Abstract: Disclosed is a load limiter mounted within a cylindrical spool on which a webbing is wound to constrain a load applied to the webbing from exceeding a preset load, the load limiter including: a first torsion bar inserted into a hollow portion formed at a center of the spool and one end of which is coupled to one end of the spool; and a second torsion bar one end of which is connected to an opposite end of the first torsion bar to be inserted into the hollow portion of the spool together with the first torsion bar and an opposite end of which is coupled to a locker installed at an opposite end of the spool, wherein the torsion bar is configured such that a torsion load limit of the first torsion bar is smaller than a torsion load limit of the second torsion bar.

Abstract: The present invention relates to a buckle including a frame, a tongue inserted into the frame and locked with the frame, an ejector provided in the frame to push the tongue outward from the frame, a holder that prevents the ejector from pushing the tongue outward from the frame by being displaced forward the ejector, thereby maintaining locking of the tongue, and a withdrawal prevention unit that prevents the holder from moving back beyond withdrawing and being displaced backward the ejector when an impact is applied from an outside of the frame, thereby preventing the locking of the tongue from being released by the impact.