EP0637715B1 - Vorrichtung zur lösbaren Arretierung einer Lampe an einem Reflektor eines Fahrzeugscheinwerfers - Google Patents

Vorrichtung zur lösbaren Arretierung einer Lampe an einem Reflektor eines Fahrzeugscheinwerfers Download PDF

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Publication number
EP0637715B1
EP0637715B1 EP94110308A EP94110308A EP0637715B1 EP 0637715 B1 EP0637715 B1 EP 0637715B1 EP 94110308 A EP94110308 A EP 94110308A EP 94110308 A EP94110308 A EP 94110308A EP 0637715 B1 EP0637715 B1 EP 0637715B1
Authority
EP
European Patent Office
Prior art keywords
reflector
lamp
tongues
locking ring
opening
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
EP94110308A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0637715A1 (de
Inventor
Jan Bobcza
Heinrich Sottmann
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 EP0637715A1 publication Critical patent/EP0637715A1/de
Application granted granted Critical
Publication of EP0637715B1 publication Critical patent/EP0637715B1/de
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
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/19—Attachment of light sources or lamp holders
    • F21S41/194—Bayonet attachments

Definitions

  • the invention relates to a device for releasably locking a lamp to a reflector of a vehicle headlight, with an opening made in the reflector, which is used to hold a lamp which can be passed from the rear of the reflector with its glass bulb through the opening of the reflector, and which has a base with a circumferential flange, from which positioning tabs extend radially outwards and with a locking ring which surrounds the opening of the reflector and is fastened to the reflector and is made of plastic and on which resilient tongues are formed, between which the lamp with its positioning tabs can be passed and which overlap the positioning tabs after a subsequent rotation of the lamp about its longitudinal axis, the positioning tabs sliding along a run-up slope of the tongues until the tongues in the end position of the lamp under Vo Apply tension to the positioning tabs and press the flange of the base against a contact surface directed against the direction of insertion of the lamp.
  • the locking ring In the device known from EP 0 292 200 A2 for releasably locking a lamp to a reflector of a vehicle headlight, not only the locking ring but also the reflector is made of plastic.
  • the plastic used for the locking ring must not only be highly heat-resistant and dimensionally stable, like the plastic for the reflector, but also have a sufficiently large elastic property, since the resilient tongues are molded onto the locking ring. That is why the plastic for the locking ring is currently much more expensive than the plastic for the reflector.
  • the expensive plastic for the locking ring increases the total costs for the headlight only slightly.
  • the glass bulb of the lamp surrounds a filament and the base of the lamp is made of plastic.
  • the electrical plug connection protrudes from the rear of the base and points with its free end radially outwards.
  • the flange is integrally formed between the glass bulb and the plug connection on the base with three radially outwardly projecting positioning tabs and is much thicker than the positioning tabs.
  • the positioning tabs are at a distance from the surface of the flange directed in the direction of insertion of the lamp.
  • a circumferential groove is made between the flange and the glass bulb, which serves to accommodate an annular seal.
  • the opening of the reflector for receiving the lamp is surrounded on the inside by a collar, on the inside of which the lamp lies tightly after the insertion with the ring seal surrounding the base.
  • the edge section of the opening of the reflector has the contact surface for the flange of the base of the lamp.
  • the resilient arms of the locking ring lie against the positioning tabs under pre-tension and press the flange against the contact surface of the reflector.
  • the fastening means on the reflector is a flange-like projection which is molded onto the reflector and surrounds its contact surface and which is directed radially outward.
  • this projection withstands the additional tensile forces and because it, like the reflector, is made of brittle plastic, it must be designed with a correspondingly thick wall. As a result, sink marks can occur on the inside of the reflector or, if these should not occur, the reflector in the area of its reflection surface must have a wall thickness as thick as the flange-like projection.
  • the locking ring engages behind the flange-like projection of the reflector with locking lugs which are formed on the outer circumferential edge of the locking ring and point with their free end in the direction of insertion of the lamp. So that the radially inwardly directed resilient arms of the locking ring always axially lock the lamp with a sufficiently large force, the distance between the resilient arms or their ramp surfaces and the contact surface of the reflector facing them must be tolerated accordingly small. It is very difficult to maintain such a small tolerance in practice because it is made up of several individual, added tolerances. A further disadvantage is that the locking ring can only be attached to a reflector which has a contact surface for the lamp which is precisely matched to it.
  • the object of the invention is to design the device described in the preamble of claim 1 for releasably locking a lamp on a reflector of a vehicle headlight in such a way that after insertion of the lamp the axial forces existing through the resilient tongues of the locking ring do not affect the connection between the locking ring and the reflector-producing fastening means can act in order to ensure that the fastening means can be dimensioned as small as possible, even if the resilient tongues rest with a very great force on the positioning tabs of the lamp.
  • the tightness of the lamp should always be secure even if the locking ring is used universally in many headlights and the reflector in the region of its opening receiving the lamp, e.g. B. is deformed by very high heat.
  • the reflector should be simple to design in the region of its opening that receives the lamp, and no additional part should be required to lock the lamp.
  • the locking ring consists in one piece of the resilient tongues and an inner edge portion which runs between the resilient tongues and the reflector at a distance from the contact surfaces of the tongues and whose side facing the tongues is the contact surface for the Has flange of the base of the lamp.
  • the reflector can be made both from plastic and from sheet metal.
  • the distance between the resilient tongues and the contact surface, which determines the axial tightness of the lamp is always the same, since it does not exist between two parts and therefore cannot change if the locking ring is incorrectly installed on the reflector.
  • the forces with which the resilient arms bear against the positioning tab of the lamp can be chosen so large that the lamp cannot automatically release itself from its jamming tight fit between the resilient arms and the contact surface.
  • the locking ring between two adjacent tongues is offset with an outer ring section toward the reflector and the inner edge section is molded onto the ring sections.
  • the locking ring is very torsion-resistant.
  • the inner edge section is circumferential and extends with radially outwardly directed wall sections to below the respective tongue, the inner edge section with its wall sections of an integral, annular, spaced apart from the resilient tongues Disc is formed.
  • the resilient tongues each have the annular disks offset from the reflector through side walls are connected, the inside of which adjoins the underside of the tongues so that they can be demolded together with the underside of the tongues and the side of the wall sections facing the tongues by means of an adjustable tool part which is displaced radially outward when the locking ring is removed from the mold.
  • Such a locking ring is simple and very inexpensive to manufacture.
  • each tongue is connected to the annular disk at the outer narrow edges of its root via a side wall and the side walls arranged between two tongues are directed towards it Merge the edge into a rib connecting them and molded onto the pane.
  • the torsional stiffness of the locking ring is particularly high.
  • At least one side wall extends radially inwards so far that its inside serves as a stop for a positioning tab of the lamp in the end position.
  • the central opening of the annular disc is surrounded by a collar directed towards the reflector, which extends into the opening of the reflector for the radial locking of the locking ring and the inside of which serves to radially fix the lamp.
  • the radial locking of the locking ring in the reflector is provided with simple means.
  • the locking ring has fastening means on the annular disk, by means of which the locking ring can be connected to the reflector. Holes introduced through the locking ring can serve as fastening means through which the Locking ring on its outside engaging behind projections of the reflector.
  • the annular disk is designed in the form of a shell, the shell being open towards the reflector.
  • the torsional rigidity of the locking ring is very high.
  • the side edge of the shell rests with its free end on the back of the reflector. This ensures that no bending moment can occur at the attachment points between the locking ring and the reflector when the lamp is changed.
  • the outer surface of the side edge of the cup-shaped disk serves as a contact surface for an annular rubber cap which surrounds the collar and which, with its outer peripheral edge, can be placed tightly on an opening in a housing of the vehicle headlight. In this way, a lamp can be replaced in a housing headlight without having to remove a cap covering the lamp.
  • the resilient tongues have an edge section directed against the direction of insertion of the lamp at their inwardly directed free end. As a result, it is not possible to defocuss the lamp, that is to say to insert it obliquely into the opening of the reflector, since the edge sections prevent the lamp from being able to be placed on the outside of one of the resilient tongues with a positioning tab.
  • the resilient tongues taper in thickness towards their free end. As a result, both the contact pressure and the axial spring travel of the tongues can be optimally large.
  • resilient tongues are each at their roots with a single side wall with the annular disk connected and extend in their longitudinal extension concentrically to the longitudinal axis of the lamp.
  • the locking ring in the area of its resilient tongues and its annular disk can have such a small outside diameter that it does not extend radially outward beyond the resilient tongues in this area and can protrude into a correspondingly small opening in a housing of the headlight.
  • fastening means are attached to the outer edge section of the bowl-shaped disk, by means of which the locking ring can be fastened to a supporting frame.
  • the locking ring carries both the lamp and the reflector, and nevertheless the fastening means which establish the connection between the locking ring and the reflector can continue to be of very small dimensions, since the fastening means carry a reflector, in which adjustment devices of the headlight do not produce any internal tensioning forces can and which is therefore very thin-walled.
  • the vehicle headlight (see FIG. 1) has a cup-shaped housing (1) made of plastic, the front opening of which is sealed off by a shell-shaped translucent cover plate (2).
  • a bowl-shaped reflector (3) is inserted, which is connected to the housing (1) by adjusting elements not shown in the drawing and by this around at least one axis is pivotable.
  • the reflector (3) is made of a heat-resistant, brittle plastic.
  • the bowl-shaped reflector (3) has an opening (4) in the area of its apex for receiving a lamp (5).
  • the lamp (5) shown as an individual part in FIG. 2 has a base (6) made of plastic, which has a glass bulb (8) surrounding a filament (7) on its front and a housing part (9) integrally formed on its back, which is open radially outwards and in the interior of which the plug connection (10) for the lamp (5) is arranged.
  • a radially outwardly directed flange (11) is integrally formed on the base (6) between the housing part (9) and the glass bulb (8) and carries three molded positioning tabs (12) on its end face. The flange (11) is much thicker than the positioning tabs (12).
  • the surfaces of the positioning tabs (12) and the flange (11) facing the rear of the lamp (5) lie in one plane, while the surfaces of the positioning tabs and facing the front of the lamp (5) of the flange are axially spaced apart.
  • a groove (13) accommodating an annular seal (13) is made all the way around the base (6).
  • the opening (4) made in the reflector (3) is surrounded on the outside by a neck (14) directed towards the rear of the vehicle headlight.
  • a locking ring (15) is attached to the rear of the reflector and is made of a heat-resistant, dimensionally stable and elastic plastic.
  • the locking ring (15) has three radially inwardly directed resilient tongues (16).
  • the ring sections (17) running between the tongues have fastening means (18) which are through openings made in the ring sections (17).
  • the through openings are surrounded by a rib (19) directed towards the rear of the headlight.
  • the three ring sections (17) are offset in the light exit direction to the plane in which the tongues (16) run, at a distance from the reflector (3).
  • the lamp (5) lies with its flange (11) on an inner peripheral edge section (21) of the locking ring (15).
  • Radially outwardly directed wall sections (22) are formed on the inner edge section (21) below the tongues (16).
  • the inner edge cut (21) and the wall sections (22) molded onto it run in one plane with the ring sections (17) and are a one-piece, annular disc, the central opening (29) of which has a smaller inner diameter than that of the free end sections the opening (16) formed.
  • the side walls (23) which connect the resilient tongues (16) to the ring sections (17) run with their facing inner side surfaces in such a way that they can be removed from the mold with an adjustable tool part which is adjusted radially outward when the locking ring (15) is removed from the mold .
  • the free end section of the tongues (16) has an edge section (24) directed towards the reflector (3) and an edge section (25) directed away from the reflector.
  • the edge section (24) has on the side facing the inner edge section (21), which forms the contact surface for the flange (11) of the lamp, a run-up surface (27) for the positioning tabs (12).
  • the side walls (23), which connect the resilient tongues (16) to the ring sections (17), are connected to one another on their inward-facing sides by a rib (28) molded onto the annular disk.
  • the central opening (29) which is surrounded by the inner edge section (21) of the annular disc has a circumferential collar (30) directed towards the reflector.
  • the collar (30) engages in the interior of the neck (14) of the reflector (3) largely without play.
  • the locking ring (15) is secured against rotation by a projection (31) formed on the outside of the collar (30), which engages in a corresponding clearance (20) on the inside of the neck (14) of the reflector (3).
  • the locking ring (15) is fixed axially by the end face of the neck (14) of the reflector (3), against which it rests with a surface adjacent to the collar (30).
  • a cylindrical side edge (32) directed towards the reflector (3) is formed on the outer edge of the annular disk having the central opening (29) and its end face adjoins the back of the bowl-shaped reflector at least in sections.
  • the locking ring (15) is axially locked to the reflector (3) by rivet-like pins (33) molded onto the rear of the reflector (3), which lead through the openings (18) of the ring sections (17) of the locking ring (15) and their the free end portion protruding from the opening (18) is shaped under the action of heat to form a head which engages over the edge of the opening (18).
  • the rib (19) surrounding the opening (18) forms a recess into which a sealant can be introduced.
  • the lamp (5) is then rotated clockwise about its longitudinal axis, the lamp (5) with its positioning tabs (12) engaging under the free end sections of the resilient tongues (16) and first on an inclined section (34) of a run-up surface (27 ) slides along the resilient tongues (16) until a positioning tab is gripped by an elevation (35) and this positioning tab (12) or another strikes against a radially inward extension (36) of a side wall (23).
  • the resilient tongues (16) with their contact surface (27) bear against the positioning tabs (12) of the lamp (5) and press the flange (11) against the inner edge portion (21) of the Locking ring (15).
  • a projection (40) is formed on the side of the radially outwardly directed wall sections (22) opposite the edge section (24) of the resilient tongues (16), which extension extends up to the positioning tabs (12) of the lamp (5).
  • the lugs (40) are rib-like and run below the free end of the tongues (16) from one side wall (23) to the other. There is therefore a gap between the edge section (24) of the resilient tongues (16) and the rib-like extension (40), through which the lamp (5) is positively guided when it is inserted with the positioning tabs (12) and therefore cannot be inserted at an angle.
  • the lamp (5) is in its end position with its positioning tabs (12) not against the lugs (40), but with its flange (11) on the contact surface (26).
  • the gap between the locking ring (15) and the peripheral edge of the opening (37) of the housing (1) is covered by an annular seal (38).
  • the annular seal (38) is meandering in cross-section and lies with its inner edge under prestress on the outside of the cylindrical side edge (32) of the locking ring (15), while the annular seal (38) with its outer edge is tight on one Opening (37) of the housing (1) surrounding collar (39) is placed.
  • the headlight shown in FIGS. 5 and 6 differs from the headlight shown in FIGS. 1 to 4 essentially in that the resilient tongues (16) extend concentrically to the longitudinal axis of the lamp (5) and their roots ( 41) with a single side wall (23) to which the annular disk consisting of the inner edge section (21), the wall sections (22) and the ring sections (17) are connected. At least one of the side walls (23) serves as a stop for a positioning tab (12) of the lamp (5).
  • the side edge (32) molded onto the annular disk runs in a cylinder, on which the tongues (16) adjoin with their radially outwardly directed narrow side.
  • the side walls (23) are extended in the direction of the free end of the tongue (16) adjacent to them and extend with the end section (45) of their extension along the outer edge of the annular disk.
  • annular disc At the side edge (32) of the bowl-shaped, annular disc is one at a distance molded to the bowl-shaped reflector (3) edge portion (42).
  • Four fastening means (43) are attached to the edge section (42), by means of which the locking ring (15) can be rigidly fastened to a support frame (44).
  • the fastening means (43) are formed by threaded bores made in the edge section (42), into which screws engage with their threaded shank.
  • the threaded shaft of the screws extends through bores in the edge section of a support frame (44) and its head rests against the back of the support frame (44).

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  • 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)
EP94110308A 1993-07-10 1994-07-02 Vorrichtung zur lösbaren Arretierung einer Lampe an einem Reflektor eines Fahrzeugscheinwerfers Expired - Lifetime EP0637715B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4323118A DE4323118C1 (de) 1993-07-10 1993-07-10 Vorrichtung zur lösbaren Anordnung einer Lampe an einem Reflektor eines Fahrzeugscheinwerfers
DE4323118 1993-07-10

Publications (2)

Publication Number Publication Date
EP0637715A1 EP0637715A1 (de) 1995-02-08
EP0637715B1 true EP0637715B1 (de) 1997-04-23

Family

ID=6492486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94110308A Expired - Lifetime EP0637715B1 (de) 1993-07-10 1994-07-02 Vorrichtung zur lösbaren Arretierung einer Lampe an einem Reflektor eines Fahrzeugscheinwerfers

Country Status (4)

Country Link
US (1) US5515245A (es)
EP (1) EP0637715B1 (es)
DE (2) DE4323118C1 (es)
ES (1) ES2103094T3 (es)

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JPH0817207A (ja) * 1994-06-30 1996-01-19 Koito Mfg Co Ltd ソケットカバー
FR2749239B1 (fr) * 1996-05-30 1998-08-21 Valeo Vision Projecteur, notamment pour vehicule automobile, presentant une structure mecanique perfectionnee
EP0878830A1 (de) * 1997-05-12 1998-11-18 Luxram Licht AG Glühlampe für Verkehrssignale
DE19861321B4 (de) * 1997-08-22 2007-04-05 Automotive Lighting Reutlingen Gmbh Beleuchtungseinrichtung für Fahrzeuge
DE19739173A1 (de) * 1997-09-06 1999-03-11 Hella Kg Hueck & Co Signalleuchte für Fahrzeuge
FR2776050B1 (fr) 1998-03-11 2000-06-16 Valeo Vision Projecteur notamment pour vehicule automobile comportant un porte-lampe a connexion simplifiee
DE19845459A1 (de) * 1998-10-02 2000-04-06 Hella Kg Hueck & Co Fahrzeugscheinwerfer und Verfahren zum Herstellen eines Fahrzeugscheinwerfers
DE29912869U1 (de) 1999-07-23 1999-09-16 Hella Kg Hueck & Co, 59557 Lippstadt Fahrzeugscheinwerfer
US6913376B2 (en) * 2001-10-31 2005-07-05 Guide Corporation Sealing bulb boot for moveable reflectors
ATE484710T1 (de) 2004-04-02 2010-10-15 Martin Professional As Lichtquellenmodul
US7425893B2 (en) 2005-06-29 2008-09-16 Mathew Randolph Aron Integrated motorcycle light frame and turn signal assembly
US20070210907A1 (en) * 2005-06-29 2007-09-13 Aron Mathew R Illuminated motorcycle fairing element
CN102155731B (zh) * 2008-06-10 2013-07-10 马田专业公司 用于照明设备的光源模块
US7954981B2 (en) * 2008-06-10 2011-06-07 Martin Professional A/S Light source module for a light fixture
EP2133626B1 (en) 2008-06-10 2014-07-23 Martin Professional A/S Cooling arrangement for a light source module.
EP2163814B1 (de) * 2008-09-16 2020-03-11 HELLA GmbH & Co. KGaA Reflektor für eine Beleuchtungsvorrichtung eines Kraftfahrzeugs
JP2011108456A (ja) * 2009-11-16 2011-06-02 Koito Mfg Co Ltd 車両用灯具
CN102679250B (zh) * 2011-03-17 2014-02-19 海洋王照明科技股份有限公司 机动车前大灯
DE102012109059B4 (de) * 2012-09-26 2022-02-03 HELLA GmbH & Co. KGaA Halterung eines Leuchtmittels in der Öffnung eines Reflektors
CN105444122A (zh) * 2014-09-28 2016-03-30 江苏海德莱特汽车部件有限公司 一种车灯用反射镜组件
JP1652398S (es) * 2019-01-15 2020-02-10
JP1652408S (es) * 2019-01-15 2020-02-10
USD899640S1 (en) * 2019-05-30 2020-10-20 Shenzhen Sangshen E-commerce Co., Ltd. LED lamp
USD899639S1 (en) * 2019-05-30 2020-10-20 Shenzhen Sangshen E-commerce Co., Ltd. LED lamp

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Also Published As

Publication number Publication date
DE4323118C1 (de) 1995-01-05
US5515245A (en) 1996-05-07
ES2103094T3 (es) 1997-08-16
EP0637715A1 (de) 1995-02-08
DE59402495D1 (de) 1997-05-28

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