초록 ▼

A take-up mechanism for the seat belt of a vehicle comprises an automatic belt winding assembly having a reel with a reel shaft for dispensing and rewinding the belt. A pull-up assembly for rewinding a belt of the winding assembly includes a rotary piston motor drivable by pressurized gas, usually g

A take-up mechanism for the seat belt of a vehicle comprises an automatic belt winding assembly having a reel with a reel shaft for dispensing and rewinding the belt. A pull-up assembly for rewinding a belt of the winding assembly includes a rotary piston motor drivable by pressurized gas, usually generated from a pyrotechnic charge, and a ring which is co-rotatably connected to a rotary vane of the motor. The ring is coupleable to the reel shaft of the automatic winding assembly by engagement of a blocking element with a notched wheel co-rotatably mounted to the reel shaft. A sensor element is engageable with the notched wheel upon abrupt movement of the vehicle to block rotation of the reel in the dispensing direction. A control disc is rotatable with respect to the notched wheel and is engaged with the blocking element for moving the blocking element to engage the notched wheel upon the occurrence of either an abrupt vehicle motion or when the belt is moved in the dispensing direction abruptly. A locking mechanism is provided for preventing rotation of the ring in the belt dispensing direction.

대표청구항 ▼

A take-up mechanism for a safety belt of a vehicle, comprising: a housing; a belt reel having a co-rotating reel shaft rotatably mounted to said housing in a belt take-up direction and an opposite belt extension direction; automatic belt winding means operatively connected to said reel for urging sa

A take-up mechanism for a safety belt of a vehicle, comprising: a housing; a belt reel having a co-rotating reel shaft rotatably mounted to said housing in a belt take-up direction and an opposite belt extension direction; automatic belt winding means operatively connected to said reel for urging said reel to rotate in said take-up direction; a notched wheel co-rotatably connected to said reel shaft; a rotary piston motor with an abutment connected to said housing, a rotary vane rotatably mounted to said housing in said take-up direction and defining a chamber with said abutment, and gas pressure means for pressurizing the chamber to rotate said rotary vane upon activation of said gas pressure means by the occurrence of an abrupt vehicle motion; a ring co-rotably connected to said rotary vane; vehicle sensitive blocking means including a stop element movable to engage said notched wheel and stop rotation of said shaft in said belt extension direction upon the occurrence of an abrupt vehicle motion; a control disc rotatably mounted to said housing and rotatable upon at least one of the occurrence of an abrupt vehicle motion and an abrupt motion of said reel shaft in said extension direction; at least one blocking element movably mounted to said ring and operatively engaged with said control disc for engagement with said notched wheel upon rotation of said control disc so that an abrupt vehicle motion which activates said gas pressure means causes engagement of said ring to said notched wheel over said at least one blocking element to rotate said notched wheel and connected reel shaft in said take-up direction; and locking means engaged between said housing and said ring for preventing rotation of said ring in said extension direction.