| 摘要 |
A manually generatable lighting device utilizes a pull cord, which is mechanically linked to a motor, to charge a power pack for on-demand illumination of at least one light-emitting diode. The lighting device employs circuitry which enables its use as continuous light source, a night light which illuminates automatically in low-light conditions, or an emergency light which illuminates automatically during power failure. The lighting device includes a power plug and may be stored or illuminated portably or as plugged into a power outlet. Built-in charging circuitry allows electrical recharging of the power pack to a maximum of 4 hours of usage, although the pull cord mechanism extends the possible usage time because it allows the power pack to be manually recharged at any time regardless of the level of stored charge available in the power pack. The lighting device requires only minimal effort to achieve maximum brightness, and two complete actuations of the pull cord can achieve maximum charge.
|
