Locking element holds screening cap in lighting unit
AssigneeKoninlijke Philips Electronics N.V.
InventorsCornelis Versluijs, Mark Josephus Lucien Maria Van Dommelen, Gert Jansen
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Abstract
The invention relates to a lighting unit having a concave reflector with an axis of symmetry and a light emission window bounded by a circumferential edge transverse to the axis, an elongate light source extending substantially along the axis of symmetry, which light source is accommodated in a holder opposite the light emission window, and an axially positioned cap, which cap partly surrounds the light source and forms an optical means to intercept unreflected light rays. According to the invention, the light source is surrounded by a sleeve with an end at the side of the light emission window, over which end the cap is positioned by way of a fixing element.
Claims7
A lighting unit comprising
- a concave reflector having an axis of symmetry and
- a light emission window bounded by a circumferential edge of the reflector that is transverse to said axis,
- an elongate body arranged substantially axially on the axis of symmetry and accommodated in a holder opposite the light emission window,
- an axially positioned cap serving as an optical screening means which surrounds the a light source at least partly so as to intercept unreflected light rays,
- wherein the light source is surrounded by a sleeve having an end facing the light emission window, and
- the cap is positioned over the sleeve adjacent said end by means of a locking element provided at the sleeve,
- wherein the cap is provided with a screening ring having a ring edge facing towards the light source, and the locking element is provided with a tag-shaped element that grips into the ring edge with spring force radially away from the light source.
Dependencies are inferred from the claim text.