Patent ID: 7644849

Claim:
An effort-saving stapler comprising: a shell; a magazine disposed in the shell for supporting and feeding nails or staples; a hammer disposed in the shell for hammering the nails or staples, one at a time; an elastic element disposed in the shell for biasing the hammer; a block disposed in the shell, wherein the block comprises teeth formed thereon; a trigger engaged with the block at an engagement point, wherein the trigger comprises teeth of which a selective one is engaged with a selective one of the teeth of the block, with the trigger pivotally connected to the shell by a pivot pin inserted through the trigger and the shell, with the pivot pin movably disposed in the shell for movement perpendicular to the pivot pin, with the trigger moveable between a normal position and a fully pivoted position, with the pivot pin in the normal position being spaced and parallel to the pivot pin in the fully pivoted position; and an extensive element comprising a first end connected to the hammer and a second end telescopically connected to the trigger so that when the trigger is operated, the hammer is lifted by the extensive element and the engagement point is moved towards the hammer.