EP2789904B1 - Portable lighting device with bending rods - Google Patents

Description

The invention relates to a portable lighting device according to the preamble of claim 1.

Transportable lighting devices are known as floor lights and are used, for example, for temporary illumination of a construction site, an accident site or a work area.

The EP 1 059 483 A2 shows such a transportable lighting device. The lighting device consists essentially of a light balloon with a light source, such as a metal halide lamp, and a tripod with retractable telescope, with the aid of the height of the light balloon can be adjusted with the light source. So it is possible to extend the telescope so far that the light source reaches a height of 4 to 5 m, in order to achieve a uniform illumination of the job.

The light-emitting device designed as such a light balloon may comprise a light source and a lampshade surrounding the light-emitting means, at least partially translucent, whereby the so-called light balloon is formed.

The lampshade may consist of an elliptical or spherical balloon envelope which completely surrounds the illuminant. It is possible that the lampshade or the balloon envelope consists of two halves, of which, for example, the upper half consists of a reflective textile material and the lower half of a translucent material. The light emitted by the light source is then reflected by the reflective material of the upper half downwards and thus amplifies the already directly exiting through the lower half of light.

The lampshade can be clamped by a clamping device, wherein the clamping device similar to an umbrella has elastic rod elements which press from the inside against the screen material. In a state of tension, the lampshade is stretched and forms the so-called light balloon. In contrast, in a state of relaxation, the lampshade can be limp or longitudinally stretched to save storage space.

Wacker Neuson Production GmbH & Co. KG 14 000 882.2-1795 File: 65773 15.09.2015 As in the EP 1 059 483 A2 disclosed, the elastic rod elements (bending rods) of the clamping device are attached to an upper and a lower support. By moving the brackets axially towards one another, the bar elements bend outwards and thus clamp the lampshade. When moving apart of the two brackets the lampshade is relaxed and stretched in the longitudinal direction of the column device.

Similar lighting devices are off JP 2007 103204A . JP 2003 157712 A . JP 2004 095517 A . US 2010/142209 A1 and WO 2009/070055 A2 known.

In the US 2002/0118539 A1 a lighting device is shown with a clamping device surrounding a lighting device. The tensioning device is movable between a relaxed state and a tension state, having a plurality of elastic rod members pivotally attached to upper and lower brackets. At the ends of the rod elements each T-connector are formed, which engage pivotably in corresponding receptacles on the brackets.

The entire clamping mechanism is designed such that the lighting device or its light balloon in the transport state requires the smallest possible pack size.

In order to achieve the spherical shape and thus the balloon shape of the envelope, hinge pieces are provided at the respective ends of the rod elements, which are fastened via a rotatable axle respectively to the upper and lower bracket. In order to connect a respective rod element with the associated joint piece, clamping is usually achieved with the aid of a laterally attached screw in order to effect a frictional connection. This means that the end of a rod element is inserted into the joint piece and clamped there with the help of the perpendicular screw. Between the end face of the screw and the rod element acts a frictional force, which holds the rod member in the joint piece.

Due to the mostly mobile application of a portable lighting device, however, mechanical impacts in the form of impacts, shocks and vibrations are to be expected. In order to prevent unintentional loosening of the screw and thus detachment of the rod element, the screws are fixed by appropriate securing devices.

If, despite the precautionary measures, a rod element separates from the joint piece, there is a risk that the relative pointed end of the rod element will damage the sensitive lamp shell or the lampshade. In addition to the This caused functional impairment of the lampshade is the risk that the protection of the operator from touching the usually very hot light bulb as well as the protection against the ingress of moisture is no longer guaranteed. In addition, there is a risk of injury to the operator when a rod member during maintenance or repair jumps out of its holder, namely the hinge piece.

The invention has for its object to provide a portable lighting device in which the necessary for the mounting of the lampshade rod elements can be reliably held by the respective associated joint pieces.

The object is achieved by a portable lighting device with the features of claim 1. Advantageous embodiments are specified in the dependent claims.

A mobile or portable lighting device has a lighting device and a carrying the lighting device, extending in a longitudinal support means. The lighting device may be designed to accommodate at least one lamp and have at least a part of the lamp surrounding, at least partially translucent lampshade. There is provided a tensioning device which is fixable in a tension state by the tensioning means tensioning the lampshade for holding the lampshade in an open and usable state, wherein the tensioning device is also movable to a relaxation state in which the tensioning device does not tension the lampshade. The tensioning device has a plurality of elastic rod elements, which clamp the lampshade in the state of tension, wherein in each case a lower end of a rod member is pivotably attached to a lower bracket and an upper end of the rod member to an upper bracket. For connecting one end of a rod member to the respective holder, a hinge piece is provided, on which the end is fixed, wherein the hinge piece is pivotable relative to the holder. The distance between the lower support and the upper support may be variable, wherein the distance in the stress state is less than in the relaxation state. At least one end of a rod element is held positively in the respective associated joint piece.

The lighting device can thus be arranged at the end of, for example, support or columnar support means and form a so-called light balloon, which is formed by clamping the lampshade with the aid of elastic rod elements. The rod elements are inserted at their ends in each case in the joint pieces, which in turn are in turn pivotally mounted on the upper and on the lower holder. When changing between voltage and relaxation state, the joint pieces can be pivoted relative to the brackets, so that a Nachausßenbiegen the rod elements is allowed to aufzuspannen the lampshade.

While the rod elements in the prior art in the respective joint pieces are held non-positively (friction), it is inventively provided to hold the rod elements positively in the joints. The positive connection allows a secure connection between the ends of the rod elements and the joints, which can not be lifted even in hard construction site operation with vibrations, shocks and blows. Unlike screw connections, which can loosen despite appropriate security measures, the form-fitting is so robust that it has lasting existence.

To achieve the positive connection between the end of the rod member and the joint piece, the rod element can be inserted into a recess in the joint piece and have a kink at its respective end. A locking element held in the joint piece can be provided, by which the end of the rod element is held in the region of the kink in the joint piece.

This means that the rod element made, for example, of an elastic wire material is bent at its end, for example with a bend angle of 90 ° (but also smaller or larger bend angles are readily possible). In the region of the kink, the locking element extends and forms an undercut for the rod member, so that the end of the rod member can not be pulled out of the recess of the joint piece. The angle created by the buckling allows the locking element to undercut the end of the rod element and thus to hold the rod element positively.

Instead of a sharp-edged kink, the kink can also be loop-shaped, wherein the loop at least partially surrounds the locking element. Due to the partial enclosure, an undercut for the rod element is also formed by means of the locking element, so that the rod element can not be removed from the joint piece.

The recess may be, for example, groove-shaped, wherein the locking element may be a pin which penetrates the joint piece and the groove-shaped recess in such a way that the inserted rod element is held in a form-fitting manner in the recess at the kinked position.

In this case, the groove-shaped recess may have a width which is slightly larger than the diameter of the rod element, so that the rod element can be easily inserted into the groove. The pin then extends e.g. transverse to the longitudinal extension of the rod member, so that it fixes the rod element in the articulated piece in the region of the kink point.

The joint piece can be pivotable about an axis of rotation relative to the holder supporting the joint piece, ie the upper or the lower holder, wherein the axis of rotation is formed by the pin. In this case, the pivotal action (pivoting function) and the locking action (locking function) are integrated together in the component pin. The pin thus fulfills both functions. The pin may be formed for example in the form of a bolt, pin or a screw.

In one variant, the pin is axially inserted into the joint piece during its assembly. A securing device which can be fastened to the respective holder can be provided for positively preventing the pin from being pushed out of the joint piece. This means that the pin is inserted in its mounting in the joint piece and then the securing device is attached to the bracket to "lock" the way back for the pin. The pin can thus no longer slide out of the joint piece.

For example, the securing device may be formed by a securing element or a locking plate, which is screwed to the holder after the pin has been inserted into the joint piece.

In one variant, the pivot angle of the joint piece relative to the support piece each supporting the bracket by a acting between the joint piece and the bracket stop means may be limited. The stop device defines the pivot angle at least in one direction, so that the pivot angle of the joint piece can not be arbitrarily large. In this way, a predefined end position of the rod elements can be achieved even in the state of stress, that is in the state of the spanned light balloon, so that the lampshade or the light balloon receives the desired shape.

In one variant, the pivot angle of a joint held on the upper bracket between the state of stress and the state of relaxation can be up to 90 °. The pivot angle of a joint held on the lower bracket between the state of tension and the state of relaxation On the other hand, it can only be up to 70 °, in particular up to 60 °, in particular up to 50 °, in particular up to 40 °.

This means that the swivel angles on the upper bracket and lower bracket are different. Thus, the upper end of the rod member can be pivoted by up to 90 ° on the upper support, so that it is pivoted, for example, from the vertical position, which is expedient in the relaxed state, into a horizontal position. The lampshade is thus stretched very wide in the upper area, in the area of the upper holder.

In the lower area, however, on the lower bracket, the swivel angle is significantly limited and can be, for example, only up to 40 °. This means that the lower end of the rod element is only pivoted by 40 ° out of its vertical orientation, which is expedient for the state of relaxation, and thus still extends relatively clearly with a vertical component.

Combining the two swivel angles on the upper and lower brackets results in a balloon shape for the lampshade, which is similar to that of a hot air balloon: in the upper area, a large width extension is achieved with a kind of raised "shoulder" from which the balloon then slants falls down to the lower bracket.

With this balloon shape or shape of the lampshade can be achieved that the lampshade has a large light exit surface down. A significant part of the lampshade thus serves for lighting. The upper, upward part of the lampshade, however, can be formed by a reflective or non-translucent material, so that the upward light rays are reflected and deflected downwards towards the workplace.

The lower holder and the upper holder may be arranged on the column device in the longitudinal direction axially to each other. It may be particularly useful if the lower bracket and the upper bracket are axially movable to each other to allow the clamping of the clamping elements or rod elements. Depending on the configuration, one of the holders can be fixedly attached to the carrying device, while the other holder is movable relative thereto. Likewise, it is also possible that both brackets relative to the carrying support means are movable to change the distance between the upper support and the lower support.

The carrying device may have a pillar device which carries the luminous device, extending in a longitudinal direction, and a tripod device carrying the pillar device. The pillar device allows the light device to be positioned relatively high above the ground. The secure state of the column device can be achieved by the tripod device. For example, the tripod device may have three extendable or foldable legs that support the pillar device.

The column device may comprise a telescopic device, with at least two telescopically linearly displaceable telescopic elements. In this way, the vertical length (height) of the column device can be changed to bring the lighting device to a higher height (for example 4 to 5 m). As a result, a uniform illumination of a job can be achieved.

Fig. 1

eine seitliche Perspektivansicht einer mobilen bzw. transportablen Leuchtvorrichtung im Betriebszustand;

Fig. 2

Bestandteile einer Spanneinrichtung der Leuchtvorrichtung in schematischer Darstellung;

Fig. 3

eine erfindungsgemäße Befestigung eines Stabelements an einem Gelenkstück;

Fig. 4

eine untere Halterung in Perspektivansicht;

Fig. 5

die untere Halterung von Fig. 4 in Draufsicht;

Fig. 6

eine Befestigung eines Gelenkstücks mit Stabelement an der oberen Halterung;

Fig. 7

eine Befestigung eines Gelenkstücks mit Stabelement an der unteren Halterung; und

Fig. 8

eine andere Ausführungsform für eine erfindungsgemäße Befestigung eines Stabelements an einem Gelenkstück.

These and other advantages and features will be explained in more detail below with the aid of the accompanying figures with reference to examples. Show it:

Fig. 1

a side perspective view of a mobile or portable lighting device in the operating state;

Fig. 2

Components of a clamping device of the lighting device in a schematic representation;

Fig. 3

an inventive attachment of a rod member to a joint piece;

Fig. 4

a lower holder in perspective view;

Fig. 5

the lower bracket of Fig. 4 in plan view;

Fig. 6

an attachment of a joint piece with rod element to the upper holder;

Fig. 7

an attachment of a joint piece with rod element to the lower bracket; and

Fig. 8

another embodiment of an inventive attachment of a rod member to a joint piece.

Fig. 1 shows a portable lighting device in the operating state.

The lighting device can be easily carried by a user - possibly disassembled into a few components - to the place of use or to different locations. In the upper part of the picture, a lighting device 1 designed as a light balloon is shown. The lighting device 1 has in its interior a non-illustrated lighting means which is almost completely surrounded by a lampshade 2.

The lampshade 2 is characterized by an in Fig. 1 also not shown clamping device clamped in the voltage state shown so that it occupies an elliptical or hot air balloon-like outer contour. The lampshade 2 has an upper half 3a made of a reflective fabric and a lower half 3b made of a translucent material. The light generated in the interior of the lighting device 1 by the lamp or the lamp thus radiates almost completely down and illuminates the underlying work area.

The lighting device 1 is supported on its underside by a column device 4. The column device 4 may be formed as a telescopic device and have a plurality of telescoping elements telescoping. In the example shown, three telescopic elements 5a, 5b, 5c are provided, which can be displaced linearly into one another and locked in their respective relative positions. Corresponding telescopic devices are known, so that at this point a more detailed description is unnecessary.

The column device 4 is supported by a tripod device 6 and in particular prevented from falling over. The pillar device 4 and the tripod device 6 thus together form a supporting device carrying the lighting device 1. The tripod device 6 wiest three tripod legs 7, which are arranged offset on the circumference by 120 °. In this way, the tripod device 6 is supported with three provided at the ends of the tripod legs 7 tripod feet 8 on the ground, which allows a safe and defined state in terms of a tripod.

Below the column device 4, a ballast 9 may be attached, which serves as a transformer for providing a corresponding current for the lighting device 1. The ballast 12 is connected to the construction site network, a public grid or a power generator and converts the power appropriately. In addition, it serves to ignite the light source in the lighting device. 1

The lighting device 1 with the lampshade 2 is often referred to in practice as a "light balloon".

Inside the light balloon (the lighting device 1) is the in Fig. 1 not shown, provided in an appropriate version. The light source is surrounded by the lampshade 2, which is relaxed and elongated in a transport or relaxation state, so it is slender. On the other hand, in a state of tension, the lampshade 2 is clamped outward by rod elements (bending rods) located on the inside, in order to prevent the ingress of light Fig. 1 take characteristic balloon form shown.

Based on Fig. 2 this is clarified:

Fig. 2a ) shows a "skeleton" of the lighting device 1 in the relaxation state, Fig. 2b ) the skeleton in tension. Fig. 2c ) schematically shows a detail of the skeleton.

As a "skeleton" is a support means 10 for the lampshade 2 is referred to. The support device 10 has an upper holder 11 and a lower holder 12. The two holders 11, 12 are arranged axially relative to one another on the column device 4. In particular, the distance between the upper bracket 11 and the lower bracket 12 can be changed by axially moving together the brackets 11, 12. This means that at least one of the brackets 11, 12 is movable relative to the support means 4. At the in Fig. 2 As shown, the upper bracket 11 is movable in the direction of the lower bracket 12 attached to the column assembly 4.

The upper bracket 11 and the lower bracket 12 are interconnected by a plurality of rod elements in the form of bending bars 13. The bending rods 13 are hinged by means of each provided at their ends joint pieces 14 to the brackets 11, 12. For this purpose, the bending rods 13 are inserted and fixed to the joint pieces 14. The hinge pieces 14 are in turn pivotable relative to the supports 11, 12 carrying them, for example about a pivot 15 (FIG. Fig. 2c ).

Fig. 2a ) shows the support device 10 in the relaxation state. By moving the upper bracket 11 in the direction of the lower bracket 12 - for example by means of a cable - the distance between the upper bracket 11 and the lower bracket 12 is shortened, so that the bending bars 13 escape to the outside and in Fig. 2b ) take the form shown. Fig. 2b ) thus shows the state of stress in which the bending bars 13 from the inside against the in Fig. 2 not shown lampshade 2 press and put it in the in Fig. 1 force shown form.

The outward bending of the bending rods 13 is significantly facilitated by their articulated reception on the brackets 11, 12. For the merging of the brackets 11, 12 thus only a force is required, which is required for bending the bending rods 13.

Fig. 3 shows schematic detail views of the articulated attachment of a bending rod 13 on one of the brackets 11, 12. It shows Fig. 3a the arrangement in a sectional side view, while Fig. 3b the arrangement in plan view shows.

In this example, in particular the positive connection between the end of the bending rod 13 and attached to the end of the bending rod 13 joint piece 14 can be seen.

For this purpose, a groove-shaped recess 16 is formed in the joint piece 14, in which the end of the bending rod 13 is inserted.

The end of the bending rod 13 is angled at a kink 17 at an angle of 90 °. Thus, the bending rod 13 has a right-angled end.

The pivot pin 15 is inserted through the corresponding region of the holder 11, 12 and through the joint piece 14 such that it extends transversely to the groove-shaped recess 16. In this case, serving as a locking element pivot pin 15 undercuts the bent end of the bending rod 13 in the region of the kink 17, as in Fig. 3 shown. The pivot pin 15 locks in this way the bending rod 13 in the joint piece 14, so that the bending rod 13 can not be removed from the recess 16 of the joint piece 14. It a positive connection between the bending rod 13 and the joint piece 14 is effected.

At the same time, the pivot 15 serves to allow the link 14 to pivot smoothly relative to the upper bracket 11 and lower bracket 12, respectively. The pivot pin 15 thus also serves as a pivot axis for the joint piece 14.

Instead of the pivot 15, other components can be provided which ensures the pivotability of the joint piece 14.

With this arrangement, it is easily possible to achieve the pivotability of the joint piece 14, so that in the Fig. 2b and 2c shown deflection of the bending rod 13 can be achieved.

In the variant shown, the function of the positive locking of the bending rod 13 in the joint piece 14 on the one hand and the provision of a rotation axis for the joint piece 14 on the other hand in a structural element, namely in the pivot pin 15 is integrated. In another variant, it is possible to separate these functions, so that, for example, in addition to the axis of rotation for the joint piece 14 an independent locking element must be provided which locks the end of the bending rod 13 at the kink against removal form-fitting.

Furthermore, it is not absolutely necessary to perform the kink of the bending rod 13 with a bending angle of 90 °. Under certain circumstances, smaller or larger bending angles can be realized in order to achieve the positive connection between the bending rod 13 and the joint piece 14.

Fig. 4 shows in perspective partial view of the structure of the lower bracket 12. At the periphery of the lower bracket 12 a plurality of bending rods 13 (in the example shown eight bending rods 13 are arranged to effect a uniform clamping of the lampshade.

Moreover, in Fig. 4 a splinter protection 18 is shown, which surrounds the light bulb, not shown. The splinter guard 18 provides additional protection of the lamp located in its interior.

In the left part of the picture Fig. 4 a bending bar 13 with connected joint piece 14 and pivot 15 is shown. The pivot pin 15 is inserted into a receptacle 19 from above. The receptacle 19 thus encloses the pivot pin 15 at both ends, so that the pivot pin 15 can not slide out of the joint piece 14 axially.

To prevent falling out of the pivot 15 with the hinge piece 14 from the receptacle 19, a locking plate 20 can be screwed from above onto the lower bracket 12, as in the right part of FIG Fig. 4 recognizable. Thus, in each case the spaces between two joint pieces 14 are filled by locking plates 20. With the help of the locking plates 20, it is ensured that the hinge pieces 14 are reliably held with their pivot pin 15 in the receptacles 19 of the lower bracket 12.

The upper bracket 11 is constructed analogously. Also there are securing plates or securing elements are provided which secure the respective hinge pieces 14 in existing on the upper holder 11 recordings.

Fig. 5 shows in plan view the arrangement of Fig. 4 with locking plate 20 or without locking plate (in the right part of the picture).

The 6 and 7 show in detail the positions of the joint pieces 14 on the upper bracket 11 ( Fig. 6 ) and the lower bracket 12 (FIG. Fig. 7 ), each in the state of tension.

It is provided that the pivoting movement of the joint pieces 14 between the state of stress and the relaxation state is limited by a stop means, so that the joint pieces 14 are pivotable only over a certain pivot angle.

In Fig. 6 Thus, the situation is shown on the upper bracket 11.

In the relaxation state, not shown, the joint piece 14 and the bending rod 13 are pivoted downward, so that the bending rod 13 extends vertically downwards.

After reaching the in Fig. 6 shown stress state, the bending rod 13 extends in the horizontal direction, so it is pivoted together with the joint piece 14 by 90 °.

The pivoting movement is limited by a stop device 21, in which a rear surface of the joint piece 14 strikes against a stop surface 22 on the upper holder 11.

On the lower bracket 12 extends in Fig. 7 Bend bar shown in the relaxation state together with the joint piece 14 vertically upwards. After reaching the state of stress, the joint piece 14 is pivoted with the bending rod 13 only by an angle α of approximately 40 ° to the outside.

In the example shown, the swivel angle α is about 40 °. Of course, other angles are possible. For example, in the above based on Fig. 2b illustrated variant of the pivot angle 90 °, so that the bending rod 13 extends horizontally on the lower bracket 12, as the bending rod 13 on the upper bracket 11 in Fig. 6 , Other limit swivel angles, such as 80 °, 70 ° etc. are conceivable.

The limitation of the pivoting movement takes place with the aid of the stop device 21, which has a stop surface 23 on the lower holder and a stop lug 24 at the end of the joint piece 14. The stop lug 24 abuts against the abutment surface 23 of the lower holder 12, so that the in Fig. 7 shown pivot state of the joint piece 14 is achieved.

It may be particularly advantageous if the joint pieces 14 on the upper bracket 11 and the lower bracket 12 are identical, as in the 6 and 7 shown. In this way, identical hinge pieces on the upper bracket 11 and on the lower bracket 12 can be installed for the entire light device. However, the stop lug 24 is without function when installing the joint piece 14 on the upper bracket 11, such as Fig. 6 shows.

The limitation of the swivel angle, in particular on the lower holder, makes it possible to impose a specific shape on the light balloon, which can be advantageous for the light yield and distribution. Thus, it has been found that a substantially spherical or ellipsoidal light balloon can be disadvantageous because it has a relatively large outer surface in the upper region, which can make no amount to the light emission down. Advantageously, however, can, for example, in Fig. 1 be shown in which the light balloon 2 is closer to the shape of a hot air balloon, ie with a strongly horizontal area at the top, widely flared shoulders and a long, sloping area in the lower half. The downward part of the outer surface of the light balloon can be increased in this way compared to the upwardly directed, no contribution to the illumination of a job area, so that overall better illumination can be achieved.

Fig. 8 shows a variant for the attachment of a rod member 13 on a hinge piece 14th

The rod member 13 has at its end a loop-like kink 17 which surrounds the pivot pin 15.

The joint piece 14 is formed in this variant of a bent metal part. This has cost advantages, since it is no longer necessary, a groove (corresponding to the groove-shaped recess 16 of in Fig. 3 shown variant) in the joint piece 14 to be milled. For example, the sheet can be laser cut and then bent into shape.

The at the joint piece 14 in the Fig. 3 to 7 shown "rear wall", which fixes the rod member 13 together with the pivot pin 15, is omitted in the variant of Fig. 8 , In order nevertheless to obtain a sufficient fixation, the rod element 13 is bent at its end to a closed loop (kink 17), through which the hinge pin or pivot pin 15 is pushed.

Since the rod member serving as a bending bar 13 is subjected to pressure, it would be feared that the wire is deformed and the loop of the kink 17 opens. A integrally formed on the joint piece 14 bar 25 is to prevent this by preventing bending of the end of the existing wire rod member 13. The latch 25 may also be part of the bent sheet metal part, from which the joint piece 14 is formed.

It has been found in the described variants of the joint piece to be advantageous when the pivot pin 15 or bolt is pressed into the joint piece 14. The installation of the joint piece 14 in the clamping device (upper bracket 11, lower bracket 12) is facilitated because the pivot 15 can not slip.

Claims (10)

1. Portable lighting device, having

   - a lighting unit (1); and having

   - a supporting unit (4, 6) supporting the lighting unit (1) and extending in a longitudinal direction;

   wherein

   - the lighting unit (1) is designed to receive at least one lamp and comprises an at least partially light-permeable lamp shade (2) surrounding at least one part of the lamp;

   - a clamping device (11, 12, 13) is provided which can be fixed in a clamping state in which the clamping device clamps the lamp shade (2) in order to hold the lamp shade (2) in an open and usable state;

   - the clamping device (11, 12, 13) can be moved into a declamping state in which the clamping device does not clamp the lamp shade (2);

   - the clamping device comprises a plurality of elastic rod elements (13) which, in the clamping state, clamp the lamp shade (2);

   - a lower end of a rod element (13) is pivotably attached to a lower holder (12) and an upper end of the rod element (13) is pivotably attached to an upper holder (11) in each case;

   - in order to connect an end of a rod element (13) to the respective holder (11, 12) a hinge piece (14) is provided, to which the end is attached, wherein the hinge piece (14) can be pivoted relative to the holder (11, 12); and wherein

   - the distance between the lower holder (12) and the upper holder (11) can be changed, wherein the distance in the clamping state is less than in the declamping state;

   characterised in that

   - at least one end of a rod element (13) is held in a positive-locking manner in the respectively allocated hinge piece (14).
2. Portable lighting device as claimed in claim 1, characterised in that in order to achieve the positive-locking arrangement between the end of the rod element (13) and the hinge piece (14)

   - the rod element (13) is inserted into a recess (16) in the hinge piece (14) and comprises a knee (17) at the relevant end thereof; and that

   - a locking element (15) held in the hinge piece (14) is provided, through which the end of the rod element (13) is held in the hinge piece (14) in the region of the knee (17).
3. Portable lighting device as claimed in claim 1 or 2, characterised in that

   - the recess (16) is in the shape of a groove; and that

   - the locking element is a spigot (15) which passes through the hinge piece (14) and the groove-shaped recess (16) in such a way that the inserted rod element (13) is held in the recess (16) in a positive-locking manner.
4. Portable lighting device as claimed in any one of the preceding claims, characterised in that

   - the hinge piece (14) can pivot about an axis of rotation relative to the holder (11, 12) supporting the hinge piece (14) in each case; and that

   - the axis of rotation is formed by the spigot (15).
5. Portable lighting device as claimed in any one of the preceding claims, characterised in that

   - the spigot (15), during mounting thereof, can be pushed axially into the hinge piece (14); and that

   - a securing device (20) is provided on the respective holder (11, 12) in order to prevent, in a positive-locking manner, the spigot from being pushed out of the hinge piece.
6. Portable lighting device as claimed in any one of the preceding claims, characterised in that the pivot angle of the hinge piece (14) relative to the holder (11, 12) supporting the hinge piece (14) in each case is defined by a stop device (21) acting between the hinge piece (14) and the holder (11, 12).
7. Portable lighting device as claimed in any one of the preceding claims, characterised in that the pivot angle of a hinge piece (14) held on the upper holder (11) between the clamping state and the declamping state amounts to up to 90 degrees.
8. Portable lighting device as claimed in any one of the preceding claims, characterised in that the pivot angle of a hinge piece (14) held on the lower holder (12) between the clamping state and the declamping state amounts to up to 70 degrees, in particular up to 60 degrees, in particular up to 50 degrees, in particular up to 40 degrees.
9. Portable lighting device as claimed in any one of the preceding claims, characterised in that the supporting unit comprises a column unit (4) supporting the lighting unit (1) and extending in a longitudinal direction, and comprises a stand unit (6) supporting the column unit (4).
10. Portable lighting device as claimed in any one of the preceding claims, characterised in that the lower holder (12) and the upper holder (11) are disposed on the column unit (4) axially with respect to one another in the longitudinal direction.

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