Like most other basic mechanisms, metal springs have existed for a long time in the bronze age. Even metal, wood was used as a structural member for a flexible bow and arrow and military catapult. In the Renaissance, precise clocks and clocks made the precision spring d a necessity. The fourteenth century saw the development of a revolutionary astronomical navigation precision clock. The world's exploration and conquest of the European colonial powers continued to provide impetus to the clockmaker's "science and art. Another field of firearms is to promote the development of springs.
At the time of the industrial revolution in the 18th century, it was proposed to make large, accurate and cheap springs. In view of the fact that Clockmakers' springs are often made by hand, large-scale production of springs is made of Qin steel wire or similar materials. Advanced manufacturing methods make the spring ubiquitous. The computer control line and the sheet bending machine allow the processing of custom springs, which is obviously a special machine. The spring is only an energy accumulator. It has the function of storing energy, but it cannot release the energy slowly. To realize the function of slowly releasing, it should be realized by "Spring + large transmission ratio mechanism", which is common in mechanical watches. Springs have been used a long time ago. Ancient bows and crossbows are two kinds of springs in a broad sense. In a strict sense, the inventor of the spring should be the British scientist Robert Hooke. Although the helical compression spring had appeared and been widely used at that time, Hooke put forward the "Hooke's law" -- the elongation of the spring is proportional to the magnitude of the force received. It is precisely according to this principle that the spring scale using the helical compression spring came out in 1776. Soon, the spring made according to this principle for clocks and watches was also invented by Hooke himself. The spring that conforms to Hooke's law is the real spring. Disc spring was invented by Belleville, a Frenchman. It is a washer type spring with truncated cone-shaped section made of metal sheet or forged blank. After the emergence of modern industry, in addition to disc springs, new springs such as gas springs, rubber springs, scroll springs, mold springs, stainless steel springs, air springs, and memory alloy springs also appeared.
