In the independent claim, when introducing the names of all parts, don't you need to introduce their basic functions and functions by the way?

There is no need to introduce functions and functions, and the claim itself is a technical solution. If it can be clearly described by technical features, there is no need to add functional descriptions, which will bring other problems. For example, if the function description is too detailed, it will limit the scope of protection of the claims and narrow the scope of protection. If the function description is too general, it is easy to make the scope of protection too broad, and it is easy to lose novelty and creativity, but it cannot be authorized.