Patent ID: 11903438
Assignee: JIANGYIN DAFEIMA AUTOMOBILE TECHNOLOGY CO., LTD.
Field: Other consumer goods (Other fields)
Classification: CPC A | IPC A

Claim 4:
5. The helmet according to claim 4, wherein a second through hole is further formed in the side of the straight edge of the D-shaped linkage guide annular piece, a second rotating shaft is arranged in the second through hole, one end of the second rotating shaft is in sliding fit with one side of the second through hole, and the other end of the second rotating shaft extends out of one side of the D-shaped linkage guide annular piece; and the other end of the second rotating shaft is provided with a guide roller matched with the tooth-shaped arc-shaped limiting guide groove, the second through hole is a hourglass-shaped long hole formed along a radial direction of the strip-shaped arc-shaped surface of the face mask mount, a spring used for pressing the second rotating shaft is arranged in the hourglass-shaped long hole, and the spring is used for enabling the guide roller to be always press-fitted with the tooth-shaped arc-shaped limiting guide groove.