Vacuum switch with a drive device and pole operating unit

A vacuum switch comprising:

• a) a vacuum switching tube having a movable operating plunger;
• b) a drive device adapted to provide an operating force for said vacuum switching tube;
• c) a pole operating unit, said pole operating unit
• i) receiving the vacuum switching tube at one of its ends, and
• ii) including
• A) a guide bolt adapted to linearly guide said operating plunger of said vacuum switching tube and adapted to transmit an operating force,
• B) a carrier, said carrier being a U-shaped sheet metal part including a central part and two legs, a distance between said two legs can be extended by elastic bending, each of said two legs having aligned elongated holes which receive ends of the guide bolt, each of said two legs having a second hole;
• C) a lever arrangement which changes the direction of movement of the drive device, and
• D) a connection device, said connection device connecting said movable operating plunger of said vacuum switching tube to an external conductor, and connecting and strengthening said two legs of said carrier;
• d) a support insulator connecting said drive device to said carrier and being attached, by one of its ends, to said central part of said carrier;
• e) an insulating coupling rod connecting said drive device to said direction-changing lever arrangement;
• f) a contact force spring adapted to be tensioned when said vacuum switching tube is switched on;
• and
• g) a counter-bearing, said counter-bearing
• i) supporting one end of said contact force spring,
• ii) fixed between said two legs of said carrier,
• iii) being plate-shaped,
• iv) having a width which corresponds to the distance between said legs in an unbent state, and
• v) having pins arranged on its narrow sides, said pins resting against said two legs of said carrier and engaging in said second holes of said two legs.