| In the current information technology highly developed today. Information is very important for the government, enterprises and individuals, especially for some large enterprises and government departments, confidential data and information is very important, for large enterprise the loss of information about the survival of the enterprise, and the loss of important information for some important government departments will reduce the government’s credibility. Paper shredder as a office security equipment also along with the development of the era, more and more be taken seriously. This article through to the current shredder development status and trend at home and abroad, this paper expounds the general design method of shredder and basic principles, using the methods and principles for century case studied, designed a new, fashion, environmental protection, interesting manually type the shredder. |