Whether a patent is novel or not is judged by comparing the contents of the claims of existing patents, while the patent law stipulates that the functions are not written in the claims, and generally only the contents of the structure and method are written.
Different principles, different structures and different methods of the same function can apply for different patents.
As long as the format of the application documents fully meets the requirements, the general application for utility model patent can basically be authorized smoothly, while the invention patent is difficult to be authorized.