Patent ID: 7128641

Claim:
A grinder comprising: a housing; a rotary shaft rotatably disposed in the housing; and a press button unit including: a button seat; a press button member fitted in the button seat, two ends of the press button member respectively protruding from two ends of the button seat, the press button member being axially movable along an axis of the button seat, whereby the press button member is selectively moved toward an inner end of the button seat into an engaging position engaging the rotary shaft to stop rotation thereof, and moved toward an outer end of the button seat and located in a releasing position separated from the rotary shaft; and a resilient mechanism disposed between the button seat and the press button member, the resilient mechanism serving to resiliently keep the press button member in the releasing position; the press button unit being mounted on the housing, whereby by means of pressing the outer end of the press button member, when the press button member moves axially from the releasing position to the engaging position, the press button member rotates within the button seat allowing the press button member to move from the releasing position to the engaging position, when the press button member does not rotate, the press button member remains in the releasing position.