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EP1533563B1 - Device for fixing a light source on a part of an automobile headlamp, and method thereof - Google Patents

Device for fixing a light source on a part of an automobile headlamp, and method thereof Download PDF

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Publication number
EP1533563B1
EP1533563B1 EP04292699.8A EP04292699A EP1533563B1 EP 1533563 B1 EP1533563 B1 EP 1533563B1 EP 04292699 A EP04292699 A EP 04292699A EP 1533563 B1 EP1533563 B1 EP 1533563B1
Authority
EP
European Patent Office
Prior art keywords
lamp
bulb
counterpart
tabs
ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04292699.8A
Other languages
German (de)
French (fr)
Other versions
EP1533563A1 (en
Inventor
Guillaume Tronquet
Daniel Josquin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Vision SAS
Original Assignee
Valeo Vision SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Valeo Vision SAS filed Critical Valeo Vision SAS
Publication of EP1533563A1 publication Critical patent/EP1533563A1/en
Application granted granted Critical
Publication of EP1533563B1 publication Critical patent/EP1533563B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V25/00—Safety devices structurally associated with lighting devices
    • 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
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/17—Discharge light sources
    • 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

Definitions

  • the invention relates to a system for fixing a light source on a counterpart of a motor vehicle headlamp.
  • the invention relates to a fastening system for fixing different types of light sources incorporating a discharge lamp.
  • the invention has applications in the automotive field and, more specifically, in the field of light projection for motor vehicles. It finds, in particular, applications for fixing a light source with possibility of interchangeability between light sources of different types.
  • the light projection devices (or light projectors) for motor vehicles are provided with light sources which can be of different kinds.
  • the front headlamps of the vehicles are equipped with light sources which can be of two different kinds, namely: a first kind with a halogen bulb, and a second type with a discharge bulb.
  • the light source is also equipped with a high voltage module which provides the power supply of the discharge lamp.
  • each of these light sources includes a discharge bulb, a bulb foot and a high voltage module.
  • the high voltage module is immovably fixed in the case of a lamp D1 and, conversely, removably in the case of a lamp D2.
  • the high voltage module is an integral part of the lamp.
  • the high voltage module is not integrated in the lamp; it constitutes an independent piece, removably mounted on the lamp.
  • FIG. 1 An example of a lamp D1 is shown on the figure 1 .
  • This figure shows a light source 1 comprising a discharge bulb 2, a bulb base 4 and a high voltage module 3.
  • the bulb 2 is fixed integrally with the module 3 at the location of the bulb foot 4.
  • An optical reflector 5 is provided with a hole 6 for passing through a base 7. Through the orifice 6, passes the bulb 2.
  • a body 2a of the bulb 2 is housed inside the reflector 5.
  • the bulb foot 4 is located outside the reflector 5.
  • a lamp holder 8 for example of circular cylindrical shape, is an integral part of the reflector 5.
  • the lamp holder 8 and the reflector 5 together form a single piece called counterpart 9 of the projector.
  • the lamp holder 8 serves to support the discharge bulb 2. It also allows to center and orient the discharge lamp 2 inside the reflector 5.
  • the lamp holder 8 may also be a separable part of the reflector 5.
  • the lamp holder 8 is then not an integral part of the reflector; it is fixed integrally to the reflector at the time of mounting the projector.
  • the lamp holder 8 and the reflector form, in this case too, the counterpart of the projector.
  • the discharge lamp 2 is surmounted by a high voltage module 3, integral with said lamp.
  • This module 3 has a substantially square outer contour, a relatively small size compared to a lamp D2 and its module, which will be described later.
  • the fact that the module 3 is irremovable entails certain disadvantages. Indeed, when a user is eager to change the discharge bulb of a projector of his vehicle, for example because it is faulty, he is obliged to change the entire bulb and high voltage module. In addition, the change of this bulb and high voltage module assembly is relatively difficult because, firstly, of the difficulty of access to the lamp D1 and the operations to be performed to remove the faulty assembly and install the new assembly and because, on the other hand, risks due to the high voltage present in the module. The user is therefore obliged to change the whole by a professional, which entails, in addition to the cost of the whole, a labor cost.
  • FIG. 2 An example of a lamp D2 with its high voltage module is represented on the figure 2 .
  • This figure 2 shows a light source 11 comprising a discharge bulb 12.
  • a high voltage electrical module 13 is removably attached to the bulb 12 at the location of a bulb base 14.
  • a reflector 15 is provided with place of the base 17, of an orifice passage 16 passing through the bulb 12.
  • the body 12a of the bulb 12 is housed inside the reflector 15.
  • the bulb foot 14 is located outside the reflector 15.
  • the lamp D2 comprises a lamp holder 18, for example of circular cylindrical shape, which may be an integral part of the reflector 15, or be a separate piece, integral with the reflector 15.
  • the lamp holder 18 and the reflector 15 together form the counterpart 19 of the projector.
  • the bulb has no associated electronics, i.e. the high voltage module is independent of the bulb.
  • the high voltage module is not an integral part of the discharge lamp: it is attached to the bulb after the introduction of the bulb in the reflector. It is therefore possible, during the assembly and disassembly of the projector, to disconnect the high voltage module from the bulb.
  • This has a certain advantage over the lamp D1. Indeed, with a lamp D2, it is possible, when the bulb is defective, to change only the bulb and keep the high voltage module initial. However, changing a bulb in a D2 lamp is even more delicate than changing the bulb and module assembly for a D1 lamp.
  • the user in the difficult place of access that is a projector, the user must first remove the module, and remove the bulb; he must then change the bulb and put the module back on the bulb, with all the risks inherent to the high voltage in the module. The user is therefore obliged to change the bulb by a professional.
  • a closed ring With this closed ring, at first, the high voltage module is fixed to the discharge bulb, and the discharge bulb is housed in the reflector. The ring is then brought into the fixing zone. For this, we slide the high voltage module in the ring to the fixing area. The ring on the reflector is then blocked by a bayonet.
  • a fixing ring is not suitable for a light source D1. Indeed, the square outer contour of the high voltage module of the light source D1 opposes its introduction into the closed ring or, then, this ring would have a diameter too large to allow, subsequently, the fixation of the light source on the counterparty.
  • the object of the invention is precisely to solve the disadvantages of the techniques described above by making it possible to fix a bulb on a spotlight counterpart, with the same fastening system for a lamp D1 as for a lamp D2.
  • the invention proposes a system for fixing a light source with an adaptable discharge bulb for different types of light sources.
  • This system is particularly suitable for gas-discharge light sources, such as lamps D1 and D2, because it ensures electrical continuity and electromagnetic shielding to prevent leakage of electromagnetic fields to the interior of the vehicle.
  • the invention relates to a light projection device for a motor vehicle according to claim 1.
  • the invention also relates to a motor vehicle, characterized in that it comprises at least one preceding light projection device.
  • the lamps D1 and D2 have very different shapes from each other. They still have a common, standardized part.
  • This common part is the bulb foot.
  • the bulb foot is the rear part of the discharge bulb by which it is attached to the high voltage module.
  • This bulb foot is substantially cylindrical, of the same diameter for the lamps D1 and D2.
  • the height between the neck of the bulb foot and the base of the high voltage module may vary between a lamp D1 and a lamp D2. Indeed, in the case of a lamp D1, this height is normalized. On the other hand, in the case of a lamp D2, this height depends on the high voltage module used.
  • the invention therefore proposes to use this characteristic common to both lamps. More specifically, it proposes to fix a system for fixing a lamp D1 or a lamp D2 around this common part.
  • the fastening system of the invention is therefore intended to be positioned around the bulb base of a light source D1 or D2. This fastening system makes it possible to hold and lock the discharge bulb with the lamp holder, that is to say the upper part of the counterpart of the projector, at the location of the bulb base.
  • FIG. 3A shows the system in an unlocked position and the figure 3B shows the system in its locked position.
  • FIG. 3A there is shown the fastening system 20 mounted on the counterpart 19, in the case of a lamp D2 for which the high module
  • This fastening system 20 comprises a rigid ring 21 and a flexible ring 31.
  • the flexible ring 31 is electrically conductive. It is placed inside the rigid ring 21.
  • the rigid ring 21 is movable in rotation.
  • the flexible ring 31 is not rotatable relative to the counterpart 19.
  • it has a degree of freedom, which is a radial translation, relative to the counterpart of the projector. In other words, as will be seen later, the flexible ring 31 can move radially towards the bulb base, under the effect of a pressure exerted by the rigid ring 21.
  • the flexible ring 31 is made of a flexible and electrically conductive material, for example a metallic material. It thus ensures an electrical function, at the same time, by internal contact on the counterpart and by contact of the contact tabs on the high voltage module.
  • This flexible ring 31 has a relatively circular shape; more specifically, it has a circular shape when the fastening system is in the locked position; it is circular by segment, or sector, when the fastening system is in the unlocked position.
  • the flexible ring has a tangential spacing greater at one point than at another point, that is to say greater at the end of the segment than at the beginning of the segment. This can be done by shearing the ring at the end of the segment, which puts the end of the segment naturally behind the rest of the segment.
  • One or more of these different tabs can further ensure a pre-hold role of the lamp on the counterpart, before the locking of the lamp is achieved. This tab then allows the lamp is stable on the counterpart, in a position ready to be locked.
  • the contact tabs are thin and long so as to come into contact with an electrically conductive part of the lamp.
  • the holding tabs are wider than the contact tabs, so that any change of lamp position in the counterpart can be prevented when the system is in the locked position.
  • the positioning tab is thin and long so as to be inserted into a housing of the lamp.
  • Each tongue has a substantially vertical flank 34 and a substantially horizontal base 35.
  • the flank has a free end and a common end with one side of the base.
  • the side of the base opposite the flank is connected to a flange 36 which connects several tabs between them.
  • the tabs are divided into several sectors. There are as many sectors of tabs as there are tabs of maintenance.
  • Each sector, or segment therefore has a retaining tab and several contact tabs, the retaining tab being placed at the end of the sector.
  • One of the sectors may also include a positioning tab.
  • the flank of the contact tongues may have a more or less curved shape, forming at least one arc of a circle, so as to give flexibility to the tabs to allow better contact with the high voltage module.
  • the holding tongues comprise, in addition to a sidewall 34 and a base 35, a holding arm 37 located in the same plane as the base 35, perpendicular to the sidewall 34 and directed towards the bulb foot 14.
  • C is this holding arm 37 which serves to maintain the foot in the counterpart, when the fastening system is in its locked position. It is understood that with several holding tabs, for example three, distributed symmetrically on the flexible ring, that is to say around the bulb base, ensures a fixed positioning of the bulb foot to the inside the flexible ring and therefore the counterpart.
  • the positioning tongue comprises, in addition to a sidewall 34 and a base 35, a housing arm situated in the same plane as the base 35, perpendicular to the sidewall 34 and directed towards the bulb base 14.
  • This arm housing is intended to fit into a housing of the lamp to ensure a unique correct positioning of the bulb in the counterpart.
  • the holding and positioning tabs all have a sidewall 34.
  • This sidewall 34 allows these tabs to ensure, in addition to their respective role of holding and positioning, a role of electrical conduction and electromagnetic shielding as well as the contact tabs.
  • the flank of the holding tabs has approximately the same curved shape as the contact tabs.
  • these holding and positioning tongues may not include a flank; in this case, they ensure only their initial role, namely the maintenance and positioning of the bulb in the counterpart.
  • the flexible ring can be made by cutting and bending in a metal sheet whose type of metal and thickness are chosen according to the desired flexibility.
  • the tongues can also be folded with different shapes and sizes depending on their role. In particular, the contact tongues may have a curved shape ensuring better electrical contact with the lamp.
  • the flexible ring 31 which has just been described, is installed in a rigid ring 21.
  • the sectors of the flexible ring are placed side by side, so that the securing tongue of a sector is next to a contact tab from another sector.
  • the rigid ring 21 is made of a plastic or metal material. It has a circular shape, by segment. In other words, the rigid ring 21 is formed of several segments, for example three, integral with each other. Each segment forms an arc, connected to another segment by a setback. In particular, on the figure 3A , the rigid ring 21 comprises three segments 21a, 21b and 21c. The segment 21a (and respectively 21b and 21c) is separated from the segment 21b (and respectively 21c and 21a) by a recess 23a (and respectively 23b and 23c). These recesses have, moreover, the advantage of facilitating the gripping of the ring by the user to rotate it.
  • the rigid ring 21 has first lugs 22a, 22b (also called prominent parts) forming cams.
  • first lugs 22a, 22b also called prominent parts
  • the rigid ring has as many first lugs as the flexible ring has retaining tabs.
  • the rigid ring thus comprises three first lugs, only two being visible in the figure. These lugs are intended, in the locked position, to push the holding tabs towards the bulb base.
  • the rigid ring may comprise a second lug, not shown on the figure 3A , forming a cam. This second lug is intended, in the locked position, to put the positioning tab in a housing of the lamp to ensure proper positioning of said lamp.
  • the rigid ring is made so that the flexible ring is against the inner face of said ring and blocked, upwards, by the lugs of the ring.
  • the flexible ring can also be locked down by other lugs used to secure the entire fastening system to the counterpart.
  • the rigid ring 21 has the role of ensuring the locking and unlocking of the fixing system by a rotation about an axis XX 'of the system, that is to say by a rotation relative to the flexible ring and compared to the counterparty.
  • the rigid ring is movable in rotation while the flexible ring is not rotatable relative to the counterpart.
  • the rigid ring may comprise, on its inner face, a boss in hard points intended to prevent the ring from returning to position. free. This makes it possible to unlock but not to return to the free position.
  • the fastening system is in the unlocked position.
  • the rigid ring is therefore in the open position relative to the flexible ring.
  • the retaining tabs 32 of the flexible ring are each positioned near a recess of the rigid ring; the lugs 22 of the rigid ring are placed in front of contact tongues and do not press on any tongue.
  • the flexible ring is free from any contact or support with a lamp.
  • the flexible ring By rotating the rigid ring, for example at an angle of about 40 °, the flexible ring is supported by the lug at its most off-center, that is to say at the level of the retaining tab.
  • Each lug 22a, 22b then bears against a retaining tongue 32a, 32b, pushing this tongue towards the bulb foot 14.
  • the retaining tongue Under the effect of the pushing by the lug, the retaining tongue is found near the foot of bulb, even in support against the foot of bulb, which makes it possible to prevent the bulb from moving in the counterpart.
  • the figure 3B shows the fixing system of the invention in a locked position, that is to say after rotation of the rigid ring.
  • This figure shows that, in this locked position, the lugs 22c, 22a of the rigid ring 21 press on the retaining tabs 32c, 32a of the flexible ring 31.
  • the holding tabs are then pushed into the system, that is to say towards the bulb base 14. They can thus bear against the lamp and, in particular, the bulb foot.
  • the high voltage module can then be placed around the bulb foot.
  • the high voltage module is then in contact with all or part of the contact tongues 33, which creates an electrical contact between the high voltage module and these tabs.
  • the contact tabs make it possible to shield the electromagnetic radiation emitted between the high voltage module and the counterpart. This ensures electromagnetic shielding between the high voltage module and the counterpart.
  • the figure 4 represents the fixing system of the invention mounted around a light source D2, when the system is locked.
  • This Figure shows the counterpart 19 of the projector, with its reflector 15 and its lamp holder 18, on which is mounted the fastening system 20 of the invention and the lamp D2.
  • the contact tabs 33 of the fastening system 20 are in electrical contact with the high voltage module of the light source D2. More precisely, in the case of a lamp D2, the contact tongues are in contact with the connector of the lamp D2.
  • the retaining tongues 32 bear against the bulb foot.
  • the figure 5 represents the fixing system of the invention mounted around a light source D1, when the system is locked.
  • This figure 5 shows the counterpart 9 of the projector, with the reflector 5 and the lamp holder 8, on which is mounted the fixing system 20 of the invention and the lamp D1.
  • the contact tongues 33 of the fastening system 20 are in electrical contact with the lamp D1, by a metal part of the lamp located under the connector 3.
  • contact tabs are not present all around the circumference of the flexible ring, but only on parts.
  • the area on which a lug will be rotated may not include a tongue so as to make a flat surface between the initial position and the final position of the lug, that is to say between the position unlocked and the locked position of the lug.
  • the Figures 4 and 5 show that the space between the fixing system 20 and the high voltage module 3 of a lamp D1 is lower than that between the fixing system and the high voltage module of a lamp D2.
  • the module of a lamp D1 has a square shape whose base has dimensions greater than the diameter of the fastening system.
  • the base of the module of the lamp D2 has a diameter smaller than that of the fixing system.
  • the contact tabs therefore have different dimensions in the case of a lamp system D1 and a lamp system D2.
  • the contact tabs for lamp D2 are longer than the contact tongues for lamp D1, since they come into contact with the module itself.
  • the contact tabs for a lamp D1 come into contact with a part situated below the module, that is to say closer to the bulb foot; they are therefore shorter.
  • the curvature of the contact tongues may also vary depending on the lamp considered.
  • the fastening system of the invention is therefore identical for lamps D1 and for lamps D2, except for the flexible ring which may have different lengths of tongues. As will be understood later, this difference is not troublesome, in the sense that it does not interfere with the interchangeability of the lamps.
  • the fixing system is positioned and fixed according to the following method: firstly the fixing system is made by assembling the flexible ring, adapted to a lamp D1 or a lamp D2 , with the rigid ring, then inserting this system vertically on the upper part of the counterpart. The system is then fixed on this counterpart by conventional means, for example, in force, bayonet or snap.
  • the fixing system may comprise, in its part located below the flexible ring, lugs for fixing the fastening system on the counterpart of the projector.
  • the lamp In the case of a lamp D1, the lamp is positioned on the fastening system by placing the discharge bulb inside the counterpart, in a V-shaped housing of the counterpart.
  • the position of the lamp D1 in the fixing system is correct when the positioning tab is resting against the lamp D1, pushing said lamp at the bottom of the V-shaped housing.
  • the fixing system is placed in the locked position by gating, that is to say by a rotation of the rigid ring about the axis XX 'and therefore a rotation of the rigid ring relative to the flexible ring.
  • the discharge bulb is placed inside the counterpart, the bulb foot being positioned on the fixing system.
  • the position of the lamp D2 in the fastening system is correct when the lamp is in the V-shaped housing of the counterpart and the positioning tab bears against the D2 lamp, pushing it to the bottom of the V-shaped housing.
  • the fastening system is put in the locked position by gagging, that is to say by a rotation of the rigid ring about the axis XX 'and therefore a rotation of the rigid ring relative to the flexible ring.
  • the high voltage module can then be put in place on the bulb foot.
  • the positioning tab is a spring blade that pushes the lamp at the bottom of the V-shaped housing made in the counterpart.
  • the role of this positioning tab is to make up the games that can be between the lamp and the counterpart by pushing the lamp radially into the V housing arranged in the counterpart.
  • the positioning tab is placed radially opposite the V.
  • the rigid ring when placed in the locked position, has a lug which pushes the positioning tab towards the center of the system, pushing the lamp radially from so that it is wedged into the V-shaped housing of the counterpart.
  • the positioning tab can also be used as a polarizer, when mounting the lamp on the counterpart, that is to say, it offers a single position possible during assembly.
  • FIGS 6A and 6C sectional side views of the fastening system of the invention are shown in the case of a lamp D1 when the system is unlocked and locked, respectively.
  • the Figures 6B and 6D represent top views of the fastening system of the invention, in the case of a lamp D1, when the system is, respectively, unlocked and locked.
  • the Figures 6A and 6B show the position of the rigid ring 21 and the flexible ring 31 when the system is unlocked. In particular, they show the position of the first lugs 22a, 22b, 22c of the rigid ring relative to the retaining tabs 32a, 32b, 32c of the flexible ring. These figures also show the position of the second lug 28 relative to the positioning tongues 38 of the flexible ring 31.
  • the positioning tongue 38 In the unlocked position, the positioning tongue 38 is housed in a housing of the bulb foot, but it is angled in this accommodation. Locking the system allows this tab to exert a push radial on the lamp to push the lamp to the bottom of the V-shaped housing of the counterpart.
  • This V-shaped housing is represented on the Figure 6B by two flats 40 located radially opposite the housing 39 receiving the positioning tab 38.
  • Figures 6A and 6B also show the positioning of the contact tongues 33, between the tongues 32 holding. We can easily see the differences in size that can be between the different kinds of tabs.
  • FIGs 6C and 6D represent the fixing system in the case of a lamp D1, when the system is locked.
  • the first and the second lugs of the ring do not bear on any tongue.
  • the rigid ring is rotated about 40 ° with respect to the flexible ring, the first lugs 22 are placed in front of the holding tongues 32 and the second lug 28 in front of the positioning tab 38.
  • the placement of these pins can be done in an orderly manner, that is to say that the second lug 28 is placed before the first lugs 22.
  • This rotation of the rigid ring has the effect of pushing the tabs holding down to the bulb foot, making the flexible ring completely circular. This also has the effect of pushing the positioning tab at the bottom of its housing 39, allowing it to exert a pressure plating the lamp D1 in the housing V.
  • the rigid ring 21 thus acts as a cam on the flexible ring 31.
  • the Figures 7A and 7C are side views, in section, of the fixing system of the invention, in the case of a lamp D2, when the system is, respectively, unlocked and locked.
  • the Figures 7B and 7D are top views of the fastening system of the invention, in the case of a lamp D2, when the system is, respectively, unlocked and locked.
  • the Figures 7A and 7B show the position of the rigid ring 21 and the flexible ring when the system is unlocked. In particular, they show the position of the first lugs 22a, 22b, 22c of the rigid ring relative to the retaining tabs 32a, 32b, 32c of the flexible ring. These figures also show the position of the second lug 28 relative to the positioning tongues 38 of the flexible ring 31.
  • the positioning tab 38 In unlocked position, the positioning tab 38 is housed in a housing of the bulb base, but it is at an angle in this housing ..
  • the system lock allows this tab to exert a radial thrust on the lamp to push the lamp at the bottom of the V-shaped housing of the counterpart.
  • This V-shaped housing is represented on the Figure 7B by two flats 40 located radially opposite the housing 39 receiving the positioning tab 38.
  • Figures 7A and 7B also show the positioning of the contact tongues 33, between the tongues 32 holding. We can easily see the differences in size that can be between the different kinds of tabs.
  • the Figures 7C and 7D represent the fixing system in the case of a lamp D2, when the system is locked.
  • the first and the second lugs of the ring do not bear on any tongue.
  • the rigid ring is rotated about 40 ° with respect to the flexible ring, the first lugs 22 are placed in front of the holding tongues 32 and the second lug 28 in front of the positioning tab 38.
  • the placement of these pins can be done in an orderly manner, that is to say that the second lug 28 is placed before the first lugs 22.
  • This rotation of the rigid ring has the effect of pushing the tabs holding down to the bulb foot, making the flexible ring completely circular. This also has the effect of pushing the positioning tab at the bottom of its housing 39, allowing it to exert a pressure plating the lamp D2 in the housing V.
  • the flexible ring 31 ensures the mechanical strength and the positioning of a lamp D1 or D2 on the counterpart, as well as the electrical continuity and the electromagnetic shielding between the counterpart and the high voltage module . Before locking, it acts as a pre-hold of the lamp because the inner diameter of the circle on which the retaining tabs are distributed, in the unlocked position, is less than the outside diameter of the lamp base.
  • the projector is standard for a D1 lamp and for a D2 lamp. It can therefore be realized in large series, in production, and it is simply at the moment of the installation of the light source that one chooses, if need be, to take a flexible ring with large contact tongues, for a D2 lamp, or small contact tabs, for a lamp D1. It is thus possible to mount a lamp D1 or a lamp D2, according to the choice, according to the cost and the availability of one or the other of the lamps.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

Domaine de l'inventionField of the invention

L'invention concerne un système de fixation d'une source lumineuse sur une contrepartie d'un projecteur de véhicule automobile. L'invention concerne, en particulier, un système de fixation permettant de fixer différents types de sources lumineuses incorporant une ampoule à décharge.The invention relates to a system for fixing a light source on a counterpart of a motor vehicle headlamp. In particular, the invention relates to a fastening system for fixing different types of light sources incorporating a discharge lamp.

L'invention trouve des applications dans le domaine de l'automobile et, plus précisément, dans le domaine de la projection de lumière pour véhicules automobiles. Elle trouve, en particulier, des applications pour la fixation d'une source lumineuse avec possibilité d'interchangeabilité entre des sources lumineuses de types différents.The invention has applications in the automotive field and, more specifically, in the field of light projection for motor vehicles. It finds, in particular, applications for fixing a light source with possibility of interchangeability between light sources of different types.

Etat de la techniqueState of the art

Le document US 5 144 189 décrit un dispositif de projection de lumière selon le préambule de la revendication 1.The document US 5,144,189 discloses a light projection device according to the preamble of claim 1.

Actuellement, les dispositifs de projection de lumière (ou projecteurs de lumière) pour véhicules automobiles sont munis de sources lumineuses qui peuvent être de différentes sortes. En particulier, les projecteurs avant des véhicules sont équipés de sources lumineuses qui peuvent être de deux sortes différentes, à savoir : une première sorte à ampoule halogène, et une seconde sorte à ampoule à décharge. Dans ce second cas, la source lumineuse est également équipée d'un module haute tension qui assure l'alimentation électrique de l'ampoule à décharge.Currently, the light projection devices (or light projectors) for motor vehicles are provided with light sources which can be of different kinds. In particular, the front headlamps of the vehicles are equipped with light sources which can be of two different kinds, namely: a first kind with a halogen bulb, and a second type with a discharge bulb. In this second case, the light source is also equipped with a high voltage module which provides the power supply of the discharge lamp.

Parmi les sources lumineuses à ampoules à décharge, il existe actuellement deux types de sources lumineuses appelées lampe D1 et lampe D2. Chacune de ces sources lumineuses, ou lampes, comporte une ampoule à décharge, un pied d'ampoule et un module haute tension. Le module haute tension est fixé de manière inamovible, dans le cas d'une lampe D1 et, au contraire, de manière amovible dans le cas d'une lampe D2. Autrement dit, dans le cas d'une lampe D1, le module haute tension fait partie intégrante de la lampe. Dans le cas d'une lampe D2, le module haute tension n'est pas intégré dans la lampe ; il constitue une pièce indépendante, montée de façon amovible sur la lampe.Among the light sources with gas discharge bulbs, there are currently two types of light sources called lamp D1 and lamp D2. Each of these light sources, or lamps, includes a discharge bulb, a bulb foot and a high voltage module. The high voltage module is immovably fixed in the case of a lamp D1 and, conversely, removably in the case of a lamp D2. In other words, in the case of a lamp D1, the high voltage module is an integral part of the lamp. In the case of a lamp D2, the high voltage module is not integrated in the lamp; it constitutes an independent piece, removably mounted on the lamp.

Un exemple d'une lampe D1 est représenté sur la figure 1. Cette figure montre une source lumineuse 1 comportant une ampoule à décharge 2, un pied d'ampoule 4 et un module à haute tension 3. L'ampoule 2 est fixée solidairement au module 3 à l'endroit du pied d'ampoule 4. Un réflecteur optique 5 est muni d'un orifice 6 de passage au niveau d'un culot 7. Par l'orifice 6, passe l'ampoule 2. Un corps 2a de l'ampoule 2 est logé à l'intérieur du réflecteur 5. Le pied d'ampoule 4 est situé à l'extérieur du réflecteur 5. Dans l'ensemble de lampe D1 représenté sur la figure 1, un porte lampe 8, par exemple de forme cylindrique circulaire, fait partie intégrante du réflecteur 5. Le porte lampe 8 et le réflecteur 5 forment, ensemble, une seule et même pièce appelée contrepartie 9 du projecteur. Le porte lampe 8 a pour rôle de supporter l'ampoule à décharge 2. Il permet aussi de centrer et d'orienter l'ampoule à décharge 2 à l'intérieur du réflecteur 5.An example of a lamp D1 is shown on the figure 1 . This figure shows a light source 1 comprising a discharge bulb 2, a bulb base 4 and a high voltage module 3. The bulb 2 is fixed integrally with the module 3 at the location of the bulb foot 4. An optical reflector 5 is provided with a hole 6 for passing through a base 7. Through the orifice 6, passes the bulb 2. A body 2a of the bulb 2 is housed inside the reflector 5. The bulb foot 4 is located outside the reflector 5. In the lamp assembly D1 shown in FIG. figure 1 a lamp holder 8, for example of circular cylindrical shape, is an integral part of the reflector 5. The lamp holder 8 and the reflector 5 together form a single piece called counterpart 9 of the projector. The lamp holder 8 serves to support the discharge bulb 2. It also allows to center and orient the discharge lamp 2 inside the reflector 5.

Le porte lampe 8 peut aussi être une pièce séparable du réflecteur 5. Le porte lampe 8 ne fait alors pas partie intégrante du réflecteur ; il est fixé solidairement au réflecteur au moment du montage du projecteur. Le porte lampe 8 et le réflecteur forment, dans ce cas aussi, la contrepartie du projecteur.The lamp holder 8 may also be a separable part of the reflector 5. The lamp holder 8 is then not an integral part of the reflector; it is fixed integrally to the reflector at the time of mounting the projector. The lamp holder 8 and the reflector form, in this case too, the counterpart of the projector.

Dans l'ensemble de lampe D1, l'ampoule à décharge 2 est surmontée d'un module haute tension 3, solidaire de ladite ampoule. Ce module 3 a un contour extérieur sensiblement carré, d'un encombrement relativement faible par rapport à une lampe D2 et son module, qui seront décrits ultérieurement. Cependant, le fait que le module 3 soit inamovible entraîne certains inconvénients. En effet, lorsqu'un utilisateur est désireux de changer l'ampoule à décharge d'un projecteur de son véhicule, par exemple parce qu'elle est défaillante, il est obligé de changer tout l'ensemble ampoule et module haute tension. En outre, le changement de cet ensemble ampoule et module haute tension est relativement délicat du fait, d'une part, de la difficulté d'accès à la lampe D1 et des opérations à effectuer pour retirer l'ensemble défaillant et installer le nouvel ensemble et du fait, d'autre part, des risques dus à la haute tension présente dans le module. L'utilisateur est donc obligé de faire changer l'ensemble par un professionnel, ce qui entraîne, en plus du coût de l'ensemble, un coût de main d'oeuvre.In the lamp assembly D1, the discharge lamp 2 is surmounted by a high voltage module 3, integral with said lamp. This module 3 has a substantially square outer contour, a relatively small size compared to a lamp D2 and its module, which will be described later. However, the fact that the module 3 is irremovable entails certain disadvantages. Indeed, when a user is eager to change the discharge bulb of a projector of his vehicle, for example because it is faulty, he is obliged to change the entire bulb and high voltage module. In addition, the change of this bulb and high voltage module assembly is relatively difficult because, firstly, of the difficulty of access to the lamp D1 and the operations to be performed to remove the faulty assembly and install the new assembly and because, on the other hand, risks due to the high voltage present in the module. The user is therefore obliged to change the whole by a professional, which entails, in addition to the cost of the whole, a labor cost.

Un exemple de lampe D2 avec son module haute tension est représenté sur la figure 2. Cette figure 2 montre une source lumineuse 11 comportant une ampoule à décharge 12. Un module électrique haute tension 13 est fixé de manière amovible sur l'ampoule 12 à l'endroit d'un pied d'ampoule 14. Un réflecteur 15 est muni, à l'endroit du culot 17, d'un orifice de passage 16 laissant passer l'ampoule 12. Le corps 12a de l'ampoule 12 est logé à l'intérieur du réflecteur 15. Le pied d'ampoule 14 est situé à l'extérieur du réflecteur 15. Comme pour la lampe D1, la lampe D2 comporte un porte lampe 18, par exemple de forme cylindrique circulaire, qui peut faire partie intégrante du réflecteur 15, ou bien être une pièce séparée, solidaire du réflecteur 15. Le porte lampe 18 et le réflecteur 15 forment, ensemble, la contrepartie 19 du projecteur.An example of a lamp D2 with its high voltage module is represented on the figure 2 . This figure 2 shows a light source 11 comprising a discharge bulb 12. A high voltage electrical module 13 is removably attached to the bulb 12 at the location of a bulb base 14. A reflector 15 is provided with place of the base 17, of an orifice passage 16 passing through the bulb 12. The body 12a of the bulb 12 is housed inside the reflector 15. The bulb foot 14 is located outside the reflector 15. As for the lamp D1, the lamp D2 comprises a lamp holder 18, for example of circular cylindrical shape, which may be an integral part of the reflector 15, or be a separate piece, integral with the reflector 15. The lamp holder 18 and the reflector 15 together form the counterpart 19 of the projector.

Dans l'ensemble de lampe D2, l'ampoule n'a aucune électronique associée, c'est-à-dire que le module haute tension est indépendant de l'ampoule. Autrement dit, le module haute tension ne fait pas partie intégrante de l'ampoule à décharge : il est fixé sur l'ampoule après la mise en place de l'ampoule dans le réflecteur. Il est donc possible, lors du montage et du démontage du projecteur, de désolidariser le module haute tension de l'ampoule. Ceci présente un avantage certain par rapport à la lampe D1. En effet, avec une lampe D2, il est possible, lorsque l'ampoule est défaillante, de ne changer que l'ampoule et de conserver le module haute tension initial. Cependant, le changement d'une ampoule dans une lampe D2 est encore plus délicat que le changement de l'ensemble ampoule et module pour une lampe D1. En effet, dans le lieu difficile d'accès qu'est un projecteur, l'utilisateur doit d'abord retirer le module, et retirer l'ampoule ; il doit ensuite changer l'ampoule et remettre le module sur l'ampoule, avec tous les risques inhérents à la haute tension dans le module. L'utilisateur est donc obligé de faire changer l'ampoule par un professionnel.In the lamp assembly D2, the bulb has no associated electronics, i.e. the high voltage module is independent of the bulb. In other words, the high voltage module is not an integral part of the discharge lamp: it is attached to the bulb after the introduction of the bulb in the reflector. It is therefore possible, during the assembly and disassembly of the projector, to disconnect the high voltage module from the bulb. This has a certain advantage over the lamp D1. Indeed, with a lamp D2, it is possible, when the bulb is defective, to change only the bulb and keep the high voltage module initial. However, changing a bulb in a D2 lamp is even more delicate than changing the bulb and module assembly for a D1 lamp. Indeed, in the difficult place of access that is a projector, the user must first remove the module, and remove the bulb; he must then change the bulb and put the module back on the bulb, with all the risks inherent to the high voltage in the module. The user is therefore obliged to change the bulb by a professional.

On connaît, actuellement des dispositifs destinés à fixer une ampoule sur une contrepartie de lampe D2. Un exemple d'un tel dispositif est une bague fermée. Avec cette bague fermée, dans un premier temps, on fixe le module haute tension à l'ampoule à décharge, puis on loge l'ampoule à décharge dans le réflecteur. On amène ensuite la bague dans la zone de fixation. Pour cela, on fait glisser le module haute tension dans la bague jusqu'à la zone de fixation. On bloque alors par un baïonnettage la bague sur le réflecteur. Une telle bague de fixation n'est pas adaptée pour une source lumineuse D1. En effet, le contour extérieur carré du module haute tension de la source lumineuse D1 s'oppose à son introduction dans la bague fermée ou, alors, cette bague aurait un diamètre trop important pour permettre, par la suite, la fixation de la source lumineuse sur la contrepartie.Currently known devices for fixing a bulb on a lamp counterpart D2. An example of such a device is a closed ring. With this closed ring, at first, the high voltage module is fixed to the discharge bulb, and the discharge bulb is housed in the reflector. The ring is then brought into the fixing zone. For this, we slide the high voltage module in the ring to the fixing area. The ring on the reflector is then blocked by a bayonet. Such a fixing ring is not suitable for a light source D1. Indeed, the square outer contour of the high voltage module of the light source D1 opposes its introduction into the closed ring or, then, this ring would have a diameter too large to allow, subsequently, the fixation of the light source on the counterparty.

Il n'est donc pas possible, avec de tels dispositifs, d'interchanger les deux lampes D1 et D2. Autrement dit, un utilisateur ayant un véhicule muni d'une source lumineuse D2 ne peut, ultérieurement, pour des raisons de coût ou de disponibilité, introduire une source lumineuse D1 dans son dispositif de projection de lumière, et inversement.It is therefore not possible, with such devices, to interchange the two lamps D1 and D2. In other words, a user having a vehicle equipped with a light source D2 can not subsequently, for reasons of cost or availability, introduce a light source D1 into its light projection device, and vice versa.

Il existe aussi des systèmes de fixation à ressort destinés soit aux lampes D1, soit aux lampes D2, mais avec impossibilité d'interchanger ces deux types de lampes pour des raisons de géométrie et d'encombrement.There are also spring fastening systems for either D1 lamps or D2 lamps, but with inability to interchange these two types of lamps for reasons of geometry and size.

Il existe, par ailleurs, des projecteurs de lumière pour véhicules automobiles ayant des systèmes de verrouillage de lampes permettant le verrouillage de plusieurs types de lampes standards. Un tel système est décrit par exemple dans la demande EP-A-1 108 950 .There are, moreover, light projectors for motor vehicles having lamp locking systems for locking several types of standard lamps. Such a system is described for example in the application EP-A-1,108,950 .

Cependant, un tel système n'est pas adapté pour des sources lumineuses à ampoule à décharge. En effet, ce type de source lumineuse à ampoule à décharge, connectée à un module haute tension, doit comporter des moyens qui permettent d'assurer, d'une part, une continuité électrique et, d'autre part, un blindage pour éviter les fuites du champ électromagnétique. En effet, dans ce type de source lumineuse, du fait de la génération d'une haute tension par le module haute tension, le projecteur de lumière est soumis à de nombreux rayonnements électromagnétiques. Afin d'éviter une dispersion du rayonnement électromagnétique à l'intérieur du véhicule, un blindage du dispositif de projection de lumière est nécessaire. En effet, les rayonnements électromagnétiques peuvent générer de nombreuses perturbations dans l'ensemble électrique du véhicule. Plusieurs fonctions d'un véhicule automobile actuel étant gérées par un système électronique, ces perturbations électromagnétiques peuvent avoir des conséquences graves.However, such a system is not suitable for light sources with a discharge bulb. In fact, this type of light source with a discharge bulb, connected to a high voltage module, must have means which make it possible, on the one hand, to provide electrical continuity and, on the other hand, a shielding to prevent electromagnetic field leaks. Indeed, in this type of light source, due to the generation of a high voltage by the high voltage module, the light projector is subjected to many electromagnetic radiation. In order to avoid dispersion of the electromagnetic radiation inside the vehicle, a shielding of the light projection device is necessary. Indeed, the electromagnetic radiation can generate many disturbances in the electrical assembly of the vehicle. Since many functions of a current motor vehicle are managed by an electronic system, these electromagnetic disturbances can have serious consequences.

Exposé de l'inventionPresentation of the invention

L'invention a justement pour but de résoudre les inconvénients des techniques exposées précédemment en permettant de fixer une ampoule sur une contrepartie de projecteur, avec un même système de fixation pour une lampe D1 que pour une lampe D2. A cette fin, l'invention propose un système de fixation d'une source lumineuse à ampoule à décharge adaptable pour différents types de sources lumineuses. Ce système est particulièrement adapté pour les sources lumineuses à ampoule à décharge, telles que les lampes D1 et D2, car il permet d'assurer une continuité électrique et un blindage électromagnétique pour éviter les fuites de champs électromagnétiques vers l'intérieur du véhicule.The object of the invention is precisely to solve the disadvantages of the techniques described above by making it possible to fix a bulb on a spotlight counterpart, with the same fastening system for a lamp D1 as for a lamp D2. To this end, the invention proposes a system for fixing a light source with an adaptable discharge bulb for different types of light sources. This system is particularly suitable for gas-discharge light sources, such as lamps D1 and D2, because it ensures electrical continuity and electromagnetic shielding to prevent leakage of electromagnetic fields to the interior of the vehicle.

De façon plus précise, l'invention concerne un dispositif de projection de lumière pour véhicule automobile selon la revendication 1.More specifically, the invention relates to a light projection device for a motor vehicle according to claim 1.

Le système de l'invention peut aussi incorporer tout ou partie des caractéristiques suivantes :

  • au moins une des languettes est une languette de maintien mécanique.
  • au moins une des languettes est une languette de continuité électromagnétique.
  • au moins une des languettes est une languette de positionnement de la lampe.
  • l'une parmi ces languettes de maintien mécanique, de continuité électromagnétique et de positionnement assure un pré-maintien de la lampe sur la contrepartie, avant verrouillage de ladite lampe.
  • les languettes de maintien et de positionnement sont mobiles radialement avec une position déverrouillée et une position verrouillée.
  • la bague rigide comporte, sur une face intérieure, au moins un premier ergot apte à pousser la languette de maintien mécanique et à la maintenir dans une position verrouillée.
  • la bague rigide comporte, sur une face intérieure, au moins un second ergot apte à pousser la languette de positionnement et à la maintenir dans une position verrouillée.
The system of the invention may also incorporate all or some of the following features:
  • at least one of the tongues is a mechanical holding tab.
  • at least one of the tongues is an electromagnetic continuity tab.
  • at least one of the tabs is a tab for positioning the lamp.
  • one of these tabs for mechanical holding, electromagnetic continuity and positioning ensures a pre-hold of the lamp on the counterpart, before locking said lamp.
  • the holding and positioning tongues are radially movable with an unlocked position and a locked position.
  • the rigid ring comprises, on an inner face, at least a first lug adapted to push the mechanical retaining tongue and maintain it in a locked position.
  • the rigid ring comprises, on an inner face, at least one second lug adapted to push the positioning tab and maintain it in a locked position.

L'invention concerne également un procédé de fixation d'une source lumineuse sur une contrepartie d'un dispositif de projection de lumière au moyen du système de fixation précédent. Ce procédé se caractérise par le fait qu'il comporte les étapes suivantes :

  • positionnement et fixation du système de fixation autour d'une extrémité d'un porte lampe de la contrepartie,
  • insertion d'une ampoule à décharge de la source lumineuse à l'intérieur de la contrepartie jusqu'à ce qu'un pied d'ampoule de la source lumineuse soit en appui sur le système de fixation ou la contrepartie,
  • verrouillage du système de fixation par rotation d'une partie dudit système.
The invention also relates to a method of fixing a light source on a counterpart of a light projection device by means of the preceding fixing system. This method is characterized in that it comprises the following steps:
  • positioning and fixing the fixing system around one end of a lamp holder of the counterpart,
  • inserting a discharge bulb of the light source inside the counterpart until a bulb foot of the light source is resting on the fixing system or the counterpart,
  • locking the fastening system by rotation of a part of said system.

Avantageusement, le procédé de l'invention peut aussi incorporer tout ou partie des caractéristiques suivantes :

  • le verrouillage du système de fixation consiste à faire subir une rotation à la bague rigide par rapport à l'anneau flexible et à la contrepartie.
  • la fixation du système de fixation sur le porte lampe est réalisé en force, par encliquetage et verrouillage.
Advantageously, the method of the invention may also incorporate all or some of the following characteristics:
  • locking the fastening system consists of rotating the rigid ring relative to the flexible ring and the counterpart.
  • fixing the fixing system on the lamp holder is made in force, by snapping and locking.

L'invention concerne également un véhicule automobile, caractérisé en ce qu'il comporte au moins un dispositif de projection de lumière précédent.The invention also relates to a motor vehicle, characterized in that it comprises at least one preceding light projection device.

Brève description des figuresBrief description of the figures

  • La figure 1, déjà décrite, représente une vue en coupe longitudinale d'un projecteur de véhicule classique muni d'une lampe D1.The figure 1 , already described, is a longitudinal sectional view of a conventional vehicle headlamp with a lamp D1.
  • La figure 2 déjà décrite, représente une vue en coupe longitudinale d'un projecteur de véhicule classique muni d'une lampe D2 et d'un module haute tension.The figure 2 already described, shows a longitudinal sectional view of a conventional vehicle headlamp with a lamp D2 and a high voltage module.
  • Les figures 3A et 3B représentent chacune une vue en perspective du système de fixation de l'invention, respectivement, dans le cas où le système est déverrouillé et dans le cas où le système est verrouillé, dans le cas d'une lampe D2.The Figures 3A and 3B each represent a perspective view of the fastening system of the invention, respectively, in the case where the system is unlocked and in the case where the system is locked, in the case of a lamp D2.
  • La figure 4 représente le système de fixation de l'invention monté autour d'une source lumineuse D2.The figure 4 represents the fixing system of the invention mounted around a light source D2.
  • La figure 5 représente le système de fixation de l'invention monté autour d'une source lumineuse D1.The figure 5 represents the fixing system of the invention mounted around a light source D1.
  • Les figures 6A à 6D représentent des vues en coupe latérale et des vues en coupe de dessus du système de fixation de l'invention, dans le cas où il est déverrouillé et dans le cas où il est verrouillé, pour une source lumineuse D1.The Figures 6A to 6D are side sectional views and sectional views from above of the fastening system of the invention, in the case where it is unlocked and in the case where it is locked, for a light source D1.
  • Les figures 7A à 7D représentent des vues en coupe latérale et des vues en coupe de dessus du système de fixation de l'invention, dans le cas où il est déverrouillé et dans le cas où il est verrouillé, pour une source lumineuse D2.The Figures 7A to 7D represent side sectional views and sectional views from above of the fastening system of the invention, in the case where it is unlocked and in the case where it is locked, for a light source D2.
Description détaillée de modes de réalisation de l'inventionDETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION

D'après ce qui précède, on comprend que les lampes D1 et D2 ont des formes très différentes l'une de l'autre. Elles ont tout de même une partie commune, normalisée. Cette partie commune est le pied d'ampoule. Le pied d'ampoule est la partie arrière de l'ampoule à décharge par laquelle celle-ci est fixée au module haute tension. Ce pied d'ampoule est sensiblement cylindrique, de même diamètre pour les lampes D1 et D2. Cependant, la hauteur entre le col du pied d'ampoule et la base du module haute tension peut varier entre une lampe D1 et une lampe D2. En effet, dans le cas d'une lampe D1, cette hauteur est normalisée. Par contre, dans le cas d'une lampe D2, cette hauteur dépend du module haute tension utilisé.From the above it is understood that the lamps D1 and D2 have very different shapes from each other. They still have a common, standardized part. This common part is the bulb foot. The bulb foot is the rear part of the discharge bulb by which it is attached to the high voltage module. This bulb foot is substantially cylindrical, of the same diameter for the lamps D1 and D2. However, the height between the neck of the bulb foot and the base of the high voltage module may vary between a lamp D1 and a lamp D2. Indeed, in the case of a lamp D1, this height is normalized. On the other hand, in the case of a lamp D2, this height depends on the high voltage module used.

L'invention propose donc d'utiliser cette caractéristique commune aux deux lampes. Plus précisément, elle propose de fixer un système de fixation d'une lampe D1 ou d'une lampe D2 autour de cette partie commune. Le système de fixation de l'invention est donc destiné à être positionné autour du pied d'ampoule d'une source lumineuse D1 ou D2. Ce système de fixation permet de maintenir et de verrouiller l'ampoule à décharge avec le porte lampe, c'est-à-dire la partie haute de la contrepartie du projecteur, à l'endroit du pied d'ampoule.The invention therefore proposes to use this characteristic common to both lamps. More specifically, it proposes to fix a system for fixing a lamp D1 or a lamp D2 around this common part. The fastening system of the invention is therefore intended to be positioned around the bulb base of a light source D1 or D2. This fastening system makes it possible to hold and lock the discharge bulb with the lamp holder, that is to say the upper part of the counterpart of the projector, at the location of the bulb base.

Ce système de fixation de l'invention est représenté sur les figures 3A et 3B, dans des vues en perspective. Plus précisément, la figure 3A montre le système dans une position déverrouillée et la figure 3B montre le système dans sa position verrouillée.This fastening system of the invention is represented on the Figures 3A and 3B , in perspective views. More specifically, the figure 3A shows the system in an unlocked position and the figure 3B shows the system in its locked position.

Sur la figure 3A, on a représenté le système de fixation 20 monté sur la contrepartie 19, dans le cas d'une lampe D2 pour laquelle le module haute tension n'a pas encore été fixé sur le pied d'ampoule 14. Ce système de fixation 20 comporte une bague rigide 21 et un anneau flexible 31. L'anneau flexible 31 est électriquement conducteur. Il est placé à l'intérieur de la bague rigide 21. La bague rigide 21 est mobile en rotation. L'anneau flexible 31 n'est pas mobile en rotation par rapport à la contrepartie 19. Par contre, il a un degré de liberté, qui est une translation radiale, par rapport à la contrepartie du projecteur. Autrement dit, comme on le verra par la suite, l'anneau flexible 31 peut se déplacer radialement, vers le pied d'ampoule, sous l'effet d'une pression exercée par la bague rigide 21.On the figure 3A , there is shown the fastening system 20 mounted on the counterpart 19, in the case of a lamp D2 for which the high module This fastening system 20 comprises a rigid ring 21 and a flexible ring 31. The flexible ring 31 is electrically conductive. It is placed inside the rigid ring 21. The rigid ring 21 is movable in rotation. The flexible ring 31 is not rotatable relative to the counterpart 19. On the other hand, it has a degree of freedom, which is a radial translation, relative to the counterpart of the projector. In other words, as will be seen later, the flexible ring 31 can move radially towards the bulb base, under the effect of a pressure exerted by the rigid ring 21.

L'anneau flexible 31 est réalisé dans un matériau flexible et électriquement conducteur, par exemple une matière métallique. Il assure ainsi une fonction électrique, en même temps, par contact intérieur sur la contrepartie et par contact des languettes de contact sur le module haute tension. Cet anneau flexible 31 a une forme relativement circulaire ; plus précisément, il a une forme circulaire lorsque le système de fixation est en position verrouillée ; il est circulaire par segment, ou secteur, lorsque le système de fixation est en position déverrouillée. En d'autres termes, l'anneau flexible a un écartement tangentiel plus grand en un point qu'en un autre point, c'est-à-dire plus grand en fin de segment qu'en début de segment. Cela peut être réalisé en cisaillant l'anneau en fin de segment, ce qui met la fin du segment naturellement en retrait par rapport au reste du segment.The flexible ring 31 is made of a flexible and electrically conductive material, for example a metallic material. It thus ensures an electrical function, at the same time, by internal contact on the counterpart and by contact of the contact tabs on the high voltage module. This flexible ring 31 has a relatively circular shape; more specifically, it has a circular shape when the fastening system is in the locked position; it is circular by segment, or sector, when the fastening system is in the unlocked position. In other words, the flexible ring has a tangential spacing greater at one point than at another point, that is to say greater at the end of the segment than at the beginning of the segment. This can be done by shearing the ring at the end of the segment, which puts the end of the segment naturally behind the rest of the segment.

Cet anneau flexible 31 comporte une pluralité de languettes. Ces languettes peuvent être de plusieurs sortes:

  • les languettes de contact, référencées 33, dont le rôle est d'assurer la continuité électrique et le blindage électromagnétique entre le module haute tension et la contrepartie, par contact avec une partie métallique de la lampe.
  • les languettes de maintien, référencées 32, dont le rôle est d'assurer le maintien en position de l'ampoule dans la contrepartie. Ces languettes de maintien peuvent être, par exemple, au nombre de trois. Elles comportent chacune une position verrouillée et une position déverrouillée. Ces languettes sont mobiles radialement.
  • une languette de positionnement, non visible sur la figure 3A, qui comporte une position verrouillée et une position déverrouillée. Cette languette de positionnement est également mobile radialement. Le rôle de cette languette de positionnement est de rectifier les jeux qu'il peut y avoir entre la lampe et le porte lampe (ou la partie fomant porte lampe de la contrepartie) en poussant la lampe radialement dans un logement en forme de V aménagé dans le porte lampe et décrit plus en détail ultérieurement. Cette languette de positionnement peut aussi constituer une sorte de détrompeur pour le système de fixation.
This flexible ring 31 has a plurality of tongues. These tongues can be of several kinds:
  • the contact tongues, referenced 33, whose role is to ensure the electrical continuity and the electromagnetic shielding between the high voltage module and the counterpart, by contact with a metal part of the lamp.
  • the retaining tabs, referenced 32, whose role is to maintain the position of the bulb in the counterpart. These holding tongues may be, for example, three in number. They each have a locked position and an unlocked position. These tongues are radially movable.
  • a positioning tab, not visible on the figure 3A which has a locked position and an unlocked position. This positioning tab is also movable radially. The role of this positioning tab is to rectify the games that may be between the lamp and the lamp holder (or the counterpart part lamp holder of the counterpart) by pushing the lamp radially in a V-shaped housing arranged in the lamp holder and described in more detail later. This positioning tab can also be a kind of key to the fastening system.

Une ou plusieurs parmi ces différentes languettes (languettes de maintien, languettes de contact et languette de positionnement) peut assurer, en outre, un rôle de pré-maintien de la lampe sur la contrepartie, avant que le verrouillage de la lampe ne soit réalisé. Cette languette permet alors que la lampe soit stable sur la contrepartie, dans une position prête à être verrouillée.One or more of these different tabs (holding tabs, contact tabs and positioning tab) can further ensure a pre-hold role of the lamp on the counterpart, before the locking of the lamp is achieved. This tab then allows the lamp is stable on the counterpart, in a position ready to be locked.

Ces languettes ont des dimensions différentes, en fonction de leur type et de leur rôle. Les languettes de contact sont fines et longues de façon à venir en contact contre une partie électriquement conductrice de la lampe. Les languettes de maintien sont plus larges que les languettes de contact, de façon à pouvoir empêcher tout changement de position de la lampe dans la contrepartie, lorsque le système est en position verrouillée. La languette de positionnement est fine et longue de façon à s'introduire dans un logement de la lampe.These tabs have different dimensions, depending on their type and role. The contact tabs are thin and long so as to come into contact with an electrically conductive part of the lamp. The holding tabs are wider than the contact tabs, so that any change of lamp position in the counterpart can be prevented when the system is in the locked position. The positioning tab is thin and long so as to be inserted into a housing of the lamp.

Chaque languette comporte un flanc 34 sensiblement vertical et une base 35 sensiblement horizontale. Le flanc a une extrémité libre et une extrémité commune avec un coté de la base. Le coté de la base opposée au flanc est relié à une collerette 36 qui relie plusieurs languettes entre elles. Les languettes sont réparties selon plusieurs secteurs. Il y a autant de secteurs de languettes qu'il y a de languettes de maintien. Chaque secteur, ou segment, comporte donc une languette de maintien et plusieurs languettes de contact, la languette de maintien étant placée en fin de secteur. L'un des secteurs peut comporter aussi une languette de positionnement.Each tongue has a substantially vertical flank 34 and a substantially horizontal base 35. The flank has a free end and a common end with one side of the base. The side of the base opposite the flank is connected to a flange 36 which connects several tabs between them. The tabs are divided into several sectors. There are as many sectors of tabs as there are tabs of maintenance. Each sector, or segment, therefore has a retaining tab and several contact tabs, the retaining tab being placed at the end of the sector. One of the sectors may also include a positioning tab.

Le flanc des languettes de contact peut avoir une forme plus ou moins courbe, formant au moins un arc de cercle, de façon à donner une flexibilité aux languettes pour permettre un meilleur contact avec le module haute tension.The flank of the contact tongues may have a more or less curved shape, forming at least one arc of a circle, so as to give flexibility to the tabs to allow better contact with the high voltage module.

Les languettes de maintien comportent, en plus d'un flanc 34 et d'une base 35, un bras de maintien 37 situé dans le même plan que la base 35, perpendiculaire au flanc 34 et dirigé vers le pied d'ampoule 14. C'est ce bras de maintien 37 qui sert à maintenir le pied dans la contrepartie, lorsque le système de fixation est dans sa position verrouillée. On comprend bien qu'avec plusieurs languettes de maintien, par exemple trois, réparties symétriquement sur l'anneau flexible, c'est-à-dire autour du pied d'ampoule, on assure un positionnement fixe du pied d'ampoule à l'intérieur de l'anneau flexible et donc de la contrepartie.The holding tongues comprise, in addition to a sidewall 34 and a base 35, a holding arm 37 located in the same plane as the base 35, perpendicular to the sidewall 34 and directed towards the bulb foot 14. C is this holding arm 37 which serves to maintain the foot in the counterpart, when the fastening system is in its locked position. It is understood that with several holding tabs, for example three, distributed symmetrically on the flexible ring, that is to say around the bulb base, ensures a fixed positioning of the bulb foot to the inside the flexible ring and therefore the counterpart.

La languette de positionnement comporte, en plus d'un flanc 34 et d'une base 35, un bras de logement situé dans le même plan que la base 35, perpendiculaire au flanc 34 et dirigé vers le pied d'ampoule 14. Ce bras de logement est destiné à venir s'insérer dans un logement de la lampe pour assurer un positionnement correct unique de l'ampoule dans la contrepartie.The positioning tongue comprises, in addition to a sidewall 34 and a base 35, a housing arm situated in the same plane as the base 35, perpendicular to the sidewall 34 and directed towards the bulb base 14. This arm housing is intended to fit into a housing of the lamp to ensure a unique correct positioning of the bulb in the counterpart.

Dans le cas des figures 3A et 3B, les languettes de maintien et de positionnement comportent toutes un flanc 34. Ce flanc 34 permet à ces languettes d'assurer, en plus de leur rôle respectif de maintien et de positionnement, un rôle de conduction électrique et de blindage électromagnétique au même titre que les languettes de contact. Dans ce cas, le flanc des languettes de maintien a approximativement la même forme courbe que les languettes de contact.In the case of Figures 3A and 3B , the holding and positioning tabs all have a sidewall 34. This sidewall 34 allows these tabs to ensure, in addition to their respective role of holding and positioning, a role of electrical conduction and electromagnetic shielding as well as the contact tabs. In this case, the flank of the holding tabs has approximately the same curved shape as the contact tabs.

Dans une variante, ces languettes de maintien et de positionnement peuvent ne pas comporter de flanc ; dans ce cas, elles assurent uniquement leur rôle initial, à savoir le maintien et le positionnement de l'ampoule dans la contrepartie.In a variant, these holding and positioning tongues may not include a flank; in this case, they ensure only their initial role, namely the maintenance and positioning of the bulb in the counterpart.

L'anneau flexible peut être réalisé par découpe et pliage dans une feuille métallique dont le type de métal et l'épaisseur sont choisis en fonction de la flexibilité souhaitée. Les languettes peuvent aussi être pliées avec des formes et des tailles différentes en fonction de leur rôle. En particulier, les languettes de contact peuvent avoir une forme courbe assurant un meilleur contact électrique avec la lampe.The flexible ring can be made by cutting and bending in a metal sheet whose type of metal and thickness are chosen according to the desired flexibility. The tongues can also be folded with different shapes and sizes depending on their role. In particular, the contact tongues may have a curved shape ensuring better electrical contact with the lamp.

L'anneau flexible 31, qui vient d'être décrit, est installé dans une bague rigide 21. Les secteurs de l'anneau flexible sont placés côte à côte, de façon à ce que la languette de maintien d'un secteur soit à coté d'une languette de contact d'un autre secteur.The flexible ring 31, which has just been described, is installed in a rigid ring 21. The sectors of the flexible ring are placed side by side, so that the securing tongue of a sector is next to a contact tab from another sector.

La bague rigide 21 est réalisée dans une matière plastique ou métallique. Elle a une forme circulaire, par segment. Autrement dit, la bague rigide 21 est formée de plusieurs segments, par exemple trois, solidaires les uns des autres. Chaque segment forme un arc de cercle, relié à un autre segment par un décrochement. En particulier, sur la figure 3A, la bague rigide 21 comporte trois segments 21a, 21b et 21c. Le segment 21a (et respectivement 21b et 21c) est séparé du segment 21b (et respectivement 21c et 21a) par un décrochement 23a (et respectivement 23b et 23c). Ces décrochements présentent, par ailleurs, l'avantage de faciliter la préhension de la bague par l'utilisateur pour lui faire subir une rotation.The rigid ring 21 is made of a plastic or metal material. It has a circular shape, by segment. In other words, the rigid ring 21 is formed of several segments, for example three, integral with each other. Each segment forms an arc, connected to another segment by a setback. In particular, on the figure 3A , the rigid ring 21 comprises three segments 21a, 21b and 21c. The segment 21a (and respectively 21b and 21c) is separated from the segment 21b (and respectively 21c and 21a) by a recess 23a (and respectively 23b and 23c). These recesses have, moreover, the advantage of facilitating the gripping of the ring by the user to rotate it.

La bague rigide 21 comporte des premiers ergots 22a, 22b (appelés aussi parties proéminentes) formant des cames. En fait, la bague rigide comporte autant de premiers ergots que l'anneau flexible a de languettes de maintien. Dans le cas de la figure 3A, la bague rigide comporte donc trois premiers ergots, deux seulement étant visibles sur la figure. Ces ergots sont destinés, en position verrouillée, à pousser les languettes de maintien vers le pied d'ampoule.The rigid ring 21 has first lugs 22a, 22b (also called prominent parts) forming cams. In fact, the rigid ring has as many first lugs as the flexible ring has retaining tabs. In the case of figure 3A , the rigid ring thus comprises three first lugs, only two being visible in the figure. These lugs are intended, in the locked position, to push the holding tabs towards the bulb base.

La bague rigide peut comporter un second ergot, non représenté sur la figure 3A, formant une came. Ce second ergot est destiné, en position verrouillée, à mettre la languette de positionnement dans un logement de la lampe afin d'assurer un positionnement correct de ladite lampe.The rigid ring may comprise a second lug, not shown on the figure 3A , forming a cam. This second lug is intended, in the locked position, to put the positioning tab in a housing of the lamp to ensure proper positioning of said lamp.

La bague rigide est réalisée de façon à ce que l'anneau flexible soit tout contre la face intérieure de ladite bague et bloqué, vers le haut, par les ergots de la bague. L'anneau flexible peut également être bloqué, vers le bas, par d'autres ergots utilisés pour fixer l'ensemble du système de fixation sur la contrepartie.The rigid ring is made so that the flexible ring is against the inner face of said ring and blocked, upwards, by the lugs of the ring. The flexible ring can also be locked down by other lugs used to secure the entire fastening system to the counterpart.

La bague rigide 21 a pour rôle d'assurer le verrouillage et le déverrouillage du système de fixation par une rotation autour d'un axe XX' du système, c'est-à-dire par une rotation par rapport à l'anneau flexible et par rapport à la contrepartie. Autrement dit, la bague rigide est mobile en rotation tandis que l'anneau flexible n'est pas mobile en rotation, par rapport à la contrepartie.The rigid ring 21 has the role of ensuring the locking and unlocking of the fixing system by a rotation about an axis XX 'of the system, that is to say by a rotation relative to the flexible ring and compared to the counterparty. In other words, the rigid ring is movable in rotation while the flexible ring is not rotatable relative to the counterpart.

En outre, la bague rigide peut comporter, sur sa face intérieure, un bossage en points durs destiné à éviter que la bague ne revienne en position libre. Cela permet donc de déverrouiller mais pas de repasser en position libre.In addition, the rigid ring may comprise, on its inner face, a boss in hard points intended to prevent the ring from returning to position. free. This makes it possible to unlock but not to return to the free position.

Dans le cas de la figure 3A, le système de fixation est en position déverrouillée. La bague rigide est donc en position ouverte par rapport à l'anneau flexible. Dans cette position, les languettes de maintien 32 de l'anneau flexible sont positionnées chacune à proximité d'un décrochement de la bague rigide ; les ergots 22 de la bague rigide sont placés devant des languettes de contact et n'appuient sur aucune languette. L'anneau flexible est donc libre de tout contact ou appui avec une lampe.In the case of figure 3A , the fastening system is in the unlocked position. The rigid ring is therefore in the open position relative to the flexible ring. In this position, the retaining tabs 32 of the flexible ring are each positioned near a recess of the rigid ring; the lugs 22 of the rigid ring are placed in front of contact tongues and do not press on any tongue. The flexible ring is free from any contact or support with a lamp.

En tournant la bague rigide, par exemple d'un angle d'environ 40°, l'anneau flexible est appuyé par l'ergot à son niveau le plus décentré, c'est-à-dire au niveau de la languette de maintien. Chaque ergot 22a, 22b vient alors en appui contre une languette de maintien 32a, 32b, poussant cette languette vers le pied d'ampoule 14. Sous l'effet de la poussée par l'ergot, la languette de maintien se retrouve à proximité du pied d'ampoule, voire en appui contre le pied d'ampoule, ce qui permet d'empêcher l'ampoule de bouger dans la contrepartie.By rotating the rigid ring, for example at an angle of about 40 °, the flexible ring is supported by the lug at its most off-center, that is to say at the level of the retaining tab. Each lug 22a, 22b then bears against a retaining tongue 32a, 32b, pushing this tongue towards the bulb foot 14. Under the effect of the pushing by the lug, the retaining tongue is found near the foot of bulb, even in support against the foot of bulb, which makes it possible to prevent the bulb from moving in the counterpart.

La figure 3B montre le système de fixation de l'invention dans une position verrouillée, c'est-à-dire après rotation de la bague rigide. Cette figure montre que, dans cette position verrouillée, les ergots 22c, 22a de la bague rigide 21 appuient sur les languettes de maintien 32c, 32a de l'anneau flexible 31. Les languettes de maintien sont alors poussées vers l'intérieur du système, c'est-à-dire vers le pied d'ampoule 14. Elles peuvent ainsi être en appui contre la lampe et, en particulier, le pied d'ampoule.The figure 3B shows the fixing system of the invention in a locked position, that is to say after rotation of the rigid ring. This figure shows that, in this locked position, the lugs 22c, 22a of the rigid ring 21 press on the retaining tabs 32c, 32a of the flexible ring 31. The holding tabs are then pushed into the system, that is to say towards the bulb base 14. They can thus bear against the lamp and, in particular, the bulb foot.

Ainsi, lorsque le système de fixation est verrouillé autour de l'ampoule, comme montré sur la figure 3B, le module haute tension peut alors être placé autour du pied d'ampoule. Le module haute tension se trouve alors en contact avec tout ou partie des languettes de contact 33, ce qui crée un contact électrique entre le module haute tension et ces languettes. En plus de ce contact électrique, les languettes de contact permettent de faire écran aux rayonnements électromagnétiques émis entre le module haute tension et la contrepartie. On assure ainsi un blindage électromagnétique entre le module haute tension et la contrepartie.Thus, when the fastening system is locked around the bulb, as shown on the figure 3B the high voltage module can then be placed around the bulb foot. The high voltage module is then in contact with all or part of the contact tongues 33, which creates an electrical contact between the high voltage module and these tabs. In addition to this electrical contact, the contact tabs make it possible to shield the electromagnetic radiation emitted between the high voltage module and the counterpart. This ensures electromagnetic shielding between the high voltage module and the counterpart.

La figure 4 représente le système de fixation de l'invention monté autour d'une source lumineuse D2, lorsque le système est verrouillé. Cette figure montre la contrepartie 19 du projecteur, avec son réflecteur 15 et son porte lampe 18, sur laquelle est monté le système de fixation 20 de l'invention et la lampe D2. On voit, sur cette figure 4, que les languettes de contact 33 du système de fixation 20 sont en contact électrique avec le module haute tension de la source lumineuse D2. Plus précisément, dans le cas d'une lampe D2, les languettes de contact sont en contact avec le connecteur de la lampe D2. Les languettes de maintien 32 sont en appui contre le pied d'ampoule.The figure 4 represents the fixing system of the invention mounted around a light source D2, when the system is locked. This Figure shows the counterpart 19 of the projector, with its reflector 15 and its lamp holder 18, on which is mounted the fastening system 20 of the invention and the lamp D2. We see, on this figure 4 , that the contact tabs 33 of the fastening system 20 are in electrical contact with the high voltage module of the light source D2. More precisely, in the case of a lamp D2, the contact tongues are in contact with the connector of the lamp D2. The retaining tongues 32 bear against the bulb foot.

La figure 5 représente le système de fixation de l'invention monté autour d'une source lumineuse D1, lorsque le système est verrouillé. Cette figure 5 montre la contrepartie 9 du projecteur, avec le réflecteur 5 et le porte lampe 8, sur laquelle est monté le système de fixation 20 de l'invention et la lampe D1. On voit, sur cette figure 5, que les languettes de contact 33 du système de fixation 20 sont en contact électrique avec la lampe D1, par une partie métallique de la lampe située sous le connecteur 3.The figure 5 represents the fixing system of the invention mounted around a light source D1, when the system is locked. This figure 5 shows the counterpart 9 of the projector, with the reflector 5 and the lamp holder 8, on which is mounted the fixing system 20 of the invention and the lamp D1. We see, on this figure 5 , that the contact tongues 33 of the fastening system 20 are in electrical contact with the lamp D1, by a metal part of the lamp located under the connector 3.

Dans l'exemple de la figure 5, des languettes de contact ne sont pas présentes sur toute la circonférence de l'anneau flexible, mais sur des parties seulement. Par exemple, la zone sur laquelle un ergot va être mis en rotation peut ne pas comporter de languette de façon à faire une surface plane entre la position initiale et la position finale de l'ergot, c'est-à-dire entre la position déverrouillée et la position verrouillée de l'ergot.In the example of the figure 5 contact tabs are not present all around the circumference of the flexible ring, but only on parts. For example, the area on which a lug will be rotated may not include a tongue so as to make a flat surface between the initial position and the final position of the lug, that is to say between the position unlocked and the locked position of the lug.

Dans le cas des figures 3A et 3B, par contre, il y a des languettes de contact réparties sur toute la circonférence de l'anneau flexible. Dans ce cas, c'est la forme tangentielle, ou circulaire par segment, de l'anneau qui permet le fait que les ergots n'appuient sur aucune languette jusqu'à la position verrouillée.In the case of Figures 3A and 3B on the other hand, there are contact tongues distributed over the entire circumference of the flexible ring. In this case, it is the tangential shape, or circular by segment, of the ring which allows the fact that the lugs do not press on any tongue to the locked position.

Les figures 4 et 5 montrent que l'espace entre le système de fixation 20 et le module haute tension 3 d'une lampe D1 est plus faible que celui entre le système de fixation et le module haute tension d'une lampe D2. Par ailleurs, le module d'une lampe D1 a une forme carrée dont la base a des dimensions supérieures au diamètre du système de fixation. Au contraire, la base du module de la lampe D2 a un diamètre inférieur à celui du système de fixation. Les languettes de contact ont donc des dimensions différentes dans le cas d'un système pour lampe D1 et d'un système pour lampe D2. En particulier, les languettes de contact pour lampe D2 sont plus longues que les languettes de contact pour lampe D1, puisqu'elles viennent en contact avec le module lui-même. Au contraire, les languettes de contact pour lampe D1 viennent en contact avec une partie situées en dessous du module, c'est-à-dire plus proche du pied d'ampoule; elles sont donc plus courtes. La courbure des languettes de contact peut aussi varier en fonction de la lampe considérée.The Figures 4 and 5 show that the space between the fixing system 20 and the high voltage module 3 of a lamp D1 is lower than that between the fixing system and the high voltage module of a lamp D2. In addition, the module of a lamp D1 has a square shape whose base has dimensions greater than the diameter of the fastening system. On the contrary, the base of the module of the lamp D2 has a diameter smaller than that of the fixing system. The contact tabs therefore have different dimensions in the case of a lamp system D1 and a lamp system D2. In particular, the contact tabs for lamp D2 are longer than the contact tongues for lamp D1, since they come into contact with the module itself. On the contrary, the contact tabs for a lamp D1 come into contact with a part situated below the module, that is to say closer to the bulb foot; they are therefore shorter. The curvature of the contact tongues may also vary depending on the lamp considered.

Le système de fixation de l'invention est donc identique pour des lampes D1 et pour des lampes D2, excepté l'anneau flexible qui peut présenter des longueurs de languettes différentes. Comme on le comprendra par la suite, cette différence n'est pas gênante, dans le sens où elle ne gêne en rien l'interchangeabilité des lampes.The fastening system of the invention is therefore identical for lamps D1 and for lamps D2, except for the flexible ring which may have different lengths of tongues. As will be understood later, this difference is not troublesome, in the sense that it does not interfere with the interchangeability of the lamps.

Quelle que soit la lampe, D1 ou D2, le système de fixation est positionné et fixé selon le procédé suivant : tout d'abord le système de fixation est réalisé en assemblant l'anneau flexible, adapté à une lampe D1 ou à une lampe D2, avec la bague rigide, puis en insérant ce système verticalement sur la partie supérieure de la contrepartie. Le système est alors fixé sur cette contrepartie par des moyens classiques, par exemple, en force, par baïonnettage ou par encliquetage. Le système de fixation peut comporter, dans sa partie située en dessous de l'anneau flexible, des ergots permettant de fixer le système de fixation sur la contrepartie du projecteur.Whatever the lamp, D1 or D2, the fixing system is positioned and fixed according to the following method: firstly the fixing system is made by assembling the flexible ring, adapted to a lamp D1 or a lamp D2 , with the rigid ring, then inserting this system vertically on the upper part of the counterpart. The system is then fixed on this counterpart by conventional means, for example, in force, bayonet or snap. The fixing system may comprise, in its part located below the flexible ring, lugs for fixing the fastening system on the counterpart of the projector.

Dans le cas d'une lampe D1, la lampe est positionnée sur le système de fixation en plaçant l'ampoule à décharge à l'intérieur de la contrepartie, dans un logement en forme de V de la contrepartie. La position de la lampe D1 dans le système de fixation est correcte lorsque la languette de positionnement est en appui contre la lampe D1, poussant ladite lampe au fond du logement en V. Lorsque la lampe D1 est correctement insérée dans le système de fixation, le système de fixation est mis en position verrouillée par baillonettage, c'est-à-dire par une rotation de la bague rigide autour de l'axe XX' et donc une rotation de la bague rigide par rapport à l'anneau flexible.In the case of a lamp D1, the lamp is positioned on the fastening system by placing the discharge bulb inside the counterpart, in a V-shaped housing of the counterpart. The position of the lamp D1 in the fixing system is correct when the positioning tab is resting against the lamp D1, pushing said lamp at the bottom of the V-shaped housing. When the lamp D1 is correctly inserted into the fixing system, the fixing system is placed in the locked position by gating, that is to say by a rotation of the rigid ring about the axis XX 'and therefore a rotation of the rigid ring relative to the flexible ring.

Dans le cas d'une lampe D2, l'ampoule à décharge est placée à l'intérieur de la contrepartie, le pied d'ampoule étant positionné sur le système de fixation. La position de la lampe D2 dans le système de fixation est correcte lorsque la lampe se trouve dans le logement en forme de V de la contrepartie et que la languette de positionnement est en appui contre la lampe D2, poussant celle-ci au fond du logement en V. Lorsque l'ampoule de la lampe D2 est correctement insérée dans la contrepartie, le système de fixation est mis en position verrouillée par baillonettage, c'est-à-dire par une rotation de la bague rigide autour de l'axe XX' et donc une rotation de la bague rigide par rapport à l'anneau flexible. Le module haute tension peut alors être mis en place sur le pied d'ampoule.In the case of a lamp D2, the discharge bulb is placed inside the counterpart, the bulb foot being positioned on the fixing system. The position of the lamp D2 in the fastening system is correct when the lamp is in the V-shaped housing of the counterpart and the positioning tab bears against the D2 lamp, pushing it to the bottom of the V-shaped housing. When the bulb of the lamp D2 is properly inserted into the counterpart, the fastening system is put in the locked position by gagging, that is to say by a rotation of the rigid ring about the axis XX 'and therefore a rotation of the rigid ring relative to the flexible ring. The high voltage module can then be put in place on the bulb foot.

La languette de positionnement est une lame ressort qui permet de pousser la lampe au fond du logement en forme de V réalisé dans la contrepartie. Le rôle de cette languette de positionnement est de rattraper les jeux qu'il peut y avoir entre la lampe et la contrepartie en poussant la lampe radialement dans le logement en V aménagé dans la contrepartie. Pour cela, la languette de positionnement est placée radialement à l'opposé du V. La bague rigide, lorsqu'elle est mise en position verrouillée, a un ergot qui pousse la languette de positionnement vers le centre du système, poussant la lampe radialement de façon à ce qu'elle soit calée dans le logement en forme de V de la contrepartie.The positioning tab is a spring blade that pushes the lamp at the bottom of the V-shaped housing made in the counterpart. The role of this positioning tab is to make up the games that can be between the lamp and the counterpart by pushing the lamp radially into the V housing arranged in the counterpart. For this, the positioning tab is placed radially opposite the V. The rigid ring, when placed in the locked position, has a lug which pushes the positioning tab towards the center of the system, pushing the lamp radially from so that it is wedged into the V-shaped housing of the counterpart.

La languette de positionnement peut aussi servir de détrompeur, lors du montage de la lampe sur la contrepartie, c'est-à-dire qu'elle offre une seule position possible lors du montage.The positioning tab can also be used as a polarizer, when mounting the lamp on the counterpart, that is to say, it offers a single position possible during assembly.

Lorsque la lampe est montée dans la contrepartie, les languettes de maintien viennent alors maintenir la lampe dans cette position.When the lamp is mounted in the counterpart, the holding tabs then maintain the lamp in this position.

Sur les figures 6A et 6C, on a représenté des vues de coté en coupe du système de fixation de l'invention, dans le cas d'une lampe D1, lorsque le système est, respectivement, déverrouillé et verrouillé. Les figures 6B et 6D représentent des vues de dessus du système de fixation de l'invention, dans le cas d'une lampe D1, lorsque le système est, respectivement, déverrouillé et verrouillé. Les figures 6A et 6B montrent la position de la bague rigide 21 et de l'anneau flexible 31 lorsque le système est déverrouillé. En particulier, elles montrent la position des premiers ergots 22a, 22b, 22c de la bague rigide par rapport aux languettes de maintien 32a, 32b, 32c de l'anneau flexible. Ces figures montrent également la position du second ergot 28 par rapport à la languettes de positionnement 38 de l'anneau flexible 31. En position déverrouillée, la languette de positionnement 38 est logée dans un logement du pied d'ampoule, mais elle est en biais dans ce logement. Le verrouillage du système permet à cette languette d'exercer une poussée radiale sur la lampe afin de pousser la lampe au fond du logement en forme de V de la contrepartie. Ce logement en V est représenté sur la figure 6B par deux méplats 40 situés, radialement, à l'opposé du logement 39 recevant la languette de positionnement 38. Ces figures 6A et 6B montrent aussi le positionnement des languettes de contact 33, entre les languettes de maintien 32. On peut ainsi voir aisément les différences de taille qu'il peut y avoir entre les différentes sortes de languettes.On the Figures 6A and 6C sectional side views of the fastening system of the invention are shown in the case of a lamp D1 when the system is unlocked and locked, respectively. The Figures 6B and 6D represent top views of the fastening system of the invention, in the case of a lamp D1, when the system is, respectively, unlocked and locked. The Figures 6A and 6B show the position of the rigid ring 21 and the flexible ring 31 when the system is unlocked. In particular, they show the position of the first lugs 22a, 22b, 22c of the rigid ring relative to the retaining tabs 32a, 32b, 32c of the flexible ring. These figures also show the position of the second lug 28 relative to the positioning tongues 38 of the flexible ring 31. In the unlocked position, the positioning tongue 38 is housed in a housing of the bulb foot, but it is angled in this accommodation. Locking the system allows this tab to exert a push radial on the lamp to push the lamp to the bottom of the V-shaped housing of the counterpart. This V-shaped housing is represented on the Figure 6B by two flats 40 located radially opposite the housing 39 receiving the positioning tab 38. Figures 6A and 6B also show the positioning of the contact tongues 33, between the tongues 32 holding. We can easily see the differences in size that can be between the different kinds of tabs.

Les figures 6C et 6D représentent le système de fixation dans le cas d'une lampe D1, lorsque le système est verrouillé. On comprend, en regardant les figures 6C et 6D par comparaison avec les figures 6A et 6B que, lorsque la bague rigide est dans la position déverrouillée, les premiers et le second ergots de la bague n'appuient sur aucune languette. Par contre, lorsque l'on fait subir une rotation de la bague rigide, d'environ 40°, par rapport à l'anneau flexible, les premiers ergots 22 viennent se placer devant les languettes de maintien 32 et le second ergot 28 devant la languette de positionnement 38. Le placement de ces ergots peut se faire de façon ordonnée, c'est-à-dire que le second ergot 28 se place avant les premiers ergots 22. Cette rotation de la bague rigide a pour conséquence de pousser les languettes de maintien vers le pied d'ampoule, rendant l'anneau flexible totalement circulaire. Cela a aussi pour conséquence de pousser la languette de positionnement au fond de son logement 39, lui permettant d'exercer une pression plaquant la lampe D1 dans le logement en V.The Figures 6C and 6D represent the fixing system in the case of a lamp D1, when the system is locked. We understand, by looking at Figures 6C and 6D compared with Figures 6A and 6B that when the rigid ring is in the unlocked position, the first and the second lugs of the ring do not bear on any tongue. On the other hand, when the rigid ring is rotated about 40 ° with respect to the flexible ring, the first lugs 22 are placed in front of the holding tongues 32 and the second lug 28 in front of the positioning tab 38. The placement of these pins can be done in an orderly manner, that is to say that the second lug 28 is placed before the first lugs 22. This rotation of the rigid ring has the effect of pushing the tabs holding down to the bulb foot, making the flexible ring completely circular. This also has the effect of pushing the positioning tab at the bottom of its housing 39, allowing it to exert a pressure plating the lamp D1 in the housing V.

La bague rigide 21 agit ainsi comme une came sur l'anneau flexible 31.The rigid ring 21 thus acts as a cam on the flexible ring 31.

Les figures 7A et 7C représentent des vues de coté, en coupe, du système de fixation de l'invention, dans le cas d'une lampe D2, lorsque le système est, respectivement, déverrouillé et verrouillé. Les figures 7B et 7D représentent des vues de dessus du système de fixation de l'invention, dans le cas d'une lampe D2, lorsque le système est, respectivement, déverrouillé et verrouillé. Les figures 7A et 7B montrent la position de la bague rigide 21 et de l'anneau flexible lorsque le système est déverrouillé. En particulier, elles montrent la position des premiers ergots 22a, 22b, 22c de la bague rigide par rapport aux languettes de maintien 32a, 32b, 32c de l'anneau flexible. Ces figures montrent également la position du second ergot 28 par rapport à la languettes de positionnement 38 de l'anneau flexible 31. En position déverrouillée, la languette de positionnement 38 est logée dans un logement du pied d'ampoule, mais elle est en biais dans ce logement.. Le verrouillage du système permet à cette languette d'exercer une poussée radiale sur la lampe afin de pousser la lampe au fond du logement en forme de V de la contrepartie. Ce logement en V est représenté sur la figure 7B par deux méplats 40 situés, radialement, à l'opposé du logement 39 recevant la languette de positionnement 38. Ces figures 7A et 7B montrent aussi le positionnement des languettes de contact 33, entre les languettes de maintien 32. On peut ainsi voir aisément les différences de taille qu'il peut y avoir entre les différentes sortes de languettes.The Figures 7A and 7C are side views, in section, of the fixing system of the invention, in the case of a lamp D2, when the system is, respectively, unlocked and locked. The Figures 7B and 7D are top views of the fastening system of the invention, in the case of a lamp D2, when the system is, respectively, unlocked and locked. The Figures 7A and 7B show the position of the rigid ring 21 and the flexible ring when the system is unlocked. In particular, they show the position of the first lugs 22a, 22b, 22c of the rigid ring relative to the retaining tabs 32a, 32b, 32c of the flexible ring. These figures also show the position of the second lug 28 relative to the positioning tongues 38 of the flexible ring 31. In unlocked position, the positioning tab 38 is housed in a housing of the bulb base, but it is at an angle in this housing .. The system lock allows this tab to exert a radial thrust on the lamp to push the lamp at the bottom of the V-shaped housing of the counterpart. This V-shaped housing is represented on the Figure 7B by two flats 40 located radially opposite the housing 39 receiving the positioning tab 38. Figures 7A and 7B also show the positioning of the contact tongues 33, between the tongues 32 holding. We can easily see the differences in size that can be between the different kinds of tabs.

Les figures 7C et 7D représentent le système de fixation dans le cas d'une lampe D2, lorsque le système est verrouillé. On comprend, en regardant ces figures 7C et 7D par comparaison avec les figures 7A et 7B que, lorsque la bague rigide est dans la position déverrouillée, les premiers et le second ergots de la bague n'appuient sur aucune languette. Par contre, lorsque l'on fait subir une rotation de la bague rigide, d'environ 40°, par rapport à l'anneau flexible, les premiers ergots 22 viennent se placer devant les languettes de maintien 32 et le second ergot 28 devant la languette de positionnement 38. Le placement de ces ergots peut se faire de façon ordonnée, c'est-à-dire que le second ergot 28 se place avant les premiers ergots 22. Cette rotation de la bague rigide a pour conséquence de pousser les languettes de maintien vers le pied d'ampoule, rendant l'anneau flexible totalement circulaire. Cela a aussi pour conséquence de pousser la languette de positionnement au fond de son logement 39, lui permettant d'exercer une pression plaquant la lampe D2 dans le logement en V.The Figures 7C and 7D represent the fixing system in the case of a lamp D2, when the system is locked. We understand, by watching these Figures 7C and 7D compared with Figures 7A and 7B that when the rigid ring is in the unlocked position, the first and the second lugs of the ring do not bear on any tongue. On the other hand, when the rigid ring is rotated about 40 ° with respect to the flexible ring, the first lugs 22 are placed in front of the holding tongues 32 and the second lug 28 in front of the positioning tab 38. The placement of these pins can be done in an orderly manner, that is to say that the second lug 28 is placed before the first lugs 22. This rotation of the rigid ring has the effect of pushing the tabs holding down to the bulb foot, making the flexible ring completely circular. This also has the effect of pushing the positioning tab at the bottom of its housing 39, allowing it to exert a pressure plating the lamp D2 in the housing V.

On comprend alors que, après verrouillage du système, l'anneau flexible 31 assure la tenue mécanique et le positionnement d'une lampe D1 ou D2 sur la contrepartie, ainsi que la continuité électrique et le blindage électromagnétique entre la contrepartie et le module haute tension. Avant verrouillage, il fait fonction de pré-maintien de la lampe car le diamètre intérieur du cercle sur lequel sont réparties les languettes de maintien, en position déverrouillée, est inférieur au diamètre extérieur du culot de la lampe.It is then understood that, after locking the system, the flexible ring 31 ensures the mechanical strength and the positioning of a lamp D1 or D2 on the counterpart, as well as the electrical continuity and the electromagnetic shielding between the counterpart and the high voltage module . Before locking, it acts as a pre-hold of the lamp because the inner diameter of the circle on which the retaining tabs are distributed, in the unlocked position, is less than the outside diameter of the lamp base.

On comprend aussi, d'après la description précédente, que le système est identique pour une lampe D1 et pour une lampe D2, seule la longueur des languettes de contact pouvant être différente. Les languettes de contact peuvent aussi être choisies de façon à avoir un profil similaire pour D1 et pour D2, ce qui permet de simplifier encore la fabrication du système.It is also understood from the previous description that the system is identical for a lamp D1 and for a lamp D2, only the length contact tabs may be different. The contact tabs can also be chosen to have a similar profile for D1 and D2, which further simplifies the manufacture of the system.

De cette façon, le projecteur est standard pour une lampe D1 et pour une lampe D2. Il peut donc être réalisé en grande série, en production, et c'est simplement au moment de l'installation de la source lumineuse que l'on choisit, si besoin est, de prendre un anneau flexible à grandes languettes de contact, pour une lampe D2, ou à petites languettes de contact, pour une lampe D1. On peut ainsi monter une lampe D1 ou une lampe D2, au choix, en fonction du coût et de la disponibilité de l'une ou l'autre des lampes.In this way, the projector is standard for a D1 lamp and for a D2 lamp. It can therefore be realized in large series, in production, and it is simply at the moment of the installation of the light source that one chooses, if need be, to take a flexible ring with large contact tongues, for a D2 lamp, or small contact tabs, for a lamp D1. It is thus possible to mount a lamp D1 or a lamp D2, according to the choice, according to the cost and the availability of one or the other of the lamps.

Claims (11)

  1. Light projection device for a motor vehicle, including:
    - a light source (1, 11) equipped with a discharge bulb (2, 12), with a high-voltage module (3, 13) and with a bulb base (4, 14) providing the link between the bulb and the high-voltage module,
    - a counterpart (9, 19) including a reflector (5, 15) and a lamp holder (8, 18), said lamp holder holding the bulb in front of the reflector,
    - a system (20) for attaching the light source to the counterpart, which system is situated at least partly around the lamp holder, the attachment system including:
    - a rotatably mobile rigid ring (21), and
    - an electrically conductive flexible ring (31) situated inside the rigid ring and equipped with tabs that are in electrical and mechanical contact with the light source,
    the projection device being characterized in that the flexible ring is radially mobile and not rotatably mobile, and said rigid ring (21) is rotatably mobile with respect to the flexible ring (31).
  2. Light projection device according to Claim 1, characterized in that at least one of the tabs is a mechanical holding tab (32).
  3. Light projection device according to either one of Claims 1 and 2, characterized in that at least one of the tabs is an electrical contact tab (33).
  4. Light projection device according to any one of Claims 1 to 3, characterized in that at least one of the tabs is a positioning tab (38) for the light source.
  5. Light projection device according to Claim 4, characterized in that the holding and positioning tabs are radially mobile, with an unlocked position and a locked position.
  6. Light projection device according to any one of Claims 1 to 5, characterized in that the rigid ring includes, on an inner face, at least one first lug (22) able to push the holding tab and to hold it in a locked position.
  7. Light projection device according to any one of Claims 1 to 6, characterized in that the rigid ring includes, on an inner face, at least one second lug (28) able to push the positioning tab and to hold it in a locked position.
  8. Method for attaching a light source to a counterpart of a light projection device according to any one of Claims 1 to 7, including the following steps:
    - positioning and attaching the attachment system (20) around one end of a lamp holder of the counterpart (9, 19), the attachment system comprising a rotatably mobile rigid ring (21) and an electrically conductive flexible ring (31) that is situated inside the rigid ring and equipped with tabs and radially mobile and not rotatably mobile,
    - inserting a discharge bulb (2, 12) of the light source into the inside of the counterpart until a bulb base of the light source bears on the attachment system or the counterpart (9, 19),
    - locking the attachment system by rotating a part of said system.
  9. Attachment method according to Claim 8, characterized in that the locking of the attachment system consists in rotating the rigid ring with respect to the flexible ring and to the counterpart.
  10. Attachment method according to Claim 8 or 9, characterized in that the attachment system is attached to the lamp holder using force, by snap-fitting and locking.
  11. Motor vehicle, characterized in that it includes at least one light projection device according to any one of Claims 1 to 7.
EP04292699.8A 2003-11-21 2004-11-15 Device for fixing a light source on a part of an automobile headlamp, and method thereof Expired - Lifetime EP1533563B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0313650 2003-11-21
FR0313650A FR2862744B1 (en) 2003-11-21 2003-11-21 SYSTEM FOR FIXING A LIGHT SOURCE ON A COUNTERPART OF A MOTOR VEHICLE PROJECTOR AND METHOD FOR CARRYING OUT SAID METHOD

Publications (2)

Publication Number Publication Date
EP1533563A1 EP1533563A1 (en) 2005-05-25
EP1533563B1 true EP1533563B1 (en) 2018-04-25

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Application Number Title Priority Date Filing Date
EP04292699.8A Expired - Lifetime EP1533563B1 (en) 2003-11-21 2004-11-15 Device for fixing a light source on a part of an automobile headlamp, and method thereof

Country Status (4)

Country Link
US (1) US7241042B2 (en)
EP (1) EP1533563B1 (en)
JP (1) JP4554339B2 (en)
FR (1) FR2862744B1 (en)

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FR2880674B1 (en) * 2005-01-07 2007-03-16 Valeo Vision Sa SYSTEM FOR FIXING A LAMP ON A PROJECTOR LAMP DOOR FOR A MOTOR VEHICLE
US20060291216A1 (en) * 2005-06-14 2006-12-28 Blumel Daniel M Apparatus for reducing in size an igniter circuit and assembly
KR100726168B1 (en) 2005-11-08 2007-06-13 현대자동차주식회사 Bulb holder unit for vehicle
FR2895063A1 (en) * 2005-12-20 2007-06-22 Valeo Vision Sa PROJECTOR LAMP DOOR EQUIPPED WITH CLIPS ORIENTED TANGENTIALLY WITH RESPECT TO THE WALL OF THE LAMP DOOR
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JP5368880B2 (en) * 2009-05-29 2013-12-18 株式会社小糸製作所 Vehicle lighting
AT513724B1 (en) * 2012-12-10 2014-09-15 Zizala Lichtsysteme Gmbh Device for fixing a lamp

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JP3126640B2 (en) * 1995-08-25 2001-01-22 株式会社小糸製作所 Bulb fixing structure for vehicle lighting
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Also Published As

Publication number Publication date
US20050111230A1 (en) 2005-05-26
JP4554339B2 (en) 2010-09-29
JP2005158738A (en) 2005-06-16
FR2862744A1 (en) 2005-05-27
US7241042B2 (en) 2007-07-10
FR2862744B1 (en) 2006-09-29
EP1533563A1 (en) 2005-05-25

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