| 摘要 |
A driving unit comprises 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; and 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;
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