Negative pole line connecting device

The utility model discloses a negative pole line connecting device, including first retaining member, second retaining member and pretension connecting piece, first retaining member can be locked with disassembling and establish on the frame, and the second retaining member is established with the removable unblock of negative pole line, pretension connecting piece and first retaining member or second retaining member movable mounting are equipped with first screw thread in together on this pretension connecting piece, be equipped with on second retaining member or the first retaining member can with the second screw thread of the mutual adjustable spiro union of this first screw thread. Connecting frame and negative pole line can be disassembled respectively through first, second retaining member to this novel device, realize the solderless connection between negative pole line and frame, connect through a pretension connecting piece between first, second retaining member simultaneously, reach negative pole line pretension purpose, when adjusting the take -up of negative pole line in addition and spending, only need simple rotatory pretension connecting piece can, pretension and taut adjustment are all very simply convenient. This novel device has had solderless connection and the simple adjustable characteristics of pretension concurrently, realizes that a thing is multi -purpose, and functional and the practicality is strong.