Safety device for staplers

Abstract

A safety link unit of a stapler is movably connected to a barrel of the stapler and a first section of the safety link unit is located beneath the nose portion and a second section of the safety link unit is located beneath the barrel. A trigger has a first end movably connected to the second section of the safety link unit so that the first end of the trigger is moved toward the activation rod of the valve in the handle of the stapler when the safety link unit is pushed against an object. The trigger is then pulled to push the activation rod to introduce pressurized air into the barrel to eject the staples.

1 . A stapler comprising: 
 a barrel having a nose portion connected to a front end thereof and a handle connected a rear end of the barrel, a valve received in the handle and an activation rod retractably extending from the valve;    a safety link unit movably connected to the barrel and a first section of the safety link unit located beneath the nose portion and movably protruding from a distal end of the nose portion, a second section of the safety link unit located beneath the barrel, and    a trigger having a first end movably engaged with a slot in the barrel, the second section of the safety link unit located adjacent to the first end of the trigger so that the first end of the trigger is linearly moved toward the activation rod within the slot when the safety link unit is adapted to push against an object.    
   
   
       2 . The stapler as claimed in  claim 1 , wherein a spring is mounted to the safety link unit and biased between a flange on the safety link unit and a stop on the barrel, the second section of the safety link unit movably extends through the stop.  
   
   
       3 . (canceled)  
   
   
       4 . A stapler comprising: 
 a barrel having a nose portion connected to a front end thereof and a handle connected a rear end of the barrel, a valve received in the handle and an activation rod retractably extending from the valve;    a safety link unit movably connected to the barrel and a first section of the safety link unit located beneath the nose portion and movably protruding from a distal end of the nose portion, a second section of the safety link unit located beneath the barrel, and    a trigger having a first end pivotably connected to the second section of the safety link unit, the first end of the trigger being moved toward the activation rod when the safety link unit is adapted to push against an object.    
   
   
       5 . The stapler as claimed in  claim 4 , wherein a spring is mounted to the safety link unit and biased between a flange on the safety Iink unit and a stop on the barrel, the second section of the safety link unit movably extends through the stop.