EP3534741A1 - Casque de protection - Google Patents
Casque de protectionInfo
- Publication number
- EP3534741A1 EP3534741A1 EP17793968.3A EP17793968A EP3534741A1 EP 3534741 A1 EP3534741 A1 EP 3534741A1 EP 17793968 A EP17793968 A EP 17793968A EP 3534741 A1 EP3534741 A1 EP 3534741A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- helmet
- inner cap
- cap
- decoupling layer
- fastening
- 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.)
- Withdrawn
Links
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
- A42B3/06—Impact-absorbing shells, e.g. of crash helmets
- A42B3/062—Impact-absorbing shells, e.g. of crash helmets with reinforcing means
- A42B3/063—Impact-absorbing shells, e.g. of crash helmets with reinforcing means using layered structures
- A42B3/064—Impact-absorbing shells, e.g. of crash helmets with reinforcing means using layered structures with relative movement between layers
-
- 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
- A42B3/08—Chin straps or similar retention devices
Definitions
- the present invention relates to a protective helmet comprising at least one inner cap intended to be placed in contact with the head of a wearer, an outer cap and a decoupling layer interposed between the inner cap and the outer cap, the decoupling layer. being able to allow a relative rotational movement of the outer cap with respect to the inner cap according to any axis of rotation during an impact, at least one spherical surface extending to the periphery of the decoupling layer being totally contained in the decoupling layer, the helmet comprising a fastening strap fixed in at least two opposite points of the inner cap without mechanical connection with the outer cap, the fastening strap being intended to ensure the attachment of the helmet to the wearer's head .
- WO 2004/032659 discloses a helmet having an inner cap, and an outer cap adapted to decouple in rotation from the inner cap, during an oblique shock. Such a helmet has improved protection behavior, but still needs to be optimized.
- the invention therefore aims to provide an optimized helmet to improve the protection of the wearer's head both with respect to linear acceleration and rotary acceleration.
- the inner cap has a thickness of between 5 mm and 15 mm;
- the decoupling layer is a continuous layer disposed over the entire outer surface of the inner cap
- the outer cap has a thickness of between 5 mm and 30 mm;
- the helmet comprises at least one connecting element integral with the inner cap and the outer cap and passing through the decoupling layer, the connecting element being substantially longer than the thickness of the decoupling layer and having a module of elasticity of between 150 GPa and 250 GPa, especially greater than 200 GPa, and a yield strength of between 200 MPa and 270 MPa;
- FIG. 1 is a front sectional view (or front) of a first helmet according to the invention
- FIG. 3 is a view of three types of oblique shocks that can suffer the head of a wearer in the event of impact against an impact surface;
- FIG. 5 is a front sectional view of a third helmet according to the invention.
- FIG. 6 represents laws of behavior presented by the inner and outer caps;
- FIG. 7 represents laws of behavior presented by the decoupling layer
- FIG. 8 is a front sectional view of a third helmet according to the invention.
- FIG. 9 is a sectional sectional view of the helmet of Figure 8.
- FIGS. 1-10 A first protective helmet 10 according to the invention is illustrated in FIGS.
- Such a helmet 10 is intended to be used in particular as motorcycle helmet, helmet for race car driver, helmet for e-bike, helmet for cyclist, riding helmet, ski helmet, roller helmet, skipper helmet, work helmet, or military helmet without limitation.
- the protective helmet 10 comprises an inner cap 12 intended to be placed in contact with the head 14 of a carrier, an outer cap 16 and a decoupling layer 20 interposed between the inner cap 12 and the outer cap 16.
- the helmet 10 also optionally includes an outer shell 18.
- the helmet 10 further comprises a fastening device 22 (also called straps) of the helmet 10 to the head 14 of the wearer. It comprises here a visor 24 visible in Figure 2 and optional.
- This visor 24, if it exists, is preferably fixed on the shell 18 or on the outer cap 16.
- This visor is not fixed on the inner cap 12.
- the visor 24 is configured to disengage the helmet 10 in case of impact.
- the inner cap 12 has for example a shape of variable thickness.
- the inner cap 12 has a thickness of between 5 mm and 25 mm. It can be locally thicker or thinner.
- the inner surface 26 is adapted to conform to the shape of the top of the skull of a user.
- the helmet 10 comprises a comfort layer 27.
- This comfort layer 27 has a thickness, for example less than 3 mm.
- the outer surface 28 of the inner cap 12 is inscribed in a sphere.
- the radius of the sphere is preferably between 50 and 130 mm, depending on the size of the helmet. This sphericity ensures a decoupling in rotation around any axis of rotation, as explained below.
- the inner cap 12 has elasto-plastic or viscoelastic characteristics corresponding, for example, to the characteristics of an expanded polystyrene having a density of 20 g / l or 80 g / l.
- the inner cap 12 has a density advantageously between 20 g / l and 80 g / l.
- FIG. 6 illustrates more specifically the characteristics of the material of the inner cap 12. More specifically, FIG. behavior of the stress as a function of the deformation of the constituent material of the inner cap 12.
- the curves of the laws of behavior of the stress as a function of the deformation of the inner cap 12 are thus defined in the corridor framed by a first curve and a second curve visible in FIG. 6.
- the first curve has a slope of 2.5 MPa for deformation less than 0.1 (or 10%), a plateau at 0.25 MPa for a strain of between 0.1 (10%) and 0.9 (90%), and a slope of 20 MPa for deformation greater than 0.9 (90%).
- the second curve has a slope of 10 MPa for a deformation less than 0.1 (or 10%), a plateau at 1 MPa for a strain of between 0.1 (10%) and 0.6 (60%), and a slope of 10 MPa for a deformation higher than 0.6 (60%).
- the inner cap 12 thus has an elastic behavior for a deformation, for example less than 0.1 (or 10%), the Young's modulus then being between 2.5 MPa and 10 MPa.
- the elastic limit of the inner cap 12 is for example between 0.25 MPa and 1 MPa.
- the constitutive law of the inner cap 12 has a plateau for a deformation of between 0.1 (10%) or less and a limit value, the limiting value being between 0.6 (60%) and 0.9 (90%). %) or more. From this limit value, the behavior law has a slope of between 10 MPa and 20 MPa.
- the inner cap 12 is formed for example of a honeycomb structure, expanded polystyrene, expanded polypropylene, polyethylene foam, polyurethane foam, crosslinked polyethylene or non-crosslinked polyethylene.
- the outer cap 16 has a layer which has an inner surface 30 to be brought into contact with the decoupling layer 20, and an outer surface 32 placed in contact with the outer shell 18 if it exists.
- the inner surface 30 is inscribed in a sphere.
- the radius of the sphere is preferably between 60 and 130 mm depending on the size of the helmet 10.
- the outer cap 16 has for example a substantially spherical shape and constant thickness. As a variant, it has a non-spherical shape of variable thickness, but ensures that a surface contained in the decoupling layer 20 is substantially spherical. This sphericity ensures a decoupling in rotation around any axis of rotation, as explained below.
- the thickness of the outer cap 16 is between 5 and 30 mm.
- the outer cap 16 has elasto-plastic or viscoelastic characteristics corresponding for example to the characteristics of an expanded polystyrene of density 20 g / l or 80 g / l.
- the outer cap 16 has a density advantageously between 20 g / l and 80 g / l.
- the constituent materials of the outer cap 16 and the inner cap 12 are the same. Alternatively, they are different.
- FIG. 6 illustrates more specifically the characteristics of the material of the outer cap 16. More specifically, FIG. 6 represents a corridor of examples of laws of behavior of the stress as a function of the deformation of the constituent material of the outer cap 16.
- the curves of the laws of behavior of the stress as a function of the deformation of the outer cap 16 are thus defined in the corridor framed by the first curve and the second curve visible in FIG. 6 and described above.
- the outer cap 16 thus has an elastic behavior for a deformation, for example less than 0.1 (10%), the Young's modulus then being between 2.5 MPa and 10 MPa.
- the elastic limit of the outer cap 16 is for example between 0.25 MPa and 1 MPa.
- the constitutive law of the outer cap 16 has a plateau for a deformation comprised between 0.1 (10%) or less and a limit value, the limiting value being between 0.6 (60%) and 0.9 (90%). %) or more. From this limit value, the behavior law has a slope of between 10 MPa and 20 MPa.
- the outer cap 16 is formed for example of a honeycomb structure, expanded polystyrene, expanded polypropylene, polyethylene foam, polyurethane foam, crosslinked polyethylene or non-crosslinked polyethylene.
- the inner cap 12 and the outer cap 16 are for example made of an identical material. Alternatively, they are made of a different material.
- the inner cap 12 and the outer cap 16 are intended to absorb mainly the normal (or radial) component of the force exerted on the helmet 10 during an impact.
- the inner cap 12, and the outer cap 16 respectively extend to a respective peripheral free edge 34, 36.
- the outer shell 18, if it exists, is attached to the outer cap 16 on the outer surface 32 of said cap 16.
- the outer shell 18 comprises a deformable and / or breakable fitting 38 covering the free edges 34 and 36 of the inner cap 12 and the outer cap 16, at the periphery of the outer shell 18.
- the coupling 38 is intended to break to separate the inner cap 12 of the outer cap 16 in case of shock.
- it is the outer cap 16 or inner 12 which comprises the connector 38, at the periphery of the outer cap 16 or inner 12.
- the outer shell 18 is formed for example of polycarbonate, acrylonitrile butadiene styrene, PVC, resin reinforced with glass fibers, carbon fibers or kevelar.
- the decoupling layer 20 is adapted to allow a rotational movement of the outer cap 16 relative to the inner cap 12 along any axis of rotation, during an impact applied to the outer shell 18 (or to the outer cap 16 in the case where the outer shell 18 is non-existent) due to its deformation under shear.
- FIG. 3 is a sectional view of three types of oblique shocks with a rotary component about the main axes of rotation that can be experienced by the head 14 of the helmet wearer 10.
- the axis noted X which corresponds to the posterior / anterior axis of the head 14
- the axis noted Y which corresponds to the left-right lateral axis of the head 14
- the axis noted Z which corresponds to the vertical axis of the head 14
- Any axis of rotation of the head 14 of the wearer can be expressed as a function of the X, Y and Z axes, the rotation along the Z axis being known as the most dangerous for the head 14 of the wearer.
- the decoupling layer 20 is configured so that at least one spherical surface 39 is completely contained in the decoupling layer 20 substantially at the center of the cutting layer 20.
- This spherical surface 39 extends to the periphery of the decoupling layer 20 being completely contained in the decoupling layer 20.
- the interfaces between the decoupling layer 20 and respectively the inner cap 12 and the outer cap 16 are spherical.
- the decoupling layer 20 is an isotropic or anisotropic continuous layer disposed over the entire outer surface 28 of the inner cap 12.
- the decoupling layer 20 has a thickness greater than 5 mm and advantageously between 5 mm and 15 mm
- the decoupling layer 20 has elasto-plastic or fragile viscoelastic mechanical properties with a low sliding modulus.
- the sliding module of the decoupling layer 20 is for example less than 2 MPa.
- the decoupling layer has a density of between 10 g / l. and 500 g / l.
- FIG. 7 illustrates more precisely the characteristics of the material of the decoupling layer 20. More precisely, FIG. 7 represents a corridor of examples of laws of behavior of the stress as a function of the deformation of the material constituting the decoupling layer. .
- the curves of the laws of behavior of the stress as a function of the deformation of the decoupling layer 20 are thus defined in the corridor framed by a first curve and a second curve visible in FIG. 7.
- the first curve has a slope of 0, 5 MPa for deformation less than 0.1 (or 10%), a plateau at 0.05 MPa for a strain of between 0.1 (10%) and 0.9 (90%), and a slope of 20 MPa for deformation greater than 0.9 (90%).
- the second curve has a slope of 5 MPa for a deformation less than 0.1 (or 10%), a plateau at 0.5 MPa for a strain of between 0.1 (10%) and 0.5 (50%) , and a slope of 10 MPa for deformation greater than 0.5 (50%).
- the decoupling layer 20 thus has an elastic behavior for a deformation, for example less than 0.1 (10%), the Young's modulus then being between 0.5 MPa and 5 MPa.
- the elastic limit of the decoupling layer 20 is for example between 0.05 MPa and 0.5 MPa.
- the constitutive law of the decoupling layer 20 has a plateau for a deformation between 0.1 (10%) or less and a limit value, the limiting value being between 0.5 (50%) and 0.9 ( 90%) or more. From this limit value, the behavior law has a slope of between 10 MPa and 20 MPa.
- the decoupling layer 20 has a resistance modulus of less than 2 MPa.
- the decoupling layer 20 is for example made of expanded polystyrene having a density of less than 20 g / l, of expanded polypropylene, of polyethylene foam, of polyurethane (PORON, PORON XRD or else V10, SAF, D30), of crosslinked polyethylene or uncrosslinked, in an extruded material such as IMPAX materials, or finally in fragile viscoelastic gels, such as crosslinked polyurethane gels, or polyurethane gels and foams, silicone gels, without limitation. Fragile viscoelastic gels are particularly suitable.
- the fastening device 22 comprises a fastening strap 40 comprising two parts 40A and 40B connectable to one another and separable by means of a fastening system 40C actuable by the wearer.
- the fastening strap 40 is intended to ensure the attachment of the helmet 10 to the head 14 of the wearer.
- the fastening strap 40 more precisely each portion 40A, 40B, is thus fixed to the inner cap 12 of the helmet 10 in at least two opposite points 42 of the inner cap 12, without mechanical connection with the outer cap 16, the two points 42 being in particular opposite to the head 14 of the wearer.
- the fastening strap 40 being fixed to the inner cap 12 via the fastening armature 44.
- the strap 40 is thus attached to the armature 44 at the opposite points 42 , or all along the surface 28.
- the armature 44 has for example a thickness of between 0.5 mm and 2.0 mm.
- the fastening armature 44 is fixed on the inner cap 12 by gluing or overmolding. Alternatively, the attachment armature 44 is fixed to the inner cap 12 by point connections.
- the normal component Fn exerted on the outer shell 18 causes a shock, and more specifically a linear acceleration of the head, which is damped and distributed by the cap 16 and inner 12 and to a lesser extent by the crushing of the decoupling layer 20.
- the tangential component Ft causes an acceleration rotation of the helmet 10 by rotating the assembly formed by the outer shell 18 and the outer cap 16 according to any axis of rotation expressed as a function of the X, Y and Z.
- the attachment armature 44 is fixed to the inner surface 26 of the inner cap 12.
- the attachment points 42 of the strap 40A are located symmetrically in front of the ears, behind the ears and / or symmetrically towards the occipital zone.
- the decoupling layer 20 comprises studs 56 extending, in the cavity 54, between the inner cap 12 and the outer cap 16.
- this decoupling layer 20 is made of a low modulus and low resistance material, it may be necessary to maintain the outer cap 16 on the helmet 10 in the event of a severe oblique impact while allowing the decoupling and so that the outer cap 16 does not separate completely from the helmet 10.
- the helmet 10 comprises the inner cap 12 and the outer cap 16 which, as a result of this violent oblique shock, is able to protect the head 14 of a user in the event of a second impact. .
- Each connecting element 20A is a loose or integral bonding connection of the inner cap 12 and the outer cap 16 and passing through the decoupling layer 20.
- Each connecting element 20A allows a maximum relative movement between the inner cap 12 and the outer cap 16 of between 1 mm and 15 mm in all directions of rotational decoupling, a relative rotation of about 2 to 25 °, depending on the geometry helmet.
- Each connecting element 20A has a modulus of elasticity of between 150 GPa and 250 GPa, especially greater than 200 GPa, and a yield strength of between 200 MPa and 270 MPa.
- these branches 58 are fixed directly to the inner cap 12 without passing through a fastening armature 44.
- the decoupling layer 20 is a continuous material, but provided with holes.
Landscapes
- Helmets And Other Head Coverings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1660753A FR3058298B1 (fr) | 2016-11-07 | 2016-11-07 | Casque de protection |
PCT/EP2017/078487 WO2018083345A1 (fr) | 2016-11-07 | 2017-11-07 | Casque de protection |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3534741A1 true EP3534741A1 (fr) | 2019-09-11 |
Family
ID=57583361
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17793968.3A Withdrawn EP3534741A1 (fr) | 2016-11-07 | 2017-11-07 | Casque de protection |
Country Status (6)
Country | Link |
---|---|
US (1) | US11147332B2 (fr) |
EP (1) | EP3534741A1 (fr) |
AU (1) | AU2017352667A1 (fr) |
BR (1) | BR112019008632A2 (fr) |
FR (1) | FR3058298B1 (fr) |
WO (1) | WO2018083345A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB201621272D0 (en) * | 2016-12-14 | 2017-01-25 | Mips Ab | Helmet |
US11337481B2 (en) * | 2018-05-11 | 2022-05-24 | Specialized Bicycle Components, Inc. | Helmet with foam layer having an array of holes |
US11419380B2 (en) * | 2018-08-09 | 2022-08-23 | Bell Sports, Inc. | Helmet with front end fit system elastic connectors |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0116738D0 (en) * | 2001-07-09 | 2001-08-29 | Phillips Helmets Ltd | Protective headgear and protective armour and a method of modifying protective headgear and protective armour |
US20040117896A1 (en) | 2002-10-04 | 2004-06-24 | Madey Steven M. | Load diversion method and apparatus for head protective devices |
US20090260133A1 (en) * | 2008-04-18 | 2009-10-22 | Del Rosario John A | Impact Absorbing Frame and Layered Structure System for Safety Helmets |
CN102406262A (zh) * | 2010-09-09 | 2012-04-11 | O·申普夫 | 保护头盔和用于减小或防止头部损伤的方法 |
US9089180B2 (en) * | 2011-09-08 | 2015-07-28 | Emerson Spalding Phipps | Protective helmet |
US8776272B1 (en) * | 2012-03-08 | 2014-07-15 | Protective Sports Equipment International Inc. | Helmet cover |
US20140259316A1 (en) * | 2013-03-15 | 2014-09-18 | Barry H. Katz | Helmet system |
WO2015089646A1 (fr) * | 2013-12-19 | 2015-06-25 | Bauer Hockey Corp. | Casque pour protection contre les chocs |
US20150223547A1 (en) * | 2014-02-11 | 2015-08-13 | Angel Technologies, Llc | Protective helmet with impact-absorbing layer |
US10004290B2 (en) * | 2014-12-05 | 2018-06-26 | Two Guys And A Hat Inc. | Protective headgear |
-
2016
- 2016-11-07 FR FR1660753A patent/FR3058298B1/fr not_active Expired - Fee Related
-
2017
- 2017-11-07 US US16/348,118 patent/US11147332B2/en active Active
- 2017-11-07 AU AU2017352667A patent/AU2017352667A1/en not_active Withdrawn
- 2017-11-07 EP EP17793968.3A patent/EP3534741A1/fr not_active Withdrawn
- 2017-11-07 BR BR112019008632-3A patent/BR112019008632A2/pt not_active IP Right Cessation
- 2017-11-07 WO PCT/EP2017/078487 patent/WO2018083345A1/fr unknown
Also Published As
Publication number | Publication date |
---|---|
FR3058298B1 (fr) | 2019-01-25 |
FR3058298A1 (fr) | 2018-05-11 |
AU2017352667A1 (en) | 2019-05-23 |
WO2018083345A1 (fr) | 2018-05-11 |
BR112019008632A2 (pt) | 2020-06-02 |
US20190357623A1 (en) | 2019-11-28 |
US11147332B2 (en) | 2021-10-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2018083345A1 (fr) | Casque de protection | |
EP0682885B1 (fr) | Dispositif de fixation occipitale d'un casque | |
EP3790422B1 (fr) | Casque de protection comportant un systeme mecanique de reglage de taille | |
US20040117896A1 (en) | Load diversion method and apparatus for head protective devices | |
US20120096631A1 (en) | Omni-directional angular acceration reduction for protective headgear | |
JP6282491B2 (ja) | 留め機構及びヘルメット | |
EP3435803B1 (fr) | Dispositif de protection interne pour casque et casque ainsi equipe | |
EP3256316B1 (fr) | Matériau composite et dispositifs de protection associés | |
WO2007077368A2 (fr) | Dispositif de protection du rachis cervical d'un individu et collier correspondant | |
TWI617429B (zh) | 具吸震性之複合材料結構 | |
FR2981025A1 (fr) | Arrimage textile de ceinture de securite. | |
EP0108694A1 (fr) | Dispositif d'assujettissement amélioré des casques | |
EP3289906B1 (fr) | Casque de protection avec système de jugulaire | |
EP2803280A1 (fr) | Élément à coque de protection d'une région du corps humain et vêtement qui en est pourvu | |
US10272966B2 (en) | Windscreen safety assembly | |
FR3102648A1 (fr) | Casque comprenant une coque de protection externe amovible | |
FR2873086A1 (fr) | Capot multicouche a peau exterieure frangible et a agressivite reduite en cas de collision avec un pieton | |
FR3109275A1 (fr) | Casque de protection a reglage perfectionne | |
EP2205112B1 (fr) | Casque de protection avec une calotte comprenant des ailettes flexibles | |
US20240148099A1 (en) | Breakaway visor | |
KR101625185B1 (ko) | 목 보호를 위한 헬멧 고정구 | |
JP2010209492A (ja) | ヘルメット及びこれに用いられる保護フィルム | |
WO2017089316A1 (fr) | Vehicule automobile comprenant un organe de protection de la tete du pilote | |
US20200298924A1 (en) | Safety windscreen assembly | |
FR2909266A1 (fr) | Protecteur de choc,notamment pour motocyclistes et equipement vestimentaire,notamment blouson ou pantalon, equipe d'un protecteur de choc |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20190506 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
AX | Request for extension of the european patent |
Extension state: BA ME |
|
DAV | Request for validation of the european patent (deleted) | ||
DAX | Request for extension of the european patent (deleted) | ||
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20220504 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20220915 |