Do you know the knowledge of these screwdrivers?

A screwdriver is something we use from time to time. The seemingly simple screwdriver actually contains a lot of knowledge. Have you heard the following screwdriver tips?
1. Who invented the screwdriver?
The Greek mathematician Archimedes invented the thread in the 3rd century AD, but the first screw did not appear until the 15th century, the wood screw in 1550, and the screwdriver in 1774. As for the inventor, it should be a carpenter in the society at that time.
Phillips screws and Phillips screwdrivers were invented by Henry Phillips in the 1930s and were first used on automobile assembly lines.
2. Different names of screwdrivers
In China, different regions have different names for screwdrivers. Beijing-Tianjin-Hebei-Lu-Jin-Yu and Shaanxi Shaanbei dialects are called "drivers"; Jiangxi, Anhui, Hubei and Shaanxi are called "drivers"; The region is called "Kai Dao", and the Yangtze River Delta region is called "Rotary Chisel".
3. The principle of screwdriver
The screwdriver takes advantage of how levers work when used to pry paint caps. The greater the distance from the power point to the fulcrum, the more labor-saving, so a long screwdriver is more labor-saving than a short screwdriver.
A screwdriver takes advantage of the working principle of an axle when it is used to turn a screw. The larger the wheel, the less effort, so it takes less effort to use a thick-handled screwdriver than a thin-handled screwdriver.
4. Types of screwdrivers
Ordinary screwdrivers are screwdrivers with the head and handle together, and they can be used as long as they are taken out. However, since there are many different lengths and thicknesses of screws, sometimes many different screwdrivers need to be prepared.
A combination screwdriver is a screwdriver with a separate head and handle. When installing different types of screws, you only need to replace the screwdriver head without preparing a lot of screwdrivers. The advantage of such a screwdriver is that it saves space, but it is easy to lose the screwdriver head.
An electric screwdriver is a screwdriver that uses an electric motor instead of human hands to install and remove screws, usually a combination screwdriver.
5. The material of the screwdriver
The head of a high-quality screwdriver is made of spring steel with relatively high hardness. A good screwdriver should be hard but not brittle, and tough and tough. When the opening of the screw head becomes bald and slippery, you can hit the screwdriver with a hammer to make the groove of the screw deeper, so that the screw can be unscrewed easily, but the screwdriver should be unscathed; the screwdriver is often used to pry things, and it is required to have a certain toughness Do not bend or bend.