Patent ID: 8651442
Filing Date: 2014-02-18
Classification: H02B

Abstract:
1. A rail attachment structure of an electric device for attaching an electric device to a rail, comprising: a housing for the electric device, having a bottom, an upper end projecting outwardly from the bottom, and a lower end projecting outwardly from the bottom at a side opposite to the upper end; first and second fitting portions arranged in a hook shape on the upper and lower ends of the housing of the electric device and facing each other, the first fitting portion fittingly engaging one rail edge of the rail in a width direction and the second fitting portion fittingly engaging another rail edge of the rail in the width direction; a pair of spring locking portions spaced apart from each other and projecting from the upper end toward the lower end to form a space with respect to the bottom; and a linear spring bent in a mountain shape disposed on the bottom of the housing and retained by the pair of spring locking portions, the linear spring partially abutting against the upper end of the housing, wherein the linear spring elastically deforms to reduce an inclination angle of the mountain shape by contacting an end surface of the one rail edge engaged to the first fitting portion; an urging force of the linear spring is applied between the upper end and the rail such that the other rail edge is pressed by the second fitting portion; the linear spring further includes a locked portion bent in a concave shape and arranged on a top portion of the mountain-shape linear spring; and a horizontal deviation preventing portion is disposed on the upper end between the pair of spring locking portions to project toward the lower end of the housing and is able to contact an inside of the locked portion.