Helmet

Abstract

A helmet is provided that can be ventilated without any decrease in helmet-shell strength. The helmet comprises a helmet shell 3 and an impact-absorbing member 4 disposed along the inner surface of the helmet shell 3 . The helmet shell 3 has paired right-hand and left-hand cheek-covering portions 9 , and a side hemming member 22 is attached to a lower edge 9 a of the cheek-covering portion 9 . The cheek-covering portion 9 has an upwardly cut-out portion 50 formed on its lower-end side, and the lower edge 9 a of the cheek-covering portion 9 is slanted upward in peak form from both sides toward the center in front-back direction. The side hemming member 22 has a wide portion 52 formed so as to swell upward in peak form for obtaining a wide vertical width in correspondence with the cut-out portion 50 , and the wide portion 52 has an air ejection hole 55.

1 . A helmet comprising:
 a helmet shell; and   an impact-absorbing member disposed along an inner surface of the helmet shell,   the helmet shell having a pair of right-hand and left-hand cheek-covering portions,   the right-hand, left-hand cheek-covering portion being, at its lower edge, fitted with a side hemming member,   the right-hand, left-hand cheek-covering portion having an upwardly cut-out portion formed on its lower-end side, the lower edge of the right-hand, left-hand cheek-covering portion being made in peak form so as to be slanted upward from both sides toward a center thereof in a front-back direction,   the side hemming member having a wide portion formed so as to swell upward in peak form for obtaining a wide vertical width in correspondence with the cut-out portion, the wide portion being formed with an air ejection hole.   
     
     
         2 . The helmet according to  claim 1 ,
 wherein the side hemming member has a side engagement portion of U-section which engages the lower edge of the cheek-covering portion, and a side bend edge portion protruding from the lower end of the side engagement portion,   wherein that part of the side engagement portion which corresponds to the wide portion is curved in peak form so as to be slanted upward from both sides toward the center in the front-back direction along the lower edge of the cheek-covering portion,   and wherein that part of the side bend edge portion which corresponds to the wide portion is made as a wide bend edge part which protrudes downward, while being widened, from the side engagement portion, the wide bend edge part being formed with said air ejection hole.   
     
     
         3 . The helmet according to  claim 1 ,
 wherein the outer surface of the side hemming member is formed with an outside-air guide surface which is gradually inclined horizontally outwardly as it extends backward from the rear opening edge of the air ejection hole, or is gradually inclined horizontally inwardly as it extends forward from the front opening edge of the air ejection hole.   
     
     
         4 . The helmet according to  claim 3 ,
 wherein a plurality of said air ejection holes are spaced apart in the front-back direction in the wide portion of the side hemming member,   wherein said outside-air guide surface is placed between the air ejection holes arranged adjacent each other in the front-back direction, and is gradually inclined horizontally outwardly as it extends backward from the rear opening edge of the front-located air ejection hole toward the front opening edge of the rear-located air ejection hole.   
     
     
         5 . The helmet according to  claim 1 ,
 wherein said helmet shell has a chin-covering portion protruding forward from the lower side of the right-hand, left-hand cheek-covering portion, for covering the chin-to-mouth region of a helmet wearer,   and wherein an air passageway for causing exhaled air to flow backward for its movement toward said air ejection hole is formed inside the chin-covering portion and the cheek-covering portion.   
     
     
         6 . The helmet according to  claim 5 ,
 wherein the impact-absorbing member situated ahead of the mouth of a helmet wearer is formed with a mouth communication hole communicating with the front of said air passageway.   
     
     
         7 . The helmet according to  claim 5 ,
 wherein the lower-end side of the impact-absorbing member corresponding to the cheek-covering portion protrudes downward beyond the lower edge of the cheek-covering portion corresponding to the cut-out portion, and extends up to the inside of the right and left of the wide portion of the side hemming member,   and wherein the lower side of the rear of said air passageway is located on the inside of the right and left of the wide portion of the side hemming member, and communicates with the air ejection hole of the side hemming member.   
     
     
         8 . The helmet according to  claim 5 ,
 wherein said air passageway is formed in between the chin-covering portion as well as the cheek-covering portion and the impact-absorbing member corresponding to them by creating, at the outer surface of the impact-absorbing member corresponding to the chin-covering portion and the cheek-covering portion, a horizontally-inwardly sunken passageway-forming groove in the front-back direction.   
     
     
         9 . The helmet according to  claim 8 ,
 wherein the impact-absorbing member corresponding to the chin-covering portion and the cheek-covering portion is formed with an inside-air communication hole communicating with the air passageway from the inner surface thereof.   
     
     
         10 . The helmet according to  claim 9 ,
 wherein a pair of right-hand and left-hand cheek pads is disposed inside the impact-absorbing member corresponding to the chin-covering portion and the cheek-covering portion,   and wherein each of the cheek pads has a pad communication hole formed therethrough from the inside to the outside so as to communicate with said inside-air communication hole.   
     
     
         11 . The helmet according to  claim 5 ,
 wherein a pair of right-hand and left-hand cheek pads is disposed inside the impact-absorbing member corresponding to said chin-covering portion and said cheek-covering portion, the right-hand, left-hand cheek pad having an insertion locking piece bent upward from the outer-edge side of the lower end of the cheek pad in the horizontal direction,   wherein the insertion locking piece is passed inside the right and left of the side hemming member so as to be inserted in between the chin-covering portion as well as the cheek-covering portion and the impact-absorbing member corresponding to them, thereby holding the cheek pads within the impact-absorbing member,   and wherein an air vent is formed in that part of said insertion locking piece which corresponds to the air ejection hole, and a mesh sheet is additionally provided in the insertion locking piece so as to cover the air vent.   
     
     
         12 . The helmet according to  claim 11 ,
 wherein the front ends of, respectively, the right-hand and left-hand cheek pads are spaced apart in the horizontal direction at the front of the mouth of a helmet wearer,   and wherein the impact-absorbing member situated ahead of the mouth of the helmet wearer is formed with a mouth communication hole communicating with the front of said air passageway, the mouth communication hole being placed between the front ends of, respectively, the right-hand and left-hand cheek pads.   
     
     
         13 . The helmet according to  claim 1 ,
 wherein paired right-hand and left-hand chin bands are fixedly coupled to the inner-surface sides of the right-hand and left-hand cheek-covering portions, respectively, so as to extend downward through the inside of the right and left of the side hemming member,   and wherein the wide portion of the side hemming member is placed in a position corresponding to the chin band.   
     
     
         14 . The helmet according to  claim 5 ,
 wherein a pair of right-hand and left-hand cheek pads is disposed inside the impact-absorbing member corresponding to said chin-covering portion and said cheek-covering portion,   wherein the lower-end side of the impact-absorbing member corresponding to the cheek-covering portion is made concavely above the wide portion of the side hemming member and the lower part of the cheek pad,   and wherein a cavity passageway is formed between the wide portion of the side hemming member and the lower part of the cheek pad under the impact-absorbing member, and the lower side of said air passageway communicates with the cavity passageway.   
     
     
         15 . The helmet according to  claim 14 ,
 wherein the cheek pad has, in its lower part, a pad communication hole formed therethrough from the inside to the outside so as to communicate with the cavity passageway.