초록 ▼

A rotary tightening device for a safety belt has a belt retractor including a housing and a belt take-up shaft rotatably supported in the housing. The belt-take-up shaft has one end of the safety belt connected thereto. Upon triggering of the rotary tightening device, the belt take-up shaft is rotat

A rotary tightening device for a safety belt has a belt retractor including a housing and a belt take-up shaft rotatably supported in the housing. The belt-take-up shaft has one end of the safety belt connected thereto. Upon triggering of the rotary tightening device, the belt take-up shaft is rotated in a belt take-up direction of the safety belt. A drive wheel is connected to the shaft. The housing has a channel extending in a plane parallel to a radial plane of the drive wheel and extending at least partially about a circumference of the drive wheel. Mass bodies are positioned loosely adjacent to one another in the channel. The mass bodies, when accelerated, act on the drive wheel for driving it. The drive wheel has at the circumference a gearing in which the mass bodies are received for driving the drive wheel. A spacing of the gearing is substantially identical to a spacing between the mass bodies.

대표청구항 ▼

[ We claim:] [1.] A rotary tightening device for a safety belt, said rotary tightening device comprising:a belt retractor comprising a housing and a belt take-up shaft rotatably supported in said housing, said belt-take-up shaft having one end of the safety belt connected thereto and, upon triggerin

[ We claim:] [1.] A rotary tightening device for a safety belt, said rotary tightening device comprising:a belt retractor comprising a housing and a belt take-up shaft rotatably supported in said housing, said belt-take-up shaft having one end of the safety belt connected thereto and, upon triggering of said rotary tightening device, being rotated in a belt take-up direction of the safety belt;a drive wheel connected to said shaft;said housing having a channel extending in a plane parallel to a radial plane of said drive wheel and extending at least partially about a circumference of said drive wheel;mass bodies unattached to one another and positioned loosely adjacent to one another in said channel;said mass bodies, when accelerated, acting on said drive wheel for driving said drive wheel;said drive wheel having at the circumference a gearing having recceses in which said mass bodies are form fittingly received for driving said drive wheel, wherein a spacing between adjacent recesses of said gearing is substantially identical to a spacing between adjacent ones of said mass bodies.