive mechanism unit. It has features such that the reflection angle of the mirror can be finely adjusted to eliminate glare from the reflected light flux and the safety of vehicle operation can be improved. The practical effect after implementing the present invention is extremely large.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an overall configuration of a movable reflecting mirror drive mechanism in a light distribution variable type headlight according to a first embodiment of the present invention.

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

FIG. 3 is a perspective view showing a state in which a movable reflecting mirror drive mechanism unit is assembled to the reflector.

FIG. 4 is a vertical sectional view of the same.

FIG. 5 is a perspective view showing a modified example of the movable reflecting mirror drive mechanism unit.

FIG. 6 is a cross-sectional view showing another modified example of the movable reflecting mirror drive mechanism unit.

FIG. 7 is an enlarged perspective view showing a supporting portion of a movable reflecting mirror.

FIG. 8 is an enlarged perspective view showing another structure of the movable reflecting mirror.

FIG. 9 is an enlarged perspective view showing another structure of the movable reflecting mirror.

FIG. 10 is a perspective view showing a state in which a movable reflecting mirror drive mechanism unit is assembled to a reflector according to a second embodiment of the present invention.

FIG. 11 is an exploded perspective view showing the movable reflecting mirror drive mechanism unit.

FIG. 12 is a perspective view showing a modified example of a method of configuring a rotary shaft with respect to a movable reflecting mirror.

FIG. 13 is a perspective view showing a modified example regarding a method of configuring a rotary shaft with respect to a movable reflecting mirror.

FIG. 14 is a cross-sectional view showing a modified example of a method of configuring a rotary shaft with respect to a movable reflecting mirror.

FIG. 15 is a cross-sectional view showing another modified example of the method of configuring the rotating shaft with respect to the movable reflecting mirror.

FIG. 16 is an exploded perspective view showing a modified example of the movable reflecting mirror drive mechanism unit.

FIG. 17 is a sectional view showing a movable reflecting mirror driving mechanism in a conventional light distribution variable headlamp.

FIG. 18 is an enlarged cross-sectional view showing a driving mechanism of a movable reflecting mirror of a conventional variable light distribution type headlight.

[Explanation of symbols]

 1 Reflector 2 Front Lens 3 Bulb 5 Upper Main Reflecting Mirror Surface 6 Lower Main Reflecting Mirror Surface 7 Sub-Reflecting Mirror Surface 8 Movable Reflecting Mirror Drive Mechanism Unit 10 Lamp Room 13 Movable Reflecting Mirror 14 Swing Arm 15 Coupling Rod 16 Driver 17 Reflection Angle Adjusting Mechanism

Claims (2)

[Scope of utility model registration request] 1. A headlamp in which a lighting chamber is provided by providing a lighting bulb at the bottom of a reflector whose opening surface is covered by a front lens, wherein a beam is deflected to a partly reflected light flux path from a reflector surface of the reflector. While supporting the movable reflecting mirror of
A movable reflecting mirror drive mechanism unit for rotatably displacing the movable reflecting mirror to deflect the irradiation direction of the partial light flux is constituted, and the movable reflecting mirror drive mechanism unit is assembled to the reflector from the opening side thereof, A movable reflecting mirror driving mechanism in a variable light distribution headlight, wherein a reflecting angle adjusting mechanism for adjusting a reflecting angle of the movable reflecting mirror is attached to the movable reflecting mirror driving mechanism unit. 2. The movable reflecting mirror drive mechanism unit comprises a reflection angle adjusting mechanism on a mounting substrate that rotatably supports a rotating shaft fixed to at least an upper edge or a lower edge of the movable reflecting mirror. The movable reflector driving mechanism in the variable light distribution type headlight according to claim 1.