| 摘要 |
A light includes an adjusting mechanism for focusing the light beam. The light includes a casing, a reflector mounted in the casing, and a piston housing mounted in the casing. A piston is slidably mounted in the piston housing and carries a bulb. A screw is rotatably mounted on the casing and is threadedly engaged with the piston. Rotation of the screw slides the piston and the bulb relative to the reflector to adjust the light beam. |
