Patent ID: 7604190

Claim:
A discharge opening and power control structure used in a grinder, comprising: a grinder body, said grinder body comprising a discharge opening for discharge of the ground powder, and a battery chamber, said battery chamber having a positive pole contact and a negative pole contact extended out of said grinder body; a shut device coupled to said grinder body and rotatable relative to said grinder body between a close position to close said discharge opening and to turn off power supply of said grinder body, and an open position to open said discharge opening and to turn on power supply of said grinder body, said shut device having a slot, which is in alignment with said discharge opening when said shut device is rotated relative to said grinder body to said open position, and a metal contact plate, which contacts said positive pole contact and said negative pole contact to turn on power supply of said battery chamber when said shut device is rotated relative to said grinder body to said open position.