How do sunglasses prevent appearance infringement?

Within the scope of protection. The protection scope of design patent can be determined by ensuring that sunglasses prevent appearance infringement. The scope of protection of a design patent is the pictures submitted by the patentee to China National Intellectual Property Administration when applying for a design patent. Sunglasses are a kind of glasses, which can be used not only to show off coolness, but also to make you look straight at everything on the surface by taking advantage of its shading. At the same time, it is also a kind of glasses that can block the sun's rays.