| 摘要 |
The restraint consists of a plate (4) fixed to a part of the vehicle chassis (5) which is not susceptible to deformation, and a projecting rod (2) on the top of the driver's crash helmet (1) which engages with an aperture (3) in the plate and is fixed once the driver is seated. The projection rod is of metal or composition, fastened through a hole in the top of the helmet and fixed by a nut. The plate can be fixed to e.g. a guard bar, either directly or via an intermediate element, and it can have a quick-release fitting. In a variant of the design the helmet projection can be replaced by a metal or composition cable with a hook connected to a ring on top of the helmet.
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