The watch calendar adjustment function is not complicated. Good adjustment is the basis to ensure the normal operation of the watch calendar function. The calendar function may be regarded as the simplest additional function of a fully automatic mechanical watch. The display types of the calendar are also diverse, and the more common one is the window calendar. In terms of changing the calendar digital form, there are three main types: instant jump, fast jump, and slow climb.
The common calendar window is mostly at the 3 o'clock position on the dial, and there are other positions. The strange one is the so-called "big eye" calendar. The ten and one digits of the calendar are made into two display discs so that the characters can be done Relatively large, no need to add a magnifying glass on the watch glass. The main parts constituting the calendar mechanism are: calendar dial, calendar dial wheel, calendar wheel, calendar positioning lever, calendar positioning lever spring, calendar quick dial, calendar cover and screws.
The working principle of the calendar disk : the power is transmitted from the hour wheel, and the calendar dial wheel rotates once every 24 hours through the speed change of the calendar wheel. There is a pin (or something like a spring) on ​​the calendar dial wheel. To dial the teeth of the calendar dial.
The calendar dial has 31 teeth and characters. The calendar positioning lever cuts into the teeth of the calendar dial and plays a positioning role under the pressure of the calendar positioning lever spring. If the calendar jumping mode is slow climbing or fast jumping, when changing calendars, the calendar dial and calendar dial will move a little bit slowly (from 8 pm to 12 pm); if the calendar jumping mode is instantaneous jumping Yes, then there should be a cam under the calendar dial, a large lever and a spring. When the cam is compressed by the large lever and suddenly released, the calendar dial is instantly hit by a tooth (word).
Most watches can also quickly dial the calendar, which is used to quickly adjust the calendar number. Generally, when the crown is pulled out by one gear, the calendar can be dialed quickly. The hands should be adjusted clockwise. Because for a movement with an additional structure, turning the pointer counterclockwise may damage the additional structure, because the additional structure is likely to be fragile (especially in the time zone where the additional structure works). Additional structures here include, but are not limited to, calendar, day of the week, moon phase, annual calendar, etc.
Also for some old movements or special movements, the design does not encourage counterclockwise movement of the hands. Forcibly turning the pointer counterclockwise will cause a significant increase in resistance. In severe cases, it may cause damage to the parts. Occasionally counterclockwise will not damage the watch.
At this time, the dial wheel engaged with the cross wheel will be disengaged and engaged with the calendar quick dial wheel. The calendar quick dial wheel is a swaying gear, that is to say, its shaft is a long hole, so only the crown rotates in a certain direction At this time, under the action of the tangential force of the gear meshing point, it will approach and engage the teeth of the calendar dial and rotate it. Calendar quick dials are often few, 3-5 teeth.
During the period from 8pm to 12pm, please do not adjust the calendar. This statement comes mainly from the movement of the slow jump calendar . Simply put, the slow crawl calendar has a so-called working time.
Depending on the design of the different watches, from a certain moment in the evening, the calendar enters the calendar change phase. The entire phase may last 2 to 4 hours and end in the early morning of the next day. Different watches start and end at different times, but basically all watches are covered from 9pm to 3am the next day. However, this problem does not exist for a movement with a date jump. So, if your watch is an instant jump calendar, you don't have to care.
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