Safety control pin for controlling a push plate to activate pneumatic switch of pneumatic staplers

Abstract

A safety device for pneumatic staplers includes a control pin movably connected to the barrel of the stapler and the control pin has a first groove and a second groove, wherein the first groove has a depth deeper than that of the second groove. A trigger pivotably connected to the barrel has two sidewalls and each side wall has a protrusion which is engaged with one of the first and second grooves. A push plate has a first end pivotably connected between the two sidewalls of the trigger and a second end of the push plate has a tongue extending axially therefrom. The push plate is located beside a pneumatic switch of the stapler. A safety link is movably connected to the barrel and an end of the safety link is located corresponding to the tongue of the push plate. If the trigger is pulled before the safety link is pushed against an object, the tongue is not pushed and co-moved with the safety link so that the pneumatic switch will not be activated.

Dependencies are inferred from the claim text.