Patent ID: 8348307

Claim:
A seatbelt device comprising: a refractor frame; a spindle attached to the retractor frame and freely rotating with respect thereto, a webbing wound around an outer periphery of the spindle; a lock member rotatable relative to the retractor frame and configured to be locked to the retractor frame during an emergency; emergency locking means for preventing the spindle from rotating in a webbing unreeling direction during the emergency by engaging the lock member with the retractor frame; a first energy absorbing member attached to the spindle at one axial end portion and attached to the lock member at an opposing axial end portion, said first energy absorbing member being configured to absorb an impact energy by undergoing twisting deformation when a load of at least a predetermined value acts on the spindle in the webbing unreeling direction while the lock member is locked by the emergency locking means during the emergency, thereby permitting relative rotation between the spindle and the lock member; and a second energy absorbing member that is formed in one of a strip form and a wire form and wound around an outer peripheral surface of the spindle, the second energy absorbing member having a returnly bent portion adjacent to an end portion fixed to the spindle and another portion accommodated in a bend route provided in the lock member, such that the second energy absorbing member passes through the bend route when the spindle rotates in accordance with the twisting deformation of the first energy absorbing member while the lock member is locked during the emergency, thereby undergoing local plastic deformation so as to absorb the impact energy, and wherein a deformation portion deforms when the spindle rotates while the lock member is locked during the emergency, the deformation portion being provided between a portion of the spindle and the returnly bent portion of the second energy absorbing member.