Rotation damper

Abstract

A rotation damper, particularly for damping the rotary movement of a belt retractor shaft of a vehicle safety belt, has a housing which delimits a working space filled with a damping medium, and an element which is rotatable relative to the housing. Several pins serving as resistance elements, which extend into the working space, are provided on the element.

1 . A rotation damper, particularly for damping the rotary movement of a belt retractor shaft ( 2 ) of a vehicle safety belt, comprising: 
 a housing ( 14 ) which delimits a working space ( 12 ) filled with a damping medium,    an element which is rotatable relative to the housing ( 14 ), and    several pins ( 20 ) serving as resistance elements, which are provided on the element and extend into the working space ( 12 ).    
   
   
       2 . The rotation damper according to  claim 1 , wherein the pins ( 20 ) extend in the axial direction (A) of the housing ( 14 ).  
   
   
       3 . The rotation damper according to  claim 1 , wherein the pins ( 20 ) are arranged on the element so as to be displaceable relative to the housing ( 14 ).  
   
   
       4 . The rotation damper to  claim 1 , wherein the element has a disc ( 18 ) on which the pins ( 20 ) are arranged.  
   
   
       5 . The rotation damper according to  claim 1 , wherein a drive ( 34 ) is provided for an axial displacement of the pins ( 20 ) relative to the housing ( 14 ).  
   
   
       6 . The rotation damper according to  claim 5 , wherein the drive ( 34 ) has a motion thread ( 42 ).  
   
   
       7 . The rotation damper according to  claim 1 , wherein the element is a shaft ( 16 ) and the pins ( 20 ) extend radially to the shaft ( 16 ).  
   
   
       8 . The rotation damper according to  claim 7 , wherein the pins ( 20 ) have formed-on lips ( 22 ) of a flexible material with an indentation ( 24 ) arranged between them.  
   
   
       9 . The rotation damper according to  claim 7 , wherein the shaft ( 16 ) is surrounded by a ring ( 26 ) which is arranged inside the working space ( 12 ) and is coupled to the shaft ( 16 ) via a spring element ( 30 ).  
   
   
       10 . The rotation damper according to  claim 8 , wherein the ring ( 26 ) has spreading elements ( 32 ) which can penetrate into the indentations ( 24 ) of the pins ( 20 ) in the case of a relative rotation between the shaft ( 16 ) and the ring ( 26 ).  
   
   
       11 . The rotation damper according to  claim 9 , wherein the ring ( 26 ) has recesses ( 28 ) through which the pins ( 20 ) are guided.