Illumination – Elongated source light unit or support – Plural sources or supports therefor
Reexamination Certificate
2000-05-26
2001-10-02
Cariaso, Alan (Department: 2875)
Illumination
Elongated source light unit or support
Plural sources or supports therefor
C362S576000, C362S559000, C362S035000, C362S217060, C362S223000
Reexamination Certificate
active
06296372
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a light fitting, having a plate-like light guide, into which the light from a light source is irradiated, which light source is located at a narrow side of the light guide, and which light guide has on at least a part region of its one broad side a light output for the light radiating out. The light output may be formed by a light tapping layer having a microstructure.
2. Description of the Related Art
Such a light fitting is known from WO 96/21122 A1. In this publication, the light fitting is primarily described with regard to the tapping of light.
A light fitting of this kind distinguishes itself through a low structural height. Further, by means of special configurations of the layer tapping the light from the light guide there can be attained specific properties of the light, for example an non-dazzle emission of light, so that special anti-dazzle devices, such as e.g. rasters, are not needed, and which likewise contributes to reduction of the structural height. From DE 195 41 971 A1 there is known a vertically directed illuminated table, which has an edge-illuminated lighting plate which is held between two webs directed substantially perpendicularly to the two side faces of the lighting plate.
SUMMARY OF THE INVENTION
A object of the invention is to find, whilst maintaining the flat manner of construction, a simple manner of construction for a holder of the light guide and of the reflector arrangement on a light fitting carrier. This object is achieved by means of a ceiling light fitting having a horizontally directed light guide from at least a portion of a broad side of which room illumination light is irradiated. The light fitting includes a light fitting carrier which has at least two elements lying opposite one another, for holding the light guide. These elements are arranged on carrier parts and are engaged below the light guide. The light source has a reflector associated therewith and the reflector is arranged so that it at least partially surrounds the light source in a free region neighboring the light guide.
With the configuration in accordance with the invention, the light fitting carrier and the reflector arrangement form a constructional unit, in which the light guide—whilst maintaining an advantageous intake and emission of light—can be held in a simple and reliable manner. Thereby it is particularly advantageous to arrange the carrier parts, having the carrier elements for holding the light guide, at one and the same height with the light guide, whereby not only is a low construction provided, but whereby also an optimum emission of the light from the light guide and room illumination is attained.
Further, it is the object of the invention to so configure the light fitting of the kind concerned that the reflector arrangement or a reflector can be readily installed or disinstalled on the light fitting carrier, whilst maintaining a simple configuration.
In accordance with a further development of the invention, for the connection of the reflector arrangement or of the reflector with the light fitting carrier there is provided at least one plug-in connector which can be realised in a simple and compact construction and can be integrated into the light fitting construction, and furthermore allows a simple and rapid installation or dis-installation. For securing the plug-in fitting against an unintended release, there is provided a security device. Here, a securing screw may be involved, which is screwed into the wall of the plug-in recess from the outside and is positionable with the plug-in pin in the plug-in recess. The security device may also be formed by means of a clamping device, which includes a stiff fitting for the plug-in pin in the plug-in recess in the end region of its plug-in movement.
The light fittings in accordance with the invention distinguish themselves in that they fulfil the mechanical, lighting and aesthetic demands placed upon a light fitting of the kind concerned.
There are also described and claimed other features which contribute to a simple attractive construction, and make possible a hidden arrangement of associated operating means including associated electrical lines, simplify and improve the holding of the light guide, and furthermore improve the intake of the light emitted from the light source into the light guide, if applicable whilst maintaining an indirect illumination.
REFERENCES:
patent: 5022728 (1991-06-01), Fandrich
patent: 5897201 (1999-04-01), Simon
patent: 19541971A (1997-05-01), None
patent: 2161638A (1986-01-01), None
patent: 2241056A (1991-08-01), None
patent: WO 8902606A (1989-03-01), None
patent: WO 96/21122 (1996-07-01), None
Cariaso Alan
DelGizzi Ronald E.
Fitzpatrick ,Cella, Harper & Scinto
Zumtobel Staff GmbH
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