Retractor pretensioner assembly

A seatbelt pretensioning retractor assembly including a spindle and a frame for use in a vehicle, the seatbelt pretensioning retractor assembly comprising:

• a housing adapted for being mounted to the frame and having an interior cavity;
• a tube having an arcuate and curved shape having a first tube end in fluid communication with a gas generator and an exit in fluid communication with the interior cavity of the housing;
• a sprocket rotatably mounted to the housing and fixedly coupled to the spindle adapted for taking up seatbelt webbing during pretensioning;
• a polymer rod disposed within the tube and having a proximal end disposed towards the gas generator and a distal end disposed away from the gas generator;
• and
• a guide plate placed in the housing, the guide plate having a guide portion disposed on an opposite side of the sprocket from the exit of the tube and a rod guide disposed on the exit of the tube for preventing the polymer rod from trapping before engaging with the sprocket or after pretensioning.