Mechanical watch movement mainly is by the energy storage system, transmission system, control system and the benchmark system, etc.All each have each function module system, through the combination of complementary to each other to make the watch run smoothly and energy system is composed of articles on institutions and box, like a watch the power switch control system, and the benchmark system, as the name implies watches as precise circle is in the charge of it.Balance wheel and hair spring is made up of a mechanical watch benchmark system.Balance spring is a spiral of Archimedes form (table friends: "say people", "mosquito-repellent incense shape" -- grievance expression) of the metal filaments, through the energy release, balance spring will drive the balance wheel movement, back and forth through this regular oscillation frequency, the second hand "tick tick" operation.