DE10147584B4 - Lighting device for motor vehicles - Google Patents

Abstract

Lighting device for motor vehicles with arranged on openable flaps lights (4), characterized in that when opening a corresponding flap (2) at least the lighting means (5) with high heat output for the duration of the open position automatically reduced in power, in particular be switched off, said the lights (4) are reversing lights, rear running lights and / or rear fog lights.

Description

The invention relates to a lighting device for motor vehicles with lights arranged on openable flaps, according to the preamble of claim 1.

Lighting equipment on vehicles are generally required by law. On the one hand, lights are provided for illuminating the roadway, so-called headlights, and in the rear end of the motor vehicle, signal lights are essentially arranged for orientation of the following traffic. In addition, special lights, such as turn signals and reversing lights are also provided. An optimal and functional illumination of the track and optimally placed signal lights are not only aimed at design aspects, but they must be functional in the first place. Regarding advantageous functionalities of the illumination device on motor vehicles, multiple examples are known in the prior art.

From the DE 29 03 547 A1 is a motor vehicle with arranged at the rear door or flap known which is pivotable about an axis arranged transversely to the vehicle longitudinal axis, wherein the upper side of the taillights in the closed position un in the open position of the door or flap are aligned substantially vertically. This ensures that the arranged in the trunk lid lights are still visible in all positions of the boot lid.

In the DE 299 17 921 U1 discloses a vehicle door having a lighting arrangement in the region of the door handle. The lighting arrangement is arranged so that it illuminates the immediate area of the door handle in the on state to avoid damage when unlocking the door.

So is out of the DE 35 03 451 C2 a lighting control for vehicles, wherein the lighting is controlled or controlled in dependence on the external light conditions. In this way, one tries to the motor vehicle driver to take the recurring decision for when it would be necessary to turn on the exterior lighting.

From the G 93 14 710.4 is an automatic switching on and off of the motor vehicle lights in response to the external light conditions in conjunction with the status of the ignition actuation known. In this case, it is additionally taken into account that the exterior lighting on the motor vehicle is of course automatically switched on only when the ignition is switched on.

From the G 90 07 426.2 a safety device is known which keeps the door lighting still off, as long as the door opening is not opened beyond a certain opening angle. Objective of such a lighting control, but in this case does not affect the outdoor lighting, but the door lighting with the door open, it is to avoid that the door lighting is already turned on when the door is open only a gap. In the case of single gap-wide opening of the door, the door lighting is otherwise already switched on, although the said light is still relatively close to an interior trim part or a body part on the motor vehicle in this opening state. In this case, overheating may occur, which should be prevented with a safety device of this type.

From the EP 0 256 399 B1 is a rear door for motor vehicles with integrated tail lights known. In this example, rear lights are therefore not only arranged only on the fixed outer lining, so the vehicle body, but the entire rear light assembly or tail light strip extends at least partially on the hatch or rear door elements of the boot cover or tailgate. This document specifies a special ventilation of the rear lights.

From the US 44 20 797 a luminaire assembly for motor vehicles is known, with bulbs below the tailgate and reflectors within the tailgate. Only when the rear door is closed do the illuminants arranged below the rear door, for example in the bumper area, optically correspond to the reflectors arranged in the rear door. That is, the entire tail lamp is thus subdivided into an area in which the bulbs are arranged, but which is arranged below the rear door, wherein the actual light assembly with light emitting surface and arranged therein reflector is arranged in the rear door. Optically, when the rear door is closed, the illuminants correspond with the luminaires via openings, so that the light from the illuminants can fall into the reflectors. In this way, it is achieved that in the movable tailgate, although the lamp is arranged for the viewer for the outside, but the light source is arranged concealed, for example, in the underlying bumper, so that no cable must be laid within the tailgate.

From the EP 0 635 416 B1 only one design placement of a lighting group is indicated on the tailgate of a vehicle, the lighting group is placed so that the interface between the outside and Interior trim of the body is covered by the lighting group.

For lights that are located within the tailgate or the boot cover, the problem arises that not only cable must be integrated into the tailgate or trunk lid schwenkelastisch, but that when the vehicle is ready, and with the lights on and simultaneous opening of this tailgate at still switched on vehicle, the position of the lamp is pivoted as such in space almost 90 °, and thereby result in other thermal distribution ratios in the switched-lamp.

This is not reflected in any of the aforementioned prior art documents.

The DE 100 11 988 C1 shows the arrangement of a license plate with a switchable license plate lighting in the trunk area. The activation / deactivation of the license plate illumination takes place together with the state, dimming, and / or high beam of the vehicle. In addition, the license plate light is switched as a function of unlocking / locking the luggage compartment. It is turned on when unlocking the trunk lock, to illuminate the environment of the trunk, and turned off when locking the trunk lock. However, when the trunk lid is open, the license plate light can dazzle the user. For this reason, the license plate light is already turned off when you open the boot lid. The invention is therefore the object of developing a lighting device of the generic type to the effect that in the open state of the tailgate or the tailgate or trunk lid and simultaneously switched lights, overheating be avoided.

The object is achieved according to the invention in a lighting device of the generic type by the characterizing features of claim 1.

Further advantageous embodiments of the illumination device according to the invention are specified in the dependent claims.

The essence of the invention consists in the fact that when you open a corresponding flap, at least the bulbs with high heat output, especially for the duration of the open position, are automatically switched off. This now also takes into account the case that the vehicle is turned on, also switched on the lights and in the state of the vehicle once again the tailgate or tailgate or trunk lid is operated or must be. The shutdown can be done immediately or after a predefined period of time after the opening. It is also conceivable to regulate the switching off of the lighting means after the opening as a function of the resulting heat output.

The invention makes use of the following knowledge. Lights in the rear part area have a more or less rectangular cross-section. On one of the long sides of the rectangular cross-sectional contour is the light-emitting surface, which should be optimally large and is therefore placed on one of the long sides of this rectangular contour. The narrow sides of the rectangular contour reflect the depth of the lamp housing, the depth of the lamp housing should be optimally minimal, so as not to have to stand so far over the body, and thus should allow optimal compact installation with low installation depth , At the light-emitting surface opposite long side of this rectangular contour, the light source is arranged. As a rule, in tail lights with high luminous power, such as in reversing lights or tail lights in general, this is an incandescent lamp that generates not only the light emission but also from emission of thermal energy. As is known, the heat produced by this incandescent lamp rises to the top, so along the narrow sides of the rectangular contour results in a relatively long flow path, wherein at suitable points the light, d. H. the lamp body or the lamp housing may contain ventilation slots.

Will the hatchback or boot cover, d. H. the trunk lid open, so the entire lamp assembly, which is arranged thereon, pivoted by about 90 °. Of course, this does not change the geometric conditions within the luminaire. But this does change the thermal flow paths relative to the luminaire housing. If, in fact, the tailgate is pivoted upwards, the heat generated by the luminous means continues to rise largely vertically upwards, whereby only one depth, corresponding to the narrow sides of the rectangular contour, results as the flow path. Since this is the outer surface, and thus the surface to be protected against dirt and water, against which the flow arrives with only a short flow path, is not providable with slots, thus resulting in overheating, which in the past either damage, deformation or even have led small Schmorbränden within the lights.

In the illustrated illumination device according to the invention now at least the light source is automatically switched off with high heat output for the duration of the open position of the rear door or the flap. This is the result Heat generation abruptly stopped and thus avoiding overheating.

In an advantageous embodiment, the illumination device according to the invention is used in lights in the tail light area.

In a further advantageous embodiment, it is stated that the flap is an upwardly hinged tailgate or a boot lid, as already shown above.

Furthermore, it is advantageously designed that the lights are integrated into the tailgate or trunk lid on the outside, making for a large rear door areas with low sill constructive feasible and at the same time enough space remains to place large, signal technically yielding taillights.

In a further advantageous embodiment it is indicated that the automatically switchable lights are the reversing lights. These generally generate a high proportion of heat, since they are equipped with powerful light sources.

In a further advantageous embodiment, it is stated that the said automatically switchable lights are the tail lights of the tail lamp section. These are switched on when the vehicle is already operational with the outside lighting switched on, even while stationary.

Another lamp with higher luminous efficiency and thus a higher thermal development of the corresponding lamp is the rear fog lamp, which should be automatically switched off in the same way in the case where it is integrated in the lid or said flap.

In a further advantageous embodiment, it is indicated that the lights that are automatically switched off in this way, in this way temporarily switched off and after closing the flap are also automatically switched on again.

Furthermore, as already stated above, rear lamp assemblies are known which are partially integrated in the fixed rear body portion and partially extend into the trunk lid or the rear door. For this case, it is advantageous that in a tail light assembly of this kind, at least that part of the tail lamp assembly, which is arranged on the flap, for the duration of the open position, is automatically switched off. The remaining fixed lights of the rear lamp assembly, because they are not arranged on the movable flap and thus not spatially pivoted and consequently also the thermal conditions within the lamp do not change, they can of course remain switched on unchanged at the open position. Switching off and on again affects only the arranged on the tailgate or on the boot lid tail lamp elements.

The invention is illustrated in the drawing and described in more detail below.

It shows:

1 : Rear end of a motor vehicle with a tailgate.

2 : Rear end of a motor vehicle with trunk lid in closed and open position.

1 shows in a simple, schematic representation of the rear end of a motor vehicle 1 , The tailgate 2 is configured in the external contouring shown here and extends in the lower area far down, so that a low loading edge, which is considerably advantageous when loading and unloading of the motor vehicle results. Since the remaining points on the fixed body part are only small areas, a generous arrangement of a tail light assembly with large light emitting surfaces would not be possible. For this reason, this is the tail lamp section divided into a tail lamp section 3 standing on the fixed body of the motor vehicle 1 is arranged, and a second taillight section 4 inside the hatchback 2 is arranged.

The tailgate shown here 2 However, it may also be a trunk lid on which a divided in this way in two lots tail light assembly is arranged in the same way. Even with a normal trunk lid of a sedan configuration of the motor vehicle, the placement of another tail lamp section can also be provided on the trunk lid. Will now the tailgate or the boot lid 2 open, so of course remains the tail light section 2 on the fixed body spatially unchanged, while the second tail light lot 4 together with the tailgate or the boot lid 2 is pivoted upwards. This changes the spatial position of the rear lights, and the thermal flow conditions within the tail light section 4 changes dramatically compared to the fixed in the rear lights or tail lights 3 , In accordance with the invention, the bill is taken to avoid overheating either in the second tail light lot 4 arranged hottest light sources or the entire tail light lot 4 for the duration of the opening position of the tailgate 2 or the trunk lid automatically after a predefined period of time, for example, 10 minutes, off and turned on again when closing. For this purpose, simple, not shown here elements to apply, such as closing contactor or position sensor for the opening position of the rear door, which are operated anywhere in the opening or closing of the tailgate or the tailgate under mechanical engagement of the rear door position, and switching on and off automatically and dependent effect from the open position, as is also applied to the door lighting or the interior lighting when the vehicle door is open.

2 shows in two picture elements 2a and 2 B two basic positions of a boot lid 2 , wherein the rear end of a motor vehicle 1 only partially shown. 2a shows a closed trunk lid 2 in which a tail light section 4 is arranged integrated. The detail circle around the section of the boot lid 2 around the taillight section 4 around is shown again in detail and enlarged enlarged: Here again the above-described thermal and geometric situation of a tail light is stylized. The light-emitting outer surface is one of the long sides of the rectangular contour, which results here, the rectangular contour is upright, ie with the trunk lid closed. On the opposite side of the light-emitting surface is the bulb 5 arranged, which is in this case a Glühluchtmittel and thus produces heat. This heat can rise along the long sides or at least half the height of the long sides within the tail light 4 and be discharged for example at the rear, the spray water area facing away from the top through vents. Ventilation slots on the light-emitting surface are not advisable, since moisture can penetrate and permanently pollute and even destroy the illumination device.

In the lower part of the picture 2 becomes the condition of an open trunk lid 2 with integrated tail lamp section 4 shown. In this open position is now also the tail lamp section 4 rotated or pivoted by about 90 ° in the room. In the detail circle, this means that the tail light section 4 off the detail circle 2a now arranged rotated by 90 °. Unchanged remains to that of the light source 5 produced heat in turn rises almost vertically upward, but now only a flow path corresponding to the half-depth, if necessary, so half the narrow side of the rectangular contour has. Here it is already easy to see that the flow path is relatively short and the so flowed with hot air outer surface or outside long side of the tail lamp section 4 Of course, for the reasons mentioned above can have no ventilation slots, as would penetrate through this moisture. Consequently arises here a heat accumulation in the open state of the boot lid 2 when the tail lamp is on.

For this reason, in the open position, said rear lights part 4 or the lamps arranged therein, at least those with high power off for the duration of the open position of the tailgate or the trunk lid of the motor vehicle.

Claims (7)

Lighting device for motor vehicles with luminaires arranged on openable flaps ( 4 ), characterized in that when opening a corresponding flap ( 2 ) at least the bulbs ( 5 ) are automatically reduced in their power with high heat output for the duration of the open position, in particular be switched off, the lights ( 4 ) Reversing lights, rear running lights and / or rear fog lights are. Lighting device according to claim 1, characterized in that the lighting means ( 5 ) when opening the flap ( 2 ) and expiration of a predefined period of time are automatically switched off. Lighting device according to claim 1 or 2, characterized in that the shutdown of the lighting means ( 5 ) after the opening of the flap ( 2 ) takes place as a function of the resulting heat output. Lighting device according to claim 3, characterized in that the flap ( 2 ) an upwardly hinged tailgate or a boot lid ( 2 ). Lighting device according to claim 4, characterized in that the lights ( 4 ) in the tailgate or the boot lid ( 2 ) are integrated on the outside. Lighting device according to one of the preceding claims, characterized in that all the lights ( 4 ) so temporarily off and after closing the flap ( 2 ) are automatically switched on. Lighting device according to one of the preceding claims, characterized in that all the lights ( 4 ) temporarily off and after closing the tail lamp section ( 4 ) on or in the tailgate or boot lid ( 2 ) is arranged another tail lamp lot ( 3 ) is arranged on or in the outer body, at least the first-mentioned tail lamp lot ( 4 ) of the tail lamp assembly for the duration of the open position is automatically switched off.

Images