Provided are a seat belt retractor and a seat belt apparatus, which can reduce the emanation of abutment noise upon switching of a clutch. The processor may be configured to receive indications of context associated with a user, determine a destination for the user based on the context and user information, provide for a presentation of guidance instructions to guide the user to the destination, and reveal the destination to the user only when the user is proximate to the destination. A guard structure coupled to the frame can include a substantially continuous body as well as a gripping portion for the patient and attendant.