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一次偶然的机会,我们一家去了古色古香的山村游览,见到了20世纪80年代曾风靡一时的拉线开关(图1)。很凑巧,那晚突然停了电,我反复拉了几下开关。这下惨了,灯到底是开着还是关着的,我都有点蒙了。结果,第二天起来,发现竟然点了大半夜的长明灯,浪费了不少电,罪过罪过。那么,如何改进这种开关,即使在停电时也能明断开关的开和关呢?为此,我陷入了深深的沉思之中。回家后,我把想改造这个开关的想法告诉了爸爸。爸爸随即在市场上购买了一只拉线开关和我一起研究,拉线开
By chance, our family traveled to the quaint mountain village and saw the all-time pull switch in the 1980s (Figure 1). Very coincidentally, that night suddenly stopped electricity, I repeatedly pull a few switches. This is miserable, the lights are on or off, I’m a little bit over. As a result, the next day, it turned out that the long lantern was spotted most of the night, wasted a lot of electricity and had sinned. So, how to improve this switch, even in the power outage can switch off and off it? For this reason, I fell into a deep meditation. After I got home, I told Dad about the idea of transforming this switch. Dad then bought a pull switch in the market to study with me, pull the line open