JP4690526B2 - Headlights for cars - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a headlamp for an automobile, which is provided with a reflecting mirror, a light source is arranged at the apex region of the reflecting mirror, and further a shade device capable of turning is provided, When the shade device is in the position for the high beam, the light from the light source reaches the first reflector area or is emitted from the first reflector area, and in the position for the low beam. The invention relates to a type that shields light transmitted from a light source to the first reflecting mirror region or light reflected by the reflecting mirror region.
[0002]
[Prior art]
Such a headlamp is known, for example, from German Offenlegungsschrift 4002576. In one embodiment of such a headlamp, the shade device has a cap, which can be pivoted about a horizontal axis arranged perpendicular to the optical axis of the reflector. It is. This swiveling is performed by a rod-shaped adjusting element that penetrates the reflector. A cap is pivotally supported on the adjusting element.
[0003]
In another embodiment based on this German patent application DE 4002576, the shade device is formed by a light-impermeable shade, which is horizontally oriented perpendicular to the optical axis. , And can be pivoted about an axis disposed at the lower edge of the reflecting mirror. In practice, such turning is performed by an adjustment motor, for example. The driving force of the adjusting motor is transmitted to the shade through a mechanical element.
[0004]
In many cases, the mechanical transmission mechanism is prone to failure and cannot sufficiently enable a very quick switch between low beam and high beam functions.
[0005]
[Problems to be solved by the invention]
The object of the present invention is to improve a headlamp for a motor vehicle of the type mentioned at the outset, which is technically simple and requires only as few parts as possible to achieve a rapid change between low and high beam functions. It is to provide a headlamp that makes switching possible.
[0006]
[Means for Solving the Problems]
In order to solve this problem, in the configuration of the present invention, the shade device is configured to be turnable by an electromagnetically controllable actuator disposed at the reflector edge.
[0007]
【The invention's effect】
By placing an electromagnetically controllable actuator at the lower edge of the reflector adjacent to the pivot axis of the shade device, the pivoting of such a shade device is the only one mechanically supported. Made possible by elements. In this way, the shade device can be operated very quickly, can be easily manufactured, and is less prone to failure.
[0008]
The pivotable shade device has a shade that can be returned to the position for the low beam by the return force of the return means, the shade being arranged on one side of the pivot axis and pivotable It is advantageous if the shade device has an operating element which is arranged on the other side of the pivot axis and can be operated by an actuator. In this way, the mechanical transmission element can be omitted completely. The conversion from the low beam function to the high beam function is performed by operating the actuator. As a result, the operating element and the shade coupled to the operating element are turned.
[0009]
It is advantageous if the pivot axis is arranged in a horizontal direction and perpendicular to the optical axis.
[0010]
In a particularly advantageous configuration in terms of luminous efficiency, the light source is a gas discharge lamp, and the pivot axis is arranged below the optical axis and in the focal plane area of the lens arranged in front of the reflector.
[0011]
The position for the low beam of the shade is defined by at least one rigid stop. In the case of a projection headlamp, this stopper can be bent slightly for color edge correction.
[0012]
In another advantageous configuration of the invention, the actuator is an electromagnet (reciprocating).
[0013]
In this case, the operation element is a magnet movable element.
[0014]
The magnet mover and shade are composed of different parts. Magnetic materials are used for the magnet mover.
[0015]
It is advantageous if the shade is arranged with a device (tourist solution) for switching the shape of the shade from right-hand traffic to left-hand traffic and vice versa, which device can be swiveled from the light path together with the shade It is. In this way, the headlamp can be easily switched for use in countries where left-hand traffic instead of right-hand traffic or vice versa is specified.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
In the following, embodiments of the present invention will be described in detail with reference to the drawings.
[0017]
The headlamp for a motor vehicle shown in FIG. 1 has a reflector 10. In this reflecting mirror, a gas discharge lamp 12 is inserted into an opening 11 provided in the apex region. The gas discharge lamp has an axial arc 13 during operation.
[0018]
A lens 20 is disposed after the reflecting mirror 10 in the light emitting direction 14. For example, the lens 20 is held by a support 15 coupled to the reflecting mirror 10.
[0019]
The light beam emitted from the gas discharge lamp 12 is shielded by the shade device 30. This shade device 30 is arranged behind the gas discharge lamp 12 in the light emission direction 14. The shade device has a shade 32. The shade 32 shields the lower region of the reflecting mirror 10 at the low beam position (indicated by a solid line). The shade 32 is supported by a support location 47 so as to be capable of turning via a turning shaft 33. A turning shaft 33 of the shade device 30 is disposed on the holder 34. The holder 34 is inserted into the guide 48 by the reflecting mirror 10. This guide is located below the reflecting mirror 10. The pivot 33 is disposed slightly below the lower edge of the reflector. The shade device 30 is disposed substantially in the plane of the front edge portion of the reflecting mirror 10. The low beam position of the shade 32 is disposed substantially perpendicular to the optical axis 50 of the headlamp. In this case, since the light portion that has exited the gas discharge lamp 12 and is reflected by the lower portion of the reflecting mirror 10 is shielded, only the light reflected by the upper portion of the reflecting mirror 10 may be emitted from the headlamp. it can.
[0020]
In the high beam position (shown by a broken line in FIG. 1), the shade 32 forms an angle α and turns around the turning shaft 33 toward the light emission direction 14 in a direction away from the gas discharge lamp 12. Therefore, the light reflected by the lower part of the reflecting mirror 10 can also be emitted from the headlamp.
[0021]
The swivel angle α is particularly related to the shape of the reflecting mirror, the refractive power and arrangement of the lens 20 in front of the reflecting mirror 10, and the gas discharge lamp 12. The swivel angle α can be, for example, about 40 ° to 50 °, preferably about 45 °.
[0022]
The turning of the shade 32 is performed by an electromagnet 40 formed as an actuator. A magnet mover 45 is coupled to the shade 32. The magnet mover is attracted at the high beam position of the shade 32 and abuts against the magnetic pole core (shown by a broken line in FIG. 1).
[0023]
The magnet movable element 45 and the shade 32 are coupled to each other so as to be movable, for example, via a connecting member 46. This connecting member compensates for a spatial shift, in particular, a vertical shift between the shade 32 and the magnet movable element 45. As shown in FIGS. 1, 4 and 5, the connecting member 46 may be formed as a wire spring bent into a U shape or a Z shape. The wire spring is rotatably supported by the magnet movable element 45 and the shade 32. Optionally, the connecting member 46 may be formed as a lateral pin. This lateral pin is inserted in the magnet movable element 45 and engages in the hole of the shade 32. For the magnet movable element 45, a material suitable for generating a sufficiently high magnetic force is used.
[0024]
The shade 32 is held in its low beam position by return means in the form of a return spring 49, so that the low beam position is the starting position. As is clear from FIG. 1 in particular, the magnet mover 45 is not attracted by the electromagnet 40 at the low beam position of the shade 32 (shown by a solid line in FIG. 1). Thus, it is ensured that the headlamp is switched to the low beam position when the electromagnet 40 fails or when the current of the electromagnet 40 is lost. The swivel shaft 33 is disposed in the lower region of the reflecting mirror 10 at right angles to the optical axis 50 and at least substantially in the horizontal direction.
[0025]
When the electromagnet 40 is supplied with power, the magnet movable element 45 is attracted by the electromagnet 40, so that the shade 32 is turned to its high beam position.
[0026]
The low beam position of the shade 32 is defined by a stopper (not shown). The shade comes into contact with this stopper. As shown in FIG. 7, this stopper may be formed on a thin plate portion 51 that is screwed to the reflecting mirror 10. This thin plate portion 51 can be bent to allow fine adjustment of the low beam position of the shade 32. Fine adjustment of the low beam position of the thin plate 32 is necessary, for example, in order to be able to remove or minimize the low beam Farbsaeume emitted from the headlamp.
[0027]
As shown in FIG. 6, the stopper may be selectively formed as an adjusting screw 52 screwed into the front edge of the reflecting mirror 10. By rotating the adjusting screw 52, the low beam position of the shade 32 can be adjusted. When the low beam position of the shade 32 is set correctly, the adjustment screw 52 can be prevented from rotating.
[0028]
In another embodiment (not shown), the shade device and the electromagnet 40 are arranged as a group on the support plate. The support plate is slidable along the optical axis for color edge correction. Such sliding is performed by, for example, a guide (not shown) disposed on the reflecting mirror 10. After color edge correction is performed, the entire component group is locked or held by tightening with a spring.
[0029]
The shade 32 has an upper edge. This upper edge creates a light / dark boundary of the low beam emitted from the headlamp at the low beam position.
[0030]
The upper edge of the shade 32 has a horizontal section 54 on one side of the optical axis 50, and a downward gradient section 56 starting from the horizontal section 54 on the other side of the optical axis 50. Have. Thereby, an asymmetrical light / dark boundary is generated by the shade 32. This light / dark boundary has a horizontal section generated by the section 54 of the shade 32 on the opposite lane side, and is based on the image formed by the lens 20 generated by the section 56 of the shade 32 on the own lane side. It has an up-gradient section.
[0031]
The shade 32 is provided with another shade element 58 that can pivot. The shade element 58 has a claw 63 that protrudes beyond the shade 32 toward the outside. The adjustment lever 64 supported by the support body 61 acts on the claw 63.
[0032]
The shade element 58 is supported by the shade 32 so as to be pivotable about an axis extending at least substantially parallel to the optical axis 50. In its starting position, the shade element 58 is arranged such that the upper edge 60 of the shade element is located below the inclined section 56 of the shade 32. In such a starting position, the shade element 58 has no effect on the light / dark boundary of the low beam emerging from the headlamp. The shade element 58 is held in the starting position by a spring 62, for example in the form of an Omegafeder. By pivoting, the shade element 58 is movable to the operating position. In this operating position, the upper edge 60 of the shade element is arranged in a substantially horizontal direction and is thus located higher than the inclined section 56 of the shade 32. With the shade element in its operating position, the low beam emitted from the headlamp has a consistent horizontal light / dark boundary. The shade element 58 allows the headlamp to be used without being dazzled on the oncoming vehicle side even in a traffic mode different from the original traffic mode adapted when the shade 32 of the headlamp is configured, that is, in a right-hand traffic or a left-hand traffic. Can be used temporarily.
[0033]
Such a so-called tourist solution formed by the shade element 58 is particularly advantageous if it is swiveled together with the shade 32.
[Brief description of the drawings]
FIG. 1 is a vertical center sectional view showing an embodiment of a headlamp according to the present invention, taken along line II in FIG.
2 is a diagram showing a state in which the headlamp of FIG. 1 is viewed in the direction of an arrow II in FIG.
FIG. 3 is a cross-sectional view of the headlamp shown along the line III-III in FIG.
4 is a cross-sectional view of the headlamp shown along line IV-IV in FIG.
FIG. 5 is a view showing a connecting member.
FIG. 6 is a cross-sectional view partially showing a headlamp in which a shade stopper is formed as an adjustment screw.
7 is a cross-sectional view partially showing the headlamp along the line VII-VII in FIG. 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Reflector, 11 Aperture, 12 Gas discharge lamp, 13 Arc, 14 Light emission direction, 15 Support body, 20 Lens, 30 Shade apparatus, 32 Shade, 33 Rotating shaft, 34 Holder, 40 Electromagnet, 45 Magnet mover, 46 Connecting member, 47 bearing location, 48 guide, 49 return spring, 50 optical axis, 51 thin plate portion, 52 adjustment screw, 54, 56 section, 58 shade portion, 60 upper edge portion, 61 bearing body, 62 spring, 63 claw, 64 Adjustment lever

Claims (11)

A headlamp for an automobile, which is provided with a reflecting mirror (10), a light source (12) is arranged in the apex region of the reflecting mirror, and further a shade device (32 ) capable of turning When the shade device is in a position for a high beam, the light from the light source (12) reaches the first reflector region or is emitted from the first reflector region. and which, in the position for low beam, the light source (12) is adapted to shield the light that is to be reflected by the light or the reflector region were sent to the first reflector region from shade device ( 3 2) are arranged in the reflector edge is pivotable by electromagnetically controllable actuator, the position of at least one stop for the low beam shade device (32) (51; 52) Are defined I, the stopper; in of the type shade device (51 52) (32) abuts,
Headlamp for a motor vehicle, characterized in that the position of the at least one stopper (51; 52) is adjustable . Headlamp according to claim 1, wherein the stopper (51) is permanently deformable for adjustment of the stopper. 2. The headlamp as claimed in claim 1, wherein the stopper is formed by an adjustment screw (52), the adjustment screw being rotatable during the adjustment. The swivelable shade device (32, 45) has a shade (32) that can be returned to the position for the low beam by the return force of the return means (49), which shade is the swivel axis (33). ) And a pivotable shade (32) has an operating element (45) arranged on the other side of the pivot axis (33) and operable by an actuator, The headlamp according to any one of claims 1 to 3. 5. The headlamp as claimed in claim 1, wherein the pivot axis is arranged in a horizontal direction and perpendicular to the optical axis (50). Headlamp according to any one of claims 1 to 5, wherein the light source is a gas discharge lamp (12) and the pivot axis (33) is arranged below the optical axis (50). The headlamp according to any one of claims 1 to 6, wherein the actuator is an electromagnet. 8. Headlamp according to claim 7, wherein the operating element forms a magnet mover (45) of an electromagnet (40). 9. The headlamp according to claim 8, wherein the shade (32) and the magnet mover (45) are movably coupled to each other. The shade (32) and the magnet movable element (45) are coupled to each other by a connecting member (46), and the spatial displacement between the shade (32) and the magnet movable element (45) is compensated by the connecting member. The headlamp according to claim 8 or 9, wherein the headlamp is adapted to be used. Arranged on the shade (32) is a device (58) (tourist solving means) for switching the shape of the shade from right-hand traffic to left-hand traffic and vice versa, which device together with the shade (32). The headlamp according to claim 1, wherein the headlamp is turnable from the optical path.

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