EP2087386A1 - Illumination apparatus - Google Patents

Abstract

The invention provides an illumination apparatus, preferably a reading lamp, which firstly has a compact design and secondly ensures flexible illumination of objects, in the case of which, in order to ensure a sufficiently high illuminance, high-power light sources can be used, and preferably comprises a light source (10) and a light-guiding element (20) which can be pivoted and/or tipped about a pivoting/tipping point (28) and has at least one light-guiding axis and at least one light input face (23) and a light output face, wherein the light-guiding element (20) is preferably arranged axially displaceably such that a general-diffuse region can be provided between the light source (10) and the light input face (23).

Description

 lighting device

The invention relates to a lighting device, preferably a reading lamp, which has a light source with preferably at least one light emitting diode and a light guide for illuminating an object.

Are known mobile light sources from the dental field, in which a light source, such as an LED lighting unit, is firmly connected to a flexible or rigid optical fiber. Such light sources are u.a. used for curing dental fillings.

For example, WO 01/19280 A1 describes

An irradiation apparatus including a light-emitting unit and a light-receiving unit having an entrance opening, the light-emitting unit comprising a plurality of light-emitting elements whose rays emitting in a light beam directly irradiate the entrance openings.

US 2004/0043351 A1 describes a similar unit in which a lens element is provided for better focusing.

From US 5290169 a similar unit is known in which u.a. a rigid light guide is provided, which has a concave geometry as the light entry surface.

The object of the invention is to provide a lighting device, on the one hand is compact and on the other hand ensures a flexible illumination of objects within defined limits. In order to ensure a sufficiently high illuminance, high-performance light sources should be usable.

The object of the invention is achieved by a lighting device which incorporates the features mentioned in the introduction and / or the following features. These features also include preferred embodiments. In the following, the symbol indicates particular advantages of the described embodiment.

In a preferred embodiment of the illumination device according to the invention, the light from a light source (10) is coupled into a light coupling surface (23) of a light guide element (20) having a light guide axis (22) and by means of the light guide element through a light output surface (26) to be illuminated Surface guided.

The light incoupling surface describes the end of the light guide element, via which the light enters the light guide. The light output surface describes the end of the light guide, over which the light exits the light guide. If the light-guiding element is provided, for example, by fibers, the light-incoupling surface and the light-outcoupling surface are defined by the respective end of the fibers.

A free-jet area may exist between the light source and the light incoupling area, such that the light source may optionally be arranged away from the light-incoupling area, so that there is a gap between Both usually an air gap is located. A free-jet region is also described in that the light-incoupling surface of the light-guiding element does not have to rest directly on the light source but can be spaced apart from it. For example, the light can be directed to the light-incoupling surface of the light-guiding element via an optical component, for example a lens. The optical component would be part of the free jet area.

The light-guiding element is pivotable about a pivot-tilt point (28) and / or tiltable arranged so that a user of the lighting device can direct the light to those places where he wants a lighting. As a pivoting movement while the lateral pivoting is referred to, for example, a movement to the left or to the right or the other way round, and as tilting is called a pitching motion, ie a movement from top to bottom or vice versa. These two degrees of freedom inevitably result in a third adjustment direction, which can be referred to as "rotation". Thus, the movement of the light guide can also be described by a pivoting movement and a rotational movement.

By deflecting the light originating from the light source by means of the light-guiding element, it is possible to design the lighting device in a particularly compact manner. If the light source were used directly for lighting, means for cooling the light source would also be necessary, especially when using high-power light sources in or on it, which would thus also have to be provided in the immediate vicinity of the lighting location. In particular known from aircraft LED reading lamps would mean that the Lighting head, in which the LEDs are integrated, would have to be correspondingly large. However, the use of a light guide allows separation of the exit location of the illuminating light from the light source itself, which may be located near or directly to a preferably passive heat sink.

The pivoting / tilting point (28) assigned to the light guiding element can preferably be arranged at the intersection of the light guiding axis (22) and the light coupling surface (23), which has advantages for the light coupling with regard to high luminous efficacy and a low dependence of the light losses on the pan / tilt angle brings the light guide with it.

The light-guiding element is preferably rotatably mounted about its light-guiding axis. As a result, the user, both by tilting and by twisting the light to the places to which he wants it, especially when the light guide obliquely to a

Main section of the light guide axis emitted. For this purpose, the light guide may have two legs, a longer and a shorter, which are connected to each other but tilted relative to each other. That in the longer leg, thus in the main section of the

Light guiding element guided light is also passed through the transition into the tilted arranged shorter leg in the tilted direction of the shorter leg.

The pan / tilt angle is less than 40 °, preferably less than 30 °. The light guide element (20) is rotatably mounted around the light guide axis (22). The light-guiding element (20) is preferably mounted so as to be displaceable axially relative to the light source (10), the light-guiding axis (22) of one limb (21) of the light-guiding element (20) or the light-guiding element (20) being connected to the beam axis (13) of the light source ( 10) lie on each other. In this way, the lighting device (1) can be retracted and designed to save space, which brings with it safety advantages for many applications. In the extended state, the free jet area is the largest, while in the retracted state, only a reduced, in particular minimum, distance exists. For example, a contact between the Lichtleiteinkoppelflache and the light source exist. In this latter case, the free-jet area is no longer relevant since the light in this embodiment is usually switched off. In addition to this additional Einstellmoglichkeit the axial displaceability of the light guide has the advantage that the lighting device in the retracted state, even when used, can be made very compact and space-saving.

Particularly preferably, the light guide axis (22) of the light guide element (20) or relative to the beam axis (13) of the light source (10) is aligned coaxially with each other. As a result, the highest beam intensities of the transmitted light can be achieved.

The light guide (20) particularly preferably consists of a transparent plastic material (for example PMMA or polycarbonate) or glass, for example of a highly transparent borosilicate glass (eg DURAN ^®.) The light-guiding element (20) is constructed in a particularly preferred embodiment of a plurality of fibers, in particular of a transparent plastic or of glass fibers.

The light guide element (20) may be straight, i. it has only a single light guide axis (22).

However, the light-guiding element (20) can also be formed from flexible optical fibers, for example one or more glass-fiber bundles or one or more bundles of plastic fibers.

Fiber rods are particularly preferably used from a glass having a N _A of about 0.5. With this numerical aperture acceptance angle of about 30 ° are possible, ie the pan / tilt angle can be a maximum of about 30 °, without the light output decreases to unacceptable levels.

The fiber rods are known to consist of a plurality of optical fibers of a core glass, each of which is surrounded by a jacket made of glass, which generally has a smaller refractive index than the core glass.

Also usable are fiber rods which are formed of a plurality of optical fibers of a core glass, which are not individually covered by a sheath, but in which the sheath envelops the entire fiber rod. Mixed forms of these two described embodiments can also be used with preference.

In a further particularly preferred embodiment, in the lighting device according to the invention Fiber rod used as a light guide having an N _A of about 1. This is achieved by using special types of glass in the fiber rod and allows acceptance angles of about 90 °, which allows pan / tilt angles of up to almost 90 °.

Particular preference is given to using fiber rods with optical fibers with the cladding glass enveloping the core in each case, the fiber rod additionally having a cladding enclosing the rod with its lateral surfaces. This outer coat can be colorless, but also dyed for certain applications. When using the colorless outer shell this can additionally increase the light output, as this ensures that in addition from the optical fibers vagabonding light can be directed to the illumination. This sheath line can advantageously contribute to an increase in the acceptance angle for light-guiding elements, preferably in the case of light-guiding elements whose N _{A is} not equal to 1.

If, instead of a fiber rod, a light guide element consisting of one part is used, for example a solid glass rod, this can contribute to the homogenization of the light profile originating from the light source, since a mixture of the light can also take place in particular by multiple reflection on the walls of the light guide element.

Instead of straight light-guiding elements, angled light-guiding elements can also be used with preference. In this case, the light guide element (20) has at least one bending region (27) such that the light guide element (20) has a limb (21) with a light guide axis (22) and a light coupling surface (23) perpendicular to the light guide Lichtleitachse (22) is arranged, and a further leg (24) having a Lichtleitachse (25) and a Lichtauskoppelfläche (26), wherein the Lichtleitachse (22) and Lichtleitachse (25) form a bending or tilt angle relative to each other, which between 0 ° and 90 °, preferably between 20 ° and 70 °. As a result, a flexible illumination of, for example, filing tables, work surfaces is made possible and the illumination cone (29) can be individually adapted to the respective needs.

Combinations of flexible and rigid elements are possible as a light guide or light guide.

Due to the tilting of the light-guiding element, reflections of the light emitted by the light source can occur at the light-entry surface. The reflected light is lost to the lighting and can thus reduce the light output of the lighting device. Therefore, the light entry surface of the light guide element is preferably polished and / or anti-reflective, e.g. by means of an antireflection coating. In a further preferred embodiment, the housing in which the light-guiding element and the light source are mounted and / or at least part of the housing is / are mirrored between the light source and the light-entry surface of the light-guiding element. Particularly preferably, the housing of the lighting device is mirrored in the free-jet area.

Alternatively or additionally, a light material color for the corresponding part of the housing can be used. The light guide element (20) preferably has a light emission surface (26) which forms an angle of not equal to 90 ° with respect to the light guide axis (22) of the light guide element (20) or with respect to the light guide axis (25) of the one limb (24) of the light guide element. whereby an oblique emission direction of the illumination cone is made possible.

Other angles of the light output surface are of course also possible. All angles between 10 ° and 110 ° are advantageously feasible when using fiber optic components. The diameter of a fiber optic light-conducting element is particularly preferably between 5 and 8 mm. Larger diameters are also possible depending on the application, if less demands are placed on the compactness for the corresponding application. Of course, smaller diameters can also be realized for corresponding applications.

Particular preference is given to using one or a plurality of white-light LEDs as the light source (10).

The light output surface (26) is preferably polished or slightly frosted, with a frosted surface for more uniform illumination and a polished surface for spot lighting is more advantageous.

The light incoupling surface (23) can be designed flat, convex or concave, wherein when the surface is polished and preferably non-reflective, there is a smaller angle dependence with respect to the light coupling, in particular with concave geometry. In a further preferred embodiment, the light element has side-emitting properties. This means it can decouple light from its Rare Walls. This can be achieved, inter alia, by roughening the outer wall of the light-guiding element and / or providing it with scattering centers, so that light can be coupled out substantially perpendicularly to the light-guiding axis.

The light source (10) preferably has a focusing element (12) with which its light beams can be focused on a focal plane (14). Preferably, the focal plane (14) in the Lichteinkoppelflache (23) of the light guide element (20) or if the Lichteinkoppelflache the light guide is convex or concave in a real or virtual, defined by the Lichteinkoppelflache relative to the Lichtleitachse focal point. As a result, a very effective light coupling can be realized.

The printed circuit board (15) of the light source particularly preferably has control electronics (16) for the light-emitting diode (11) which, for example, keeps the current constant, thereby ensuring, in a compact construction, overload protection of the light-emitting diode and permanently uniform brightness.

In addition, on the board (15) still be provided electronics with which the light source (10) can be dimmed steplessly or in stages, whereby the

Power consumption can be reduced, for example, at rest, also let the lighting intensity to the wishes of the user adapt). The circuit board (15) preferably also has a switch (17), for example in the form of a microswitch, with which the light source (10) can be switched on / off and / or dimmed in one or more stages. The board is connected via a supply line, additional board or via a receiving socket with the switch.

An actuating surface for the mechanical actuation of a switch can be arranged or integrally formed on the light element or on the border of the light element (20).

Alternatively, a permanent magnet can be mounted, which serves to operate a non-contact switch (17).

The switch (17), which is mounted on the board can be operated mechanically or without contact. The touch-free operation of the switch (17) can be understood as an optical, inductive or capacitive actuation of the switch.

The switch (17) is preferably connected with axial displacement of the light-guiding element, in particular after the pan-tilt movement of the light-guiding element (20) and / or during the rotational movement about the light-guiding axis of the light-guiding element (20) are completed upon its return.

A reflection element can be arranged on the light element (20) or on the border of the light element. The reflection element may be formed as a mirror or as a foil. An alternative would be to apply a contrasting color. In conjunction with three-color RGB LEDs, a color change is also possible.

When using white light LEDs, it is known that the LEDs also have a more or less different color temperature due to their production. Therefore, either electronic circuits are used to achieve a certain color temperature, or LEDs are selected from a so-called bin, which then have a fairly similar color temperature. By appropriate choice of materials (e.g., glasses) of the light guide having corresponding spectral transmission profiles, it is possible to adjust the color temperature of the LEDs. The glass acts specifically as a color filter. If, for example, a glass rod with properties homogenizing the beam profile is used as the light guide, which causes transmission of the transmitted light in transmission, a cluster of white light LEDs can be used as the light source, which usually has a too cold color temperature, and the lighting location nevertheless becomes reached a neutral color temperature.

The heat sink (40) may be part of a housing attachment for the lighting device (1). If the lighting device is integrated, for example, in a seat, a thermally conductive frame of the seat, which is usually present anyway, serve as a passive heat sink and thus make an active cooling of the light sources or large-scale passive heat sink superfluous, with passive cooling being understood as cooling, which does not require fans or Peltier elements or other energy consuming elements. This contributes to the compactness and to Low noise of the lighting device at.

The light guide element (20) of the illumination device (1) preferably has a rest position in the switched-off state of the light source (10) and a working position in the switched-on state, which is displaced along the beam axis (13) of the light source (10), whereby the integration in one Push-push housing is advantageously possible.

The ratio of the surface of the Lichtemkoppelflache (23) to the surface of the Lichtauskoppelflache (26) of the light guide (20) may not be equal to 1, whereby an adjustment of the numerical aperture of the light guide (20) to the radiation characteristic of the light source (10) is made possible.

The Lichtauskoppelflache (26) may have any contour, wherein the Lichtemkoppelflache (23) is preferably circular.

In one embodiment, the illumination device according to the invention comprises a displaceable carriage for holding and, preferably, axially, driving the light-conducting element. The carriage can also be referred to as a push element. The light guide is attached to the carriage. In particular, the light-guiding element is arranged at least partially within the carriage. In detail, the light-guiding element can be inclined, in particular curved or angled, within the carriage to the housing axis, so that the light can escape laterally through the light coupling-out surface.

The carriage has at least partially the shape of a pin, at its lower end at least one Fin, preferably two fins, is arranged to guide the carriage or are. The guide is in a ball and / or in a housing, which will be described below. As a fin, a "back fin-like" or "keel-like" extension for guiding and / or stabilizing the carriage, in particular in the housing and / or the ball, referred to.

In one embodiment, the lighting device also has a housing for receiving the ball, which will be described below, and / or the carriage.

The light-guiding axis of the light-guiding element is arranged at least in sections parallel to the housing axis.

The housing is preferably formed in one piece. It has in particular a substantially triangular

Cross-section .

Furthermore, in another embodiment, the lighting device may comprise a ball for supporting the carriage. A ball is a body for recording, for

Guide and / or for storing the light-guiding element and / or the carriage. The ball can also be referred to as a ball element or bearing element. In one embodiment, the ball has at least partially the shape of a spherical shape. Preferably, the ball is formed as a ball without the respective spherical caps. The light guide and / or the carriage is or are axially movable in the ball and / or arranged to be movable in the housing. In this case, the light guide and / or the slide extends through the ball.

The ball is mounted on and / or slidably movable in the housing. In one embodiment, the ball is mounted on, preferably four, ribs which are arranged at least in sections inside the housing. The preferably 2-dimensional, control cam defined and which is preferably arranged on an outer side of the carriage. The engagement element is slidably running in the groove. The engagement element is latched in at least two positions in the control cam, which in particular define a retractable and an extended position of the light guide.

In one embodiment, the control cam is designed essentially as a heart curve, which is extended in particular downwards and / or upwards through at least one, preferably essentially linear, extension. The term heart curve refers to a control curve that is essentially heart-shaped. The tip of the heart curve points towards

Light input surface and thus to the bottom of the housing. The tip of the heart curve defines the extended position of the light guide. The inwardly converging curves serve in their point of contact as a detent recess for the carriage connected via the engagement element in its retracted position. The point of contact of the heart curve thus defines the recessed position of the light-guiding element.

The aforementioned curves may be arcuate or angular. In one embodiment, the heart is at least partially or completely constructed of linear sections, so that the heart is at least partially or completely formed by corners. The heart is at least partially polygonal shaped. Preferably, the heart here has 5 or 6 corners. In order to allow the engagement element to rotate in the control curve in the orientation corresponding to the sinking or extension of the light-guiding element, the heart is not formed mirror-symmetrically but in particular has a two-dimensional Zwangssteuerkυrve.

The light guide and / or the carriage is against the pressure of a spring, for example a tension spring, in particular axially, movable or displaceable. In one embodiment, the spring is attached to the ball at an upper side and to the light guide member and / or the carriage at a lower side so that the ball and the light guide member and / or the carriage are biased against each other. The upper side of the spring is attached to a first projection which is located in the inside of the ball, and the lower side of the spring is attached to a second projection which is located on the outside of the carriage, preferably detachably. Of the

Carriage has in its outer side for guiding the spring a kind of groove, a recess or a notch, in which the spring is positioned and guided safely.

Preferably, the control cam and the spring are arranged on the same side of the carriage. The control cam and the spring are arranged at an average distance of less than 10 mm, preferably smaller than 5 mm, to each other. By this adjacent arrangement a significantly reduced, in particular minimal, clamping of the components is achieved.

The spring and the combination of engagement element and control cam cooperate such that the light guide and / or the carriage in a retracted position and in an extended position is latched and limited in an extended position against a mechanical stop or are. The function of the fin is or includes, the individually adjusted position of the lighting when the slide is extended during the insertion movement, in particular for switching off), the provision of the mechanics, in particular the ball position in the nominal position to accomplish.

The function of the spatial return is arbitrarily in the sequence according to the operation and consists of the reset movement to the Z-axis through the at least one lateral guide rail. The Z axis is described in particular by the housing axis.

The resetting of the pivoting movements of the X- and Y-axis is carried out by a kind in a first approximation funnel-shaped guide surface. The X and Y axes are in particular perpendicular to the Z axis.

For this purpose, the movement of the fin is controlled by at least one guide surface arranged in the interior of the housing. Thus, the movement of the carriage and thereby also the light-guiding element is controlled. The lateral guide surface for the fin is provided by arranged on the inside of the housing guide rails. The guide rail is formed by two guide ribs or two elevations, such as burrs, and / or by a recess.

The guide ribs have for defined insertion of the fin in the guide rail, at least in the upper, ie facing away from the light incidence area, curved surfaces. The guide rail is preferably formed by the ribs, which provide the bearing surface for the ball in its upper region. The guide rail is widened in its upper part and narrowed in its lower part. The broadening allows for a simplified threading or insertion of the fin in the guide rail. On the other hand, this widening allows a rotation of the

Light guiding. In particular, the guide rail is formed by at least two sections, wherein the first upper section is widened and the second lower section is a, preferably uniform, groove. The shape of the guide rail can also be referred to as funnel-shaped. The fin is rotatable about the housing axis in the extended position of the light guide within a range of up to about +/- 15 °. The fin comes in its extended position in engagement with the arranged in the bottom of the ball recess. Thus, the ball is also rotated by a rotation of the carriage.

The fin is controlled during transfer of the light guide from its extended position to its recessed position by the guide rail so that the carriage is transferred from the released position through the constriction in a locked position. On the one hand, the light-guiding element, preferably the carriage, the ball and / or the housing cooperate in such a way that the

Light guide and / or the carriage is in the retracted position in a substantially locked and / or non-rotating position. The light guide and / or the carriage is not rotatable in the retracted or retracted position substantially.

This results in the advantage that in this position, for example, a mechanical switch can be operated defined and switching tolerances can be minimized. On the other hand, the light-guiding element, preferably the carriage, the ball and / or the housing also cooperate in such a way that the light-guiding element and / or the carriage is in the extended position in the released position. With a released position, a position is referred to, in which the light-guiding element and / or the carriage, within certain limits in three dimensions, in particular in the pivoting and rotating movement, is movable. Thus, in the switched-on state of the bulb that from the

Lichtauskoppelfläche radiate emerging light in different directions. This is achieved by a rotation of the light-guiding element and / or the carriage and by a tilting or pivoting of the light-guiding element and / or the carriage. Due to the arrangement in the ball thus the ball is moved.

The light guide and / or the carriage is in the extended position by a defined angle, preferably of up to +/- 15 °, about its own axis and / or the housing axis, rotatable. In addition, the light guiding element and / or the carriage in the extended position is or can be tilted or tilted about the pivot-tilting point described above. The light guide and / or the carriage is in this case preferably tiltable relative to the housing axis by an angle of up to +/- 20 °, a total of 40 °, and correspondingly also 3-dimensionally pivotable. In one embodiment, the upper side of the light-guiding element and / or the carriage, when the light-guiding element and / or the carriage is moved in the extended state, at least in sections, describes a spherical surface, in particular a spherical cap. As already stated above, in one embodiment the lighting device additionally has a damping device for carrying and / or steaming the movement of the light-guiding element and / or the carriage. The damping device is arranged on the opposite side of the carriage to the engagement element. The damping device is preferably arranged between the ball and the light-guiding element and / or slide. The damping element acts during extension, during retraction or both during extension and retraction of the light guide and / or the carriage.

The damping device interacts with the ball in such a way that a, preferably axial, movement of the light-guiding element and / or of the slide is damped. In this case, the damping device is arranged on the light-guiding element and / or the carriage, preferably fastened. The Dampfungseinπchtung is for this purpose in a recess or opening, which is introduced on an outer side of the carriage, positioned. This recess has a guide, which at least in sections has a survey and which cooperates with a recess which is introduced in the inside of the ball, so that a rotational movement of the carriage is reduced or suppressed in the ball.

This damping device is preferably a rotary steam generator. Preferably, the Dampfungseinrichtung is designed as a gear. The damping of the movement is in this case in particular due to the viscosity of a liquid in which the damping device moves in sections.

The damping element consists in an embodiment of at least one housing part with special External teeth, and a gear that is attached to the damped rotor shaft

The gear of the damping element meshes, preferably always, in the structuring, e.g. in the formation of a rack, which is arranged or formed on the inside of the ball.

The housing acts with a structuring, preferably formed as grooves, which in the inside of the

Is arranged carriage, together, so that the movement of the light-guiding element and / or the carriage is damped. At least one of the following variants is possible: a) If the damping element is not installed, the lamp works without damping, b) if damper housing is not rotatable, the damping element is effective during retraction and extension. c) if the damper housing blocked during extension, the damping element is effective only when extending, d) if the damper housing blocked during retraction, the damping element is effective only when retracting.

It can thus be provided that the damping element acts only during extension, only when retracting or both during retraction and extension of the light guide and / or the carriage.

As already stated, the illumination device has at least one optical component, preferably a lens, for guiding, steering and / or focusing the light from the light source onto the light coupling surface. The component is arranged both on the light guide axis and on the housing axis. The component is arranged inside the housing. The housing is equipped with fastening means on which the component, preferably replaceable, attached. Preferably, the holder, in particular the lens holder, is integrated in the housing. The component is positioned below the guide rail.

The switch or switching element, which is already described above, is arranged in a receiving pocket, which is fixed inside the housing. The switching element cooperates with at least one actuator of the carriage, for example formed in the form of a projection, which is arranged on the lower side of the carriage, so that a switching operation for activating or deactivating the lighting means can be triggered. The light element or the light source is preferably switched on in the extended position of the light-guiding element. By contrast, in the lowered position of the light-guiding element, it is preferably switched off. Said actuator can along an outer side of the receiving pocket, preferably non-contact, slide and thus trigger a switching operation. Furthermore, the projection of an outer side of the receiving pocket cooperates so that the projection on the receiving pocket, in particular in the retracted position of the light guide and / or the carriage come to rest and a rotational movement can be additionally limited. The actuator for triggering the switching operation is preferably arranged below the heart curve. In particular, the one side length of the carriage is extended relative to the other sides.

The light guide and / or the carriage is or are movable in the extended position in all three spatial directions. The entire freedom of movement of the light guide and / or the carriage in the extended position is when sinking or insertion returned to the housing in the central position and is in particular substantially suppressed. Thus, the light-guiding element and / or the slide can be retracted in the housing and / or the ball. In addition, the light guide and / or the

Slide on insertion into the recessed position in a position in which the axis of the carriage is located on the housing axis. The light guide and / or the carriage pivots or pivot during retraction or sinking in the said position.

Furthermore, the present invention comprises a lighting device with a destruction protection for a latching mechanism. This includes in particular the above-mentioned features of the invention. The lighting device comprises a, preferably rotatable, bearing element, in which a carriage, which carries a lighting element, preferably a light guide, is arranged, in particular axially displaceable, wherein on the displacement of a latching element in a control cam at least one locking position, in particular a latching position of the carriage is generated in the bearing element, so that in at least one direction of movement of the carriage in the bearing element, the movement of the carriage is limited by at least one stop such that the latching element is movable up to the contact position of the Einrastelementes on an outer wall of the control cam, but not beyond , The lighting element may in this case be arranged, for example, in the carriage.

In addition, in the context of the present invention: a destruction protection for a latching mechanism for a device, in particular a lighting device comprising a carriage and a preferably rotatable Bearing element in which the carriage, in particular a lighting element, preferably a light-conducting element, carries, in particular axially displaceable, wherein the displacement of a latching element in a control cam at least one locking position, in particular a latching position of the carriage is generated in the bearing element, so that in at least one direction of movement of the carriage in the bearing element, the movement of the carriage is limited by at least one stop such that the latching element is movable up to the contact position of the latching element on an outer wall of the control cam, but not beyond.

In one embodiment, the lighting device or the destruction protection is characterized in that the movement is limited so that it ends before the contact position of the latching element on the wall of the control cam.

In a further embodiment, the

Lighting device or the destruction protection characterized in that the control cam has at least one extension which is designed such that the latching element does not come to rest against the outer wall of the control cam in a movement to the stop.

The destruction protection may further include the features listed in the present specification.

The following uses are advantageously possible inter alia with the lighting device:

Use of the lighting device (1) as seat lighting, as reading light for aircraft seats, for Seats in rail vehicles and / or in motor vehicles, especially in cars or coaches, the compact design and high functionality is particularly attractive.

Use of the lighting device (1) as

Work lamp, which can be integrated in ceilings or walls.

Use of the lighting device (1) in furniture, in particular in kitchen furniture.

Use of the lighting device (1) as object lighting in showcases.

Use of the lighting device (1) as glare-free, possibly retractable instrument lighting in cars (for example in the cockpit, center console, roof console, as card reading lamp).

Use of the illumination device (1) as integrated microscope illumination, wherein the microscope stand can be used as a heat sink (40).

For this application in particular the advantage of the illumination device according to the invention comes to bear, that it can be made very compact. As a result, in particular effect lighting is possible in places that could not previously be considered with appropriate lighting effects. Since the interior now represents a major selling point, especially for aircraft, the lighting device according to the invention also has significant economic advantages over previously known lighting devices. The invention will be described in more detail below with reference to preferred embodiments and with reference to the accompanying schematic drawings.

Show here

FIG. 1 shows the plan view, shown only schematically, of an embodiment of a lighting device according to the invention,

FIG. 2 shows the side view of the illumination device according to the invention shown in FIG. 1,

3.a to 3.f an embodiment of the reading lamp in various positions in a sectional view,

FIGS. 4.a and 4.b show the embodiment with built-in light guide element shown in FIGS.

FIG. 5 shows the guide rail according to the invention,

Figures β.a and β.b an outer and an inner view of the ball for supporting the light-guiding element and

FIG. 7 shows the heart curve according to the invention.

Detailed description of preferred embodiments

In a first preferred embodiment according to the invention, which is shown only schematically in FIGS. 1 and 2 for the sake of clarity, the lighting device comprises a light source (10) and a pivotable about a pivot-tilt point (28) and / or tiltable light-guiding element (20), which has at least one light-guiding axis (22) and at least one light-coupling surface (23) and a light-outcoupling surface (26).

The light guide axis is that axis or direction of the light guide element (20), along which the main propagation direction of the guided light extends and which generally corresponds to the axis of symmetry of the light guide element (20).

The light-guiding element (20) is, preferably axially displaceable, arranged such that a free-jet region (9) can exist between the light source (10) and the light-coupling surface (23).

The pivot-tilt point (28) of the ^' pivot-tiltable mounted light-guiding element (20) is located at the intersection of the light guide axis (22) and the light input surface (23).

Furthermore, the light-guiding element (20) is rotatably mounted in addition to its pivotable tiltability about its light guide axis (22).

The swing-and-tilt angle in this preferred embodiment is less than 40 °, preferably less than 30 °.

In the preferred embodiment of the illumination device described here, the light-guiding element (20) is axially displaceable relative to the light source (10) in addition to its pivoting and tilting capability, preferably mounted so as to be displaceable parallel to its light-guiding axis. Preferably, the Lichtleitachse (22) of the light guide element (20) in a further embodiment relative to the beam axis (13) of the light source (10) arranged coaxially, this means that the lateral offset between the light propagation direction of the

Light source originating light with the substantially highest light intensity and the light guide axis is minimized.

The light guide (20) is preferably made of a transparent plastic or glass, preferably made of a highly transparent borosilicate glass and particularly preferably consists of DURAN ^®.

In an alternative embodiment, the light guide element (20) is rigid and composed of a plurality of fibers of a transparent plastic or glass fibers. In this case, the light-guiding element (20) can be constructed by rigidly interconnected or flexibly held optical fibers.

In yet another alternative embodiment, the light guide (20) is rigid and designed as internally mirrored hollow body, for example as a columnar hollow body with a round, elliptical or polygonal cross-section.

The light-guiding element (20) can either be designed to run straight or alternatively be provided with at least one bending or bending region (27), wherein the

Light guide (20) then includes a leg (21) having a Lichtleitachse (22) and a Lichteinkoppelflache (23) which is perpendicular or oblique to the Lichtleitachse (22), and a further leg (24) with a Lichtleitachse (25) and one Light outcoupling surface (26), wherein the Lichtleitachse (22) and Lichtleitachse (25) form an angle of greater than or equal to 0 ° and less than or equal to 90 °.

In a further embodiment, the light-guiding element (20) may consist of a combination of flexible optical fibers and rigid elements.

The light output surface (26) can be polished or slightly frosted and have a flat, convex or concave shape.

The surface of the light coupling surface (23) is preferably polished and provided with an antireflection coating.

In a further embodiment, the light-conducting element (20) can have side-emitting properties, in order to thereby provide adequate ambient lighting.

The light source (10), which is preferably a white light LED or comprises a combination of red, blue and green LEDs, may have a focusing element (12) with which the light beams can be focused.

Preferably, the light beams can be focused on a focus area (14) which is arranged in the light input surface (23) of the light guide element (20) or if the light input surface of the light guide is convex or concave, in a real or virtual, by the light input surface relative to Lichtleitachse defined focus. A real or virtual focal point is understood to mean that location from which light beams propagate substantially parallel to the light guide axis of the light guide element. As substantially parallel, deviations from the actual direction of the light guide axis of up to 20 °, preferably up to 10 ° and most preferably up to 5 ° are considered.

Through the spectral profile of the absorption of the material of the light-guiding element (20), a targeted adjustment of the color temperature of the light emitted by the lighting device is also effected.

Preferably, the white light LED is on a circuit board

(15) arranged, which has a control electronics (16) for the light emitting diode (11), which preferably keeps the current constant.

In an alternative embodiment, the

Control electronics (16) designed so that the white light LED or the LED's are dimmable steplessly or in stages with this.

For this purpose, in another embodiment, the board (15) has a switch (17) with which the light source (10) on / off and / or dimmable in one or more stages With the help of a supply line, additional board or a receiving socket, the switch be connected to the board.

A further preferred embodiment comprises a non-contact or non-contact-actuated switch (17). In this embodiment, a permanent magnet is attached to the light element or to the border of the light element (20). The permanent magnet is used for non-contact operation of the switch (17), which in this case can be designed, for example, as a reed contact or reed relay or can switch by means of the Hall effect.

In order to enable non-contact operation of the switch, the switch can detect optical signals by means of a light-emitting diode, for example detecting the absence of an optical signal as reflected signals or as a break in a light barrier.

In an alternative embodiment, the switch (17) also perform inductive or capacitive switching operations.

As an alternative to a reed contact, the switch (17) can also be actuated on the basis of the Hall effect.

In the preferred embodiment, the switch (17) is actuated upon axial displacement of the light-guiding element and / or during the pan-tilt movement of the light-guiding element (20) and / or during a rotational movement about the light-guiding axis of the light-guiding element (20).

Preferably, in the case of an optically switching non-contact switch, a reflection element is arranged on the light element (20) or on the border of the light element. The reflection element can as a mirror or be designed as a film. The formation of a reflection elements can also be achieved by applying a contrasting color.

The lighting device comprises a heat sink

(40), which is part of at least one housing attachment for the lighting device.

With the thermal coupling (18) to the fixed heat sink (40) can be ensured that, for example, LEDs can be used with comparatively high light output. An active cooling of the light source (10) and the control electronics (16) is therefore not required in this embodiment.

In a further preferred embodiment, the light-guiding element (20) of the illumination device (1) assumes a rest position when the light source (10) is switched off and, when switched on, a working position which is axial relative to the beam axis (13) of the light source (10) are offset.

The ratio of the surface of the light coupling surface (23) to the surface of the light outcoupling surface (26) of the light guide element (20) is preferably not equal to 1, in particular to adjust the numerical aperture of fibers of the light guide (20) to the radiation characteristic of the light guide.

The light output surface (26) has a multiplicity of different contours, whereas the light input surface (23) has a circular shape. Figure 3.a shows a further embodiment of the inventive lighting device 1 in a sectional view. The light guide 20, which is not shown in the drawing for illustrative purposes, is arranged in a carriage 200. The carriage 200 itself is in turn arranged in a ball 300 and inside a housing 400. The ball 300 itself is in turn at least partially disposed in the interior of the housing 400 and mounted on the top of the housing 400 slidably. The housing 400 itself is in turn positioned on a circuit board 15 or printed circuit board, in particular fixed. The light source 10, which is not shown in the present drawing, is mounted on the circuit board 15. An optional lid for fixing the ball to the case is not shown in this illustration.

On the one hand, the wall 401 of the housing 400 can be seen. In the example shown, the housing 400 is essentially cylindrical or cylinder-like. Furthermore, the longitudinal axis 402 of the housing 400 is shown in the drawing. Inside the housing 400, a lens 12 for focusing the light emerging from the light source 10 is positioned. The lens 12 is fixed to the housing 400. It lies on the axis 402 of the housing 400. The lens 12 in the present case forms a section of the free jet region 9 according to the invention. The guide surfaces 410 are preferably formed integrally with the housing 400. The guide rails 410 are disposed in a lower area substantially parallel to the housing axis 402. Compared to the distance between the guide rails 410 to each other in the lower region of the housing, the distance of the guide rails 410 to each other in the upper region of the Housing 400 widened. The lower area is defined by the proximity to the board 15. In contrast, the upper area is defined by the proximity to the ball 300 and the ball element 300. The Fuhrungsflachen or the guide rail 410 will be described again in detail in one of the following figures.

The ball 300 or the ball element 300 is mounted in the upper region of the housing 400. In detail, the ball 300 is mounted on the upwardly extending guide rails 410. It is slidably mounted and thus initially movably mounted. The ball element 300 is preferably formed in two-piece and connectable by means of screws. To recognize the openings for the introduction of the screws. In order to hold the ball 300 in a permanent and stable position, in particular in combination with the housing 400 and the front ring 500, which is still to be described below, a spring element 430 is arranged laterally. This is optional. Thus, the ball 300 is under a bias. To the bias to

To stabilize, the spring force acts at least perpendicular to the housing axis 402. The spring element 430 is presently arranged between the outer wall of the housing 400 and an inner wall or tab 431. This tab 431 or tongue 431 abuts the ball 300. This tongue 431 or tab 431 is in particular formed integrally with the housing 400.

Within the housing 400 and within the ball 300, the carriage 200 is arranged. Shown are, on the one hand, the walls 201 of the carriage 200 and, on the other hand, the downwardly extending fins 210. The walls 201 comprise both the shaded area and the unsecured area. The present carriage 200 has, in particular at least, two fins 210. A fin is mounted on the carriage 200 as a kind of "plate-shaped" attachment in the lower region. The fins 210 may be formed integrally with the housing 201 of the carriage 200.

The illustrated position of the embodiment according to the invention corresponds to the recessed or retracted position. In this case, the light-emitting means 10 is in particular not active. The two fins 210 are guided or held on their outer side by the inner sides of the guide rails 410. A tilting or pivoting of the carriage 200, or of the arranged in the carriage 200 light-guiding element 20 is not possible in this position. In addition, a rotation about the housing axis 401 is not possible and if at all only to a very limited extent. The carriage 200 and the light guide 20 are in their locked, that is sunk, position or position.

The light-guiding element 20 and / or the carriage 200 is or are arranged in the retracted or locked position essentially parallel to the housing axis 401. The basically existing mobility of the ball element 300 mounted on and / or in the housing 400, since the ball element 300 is connected to the housing 400 via the carriage 200, is also severely restricted or even suppressed.

FIG. 3.b shows a position of the lighting device 1 which essentially corresponds to that shown in FIG

Position of the light guide 20 or the carriage 200 corresponds. In contrast to FIG. 3.a, the light-guiding element 20 and / or the carriage 200 are in a position or position which is sunk deeper in relation to the ball 300 and the housing 400. In the The following figures, the spring element 430 is no longer shown. For example, the carriage 200 has been pushed down by a user in the direction of the housing axis 401. This corresponds to the first step of activating the luminous means 10. The process of

Activating or deactivating the luminous means 10 will be illustrated in detail with reference to one of the following figures.

Figure 3.c corresponds to the embodiment shown in Figure 3.a. However, the carriage 200 in the present position is in its extended position. The light-guiding element 20 is in its active state. The fins 210, which were locked in Figure 3.a by the lower portion of the guide rails 410, are now, due to the larger diameter in the upper portion of the housing 400, in a released position relative to the housing 400. Tilting or pivoting of the fins 210 and thus also of the carriage 200 and the light-guiding element 20 is possible in this embodiment. The process of tilting is explained in detail in the three following figures. The fins 210 have now come into engagement with a recess 301, which is arranged in the lower region of the ball 300. By tilting and / or pivoting the carriage 200 or the light-guiding element 20, the ball 300 is now also tilted and / or swiveled. By placing the outer surfaces of the carriage 200 on the one hand in the upper part of the ball 300 on the inside of the ball 300 and the other on the fins 210 on the inside of the ball 300 in the lower region of the carriage 200 is safely and precisely guided and / or held ,

FIG. 3-d shows a position of the light-guiding element 20 or of the carriage 200, which essentially corresponds to the position shown in Figure 3.c. In contrast to FIG. 3 c, the light-guiding element 20, and thus also the ball 300 and the carriage 200, are inclined to the housing axis 401. For example, the light-guiding element 20 is inclined at an angle of approximately 8 ° to the housing axis 401. Due to the possibility of pivoting and / or tilting the illumination device 1 according to the invention, different areas can be specifically illuminated. Another difference is that the slide 200 is sunk a little deeper than in Figure 3.c. However, the countersinking is shown only by way of example and is not necessarily required for a tilting of the light-guiding element 20.

It can be seen that the fin 210 shown in the figure on the right for engagement with the guide rail

410, in particular in the central region of the guide rail 410, comes. The fin 210 shown on the left in the figure is initially in a free position inside the housing 400. By the plant of the one, here right, fin 210 to the guide rail 410, the tilting and / or pivoting is guided defined on the one hand, in particular controlled. In addition, the design of the guide rail 410 also results in a restriction in the maximum tilt and / or swivel angle of the carriage 200 and / or the light-guiding element 20. Since the light-guiding element 20 and / or the carriage 200 is held and guided in the ball 300, respectively ., the ball 300 also pivots with the carriage 200. The carriage 200 may also be referred to as a guide carriage 200.

The position of the carriage 200 and / or of the light-guiding element 20 shown in FIG. 3 e substantially corresponds to the position shown in FIG. 3 d. In contrast to FIG. 3.d, the light-guiding element 20 is tilted at a larger angle to the housing axis 401. In the present case, the carriage 200 and / or the light-guiding element 20 is tilted by an exemplary angle of approximately 12 ° with respect to the housing axis 401. Due to the increasing tilting, the fin 210 shown on the right in the figure is in a higher position than the fin 210 shown in FIG. The fin 210 shown on the right in FIGS. 3.d and 3.e is in its active position. The active position is understood to mean that the fin 210 is in contact with the guide rail 410. The fins 210 may also be referred to as guide fins 210.

The position of the light-guiding element 20 shown in FIG. 3.f substantially corresponds to the position already shown in FIG. 3.e. In contrast to FIG. 3.e, the light-guiding element 20 and / or the carriage 200 are in an even further tilted position or position. In the present case, the tilt angle is approximately 20 degrees to the housing axis 401. The fin 210 shown in the figure on the right is in its free position. Under a free position, it is understood that the fin 210 may still be in contact with the guide rail 410. Also, the fin 210 is rotatable in this area by a larger area, and in particular rotatable in a plane which is perpendicular to the housing axis 410. The light-guiding element 20 is freely rotatable in this position within certain limits, preferably about the housing axis 401, and free tilting and / or pivoting about a pivot-tilting point 28. The guide rails 410 form a control cam or a

Reset curve for the movement of the carriage 200 and / or the light guide 20 and in particular also the ball 300, since the carriage 200 is disposed within the ball 300. The light guide 20 can thus be moved defined within certain limits. Figure 4.a shows the lighting device 1 in a further sectional view. In the present case, the light guide 20 and the front ring 500 is now shown. The front ring 500 or the holder 500 is used for

Positioning or fixing of the ball 300 on the housing 400. The front ring 500 serves as a contact surface for the projections 310 shown in Figure 6.a. The light guide 20 is in the interior of the carriage 200 in the present case by two brackets 202, 203 attached. For simplicity, the representation of the luminous means 10 and the lens 12 has been omitted. The light impinges on the light incoupling surface 23 of the light element 20 from below. The light is then guided along the light guide 22 through the light guide 20. In its upper region, the light-guiding element 20 has a bending region 27. The light is led around the corner, so to speak. It then exits via the light output surface 26 from the light guide. Thus, in the present embodiment, the light exits laterally from the lighting device 1. The illuminated area may be changed by rotating the carriage 200 about the housing axis 401 and / or tilting the carriage 200 about a pivoting tipping point 28. In the upper area of the carriage 200 is also a symbol button 204, for example in the form of a translucent window 204. Thus, it can be detected by this window 204, whether the lighting device 1 is in an active or inactive state. However, the symbol button 204 may also be opaque, ie not translucent. The symbol button 204 can be printed with a symbol, for example a lamp symbol, or has a corresponding texture / embossment on its surface. Evident is also in the drawing, the damping device 320 according to the invention, which dampens the movement of the carriage 200 in the ball 300 and / or targeted, especially supportive leads. The damping element 320 is presently designed as a type of gear 320. The damping element 320, cooperates with a structuring 330, which is arranged or introduced on or in the inside of the ball 300. The structuring 330 in the inside of the ball 300 may be formed as a kind of row of teeth, which engages in the teeth of the gear. By virtue of the damping element 330, there is no "jerky" insertion and removal of the carriage 200, but the carriage 200 can slide in a defined manner.

Furthermore, the stop surfaces 360 and 420 or stops 360 and 420 can still be seen. The stopper 360 is disposed inside the ball 300. The stopper 420 is disposed inside the housing 400. Their function will be explained below in connection with FIG.

The position of the light-guiding element 20 and / or of the carriage 200 shown in FIG. 4 b substantially corresponds to that shown in FIG. 4 a. However, the sectional view is changed in the present case by an angle of 90 °. In this embodiment, structuring 330 in the inside of the ball 300 can be seen. Furthermore, the gear 320 in the housing 400 and in the ball 300 is shown. The fins 210 for guiding the carriage 200 in the housing 400 are not shown in the present illustration. However, it is also shown, in the figure on the right side of the carriage 200, a projection 220 which is disposed on the one lower side of the carriage 200 and extends downwardly. This projection 220 is preferably formed integrally with the housing 201 of the carriage 200. This projection 220 may also be referred to as a fin 210. Because the protrusion 220 can, preferably supporting, also participate in the leadership of the carriage 200 in the housing 400. An essential function of this projection 220, however, is to trigger the switching operation for activating and / or deactivating the luminous means 10. In the present case, the light-conducting element 20 or the device 1 is in its active position. The switch 17 is at the

Housing, positioned in the right side of the figure. Preferably, the switching element 17 is mounted in a receiving pocket, which is not shown. Characterized in that the projection 220 is in its or an upper position, the switch 17, which is also referred to as switching element 17, in a released position. The light source 10 is activated. The circuit electronics or the wiring is not shown here. If the switching element 17, as stated above, designed as a mechanical switch 17, this switching operation operates via a contact of the projection 220 with the switching element 17. In a further embodiment, the switching operation, however, can be triggered without contact. In such a case, the proximity of the projection 220 to the position of the

Switching element 17 sufficient. This proximity is achieved by an import or lowering of the carriage 200. Regardless of the embodiment of the switch 17, the switch is offset as far back or down, so that a switching operation is only triggered when the lateral movement of the light guide 20 and the carriage 200 is completed. As a result, damage to the switch 17, for example by a still slanted carriage, can be effectively prevented. FIG. 5 shows a perspective detail view of the inner region of the housing 400 in a plan view. The housing 400 is shown without the ball 300 and carriage 200 being inserted therein. Evident is also the spring element 430 for biased holding the ball 300. The tab 431 is presently formed by the bottom of the guide rail 410. In particular, the inventive guide rail 410 is shown in detail. In the lower area, the guide rail 410 is formed as a kind of groove. This groove forms the second, preferably lower, portion or section 412 of the guide rail

410. The inner surfaces 416 or guide surfaces 416 are essentially not bevelled here. They form the sides of a substantially rectangular cuboid. At the upper portion of the second portion 412, a first portion 411 connects. This portion 411 is widened in diameter relative to the second portion 412. The inner surfaces 415 or guide surfaces 415 of the guide rail 410 are also bevelled in this first section 411. The diameter increases from bottom to top, preferably steadily. The broadened diameter of the guide rail 410 in the first, i. upper, section

411, and the formation of the guide surfaces 415, 416 and 417 provide for simplified threading or imports of the fins 210 upon lowering or imports of the light guide 20 into the housing 400. The fin 210 is guided thereby defined from a free position to the locked position. The locked position of the fin 210 and thus also the locked position of the

Light guiding element 20 is defined by the second, ie lower, section 412, of the guide rail 410. In the locked position, the fin 210, which is also referred to as Fuhrungsfmne 210, and thus the light-guiding element 20 is substantially no longer rotatable. One possible limited rotatability may be due to a reduced thickness of the fin 210 relative to the diameter of the guide rail 410 in the lower region 412. In addition, the broadening in the upper section 411 of the guide rail 410 ensures a rotatability or freedom of rotation of the fin 210 and thus also of the light-guiding element 20.

The guide surfaces 415 and 416 allow on the one hand the rotational movement of the light-guiding element 20 or of the carriage 200, in particular without there being any jamming or jamming of the fins 210. The guide surfaces 415 also "catch" the rotational movement and / or the pivoting movement of the fins 210 and thus also of the light-guiding element 20. They guide this

Light guide 20, in particular from any position, in the retracted position back. The guide surface 417 serves to guide the pivoting movement of the light-guiding element 20, in particular without jamming or jamming of the fins 210. The

Guide surface 417 "catches" the pivoting movement of the fins 210 and leads the light guide 20, in particular from any position, in the retracted position.

In an extended position of the light-guiding element 20 is possible by the possibility of a pivoting movement and a rotational movement of the light guide 20, within defined limits, any spatial illumination. The design of the guide rail 410 and the fins 210 and their interaction, a return from any position of the light guide 20 in the retracted position is possible. The retracted position can also be referred to as zero position. It is so to speak, a 3-dimensional feedback, which can also be generated by a pivoting and rotating movement.

At the top of the first section 411, another section 413 follows. This is the so-called third section 413. This participates firstly in the introduction process of the fins 210. However, the essential function of this third section 413 is the bearing of the ball 300. This third section 413 thus constitutes a bearing surface for the ball 300.

The guide rail 410 is formed in all three sections 411, 412 and 413 in the present case by a kind of rib-shaped ridge. The third section 413 has on the sides, which are remote from the Fuhrungsflachen, another

Area. This is the so-called stop surface 414. This can be bevelled. By this surface 414, or by this survey, is alternatively or additionally, the rotation or freedom of rotation of the ball member 300 and thus the rotation or

Rotational freedom of the light-guiding element 20 is limited. This is achieved in that at least in sections over the outer circumference of the ball 300 elevations 310 and projections 310 are distributed. These come into contact with the stop surface 414 during rotation and thus limit the rotatability of the ball 400 and thus also of the light-conducting element 20.

The aforementioned projections 310 are shown in detail in FIG. Figure β.a shows an outside view of

Ball element 300 and the carriage 200 introduced therein. The light guide element 20 and / or the carriage 200 is or are located in Figure .beta.a in its extended, ie upper, position. The projections 310 are on the outside of the ball element 310, preferably evenly distributed over the circumference. The distribution of the projections 310 is particularly adapted to the arrangement of the abutment surfaces 414 or the distribution of the guide rails 410. These projections 310 then come with a rotation of the ball member 300 relative to the housing 400 to rest against the ribs mentioned above to Figure 5, which form the guide rails 410. The protrusions 310 come into contact with the front ring 500 shown in FIG. 4.a during the pivoting of the light-guiding element 20. They can thus also define the maximum swivel angle of the light-guiding element. As a result, tensioning of the fin 210, which is shown for example in FIG. In the lower region of the carriage 200, the projection 220 can be seen, which triggers the switching operation on the switching element 17. Furthermore, a recess 340 is introduced in the circumference of the ball 300. This recess 340 serves for preferably movable mounting of the engagement element, not shown here. The engagement element will be explained below with reference to the figures β.b and 7.

FIG. 3 b shows an inside view of one side of the ball element 300 according to the invention. The recess 340, in the present case designed as an opening, can be seen in the outside of the ball element 300. In this recess 340, the engagement element, which is not shown here, is movable attached. Another important feature is the projection 350 in the inside of the ball 300 to call. This projection 350 is positioned, so to speak, next to the recess 340. At this projection 350, the spring element, not shown here, for biasing the carriage 200 relative to the ball member 300 is attached. In order to better illustrate the interaction, the figure β.b and Figure 7 are explained together. FIG. 7 shows a External view of the lower portion of an outer side of the carriage 200 can be seen on the one hand on the outer sides of the two fins 210. Furthermore, the projection 220 is shown for activating the switching operation of the bulb 10 in the lower region. Of the

Projection 220 may also be referred to as an actuator for the switching operation.

Evident is also, laterally offset from the actuator 220, a projection 250, which preferably in

Substantially corresponds to the projection 350 shown in Figure 6.b. The projection 250 also serves to secure the spring element and is preferably arranged in a kind of recess or trench 260. The trench 260 serves to guide the spring, so that contact of the spring with the carriage is prevented. Laterally offset from the projection 250 or from the trench 260 is a groove or recess 270. This groove 270 represents the control cam 270. The control cam 270 is in the present case designed as a heart cam 270. The engagement member, preferably formed as a kind of hook, is held at one end by the recess 340 in the ball 300 and engages at the other end in the cam 270 for engagement. The engagement element is in this case slidably mounted in the control cam 270. About these

Control cam 270, the circuit and / or the movement of the carriage 200, in particular of the light-guiding element 20, controlled.

A spring, preferably a coil spring, is held by the two projections 250 and 350. As a result, the ball 300 and the carriage 200 are biased against each other. By a force from the outside, preferably from above, for example exerted by a user or user, the carriage 200 is moved downward. This will be the Spring still tense. The restoring forces increase. The engagement element is guided according to the deflection in the control cam 270.

The heart cam 270 engages two positions, a first, preferably upper, latching point 271 and a second, preferably lower, latching point 272, in which the engagement element can engage or remain in place. In the upper latching point 271, the light-guiding element 20 is in its retracted, preferably deactivated, position or position. The system is biased by the spring. In the lower latching point 272, the light-guiding element 20 is in its extended, preferably activated, position or position. The arrows show the direction of circulation of the

Engagement element in the heart cam 270. This first latching position 271 corresponds to the position shown in Figure 3a.

The light-guiding element 20 is now pressed slightly downwards. As a result, the engagement element is released and moves in the illustrated cam 270 to the top right. The light guide 20 is sunk deeper in the housing 400 and the ball 300. This position corresponds to the position shown in Figure 3b. The heart curve is extended in this upper region 273 shown on the right in the figure. In this upper heart region, a groove 273, preferably arranged parallel to the housing axis 402, is introduced. Thus, the engagement element comes, even at maximum

Penetration depth of the light-guiding element 20, not for abutment against the upper inner wall of the heart cam 270. The penetration depth is not defined here by the stop of the engagement element on the inner upper wall of the heart cam 270. The maximum penetration depth is defined by the in Figure 4.a shown mechanical stop 420. This is in particular the fin 210 to the plant. As a result, the engaging element can not be brought into contact with the upper right edge of the heart cam 270 even when handled improperly, for example due to excessive impressions of the light guide element 20, and can be printed out of it or even destroyed. In both cases, this would lead to a malfunction or even destruction of the lighting device.

By removing the force acting from above, i. by releasing the light-guiding element 20, the carriage 200 is pulled upwards by the spring force. The engagement element moves in the trench shown on the right from top to bottom. However, it does not come into contact with the lower edge of the heart curve 270. Rather, the heart curve 270 is extended at its tip by a further groove 274, which is preferably arranged parallel to the housing axis 402. The protruding out of the light-guiding element 20 or its maximum external position is not defined here by the stop of the engagement element at the tip of the heart cam 270. The maximum outer position is defined by the mechanical stop 360 shown in Figure 4.a. This comes to rest on a arranged on the outside of the carriage 200 stop.

As a result, the engagement element can not be brought into abutment with the lower edge of the heart cam 270 even when handled incorrectly, for example by a rough pulling on the light guide element 20, and can be printed out of it or even destroyed. The engagement element is held by the spring force at the point 272, ie without bearing against the lower inner wall of the heart curve 270 or the apex of the heart. The spring force prints the carriage 200 against the stop 360 in the ball element 300. This lower point corresponds to the second engagement point 272. In this Snap point 272 is the light guide 20 and / or the carriage 200 in the extended, ie active position. This corresponds to the position shown in FIG. 3d.

If the light-guiding element 20 is to be deactivated again, then a force is to be exerted on the light-conducting element 20 and / or the carriage 200 from above. As a result, the engagement element against the spring force is guided back up or the carriage 200 is guided downward, so that the engagement element relative to the carriage 200 and the heart cam 270 moves upward. Due to the asymmetrical configuration of the heart curve 270, the engagement element now takes the path shown on the left in the heart curve 270, passes a corner and does not come to rest in the upper left camber of the heart. The force that works from the outside is still present. Also, the heart curve is extended in this upper area shown in the figure on the left. In this upper heart area is one, preferably parallel to

Housing axis 402 arranged groove 275 introduced. Thus, the engagement element, even at maximum penetration depth of the light-guiding element 20, does not come into contact with the upper inner wall of the heart cam 270. The penetration depth is again not determined by the abutment of the heart

Engagement element defined on the inner top wall of the heart cam 270. The maximum penetration depth is in turn defined by the mechanical stop 420 shown in FIG. 4.a. As a result, the engagement element can not be brought into contact with the upper left edge of the heart cam 270 even when handled improperly, in particular during deactivation, or even thrown out be destroyed. By removing the force, the carriage 200 is pulled back upwards by the spring force. The engagement member strikes the central elevation of the heart and is returned to the first detent position 271. The system is again in the starting point already described above. The system is switched off in this state. Because the actuator 220 is located in the vicinity of the switching element 17 and triggers a switching operation. By re-pressing the light guide 20 from top to bottom of the cycle can be repeated.

By the upper extensions 273 and 274 or grooves 273 and 275 and the lower extension 274 or groove 274 of the heart cam 270 is a fuse or destruction protection against improper treatment of

Lighting device 1 ensures. In particular, a malfunction of the engagement member by excessive pressing of the light guide 20 or pulling on the light guide 20 is not possible. The engagement element essentially takes over only the function of the guide from one latching position 271 in the other 272 and vice versa. However, it does not form the stop for the movement or for the latching points 271 and 272. The lighting device 1 can be a

Abuse safety of up to 400 N have.

The lighting device described above is advantageously used as seat lighting and / or reading light for aircraft seats and / or for seats in rail vehicles and / or in motor vehicles, which can be integrated in ceilings, walls or in the seats.

Also, the use as a work lamp that can be integrated into ceilings or walls brings due to the Compact design significant advantages. The same applies to the use of the lighting device in furniture, especially in kitchen furniture or as object lighting in showcases.

The lighting device can be integrated or installed in the ceiling, in the wall or in the seat in such a way that it is at least partially sunk. The lighting device emerges in the extended position of the light guide from the ceiling, the wall or the seat.

Also advantageous is the use of the lighting device as glare-free, possibly retractable instrument lighting in cars, especially as effect lighting especially for aircraft.

Use of the illumination device according to at least one of the preceding claims as integrated microscope illumination.

In particular, the illumination device according to the invention has the advantage that it has a compact design and nevertheless makes it possible to efficiently guide light to the location via a pivotable and / or tiltable light-conducting element, which is displaceable in the direction of the light source should.

Due to the pivoting / tilting mounting of the light-guiding element (20), a high degree of flexibility with regard to the illumination of objects can be achieved. Overall, a particularly compact design is possible with this arrangement, which allows in particular a space-saving installation. Since the at least one light-emitting diode is mounted on a board, which is preferably connected by means of a thermal coupling fixed to a fixed heat sink, even at high

Light output can be dispensed with an active, energy-requiring cooling device.

It will be apparent to those skilled in the art that the above described embodiments are to be understood as exemplary. The invention is not limited to these, but can be varied in many ways without departing from the spirit of the invention. The individually illustrated features can also be combined with each other.

Bezugszeicheπliste

1 lighting device

9 free jet area

10 light source or light source

11 LED

12 focusing element or lens

13 beam axis

14 focus area

15 board or circuit board

16 Control electronics

17 switch or switching element

18 Mechanical fastening and / or thermal

coupling

20 light guide

21 thighs 1

22 light guide axis

23 LichteinkoppeIflache

24 thighs 2

25 light guide axis

26 light output surface

27 Bending area

28 Pivoting and tilting point

29 lighting cone

30 object

40 heat sink

200 carriages or guide carriages

201 Wall of the carriage 202 Holder of the light-guiding element

203 holder of the light guide

204 Window or opaque window or symbol button or symbol panel

210 fin 220 Actuator or actuator surface for switching 250 Projection or pin for securing the spring 260 Trench for spring 270 Control cam or heart cam 271 First latching position or locking position or

Locking in the "Off" position 272 Second locking position or locking position or

Outer position or stop of the carriage in the

Ball 273 Upper extension or upper groove at the top of the heart cam 270

274 Upper extension or upper groove at the upper portion of the heart cam 270

275 Lower extension or lower groove at the apex of the heart curve 270

300 ball or ball element or bearing element

310 projection or stop on the outside of the ball

320 damping element or device

330 Structuring or toothing for damping element

340 Attaching the latch in the ball wall 350 projection or pin for securing the spring

360 stop or stop surface in the ball

400 housing

401 Wall of the housing 402 Axis or longitudinal axis of the housing

410 guide rail or guide funnel

411 Upper area of the guide rail or guide funnel

412 Lower section of guide rail or guide hopper or guide groove 413 bearing surface for the ball element

414 stop surface for the projection 310th

415 guide surface of the guide funnel

416 Guide surface of the guide funnel 417 Guide surface of the guide funnel

420 stop or abutment surface in the housing

430 Spring element for positioning the ball

431 Tab for attachment to the ball

500 front ring or attachment for the ball

Claims

claims

1. lighting device, in particular reading lamp, with a light source (10) and about a pivot-tilt point (28) pivotable and / or tiltable light guide (20), the at least one Lichtleitachse (22) and at least one Lichteinkoppelflache (23) and a Lichtauskoppelflache (26), wherein the Lichtleitelement (20) is preferably arranged axially displaceable so that between the light source (10) and the Lichteinkoppelflache (23) may consist of a free jet area (9).

2. Lighting device according to claim 1, characterized in that the light guide element (20) is arranged axially displaceable.

3. Lighting device according to claim 1 or 2, wherein the pivot-tilt point (28) at the intersection of

Lichtleitachse (22) and the Lichteinkoppelflache (23) is located.

4. Lighting device according to claim 1, 2 or 3, wherein the light-guiding element (20) around the

Lichtleitachse (22) is rotatably mounted.

5. Lighting device according to at least one of the preceding claims, wherein the pivot-tilt angle is less than 40 °, preferably less than 30 °.

6. Lighting device according to at least one of the preceding claims, wherein the light-guiding element (20) relative to the light source (10) is mounted axially displaceable.

7. Lighting device according to claim 6, wherein the Lichtleitachse (22) of the light-guiding element (20) is arranged coaxially relative to the beam axis (13) of the light source (10).

8. Lighting device according to at least one of the preceding claims, wherein the light-guiding element

(20) consists of a transparent plastic or of glass, preferably of a highly transparent borosilicate glass, more preferably of DURAN ^® .

9. Lighting device according to at least one of the preceding claims, wherein the light-guiding element (20) is rigid and composed of a plurality of fibers of a transparent plastic or of glass fibers.

10. Lighting device according to at least one of the preceding claims, wherein the light-guiding element (20) is straight.

11. Lighting device according to at least one of the preceding claims, wherein the light-guiding element (20) is formed by flexible optical fibers.

12. Lighting device according to at least one of the preceding claims, wherein the light-guiding element (20) has at least one bending region (27) which is designed such that the light-guiding element (20) has a limb (21) with a light-guiding axis (22) and a light-coupling surface (27). 23), the perpendicular to the Lichtleitachse (22) is arranged, and a further leg (24) having a Lichtleitachse (25) and a Lichtauskoppelflache (26), wherein the Lichtleitachse (22) and Lichtleitachse (25) at an angle of greater than or equal to 0 ° and less than or equal to 90 °.

13. Lighting device according to at least one of the preceding claims, wherein the light-guiding element (20) is formed from a combination of flexible optical fibers and rigid elements.

14. Lighting device according to at least one of the preceding claims, wherein the Lichtauskoppelflache (26) is polished or slightly frosted.

15. Lighting device according to at least one of the preceding claims, wherein the Lichteinkoppelflache (23) is flat, convex or concave.

16. Lighting device according to at least one of the preceding claims, wherein the surface of the Lichteinkoppelflache (23) is polished and / or provided with an antireflection coating.

17. Lighting device according to at least one of the preceding claims, wherein the light-guiding element (20) has page-emitting properties.

18. Lighting device according to at least one of the preceding claims, wherein the light source (10) comprises a focusing element (12), with which the light beams focusable on a focal plane (14) are, which corresponds to the light input surface (23) of the light-guiding element (20).

19. Lighting device according to at least one of the preceding claims, wherein by the spectral

Course of the absorption of the material of the light-guiding element (20) is effected a targeted adjustment of the color temperature of the light emitted by the lighting device.

20. Lighting device according to at least one of the preceding claims, wherein at least one white light LED is used as the light source (10).

21. Lighting device according to at least one of the preceding claims, wherein the circuit board (15) of the light source has a control electronics (16) for the light emitting diode (11), which preferably keeps the current constant.

22. Lighting device according to at least one of the preceding claims comprising a switch (17) with which the light source (10) can be activated and / or deactivated.

23. Lighting device according to at least one of the preceding claims, wherein the circuit board (15) has a circuit with which the light source (10) is dimmable steplessly or in stages.

24. Lighting device according to at least one of the preceding claims, wherein the board (15) with a switch (17), which is preferably connected via a feed line, additional board or a receiving socket and thus the Light source (10) on / off and / or dimmable in one or more stages.

25. Lighting device according to one of claims 22 to 24, wherein the switch (17) is contactless switchable.

26. Lighting device according to one of claims 22 to 25, characterized in that the light element or on the border of the light element (20) a

Permanent magnet is arranged with which the switch (17) is betatigtbar.

27. Lighting device according to one of claims 22 to 26, with a switch (17) which is magnetically, optically, inductively, capacitively or by Hall effect betatigbar.

28. Lighting device according to one of claims 22 to 27, that the switch (17) is actuated by a pan-tilt movement of the light-guiding element (20) and / or a rotational movement about the Leitleitachse of the light-guiding element (20) and / or an axial displacement of the light-guiding element.

29. Lighting device according to at least one of the preceding claims, wherein the light element (20) a reflection element is arranged.

30. Lighting device according to claim 29, wherein the reflection element as a mirror or as

Foil or by applying a contrasting color is formed.

31. Lighting device according to at least one of the preceding claims, comprising a heat sink (40) which is part of a housing attachment for the lighting device.

32. Lighting device according to at least one of the preceding claims, wherein the light-guiding element

(20) of the illumination device (1) in the switched-off state of the light source (10) a

Resting position and in the on state has a working position, which is shifted along the beam axis (13) of the light source (10).

33. Lighting device according to at least one of the preceding claims, wherein the ratio of the surface of the light input surface (23) to the surface of the light outcoupling surface (26) of the light-guiding element (20) is not equal to 1.

34. Lighting device according to at least one of the preceding claims, wherein the light output surface (26) has an arbitrary contour, wherein the light input surface (23) is circular.

35. Lighting device according to one of the preceding

Claims characterized by a displaceable carriage (200) for holding and for axially guiding the light-guiding element (20).

36. Lighting device according to one of the preceding

Claims characterized by a ball (300) for supporting the carriage (200).

37. Lighting device according to one of the preceding

Claims characterized by a housing (400) for receiving the ball (300) and / or the carriage (200).

38. Lighting device according to one of the preceding claims, characterized in that the Lichtleitachse (22) of the light-guiding element (20) is arranged at least in sections, in particular temporarily, parallel to the housing axis (402).

39. Lighting device according to one of the preceding

Claims characterized in that the light-guiding element (20) at least partially within the carriage (200) to the housing axis (402) is inclined, in particular curved or angled, so that the light can escape laterally through the light output surface (26).

40. Lighting device according to one of the preceding

Claims characterized in that the carriage (200) at least partially has the shape of a pin, at its lower end at least one fin (210), preferably two fins (210) for guiding the carriage (200) in the ball (300) and / or is arranged in the housing (400) or are.

41. Lighting device according to one of the preceding claims, characterized in that the light guide (20) and / or the carriage (200) in the ball (300) axially movable and / or in the housing (400) is arranged movable or are.

42. Lighting device according to one of the preceding

Claims characterized in that the housing (400) is integrally formed.

43. Lighting device according to one of the preceding

Claims characterized in that the light guide (20) and / or the carriage (200) extends through the ball (300) or extend.

44. Lighting device according to one of the preceding claims, characterized in that the ball (300) on and / or in the housing (400), in particular slidably, is movably mounted.

45. Lighting device according to one of the preceding claims, characterized in that the ball (300) on, preferably four, ribs, which are arranged at least partially in the interior of the housing (400), is mounted.

46. Lighting device according to one of the preceding claims, characterized in that the ball (300) on its outer side has at least one projection (310) which can come to rest on the ribs and thus a rotational movement of the ball (300) relative to the housing (400 ) is spatially limited.

47. Lighting device according to one of the preceding claims, characterized in that the ball (300) has a recess (340) in which an engagement element, which is in particular designed as a hook, movable, in particular rotatable, is fixed.

48. Lighting device according to one of the preceding

Claims characterized in that the engagement element engages in a groove defining a, preferably 2-dimensional, cam (270) disposed on an outside of the carriage.

49. Lighting device according to one of the preceding claims, characterized in that the control cam (270) substantially as a heart cam (270) is formed which preferably downwardly and / or upwardly through at least one, preferably substantially linear, foothills (273, 274, 275) is extended.

50. Lighting device according to one of the preceding

Claims characterized in that the engagement element in at least two positions (271, 272) in the control cam (270), which in particular define a retractable and an extended position of the light-guiding element (20), lockable, in particular latched, is.

51. Lighting device according to one of the preceding claims, characterized in that the heart curve (270) is constructed at least partially polygonal.

52. Lighting device according to one of the preceding claims, characterized in that the light-guiding element (20) and / or the carriage (200) against the pressure of a spring, for example a tension spring, in particular axially, is movable.

53. Lighting device according to one of the preceding claims, characterized in that the control cam (270) and the spring on the same side of the carriage (200) are arranged.

54. Lighting device according to one of the preceding claims, characterized in that the spring and the combination of engagement element and control cam (270) cooperate such that the

Light guide (20) and / or the carriage (200) in a retracted position (271) and in an extended position (272) can remain or can, in particular latched or are.

55. Lighting device according to one of the preceding

Claims characterized in that the movement of the fin (210) is controlled by at least one guide surface (415, 416, 417) arranged in the interior of the housing (400).

56. Lighting device according to one of the preceding

Claims characterized in that the guide surface (415, 416, 417) for the fin (210) is provided by a guide rail (410) arranged in the inside of the housing (400).

57. Lighting device according to one of the preceding

Claims characterized in that the guide rail (410) widens in its upper region (411) and narrows in its lower region (412).

58. Lighting device according to one of the preceding claims, characterized in that the guide rail (410) is formed by at least two sections (411, 412), wherein the first upper section (411) is widened and the second lower section (412) is a, preferably uniform, groove.

59. Lighting device according to one of the preceding

Claims characterized in that the fin (210) is controlled by the guide rail (470) when transferring the light guide (20) from its extended position (272) to its recessed position (271) such that the carriage (200) is released from the released one Position is transferred through the constriction in a tightly guided, especially locked, position.

60. Lighting device according to one of the preceding

Claims characterized in that the light-guiding element (20) and / or the carriage (200) is not rotatable in the retracted position.

61. Lighting device according to one of the preceding

Claims characterized in that the light guide element (20) and / or the carriage (200) in the extended position by a defined

Angle, preferably about its own axis and / or the housing axis (402), is rotatable.

62. Lighting device according to one of the preceding claims, characterized in that the light-guiding element (20) and / or the carriage (200) in the extended position is pivotable or tiltable about the pivot-tilt point.

63. Lighting device according to one of the preceding claims, characterized by a damping device (320) for damping the movement of the light-guiding element (20) and / or the carriage (200), in particular during the run-out by the spring force.

64. Lighting device according to one of the preceding claims, characterized in that the damping element (320) acts during extension, during retraction or both during extension and retraction of the light-guiding element (20) and / or the carriage (200).

65. Lighting device according to one of the preceding claims, characterized by at least one optical component (12), in particular a lens, for guiding the light from the light source to the Lichteinkoppelflache (23).

66. Lighting device according to one of the preceding claims, characterized in that the housing (400) has fastening means to which the lens, preferably exchangeable, is attached.

67. Lighting device according to one of the preceding claims, characterized in that the switching element (17) is arranged in a receiving pocket which is fixed in the interior of the housing (400).

68. Lighting device according to one of the preceding claims, characterized in that the switching element with at least one projection of the carriage, which is arranged on the lower side of the carriage (200), cooperates, so that a Switching operation for activating or deactivating the light source (10) can be triggered.

69. Lighting device according to one of the preceding claims characterized by a spring element

(430) disposed in the upper portion of the housing (400) for positioning the ball (300) on the housing (400).

70. Lighting device (1), in particular according to one of the preceding claims, with a destruction protection for a latching mechanism, wherein the lighting device (1) comprises a, preferably rotatable, bearing element (300), in which a carriage (200), a

Lighting element, preferably a light-conducting element (20) carries, in particular axially displaceable, wherein on the displacement of a latching element in a control cam at least one locking position (271, 272), in particular a latching position (271, 272), of the carriage (200) in the bearing element (300) is generated, so that in at least one direction of movement of the carriage (200) in the bearing element (300) the movement of the carriage (200) is limited by at least one stop such that the latching element maximally up to the contact position of the latching element on an outer wall the control cam (270), but not beyond, is movable.

71. Lighting device according to the preceding claim, characterized in that the movement is limited so that it ends before the contact position of the latching element on the wall of the control cam (270).

72. Lighting device according to one of the two preceding claims, characterized in that the control cam (270) has at least one extension (273, 274, 275) which is formed such that the

Arresting element in a movement until it stops not on the outer wall of the control cam (270) comes to rest.

73. Light guide, in particular for a lighting device according to one of the preceding claims, comprising a Lichtleitachse (22) and at least one Lichteinkoppelfläche (23) and a Lichtauskoppelfläche (26).

74. Use of the lighting device according to at least one of the preceding claims as a seat lighting and / or reading light for aircraft seats and / or seats in rail vehicles and / or in motor vehicles.

75. Use of the lighting device according to at least one of the preceding claims as a work light, which is integrable in ceilings or walls.

76. Use of the lighting device according to at least one of the preceding claims in furniture, in particular in kitchen furniture.

77. Use of the lighting device according to at least one of the preceding claims as object lighting in showcases.

78. Use of the lighting device according to at least one of the preceding claims as Glare-free, possibly retractable vehicle lighting in cars.

79. Use of the lighting device according to at least one of the preceding claims as an integrated microscope illumination.

80. Use of the lighting device according to at least one of the preceding claims as a lighting element in vehicles, in particular as effect lighting, especially for aircraft.