Driving device

A driving unit comprising:.

• a pneumatic head for being combined to a pneumatic tool;
• a front end of the pneumatic head being installed with a push rod;
• a driving unit having a slender driving rod at a front end thereof;
• the push rod serving to push the driving unit;
• an elastomer;
• a casing having a receiving space;
• the elastomer being received in an upper end of the receiving space;
• and the driving unit being received in an upper end of the receiving space and resisting against the elastomer;
• a rotating unit having an engaging portion at a lower end thereof;
• the rotating unit being received in a lower end of the receiving space;
• an upper side of the rotating unit having a contact portion;
• the configuration of the contact portion being corresponding to one end portion of the driving unit;
• wherein when the teeth portion of the rotating unit resists against the oblique end surface of the driving rod, the rotating unit gets a rotating force for driving the engaging portion;
• wherein when the driving unit is impacted by the pneumatic head, the driving unit will move downwards;
• and the driving rod will drive the rotating unit;
• and when no force is applied to the driving unit, the driving unit will restore to an original place by the elastomer.