Patent ID: 6116488
Filing Date: 2000-09-12
Classification: B25C

Abstract:
A trigger switching structure of a contact/full sequential actuation fastening tool, being used in a trigger in the shape of ""U"" and pivotally mounted between a safety yoke and a trigger valve both of said fastening tool, said switching structure is comprised of a receiving seat, a stop piece and a spring, and is characterized by that:said stop piece has a pivot end and a beveled stop end, said pivot end is inserted therethrough with a positioning rod for pivotally mounting said stop piece on said receiving seat;said receiving seat is in the shape of ""U"" and is provided on one end thereof with a tenon, said positioning rod is fixedly provided on said receiving seat and has its both ends extended out of said receiving seat;a supporting rod is fixed on said trigger and is inserted in said receiving seat, said spring is mounted straddling said trigger and said receiving seat to allow said receiving seat to slide and move elastically in said trigger;said trigger is provided on one side thereof with a tenon hole, a tenon groove and two positioning holes, said tenon hole and tenon groove both are adapted to receiving therein said tenon of said receiving seat; said trigger is provided on the other side thereof with an arciform slide hole aligned with both said positioning holes;by combination of the above members, and by assembling said stop piece between said safety yoke and said axle of said trigger valve, the two ends of said positioning rod is adapted to switching in said arciform slide hole and between said two positioning holes, a user can thus conveniently adjust said receiving seat to allow said tenon to switch elastically to change the engaging position of said tenon hole and tenon groove, thereby, said stop piece is moved and its position relative to said safety yoke and said axle of said trigger valve is changed over between a contact and a full sequential actuation position for fastening.