Patent ID: 7179156

Claim:
A grinder with easily installable/detachable grinding disc and a linkage effect, comprising: a main body in which a rotary shaft is disposed for a grinding disc being mounted under a bottom end of the rotary shaft and drivable by the rotary shaft; a controlling button mounted on the main body and switchable between an activation position and a shutoff position for powering on or off the grinder; a linking member connected with the rotary shaft and synchronously rotatable therewith; and a chucking mechanism mounted in the main body and movable between an engaging position and a releasing position, whereby when the chucking mechanism is moved to the engaging position, the chucking mechanism chucks the linking member, while when the chucking mechanism is moved to the releasing position, the chucking mechanism releases the linking member from the chucked state; the controlling button having a linkage function with the chucking mechanism, whereby when the controlling button is positioned in the activation position, the chucking mechanism is positioned in the releasing position and cannot be moved to the engaging position, while when the controlling button is positioned in the shutoff position, the chucking mechanism can be moved from the releasing position to the engaging position where the controlling button cannot be switched to the activation position.