GB2337322A - Combined fog lamp and high beam lamp for vehicle headlamp - Google Patents
Combined fog lamp and high beam lamp for vehicle headlamp Download PDFInfo
- Publication number
- GB2337322A GB2337322A GB9911065A GB9911065A GB2337322A GB 2337322 A GB2337322 A GB 2337322A GB 9911065 A GB9911065 A GB 9911065A GB 9911065 A GB9911065 A GB 9911065A GB 2337322 A GB2337322 A GB 2337322A
- Authority
- GB
- United Kingdom
- Prior art keywords
- reflector
- reflector unit
- headlamp
- lamp
- light
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/0029—Spatial arrangement
- B60Q1/0041—Spatial arrangement of several lamps in relation to each other
-
- 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
-
- 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
- F21S43/50—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by aesthetic components not otherwise provided for, e.g. decorative trim, partition walls or covers
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
A vehicle headlamp assembly has a low beam lamp unit (18,fig.2) and a combined fog lamp / high beam lamp unit (20,fig.2). The low beam lamp unit comprises a reflector (24,fig.2) and a discharge bulb (22,fig.2). The fog lamp / high beam lamp unit comprises a reflector 30 and an incandescent bulb 28 having double filaments 28a,28b, positioned one in front of the other. The incandescent bulb may be a halogen bulb, with the double filaments arranged in series in the direction of the reflector's 30 optical axis Ax2 and with a shade 28c provided below the front filament 28a. The front view of the headlamp assembly is trapezoidal (fig.1), with the lamp height changing gradually from one side to the other side in, the low beam lamp unit being located where the vertical height is greater.
Description
f 2337322 HEADLAMP ASSEMBLY FOR A VEHICLE The invention of this
application relates to a headlamp assembly for a vehicle which has the function of distributing luminous intensities of both a headlamp and a fog lamp.
As a headlamp assembly for a vehicle, a so-called combination headlamp is known which has not only the function of distributing the luminous intensity of a headlamp but also the function of distributing the luminous intensity of a fog lamp. Many of these combination headlamps are constructed such that a plurality of reflector units are arranged in a lamp chamber formed by a front lens and a lamp body.
In addition, in headlamps for a vehicle in recent years, discharge bulbs have come to be used widely as light sources to attain high intensity for the low beam.
However, if a discharge bulb is used in the aforementioned combination headlamp, the following problem is encountered.
Namely, since the discharge bulb has only a single light-emitting portion, a reflector unit having the discharge bulb is used exclusively for the low beam.
Accordingly, as shown in Fig. 4, in addition to a reflector unit 2 for the low beam, a reflector unit 4 for the high beam and a reflector unit 6 for a fog lamp must be provided in the lamp chamber.
For -Jais reason, the number of reflector units increases, so that the cost 1 - becomes higher correspondingly. In addition, since the space occupied per reflector unit inside the lamp chamber becomes small, the luminous flux of the light reflected from the reflector decreases by that portion.
The invention of this application has been devised in view of the abovedescribed circumstances, and its object is to provide a headlamp assembly for a vehicle which has the ftiriction of distributing the luminous intensities of both a headlamp and a fog lamp, and which, even if the discharge bulb is used, can be manufactured at low cost and can secure a sufficient luminous flux for the light reflected from the reflector of each reflector unit.
In the invention of this application, the above object is attained by using the reflector unit for the high beam and the reflector unit for the fog lamp jointly as one unit.
Namely, in accordance with one of the invention of this application, there is provided a headlamp assembly for a vehicle which has a function of distributing luminous intensities of both a headlamp and a fog lamp and in which a plurality of reflector units each having a light source and a reflector for reflecting light from the light source in a forward direction are arranged in a lamp chamber formed by a front lens and a lamp body, characterized in that the light source of a first reflector unit of the plurality of reflector units is formed by a discharge bulb, and the light source of a second reflector unit thereof is formed by an incandescent bulb having double filaments, and that a light distribution pattern for a low beam of the headlamp is formed by the first reflector unit and the front lens, and a light distribution pattern for a high beam of the headlamp and a light distribution pattern for the fog lamp are formed by the second reflector unit and the front lens.
In the aforementioned "headlamp assembly for a vehicle," insofar as the 2 flinction of distributing luminous intensities of both a headlamp and a fog lamp is provided, the presence or absence of the other functions of luminous intensity distribution (e.g., the functions of luminous intensity distribution of a clearance lamp, a front turn signal lamp, etc. ) is not particularly limited.
In addition, the phrase "by the first reflector unit and the front lens" is a concept which includes any one of a form in which the light distribution pattern is formed by only the first reflector unit, a form in which the light distribution pattern is formed by only the front lens, and a form in which the light distribution pattern is formed by both the first reflector unit and the front lens.
The same also applies to the phrase "by the second reflector unit and the front lens."
As shown in the. above-described arrangement, in the invention of this application, the light source of the first reflector unit is formed by the discharge bulb and the light source of the second reflector unit is formed by the incandescent bulb having the double filaments, and the arrangement provided is such that the light distribution pattern for the low beam is formed by the first reflector unit and the front lens, and the light distribution pattern for the high beam of the headlamp and the light distribution pattern for the fog lamp are formed by the second reflector unit and the front lens. Therefore, it is sufficient to use two reflector units as reflector units necessary for attaining the function of distributing the luminous intensities of the headlamp and the fog lamp. For this reason, one reflector unit can be reduced as compared with the conventional headlamp assembly for a vehicle. The manufacturing cost can be reduced correspondingly. In addition, it is possible to increase the luminous flux of the light reflected from the reflector by enlarging the space occupied per reflector unit inside the lamp chamber.
Thus, in accordance with the invention of this application, in the headlamp - 3 assembly for a vehicle having the function of distributing the luminous intensities of both a headlamp and a fog lamp, even if the discharge bulb is used, the headlamp assembly can be manufactured at low cost and can secure a sufficient luminous flux for the light reflected from the reflector of each reflector unit.
As for the aforementioned %ncandescent bulb," its specific arrangement is not particularly limited insofar as it has double filaments. However, if, as described in another embodiment of this invention, the incandescent bulb is formed by a halogen bulb in which the double filaments are arranged substantially in series in a direction of a optical axis of the second reflector unit, and a shade is provided below the filament located on a front side, the light distribution pattern for the fog lamp can be made into one in which the amount of upwardly scattered light is reduced. In addition, as the incandescent bulb, the high beam and the fog lamp can be made relatively bright.
In addition, in a case where, as described in another embodiment of this invention, the outer configuration of the lamp chamber in a front view is set to a substantially trapezoidal shape in which a vertical width changes gradually from one side to the other side in a horizontal direction, if the first reflector unit is provided, being relatively to the second reflector unit, on a side of the lamp chamber where the vertical width is wider, the low beam having a high frequency of use can be made brighter. With the conventional headlamp assembly for a vehicle which require different reflector units for the high beam and the fog lamp, it has been extremely difficult to adopt such an arrangement in view of the inner space of the lamp chamber. In the invention of this application, however, since only one second reflector unit is sufficient, it becomes easily possible to adopt the above-described arrangement.
In the accaTpany-Jng d.rawings..
Fig. 1 is a front elevational view illustrating a headlamp assembly for a vehicle in accordance with an embodiment of the invention of this application; Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1; Fig. 3 is a cross-sectional view taken along line III-III in Fig. 1; and Fig. 4 is a diagram illustrating a conventional example and corresponding to Fig. 1.
Referring now to the accompanying drawings, a description will be given of an embodiment of the invention of this application.
Fig. 1 is a front view illustrating a headlamp assembly for a vehicle in 10 accordance with an embodiment of the invention of this application, and Figs. 2 and 3 are cross-sectional views taken along line H-II and line III-M in Fig. 1, respectively.
As shown in these drawings, a headlamp 10 in accordance with this embodiment is a combination headlamp having the function of distributing the luminous intensities of both a headlamp and a fog lamp, and is constructed such that two reflector units 18 and 20 are arranged in a lamp chamber 16 formed by a front lens 12 and a lamp body 14, in such a manner as to be tiltable in both vertical and horizontal directions, respectively.
The front lens 12 is a transparent lens, and the two reflector units 18 and 20 are provided with the function of controlling the luminous intensity distribution.
As for the lamp chamber 16, its outer configuration in a front view is set to a substantially trapezoidal shape in which the vertical width changes gradually from one side to the other side in the horizontal direction, and the reflector unit 18 (a first reflector unit) is provided on the side of the lamp chamber where the vertical width is wider, while the reflector unit 20 (a second reflector unit) is provided on the side where the vertical width is narrower.
- 5 The reflector unit 18 has a discharge bulb 22 (light source), a reflector 24, and a shade 26.
The discharge bulb 22 is a metal halide bulb, and is fixed to and supported by the reflector 24 such that a light-emitting portion 22a is located on an optical axis Ax 1 of the reflector unit 18.
The reflector 24 has a reflecting surface 24a on which a plurality of reflecting elements 24s are formed on a paraboloid of revolution having the optical axis Axl as its center axis, and -is adapted to form a light distribution pattern for the low beam of the headlamp by deflecting, diffusing, and reflecting the light from the discharge bulb 22 in the forward direction.
The shade 26 is provided on the front side of the discharge bulb 22, and is adapted to cut off the direct light emitted from the discharge bulb 22 in the forward direction.
Meanwhile, the reflector unit 20 has an incandescent bulb 28 (light source), a reflector 30, and a shade 32.
The incandescent bulb 28 is a so-called H4-type halogen bulb, and double filaments 28a and 28b are arranged substantially in series in the direction of an optical axis Ax2 of the reflector unit 20. The filament 28a located on the front side is located on the optical axis Ax2, and a shade 28c is provided therebelow in a close proximity to it.
Meanwhile, the filament 28b located on the rear side is located on a slightly lower side from the optical axis Ax2.
The reflector 30 has a reflecting surface 30a on which a plurality of reflecting elements 30s are formed on a paraboloid of revolution having the optical axis Ax2 as its center axis, and is adapted to form a light distribution pattern for the high beam of the headlamp and a light distribution pattern for the fog lamp by deflecting, diffusing, and - 6 reflecting the light from the incandescent bulb 28 in the forward direction. The light distribution pattern for the high beam of the headlamp is formed by the light from the filament 28b on the rear side, while the light distribution pattern for the fog lamp is formed by the light from the filament 28a on the front side.
The shade 32 is provided on the front side of the incandescent bulb 28, and is adapted to cut off the direct light emitted from the incandescent bulb 28 in the forward direction.
An extension panel 34 for covering peripheral portions of the two reflector units 18 and 20 is provided between the front lens 12 and the two reflector units 18 and 20 inside the lamp chamber 16.
As shown in Fig. 3, since the light directed downwardly ftom the filament 28a on the front side is cut off by the shade 28c, a sufficient luminous flux can be secured for the light reflected from the fog lamp by setting the optical axis Ax2 at a position slightly lower than the position of the vertical center of the reflecting surface 30a. It should be noted that, in Fig. 3, the beam indicated by TOW is the luminous flux of the light reflected from the fog lamp, while the beam indicated by "HIGH" is the luminous flux of the reflected light for the high beam.
As described above in detail, in this embodiment, the light source of the reflector unit 18 is formed by the discharge bulb 22 and the light source of the reflector unit 20 is formed by the incandescent bulb 28 having the double filaments 28a and 28b, and the arrangement provided is such that the light distribution pattern for the low beam is formed by the reflector unit 18, and the light distribution pattern for the high beam and the light distribution pattern for the fog lamp are formed by the reflector unit 20. Tberefore, it is sufficient to use two reflector units as reflector units necessary for attaining the function of distributing the luminous inteusities of the headlamp and the fog lamp. For this reason, 7 one reflector unit can be reduced as compared with the conventional headlamp assembly for a vehicle. The manufacturing cost can be reduced correspondingly. In addition, it is possible to increase the luminous flux of the light reflected from the reflector by enlarging the space occupied per reflector unit inside the lamp chamber.
Thus, in accordance with this embodiment, in the headlamp assembly for a vehicle having the function of distributing the luminous intensities of both a headlamp and a fog lamp, even if the discharge bulb is used, the headlamp assembly can be manufactured at low cost and can secure a sufficient luminous flux for the light reflected from the reflector of each reflector unit.
Particularly in this embodiment, since the outer configuration of the lamp chamber 16 in a front view is set to a substantially trapezoidal shape in which the vertical width changes gradually from one side to the other side in the horizontal direction, and the reflector unit 18 for the low beam is provided, being relatively to the reflector unit 20, on the side of the lamp chamber where the vertical width is wider, thus the low beam which has a high frequency of use.can be made brighter. Meanwhile, if such an arrangement is adopted, the remaining inner space of the lamp chamber tends to be smaller, however, since the arrangement provided in this embodiment is such that the light distribution pattern for the high beam and the light distribution pattern for the fog lamp are formed by the same reflector unit 20, it is possible to secure sufficient quantities of light for the high 20 beam and the fog lamp despite the fact that the inner space of the lamp chamber is limited.
Moreover, in this embodiment, since the incandescent bulb 28 is formed by a halogen bulb in which the double filaments 28a and 28b are arranged substantially in series in the direction of the optical axis Ax2 of the reflector unit 20, and the shade 28c is provided below the filament 28a located on the front side, the light distribution pattern for 25 the fog lamp can be made into one in which the amount of upwardly scattered light is - 8 reduced. In addition, as the incandescent bulb, the high beam and the fog lamp can be made relatively bright.
At that juncture, since the optical axis M2 of the reflector unit 20 is set at a position slightly lower than the position of the vertical center of the reflecting surface 30a, it is possible to secure a sufficient quantity of light for the fog lamp despite the fact that the light directed downwardly from the filament 28a for the fog lamp is cut off by the shade 28c.
In this embodiment, a description has been given of lighting equipment in which the front lens 12 is a transparent lens and the two reflector units 18 and 20 are arranged to perform the function of controlling all the luminous intensities. However, even with the lighting equipment and the like in which the function of controlling luminous intensities is performed by lens steps formed on the front lens 12, it is possible to obtain similar advantages in operation similar to those of this embodiment by adopting an arrangement similar to that of this embodiment.
9 -
Claims (3)
1. A headlamp assembly for a vehicle which has a function of distributing luminous intensities of both a headlamp and a fog lamp and in which a plurality of reflector units each having a light source and a reflector for reflecting light from the light source in a forward direction are arranged in a lamp chamber formed by a front lens and a lamp body, characterized in that the light source of a first reflector unit of said plurality of reflector units is formed by a discharge bulb, and the light source of a second reflector unit thereof is formed by an incandescent bulb having double filaments, and that a light distribution pattern for a low beam of said headlamp is formed by said first reflector unit, and a light distribution pattern for a high beam of said headlamp and a light distribution pattern for said fog lamp are formed by said second reflector unit.
2. The headlamp assembly for a vehicle according to claim 1, wherein said incandescent bulb is formed by a halogen bulb in which said double filaments are arranged substantially in series in a direction of a optical axis of said second reflector unit, and a shade is provided below said filament that is located on a front side.
3. The headlamp assembly for a vehicle according to claim 1 or 2, wherein an outer configuration of said lamp chamber in a front view is set to a substantially trapezoidal shape in which a vertical width changes gradually from one side to the other side in a horizontal direction, and said first reflector unit is provided, being relatively to said second reflector unit, on a side of said lamp chamber where the vertical width is wider.
- 10
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10150692A JPH11329012A (en) | 1998-05-14 | 1998-05-14 | Vehicular headlamp |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9911065D0 GB9911065D0 (en) | 1999-07-14 |
| GB2337322A true GB2337322A (en) | 1999-11-17 |
| GB2337322B GB2337322B (en) | 2000-07-19 |
Family
ID=15502370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9911065A Expired - Fee Related GB2337322B (en) | 1998-05-14 | 1999-05-12 | Headlamp assembly for a vehicle |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JPH11329012A (en) |
| CN (1) | CN1097697C (en) |
| DE (1) | DE19922283B4 (en) |
| GB (1) | GB2337322B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2350882A (en) * | 1999-03-26 | 2000-12-13 | Koito Mfg Co Ltd | Vehicle headlamp with auxiliary beam |
| RU2460010C2 (en) * | 2005-03-01 | 2012-08-27 | Хд Девелопментс (Проприетари) Лимитед | Lamp having light-emitting diode as light source |
| US20170023200A1 (en) * | 2015-07-24 | 2017-01-26 | Ford Global Technologies, Llc | Headlamp assembly |
| US11959630B2 (en) | 2019-08-08 | 2024-04-16 | Sgm Light A/S | Lighting device with motorised collimation control |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10016217A1 (en) * | 2000-03-31 | 2001-10-04 | Hella Kg Hueck & Co | Headlights for an airplane |
| FR2897672B1 (en) * | 2006-02-22 | 2008-07-04 | Peugeot Citroen Automobiles Sa | OPTICAL BLOCK HAS ILLUMINATED FUNCTIONS |
| CN103162109B (en) * | 2011-12-14 | 2015-11-18 | 海洋王照明科技股份有限公司 | A kind of light fixture of adjustable light beam width |
| DE102015102214A1 (en) * | 2015-02-17 | 2016-08-18 | Valeo Schalter Und Sensoren Gmbh | Illumination device for illuminating an interior and motor vehicle |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2155608A (en) * | 1984-03-07 | 1985-09-25 | Stanley Electric Co Ltd | Vehicle headlamp |
| US4587601A (en) * | 1981-07-23 | 1986-05-06 | Collins Dynamics, Inc. | Combined flood and spot light incorporating a reflector member of circular and parabolic longitudinal cross section |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19645625A1 (en) * | 1996-11-06 | 1998-05-07 | Bosch Gmbh Robert | Vehicle headlamp unit |
-
1998
- 1998-05-14 JP JP10150692A patent/JPH11329012A/en active Pending
-
1999
- 1999-05-12 GB GB9911065A patent/GB2337322B/en not_active Expired - Fee Related
- 1999-05-13 CN CN99106489A patent/CN1097697C/en not_active Expired - Fee Related
- 1999-05-14 DE DE19922283A patent/DE19922283B4/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587601A (en) * | 1981-07-23 | 1986-05-06 | Collins Dynamics, Inc. | Combined flood and spot light incorporating a reflector member of circular and parabolic longitudinal cross section |
| GB2155608A (en) * | 1984-03-07 | 1985-09-25 | Stanley Electric Co Ltd | Vehicle headlamp |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2350882A (en) * | 1999-03-26 | 2000-12-13 | Koito Mfg Co Ltd | Vehicle headlamp with auxiliary beam |
| GB2350882B (en) * | 1999-03-26 | 2002-09-25 | Koito Mfg Co Ltd | Vehicular headlamp apparatus |
| US7021791B1 (en) | 1999-03-26 | 2006-04-04 | Koito Manufacturing Co., Ltd. | Vehicular headlamp apparatus |
| RU2460010C2 (en) * | 2005-03-01 | 2012-08-27 | Хд Девелопментс (Проприетари) Лимитед | Lamp having light-emitting diode as light source |
| US20170023200A1 (en) * | 2015-07-24 | 2017-01-26 | Ford Global Technologies, Llc | Headlamp assembly |
| US11959630B2 (en) | 2019-08-08 | 2024-04-16 | Sgm Light A/S | Lighting device with motorised collimation control |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1097697C (en) | 2003-01-01 |
| DE19922283A1 (en) | 1999-12-02 |
| DE19922283B4 (en) | 2005-06-30 |
| GB9911065D0 (en) | 1999-07-14 |
| CN1236076A (en) | 1999-11-24 |
| JPH11329012A (en) | 1999-11-30 |
| GB2337322B (en) | 2000-07-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20070512 |