Mechanical timer is different from electric timer, and its internal structure is similar to clocks and watches, and one or more electrical switch contacts are controlled by machinery.
Commonly used in ovens, ovens. Its function is to time, turn the handle and turn on the power supply (the oven and other electrical appliances start to work), and the dial is marked with the time scale. When you dial a certain scale (for example, 10 minute), the countdown begins, accompanied by the sound of "da, da ……". 10 minutes later, the zero timer ends, at the same time, the power supply is cut off, and the oven and other electrical appliances stop working.