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用气泵给自行车打气时,为防漏气,常常需要用垫布堵住,很感麻烦。在这里介绍一种结构简单、密封可靠、不用垫布,使用和维修均较方便的打气活门(附图)。这种活门由阀芯、外套、弹簧和密封垫等零件组成。使用时,先将阀芯插入自行车气门嘴,再轻轻下压,阀芯即上移,于是气嘴与外套下部的密封垫压紧,阻止了气体由阀芯与外套间的间隙往外泄漏。此时,由于阀芯上移,阀芯上的横孔向上移过外套上部的密
Air pump to cheer the bike, to prevent leaks, often need to use a padded cloth, very troublesome. Here to introduce a simple structure, reliable seal, without padding, use and maintenance are more convenient cheer valve (with photos). This valve consists of a spool, jacket, spring and seal. Use, the first valve into the bicycle valve, and then gently pressure, the spool that is moved up, so the gas nozzle and the lower part of the gasket seal to prevent gas from the gap between the spool and the jacket to the outside leakage. At this point, due to the spool up, the horizontal hole on the valve core moves up the density of the top of the jacket