Importance

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Abstract

An intelligent shift paper shredding mechanism and a method of automatic shift of the same in accordance with the present invention includes a control circuit including a control chip electrically connecting with a shift circuit and a locked-stator detect circuit. The shift circuit electrically connects with a motor. The method of adjusting power of the motor includes steps of: a) turning on the highest tap position switch circuit to initiate the motor; b) automatically switching to the lowest tap position switch circuit after a predetermined time delay; c) when the locked-rotor detect circuit detecting the current tap position cannot shred papers, automatically switching to higher tap position switch circuit, repeating this step until to the highest tap position switch circuit, otherwise keeping on the electrical connection to the current tap position switch circuit; d) when the locked-rotor detect circuit detecting a paper jam, automatically turning on a normal-reverse switch circuit and corresponding tap position switch circuit at the same time to exit the jammed papers. The cooperation between the shift circuit and the locked-rotor detect circuit realizes the goal of adjusting power of the motor intelligently according to different quantities of the papers, and thus, makes the paper shredder in which the paper shredding mechanism is used more economic in energy.

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First Claim