Electrical conduction mechanism

摘要

An electrical conduction mechanism is provided to prevent dust or from adhering to the inside of an electrical-conduction portion main body, so that electrical conduction efficiency cannot be reduced. The electrical conduction mechanism comprises an electrical-conduction portion main body in the center of which a first through-hole to be inserted through by a shaft is formed and in which a second through-hole communicating with the first through-hole is formed in a direction perpendicular to a direction in which the first through-hole is formed. The electrical-conduction element is disposed in the second through-hole. The electrical-conduction element is configured to include an electrical-conduction chip abutting on the shaft, and a coil spring biasing the electrical-conduction chip toward the shaft, so that current is supplied to the shaft through the electrical-conduction chip to conduct electricity to the bit.

主权项

1. A sheet-metal puller comprising:
a first manipulating member provided with a bit which is disposed in a distal end portion of a shaft and which is configured to be weldable for attachment to a sheet-metal face; a supporting portion configured to support the first manipulating member; an electrical conduction mechanism; a power source cord for providing power to the electrical conduction mechanism; a second manipulating member configured to move the first manipulating member; a leg body configured to support the second manipulating member, wherein the first manipulating member is provided with the shaft with a handle for rotating the shaft at one end of the shaft; and the electrical conduction mechanism conducts electricity to the bit, characterized in that: the second manipulating member is connected to the power source cord; the electrical conduction mechanism includes an electrical-conduction portion main body which is formed as a conductive member with a first through-hole provided to receive the shaft, and in which at least one second through-hole is connected with the first through-hole in a direction perpendicular to a direction in which the first through-hole is formed; and at least one electrical-conduction element is disposed in the at least one second through-hole, wherein the at least one electrical-conduction element is configured to include at least one electrical-conduction chip abutting on the shaft, and at least one coil spring biasing the at least one electrical-conduction chip toward the shaft, so that current is supplied to the shaft through the at least one electrical-conduction chip to conduct electricity to the bit, wherein the electrical conduction mechanism is incorporated into the sheet-metal puller to provide electricity from the power source cord and attached to the second manipulating member to provide current to the shaft connected to the bit for welding the bit.