FR2555706A1 - PROJECTOR FOR MOTOR VEHICLES, COMPRISING A PRIMARY REFLECTOR, RELATED TO A DEVIATION REFLECTOR - Google Patents

Abstract

A.PROJECTOR FOR MOTOR VEHICLES; B. PROJECTOR CHARACTERIZED IN THAT THE PRIMARY REFLECTOR 10 TAKES THE FORM OF A RECTANGULAR REFLECTOR WITH AN OUTLET OPENING 12 OF WHICH THE TWO SHORT SIDES 14 ARE PARALLEL TO THE MEDIAN VERTICAL LONGITUDINAL PLANE OF THE VEHICLE, THE PRIMARY OUTLET OPENING 12 OF THE REFLECTOR 10 IS ORIENTED UPWARD; C. THE INVENTION CONCERNS HEADLIGHTS FOR MOTOR VEHICLES INCLUDING A PRIMARY REFLECTOR, LINKED TO A DEVIATION REFLECTOR.

Description

i "Headlamp for motor vehicles, incorporating a reflector

  primary, linked to a deflection reflector. "

  The invention relates to a projector for vehicles

  automobiles in which: (a) a primary reflector with a bulb generates a primary light beam, (b) a deflection reflector is arranged on the path of

  beams of the primary light beam and reflects that

  c) a closing window closes the spotlight in the vicinity of

the body of the vehicle.

  US-PS 1 981 328 discloses a projector of this type. The primary ellipsoidal reflector exit aperture is directed downward and the deflection reflector is a part of a paraboloid whose focus

  coincides with the external focus of the primary reflector. Linen-

  of this previously known projector is the accu-

  mulation of heat in the area of the top of the primary reflector

  mayor and the relatively large height of the light beam

directed on the pavement.

  The high temperatures caused by

  mulation of heat in the area of the top do not allow to advantageously use as material for the reflector

  instead of metal, plastic. The relative height

  a large inclination of the light beam, especially for a large inclination of the high-mounted ice-cream car for the passage of light altering the impression 2.

  of the front part of the motor vehicle.

  The object of the invention is to remedy the problems

  my poses in the aforementioned state of the art. This problem

  is solved according to the invention in that the reflec-

  primary body takes the form of a rectangular reflector with

  an outlet opening with two short sides parallel to each other

  the vertical median longitudinal plane of the vehicle, the

  The output of the primary reflector is oriented upwards. Thanks to the exit opening placed towards the

  top of the primary reflector, the heat produced by the ampu-

  it is evacuated, so that there is only one con-

  moderate vexion with the primary reflector and thus the

  its maximum temperature is significantly lower than when the exit aperture of the light is placed

  down or to the side. This creates the condition

  using as materials, the most favorable plastics from the point of view of

  in particular thermoplastics. In addition,

  total smelter, ie the length of construction se-

  the longitudinal axis of the vehicle is reduced by approximately

  one-third of the reflector device with a

  lateral exit opening. Reflectors with an opening

  side exit can not, because of the

  construction smelter required most of the time (ex.

  voltage towards the longitudinal axis of the vehicle), to fully use all the optical resources, which is now possible thanks to the provision

vertical of the primary reflector.

  Other advantageous forms of the invention are characterized in that the reflecting surface of the primary reflector has the form of a paraboloid; the surface

  reflection of the primary reflector has a basic

  bololdale with additional paraboloidal parts or elliptical paraboloidal parts. Providing that the hood is disposed in half of the primary reflector opposite to the direction of movement of the motor vehicle, the

  implementation of a screen that would be an obstacle to evacuation

  heat is no longer necessary.

  In headlamps made with a front exit reflector aperture, the primary light beam is optically transformed on the closing beam into illumination beams of the roadway. This transformation is carried out exclusively by refraction of light. By providing that the optical means are arranged

  on the reflecting surface of the deflection reflector, this

  transformation, that is, the change of direction

  of the primary light beam, does not take place by refraction

  light, but by reflection on a surface. In

  this case, the direction of the primary light beam after

  bending, compared with optically

  with the same opening angle, is much more

  fied. In this way, we can respond more satisfactorily and without loss to the requirements formulated for a distribution with

  a wide dispersion of the lighting beam of the roadway.

  It is also possible to transform the primary light beam into the lighting beam of the

  pavement by a partial reflection on the surface of the

  deviation deflector and complementary refraction by the closure glass. In this case, the optical means of the deflection reflector provide the important changes of direction (deflections), for example the asymmetrical sector.

  code light, and the optical means on the closing ice

  ensure only slight changes of direction

  such as those or only those that limit the view of the ex-

  inside the projector. The harmonization of the means

  hairy and refractory means requires a lot of care.

  The suppression of optical means strongly refracting on

  the closing glass makes it possible to tilt it stronger-

  than previously in the horizontal and / or lateral direction. The vertical arrangement of the primary reflector

  not always possible for many types of vehicles.

  because of lack of space. In such cases, it is possible to provide that the optical axis of the primary reflector is inclined relative to a horizontal in the direction of movement, but preferably opposite to this direction of movement, in including the inclination of the area

  of the top of the primary reflector because, as a result, the reflec-

  deviation machine is closer to the closing ice

  ture and the hood is less of a hindrance to heat dissipation. In this case, the height of the light output remains the same for

  different inclined positions of the reflectors, but the former

  material tension of the surface of the deflection reflector

changes.

  The components of the headlamp are, as in conventional headlamps, mounted in a common box and must be adjustable for basic adjustment and,

  possibly for the adjustment of the lighting width.

  For this purpose, it is advantageous to provide that the elements

  for the vertical adjustment are fixed on the reflector of

  viation; the elements for the horizontal adjustment are arranged on the primary reflector; the elements for the setting of

  vertical and horizontal bases are arranged either on the reflec-

  deviation, either on the primary reflector. The articu-

  preference elements on the deviation reflector.

  relatively light, allows, on the one hand,

  effortlessly, and on the other hand to ensure good access

  the elements by placing them in the upper part of the

  the motor housing. A replacement of the bulb is facilitated by providing that the primary reflector is capable of pivoting out of the bodywork on a

horizontal axis.

  The arrangement of the primary reflector with the

  exit at the top, creates in itself a

5.-

  mined, so that the evacuation of heat

  inside the reflector, is easily

  compared to the conventional projector with a horizontal optical axis

  tal. Simple technical means on the openings of the reflector are sufficient for the protection against projections.

water and dust.

  Two exemplary embodiments of the invention are shown in vertical section in a very amplified manner in the accompanying drawings and are described in more detail.

in the description below:

  - Figure 1 shows a projector with a

  primary deflector arranged vertically,

  - Figure 2 shows a reflector with a

  primary deflector placed obliquely.

  In FIG. 1, a rectangular floodlight placed at the front and to the right of a vehicle to provide both road lighting and code lighting comprises a primary reflector 10 with a paraboloidal reflecting surface 11. and an outlet opening 12 directed upwards, with two long sides 13 and two short sides 14 (one of which is located towards the plane of the figure). Both sides

  14 are parallel to the vertical longitudinal median plane

  vehicle cal, which is behind the plane of the figure parallel to it. On the optical axis 15 and the focus of the reflecting surface 11, there is a road lighting bulb 16, and in front is disposed a bulb 17

  in code with a hood 18 forming the clear boundary

  darkness of the lighting beam in code. This cover is disposed in half 19 of the reflector opposite to the direction of movement, according to the arrow 20, of the vehicle. The primary reflector 10

  provides a primary light beam for the illumination

  in code or for the road lighting represented

  respectively by a radius 16 'or 17'.

  Above the primary reflector 10 and in the path of the beams of the primary illumination light beam of 6.-route 16 ', and of the primary illumination beam in code 17', is disposed a deflection reflector 21 plane (to plane parallel face) inclined 45 relative to the optical axis 15. The

  deflection reflector 21 has in the vicinity of its sur-

  reflective face 23, optical means 22 such as

  lenses, prisms, which transform the light

  respective primary beams in lighting

  17 "radius or road lighting beam according to radius 16". * A transparent closing window 24 closes the headlight in the vicinity of the vehicle body 25,

  having essentially the same inclination and the same

  wire than the adjacent part of the bodywork.

  In the second exemplary embodiment (FIG. 2), elements identical or similar to those already described have the same references as in FIG. 1. An axis 37 is

  disposed on the optical axis 35 and below the primary reflector

  may 30 being perpendicular to the vertical longitudinal median plane. The primary reflector 30 pivots around the axis 37

  arrow 20 in the opposite direction to the movement of the vehicle.

  the optical axis 35 forms with a horizontal

  the 36 at an obtuse angle 38. To maintain the direction of

  17 "lighting code and 16" road lighting beam, the deflection reflector 21

  the horizontal 36 'an acute angle 39 which is half of the year

  38. In a manner not shown, the primary reflector is pivotable in the clockwise direction of a

  shows, out of the bodywork on axis 37.

  A device, not shown, for the basic adjustment of the projector comprises elements (adjustment screws) for vertical adjustment on the deflection reflector 21 and similar elements for horizontal adjustment on the primary reflector. All of these elements can also, optionally, be arranged on the deflection reflector or on

the primary reflector.

  The reflective surface of the primary reflector 7 may, instead of the mentioned paraboloid, also include a paraboloidal base shape and additional paraboloidal portions or paraboloidal-elliptical portions. Similarly, the reflective surface of the deflection reflector, instead of being flat, can also be concave or convex,

  or consist of surfaces forming between them

different grees.

8 -

Claims (11)

  1.- Projector for motor vehicles in which:   (a) a primary reflector with a bulb causes a   primary light beam, (b) a deflection reflector is placed on the path of   beams of the primary light beam and reflects that   (c) a closing window closes the headlamp in the vicinity of the vehicle body, characterized in that:   d) the primary reflector (10, 30) takes the form of a reflec-   rectangular head with an outlet opening (12)   the two short sides (14) are parallel to the longitudinal plane   vertical median tudinal of the vehicle, e) the outlet opening (12) of the primary reflector (10, 30) is facing up.   2. The headlamp according to claim 1,   characterized in that: f) the reflective surface (11) of the primary reflector (10,) is in the form of a paraboloid,   3. Projector according to claim 1,   characterized in that: g) the reflecting surface of the primary reflector has a paraboloidal base shape with paraboloidal portions   additional or elliptical paraboloidal parts ticks.   4.- Projector for the fire code with a   pot constituting the chiaroscuro limit of this code fire,   according to any one of claims 1 to 3, projector characterized in that   h) the hood (18) is disposed in half (19) of the   primary (10, 30) opposed to the direction of travel (20) of the motor vehicle.   5.- Projector according to any one of the   9.- dications I to 4, with optical means that transform the primary light beam into a code light beam or a beam of road light, projector characterized in that:   i) the optical means (22) are arranged on the surface   bending (23) of the deflection reflector (21),   6.- Projector according to any one of   Claims 1 to 5, characterized in that: j) the reflective surface (23) of the deflection reflector (21) is flat.   7.- Projector according to any one of the   Claims 1 to 5, characterized in that: k) the reflective surface of the deflection reflector is   concave or convex or consists of surfaces that de-   limit between them different angles.   8.- Projector according to any one of   Claims 1 to 7, characterized in that:   1) the optical axis (35) of the primary reflector (30) is inclined   born in relation to a horizontal (36) in the sense of de-   placement (20), but preferably the opposite of this displacement (20).   9.- Projector comprising a device for   the basic vertical and horizontal adjustment of the projector, se-   According to one of claims 1 to 8,   characterized in that: m) the elements for the vertical adjustment are fixed on the deflection reflector.   n) the elements for horizontal adjustment are arranged on the primary reflector.   10.- Projector according to any one of   Claims 1 to 8, characterized in that:   o) the elements for the vertical and horizontal basic adjustment   they are arranged either on the deflection reflector or on the primary reflector,   11.- Projector according to any one of   Claims 1 to 10, characterized in that: 10.- p) the primary reflector (30) is capable of pivoting out   of the body (25) on a horizontal axis (37).