Vacuum chamber for vacuum oven

摘要

The contact support (17) carries a movable contact with a bellows, whose one end is vacuum tightly coupled the contact support, while the other end is connected to front side floor or lid wall (13). There is a twist protection preventing the contact support twisting with respect to the floor or lid wall. The contact support passes through the guide portion (15) located at the floor or lid wall, in which it slides and is positively protected against twisting. Preferably the contact support has at least one groove or ledge (22,23), which engages a matching groove or ledge (24,25) in the guide portion.