Webbing Retractor

A webbing retractor provided with a lock mechanism, comprising;

• a bobbin having a drum portion and a pair of flanges arranged on opposite ends of said drum, said flanges defining grooves formed in a mutually-opposing relationship and angularly extending over a groove length in a webbing-releasing direction as a first direction of rotation;
• a webbing-holding member extending between said grooves;
• and
• a webbing secured at one end thereof in said bobbin, wound back about said webbing-holding member at a first portion thereof apart from said one end thereof toward an opposite end thereof, and then wound in layers around said drum portion in said first direction of rotation at a second portion thereof closer to said opposite end than said first portion, wherein said webbing is first wound on said drum portion of said bobbin in a webbing-winding direction as a second direction of rotation, said webbing-winding direction being opposite to said first direction of rotation, wound back about said webbing-holding member and then wound in layers on said drum portion.

A webbing retractor provided with a lock mechanism, comprising;

• a bobbin having a drum portion and a pair of flanges arranged on opposite ends of said drum, said flanges defining grooves formed in a mutually-opposing relationship and angularly extending over a groove length in a webbing-releasing direction as a first direction of rotation;
• a webbing-holding member extending between said grooves;
• and
• a webbing secured at one end thereof in said bobbin, wound back about said webbing-holding member at a first portion thereof apart from said one end thereof toward an opposite end thereof, and then wound in layers around said drum portion in said first direction of rotation at a second portion thereof closer to said opposite end than said first portion, wherein each of said paired flanges is additionally provided with an inlet channel extending between a leading end of said groove and an outer periphery of said flange, and said inlet channel has a width great enough to permit introduction of a corresponding end portion of said webbing-holding member into the groove.

A webbing retractor provided with a lock mechanism, comprising;

• a bobbin having a drum portion and a pair of flanges arranged on opposite ends of said drum, said flanges defining grooves formed in a mutually-opposing relationship and angularly extending over a groove length in a webbing-releasing direction as a first direction of rotation;
• a webbing-holding member extending between said grooves;
• and
• a webbing secured at one end thereof in said bobbin, wound back about said webbing-holding member at a first portion thereof apart from said one end thereof toward an opposite end thereof, and then wound in layers around said drum portion in said first direction of rotation at a second portion thereof closer to said opposite end than said first portion, wherein the distance of a central axis of a leading end portion of each groove from a central axis of rotation of said bobbin is shorter than the distance of a central axis of a remaining portion of said groove from said central axis of rotation of said bobbin.

A webbing retractor provided with a lock mechanism, comprising;

• a bobbin having a drum portion and a pair of flanges arranged on opposite ends of said drum, said flanges defining grooves formed in a mutually-opposing relationship and angularly extending over a qroove length in a webbing-releasing direction as a first direction of rotation;
• a webbing-holding member extending between said grooves;
• and
• a webbing secured at one end thereof in said bobbin, wound back about said webbing-holding member at a first portion thereof apart from said one end thereof toward an opposite end thereof, and then wound in layers around said drum portion in said first direction of rotation at a second portion thereof closer to said opposite end than said first portion, wherein said webbing extends about said drum portion in said first direction of rotation over a predetermined length beyond the position of said webbing-holding means, is folded back toward a side of a central axis of said bobbin, is wound back inwardly about said webbing-holding member, and is wound in layers around said drum portion in said first direction of rotation.

A webbing retractor provided with a lock mechanism, comprising;

• a bobbin having a drum portion and a pair of flanges arranged on opposite ends of said drum, said flanges defining grooves formed in a mutually-opposing relationship and angularly extending over a qroove length in a webbing-releasing direction as a first direction of rotation;
• a webbing-holding member extending between said grooves;
• and
• a webbing secured at one end thereof in said bobbin, wound back about said webbing-holding member at a first portion thereof apart from said one end thereof toward an opposite end thereof, and then wound in layers around said drum portion in said first direction of rotation at a second portion thereof closer to said opposite end than said first portion, wherein said webbing extends about said drum portion in said first direction of rotation over a predetermined length beyond the position of said webbing-holding means, is folded back to a side opposite to a central axis of said bobbin, is wound back outwardly about said webbing-holding member, and is then wound in layers around said drum portion in said first direction of rotation.

A webbing retractor provided with a lock mechanism, comprising;

• a bobbin having a drum portion and a pair of flanges arranged on opposite ends of said drum, said flanges defininq grooves formed in a mutually-opposing relationship and angularly extending over a groove length in a webbing-releasing direction as a first direction of rotation;
• a webbing-holding member extending between said grooves;
• and
• a webbing secured at one end thereof in said bobbin, wound back about said webbing-holding member at a first portion thereof apart from said one end thereof toward an opposite end thereof, and then wound in layers around said drum portion in said first direction of rotation at a second portion thereof closer to said opposite end than said first portion, wherein each groove extends through the corresponding flange in the direction of the thickness of said flange and is provided with plural ribs extending substantially in radial directions and arranged at intervals in an angular direction.

A webbing retractor provided with a lock mechanism, comprising;

• a bobbin having a drum portion and a pair of flanges arranged on opposite ends of said drum, said flanges defining grooves formed in a mutually-opposing relationship and angularly extending over a qroove length in a webbing-releasing direction as a first direction of rotation;
• a webbing-holding member extending between said grooves;
• and
• a webbing secured at one end thereof in said bobbin, wound back about said webbing-holding member at a first portion thereof apart from said one end thereof toward an opposite end thereof, and then wound in layers around said drum portion in said first direction of rotation at a second portion thereof closer to said opposite end than said first portion, wherein said drum portion and said paired flanges are connected rotatably relative to each other via energy-absorbing mechanisms, respectively.