EP2850362B1 - Kontrollleuchte - Google Patents

Kontrollleuchte Download PDF

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Publication number
EP2850362B1
EP2850362B1 EP12809627.8A EP12809627A EP2850362B1 EP 2850362 B1 EP2850362 B1 EP 2850362B1 EP 12809627 A EP12809627 A EP 12809627A EP 2850362 B1 EP2850362 B1 EP 2850362B1
Authority
EP
European Patent Office
Prior art keywords
light
lens
lens unit
light source
indicator lamp
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.)
Active
Application number
EP12809627.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2850362A1 (de
Inventor
Jindrich HALAMA
Jiri VARAK
Vit Ledl
Radek Melich
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP2850362A1 publication Critical patent/EP2850362A1/de
Application granted granted Critical
Publication of EP2850362B1 publication Critical patent/EP2850362B1/de
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
    • F21V5/00—Refractors for light sources
    • F21V5/008—Combination of two or more successive refractors along an optical axis
    • 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
    • F21V13/00—Producing particular characteristics or distribution of the light emitted by means of a combination of elements specified in two or more of main groups F21V1/00 - F21V11/00
    • F21V13/02—Combinations of only two kinds of elements
    • F21V13/04—Combinations of only two kinds of elements the elements being reflectors and refractors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/023—Light-emitting indicators
    • 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
    • F21W2111/00—Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/036—Light emitting elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/06—Reflector
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H2219/00—Legends
    • H01H2219/054—Optical elements
    • H01H2219/066—Lens

Definitions

  • the invention relates to a control lamp, which is in particular part of an electromechanical command device.
  • Indicator lights are used to visually signal a condition of a device in which the warning lights are installed.
  • the beacons For operator-easily detectable signaling, the beacons must provide uniform and bright illumination from the front to a defined viewing angle, e.g. 60 ° with respect to a longitudinal axis of the indicator.
  • Indicator lights are for this purpose e.g. realized with a diffuser, with which over the (entire) surface of the indicator light a uniform illumination can be achieved.
  • a diffuser disposed between a light source and a transparent, frequently colored cover usually entails a loss of brightness.
  • the absence of the diffuser provides for a higher brightness, but brings a non-uniform illumination of the cover with it.
  • the control lamp comprises a housing and a light source arranged in the housing, which emits light when energized. Furthermore, a lens arrangement with a first lens unit is provided, which is arranged in the direction of propagation of the light emitted by the light source and arranged such that light rays emitted by the light source exit substantially parallel from a side facing away from the light source side of the first lens unit.
  • the side facing away from the light source side of the first lens unit is an exit surface of the first lens unit. In essence, this exit surface extends perpendicular to a longitudinal axis of the indicator light.
  • the exit surface of the first lens unit may have a continuous or a non-continuous profile in cross section. In particular, the exit surface can consist of a multiplicity of non-continuous partial surfaces.
  • the lens arrangement comprises a second lens, which is arranged on the side facing away from the light source side of the first lens unit and arranged such that a part of the emerging from the first lens unit light beams are directed with respect to the parallel propagation direction to a transparent side surface of the housing.
  • the proposed warning light not only allows a uniform brightness over the viewing area with high luminosity, but also a lighting on their side surfaces, so that the visibility of the illumination of the indicator light is given even from a large viewing angle. If the indicator light is used especially in safety-relevant systems, this contributes to a higher level of safety. In addition, the visibility of the illuminated indicator light by a user is perceived as better.
  • the advantages described can be achieved using a conventional light bulb or a light emitting diode (LED).
  • the transparent side surface of the housing through which a part of the light rays is directed, may be formed by a cup-shaped, for example colored, cap.
  • the deflected by the second lens light rays pass through the side walls of the cap.
  • the undeflected light rays pass through the bottom or lid of the cap.
  • the bottom or lid forms a viewing surface of the indicator light, which, as usual, lies substantially in a plane perpendicular to the longitudinal direction of propagation of the light rays.
  • the first lens unit comprises at least one, in particular aspherical, Fresnel lens.
  • a Fresnel lens as a first lens unit allows space-saving manner that light rays emitted by the light source substantially parallel out of the side facing away from the light source side of the Fresnel lens exit. In particular, this makes it possible to arrange the light source at a short distance from the first lens unit.
  • the first lens unit may also be formed by a conventional lens with a convex surface on the side facing away from the light source side. The aspherical shape can reduce the aberrations caused by spherical lenses.
  • the second lens is a prismatic ring whose entrance surface overlaps at least partially with the exit surface of the light beams of the first lens unit.
  • An overlap of the entry surface of the prismatic ring with the exit surface of the first lens unit may be expedient for mechanical reasons. If as many rays of light emerging from the exit surface of the first lens unit are to be deflected to the side by the prismatic ring, then the entrance surface may also completely overlap with the exit surface of the first lens unit.
  • the second lens completely reflects and deflects the light beams entering it.
  • the second lens need not be designed to reflect the light beams entering it.
  • the prismatic ring has the shape of a triangle, in particular an equilateral triangle, so that the light rays entering the entrance surface of the prismatic ring are reflected approximately at a right angle.
  • the entrance surface of the second lens and the exit surface of the first lens unit are parallel to each other.
  • the entrance surface of the second lens and the exit surface of the first lens unit may adjoin one another. This ensures that the deflection of the light rays entering the prismatic ring takes place in the desired manner.
  • a further embodiment of the proposed indicator light provides that an exit surface of the second lens is arranged parallel to a transparent surface portion of a transparent cap and in particular to this borders.
  • the cap can be colored.
  • the purpose of the cap is to provide mechanical protection of the lens assembly. If the cap is colored, a certain signal effect can be caused by the choice of color. As already explained above, the cap can have a cup-shaped shape. At this time, the light beams deflected by the second lens pass through the side walls while the undeflected light beams pass through the bottom.
  • the housing between the light source and the first lens unit comprises a light reflecting body, which reflects light emitted by the light source and / or reflected by the first lens unit.
  • the light reflecting body allows a more uniform and uniform illumination of the warning light when a viewer looks at the warning light at an angle with respect to the longitudinal axis of the warning light.
  • the light reflection body is formed from a light and diffusive material. It is particularly preferred if the light reflection body is formed from a white material.
  • the light reflecting body may consist of a colored plastic. Due to the light color and the resulting reflection properties of the light reflection body assumes the function of a "secondary" light source with respect to an oblique viewing angle.
  • the light reflection body extends from the light source to the first lens unit in a cone shape.
  • the invention further provides an electromechanical control device comprising a pushbutton or switch with a control lamp of the type described above.
  • an electromechanical command device makes it possible to actively give a switching command by actuating it.
  • the command device can be used to switch a machine on or off or to activate or deactivate a specific function.
  • the structure of an electromechanical control device can be realized in many different ways and is of minor importance to the present invention.
  • An exemplary structure of a command device for example, the above-mentioned document US 4,758,701 be removed.
  • Fig. 1 shows a cross-sectional view of a control lamp 100 according to the invention.
  • the indicator 100 includes a cylindrical housing 1, in which a light source 2 is arranged.
  • the light source 2 may be, for example, a light bulb or a light emitting diode.
  • a longitudinal axis of the cylindrical housing 1 is identified by the reference numeral 3.
  • the light source 2 lies on the longitudinal axis 3. Light emitted by the light source 2 extends in a direction of an essentially longitudinal propagation in the direction of an outer end 4 of the housing 1.
  • a lens assembly 5 is mounted at the outer end 4 of the housing 1.
  • a cap 13 is arranged on the side facing away from the light source 2 side of the lens assembly 5.
  • the cap 13 has a pot-shaped shape and surrounds the lens assembly 5.
  • the cap 13 is with its lateral flanks or its side surface 12 with the outer end 4 of the housing 1, optionally releasably latched.
  • About the locking the lens assembly 5 may be fixed in the indicator 100.
  • the cap 13 is made of a transparent and optionally colored material.
  • the lens assembly 5 comprises a first lens unit 6 and a second lens 7.
  • the lens unit 6 may be formed by a single lens or a plurality of lenses.
  • An entrance surface of the light beams of the lens unit 6 is designated by the reference numeral 8.
  • the light beams exit via a light exit surface 9 on the side of the lens unit 6 facing away from the light source 2.
  • the lens unit 6 is such that light beams emitted by the light source 2 exit the exit surface 9 substantially parallel. This is done a projection of the point of light emanating from the light source 2 light rays into the infinite.
  • the light beams 18 emitted from the point light source extend in the direction of the lens unit 6 and enter the lens unit 6 through the entrance surface 8.
  • the light beams 18 are deflected at the entrance surface (ie, a first optical surface).
  • a further deflection of the light beams 18 takes place after passing through the interior of the lens 6 at a light exit surface 9 (second optical surface).
  • the shape of the lens unit 6 (which may be a single lens or a plurality of lenses) deflects the light rays 18 into the infinite in the desired manner. This means that the light rays 18 emerging from the light exit surface 9 extend approximately parallel. This results in a plane perpendicular to the longitudinal axis 3, a uniform illumination.
  • the lens unit 6 is formed by a single Fresnel lens.
  • the use of a Fresnel lens makes it possible in particular to make the distance between the light source 2 and the lens unit 6 very small.
  • Another advantage of the Fresnel lens is that in contrast to the in Fig. 3 illustrated lens unit 6 is very flat, which can be 100 compact control lights realized.
  • a Fresnel lens is preferably used as the lens unit 6.
  • the uniform illumination is supported by a arranged between the light source 2 and the lens unit 6 light reflection body 15, which has the shape of a cone in cross section. How out Fig. 1 it can be seen, the cone widens from the light source 2 to the lens unit 6.
  • the light reflection body 15 reflects light emitted by the light source 2 and / or reflected by the lens unit 6.
  • the light reflecting body 15 is made of a light and diffusive material. Particularly good reflection properties arise when the light reflection body is white.
  • the light reflecting body 15 is made of a white plastic.
  • the light reflection body 15 represents, in particular from oblique viewing angles, a "secondary" light source.
  • an oblique viewing angle is understood as a viewing of the indicator light 100, which takes place from outside the longitudinal axis 3. It has been found that the uniform illumination effect of the viewing surface 14 is maintained up to a viewing angle 17 of 60 ° with respect to the longitudinal axis 3 or a parallel thereto.
  • the light reflecting body 15 could also be formed parabolic-shaped. For manufacturing reasons, however, the shape of a cone is to be preferred.
  • the second lens 7 of the lens arrangement 5 part of the light beams emerging from the first lens unit 6 can be directed with respect to the longitudinal propagation direction, ie the longitudinal axis, to the transparent side surface 12 of the cover cap 13.
  • the second lens 7 is formed as a prismatic ring, while entrance surface 10 at least partially overlaps with the exit surface 9 of the light beams of the lens unit 6.
  • Fig. 1 shown.
  • the prismatic ring is partially on an end face of the outer edge 4 of the housing 1.
  • the prismatic ring 7 could also be arranged on the lens unit 6 such that the entrance surface 10 of the lens 7 completely overlaps with the exit surface 9 of the lens unit 6.
  • the prismatic ring 7 in cross-section on the shape of an approximately isosceles triangle.
  • the lens 7 completely reflects the light beams entering it and deflects them in the direction of the side surfaces 12 of the cap 13.
  • a light emission in the region of the viewing surface 14 is prevented in the region of the prismatic lens 7. This results in a dark ring, which enhances the perception of the side emerging from the cap 13 light.
  • the illumination of the control lamp 100 can be perceived not only from the direction of the longitudinal axis and within the above-described viewing angle, but also from a complete lateral view of the indicator lamp 100.
  • Fig. 2 shows in an enlarged view the lighting concept of the indicator 100 in the region of the cap 13.
  • results in the area of the viewing surface 14 is a clearly demarcated, circular illuminated area.
  • the transition from an illuminated area 19 of the viewing area 14 to an unilluminated area, which is perceivable as a dark ring 16, is identified by the reference numeral 20.
  • the dark ring 16, the circular illuminated viewing area 14, is caused by the presence of the prismatic lens 7.
  • the flanks or side surfaces 12 of the cap 13 are in contrast illuminated again due to the presence of the prismatic ring 7. This is indicated by the reference numeral 19.
  • Fig. 3 In addition, the already mentioned viewing angle 17 with respect to a parallel 3 'to the longitudinal axis 3 is shown. If the parallel 3 'passes through the boundary 20, the viewing angle 17 marks the transition between the illuminated area 19 and the non-illuminated area 16 to the outside.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Illuminated Signs And Luminous Advertising (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)
EP12809627.8A 2012-11-20 2012-11-20 Kontrollleuchte Active EP2850362B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/073111 WO2014079481A1 (de) 2012-11-20 2012-11-20 Kontrollleuchte

Publications (2)

Publication Number Publication Date
EP2850362A1 EP2850362A1 (de) 2015-03-25
EP2850362B1 true EP2850362B1 (de) 2018-03-21

Family

ID=47501082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12809627.8A Active EP2850362B1 (de) 2012-11-20 2012-11-20 Kontrollleuchte

Country Status (4)

Country Link
US (1) US9336966B2 (zh)
EP (1) EP2850362B1 (zh)
CN (1) CN104641169B (zh)
WO (1) WO2014079481A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9816680B2 (en) 2014-06-05 2017-11-14 Pentair Thermal Management Llc Lighted cable termination device having expanded viewing area
USD843625S1 (en) 2014-06-05 2019-03-19 Nvent Services Gmbh Lighted cable termination assembly
JP6382906B2 (ja) * 2016-10-17 2018-08-29 ファナック株式会社 ロボット及びロボットにおける表示灯の設置方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3228288A (en) 1961-10-20 1966-01-11 Square D Co Interlocking cap and lens for indicator lights
US3364350A (en) * 1966-10-25 1968-01-16 Square D Co Pilot light lens mounting structure
US4758701A (en) 1984-03-14 1988-07-19 Allen-Bradley Company Indicator light assembly for control panel
US4583151A (en) 1984-10-22 1986-04-15 Allen-Bradley Company Illuminated display
US6981784B2 (en) * 2002-05-30 2006-01-03 Gelcore, Llc Side projecting LED signal
WO2006099732A1 (en) * 2005-03-23 2006-09-28 Tir Systems Ltd. Apparatus and method for collecting and detecting light emitted by a lighting apparatus
RU2008146063A (ru) 2006-05-22 2010-05-27 Конинклейке Филипс Электроникс Н.В. (Nl) Осветительная система, содержащая цветовой индикатор
JP4647029B2 (ja) * 2006-08-10 2011-03-09 アップストリーム エンジニアリング オーワイ 照射方法および照射デバイス
EP2112424B1 (de) * 2008-04-25 2014-06-25 emz-Hanauer GmbH & Co. KGaA Lichtabgabeeinrichtung für ein Haushaltsgerät
DE102009041612B4 (de) * 2009-09-17 2016-06-30 R. Stahl Schaltgeräte GmbH Explosionsgeschütztes Gehäuse mit Signalisierungseinrichtung und Lichtleiteinrichtung für ein solches Gehäuse
CN201885080U (zh) * 2010-11-19 2011-06-29 金泽会 反射式彩虹发生装置

Also Published As

Publication number Publication date
EP2850362A1 (de) 2015-03-25
US9336966B2 (en) 2016-05-10
US20150255230A1 (en) 2015-09-10
CN104641169A (zh) 2015-05-20
WO2014079481A1 (de) 2014-05-30
CN104641169B (zh) 2018-01-26

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