My present invention relates to reflector lamp having a reflector and a light source which is adjustable relative to the reflector along the reflector axis.
A reflector lamp having a reflector and a light source which are movable relatively to one another has been described in Swiss Patent CH 14 69 87 A. The incandescent lamp is axially shiftable in the neck of the reflector housing in that a mount for the incandescent lamp is displaceable along the reflector axis. The connection between the lamp mounting and the neck of the reflector is formed by a pin guided in a curved track. By the swing of a lever connected to the lamp mount, the lamp mount is rotated about the axis and is axially displaced as its pin which is guided in the track to thereby focus the lamp.
In another Swiss Patent CH 22 11 09A, a reflector lamp is provided with a device for changing the focusing. By contrast with the previously described arrangement, the position of the reflector is altered rather than the position of the incandescent lamp. A cap carrying the reflector is rotatable on a housing part to which the lamp mount is connected and by rotation of the cap the reflector is displaced relative to the incandescent lamp along the axis.
It is the principal object of the present invention to provide a reflector lamp which allows focusing adjustment of the relative positions of the light source and the reflector but wherein the lamp is more versatile or flexible as to its applications.
Another object of the invention is to provide structural advantages over earlier lamp systems in which a lighted source is positioned adjustably relative to a reflector.
These objects are attained, in accordance with the invention with a reflector lamp comprising:
The other end of the stirrup is formed with a ring-shaped holder, the light source being provided in a rod-shaped body axially shiftable in the holder.
A screw connection can be provided between the holder and the body enabling axial displacement of the body relative to the reflective surface.
Thus according to the invention the light source is located outside of the reflector shell and is connected with the reflector by at least one stirrup, i.e. a bent member or a bend having a continuous arc between its opposite ends. Preferably the light source is provided in an elongated or rod-shaped body which is axially shiftable in a holding ring provided at the free end of the stirrup or bent arc. The light source itself is preferably a light emitting diode or a number of light emitting diodes.
When a screw thread arrangement is provided between the body and the holding ring, a stepless adjustment of the position of the light emitting diode in the rod shaped body and the reflector is possible along the axis. However, other types of connections between the body and the reflector which permit such movement are also possible. For example if the ring simply is frictionally slidable in a ring relative to the body, a positioning of the body relative to the reflector is also possible. The screw connection however has the advantages of controlled displacement of the body in the ring. A more exact positioning of the light source by a clamping arrangement in the ring is possible. Between the ring and between the ring and the body an indexing arrangement is likewise possible to provide stepped adjustment of the body in the ring.
In a further feature of the invention, the retaining ring itself is rotatable and/or pivotable about a hinge joint or the like on the free end of the stirrup arm so that apart from the axial positioning of the light emitting diode it is also possible to vary the orientation of the axis of the light emitting diode with respect to the reflector axis.
Preferably the reflector is a hollow mirror it can have on its outer shell a base from which two pin contacts which can interject and be inserted into a conventional contact socket to supply the lamp with electric current. The current conductors within the lamp can run through the stirrup to connect the light source with the reflector base. The reflector itself can be axially shiftable in a ring forming a holder for the reflector and that arrangement for displacement of the reflector can include a screwthread at the mouth of the reflector or at the socket over axial adjusting of the reflector.
To avoid light scattering in a preferred embodiment of the invention, a collecting lens is advantageously provided ahead of the light source.
The above and other objects, features, and advantages will become more readily apparent from the following description, reference being made to the accompanying drawing in which:
The illustrated reflector lamp 1 (
The reflector 2 can have a threaded sleeve 16 which threadedly engages a base 7 to allow adjustment of the reflector as has been diagrammatically shown by a dot-dash position thereof, slightly reduced in size at 17 simply to aglow an alternative axial position of the reflector to be clearly visible in the drawing. Alternatively, a ring 9 and the end 19 of the reflector around its opening can be threaded to enable axial displacement of the reflector relative to the stirrup 4.
The base 7, which is located centrally on the outer shell of the reflector 2 can have two pins 8 projecting therefrom to allow the reflector lamp 1 to be plugged into an electrical socket and supplied with electric current.
The reflector lamp has an extended segment 10 of the stirrup 4 secured to the ring 9 and carrying the base 7. The electric conductors which run to the light source 3 from the pins 8 can pass through the stirrup as shown at 18 and a loop of the conductors can run to the body 5 as shown at 13. A collecting lens 11 can be provided ahead of the light source 3 to eliminate stray light. Other light sources than a light emitting diode can be used in accordance with the invention and the contacts and conductors can be configured accordingly.
Number | Date | Country | Kind |
---|---|---|---|
202004006432.4 | Apr 2004 | DE | national |