Holder for a support arm system

A holder (10) for a support arm system, the holder comprising:

• a fastening section with a receptacle (11) into which a profiled support element (30) is inserted and fastened on the holder (10);
• the receptacle (11) having a support section (19) and a regulating area (18) adjoining the support section (19), the support section (19) having a portion matched to and extending around the outer circumference of the profiled support element (30), and the regulating area (18) being wider in cross section than the support section (19) and into which the profiled support element (30) extends;
• the support section (19) including a sealing receptacle (17) and a seal (20) disposed in the sealing receptacle, the seal (20) resting sealingly against the outer circumference of the profiled support element (30);
• the support section (19) with the regulating area (18) forming a pivot seat for an end of the profiled support element (30), wherein the end of the profiled support element (30) rotates about an axis at the support section (19);
• and
• at least one actuating member (40) in combination with the end of the profiled support member (30) for fixing the profiled support element (30) in place in the regulating area (18).