引信最早起源于中国,早在12世纪我国就发明了一种引燃火药的信子,俗称“火药捻子”。它是一种原始的时间引信,也是引信的雏形。随着炸药的出现,它开始由“火药捻子”发展成管状的“信管”。随着对“信管”要求的不断提高,其结构越来越复杂,功能也越来越多,所以从1950年代起,我国将“信管”改称“引信”。由于弹药的种类很多,所以其配用的引信在外形、尺寸、结构和发火机理等方面也多种多样。本文在此仅展示我国早期的中小口径迫击炮弹引信。 Fuze first originated in China, as early as the 12th century, China invented a letter ignited gunpowder, commonly known as “gunpowder ”. It is an original time fuze, but also the prototype of fuze. With the advent of explosives, it began to develop from a “gunpowder” into a tubular “letter of trust.” With the continuous improvement of the requirements of “trust management”, its structure has become more and more complex and has more and more functions. Therefore, since the 1950s, China has renamed “trust management” and “fuze”. Due to the large variety of ammunition, the fuze equipped therewith is also varied in appearance, size, structure and ignition mechanism. This article shows only the early small and medium-sized mortar fuze in our country.