WO2005095845A2

WO2005095845A2 - Portable lamp

Info

Publication number: WO2005095845A2
Application number: PCT/DE2005/000469
Authority: WO
Inventors: Jürgen Nölle
Original assignee: Noelle Juergen
Priority date: 2004-03-26
Filing date: 2005-03-15
Publication date: 2005-10-13
Also published as: JP2007522614A; JP4451883B2; JP4644297B2; DE112005001288A5; CN1938543A; DE202004004984U1; AU2005228934B2; NZ549919A; AU2005228934A1; PL1728023T3; DE502005007319D1; CN1938543B; WO2005095845A3; EP1728023B1; EP1728023A2; JP2010015999A; ATE431920T1

Abstract

The invention relates to a lamp comprising a folding screen which is at least partially provided with a reflective layer and has at least one mobile tensioning means for stretching the folding screen, said folding screen surrounding a luminant in the taut state and in the relaxed state. The inventive lamp comprises blocking means for preventing the screen from folding up when the luminant is hot. Furthermore, an optional tensioning aid and a blocking device can be provided in order to prevent against premature folding of the screen.

Description

Transportable light

The invention relates to a luminaire with a folding screen provided at least partially with a reflective layer, wherein one or more movable tensioning means are provided, which span the folding screen and the folding screen encloses a lighting means in the tensioned and in the relaxed state.

Transportable lights with a folding screen are known as hand or floor lights and are preferably used for temporary illumination of rooms or exposed areas. Depending on the intended use, it can be lights with low power or even lights up to 1,000 watts and more. The latter are preferably used in open-air areas for the illumination of, for example, a construction site, accident sites, large-scale damage situations or sports events.

From the European patent application EP 1 059 483, for example, a portable lamp is known in which a lampshade is clamped by a clamping mechanism. As a special feature of this design is to be emphasized that the phosphor screen encloses the lamp almost completely. When using these portable lights, especially when using high power lights, it has been found that these are occasionally and unintentionally turned on when connected to the electrical power supply in the folded state. The extreme heat generated by the high-power bulbs can damage the screen.

The invention has for its object to provide a portable light available, which has the benefits of the European patent application EP 1 059 483, but a device should be present, which prevents simultaneous relaxation of the clamping mechanism and warm phase of the bulb and the Possibility of easier clamping offers.

The object of the invention is achieved in that at least one device is provided which monitors the tensioned state of the folding screen and / or the temperature of the lighting means and that a tensioning aid is provided which changes the force required to tension the tensioning device, the tensioning means being a pulley block. a deflected rope or a Gear has. Further advantageous embodiments will become apparent from the dependent claims.

A safety device which prevents simultaneous relaxation of the tensioning mechanism and the warm phase of the illuminant ensures that the transportable luminaire can not be destroyed by heat damage, so that the luminaire is not switched on in the relaxed state of the folding screen or, after heating, a relaxation of the folding screen can be done. This results in the advantage that an inadvertently energized light bulb does not destroy the folding screen by heat.

Advantageously, a tensioning aid is provided especially for larger screens, which reduces the force required to tension the screen, wherein the clamping means may be a pulley, a deflected rope or a transmission. The tension help ensures that even a larger screen with relatively little effort can be stretched, which of course extends the manual tensioning path by the tensioning aid. A tensioning aid may be a pulley, with the mechanical clamping of the clamping means by deflected ropes. But it is also possible that the tensioning aid is a gear which drives a winding roll, which is itself connected to a first end of the clamping means and a pull rope or a cable wound, which is connected to a second end of the tensioning means. When the gear drives this winding roll, the path between the two clamping means shortened by the train of the winding roll and so the clamping means are tensioned. The gear facilitates the rotation of the winding roll, in which via a corresponding translation, the torque for rotating the winding roll is lowered. But it is also conceivable to use a rack and pinion gear for tensioning the clamping means.

Advantageously, the tensioning aid and the locking means are present in one unit. It is conceivable to provide both the tensioning aid and the locking means as individual or as separate mutually independent units within the luminaire. Advantageously, however, the tensioning aid and the locking means are combined in one unit. This has the advantage that the locking means can lock the clamping aid directly and a lock is not made via different paths within the lamp. As a preferred embodiment of a lamp with a tensioning aid and a locking means is a lamp which winds a drawstring or a cable, wherein the winding roll is connected to a first end of the clamping means and the drawstring or the cable to a second end of the clamping means and the roll through a torsion spring tensioned the drawstring or the cable during tensioning of the clamping means and thereby prevents unwinding of the drawstring or the cable by a locking means and allows the relaxation of the folding screen only by releasing the lock.

According to the invention, one of the elements of the clamping means in the relaxed state of the folding screen trigger an electrical breaker.

In a further advantageous embodiment of the invention, the tensioning aid is designed so that the ratio of tensioning path and manual triggering path over the above-mentioned embodiments reverses. As a result, the torque required for clamping the clamping means or the force required for clamping is increased. At the same time, the trip path is shortened. This embodiment is particularly useful for lights whose tensioning screen can be tensioned with even little effort. The advantage is that a manual pull rope has to be pulled a very short way. As a result, the pull rope does not hang down. A long, drooping Zlugseil could beat in the wind, it could be knotted with cables or otherwise hang down unfavorably and uncontrollably, which is felt for lights in practical use, especially in emergencies as very disadvantageous.

The safety device according to the invention may be a circuit breaker, which is arranged in the portable lamp, that this is triggered by a movable element of the clamping means in the relaxed state. Thus, the power supply of the lamp is interrupted in this case. Preferably, the breaker is designed so that it closes the circuit only in the fully tensioned state of the folding screen. This prevents the light bulb from destroying an incompletely tensioned screen when switched on prematurely. However, the device according to the invention is not limited to a power interruption, which prevents the light source can be turned on in the relaxed state of the folding screen, but may also be a device that by the light itself, for example by heating by the light source, prevents the Clamping means can be relaxed.

It has proven to be advantageous to use an element for locking the folding screen in the tensioned state, which locks the clamping means of the folding screen in the heated state solely by thermal expansion. It would also be possible, for example by an electromagnet, to lock the folding screen in the tensioned state, wherein the electromagnet locks the folding screen during the switch-on phase of the lighting means by means of a locking mechanism. An element which locks but only by thermal expansion, but has the advantage that this only then releases the lock when the lamp of the folding screen is cooled again. The cooling phase can take a few minutes and longer, possibly even 15 minutes and longer, during which cooling phase, no electricity is available, which could provide an electrical interlock. An element which locks the clamping means of the folding screen due to the thermal expansion thus has the advantage that it is independent of a power supply, for example after switching off the lighting means.

The locking device consists advantageously of two mutually encompassing elements, which are made of different materials, wherein the material of the first element has a different thermal expansion coefficient than the material of the second element. This ensures that in the device two elements which at ambient temperature, for example, outside temperature, can slide past each other, but in the heated state lock each other by the different thermal expansion coefficient. In this locked state, the two elements jam and only become detached after cooling has taken place.

In a first exemplary embodiment of the invention, the device consists of a piston sliding in a hollow cylinder, wherein the material of the piston has a higher thermal expansion coefficient than the material of the hollow cylinder. In this embodiment of the invention, the piston slides inside the Hohizylinders during tensioning of the folding screen along. If the piston is made of brass, for example, which has a higher coefficient of expansion has cient than stainless steel, and the hollow cylinder is made of stainless steel, so the brass piston, which slides along the stainless steel hollow cylinder, after heating no longer be moved in this, as the brass piston n jammed by expansion in the less expanding stainless steel hollow cylinder.

However, the device according to the invention is not limited to a piston which slides in a hollow cylinder. It is also possible that the heat-released locking device is a ring sliding on a rod. It has proved to be advantageous if the material of the ring has a lower coefficient of thermal expansion than the material of the rod, wherein the rod is locked in the sliding ring by heating.

Instead of a device which slides against each other or into one another, a locking device can be used, for example, at the same time as n ormales locking element locks the screen in the tensioned state, this locking element in turn stops by a locking element of a manual unlocking. It is for example possible that a bimetal, which is arranged in the cold state so that it does not protrude into the clamping path of a clamping means, after expansion or after deformation by heat protrudes into the clamping path of a locking element. Examples include here a locking mechanism, as it is found in umbrellas, wherein a bimetal is disposed within a rod in the clamping mechanism, which engages when heated in a latch bolt in the form of a recess of the central clamping element of the clamping mechanism. Only after the bimetal has cooled down again and thus indicates the cooling of the entire arrangement, it is possible to unlock the folding screen of the lamp according to the invention again and relax.

According to the invention, the locking element can be held stationary, wherein the locking element locks another manual locking element, so that the actual locking element can not be triggered manually. But it is also possible that the locking element according to the invention itself inhibits or blocks the movement of the clamping means.

According to the invention, the locking element can also be arranged on a movable clamping element, wherein the locking element in the heated

Condition protrudes into a corresponding latch trap. A latch bolt may in this case be a recess in an element of the clamping device, wherein the Bar latch is arranged so that when the locking element projects into the latch bolt, the clamping device can not be relaxed because the locking element prevents the lateral movement of two elements in the clamping device.

Advantageously, the lamp according to the invention has at least one locking means which locks the screen in the incompletely tensioned state against relaxation, but opens against further tension of the tensioning mechanism. This ensures that when manually cocking the screen, which may require a lot of effort, can be temporarily reduced to rest, the screen then not back, due to its own resilience, back again.

According to the invention, it is further provided that the device which monitors the tensioned state of the folding screen and / or the temperature of the lighting means can be seen independently of the tensioning aid, which changes the force required to tension the tensioning device, the tensioning means being a pulley block, a deflected rope or having a transmission.

The invention will be explained below with reference to the following figures.

It shows

1 is a transportable lamp according to the invention with clamping means,

2 shows a tensioning aid for the luminaire according to the invention,

3 shows an expanded tensioning aid for the luminaire according to the invention, FIG. 4 shows the expanded tensioning aid on FIG. 3 in a disassembled form,

Fig. 5 shows a bimetallic latch according to the invention in the heated and cooled state, Fig. 6 shows a further heat lock and

7 shows a breaker contact according to the invention. FIG. 1 shows a tensioning device 1 for a transportable lamp 500 according to the invention, which clamps a folding screen 300. The tensioning device 1 consists of a telescopic linkage 2 with inner telescopic rods 3, 3 'and outer, in Figure 1 transparent drawn telescopic sleeves 4, 4', which are arranged one inside the other. At a first end of the telescopic rods 3, 3 ', which are located within the telescopic sleeves 4, 4', there are each piston 5, 5 ', which are formed in this example of brass. The telescopic sleeves 4, 4 ', however, are made of stainless steel. The telescopic linkage 2 ends at its outer ends in each case in a clamping ring 6, 6 ', to which clamping means 9, 9' are fixed and are clamped by the clamping rings 6, 6 '. At the Teleskophülsen 4, 4 'is a lamp holder 7 is arranged, which receives the lamp 8, which is powered by a supply cable 10 with electrical power. In Figure 1, the clamping device 1 is shown for the transportable lamp according to the invention in the tensioned state, wherein the telescopic linkage 2 and the piston 5, 5 'therein are heated by the heat of the bulb 8. Due to a higher expansion coefficient of the pistons 5, 5 ', these expand more than the inner diameter of the telescopic sleeves 4, 4'. Since the pistons 5, 5 'expand more, they jam in the telescopic sleeves 4, 4'. In the cooled state, the pistons 5, 5 'pull together again and thus release the jamming between the telescopic sleeves 4, 4' and the pistons 5, 5 ', so that the telescopic rods 3, 3' again without resistance from the telescopic sleeves 4, 4 ' move out and thus the tensioning means 9, 9 'can relax. Upon relaxation of the tensioning device 1, the distance between the clamping device rings 6, 6 'and thus move the clamping means 9, 9' equatorial in the direction of the bulb 8 to form a cylindrical arrangement of the clamping means 9, so that the portable light can be transported to save space ,

The bulb holder 7 is mounted on a support rod 140 of a stand 141. A Zugseilpaar 150, 151 'is attached to the piston 5, 5' and guided by the telescopic sleeves 4, 4 '. A handle 150 connects the two traction cables 151, 151 'with each other. When the lamp is mounted on the stand 141, possibly at a height of a few meters, a manual pull on the pull handle 150 enables a tensioning of the tensioning device 1 in which the telescopic rods 3, 3 'are pulled into the telescopic sleeves 4, 4' and the upper clamping ring 6 Pull down in the direction of the arrow. As a result, the upper clamping ring 6 approaches the lower at the Leuchtmittelfas- solution secured clamping ring 6 'and thereby move the clamping means 9, 9' to the outside, as indicated by the arrows, which spans over the clamping means 9, 9 'projected phosphor screen.

FIG. 2 illustrates a tensioning aid 100, which also serves as a locking means for locking the tensioning device 1. In this specific embodiment of the tensioning aid 100, the tensioning aid 100 consists of a winding roller 101, around which the tension cable 151 'in FIG. 1 is wound and leaves it again above the winding roller 100 as a tension cable 105. The pull cable 105 is connected to the piston 5 'in FIG. The winding roller 101 has a brake drum 103. In the brake drum 103 is an intake brake 102, which prevents unwinding of the drawstring or the cable 105. If the tensioning aid 100 rotates in the counterclockwise direction in FIG. 2, unwinding in the clockwise direction is prevented by the inlet brake 102 because the inlet brake 102 locks within the brake drum 103. On the other hand, counterclockwise winding allows the inlet brake 102, so that the tensioning aid 100 can wind up the tension band or the cable 105 without resistance. For safe winding of the drawstring or the cable 105 is an optional torsion spring 104, which gives the clamping aid 100 so much torque that it winds the drawstring or the cable 105 against its own rigidity. The torsion spring 104 is not primarily intended to serve as a tensioning force relief, however, it is possible here to install such a strong torsion spring 104 that thereby the clamping of the tensioning device 1 in Figure 1 is facilitated. To release the tensioning aid 100, the inlet brake 102 is lifted off the brake drum 103 with the aid of the trigger 160, so that the tensioning aid 100 makes it possible to unwind the tensioning device 1 in FIG. 1 by unwinding the winding roller 101. For better accessibility can be attached to the trigger 160, not shown here thread. In an alternative embodiment of the intake brake this is constructed as a roller shutter, so that the intake brake 102 by briefly actuation of the winding roller 100 releases its lock and thereby the relaxation of the clamping means 9, 9 'in Figure 1 permits. In a particular embodiment of the inlet brake 102 does not completely solve this, but brakes a movement of the winding roll 100, so that a relaxation of the clamping means 9, 9 'does not happen suddenly, but slowly. As a result, accidents can be avoided.

In Figure 3, an expanded clamping aid 200 is shown, which in addition to the previously described tensioning aid 100, another winding roller 110 on a common Has axis 90, wherein the winding roller 110 has a reversed to the clamping aid 100 or the same winding direction. This additional roller 110 with wrong or same sense of winding serves to receive a pull cable 111, which can be actuated by a handle 112. If the pull rope 111 is pulled by the handle 112, then the winding roll 110 unwinds and at the same time the tensioning aid 100 wraps itself and thus shortens the path of the drawstring or of the cable 105 within the tensioning device 1 in FIG. 1. As a result, the tensioning device stretches 1 in Figure 1, because the path between the clamping rings 6, 6 'shortens.

In a particular embodiment of the invention can be provided that the roller 110 and the tensioning aid 100 are connected to each other in the extended tensioning aid 200 via a planetary gear 109, so that the roller 110 during unwinding rotates faster than the tensioning aid 100 during clamping. As a result, a gain in torque is achieved in the transmission of tension band 111 to tension band or cable 105, which means a greater workload, especially for large lamps with a correspondingly large tensioning device 1. Alternatively or in combination, the winding roller 110 may also have a square in its axial center, in which a crank 113 can be inserted for manual actuation of the crank. As when pulling on the drawstring 111 by the handle 112, it can be achieved by turning the crank 113 that the tensioning aid 100 winds the drawstring or the cable 105 and thereby tensions the tensioning device 1 in FIG.

In exactly opposite manner, the planetary gear 109 can also couple the tensioning aid 100 and the winding roller 110 in such a way that the pulling path of the tension band 111 is shortened relative to the pulling path of the tension band or cable 105. This type of coupling is suitable for luminaires whose tensioning device 1 can be tensioned with little force. By Zugwegverkürzung it is achieved that the drawstring 111 does not protrude so far from the tensioning aid 200 after tensioning and thus hangs down unfavorably from the lamp.

FIG. 4 shows the tensioning aid 200 from FIG. 3 in a disassembled form, a plan being given on the tensioning aid 100, on the open planetary gear 109 and on the winding roller 110. The tensioning aid 100 is identical to the tensioning aid from FIG. 2 except for its seat on the common axis with the planetary gear 109. The tensioning aid 100 is coupled to the sun gear 106 of the planetary gear 109 or meshes with a desired under or gear ratio not shown internal teeth on the rear side of the tensioning aid 100 with the three planet gears 107, 107 ', 107 "of the planetary gear 109. Accordingly, the winding roller 110 engages the sun gear 106 or the planetary gears 107, 107', 107" at. When pulling on the drawstring 111 by handle 112, the winding wheel 110 moves in the counterclockwise direction. If the winding roller is connected to the sun gear 106 of the planetary gear 109, then meshes the central sun gear 106 of the planetary gear 109 with the three planetary gears 107, 107 ', 107 ".. The planet gears 107, 107', 107" have a stationary axis on the housing This meshes the three planetary gears 107, 107 ', 107 "clockwise against the sun gear 106 and the three planetary gears 107, 107', 107" mesh against an internal toothing, not shown here, which on the rear side not shown here Clamping aid 100 is arranged. As a result, the tensioning aid 100 also rotates in the clockwise direction, so that the tension band or the cable 105 is wound up. Since the sun gear 106, which is connected to the winding roller 110 on the axle, has to rotate several times for the tension roller 100 to make one revolution, the torque which is required on the tensioning aid 100 for tensioning the tensioning device 1 in FIG. when transferred to the winding roll 110 is lowered. Is the winding roller 110 is not connected to the axis of the sun gear 106, but meshes with a not shown internal teeth on the back of the winding roller 110 to the three planetary gears 107, 107 ', 107 "and the clamping device 100 on the axis of the sun gear 106 of Connected to the planetary gear 109, so the torque ratio turns around, which leads to the advantages set out above.

FIG. 5 shows a locking arrangement 11 according to the invention for the telescopic linkage 2 of a portable luminaire from FIG. The locking arrangement 11 is arranged within a telescopic linkage 2, which here consists of a telescopic rod 12 and a telescopic sleeve 13. On a bolt axis 14, which is arranged within the telescopic rod 12, there is a bolt 15, which is pulled by a locking spring 16 into the interior of the telescopic rod 12. On a bimetallic bearing 17, a bimetal 18 is arranged, which curves in the heated state and thus pushes against the train of the locking spring 16, the bolt 15 to the outside. In the cocked position of the telescopic linkage 2, the bolt 15 can protrude from a recess 19 in the telescopic sleeve 13 and thus prevent the expansion of the telescopic linkage 2. In the right figure of Figure 2, the same locking assembly 11 is shown, but wherein the bimetal 18 in the cooled state has a different shape and thus the Bar spring 16 pulls the latch 15 in the interior of the telescopic rod 12. The bolt 15 thus clears the way for an expansion of the telescopic linkage 2, so that the inner telescopic rod 12 can slide within the telescopic sleeve 13.

FIG. 6 shows a further embodiment of the locking arrangement 11 for the telescopic rod 2 of a portable lamp from FIG. Instead of a bimetal, which pushes into a latch bolt, it is also possible to perform the locking arrangement by a brass cylinder 170, which is slipped over an inner telescopic rod 12 and slides in the telescopic sleeve 13. When heated, the brass cylinder 170 expands within the telescopic sleeve 13 and thus jammed, whereby the telescopic rod 12 can no longer slide within the telescopic sleeve 13. Upon cooling, the brass cylinder 170 retracts within the telescoping sleeve 13 and clears the path for sliding the telescoping sleeve 12 within the telescoping sleeve 13.

FIG. 7 shows a breaker arrangement 20 according to the invention for a telescopic linkage 2 of a portable luminaire. In the tensioned state, a recess 21 is arranged under a breaker contact 22, that a shoe 23 can connect a supply line 24 to form an electrical contact between contacts 25 and contact rod 26. The shoe 23 is disposed on a contact rod 26 and rotates about an axis 27 which is disposed in the breaker housing 28. A sliding shoe spring 29 presses the sliding block 23 in the direction of the recess 21 of the telescopic rod 12. If the telescopic linkage 2 is extended or retracted, the sliding block 23 is moved into the interior of the interrupter housing 28 by the displaced recess 21 and the contact between the contact rod 26 becomes and contact 25 is opened, so that the supply line 24 is electrically interrupted.

LIST OF REFERENCE NUMBERS

1 tensioning device

2 telescopic poles

3 telescopic pole

4 telescopic sleeve / hollow cylinder

5 pistons

6 clamping ring

7 bulb holder

8 bulbs

9 clamping means

10 supply cables

11 locking arrangement

12 telescopic pole

13 telescopic sleeve

14 bar axle

15 bars

16 latch spring

17 bimetal bearings

18 bimetal

19 recess

20 breaker arrangement

21 recess

22 breaker contact

23 sliding shoe

24 supply line

25 contact

26 contact rod

27 axis

28 breaker housing

29 Gleitschuhfeder

90 axis

100 clamping aid

101 winding roll

102 intake brake

103 brake drum 104 torsion spring

105 drawstring / cable

106 sun gear

107 planetary gear

107 'planetary gear

107 "planetary gear

108 mounting arrangement

109 planetary gear

110 winding roll

111 pull rope

112 handle

113 crank

140 tripod

141 stand rod

150 pull handle

151 pull rope

151 'pulling rope

160 triggers

161 brake shoe bearing

170 brass cylinders

200 clamping aid

300 folding screen

500 light

Claims

claims

1. luminaire (500) having a folding screen (300) provided at least partially with a reflective layer, wherein one or more movable clamping means (2, 9) are provided which span the folding screen (300) and the folding screen (300) comprises a lighting means (300) 8) in the tensioned and in the relaxed state, characterized in that at least one device (11, 20) is provided which monitors the tensioned state of the folding screen and / or the temperature of the lighting means (8) and that a tensioning aid (100 , 200) is provided, which changes the force required to tension the tensioning device (1), wherein the tensioning means (100, 200) comprises a pulley block (100), a deflected rope (105) or a gear (109).

Second lamp (500) with a at least partially provided with a reflective layer folding screen (300), wherein one or more movable clamping means (2, 9) are provided, which span the folding screen (300) and the folding screen (300) Illuminant (8) in the tensioned and in the relaxed state encloses, characterized in that a tensioning aid (100, 200) is provided which changes the force required to tension the tensioning device (1), wherein the tensioning means (100, 200) a pulley (100 ), a deflected cable (105) or a gear (109).

Luminaire (500) having a folding screen (300) provided at least partially with a reflective layer, wherein one or more movable clamping means (2, 9) are provided, which clamp the folding screen (300) and the folding screen (300). Screen (300) comprises a light source (8) in the tensioned and in the relaxed state, characterized in that at least one device (11, 20) is provided which monitors the tensioned state of the folding screen and / or the temperature of the light-emitting means (8).

4. Lamp according to claim 1 or 3, characterized in that at least one of the devices (11, 20) in response to the voltage state of the clamping device (1) interrupts an electrical power supply of the lighting means (8).

5. Luminaire according to claim 1, 3 or 4, characterized in that at least one of the devices (11, 20) in dependence on the temperature of the lighting means (8) the clamping means (2, 9) of the folding screen (300) arrested.

6. Lamp according to claim 5, characterized in that the device (1 1, 20) comprises an element (5, 5 ') which by thermal expansion, a clamping means element (3) of the clamping means (2, 9) locked.

7. Luminaire according to claim 1, 3, 5 or 6, characterized in that the device (11, 20) consists of two mutually encompassing elements (4, 4 ', 5, 5'), which are made of different materials, wherein the material of the first element (4, 4 ') another Thermal expansion coefficient than the second element (5, 5 ').

8. Lamp according to claim 7, characterized in that the device (11, 20) in a hollow cylinder (4, 4 ') sliding piston (5, 5'), wherein the material of the piston (5, 5 ') a higher thermal expansion coefficient than the material of the Hohizylinders (4, 4 ') has.

9. Lamp according to claim 7, characterized in that the device (11, 20) on a rod (3, 3 ') sliding ring.

10. Lamp according to claim 1, 3, 5 or 6, characterized in that at least one element (2) of the clamping means (9) by a locking element (15) is locked, wherein the locking element (15) by the thermal expansion in the otherwise free Clamping of the element (2) of the clamping means (9) protrudes.

11. Lamp according to claim 9, characterized in that the locking element (15) is held stationary and the movement clamping means (2, 9) inhibits or blocks.

12. Light according to claim 9, characterized in that the locking element (1 5) on the clamping element (2) is arranged and in the heated state in a corresponding latch bolt (19) protrudes.

13. Luminaire according to claim 4, characterized in that at least one element (21) of the clamping means (2, 9) in the relaxed state, an electrical breaker (20) triggers.

14. Luminaire according to one of claims 2 to 11, characterized in that at least one locking means (102) is provided, which locks the clamping device (1) in incomplete tensioned state.

15. Luminaire according to claim 1 or 2, characterized in that the tensioning aid (100, 200) and the locking means (102) are present in one unit.

16. Luminaire according to claim 15, characterized in that the tensioning aid (100, 200) has a winding roll (101), which winds a drawstring or a cable (105), wherein the winding roll (101) with a first end (6 '). the tensioning means (9, 9 ') is connected and the drawstring or the cable (105) is connected to a second end of the tensioning means (6) and the winding roll (101), stretched by a torsion spring (104), the drawstring or the cable (105) during tensioning of the tensioning means (9, 9 ') wound while thereby by locking means (102) prevents unintentional unwinding of the drawstring or the cable (105) and the relaxation of the tensioning device (1) only by releasing the locking means (102) ,

17. Luminaire according to claim 1, 2, 15 or 16, characterized in that the tensioning aid (200) consists of two arranged on an axis winding rollers (101, 110) which are interconnected via a planetary gear (109), wherein a first Tieback or cable (105) of the first winding roll (101) which is fixed to a first end (6 ') of the clamping means (9, 9'), with a second end (6) of the clamping means (9, 9 ') is attached and a second winding roll (110) has a drawstring (111) which, when unwinding via the planetary gear (109), drives the first winding roll (101) in a winding manner.

18. Luminaire according to one of claims 1, 3 or 15 to 17, characterized that the tensioning aid (200) shortens the manual tensioning path or lengthens the manual tensioning path while reducing the traction.

19. Luminaire according to one of claims 14 to 18, characterized in that the locking means (102) allows a continuous deceleration of the relaxation of the tensioning device (1).