15
As the seat belt is firmly connected to the belt retractor shaft (6),
the seat belt is retracted and tensioned. To esnure that the belt
force exerted on the occupants stays within a defined range, the
belt force is limited. The belt force is limited by the retractor shaft
(6), which is configured as a torsion bar spring. The "Snake"(5) is
moved to the side by the guide (8) in a controlled manner. The
distance which the piston (2) travels is limited by the stopper
which moves up against the braking wedge (4).
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637_104
When the stopper (2) has reached the end of its travel envelope,
the long part of the "Snake" (5) protrudes a defined distance from
the guide tube/pressure chamber (3). At this point, 4 short parts
of the "Snake" come into contact with the gear (7). Due to the
5-piece design of the "Snake", the 4 short parts displace and push
the "Snake" in such a way that the gear and the retractor shaft (6)
are again free. The belt tensioning process is now complete.
"Snake" (5)
Gear (7)
Guide (8)
Braking
wedge (4)
Piston (2)
Piston with
stopper (2)
"Snake" (5)
Guide tube/pres-
sure chamber (3)
Retractor
shaft (6)
Retractor
shaft (6)
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