| 摘要 |
A full-face motorcycle helmet can include a faceport opening that includes an upper edge, a lower edge, and an A-pillar extending between the upper edge of the faceport and the lower edge of the faceport. The chinbar can include a recess that begins immediately adjacent the A-pillar and includes a chinbar height Hcl within the recess that is greater than or equal to 60 millimeters (mm) and a chin bar height Hc2 outside and immediately adjacent the recess that is greater than or equal to 70 mm. The recess can include a height Hr that is greater than or equal to 5 mm for a distance in a range of 15-60 mm. The recess can further include a stair-step between the bottom of the recess and the top of the recess comprising a length that is less than or equal to 35 mm. |
