公开(公告)号：US06431485B1

公开(公告)日：2002-08-13

申请号：US09772248

申请日：2001-01-29

申请人： Sadaaki Mitsuo ,  Masahito Wakahara ,  Norikazu Akamatsu ,  Kazuhiro Osaki

发明人： Sadaaki Mitsuo ,  Masahito Wakahara ,  Norikazu Akamatsu ,  Kazuhiro Osaki

IPC分类号： B60R2244

摘要： An automotive seatbelt take-up device has a primary spiral spring biasing a take-up shaft in a seatbelt take-up direction. A spring clutch transfers rotation of the take-up shaft in a seatbelt drawing-out direction to a ring. A secondary spiral spring is capable of generating rotational biasing force on the take-up shaft in a direction opposite that of the primary spiral spring. Thus, the present invention provides an automotive seatbelt take-up device that can reduce both the drawing-out force and the take-up force of a seatbelt when the seatbelt is being worn.