Patent ID: 7556212

Claim:
An auto electricity breaker for a shredder, comprising: a base; a breaker switch for controlling the electrical power to the shredder; an energy storage device driven by a cutting blade ensemble of the shredder to store energy; a variable gear set driven by the energy released from the energy storage device; a trigger driven by the variable gear set to trigger the breaker switch; and a starting switch for restoring the trigger; wherein the energy storage device releases its stored energy when the cutting blade ensemble stops its operation and drives the variable gear set into operation; the variable gear set drives the trigger when it rotates to a certain extent; the trigger releases the breaker switch to break the electrical power to the shredder; and when the electrical power of the shredder is turned on again, the starting switch restores the trigger to its original position so that the shredder starts its normal operation and the electricity breaker resumes its auto electricity breaking function.