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
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
  • F21S41/19—Attachment of light sources or lamp holders
  • F21S41/192—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
  • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
  • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
  • F21S41/19—Attachment of light sources or lamp holders
  • F21S41/194—Bayonet attachments

Definitions

• the invention relates to a lamp holder for a module or a lighting and / or signaling device for a vehicle. More particularly, the invention relates to a lamp holder with a base, such as a lamp with locking lugs, for example an H8 lamp or a H1 lamp 1.
• the invention also relates to a module and a lighting device housing and / or signaling equipped with said support.
• the invention also relates to a method of assembling such a lamp holder.
• Figures 1 and 2 illustrate a known lighting device.
• Figure 1 illustrates a plan view of the housing.
• FIG. 2 is a sectional view of the housing along a longitudinal plane of FIG. 1, the section being illustrated by the arrows of FIG.
• a lamp mounted on its support is also shown.
• the illustrated lighting device is a front fog lamp. It comprises a housing 2 of generally circular cross section.
• the bottom of the housing 2 comprises a wall 4 comprising a generally flat portion.
• the wall 4 comprises an orifice 8 for receiving the base of a lamp.
• a metal part made from a sheet 6 is disposed on the wall, on the inner side of the wall, that is to say within the volume defined by the housing and the transparent and / or translucent ice 3 closing the housing.
• the metal part 6 also comprises a hole corresponding to that of the wall 4.
• the cutting of the metal part forming the orifice has a profile adapted to the base of the lamp.
• most projector incandescent lamps such as the lamp 20 which is illustrated in Figure 2 have a base 22 with locking lugs, namely that their base 22 comprises a plurality of pins or lugs 24 distributed on the circumference of said pellet.
• These pins or lugs 24 are often three in number. They are often arranged nonregularly on the circumference of the base so as to form a polarizer that allows the mounting of a single lamp, either H8 or H1 1.
• the profile of the opening 8 of the housing base comprises several ramps 14 intended to cooperate with the pins or lugs 24.
• the metal part 6 is fixed to the wall 4 by means of the two studs 10 and 12 molded with the wall 4.
• the metal part comprises openings corresponding to receiving the pins 10 and 12.
• the orifices of the metal part comprise means for retaining the part with respect to the pins. These means are visible in FIG. It can be seen that the upper orifice receiving the stud 10 comprises two tongues oriented generally horizontally and intended to grip the stud.
• the area surrounding the lower orifice receiving the pin 12 is divided into four sectors forming four tongues also for pinching the pin 12.
• the pins are generally conical so as to facilitate the engagement of the metal part.
• the mounting of the metal part 6, however, requires increasing effort until it comes into contact with the wall 4.
• the metal part may not be fully in contact with the wall, resulting in a variation of the functional dimension e illustrated in the enlarged portion of FIG. 2.
• This functional dimension corresponds to the thickness of the wall 4 plus the thickness of the sheet of the metal part 6 and a possible surge linked to a boss around the nipples.
• the very presence of the locking tabs cooperating with the nipples generates a slight return of the metal part during its assembly. Perfect veneering of the metal part on the wall is therefore not possible, resulting in a significant tolerance on the functional dimension e.
• the tolerance on the functional dimension has the effect of making the mounting of the lamp difficult. Indeed, the ramps 14 of contact with the lugs 24 of the base 22 of the lamp are found more distant from the outer surface of the wall 4 as originally intended. Despite the presence of a flexible seal 26 at the bearing surface of the lamp on the wall 4, a larger torque may then be required for mounting the lamp.
• the rear body 28 of the lamp is not particularly ergonomic and, moreover, the accessibility to this area in the vehicle is not always good, a large torque to apply when mounting the lamp can cause real productivity problems.
• the nominal dimension e is 2.85 mm. Given intrinsic tolerances in the manufacture of the wall 4 and the metal part 6, the dimension e may exceed the value of 3.1 mm. For such values, the locking torque exceeds 1.5 Nm. However, the normal mounting torque of the lamp is preferably 1 .mu.m to 1.5 Nm max.
• the nature of the assembly is likely to move the metal part 6 away from the wall 4. Indeed, during assembly, the base 22 of the lamp 20 is inserted into the orifice 8 and then oriented so that that the lugs 24 correspond to the profile of the orifice 8. During this operation, the operator may be tempted to exert a force insertion of the lamp believing that the latter is in correspondence with the orifice while n ' is not the case. This effort will be taken up by the metal part and can move it away from the wall 4. It is also known to fix the lamp holder to the wall of a module or a lighting and / or signaling device by simple screwing. This type of assembly is more expensive in assembly time but allows a better veneer of the lamp holder on the wall. Screw drums must then be provided at the wall. They are often subject to porosity problems related to the plastic injection process. These porosity defects can cause rejects of parts in manufacture or breakages during the assembly by screwing when these defects have not been detected.
• the object of the invention is to propose a solution to the problem of excessively wide tolerances on the functional dimension discussed previously and on the excessive variation of the mounting torque of the lamp on the support.
• the invention relates to a lamp holder with a base, for a module or lighting and / or signaling device, comprising: a body made of plastic material; a metal part with an orifice for receiving the base of the lamp, the metal part being fixed to the body; remarkable in that the metal part is fixed to the body by overmolding.
• Fixing the metal part to the body is preferably provided mainly, more preferentially still exclusively, by overmolding.
• the overmoulding is located at at least a part of the edge of the periphery of the metal part.
• the overmolding may extend over a major part of the perimeter of the metal part, or even on its entirety.
• the body is overmolded on the metal part.
• the metal part can take various forms. It may be generally circular, possibly with at least one non-circular portion to mechanically link it in rotation via the overmolding.
• the metal part comprises at least one attachment hole to the body, the overmolding being at the level of the hole and / or at least one of the fixing holes. This hole or these holes are preferably arranged laterally with respect to the orifice receiving the base of the lamp.
• the portion of the metal part around the orifice is generally flat, the metal part being preferably made from a sheet.
• the thickness of the sheet is between 0.5 and 2 mm, preferably between 0.5 and 1.5 mm, more preferably between 0.5 and 1 mm.
• the body comprises a wall with an orifice and against which the metal part is in contact, the metal part being preferably in direct contact with the wall.
• the wall comprises at least one support element intended to support the metal part at a distance from said wall, the overmoulding being preferentially with the or at least one of the support elements, that is to say that is, the support element is overmolded on the metal part.
• said body is preferably a lighting module reflector.
• the outline of the orifice of the metal part is configured in such a way as to undo the base of the lamp.
• the outline of the orifice in the housing is configured so as to undo the base of the lamp.
• the body comprises ramps moving from the edge of the orifice in the housing to the metal part, thus making it possible to bring the locking lugs to the metal part, when the lamp is locked, in particular in rotation on the body.
• the invention also relates to a lighting and / or signaling module comprising a lamp holder, which is remarkable in that the lamp holder is in accordance with the invention.
• the lamp holder is a reflector.
• the invention also relates to a lighting device and / or signaling device comprising a lamp holder, characterized in that the lamp holder is in accordance with the invention.
• the lamp support and the housing form a single piece, in particular obtained by molding.
• the invention also relates to a lighting and / or signaling device comprising a housing or a lighting module and / or signaling according to the invention.
• the invention is particularly suitable for lighting and / or signaling devices whose housing has dimensions of width, length and depths less than 15 cm, and even less than 10 cm.
• the present invention indeed provides a practical solution in which the metal plate is a heat shield between the light source and the bottom of the housing, to protect the latter from the heat released by the light source, including a lamp.
• this lighting and / or signaling device is an anti-fog lighting device. This is advantageous because the fog lamps are often small in comparison with the projectors.
• the invention also relates to a method of manufacturing a lamp holder with a base, for a module or lighting and / or signaling device, comprising the following steps: (a) preparation of a plastic body; (b) placing on the body of a metal part with an orifice intended to receive the base of the lamp, characterized by the following step (c) overmoulding of plastic material on the metal part and the body in view of its attachment to the body.
• the subject of the invention is also a method for manufacturing a lamp holder with a base, for a module or lighting and / or signaling device, comprising the following steps: (a) provision of a mold for the plastic injection molding of the support; remarkable by the following steps: (b) placing in the mold a metal part with a hole intended to receive the base of the lamp; (c) injection of the plastic material to form the body and to less partially overmold the metal piece for attachment to the body. This process is simpler and more economical.
• the lamp support obtained by the manufacturing method according to the invention is a support according to the invention. All the characteristics described above in relation to the support and the module or the device are also disclosed in combination with the two methods above.
• the over-molding of the metal part on the body or more precisely the wall of the support makes it possible to secure the latter at low cost, but with greater precision as to its position.
• This tighter tolerance on the position of the metal part makes it possible to achieve a more precise positioning of the lamp and, more particularly, a tighter tolerance on the functional dimension of mounting of the lamp.
• Obtaining a tight tolerance in the functional dimension on which the lamp locking torque depends will make it possible to obtain a substantially smaller locking torque range and hence a much better controlled locking torque.
• the result is easier editing, especially on production lines and after-sales service.
• This easier assembly is particularly advantageous when the accessibility to the rear part of the lighting and / or signaling device is poor. This situation is common especially for fog lamps.
• the control of the tightening torque will reduce the risk of untimely water ingress.
• the overmolding also makes it possible to discharge the screwing drums necessary for fixing the metal part on injected reflectors.
• the overmolding makes it possible to fulfill the difficulties related to the porosity of these domes and to the rejection of parts.
• manual handling of reflectors, including aluminized reflectors, for screwing requires special care.
• Overmolding also makes it possible to fulfill these difficulties.
• FIG. 1 is a plan view of a fog lamp box provided with a lamp holder according to the state of the art
• - Figure 2 is a sectional view along the axis of Figure 1, a lamp and an ice being mounted on the support thus illustrated;
• FIG. 3 is a double plan view in section of a housing provided with a lamp holder according to a first embodiment of the invention
• FIG. 4 is a plan and side view of the metal part of the lamp holder of FIG. 3;
• FIG. 5 is a plan and sectional double view of a housing provided with a lamp holder according to a second embodiment of the invention.
• FIG. 6 is a perspective view of the rear portion of a lighting module provided with a lamp holder according to a third embodiment of the invention.
• FIGS. 3 to 7 are a perspective view of the rear portion of a lighting module similar to that of Figure 6 and provided with a lamp holder according to a fourth embodiment of the invention.
• Some elements constituting the devices illustrated in FIGS. 3 to 7 correspond to those of FIGS. 1 and 2.
• a coherent numbering has been adopted to designate these various elements, knowing that the reference signs of FIG. 3 correspond to those of FIG. the difference is that they are increased by 100.
• FIG. 3 illustrates a projector box 102 similar to that of FIG. 1. It defines an interior volume with a transparent ice (not visible) intended to close it. It comprises a wall 104 at the bottom of the volume in question. The wall comprises an orifice 108 for receiving a lamp. The lamp is of the incandescent type with a base with locking lugs. A metal piece 106 is disposed on the wall, more precisely on the inner face of the wall 104. Said metal part 106 is generally flat and made from a sheet having a thickness of about 0.8 mm. It comprises an orifice whose profile is adapted to the lamp to be supported. The lamp to be supported can be of type H1 1 or any other type with a base with locking lugs.
• the profile of the opening made in the wall 104 of the housing comprises several ramps 1 14 with which the pins of the base of the lamp will cooperate, so that thanks to their profile, the lugs will be brought in support against the metal part 106 when the lamp will be turned during the locking.
• Figure 3 comprises a sectional view of the housing along the axis of section identified by the arrows.
• the metal part 106 is fixed to the wall 104 by an overmolding 1 16 at the outer edge of the part 106.
• the overmolding in question may be an insert molding, it is that is, placing the metal part in a mold and injecting the plastic material around said part.
• the enlarged view of the edge of the orifice 108 of FIG. 3 illustrates the lower tolerances obtained for the functional dimension e of mounting the lamp on the support thus formed.
• the metal part 106 is in full contact with the wall 104, and the overmolding 1 16 on at least a portion of the outer edge of the metal part 106 ensures unconditional retention thereof against the wall, and hence a tolerance very thin on the dimension e corresponding to the sum of the thicknesses of the wall 104 and the metal part 106.
• the dimension e is for example 2.85 mm. This dimension may vary within a tolerance of 0.5 mm, in particular because of the influence of the tolerances of the infected plastic and the sheet.
• overmolding 1 16 extends over the entire circumference of the metal part 106 and partially covers the visible surface of said part.
• FIG. 4 illustrates the single metal part 106. It is generally flat and has a circular contour 120 with however two opposite straight sections 1 18. These straight sections 1 18 make it possible to ensure a mechanical connection in rotation of the part 106 with respect to the housing. Indeed, although the overmolding ensures a certain cohesion between the molded plastic material and the metal material of the workpiece, slippage could nevertheless occur, especially when applying exaggerated lamp mounting torques.
• This circular shape of the outline 120 is not limiting, it could be in particular rectangular. It should be noted that the overmolding that has just been described does not necessarily have to extend over the entire circumference.
• FIG. 5 illustrates a second exemplary embodiment of the invention. It is a case 1002 similar to that of the first embodiment of FIG. 3. Only the metal part 1006 supporting the lamp and the overmoldings 1016 are different. The explanations relating to the box which have been made in connection with this first embodiment, except those which are specific to the metal part and the overmoulding, also apply here.
• the metal part 1006 is of generally rectangular shape, the edges at the small sides of the rectangle, however, having a profile with an irregular profile 1019.
• the side edges at the long sides of the rectangle have sections 1018 of sheet metal bent at 90 ° by relative to the general plane of the part, these edges having the function of stiffening the metal part.
• the metal part is fixed to the wall 1004 of the casing 1002 by over-molding of material on the metal part as well as through at least one orifice of the metal part. In the illustrated example, there are six orifices, but this example is not limiting.
• the sectional view of Figure 5 illustrates the central orifices, that is to say located on the cutting axis. These orifices are filled with the overmolded plastic material 1016 on the metal part 1006.
• the overmoulding may be an insert molding, that is to say consisting of placing the metal part in a mold and injecting the plastic material around said part.
• the metal part 1006 is disposed on the inner face of the wall 1004, that is to say the face defining the cavity formed by the housing and for receiving the lamp. The latter is inserted from the outside of the housing through the orifice 1008 so as to bear on the outer face of the wall 1004.
• the lamp fixing means namely the pins protruding from the base (see discussion of Figure 2), cooperate with the metal part 1006, especially with the ramps 1014 of the housing, so as to exert a tensile force on the base of the lamp, maintaining it in stable support on the outer face of the wall 1002.
• the number and the arrangement of overmolding orifices may of course vary from the example just described. Indeed, a smaller number of orifices and possibly a different arrangement of the latter can be envisaged.
• Figure 6 illustrates a third embodiment of the invention. Unlike the previous examples, the wall 10004 supporting the metal part is no longer that of a housing but that of a lighting module 10002, intended to be placed in a lighting device, such as a projector.
• the overmoulding may be an insert molding, that is to say consisting of placing the metal part in a mold and injecting the plastic material around said part comprising the
• the metal part 10006 is no longer disposed directly against the wall 10004 but against the support elements 10005. These support elements 10005 project from the wall 10004 so that the metal part 10006 is at a distance. of the said wall 10004.
• the metal part 10006 serving as a support for the lamp 10020 is non-planar. It comprises a central portion of generally cylindrical shape and a generally flat portion with two "ears" resting on the support elements 10005.
• Each of the lateral portions forming lateral protrusions, legs or “ears”, comprises one or more orifices intended to receive a pin or several pins 10016, respectively overmolded.
• each of the legs comprises a single overmolded pin.
• the support elements 10005 may comprise a hole of selected geometry, intended to receive the pin during overmolding.
• the lamp 10020 is held in place in the cylindrical portion of the metal part 10006 by a U-shaped, spring-loaded rod (not shown).
• the ends of the rod are housed in joints 10032 of the metal piece.
• a loop connecting these ends is folded on the lamp and plate its base on the metal piece. It is fixed in stress in hooks 10030, so that by elasticity the rod holds the lamp firmly.
• the metal part 10006 is visible from outside the lighting module and the lamp comes into direct contact on said part.
• This arrangement has the advantage of allowing an electrical connection of the metal part via an external connector. This electrical connection can ensure the power supply of the lamp via a connector of the latter (such as for example its base) in contact with the metal part 10006.
• the lamp 10020 can thus have only one electrical connector.
• FIG. 7 illustrates a fourth embodiment of the invention. It constitutes a variant of the embodiment of FIG. 6. Indeed, FIG. 7 differs from FIG. 6 in that the lateral protuberances of the metal piece 100006 forming tabs and which bear on the support elements 100005 are overmoulded via the overmolding blocks 100016.
• the tabs do not necessarily have a hole or hole due to overmoulding at least part of their contour.
• the metal part for supporting the lamp can take various forms without departing from the scope of the invention.
• the type of lamp can also vary. Reference has been made to lamps of the type H8 and H1 1 in the description, it being understood that the invention can be applied to other types of lamp.
• the shape of the wall of the support thus formed with the metal part can take various forms. It does not have to be generally flat, it can indeed be left-handed and complex. Nor does it necessarily have to be a case wall. Indeed, it may be a wall or any structural part of a lighting and / or signaling module. The same goes for the metal part receiving the lamp. With regard to overmolding, this can take various forms. It may include over-molding through one or more orifices of the metal part and / or on the edge of said part.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Non-Portable Lighting Devices Or Systems Thereof (AREA)
• Fastening Of Light Sources Or Lamp Holders (AREA)
• Lighting Device Outwards From Vehicle And Optical Signal (AREA)

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Applications Claiming Priority (2)

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Citations (6)

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• 2011
  • 2011-11-04 FR FR1159976A patent/FR2982214B1/fr active Active
• 2012
  • 2012-10-26 EP EP12783181.6A patent/EP2773900A1/de not_active Withdrawn
  • 2012-10-26 WO PCT/EP2012/071317 patent/WO2013064439A1/fr active Application Filing
  • 2012-10-26 CN CN201280054059.8A patent/CN103946624B/zh active Active
  • 2012-11-02 TW TW101140939A patent/TWI572812B/zh active

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