| 摘要 |
<p>The helmet (10) has a shock absorbing shell (12) and a fastening strap. The rear part of the fastening strap (14) is threaded through an abutment plate which is slightly concave and bears 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 the occipital bone to prevent the helmet from tilting forwardly in the sagittal plane.</p> |
