Gas generator

Abstract

A gas generator, especially for a vehicle safety system, has a pyrotechnical igniter unit ( 22 ) and a holder ( 14 ) for the igniter unit ( 22 ). The igniter unit ( 22 ) is attached to the holder ( 14 ) in that the igniter unit ( 22 ) and the holder ( 14 ) are encapsulated together by one of injection molding and foaming of a plastic. The holder ( 14 ) has at least one passage opening ( 30, 38 ) for the plastic during the encapsulation by one of injection molding and foaming, the at least one opening being configured in such a way as to create a form-fitting anti-twist protection between the plastic ( 34 ) and the holder ( 14 ).

1 . A gas generator, especially for a vehicle safety system, having
 a pyrotechnical igniter unit ( 22 ) and   a holder ( 14 ) for said igniter unit ( 22 ),   said igniter unit ( 22 ) being attached to said holder ( 14 ) in that said igniter unit ( 22 ) and said holder ( 14 ) are encapsulated together by one of injection molding and foaming of a plastic,   said holder ( 14 ) having at least one passage opening ( 30 ,  38 ) for said plastic during said encapsulation by one of injection molding and foaming, said at least one opening being configured in such a way as to create a form-fitting anti-twist protection between said plastic ( 34 ) and said holder ( 14 ).   
     
     
         2 . The gas generator according to  claim 1 , wherein said passage opening ( 30 ) is out-of-round. 
     
     
         3 . The gas generator according to  claim 1 , wherein said passage opening ( 30 ) has a notch ( 32 ) protruding laterally outwards. 
     
     
         4 . The gas generator according to  claim 1 , wherein several passage openings ( 30 ,  38 ) are provided. 
     
     
         5 . The gas generator according to  claim 1 , wherein a central passage opening ( 30 ) is provided. 
     
     
         6 . The gas generator according to  claim 1 , wherein said holder ( 14 ) is a section of an outer housing ( 10 ) of said gas generator. 
     
     
         7 . The gas generator according to  claim 1 , wherein igniter contacts ( 24 ) of said igniter unit ( 22 ) protrude through said holder ( 14 ). 
     
     
         8 . The gas generator according to  claim 7 , wherein said igniter contacts ( 24 ) are part of said igniter unit ( 22 ) and form a prefabricated unit together with said igniter unit ( 22 ).