Patent Application
20100157604
The present invention relates to a stage light fixture and to a light fixture assembly comprising said stage light fixture.
A stage light fixture of the known type comprises a main body extending along a longitudinal axis, a light source arranged inside the main body at a first end of the main body and suitable to emit a light beam substantially along the axis, and an objective lens arranged at a second end of the main body.
In the show business field, stage light fixtures are often used in combination with outer filters adapted to color the light beam which crosses the objective lens of the light fixture. These outer filters are substantially colored sheets, generally made of plastic, and are often preferred to the colored filters arranged inside the light fixture because of their particular properties. Indeed, in outer filters, the color is distributed in a more uniform manner than in inner filters, and furthermore the available color range for outer filters is much broader than the range of colors made available for inner filters.
However, these outer filters are fixed to the stage light by generally not very reliable fastening means. Indeed, the filter sometimes detaches from the light fixture during fast movements imparted to the light fixture for stage purposes.
The most used fastening means in this field is common adhesive tape, which does not always ensure a firm fastening and furthermore requires rather long application times.
It is an object of the present invention to provide a stage light fixture which is free from the drawbacks of the prior art illustrated herein; in particular, it is an object of the invention to provide a stage light fixture to which the outer filters available on the market may be simply, rapidly and reliably fixed.
In accordance with these objects, the present invention relates to a stage light fixture comprising a main body extending along a longitudinal axis and provided with an outer surface; a light source arranged inside the main body at a first end of the main body and suitable to emit a light beam substantially along the axis; and an objective lens arranged at a second end of the main body; the light fixture being characterized in that the main body comprises a plurality of inserts to fix to the outer surface, by means of a magnetic coupling, a filter suitable to intercept the light beam which crosses the objective lens; the inserts being made of a magnetic material and/or of a metallic material suitable to be attracted by a magnetic material.
It is a further object of the invention to provide a simple, reliable light fixture assembly.
In accordance with these objects, the present invention relates to a light fixture assembly comprising a light fixture as claimed in the attached claims, a filter and magnetic coupling means to fix the filter to the outer surface of the main body so that the filter intercepts the light beam which crosses the objective lens.
Further features and advantages of the present invention will be apparent from the following description of a non-limiting embodiment thereof, with reference to the figures in the accompanying drawings, in which:
In
The light fixture 2 comprises a main body 6 being elongated in shape and extending along a longitudinal axis A, a light source 7 suitable to emit a light beam substantially along the axis A, an objective lens 9, and optical assemblies 10 for adjusting the light beam (diagrammatically shown in the figure as a single element).
The main body 6 has a first end 11 and a second end 12 opposite to the first end 11 along the axis A and comprises an inner frame 14 and an outer shell 15.
The inner frame 14 supports the light source 7 at the first end 11 and supports the optical assemblies 10 so that the optical assemblies 10 are arranged between the light source 7 and the objective lens 9 to intercept the light beam.
The outer shell 15 defines an outer surface 16 (best seen in
Base 17 is suitable to contain the inner frame 14, the light source 7 and the optical assemblies 10.
Flange 18 may be coupled to the base 17, e.g. by means of screws, and is suitable to support the objective lens 9 at the second end 12, so that the objective lens 9 is substantially centered on the axis A.
With reference to
The inner ring 20 substantially extends about the axis A and is provided with an annular edge 22 substantially orthogonal to the axis A, which defines an inner annular face 24 suitable to face in use the base 17, and an outer annular face (not shown in the accompanying drawings) suitable to be arranged, in use, in contact with filter 3.
The inserts 21 are fixed to the inner annular face 24 and are substantially arranged equally spaced from one another along the inner annular face 24.
In the non-limiting example described and illustrated herein, there are four inserts 21 fixed by means of adhesive to the inner annular face 24.
Points are preferably marked on the outer annular face, at which the inserts 21 are arranged to facilitate the operations for fixing filter 3, in use.
The inserts 21 are made of magnetic material or metallic material suitable to be attracted by a magnetic material.
The term “magnetic material” means hereinafter a material capable of generating a magnetic field.
In the non-limiting example described and illustrated herein, the inserts are cylinders made of magnetic material.
With reference to
In the non-limiting example described and illustrated herein, the filter 3 is a colored sheet made of plastic material, e.g. a polymeric gel.
In use, filter 3 is suitable to be coupled to the outer surface 16 of the outer shell 15 by means of magnetic coupling means 4 so as to intercept the light beam which crosses the objective lens 9. In particular, filter 3 is suitable to be coupled with the flange 18 of the outer shell 15.
The magnetic coupling means 4 comprise a plurality of coupling elements 23, each of which is suitable to magnetically interact with a respective insert 21. Indeed, the coupling elements 23 are made of a material attracted by the material of which the inserts 21 are made.
In particular, the coupling elements 23 are made of magnetic material attracted by the magnetic material of the respective inserts 21 or of a metallic material attracted by the magnetic material of the respective inserts 21 when the inserts 21 are made of magnetic material; otherwise, the coupling elements 23 are made of magnetic material which attracts the metallic material of the respective inserts 21 when the inserts 21 are made of metallic material.
In the non-limiting example described and illustrated herein, the coupling elements 23 are plates made of magnetic material attracted by the magnetic material of which the inserts 21 are made. In a variant of the present invention, the coupling elements 23 are plates made of metallic material attracted by the magnetic material of which the inserts 21 are made, e.g. a material having a magnetic permeability, such as iron.
Filter 3 is fixed by arranging the filter 3 substantially in contact with the outer annular face of the flange 18 and approaching the coupling elements 23 to the flange 18 at the marked points on the outer annular face of flange 18, until the magnetic attraction action between the coupling elements 23 and the respective inserts 21 does not occur.
The presence of the inserts 21 advantageously allows to rapidly couple filter 3 to the light fixture 2 and ensures that such a coupling is firm even when moving the light fixture 2.
Moreover, the presence of the inserts 21 allows to possibly replace the filter 3 in a simple, rapid manner, with evident advantages from the stage design point of view.
It is finally apparent that changes and variations may be made to the stage light fixture 2 and to the light fixture assembly 1 described herein, without departing from the scope of the appended claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| MI2008A 002234 | Dec 2008 | IT | national |
