EP1108182B1 - Lighting device - Google Patents

Abstract

A lighting device includes a spotlight and an inflatable sack detachably connected thereto and made of a material that is at least partially light-transmitting. The sack has a transparent light entrance orifice to couple to a light exit orifice of the spotlight. The light entrance orifice of the inflatable sack is defined by a transparent glass disk or a transparent foil, which along a circumferential edge is connected in an airtight manner to an edge of a corresponding orifice in the sack.

Description

The present invention relates to a lighting device, in particular a lighting device for Stage performances and film recordings.

Lighting equipment for theater and film must be one A variety of requirements are sufficient. In addition to a quick opening and closing Dismantling time should be often and quickly changing light and Enable color effects with different intensities. to Avoiding annoying noises, especially with original sound film recordings, they should also work as quietly as possible. They should also provide the softest possible light.

The lighting device shown in DE 195 29 648 A1 exists from a light source and one of the light exit openings the bag assigned to the light source by a fan is inflated. The sack consists of an almost airtight material that is at least partially permeable to light. Furthermore, the sack has a light entry opening, with which he assigned the light exit opening of the light source is. The sack can be used to change the lamp from a base that contains the light source.

Such lighting devices are generally for Not suitable for use in theater and film scenes because of one not sealed airtight against the light source Sackes an air escape after turning off the Fan is possible and thus causes annoying noises.

Accordingly, the present invention is based on the object to provide a lighting device that is distracting Avoids noise during use and over a long period of time sufficiently inflated and thus remains dimensionally stable.

This object is achieved by the features according to claim 1.

The essence of the present invention is an inflatable Sack associated with a headlight or the like. Lighting fixture and through which the light emerges to the outside shape that a light inlet opening of the bag through a transparent glass pane or a transparent film defined is that along its peripheral edge with the edge of a corresponding opening in the sack is connected airtight. On this way is avoided by an escape of air out of the bag after turning off a blower to inflate the Sack noises arise. Rather, the sack remains after being put down fan over a long period of time inflated and therefore dimensionally stable.

Because of the use of an inflatable bag, this occurs Light in an extremely soft and evenly illuminating the room Shape to the outside. For this, the sack consists of one at least partially translucent material.

If the sack is hermetically sealed on all sides, it must go with be provided with a valve through which the sack is inflatable is or through which the sack is deflated after use can be.

Further structural details of the lighting device according to the invention are presented in the dependent claims. Especially the training of the "light bag" should be emphasized in such a way that it essentially the Shape of a cylinder rod, a sphere, a hemisphere, one Has a cone or a truncated cone. When training in The shape of a cylinder rod can be 1 to 10 m long exhibit. The diameter is about 0.30 to 0.60 m.

The material for the sack is preferably made of air-impermeable Plastic film that can be textile reinforced.

It is also advantageous if the inside of the sack is at least partially, in particular has a light reflection zone on the end face, around a kind of glow stick with soft radial light emission receive.

Finally, if the blower is of particular importance to inflate the sack, especially the one that opens into the sack Air outlet of the blower a check valve, especially in The closing direction is assigned to the elastically biased valve, to prevent air from escaping from the sack after the To avoid blowers. This embodiment is particularly then important if original sound recordings are planned.

Regarding the material for the "light bag" it should also be mentioned that is also suitable for this, especially spinnaker cloth, which on the one hand the desired light transmission (Transparency) and also the required Strength. This material is not completely impermeable to air. If it is used, it must be ensured that the The fan remains in operation depending on the pressure, or according to a predetermined one Pressure drop within the sack restarted becomes. However, as already stated above, is suitable as Material for the "light bag" especially air impermeable Material, preferably plastic film, which reinforces textile is.

A material becomes "airtight" or "airtight" understood with a property that the manufactured from it Sack is inflatable and also without further supply of air or another gas, e.g. after switching off a fan, during a certain period of time, especially about 15-60 Minutes, remains inflated. In this way the lighting device according to the invention can be particularly good for original sound film recordings. Talking film sequences take an average of max. 2-5 minutes, with the Avoiding noise from the fan during this time should be switched off. This is with that described above Material possible as soon as a predetermined one is in the sack Has developed air pressure. The air pressure in the sack and so that the inflated state of the sack will preferably be through one inside the sack or on the outside surface of the sack attached pressure sensor monitors.

The light transmission or transparency of the light bag material can vary depending on the desired application; she depends in particular on the degree and / or the type of coloring of the Material. The light bag material preferably has a very high transparency.

The transparency should be as even as possible across the entire Surface of the light bag; i.e. preferably the Light bag about evenly white over the entire surface inked. But it can also have different patterns and / or colors to be special To achieve lighting effects. This can be especially useful be if one or more light bags themselves as decoration should serve, e.g. form part of a stage decoration.

As already mentioned, serves as a means of inflating the sack a given shape one with the headlight connected and / or at least with this partially integrated blower device.

• Fig. 1 eine nicht erfindungsgemäße Beleuchtungseinrichtung im schematischen Längsschnitt;
• Fig. 2 einen Teil der nicht erfindungsgemäßen Einrichtung gemäß Fig. 1, nämlich die Haltevorrichtung für den "Lichtsack" in perspektivischer Darstellung; und
• Fig. 3 eine Ausführungsform einer erfindungsgemäß ausgebildeten Beleuchtungseinrichtung in schematischer Seitenansicht.

A preferred embodiment of a lighting device according to the invention is explained below with reference to the accompanying drawing. Show it:

• 1 shows a lighting device not according to the invention in a schematic longitudinal section;
• FIG. 2 shows a part of the device according to FIG. 1 not according to the invention, namely the holding device for the “light bag” in a perspective view; and
• Fig. 3 shows an embodiment of a lighting device designed according to the invention in a schematic side view.

The lighting device 1 according to FIG. 1 comprises a headlight 2, a bag 3 and an intermediate Headlight and bag arranged holding device 4, the the headlight 2 is detachably connected, and to which the sack 3 is attached via a tether 5. The tether 5 is on the outside Circumference of the cylindrical holding device in the vicinity attached to the end of the sack. The holding device 4 has gas inlet openings 6 which can be connected to a blower are to get the air coming from the blower into the interior of the sack. At the end facing the headlight the holding device is a seal 12 made of a translucent and heat-resistant material. In particular it is foil material. Through this Seal 12 is to be prevented that the by Blown air in the bag 3 and holding device 4 formed Space trained pressure quickly decreases. The holding device is connected to the headlight 2 via a flange-like extension 8, pivoted about the bracket 9 rotatably attached to the headlight can be. The headlight is dashed on the recorded headlight bracket 10 pivotally attached. As already mentioned, the sack is designed like a cylinder rod. The longitudinal axis 11 is aligned with the longitudinal axis of the holding device 4 and the headlight 2. In particular, true the longitudinal axis 11 with the optical axis of the headlight 2 match. As already mentioned, the seal 12 is preferably from a transparent heat-resistant glass or a slide. A pressure relief valve can be located on the inner circumference of the holding device 7 be provided that to avoid excess pressure a downshift or a complete shutdown of the fan causes.

That trained on the front of the headlamp 2 Insert element 13 is used to hold color filters, screens, Shuttering, an additional optics or the like, as they usually in connection with such headlights Training certain effects can be used.

Fig. 2 shows a perspective view of a holding device 4 in connection with the headlight 2. Same components are with the same reference numerals used in Fig. 1 provided, which is why the corresponding description of this Components unnecessary.

It should also be noted that the bag 3 at least on the inside partially has a light reflection zone, in particular on the face opposite the headlight. In the Illumination device shown is the light reflection zone formed by a reflective film 14 on the inside the front of the bag 3 is arranged. That way the headlights are focused so that the distribution of light changed over the length of the tubular bag can be. Finally, it should be pointed out that the tether 5 can be a Velcro or adhesive tape, which with a corresponding or complementary Velcro or adhesive tape on the inside of the edge of the light bag facing the headlight 3 interacts. The tether can also be in the form of an outer Steel straps are designed like a "pipe clamp". The tether construction must be designed so that the Light bag 3 essentially airtight over the circumference at the Holding device 4 is held.

3 shows a lighting device according to the invention consisting of a headlight 2 and one with this releasably connected inflatable sack made from a for light at least partially permeable material, the sack 3 a highly transparent, i.e. transparent light entry opening 16, with which it has a light exit opening 15 of the Headlights 2 can be assigned. The light entry opening 16 of the bag 3 is covered by a transparent film or Glass plate defines the sitting along its peripheral edge 17 with the edge of a corresponding opening in the bag 3 airtight connected is. In this lighting device according to the invention, the sack 3 is a closed unit on all sides is similar to an "air mattress". A valve 18 must of course be used to inflate the sack be provided. The sack can be used with this valve after use be vented again.

To connect the bag 3 to the headlight 2 is on the Light entry side or around the light entry opening 16 a connecting cylinder 21 arranged on the inside of a Holding means in the form of a Velcro tape 19 is provided. This acts with one arranged on the outer circumference of the headlight opening complementary Velcro 20 together. For this purpose the connecting cylinder via the complementary headlight opening are pushed until the Velcro strips 19, 20 one above the other lie. In addition, an outer tether in the area the connection point around the connecting cylinder 21 and be tightened.

In this regard, it is a construction that is arbitrary is variable. It is only important that the inflated air bag 3 detachably connected to the headlight outlet opening can be such that no light between the airbag and Headlight outlet opening emerges laterally. So it should be assured that all the light through the clear Light entry opening 16 enters the airbag 3.

As already explained above, the lighting device is not according to the invention according to FIGS. 1 and 2, the blower for inflating the bag 3, in particular the blower air outlet opening into the bag a check valve, especially one in the closing direction Resiliently biased flap assigned to escape Avoid air from the sack 3 after turning off the blower. This lighting device ensures that original sound film recordings that the sack also up to 60 minutes without a blower inflated sufficiently and thus remains dimensionally stable.

This problem occurs in the lighting device according to the invention according to FIG. 3 not on; there the bag is inflated exclusively through valve 18 corresponding to an "air mattress" valve. Of course, the material used for the sack must be appropriate be airtight. The same applies to the transparent Covering the light entry opening 16.

The circumference of the holding device 4 can either be circular or be hexagonal or octagonal. The lighting device according to the invention 3 is particularly simple in terms of production technology. About that In addition, a high level can also be achieved with this lighting device Tightness between the peripheral edge of the airbag 3 and the peripheral edge of the holding device 4, even if if the peripheral edge of the airbag 3 is circular. It must care should be taken that the circumferential length of the airbag and Holding device are the same.

LIST OF REFERENCE NUMBERS

1

lighting device

2

headlights

3

bag

4

holder

5

tether

6

Air or gas supply lines

7

pressure sensor

8th

annular flange

9

headband

10

- headlight bracket

11

longitudinal axis

12

seal

13

insert element

14

Reflective film

15

Light opening

16

Light inlet opening

17

circumferential edge

18

Valve

19

holding means

20

Complementary holding devices

21

connection cylinder

Claims (10)

1. Lighting means (1) comprised of a film or stage spotlight (2) and an inflatable bag (3) detachably connected with same of a material at least in part permeable for light, with the bag (3) comprising a transparent light entrance opening (16), by means of which said bag may be allocated to a light exit opening (15) of the spotlight (2),
   characterized in that
   said light entrance opening (16) of the inflatable bag (3) is defined by a transparent glass disk or a transparent film, which is connected hermetically sealed along its peripheral edge (17) with the edge of a corresponding opening in the bag (3).
2. Lighting means according to claim 1,
   characterized in that
   said bag (3) is hermetically sealed on all sides and is provided with a valve (18) through which the bag (3) can be inflated or deflated after use.
3. Lighting means according to claim 1 or 2,
   characterized in that
   said inflatable bag (3), in the area of the light entrance opening (16) comprises means (19), by means of which it can be attached to the light exit opening (15) of the spotlight (2), with said attachment means (19) being able to have complementary attachment means (20) allocated on the spotlight (2).
4. Lighting means according to any one of claims 1 through 3,
   characterized in that
   the means for connecting said spotlight (2) and bag (3) is a bag-holding device connected with said spotlight (2) and/or integrated in same, with which the spotlight (2) and bag (3) can be detachably connected.
5. Lighting means according to any one of claims 1 through 4,
   characterized in that
   said bag (3), in the inflated state, essentially has the shape of a cylinder rod, a sphere, a semi-sphere, a cone or a truncated cone.
6. Lighting means according to any one of claims 1 through 5,
   characterized in that
   said bag (3) consists of a textile tissue or an air-impermeable film of a synthetic material, which, if the case may be, can have a textile reinforcement.
7. Lighting means according to any one of claims 1 through 6,
   characterized in that
   said bag-holding device is detachably connected with the spotlight (2).
8. Lighting means according to any one of claims 1 through 7,
   characterized in that
   said bag (3) on its inside comprises at least in part a light reflecting zone (14), in particular on that side of the bag (3) situated opposite the spotlight light entrance opening.
9. Lighting means according to any one of claims 5 through 8,
   characterized in that
   a pressure sensor (7) is provided for determining a predetermined air pressure within the bag (3), which is in such a manner in connection with the blower means that the blower means is switched down or out upon reaching said predetermined air pressure.
10. Lighting means according to any one of claims 5 through 9,
    characterized in that
    to said blower means for inflating the bag (3), in particular to the air outlet of the blower means leading into the bag, is associated a non-return valve, in particular a valve elastically pre-stressed in the closing direction, so as to prevent air from escaping from the bag (3) through the blower means after stopping the blower means.

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