EP1081425A2 - Flashlight - Google Patents

Abstract

A pocket lamp has a rod shaped lamp housing (10) and a lamp head (11) with a hollow reflector. A first light source is located in the focus of the reflector, such that the generated light is radiated in an axial direction. The light from the second source is radiated in a radial direction. All LEDs are fastened on a disc-shaped circuit board (21) with integrated voltage supply leads that are connected to the lamp socket for the first light source, in a detachable fashion. At least one further light emitting diode (LED) (19,20) acts as a second light source that can be switched separately from the first light source. At a distance from the circuit board is located a reflector (23,25) which reflects the light radiated from the LEDs in the axial direction, into radial directions.

Description

The invention relates to a flashlight with a rod-shaped Lamp housing and a lamp head with a hollow reflector, in whose focal point is a first light source, the generated light in the longitudinal axial direction of the lamp housing is emitted, and at least one further, from the first Light source separately switchable LED as a second Light source, whose light radially to the lamp head is emitted.

A flashlight is known from EP 0 921 345 A2 single light bulb arranged in a hollow reflector with at least has two separately switchable light filaments through which different cones of light and / or different radiant powers can be generated. The only light bulb is said to be over a socket can be fixed inside the lamp, which over corresponding electrical connections one with a switch creates a switchable connection to the voltage source. As a voltage source serve one or more batteries or rechargeable Accumulators in a rod-shaped housing part the flashlight are arranged.

Furthermore, it is proposed in EP 0 921 345 A2, on the lamp outer jacket Arrange at least two light emitting diodes, which is expedient are arranged diametrically on the lamp housing. At an angle of 120 ° is selected for three LEDs. This LEDs are intended to perform the task of being switched off Lamp that has been put down in the dark when on LEDs are immediately recognizable. About the type of Connection of the light emitting diode is in the mentioned publication nothing executed, which is why it can be assumed that this Diodes in the usual manner according to the prior art via separate supply lines with the voltage source of the flashlight are connected. Such a connection is manufacturing technology complex and bad or not even when needed to repair. If one or more of the LEDs fails it is therefore obvious for reasons of cost, to a repair to renounce.

It is an object of the present invention to provide a flashlight to create the type mentioned, in which the assembly of the Illumination is relieved.

This object is achieved by the flashlight according to claim 1 solved.

According to the invention, all light emitting diodes are on a common one Bracket with integrated power supply lines attached, the one with the lamp base for the first light source (possibly releasably), the first light source and the LEDs via a common voltage source, namely the Flashlight batteries are supplied. The named holder can either be via the base for the first light source pushed or over a corresponding thread between the Screwed base and the inner ring jacket of the holder are down to a final position at the appropriate contacts be short-circuited. However, it is also possible that To manufacture the holder as a removable unit so that it both supports for the diodes serving as the second light source as well as a carrier for the attachment of the first light source is, the holder via voltage supply lines integrated there and / or via electrical arranged on circuit boards Has contacts, which by means of the prior art known electronic switches the desired and Have the integrated lighting status switched in terms of circuitry.

The holder has one on its rear face sheet-metal, spring-mounted contact lug, which in principle according to the prior art, the electrical Makes contact with one of the battery poles.

According to a further embodiment of the invention, the Holder a board, which is preferably disc-shaped or is annular and perpendicular to the longitudinal axis the lamp housing is arranged. Are on this board several LEDs arranged.

According to a further embodiment of the invention, the first light source emitting "forward" also a light emitting diode used. With this configuration, it makes sense that the disc-shaped board the basis for one in the middle of it attached, the diode serving as a second light source in the The height of the plinth is the one on the front Has holes for insertion of the LED contacts. As far as the wire-shaped LED contacts are not already are sufficiently fixed due to a frictional connection these contacts in the area of the holes with corresponding Connection contacts are soldered. The base mentioned can if necessary, connected to the board via a screw connection his.

The advantage of light emitting diodes over conventional light bulbs consists on the one hand in a longer lifespan and on the other others in a significantly lower power requirement (for voltages currents of 5 to 20 mA flow between 1 V and 3.2 V).

The first and second light sources can be switched be switchable separately, preferably the existing switch an alternative power supply either from the first light source or the second light source switches or the existing LEDs (second Light source) on continuous light operation or intermittent Operation (flashing function) can be switched. To switch contacts to save, the switch is preferably two or multi-stage switch designed.

Will the flashlight function as a path or other long-range lighting is not required, the power supply from the light bulb or the one radiating forward LED switched to the radially emitting LEDs who recognize the flashlight from a distance to let. This glow effect can occur in poor visibility to be used at dusk or at night to be easily recognized by vehicle drivers. Possibly. can cyclists, especially mountain bikers, whose two-wheelers have none has its own lighting, the flashlight as a warning Use makeshift light. In a corresponding way, the Flashlight also as a route or warning mark in the event of a car breakdown Off.

The holder can preferably be a further longitudinally aligned Circuit board with switch contacts for the already mentioned Have changeover switch. In particular, the holder is made in one piece Part manufactured, which is releasably inserted in the lamp head or is plugged in. The holder in question then has one lower plastic part with cylindrical part-shaped outer surfaces, the correspondingly designed inner cylinder of the lamp housing or lamp head. Possibly. can in the area a tongue and groove guide is also provided for this lamp surface his. The lateral surfaces mentioned are only in the range of PCB pieces with switch contacts or existing resilient Pressure switches interrupted. At the front of the Holder is attached to a disc-shaped board, which two or more, preferably four to six, diodes attached there having. A centrally attached cylindrical protrudes over these diodes Base with corresponding holes for mounting of the contact wires of the diode, which are for the to be radiated forward Light is used.

Is preferably at a distance from the serving as a second light source Light emitting diodes arranged a reflector, the one of these LEDs essentially in the longitudinal axial direction of the Flashlight emitted light reflected in the radial direction, wherein the reflector is preferably an annular Has a conical jacket and a central sleeve, which is cylindrical Includes lamp base for the first light source and is pushed over this. The reflector creates the advantage that the wire-shaped light-emitting diode connections are not 90 ° must be angled so that the essentially under light beam emitted at a relatively small opening angle the light emitting diodes can be radiated radially outwards. Rather, according to the present invention, the diodes can their wire-shaped connections mounted perpendicular to the board be so that they extend in the longitudinal axial direction. This makes it possible to distance all the diodes from to arrange the lamp head inner jacket, so that during assembly or disassembly of the lamp head the risk of damage of the diodes, the diode connections and the electrical contacts is significantly minimized. The reflector essentially directs this in the longitudinal axial direction of the flashlight or the lamp head light emitted by the diodes in radial directions um, with the possibility of the reflector design can be used, the radially radiated outwards Enlarge cone of light. The construction of the reflector with an annular conical jacket and a central sleeve enables simple assembly or replacement. The sleeve, the inside diameter of which is necessary Match the outside diameter of the cylindrical base for the first light source corresponds to the reflector, whose Tapered casing inclined at 45 ° to the longitudinal axis of the lamp head thus the desired radial always reproducible Radiation of the light emitted by the diodes reached. The sleeve preferably projects over the annular conical jacket out and is supported on the face of the board mentioned from. The length of the measure with which the sleeve over the cone shell protrudes essentially by the space or the Distance determined by the diode heads to the board surface take in. In any case, the cone jacket should go to the light emitting diodes even be arranged at a certain distance.

The annular conical jacket preferably has at its end with the largest diameter a diameter measure that except for one allowable play corresponds to the inside diameter of the lamp head. This measure ensures an optimal reflection of the entire beam of light emitted and for an additional Fixation of the mentioned cone shell in the radial direction.

For the longitudinal axial fixation of the cone shell, insofar as it is not already at the back end of the hollow reflector for the protruding ring bulges can still support the first light source be provided on the inner surface of the lamp head which the cone sheath faces at the end with the largest Diameter supported on the face.

Alternatively, it is also possible to use the hollow reflector (for the first light source) and to form the reflector in one piece, however, such a reflector body towards the front the basically known parabolic shape in a cross-sectional view should have, while the rear end at least should be approximately frustoconical. In addition can also in this embodiment, the truncated cone outstanding sleeve, as described above, is provided his.

The lamp head has on its outer ring, preferably all around at the level of the annular conical surface of the reflector translucent areas, preferably faceted at least in part of the light-transparent ring Reflectors can be embedded. For example the lamp head has two light-transparent areas in adjacent areas Have rings, the first of which is crystal clear and the adjacent one is equipped with the mentioned facets and colored, e.g. is red.

In special cases, it is also possible to separate individual areas of the relevant lamp head ring transparent and under another To make the areas adjacent to it non-transparent or circular openings on the lamp head to be provided with light-transparent plastic covers are closed, which may have different colors can.

If a light bulb is used as the first light source, is followed by an embodiment of the invention proposed one of the second diodes serving as a high-performance diode. Surprisingly, it turned out that this was due to a high power diode emitted light for close illumination is not only sufficient, but also partly in the case of bright lighting sources, disturbing glare effects avoided by backscattered light. Through the radiation in essentially radial direction, that is perpendicular to the longitudinal axis of the flashlight or at an angle to the named longitudinal axis, which is greater than 70 ° with respect to the light cone axis, the flashlight can be carried horizontally, whatever the corresponds to the natural hand position when walking. By such High-performance diode is close to the user Illuminated floor surface, for which only a relatively low power of a few mA is required. If necessary, the Flashlight on the first light source, i.e. the bigger one Light emitting light bulb can be switched. This Light bulb can be used as a single or double filament light bulb of the type described in EP 0 921 345 A2. Becomes In this case, a larger illumination is required Switching from the first to the second filament a narrow, far shining cone of light with high light intensity or a weaker shining light cone with large cone angle generated become.

At least the switch is preferably for the high-power diode arranged diametrically opposite the high-performance diode, where for the sake of better handling this Switch is located near the lamp head on the lamp housing. With this measure, the second, downward radiating Light source by thumb pressure "from above" on the concerned switch located there on the lamp housing turned on without the user through the high-performance diode can be dazzled. The flashlight becomes comfortable in a more natural way Hand position with horizontal alignment of the longitudinal axis of the flashlight worn, preferably each of the to be operated The switch is on the top and can therefore be used for anything the switches possible switching from the first to the second Light source or various additional light functions is also possible in the dark without the risk of glare. Possibly. be a separate on / off switch and a changeover switch used with alternatively switched on the first or the second light source becomes. In contrast, the separate switch prevents with only a single switch, over which all functions must be set that all light sources accidentally be switched off or when changing from dark to light Rooms accidentally only on a dimly glowing one Light source is switched, although all light sources should be designed.

The radially radiating high-performance diode or the one in question Reflector area can be arranged so that the central Axis of the light cone emitted by the diode by 70 ° to Is inclined 80 ° with respect to the longitudinal axis of the flashlight. The Cone of light generated by the high-power diode thus shines with the flashlight aligned horizontally slightly forward inclined so that the full beam of light is completely in front of the user the flashlight.

Finally, according to a further embodiment of the invention an intermediate ring with two screw threads at the end is provided that allows the front part of the lamp head and / or unscrew the intermediate ring itself from the lamp housing, so that the holder with diodes on it as well as the reflector is accessible. Any damaged parts can easily removed and with new functional parts be replaced.

Fig. 1

eine Seitenansicht der erfindungsgemäßen Taschenlampe,

Fig. 2

eine Schnittansicht durch eine erste Ausführung des Lampenkopfes,

Fig. 3 und 4

jeweils vordere Draufsichten auf den Lampenkopf in unterschiedlichen Ausgestaltungen,

Fig. 5

eine Schnittansicht durch eine weitere Ausführungsform durch den Lampenkopf,

Fig. 6

eine Draufsicht auf einen Reflektor,

Fig. 7

eine Seitenansicht eines Halters als Träger für sämtliche vorhandenen Dioden sowie einen Reflektorkörper zusammen mit einer Teilansicht eines Lampengehäuses sowie einer Schnittansicht eines Lampenkopfes, in einer Explosionsdarstellung.

Embodiments of the invention are shown in the drawings. Show it

Fig. 1

a side view of the flashlight according to the invention,

Fig. 2

2 shows a sectional view through a first embodiment of the lamp head,

3 and 4

front plan views of the lamp head in different configurations,

Fig. 5

2 shows a sectional view through a further embodiment through the lamp head,

Fig. 6

a top view of a reflector,

Fig. 7

a side view of a holder as a carrier for all existing diodes and a reflector body together with a partial view of a lamp housing and a sectional view of a lamp head, in an exploded view.

The flashlight shown in Fig. 1 has a rod-shaped Lamp body 10, the inner cavity as a battery drawer owns that at the back end through a lid is lockable. Possibly. can also have a replacement diode in this cover be releasably clamped in a corresponding profile. The lamp head 11, which is a hollow body, is arranged on the front for the existing lighting. The flashlight has an on / off switch 12 and a switch 13, both on the lamp housing 10 near the lamp head 11 are arranged. Optional and as shown in Fig. 1 can also have a clip 14 for attaching the flashlight on a trouser belt and a ring eyelet 15 for attachment a wrist strap 16 may be provided. The lamp head has a non-transparent, crystal-clear ring 17 and adjacent transparent light Rings 18 that have a roughened surface or therein have embedded reflectors, such as as Indirect lighting lamps on two-wheelers are mandatory are. Instead of the existing three ring areas 17 and 18 can also be a uniformly red colored, light transparent Intermediate ring can be provided through which the diodes as second light source can emit the light.

As can be seen in detail in Fig. 2, all LEDs are 24 fixed on a ring-shaped plate 25, the power supply lines also integrated on the back owns. This circuit board can be detached with a lamp base 19 connected to the first light source, namely a single filament or Two-filament light bulb 20 carries. This light bulb 20 protrudes through a rear central opening of a reflector 21 in the Reflector interior, so that the filament 22 approximately in Focal point of the hollow reflector 21 is. To the front is to recognize a transparent cover 23 (front window). Both the light emitting diodes 24 and the incandescent lamp 20 are via contacts or current leads, not shown, with the Flashlight voltage source (battery) connected switchable.

According to the arrangement shown in Fig. 2 can just two diametrically opposed LEDs or, 3, three LEDs 24 are used be at an angular distance of 120 ° to the neighboring Light emitting diode are arranged.

Fig. 4 shows a flashlight with six light-emitting diodes 24. Each the light emitting diode shines preferably out of plastic existing light-transparent ring 18 radially outwards. The The front part of the flashlight can be turned by turning the ring 26 be removed that both the bulb 20 or Board 25 deducted with appropriate backing or can be unscrewed. In this way, one is easy replacement guaranteed.

While in the embodiment shown in FIGS. 2 to 4 the wire-shaped light-emitting diode connections are angled by 90 ° need to be essentially under a relative small beam angle emitted light cone of the LEDs 5 and 6 show radially outwards an alternative embodiment in which the diodes 27 with their wire-shaped connections mounted perpendicular to the board 25 be so that they are in the axial direction extend. This makes it possible to enlarge all diodes To arrange distance from the lamp head inner jacket, so that at assembly or disassembly of the lamp head the risk of Damage to the diodes, the diode connections and the electrical Contacts is significantly minimized. The cone of light LEDs 25 meet an annular cone jacket 28, from where it is deflected in the radial direction (see arrows 29) become. The annular cone jacket 28 is part of the reflector, who also has a central sleeve 30 which the includes cylindrical lamp base and releasable about this is pushed. The sleeve protrudes over the annular cone jacket 28 and is supported on the face side on the board 25 from. The cone jacket has one at its upper end (largest) diameter, the inside diameter of the lamp head corresponds to a permissible game. Possibly. can he Cone jacket at its upper end with the largest diameter on the end of a projecting annular bead, not shown of the lamp head inner jacket.

Fig. 7 shows a further embodiment of the inventive Flashlight, in which the front part of the lamp housing 10 has an external thread 31, via which the lamp head 11 with its internal thread 32 can be screwed. The front lamp head part 33 can optionally also be removed from the (intermediate) ring 18, which is completely or partially transparent, can be unscrewed his. The holder 34 shown has a circuit board 25, on which both the diodes 27 already described (see Fig. 5) and the first light source are attached here is designed as a light emitting diode 35 radiating towards the front. The Reflector 36 has the two wire-shaped for receiving Connections of the LED 35 corresponding holes. The Reflector 36 is on its conical surface, which faces the diodes 27 is, as well as in its surface facing the diode 35 designed as a reflector. The holder 34 has next to the board 25 still another, associated circuit board 37, which has different contact points, the multiple switch 13 are arranged opposite one another. The holder is at least partially cylindrical in shape on its periphery 38 trained so that he fits snugly into the upper part the cavity of the lamp housing 10 can be inserted.

In the context of the present invention, it is also possible for to use one of the diodes 24 or 27 a high-performance diode, in the area of a crystal clear transparent part of the Ring 17 (in the assembled state of the lamp) arranged and the light is radial, but under an oblique after emits a cone of light at the front.

Claims (13)

Flashlight with a lamp head (11), in which a hollow reflector and a first light source (20, 35) arranged in its focal point are fixed, which emits the light produced in a bundled form in the longitudinal axial direction of the lamp housing (10), and with at least one further one light-emitting diode (24, 27) which can be switched separately from the first light source as a second light source, the light of which is emitted in the radial direction (24) to the lamp head (11),
characterized,
that all light emitting diodes (24, 27) are fastened on a common holder (25, 34) with integrated voltage supply lines, which is connected to the lamp base for the first light source (20, 35), the first light source (20, 35) and the LEDs (24, 27) are supplied via a common voltage source. Flashlight according to claim 1, characterized in that the holder is a circuit board (25), preferably a disk-shaped one or has an annular disk-shaped circuit board arranged perpendicular to the longitudinal axis of the lamp housing (10) and on which several light emitting diodes (24, 27) are arranged are. Flashlight according to claim 1 or 2, characterized in that the first light source is also a light emitting diode (35) is. Flashlight according to claim 3, characterized in that the preferably disc-shaped board (25) the base for a centrally attached on it, which as a second light source serving diodes (27) outstanding in height The base is the holes arranged on the face for insertion which has light emitting diode contact wires. Flashlight according to one of claims 2 to 4, characterized characterized in that serving as the second light source LEDs (24, 27) by means of a switch (13) switchable separately from the first light source (20, 35) are, the switch (13) preferably an alternative Power supply to either the first light source (20, 35) or the second light source (24, 27) switches and / or the LEDs (24, 27) over this Switch (13) to continuous light mode or an intermittent Operation (flashing function) can be switched, whereby the changeover switch (13) preferably as two or more stages Switch is formed. Flashlight according to claim 5, characterized in that the holder (34) has a further longitudinally aligned board (37) with switch contacts for the changeover switch (13). Flashlight according to one of claims 1 to 6, characterized characterized in that the holder (34) as a one-piece part releasably inserted in the lamp head (11) or in the lamp housing (10) is. Flashlight according to one of claims 1 to 7, characterized characterized in that at a distance from the second light source serving light emitting diodes (27) a reflector (28) is arranged, which of these LEDs (27) in essentially in the longitudinal axial direction of the flashlight radiated light reflected in radial directions (29), wherein the reflector (28) is preferably an annular one Tapered casing and a cylindrical sleeve (30), the the cylindrical lamp base for the first light source (20) includes and is pushed over this. Flashlight according to claim 8, characterized in that the sleeve (30) protrudes beyond the annular conical jacket (28) and is supported on the face of the board (25) and / or that the annular conical jacket (28) on its End with the largest diameter one diameter owns the inner diameter except for a permissible clearance corresponds to the lamp head (11). Flashlight according to one of claims 8 or 9, characterized characterized in that the cone jacket (28) at its end with the largest diameter on the front of a protruding one Ring bulge of the inner shell of the lamp head (11) is applied, preferably the hollow reflector and the Reflector are made in one piece (36). Flashlight according to one of claims 1 to 6, characterized characterized in that the lamp head (11) on its outer ring shell, preferably all around at the level of the annular Cone jacket (28) of the reflector at least translucent owns fully trained areas is designed to be translucent, preferably at least in part of the light-transparent ring faceted reflectors are embedded. Flashlight according to one of claims 1 to 11, characterized characterized in that at least one of the second light sources serving light-emitting diodes is a high-performance diode, whose light cone is essentially in the radial direction is emitted. Flashlight according to one of claims 1 to 12, characterized characterized in that at the level of the second light source serving diodes (24, 27) arranged, at least partially light-transparent ring (18) on both of them Is equipped with a screw thread and thus is designed as a releasable intermediate ring.

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