The audio conversion head has a hole with a ground socket, and the plug part should have a grounding pin. The polarity between the socket and plug should be guaranteed. The protective components such as switches and fuses in the audio conversion head should be connected to the L pole. The rated current of the plug of the mobile audio converter shall not be less than the rated current of the audio conversion head. The operation of switches should be convenient, flexible, accurate and fast, and the operating parts should not stay in the middle position between the open and the broken. The current carrying parts in the switch shall use the metal containing more than 50% of the standard specified in the standard, and avoid using the way similar to copper and aluminum materials. The mechanical contacts of switches should have better breaking capacity, and no larger or continuous arcs can be generated when breaking. There are two kinds of common screw terminals and fast terminals. The latter simply inserts the wires into the terminal holes. The connection is completed, and it will never fall off. It is more convenient to use.
The audio conversion head of the big brand is basically using tin phosphorus bronze as a current carrier to ensure the normal service life of the audio conversion head for more than 12 years. A good audio conversion head is generally used as an integrated audio conversion head, and the continuous die process is used to use high quality tin, phosphorus and copper high precision belt to form and form one time to avoid too much. The riveting point reduces the resistance of the material itself, reduces the fracture of riveting part and the heat of rivet, and fundamentally eliminates the impact of the riveting points on the quality, and the safety performance of the audio conversion head is greatly improved. Fluorescent switches usually have two kinds of coating type and power source, the former is lower in price, but the energy is quickly exhausted after the phosphor is disappearing in the external light source, and it can not play the role of fluorescence. And the power luminescence technology can be used for a long time. The outer shell of the audio conversion head and all the insulating materials used must have good insulation. It ensures that there is enough insulation resistance and electrical strength between the charged parts and the parts that are easily touched and the charged parts of different polarity. The insulation material on the audio conversion head must have good heat resistance and fire resistance, which is a very important index.
In use, the audio conversion head may cause higher temperature and even make the charged metal produce red heat due to current action or abnormal work or failure. This requires that the insulation material of the audio conversion head should not be deformed and softened under certain temperature conditions, and do not expose the electrified parts to expose or meet the open fire. The flame spread. When consumers buy the plug audio conversion head, it is best to do a burning experiment on its core components, but if there is no condition, in appearance, the good material is generally hard, hard to scratch, the structure is tight, and the weight is heavy. The creepage distance refers to the shortest path between two conductive parts with different polarity or between the electrified parts and the surface of the easy touch surface along the surface of the insulating material; the electrical gap refers to the shortest distance between these components. The creepage distance and electrical gap between components of the audio conversion head must meet the standard requirements.