Noiseless emergency locking type retractor

An emergency locking type retractor for a seat belt, comprising:

• a housing;
• a shaft rotatably received in said housing for selectively winding and unwinding the seat belt thereabout and therefrom;
• emergency locking means including a stand-man holder tightly held by said housing, a stand-man operatively held by said holder and a pivotal lever member, said pivotal lever member locking said shaft against rotation in a direction to draw the seat belt therefrom when said stand-man is inclined relative to said stand-man holder;
• and
• a structure mounted to said housing to define a sound insulating enclosed space in which said stand-man and said pivotal lever member are installed, said structure comprising;
• a box-like part of said stand-man holder in which said stand-man is operatively installed, said box-like part being of a double wall construction;
• a dust cover fixed to an inside surface of a wall of said housing for covering an opening formed in said wall of said housing, said opening being an opening through which a part of said emergency locking means is projected into said housing, said dust cover being of a double wall construction;
• and
• a sensor cover fixed to an outside surface of said wall for covering essential parts of said emergency locking means, said sensor cover being of a double wall construction.