EP3583863B1 - Fahrradhelm mit drehstossdämpfung - Google Patents

Fahrradhelm mit drehstossdämpfung Download PDF

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Publication number
EP3583863B1
EP3583863B1 EP19179838.8A EP19179838A EP3583863B1 EP 3583863 B1 EP3583863 B1 EP 3583863B1 EP 19179838 A EP19179838 A EP 19179838A EP 3583863 B1 EP3583863 B1 EP 3583863B1
Authority
EP
European Patent Office
Prior art keywords
liner
facing surface
helmet
inner liner
outer liner
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.)
Active
Application number
EP19179838.8A
Other languages
English (en)
French (fr)
Other versions
EP3583863A3 (de
EP3583863A2 (de
Inventor
Paul A KELE
David T DEBUS
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.)
Bell Sports Inc
Original Assignee
Bell Sports Inc
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
Priority claimed from US16/420,652 external-priority patent/US10843607B2/en
Application filed by Bell Sports Inc filed Critical Bell Sports Inc
Publication of EP3583863A2 publication Critical patent/EP3583863A2/de
Publication of EP3583863A3 publication Critical patent/EP3583863A3/de
Application granted granted Critical
Publication of EP3583863B1 publication Critical patent/EP3583863B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • A42B3/06—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
    • A42B3/06—Impact-absorbing shells, e.g. of crash helmets
    • A42B3/066—Impact-absorbing shells, e.g. of crash helmets specially adapted for cycling helmets, e.g. for soft shelled helmets
    • 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

  • Protective headgear and helmets have been used in a wide variety of applications and across a number of industries including sports, athletics, construction, mining, military defense, and others, to protect against damage to a user's head and brain.
  • Contact injury to a user can be prevented or reduced by helmets that restrict hard objects or sharp objects from directly contacting the user's head.
  • Non-contact injuries, such as brain injuries caused by linear or rotational accelerations of a user's head can also be prevented or reduced by helmets that absorb, distribute, or otherwise manage energy of an impact. This may be accomplished using multiple layers of energy management material.
  • Some conventional helmets employ structures or objects that bridge energy management liners that must break, deform, and/or strain an elastic material for the liners to rotate against each other.
  • Such a method of energy absorption has advantages and disadvantages; while the energy is absorbed by the failure or deformation of the projections, the liners may tend to rotate out of one another, reducing the helmet stability.
  • one or more liners may be completely removed from the user's head, drastically reducing the effectiveness of the helmet in protecting against subsequent impacts that occur in that incident.
  • US2017290388-A1 discloses a helmet comprising and outer liner and an inner liner slidably coupled to an interior surface of the outer liner is disclosed.
  • the outer liner comprises an interior surface and the inner liner comprises an exterior surface.
  • the inner liner is composed of an elastically deformable material.
  • a majority of the interior surface of the outer liner and a majority of the exterior surface of the inner liner are both substantially parallel to a pseudo-spherical surface having a coronal cross section that is circular with a first radius and a sagittal cross section that is circular with a second radius different from the first radius.
  • the inner liner is elastically deformable along the interior surface of the outer liner in response to rotation of the outer liner relative to the inner liner caused by an impact to the helmet.
  • An aspect of the disclosure relates to a helmet comprising an outer liner formed of a first foamed energy management material and comprising an inward-facing surface, an inner liner formed of a second foamed energy management material and positioned at least partially inside the outer liner, the inner liner comprising an outward-facing surface facing the inward-facing surface of the outer liner, at least one chin strap anchored to the outer liner and passing through an opening in the inner liner, a plurality of return springs each comprising an elastomeric material, each return spring having a first end coupled to the inward-facing surface of the outer liner, a second end distal to the first end and coupled to the outward-facing surface of the inner liner, and a body connecting the first end and the second end, the plurality of return springs biasing the inner liner to a first position with respect to the outer liner, and at least one leash coupling, each leash coupling comprising an upper end coupled to the outer liner, a lower end distal to the upper
  • At least one glide pad having an adhesive surface affixed to one of the inward-facing surface of the outer liner and the outward-facing surface of the inner liner, and a glide surface opposite the adhesive surface, the glide surface having a coefficient of friction lower than the coefficient of friction of the one of the inward-facing surface of the outer liner and the outward-facing surface of the inner liner.
  • At least one of the inward-facing surface of the outer liner and the outward-facing surface of the inner liner may comprise an annealed surface.
  • the first foamed energy management material and the second foamed energy management material may each comprise one of expanded polystyrene and expanded polypropylene.
  • An aspect of the disclosure relates to a helmet comprising an outer liner comprising an inward-facing surface, an inner liner positioned at least partially inside the outer liner, the inner liner comprising an outward-facing surface facing the inward-facing surface of the outer liner, a plurality of return springs comprising an elastomeric material, each return spring having a first end coupled to the inward-facing surface of the outer liner, a second end distal to the first end and coupled to the outward-facing surface of the inner liner, and a body connecting the first end and the second end, the plurality of return springs biasing the inner liner to a first position with respect to the outer liner, and at least one chin strap anchored to the outer liner and passing through an opening in the inner liner, wherein the inner liner is slidably coupled to the inward-facing surface of the outer liner through the plurality of return springs and slidably movable relative to the outer liner between the first position and a second position where the inner line
  • the outer liner may be formed of a first foamed energy management material and the inner liner is formed of a second foamed energy management material. Both the inward-facing surface of the outer liner and the outward-facing surface of the inner liner may be substantially parallel to a portion of a sphere. For each return spring of the plurality of return springs, at least one of the first end and the second end may sit in a recess in one of the inward-facing surface of the outer liner and the outward-facing surface of the inner liner, the recess having a depth at least equal to a thickness of the return spring.
  • one of the first end and the second end may be coupled to one of the inward-facing surface of the outer liner and the outward-facing surface of the inner liner by a fastener passing through the return spring and into the one of the inward-facing surface of the outer liner and the outward-facing surface of the inner liner.
  • Each fastener may be locked inside a different receiver, each receiver being embedded in one of the outer liner and the inner liner.
  • one of the first end and the second end may be in-molded into one of the inner liner and the outer liner.
  • An outer shell disposed on an outward-facing surface of the outer liner opposite the inward-facing surface of the outer liner, the outer shell comprising a shaped aperture.
  • a branding element comprising a first portion passing through the shaped aperture of the outer shell, and a second portion disposed between the outer shell and the outward-facing surface of the outer liner.
  • At least one leash coupling each leash coupling comprising an upper end coupled to the outer liner, a lower end distal to the upper end and coupled to the inner liner, and a tether that is flexible, connects the upper end and the lower end, and passes through the inward-facing surface of the outer liner and the outward-facing surface of the inner liner, wherein, for each of the at least one leash coupling, a majority of the tether is located in a cavity formed in at least one of the outer liner and inner liner.
  • the tether may be between 10mm and 15mm long.
  • the upper end may comprise an upper anchor coupled to an upper snap receptacle in-molded into the outer liner
  • the lower end may comprise a lower anchor coupled to a lower snap receptacle in-molded into the inner liner.
  • the tether of each leash coupling may be composed of nylon. At least one of the upper end and the lower end of each leash coupling may be in-molded into at least one of the outer liner and the inner liner.
  • Particular embodiments may comprise one or more of the following.
  • noun, term, or phrase is intended to be further characterized, specified, or narrowed in some way, then such noun, term, or phrase will expressly include additional adjectives, descriptive terms, or other modifiers in accordance with the normal precepts of English grammar. Absent the use of such adjectives, descriptive terms, or modifiers, it is the intent that such nouns, terms, or phrases be given their plain, and ordinary English meaning to those skilled in the applicable arts as set forth above.
  • Protective headgear and helmets have been used in a wide variety of applications and across a number of industries including sports, athletics, construction, mining, military defense, and others, to reduce the risk of damage to a user's head and brain.
  • Contact injury to a user can be prevented or reduced by helmets that restrict hard objects or sharp objects from directly contacting the user's head.
  • Non-contact injuries, such as brain injuries caused by linear or rotational accelerations of a user's head can also be prevented or reduced by helmets that absorb, distribute, or otherwise manage energy of an impact. This may be accomplished using multiple layers of energy management material.
  • Some conventional helmets employ structures or objects that bridge energy management liners that must break, deform, and/or strain an elastic material for the liners to rotate against each other.
  • Such a method of energy absorption has advantages and disadvantages; while the energy is absorbed by the failure or deformation of the projections, the liners may tend to rotate out of one another, reducing the helmet stability.
  • one or more liners may be completely removed from the user's head, drastically reducing the effectiveness of the helmet in protecting against subsequent impacts that occur in that incident.
  • a cycling helmet with rotational impact attenuation Contemplated herein is a cycling helmet with rotational impact attenuation.
  • Various embodiments of this helmet comprise an inner liner positioned at least partially inside of an outer liner and able to rotate with respect to the outer liner along their interfacing surfaces.
  • the liners are coupled to each other through a plurality of elastomeric return springs that attenuate the rotation.
  • the liners may be further coupled to each other through one or more chin straps that are affixed to the outer liner and pass through the inner liner.
  • the liners may also be coupled to each other through one or more leash couplings that impose an upper limit to the motion of the liners relative to each other.
  • Such a configuration is advantageous over conventional helmets, as it allows for the attenuation of rotational energy due to a helmet impact while reducing the risk of the complete separation of the two liners.
  • a branding element may be coupled to a helmet such that a first portion of the branding element extends through the outer shell of a helmet while a second portion is trapped between the outer shell and the outer liner, providing greater mechanical stability without drastically modifying or complicating the manufacturing process.
  • FIGs. 1A and 1B are perspective views of a non-limiting example of a helmet providing stable rotational energy attenuation, according to various embodiments.
  • FIG. 1A is an assembled view
  • FIG. 1B is an exploded view.
  • the helmet 100 comprises an outer liner 102, and inner liner 104, and at least one chin strap 106.
  • the following discussion will be done in the context of a helmet 100 having two liners (outer 102 and inner 104).
  • this context is exemplary only, and that the structures and methods contemplated herein may be adapted for helmets having more than two energy management liners.
  • the inner liner 104 is positioned at least partially inside the outer liner 102. As shown, the inner liner 104 comprises an outward-facing surface 114, and the outer liner 102 comprises an outward-facing surface 112. An inward-facing surface 300 of the outer liner 102 will be discussed in the context of FIG. 3 , below. In the context of the present description and the claims that follow, "outward-facing” means facing away from the head of the wearer, while “inward-facing” means facing towards the head of the wearer, while the helmet is in use.
  • the outer liner 102 and inner liner 104 comprise energy management material, to provide protection against impacts.
  • the outer liner 102 is formed of a first foamed energy management material 108
  • the inner liner 104 is formed of a second foamed energy management material 110.
  • the first 108 and second 110 foamed energy management materials may be the same material, while in others they are different.
  • the foamed energy management material may comprise any foamed energy management material known in the art of protective helmets, such as but not limited to expanded polystyrene (EPS), expanded polyurethane (EPU), expanded polyolefin (EPO), expanded polypropylene (EPP), or other suitable material.
  • EPS expanded polystyrene
  • EPU expanded polyurethane
  • EPO expanded polyolefin
  • EPP expanded polypropylene
  • the helmet 100 further comprises at least one chin strap 106.
  • a chin strap refers to a flexible or semi-flexible strap that, in some way, secures the helmet to the wearers head, as is known in the art.
  • the chin strap(s) 106 is anchored to the outer liner 102, and passes through an opening 116 in the inner liner 104 such that it enters the interior space of the helmet 100 where the wearers head is located, allowing it to be secured around the wearers head comfortably.
  • the lengths of the chin straps 106 have been exaggerated, to better illustrate how they pass through openings 116 in the inner liner 104.
  • a chin strap 106 to the outer liner 102 means to couple the chin strap 106 to the outer liner 102 in such as way that it cannot be pulled inward (or the helmet 100 lifted off the wearers head) without a drastic mechanical failure of either the helmet 100 or the strap 106.
  • an end of the chin strap 106 may be in-molded within the outer liner 102, as is known in the art.
  • the strap 106 may be coupled to another object before in-molding, to increase it's surface area and create a stronger coupling with the outer liner 102.
  • the strap 106 may be secured outside of the outer liner 102, such that it cannot be pulled back through (e.g. attached to a wide, flat structure sitting flush with the outer surface of the outer liner 102, etc.).
  • Other methods known in the art for affixing a strap to a liner formed of foamed energy management material may be used.
  • the strap(s) 106 also pass through an opening 116 in the inner liner 104.
  • the strap 106 is not affixed to the inner liner 104 as it is to the outer liner 102, thus allowing for slight movement of the liners with respect to each other while reducing the risk of complete separation in the event of an impact.
  • Anchoring the chinstraps 106 to the outer liner 102 while passing them through the inner liner 104 secures the two liners together without restricting their small relative movements in relation to each other.
  • coupling the chin straps 106 to the helmet 100 in this manner further provides a back-up safety feature.
  • the chin strap 106 which is clipped around the wearer's chin, is still connected to the outer liner 102 and extends through one or more openings in the one or more other liner(s). In this way, the cycling helmet 100 will be more likely to remain in place on the user's head rather than splitting into separate liners.
  • FIG. 2 is a top view of the non-limiting example of a helmet 100 shown in FIGs. 1A and 1B .
  • the helmet 100 may comprise one or more leash couplings 200 that join the outer liner 102 and inner liner 104 with a tether that provides an upper limit to the potential motion of the liners with respect to each other.
  • the leash coupling 200 will be discussed in greater detail with respect to FIGs. 7A and 7B , below.
  • FIG. 3 is a bottom view of the non-limiting example of an outer liner 102 shown in FIGs. 1A and 1B .
  • the outer liner 102 has an inward-facing surface 300 on which a plurality of return springs 302 are coupled.
  • the inward-facing surface 300 of the outer liner 102 may also comprise one or more glide pads 312. Glide pads will be discussed in greater detail with respect to FIG. 4B , below.
  • the outer liner 102 and the inner liner 104 are coupled to each other through the plurality of return springs 302, which serve to attenuate rotational energy from an impact by deforming as the liners rotate with respect to each other.
  • the return springs 302 comprise an elastomeric material 310, able to be elastically deformed while biased toward its original shape. Examples include, but are not limited to, rubber, silicone, thermoplastic elastomers, and the like.
  • the degree of elasticity and the range of motion provided by each return spring 302 may be modified by geometry as well as composition, as is known in the art.
  • each return spring 302 comprises a first end 304, a second end 306 distal to the first end 304, and a body 308 connecting the first end 304 to the second end 306.
  • the first end 304 is coupled to the inward-facing surface 300 of the outer liner 102
  • the second end 306 is coupled to the outward-facing surface 206 of the inner liner 104, according to various embodiments.
  • the manner in which the return springs 302 are coupled to the liners will be discussed further with respect to FIG. 4A , below.
  • the return springs 302 permit the outer liner 102 to rotate with respect to the inner liner 104, but pulls them both back to the centered, neutral position, referred to as the first position.
  • the return springs 302 may be made with a variety of sizes, shapes, and materials, giving them different ranges of motion and attenuation ability. When the liners rotate with respect to each other, the return springs 302 bias them back to the first position, as will be discussed with respect to FIGs. 6A and 6B , below.
  • the helmet 100 may comprise four return springs 302, as shown in FIG. 3 .
  • fewer return springs 302 may be used, while in still others, more springs may be used.
  • Increasing the number of return springs 302 may provide more stability between the inner 104 and outer 102 liners, but may also increase the resistance against rotating the liners with respect to each other, potentially allowing more rotational energy to be transferred to the wearer in an impact.
  • FIG. 4A is a close-up cross-sectional view of a non-limiting example of a return spring 302 coupled to an outer liner 102, taken along line B-B of FIG. 3 .
  • return springs 302 may be seated within recesses in one of the liners.
  • return springs 302 may be seated in a recess 400 in the outer liner 102.
  • the recesses 400 may be on the inner liner 104, while in still other embodiments, both the inner liner 104 and the outer liner 102 may have recesses 400 that align when the liners are coupled together.
  • the recess 400 may have a depth 402 that is at least equal to the thickness 404 of the return spring 302 seated within it, thereby restricting the spring from overly inhibiting the relative rotation of the liners and transmitting impact energy to the wearer.
  • each recess 400 may have a depth 402 less than the thickness 404 of the return spring 302.
  • recesses 400 may be advantageous, as they may facilitate the use of elongated return springs 302 that are substantially tangential to the interfacing surfaces of the liners (e.g. the outward-facing surface 114 of the inner liner 104 and the inward-facing surface 300 of the outer liner 102).
  • these interfacing surfaces may be substantially parallel to a portion of a sphere 408, or pseudo-sphere.
  • the return springs 302 in such embodiments may be substantially tangential to said sphere or pseudo-sphere.
  • a return spring 302 is substantially tangential to a surface (e.g. liner surface, sphere, pseudo-sphere, etc.) when the angle formed between the body 308 of the return spring 302 (i.e. the direction of the body 308, on average, while the spring 302 is coupled to both liners) and the plane tangential to the surface at the point closest to the body 308 is no greater than 15 degrees.
  • a surface e.g. liner surface, sphere, pseudo-sphere, etc.
  • recesses 400 and positioning the return springs 302 to be substantially tangential to the interfacing liner surfaces may be advantageous as it allows for the springs 302 to resist relative liner rotation in a greater number of directions without interfering with the rotation in a way that may mitigate some of the energy attenuation and injuring the wearer.
  • the first end 304 of a return spring 302 is coupled to the inward-facing surface 300 of the outer liner 102 and the second end 306 of the return spring 302 is coupled to the outward-facing surface 114 of the inner liner 104 when the helmet is fully assembled.
  • one of the ends of the return spring 302 may be in-molded into the foamed energy management material of a liner.
  • the in-molded end may be shaped in a way to improve the grasp of the in-molding (e.g. increased surface area of a surface roughly parallel with the liner surface, etc.).
  • one or both ends of the return spring 302 may be coupled to its respective liner through a fastener 406 that pins the end to the surface of the liner.
  • the fastener 406 may be a pin that pierces the return spring end, while in other embodiments the return spring end may have an opening sized to receive part of the fastener, but not large enough to allow the fastener 406 to pass all the way through.
  • the fasteners 406 may be barbed to better grip the material of the liner, or may feature a catch shaped to interface with a receiver, as will be discussed with respect to FIG. 5 .
  • fasteners 406 may be barbed to better grip the material of the liner, or may feature a catch shaped to interface with a receiver, as will be discussed with respect to FIG. 5 .
  • fasteners 406 operated by a linear motion are advantageous as they allow for the outer liner 102 and inner liner 104 to be coupled to each other through the return springs 302 by coupling the springs to one of the liners, inserting said linearly-operated fasteners 406 in the free ends of the springs 302 such that they point away from the liner the spring is already attached to.
  • the other liner is then lined up and pressed toward the other liner, until the fasteners 406 of the free ends have penetrated the second liner and the two liners are coupled together through the return springs 302.
  • linearly operated fasteners 302 are not limited to pins, but may also include adhesives, expanding nails, and the like.
  • FIG. 4B is a close-up cross-sectional view of a non-limiting example of a glide pad 312 coupled to an outer liner 102, taken along line C-C of FIG. 3 .
  • the helmet 100 may include one or more glide pads 312 placed as thin sheets of material having a glide surface 412 and an adhesive surface 410 opposite the glide surface 412 and affixed to one of the interfacing liner surfaces.
  • the glide surface 412 has a coefficient of friction lower than the coefficient of friction of the interfacing liner surfaces.
  • the glide surface 412 may comprise Teflon.
  • glide pads 312 may be die-cut and then attached to sections of one or both interfacing surfaces where friction is most likely to occur.
  • FIG. 4B shows a cross-section of a glide pad 312 attached to an outer liner 102.
  • the glide pads 312 may serve to facilitate liner rotation as well as reduce squeaking during movement. They may also allow the liners to move easier in relation to each other by reducing the friction between the interfacing surfaces.
  • the glide pads 312 may create a small gap between the inner 104 and outer 102 liners in all locations where there is not a glide pad 312. This may significantly reduce the surface area over which friction is generated, and therefore allow for easier rotation as well.
  • the glide pads 312 may be formed as thicker portions that may be in-molded into the liner.
  • the interfacing surfaces may be substantially parallel to a portion of a sphere 408, or a pseudo-sphere, or other curved surface.
  • substantially parallel means the angle between the normal of a point of one surface and the normal of the second surface at the point where the first normal intersects is no greater than 20 degrees. Shaping the liners such that the interface along a spherical or pseudo spherical surface (or portions of such a surface) may facilitate the relative rotation of the liners and improve the effectiveness of the helmet.
  • interfacing surfaces may be substantially parallel to a sphere 408 or a pseudo-sphere, they are not limited to being solid surfaces, but may include voids.
  • Helmets 100 typically have vents to improve the comfort of the wearer; said vents may create voids in the interfacing surfaces without inhibiting the rotation upon impact.
  • FIG. 5 is a top view of a non-limiting example of an inner liner 104.
  • outward-facing surface 114 of the inner liner 104 may comprise one or more prepared surfaces 502, according to various embodiments.
  • a prepared surface 502 is a surface on either of the liners that has been modified to reduce friction and facilitate relative rotation. Unlike glide pads 312, prepared surfaces 502 do not employ the use of adhesive, but instead are either directly incorporated into the liner or allowed to freely move.
  • a prepared surface 502 may comprise a low-friction coating, which may be applied as a liquid and may remain a liquid or may solidify into a smooth surface.
  • the prepared surface 502 may be a layer of thermoplastic such as polycarbonate that has been in-molded into an interfacing surface of one or more liners.
  • said thermoplastic may be coated with a lubricant.
  • a prepared surface 502 may be formed by annealing a portion of an interfacing surface, meaning it is heated to near the melting point until the that portion of the surface relaxes into a smoother form.
  • a liner may comprise a plurality of receivers 500.
  • Some embodiments making use of fasteners 406 to couple the return springs 302 to one or more of the liners may also employ receivers 500, or premade receptacles configured to receive a fastener 406 but not to release it (i.e. the fastener is locked inside the receiver).
  • receivers 500 may be advantageous, as they may be in-molded to provide a strong coupling to the liner while also allowing a linear operation of the fastener 406, and may further facilitate the proper alignment of the two liners during assembly.
  • FIGs. 6A and 6B are side views of the helmet 100 in a first position 600 and a second position 602, respectively.
  • the first position 600 is a neutral position, where the strain on all return springs 302 is at a minimum. This is the configuration the helmet 100 is biased towards when no other forces are operating on the liners.
  • the second position 602 is a position where the inner liner 104 and the outer liner 102 are rotated with respect to each other away from the first position 600. Upon entering a second position 602, the bias of the return springs 302 will drive the liners back towards the first position 600.
  • elastomeric return springs to couple the outer and inner liners together is advantageous in attenuating rotational energy of an impact, they may become damaged or destroyed by forces experienced during an impact. The failure of the springs may result in the liners separating from each other during the impact, a time when they are needed the most. Accordingly, in some embodiments, the liners may be coupled to each other in a manner that allows their relative motion (and thus, impact attenuation), but limits that motion to a set range, reducing the risk of a complete separation of the two liners during or as a result of an impact event.
  • the liners may be coupled to each other through one or more chin straps 106 that are affixed to the outer liner 102 and pass through an opening 116 in the inner liner 104.
  • the motion of a chin strap 106 through the inner liner 104 may be constrained to a particular range, such that the strap(s) may move through the inner liner 104 freely, to a point.
  • the strap 106 may comprise a stopper that is unable to pass through the opening 116 in the inner liner 104, limiting the relative motion of the liners.
  • FIGs. 7A and 7B show cross-sectional views of a non-limiting example of a leash coupling 200 along the line A-A of FIG. 2 . Specifically, FIG. 7A is an exploded view, and FIG. 7B is an assembled view.
  • the leash coupling 200 comprises an upper end 700, a lower end 702 distal to the upper end 700, and a tether 704 that connects the upper 700 and lower 702 ends.
  • the upper end 700 is coupled to the outer liner 102 and the lower end 702 is coupled to the inner liner 104.
  • the tether 704 passes through both of the outward-facing surface 114 of the inner liner 104 and the inward-facing surface 300 of the outer liner 102. In some embodiments, one or both of these surfaces may be formed with an aperture through which the tether 704 passes. In other embodiments, the tether 704 may be pierced through one or both of these surfaces during assembly of the helmet 100.
  • the length of the tether 704 may be chosen such that the relative motion is constrained to a desired range.
  • the length of the tether 704 may range between 10mm and 15mm.
  • the tether 704 may be between 8mm and 17mm long.
  • a tether 704 of a leash coupling may be more than 15mm.
  • the length of the tether 704 may be chosen such that the relative displacement between the liners is constrained to be within 10mm to 15mm, since the length of the tether 704 that provides such a limitation may depend on how and where it is coupled to the liners, and possibly the thickness of the liners, at least near the point of attachment. It should be noted that in some embodiments making use of chin straps 106 passing through the inner liner 104, the relative displacement or movement may also be constrained to be within 10mm-15mm.
  • the tether 704, or at least a majority of the tether 704, may be located in a cavity 706 in one or both of the liners.
  • the cavity 706 allows for excess slack in the tether 704 to be contained without interfering with the slipping movement of one liner with respect to another.
  • the cavity 706 may be formed in one or both of the liners.
  • the cavity 706 may span both liners, being formed in both the outward-facing surface 114 of the inner liner 104 and the inward-facing surface 300 of the outer liner 102.
  • the cavity 706 may be formed during the molding of the liners, while in other embodiments it may be formed after the creation of the liners.
  • the upper end 700 is coupled to the outer liner 102 and the lower end 702 is coupled to the inner liner 104 in such as way that the coupling will be able to withstand forces that may otherwise compromise return springs, helping to maintain the protection provided by two liners throughout the impact event.
  • the leash coupling 200 may be attached to structures that are fixedly coupled to the liners.
  • the upper end 700 of the leash coupling 200 may comprise an upper anchor 708, and the lower end 702 may comprise a lower anchor 712.
  • an upper anchor and/or a lower anchor refers to a structure that may be coupled to a liner, either directly (e.g. in-molded, adhered, bonded, barbed and pierced, etc.) or by coupling with another structure that is already fixed coupled to the liner.
  • the tether 704 passes through an upper snap receptacle 710 and a lower snap receptacle 714, both of which are fixedly attached to their respective liners (e.g. in-molded, bonded, adhered, etc.).
  • the anchors "snap" into these receptacles, affixing the ends of the leash to the liners and limiting the relative motion.
  • the anchors may couple with structures, such as these receptacles, only when the relative motion of the liners has reached it limit.
  • the upper anchor 708 and lower anchor 712 may simply be larger than an aperture in the respective receptacles, such that the tether 704 may pass through, but not the anchors.
  • the anchors will be in contact with (coupled to), but not passing through, the receptacles, causing the tether 704 to halt any further relative displacement.
  • one or both anchors may be integral with the tether 704, while in other embodiments, one or both anchors may be coupled to the tether 704 after manufacture.
  • the tether 704 is flexible, and may be composed of any material that is both strong and able to bend and allow the liners to move freely, within their constrained range of relative motion or displacement. Exemplary materials include, but are not limited to, nylon and other polymers, metal, natural fibers, and the like.
  • the tether 704 may be a single strand, or may be composed of multiple strands (e.g. braided cable, twisted cable, etc.).
  • a helmet 100 may have one or more leash couplings 200 connecting the outer liner 102 with the inner liner 104.
  • a helmet 100 may comprise 1, 2, 3, 4, 5, or more leash couplings 200, according to various embodiments.
  • a helmet 100 may make use of the chin strap 106 passing through the inner liner 104 while affixed to the outer liner 102, as previously discussed, in addition to making use of one or more leash couplings 200.
  • a helmet may make use of the chin straps 106 alone, or the leash couplings 200 alone.
  • either or both methods of constraining the range of relative motion between liners may be used in helmets that do not make use of elastomeric return springs.
  • FIG. 8 is a side view of a helmet 100 comprising a branding element 802 and an outer shell 800.
  • FIG. 9 is a cross-sectional view of the branding element 802, outer shell 800, and outer liner 102 of the helmet 100 of FIG. 8 , taken along the line D-D of FIG. 8 .
  • a branding element 802 is a premade object that has a symbol, lettering, and/or logo that is part of the branding of a helmet, and further comprises connective structure coupling the different parts of the symbol/lettering/ and/or logo into a single piece.
  • the outer shell 800 may be any thin shell that may be attached to the outward-facing surface 112 of the outer liner 102 through in-molding. As shown in FIG 9 , the outer shell has an inward-facing surface 902 and an outward-facing surface 904.
  • the outer shell 800 further comprises a shaped aperture 900 configured to receive a first portion 906 of the branding element 802.
  • the first portion 906 of the branding element 802 comprises the actual branding (e.g. symbols, letters, logos, etc.) that is meant to be visible on the assembled helmet 100.
  • the second portion 908 of the branding element 802 is the remainder, including a surface from which the first portion extends outward. In some embodiments, the second portion 908 may be roughly planar, while in other embodiments it may be curved to match the shape of the portion of the outer liner on which it will rest.
  • the shaped aperture 900 may be created in the outer shell 800 as part of the formation of the outer shell 800 (e.g. formed in a mold, etc.). In other embodiments, the shaped aperture 900 may be cut in the outer shell 800 after it has been formed. In one embodiment, the shaped aperture 900 is cut into the outer shell 800 using a laser cutter. Those skilled in the art will recognize other methods for creating the shaped aperture 900 in the outer shell 800.
  • an adhesive 910 may be applied to the face of the second portion 908 of the branding element 802 from which the first portion 906 extends.
  • the adhesive 910 may be pressure activated.
  • the branding element 802 is inserted through the back of the preformed outer shell 800, the first portion 906 passing through the shaped aperture 900. Pressing the branding element 802 against the outer shell causes the adhesive to bond the second portion 908 to the inward-facing surface 904 of the outer shell 800 proximate the branding element 802, while the first portion 906 of the branding element extends outward from the outward-facing surface 904 of the outer shell 800.
  • the outer liner 102 is formed inside of the outer shell 800, in-molding it and thermally bonding it to the outer shell 800 and second portion 908, and possibly thermally bonding the outer shell 800 to the second portion 908 as well.
  • the second portion 908 is trapped between the outer liner 102 and the outer shell 800.
  • the branding element 802 may be thermally bonded to the outer shell 800 before formation of the outer liner 102.
  • a rubber insert containing a negative of the first portion 906 may be placed inside the first portion 906. This rubber insert helps to protect the branding during the molding process.
  • the rubber insert exerts reverse pressure to the expansion of the foam during molding, thus helping the inner portions of the branding to seat correctly and the pressure sensitive adhesive to bond correctly.
  • this method of attaching a branding element 802 to a helmet 100 may be adapted for use in the manufacture of helmets that to not make use of a foamed outer liner.
  • the second portion 908 may be trapped between an outer shell and another hard shell such as polycarbonate, or carbon fiber, or the like.
  • FIG. 10 is a process flow of a method 1000 for assembling a helmet 100 comprising an inner liner 104 and an outer liner 102, according to various embodiments.
  • the method 1000 includes providing the outer liner 102 of the helmet 100, the outer liner 102 having an inward-facing surface 300.
  • the method 1000 further includes coupling a plurality of return springs 302 to the outer liner 102 by affixing a first end 304 of each return spring 302 to the outer liner 102.
  • Each return spring 302 comprises an elastomeric material 310 and further comprises a second end 306 distal to the first end 304 and having a different one of a plurality of fasteners 406, according to various embodiments.
  • the method 1000 comprises coupling at least one chin strap 106 to the outer liner 102, and providing the inner liner 104 of the helmet 100.
  • the inner liner 104 has an outward-facing surface 114.
  • the method 1000 includes positioning the inner liner 104 at least partially inside the outer liner 102, such that the inward-facing surface 300 of the outer liner 102 is facing the outward-facing surface 114 of the inner liner 104.
  • the method 1000 includes threading the at least one chin strap 106 through an opening 116 in the inner liner 104.
  • the method 1000 includes coupling the inner liner 104 to the outer liner 102 by pressing the inner liner 104 into the outer liner 102 until the plurality of fasteners 406 are passing through the outward-facing surface 114 of the inner liner 104, thereby coupling the outward-facing surface 114 to the inward-facing surface 300 through the plurality of return springs 302.

Landscapes

  • Helmets And Other Head Coverings (AREA)

Claims (15)

  1. Helm (100), umfassend:
    eine äußere Auskleidung (102), die eine nach innen weisende Oberfläche (300) umfasst;
    eine innere Auskleidung (104), die zumindest teilweise innerhalb der äußeren Auskleidung positioniert ist, wobei die innere Auskleidung eine nach außen weisende Oberfläche (114) umfasst, die der nach innen weisenden Oberfläche der äußeren Auskleidung zugewandt ist;
    mindestens einen Kinnriemen; dadurch gekennzeichnet, dass der Helm ferner umfasst:
    mehrere Rückstellfedern (302), die ein elastomeres Material umfassen, wobei jede Rückstellfeder ein erstes Ende (304), das mit der nach innen weisenden Oberfläche der äußeren Auskleidung gekoppelt ist, ein zweites Ende (306), das von dem ersten Ende distal ist und mit der nach außen weisenden Oberfläche der inneren Auskleidung gekoppelt ist, und einen Körper (308) aufweist, der das erste Ende und das zweite Ende verbindet, wobei die mehreren Rückstellfedern die innere Auskleidung in eine erste Position in Bezug auf die äußere Auskleidung vorspannen; und
    wobei:
    der mindestens eine Kinnriemen (106) an der äußeren Auskleidung verankert ist und durch eine Öffnung in der inneren Auskleidung verläuft;
    die innere Auskleidung über die mehreren Rückstellfedern gleitend mit der nach innen weisenden Oberfläche der äußeren Auskleidung gekoppelt ist und relativ zu der äußeren Auskleidung zwischen der ersten Position (600) und einer zweiten Position (602), in der die innere Auskleidung und die äußere Auskleidung in Bezug zueinander weg von der ersten Position gedreht werden, gleitend bewegbar ist; und
    der Körper jeder Rückstellfeder der mehreren Rückstellfedern im Wesentlichen tangential zu der nach innen weisenden Oberfläche der äußeren Auskleidung und/oder der nach außen weisenden Oberfläche der inneren Auskleidung ist.
  2. Helm nach Anspruch 1, wobei die äußere Auskleidung (102) aus einem ersten geschäumten Energiemanagementmaterial (108) und die innere Auskleidung aus einem zweiten geschäumten Energiemanagementmaterial (110) gebildet ist.
  3. Helm nach einem der vorhergehenden Ansprüche, wobei sowohl die nach innen weisende Oberfläche der äußeren Auskleidung als auch die nach außen weisende Oberfläche der inneren Auskleidung im Wesentlichen parallel zu einem Abschnitt einer Kugel (408) sind.
  4. Helm nach einem der vorhergehenden Ansprüche, ferner umfassend:
    mindestens eine Riemenkupplung (200), wobei jede Riemenkupplung ein oberes Ende (700), das mit der äußeren Auskleidung gekoppelt ist, ein unteres Ende (702), das distal zu dem oberen Ende liegt und mit der inneren Auskleidung gekoppelt ist, und ein Halteband (704) aufweist, das flexibel ist, das obere Ende und das untere Ende verbindet und durch die nach innen weisende Oberfläche der äußeren Auskleidung und die nach außen weisende Oberfläche der inneren Auskleidung verläuft;
    wobei für jede der mindestens einen Riemenkupplung ein Großteil des Haltebands in einem Hohlraum angeordnet ist, der in der äußeren Auskleidung und/oder der inneren Auskleidung ausgebildet ist.
  5. Helm nach Anspruch 4, wobei einer oder beide der folgenden Punkte zutreffen:
    a) wobei für jede der mindestens einen Riemenkupplung das obere Ende einen oberen Anker umfasst, der mit einer oberen Schnappaufnahme gekoppelt ist, die in die äußere Auskleidung eingeformt ist, und das untere Ende einen unteren Anker umfasst, der mit einer unteren Schnappaufnahme gekoppelt ist, die in die innere Auskleidung eingeformt ist, und
    b) wobei das obere Ende und/oder das untere Ende jeder Riemenkupplung in die äußere Auskleidung und/oder die innere Auskleidung eingeformt ist.
  6. Helm nach Anspruch 4 oder 5, wobei für jede der mindestens einen Riemenkupplung das Halteband zwischen 10 mm und 15 mm lang ist.
  7. Helm nach Anspruch 4 bis 6, wobei jede Riemenkupplung aus Nylon besteht.
  8. Helm nach einem der vorhergehenden Ansprüche, ferner umfassend mindestens ein Gleitpolster (302) mit einer Klebefläche (410), die entweder an der nach innen weisenden Oberfläche der äußeren Auskleidung oder der nach außen weisenden Oberfläche der inneren Auskleidung befestigt ist, und einer Gleitfläche (412) gegenüber der Klebefläche, wobei die Gleitfläche einen Reibungskoeffizienten hat, der niedriger ist als der Reibungskoeffizient der nach innen weisenden Oberfläche der äußeren Auskleidung oder der nach außen weisenden Oberfläche der inneren Auskleidung.
  9. Helm nach einem der vorhergehenden Ansprüche, wobei die nach innen weisende Oberfläche der äußeren Auskleidung und/oder die nach außen weisende Oberfläche der inneren Auskleidung eine geglühte Oberfläche aufweist.
  10. Helm nach einem der vorhergehenden Ansprüche, wobei das erste geschäumte Energiemanagementmaterial und das zweite geschäumte Energiemanagementmaterial jeweils expandiertes Polystyrol oder expandiertes Polypropylen umfassen.
  11. Helm nach einem der vorhergehenden Ansprüche, wobei für jede Rückstellfeder der mehreren Rückstellfedern das erste Ende und/oder das zweite Ende in einer Ausnehmung in der nach innen weisenden Oberfläche der äußeren Auskleidung oder der nach außen weisenden Oberfläche der inneren Auskleidung sitzt, wobei die Ausnehmung eine Tiefe aufweist, die mindestens gleich der Dicke der Rückstellfeder ist.
  12. Helm nach Anspruch 11, wobei bei mindestens einer der mehreren Rückstellfedern das erste Ende oder das zweite Ende mit der nach innen weisenden Oberfläche der äußeren Auskleidung oder der nach außen weisenden Oberfläche der inneren Auskleidung durch ein Befestigungselement (406) gekoppelt ist, das durch die Rückstellfeder und in die nach innen weisende Oberfläche der äußeren Auskleidung oder die nach außen weisende Oberfläche der inneren Auskleidung verläuft.
  13. Helm nach Anspruch 11, wobei jedes Befestigungselement in einer anderen Aufnahme (500) verriegelt ist, wobei jede Aufnahme entweder in der äußeren Auskleidung oder in der inneren Auskleidung eingebettet ist.
  14. Helm nach einem der vorhergehenden Ansprüche, wobei bei mindestens einer der mehreren Rückstellfedern das erste oder das zweite Ende in die innere Auskleidung oder die äußere Auskleidung eingeformt ist.
  15. Helm nach einem der vorhergehenden Ansprüche, ferner umfassend:
    eine äußere Schale, die auf einer nach außen weisenden Oberfläche der äußeren Auskleidung gegenüber der nach innen weisenden Oberfläche der äußeren Auskleidung angeordnet ist, wobei die äußere Schale eine geformte Öffnung (900) umfasst; und
    ein Markenelement (802), das einen ersten Abschnitt umfasst, der durch die geformte Öffnung der äußeren Schale hindurchgeht, und einen zweiten Abschnitt, der zwischen der äußeren Schale und der nach außen weisenden Oberfläche der äußeren Auskleidung angeordnet ist.
EP19179838.8A 2018-06-18 2019-06-12 Fahrradhelm mit drehstossdämpfung Active EP3583863B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201862686425P 2018-06-18 2018-06-18
US201962833935P 2019-04-15 2019-04-15
US16/420,652 US10843607B2 (en) 2018-05-28 2019-05-23 Headrest and vehicle seat

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EP3583863A2 EP3583863A2 (de) 2019-12-25
EP3583863A3 EP3583863A3 (de) 2020-02-26
EP3583863B1 true EP3583863B1 (de) 2021-08-25

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB202002143D0 (en) * 2020-02-17 2020-04-01 Mips Ab Connector
WO2022229874A1 (en) * 2021-04-29 2022-11-03 George Tfe Scp Cellular energy-absorbing structure fastening device
EP4305990A1 (de) 2022-07-11 2024-01-17 SQlab GmbH Fahrradhelm

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3575848D1 (de) * 1985-10-11 1990-03-15 Akta Barnsaekerhet Ab Schutzhelm fuer freizeitgebrauch.
SE501104C2 (sv) * 1992-04-28 1994-11-14 Rex Handels & Ind Ab Anordning vid hjälm samt förfarande för dess uppbyggnad
ITMI20012070A1 (it) * 2001-10-05 2003-04-05 New Max Srl Metodo per la produzione di un casco di protezione e casco prodotto con tale metodo
US20040250340A1 (en) * 2003-02-05 2004-12-16 Dennis Piper Protective headguard
US8955169B2 (en) * 2011-02-09 2015-02-17 6D Helmets, Llc Helmet omnidirectional energy management systems
US20130232668A1 (en) * 2012-03-06 2013-09-12 Loubert S. Suddaby Helmet with multiple protective zones
US20140013492A1 (en) * 2012-07-11 2014-01-16 Apex Biomedical Company Llc Protective helmet for mitigation of linear and rotational acceleration
AU2014360109B2 (en) * 2013-12-06 2019-09-12 Bell Sports, Inc. Flexible multi-layer helmet and method for making the same
US10271603B2 (en) * 2016-04-12 2019-04-30 Bell Sports, Inc. Protective helmet with multiple pseudo-spherical energy management liners

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EP3583863A2 (de) 2019-12-25

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