| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a penlight possible to be always and easily lighted. <P>SOLUTION: A freely movable permanent magnet (2) is inserted in a plastic cylinder 1, and a coil (3) is provided in the cylinder (1). A rectifier 4 and a capacitor (5) for accumulation of electricity are connected to the output line of the coil 3, and a constant current diode (6) and a light emitting diode (7) are connected in series from the capacitor (5). <P>COPYRIGHT: (C)2004,JPO&NCIPI |
