EP4204733A1 - Kraftfahrzeugscheinwerfer - Google Patents
KraftfahrzeugscheinwerferInfo
- Publication number
- EP4204733A1 EP4204733A1 EP21755969.9A EP21755969A EP4204733A1 EP 4204733 A1 EP4204733 A1 EP 4204733A1 EP 21755969 A EP21755969 A EP 21755969A EP 4204733 A1 EP4204733 A1 EP 4204733A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- low
- reflector
- beam module
- motor vehicle
- low beam
- 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
-
- 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
- F21S41/141—Light emitting diodes [LED]
- F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
-
- 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
- F21S41/141—Light emitting diodes [LED]
- F21S41/151—Light emitting diodes [LED] arranged in one or more lines
-
- 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
- F21S41/192—Details of lamp holders, terminals or connectors
-
- 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
- F21S41/39—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
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/40—Cooling of lighting devices
- F21S45/47—Passive cooling, e.g. using fins, thermal conductive elements or openings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2102/00—Exterior vehicle lighting devices for illuminating purposes
- F21W2102/10—Arrangement or contour of the emitted light
- F21W2102/13—Arrangement or contour of the emitted light for high-beam region or low-beam region
Definitions
- the invention relates to a motor vehicle headlight with an adjustable low beam, comprising at least two low beam modules for jointly emitting a low beam distribution, each low beam module being set up to emit a portion of the low beam distribution with a predeterminable light intensity, so that a common low beam distribution results from the superimposition of the low beam distribution components.
- each low beam module being assigned at least one light source, each low beam module comprising a reflector having at least one focal point or a focal line, and at least one light source being arranged in the focal point or a focal line of the reflector, and each The low-beam module reflector is designed in such a way that the light distribution emitted by each low-beam module and also the light-dark boundary of the respective low-beam distribution in connection with the mounting position of the low-beam module reflector is finally defined, with the low-beam module reflector for defining the course of a light-dark boundary of the respective proportion the low beam distribution has at least one edge in the reflector surface that forms this boundary, and
- At least one heat sink on which the light source carrier and the low beam modules are attached At least one heat sink on which the light source carrier and the low beam modules are attached.
- Such motor vehicle headlights have become known from the prior art.
- care must be taken to ensure that the individual low-beam modules, which can basically have the same radiation characteristics, are correctly assembled in relation to one another, so that the light-dark boundaries of the respective modules are in the form of the projected Light distribution become visible, coincide with each other. Since the position of the cut-off line is critical and typically has to meet legal requirements, many motor vehicle headlamp systems have so far used low beam modules that consist of a single imaging system, so that it is not necessary to superimpose similar light distributions on one another and to align them precisely with one another .
- One object of the invention is therefore to create a motor vehicle headlight of the type mentioned at the outset that can be produced more cost-effectively.
- This object is achieved with a motor vehicle headlight of the type mentioned at the outset, in which, according to the invention, at least one of the low beam module reflectors can be fixedly connected to the heat sink in an adjustable manner via a respective reflector holder, with each reflector holder having at least one guide section, and each adjustable low beam module reflector having a corresponding engagement section for engaging in the Has a guide section, wherein the guide section of the reflector holder is designed in such a way that a low-beam module reflector that is in engagement with the reflector holder can be continuously rotated along a section of a circular path and can be set and fixed in any rotational position in relation to the reflector holder within a rotational range defined thereby, the Guide section is designed in such a way that the center of the circular path with the focal point of the adjustable low beam module reflector together ammen falls or lies on the focal line
- the modules can be aligned with each other so that the headlight is finally checked with regard to its light distribution and optimized at the same time.
- the mechanical connection of the reflector very close to the light source (e.g. LED). This has the advantage of a short tolerance chain from the light source to the reflector, which also means that costs can be saved.
- Defocusing can be avoided with this adjustment concept, which is of particular advantage in the case of small reflectors, since defocusing would severely distort the light image and there may then be problems in meeting legal requirements.
- Small reflectors are very sensitive to tolerances on changes in position to the LED, which is why conventional adjustment kinematics, which provide for example a partial deformation of the reflector (e.g. targeted "squeezing" of reflectors), are not expedient.
- the adjustment kinematics described in the invention offer the particular advantage that with a rotation around the focal point, the light distribution itself remains unchanged.
- the number of light sources can be chosen freely and is not limited to a specific number. Exactly one light source or also two or more light sources could be provided per low beam module.
- the adjustable low beam module reflector rotates around a horizontal axis so that the height of the cut-off line can be adjusted.
- the expression “horizontal” refers to the final installation position in a motor vehicle, which is on a horizontal plane - i.e. also oriented horizontally. Under the expression, according to which "the light distribution emitted by each low-beam module and also the light-dark boundary of the respective low beam distribution in connection with the mounting position of the low beam module reflector is finally determined" it is understood that no projection lenses or other light-shaping components are attached to the respective
- Low beam module reflector are connected downstream, but this is the last link in the light-forming optical chain of the low beam module and the
- the low beam module reflector thus - depending on its position and orientation - determines the final position of the light-dark boundary in its projection, with the projections of individual low beam modules of course being superimposed on one another as already described above.
- the light source carrier is arranged between the heat sink and the low beam module reflectors.
- the guide section of each reflector holder has a shell-shaped or cylinder jacket segment-shaped surface and the engagement section of each adjustable low beam module reflector is designed correspondingly, so that a positive sliding of the engagement section along the guide section is enabled. In this way a robust adjustment mechanism is created.
- a threaded hole for receiving the thread of a screw is formed in the engagement section of each adjustable low-beam module reflector, and a corresponding elongated hole for receiving a fastening screw is arranged in the guide section of each reflector holder, the elongated hole being designed in such a way that a fastening screw any position of the adjustable low beam module reflector along the entire range of rotation can be inserted through the elongated hole into the threaded hole of the adjustable low beam module reflector, thus enabling the adjustable low beam module reflector to be fixed in relation to the respective reflector holder. This enables continuous adjustment and fixation in any adjustment position.
- a bore is formed in the guide section and in the engagement section, which is designed to positively receive a fixing pin, which connects the guide section and the engagement section to one another in the received state and thus defines a reference position within the rotation range.
- a reference position can be specified, which can be used as the starting position.
- This reference position can be selected in such a way that it corresponds to the expected optimal setting position and thus offers the best starting point for the check.
- a further adjustment can thus be dispensed with--namely, if the expected optimum adjustment position corresponds to the checked, established optimum adjustment position. In the event of a deviation from the ascertained optimum adjustment position, an optimum readjustment can be carried out quickly.
- the motor vehicle headlight has exactly two low-beam modules, and the low-beam module reflector of one of the two low-beam modules is fixed immovably and the low-beam module reflector of the remaining low beam module is adjustable via a reflector holder fixed to the heat sink.
- a low-beam module reflector can thus be of particularly simple design in terms of construction, in that it can be installed in a fixed manner without an adjustment mechanism being required for this purpose. The remaining reflectors can still be adjusted, so that overall an exact superimposition of the light-dark boundaries is possible.
- the light source is an LED light source.
- the light source is arranged in the focal point or in the focal line of the respective low beam module reflector.
- the light distribution is only changed in its position, without manipulating the light image itself (ie the composition of the light distribution as a normal projection, regardless of its position).
- the light source is arranged in such a way that the center point of the circular path of the rotary range of the adjustable low beam module reflector coincides with the center of gravity of the light emission surface of the light source. Since the light sources typically have a certain degree of flat radiation, changes in the light pattern when the low-beam module reflector is rotated can be minimized.
- the emitting light surface of the LED is usually a rectangle or square.
- the focal point of the LED is in the geometric mean of the emitter surface.
- the reflector is rotated around the center of the focal point because this is where most of the light is.
- the low beam design can be rotated around the outer edge (of the emitter surface) for a better defined light/dark line (on the road).
- one of the at least two low-beam module reflectors is permanently connected to the heat sink in an immovable manner.
- Non-adjustable means that no reflector holder with guide devices is required or provided, but rather the low beam module reflector can be bolted immovably directly to the heat sink.
- the light-shaping reflection surfaces of the low-beam module reflectors are designed in the same way.
- the reflectors are the same on the inside, ie in the optically active area facing the light source.
- the individual parts of the low beam distribution can be configured in a completely identical manner.
- the light sources assigned to the reflectors can also be the same. It is also possible for the low beam modules to be completely identical in their entirety.
- the motor vehicle headlight additionally has low beam modules for generating a low beam distribution.
- FIG. 1 shows a schematic representation of a motor vehicle headlight according to the invention
- FIG. 2 shows a detailed illustration of the rear side of the low-beam modules of the headlight according to FIG. 1,
- FIG. 3 shows a sectional view of an adjustable low beam module reflector of the headlight according to Figures 1 to 2 in a first Eage El
- FIG. 4 shows a sectional view of the adjustable low beam module reflector
- Figure 5 is a rear view of the adjustable low beam module reflector of Figures 3 and 4.
- FIG. 1 shows a schematic representation of a motor vehicle headlight 1 according to the invention with an adjustable low beam.
- This motor vehicle headlight 1 comprises at least two low-beam modules 2 for joint emission of a low-beam distribution, each low-beam module 2 being set up to emit a portion of the low-beam distribution with a predeterminable light intensity, so that a common low-beam distribution is created by superimposing the low-beam distribution components.
- the headlight 1 comprises at least one light source carrier 3 with a number of light sources 4, with each low beam module 2 being assigned at least one light source 4.
- Each low beam module 2 includes a reflector 2a with at least one focal point P (see Figure 3) or a focal line.
- the at least one light source 4 is arranged in the focal point P or the focal line of the reflector 2a.
- Each low-beam module reflector 2a is designed in such a way that the light distribution emitted by each low-beam module 2 and also the light-dark boundary of the respective low-beam distribution in connection with the mounting position of the low-beam module reflector 2a is finally defined, with the low-beam module reflector 2a for defining the course of a light-dark -Limit of the respective portion of the low beam distribution has at least one edge K (see FIG. 3) in the reflector surface that depicts this limit.
- the headlight 1 also includes at least one heat sink 5, on which the light source carrier 3 and the low beam modules 2 are attached. The light source carrier 3 is between the heat sink 5 and the low-beam module reflectors 2a, 2al and 2a2, respectively.
- the motor vehicle headlight 1 also includes low beam modules 6 for generating a low beam distribution. These low beam modules 6 are firmly connected to the heat sink 5 .
- the light modules 2 and 6 are encased in a housing 10 which, for example, can also be designed in one piece with the heat sink 5 .
- two low-beam module reflectors 2a are provided, with one of the low-beam module reflectors 2a being permanently mounted, namely the low-beam module reflector, which is referenced with the reference numeral 2al (see Fig. 2 and 3 ).
- the low beam module reflector 2a2 is adjustable in that it can be slid and firmly connected to the heat sink 5 via a reflector holder 2b.
- the reflector holder 2b has at least one guide section 2b' (see FIGS. 3 and 4), and the adjustable low beam module reflector 2a2 has a corresponding engagement section 2a' for engaging in the guide section 2b'.
- the guide section 2b' of the reflector holder 2b is designed in such a way that the low-beam module reflector 2a2 that engages with the reflector holder 2b is continuously rotated along a section of a circular path B and can be set and fixed in any rotational position in relation to the reflector holder 2b within a rotational range defined by this can.
- a guide groove 9 can be seen in the guide section 2a', into which a projection of the reflector holder 2b, not shown in the figures, engages.
- the guide groove 9 extends like a circular segment around the center point of the circular path B, so that the adjustable low beam module reflector 2a2 can be rotated along the groove 9 about the center point of the circular path B.
- FIG. 3 shows the low beam module reflector 2a2 in a first position LI.
- the guide section 2b' is designed in such a way that the center point of the circular path B coincides with the focal point P of the adjustable low-beam module reflector 2a2.
- a focal line could also be provided.
- each reflector holder 2b has a cup-shaped or cylinder jacket segment-shaped surface, wherein the engagement portion 2a' each adjustable low-beam module reflector 2a2 is designed to correspond thereto, so that a positive sliding of the engagement portion 2a 'along the guide portion 2b' is made possible.
- a threaded hole 7a for receiving the thread of a screw (not shown in the figures) is formed in the engaging portion 2a' of each adjustable low-beam module reflector 2a2, and a corresponding angular hole 7b for receiving a fastening screw is arranged in the guide portion 2b' of each reflector holder 2b.
- Eangloch 7b is designed in such a way that a fastening screw can be inserted through slot 7b into threaded hole 7a of adjustable low-beam module reflector 2a at any position of adjustable low-beam module reflector 2a2 along the entire range of rotation, thus fixing adjustable low-beam module reflector 2a in relation to the respective reflector holder 2b allows.
- the guide section 2b' In the guide section 2b' and in the engagement section 2a' there is a bore 8 which is designed to positively accommodate a fixing pin (not shown in the figures).
- a fixing pin By inserting a fixing pin into the bore 8, the guide section 2b' can be connected to the engagement section 2a', so that the position of the low beam module reflector 2a2—here in a reference position LI—is fixed.
- This position is within an adjustable range of rotation and can favorably represent the middle position of the range of rotation.
- the light-shaping reflection surfaces of the low-beam module reflectors 2a or 2a1 and 2a2 can be of the same design.
- the light source 4 can be an LED light source, for example. It can be arranged in the focal point P or in the focal line of the respective low beam module reflector 2a, 2a1 or 2a2. Provision can be made for the light source to be arranged in such a way that the center point of the circular path B of the range of rotation of the adjustable low beam module reflector 2a2 coincides with the center of gravity of the light emission surface of the light source 4 . Alternatively, provision can be made for the light source 4 to be arranged such that the center point of the circular path B of the range of rotation of the adjustable low beam module reflector 2a2 coincides with an edge delimiting the light emission surface of the light source 4 .
- FIG. 4 shows a schematic sectional illustration of the adjustable low beam module reflector 2a2 according to FIG. 3 in a second position L2.
- the adjustable low-beam module reflector 2a2 was rotated clockwise by the angle a.
- the axis of rotation is oriented horizontally when installed. In this example, the light-dark boundary was therefore lowered by the angle a in the second layer L2.
- a rotation in the opposite direction is also conceivable.
- the elongated hole 7b is designed in such a way that it can be adjusted sufficiently in both directions of rotation and thus a sufficient range of rotation is created.
- FIG. 5 shows a view of the rear of the adjustable low beam module reflector 2a2 according to FIGS. 3 and 4.
- the reflector holder 2b can be seen therein, which can be firmly connected to the light source carrier 3 and the heat sink 5 via screw openings 11 .
- the embodiment shown provides that the motor vehicle headlight 1 has exactly two low-beam modules 2, and the low-beam module reflector 2al of one of the two low-beam modules 2 is fixed immovably and the low-beam module reflector 2a2 of the remaining low-beam module 2 is adjustable via a reflector holder 2b on the heat sink 5 is fixed.
- the number of adjustable low-beam module reflectors 2a2 can also deviate from the embodiment shown. All the low-beam module reflectors 2a could also be adjustable, and at least one of them could be fixed in the reference position LI by means of a fixing pin. In this case, all low-beam modules could be designed in the same way.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Lighting Device Outwards From Vehicle And Optical Signal (AREA)
- Mechanical Engineering (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20193345.4A EP3961088A1 (de) | 2020-08-28 | 2020-08-28 | Kraftfahrzeugscheinwerfer |
| PCT/EP2021/072145 WO2022043039A1 (de) | 2020-08-28 | 2021-08-09 | Kraftfahrzeugscheinwerfer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4204733A1 true EP4204733A1 (de) | 2023-07-05 |
| EP4204733B1 EP4204733B1 (de) | 2025-12-10 |
Family
ID=72290897
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20193345.4A Withdrawn EP3961088A1 (de) | 2020-08-28 | 2020-08-28 | Kraftfahrzeugscheinwerfer |
| EP21755969.9A Active EP4204733B1 (de) | 2020-08-28 | 2021-08-09 | Kraftfahrzeugscheinwerfer |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20193345.4A Withdrawn EP3961088A1 (de) | 2020-08-28 | 2020-08-28 | Kraftfahrzeugscheinwerfer |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US12007087B2 (de) |
| EP (2) | EP3961088A1 (de) |
| JP (1) | JP7515006B2 (de) |
| KR (1) | KR102802444B1 (de) |
| CN (1) | CN115885129A (de) |
| WO (1) | WO2022043039A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102843433B1 (ko) * | 2023-03-27 | 2025-08-06 | 김욱 | 헤드램프 및 이를 포함하는 헤드램프 시스템 |
| DE102023109415A1 (de) * | 2023-04-14 | 2024-10-17 | Vetter Industrie GmbH | Modul |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4707767A (en) * | 1986-03-17 | 1987-11-17 | Gte Products Corporation | Motor vehicle headlight module |
| DE102007040728B4 (de) * | 2007-08-29 | 2019-01-10 | Automotive Lighting Reutlingen Gmbh | Fahrzeugscheinwerfer |
| JP5202940B2 (ja) | 2007-12-28 | 2013-06-05 | スタンレー電気株式会社 | 車両用前照灯 |
| JP5150336B2 (ja) * | 2008-03-28 | 2013-02-20 | スタンレー電気株式会社 | Ledランプ |
| AT513123B1 (de) * | 2012-07-11 | 2023-11-15 | Zkw Group Gmbh | Beleuchtungsvorrichtung für ein Kraftfahrzeug, Scheinwerfer sowie Scheinwerfersystem |
| DE102012106314A1 (de) | 2012-07-13 | 2014-01-16 | Hella Kgaa Hueck & Co. | Modulbaugruppe mit verschwenkbaren Halbleiterlichtmodulen für einenScheinwerfer |
| JP6042741B2 (ja) | 2013-02-14 | 2016-12-14 | スタンレー電気株式会社 | 車両用灯具 |
| US9568160B2 (en) * | 2013-05-10 | 2017-02-14 | Grote Industries, Inc. | Lamp with a reflector |
| JP2016007911A (ja) * | 2014-06-24 | 2016-01-18 | スタンレー電気株式会社 | 車両用前照灯及び組立反射器 |
| JP6651797B2 (ja) * | 2015-11-09 | 2020-02-19 | 市光工業株式会社 | 車両用前照灯 |
| DE102015119524A1 (de) * | 2015-11-12 | 2017-05-18 | Hella Kgaa Hueck & Co. | Lichtmodul mit einer Halbleiterlichtquelle zur justierbaren Aufnahme in einem Scheinwerfer |
| DE102017124094A1 (de) * | 2017-10-17 | 2019-04-18 | Automotive Lighting Reutlingen Gmbh | Justierbare Reflektoranordnung sowie Verfahren zur Justierung einer Reflektoranordnung |
| EP3594059B1 (de) * | 2018-07-10 | 2022-03-09 | ZKW Group GmbH | Modular aufgebautes kraftfahrzeugscheinwerferlichtmodul |
-
2020
- 2020-08-28 EP EP20193345.4A patent/EP3961088A1/de not_active Withdrawn
-
2021
- 2021-08-09 KR KR1020237003190A patent/KR102802444B1/ko active Active
- 2021-08-09 WO PCT/EP2021/072145 patent/WO2022043039A1/de not_active Ceased
- 2021-08-09 CN CN202180052712.6A patent/CN115885129A/zh active Pending
- 2021-08-09 US US18/018,670 patent/US12007087B2/en active Active
- 2021-08-09 JP JP2023507499A patent/JP7515006B2/ja active Active
- 2021-08-09 EP EP21755969.9A patent/EP4204733B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022043039A1 (de) | 2022-03-03 |
| CN115885129A (zh) | 2023-03-31 |
| US20230313959A1 (en) | 2023-10-05 |
| JP2023536890A (ja) | 2023-08-30 |
| EP3961088A1 (de) | 2022-03-02 |
| KR102802444B1 (ko) | 2025-05-02 |
| KR20230031325A (ko) | 2023-03-07 |
| JP7515006B2 (ja) | 2024-07-11 |
| EP4204733B1 (de) | 2025-12-10 |
| US12007087B2 (en) | 2024-06-11 |
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