So that consumers will not be confused, mistaken or purchased by mistake. Taking the vision and level of ordinary consumers as the scale is the standard to judge whether the product design is the same or similar. And unauthorized use without the consent of the patentee constitutes infringement.
Legal objectivity:
Article 59 of the Patent Law The scope of protection of the patent right for invention or utility model shall be subject to the contents of the claims, and the description and drawings may be used to explain the contents of the claims. The protection scope of the patent right of design shall be subject to the design of the product shown in the picture or photograph, and the brief description can be used to explain the design of the product shown in the picture or photograph.