Patent ID: 7661612

Claim:
A shredder comprising: a shredding mechanism including an entrance, a shredding path, a first driving assembly, a second driving assembly, a sensing assembly and a shredding knife assembly, wherein said sensing assembly is electrically connected to said first and second driving assemblies, said entrance is disposed at a top side of said shredding mechanism for feeding an article to be shredded therethrough, and said shredding path is arranged between said entrance and said shredding knife assembly; a movable element disposed under said entrance and arranged at a lateral side of said shredding path, wherein said article is introduced into said shredding path through said entrance to be sustained against said movable element such that said movable element is shifted to result in a shift distance with respect to its original place; and a sustaining mechanism arranged at said lateral side of said shredding path to be sustained against said article passing through said shredding path, thereby reducing the trembling degree of said article when a shredding operation is implemented on said article and maintaining said shift distance less than a threshold value, wherein an enable signal is issued from said sensing assembly when said shift distance of said movable element is less than said threshold value, and in response to said enable signal, said first driving assembly is activated to have said shredding knife assembly perform said shredding operation and said second driving assembly is activated to have said sustaining mechanism move from an initial position to a sustaining position to be sustained against said article.