Curtain airbag, curtain airbag apparatus, and method for manufacturing curtain airbag apparatus

A method for manufacturing a curtain airbag apparatus including a curtain airbag that is folded and stored in an upper portion of a vehicle body under normal circumstances, and that is inflated and expanded along a side window in emergency situations, and an inflator configured to supply gas to the curtain airbag,

• the curtain airbag including
• a front chamber configured to be inflated and expanded along the side window of a front seat of the vehicle body;
• a first gas supply port configured to supply the gas to the front chamber, the first gas supply port being disposed at an upper portion of the front chamber;
• a sub-chamber that is smaller than the front chamber and that is disposed above the front chamber;
• and
• a second gas supply port that is disposed rearward of the sub-chamber, said second gas supply port communicating with the first gas supply port, and being narrower than the first gas supply port,
• the method comprising:
• folding the sub-chamber on a front surface of the front chamber on a side facing an interior of the vehicle body at a portion of the second gas supply port;
• and
• folding a folded body obtained by the sub-chamber folding step, into a state where the folded body can be stored in the upper portion of the vehicle body,
• wherein the curtain airbag includes a tether including a first end portion connected to a front of the sub-chamber, and a second end portion connected to a front of the front chamber,
• the method further comprises sewing the first end portion of the tether to the sub-chamber before the sub-chamber folding step, and sewing the second end portion of the tether to the front chamber after the sub-chamber folding step.

A curtain airbag that is folded and stored in an upper portion of a vehicle body under normal circumstances, and that is inflated and expanded along a side window in emergency situations, the curtain airbag comprising:

• a front chamber configured to be inflated and expanded along the side window of a front seat of the vehicle body;
• a first gas supply port configured to supply gas to the front chamber, the first gas supply port being disposed at an upper portion of the front chamber;
• a sub-chamber that is smaller than the front chamber and that is disposed above the front chamber;
• a second gas supply port that is disposed rearward of the sub-chamber, said second gas supply port communicating with the first gas supply port, and being narrower than the first gas supply port, and
• a non-inflatable portion disposed on a boundary line partitioning the front chamber and the sub-chamber,
• wherein the sub-chamber is stored in a state of being folded on a front surface of the front chamber on a side facing an interior of the vehicle body at a portion of the second gas supply port, said sub-chamber being folded before the front chamber is folded.