| 摘要 |
A piston assembly for a staple gun has a piston head, a driving rod and a fastener. The piston head has a connecting post formed on and protruded axially from a top of the piston head and having two mounting blocks and an inserting recess. Each mounting block has two indents and two holding tabs. The inserting recess is defined between the inner sides of the mounting blocks, and the holding tabs extend into the inserting recess. The driving rod is connected securely with the piston head and has a body, a connecting segment and a driving segment. The connecting segment is mounted and held in the inserting recess and is engaged firmly with the holding tabs. The driving segment is formed on the upper end of the body to press staples out of the staple gun. The fastener is connected with the driving rod and the piston head.
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