Device for fastening an electrical apparatus

摘要

Fastening device for an electrical apparatus (10) whose base (20) has a central clearance (60) shaped to fit a support rail (50) and delimited on one side by an open slide rail (61) into which one of the edges (54) of the support rail can be fitted while the other edge of the support rail (55) can be held by retaining hooks (24c), characterized in that: the base (20) is formed out of an extruded part, the device comprises at least one deflection spring (70) that inserts smoothly into the slide rail (61) so that the length of the spring runs more or less along the length of the slide rail, the deflection spring (70) being a leaf spring with one contact surface (73) capable of pressing against the cant (56) of one edge (54) of the rail.