Classification of clocks
One, in the clock industry, according to the different use of oscillators, can be divided into the following two watches:
1. A watch adjusted by mechanical oscillators;
Quartz watch: electronic oscillator - quartz oscillator for adjustment of the watch.
Two, in addition to rely on the dial form to calculate and display time, minutes, seconds. According to the display mode, the watch can be divided into:
Watch: A watch that displays hours, minutes and seconds only
Complex function watch: A watch that provides additional display functions in addition to hours, minutes, and seconds.
Types of mechanical watches:
Mechanical table can be divided into manual mechanical table and automatic mechanical table two:
Manual mechanical watch: hand chain movement, by turning the head of the watch, the watch movement in the mainspring full string, after the spring completely put to push the gear operation, drive the pointer.
Automatic mechanical watch: automatic chain movement is driven by the movement of the pendulum weight, when wearing a watch arm swing will drive pendulum rotation, while driving the mainspring watch on the chain, drive travel time.
Types of quartz watch:
Electronic watches can be divided into digital quartz electronic watch, pointer quartz electronic watch and automatic quartz watch and optical kinetic energy watch.
Digital quartz electronic watch: a watch that combines the piezoelectric effect of quartz crystals with a bipolar tube liquid crystal display. Its functions are completely performed by electronic components.
Pointer quartz watch: The quartz watch is powered by a silver oxide button battery that supplies a specific voltage to the integrated circuit.
The oscillating circuit and the quartz resonator are used to make the quartz oscillator vibrate and form the oscillating circuit source. From the output of the oscillation circuit of the frequency of 32768 Hz after the electrical signals into frequency division circuit after frequency division to produce 0.5 Hz level 16 pulse signal, and then through the narrow pulse circuit into the drive circuit to amplify the output pulse signal, and form variations of bidirectional pulse signal, and thus drive stepping motor for intermittent rotation, further drive the transmission gear train, Make the hands tell the time accurately.
Automatic quartz watch: combines the advantages of automatic mechanical watch and quartz watch. It does not require a battery, and wearers can choose to attach the chain manually or charge it automatically. Its electronic quartz device makes it more accurate, to an error of less than ten seconds a month. Its operating principle is to use the arm to drive the pendulum in the table to rotate and generate energy to drive the internal micro motor into energy, so as to provide sufficient power for the quartz device in the table, and the excess electricity will be stored by the micro capacitor for standby. When the watch is fully charged, it can operate continuously for more than 9 days without needing to wear the watch on the wrist. At present, Swiss tissot watch and Japanese seiko watch are more famous automatic quartz watch.
