Webbing retractor

A webbing tractor comprising:

• a frame secured to a chassis of a vehicle;
• a takeup shaft supported on said frame, a webbing being wound around said takeup shaft;
• clamping means for clamping an intermediate portion of the webbing pulled out of said takeup shaft;
• supporting means for pivotally supporting said clamping means to said frame;
• actuating means for moving said clamping means in a webbing-clamping direction at the time of a sudden deceleration of the vehicle;
• and
• deforming means disposed in said clamping means and adapted to undergo deformation upon application by said clamping means of a clamping force exceeding a predetermined value to the webbing at the time of the sudden deceleration of the vehicle, so as to allow said clamping means to move in a direction in which a clamped state of the webbing is canceled, wherein said deforming means has a thin-walled portion proximate with said supporting means and which undergoes deformation by being pressed by said supporting means when a load exceeding a predetermined value is applied to said clamping means.

A webbing retractor comprising:

• a frame secured to a chassis of a vehicle;
• a takeup shaft supported on said frame, a webbing being wound around said takeup shaft;
• clamping means for clamping an intermediate portion of the webbing pulled out of said takeup shaft;
• supporting means for pivotally supporting said clamping means to said frame;
• actuating means for moving said clamping means in a webbing-clamping direction at the time of a sudden deceleration of the vehicle;
• and
• deforming means disposed in said clamping means and including a projection abutting against said supporting means, a thin-walled portion, and a gap portion, wherein said thin-walled portion pressed by said projection undergoes deformation and projects into said gap portion upon application of a force exceeding a predetermined value to said clamping means at the time of the sudden deceleration of the vehicle.

A locking device for locking an intermediate portion of a webbing pulled out of a webbing retractor, comprising:

• clamping means having a clamp lever provided with a webbing clamping portion at one end thereof, said clamping means being adapted to clamp an intermediate portion of the webbing;
• supporting means for supporting said clamping means to a frame of said webbing retractor rotatably about said supporting means;
• actuating means for moving said clamping means in a webbing-clamping direction at the time of a sudden deceleration of the vehicle;
• and
• deforming means disposed in said clamping means and including a projection abutting against said supporting means, a gap portion, and a thin walled portion adapted to undergo deformation upon application of a load thereto by said projection disposed adjacent to said thin-walled portion, wherein said thin-walled portion undergoes deformation and projects into said gap portion upon application of a force exceeding a predetermined value to said clamping means at the time of the sudden deceleration of the vehicle.