Lighting arrangement for the ignition lock of a motor vehicle
View Patent ↗A lighting arrangement for the ignition lock of a motor vehicle has a light ring comprising a translucent material and fitted on to the housing of an engine immobilizer of the vehicle. Light-guide extensions in leg form lead to the light ring from light emitting diodes on the circuit board of the immobilizer. Preferably arranged at the side of the light ring which is towards the ignition lock are notches for producing a light-dark pattern, wherein the notch depth and position can vary for the purposes of producing a uniform emission of light.
1. A lighting arrangement for an ignition lock of a motor vehicle including
an electronic immobilizer having a housing;
a light ring which comprises a light-guiding material and in use surrounds the ignition lock, the light ring defining a rear side;
at least one light source disposed in the housing of the electronic immobilizer; and
a first light-guide extension communicating the light source with the light ring, wherein the first light-guide extension opens substantially tangentially to the light ring.
2. The lighting arrangement according to claim 1 , wherein the first light-guide extension includes a leg.
3. The lighting arrangement according to claim 2 , wherein the leg is of circular cross-section.
4. The lighting arrangement according to claim 2 , wherein the leg is of oval cross-section.
5. The lighting arrangement according to claim 2 , wherein the leg of the light-guide extension has a primary leg and a secondary leg, the secondary leg branching off the primary leg in a proximity of the light ring.
6. The lighting arrangement according to claim 5 , wherein the secondary leg opens into the light ring in the opposite direction to the primary leg.
7. The lighting arrangement according to claim 2 , including a second light-guide extension.
8. The lighting arrangement according to claim 2 , wherein the light ring has notches on the rear side for producing a light-dark pattern.
9. The lighting arrangement according to claim 8 , wherein at least one of the depth and the position of the notches varies according to the distribution of light strength along the light ring to afford a substantially uniform emission of light along the light ring.