A secret that only old electricians know, what is the purpose of the two small holes in the plug?

If you look carefully in life, you will be surprised to find two small holes on some sockets. Many people don't know what this small hole is used for and what function it has. Careful friends will find this phenomenon, which is the two small holes on the two small iron pieces of some mobile phone chargers.

This kind of socket with holes is difficult to see in our country. This kind of plug was first used in the lives of Japanese people. That’s why generally imported electrical appliances have these two small holes.

The reason why the plug can carry electricity is that there are two very thin iron pieces inside the socket. If you insert the plug into the socket, the two small iron pieces on the plug will come into contact with the two small iron pieces in the socket, so that electricity can be supplied. But over time, the two metal pieces in the socket become loose easily. At this time, the plug with a small hole reflects its role. This can tightly buckle the contact and the metal piece together, so that there will be no signs of loosening easily. This brings great convenience to our lives.

Another function is that these two small holes have their own metal locks. Basically every family has children. If adults do not take care of it, children may easily get electric shock if they insert the plug into the socket. But if we lock these two pieces of iron with a lock, then they cannot be inserted into the socket, and the child will not get an electric shock. Such a function provides us with a great guarantee of life, and further ensures the safety of children.

Observe the little things around you in daily life, and you may find something different. It might also improve our quality of life.