Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
  • F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
  • F21S43/19—Attachment of light sources or lamp holders
  • F21S43/195—Details of lamp holders, terminals or connectors
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F21—LIGHTING
  • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
  • F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
  • F21S45/40—Cooling of lighting devices
  • F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings

Definitions

• the present invention relates to a traffic light for a motor vehicle.
• the invention relates more particularly to a fire, in particular a rear light, of motor vehicles, comprising at least one lamp and an associated lamp holder, capable of evacuating the heat generated by the light source of the signaling light.
• Motor vehicles generally include traffic lights which, according to their function fog, recoil, flashing or lighting, include lamps of different powers, which are more or less important sources of heat.
• EP 1 718 127 proposes a front light producing heat to eliminate condensation in the headlight housing. This fire has different orifices for obtaining an air flow inside the housing so as to evacuate this heat. Such a housing provides a large interior volume to allow a large air flow between the orifices.
• traffic lights such as taillights
• taillights must be compact enough to fit into the vehicle structure and allow sufficient interior volume to provide a flow of air that can remove the heat produced by the vehicles. light sources.
• some solutions for limiting the accumulation of heat provide a hollow lamp holder forming a volume limiting the overheating of the lighting device at the bulb sockets by promoting the movement of air in the lamp holder.
• the object of the invention is to provide an improved traffic signal of a motor vehicle for better evacuation of the heat generated by the light sources despite the compactness of the fire necessary for its integration on the vehicle.
• the invention proposes a motor vehicle traffic light box comprising a lamp holder comprising a means for channeling the heat produced by the lamps outside the housing.
• the heat channeling means may be an open groove on the inner face of the lamp holder and extending vertically from a lower zone to an upper zone of the lamp holder.
• the lamp holder may comprise at least two sockets aligned along a vertical axis, and two grooves extending on either side of the sockets.
• a lower portion of the lamp holder may connect the grooves together, and may include an opening forming an air inlet to the interior of the housing.
• each groove can lead to the opening for the electrical connector of the traffic light.
• FIG. 1 is a vertical sectional view of a signal light box according to the invention.
• FIG. 2 is a view of the rear face of the lamp holder of the casing of FIG. 1;
• FIG. 3 is a sectional view along the axis III of the lamp holder of Figure 2.
• a lighting device 10 for a motor vehicle such as a rear traffic light
• This signal light 10 has different lamps 16a, 16b and 16c to provide for example the functions of recoil, flashing or braking.
• This traffic light 10 is in the form of a housing whose main part is a light reflector assembly 14 towards the outside of the vehicle comprising three reflectors 14a, 14b and 14c located one above the other on a vertical axis , and having a substantially parabolic shape open towards the outside of the vehicle and whose bottom has a passage for the associated lamp 16a, 16b or 16c.
• the light reflecting assembly 14 is made of plastic material and the front faces of the light reflectors 14a 14b and 14c, positioned on the lamp side towards the outside of the vehicle are covered with a light reflective coating.
• the two lower reflectors 14b and 14c each have an orifice 18 on their upper part. These orifices 18 open at the rear of the reflector assembly 14, thus allowing a heat transfer flow from the front to the rear of the reflector.
• the light reflector assembly 14 includes attachment sites 20 located on the peripheral edge of said reflector assembly. These attachment sites 20 make it possible to fix the housing on the structure 12 of the vehicle by means of screws for example.
• the rear part of the reflector assembly facing the structural element 12, has walls 26 substantially forming a parallelepiped volume, on which the support 22 of the lamps is fixed so as to obtain a closed volume.
• This support is also called lamp holder 22.
• the housing of the traffic light 10 is closed on the outside of the vehicle by a catadioptric window 24 polycarbonate for example.
• This window 24 is fixed to the periphery of the light reflector 14 for example by gluing, interlocking or any other means of assembly.
• the lamp holder 22 forms a lid which has three sockets 28a, 28b and 28c open on the front face of the lamp holder turned towards the inside of the signal light housing.
• the edges of the lamp holder 22 are held against the walls 26 by fastening means (not shown), for example clips or screws.
• the sockets 28a, 28b and 28c are arranged on the same vertical axis facing the three passages of the reflectors 14a, 14b and 14c.
• the lamp holder 22 comprises an electrical connection opening 30 which opens the rear face of the lamp holder 22 facing the bodywork 12 of the vehicle.
• the connection opening 30 is between the upper bushing 28a and the lower bushings 28b and 28c, the lower lamps 16b and 16c being the most important heat sources of the traffic light.
• This electrical connection 30 is electrically connected to the sockets 26 via an electrical circuit (not shown) positioned on the front face of the lamp holder 22.
• the lamp holder 22 has two grooves 32 open on its front face and extending vertically on each side of the two lower sockets 28b and 28c until the opening of the electrical connection.
• the lamp holder 22 also has an air inlet 34 in its lower part.
• This air inlet 34 consists of an opening in the shape of a circle, truncated in its lower part.
• the opening is surmounted by a cylindrical wall of which a portion located downward is not closed.
• a vertical wall perpendicular to the truncated portion of the opening joins the cylindrical wall.
• the height of this vertical wall is less than the height of the cylindrical wall.
• this opening is associated with a cap inserted on this cylindrical wall up to a distance of a few millimeters from the face of the lamp holder 22 so as to leave an open portion of the free wall.
• a dust filter can be placed between the cap and the vertical wall.
• the lamps in particular the lower lamps 16b and 16c in this example, produce heat which accumulates in the housing of the traffic light 10.
• This heat is channeled by a flow of air flowing in the grooves 32 to the opening of the electrical connection 30 thus allowing the heat to be discharged to the outside of the housing.
• the grooves 32 are connected to the air inlet 34 situated in a lower zone of the lamp holder 22.
• a lamp holder 22 comprising grooves 32 advantageously makes it possible to obtain a good evacuation of the heat produced by the light sources while maintaining a sufficient compactness for the integration of the signaling light box onto the light source. vehicle structure.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=39205158

Family Applications (1)

Country Status (3)

Family Cites Families (3)

• 2007
  • 2007-11-15 FR FR0759055A patent/FR2923776B1/fr not_active Expired - Fee Related
• 2008
  • 2008-08-25 EP EP08848697A patent/EP2220424A1/de not_active Withdrawn
  • 2008-08-25 WO PCT/FR2008/051524 patent/WO2009063147A1/fr active Application Filing

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events