| 摘要 |
A toy gun includes two discs secured in a gun barrel. A roller is rotatably supported between the discs and has three helical grooves. Three tubes are slidably extended through one of the discs and are engaged with the helical grooves of the roller such that the tubes are moved in reciprocating action when the roller is rotated. Three light bulbs are disposed in the tubes, and the tubes are made of transparent materials having different colors such that different colors are generated through the tubes when the light bulbs are energized.
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