① System. The original movement is based on the storage energy components, and the energy stored is generally two days and 8 days. The alarm clock that can be stored for one day often uses a structure without a bar box; the gears in the transmission system often use the sales of the correction line, and its small gears (pyramid wheels) use cylindrical steel wires as wheel teeth; the escapement mechanism is more. It uses a nail type (commonly known as a rough horse). It uses cylindrical steel wire for fork, which is low in cost, but the accuracy of the time is also low. Due to the high speed of the swing wheels, the vibration cycle is 0.6 seconds of swing wheels, and the rotating rotation of the wheel shaft and the bearing of the swing to 288,000 times in 24 hours, the choice of the structure and material of the supporting support directly affects the life of the bell. Essence In order to improve the life, the axis shaft and the bearing of the alarm clock produced in China adopt a cylindrical structure. The top of the wheel shaft is a spherical surface with a large curvature radius. The maintenance cycle and life of the bell. Travels are often made of phosphorus copper or nickel -based alloy.

② Time System: Generally, there are 4 parts: original mechanism, transmission mechanism, escapement agency and pairing mechanism. At the time of trouble, the original mechanism can also share a clockwork with the original mechanism when leaving, but add a limited -bit mechanism to the strip shaft to control the length of the clockwork when the trouble is controlled; The requirements are not high, so the escapement regulator that is not inherently vibrated cycle is often used without a swing wheel and scarf, and the hammer is installed on the fork shaft. The mechanical music alarm clock also has a rolling wheel with a needle -driven needle. The needle is arranged according to the score, the sound spring is dumped, and the music is played.