| 摘要 |
PROBLEM TO BE SOLVED: To relieve impact force to an occupant, and to reduce webbing restricting force and deceleration by operating first resistance force on a ring member in a section up to a prescribed position from a starting position of relative rotation of the ring member to a frame, and operating second resistance force in the whole section up to a finish position from the starting position of the relative rotation. SOLUTION: First resistance force f1 operates since a first resistance member 46 is plastically deformed when a ring member 43 rotates in the anticlockwise direction after a positioning pin 33 ruptures when a load operates on webbing 2 in a state of locking a reel shaft 14 on the ring member 43. At the same time, second resistance force f2 operates since a wire 49 is rewound from a shaft 68 while being deformed by a winding checking member 48 when the wire 49 of a second resistance member 47 is started to be wound round a wire housing groove 71. Pulling-out of the webbing 2 is finished since third fixing part 74 stops rotation by striking on a stopper 78 when the ring member 43 rotates in the anticlockwise direction by about 330 deg.. An increase in restricting force and deceleration can be restrained by effectively absorbing impact energy in its early stages. |
