EP0921345A2 - Portable lamp, in particular pocket lamp - Google Patents

Abstract

The invention relates to a portable lamp, in particular a rod-shaped flashlight (20) with a single light bulb arranged in a hollow reflector with at least two separately switchable light filaments (filaments) (23, 24) by means of which different light cones and / or different radiation powers can be generated. <IMAGE>

Description

The invention relates to a portable lamp, in particular a rod-shaped flashlight with one arranged in the hollow reflector Radiation source.

According to the prior art are flashlights with an adjustment device to achieve different radiated Cone of light known in which the located in the lamp head Reflector with respect to the near the reflector focus arranged radiation source, a light bulb, longitudinally axial is movable. The shift can either be via a longitudinal axial guidance through a translatory Pushing movement or by a rotary movement in which the reflector foot according to the thread pitch through the Rotation can be moved to a certain extent. The one with this relative Distance shift between the reflector and the light bulb achievable effect is a change in the radiated Light cone shape. Most of the time is in the attack limited limit position a light beam of essentially parallel beams of light for remote illumination or radiation a cone of light with a large cone angle to wide-angle Close illumination reached. Has the same effect one if the reflector is rigidly arranged on the lamp housing and instead the relative position via a slide or the like the light bulb inside the reflector changed becomes. The change in the emitted light beam shape results itself in a known manner by reflecting off the light bulb outgoing rays on the reflector inner jacket. An essentially parallel light beam emission is obtained when the Light bulb located in the focal point of the concave mirror.

Flashlights of the type mentioned are mostly small Batteries supplied with voltage, the interior of the housing has appropriately trained battery receptacles. Alternatively hand lamps are also known, which have an external Power supply, e.g. via a car battery, the voltage of which is arranged in a car interior Can be tapped, which is usually used to hold a so-called cigarette lighter serves.

In addition, a flashlight is used in US Pat. No. 5,077,644 described the two separate light sources with two each assigned separate reflectors. The two lightbulbs as light sources can be turned on and off separately be, each by the shape of the reflectors different light cones can be emitted. Disadvantageous is the complex structure with two reflectors and the one made of them resulting fact that the light cone in different Directions are emitted. This results in a awkward handling of this flashlight.

The flashlight described in US 4,788,633 has in the cavity formed by a reflector on two light bulbs, of which an incandescent lamp shines the light on an upper partial reflector emits and the other, oppositely directed light bulb the light onto a separately arranged lower partial reflector emits. Due to the limited reflector area only an unsatisfactory light output is achieved.

US 4,783,735 describes a flashlight with a reflector and two arranged here in different locations Light bulbs, light-emitting diodes or laser diodes, through the shadow effects, as they occur with just one light bulb should be. The one used to achieve this goal Reflector and the transparent cover through which the Light emerges, however, have a complicated structure and, since the radiation is perpendicular to the longitudinal axis of the flashlight done, difficult to handle.

A disadvantage of all flashlights commercially available as well as those described above that the battery capacity is quickly exhausted and only takes this into account will that replacement batteries are carried.

It is an object of the present invention to handle the Flashlight and the cone of light to simplify and to specify technical means that are reliable, simple are constructed and can be produced without great effort.

It is also an object of the present invention that initially to further develop said portable lamp or flashlight, that battery-saving operation is possible.

This object is achieved by a lamp according to claim 1.

Two or more filaments or light-emitting glow bodies assume that these are in different locations in the hollow reflector must be arranged. This in turn means that the sent to a point of the reflector, of different Filaments of light coming in under different sizes Incidence angles hit, which also corresponds to the associated Angle of incidence equal reflection angles in different Dimension results. By choosing the location for the different Filaments can thus generate different cones of light. In the simplest application, this means that a filament is arranged in the focal point of the hollow reflector, so that the one emitted sideways and backwards and the hollow reflector reflected light to a substantially parallel Beam of light is reflected. The second existing Depending on the location, the filament will have a different light cone, e.g. a wider-angled, but shorter range of light produce. The separate switching of the filaments enables assigned to the user of the flashlight by actuation On / off switch or a switch a simple change the luminous characteristics of the lamp. This has compared to the previous one Flashlights available on the market have the advantage that relevant switches can be carried out with one hand complicated turning or moving is not necessary perfect.

By the measure that the light filament is different Radiant power is achieved that the portable Lamp or flashlight operated in an energy-saving manner if necessary is shaped, for example, by using only a 2 W light bulb an economy circuit is operated and the second light bulb with 6 W additionally or alternatively only switched on if there is an increased illumination of the to be irradiated Object area is required.

The advantages of the invention are even more serious Lamp with larger radiation powers of up to 60 W with a switchover to an economy circuit of 10 W. Die Burning time achievable with accumulators for a 60 W light bulb of approx. 30 min. by using the economy circuit (10 W) can be extended accordingly.

In addition to the advantage that this saves the battery can also result in environmentally friendly aspects. Batteries included rechargeable batteries, their lifespan is also limited, as a pollution of the environment Hazardous waste. The possible longer use a battery effectively counteracts the generation of waste. About that There are also other advantages:

Further developments of the invention are in the subclaims described.

So there are two filaments in a specific embodiment arranged in different levels related to a perpendicularly irradiated by all rays of the light cone Plane are arranged parallel to each other. In other words, the two filaments (or possibly more filaments) are related to the radiation longitudinal axis arranged "staggered". The focus existing light source is used to emit the essentially parallel (high) light used, the other filament for the generation of wide light cones, which due to the larger cone angle a correspondingly lower light density or have lighting intensity. Alternatively, it is of course possible, the filaments in a common Arrange level next to each other. Already with two filaments it is possible to either have the same or different radiation powers to use, each by switching can be used as needed. The invention however, also includes switch-on options in which all available Filaments or e.g. two of three filaments etc. turned on are.

The filaments are according to a further embodiment of the invention in a housing with chambers with different gas filling and / or different gas pressure arranged.

Other possible variations of the lamp according to the invention arise when there is at least one filament in the vicinity a shading body is formed. This shading body hides certain radiation directions in the direction of the Hollow reflector, so that depending on the convex shape of the inner reflector in connection with the shading body depending on switched on filament different lighting patterns can be generated. Under a shading body there are also such understood that on the side facing the filament as Reflector are formed. Depending on the shape of the reflector surface can thereby specifically the emitted light cone to be influenced.

Additional ones arranged in the hollow reflector interior can also be used further reflectors arranged and the existing radiation sources be assigned by this arrangement. Through the Using two or more filaments will make the possible variations with the additional filament or filaments and any associated reflectors, shading bodies etc. significantly enlarged. The lack of analog setting options the lamp according to the invention is thereby more than compensated.

According to a further embodiment of the invention, the lamp body has a ring surface on which only monochrome light lets through and which is arranged at the height of a filament. To the For example, this ring can be colored red or yellow, so that the lamp in question when only one filament is switched on, which is at the level of this ring, can be used as a warning lamp is. Possibly. can this be supported by the fact that the light bulb in question can also be switched on as a flashing light.

The hollow reflector can also be designed with parabolic mirrors.

In a further variant of the invention, the lamp has Lamp outer sheath at least two light-emitting diodes, which is expedient are arranged diametrically on the lamp housing. At three LEDs have an angular distance of 120 °. The LEDs fulfill the task of being switched off Lamp that has been put down in the dark when on LEDs are immediately recognizable. The LEDs can be used minimum current are operated, thus burden the lamp battery a portable lamp not or only insignificantly. A such a portable lamp is for hunters, fishermen or other people, who have to perform certain manipulations in the dark, for what the lamp should be put down, helpful.

It is also possible to completely or partially one of the filaments to be surrounded by a color filter, so that accordingly monochrome light is emitted. In the case of using Different light bulbs with one filament each can do this can be achieved by coloring the vitreous.

According to a further embodiment of the invention, all are present Filaments with the same internal or external Voltage source connected or connectable.

The flashlight is preferably designed as a flashlight, i.e. it has a rod-shaped housing and a lamp head. Between the flashlight has a concave neck in these parts, in which the necessary to operate the filament Switches are arranged. This is preferably the case pressure switches that are operated individually or together can. Accidental switching on when you put the Flashlight is effectively prevented because of the pressure switch lie protected in a "hollow".

Fig. 1 und 2

jeweils Seitenansichten von stabförmigen Taschenlampen mit Teilquerschnittsansichten der Glühbirnen,

Fig. 3

eine Seitenansicht einer Taschenlampe und eine Draufsicht mit drei Leuchtdioden,

Fig. 4 bis 13

jeweils unterschiedliche Birnentypen und

Fig. 14 und 15

Draufsichten auf Leuchtbirnen mit zwei bzw. drei Glühwendeln.

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

1 and 2

each side views of rod-shaped flashlights with partial cross-sectional views of the light bulbs,

Fig. 3

a side view of a flashlight and a top view with three light emitting diodes,

4 to 13

different pear types and

14 and 15

Top views of light bulbs with two or three filaments.

The flashlight shown in Figs. 1 to 3 each has a rod-shaped lamp body 20 with a lamp head 21 and a reflector 22, the front through a glass plate is covered. According to the flashlight Fig. 1 uses a light bulb, which two filaments 23 and 24, which are arranged in different planes, which are parallel to the front cover plate by is shone through all light cone bundles. The flashlight has an annular red colored, but light transparent Body on which is arranged approximately at the level of the filament 24 is, so that the radiation from the filament 24 laterally Light is filtered accordingly and emitted as red light becomes. In the case shown in FIG. 1, the filament is 24 arranged outside the reflector 22 so that its light only is emitted to the side through said ring 25.

The embodiment of Fig. 2 has a light bulb that also has two filaments 23 and 24, but are here both filaments within the interior of the reflector 22 in arranged on different levels, so that by the Filaments 23 and 24 emitted light on the inside of the reflector reflected at different angles of reflection which results in different beam cones. Located for example, the filament 24 in the focus of the Hollow reflector 22, the light emitted therefrom in broadcast substantially in parallel while that of the filament 23 emitted light toward an outside of the Flashlight lying focus is reflected. Beyond this focal point results in a cone of light with a wide Angle, but lower lighting intensity per unit area, so that that emitted from the filament 23 Light mainly for close-range illumination in a large area serves. The filaments 23 and 24 are via switches 18 and 19 separately switchable, i.e. it can either be one of the filaments alone or both filaments can be switched on if necessary become. For the purposes of the present invention, a Changeover switch provided for a temporarily limited changeover be, both for a one-time switching and for one Switch intermittent alternating light.

3 has on the lamp head outer jacket three LEDs 26, which can be switched to continuous operation. These light-emitting diodes enable immediate recognition of the Flashlight switched off in the dark.

4 to 15 are different filament arrangements and Lamp configurations each shown within a light bulb. Embodiments concerned can alternatively be in corresponding Also with several individual light bulbs only one helix can be realized, but results in this embodiment, the disadvantage that two There must be sockets inside the lamp.

The embodiment of FIG. 4 shows a light bulb with a Glass body 27, plug contacts 28 and a base 29. Die Filaments 30 and 31 are arranged "staggered" and have different power consumption, e.g. 10 W and 2 W.

The shown in a similarly constructed light bulb according to FIG. 5 Incandescent filaments 32 and 33, however, are parallel to each other arranged as seen from the top view of FIG. 14 can be seen.

6 has a total of three staggered arranged filaments 34, 35 and 36, the different power consumption have, namely a saving coil 34 that only with 1 W radiates, as well as other coils, whose power consumption is 6 W or 10 W and due to the different light cones be generated.

7 corresponds to the embodiment 4 with the proviso that the filaments 37 and 38th have different power consumption of 5 W and 10 W.

Instead of the plug connections of the light bulbs according to FIGS. 4 to 7 8 has ground contacts 42, in this The base must fall via a bayonet lock known in principle be locked. Have filaments 39 and 40 different power consumption of 6 W or 2 W, the Incandescent filament 40 additionally colored by a glass body 41 is covered. That emitted by the filament 40 Light thus appears when the filament is switched on corresponding to the filtering glass 41 monochrome.

9 has pin-shaped plug contacts, about the filaments 45 and 46 are supplied with voltages. In addition, there is a reflector between the filaments 46 and 45 44 arranged to the rear, i.e. towards the Base reflected by the filament 45 emitted light. The shape of the reflector 44 can be flat, curved, faceted or depending on the desired reflection pattern.

Fig. 10 shows a halogen lamp with plug contacts 47, the Lamp body 48 is filled with halogen gas.

11 corresponds essentially to the structure 8 with the proviso that here the "Color filter" 41 is omitted. Filaments 49 and 50 are closely spaced and have different Radiation absorption power.

Using the example of the light bulbs 51 according to FIG. 12 and the light bulb 13 is to clarify that the glass interior, in which the filaments are located, either in the form of a Single-chamber training with only one gas filling or as a two-chamber system 52, 53 formed with different gas fillings can be.

14 and 15 show top views of light bulbs with two filaments 32, 33 or three coils 54 to 56, which are here side by side are arranged, both arrangements in one plane as staggered in different levels are also possible.

The advantage of multi-filament light bulbs is that that if one filament fails, the lamp still over the second or third filament is functional. The different Incandescent filaments leave different light outputs blast, if necessary to adjust the power consumption to the need. The switch on the flashlights enables both a quasi point illumination and the generation a broad cone of light without, as in the case of the Embodiments known in the art, in cumbersome Way on the reflector head must be rotated or pushed.

Within the scope of the present invention, it goes without saying also variations of the above-described and illustrated embodiments possible in any way, also light bulbs with four or more light filaments of the same or different Power consumption, any arrangement within the reflector, with or without additional reflectors, so that depending on Desired light cone lighting patterns and types can be generated. The LEDs described or a colored light radiating ring allow use the flashlight as a signal lamp if necessary in an intermittent Business. Electronically controlled switching with alternative Remote and close-up illuminations are also from the invention detected.

A particular advantage results from the fact that the flashlight housing as a one-piece casting, e.g. also in cylindrical form, i.e. without a separate lamp head can. This significantly reduces production costs. In addition comes the convenient one-handed operation, which is lightning fast Switching from close-up to long-range illumination enabled.

Due to the switch, which can be actuated by means of a switch, an otherwise observed "wobble" of the light cone manually turning the lamp head according to the state of the Technique known designs avoided. By different Filters, reflectors, colored rings etc. can be infinite many lighting variations adapted to the needs realize. The use of filaments with low power consumption increases the service life in particular, since in corresponding Measure of electricity can be saved without having to To have to do without lighting. This also applies in particular in case of using light emitting diodes in the dark always show where the Flashlight is stored.

With the present invention, in particular, are also powerful Lamps that are colloquially referred to as "Light cannons" are called. Such lamps have one Radiant power of 55 W or 60 W. By the invention Possibility to switch to a second filament with a Power consumption of 10 W ensures that the lifespan the accumulators can be extended considerably because of the powerful The filament is only switched on for a short time if required , i.e. if the lighting is up to 3 km long is wanted. In normal cases, however, the economy circuit is sufficient which is a 10 W filament with a correspondingly lower one Headlight range is switched on.

Of course, the present invention also includes such Embodiments with 3 or more filaments, that is Switching options of 60 W radiation power from alternative 10 radiant power or 6 W radiant power, depending on what light intensity is desired.

Claims (13)

Portable lamp, in particular rod-shaped flashlight (20) with a radiation source arranged in a hollow reflector,
characterized,
that a single light bulb with at least two separately switchable light filaments (filaments) (23, 24; 30, 31; 32, 33; 34, 35, 36; 37, 38; 39, 40; 45, 46; 49, 50; 54, 55, 56) is used, by means of which different light cones and / or different radiation powers can be generated. Lamp according to claim 1, characterized in that at least two filaments arranged in different levels are related to one of all rays of the Light cone perpendicular to the plane parallel to each other are arranged. Lamp according to claim 1, characterized in that at least two filaments (32, 33) in a common plane are arranged, which refer to one of all light beams of the cone of light which is irradiated vertically is parallel. Lamp according to one of claims 1 to 3, characterized in that that the filaments in a housing with chambers (52, 53) with different gas filling and / or different gas pressure are arranged. Lamp according to one of claims 1 to 4, characterized in that that in the area of at least one filament a shading body (44) is formed. Lamp according to claim 5, characterized in that the Shading body (44) on the filament facing Side is designed as a reflection body. Lamp according to one of claims 1 to 6, characterized in that that in addition to the hollow reflector (22) and possibly the Shading body (44) or at least one more Reflector is arranged in the hollow reflector interior. Lamp according to claim 7, characterized in that the Lamp body has an annular surface (25) that only transmits monochrome light and that at the height of a filament (24) is arranged. Lamp according to one of claims 1 to 8, characterized in that the hollow reflector (22) has a parabolic shape. Lamp according to one of claims 1 to 9, characterized in that that at least two light-emitting diodes on the lamp outer jacket (26) are arranged. Lamp according to one of claims 1 to 10, characterized in that that at least one filament (40) from one Color filter (41) is completely or partially surrounded. Lamp according to one of claims 1 to 11, characterized in that that all filaments with the same internal or external voltage source are connected or connectable. Lamp according to one of claims 1 to 12, characterized through a rod-shaped housing and a lamp head, between which have a concave constriction in the at least two switches (18, 19) are arranged.

Images