Article 17 of the Detailed Rules for the Implementation of the Patent Law stipulates that the specification of an application for a patent for utility model shall have drawings showing the shape, structure or combination of the product to be protected.
Utility model refers to a new technical scheme suitable for practical use for the shape, structure or combination of products. The attached drawings are an integral part of the specification. The function of the appended drawings is to supplement the description of the text part of the manual with graphics, so that people can intuitively and vividly understand the technical features and overall technical scheme of the utility model.