Why does the utility model patent not need to pass the substantive examination?

The invention mentioned in Item 3, Paragraph 2, Article 2 of the Patent Law refers to a new technical proposal for a product, method or its improvement. Utility model refers to a new practical technical scheme for the shape, structure or combination of products. It can be seen that invention patents cover product and technical ideas (methods and technical solutions), so inventions are generally divided into product inventions and method inventions. Compared with the invention, the scope of utility model is very small, mainly aiming at the technical scheme (it must have a shape), and the level of creation is low and the technical requirements are not very high, so it is called "small invention", and it is also called "small patent" after authorization. In order to reduce the examination and approval procedures and shorten the authorization time, the utility model patent is not subject to substantive examination.