Quick connector with bayonet locking

1. An air conditioning line system in an aircraft, comprising:

tube-shaped or sleeve-shaped connecting sections ( 12 , 16 ) disposed on the respective bodies which can be plugged into one another;

at least one radial locking projection ( 18 ) disposed on the connecting section ( 12 ) of a first body ( 10 );

at least one locking recess ( 22 ) disposed on the connecting section ( 16 ) of a second body ( 14 ), the locking recess ( 22 ) being completely surrounded by a rim, wherein the at least one locking projection and the at least one locking recess are constructed and coordinated with one another in such a way that, in a first rotational position for locking of the two bodies, each locking projection engages in an associated locking recess while securing the two bodies against axial withdrawal from one another;

at least one axially extending lead-in groove ( 24 ) associated with each locking recess ( 22 ) which is provided so as to be angularly offset in the peripheral direction in relation to the appertaining locking recess and which is open toward the direction of the leading plug-in end of the second body, whereby the lead-in groove reaches axially, at least substantially, as far as the appertaining locking recess in such a way that in a relative lead-in rotational position of the two bodies in which each locking projection lies, in the peripheral direction, in a manner overlapping with an associated lead-in recess, easy-action axial insertion of the two bodies in one another as far as a second rotational position preparatory to locking is made possible;

a peripheral, oblique run-up face ( 20 ) disposed on each locking projection ( 18 ) which engages the connection section ( 16 ) of the second body ( 14 ) to allow rotation of the second body ( 14 ) in a first direction relative to the first body ( 10 ) as the second body ( 14 ) rotates from the second rotational position preparatory to locking to the first rotational position for locking;

a face ( 21 ) disposed on each locking projection ( 18 ) on a peripheral side of the locking portion ( 18 ) adjoining the peripheral oblique run-up face ( 20 ), wherein the face ( 21 ) extends generally perpendicularly from the connecting section ( 12 ) of the first body ( 10 ); and

at least one releasing groove ( 26 ) associated with each locking recess ( 22 ) disposed on the connecting section ( 16 ), which is provided in a manner angularly offset in the peripheral direction in relation to the appertaining locking recess and is disposed on the side of the locking recess ( 22 ) opposite to the respective lead-in groove ( 24 ) and which likewise is open toward the direction of the leading plug-in end of the second body ( 14 ) and reaches axially, at least substantially, as far as the appertaining locking recess ( 22 ), in such a way that in a relative releasing rotational position of the two bodies ( 10 , 14 ) in which each locking projection lies, in the peripheral direction, in a manner overlapping with an associated releasing groove, easy-action axial pulling-apart of the two bodies, starting from a third position preparatory to release, is made possible, and the two bodies ( 10 , 14 ) can be transferred from the first rotational position for locking to the third rotational position preparatory to release by engaging the oblique run-up face ( 20 ) with the connecting section ( 16 ) of the second body ( 14 ) and rotating the second body ( 14 ) in the first direction relative to the first body ( 10 ),

wherein the face ( 21 ) of the locking projection 18 prevents rotation of the second body ( 14 ) in a second direction of rotation opposite to the first direction of rotation relative to the first body ( 10 ) when the locking projection ( 18 ) is disposed in the first, second, or third rotational positions.

2. The system of claim 1 , wherein each locking recess ( 22 ), each lead-in groove, and each releasing groove ( 26 ) extends right through the wall of the connecting section ( 16 ) of the second body ( 14 ).

3. The system of claim 1 , wherein each locking recess, each lead-in groove ( 24 ), and each releasing groove ( 26 ) extends, at least in certain regions, through the wall of the connection section ( 16 ) of the second body ( 14 ) only over part of the thickness of said wall.

4. The system of claim 1 , wherein the first body ( 10 ) is designed with a total of two diametrically opposed locking projections ( 18 ), and the second body ( 14 ) is likewise designed with a total of two diametrically opposed locking recesses ( 22 ), two lead-in grooves ( 24 ), and two releasing grooves ( 26 ).

5. The system of claim 1 , wherein the first body is a pipe ( 10 ) and the second body is a sealing cap ( 14 ) which is to be placed on said pipe.

6. The system of claim 1 , wherein the first body is a pipe ( 10 ) and the second body is a coupling piece ( 28 a ) which serves to connect this pipe to another pipe.

7. The system of claim 6 , wherein the coupling piece ( 28 a ) has a flexible bellows-type section ( 32 a ) which is adjoined, on each of its two sides, by rigid connecting section ( 30 a ).

8. The system of claim 1 , wherein one of the bodies is a flexible hose ( 34 b ), but its connecting section ( 36 b ) is manufactured from a rigid material.