The principle of automatic mechanical watch

Automatic mechanical watch  is based on the structure of ordinary mechanical watch, adding a part of automatic mechanism device, through the action of the watch wearer’s arm movement in daily life automatically winds. The words “Automatic” printed on the dial indicate that it is an automatic mechanical watch, among which there are also automatic mechanical watches and semi-automatic mechanical watches.
To understand the principle of an automatic mechanical watch, you need to understand its automatic mechanism. The automatic mechanism is oscillated by a weight (automatic oscillating weight), and the special function of automatic winding is realized by the automatic winding wheel system connected to the original dynamic system.

automatic watch
In 1920, in the UK, watchmaker John Howard invented the prototype of a modern automatic mechanical watch. The principle of the automatic mechanical watch laid the foundation for the development of the automatic mechanical watch industry. But he is not the first person to make an automatic mechanical watch. As early as 1770, when there were Swiss people, Louis Burret made the earliest automatic pocket watch. Due to the hand-made, the quantity is very small, it is difficult to see in the flea market. Because it is the predecessor and birthplace of modern automatic mechanical watches. As a result, the Swiss watchmaking industry has become famous.

lady mechanical watch
The principle of automatic mechanical watch The difference between semi-automatic and fully automatic: the self-weight hammer (ie, automatic oscillating weight) of the driving part of the automatic mechanical watch is an automatic winding drive system through a set of automatic wheel systems, and the winding is automatically wound by the arm. Due to the different working states of the weight and automatic winding system used in automatic watches, the structure of automatic mechanical watch can be divided into the following four types:
1. Swing one-way bar;
2. Swing type bidirectional winding;
3. Rotating unidirectional bar,
4. Rotating two-way winding;
Swing type automatic weight can only swing about 120 ° in the watch machine, which is semi-automatic. The rotary automatic weight can be rotated 360 ° in the watch machine, which is called fully automatic. This is the principle of semi-automatic and fully automatic mechanical watches.
In the early automatic mechanical watches, automatic weights were used to make linear reciprocating movements in the two grooves on the core of the watch. This automatic mechanism is called bucket automatic; because of its poor winding effect, it was eliminated early. But because of its limited output, it is very collectible.
Some automatic mechanical watches have a pointer on the dial, which shows the amount of automatic winding, and the reliability of automatic winding can be judged. Due to the complexity of the mechanism, it needs to be composed of 14 parts, so there are not many automatic watches using this type of mechanism.


Post time: May-28-2020
  • facebook
  • linkedin
  • twitter
  • youtube
WhatsApp Online Chat !