EP0590454A2 - Projecteur pour véhicules - Google Patents

Projecteur pour véhicules Download PDF

Info

Publication number
EP0590454A2
EP0590454A2 EP93115077A EP93115077A EP0590454A2 EP 0590454 A2 EP0590454 A2 EP 0590454A2 EP 93115077 A EP93115077 A EP 93115077A EP 93115077 A EP93115077 A EP 93115077A EP 0590454 A2 EP0590454 A2 EP 0590454A2
Authority
EP
European Patent Office
Prior art keywords
leaf spring
diaphragm
fixed
projection
end positions
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.)
Granted
Application number
EP93115077A
Other languages
German (de)
English (en)
Other versions
EP0590454A3 (fr
EP0590454B1 (fr
Inventor
Rolf-Peter Bohr
Albert Völker
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.)
Hella GmbH and Co KGaA
Original Assignee
Hella KGaA Huek and Co
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 Hella KGaA Huek and Co filed Critical Hella KGaA Huek and Co
Publication of EP0590454A2 publication Critical patent/EP0590454A2/fr
Publication of EP0590454A3 publication Critical patent/EP0590454A3/xx
Application granted granted Critical
Publication of EP0590454B1 publication Critical patent/EP0590454B1/fr
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
    • 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
    • F21S41/60—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution
    • F21S41/68—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens
    • F21S41/683—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by a variable light distribution by acting on screens by moving screens
    • F21S41/686—Blades, i.e. screens moving in a vertical plane

Definitions

  • Such a headlight is known from DE 39 03 631 C1.
  • the fixed and the adjustable cover lie flat against each other.
  • Two side-by-side sticks of the fixed cover go through a longitudinal slot of the adjustable cover.
  • the longitudinal slot runs in a circular arc, the center of which lies on the swivel axis.
  • one of the rods of the fixed diaphragm lies against one of the two ends of the longitudinal slot.
  • the adjustable screen is held by a separate leaf spring.
  • the leaf spring passes between the free end portions of the rods of the fixed aperture protruding from the longitudinal slot and is pretensioned with its two end portions between two abutments attached to the adjustable aperture, which open a line passing through the swivel axis are inserted with such a large preload that it runs in an arc in the two end positions and in each end position presses the adjustable diaphragm with one end of the longitudinal slot against a rod of the fixed diaphragm. So that the retaining spring cannot release itself from its clamped state between the abutments, a tab cut free from the adjustable diaphragm is additionally bent over the leaf spring.
  • the leaf spring is a separate part and must be inserted with a large preload between the two abutments of the adjustable diaphragm so that it is held in the end positions without rattling.
  • the assembly of such a small separate leaf spring is cumbersome and time-consuming.
  • not only abutments of the adjustable diaphragm are necessary for the mounting of the separate leaf spring, but it must also be secured against unintentional loosening by the tab cut out of the adjustable diaphragm and bent over the leaf spring.
  • the adjustable cover is also a leaf spring
  • the assembly of the adjustable cover is still simple and easy.
  • the adjustable panel in the adjustment direction is free of play and thus rattle-free fixed on the fixed panel, since there is a form fit in the adjustment direction between the projection and the recess.
  • This positive engagement is secure in the two end positions of the adjustable diaphragm, since the diaphragm slides as far as it is adjusted in its end position on the run-up surface until the projection and the recess lie against one another on the side opposite the run-up surface.
  • the leaf spring bears against the fixed diaphragm under prestress.
  • the pivotable screen at the bearing point which is also the clamping point for the leaf spring, is held securely and rattle-free in its two end positions.
  • the leaf spring between its clamping point and the locking points determining the two end positions is bent away in a section from the fixed panel and this bent section is made before the leaf spring is assembled. This ensures that the leaf spring bears against the fixed cover under tension.
  • the bending point is close to the clamping point lies and is a bending line running approximately in the pivoting direction. It is only necessary to bend the leaf spring around a bending line.
  • the leaf spring rests in an end section located away from the swivel axis under pretension with a section running parallel to the flat, fixed diaphragm.
  • the fixed and adjustable panel should also have its two locking points.
  • the adjustable diaphragm has its effective diaphragm edge in the section abutting the fixed diaphragm. As a result, the effective diaphragm edge of the adjustable diaphragm does not run in the direction of the optical axis at a distance or only at a very small distance from the diaphragm edge of the fixed diaphragm.
  • the cross section of the leaf spring, in which the bending line runs is designed to be small in accordance with the desired spring force with which the leaf spring presses against the fixed diaphragm.
  • any desired material thickness can be selected for the adjustable diaphragm, and yet the spring force with which the leaf spring is to bear against the stationary diaphragm can be precisely defined.
  • the leaf spring is clamped to the stationary screen with an end section that tapers outwards laterally. With such a solution, the magnitude of the spring force varies, depending on at which point of the tapered end section of the leaf spring the bending line runs.
  • a run-up surface is arranged on the adjacent sides of the recesses, which runs at an acute angle to the pivoting direction of the leaf spring.
  • run-up surfaces adjoin one another directly. This allows a very small adjustment of the swiveling screen.
  • cutouts in the pivoting direction of the leaf spring on the side opposite the run-up surface have an inner edge section running transversely to the pivoting direction on their outer edge section, which either serves as a stop for the projection or with which the cutout bears against a stop of the projection.
  • the inner surface portion serving as a stop is formed by punching out an opening, the opening being designed so large that only the portion of the recess having the run-up surface remains, which is a web running between the two openings.
  • Such an embodiment is not only simple and inexpensive to manufacture, but the diaphragm and thus its diaphragm edge can be positioned very precisely in both settings.
  • the web runs at a distance from the adjacent screen.
  • the spring travel of the leaf spring is smaller, the greater the distance between the web and the fixed diaphragm.
  • the projection is a cam pressed out of the panel.
  • Such a cam is simple and inexpensive to manufacture.
  • the cam is spherical on its end face and the end face serves as a run-up surface. Is there such a cam with his spherical end face on a run-up surface of the recess, its contact is point-shaped and represents only a negligible resistance when pivoting the panel.
  • a further advantage is if the cam on its circumferential edge section of its lateral surface adjoining the screen is cylindrical and the edge section serves as a stop for the recess in both end positions of the leaf spring or is pressed against the stop of the recess.
  • the cylindrical edge section can be produced together with the cam at no additional cost.
  • either the recess can be formed exclusively by an opening, the cam having a run-up surface on both sides in the adjustment direction, or the recess can be formed exclusively by a depression pressed into the panel.
  • the cutouts are made substantially wider than the projection transversely to the pivoting direction. This is very advantageous because the projection and the recesses can then be very roughly tolerated with respect to the distance from the pivot axis.
  • the pivot bearing (the clamping point) for the leaf spring is formed by a hollow rivet which is made in one piece with the fixed diaphragm and which engages in an opening of the adjustable diaphragm and is flanged at its end protruding from the opening.
  • a further advantage is if the leaf spring in its two end positions, apart from its clamping point, only with one of the locking elements determining the two end positions on the fixed diaphragm is applied and thus runs with its wide area of the rivet at a small distance from the fixed panel. As a result, it is certain that the leaf spring slides on a run-up surface during pivoting until it assumes its desired end position and does not previously hit the fixed aperture.
  • the optical unit shown in the drawing consists essentially of a bowl-shaped reflector (1), an incandescent lamp (2), a frame (4) carrying a converging lens (3) and a fixed diaphragm (5) and arranged between the incandescent lamp and the converging lens an aperture (6) that can be adjusted manually in two end positions.
  • the bulb (2) is from the back of the reflector (1) with its glass bulb ahead through an opening in the apex of the reflector (1) is inserted and lies with a surrounding base flange on the outer edge of the reflector (1).
  • the incandescent lamp (2) is attached to the reflector (1) by a retaining spring, not shown.
  • the filament (7) of the incandescent lamp (2) serving as the light source lies approximately in the focal point if the reflection surface of the reflector is elliptical and approximately in a focal point if the reflection surface of the bowl-shaped reflector is composed of an infinite number of free small areas, i.e. for the reflecting surface of the reflector does not have any particular mathematical function.
  • the bowl-shaped reflector (1) has a flattened portion (8) which is bent upwards in a plane running perpendicular to the light exit direction.
  • the flattened portion (8) is provided on its inside with a reflective surface on which the light rays of the light source (7) reflecting good apron illumination reflect.
  • the outer edge of the reflector (1) has a flange (9) placed radially outwards.
  • the frame (4) carrying the collecting lens (3) is made of sheet metal and has an annular section (10), in the central opening of which the collecting lens (3) is inserted and fastened to it by adhesive.
  • the ring-shaped section (10) is supported by three support arms (11) of the frame (4) distributed over the circumference of the ring-shaped section (10).
  • the support arms (11) are bent radially outwards with their free end section, lie against the flange (9) and are fastened to the flange by a rivet connection (not shown).
  • the fixed cover (5) is made of sheet metal and is flat.
  • the fixed diaphragm (5) is arranged below the horizontal central plane of the reflector and lies with its lower circular-arc-shaped edge section against the flange (9) of the reflector (1).
  • Flags (29) are cut free on the lower edge of the fixed cover (5), which are bent towards the rear of the reflector (1) and which are guided through openings in the flange (5) when the fixed cover (5) is placed on the reflector and then by bending her protruding from the opening Attach the fixed cover to the flange (9) of the reflector (1) at the end section.
  • the fixed cover (5) has at its lower middle edge (5) a recess (12) into which the lower support arm (11) of the frame (4) is fastened to the flange (9) of the reflector (1).
  • the diaphragm edge of the fixed diaphragm (5) is composed of a horizontal section (13) and a section (14) that slopes downward from the horizontal. Contrary to the direction of light exit, the horizontal section, starting from the optical axis (15), runs to the left and the section falling downwards to the right. With this diaphragm edge (13, 14), the fixed diaphragm (5) represents the light-dark boundary of a light figure, which is asymmetrical due to the sloping section (14). This asymmetrical light distribution exists when the adjustable diaphragm (6) assumes the end position shown in FIG. 3.
  • the adjustable cover (6) is made of spring sheet metal and can be adjusted in two end positions by means of a swivel bearing (15).
  • a swivel bearing 15
  • Fig. 2 the end position of the adjustable diaphragm (6) is shown, in which the diaphragm (6) extends by pivoting upwards with its diaphragm edge (16) in the horizontal plane, in which the horizontal section (13) of the diaphragm edge of the stationary Aperture lies, and passes without a paragraph into section (13).
  • the pivot bearing (15) as seen against the light exit direction, is arranged in the upper left corner area of the two screens (5 and 6).
  • the pivot bearing (15) is formed by a hollow rivet (17) which is produced in one piece with the fixed cover (5) and which, after the adjustable cover (6) has been placed on the wide side surface of the fixed cover (5) facing the converging lens (3) an opening of the fixed aperture passes through. Then the end section of the hollow rivet (17) protruding from the opening of the adjustable diaphragm (6) is flanged.
  • the adjustable diaphragm (6) has on the side opposite the pivot bearing, that is to say on its upper left Corner, an upward operating lever (18).
  • the actuating lever (18) has on its free end section an eyelet-like bent end section (19) which serves as a handle.
  • the angle at which the edges of the corner region having the pivot bearing (15) run is an acute one.
  • the adjustable diaphragm (6) is bent before it is mounted on the side of the swivel bearing on which it has the diaphragm edge (16) by a bending line (20) close to the swivel bearing (15) towards the stationary diaphragm (5).
  • a bending line (20) close to the swivel bearing (15) towards the stationary diaphragm (5).
  • the adjustable screen (6) is bent away from the fixed screen (5) after installation and runs parallel to the end section having the screen edge (16) because of the proximity of the bending line to the pivot bearing (15) fixed aperture (5).
  • the locking elements by which the adjustable diaphragm (6) is held in the two end positions, are introduced into the end section having the diaphragm edge (16).
  • the locking elements consist of two recesses (25) made in the leaf spring (6) and a projection (22) of the fixed cover (5).
  • the projection (22) is a cam pressed out of the fixed cover (5). Its end face (23) is spherical, and its lateral surface section (24) adjacent to the fixed cover (5) is cylindrical.
  • the cam (22) engages in the adjustment direction with a positive fit in the respective recess (25) of the adjustable diaphragm (6).
  • the cutouts (25) are formed by openings (21) arranged at a distance from one another and a central section of the web (26) separating the two openings (21).
  • the web (26) is bent so that it is V-shaped in cross section and the outside (27) of the Legs of the V-shape serve as a run-up surface, with which they rest resiliently in the two end positions of the leaf spring (6) on the spherical end face (23) of the cam (22).
  • the leaf spring (6) slides away from the end position into the other through a first run-up surface (27) from the fixed cover (5) and through the second run-up surface (27) to the fixed cover (5). until it abuts with the cylindrical lateral surface section (24) of the cam (22) on the inner surface section (28) of the opening (21) opposite the run-up surface (27). It is advantageous here if both the web and the screen (6) are at a distance from the fixed screen, in order to ensure that the adjustable screen rests with the inner surface section (28) on the stop (24).
  • the adjustable diaphragm (6) can be pivoted either by the actuating lever (8) or by the actuating device (30, 31) shown in dashed lines in FIGS. 2 and 3.
  • the actuating device (30, 31) consists of an actuating arm (not shown) pivotably mounted on the outer circumferential edge of the reflector (1), which extends with one free end close to the bulb holder and is fork-shaped with the other free end.
  • the two legs (30) of the fork include, with play, a tab (31) cut free from the leaf spring (6).
  • the adjustable diaphragm (6) cannot be lifted off the fixed diaphragm (5) either by the actuating lever (8) or by the actuating device (30, 31), and thus the adjustable diaphragm (6) cannot be raised the two specific end positions can be pivoted.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)
EP93115077A 1992-10-01 1993-09-20 Projecteur pour véhicules Expired - Lifetime EP0590454B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4233032 1992-10-01
DE4233032A DE4233032A1 (de) 1992-10-01 1992-10-01 Scheinwerfer für Fahrzeuge

Publications (3)

Publication Number Publication Date
EP0590454A2 true EP0590454A2 (fr) 1994-04-06
EP0590454A3 EP0590454A3 (fr) 1994-04-20
EP0590454B1 EP0590454B1 (fr) 1996-06-05

Family

ID=6469398

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93115077A Expired - Lifetime EP0590454B1 (fr) 1992-10-01 1993-09-20 Projecteur pour véhicules

Country Status (4)

Country Link
EP (1) EP0590454B1 (fr)
AT (1) ATE139021T1 (fr)
DE (2) DE4233032A1 (fr)
ES (1) ES2088205T3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2727496A1 (fr) * 1994-11-30 1996-05-31 Valeo Vision Projecteur automobile, en particulier a reflecteur elliptique, produisant un faisceau susceptible de deux coupures selectivement commutables
EP0896187A1 (fr) * 1997-08-08 1999-02-10 Hella KG Hueck & Co. Dispositif de commande pour ensemble d'écran
EP1010935A3 (fr) * 1998-12-17 2001-10-17 Hella KG Hueck & Co. Projecteur por véhicules
EP1455133A1 (fr) * 2003-03-03 2004-09-08 Valeo Vision Projecteur pour véhicule automobile comportant un cache mobile équipé de moyens de verrouillage
AT502192B1 (de) * 2006-02-13 2007-02-15 Zizala Lichtsysteme Gmbh Blendenanordnung für eine lichteinheit

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10125462A1 (de) * 2001-05-25 2002-11-28 Hella Kg Hueck & Co Projektionsmodul für einen Fahrzeugscheinwerfer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1122429A (en) * 1965-09-06 1968-08-07 Ft Products Ltd Improved stay mechanism
DE3903631C1 (fr) * 1989-02-08 1990-07-05 Hella Kg Hueck & Co, 4780 Lippstadt, De

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3926455A1 (de) * 1989-08-10 1991-02-14 Hella Kg Hueck & Co Scheinwerfer fuer fahrzeuge
DE3939710C1 (fr) * 1989-12-01 1991-05-29 Hella Kg Hueck & Co, 4780 Lippstadt, De

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1122429A (en) * 1965-09-06 1968-08-07 Ft Products Ltd Improved stay mechanism
DE3903631C1 (fr) * 1989-02-08 1990-07-05 Hella Kg Hueck & Co, 4780 Lippstadt, De

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2727496A1 (fr) * 1994-11-30 1996-05-31 Valeo Vision Projecteur automobile, en particulier a reflecteur elliptique, produisant un faisceau susceptible de deux coupures selectivement commutables
EP0896187A1 (fr) * 1997-08-08 1999-02-10 Hella KG Hueck & Co. Dispositif de commande pour ensemble d'écran
EP1010935A3 (fr) * 1998-12-17 2001-10-17 Hella KG Hueck & Co. Projecteur por véhicules
EP1455133A1 (fr) * 2003-03-03 2004-09-08 Valeo Vision Projecteur pour véhicule automobile comportant un cache mobile équipé de moyens de verrouillage
AT502192B1 (de) * 2006-02-13 2007-02-15 Zizala Lichtsysteme Gmbh Blendenanordnung für eine lichteinheit

Also Published As

Publication number Publication date
ATE139021T1 (de) 1996-06-15
DE59302810D1 (de) 1996-07-11
DE4233032A1 (de) 1994-04-07
ES2088205T3 (es) 1996-08-01
EP0590454A3 (fr) 1994-04-20
EP0590454B1 (fr) 1996-06-05

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