Switch as a category (family), can be divided into sub-category (Sub-family), type (type), variety (Variety) and ge (Variant). The currently widely used switch types are:

　　 Rotary switch category

　　 Rotary switch, cam switch, brush switch, indicating wheel coding switch, combination switch.

　　 Button switch category buttons (momentary button switch), single button switch.

　　Combination button switch category

　　Multi-unit button switch (also known as direct key switch), combined multi-unit button switch.

　　 Micro switch category

　　Basic type micro switch, additional drive micro switch.

　　 Button switch category

　　 button handle switch, wave switch (also known as wave switch).

　　Dual in-line switch category

　　 Wave type double in-line switch, sliding type double in-line switch, button handle type double in-line switch.

　　Slide switch category

　　 Toggle slide switch, push-pull slide switch, lever slide switch, rotary slide switch.

　　Keyboard switch category

　　Keyboard switch, touch mode keyboard switch, membrane keyboard switch.

　　 Membrane switch category

　　Pressure switch category Standard pressure switch, absolute pressure switch, differential pressure switch

　　Temperature switch category

　　 Thermostat switch, adjustable thermostat switch, ambient temperature thermostat switch, non-adjustable thermostat switch.

　　Time switch category

　　 Thermal time delay switch, temperature compensated thermal time delay switch. Variable thermal time delay switch.

　　Proximity switch category

　　 Ultrasonic switch category

　　Photoelectric switch category

　　(2) Classified by purpose

In actual use, 　　 switches are classified as follows according to their different uses:

　　①It is called a power switch for power on and off;

　　②For power conversion, it is called a transfer switch;

　　③For system control, it is called control switch;

　　④For circuit selection, it is called circuit selection switch;

　　⑤For power selection, it is called power selection switch;

　　⑥For maintenance, it is called maintenance switch;

　　⑦for channel pre-selection is called channel pre-selection switch;

　　⑧ is called temperature switch for temperature control;

　　⑨ for controlling time is called time switch;

　　⑩ is called a pressure switch for pressure control.

　　Of course, there are other switches, and the name of the switch can be determined according to its purpose.

　　(3) Classified according to the structure of the driver

　　The structure of the switch driver includes button type, button handle type, lever type, sensitive type, tension spring type, rotary type, axial type, indicating wheel type, sliding type, and thin mirror type.

　　 (4) Switch drive form

The basic working mechanism of 　　 switch includes a drive mechanism and a switching mechanism of contacts. The closing and opening of the contacts are converted by the movement of the drive mechanism to realize the on and off of the circuit. The driving forms to make the driving mechanism move are: manual driving: mechanical driving, temperature change driving (temperature control switch), pressure change driving (pressure sensitive switch): photoelectric conversion driving (photosensitive switch), ultrasonic change driving (voice control switch), Other drivers.

　　 (5) Switch contact conversion form

　　 The contact conversion forms of the switch are: first make and then break, first break and then make, instantaneous break, reliable break: instantaneous make, normally break.

　　(6) Load type of switch

　　The load types of switches are: resistive: inductive, bulb, motor, low level (dry circuit).

　　(7) Switch terminal type

　　The terminal types of the switch are: welding type, screw type, lead type, plug-in type, integral wiring type and printed board type.