MAINTAINING BIASING STATE OF BIASING FORCE APPLICATION MEANS DURING ASSEMBLY OF A SEAT BELT RETRACTOR

摘要

The inner end 8a of a power spring 8 of the biasing force application means 5 is retained by a bush 9 which fits over the reel shaft, and the outer end 8b is retained by a retaining portion (10d, Fig. 11) of a spring casing 10. In a state where the biasing force application means 5 is formed as a subassembly and the power spring 8 has been wound up by a predetermined amount in a direction in which a webbing (3, Fig. 3) is unwound, a spring pin 12 is attached to the subassembly so that a pair of rotation preventing arms 12a and 12b thereof pierce through small holes 11b and 11c provided in a cover 11, either of grooves 9b and 9c and either of grooves 9d and 9e, which are provided in the bush 9, and small holes 10b and 10c provided in the spring casing 10. This enables the power spring 8 to be readily maintained in the wound-up state during assembly of the subassembly to the frame and to reel shaft of the seat belt retractor. Many other details are disclosed, including means for locking the reel shaft in response to excessive deceleration. IMAGE