EP4289304A1 - Helmet and method for manufacturing helmet - Google Patents

Helmet and method for manufacturing helmet Download PDF

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Publication number
EP4289304A1
EP4289304A1 EP21924754.1A EP21924754A EP4289304A1 EP 4289304 A1 EP4289304 A1 EP 4289304A1 EP 21924754 A EP21924754 A EP 21924754A EP 4289304 A1 EP4289304 A1 EP 4289304A1
Authority
EP
European Patent Office
Prior art keywords
members
helmet
main body
head
helmet shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP21924754.1A
Other languages
German (de)
English (en)
French (fr)
Inventor
Akira Sawabe
Yoshiaki Saijo
Masami Kurihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shoei Co Ltd
Original Assignee
Shoei Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shoei Co Ltd filed Critical Shoei Co Ltd
Publication of EP4289304A1 publication Critical patent/EP4289304A1/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/10—Linings
    • A42B3/14—Suspension devices
    • A42B3/147—Anchoring means
    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/10—Linings
    • A42B3/12—Cushioning devices
    • A42B3/125—Cushioning devices with a padded structure, e.g. foam
    • A42B3/127—Cushioning devices with a padded structure, e.g. foam with removable or adjustable pads

Definitions

  • the present disclosure relates to a helmet and a method for manufacturing a helmet.
  • a motorcycle helmet includes an impact absorber at the inner side of a helmet shell.
  • Patent Document 1 describes a liner made of resin foam as an example of an impact absorber.
  • the liner has a hemispherical shape in conformance with the inner surface of the helmet shell and is configured to cover the entire head of a wearer. The liner protects the head of the wearer by absorbing impact applied to the helmet.
  • Patent Literature 1 Japanese Laid-Open Patent Publication No. 2019-85663
  • the lateral dimension of the inner surface of the helmet shell gradually increases from a location covering the top of the head of the wearer toward a location covering the sides of the head and then decreases from the location covering the side of the head toward a fitting opening into which the head of the wearer is fitted.
  • the liner needs to be deformed to be reduced in size in the lateral direction so that the portion of the liner having the maximum dimension in the lateral direction can enter the fitting opening.
  • the shape of the inner surface of the helmet shell will not match the shape of the outer surface of the liner, and the deformation of the liner will form a gap between the inner surface of the helmet shell and the outer surface of the liner.
  • a gap may be formed between the inner surface of the helmet shell and the outer surface of the liner.
  • the thickness of the helmet shell is not constant or the inner surface of the helmet shell is uneven because of steps or inner projections used to attach parts, gaps may be formed between the inner surface of the helmet shell and the outer surface of the liner.
  • the helmet shell or the liner is increased in thickness to ensure that the impact absorbing capability is sufficient even when a gap is formed between the helmet shell and the liner.
  • the helmet will be increased in weight and the helmet shell will be enlarged thereby increasing the air resistance. This will increase the load on the wearer.
  • the direction in which the liner is deformed so that the liner can enter the helmet shell from the fitting opening of the helmet shell is not limited to the lateral direction. In other words, a gap between the inner surface of the helmet shell and the outer surface of the liner such as that described above may be formed in a direction other than the lateral direction.
  • a helmet in one aspect of the present disclosure, includes a helmet shell and an impact absorber arranged at an inner side of the helmet shell.
  • the impact absorber includes: a hemispherical main body including an insertion recess in an outer surface of the main body, the insertion recess defining an insertion space between the outer surface of the main body and an inner surface of the helmet shell, the insertion space being open toward a fitting opening of the helmet shell; and an inserted member that is press-fitted into the insertion space.
  • the inserted member is press-fitted into the insertion space so that the inserted member fills the insertion space, formed by the outer surface of the main body and the inner surface of the helmet shell.
  • contact between the helmet shell and the impact absorber is increased. This improves the impact absorbing capability of the impact absorber.
  • the main body includes the insertion recess at a location covering a side of a head of a wearer.
  • the lateral dimension of the inner surface of the helmet shell is the maximum at the location covering the sides of the head of the wearer.
  • the lateral dimension of the outer surface of the impact absorber also needs to be the maximum at the location covering the sides of the head of the wearer.
  • the impact absorber will have to be deformed to reduce the maximum dimension as described above.
  • contact between the helmet shell and the impact absorber will be decreased at the location covering the sides of the head of the wearer.
  • the inserted member is press-fitted into the insertion space defined at locations corresponding to the sides of the head of the wearer thereby effectively increasing the contact between the impact absorber and the helmet shell. This improves the impact absorbing capability of the impact absorber.
  • the main body and the inserted member are molded products of the same resin foam, and a portion of the main body where the insertion space is defined has an expansion ratio equal to that of the inserted member.
  • the portion of the main body where the insertion space is defined has the expansion ratio equal to that of the inserted member.
  • the inserted member has a thickness of 3 mm or greater and 30 mm or less.
  • the thickness of the inserted member is 3 mm or greater to increase the mechanical strength of the inserted member. This avoids breakage of the inserted member when the inserted member is press-fitted into the insertion space. Further, the thickness of the inserted member is 30 mm or less so that the inserted member can be readily press-fitted into the insertion space.
  • the inserted member is removable from the insertion space.
  • the main body can be readily taken out of the fitting opening by first removing the press-fitted inserted member from the insertion space and then removing the main body.
  • the main body includes: a first member located at a position corresponding to a top of a head; a second member having an annular shape and arranged entirely around the head at a lower side of the first member; two third members located at positions corresponding to right and left sides of the head at a lower side of the second member; two fourth members located at positions corresponding to right and left cheeks of the head at lower sides of the third members; and a fifth member located at a position corresponding to a mouth and a chin of the head and connecting ends of the fourth members, each of the third members is a member defining the insertion space that receives the inserted member between the inner surface of the helmet shell and an outer surface of the third member, and the impact absorber includes a total of nine components.
  • the nine components can be each made of a foamed material having density suitable for the corresponding locations.
  • the first member has a density that is the lowest and the second member has a density that is second to the lowest.
  • the first member absorbs impact directly applied to the second member.
  • the first member further absorbs impact, through the second member, applied to any one or more of the third members, the inserted member, the fourth members, and the fifth member.
  • the second member has a density lower than that of the third members and lower than or equal to that of the inserted member.
  • the third members and the inserted member are harder than the second member to protect the temples from impact. Impact applied to the third members is absorbed by the second member and the first member.
  • the third members have a density higher than or equal to that of the inserted member.
  • the third members have a density lower than or equal to that of the fourth members, and the inserted member has a density lower than that of the fourth members.
  • the fourth members that protect the cheeks are harder than the third members and the inserted members to protect the cheeks from impact. Further, impact applied to the fourth members is dispersed and absorbed by the third members, the inserted members, the second member, and the first member.
  • the fifth member has a density higher than or equal to that of the fourth members, and the density of the fifth member is the highest.
  • the fifth member is the hardest in a liner and protects the mouth and the chin. Impact applied to the fifth member is dispersed and absorbed by the fourth members, the third members, the inserted members, the second member, and the first member.
  • the second member has a vertical width between the first member and the third members that is less than a vertical width of other regions.
  • a vertical width of a portion corresponding to a back of the head is greater than a vertical width between the first member and the third members and a vertical width of a portion corresponding to a front of the head.
  • At least one of the first member, the second member, the third members, the fourth members, the fifth member, and the inserted member includes a blind hole.
  • the blind hole includes: a hole extending through one member selected from a group of components consisting of the first member, the second member, the third members, the fourth members, the fifth member, and the inserted member, the hole including a first end in an outer surface of the one member and a second end in a first abutting surface of the one member, the first abutting surface abutting a second abutting surface of another member selected from the group or components to abut the one member; and a closing portion included in the second abutting surface and closing the second end of the hole.
  • the one member abutting the other member effectively absorbs impact from the other member.
  • the hole is included in the first member and the closing portion is included in the second member.
  • a method for manufacturing a helmet includes a helmet shell and an impact absorber arranged at an inner side of the helmet shell.
  • the method includes attaching the impact absorber to the inner side of the helmet shell.
  • the impact absorber includes a hemispherical main body, the main body including an insertion recess in an outer surface of the main body, the insertion recess defining an insertion space between the outer surface of the main body and an inner surface of the helmet shell, the insertion space being open toward a fitting opening of the helmet shell.
  • FIG. 1 to 9 A helmet according to one embodiment will now be described with reference to Figs. 1 to 9 .
  • the frame of reference for the forward, rearward, leftward, rightward, upward, and downward directions will be based on directions as viewed from a wearer of the helmet.
  • a helmet 1 is a full-face helmet.
  • the helmet 1 includes a helmet shell 10 and a liner 20, which is an example of an impact absorber.
  • the helmet shell 10 forms the outer shell of the helmet 1.
  • the helmet shell 10 is a hemispherical plastic member.
  • the helmet shell 10 is made of a material selected from, for example, a thermoplastic resin such as acrylonitrile-butadiene-styrene copolymers (ABS) or polycarbonate (PC), and a fiber reinforced plastic impregnated with a thermosetting resin.
  • ABS acrylonitrile-butadiene-styrene copolymers
  • PC polycarbonate
  • the helmet shell 10 includes an opening 10a that is open toward the front.
  • the opening 10a provides a field of view for a wearer.
  • the opening 10a may include a shield 11 serving as a light-transmissive plate member.
  • the shield 11 prevents foreign matter, rain, wind, and the like from entering the front of the helmet 1 and improves the visibility of the wearer.
  • the liner 20 is arranged at the inner side of the helmet shell 10.
  • the liner 20 has a hemispherical shape in its entirety in conformance with the inner surface 10c of the helmet shell 10.
  • the liner 20 covers the top of the head of the wearer, the front of the head, the back of the head, and the sides of the head to protect the head of the wearer by absorbing impact applied to the helmet 1.
  • the helmet shell 10 may include an impact absorber that protects the cheeks of the wearer at locations corresponding to the cheeks of the wearer.
  • the liner 20 includes a main body 21 and right and left inserted members 60.
  • the main body 21 includes a first member 30, a second member 40, and right and left third members 50.
  • the main body 21 further includes two fourth members 70 and a fifth member 80.
  • the fourth members 70 are located at the lower sides of the third members 50 in correspondence with the right and left cheeks.
  • the fifth member 80 connects the ends of the fourth members 70 and is located at a position corresponding to the mouth (see Fig. 1 ).
  • the first member 30, the second member 40, the right and left third members 50, and the right and left inserted members 60 are formed by molded products made of resin foam such as styrene foam.
  • the main body 21 includes insertion recesses 22 at the right and left sides corresponding to the sides of the head of the wearer in an outer surface 21a of the main body 21.
  • the insertion recesses 22 are each formed by the second member 40 and the corresponding third member 50.
  • the insertion recess 22 and the inner surface 10c of the helmet shell 10 define an insertion space 10d (refer to Fig. 8 ) when the main body 21 is arranged inside the helmet shell 10.
  • the insertion recess 22 is recessed in the outer surface 21a of the liner 20 and extends continuously from an intermediate portion of the liner 20 in the vertical direction to the lower end of the liner 20.
  • the insertion space 10d is open at the lower end of the liner 20.
  • Each inserted member 60 is press-fitted into the corresponding insertion space 10d.
  • an outer surface 30a of the first member 30 is shaped in conformance with the inner surface 10c of the helmet shell 10. Further, the first member 30 includes an inner surface 30b with a cavity 35 at a location corresponding to the top of the head of the wearer. An interior pad or the like for increasing contact between the head of the wearer and the helmet 1 is arranged in the cavity 35.
  • the first member 30 may include ventilation holes or the like that extends through the first member 30 in the thickness direction, specifically, from the outer surface 30a to the inner surface 30b.
  • the first member 30 includes a bottom surface 31 with a lower edge having a predetermined width.
  • the first member 30 also includes a fitting recess 32 in a region extending along the bottom surface 31 and recessed upward from the bottom surface 31.
  • the second member 40 includes a fitting projection 42 that is inserted into the fitting recess 32.
  • the first member 30 includes engaging projections 33a and 33b that are cylindrical projections projecting downward from the fitting recess 32.
  • the engaging projections 33a and 33b extend over the bottom surface 31 and the fitting recess 32 at the front end of the fitting recess 32.
  • the engaging projections 33a and 33b engage engaging recesses 43a and 43b of the second member 40.
  • the first member 30 includes engaging recesses 34a and 34b that are cylindrical recesses recessed upward from the bottom surface 31.
  • the engaging recesses 34a and 34b extend over the bottom surface 31 and the fitting recess 32 at the rear end of the fitting recess 32.
  • the engaging recesses 34a and 34b engage engaging projections 44a and 44b of the second member 40.
  • the second member 40 includes the engaging recesses 43a and 43b, which are cylindrical recesses recessed downward from the fitting projection 42.
  • the engaging recesses 43a and 43b extend over the upper surface 41 and the fitting projection 42 at the front end of the fitting projection 42.
  • the engaging recesses 43a and 43b engage the engaging projections 33a and 33b of the first member 30.
  • the second member 40 includes the engaging projections 44a and 44b, which are cylindrical projections projecting toward the upper surface 41 from the fitting projection 42.
  • the engaging projections 44a and 44b extend over the upper surface 41 and the fitting projection 42 at a rear portion of the second member 40.
  • the engaging projections 44a and 44b engage the engaging recesses 34a and 34b of the first member 30.
  • Engagement of the engaging projections 33a and 33b with the engaging recesses 43a and 43b and engagement of the engaging recesses 34a and 34b with the engaging projections 44a and 44b results in engagement of the first member 30 with the second member 40 to restrict separation of the first member 30 and the second member 40 that are fitted together.
  • the region of the recess 45 located toward the inner surface 40b in the thickness direction of the second member 40 includes a first step 45a projecting from the inward surface of the recess 45. Further, the recess 45 includes an engagement groove 45b extending in the vertical direction at the middle of the first step 45a in the front-rear direction. The engagement groove 45b engages an engaging projection 55 of the corresponding third member 50.
  • the recess 45 includes a first sloped surface 45c in the outer surface 40a at a region located in a corner rearward from the recess 45. The first sloped surface 45c abuts a second sloped surface 61 of the corresponding inserted member 60.
  • the vertical width W1 of the portion where the recess 45 is located is less than the vertical widths of other regions, for example, the vertical width W2 of the portion corresponding to the front of the head and the vertical width W3 of the portion corresponding to the back of the head.
  • the vertical width W3 of the portion corresponding to the back of the head is greater than the vertical width W1 of the portion where the recess 45 is located and the vertical width W2 of the portion corresponding to the front of the head.
  • the upper side of the recess 45 of the second member 40 is an element required to connect portions at the front and back of the head.
  • the region at the upper side of the recess 45 is narrower than the regions at the front and the back of the head.
  • the region at the upper side of the recess 45 is the narrowest so that impact from the corresponding third member 50 and the inserted member 60 is readily transmitted to the first member 30.
  • the front region 51 has a thickness that is continuous with the second member 40.
  • an inner surface 50a of each third member 50 is shaped so that the inner surface of the front region 51 is continuous with the inner surface of the rear region 52 and so that the inner surface 50a is continuous with the inner surface 40b of the second member 40.
  • an outer surface 51a of the front region 51 is continuous with the outer surface 40a of the second member 40 and shaped in conformance with the inner surface 10c of the helmet shell 10.
  • a second step 54 is formed in a region of the third member 50 at the side where the inner surface 50a of the third member 50 is located in the thickness direction of the third member 50.
  • the second step 54 is recessed in conformance with the corresponding first step 45a.
  • the third member 50 includes the engaging projection 55 on the upper surface of the third member 50 projecting upward from the second step 54. Engagement of the engaging projection 55 with the engagement groove 45b holds the third member 50 in a state fitted into the recess 45.
  • Each inserted member 60 is slightly larger than the corresponding insertion space 10d, which is defined by the inner surface 10c of the helmet shell 10 and the insertion recess 22, and is sized to be press-fittable into the insertion space 10d.
  • the outer surface 60a of the inserted member 60 extends continuously with the outer surface 40a of the second member 40 and the outer surface 51a of the front region 51 and shaped in conformance with the inner surface 10c of the helmet shell 10.
  • the inner surface 60b of the inserted member 60 is shaped in conformance with the outer surface 52a of the rear region 52.
  • the inner surface 60b of the inserted member 60 includes a second sloped surface 61 at the rear end of the inserted member 60.
  • the second sloped surface 61 abuts the corresponding first sloped surface 45c of the second member 40.
  • the second inclined surface 60c is shaped in conformance with the first inclined surface 53 of the corresponding third member 50. That is, the second inclined surface 60c is inclined downward toward the front from the upper end of the inserted member 60.
  • the inserted member 60 has a thickness increasing from the upper end toward the lower end to facilitate press-fitting of the inserted member 60 into the corresponding insertion space 10d.
  • the inserted member 60 has a thickness allowing the insertion space 10d to be filled with the inserted member 60.
  • the thickness T of the inserted member 60 at the upper end is preferably 3 mm or greater and 30 mm or less.
  • the thickness T of 3 mm or greater will increase the mechanical strength of the inserted member 60 and avoid breakage of the inserted member 60 when press-fitted into the insertion space 10d.
  • the thickness T of 30 mm or less will facilitate press-fitting of the inserted member 60 into the insertion space 10d.
  • the inserted member 60 have the same expansion ratio as the resin foam forming each member of the main body 21.
  • the expansion ratio in this case is, for example, a value obtained by dividing the density of a resin foam prior to foaming by the apparent density of the resin foam subsequent to foaming.
  • the operation of the helmet 1 will now be described with reference to Figs. 7 to 9 . Specifically, the procedure for attaching the main body 21, which includes the first member 30, the second member 40, and the right and left third members 50, and the right and left inserted members 60 to the helmet shell 10 will now be described.
  • the main body 21 is attached to the inner side of the helmet shell 10 with the first member 30, the second member 40, and the right and left third members 50 in a combined state.
  • the first member 30, the second member 40, and the right and left third members 50 may also be attached to the inner side of the helmet shell 10 in this order.
  • the liner 20 is attached to the helmet shell 10 through the above procedures. After the liner 20 is attached to the helmet shell 10, impact absorbers may be arranged in the helmet shell 10 at locations corresponding to the cheeks of the wearer to protect the cheeks of the wearer.
  • the liner 20 arranged at the inner side of the helmet shell 10 includes the main body 21 and the right and left inserted members 60.
  • the main body 21 includes the first member 30, the second member 40, and the right and left third members 50.
  • the main body 21 includes the two fourth members 70, located at the lower sides of the third members 50, and the fifth member 80 at a location corresponding to the mouth and the chin and connecting the ends of the fourth members 70.
  • the fourth members 70 are located at positions corresponding to the right and left cheeks.
  • each fourth member 70 is connected to the corresponding third member and the corresponding inserted member 60 overlapping each other in the thickness direction.
  • the fifth member 80 is arranged between the ends of the right and left fourth members 70 to cover the mouth and the chin.
  • the first member 30, the second member 40, the right and left third members 50, the right and left fourth members 70, the fifth member 80, and the right and left inserted members 60 are formed by molded products made of resin foam such as styrene foam.
  • the liner 20 includes a total of nine components, specifically, one first member 30, one second member 40, two third members 50, two inserted members 60, two fourth members 70, and one fifth member 80.
  • the nine components are each made of a foamed material having density suitable for the corresponding location. The members become harder when the foamed material has a higher density.
  • the nine components are each made of a foamed material having an expansion ratio suitable for the corresponding location. The members become harder when the foamed material has a lower expansion ratio.
  • Each fourth member 70 includes an outer surface 70a continuous with the outer surface 60a of the corresponding inserted member 60 and the outer surface 51a of the front region 51 of the third member 50.
  • the fourth member 70 includes an inner surface 70b continuous with the inner surface 50a of the third member 50.
  • the fifth member 80 is located between the ends of the right and left fourth members 70 to cover the mouth and the chin.
  • the upper edge of the fifth member 80 is the middle of the lower edge of the opening 10a.
  • the lower edge of the fifth member 80 forms part of the fitting opening 10b underneath the chin.
  • the fifth member 80 includes an outer surface 80a continuous with the outer surfaces 70a of the fourth members 70.
  • the fifth member 80 includes an inner surface 80b continuous with the inner surfaces 70b of the fourth members 70.
  • the right and left ends of the fifth member 80 include the connection surfaces 81 for the fourth members 70.
  • the fifth member 80 is positioned and attached between the second end surfaces 75 of the right and left fourth members 70.
  • the density of the fifth member 80 is higher than or equal to the density of the fourth members 70, and the fifth member 80 has the highest density (see Fig. 16 ).
  • the fifth member 80 is the hardest in the liner 20 and protects the mouth and the chin. Impact applied to the fifth member 80 is dispersed and absorbed by the fourth members 70, the third members 50, the inserted members 60, the second member 40, and the first member 30.
  • the liner 20 described above includes nine components in total, specifically, one first member 30, one second member 40, two third members 50, two inserted members 60, two fourth members 70, and one fifth member 80.
  • the liner 20 includes the nine components so that the density, or hardness, is changed in accordance with location of the head to provide impact protection tuned in accordance with the characteristics of each part of the head.
  • Fig. 16 shows the densities of the first member 30, the second member 40, the third members 50, the inserted members 60, the fourth member 70, and the fifth member 80 for each size (S, M, L, XL).
  • " 1 " to “8" represent density and smaller values indicate lower density.
  • “1” indicates a density of about 0.01 to 0.0125 (g/cm 3 )
  • “2” indicates a density of about 0.0111 to 0.0143 (g/cm 3 ).
  • “3” indicates a density of about 0.0125 to 0.0167 (g/cm 3 )
  • "4" indicates a density of about 0.0143 to 0.020 (g/cm 3 ).
  • the main body 21 When the helmet is assembled, the main body 21 is first fitted into the helmet shell 10 through the fitting opening 10b. Then the main body 21 is held in contact with the inner surface 10c of the helmet shell 10 and fitted and fixed to the inner surface 10c.
  • the insertion spaces 10d are formed between the insertion recesses 22 of the main body 21 and the inner surface 10c of the helmet shell 10.
  • the insertion spaces 10d are open toward the fitting opening 10b of the helmet shell 10.
  • the inserted members 60 are press-fitted into the insertion spaces 10d formed at the inner side of the helmet shell 10.
  • the inserted members 60 are inserted into the innermost portions of the insertion spaces 10d where the inserted members 60 abut the inward surfaces of the recesses 45 of the second member 40.
  • the first embodiment and the second embodiment may be modified as follows.
  • the blind holes 37 may be formed in the front of the helmet 100, specifically, at the upper side of the opening 10a.
  • the blind holes 37 are arranged by forming the holes 37a, extending in the vertical direction, in the first member 30 at the upper side of the opening 10a, and closing the holes 37a with the upper surface 41 of the second member 40.
  • the blind holes 37 may be located at the upper sides of the third members 50 and the inserted members 60 and/or the upper side of the opening 10a.
  • the blind holes 37 do not need to include the holes 37a formed in the first member 30.
  • the blind holes 37 may be arranged by forming the holes 37a, extending in the vertical direction, in the second member 40 at the upper side of the third member 50 and the inserted member 60, and closing the holes 37a with at least one of the third member 50 and the inserted member 60.
  • the blind holes 37 do not need to be formed by holes extending through one member selected from the first member 30, the second member 40, and the like and a closing portion of another member, closing the holes, selected from the first member 30, the second member 40, and the like.
  • the blind holes 37 may extend from one of the outer surface and the inner surface to an intermediate portion toward the other surface in one member selected from the first member 30, the second member 40, and the like.
  • the blind holes 37 may each include an open end in the outer surface of the member and extend from the outer surface toward the center of the helmet.
  • the blind hole 37 may include an open end in the inner surface of the member and extend inward in the member.
  • the blind holes 37 may be formed after being molded in a subsequent process with a tool or the like or may be formed by a mold when being molded.
  • the vertical width W1 of the portion where the recess 45 is located may be greater than or equal to the vertical width W2 of the portion corresponding to the front of the head and the vertical width W3 of the portion corresponding to the back of the head.
  • the fifth member 80 does not need to have the highest density among the nine components.
  • the density of the fourth members 70 may be higher than the density of the fifth member 80.
  • the density of the third members 50 may be higher than the density of the fourth members 70. Further, the density of the inserted members 60 may be higher than or equal to the density of the fourth members 70.
  • the density of the third members 50 may be lower than the density of the inserted members 60.
  • the first member 30 does not need to have the lowest density.
  • the liner 20 may include more than or less than nine components.
  • the thickness T of the inserted member 60 is not limited if the inserted member 60 can be smoothly press-fitted into the insertion space 10d and has sufficient strength for press-fitting.
  • the thickness T may be determined in accordance with the size, the shape, and the like of the insertion space 10d and the material, the shape, and the like of the inserted member 60.
  • the thickness T of the inserted member 60 may be greater than 30 mm or less than 3 mm.
  • the inserted member 60 may be configured by bonding or overlapping multiple members so that the thicknesses T is 3 mm or greater and 30 mm or less.
  • the main body 21 includes the insertion recesses 22 at locations covering the sides of the head of the wearer. This is not a limitation, and in the first embodiment, the main body 21 may include the insertion recesses 22 at any portion.
  • the main body 21 may include the insertion recess 22 at a location covering the back of the head of the wearer. Further, the main body 21 may include the insertion recesses 22 at locations covering the sides of the head of the wearer and the location covering the back of the head of the wearer.
  • the main body 21 is formed by the first member 30, the second member 40, and the third members 50.
  • the main body 21 may be formed by, for example, a single member.
  • the first member 30 and the second member 40 may be a single member.
  • any one of the first member 30, the second member 40, and the third member 50 may be formed by separate members.
  • one inserted member 60 is press-fitted into one insertion space 10d.
  • multiple inserted members 60 may be press-fitted into one insertion space 10d.
  • the inserted members 60 do not need to be press-fitted into the innermost portions of the insertion spaces 10d if the outer surfaces 60a of the inserted members 60 contact the inner surface 10c of the helmet shell 10, and the inner surfaces 60b of the inserted members 60 contact the insertion recesses 22 of the main body 21. That is, if the main body 21 contacts the helmet shell 10 through the inserted members 60, the upper surface or the front and rear side surfaces of the inserted member 60 may be spaced apart from the insertion recess 22.
  • the second member 40 may be divided into four pieces in total.
  • the second member 40 may include a portion corresponding to the front of the head, a portion corresponding to the back of the head, and portions connecting the two portions and corresponding to the sides of the head.
  • the helmets 1 and 100 do not need to be full-face helmets.
  • the helmets 1 and 100 may be flip-up helmets with a chin portion that can be raised, open face helmets, helmets with a removable chin portion, or convertible helmets with a chin portion that is pivoted and fixed to the back of the helmet.

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  • Helmets And Other Head Coverings (AREA)
EP21924754.1A 2021-02-05 2021-09-28 Helmet and method for manufacturing helmet Pending EP4289304A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021017071 2021-02-05
PCT/JP2021/035640 WO2022168366A1 (ja) 2021-02-05 2021-09-28 ヘルメットおよびヘルメットの製造方法

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JPS6269811A (ja) * 1985-09-24 1987-03-31 ヤマハ発動機株式会社 ヘルメツトの内張り構造
JP2000080514A (ja) * 1998-08-31 2000-03-21 Honda Access Corp ヘルメット
JP3765377B2 (ja) * 2000-04-04 2006-04-12 本田技研工業株式会社 ヘルメット
JP5232505B2 (ja) * 2008-03-06 2013-07-10 株式会社アライヘルメット ネックパッドの取付け構造
WO2018170495A1 (en) * 2017-03-17 2018-09-20 VICIS, Inc. Removable communications module pocket
JP2019085663A (ja) 2017-11-02 2019-06-06 株式会社アライヘルメット ヘルメット

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JPWO2022168366A1 (zh) 2022-08-11

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