Like most other basic mechanisms, metal springs exist for a long time in the Bronze Age. Even metal, wood is used as a structural member of a flexible bow and military catapult. In the Renaissance, the precise clock made the precision spring a necessity for the first time. 14th century saw the development of the precise clock of the revolutionary astronomical navigation. The world's exploration and conquest of European colonial Powers continues to provide impetus to the watchmakers "science and art." Another field of firearms, pushing the springs to develop. The advent of the Industrial revolution in the 18th century brought forth a large, accurate, inexpensive spring. Since watchmakers ' springs are often hand-made, spring-mass production of steel wire or similar materials. The advanced manufacturing method that makes the springs is ubiquitous. Computer control lines and sheet bending machines allow custom springs to be machined, which is clearly a dedicated machine. Spring is just an accumulator, it has the function of storing energy, but can not slowly release the energy, to achieve slowly release this function should rely on "spring + large transmission ratio mechanism" to achieve, common in mechanical watches. Spring is very early and very early application, the ancient bow and crossbow is two kinds of generalized spring. Spring inventors should be strictly British scientist Hooker (Roberthooke), although the spiral compression spring has appeared and widely used, but hooker proposed "Hooke's Law"-the spring elongation is proportional to the size of the force, according to this principle, in 1776, The use of helical compression springs spring balance. Soon, according to the principle of the production of watches for the use of the spring has been invented by hooker himself. And the spring that conforms to Hooke's law is the true spring. The Belleville Spring was invented by the French Belleville, which is a washer-shaped spring with tapered sections made of metal sheets or forged blanks. After the emergence of modern industry, in addition to the disc spring also appeared gas springs, Rubber springs, scroll springs, mold springs, stainless steel springs, air Springs, memory alloy springs and other new springs.