| 摘要 |
This invention relates to a protective helmet for a cyclist having a conventional shock-absorbing shell and a fastening strap. The rear part of the fastening strap is threaded through an abutment plate which is slightly concave and destined to bear on the occipital bone of the head of the cyclist. The front part of the fastening strap is attached to the front part of the helmet. The abutment plate is attached to a loop band which hangs from the rear part of the helmet. When the cyclist puts the helmet on and fastens the fastening band, the abutment plate bears on his occipital bone to prevent the helmet from tilting frontwardly in the sagittal plane.
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