EP1392999B1 - Taschenlampe - Google Patents

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Publication number
EP1392999B1
EP1392999B1 EP02738106A EP02738106A EP1392999B1 EP 1392999 B1 EP1392999 B1 EP 1392999B1 EP 02738106 A EP02738106 A EP 02738106A EP 02738106 A EP02738106 A EP 02738106A EP 1392999 B1 EP1392999 B1 EP 1392999B1
Authority
EP
European Patent Office
Prior art keywords
flashlight
light emitting
accordance
light
emitting diodes
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.)
Expired - Lifetime
Application number
EP02738106A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1392999A1 (de
Inventor
Peter Rausseck
Günter Hoche
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.)
Mellert Slt & Co KG GmbH
Original Assignee
Mellert Slt & Co KG 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 Mellert Slt & Co KG GmbH filed Critical Mellert Slt & Co KG GmbH
Publication of EP1392999A1 publication Critical patent/EP1392999A1/de
Application granted granted Critical
Publication of EP1392999B1 publication Critical patent/EP1392999B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • F21V11/06—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 using crossed laminae or strips, e.g. grid-shaped louvers; using lattices or honeycombs
    • 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
    • F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
    • 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
    • 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
    • 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 light-emitting diodes.
  • Flashlights with light emitting diodes serving as light sources are basically known.
  • focusing elements are provided in the emission direction in front of the light emitting diodes in order to focus the light of the light emitting diodes and thus to achieve a sufficient illuminance even at greater distances on a limited area.
  • a lighting device which may be designed for use as a portable lamp or as a permanently installed lamp.
  • the illumination device has two or more light sources which emit light in different spectral ranges. Parameters of an electrical circuit serving the light sources are set so that the spectral energy distribution of illumination beams used to illuminate objects and surfaces can be shaped such that the perception and discrimination of information shown on the objects and surfaces by an observer can be improved and on the other hand, the radiation is reduced in non-desired spectral ranges.
  • a flashlight which has an incandescent lamp arranged in a reflector as well as light-emitting diodes for red and green colors arranged annularly around the incandescent lamp. The light bulb and the LEDs are covered by a plate-shaped cover.
  • a flashlight comprising a light bulb, a lens having a central convex portion and an annular planar portion surrounding it, a reflector which serves to radiate rays from the incandescent lamp through the annular portion of the lens in a substantially collimated light beam, and includes an opaque shield.
  • the shield is displaceable in the emission direction in order to allow light emitted by the incandescent lamp optionally to fall onto the reflector or to shield it from the emitted radiation.
  • DE 200 21 934 U1 describes a lamp, in particular a flashlight, with a plurality of light sources. All the light sources are light-emitting diodes, which are arranged side by side in each case centered in a reflector surrounding the respective light-emitting diode.
  • the reflectors are honeycomb-like connected to a one-piece body. Light emitted by the light-emitting diodes is directed by the reflectors directly onto objects to be illuminated.
  • a flashlight according to the invention has a flashlight base body and a lamp head.
  • This lamp head comprises at least two light emitting diodes and one each, one of the light emitting diodes associated optical means for focusing the light emitted by the respective light emitting diode.
  • the devices for bundling the light emitted by the respective light-emitting diode may, in particular, be converging lenses such as, for example, plano-convex or biconvex lenses.
  • a tube is arranged in each case between one of the light-emitting diodes and the associated optical device for focusing the light emitted by the respective light-emitting diode.
  • the tubes are designed so that they each largely prevent penetration of light from one of the light-emitting diodes into another optical device associated with the light-emitting diodes for focusing the light emitted by the respective light-emitting diode.
  • the tubes according to the invention prevents stray light of a light emitting diode in optical devices for focusing the light emitted by other light emitting diodes falls and after distraction by this to comparatively weakly illuminated areas in the of the flashlight generated light pattern leads to greater distance.
  • the tubes are formed so that the light emerging from them of the corresponding light emitting diodes substantially completely falls on the corresponding associated optical means for focusing the light emitted by the respective light emitting diode.
  • the light entry surface of the imaging device must not be significantly smaller than the opening area of the tube.
  • the tube acts as an aperture diaphragm, resulting in the light pattern at a greater distance with a corresponding focus sharply demarcated, the light emitting diodes associated areas.
  • the sharp demarcation a pleasant and attractive light pattern.
  • the tubes are preferably made of a non-transparent or translucent material, but in principle it is also sufficient that the inner or outer surface of the tubes coated in each case opaque is. Particularly preferably, the inner surface of the tubes is not reflective, with a pure light scattering is possible, but preferably also greatly reduced. Particularly advantageous, since easy to manufacture, the surface of the tubes is matted for this purpose.
  • the tubes can also be formed only by partitions and the housing of the lamp head, the interior of at least one of the tubes is rotationally symmetrical.
  • This cross section of the interior corresponds on the one hand to the emission characteristic of the light emitting diodes and, on the other hand, results in a very attractive, because circular light pattern.
  • such tubes are particularly easy to manufacture.
  • the optical device associated with this light-emitting diode is generally larger in area than the associated light-emitting diode in order to concentrate its light. Therefore, it is particularly preferred if at least a portion of the interior of the tubes has a truncated cone shape.
  • the tubes should in principle only be located between the light-emitting diode and the optical device associated with this light emitting diode for bundling the light emitted by the latter and, in particular, shorter than the distance between the light-emitting diode and the associated device for focusing the light emitted by the latter, it is preferred that the tubes are held on a base member and the LEDs facing ends receive at least parts of the filament of the LEDs.
  • an end of at least one tube assigned to a light-emitting diode adjoins the optical device assigned to this light-emitting diode for bundling the light emitted by this light-emitting diode or an element holding it.
  • this effect can also be achieved by appropriate shaping of the base element, for example by integrally formed spacers, however, at least in the case in which the ends of all the tubes adjoin the corresponding optical devices for bundling the light emitted by the light-emitting diodes, the result Another advantage that also scattered light by reflection at the optical means for focusing the light emitted by the respective light emitting diodes can not readily fall into the interior of the lamp head between the tubes and can be reflected from there, so that the resulting unwanted scattered light is suppressed.
  • the base member and tubes are integrally formed, which allows for a simple and cost-effective production, for example as a plastic injection molded part, and on the other hand ensures a particularly stable against interference alignment of the tubes to each other.
  • the base part has substantially the form of a light-collecting reflector, resulting in a very stable support of the tubes, since they are connected to the base part along its circumference and also in its longitudinal direction. On the other hand results in viewing contrary to the direction of light from ordinary flashlights ago known and appealing image.
  • the optical means for focusing the light emitted by the respective light emitting diodes are arranged inclined to each other so that each formed by the optical devices bundles of light emitted from the light emitting diode intersect in a predetermined range.
  • the predetermined range can be given for example by a typical working distance of the flashlight of an object to be illuminated, for example, between 5 and 10 m, or the luminous intensity of the LEDs.
  • the given range not only a greater illuminance, but also a better delineated and more homogeneous light pattern.
  • the inclination of the optical axes and the position and focal length of the lenses are chosen so that the image of the LEDs is in the intersection of the bundle. It then results in the predetermined range as a light pattern essentially a circle without disturbing, the circle surrounding reflections.
  • the light-emitting diodes are preferably held on a printed circuit board which has contact elements for contacting current supply contacts provided in the flashlight base body or batteries or accumulators which can be inserted into the flashlight base body. This results in a particularly simple mounting of the LEDs, at the same time the current paths can be particularly short.
  • the contact elements in this case comprise a first annular contact surface and a second, arranged within the first contact surface further substantially annular or circular contact surface.
  • the base element is arranged on the printed circuit board, since this results in a compact arrangement of the components on the one hand and on the other possible damage to the power supply lines for the LEDs can be easily avoided by a relative movement of the base member and circuit board.
  • the optical means for condensing the light emitted from the respective light emitting diodes may basically be individually held in respective holders, it is preferable that the optical means for condensing the light emitted from the respective light emitting diode are lenses integrated with a front member.
  • the front element can be translucent or opaque in the areas without lenses, which can be achieved by means of corresponding coatings, but is preferably entirely transparent, since it then becomes transparent, for example. can be very simple and inexpensive to produce plastic injection molded body.
  • a simple alignment to all light-emitting diodes by only one adjustment is possible, especially when a lamp head with a base member, as described above, is used.
  • the lenses can be designed as plano-convex lenses, the planar surface of which forms in each case a region of the outside of the front element.
  • the lenses are designed as Biconvexlinsen, which may have lower radii of curvature at the same focal length and thus light-collecting effect and therefore are easier to produce.
  • the front element may be formed substantially only disc-shaped, it is pot-shaped in a preferred embodiment, wherein in the interior of the pot, the tubes and the circuit board with the Light emitting diodes are arranged. This results in a well-to-install unit with all optical components, in particular in the case that a base member is provided, a very easy to install unit with very secure and easy adjustment can be produced.
  • the front element and the base element or the printed circuit board particularly preferably have corresponding guide elements which act as anti-twist devices.
  • corresponding guide elements which act as anti-twist devices.
  • the base element can simply be inserted into the pot-shaped front element, whereupon the pot is closed by the printed circuit board at its edge.
  • the connection between the front element and the printed circuit board can in this case, for example, by gluing or, when using plastic parts and welded joints done, but it is preferred that the front element and the circuit board are connected to each other at the edge of the pot by a snap connection. This results in a particularly simple installation, in which also no high, possibly the circuit board or the light emitting diodes damaging temperatures, or harmful solvent vapors contained in adhesives may occur.
  • the front element with tubes and printed circuit board is preferably arranged in a sleeve-like head housing, whereby a simple assembly of the units is possible.
  • the sleeve-like head housing can be used by appropriate choice of material as a mechanical protection for the front element.
  • At least one, particularly preferably circumferential, lamp head gasket is provided between the front element and the head housing, which prevents ingress of moisture between the front element and the head housing.
  • a seal particularly preferably a circumferential seal, between the lamp head and the flashlight base body.
  • the LEDs are preferably arranged on a circle with equal angular intervals.
  • three LEDs are provided, as this results in a particularly favorable ratio between the achieved illumination and low power consumption. This is particularly important because at the same burn time low power consumption also allows the use of smaller batteries or accumulators and thus a lower weight.
  • a flashlight according to a preferred embodiment of the invention comprises a flashlight body 10 and a lamp head 12.
  • the flashlight body 10 is tubular, being terminated at one end. In the interior, a battery compartment 14 is formed for receiving batteries. Furthermore, in the flashlight body 10 power supply contacts provided, of which only the power supply contact 16 in Fig. 1 is visible. This power supply contact 16 is connected via a water-tight recessed in the flashlight body 10 switch 18 with a contact surface, not shown in the figures for a pole of an insertable into the battery compartment 12 battery.
  • the flashlight base body 10 has an external thread 20, which serves for fastening the lamp head 12.
  • an external thread 20 which serves for fastening the lamp head 12.
  • a circumferential held in a recess lamp head gasket 22 is provided.
  • the lamp head 12 is composed of a sleeve-shaped head housing 24, a front element 26, a base element 28 and a printed circuit board 30 with three white light emitting diodes, of which only the light emitting diodes 32a and 32b in FIG are shown.
  • the circuit board 30 is, as shown in Fig. 3 visible, circular, wherein the three light-emitting diodes, not visible in the figures, are arranged on a circle at equal angular intervals from each other. As shown in FIG. 2 for the light-emitting diodes 32a and 32b, the light emitting diodes 33a and 33b, respectively, are held on the printed circuit board 30 by their contact pins 34a and 34b.
  • the circuit board On the side facing away from the LEDs carrying the back side, the circuit board has a first ring-shaped contact surface 36 and a second likewise annular, concentrically arranged in the first contact surface 36 second contact surface 38.
  • contact surfaces 36 and 38 are not shown in the figures printed conductors and electronic components with the LEDs Connected so that the light emitting diodes on the contact surfaces 36 and 38 after contacting the power supply contacts in the flashlight base body 10 current from batteries inserted into the flashlight base body can be fed.
  • three recesses 40a, 40b and 40c are provided along the circumference of the circuit board 30 at equal angular intervals.
  • the front element 26 is cup-shaped and made of a transparent material, such as. made according to a transparent plastic. Integrated in its windshield 42 are three on a circle at equal angular intervals corresponding to the arrangement of the LEDs three converging lenses formed, of which in Fig. 2, only the converging lenses 44a and 44b are visible. The bulges of the collecting lenses are formed on the inside of the pot, so that the outwardly facing side of the windshield 42 is flat.
  • a circumferential groove 46 for receiving a seal is formed on the side wall of the front element 26.
  • the edge of the pot is thickened to a bead 50 extending into the interior of the pot, the shoulder 48 extending farther into the interior of the pot than the bead 50 and the distance between the shoulder 48 and the bead 50 corresponds to the thickness of the printed circuit board 30.
  • the inner diameter of the front element 26 in the region of the shoulder 48 and the bead 50 are selected so that the printed circuit board 30 with pressure between the bead 50 and shoulder 48 can be snapped.
  • the front member 26 On the inner edge of the front member 26 are further provided at equal angular intervals three guide tabs, of which in the figures only one guide tab 52 is visible and which are formed so that they engage in the corresponding recesses 40a, 40b and 40c along the circumference of the circuit board 30, when inserted into the front member 26.
  • the converging lenses and the guide lugs in the front element 26 and the recesses 40a, 40b and 40c and the LEDs in or on the circuit board 30 are aligned so that the LEDs are aligned with the converging lenses when the guide lugs in the recesses of the circuit board to grab.
  • the base element 28, which is held in the front element 26 by the printed circuit board snapped into the front element 30, has a paraboloid-like basic shape, and is seated with three support legs 54a, 54b and 54c arranged at equal angular intervals (compare FIGS. 2 and 5). on the circuit board 30.
  • three tubes 56a, 56b and 56c, which are arranged at equal angular intervals relative to one another, are also formed in the base element 28.
  • the tubes 56a, 56b and 56c and the base member 28 with the support legs 54a, 54b and 54c are integrally formed as a plastic injection molded part of a non-transparent plastic.
  • the line of contact between the base member 28 and the tubes 56a, 56b and 56c extends in the longitudinal direction of the tubes, they are held in the longitudinal direction of the base member 28.
  • the tubes 56a, 56b and 56c are formed substantially the same, so that they are described in more detail below using the example of the tube 56a.
  • the tube 56a has a cylindrical outer surface (see Figures 4 and 5) and contains a rotationally symmetrical interior.
  • the interior has at its end facing the light emitting diode 32a a cylindrical portion 58 for receiving the luminous element 33a of the light emitting diode 32a.
  • This is followed by a widening, frusto-conical portion 60 of the Tubusinnenraums. While the inner diameter of the cylindrical portion 58 corresponds to the outer diameter of the luminous element 33a of the light emitting diode 32a, the inner diameter of the tube at the end facing the front plate 42 and the lens 44a, respectively, is selected according to the diameter of the lens 44a.
  • the length of the support legs 54a, 54b and 54c is selected so that the light-emitting diode ends of the tubes 56a, 56b and 56c seated on pedestals 61a, 61b of the LEDs, whereby the filaments 33a, 33b of the LEDs are held in a defined position at the tube end.
  • the length of the tubes 56a, 56b and 56c is further selected so that they abut against the windshield 42, thereby ensuring, on the one hand, that the luminous bodies of the light-emitting diodes are at a defined distance from the converging lenses 44a, 44b, wherein the distance and focal length the converging lenses are selected, for example, so that the light of the LEDs is focused at a distance of about 5 m.
  • movement of the base element 28 between the front screen 42 and the printed circuit board 30 snapped into the front element 26 is prevented.
  • Light emitted by the light-emitting diodes (32a, 32b in FIG. 2) is guided by the tubes 56a, 56b and 56c onto the corresponding converging lenses (44a, 44b in FIG. 2) and focused by the same without scattering light from a light-emitting diode onto a light-emitting diode fall from a different LED associated conical lens and can be distracted by this.
  • the sleeve-shaped head housing 24 has at its front end a circumferential projection 62 and along the inner surface of three arranged at equal angular intervals latching lugs, of which in Fig. 1, only the locking lugs 64a and 64b are visible.
  • the unit of front element 26, base element 28 and printed circuit board 30 is inserted into the head housing 24, wherein it abuts with the front disk 42 on the projection 62 and is snapped with the edge facing away from the windshield 42 behind the locking lugs (see FIG. , As a result, it is very easily and securely held in the head housing 24.
  • a seal 66 is arranged, which prevents ingress of moisture through the gap between the front plate 42 and the projection 62 into the interior of the lamp head 12 and thus into the flashlight base body 10 ,
  • the head housing 24 further has an internal thread 68 with which the head housing 24 or the entire lamp head 12 can be screwed onto the external thread 20 of the flashlight base body 10.
  • the threaded end of the head housing 24 is formed so that the arranged at the end of the external thread 20 of the flashlight body 10 lamp head seal 22 with screwed lamp head closes the gap between the lamp head 12 and flashlight body 10 tight.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Air Bags (AREA)
  • Telephone Function (AREA)
  • Valve Device For Special Equipments (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
  • Thermotherapy And Cooling Therapy Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
EP02738106A 2001-06-29 2002-05-24 Taschenlampe Expired - Lifetime EP1392999B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10131686A DE10131686A1 (de) 2001-06-29 2001-06-29 Taschenlampe
DE10131686 2001-06-29
PCT/EP2002/005735 WO2003004932A1 (de) 2001-06-29 2002-05-24 Taschenlampe

Publications (2)

Publication Number Publication Date
EP1392999A1 EP1392999A1 (de) 2004-03-03
EP1392999B1 true EP1392999B1 (de) 2006-09-20

Family

ID=7690106

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02738106A Expired - Lifetime EP1392999B1 (de) 2001-06-29 2002-05-24 Taschenlampe

Country Status (11)

Country Link
US (1) US20040240201A1 (zh)
EP (1) EP1392999B1 (zh)
CN (1) CN100504152C (zh)
AT (1) ATE340332T1 (zh)
CA (1) CA2451202A1 (zh)
DE (2) DE10131686A1 (zh)
DK (1) DK1392999T3 (zh)
ES (1) ES2268046T3 (zh)
HK (1) HK1073685A1 (zh)
PT (1) PT1392999E (zh)
WO (1) WO2003004932A1 (zh)

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USD955033S1 (en) 2019-03-29 2022-06-14 Technomate Manufactory Limited Lens apparatus for use with flashlights
USD957722S1 (en) 2019-03-29 2022-07-12 Technomate Manufactory Limited Lens for flashlights
USD959729S1 (en) 2019-03-29 2022-08-02 Technomate Manufactory Limited Lens for flashlights
CN111637372B (zh) * 2020-06-02 2022-04-12 北京安富伟业消防安全检测有限公司 一种强光手电筒
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Also Published As

Publication number Publication date
EP1392999A1 (de) 2004-03-03
DK1392999T3 (da) 2006-10-23
WO2003004932A1 (de) 2003-01-16
CA2451202A1 (en) 2003-01-16
DE50208208D1 (de) 2006-11-02
CN1620577A (zh) 2005-05-25
HK1073685A1 (en) 2005-10-14
ATE340332T1 (de) 2006-10-15
PT1392999E (pt) 2006-11-30
US20040240201A1 (en) 2004-12-02
DE10131686A1 (de) 2003-01-16
ES2268046T3 (es) 2007-03-16
CN100504152C (zh) 2009-06-24

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