Patent ID: 7506787

Claim:
A nail-driving device comprising: a housing; a trigger unit; a safety unit including first and second safety members that are disposed movably in said housing; a connecting unit in said housing, and connected pivotally to said second safety member, and including a retaining portion disposed movably between said first and second safety members and when said retaining portion being in a retaining position whereat synchronous movement of said first and second safety members is allowed and whereat a force is applicable to said first safety member to move said second safety member so as to allow for a nail-driving operation when said trigger unit is actuated; and a magazine connected to said housing and including a pusher adapted to push and move nails in said magazine, wherein when said nails of said magazine are exhausted, said pusher moves to a retention releasing position whereat said connecting unit is pivoted to remove said retaining portion of said connecting unit from said retaining position to thereby allow for relative movement of said first and second safety members so that the nail-driving operation is prevented.