Abstract: Foldable ladder includes main ladder and auxiliary ladder, and top end of ladder frame of auxiliary ladder being connected to ladder frame of main ladder through hinge mechanism, wherein hinge mechanism includes main ladder hinge plate, auxiliary ladder hinge plate, and shaft pin lock assembly connecting main ladder hinge plate and auxiliary ladder hinge plate, wherein main ladder hinge plate includes first hinge plate, second hinge plate, and third hinge plate connected in “Z” shape sequentially, and in extending direction of pedal of main ladder: first hinge plate is fixed to outer side surface of ladder frame of main ladder, and located on outer side of third hinge plate; auxiliary ladder hinge plate is fixed to top end of ladder frame of auxiliary ladder, and shaft pin lock assembly passes through third hinge plate and auxiliary ladder hinge plate and connects auxiliary ladder hinge plate to third hinge plate.

Abstract: A caulking gun handle and a caulking gun are provided. A caulking amount adjusting assembly is mounted on a movable handle of the caulking gun; the caulking amount adjusting assembly comprises a driving shaft and a driving shaft positioning member; portions at two sides of a mounting groove are each formed as a handle mounting portion; a driving protrusion and first and second positioning recesses are provided on a peripheral surface of the driving shaft, the driving shaft can slide left and right with respect to the two handle mounting portions, so that in a first workstation, an end portion of the driving shaft positioning member located in the driving shaft mounting hole is engaged in the first positioning recess, and in a second workstation, the end portion of the driving shaft positioning member located in the driving shaft mounting hole is engaged in the second positioning recess.

Abstract: A ground fault circuit interrupter comprises a reset key, a reset locking mechanism, a reset mechanism, a reset bracket, a bracket reset mechanism, a bracket homing mechanism, a reset linkage mechanism, and a reset linkage clutching mechanism. A conductive assembly is configured to selectively connect or disconnect electrical continuity between the power input side and the load side. The conductive assembly comprises pairs of short-circuit conductive strips with conductive movable contacts, power input connection assemblies with input conductive stationary contacts, wiring output assemblies, receptacle output assemblies with output stationary contacts, and a first short-circuit conductor and a second short-circuit conductor.

Abstract: A ground fault circuit interrupter comprises a reset key, a reset locking mechanism, a reset mechanism, a reset bracket, a bracket reset mechanism, a bracket homing mechanism, a reset linkage mechanism, and a reset linkage clutching mechanism. A conductive assembly is configured to selectively connect or disconnect electrical continuity between the power input side and the load side. The conductive assembly comprises pairs of short-circuit conductive strips with conductive movable contacts, power input connection assemblies with input conductive stationary contacts, wiring output assemblies, receptacle output assemblies with output stationary contacts, and a first short-circuit conductor and a second short-circuit conductor.