Switching device with a suspended mobile contact assembly

A switching device comprising:

• an outer casing defining an internal volume of said switching device;
• one or more electric poles, each electric pole comprising one or more mobile contacts and one or more fixed contacts adapted to be coupled or uncoupled during a switching operation of said switching device;
• a contact shaft accommodated in the internal volume of said switching device and adapted to rotate about a rotation axis during a switching operation of said switching device, said contact shaft having a shaped body comprising one or more contact seats adapted to accommodate at least partially said mobile contacts, so that said mobile contacts rotate with said contact shaft about said rotation axis during a switching operation of said switching device;
• a control mechanism for operating said contact shaft, said control mechanism comprising a supporting frame fixed to said outer casing to provide support to movable members of said control mechanism and one or more connecting rods to provide a force to move said contact shaft during a switching operation of said switching device;
• wherein the switching device comprises one or more coupling elements to support said contact shaft and provide a mechanical connection between said control mechanism and said contact shaft, said coupling elements comprising:
• a first coupling point, at which said coupling elements are fixed to said contact shaft, so that said coupling elements provide support to said contact shaft and maintain said contact shaft in relative position with respect to said outer casing;
• a second coupling point, at which said coupling elements are hinged with corresponding supporting frame portions of said supporting frame, so that said coupling elements provide a centre of rotation for said contact shaft about said rotation axis;
• a third coupling point, at which said coupling elements are hinged with corresponding connecting rods of said control mechanism, so that said connecting rods exert a force on said coupling elements to rotate said coupling elements and said contact shaft about said rotation axis, during a switching operation of said switching device,
• wherein said coupling elements are configured as a lever, in which said first coupling point is a point of said lever on which a mechanical load is applied, said second coupling point is a fulcrum point of said lever and said third coupling point is another point of said lever on which a force is applied.