| 摘要 |
[Object] To realize the proper meshing between a plurality of internal teeth and external teeth corresponding thereto more effectively with a simple movement of a spool. [Solution] In the case of an emergency, external teeth 12b of a pawl 12 provided at a right side end of a spool 9 are made to mesh with some of internal teeth 8c provided on a frame 8, and, with a load acting on a seat belt 4, a left side end of the spool 9 is brought into contact with a spool guide 8h. Since the left side end of the spool 9 tends to be moved further in a direction of seat belt load ³ with the load acting on the seat belt 4, the spool guide 8h brings one external tooth 9c 1 provided at the left side end of the spool 9 into contact with one target internal tooth 8e 1 provided on the frame 8. Hence, some of external teeth 9c provided on the spool 9 are made to mesh properly with the respective internal teeth 8e more effectively. Thus, some of the external teeth 9c of the spool 9 effectively come into mesh with the respective internal teeth 8e of the frame 8 with a simple movement of the spool 9. |
