FR2742106A1 - HEADLIGHT FOR VEHICLES - Google Patents

Abstract

The headlight comprises a reflector (12) mounted on a fixing (10) to be able to pivot about an axis (30), and at least one adjustment screw to rotate the reflector (12) on the axis (30), the screw (46) mounted on the fixing (10) to pivot on its axis without sliding longitudinally, engages an internal thread (40) disposed on the reflector (12). The thread is formed on an open threaded shell (40) on the reflector (12) and the screw (46) is mounted on the fastener (10) so as to be held without radial prestressing.

Description

State of the art.

  The invention relates to a headlight for vehicles with

  a reflector mounted on a fixing, so that it can pivot

  ter around at least one axis, and at least one adjustment screw by means of which the reflector can pivot around at least one axis, a screw which is mounted on the fixing so as to be able to

  pivot around its longitudinal axis, but without being able to

  However, slide in the direction of its longitudinal axis and which

  engages an internal thread disposed on the reflec-

0lor.

  Such a headlight is known from document EP 0 224 739 A1. This headlight has a reflector which is mounted on a fixing so as to be able to pivot around at least one axis. To adjust the headlight, an adjustment screw is provided which is mounted so that it can rotate on the binding, but without being able to slide axially, this screw being in

  taken with an internal thread of the reflector. The internal thread

  The inside of the reflector is made up of a threaded bore

  placed on a flange extending from the reflector and closed on

  its perimeter. In the case of a pivoting reflector provo-

  qué by the adjustment screw, in this case the adjustment screw is pivoted at the same time, which constitutes an articulated connection of the adjustment screw with the fixing. When mounting the headlight, the adjusting screw must also be turned in the threaded bore until the reflector is correctly adjusted, which takes a long time. In addition, it is necessary, to manufacture the threaded bore on the reflector, to provide a

  additional machining sequence.

Advantages of the invention.

  The headlight according to the invention is characterized in that the internal thread consists of an open threaded shell on the reflector and the adjusting screw is mounted on

  fixing, in such a way that it is kept under pre-

  roughly radial direction in the direction of

  the axis, resting in the threaded shell.

  This headlight according to the invention has, compared to the state of the art, the advantage that the adjusting screw can be

  rigidly mounted on the binding, because it does not

  vote it with the reflector as a result of the connection with

  the open convex surface of the thread. In addition, the retaining screw

  glage can first be mounted without thread connection with the

  reflector, and the connection with thread need not be made

  only to make the correct adjustment of the reflector. Of

  this way, the headlight is simple to manufacture and assemble.

  According to another characteristic of the invention, the adjustment screw is mounted at its two ends on the binding and is supported in the threaded shell by a threaded rod disposed between its ends. Thanks to this configuration,

  obtains a simple mounting of the adjusting screw on the fixing.

  According to other characteristics of the invention: - the threaded shell consists of a single piece on the reflector; - the threaded shell is fixed, as a separate part to a housing on the reflector; - there are several threaded shells on the reflector or

  housings for threaded shells, in different positions

  annuities, the adjusting screw resting only in a shell

threaded.

  Thanks to this latter arrangement, it is possible to

  tighten the adjusting screw in different preset positions

  defined by the positions of the thread shells, so that the same reflector can be used respectively for different embodiments of the headlight with arrangements

different from the adjusting screw.

  According to other characteristics of the invention

  tion: - the adjusting screw is placed in the mounting position of the

  headlight on the vehicle so that its longitudinal axis

  nal extends approximately vertically and perpendicular to the axis; - the threaded shell is arranged in the region of the horizontal median plane of the reflector; - On the two sides near the area of the top of the reflector, there is respectively a threaded shell; - the adjusting screw is arranged, in the mounting position of the

  headlight on the vehicle, such that its axis longitu-

  dinal extends approximately horizontally and perpendicular-

ment to the axis;

  - the threaded shell is placed in the area of a meteorological plane

  vertical dian of the reflector; - above and below the top area of the reflector

  is arranged respectively a threaded shell.

  Drawing. The present invention will be described below, in more detail, from two embodiments shown in the accompanying drawings, in which: FIG. 1 shows a headlight for an automobile in horizontal longitudinal section, according to a first embodiment example, - Figure 2 shows the lighthouse in section along line II-II of Figure 1, and - Figure 3 shows the lighthouse in section along the

  line III-III in Figure 1, according to a second exemplary embodiment

station.

  Description of the exemplary embodiments.

  A lighthouse shown in Figures 1 to 3, for

  vehicle and in particular for a motor vehicle, has a fastener 10 which can be fixed to the body of the vehicle in a manner not shown. On the fastener 10, a reflector 12 has been mounted, so that it can pivot, in the apex area of which is inserted a light source 14 which may be an incandescent lamp or a gas discharge lamp. The fastener 10 has, at its front end, a light exit orifice 16 through which the light reflected by the reflector 12 can exit. This orifice 16 is covered by a covering disc 18, allowing the light to pass, which is fixed on a flange 17 surrounding the light exit orifice 16 of the fixing 10. The covering disc 18 may be made of glass or of material plastic and can be made

  in the form of a smooth disc or present opti-

  by which the light reflected by the reflector 12 is

deflected during its passage.

  The fastener 10 has, on its rear end region

  rière, a section 20 internally constituted in the form of a cy-

  lindre. The reflector 12 has a zone 22 of external shape

  cylindrical upper which is arranged in section 20 of the fastener 10. Between the zone 22 of the reflector 12 and the section 20

  of the fastener 10, a resilient elastic element has been inserted

  square 24 in the form of a ring, which extends over the entire circumference of the reflector 12. The ring 24 is formed in cross section preferably in a round shape. She serves

  on the one hand to seal the interior volume of the headlight deli-

  mapped by the fastener 10, the reflector 12 and the return disc

  cover 18, and on the other hand to the mounting of the reflector 12. In the area 22 of the reflector 12, there is a shoulder 26 which goes all around; this shoulder is turned in one direction

  which will be defined below, in which the reflec-

  tor 12 is pressed into the binding 10. On the shoulder 26 the ring 24 is supported in such a way that it is in

  a predetermined position relative to the reflector 12. The re-

  flector 12 can pivot on the fastener 10 around an axis 30

  extending horizontally in the plane 25 in which is dis-

fitted the ring 24.

  The reflector 12 is fixed by means of a connection to

  snap-on attachment 10. Two arms 32 being diametrically

  trally vis-à-vis leave the area 22 of the reflector 12 in the direction opposite to its driving direction 28, these arms having at their free ends protrusions 34 facing outwards. In section 20 of the binding, there are two

  recesses 36 taking place diametrically opposite one another

  corresponding, recesses in which the arms 32 of the reflector 12 engage by their projections 34. The protrusions 34 of the arms 32 of the reflector 12 and the recesses 36 of the fixing 10 are, in this case, on a horizontal line parallel to

  the axis 30 around which the reflector 12 can pivot.

  The recesses 36 are formed elongated in the vertical direction, to allow movement of the projections 34 in the case of a pivoting of the reflector 12 about the axis

  10 in these. The recesses can for example be made

  shaped in a roughly circular shape, their center being roughly on the axis 30. The edge of the section 20 of the fastener 10 is chamfered in the direction of depression 28 of the reflector 12 in the direction of the recesses 36 , to allow

  easy insertion of the reflector 12.

  On the rear face of the reflector 12, opposite its

  reflective inner side, at least one co-

  open threaded keel 40. The open threaded shell 40 can be made in one piece with the reflector 12, which

  is then preferably made of plastic or metal.

  tal (cast iron or light metal) by injection. Alternatively, the threaded shell 40 can also be fixed as a separate piece on a housing 42 of the reflector 12, and the shell can be made of plastic while the reflector 12 is made of material.

  plastic or metal. The threaded shell 40 has a thread-

  internal stage and extends over less than half the circumference, the threaded shell 40 deviating, by its open side, from the rear side of the reflector 12 and from the axis 30 around which one can

  rotate the reflector 12. The threaded shell 40 is

  wedged on the reflector 12 with respect to the region of its apex and is disposed at least approximately in the region of a median horizontal plane 44 of the reflector 12. The longitudinal axis

  of the threaded shell 40 extends approximately perpendicular-

  ment to the optical axis 13 of the reflector 12 and to the axis 30, and in this case extends a little above and a little below the

  median plane 44, vertically.

  In the threaded shell 40, an adjustment screw 46 is mounted by its threaded rod 48. The adjustment screw 46 can be rotated on the fastener 10 at its two ends, around its longitudinal axis 47; screw 46 is however mounted

  so as not to be able to rotate in the direction of its longitu-

  dinal 47. In the case of the first exemplary embodiment represented

  felt in FIGS. 1 and 2, the adjusting screw 46 is arranged on the binding in such a way that its longitudinal axis 47

  extends approximately vertically and tangentially relative to

  port to axis 30 around which the reflector can be pivoted

  tor 12. The threaded shell 40 is also arranged correspondingly on the reflector 12, in such a way that its longitudinal axis, which coincides at least approximately.

  with that of the adjustment screw 46, extends approximately vertically

lement.

  The adjusting screw 46 has, at its end

  upper, a head 50 which is formed to allow the ve-

  naked in the grip of a tool, for example by a slot, a slot

  cruciform, a male hexagon or a female hexagon. A reason

  annular groove 51 is connected, in the direction of the threaded rod 48, to the head 50 of the adjusting screw 46, and the adjusting screw 46 has a tenon 52 at its lower end. The adjusting screw 46 is pushed in from above through an orifice 54 in an upper wall 55 of the fixing 10, and through an orifice 56 in a lower wall 57 of the fixing 10. The tenon 52 of the adjusting screw 46 is disposed, in its final position, in the orifice 56 of the lower wall 57. The head 50 of the adjusting screw 46 rests on the upper wall 55 and at least one snap hook 58 moves away from the wall 55 downwards, snap hook 58 which engages in the annular groove 51 of the adjusting screw 46 and blocks the latter

  in the direction of its longitudinal axis 47.

  In its final position, the adjustment screw 46 is arranged on the fastening so that its thread 48 is prestressed in the support of the threaded shell 40 and that a threaded connection is established in this way between the adjustment screw 46 and the reflector 12. The preload of the adjusting screw 46 is, in this case, oriented in the radial direction with respect to the axis 30 around which the reflector 12 can be pivoted. Thanks to the preload of the screw setting

  46, the reflector is not pivoted in this way

  tor 12, but the reflector bears, against the preload of the adjusting screw 46, on the fixing 10 by

  its projections 34 which bear on the edges of the recesses

  ments 36. As a variant, the reflector 12 can also take up

  pui, by noses 38 disposed approximately in its horizontal median plane 44, on a section 39 of the binding 10, to

  against the preload of the adjusting screw 46.

  When mounting the headlight, the reflector 12 is pushed in beforehand, from the rear face of the binding, by its zone 22 on which the ring 24 is mounted, beforehand, in the direction of the arrow 28, in the section 20 of the attachment 10. In this case, the attachment 10 is widened so

  elastic and / or the arms 32 of the reflector 12 are compressed in a

  elastic section, until its projections 34 snap into the recesses 36. Next, the adjustment screw 46 is mounted. The threaded connection of the adjustment screw 46 with the threaded shell 40 takes place in this case only when the tenon 52 of the adjustment screw 46 is introduced into the orifice 56 of the lower wall 57. Previously, the adjustment screw 46 can be moved independently of the reflector 12 in the direction of its longitudinal axis 47. During rotation of the adjustment screw 46 around its longitudinal axis 47, the reflector 12

  pivots around the axis 30, the reflector 12 rolling on the base

gue 24.

  Advantageously, there is a threaded shell 40 on the reflector 12, as shown in FIG. 1, on the two sides of the region of its apex,

  which allows to have an arrangement of the choice of the screw

  glage 46 on both sides of the reflector 12. Insofar as the threaded shell 40 is fixed as a separate piece on the

  reflector 12, the reflector may have correspondingly

  dante, on both sides of the apex area, respectively a housing 42, while however a threaded shell 40 need only be disposed on the housing 42 where the adjusting screw 46 is provided. In this way the reflector 12 can be used with an unmodified shape for different headlights, with a different arrangement of the adjusting screw 46. On the fixing 10, two orifices 54 or 56 can also be provided correspondingly respectively in its walls 55 or 57,

  in such a way that the retaining screw can be placed on it

  glage 46 in different positions. However, we can also

  use for each realization of the lighthouse, a particular fixing

  ridge 10 on which the retaining screw cannot then be placed

  glage 46 only in one position.

  In Figure 3, the lighthouse is shown in a

  second example of construction in which the construction

  damentale of the headlight is not modified compared to the first embodiment, however the adjusting screw 146 is arranged so that its longitudinal axis 147 extends tangentially to the axis 30 around which the reflector 112 can be pivoted , and the latter extends roughly horizontally or extends slightly inclined in the direction of depression 28 of the reflector 112. The adjustment screw 146 is in this case arranged so that its threaded rod 148 is oriented roughly in the driving-in direction 28 of the reflector 112. The adjusting screw 146 is disposed in a vertical direction relative to the region of the top of the reflector

  112, for example as shown in FIG. 3, below

  under or above reflector 112. On the rear face of the reflector 112, there is, on its lower zone

  edge, the open threaded shell 140 which can be

  in one piece on the reflector 112 in the case of the first embodiment or can be fixed thereon

  as a separate part on a housing 142. The shell fi-

  the strip 140 is arranged in such a way that its longitudinal axis extends at least approximately in the vertical median plane of the reflector 112 and extends approximately tangentially to

  the axis 30. The adjusting screw 146 is housed by its anterior tenon

  laughing 152 in an orifice 160 on a wall 161 which projects downwards from the flange 117 of the binding 110. At its other end, the adjusting screw 146 is housed

  in a recess 163 of a wall 164 of the binding 110 available

  placed perpendicular to its longitudinal axis 147, which engages in the annular groove 151 of the adjusting screw 146

  and locks the adjustment screw 146 in the direction of its long axis

  tudinal 147. The adjusting screw 146 is arranged in the orifice and the housing 163 is arranged, so that it is held under preload, obliquely upward, in

  being oriented in the radial direction with respect to the axis 30 in ap-

  then in the threaded shell 140. Contrary to the precon-

  tail of the adjustment screw 146, the reflector 112 rests on the fastener 110 by means of the ring 24 and

  projections 34 of its arms 32 in the recesses 36, in such a way

  Less than the preload of the adjustment screw 146 does not cause the reflector 112. to pivot.

  adjusting screw 146 around its longitudinal axis 147, the

  flector 112 pivots around axis 30, rolling by

  through ring 24 in section 20 of the fixa-

  tion 110. Advantageously, on the lower border zone and on the upper border zone, the

  flector 112, respectively a threaded shell 140 or a housing 142 for a threaded shell 140, so that

  the adjustment screw 146 can be arranged either at the top or at the bottom with a single embodiment of the reflector 112. The two embodiments described above of the headlight can also be combined with each other so that are arranged on the reflector as well the two file shells

  lateral tees 40 or the housings 42, that the threaded shells 140 being on the lower border zone and the upper border zone, or the housings 142. With this configuration, it is possible, with a single embodiment of the reflector, to have great flexibility in the arrangement of

the adjustment screw on the headlight.

Claims (11)

R E V E N D I C A T I ONS   1) Headlight for vehicles with a reflector (12, 112) mounted on a fixing (10, 110) so as to be able to pivot around at least one axis (30), and at least one adjustment screw (46, 146) thanks to which the reflector (12, 112) can pivot around at least one axis (30), a screw which is mounted on the fixing (10,) so as to be able to pivot around its longitudinal axis (47, 147) but without being able however to slide in the direction of its longitudinal axis (47, 147), and which engages with an internal thread (40, 140) disposed on the reflector (12, 112), characterized in that   the internal thread is formed on a threaded shell or-   green (40, 140), on the reflector (12, 112) and the retaining screw   glage (46, 146) is mounted on the fastening (10, 110) in such a way that it is held under prestress in the roughly radial direction towards the axis (30), bearing in the threaded shell (40, 140).   2) headlight according to claim 1, characterized in that the adjusting screw (46, 146) is mounted at its two ends   on the fixing (10, 110) and is supported in the fixed shell   lined (40, 140) by a threaded rod (48, 148) disposed between its ends.   3) headlight according to claim 1 or 2, characterized in that the threaded shell (40, 140) consists of a single piece on the reflector (12, 112).   4) Lighthouse according to claim 1 or 2, characterized in that   the threaded shell (40, 140) is fixed as a separate part   connected to a housing (42, 142) on the reflector (12, 112).    ) Lighthouse according to claim 3 or 4, characterized in that   several shells are arranged on the reflector (12, 112)   strips (40, 140) or housings (42, 142) for file shells   tees, in different positions, the adjusting screw (46,   146) resting only in a threaded shell (40, 140).   6) Lighthouse according to one of the preceding claims,   characterized in that the adjusting screw (46) is arranged in the mounting position   of the headlight on the vehicle in such a way that its axis   dinal (47) extends approximately vertically and perpendicular- ment to the axis (30).   7) Lighthouse according to claim 6, characterized in that   the threaded shell (40) is arranged in the region of the meteor plane   horizontal dian (44) of the reflector (12).   8) headlight according to claim 6 or 7, characterized in that on both sides near the area of the top of the reflector (12)   respectively has a threaded shell (40).   9) headlight according to one of claims 1 to 5,   characterized in that the adjusting screw (146) is arranged in the mounting position of the   headlight on the vehicle, so that its longitudinal axis   nal (147) extends roughly horizontally and perpendicular to rement to the axis (30).   10) headlight according to claim 9, characterized in that the threaded shell (140) is arranged in the region of a plane   vertical median (45) of the reflector (112).   11) Lighthouse according to claim 9 or 10, characterized in that above and below the area of the top of the reflector   (112) is respectively disposed a threaded shell (140).