Patent ID: 8182167

Claim:
A retractable lamp pen, comprising: a tubular pen body having a lower part that is at least partially transparent, an upper part, and a guiding slot axially disposed inside the upper part; a pen tip attachable to the lower part of the pen body; a refill disposed in the lower part of the pen body; a cap at least partially enclosing the upper part of the pen body; a conductive rotating slide disposed in the cap and having an outer surface, the conductive rotating slide further comprising: a conductive connector disposed in the rotating slide, and a conductive bar axially disposed on the outer surface of the rotating slide; a battery cartridge disposed in the upper part of the pen body and having an upper end and a lower end, the lower end having a mounting slot disposed axially along the lower end, and the upper end comprising: a helical end surface configured with a higher locating slot disposed at a highest point of the helical end surface, an auxiliary higher slot disposed adjacent to the higher locating slot, a stop protruding axially between the higher locating slot and the auxiliary higher locating slot, and a lower locating slot disposed at a lowest point of the helical end surface, and a guiding bar disposed axially on an outer surface of the battery cartridge and having a slot aligned with the mounting slot and extending through the guiding bar to the higher locating slot of the helical end surface, wherein the battery cartridge is adapted to hold a battery such that the conductive connector of the conductive rotating slide is adapted to be electrically connected to the battery; and a lamp that is disposed toward the lower end of the pen body, the lamp having a first lead and a second lead, the first lead adapted to be electrically connected to the battery, and the second lead being disposed in the mounting slot of the battery cartridge such that the second lead is fixedly connected through the guiding bar to the higher locating slot, wherein, in a first position of the rotating slide, the conductive bar engages the lower locating slot and the refill is retracted from within the pen tip, wherein rotating the rotating slide from the first position in a first direction causes the conductive bar to slide on the helical end surface until the conductive bar engages the higher locating slot and the guiding bar engages the guiding slot, thereby pushing the battery cartridge downward in the pen body so that the refill extends out of the pen tip, wherein the second lead of the lamp electrically connects to the conductive bar causing the lamp to illuminate, and wherein rotating the rotating slide from the first position in a second direction causes the conductive bar to slide on the helical end surface until the conductive bar engages the auxiliary higher locating slot and the guiding bar engages the guiding slot, thereby pushing the battery cartridge downward in the pen body so that the refill extends out of the pen tip and the second lead of the lamp is not electrically connected to the conductive bar.