• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a protective helmet (1) comprising: • a cap (2) comprising: ○ a main part (2a) made of expanded polypropylene defining a through hole on its top part, o a shock absorbing element filling in the hole passing through, • a shell (3) fixed to the top part of the cap (2) and covering the through-hole, the shock-absorbing element being mechanically bonded with the main part (2a) and chemically with the shell (3), so that the main part (2a), the shock absorbing element and the shell (3) are integral. The invention also relates to a method of manufacturing such a protective helmet.
    公开号:FR3044519A1
    申请号:FR1561863
    申请日:2015-12-04
    公开日:2017-06-09
    发明作者:Antonin Gaudillere
    申请人:Zedel SAS；
    IPC主号:
    专利说明:

    TECHNICAL FIELD OF THE INVENTION The invention relates to a multi-material protective helmet and the method of manufacturing such a helmet. State of the art
    Protective helmets must be both lightweight and compact to ensure user comfort. They must also be adapted to absorb shocks and protect the user. Several types of materials can be used to make helmets that meet these constraints, including expanded polystyrene and expanded polypropylene.
    The helmet marketed under the Météor® brand by the applicant has an expanded polystyrene cap. This material being fragile, the cap is advantageously covered with a protective shell to ensure good shock absorption, but also to avoid scratches. As a result, this helmet is relatively heavy, even if it is compact.
    The helmet marketed under the trademark Sirocco® by the applicant has a one-piece construction made of expanded polypropylene. This protective helmet is one of the lightest on the market, but has the disadvantage of being bulky. In fact, the expanded polypropylene absorbs shocks less well than expanded polystyrene, the cap must therefore have a greater thickness to obtain the same level of shock absorption. However expanded polypropylene is slightly flexible and therefore less fragile than expanded polystyrene, the cap of this helmet does not need to be covered with a protective shell to prevent breaks and scratches.
    The compactness of the helmet and its weight being criteria influencing the choice of the user, there is therefore a need to make a helmet with these characteristics, while ensuring good shock absorption.
    Object of the invention
    An object of the invention is to provide a protective helmet that is lightweight and compact, while properly protecting the user in case of shock. For this purpose, the protective helmet comprises: a cap comprising: an expanded polypropylene main part defining a through hole on its summit part, a shock absorber element filling the through hole, a thermoformed shell attached to the part top of the main part and completely covering the through hole, the shock absorbing element being mechanically bonded with the main part and chemically with the shell, so that the main part, the shock absorber element and the shell are integral.
    According to one aspect of the invention, the shell may advantageously be made of a material resistant to perforation. This may for example be chosen from polycarbonate, acrylonitrile butadiene styrene, polyethylene, fiberglass, carbon fiber, or poly (p-phenyleneterephthalamide) fiber. The shock absorbing element can in turn be made of expanded polystyrene.
    According to one embodiment, the inner wall of the through hole can be bevelled so that the cross section of the through hole is smaller on the outer face of the cap than on the inner face. In this case, the shell may advantageously be larger than the outer section of the through hole, so as to prevent the movement of the shock absorbing element towards the inside of the protective helmet.
    According to an alternative embodiment, the inner wall of the through hole can be chamfered. The invention also relates to the method of manufacturing a protective helmet having the aforementioned characteristics.
    The method comprises the following steps: • providing a main part having a through hole on its top part, • providing a shell completely covering the through hole of the main part, • placing the shell against the through hole so as to cover it completely, Filling the through-hole with a material for forming a shock-absorbing element, so that the material is in contact with the inner wall of the through-hole and with the shell, to form a mechanical connection with the main and chemical part with the shell.
    According to a particular mode of implementation of the method, the step of filling the hole can be performed by injection. An additional step of depositing an adhesive on the inner face of the shell may also be added, so as to stick the shell on the main part and on the shock absorber element.
    BRIEF DESCRIPTION OF THE DRAWINGS Other advantages and features will emerge more clearly from the following description of particular embodiments of the invention given by way of non-limiting example and represented in the accompanying drawings, in which: FIG. schematically a general view of a protective helmet according to a first embodiment, - Figures 2 and 3 show sectional views of the helmet according to two possible alternative embodiments.
    DETAILED DESCRIPTION The skilled person, wishing to achieve a helmet that is both lightweight and compact, could use the helmets Meteor® and Sirocco® marketed by the plaintiff and try to modify their structures.
    To make the Sirocco® helmet more compact, it is sufficient to limit the amount of material used to form the cap. This, however, affects the shock absorption capacity. Also, to remedy this problem, one can think that a shell can be added to the cap. This is however impossible because the expanded polypropylene used to form the cap is chemically inert, which prevents making a chemical connection between the cap and an ancillary part.
    In order for the Meteor® helmet to be lighter, one solution may be to reduce the size of the shell to keep it only on the most shock-prone part, that is to say the top part. The weight gain remains minimal because the volume occupied by the hull is negligible in front of the volume of the cap. This modification does not bring a satisfactory result.
    The proposed solution for making a compact and lightweight helmet is illustrated by way of example in the figures.
    FIG. 1 shows a protective helmet 1 comprising a cap 2 made in two parts: a main part 2a having a hole advantageously crossing on its summit part, and a shock absorbing element 2b, positioned in the hole of the main part 2a, as we will see later. The upper part of the cap 2 is covered with a shell 3 covering the hole formed in the main part 2a.
    The protective helmet 1 also comprises occipital straps 4a, frontal 4b and chinstrap 4c adjustable by means of an adjustment loop 5 that can be opened and closed so that a user can put on and take off the protective helmet 1.
    The protective helmet 1 may optionally comprise a foam padding (not shown), housed inside the cap 2 and directly in contact with the head of the user. The cap 2 may also be provided with ventilation holes (not shown) to improve the comfort of the user.
    The shell 3 covers the top portion of the cap 2. The shell 3 is made of a material that has a very high impact resistance and good durability over time. It is interesting to protect the top part of the helmet with this type of material because it is the part that is most likely to receive impacts and therefore ages faster. However, on the side parts of the helmet, the addition of a hull is of little interest because these areas are very unlikely to be subject to shocks. Placing the shell 3 only on the top part of the helmet can therefore significantly reduce the weight, without compromising the safety of the user.
    The shell 3 is for example made of polycarbonate, acrylonitrile butadiene styrene, polyethylene, fiberglass, carbon fiber, or poly (p-phenyleneterephthalamide) fiber sold under the name Kevlar® or Twaron®. These materials are very strong and offer improved impact resistance compared to expanded polypropylene. The fact of placing the shell 3 only on the upper part of the cap 2 saves about 30% by weight compared to a structurally identical helmet but which would be completely covered by the shell, such as the Meteor helmet.
    In order to guarantee the lightness of the protective helmet 1, the main part 2a of the cap 2 is advantageously made of expanded polypropylene, similarly to the Sirocco® helmet, but using a lesser thickness of material compared to the helmet of the art prior.
    In order to form a light climbing helmet, very resistant and ensuring good energy absorption in case of impact, the inventors have discovered that the shell 3 must be secured to the main part 2a of the cap 2 by means of an intermediate element different from the expanded polypropylene. The intermediate element is formed by the absorber element 2b which fills the hole.
    This absorber element 2b is disposed on the top part of the helmet, inside the hole formed in the expanded polypropylene. The absorber element 2b is formed by overmoulding so as to fill the hole present in the main part 2a of the cap 2 and thus seal the cap. In this way the cap 2 is monobloc and it has different mechanical performance between the top part and the peripheral area also called main part 2a. The thickness of the absorber element 2b is smaller than that of the upper part of the Sirocco® helmet, so that the protective helmet 1 is much more compact than that of the prior art.
    Moreover, the absorber element 2b is made of a material having a density close to that of the expanded polypropylene and much lower than that of the shell 3 so as not to weigh down the helmet 1 in comparison with what was achieved in the prior art for a cap exclusively expanded polypropylene. The absorber element 2b is made of a material that has the property of absorbing the energy during the impact, so as to transmit less effort to the user, and to improve the protection and comfort of the latter.
    It has been observed that the resistance of the protective helmet is improved when a mechanical connection is made between the main part 2a and the absorber element 2b instead of chemical adhesion.
    According to an advantageous embodiment, the hole formed in the main part 2a of the cap 2 and filled by the absorber element 2b is configured to prevent the rotation of the absorber element 2b inside the hole, which would accelerate the aging in the friction zone.
    It is also advantageous to provide that the hole formed in the main part 2a of the cap 2 and filled by the absorber element 2b is configured so as to prevent the translation of the absorber element 2b in a direction perpendicular to the top of the helmet, that is to say in a configuration that would make the absorber element 2b removable from the rest of the cap 2.
    The shape of the hole may have one or more projecting areas so as to prevent the translation and / or rotation of the absorber element relative to the remainder of the cap. An embodiment of this kind is illustrated in FIG. 2. The inner wall of the through hole may be chamfered so that the mechanical connection between the main part 2a and the shock absorber element 2b prevents both the movements of the shock absorber element 2b inwardly and outwardly of the cap 2. In this case, the shell 3 may have a shape and dimensions identical to those of the through hole in order to cover it without bearing on the part main 2a. However, to meet safety and / or aesthetic constraints, the shell 3 may very well occupy a larger surface of the outer portion of the cap 2.
    The inner wall of the through hole may have other shapes, the only constraint being that it prevents the movement of the shock absorbing element. Any form of the male / female type makes it possible to make a mechanical connection between the main part 2a and the shock absorbing element 2c, and is therefore configured to produce a protective helmet 1 according to the invention.
    According to an alternative embodiment illustrated diagrammatically in FIG. 3, the rotation and / or the translation can be prevented by the shape of the hole in cooperation with the absorber element fixed to the shell 3. In this case, the shell 3 overflows beyond of the absorber element 2b, that is to say on the outer portion of the main zone 2a of the cap 2. Concretely, the inner wall of the through hole can be beveled, so as to prevent the movement of the element shock absorber 2b to the outside of the cap 2. The inner wall of the through hole is thus cut so that the hole section is smaller on the outer face of the cap 2 than on the inner face. To avoid the displacement of the shock absorbing element 2b towards the inside of the cap 2, the shell 3 has a section advantageously larger than the section of the hole of the main part 2a, so as to bear on the latter. As will be seen below, it may also be advantageous to chemically bond the absorber element 2b and the shell 3 to prevent any translation of the absorber element 2b towards the inside of the cap 2.
    It has been observed that the use of a shell 3 which is not chemically bonded to the main part of the expanded polystyrene shell 2 allows a better dispersion of the energy during the impacts, by damping in a preferred manner the shocks by means of the absorber element 2b. Against all expectations, this embodiment appears more efficient than a direct bonding of the shell 3 against the rest of the cap 2.
    However, since the shell 3 has a small thickness, for example less than 2 mm, it is necessary to achieve a chemical adhesion between the absorber element 2b and the shell 3. The shell 3 is chemically bonded to the absorber element 2b, and is made integral with the rest of the cap 2 by means of the mechanical connection between the absorber element 2b and the main portion 2a of the cap.
    However, alternatively, it is also possible to adhere the shell 3 to the cap 2 punctually.
    This combination of the shell 3 with the absorber element 2b to form the top part of the helmet is particularly advantageous because it allows for a helmet that has the same impact absorption performance as the helmets of the prior art, while being more compact and lighter. This combination also makes it possible to thin the summit zone of the cap 2.
    To make a protective helmet 1 with the features just mentioned, it is first necessary to provide a main portion 2a having a hole in the upper part, open at least on the outer face of the cap 2. The main part 2a can advantageously be injection molded. The through hole can be made in two different ways, either with a mold having a through hole, or by piercing the main part 2a after it is demolded.
    The shell 3 is itself injection molded or thermoformed, depending on the type of material used. The shape of the shell 3 is advantageously adapted to perfectly fit the outer portion of the cap 2, and in particular completely cover the through hole made in the main portion 2a.
    The shell 3 is then placed against the outer part of the cap 2 according to the final position it must have at the end of the process, that is to say by completely covering the through hole and possibly bearing on the main part 2a of the cap 2.
    According to a first embodiment, the hole is then completely filled with expanded polystyrene in order to form the shock absorbing element 2b. The material is introduced so as to be in contact with the inner wall of the hole to make a mechanical connection with the main part 2a. The amount of material is adapted so that the thickness of the shock absorber element 2b is identical to that of the main part 2a. The cap 2 thus has a uniform thickness, which allows it to be used in a comfortable manner.
    When the absorber element 2b and the shell 3 are brought into contact, a chemical reaction takes place between the shell material 3 and the expanded polystyrene, so that these two parts become chemically bonded.
    The filling of the hole with the expanded polystyrene can be carried out by injection. If the hole is through, it is then preferable to fill it from the inner part of the cap 2 since the shell 3 covers the hole on the outer face of the cap 2.
    According to an alternative implementation mode, the shock absorber element 2b can be formed by injection into a mold and then inserted into the hole. It may be necessary to insert the part forcefully into the hole, especially if the inner wall of the hole is chamfered.
    A layer of adhesive may optionally be applied to the wall of the shell 3 intended to be in contact with the outer face of the cap 2. This improves the chemical bond between the shock absorber element 2b and the shell 3.
    权利要求:
    Claims (9)
    [1" id="c-fr-0001]
    claims
    1. Protective helmet (1) comprising: • a cap (2) comprising: o a main part (2a) of expanded polypropylene defining a through-hole on its top part, o a shock-absorbing element (2b) filling the through-hole , A shell (3) fixed to the top part of the cap (2) and covering the through hole, the shock absorbing element (2b) being mechanically bonded with the main part (2a) and chemically with the shell (3). ), so that the main part (2a), the shock absorber element (2b) and the shell (3) are integral.
    [2" id="c-fr-0002]
    2. Protective helmet (1) according to claim 1, wherein the shell (3) is made of a material resistant to perforation.
    [3" id="c-fr-0003]
    3. Protective helmet (1) according to any one of claims 1 or 2, wherein the shell (3) is made of a material selected from polycarbonate, acrylonitrile butadiene styrene, polyethylene, fiberglass, carbon fiber, or poly (p-phenyleneterephthalamide) fiber.
    [4" id="c-fr-0004]
    4. Protective helmet (1) according to any one of claims 1 to 3, wherein the shock absorbing element (2b) is made of expanded polystyrene.
    [5" id="c-fr-0005]
    5. Protective helmet (1) according to any one of claims 1 to 4, wherein the inner wall of the through hole is bevelled so that the cross section of the through hole is smaller on the outer face of the cap ( 2) only on the inner side, and in which the shell (3) is larger than the outer section of the through hole, so as to prevent movement of the shock absorbing element (2b) towards the inside of the helmet protection (1).
    [6" id="c-fr-0006]
    6. Protective helmet (1) according to any one of claims 1 to 4, wherein the inner wall of the through hole is chamfered.
    [7" id="c-fr-0007]
    7. A method of manufacturing a protective helmet (1), comprising the following steps: • providing a main part (2a) having a through hole on its top part, • providing a shell (3) completely covering the through hole of the main part (2a), • place the shell (3) against the through hole so as to cover it completely, • fill the through hole with a material intended to form a shock absorbing element (2b), so that the material either in contact with the inner wall of the through hole and with the shell (3), to form a mechanical connection with the main part (2b) and chemical with the shell (3).
    [8" id="c-fr-0008]
    8. A method of manufacturing a protective helmet (1) according to claim 7, wherein the step of filling the hole is performed by injection.
    [9" id="c-fr-0009]
    9. A method of manufacturing a protective helmet (1) according to any one of claims 7 or 8, comprising an additional step of depositing a glue on the inner face of the shell (3), so as to stick the shell (3) on the main part (2a) and on the shock absorber element (2b).
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3175728B1|2018-07-11|Multi-material protective helmet
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    FR2689406A1|1993-10-08|Golf club head composed of an internal sub-assembly and an external envelope.
    FR2485341A1|1981-12-31|THERMOPLASTIC INJECTED HULL PROTECTIVE HELMET AND METHOD FOR MANUFACTURING THE SAME
    CH670037A5|1989-05-12|
    EP2974612B1|2017-11-01|Damping helmet
    FR2672810A1|1992-08-21|ALPINE SKI INTENDED TO SLIP ON SNOW AND ICE.
    EP3231489B1|2020-11-11|Snowboard, boot-binding device intended for being provided on such a board, and snowboarding system comprising said board and said binding device
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    FR2975605A1|2012-11-30|SAFETY FASTENING TALONNIER FOR SKI SHOE
    EP2205112B1|2012-03-07|Protection helmet including a cap with flexible flaps
    EP0936044A1|1999-08-18|Method for producing a rigid structural element of an article of sport
    FR2959479A1|2011-11-04|AIRCRAFT FUSELAGE STRUCTURE COMPRISING AN ENERGY ABSORBER DEVICE
    FR2830725A1|2003-04-18|SPORTS SHOE
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    EP3318309B1|2020-03-25|Device for lower end of a sports pole
    BE1007519A3|1995-07-25|Helmet.
    FR2635688A1|1990-03-02|Golf-club head with attached striking face
    EP3100625A1|2016-12-07|Sports helmet
    FR3083673A1|2020-01-17|VISION DEVICE FOR SPORTS HELMET AND HELMET EQUIPPED WITH SUCH DEVICE
    同族专利:
    公开号 | 公开日
    ES2685950T3|2018-10-15|
    CN106880123A|2017-06-23|
    FR3044519B1|2018-01-05|
    PT3175728T|2018-10-22|
    EP3175728A1|2017-06-07|
    EP3175728B1|2018-07-11|
    CN106880123B|2021-10-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE202013102870U1|2013-07-01|2013-07-15|Kin Yong Lung Industrial Co., Ltd.|Shock absorption for a ski helmet|
    CN201557597U|2009-07-09|2010-08-25|统盟实业发展有限公司|Half cover type helmet|
    CA2786243A1|2010-01-06|2011-07-14|Alpha Appalachia Holdings, Inc.|Impact absorbing safety helmet for mining|
    US8347419B1|2011-09-13|2013-01-08|Cleva Robert E|Form-fitting protective headwear|
    JP6286137B2|2013-05-13|2018-02-28|東洋物産工業株式会社|Shock absorbing liner in work helmet|
    CN203897393U|2014-01-26|2014-10-29|坎迪德·珍妮花·洛博|Protective helmet|
    AU2015227020A1|2014-03-07|2016-09-15|Bell Sports, Inc.|Multi-body helmet construction and strap attachment method|US10010127B1|2017-06-29|2018-07-03|Bell Sports, Inc.|Protective helmet with multi-density impact liners and method for same|
    US20190090574A1|2017-09-22|2019-03-28|Bell Sports, Inc.|Interlocking co-molded helmet energy management liner|
    FR3100692B1|2019-09-13|2021-09-24|Roof Int|Protective helmet and method of mounting a cushioning pad for a helmet|
    法律状态:
    2016-11-11| PLFP| Fee payment|Year of fee payment: 2 |
    2017-06-09| PLSC| Publication of the preliminary search report|Effective date: 20170609 |
    2017-10-12| PLFP| Fee payment|Year of fee payment: 3 |
    2018-10-11| PLFP| Fee payment|Year of fee payment: 4 |
    2019-10-15| PLFP| Fee payment|Year of fee payment: 5 |
    2020-10-13| PLFP| Fee payment|Year of fee payment: 6 |
    2021-11-09| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1561863|2015-12-04|
    FR1561863A|FR3044519B1|2015-12-04|2015-12-04|MULTI-MATERIAL PROTECTION HELMET|FR1561863A| FR3044519B1|2015-12-04|2015-12-04|MULTI-MATERIAL PROTECTION HELMET|
    PT16200942T| PT3175728T|2015-12-04|2016-11-28|Multi-material protective helmet|
    EP16200942.7A| EP3175728B1|2015-12-04|2016-11-28|Multi-material protective helmet|
    ES16200942.7T| ES2685950T3|2015-12-04|2016-11-28|Multimaterial protective helmet|
    CN201611102851.2A| CN106880123B|2015-12-04|2016-12-05|Multi-material protective helmet|
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