| 摘要 |
A flashlight has a lens (14) or lenses (526,302; 606, 604, 602) moveable relative to one or more LED (50, 306) or other light source. The beam of light provided by the LED can be focused and provides a uniform light pattern across the range of focus. The lenses are supported on a front housing section (16) and the LED is supported on a back housing section (20) threaded onto the front housing section. Twisting the front housing section closes a switch (60) providing power to the LED, to turn the flashlight on. One or more circuit modules (15, 254, 314) within the flashlight provides various operating modes including an automatic shut-off timer, to preserve battery life, a dimmer controlled by turning an end cap, a blinking function, and/or a current control function to provide maximum brightness regardless of battery condition. |
