Stapler

A stapler comprising:

• a base portion having a rotatable clinching portion;
• a magazine portion which is rotatably attached to a portion of the base portion which lies in the vicinity of a rear end thereof by means of a spindle;
• a push-down member which is rotatably attached to a portion of the base portion which lies in the vicinity of the rear end thereof in such a manner as to be disposed above the magazine portion and which has a driving blade in the vicinity of a front end thereof;
• handle supporting members which are fixed to the base portion and which have guide rails in which a handle shaft slides in the vicinity of front ends of upper portions thereof;
• and
• a handle portion which is rotatably attached to the push-down portion by means of a connecting shaft and which is rotatably attached by means of a handle shaft which can slide in the guide rails of the handle supporting members above the position where the driving blade is disposed;
• wherein
• the handle portion causes the push-down portion to descend by virtue of the principle of the lever with the handle shaft made to act as a movable fulcrum, a portion of the handle portion which lies in the vicinity of a rear end thereof as a point of application of force, and the connecting shaft as a point of action.