Connecting unit for components in a breathing system

1. An assembly plate for a breathing system, said assembly plate comprising:

a connecting unit including a plug adapter;

a sealing element arranged in a groove of said plug adapter and being configured to peripherally seal said plug adapter on a receiving bore of said assembly plate;

said sealing element being made of elastic, deformable material and having a first peripheral fastening thickening and a second peripheral fastening thickening arranged at a distance from said first fastening thickening;

said sealing element further including an undercut arranged between the first and second fastening thickenings and configured as a deformation zone;

said second fastening thickening of said sealing element having an outer lead-in chamfer configured for said receiving bore;

said undercut being insertable into said receiving bore;

said undercut having a first section having mutually parallel spaced wall surfaces and a second section having a trapezoidally-shaped cross-sectional contour extending between said parallel spaced wall surfaces;

said receiving bore having a first end, a second end, and an inner surface that extends from the first end to the second end;

said receiving bore being positioned between and abutting the parallel spaced wall surfaces and the inner surface extending over the trapezoidally-shaped cross-sectional contour and forming a void between the inner surface and a surface of the trapezoidally-shaped cross-sectional contour;

said undercut and said inner surface forming said deformation zone; and,

said plug adapter being self-centering in said receiving bore,

wherein said receiving bore has a material thickness (m 3 ); and,

wherein said first and second fastening thickenings define an inner distance (A 1 ) in said first section which is less than said material thickness (m 3 ).

2. The connecting unit of claim 1 , wherein:

said first fastening thickening has a material thickness (m 1 );

said second fastening thickening has a material thickness (m 2 ); and,

said material thickness (m 1 ) of said first fastening thickening is at least three times greater than said material thickness (m 2 ) of said second fastening thickening.

3. The connecting unit of claim 1 , wherein:

said first fastening thickening has an outer diameter (D 1 );

said second fastening thickening has an outer diameter (D 2 ); and,

said outer diameter (D 1 ) of said first fastening thickening is greater than said outer diameter (D 2 ) of said second fastening thickening.

4. The connecting unit of claim 1 , wherein said sealing element is affixed to said plug adapter such that growth of bacteria in said groove is prevented.

5. The connecting unit of claim 4 , wherein said sealing element is vulcanized into said plug adapter.