Internal parts structure of alarm clock? 1? three

The basic structure of the alarm system is that a timing wheel is controlled by the timing shaft of the alarm clock, and the timing wheel is connected with a timing pointer to indicate the corresponding predetermined time. There are three inclined holes located on concentric circles with different radii on the timing wheel, and the positions of the three holes are determined after the timing shaft is adjusted for a predetermined time.

The upper part of the timing gear is an hour wheel with three holes. There is a follower on the hour wheel, and the follower has three inclined protrusions, which pass through the three holes and grooves of the hour wheel and correspond to the three small holes of the time wheel.

Extended data

Alarm clock movement includes two systems: walking time and alarm clock time.

① Travel time system: The travel time system of pointer-type electronic alarm clock includes quartz resonator, CMOS integrated circuit (frequency division and driving), stepping motor (converting electric energy into mechanical energy), counting and transmission mechanism, pointer mechanism and other components.

The digital electronic alarm clock travel time system includes quartz resonator, CMOS integrated circuit (frequency division, calculation and driving), LCD screen or LED, conductive rubber and other components. In addition, both analog and digital devices include batteries, trimming capacitors, clamping plates and circuit boards.

(2) Alarm system: integrated circuit or transistor switch circuit (isolation element) outputs signals to drive speakers or other audio devices; The other is to directly use the electromagnetic principle to attract a hammer to hit the alarm or attract other sound generating devices through the on-off current of the coil.