| 摘要 |
A safety device in a motor vehicle comprises a roller retractor (2) mounted at the top of the back (1) of a vehicle seat. The roller retractor (2) has wound on it a sheet-like element or net (3) which is extractable from the roller to engage anchoring means secured in or adjacent the roof of the vehicle. The length of net (3) to be extracted from the roller retractor (2) is different in different positions of the back of the seat. The roller retractor mechanism is associated with a locking mechanism (5) which is actuated in at least one of the alternative positions of the back of the seat to lock the extraction of more than a predetermined length of the sheet-like element from the roller retractor (2). The length is sufficient to enable the sheet to be secured to connecting means provided in the roof of the vehicle.
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