JPH0328615B

In a swing bridge for conversion of rotary motion of an eccentric driven by a motor shaft into a reciprocating movement of the power output for a tool in electrically powered appliances, consisting of a bridge yoke comprising the power output and mounted on two strip-shaped film hinges and a connecting rod coupled to the swing bridge and the eccentric, aligned parallel to the bridge yoke, one of the strip-shaped film hinges and the corresponding wall of the bridge yoke are each provided with an opening through which the connecting rod is guided in such fashion that the connecting rod head coupled with the eccentric lies outside the space defined by the bridge yoke and the film hinge and whereby the bridge yoke forms a rigid unit with the formed walls.