Patent ID: 7032797

Claim:
A punching-depth adjusting device for use with a nailing gun, the nailing gun including a port having a socket assembly displaceable along an axis common with a piston shaft, the punching-depth adjusting device comprising: a scale sleeve ( 16 ) having an outer periphery and multiple cutouts ( 162 ) defined in the outer periphery at different axial positions; a sleeve ( 14 ) movably sleeving around the scale sleeve ( 16 ) and having an outer periphery, an annular groove ( 142 ) with a bottom defined around the outer periphery, and a through hole ( 144 ) defined in the bottom of the annular groove ( 142 ); and a resilient C-ring ( 12 ) clipping around the sleeve ( 14 ) and having an inward portion ( 122 ) penetrating the through hole ( 144 ) to selectively engage with one of the multiple cutouts ( 162 ).