Tie device with cam action lock pawl

A tie device having a tie strap and a buckle for engaging serrations on a free end of the tie strap for retaining the free end of the tie strap in the buckle, the buckle having a passage extending through the buckle from an insertion end for receiving the free end of the tie strap to an exit end for exiting the free end of the tie strap, and a cam action lock pawl located in the passage for engaging the serrations on the free end of the tie strap to hold the free end of the tie strap in the buckle characterized in that:

• the lock pawl has a first resilient leg that is attached to a first fulcrum portion of the buckle;
• that slants upward with respect to a base wall of the passage toward the exit end of the passage and that terminates in a free end,
• the lock pawl has a second resilient leg that is attached to a second fulcrum portion of the first resilient leg and that extends back toward the insertion end of the passage,
• the second resilient leg has a plurality of teeth that are mutually engageable with respective serrations of the tie strap to hold the free end of the tie strap in the buckle,
• the plurality of teeth of the second resilient leg includes a primary end tooth that has a lock face that is spaced from the first fulcrum portion away from the insertion end by a predetermined distance so that tension applied to the tie strap to pull the tie strap out of the insertion end of the buckle curls the first resilient leg away from the base wall of the passage, and
• the lock face is spaced from the second fulcrum portion by a predetermined distance so that the tension applied to the tie strap to pull the tie strap out of the insertion end of the buckle curls the second resilient leg toward the base wall of the passage.