EP2428727A1 - Réflecteur à lampes et son dispositif de fabrication - Google Patents

Réflecteur à lampes et son dispositif de fabrication Download PDF

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Publication number
EP2428727A1
EP2428727A1 EP11170398A EP11170398A EP2428727A1 EP 2428727 A1 EP2428727 A1 EP 2428727A1 EP 11170398 A EP11170398 A EP 11170398A EP 11170398 A EP11170398 A EP 11170398A EP 2428727 A1 EP2428727 A1 EP 2428727A1
Authority
EP
European Patent Office
Prior art keywords
curvature
facet
radii
reflector
facets
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
EP11170398A
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German (de)
English (en)
Other versions
EP2428727B1 (fr
Inventor
Kai Elfmann
Ioannis Laftsidis
Andreas Möcking
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.)
Jordan Reflektoren GmbH and Co KG
Original Assignee
Jordan Reflektoren GmbH and Co KG
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 Jordan Reflektoren GmbH and Co KG filed Critical Jordan Reflektoren GmbH and Co KG
Priority to EP20110170398 priority Critical patent/EP2428727B1/fr
Publication of EP2428727A1 publication Critical patent/EP2428727A1/fr
Application granted granted Critical
Publication of EP2428727B1 publication Critical patent/EP2428727B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design
    • F21V7/048—Optical design with facets structure

Definitions

  • the present invention initially relates, according to the preamble of claim 1, to a luminaire reflector consisting of a hollow, cup-shaped, in particular rotationally symmetrical, paraboloidal reflector body having an inner reflection surface and having a rear, smaller illuminant opening and a front in the direction of its longitudinal center axis , the larger light exit opening increasing inner diameter, wherein the reflection surface is divided into a plurality of structured facets, each having a curved in at least one surface direction with a radius of curvature facet surface, and wherein the facets in a grid-like structure on the one hand in the circumferential direction in concentric ring groups and on the other hand in radially symmetrical arranged between the lamp opening and the light exit opening arranged column groups.
  • the invention according to the preamble of claim 8 also relates to a device for producing such a luminaire reflector, consisting of a molded press body with an inside of the produced reflector body adapted negative contour with corresponding facet negative surfaces, the facet negative surfaces in a grid-like structure on the one hand are arranged in the circumferential direction in concentric ring groups and on the other hand in radially symmetric column groups.
  • a luminaire with a reflector element of the generic type is in the EP 1 632 713 B1 described. Due to the two-dimensional, in particular spherically curved surfaces of the individual facets - there called “segments" - a scattering (fanning) to equalize the light emitted by a lamp for a more homogeneous illumination is to be achieved. Specifically, it is intended that the radii of curvature of the segments between an inner vertex area of the reflector element and the outer light exit opening should also increase with increasing distance from the vertex area.
  • the known reflector element should preferably consist of pressed aluminum, wherein an aluminum disk, that is a circular disk, is moved along a rotating pin (press molded body), so that the pin (male) is imaged in the aluminum blank.
  • this production by forming in the spinning process has the disadvantage of very large manufacturing tolerances.
  • large deviations between the actual desired curvature radii on the one hand and curvature radii on the finished pressed reflector body on the other hand are inevitably inevitable and therefore predetermined for the facet negative surfaces of the press molded body with reversed (negative) curvature. Therefore, it is at least questionable whether the radii increasing from the inside out according to EP 1 632 713 B1 in practice even feasible, ie reproducible produced in the pressing process.
  • the document EP 1 890 079 A1 describes a reflector, in particular for gas discharge lamps.
  • this known reflector is formed as a faceted reflector with a plurality of facets, which are arranged in radial and circular columns or rows and formed as cylindrical facets and / or spherical facets.
  • the facets should be curved with radii which assume values of between 9.1 mm and 150 mm, wherein facets with the same radii in each case should be arranged in a spiral such that the facets within each column or row are periodically and in accordance with a sine curve. and lose weight.
  • the luminaire reflector according to the invention is characterized in that the facet surfaces at least within a partial area of at least 50% of the reflection surface - based on the radial and axial extent between the bulb opening and the light exit opening - in terms of size of each at least one of its radii of curvature designed are that in each column group successive facets regularly have alternately rising and falling or falling and rising again radii of curvature. This means that the radii of curvature from inside to outside between individual directly adjacent facets become alternately larger and smaller or smaller and larger, depending on whether starting with a smaller or a larger radius. This results in each radii differences, which - analogous to a mathematical "alternating series" - alternately changing signs (+/-) have.
  • the device according to the invention that-at least within a corresponding subregion of at least 50% of the outer surface-two adjacent facets directly adjacent in each column group and different facets for their radii of curvature.
  • Negative surfaces are designed such that the respective smaller radius of curvature is at least 25% smaller than the respective larger radius of curvature, d. H. the smaller radius corresponds to a maximum of 75% of the larger radius. If, for example, the larger radius should be 10 mm, the smaller radius with a maximum of 7.5 mm would be predefined. With this minimum difference of 25% can in the case of the device according to the invention, d. H. on the molded article according to the invention depressed reflector of the alternately increasing and decreasing radii profile can be reproducibly ensured.
  • An inventive luminaire reflector 1 consists of a hollow, cup-shaped arched reflector body 2 with an inner reflection surface 4.
  • the reflector body 2 has a seen in the direction of a longitudinal central axis 6 of a rear, smaller bulb opening 8 in the radial and axial direction up to a front, larger light exit opening 10 increasing, each measured perpendicular to the longitudinal central axis 6 inner diameter.
  • the reflector body 2 is rotationally symmetrical parabolic.
  • an illuminant not shown, can be arranged such that the light emitted by it is radiated outwardly at least partially from the light exit opening 10 by reflection via the reflection surface 4.
  • a flat LED element can advantageously also be arranged in the plane of the illuminant opening 8 or parallel thereto.
  • At least a major part of the reflection surface 4 is subdivided into a plurality of structured facets 12, which in Fig. 2 are shown only partially for simplicity.
  • Each facet 12 has an at least in a surface direction curved facet surface 14.
  • Fig. 3 This will be on Fig. 3 reference is made, according to which the facet surface 14 is curved or curved in only one surface direction illustrated by a dash-dotted line of curvature X with a radius of curvature R1.
  • the curvature line X runs with the same curvature R1 over the facet surface 14.
  • This only single curved facet 12 can also be referred to as a cylindrical facet because it corresponds to the shape of a section of a cylindrical surface.
  • Fig. 4 is the facet surface 14 - in addition to the curvature in the surface direction X - curved in a second, illustrated by a dashed line of curvature Y surface direction, namely with a radius of curvature R2.
  • the radii R1 and R2 may be the same or different.
  • the curvature lines X, Y expediently extend perpendicularly to one another in each case in the center over the facet surface 14.
  • the facet surface 14 can also be curved as a cylindrical facet only in the surface direction Y.
  • the facets 12 are in a grid-like, in particular spider-web-like grid structure - see in particular the axial view in Fig. 1 -
  • Each column group B extends according to Fig. 1 at least partially between the inner bulb opening 8 and the outer light exit opening 10 and in the circumferential direction over an angle ⁇ , which is divided by the circumference of 360 ° divided by the number of column groups B.
  • each facet 12 is approximately trapezoidal in plan view (see Fig. 1 ).
  • first curvature line X preferably extends with the first curvature radius R1 of each facet surface 14 in a radial or diametrical plane defined by the longitudinal center axis 6.
  • the second curvature line Y of each facet surface 14 extends with the second radius of curvature R2 in the circumferential direction of the reflector body 2 and thus in a plane perpendicular to the longitudinal central axis 6.
  • the two radii of curvature R1, R2 of each facet surface 14 can be of different sizes.
  • the facet surfaces 14 are each spherically curved, wherein the two radii of curvature R1, R2 are the same size.
  • the facet surfaces 14 at least each have one of their radii of curvature R1 and / or R2 in terms of size are designed so that in the axial and radial direction between the bulb opening 8 and the light exit opening 10, ie within each column group B, the radii of curvature R1 and / or R2 between the individual, each directly adjacent facets 12 regularly have different sizes alternately.
  • the radius difference can optionally relate to R1 and / or R2.
  • the facet surfaces 14 of the reflector body 2 are convexly curved toward the interior in the direction of the longitudinal central axis 6.
  • the reflector 1 or the reflector body 2 is produced in one piece in a forming-pressing process from a first flat sheet metal blank by the sheet metal blank to form the structured reflection surface 4 with rotation about the longitudinal central axis 6 to an exemplary in Fig. 5 shown negative-pressure mold or male, ie a pressure-molded body 16 is pressed.
  • the pressure-molded body 16 has a negative contour corresponding to the interior of the reflector body 2, wherein corresponding, preferably concavely curved, facet negative surfaces 18 are structured on its outer surface.
  • the facet negative surfaces 18 of the pusher body 16 are also arranged in a crenellated structure in the circumferential direction in concentric ring groups A 'and in the axial and radial direction in radially symmetric column groups B'.
  • the facet negative surfaces 18 of the molded article 16 are at least in a partial region of at least 50% of the surface extent in the radial and axial directions with respect to the size of at least one of their radii of curvature R1 'R2' designed such that the radii of curvature within each column group B 'regularly have alternately different sizes.
  • two radially adjacent and with respect to their radii of curvature different facet negative surfaces 18 are designed such that the respective smaller radius of curvature smaller by at least 25% each larger radius of curvature, so that the respective smaller radius is a maximum of 75% of the larger radius.
  • the facet negative surfaces 18 are formed within each ring group A 'with the same radii of curvature.
  • the radii within each circular ring group A ' can deviate from one another within the scope of the manufacturing tolerance.
  • two ring groups with facets 12a be arranged with flat, flat facet surfaces.
  • ring groups A with radii R1.1 and R1.2 changing from group A to group A.
  • the radius R1.1 can be larger and the radius R1.2 smaller.
  • the larger radius R1.1 is 27 mm and the smaller radius R1.2 is 19 mm.
  • an embodiment may be provided, wherein the smaller radii are 10 mm and the larger radii 17 mm.
  • step c) a so-called “best-fit approximation" of a circular arc line to the measured free-form curve is automatically carried out with the mentioned device-based on an implemented software.
  • the "best fit circular arc” is approximated to the determined curve shape so that deviations on average for all curve areas are minimized.
  • the radius of curvature of the so-called “best-fit arc” is set as the facet radius of curvature (eg, R1).
  • the invention is not limited to the illustrated and described embodiments, but also includes all the same in the context of the invention embodiments.
  • the column groups B and B ' have a radial orientation in one view, ie the facets 12 of the reflector body 2 lying in each case in a common column group and thus correspondingly also the negative surfaces 18 of the press molded body 16 lie with their centers on each a in the axial view radially extending straight line (see Fig. 1 and 5 ).
  • the term "grid-like facet structure" includes, for example, also embodiments such as in 6 and 7 illustrated, wherein the individual ring groups A and A 'from group to group by one in each Fig.
  • ⁇ 1 to ⁇ 12 drawn circumferential offset against each other are rotated about the axis 6, so that the column groups B and B 'in the axial view - see 6 and 7 - Slightly inclined from the inside to the outside relative to the respective radial straight line and / or -. B. slightly spiral-like - curved.
  • the respective circumferential offset ⁇ 1 to ⁇ 12 may, for. B. in the range of 0 ° to ⁇ 4 °, ie from group to group optionally by 0 ° to 4 ° in one of the two opposite circumferential directions.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Elements Other Than Lenses (AREA)
EP20110170398 2010-08-25 2011-06-17 Réflecteur à lampes et son dispositif de fabrication Active EP2428727B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20110170398 EP2428727B1 (fr) 2010-08-25 2011-06-17 Réflecteur à lampes et son dispositif de fabrication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP10173980 2010-08-25
EP20110170398 EP2428727B1 (fr) 2010-08-25 2011-06-17 Réflecteur à lampes et son dispositif de fabrication

Publications (2)

Publication Number Publication Date
EP2428727A1 true EP2428727A1 (fr) 2012-03-14
EP2428727B1 EP2428727B1 (fr) 2013-11-13

Family

ID=43332856

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EP20110170398 Active EP2428727B1 (fr) 2010-08-25 2011-06-17 Réflecteur à lampes et son dispositif de fabrication

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EP (1) EP2428727B1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011085418A1 (de) * 2011-10-28 2013-05-02 Trilux Gmbh & Co. Kg Reflektor für Halbleiterlichtquellen
EP2796778A1 (fr) * 2013-04-26 2014-10-29 Hella KGaA Hueck & Co. Système d'éclairage
WO2015087116A1 (fr) * 2013-12-13 2015-06-18 Dmy Mühendi̇sli̇k Elektri̇k Maki̇ne İnşaat Ve Bi̇li̇şi̇m San. Ti̇c. Ltd. Şti̇. Réflecteur pour éclairage

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1993021473A1 (fr) * 1992-04-15 1993-10-28 Optical & Textile Limited Appareil d'eclairage
DE69130738T2 (de) * 1991-04-03 1999-09-02 Flowil Int Lighting Reflektor mit lampe
EP1643186A1 (fr) * 1999-03-09 2006-04-05 Schott AG Conception de l' optique d' un réflecteur pour refléchir des rayons lumineux
EP1890079A1 (fr) 2006-08-15 2008-02-20 Schott AG Réflecteur pour lampes à décharge
DE102007016748A1 (de) * 2007-04-07 2008-10-09 Tetsuhiro Kano Reflektor für eine Leuchte
EP2019254A2 (fr) * 2007-07-26 2009-01-28 ERCO GmbH Lampe pour éclairer des surfaces d'un bâtiment
EP1632713B1 (fr) 2004-09-02 2009-07-15 ERCO GmbH Projecteur pour illuminer des surfaces d'un édifice
EP2204607A2 (fr) * 2008-12-09 2010-07-07 Phoenix Electric Co., Ltd. Réflecteur pour une utilisation dans un dispositif luminescent et dispositif luminescent l'utilisant

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69130738T2 (de) * 1991-04-03 1999-09-02 Flowil Int Lighting Reflektor mit lampe
WO1993021473A1 (fr) * 1992-04-15 1993-10-28 Optical & Textile Limited Appareil d'eclairage
EP1643186A1 (fr) * 1999-03-09 2006-04-05 Schott AG Conception de l' optique d' un réflecteur pour refléchir des rayons lumineux
EP1632713B1 (fr) 2004-09-02 2009-07-15 ERCO GmbH Projecteur pour illuminer des surfaces d'un édifice
EP1890079A1 (fr) 2006-08-15 2008-02-20 Schott AG Réflecteur pour lampes à décharge
DE102007016748A1 (de) * 2007-04-07 2008-10-09 Tetsuhiro Kano Reflektor für eine Leuchte
EP2019254A2 (fr) * 2007-07-26 2009-01-28 ERCO GmbH Lampe pour éclairer des surfaces d'un bâtiment
EP2204607A2 (fr) * 2008-12-09 2010-07-07 Phoenix Electric Co., Ltd. Réflecteur pour une utilisation dans un dispositif luminescent et dispositif luminescent l'utilisant

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011085418A1 (de) * 2011-10-28 2013-05-02 Trilux Gmbh & Co. Kg Reflektor für Halbleiterlichtquellen
EP2796778A1 (fr) * 2013-04-26 2014-10-29 Hella KGaA Hueck & Co. Système d'éclairage
WO2014173656A1 (fr) * 2013-04-26 2014-10-30 Hella Kgaa Hueck & Co. Système d'éclairage
WO2015087116A1 (fr) * 2013-12-13 2015-06-18 Dmy Mühendi̇sli̇k Elektri̇k Maki̇ne İnşaat Ve Bi̇li̇şi̇m San. Ti̇c. Ltd. Şti̇. Réflecteur pour éclairage

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