Abstract:
The invention concerns a light having a reflector, at least one neon lamp, and a cover plate, wherein the light is provided with a shield for shielding the direct light of the neon lamp travelling towards the cover plate.

Description:
This application claims Paris Convention priority from DE 199 02 629.7 filed Jan. 23, 1999 the complete disclosure of which is hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     The invention concerns a light for a vehicle having a reflector, at least one neon lamp and a cover plate. 
     DE 94 13 286 U1 describes an auxiliary brake light for an automobile which is disposed on the inside rear shelf of the vehicle and is directed towards the rear window. A curved fluorescent tube can be disposed within the lighting housing. Although fluorescent tubes can effect a very high light yield, the neon lamp is visible as a bright stripe and the light intensity decreases rapidly with distance. In addition, the connector elements must be covered with additional components. Another disadvantage is that, for insertion or exchange of the fluorescent tubes, either the cover plate has to be removed or the entire lamp must be dismounted. 
     WO-A-98 12 471 describes a rear light in which a plurality of fluorescent tubes are disposed in front of the reflector. 
     SUMMARY OF THE INVENTION 
     Departing from DE 94 13 286 U1 it is the underlying purpose of the invention to provide a light in which a neon lamp can be easily inserted and with which the neon lamp can be exchanged in a simple fashion. 
     This purpose is achieved in accordance with the invention with a light of the above mentioned kind in that the reflector is provided with a shield for the direct light travelling towards the cover plate. 
     This shield prevents the neon lamp from being visible through the cover plate as a bright stripe. In addition, this shield prevents the neon lamp from blinding other drivers and passengers due to its high light intensity and associated light density. The illumination and the overall lighting effect is thereby improved. Possible lights include rear lights, brake lights, blinkers, backup lights etc. 
     A preferred improvement provides that the neon lamp can be inserted into the reflector from the backside thereof. The reflector has an opening having a shape adapted to that of the neon light through which the neon light can be completely or partially inserted into the reflector from the rear, i.e. from the backside. This has the substantial advantage that the cover plate must not be detached from the reflector in order to insert or exchange the neon lamp and the cover plate can even be permanently mounted to the reflector. An additional advantage of the light in accordance with the invention, is that the neon lamp can be easily attached to the reflector from inside the vehicle and even optionally without the use of tools. In another embodiment, the neon lamp can be inserted from the front. 
     A further improvement provides that the shield is configured to reflect light at the side facing the neon lamp, in particular, to deflect the light towards the reflector. The light directly incident from the neon lamp onto the shield is deflected by the shield, in particular by its reflector, towards the main reflector of the lamp so that this light can be utilized and is not destroyed behind the cover. 
     In accordance with the invention, the shield is connected to the reflector via one or a plurality of braces. The braces have the advantage that the large length of the neon lamp is associated with nearly no shadowing. 
     The shield is advantageously formed on the reflector and is preferentially integral therewith. In this fashion, the shield and the reflector can be simultaneously evaporation coated and must not be subsequently processed further. The integral configuration has the additional advantage that the shield is exactly positioned in or on the reflector. 
     In an embodiment of the invention, the shield is partially permeable to light so that a black stripe is not produced in the cover. The partial optical permeability of the shield can thereby be selected in such a fashion that the intensity of the light passing through the shield is as large as the intensity of the light reflected from the reflector. 
     An improvement provides that the shield has a surface structure on the side facing away from the neon lamp and/or is tinted. This facilitates optical or design effects. 
     In an additional embodiment, the reflector has a corrugated or stepped reflector surface. Instead of a parabolic shape, the corrugated reflector can reflect the light towards the cover plate in dependence on the configuration of the corrugations. This can also be achieved using a stepped reflector surface. 
     The back side of the reflector preferentially has holding elements and or plug contacts for the neon lamp. The plug contacts for the neon lamp are thereby covered so that no additional covering is necessary. The holding elements can be used to precisely position and mount the tubes of the neon lamp. The tubes can e.g. directly seat on the holding elements. 
     Further advantages, details and features of the invention can be extracted from the dependent claims as well as from the following description in which particularly preferred embodiments are described in detail with reference to the drawing. The features disclosed in the description and the claims and shown in the drawing can be important to the invention individually or collectively in arbitrary combination. 
    
    
     BRIEF DESCRIPTION OF THE DRAWING 
     FIG. 1 shows a plan view of a reflector having a schematically indicated neon lamp; 
     FIG. 2 shows a cut through the reflector II—II in accordance with FIG. 1; 
     FIG. 3 shows a cut III—III through the reflector in accordance with FIG. 1, showing plug contacts; 
     FIG. 4 shows a cross section through a first embodiment of a rear light; 
     FIG. 5 shows a cross section through a second embodiment of a rear light; and 
     FIG. 6 shows a cross section through a third embodiment of a rear light. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The embodiment FIG. 1 shows a reflector, indicated in its entirety with  1 , comprising two reflector shells  2  and  3 . The reflector shell  2  is shown in an enlarged representation in FIG.  2 . As can be seen in FIG. 2, both reflector shells  2  and  3  are curved with a parabolic shape so that the light from a neon lamp  4  is deflected into substantially parallel beams  5  (FIG.  2 ). The neon lamp  4  has two connector elements  6  and  7  and comprises a curved section  8 . The reflector  1  comprises covers  9  through  12  proximate the connector elements  6  and  7  as well as in the region of the curved section  8  which cover the connector elements  6  and  7  and the curved section  8 . 
     A shield  13  and  14  extends between each of the covers  9  and  11  as well as  10  and  12 . Linear sections  15  and  16  of the neon lamp  4  are covered by the shields  13  and  14  in a direction of a cover plate (not shown). This prevents the neon lamp  4  light from being directly incident on the cover plate. In addition, the neon lamp  4  cannot be seen from the outside, i.e. through the cover plate. The shields  13  and  14  are connected to the reflector shells  2  via narrow braces  17 . The width of the braces  17  is selected in such a fashion that only negligible regions of the linear section  15  and  16  of the neon lamp  4  are covered. The braces  17  also firmly connect the shields  13  and  14  are to the reflector shells  2  and  3  so that they can be handled together therewith. 
     Output openings are located between the shield  13  and the reflector shell  2  as well as between pairs of braces  17  through which the light from the neon lamp  4  can escape to be incident on the reflector surface  18  where it is deflected into substantially parallel beams  4 . The light incident on the side of the shield  13  facing the neon lamp  4  is deflected by a second reflector  19  so that this light likewise passes through the openings and can be used. Towards this end, this reflector  19  has a light deflecting geometry. 
     As can also be seen in FIG. 2, the braces  17  seat on the surface of the neon lamp  4  to thereby hold the neon lamp  4  in a defined position. 
     FIG. 3 shows the two reflector shells  2  and  3  in a sectional representation. The two covers  9  and  11  cover the two connector elements  6  and  7  of the neon lamp  4 . 
     FIG. 4 shows a section of a first embodiment of the invention in accordance with FIGS. 2 and 3. One can clearly see that the rear side of the reflector  1  is accessible after removal of a cover shell  20  from the rear light  24 . Light bulbs  21  and  22  as well as elements  23  for power supply are disposed on the cover shell  20 . The back side is covered by a cap having an integral fluorescent lamp ballast  26 . After the cap  25  is removed, the neon lamp  4  is freely accessible and can be inserted into and removed from the back side of the reflector  1 . Exchange of the neon lamp  1  is thereby simple and straight forward. 
     FIG. 5 shows a second embodiment with an additional recepticle  27 , provided between the two reflector shells  2  and  3 , for a linear section of a neon lamp  4 . FIG. 6 finally shows a third embodiment with which the reflector  1  has a corrugated reflector surface  18 , wherein the corrugated contours are configured in such a fashion that they deflect the light incident thereon towards the cover plate  28  in substantially parallel beams  5 . This allows individual design goals to be taken into consideration. 
     In any event and in all embodiments, the neon lamp  4  is covered by shields  13  and  14  so that the radiation from the neon lamp  4  is not directly incident on the cover plate  28 .