Adjust the speed of the watch by changing the working length of the hairspring. When the length of the hairspring decreases, the unit time of contraction of the hairspring becomes smaller, the frequency becomes faster, and the watch moves faster, and vice versa. When the fast and slow hands move to the outer pile, the working length of the hairspring increases and the watch moves slowly; When moving in the opposite direction, the working length of the hairspring is reduced and the watch moves fast.
The change of the working length of the hairspring determines the vibration period of the hairspring. If the working length of the hairspring is shortened by rotating the fast and slow hands, the cycle will be shortened and the watch will go faster; If the fast and slow hands rotate in the opposite direction, the working length of the hairspring will increase, the cycle will increase and the watch will slow down.
Extended data:
Precautions for using mechanical watches:
Avoid violent impact when wearing a watch. Although many watches are designed with anti-collision function, excessive impact will still cause damage to the surface and movement of the watch. Seriously, it will even lead to the scrapping of watches.
Many mechanical watches are waterproof, but it doesn't mean that we should always wear them in an environment with water. In particular, the watch has a long life and poor waterproof performance, and water may damage the watch. Take it off when taking a shower at ordinary times to avoid damaging the waterproof membrane.
Antimagnetic. Try to avoid placing the watch next to the magnetic field, because this may lead to the phenomenon that the watch is not allowed to go or not to go.
Baidu encyclopedia-mechanical watch