WO1991019937A1 - Scheinwerfer für kraftfahrzeuge - Google Patents
Scheinwerfer für kraftfahrzeuge Download PDFInfo
- Publication number
- WO1991019937A1 WO1991019937A1 PCT/DE1991/000426 DE9100426W WO9119937A1 WO 1991019937 A1 WO1991019937 A1 WO 1991019937A1 DE 9100426 W DE9100426 W DE 9100426W WO 9119937 A1 WO9119937 A1 WO 9119937A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- envelope
- discharge lamp
- light
- bulb
- envelope bulb
- Prior art date
Links
- 239000011521 glass Substances 0.000 claims abstract description 10
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 239000004020 conductor Substances 0.000 claims description 21
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004904 UV filter Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000005341 toughened glass Substances 0.000 description 1
Classifications
-
- 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
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
- F21V9/06—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters for filtering out ultraviolet radiation
-
- 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
- F21S41/17—Discharge light sources
- F21S41/172—High-intensity discharge light sources
-
- 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
- F21V25/00—Safety devices structurally associated with lighting devices
- F21V25/02—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken
- F21V25/04—Safety devices structurally associated with lighting devices coming into action when lighting device is disturbed, dismounted, or broken breaking the electric circuit
-
- 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
- F21S41/40—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades
- F21S41/43—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by screens, non-reflecting members, light-shielding members or fixed shades characterised by the shape 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
- F21S41/50—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
Definitions
- the invention relates to a headlight according to the preamble of claim 1.
- Such a headlight is known from EP-Al-0237 647.
- This headlight has a discharge lamp, the discharge vessel of which is surrounded by an envelope bulb made of tempered glass.
- the discharge vessel is melted into the envelope bulb, so that these parts are combined to form a unit.
- the space between the envelope bulb and the discharge vessel is evacuated.
- the envelope bulb is provided in sections with an opaque coating, by means of which an asymmetrical light distribution required in low beam headlights is achieved.
- the TJV-A and UV-B light component of the light emitted by the discharge lamp is blocked to a certain extent by the envelope bulb, since glass, due to its properties, generally inhibits the passage of these components.
- the UV-C light component which is particularly harmful to health and also destroys plastics, is not blocked by an enveloping bulb which consists solely of ordinary glass.
- an enveloping bulb which consists solely of ordinary glass.
- the headlamp according to the invention with the characterizing features of claim 1 has the advantage that the envelope bulb, above all, also blocks the UV-C light component and thus there is no risk of health and no risk of destruction for plastic parts.
- the danger of burns is reduced by the envelope bulb, since it is not possible to touch the discharge lamp directly, but only the envelope bulb which reaches a substantially lower temperature than the discharge lamp. Touching the electrical connections of the discharge lamp is also prevented by the envelope bulb.
- the refinement of the headlamp according to claim 2 further increases the safety since the discharge lamp cannot be operated when the conductor tracks are damaged and the envelope bulb is damaged, and even when the envelope bulb is not mounted.
- the envelope piston also serves as a holder for the objective. With the embodiment according to claim 7 it is achieved that the discharge lamp cannot be operated when the lens is not inserted or damaged. Due to the design of the receptacle according to claim 12, the envelope piston is easily assembled.
- the envelope piston also serves as a support for the cover, so that no separate component is required for this.
- FIG. 1 shows a first exemplary embodiment of a headlamp in a simplified representation in longitudinal section
- FIG. 2 shows an envelope bulb of the headlamp of FIG. 1 in a perspective representation
- FIG. 3 shows a second exemplary embodiment with a headlamp according to the projection principle in longitudinal section in a greatly simplified representation.
- a headlight for motor vehicles shown in FIG. 1 with a first exemplary embodiment has a housing 10 made of plastic, in which a reflector 11 is arranged.
- the light exit opening of the housing 10 is covered with a lens 12.
- the housing 10 has on its rear side an opening 16 through which the discharge lamp 14 can be inserted or removed and which can be closed with a cap 17.
- the discharge lamp 14 is supplied with the high voltage necessary for its operation by a ballast 18 controlled by the vehicle electrical system.
- the discharge lamp 14 is thus arranged in a space closed off from the lamp holder 13 and the envelope bulb 19.
- the distance between the discharge lamp and the envelope bulb is larger than the diameter of the discharge vessel the discharge lamp.
- the bottom 22 of the envelope bulb 19 pointing in the direction of the light emerging from the reflector 11 is provided with an opaque coating 23, so that the light emerging directly from the discharge lamp 14 is shielded.
- the glass material of the envelope bulb 19 or a filter coating applied to it blocks the UV light emitted by the discharge lamp 14 in the UV-A, UV-B and UV-C range, so that no harmful UV radiation acts on the housing 10 or emerges from the headlight.
- the receptacle 21 for the envelope bulb 19 in the lamp holder 13 is designed in the manner of a crown, with radially elastic curved spring tabs 24 arranged on its circumference, in which the open end of the envelope bulb 19, which is provided with a radially outward-pointing, circumferential projection 26, can be latched .
- the envelope bulb can also be fastened in the lamp support in another way, for example in a thread-like manner.
- two diametrically opposite conductor tracks 27 are arranged, which extend parallel to the longitudinal axis 28 of the envelope piston from its open end to its bottom 22.
- the conductor tracks 27 are connected to one another by a conductor section 29 encompassing the circumference of the enveloping piston.
- the conductor tracks 27, 29 are evaporated onto the enveloping bulb 19 and connected in series via contacts in the receptacle 21 with a supply line from the vehicle electrical system to the ballast 18, and thus part of the supply line. Due to this circuit, only the low voltage of the vehicle electrical system is present on the conductor tracks 27 and the discharge lamp 14 can only be operated when the envelope bulb 19 is inserted and the conductor tracks 27, 29 are intact.
- the conductor tracks 27, 29 can also be part of a control line which is connected to the ballast 18, the ballast preventing operation of the discharge lamp 14 when the control line 30 is interrupted.
- the envelope bulb 19 prevents the discharge lamp 14 from being touched during operation. When the conductor tracks 27, 29 are touched on the envelope bulb 19, there is no danger to life, in contrast to the high-voltage connections of the discharge lamp, the contact of which is prevented by the envelope bulb 19. In addition, the envelope bulb 19 acts as a shield against glass pieces of the discharge lamp which are thrown away in the event of an explosion of the discharge lamp 14 filled with high-pressure gas.
- an opaque coating 32 is applied to the envelope bulb 19, which serves to form a light-dark boundary in the light distribution generated by the headlight.
- the coating 32 can be applied to the inner or outer surface of the envelope piston 19.
- the course of the edge 33 of the coating 32 depends on the desired course of the light-dark boundary.
- the envelope piston 19 can be enlarged in the area of the coating 32.
- FIG. 3 shows a second exemplary embodiment with a headlight based on the projection principle.
- This headlight has a reflector 31, in the horizontal and vertical center section of which ellipses result.
- the discharge lamp 14 is inserted into the reflector 31 via the lamp holder 13.
- Arranged in the direction of the light reflected by the reflector 31 is an aperture 41 with an optically effective upper edge 42 and an objective 43, which images the upper edge 42 of the aperture 41 as the light-dark boundary of the light distribution.
- the discharge lamp 14 is surrounded by a glass envelope bulb 39 which, as in the first exemplary embodiment described, is designed as a UV filter and is inserted into a receptacle 44 arranged on the front edge of the reflector 31.
- the diaphragm 41 is also held in the receptacle 44 and arranged within the envelope piston 39.
- the end of the envelope bulb 39 pointing in the light exit direction receives the objective 43, wherein no UV radiation can escape between the envelope bulb 39 and the objective 43.
- the lens 43 like the envelope piston 39, is designed as a UV filter.
- the discharge lamp 14 is thus arranged in a space delimited by the lamp holder 13, the reflector 31 and the envelope bulb 39 and the objective 43 and is completely shielded.
- Two electrical conductor tracks 46 are arranged diametrically opposite one another on the envelope piston 39 and extend parallel to its longitudinal axis from the receptacle 44 to the front end of the envelope piston 39.
- An annular conductor section 47 is arranged on the objective 43 facing the enveloping piston, through which the conductor tracks 46 are connected to one another when the objective 43 is inserted into the enveloping piston 39.
- the conductor tracks 46 are connected by contacts in the receptacle 44 to the electrical line 30, which, as described in the first exemplary embodiment, can be a supply line from the electrical electrical system or a control line to the ballast 18.
- the receptacle 44 for the envelope piston 39 can also be crown-like, as described in the first exemplary embodiment.
- An additional reflector 49 which has no influence on the light distribution and is used to produce a desired appearance of the headlamp, for example a rectangular or round appearance, is then arranged on the reflector 31 in the light exit direction.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEP4019587.2 | 1990-06-20 | ||
DE4019587A DE4019587A1 (de) | 1990-06-20 | 1990-06-20 | Scheinwerfer fuer kraftfahrzeuge |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991019937A1 true WO1991019937A1 (de) | 1991-12-26 |
Family
ID=6408696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1991/000426 WO1991019937A1 (de) | 1990-06-20 | 1991-05-23 | Scheinwerfer für kraftfahrzeuge |
Country Status (5)
Country | Link |
---|---|
US (1) | US5260856A (de) |
EP (1) | EP0487665A1 (de) |
JP (1) | JPH05501330A (de) |
DE (1) | DE4019587A1 (de) |
WO (1) | WO1991019937A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3163569B2 (ja) * | 1992-02-18 | 2001-05-08 | 株式会社小糸製作所 | 自動車用ヘッドランプ |
DE4225303A1 (de) * | 1992-07-31 | 1994-02-03 | Bosch Gmbh Robert | Scheinwerfer für Kraftfahrzeuge |
US5299279A (en) * | 1992-12-01 | 1994-03-29 | Ilc Technology, Inc. | Short arc lamp soldering device |
US5497298A (en) * | 1994-12-12 | 1996-03-05 | General Motors Corporation | Headlamp assembly with coil spring bulb shield |
JP3061248B2 (ja) * | 1995-01-20 | 2000-07-10 | 株式会社小糸製作所 | 自動車用ヘッドランプ |
JP3791626B2 (ja) * | 1995-12-22 | 2006-06-28 | 株式会社小糸製作所 | 車輌用前照灯 |
JP3607019B2 (ja) * | 1996-10-17 | 2005-01-05 | 株式会社小糸製作所 | 車輌用灯具 |
FR2757808B1 (fr) * | 1996-12-26 | 1999-03-19 | Valeo Vision | Projecteur de vehicule automobile pourvu d'un enjoliveur de style |
JP2002093209A (ja) * | 2000-09-11 | 2002-03-29 | Koito Mfg Co Ltd | 車両用灯具 |
DE10251960A1 (de) * | 2002-11-08 | 2004-05-19 | Philips Intellectual Property & Standards Gmbh | Reflektorlampe |
WO2009138913A2 (en) * | 2008-05-14 | 2009-11-19 | Philips Intellectual Property & Standards Gmbh | Headlamp and lamp for use in a headlamp |
US20110110070A1 (en) * | 2009-11-06 | 2011-05-12 | Kim Henry Hyung Kwang | Reflecting cap for enhancing illuminance of illumination |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1583987A (de) * | 1968-06-24 | 1969-12-12 | ||
FR2158650A5 (de) * | 1971-10-27 | 1973-06-15 | Loing Verreries | |
DE2854110A1 (de) * | 1978-12-14 | 1980-06-26 | Siemens Ag | Einrichtung bei einer lichtzeichenanlage |
DE3304036A1 (de) * | 1983-02-07 | 1984-08-09 | Fritz 3000 Hannover Gaum | Strahlenschutzfilter-anordnung fuer lichttechnische anlagen mit hochdruck- oder mitteldruck-entladungslampen |
DE8803881U1 (de) * | 1988-03-22 | 1988-05-11 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De | |
FR2652317A1 (fr) * | 1989-09-27 | 1991-03-29 | Bosch Gmbh Robert | Dispositif d'eclairage pour vehicules notamment pour permettre une zone de vision etendue en position de croissement. |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2788533B2 (ja) * | 1990-04-20 | 1998-08-20 | 株式会社小糸製作所 | 自動車用ヘッドランプ |
JP2691945B2 (ja) * | 1990-05-18 | 1997-12-17 | 株式会社小糸製作所 | 車輌用前照灯 |
CA2050179A1 (en) * | 1990-08-31 | 1992-03-01 | Yukio Wakimizu | Vehicular headlamp of the projection type |
JPH0782761B2 (ja) * | 1990-09-26 | 1995-09-06 | 株式会社小糸製作所 | クリアランスランプ一体型自動車用ヘッドランプ |
US5107405A (en) * | 1991-08-20 | 1992-04-21 | Koito Manufacturing Co., Ltd. | Motor vehicle headlamp |
-
1990
- 1990-06-20 DE DE4019587A patent/DE4019587A1/de not_active Withdrawn
-
1991
- 1991-05-23 WO PCT/DE1991/000426 patent/WO1991019937A1/de not_active Application Discontinuation
- 1991-05-23 US US07/828,811 patent/US5260856A/en not_active Expired - Fee Related
- 1991-05-23 EP EP91909669A patent/EP0487665A1/de not_active Ceased
- 1991-05-23 JP JP3509062A patent/JPH05501330A/ja active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1583987A (de) * | 1968-06-24 | 1969-12-12 | ||
FR2158650A5 (de) * | 1971-10-27 | 1973-06-15 | Loing Verreries | |
DE2854110A1 (de) * | 1978-12-14 | 1980-06-26 | Siemens Ag | Einrichtung bei einer lichtzeichenanlage |
DE3304036A1 (de) * | 1983-02-07 | 1984-08-09 | Fritz 3000 Hannover Gaum | Strahlenschutzfilter-anordnung fuer lichttechnische anlagen mit hochdruck- oder mitteldruck-entladungslampen |
DE8803881U1 (de) * | 1988-03-22 | 1988-05-11 | Patent-Treuhand-Gesellschaft Fuer Elektrische Gluehlampen Mbh, 8000 Muenchen, De | |
FR2652317A1 (fr) * | 1989-09-27 | 1991-03-29 | Bosch Gmbh Robert | Dispositif d'eclairage pour vehicules notamment pour permettre une zone de vision etendue en position de croissement. |
Also Published As
Publication number | Publication date |
---|---|
DE4019587A1 (de) | 1992-01-02 |
US5260856A (en) | 1993-11-09 |
EP0487665A1 (de) | 1992-06-03 |
JPH05501330A (ja) | 1993-03-11 |
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