FR2713746A1 - Headlight for vehicles, comprising a diaphragm partially surrounding the light source. - Google Patents

Abstract

Headlight for vehicles with a reflector (10), in which a light source (12) is placed and with a diaphragm (29) which partially surrounds the light source (12) and comprises at least one support (32, 33), which passes through an opening (24, 25) in the reflector (10) and is fixed on the external side of the reflector (10) to hold the diaphragm (29), headlight characterized in that on the end part, passing through the opening (24) towards the external side of the reflector (10), of the support or supports (32) engages under elastic prestressing a holding element (42, 52) by means of which the diaphragm (29) is pulled against a defined support (40) on the reflector (10), and in that the support (s) (32) is (are) in cross section with respect to the direction of fitting (28) of the diaphragm (29) a form of hollow profile.

Description

"Headlight for vehicles, comprising a diaphragm partially surrounding

the light source *

State of the art.

  The invention starts from a headlight for vehicles with a reflector, in which is placed a light source and with a diaphragm which partially surrounds the light source and comprises at least one support, which passes through an opening in the reflector and is fixed on

  the outer side of the reflector to hold the diaphragm.

  Such a lighthouse is known from the document

  DE 26 22 365 Al. This lighthouse has a reflector in the-

  what is a light source. He is in-

  be provided a diaphragm which partially surrounds the light source and which comprises two supports, which protrude through slots in the reflector and which serve to

  maintain the diaphragm. The supports are, in cross section

  versal with respect to the direction of placement of the dia-

  phragm, produced in the form of flat profiles and the terminal zones of which project through the slots

  are twisted against the reflector to fix the slide

  phrase. As the supports necessarily pass with play to

  through the slits, and that it is not certain that the zo-

  nes terminals of the supports are sufficiently strongly twisted, so that they bear against the reflector, it is not certain in the case of this type of fixing of the diaphragm on the reflector that the latter is maintained from

  sure and in an exact position on the reflec-

tor.

Advantages of the invention.

  The invention provides that on the terminal part, passing through the opening towards the external side of the reflector, of the support or supports, engages under elastic prestressing a holding element by which

  the diaphragm is pulled against a defined support on the re-

flector.

  The lighthouse according to the invention comprising these characteristics

  has the advantage that the diaphragm is main-

  held by the elastic retaining element in a certain manner

  and in the exact position required on the reflector.

  Advantageous embodiments of the

  elements of the invention are the subject of other characteristics

  ques of the invention. In the plastic reflectors which are produced by injection molding, only relatively large openings can be created during this molding. Under these conditions, it is advantageous to produce the support or supports of the diagram in the form of a hollow profile, since the latter can on the one hand be securely housed in a large opening of the reflector and moreover has a high rigidity for a weight which is at the same time reduced. By realizing the support of

  so that it is elastically compressible transverse-

  in relation to the direction of implementation of the di-

  phragm, this support can be compressed elastically as it passes through the opening, so that it is kept without play in this opening. The arrangement of the retaining element on the retaining ring offers the advantage of simple mounting, especially when several supports are provided for which a single retaining ring

  is necessary with elastic tabs in nom-

  bre equal to that of the supports. Providing that the retaining ring can be placed on the flange approximately parallel to the longitudinal extension of the support

  and that its tongue can be brought into engagement on the support

  worn by rotation of the retaining ring on the adhesive-

  rette, simple mounting of the retaining ring is made possible. The retaining ring can advantageously be used at the same time to hold an elastic stirrup for fixing the light source in the reflector, so that no additional components are necessary to

this effect.

Drawings.

  An exemplary embodiment of the invention is shown

  presented on the attached drawings and will be exposed more

  in detail in the description below.

  The figures show: - Figure 1, a headlight for sectional vehicles

longitudinal horizontal.

  - Figure 2, the lighthouse in partial rear view

  in the direction of arrow II in Figure 1.

  - Figure 3, a diaphragm of the headlight of the

  gure 1 along a longitudinal line along line II

  in Figure 1 and on a larger scale.

  - Figure 4, the diaphragm seen in the direction-

  tion of arrow IV in FIG. 3.

  - Figure 5, a lighthouse holding ring of Figure 1 seen on a larger scale in the direction of

arrow V in Figure 1.

  - Figure 6, the retaining ring according to a

  section along line VI-VI in Figure 5.

  - Figures 7 to 8, the partial views of the year-

  support in the direction of the arrows VII or else

VIII in Figure 5.

  - Figure 9, a section of the lighthouse along the line

IX-IX in Figure 2.

  Description of the exemplary embodiment.

  A headlight for vehicles, for example vehicles

  automobiles, shown in Figures 1 and 2 includes a reflector 10 in which is placed a light source 12 which may be an incandescent lamp or a gas discharge lamp. The reflector 10 can

  be arranged in an adjustable manner in a casing 14 the opening of which

  the light output is closed by a glass

  transparent cover 16. The reflector 10 is constituted

  killed in synthetic material, for example in synthetic material

  thermosetting tick, and it is made by injection molding. The reflector 10 has in its apex zone 18 an opening 20 through which passes from the rear side of the reflector the part of the light source 12 in which is placed its luminous body, coiled filaments or else discharge arcs. Cross section

  of the opening 20 is adapted to the light source 12 used

  read, while a base 13 of the light source 12

  comes according to the direction of installation of the source lu-

  miner 12 (direction of arrow 15), apply against the rear side of the reflector 10. On the rear side of the reflector 10 is disposed a flange 22 surrounding

  the opening 20 and which is integral with the reflective

  tor 10. The reflector 10 has in its crown area 18 two other openings 24, 25 which are arranged on a

  periphery somewhat larger than that of the glue

  rette 22 and which have a quadrangular cross-section

  laire. As the reflector 10 is made of material

  synthetic, it has a relative wall thickness

  important and the openings 24, 25 are shrinking

  tapering conically towards the rear side of the reflector 10,

  among other things, this is due to technical manufacturing reasons

  cation. The opening 24 is roughly arranged horizontally-

  next to the opening 20 for the light source 12

  and the opening 25 is arranged a little lower than the opening

  ture 20 next to it. In the area of the openings 24,

  the flange 22 is interrupted, that is to say not re-

presented.

  In the reflector 10 there is set up a diaphragm

  phragm 29 from its anterior face in the direction of arrow 28, diaphragm 29 which partially surrounds the

  light source 12 or more precisely its part extends

  dant through the opening 20. Thanks to the diaphragm 29 part of the light emitted by the light source 12 is masked. The diaphragm 29 can be used to essentially mask only the light emitted by the light source 12 directly towards the covering glass 16

  or also to constitute with its border of limi-

  tation, a chiaroscuro limit of the light beam coming out

so much from the lighthouse.

  The diaphragm presented in detail in FIGS. 3 and 4 comprises a pot-shaped part 31, which

  partially surrounds the light source 12, and two sup-

  ports 32, 33 extending from this pot-shaped part towards the reflector 10 in the direction of installation 28. The diaphragm 29 is made of sheet metal and is formed there by stamping and then folding. Supports 32, 33

  are connected to the pot-shaped part 31 by means of

  diary of crosspieces 35 and in their free end zone, seen in cross section with respect to the direction of installation 28, they are folded to form a hollow profile. A chiaroscuro limit of the light beam leaving the headlight can be obtained thanks to the limiting borders

  of the pot-shaped part 31 or else of the crosspieces 35.

  If the chiaroscuro limit is to be obtained by the limiting edges of the crosspieces 35, these edges are arranged

  so that the chiaroscuro limit takes the necessary position

  to be. The supports 32, 33 and the corresponding openings

  your 24, 25 are also appropriately arranged.

  In the case of the embodiment, the supports 32, 33 as shown in Figure 4 are folded to form a quadrangular hollow profile. But it is however possible to fold them to form a profile

  any hollow, for example polygonal or round. The sup-

  ports 32, 33 are in cross section folded transversely with respect to the direction of installation 28, but not for

  constitute a completely closed first hollow, and

  still try a slot 36. Thanks to this slot 36 the sup-

  ports 32, 33 can be compressed elastically transversely to the direction

  28. The supports 32, 33 extend laterally.

  lement beyond the pot-shaped part 31 and their sec-

  cross section is reduced conically in the direction of installation 28. At the transition between the supports 32,

  33 and sleepers 35, it is formed on the sides

  in front of the supports 32, 33 a step 38 facing

  the reflector 10. On the free end zones of the supports

  ports 32, 33 it is provided at a certain distance from their ends on a part of their periphery respectively

a cutout 39.

  The diaphragm 29 is placed in the reflector

  tor 10 in the direction of arrow 28, in which case its supports 32, 33 pass through the openings 24, 25 in the reflector 10. In the defined end position

  diaphragm 29, it is applied with respect-

  a step 38 against a projection 40 arranged next to it

  openings 24, 25 on the internal face of the reflector 10.

  In this end position of the diaphragm 29, the free end zones of the supports 32, 33 protrude from the reflector 10 with the cutout 39 on the rear side. The cutouts 39 in the supports 32, 33 are then rotated

  on the flange 22 inwards. The cross-section

  dirty of the openings 24, 25 in the reflector 10 is a little smaller than that of the supports 32, 33, so that these are compressed transversely to the direction of positioning 28 and are then arranged without play in the

  openings 24, 25. The cross-sectional shape of the ou-

  vertices 24, 25 is adapted to that of the supports 32, 33, therefore not necessarily quadrangular, but it can also be polygonal or round. As a retaining element for the diaphragm 29 there is provided a retaining ring 42 which is shown in detail in FIGS. 5 to 8. This retaining ring 42 is placed on the flange 22 from the rear side of the reflector 10 along the direction of the arrow 15. This retaining ring 42 is produced in the form of a part made of

  sheet metal, which is stamped and then folded. The hand ring-

  yours 42 has a zone 43 extending transversely with respect to its direction of installation 15, zone with which it comes into application against a flange 45 on the rear side of the reflector 10 in the direction of installation 15. The retaining ring 42 further includes an edge

  46 taken from zone 43 oriented opposite the re-

  flector 10. From the internal edge of the zone 43 project towards the external envelope of the flange 22 of the tabs 50

  distributed in three locations on the periphery of the year-

  retaining pin 42. In the embodiment at each location there are respectively two catches 50 arranged at a short distance one next to the other. The cleats 50 are cut in a bevel in a peripheral direction and respectively a cleat 50 of two cleats 50 arranged one next to the other is somewhat obliquely placed away from the reflector 10 relative to the area 43 of the 'retaining ring 42. The flange 22 of the reflector 10 comprises, as shown in Figure 2, on its outer shell and distributed on its periphery three ramps 51 deviating outwardly. It is also possible to provide on the retaining ring 42 the tabs on more or less than three locations, in which case the

  corresponding number of ramps 51 is provided on the adhesive-

  rette 22. In addition, from the zone 43 of the retaining ring 4, two tongues 52 are released moving away from the reflector

  and which are susceptible to elastic deformation.

  The free ends of these tabs 52 are as re-

  shown in Figure 6 slightly curved, their curvature

moving away from the reflector 10.

  For its assembly, the retaining ring 42 is pushed according to FIG. 1 in the direction of arrow 15 on the flange 22, and this in a rotational position in which its catches 50 do not come on the ramps

51 on the flange 22.

  The retaining ring 42 is pushed until

  that it is applied by the zone 43 against the flange 45.

  In this position, the retaining ring 42 is rotated so that its tabs 50 with their oblique side arrive on the ramps 51 of the flange 22 and are notched there,

  so that the retaining ring 42 is held on the collar

  lerette 42. Thanks to the slightly oblique position of the ta-

  quets 50, a force pushing it towards the reflector is exerted on the retaining ring 42. In addition, during the rotation of the retaining ring 42, respectively one of these tongues 52 plunges respectively into a cutout 39 on the end zone of the supports 32, 33 and engages on the supports 32, 33 thereby elastically deforming

  on the border zone moving away from the reflector 10 of the

  sections 39 on supports 32.33. As a result, the supports 32, 33 are pulled towards the rear side of the reflector 10 and thus the diaphragm 29 is pulled against the projections 40 on

  the reflector 10, so that the diaphragm 29 is now

  naked in its defined position on the reflector 10. Thanks to the

  free curved ends of the tabs 52, it is

  sure that the tabs can easily sink into

the cuts.

  The retaining ring 42 may, according to a supplement

  advantageous as shown in figure- 9, also serve

  fixing ment for an elastic retaining stirrup 60 intended to fix the light source 12 in the reflector 10. The retaining stirrup for the lamp 60 is for example constituted by an elastic steel wire and it is mounted so as to be able to oscillate at one of its end parts 61 on the retaining ring 42 using a tongue 62 extending outward from the edge 46 of this ring and bent over the lamp holding bracket 60,

  while the other end part 64, free, is suspended

  capable of being hooked to a hook 65 disposed on the edge 46 of the retaining ring 42. The tongue 62 on the retaining ring 42 is also shown on the

  Figure 5 and the hook 65 is shown in the view by-

  Figure 8. The middle zone 67 of the stirrup 60 of

  holding the lamp is bent towards the reflector.

  The light source 12 is, after the mounting of the retaining ring 42, placed in the direction of the arrow

  in opening 20 until it comes to apply

  quer with its base 13 against the rear side of the reflector 10. In this position, the bracket 60 for holding the lamp is tilted on the light source 12 so that its central zone 67 is applied against the base 13 of the source luminous 12 and the free end portion 64 of the stirrup 60 is hooked to the hook 65. The deflection of the central region 67 of the stirrup 60 is then reduced

  resiliently so that the light source 12 is main-

  held without play in the direction of the arrow against the reflective

  tor 10. On the edge 46 of the retaining ring 42 there may also be provided a plug contact 68 shown in the

  figure 7, which serves as a ground contact for the source lu-

  miner 12. The light source 12 is then connected in a

  electrically conductive lesson to the retaining ring 42 by means of its metal base 13 and

  the stirrup 60 engaging thereon.

O10

  The diaphragm 29 previously described may also

  ment be made with only one support 32 or 33 or with more than two supports, in which case there is then provided on the reflector correspondingly a single opening 24 or 25 or even more than two openings. The support (s) 32 or 33 can be arranged in any manner, either laterally next to the opening 20 for the passage of the light source 12, above the latter

  or below it whichever is more

  geux in the case of application considered.

he

Claims (10)

R E V E N D I C A T IONS   1- Headlight for vehicles with a reflector (10), in which a light source (12) is placed and with a diaphragm (29) which partially surrounds the light source (12) and comprises at least one support (32, 33 ),   which passes through an opening (24, 25) in the reflective   tor (10) and is fixed on the external side of the reflector (10) to maintain the diaphragm (29), headlight characterized   in that on the terminal part, passing through the   groove (24, 25) towards the external side of the reflector (10), of the support or supports (32, 33) engages under elastic prestressing a holding element (42, 52) by which the diaphragm (29) is pulled against support   defined (40) on the reflector (10).   2- headlight according to claim 1, characterized in that the support (s) (32, 33) takes on or takes up in cross section with respect to the direction of fitting (28) of the diaphragm (29) a form of hollow profile 3 - Lighthouse according to claim 2 characterized in that the support (s) (32, 33) takes or takes on a conical shape that tapers in the direction of   fitting (28) of the diaphragm (29).   4- headlight according to claim 3 characterized in that the opening (24, 25) for the passage of a support (32, 33) assumes a conical shape which becomes thinner   in the direction of fitting (28) of the diaphragm (29).   - Headlight according to one of Claims 2 to 4 -   characterized in that the support or supports (32, 33)   are elastically compressible transversely compared to   port to the direction of fitting (28) of the diaphragm (29).   6- headlight according to one of claims 2 to 5 ca   characterized in that the support (s) (32, 33) are reali-   in the form of a piece of curved sheet metal.   7. Headlight according to one of the preceding claims.   tes characterized in that the retaining element (52) is disposed on a retaining ring (42) and takes the form of an elastically deformable tongue, which engages on the end part of the support or supports (32, 33) of the diaphragm (29).   8- headlight according to claim 7 characterized in that the reflector (10) has on its outer side a flange (22) on which is placed the retaining ring (42).   9- headlight according to claims 7 or 8 characters   that the support or supports (32, 33) have   in its end zone or have in their end zone   end a notch (39) in which engages the tongue (52).   - Headlight according to claims 8 or 9 charac-   characterized in that the retaining ring (42) can be placed   on the collar (22) roughly parallel to the extension   longitudinal extension of the support (32, 33) while its lan-   watch (52) can be brought into engagement on the support (32,   33) by rotation of the retaining ring (42) on the adhesive- rette (22).   11- headlight according to one of claims 7 to 10   characterized in that the retaining ring (42) is used as a fixing for the elastic retaining clip intended fixing the light source (12).   12- Lighthouse according to one of the preceding claims -   teeth characterized in that the reflector (10) is made killed by synthetic material.   13. Headlight according to one of the preceding claims.   teeth characterized in that the diaphragm (29) has a pot-shaped part (31), to which each support   (32, 33) is connected via a cross member, tan-   say that a chiaroscuro limit of the outgoing light beam   of the lighthouse is obtained by an edge delimiting the tra- pours (35).