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EP2593711B1 - Torch with a rotationally symmetrical optical attachment - Google Patents

Torch with a rotationally symmetrical optical attachment Download PDF

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Publication number
EP2593711B1
EP2593711B1 EP11809298.0A EP11809298A EP2593711B1 EP 2593711 B1 EP2593711 B1 EP 2593711B1 EP 11809298 A EP11809298 A EP 11809298A EP 2593711 B1 EP2593711 B1 EP 2593711B1
Authority
EP
European Patent Office
Prior art keywords
led
optical attachment
torch according
lens part
converging lens
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
EP11809298.0A
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German (de)
French (fr)
Other versions
EP2593711A2 (en
Inventor
Rainer Opolka
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.)
Ledlenser GmbH and Co KG
Original Assignee
Ledlenser GmbH and Co KG
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Publication of EP2593711A2 publication Critical patent/EP2593711A2/en
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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
    • F21V5/006—Refractors for light sources applied to portable lighting devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells
    • F21L4/02—Electric lighting devices with self-contained electric batteries or cells characterised by the provision of two or more light sources
    • F21L4/022—Pocket lamps
    • F21L4/027—Pocket lamps the light sources being a LED
    • 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
    • F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
    • F21V14/04—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors
    • F21V14/045—Controlling the distribution of the light emitted by adjustment of elements by movement of reflectors in portable lighting devices
    • 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
    • F21V5/04—Refractors for light sources of lens shape
    • 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
    • F21V7/0091—Reflectors for light sources using total internal reflection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a flashlight with an optical attachment that is rotationally symmetrical with respect to an optical axis, which has an outer reflector part, an inner collecting lens part and a rear surface with a blind hole, and a light-emitting diode (LED) arranged on a disk-shaped holder, the diameter of the reflector part 20 , 8 ⁇ 1 mm, the diameter of the collecting lens part is 11.4 ⁇ 1 mm and the height of the front lens (11.6 ⁇ 1) mm.
  • LED light-emitting diode
  • Flashlights of the type mentioned at the outset with the described optical lenses are known in principle from the prior art.
  • a light source being displaceable within the rear blind hole to change the radiation characteristic.
  • the light source is axially movable between two points, both of which are arranged within the blind hole.
  • a linear movement of the light source essentially changes the opening angle of a light cone, so that objects can be illuminated at different distances.
  • a disadvantage of the known flashlights with the described front optics is that the light intensity within the light cone is not uniform, the intensity on the optical axis generally being greatest while it is steadily decreasing towards the edge of the light cone.
  • a flashlight is to be created in which the radiation characteristic between a so-called moon position and a focus position can be adjusted.
  • a cone of light with a large opening angle and homogeneous light distribution is generated when the moon is positioned.
  • the focus position is characterized by a light cone with a comparatively small opening angle.
  • the usability of the flashlight should be as simple as possible, so that the desired setting can be found quickly and reliably.
  • the attachment optics being displaceable in relation to the LED so limited by two stops that an essentially homogeneous light cone is generated when the attachment optics are in contact with the holder, the thickness of the collecting lens part 3, 04 ⁇ 0.5 mm and in a focused setting the distance between the LED and the contact surface is 3.58 ⁇ 0.5 mm and the distance between the LED and a center plane is 8.88 ⁇ 1 mm.
  • the linear movement of the attachment optics along the optical axis is limited by a further stop, which forms the greatest possible distance between the LED and the attachment optics, the LED being in the focal point of the attachment optics in this position.
  • this stop is formed by a stop surface on the flashlight housing and the lamp head or within a connecting element.
  • the moon position in which the light is emitted homogeneously within a defined light cone, is optimally set when the holder is in contact with the stop surface of the front lens system and the LED therefore almost coincides with the stop surface plane.
  • the holder has thermally conductive surfaces which are in contact with the housing.
  • an annular contact surface can be provided for this purpose on the underside of the holder, with which it rests on a base-shaped projection inside the housing.
  • Aluminum, copper or brass are particularly suitable as preferred materials for the thermally conductive surfaces.
  • the particular radiation characteristic of the flashlight according to the invention is essentially determined by the geometric configuration of the front lens system, the length or size relationships being of particular importance for this.
  • the ratio between the diameter of the collecting lens part and the diameter of the reflector part is 0.55 ⁇ 0.1, preferably 0.55 ⁇ 0.05.
  • the ratio between the diameter of the converging lens part and the diameter of the reflector part is 0.55, with deviations of the order of 0.1, preferably of 0.5, being tolerable both in the positive and in the negative direction.
  • the ratio between the thickness of the collecting lens part and the height of the reflector part is 0.26 ⁇ 0.05, preferably 0.26 ⁇ 0.02.
  • the ratio between the distance of the LED to the contact surface to the distance of the LED to a center plane is 0.4 ⁇ 0.1, preferably 0.40 ⁇ 0.05.
  • the blind hole has a conical surface which has an opening angle of 23 ° ⁇ 5 °, preferably 23 ° ⁇ 2 °, with respect to the longitudinal axis.
  • various concrete dimensions of the geometric parts are provided, preferably the diameter of the reflector part 20.8 ⁇ 1 mm, the diameter of the collecting lens part 11.4 ⁇ 1 mm, the height of the front lens 11.6 ⁇ 1 mm Thickness of the collecting lens part 3.04 ⁇ 0.5 mm or, in the focused setting, the distance between the LED and the contact surface is 3.58 ⁇ 0.5 mm and the distance between the LED and a center plane is 8.88 ⁇ 1 mm.
  • the collecting lens part is preferably delimited by two differently convexly curved surfaces, the radius of the light entry surface being larger than the radius of the light exit surface.
  • a flashlight 1 has a housing 2, a lamp head 3, an attachment lens 4 and an LED 5.
  • the attachment lens 4 is fastened in the lamp head 3, which can be displaced longitudinally axially relative to the housing 2.
  • LED 5 is on one Bracket 6 attached, so that the overall optics can be moved relative to the LED.
  • the displacement of the lamp head 3 or the front lens 4 is limited by two stops.
  • the holder 6 forms a system with the front lens system 4, for which purpose the front lens system 4 has a rear surface designed as a stop surface 7.
  • the displacement is possible by means of a connecting element 8 which connects the lamp head 3 and the housing 2 to one another and which has a stop (not shown).
  • Fig. 1a shows a setting in which the front lens system 4 is in contact with the holder 6, so that the LED 5 almost coincides with the plane of the stop surface.
  • the radiation is characterized by a large radiation angle within which the light distribution is homogeneous.
  • Fig. 1b shows, in contrast, a focused setting, where the front lens 4 and the holder are arranged at a distance A from each other.
  • the front lens 4 has an inner collecting lens part 21, an outer reflector part 22 and a rear surface 23, which has a blind hole 24.
  • the blind hole 24 is delimited by a conical surface 25 which has an opening angle ⁇ of 23 ° with respect to the longitudinal axis 26.
  • the diameter 27 of the reflector part 22 is 20.8 mm, while the converging lens part 21 has a diameter 28 of 11.4 mm.
  • the front lens 4 shown is a total of 11.6 mm high (height 29) and the collecting lens part has a thickness 30 of 3.04 mm.
  • the distance 31 between the LED 5 and the stop surface 23 is 3.58 mm and the distance 32 between the LED 5 and a center plane 33 is 8.88 mm.
  • Fig. 3 shows schematically the beam path in a focused setting, the light rays emitted by the LED 5 striking the converging lens part 21, which are emitted at an angle ⁇ of ⁇ 32 °. These light beams are bundled by the converging lens part 21 to form a light cone 311 with a cone angle ⁇ of 4 °. The remaining light beams are emitted by the LED 5 at an angle ⁇ of 32 ° to 60 ° and hit the reflector part 22, which generates an axially parallel beam 321.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lenses (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Stroboscope Apparatuses (AREA)
  • Led Device Packages (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)

Description

Die vorliegende Erfindung betrifft eine Taschenlampe mit einer zu einer optischen Achse rotationssymmetrischen Vorsatzoptik, die einen äußeren Reflektorteil, einen inneren Sammellinsenteil sowie eine rückwärtige Fläche mit einer Sacklochbohrung besitzt, und einer auf einem scheibenförmigen Halter angeordneten Leuchtdiode (LED), wobei der Durchmesser des Reflektorteils 20,8 ± 1 mm, der Durchmesser des Sammellinsenteils 11,4 ± 1 mm und die Höhe der Vorsatzoptik (11,6 ± 1) mm beträgt.The present invention relates to a flashlight with an optical attachment that is rotationally symmetrical with respect to an optical axis, which has an outer reflector part, an inner collecting lens part and a rear surface with a blind hole, and a light-emitting diode (LED) arranged on a disk-shaped holder, the diameter of the reflector part 20 , 8 ± 1 mm, the diameter of the collecting lens part is 11.4 ± 1 mm and the height of the front lens (11.6 ± 1) mm.

Taschenlampen der eingangs genannten Art mit den beschriebenen Vorsatzoptiken sind grundsätzlich nach dem Stand der Technik bekannt. Beispielsweise werden in der US 2,254,962 verschiedene Vorsatzoptiken beschrieben, wobei zur Veränderung der Abstrahlcharakteristik eine Lichtquelle innerhalb der rückwärtigen Sacklochbohrung verschiebbar ist. Dabei ist die Lichtquelle zwischen zwei Punkten längsaxial beweglich, die beide innerhalb der Sacklochbohrung angeordnet sind. Durch eine Linearbewegung der Lichtquelle wird im wesentlichen der Öffnungswinkel eines Lichtkegels geändert, so dass Objekte in unterschiedlichen Entfernungen beleuchtet werden können.Flashlights of the type mentioned at the outset with the described optical lenses are known in principle from the prior art. For example, in the US 2,254,962 Various attachment optics are described, a light source being displaceable within the rear blind hole to change the radiation characteristic. The light source is axially movable between two points, both of which are arranged within the blind hole. A linear movement of the light source essentially changes the opening angle of a light cone, so that objects can be illuminated at different distances.

Ähnliche Vorsatzoptiken werden in US 2009/0109687A1 , US 2007/0263390A1 , US 2010/0002422 und DE 20 2006 020378 U1 offenbart.Similar optics are shown in US 2009 / 0109687A1 . US 2007 / 0263390A1 . US 2010/0002422 and DE 20 2006 020378 U1 disclosed.

Nachteilig an den bekannten Taschenlampen mit den beschriebenen Vorsatzoptiken ist, dass die Lichtintensität innerhalb des Lichtkegels nicht gleichmäßig ist, wobei in der Regel die Intensität auf der optischen Achse am größten ist, während sie zum Rand des Lichtkegels hin stetig abnimmt.A disadvantage of the known flashlights with the described front optics is that the light intensity within the light cone is not uniform, the intensity on the optical axis generally being greatest while it is steadily decreasing towards the edge of the light cone.

Es ist daher die Aufgabe der vorliegenden Erfindung eine Taschenlampe mit einer Vorsatzoptik zu schaffen, bei der die oben beschriebenen Nachteile behoben werden. Insbesondere soll eine Taschenlampe geschaffen werden, bei der die Abstrahlcharakteristik zwischen einer sogenannten Mondstellung und einer Fokusstellung eingestellt werden kann. Bei der Mondstellung wird ein Lichtkegel mit einem großen Öffnungswinkel und darin homogener Lichtverteilung erzeugt. Demgegenüber ist die Fokusstellung durch einen Lichtkegel mit einem vergleichsweise kleinen Öffnungswinkel gekennzeichnet. Dabei soll die Bedienbarkeit der Taschenlampe möglichst einfach sein, womit die gewünschte Einstellung schnell und zuverlässig gefunden werden kann.It is therefore the object of the present invention to provide a flashlight with an optical attachment in which the disadvantages described above are eliminated. In particular, a flashlight is to be created in which the radiation characteristic between a so-called moon position and a focus position can be adjusted. A cone of light with a large opening angle and homogeneous light distribution is generated when the moon is positioned. In contrast, the focus position is characterized by a light cone with a comparatively small opening angle. The usability of the flashlight should be as simple as possible, so that the desired setting can be found quickly and reliably.

Diese Aufgabe wird durch die Taschenlampe nach Anspruch 1 gelöst, wonach erfindungsgemäß die Vorsatzoptik gegenüber der LED derart durch zwei Anschläge begrenzt verschiebbar ist, dass bei einer Anlage der Vorsatzoptik an dem Halter ein im wesentlichen homogener Lichtkegel erzeugt wird, wobei die Stärke des Sammellinsenteils 3,04 ± 0,5 mm und in fokussierter Einstellung der Abstand zwischen LED und Anlagefläche 3,58 ± 0,5 mm und der Abstand zwischen LED und einer Mittelpunktsebene 8,88 ± 1 mm beträgt.This object is achieved by the flashlight according to claim 1, according to the invention the attachment optics being displaceable in relation to the LED so limited by two stops that an essentially homogeneous light cone is generated when the attachment optics are in contact with the holder, the thickness of the collecting lens part 3, 04 ± 0.5 mm and in a focused setting the distance between the LED and the contact surface is 3.58 ± 0.5 mm and the distance between the LED and a center plane is 8.88 ± 1 mm.

Die Abstrahlcharakteristik der erfindungsgemäßen Taschenlampe ist im wesentlichen durch zwei Einstellungen definiert, nämlich einer Fokusstellung, bei der die LED einen größtmöglichen Abstand zu der Vorsatzoptik aufweist und der Mondstellung, bei der die Vorsatzoptik mit dem Halter in Anlage ist, so dass die LED nahezu in Höhe der rückwärtigen Fläche zum liegen kommt. Bei der Fokusstellung ist das abgestrahlte Licht auf einen relativ kleinen Lichtkegel begrenzt, so dass Objekte in großer Entfernung beleuchtet werden können. Bei der Mondstellung hingegen wird ein Lichtkegel mit einem möglichst großen Winkel erzeugt, wobei die Lichtverteilung bei der erfindungsgemäßen Taschenlampe innerhalb des Lichtkegels gleichmäßig ist und zum Rand hin scharf abfällt. Hierdurch wird eine besonders homogene Ausleuchtung geschaffen. Durch die erfindungsgemäße Konstruktion kann die bevorzugte Einstellung der Taschenlampe schnell gewählt werden ohne mühsam den richtigen Abstand zwischen der Vorsatzoptik und der LED zu suchen.The radiation characteristic of the flashlight according to the invention is essentially defined by two settings, namely a focus position in which the LED is at the greatest possible distance from the front lens and the moon position in which the front lens is in contact with the holder, so that the LED is almost at the height the rear surface comes to rest. In the focus position, the emitted light is limited to a relatively small cone of light, so that objects can be illuminated at a great distance. In contrast, at the moon position a cone of light is generated with the largest possible angle, the light distribution in the flashlight according to the invention being uniform within the cone of light and falling sharply towards the edge. This creates a particularly homogeneous illumination. Due to the construction according to the invention, the preferred setting of the flashlight can be selected quickly without laboriously searching for the correct distance between the front lens and the LED.

Vorteilhafte Ausgestaltungen der vorliegenden Erfindung werden im Folgenden sowie in den Unteransprüchen beschrieben.Advantageous embodiments of the present invention are described below and in the subclaims.

Nach einer ersten Ausführungsform ist vorgesehen, dass die Linearbewegung der Vorsatzoptik entlang der optischen Achse durch einen weiteren Anschlag begrenzt ist, der den größtmöglichen Abstand zwischen der LED und der Vorsatzoptik bildet, wobei die LED in dieser Stellung im Brennpunkt der Vorsatzoptik liegt. Je nach Konstruktion der Taschenlampe ist dieser Anschlag durch je eine Anschlagfläche an dem Taschenlampengehäuse und dem Lampenkopf oder innerhalb eines Verbindungselementes gebildet. Die Mondstellung, bei der das Licht homogen innerhalb eines definierten Lichtkegels abgestrahlt wird, ist dann optimal eingestellt, wenn der Halter in Anlage mit der Anschlagfläche der Vorsatzoptik ist und demnach die LED mit der Anschlagflächenebene nahezu zusammenfällt.According to a first embodiment, it is provided that the linear movement of the attachment optics along the optical axis is limited by a further stop, which forms the greatest possible distance between the LED and the attachment optics, the LED being in the focal point of the attachment optics in this position. Depending on the design of the flashlight, this stop is formed by a stop surface on the flashlight housing and the lamp head or within a connecting element. The moon position, in which the light is emitted homogeneously within a defined light cone, is optimally set when the holder is in contact with the stop surface of the front lens system and the LED therefore almost coincides with the stop surface plane.

Zur Ableitung der entstehenden Wärme ist vorzugsweise vorgesehen, dass der Halter wärmeleitfähige Flächen aufweist, die in Anlage mit dem Gehäuse sind. Beispielsweise kann hierzu eine ringförmige Anlagefläche auf der Unterseite des Halters vorgesehen sein, mit der er auf einem sockelförmigen Vorsprung innerhalb des Gehäuses anliegt. Als bevorzugte Materialien für die wärmeleitfähigen Flächen eignen sich insbesondere Aluminium, Kupfer oder Messing.To dissipate the heat generated, it is preferably provided that the holder has thermally conductive surfaces which are in contact with the housing. For example, an annular contact surface can be provided for this purpose on the underside of the holder, with which it rests on a base-shaped projection inside the housing. Aluminum, copper or brass are particularly suitable as preferred materials for the thermally conductive surfaces.

Die besondere Abstrahlcharakteristik der erfindungsgemäßen Taschenlampe wird im Wesentlichen durch die geometrische Ausgestaltung der Vorsatzoptik bestimmt, wobei hierzu die Längen- bzw. Größenverhältnisse von besonderer Bedeutung sind. Hierzu ist vorgesehen, dass das Verhältnis zwischen dem Durchmesser des Sammellinsenteils und dem Durchmesser des Reflektorteils 0,55 ± 0,1, vorzugsweise 0,55 ± 0,05 beträgt. Mit anderen Worten beträgt das Verhältnis zwischen dem Durchmesser des Sammellinsenteils und dem Durchmesser des Reflektorteils 0,55, wobei Abweichungen in der Größenordnung von 0,1, vorzugsweise von 0,5, sowohl in positiver als auch in negativer Richtung tolerabel sind. Das Verhältnis zwischen der Stärke des Sammellinsenteils und der Höhe des Reflektorteils beträgt 0,26 ± 0,05, vorzugsweise 0,26 ± 0,02.
In fokussierter Einstellung beträgt das Verhältnis zwischen dem Abstand der LED zur Anlagefläche zu dem Abstand der LED zu einer Mittelpunktsebene 0,4 ± 0,1, vorzugsweise 0,40 ± 0,05.The particular radiation characteristic of the flashlight according to the invention is essentially determined by the geometric configuration of the front lens system, the length or size relationships being of particular importance for this. For this purpose, it is provided that the ratio between the diameter of the collecting lens part and the diameter of the reflector part is 0.55 ± 0.1, preferably 0.55 ± 0.05. In other words, the ratio between the diameter of the converging lens part and the diameter of the reflector part is 0.55, with deviations of the order of 0.1, preferably of 0.5, being tolerable both in the positive and in the negative direction. The ratio between the thickness of the collecting lens part and the height of the reflector part is 0.26 ± 0.05, preferably 0.26 ± 0.02.
In the focused setting, the ratio between the distance of the LED to the contact surface to the distance of the LED to a center plane is 0.4 ± 0.1, preferably 0.40 ± 0.05.

Ferner ist vorzugsweise vorgesehen, dass die Sacklochbohrung eine konusförmige Mantelfläche besitzt, die gegenüber der Längsachse einen Öffnungswinkel von 23° ± 5°, vorzugsweise 23° ± 2°, aufweist.Furthermore, it is preferably provided that the blind hole has a conical surface which has an opening angle of 23 ° ± 5 °, preferably 23 ° ± 2 °, with respect to the longitudinal axis.

Nach einer besonders bevorzugten Ausführungsform sind verschiedene konkrete Bemaßungen der geometrischen Teile vorgesehen, wobei vorzugsweise der Durchmesser des Reflektorteils 20,8 ± 1 mm, der Durchmesser des Sammellinsenteils 11,4 ± 1 mm, die Höhe der Vorsatzoptik 11,6 ± 1 mm, die Stärke des Sammellinsenteils 3,04 ± 0,5 mm oder in fokussierten Einstellung der Abstand zwischen LED und Anlagefläche 3,58 ± 0,5 mm und der Abstand zwischen LED und einer Mittelpunktsebene 8,88 ± 1 mm beträgt.According to a particularly preferred embodiment, various concrete dimensions of the geometric parts are provided, preferably the diameter of the reflector part 20.8 ± 1 mm, the diameter of the collecting lens part 11.4 ± 1 mm, the height of the front lens 11.6 ± 1 mm Thickness of the collecting lens part 3.04 ± 0.5 mm or, in the focused setting, the distance between the LED and the contact surface is 3.58 ± 0.5 mm and the distance between the LED and a center plane is 8.88 ± 1 mm.

Dabei ist der Sammellinsenteil vorzugsweise durch zwei unterschiedlich stark konvex gekrümmte Flächen begrenzt, wobei der Radius der Lichteintrittsfläche größer ist als der Radius der Lichtaustrittsfläche.The collecting lens part is preferably delimited by two differently convexly curved surfaces, the radius of the light entry surface being larger than the radius of the light exit surface.

Weitere bevorzugte Ausgestaltungen sowie konkrete Ausführungsformen der vorliegenden Erfindung werden im Folgenden anhand der Figuren erläutert. Dabei zeigen:

Fig. 1a,b:
je eine Ausführungsform einer erfindungsgemäßen Taschenlampe in zwei verschiedenen Einstellungen,
Fig. 2:
eine Vorsatzoptik und
Fig. 3:
eine schematische Darstellung der Abstrahlcharakteristik einer Vorsatzoptik.
Further preferred configurations and specific embodiments of the present invention are explained below with reference to the figures. Show:
1a, b:
one embodiment of a flashlight according to the invention in two different settings,
Fig. 2:
a front lens and
Fig. 3:
is a schematic representation of the radiation characteristic of a front lens.

Nach einer konkreten Ausgestaltung einer erfindungsgemäßen Taschenlampe 1 besitzt diese eine Gehäuse 2, einen Lampenkopf 3, eine Vorsatzoptik 4 sowie eine LED 5. Dabei ist die Vorsatzoptik 4 in dem Lampenkopf 3 befestigt, der gegenüber dem Gehäuse 2 längsaxial verschiebbar ist. Gehäuseseitig ist die LED 5 auf einem Halter 6 befestigt, so dass insgesamt die Vorsatzoptik gegenüber der LED verschiebbar ist. Die Verschiebung des Lampenkopfes 3 bzw. der Vorsatzoptik 4 wird dabei durch zwei Anschläge begrenzt. Einerseits bildet der Halter 6 mit der Vorsatzoptik 4 eine Anlage, wozu die Vorsatzoptik 4 eine als Anschlagfläche 7 ausgebildete rückwärtige Fläche aufweist. Andererseits ist im dargestellten Ausführungsbeispiel die Verschiebung durch ein Verbindungselement 8 möglich, das den Lampenkopf 3 und das Gehäuse 2 miteinander verbindet und das einen (nicht dargestellten) Anschlag besitzt.According to a specific embodiment of a flashlight 1 according to the invention, it has a housing 2, a lamp head 3, an attachment lens 4 and an LED 5. The attachment lens 4 is fastened in the lamp head 3, which can be displaced longitudinally axially relative to the housing 2. On the housing side, LED 5 is on one Bracket 6 attached, so that the overall optics can be moved relative to the LED. The displacement of the lamp head 3 or the front lens 4 is limited by two stops. On the one hand, the holder 6 forms a system with the front lens system 4, for which purpose the front lens system 4 has a rear surface designed as a stop surface 7. On the other hand, in the exemplary embodiment shown, the displacement is possible by means of a connecting element 8 which connects the lamp head 3 and the housing 2 to one another and which has a stop (not shown).

Fig. 1a zeigt eine Einstellung, bei der die Vorsatzoptik 4 mit dem Halter 6 in Anlage ist, so dass die LED 5 mit der Anschlagflächenebene nahezu zusammenfällt. Bei dieser Einstellung ist die Abstrahlung durch einen großen Abstrahlwinkel gekennzeichnet, innerhalb dessen die Lichtverteilung homogen ist. Fig. 1b zeigt demgegenüber eine fokussierte Einstellung, wo die Vorsatzoptik 4 und der Halter im Abstand A zueinander angeordnet sind. Fig. 1a shows a setting in which the front lens system 4 is in contact with the holder 6, so that the LED 5 almost coincides with the plane of the stop surface. With this setting, the radiation is characterized by a large radiation angle within which the light distribution is homogeneous. Fig. 1b shows, in contrast, a focused setting, where the front lens 4 and the holder are arranged at a distance A from each other.

Konkrete Bemaßungen bzw. Größenverhältnisse einer Vorsatzoptik 4 sind in Fig. 2 gezeigt. Die Vorsatzoptik 4 besitzt einen inneren Sammellinsenteil 21, ein äußeres Reflektorteil 22 sowie eine rückwärtige Fläche 23, die eine Sacklochbohrung 24 besitzt. Die Sacklochbohrung 24 ist dabei durch eine konusförmige Mantelfläche 25 begrenzt, die gegenüber der Längsachse 26 einen Öffnungswinkel α von 23° besitzt. Der Durchmesser 27 des Reflektorteils 22 beträgt 20,8 mm, während der Sammellinsenteil 21 einen Durchmesser 28 von 11,4 mm aufweist. Die dargestellte Vorsatzoptik 4 ist insgesamt 11,6 mm hoch (Höhe 29) und der Sammellinsenteil besitzt eine Stärke 30 von 3,04 mm. In fokussierter Einstellung, also bei einem maximalen Abstand zwischen der Vorsatzoptik 4 und dem Halter 6, beträgt der Abstand 31 zwischen LED 5 und Anschlagfläche 23 3,58 mm und der Abstand 32 zwischen LED 5 und einer Mittelpunktsebene 33 beträgt 8,88 mm. Hieraus ergibt sich für das Verhältnis (31/32) zwischen dem Abstand 31 der LED 5 zur Anlagefläche 23 und dem Abstand 32 der LED zu der Mittelpunktsebene 33 ein Wert von 0,4, für das Verhältnis (28/27) zwischen dem Durchmesser 28 des Sammellinsenteils 21 und dem Durchmesser 27 des Reflektorteils 22 ein Wert von 0,55 und für das Verhältnis (30/29) der Stärke 30 des Sammellinsenteils 21 zu der Höhe 29 der Vorsatzoptik 4 ein Wert von 0,26.Concrete dimensions or proportions of a front lens 4 are in Fig. 2 shown. The front lens 4 has an inner collecting lens part 21, an outer reflector part 22 and a rear surface 23, which has a blind hole 24. The blind hole 24 is delimited by a conical surface 25 which has an opening angle α of 23 ° with respect to the longitudinal axis 26. The diameter 27 of the reflector part 22 is 20.8 mm, while the converging lens part 21 has a diameter 28 of 11.4 mm. The front lens 4 shown is a total of 11.6 mm high (height 29) and the collecting lens part has a thickness 30 of 3.04 mm. In a focused setting, that is, with a maximum distance between the front lens system 4 and the holder 6, the distance 31 between the LED 5 and the stop surface 23 is 3.58 mm and the distance 32 between the LED 5 and a center plane 33 is 8.88 mm. This results in a value of 0.4 for the ratio (31/32) between the distance 31 of the LED 5 to the contact surface 23 and the distance 32 of the LED to the center plane 33, for the ratio (28/27) between the diameter 28 of the collecting lens part 21 and the diameter 27 of the reflector part 22 a value of 0.55 and for the ratio (30/29) of Thickness 30 of the collecting lens part 21 to the height 29 of the front lens 4 a value of 0.26.

Fig. 3 zeigt schematisch den Strahlenverlauf in einer fokussierten Einstellung, wobei die von der LED 5 emittierten Lichtstrahlen auf den Sammellinsenteil 21 treffen, die in einem Winkel β von ± 32° abgestrahlt werden. Diese Lichtstrahlen werden von dem Sammellinsenteil 21 zu einem Lichtkegel 311 mit einem Kegelwinkel γ von 4° gebündelt. Die übrigen Lichtstrahlen werden in einem Winkel δ von 32° bis 60° von der LED 5 emittiert und treffen auf den Reflektorteil 22, der ein achsparalleles Strahlenbündel 321 erzeugt. Fig. 3 shows schematically the beam path in a focused setting, the light rays emitted by the LED 5 striking the converging lens part 21, which are emitted at an angle β of ± 32 °. These light beams are bundled by the converging lens part 21 to form a light cone 311 with a cone angle γ of 4 °. The remaining light beams are emitted by the LED 5 at an angle δ of 32 ° to 60 ° and hit the reflector part 22, which generates an axially parallel beam 321.

Claims (8)

  1. Torch with an optical attachment (4) which is rotationally symmetrical to an optical axis, comprising an outer reflection part (22), an inner converging lens part (21) and a rear surface (23) having a blind hole bore (24), and a light emitting diode (LED) (5) arranged on a disk-shaped holder (6), in which the diameter (27) of the reflector part (22) is 20,8 mm ± 0,1 mm, the diameter (28) of the converging lens part (21) is 11,4 mm ± 1 mm and the height (29) of the optical attachment (4) is 11,6 mm ± 1 mm, characterized in that the optical attachment (4) is movable in a limited manner between two stops in relation to the LED (5), so that at an end stop of the optical attachment (4) at the holder (6) a substantially homogenous light cone is generated, wherein the thickness (3) of the converging lens part (21) is 3,04 mm ± 0,5 mm and in a focused setting the spacing (31) between LED (5) and contact face (23) is 3,58 mm ± 0,5 mm and the spacing (32) between LED (5) and a center point plane (32) is 8,88 mm ± 1 mm.
  2. Torch according to claim 1, characterized in that the linear movement of the optical attachment (4) along the optical axis is limited by a further stop that forms the greatest possible distance between the LED (5) and the optical attachment (4), wherein the LED (5) lies in the focal point of the optical attachment (4) in this setting.
  3. Torch according to one of the claims 1 or 2, characterized in that the holder (6) has heat-conductive surfaces that are in contact with a housing (2).
  4. Torch according to one of the claims 1 to 3, characterized in that the ratio (28/27) between the diameter (28) of the converging lens part (21) and the diameter (27) of the reflection part (22) is 0,55 ± 0,1, preferably 0,55 ± 0,05.
  5. Torch according to one of the claims 1 to 4, characterized in that the ratio (30/29) between the thickness (30) of the converging lens part and the height (29) of the reflector part (22) is 0,26 ± 0,02.
  6. Torch according to one of the claims 1 to 5, characterized in that in a focused setting the ration (31, 32) between the spacing (31) of the LED and the contact surface and the spacing (32) of the LED and the centerpoint plane (33) is 0,4 ± 0,1, preferably 0,40 ± 0,05.
  7. Torch according to one of the claims 1 to 6, characterized in that the blind hole bore (24) has a conical shaped shell surface (25) which has an aperture angle of 23° ± 5°, preferably 23° ± 2°.
  8. Torch according to one of the claims 1 to 7, characterized in that the converging lens part (21) is limited by two surfaces having differently convex curved surfaces, wherein the radius of the light entry surface is greater than the radius of the light exit surface.
EP11809298.0A 2010-07-16 2011-07-12 Torch with a rotationally symmetrical optical attachment Active EP2593711B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010027326.0A DE102010027326B4 (en) 2010-07-16 2010-07-16 Pocket lamp with rotationally symmetrical lens
PCT/DE2011/001453 WO2012010153A2 (en) 2010-07-16 2011-07-12 Torch with a rotationally symmetrical optical attachment

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EP2593711A2 EP2593711A2 (en) 2013-05-22
EP2593711B1 true EP2593711B1 (en) 2020-02-12

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US (1) US8770783B2 (en)
EP (1) EP2593711B1 (en)
JP (1) JP5795063B2 (en)
CN (1) CN103026122A (en)
AU (1) AU2011282009B2 (en)
DE (1) DE102010027326B4 (en)
WO (1) WO2012010153A2 (en)

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EP3473926B1 (en) * 2017-10-23 2020-04-08 Glashütte Limburg Leuchten GmbH + Co. KG Lighting apparatus and method for attachment of two parts thereof
USD879345S1 (en) 2018-02-01 2020-03-24 E. Mishan & Sons, Inc. Flashlight

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US8770783B2 (en) 2014-07-08
AU2011282009A1 (en) 2013-01-17
AU2011282009B2 (en) 2015-02-12
WO2012010153A2 (en) 2012-01-26
WO2012010153A3 (en) 2012-06-07
EP2593711A2 (en) 2013-05-22
JP2013531347A (en) 2013-08-01
US20130107509A1 (en) 2013-05-02
CN103026122A (en) 2013-04-03
DE102010027326A1 (en) 2012-01-19
DE102010027326B4 (en) 2020-08-13
JP5795063B2 (en) 2015-10-14

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