EP2593711A2 - Torch with a rotationally symmetrical optical attachment - Google Patents

Torch with a rotationally symmetrical optical attachment

Info

Publication number
EP2593711A2
EP2593711A2 EP11809298.0A EP11809298A EP2593711A2 EP 2593711 A2 EP2593711 A2 EP 2593711A2 EP 11809298 A EP11809298 A EP 11809298A EP 2593711 A2 EP2593711 A2 EP 2593711A2
Authority
EP
European Patent Office
Prior art keywords
led
flashlight according
attachment optics
distance
lens part
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
EP11809298.0A
Other languages
German (de)
French (fr)
Other versions
EP2593711B1 (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
Zweibrueder Optoelectronics GmbH
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 Zweibrueder Optoelectronics GmbH filed Critical Zweibrueder Optoelectronics GmbH
Publication of EP2593711A2 publication Critical patent/EP2593711A2/en
Application granted granted Critical
Publication of EP2593711B1 publication Critical patent/EP2593711B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 a rotationally symmetrical to an optical axis attachment optics, which has an outer reflector part, an inner collection lens part and a rear surface with a blind hole, and arranged on a disk-shaped holder light emitting diode (LED).
  • LED disk-shaped holder light emitting diode
  • Flashlights of the type mentioned with the described attachment optics are basically known in the prior art.
  • US Pat. No. 2,254,962 describes various attachment optics, with a light source being displaceable within the rear blind bore in order to change the emission characteristic.
  • the light source between two points along the axial axial movement, both of which are arranged within the blind hole.
  • the opening angle of a light cone is essentially changed, so that objects can be illuminated at different distances.
  • a disadvantage of the known flashlights with the described attachment optics is that the light intensity is not uniform within the light cone, with the intensity on the optical axis is usually greatest, while it steadily decreases towards the edge of the light cone.
  • a flashlight is to be created, in which the emission characteristic between a so-called moon position and a stetlung can be adjusted.
  • the moon position a cone of light is generated with a large opening angle and a homogeneous light distribution.
  • the focus division is characterized by a cone of light with a comparatively small opening angle.
  • CONFIRMATION COPY be easy, so that the desired setting can be found quickly and reliably
  • the attachment optics relative to the LED is so limited by two stops displaceable that at a plant of the attachment optics on the holder, a substantially homogeneous light beam is generated.
  • the radiation characteristic of the flashlight according to the invention is essentially defined by two settings, namely a focus position in which the LED has a maximum distance from the attachment optics and the moon position, in which the attachment optics with the holder in Appendix, so that the LED almost in Height of the rear surface comes to rest.
  • a focus position in which the LED has a maximum distance from the attachment optics
  • the moon position in which the attachment optics with the holder in Appendix, so that the LED almost in Height of the rear surface comes to rest.
  • radiated light is limited to a relatively small cone of light, so that objects can be illuminated at a great distance.
  • a cone of light is generated with the largest possible angle, the light distribution in the flashlight according to the invention within the light cone is uniform and drops sharply towards the edge. This will be a particularly homogeneous
  • the linear movement of the attachment optics along the optical axis is limited by a further stop, which forms the largest possible distance between the LED and the attachment optics, wherein the LED is in this position in the focal point of the attachment optics.
  • this stop is formed by a respective stop surface on the flashlight housing and the lamp head or within a connecting element. The moon position, where the light is homogeneous within a defined light cone is then optimally adjusted when the holder is in contact with the stop surface of the attachment optics and therefore the LED almost coincides with the stop surface plane.
  • the holder has thermally conductive surfaces which are in contact with the housing.
  • this can be provided on the underside of the holder an annular contact surface, with which it rests on a sockeiförmigen projection within the housing.
  • Particularly preferred materials for the heat-conductive surfaces are aluminum, copper or brass.
  • the particular radiation characteristic of the flashlight according to the invention is essentially determined by the geometric configuration of the attachment optics, for which purpose the length or size relationships are of particular importance.
  • the ratio between the diameter of the reflector part and the diameter of the collecting lens part is 0.55 ⁇ 0.1, preferably 0.55 ⁇ 0.05.
  • the ratio between the diameter of the reflector portion and the diameter of the collecting lens portion is 0.55, with deviations of the order of 0.1, preferably 0.5, being tolerable in both the positive and negative directions.
  • the ratio between the thickness of the collecting lens portion and the height of the reflector nozzle is preferably 0.17 + 0.05, preferably 0.17 ⁇ 0.02.
  • the ratio between the distance of the LED to the abutment surface to the distance of the LED to a midpoint plane is 0.4 ⁇ 0.1, preferably 0.40 ⁇ 0.05.
  • the blind hole has a conical lateral 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, wherein preferably the diameter of the reflector part 20.8 + 1 mm, the diameter of the collecting lens part 1 1, 4 ⁇ 1 mm, the height of the attachment optics 11, 6 ⁇ 1 mm, the thickness of the collecting lens part is 3.04 ⁇ 0.5 mm or in 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 egg is preferably delimited by two surfaces of different convex curvature, wherein the radius of the light entry surface is greater than the radius of the light exit surface.
  • Fig. 2 a front optics
  • 3 shows a schematic representation of the emission characteristic of a
  • a flashlight 1 has a housing 2, a lamp head 3, a lens attachment 4 and a LED 5.
  • the attachment optics 4 is mounted in the lamp head 3, which is longitudinal axial displaceable relative to the housing 2.
  • the LED 5 is mounted on a holder 6, so that overall the attachment optics is displaceable relative to the LED.
  • the displacement of the lamp head 3 and the attachment optics 4 is limited by two stops.
  • the holder 6 with the attachment optics 4 forms a system, for which purpose the attachment optics 4 has a rear surface formed as a stop surface 7.
  • the displacement by a connecting element 8 is possible, which connects the lamp head 3 and the housing 2 with each other and which has a (not shown) stop.
  • FIG. 1 a shows a setting in which the optical attachment 4 is in contact with the holder 6, so that the LED 5 almost coincides with the stop surface plane.
  • the emission is characterized by a large emission angle, within which the light distribution is homogeneous.
  • FIG. 1 b shows a focused setting, where the optical attachment 4 and the holder are arranged at a distance A from each other.
  • the attachment optics 4 has an inner collection lens part 21, an outer reflector part 22 and a rear surface 23 which has a blind hole 24.
  • the blind bore 24 is delimited by a conical lateral 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 collecting lens part 21 has a diameter 28 of 1, 4 mm.
  • the illustrated optical attachment 4 is a total of 11, 6 mm high (height 29) and the collection lens part has a thickness 30 of 3.04 mm.
  • the distance 31 between LED 5 and stop surface 23 is 3.58 mm and the distance 32 between LED 5 and a mid-plane 33 is 8.88 mm.
  • 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 a value of 0.4
  • the ratio (28/27) between the diameter 28th of the collecting lens part 21 and the diameter 27 of the reflector part 22 has a value of 0.55 and for the ratio (30/29) of the thickness 30 of the collecting lens part 21 to the height 29 of the optical attachment 4 a value of 0.26.
  • Fig. 3 shows schematically the beam path in a focused setting, wherein the light beams emitted from the LED 5 meet the collecting lens part 21, the radiated at an angle ß of ⁇ 32 °. These light rays are condensed by the collecting lens part 21 into a light cone 31 having a cone angle ⁇ of 4 °. The remaining light beams are emitted by the LED 5 at an angle ⁇ of 32 ° to 60 ° and strike the reflector part 22, which generates an axis-parallel beam 32.

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)
  • Stroboscope Apparatuses (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Led Device Packages (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)

Abstract

The invention relates to a torch comprising an optical attachment (4) which is rotationally symmetrical to an optical axis (26), which comprises an outer reflector part (22), an inner converging lens part (21) and a rear surface (23) having a blind hole bore (24), and an illuminating diode (LED) arranged on disk-shaped holder (6). According to the invention, in order to provide a torch with an optical attachment, in which the emission characteristic can be adjusted between a wide mode and a focus mode, in which the torch is as easy to use as possible and desired focusing can be achieved in a fast and reliable manner, the optical adapter can be displaced in relation to the LED in a defined manner between two stops such that when the optical attachment is placed on the holder, an essentially homogenous beam of light is produced.

Description

Taschenlampe mit rotationssymmetrischer Vorsatzoptik  Flashlight with rotationally symmetrical attachment optics
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). The present invention relates to a flashlight with a rotationally symmetrical to an optical axis attachment optics, which has an outer reflector part, an inner collection lens part and a rear surface with a blind hole, and arranged on a disk-shaped holder light emitting diode (LED).
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 with the described attachment optics are basically known in the prior art. For example, US Pat. No. 2,254,962 describes various attachment optics, with a light source being displaceable within the rear blind bore in order to change the emission characteristic. The light source between two points along the axial axial movement, both of which are arranged within the blind hole. By a linear movement of the light source, the opening angle of a light cone is essentially changed, so that objects can be illuminated at different distances.
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 attachment optics is that the light intensity is not uniform within the light cone, with the intensity on the optical axis is usually greatest, while it steadily decreases 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 Fokusstetlung eingestellt werden kann. Bei der Mondstellung wird ein Lichtkegel mit einem großen Öffnungswinkef und darin homogener Lichtverteiiung erzeugt. Demgegenüber ist die Fokussteilung durch einen Lichtkegel mit einem vergleichsweise kleinen Öffnungswinkel gekennzeichnet. Dabei soll die Bedienbarkeit der Taschenlampe möglichst It is therefore an 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 emission characteristic between a so-called moon position and a Fokusstetlung can be adjusted. In the moon position, a cone of light is generated with a large opening angle and a homogeneous light distribution. In contrast, the focus division is characterized by a cone of light with a comparatively small opening angle. The operability of the flashlight should be as possible
BESTÄTIGUNGSKOPIE einfach sein, womit die gewünschte Einstellung schnell und zuverlässig gefunden werden kann CONFIRMATION COPY be easy, 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. This object is achieved by the flashlight according to claim 1, wherein according to the invention the attachment optics relative to the LED is so limited by two stops displaceable that at a plant of the attachment optics on the holder, a substantially homogeneous light beam is generated.
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 Mond Stellung, 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 The radiation characteristic of the flashlight according to the invention is essentially defined by two settings, namely a focus position in which the LED has a maximum distance from the attachment optics and the moon position, in which the attachment optics with the holder in Appendix, so that the LED almost in Height of the rear surface comes to rest. In the focus position that is
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 radiated light is limited to a relatively small cone of light, so that objects can be illuminated at a great distance. In the moon position, however, a cone of light is generated with the largest possible angle, the light distribution in the flashlight according to the invention within the light cone is uniform and drops sharply towards the edge. This will be a particularly homogeneous
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. Illumination created. Due to the construction according to the invention, the preferred setting of the flashlight can be quickly selected without laboriously seeking the correct distance between the attachment optics 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 largest possible distance between the LED and the attachment optics, wherein the LED is in this position in the focal point of the attachment optics. Depending on the design of the flashlight, this stop is formed by a respective stop surface on the flashlight housing and the lamp head or within a connecting element. The moon position, where the light is homogeneous within a defined light cone is then optimally adjusted when the holder is in contact with the stop surface of the attachment optics and therefore the LED 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 sockeiförmigen Vorsprung innerhalb des Gehäuses anliegt. Als bevorzugte Materialien für die wärmeleitfähigen Flächen eignen sich insbesondere Aluminium, Kupfer oder Messing. To derive the resulting heat, it is preferably provided that the holder has thermally conductive surfaces which are in contact with the housing. For example, this can be provided on the underside of the holder an annular contact surface, with which it rests on a sockeiförmigen projection within the housing. Particularly preferred materials for the heat-conductive surfaces are aluminum, copper or brass.
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 vorzugsweise vorgesehen, dass das Verhältnis zwischen dem Durchmesser des Reflektorteils und dem Durchmesser des Sammellinsenteils 0,55 ± 0,1 , vorzugsweise 0,55 ± 0,05 beträgt. Mit anderen Worten beträgt das Verhältnis zwischen dem Durchmesser des Reflektorteils und dem Durchmesser des Sammellinsenteils 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 Reflektorteüs beträgt vorzugsweise 0,17 + 0,05, vorzugsweise 0,17 ± 0,02. The particular radiation characteristic of the flashlight according to the invention is essentially determined by the geometric configuration of the attachment optics, for which purpose the length or size relationships are of particular importance. For this purpose, it is preferably provided that the ratio between the diameter of the reflector part and the diameter of the collecting lens part is 0.55 ± 0.1, preferably 0.55 ± 0.05. In other words, the ratio between the diameter of the reflector portion and the diameter of the collecting lens portion is 0.55, with deviations of the order of 0.1, preferably 0.5, being tolerable in both the positive and negative directions. The ratio between the thickness of the collecting lens portion and the height of the reflector nozzle is preferably 0.17 + 0.05, preferably 0.17 ± 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. In a focused setting, the ratio between the distance of the LED to the abutment surface to the distance of the LED to a midpoint 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. 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 1 1 ,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 Mittel punktsebene 8,88 ± 1 mm beträgt. Furthermore, it is preferably provided that the blind hole has a conical lateral surface, which has an opening angle of 23 ° ± 5 °, preferably 23 ° ± 2 ° with respect to the longitudinal axis. According to a particularly preferred embodiment, various concrete dimensions of the geometric parts are provided, wherein preferably the diameter of the reflector part 20.8 + 1 mm, the diameter of the collecting lens part 1 1, 4 ± 1 mm, the height of the attachment optics 11, 6 ± 1 mm, the thickness of the collecting lens part is 3.04 ± 0.5 mm or in 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 Sammellinsenteii vorzugsweise durch zwei unterschiedlich stark konvex gekrümmte Flächen begrenzt, wobei der Radius der Lichteintrittsfläche größer äst als der Radius der Lichtaustrittsfläche. In this case, the collecting lens egg is preferably delimited by two surfaces of different convex curvature, wherein the radius of the light entry surface is greater 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: Further preferred embodiments and specific embodiments of the present invention are explained below with reference to the figures. Showing:
Fig. 1 a,b: je eine Ausführungsform einer erfindungsgemäßen Taschenlampe in zwei verschiedenen Einstellungen, 1 a, b: one embodiment of a flashlight according to the invention in two different settings,
Fig. 2: eine Vorsatzoptik und Fig. 2: a front optics and
Fig. 3: eine schematische Darstellung der Abstrahlcharakteristik einer 3 shows a schematic representation of the emission characteristic of a
Vorsatzoptik.  Optical head.
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 this has a housing 2, a lamp head 3, a lens attachment 4 and a LED 5. Here, the attachment optics 4 is mounted in the lamp head 3, which is longitudinal axial displaceable relative to the housing 2. On the housing side, the LED 5 is mounted on a holder 6, so that overall the attachment optics is displaceable relative to the LED. The displacement of the lamp head 3 and the attachment optics 4 is limited by two stops. On the one hand, the holder 6 with the attachment optics 4 forms a system, for which purpose the attachment optics 4 has a rear surface formed as a stop surface 7. On the other hand, in the illustrated embodiment the displacement by a connecting element 8 is possible, which connects the lamp head 3 and the housing 2 with each other and which has a (not shown) stop.
Fig. 1 a 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. 1 b zeigt demgegenüber eine fokussierte Einstellung, wo die Vorsatzoptik 4 und der Halter im Abstand A zueinander angeordnet sind. Fig. 1 a shows a setting in which the optical attachment 4 is in contact with the holder 6, so that the LED 5 almost coincides with the stop surface plane. In this setting, the emission is characterized by a large emission angle, within which the light distribution is homogeneous. In contrast, FIG. 1 b shows a focused setting, where the optical attachment 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 von 23° besitzt. Der Durchmesser 27 des Reflektorteils 22 beträgt 20,8 mm, während der Sammellinsenteil 21 einen Durchmesser 28 von 1 ,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 shown in Fig. 2. The attachment optics 4 has an inner collection lens part 21, an outer reflector part 22 and a rear surface 23 which has a blind hole 24. The blind bore 24 is delimited by a conical lateral 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 collecting lens part 21 has a diameter 28 of 1, 4 mm. The illustrated optical attachment 4 is a total of 11, 6 mm high (height 29) and the collection lens part has a thickness 30 of 3.04 mm. In a focused setting, ie at a maximum distance between the attachment optics 4 and the holder 6, the distance 31 between LED 5 and stop surface 23 is 3.58 mm and the distance 32 between LED 5 and a mid-plane 33 is 8.88 mm. It follows 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, a value of 0.4, for the ratio (28/27) between the diameter 28th of the collecting lens part 21 and the diameter 27 of the reflector part 22 has a value of 0.55 and for the ratio (30/29) of the thickness 30 of the collecting lens part 21 to the height 29 of the optical attachment 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 ß von ± 32° abgestrahlt werden. Diese Lichtstrahlen werden von dem Sammellinsenteil 21 zu einem Lichtkegel 31 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 32 erzeugt. Fig. 3 shows schematically the beam path in a focused setting, wherein the light beams emitted from the LED 5 meet the collecting lens part 21, the radiated at an angle ß of ± 32 °. These light rays are condensed by the collecting lens part 21 into a light cone 31 having 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 strike the reflector part 22, which generates an axis-parallel beam 32.

Claims

Ansprüche claims
1. Taschenlampe mit einer zu einer optischen Achse (26) rotationssymmetrischen Vorsatzoptik (4), die einen äußeren Reflektorteil (22), einen inneren Sammellinsenteil (21 ) sowie eine rückwärtige Fläche (23) mit einer Sacklochbohrung (24) besitzt, und einer auf einem scheibenförmigen Halter (6) angeordneten Leuchtdiode (LED) (5), 1. flashlight with an optical axis (26) rotationally symmetrical attachment optics (4) having an outer reflector part (22), an inner collection lens part (21) and a rear surface (23) with a blind hole (24), and one on a disc-shaped holder (6) arranged light-emitting diode (LED) (5),
d a d u r c h g e k e n n z e i c h n e t, d a s s  d a d u r c h e s e n c i n e s, d a s s
die Vorsatzoptik (4) gegenüber der LED (5) derart durch 2 Anschläge begrenzt verschiebbar ist, dass bei einer Anlage der Vorsatzoptik (4) an dem Halter (6) ein im wesentlichen homogener Lichtkegel erzeugt wird.  the attachment optics (4) relative to the LED (5) is so limited by 2 stops limited that when a system of the attachment optics (4) on the holder (6), a substantially homogeneous beam of light is generated.
2. Taschenlampe nach Anspruch 1 , dadurch gekennzeichnet, dass die 2. Flashlight according to claim 1, characterized in that the
Linearbewegung der Vorsatzoptik (4) entlang der optischen Achse durch einen weiteren Anschlag begrenzt ist, der den größtmöglichen Abstand zwischen der LED (5) und der Vorsatzoptik (4) bildet, wobei die LED (5) in dieser Stellung im Brennpunkt der Vorsatzoptik (4) liegt.  Linear movement of the attachment optics (4) along the optical axis is limited by a further stop, which forms the largest possible distance between the LED (5) and the attachment optics (4), wherein the LED (5) in this position in the focal point of the attachment optics (4 ) lies.
3. Taschenlampe nach einem der Ansprüche 1 oder 2, dadurch 3. Flashlight according to one of claims 1 or 2, characterized
gekennzeichnet, dass der Halter (6) wärmeleitfähige Flächen aufweist, die in Anlage mit einem Gehäuse (2) sind.  in that the holder (6) has thermally conductive surfaces which are in contact with a housing (2).
4. Taschenlampe nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Verhältnis (27/28) zwischen dem Durchmesser (27) des Reflektorteils (22) und dem Durchmesser (28) des Sammellinsenteils (21 ) 0,55 + 0,1 , vorzugsweise 0,55 ± 0,05, beträgt. 4. Flashlight according to one of claims 1 to 3, characterized in that the ratio (27/28) between the diameter (27) of the reflector part (22) and the diameter (28) of the collecting lens part (21) 0.55 + 0, 1, preferably 0.55 ± 0.05.
5. Taschenlampe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Verhältnis (30/29) zwischen der Stärke (30) des Sammellinsenteils und der Höhe (29) des Reflektorteils (22) 0,17 ± 0,05, vorzugsweise zwischen 0,17 ± 0,02, beträgt. Taschenlampe nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass in fokussierter Einstellung das Verhältnis (31/32) zwischen dem Abstand (31 ) der LED zur Anlagefläche zu dem Abstand (32) der LED zu einer Mittelpunktsebene (33) 0,4 ± 0,1 , vorzugsweise 0,40 ± 0,05, beträgt. 5. Flashlight according to one of claims 1 to 4, characterized in that the ratio (30/29) between the thickness (30) of the collecting lens part and the height (29) of the reflector part (22) 0.17 ± 0.05, preferably between 0.17 ± 0.02. Flashlight according to one of claims 1 to 5, characterized in that in a focused setting, the ratio (31/32) between the distance (31) of the LED to the contact surface to the distance (32) of the LED to a center plane (33) 0.4 ± 0.1, preferably 0.40 ± 0.05.
Taschenlampe nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Sacklochbohrung (24) eine konusförmige Mantelfläche (25) besitzt, die gegenüber der Längsachse (26) ein Öffnungswinkel von 23° ± 5°, vorzugsweise 23° ± 2°, aufweist. Flashlight according to one of claims 1 to 6, characterized in that the blind hole (24) has a cone-shaped lateral surface (25), with respect to the longitudinal axis (26) has an opening angle of 23 ° ± 5 °, preferably 23 ° ± 2 ° ,
Taschenlampe nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass Flashlight according to one of claims 1 to 7, characterized in that
a) der Durchmesser (27) des Reflektorteils (22) (20,8 ± 1 ) mm, b) der Durchmesser (28) des Sammellinsenteils (21 ) (1 1 ,4 ± 1) mm, c) die Höhe (29) der Vorsatzoptik (4) (1 1 ,6 ± 1) mm, a) the diameter (27) of the reflector part (22) (20.8 ± 1) mm, b) the diameter (28) of the collecting lens part (21) (1 1, 4 ± 1) mm, c) the height (29) the optical attachment (4) (1 1, 6 ± 1) mm,
d) die Stärke (30) des Sammellinsenteils (21 ) (3,04 + 0,5) mm oder e) in fokussierter Einstellung der Abstand (31 ) zwischen LED (5) und Anlagefläche (23) (3,58 ± 0,5) mm und der Abstand (32) zwischen LED (5) und einer Mittelpunktsebene (32) (8,88 ± 1 ) mm beträgt. d) the thickness (30) of the collecting lens part (21) (3.04 + 0.5) mm or e) in focused setting the distance (31) between LED (5) and contact surface (23) (3.58 ± 0, 5) mm and the distance (32) between LED (5) and a center plane (32) (8,88 ± 1) mm.
Taschenlampe nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Sammellinsenteil (21 ) durch zwei unterschiedlich stark konvex gekrümmte Flächen begrenzt ist, wobei der Radius der Lichteintrittsfläche größer ist als der Radius der Lichtaustrittsfläche. Flashlight according to one of claims 1 to 8, characterized in that the collecting lens part (21) is bounded by two differently convexly 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)

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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 true EP2593711A2 (en) 2013-05-22
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EP (1) EP2593711B1 (en)
JP (1) JP5795063B2 (en)
CN (1) CN103026122A (en)
AU (1) AU2011282009B2 (en)
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USD879345S1 (en) 2018-02-01 2020-03-24 E. Mishan & Sons, Inc. Flashlight

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DE102010027326A1 (en) 2012-01-19
EP2593711B1 (en) 2020-02-12
WO2012010153A3 (en) 2012-06-07
WO2012010153A2 (en) 2012-01-26
DE102010027326B4 (en) 2020-08-13
AU2011282009B2 (en) 2015-02-12
CN103026122A (en) 2013-04-03
AU2011282009A1 (en) 2013-01-17
US8770783B2 (en) 2014-07-08
JP2013531347A (en) 2013-08-01
US20130107509A1 (en) 2013-05-02

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