Lamp, in particular, lounge, table or pocket lamp

• US 20030095408A1
• Filed: 10/22/2002
• Published: 05/22/2003
• Est. Priority Date: 07/03/2000
• Status: Active Grant

• Current Assignee: Zweibruder Optoelectronics GmbH & Co. KG
• Original Assignee: Zweibruder Optoelectronics GmbH
• Inventors: Opolka, Harald
• Granted Patent: US 6,893,143 B2
• Time in Patent Office: Days
• US Class Current: 362/241
• CPC Class Codes: F21L 4/027 the light sources being a LED
• CPC Class Codes: F21S 6/002 Table lamps, e.g. for ambient lighting
• CPC Class Codes: F21V 21/0885 for portable lighting devices
• CPC Class Codes: F21V 23/0414 specially adapted to be used with portable lighting devices
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

The invention relates to a lamp, in particular, a lounge, table, or pocket lamp with a lamp head (13), comprising a light source (16), arranged in a hollow reflector (17), which extends with the plug-in, or terminal contacts thereof, through an opening in the rear of the hollow reflector. According to the invention, the light source is a light diode (16). The opening in the hollow reflector (17) lies very close to the outline of the cover of said light diode, such that the light diode is centralised and longitudinally fixed in position, relative to said hollow reflector. The hollow reflector has a reflector piece, surrounding the light emitting chip of the light diode, which is at least essentially conical in shape.

Claims

1. A lamp, especially a living room, table or pocket lamp with a lamp head (13) which has a light source (16) disposed in a hollow reflector (17) and whose plug and/or terminal contacts project rearwardly through a passage of the hollow reflector, characterized in that the light source is a light-emitting diode (16), that the passage in the hollow reflector is of the same size as the peripheral contour of the light-emitting diode (16) within a slight play or tolerance, that the position of the hollow reflector is singularly determined by its outer shell shape and the configuration of the lamp head inner surface and is also centered and positioned along its longitudinal axis thereby and the hollow reflector surrounds the light-emitting chip of the light-emitting diode in a ring with at least a substantially conically-shaped reflector part (18).

2. The lamp according to claim 1, characterized in that the hollow reflector (17) is formed as a body which has a cylindrically-shaped stepped outer shell surface which is of the same diameter within a limited play or tolerance as the stepped cylindrically shaped lamp head inner surface, whereby the hollow reflector is secured against falling out by a ring-shaped step (24) of the cylinder shell part against a correspondingly formed step in the lamp head inner surface.

3. The lamp according to claim 1, characterized in that a conically-shaped outer surface which sealingly engages annularly on an identically-shaped inner conical surface of the lamp head, within a limited play or tolerance.

4. The lamp according to one of claims 1 to 3, characterized in that the conically-shaped reflector part (18) forms an angle of 10°

to 45°

, preferably 30°

with the common hollow reflector longitudinal axis and lamp housing longitudinal axis.

5. The lamp according to claim 4, characterized in that the hollow reflector, aside from the first reflector part (18) ringing the light-emitting chip of the light-emitting diode has in the region of larger conical diameter, a second conically-shaped shell part (20) parallel thereto.

6. The lamp according to claim 5, characterized in that between the first and second conically-shed shell parts (18, 20) a cylindrically-shaped shell part (19) is arranged, whereby the hollow reflector projects only limitedly beyond the front diode glass end and/or the light-emitting diode is arranged at least 0.5 cm behind the open end of the lamp head (16).

7. The lamp according to one of claims 1 to 6, characterized in that the passage in the hollow reflector (17) has at its bottom rear side a ring-shaped enlargement for receiving the lower diode glass body base step (21).

8. The lamp according to one of claims 1 to 7, characterized in that the hollow reflector (17) has on its bottom periphery, detent means (41) which engages the diode bottom from the rear.

9. The lamp according to one of claims 1 to 8, characterized in that a plurality of light-emitting diodes are disposed in the lamp head, whereby each light-emitting diode (16) has an individual reflector (17) associated therewith within which the diode is centered and that the number of reflectors is arranged in a honeycomb shape and are integrated to a one-piece body with outer shells matched to the lamp head inner shell.

10. The lamp according to claim 9, characterized in that the one-piece body has a shell profile that is matched to the inner shell of the lamp head.

11. The lamp according to one of claims 8 or 9, characterized in that at least one reflector (17), preferably a plurality of reflectors, is swingable about an angle up to 45°

, preferably up to 30°

.

12. The lamp according to one of claims 9 to 11, characterized in that the individual reflectors (17) are arranged one next to the other along a line, an arc, a circle, or rotationally symmetrical about a central point.

13. The lamp according to one of claims 1 to 12, characterized in that the lamp body is of bar-shape configuration whereby preferably the bar-shaped lamp body (10) is fitted into a ring-shaped or cylinder-shaped mounting (40) of a lamp shade (39).

14. The lamp according to one of claims 1 to 13, characterized in that the light-emitting diode glass body is provided with a coating in which luminescent particles, especially of fluorescent or phosphorescent material embedded in plastic (acrylic), which preferably is applied by spraying or immersion in a corresponding solvent.

15. The lamp according to claim 14, characterized in that the light-emitting diode or the light-emitting diodes are a xenon diode or xenon diodes.

16. The lamp according to one of claims 1 to 8, characterized in that the lamp head (13) has a front cover which is of the configuration of a collecting lens.

17. The lamp according to one of claims 1 to 8, characterized in that on the periphery of the lamp housing there is a pressure or slide switch (15) which can be protected against unwanted actuation by covering it with a clip (30) which is mounted on the lamp housing shell for rotation or sliding movement or releasably to uncover the press or slide switch (15) to hold down the press switch.