Patent ID: 8608101

Claim:
A locking member mounting structure coupled to one side of a guide drum of a seat belt retractor, the locking member mounting structure comprising: a locking base; a locking clutch rotatably coupled to one side surface of the locking base; a lock arm coupled to one side surface of the locking clutch so as to rotate at a predetermined angle; a boss formed on the locking clutch and defining a rotational center of the lock arm; a plurality of stoppers formed on the locking clutch and limiting rotation of the lock arm by interfering engagement with an end of the lock arm so as to define the predetermined angle of the lock arm; a second boss extending from a center of the locking clutch; a mechanism cover having protrusions configured to interact with an end of the lock arm; and a spring for recovering the lock arm, the spring having a first end portion in fixed engagement with one of the plurality of stoppers of the locking clutch and a second end portion freely engaged with the locking arm and having a middle portion between the first portion and the second portion, the middle portion having a circular shape and the circular shape extending around an outer circumference of the boss defining the rotational center of the lock arm, the first end portion being fixedly coupled to the one of the plurality of stoppers that blocks counterclockwise rotation of the lock arm by direct engagement with the end of the lock arm that interacts with the protrusion of the mechanism cover, and wherein the second portion of the spring is engaged with the lock arm so as to rotate in accordance with rotation of the lock arm.