Belt retractor with a device for sensing the length of belt webbing withdrawn

摘要

Belt retractor (1) with a device for sensing the length of belt webbing withdrawn and a in a roller frame (4) rotatably mounted belt shaft (3), on which the strap (10) can be wound, wherein the means a by the rotation of the belt spool (3) moving cam plate (11) comprises, on which a the housing of the belt retractor (1) is associated with the displaceable cam (15) is spring-loaded, and the cam (15) a by the movement of the cam plate (11) forced movement, and the position of the cam (15) by means of a sensor device (22), can be sensed, characterized in that the cam plate (11) a portion (11b), to which the cam (15) during the execution of the forced movement is applied, and the portion (11b) has a contour of a type that the movement of the cam (15) decreases with increasing length of belt webbing withdrawn.