A self-winding watch movement has a mechanism which winds the mainspring using the natural motions of the wearer’s body. The watch contains an eccentric weight that turns on a pivot. The normal movements of the watch in the user’s pocket or on the user’s arm cause the rotor to pivot on its staff, which is attached to a ratcheted winding mechanism. The motion of the watch is thereby translated into circular motion of the weight which, through a series of reverser and reducing gears, eventually winds the mainspring. There are many different designs for modern self-winding mechanisms. Some designs allow winding of the watch to take place while the weight swings in only one direction while other, more advanced, mechanisms have two ratchets and wind the mainspring during both clockwise and anti-clockwise weight motions.
The fully wound mainspring in a typical watch can store enough energy reserve for roughly two days, allowing the watch to keep running through the night while stationary. In many cases automatic wristwatches can also be wound manually by turning the crown, so the watch can be kept running when not worn, and in case the wearer’s wrist motions are not sufficient to keep it wound automatically.
Lancardo Automatic Mechanical Watches Men Brand Luxury Gold Stainless Steel Simple Business Transparent Watch Relogios Masculino
- 1pcs Box
- 1pcs Watch
- And normal package
Watches are 30M waterproof ( life waterproof ),.