| 摘要 |
A lighting assembly ( 10 ) is adjustable between flood and spot lighting conditions for selectively illuminating an interior passenger compartment in a motor vehicle. The assembly ( 10 ) includes a housing ( 16 ) which clamps to a supporting member, such as a headliner ( 12 ), via a sleeve ( 18 ) interacting with a rotary cam lock ( 22 ). An LED light source ( 26 ) is orbitally supported within the housing ( 16 ) for projecting light in a directionally adjustable manner. A lens ( 50 ) is disposed in the light path ( 28 ) and is moveable between an extended spot position for task lighting and a retracted flood position for general illumination within the interior compartment. A switch ( 74 ) is responsive to movement of the lens ( 50 ) into its spot position for automatically energizing the LED ( 30 ). The switch ( 74 ) opens, thus de-energizing the LED ( 30 ) when the lens ( 50 ) is returned to its flood condition. A lighting control circuit ( 78, 78 ') is responsive to an override signal, such as from a door switch ( 80, 80 '), for independently activating the light source ( 26 ) when the lens ( 50 ) is in its flood position. The light source ( 26 ) is supported for orbital movement within the housing ( 16 ) by a gimbal mechanism which includes an inner gimbal ( 38 ) carried in a cross ( 40 ). Pintals ( 42, 44 ) establish intersecting perpendicular axis (A,B) to accomplish the orbital movement. A latch mechanism ( 64 ) cooperates with leaf springs ( 62 ) by controlling movement of the lens ( 50 ) between its flood and spot conditions by a repeated push impulse applied by the finger of an operator. The switch ( 74 ) is incorporated into the leaf springs ( 62 ).
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