Research On Creative Design Of Inverse Folding And Water Collecting Umbrella Based On Patent Circumvention

With the development of China's economy,more and more kinds of products can be produced by domestic enterprises,and many products are exported to foreign countries.Chinese enterprises often encounter patent barriers when conducting foreign trade.The existence of patent barriers will make the products of enterprises unable to be sold or the enterprise to pay a high fee for patent use before they can be sold,which will affect the profits of enterprises and restrict the further development of China's economy.Although the patent barrier has many restrictions on enterprises,but it is reasonable and legal,so enterprises must form their own patent system as soon as possible to take the lead in the market competition.In order to break through the existing patent barriers,it is particularly important for enterprises to accelerate product development and technological innovation.Patent circumvention design refers to the modification of existing design and the formation of new design within the scope of patent circumvention protection.The use of patent circumvention design can greatly accelerate the innovation process.This paper describes the patent circumvention method based on TRIZ theory in detail,and summarizes the detailed process.Taking the relevant patents of umbrellas as an example,combined with the practical problem of random drops of rain in daily life after rain,the patent circumvention process summarized above was verified.Finally,ANSA and LS-DYNA are used to verify the wind resistance of the inverse folding and water collecting umbrella based on finite element simulation.The results of finite element simulation show that the maximum stress is less than the allowable stress,which verifies the rationality of the design.The main research contents of this paper are as follows:(1)Summary of patent circumvention process.This paper introduces the research status of TRIZ theory at home and abroad,applies TRIZ tools to patent circumvention design,and summarizes the patent circumvention process based on TRIZ theory.(2)Mining,searching and analyzing patents of umbrella.By digging the hot spots of umbrella patents through Baiteng NET,it is determined that the new product takes "special folding" and "water collection" as the innovation points.Using SooPAT tool,relevant patents of innovation points were searched.After screening,five patents of each innovation point were selected as candidate target patents.Based on the analysis of the above ten patents,CN201520629003 and CN201720884070 were finally determined as the target patents.Then,the functional structure diagrams of the target patents were drawn.(3)Patent circumvention patent circumvention design of the inverse folding and water collecting umbrella.According to the design objective of the umbrella,physical contradiction analysis,technical contradiction analysis and object-field model analysis are respectively carried out on the existing problems of the target patent,which provide a scheme for the design of the umbrella's rod form,folding mode and water-collecting assembly.(4)Modeling and wind resistance finite element simulation of the inverse folding and water collecting umbrella.According to the scheme above,the umbrella is designed in detail,and the 3d model of the new umbrella is established through NX.According to GB/T 31895-2015 "wind strength test method for umbrella products",the 3D model was simulated by finite element method.First,the 3D model was imported into ANSA for pre-processing,and then LS-DYNA was used for calculation.The simulation results show that the designed new umbrella meets the requirements of national standard.