GB2071559A - A headlight or lamp for motor vehicles - Google Patents

A headlight or lamp for motor vehicles Download PDF

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Publication number
GB2071559A
GB2071559A GB8104788A GB8104788A GB2071559A GB 2071559 A GB2071559 A GB 2071559A GB 8104788 A GB8104788 A GB 8104788A GB 8104788 A GB8104788 A GB 8104788A GB 2071559 A GB2071559 A GB 2071559A
Authority
GB
United Kingdom
Prior art keywords
reflector
lamp
housing
colouring
lens
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
GB8104788A
Other versions
GB2071559B (en
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB2071559A publication Critical patent/GB2071559A/en
Application granted granted Critical
Publication of GB2071559B publication Critical patent/GB2071559B/en
Expired legal-status Critical Current

Links

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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/29—Attachment thereof
    • 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
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/162—Incandescent light sources, e.g. filament or halogen lamps
    • 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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass
    • 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
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/37—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors characterised by their material, surface treatment or coatings
    • 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
    • F21S41/50—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
    • F21S41/55—Attachment thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
    • F21S43/33—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors characterised by their material, surface treatment or coatings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
    • F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A lamp or a headlamp for motor vehicles has a housing (10) and a reflector (11) which both consist of thermoplastic plastics material and are produced in an injection moulding machine in two method steps wherein the housing (10) plastics material has a dark colouring, but the reflector (11) plastics material has a white or silver grey colouring so that the reflecting surface of the reflector need not be further treated. The rim of the reflector (11) formed as an external rib (17) is welded to a web (18) of the lens (13). In a further embodiment (Fig. 2, not shown) the housing is annular and surrounds the reflector. <IMAGE>

Description

SPECIFICATION A headlight or lamp for motor vehicles STATE OF THE ART The reflector on motor vehicle lamps produced from plastics material is often moulded integrally with the housing. The particular colouring, that is to say the colour of the iamp, is often determined by the automobile manufacturer especially when parts of the lamp are visible by traffic participants; the colouring is then generally black.
Such dark reflectors need a bright reflective layer, preferably white or silver grey; this layer is applied by subsequent surface methods such as vapour deposition or lacquering on the inner surface of the reflector. That means that after the injection of the lamp in the plastics injection machine, the moulded part must be mounted, then cleaned in washing equipment and finally surface treated. This multi-stage production involves comparatively high costs which are to be avoided, particularly in mass production.
ADVANTAGES OF THE INVENTION The problem pointed out under the state of the art is substantially solved by the lamp or the headlamp for motor vehicles according to the invention. The lamp in accordance with the invention is produced as a so-called double layer injection moulding in known multi-colour injection machines as has been known for a long time for example with lenses for such lamps or with domestic articles. If a welding machine for the welding of the lens to the housing/reflector is linked to the injection machine, then the assembly may also follow directly so that soiling of the injected part by intermediate storage is excluded.
Advantageous further developments of the invention are described in the sub-claims. With lamps or headlamps in dark housing coiours a socalled black border is seen through the lens even with surface treated reflector areas after the welding operation. The surface layer is distorted during welding and the welded connecting web appears in the colour of the housing. This is avoided with the construction of the lamp or of the headlamp according to claim 5. With the feature of claim 6, the edge of the reflector is used for welding to the lens in an advantageous manner.
DRAWING Two embodiments of the invention are illustrated in the drawing and are described in detail in the following specification. Figure 1 shows, in vertical section and to a natural scale, a lamp for motor vehicles provided with a housing enclosing the reflector and Figure 2 shows the lamp with an annular housing surrounding the reflector.
DESCRIPTION OF THE EMBODIMENTS The lamp in Figure 1 consists essentially of a double shell member of plastics material comprising a housing 10 and a reflector 11, an incandescent lamp 12 shown without a mounting and a lens 13. The lamp is inserted in the vehicle body 14 and is releasably fixed thereto by elements (not shown).
The housing 10 has substantially the shape of the reflector 11 and changes, through a flange-like shoulder 1 6, into an outwardly turned back frame 1 5. The rim of the reflector has an external rib 1 7 engaging the shoulder 1 6 on the housing 10. The housing 10 and the reflector 11 preferably consist of a thermoplastic plastics material wherein that of the housing 10 is darkly coloured but that of the reflector 11 has a colouring of such a kind that further treatment, especially coloured treatment, of the reflecting surface of the reflector 11 is not necessary white or silver grey are offered as such a colouring.The lens 1 3 has a surrounding web 1 8 which matches the rim or the outer rib 1 7 of the reflector and which are permanently connected to one another, preferably by welding.
The lamp illustrated in figure 2 has the same references for the features alreadly described as in Figure 1. The housing has the shape of a hoop-like ring 20 and consists of a thermoplastic plastics material of dark colouring -- like the housing 10 in Figure 1. The reflector 21 injection moulded into the housing 20 likewise consists of a thermoplastic plastics material but with a white or silver grey colouring.
1. A method of producing lamps or headlamps for motor vehicles with the following steps: a) a housing preferably of thermoplastic plastic material of a desired colouring is moulded in an injection machine, thereafter b) a reflector preferably of thermoplastic plastics material is welded into the housing, or step a) follows after step b), wherein c) the colouring of the plastic material is such that a further treatment, especially a coloured treatment, of the reflecting surface of the reflector is not necessary.
2. A lamp produced according to claim 1 with the following feature: d) a frame (15) is moulded in the housing.
3. A lamp according to claim 2 with the following feature: e) the housing has the shape of a hoop-like ring.
4. A lamp according to claim 2 with the following feature: f) the housing is substantially in the form of the reflector and encloses the reflector from the outside.
5. A lamp the lens of which has an annular web, according to one of claims 2 to 4 with the following features: g) the web of the lens and the rim of the reflector are matching, h) the web and the rim of the reflector are permanently connected to one another, preferably welded.
6. A lamp according to claim 5 with the following feature: i) the rim of the reflector has an external rib
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (9)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION A headlight or lamp for motor vehicles STATE OF THE ART The reflector on motor vehicle lamps produced from plastics material is often moulded integrally with the housing. The particular colouring, that is to say the colour of the iamp, is often determined by the automobile manufacturer especially when parts of the lamp are visible by traffic participants; the colouring is then generally black. Such dark reflectors need a bright reflective layer, preferably white or silver grey; this layer is applied by subsequent surface methods such as vapour deposition or lacquering on the inner surface of the reflector. That means that after the injection of the lamp in the plastics injection machine, the moulded part must be mounted, then cleaned in washing equipment and finally surface treated. This multi-stage production involves comparatively high costs which are to be avoided, particularly in mass production. ADVANTAGES OF THE INVENTION The problem pointed out under the state of the art is substantially solved by the lamp or the headlamp for motor vehicles according to the invention. The lamp in accordance with the invention is produced as a so-called double layer injection moulding in known multi-colour injection machines as has been known for a long time for example with lenses for such lamps or with domestic articles. If a welding machine for the welding of the lens to the housing/reflector is linked to the injection machine, then the assembly may also follow directly so that soiling of the injected part by intermediate storage is excluded. Advantageous further developments of the invention are described in the sub-claims. With lamps or headlamps in dark housing coiours a socalled black border is seen through the lens even with surface treated reflector areas after the welding operation. The surface layer is distorted during welding and the welded connecting web appears in the colour of the housing. This is avoided with the construction of the lamp or of the headlamp according to claim 5. With the feature of claim 6, the edge of the reflector is used for welding to the lens in an advantageous manner. DRAWING Two embodiments of the invention are illustrated in the drawing and are described in detail in the following specification. Figure 1 shows, in vertical section and to a natural scale, a lamp for motor vehicles provided with a housing enclosing the reflector and Figure 2 shows the lamp with an annular housing surrounding the reflector. DESCRIPTION OF THE EMBODIMENTS The lamp in Figure 1 consists essentially of a double shell member of plastics material comprising a housing 10 and a reflector 11, an incandescent lamp 12 shown without a mounting and a lens 13. The lamp is inserted in the vehicle body 14 and is releasably fixed thereto by elements (not shown). The housing 10 has substantially the shape of the reflector 11 and changes, through a flange-like shoulder 1 6, into an outwardly turned back frame 1 5. The rim of the reflector has an external rib 1 7 engaging the shoulder 1 6 on the housing 10. The housing 10 and the reflector 11 preferably consist of a thermoplastic plastics material wherein that of the housing 10 is darkly coloured but that of the reflector 11 has a colouring of such a kind that further treatment, especially coloured treatment, of the reflecting surface of the reflector 11 is not necessary white or silver grey are offered as such a colouring.The lens 1 3 has a surrounding web 1 8 which matches the rim or the outer rib 1 7 of the reflector and which are permanently connected to one another, preferably by welding. The lamp illustrated in figure 2 has the same references for the features alreadly described as in Figure 1. The housing has the shape of a hoop-like ring 20 and consists of a thermoplastic plastics material of dark colouring -- like the housing 10 in Figure 1. The reflector 21 injection moulded into the housing 20 likewise consists of a thermoplastic plastics material but with a white or silver grey colouring. CLAIMS
1. A method of producing lamps or headlamps for motor vehicles with the following steps: a) a housing preferably of thermoplastic plastic material of a desired colouring is moulded in an injection machine, thereafter b) a reflector preferably of thermoplastic plastics material is welded into the housing, or step a) follows after step b), wherein c) the colouring of the plastic material is such that a further treatment, especially a coloured treatment, of the reflecting surface of the reflector is not necessary.
2. A lamp produced according to claim 1 with the following feature: d) a frame (15) is moulded in the housing.
3. A lamp according to claim 2 with the following feature: e) the housing has the shape of a hoop-like ring.
4. A lamp according to claim 2 with the following feature: f) the housing is substantially in the form of the reflector and encloses the reflector from the outside.
5. A lamp the lens of which has an annular web, according to one of claims 2 to 4 with the following features: g) the web of the lens and the rim of the reflector are matching, h) the web and the rim of the reflector are permanently connected to one another, preferably welded.
6. A lamp according to claim 5 with the following feature: i) the rim of the reflector has an external rib engaging a shoulder on the housing and which is permanently connected to the web on the lens, preferably welded.
7. A lamp formed as a multi-chamber lamp characterised in that j) the multi-chamber lamp is produced according to the method of claim 1 and has one or more of the features of claims 2 to 6.
8. A method of producing lamps or headlamps for motor vehicles substantially as described herein.
9. A lamp or headlamp for a motor vehicle substantially as herein described with reference to Figure 1 or Figure 2 of the accompanying drawings.
GB8104788A 1980-03-14 1981-02-16 Headlight or lamp for motor vehicles Expired GB2071559B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19803009823 DE3009823A1 (en) 1980-03-14 1980-03-14 HEADLIGHTS OR LIGHTS FOR MOTOR VEHICLES

Publications (2)

Publication Number Publication Date
GB2071559A true GB2071559A (en) 1981-09-23
GB2071559B GB2071559B (en) 1983-06-08

Family

ID=6097213

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8104788A Expired GB2071559B (en) 1980-03-14 1981-02-16 Headlight or lamp for motor vehicles

Country Status (4)

Country Link
DE (1) DE3009823A1 (en)
FR (1) FR2478263A1 (en)
GB (1) GB2071559B (en)
IT (1) IT8120303A0 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385824A1 (en) * 1989-03-03 1990-09-05 Valeo Vision Method for making a reflector of synthetic material for a lighting device
WO1996030696A1 (en) * 1995-03-28 1996-10-03 Itt Automotive Europe Gmbh Vehicle lamp

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4235289C2 (en) * 1992-10-20 1996-08-01 Teves Gmbh Alfred Signal light for a vehicle
DE19829145A1 (en) * 1998-06-30 2000-01-20 Volkswagen Ag Headlamp for motorcar

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB886755A (en) * 1959-02-26 1962-01-10 Btr Industries Ltd Improvements in or relating to articles of footwear
GB1379930A (en) * 1972-05-22 1975-01-08 Prestige Group Ltd Method of making domestic kitchen utensils
FR2432137A1 (en) * 1978-07-25 1980-02-22 Seima PROCESS FOR THE PRODUCTION OF AN OPTICAL REFLECTOR AND PARTICULARLY FOR A MOTOR VEHICLE PROJECTOR AND MACHINE FOR ITS IMPLEMENTATION

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0385824A1 (en) * 1989-03-03 1990-09-05 Valeo Vision Method for making a reflector of synthetic material for a lighting device
FR2643849A1 (en) * 1989-03-03 1990-09-07 Valeo Vision METHOD FOR MANUFACTURING A SYNTHETIC MATERIAL REFLECTOR FOR A LIGHTING DEVICE
WO1996030696A1 (en) * 1995-03-28 1996-10-03 Itt Automotive Europe Gmbh Vehicle lamp

Also Published As

Publication number Publication date
IT8120303A0 (en) 1981-03-12
FR2478263A1 (en) 1981-09-18
GB2071559B (en) 1983-06-08
DE3009823A1 (en) 1981-09-24

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PG Patent granted