Ventilated helmet

Abstract

Title: Ventilated Helmet The invention relates to a head protection helmet comprising a shell (1) and a ventilation adjustment system (3). The shell comprises at least one series of ventilation openings (4) arranged in a first direction (5). The ventilation adjustment system comprises, for each series of ventilation openings (4), a shutter (8). The shutter is movable between at least one first position and a second position (10), different from the first position, the two positions being taken relative to the series of ventilation openings. The area of ​​the series of ventilation openings closed in the first position is larger than that closed in the second position. The shutter is movable by sliding on the outer surface in a second direction oblique to the first direction. Figure for the abstract: Fig. 1.

Description

Title of the invention: Ventilated helmet Technical field

[0001] The present invention relates to the field of helmets for protecting the head of a human being. It finds a particularly advantageous application in the field of helmet design with a view to optimizing, in particular, user comfort. STATE OF THE ART

[0002] There are several technical solutions implementing helmets having specific configurations designed to increase user comfort while providing a helmet ensuring sufficient protection of the user's head as well as ease of handling of the helmet.

[0003] In this context, we can present the technical solution of document WO2007 / 041656 A1 which relates to a helmet provided with openings which can be opened and closed by a single mechanism, thus allowing either ventilation of the user's head in case of heat, or protection of the user's head in case of rain, for example. The openings in question are aligned in a defined direction from the back to the front of the user (or vice versa).

[0004] However, this type of ventilation has drawbacks, in particular the fact that it does not allow for easy handling of the helmet, thus providing sufficient comfort for the user.

[0005] An object of the present invention is therefore to propose a helmet making it possible to overcome at least part of the drawbacks cited.

[0006] Other objects, features, and advantages of the present invention will become apparent from the following description and accompanying drawings. It is understood that other advantages may be incorporated. SUMMARY

[0007] To achieve this objective, according to one embodiment, a helmet is provided comprising a shell delimiting an interior volume for protecting the head of a user and a ventilation adjustment system, in which the shell comprises at least one series of ventilation openings following one another in a first direction, an internal surface in contact with the interior volume and an external surface opposite the internal surface, in which the at least one series of ventilation openings passes through the shell from the internal surface to the external surface, wherein the ventilation adjustment system comprises, for each series of ventilation openings, a shutter, and wherein the shutter is movable between at least a first position relative to the associated series of ventilation openings and a second position, different from the first position, relative to the associated series of ventilation openings, an obstructed surface of the associated series of ventilation openings in the first position being greater than an obstructed surface of the associated series of ventilation openings in the second position, the helmet being characterized in that the shutter is movable by sliding on the external surface in a second oblique direction relative to the first direction.

[0008] Thus, the fact that the shutter is movable by sliding on the external surface in a second oblique direction relative to the first direction implies ease of handling of the helmet because the movement of the shutter allowing the openings to be opened or closed is achieved by gripping the shutter at the extent of its surface, thus creating numerous gripping possibilities whose position is easy for the user to access. In addition, the oblique movement (relative to the first direction) to be carried out to open or close the openings consists of an easy movement for the user because it is physiological (due to the position of the user's arms relative to the openings). Furthermore, due to the progressive and controllable sliding movement of the shutter on the shell, the user can easily assess whether the openings allow the desired air flow. BRIEF DESCRIPTION OF THE FIGURES

[0009] The aims, objects, as well as the characteristics and advantages of the invention will emerge more clearly from the detailed description of an embodiment thereof which is illustrated by the following accompanying drawings in which:

[0010] [Fig.l] [Fig.l] represents the helmet according to the invention in a perspective view so as to illustrate the third articulation.

[0011] [Fig.2] [Fig.2] represents the helmet according to the invention in a perspective view so as to illustrate the second articulation.

[0012] [Fig.3] [Fig.3] represents the helmet according to the invention in the first position according to a perspective view to illustrate the second articulation.

[0013] [Fig.4] [Fig.4] represents the helmet according to the invention in a perspective view so as to illustrate the first articulation.

[0014] [Fig.5] [Fig.5] represents the helmet according to the invention in the first position according to a perspective view so as to illustrate the second joint according to a particular embodiment in which the second joint comprises a slot and in which the extension is visible through the areas.

[0015] [Fig.6] [Fig.6] represents the insulated band of the helmet.

[0016] [Fig.7A] [Fig.7A] represents the helmet according to the invention in the first position according to a perspective view so as to illustrate the second articulation according to a particular embodiment in which the second articulation comprises a slot and in which the extension is not visible through the zones.

[0017] [Fig.7B] [Fig.7B] represents a section of the helmet according to the section plane AA (which is represented in [Fig.7A]).

[0018] The drawings are given as examples and are not limiting of the invention. They constitute schematic representations of principle intended to facilitate the understanding of the invention and are not necessarily on the scale of practical applications. DETAILED DESCRIPTION

[0019] Before beginning a detailed review of embodiments of the invention, optional features which may possibly be used in combination or alternatively are set out below.

[0020] According to one example, the series of ventilation openings 4 is completely obstructed in the first position 9 and / or the series of ventilation openings 4 is completely open in the second position 10.

[0021] Thus, the shutter 8 makes it possible to completely cover the series of ventilation openings 4, to leave the series of ventilation openings completely open to allow access for outside air or to partially cover the series of ventilation openings 4 so as to fix the desired quantity of air that can enter through the openings.

[0022] According to one example, the shutter 8 comprises a strip 12.

[0023] The strip may be flexible and applied to the external surface by being deformed into flexion. Thus, the flexibility of the strip 12 allows the shutter 8 to perfectly match the shape of the hull 1.

[0024] According to one example, the strip 12 has an elongated shape, a length dimension of the strip 12 being directed in the first direction 5, in the first position 9.

[0025] Thus, given the shape of the strip 12, it has the capacity to cover the series of ventilation openings 4 whose openings follow one another in the first direction 5.

[0026] According to one example, the adjustment system 3 comprises, for each shutter 8, a first articulation 13 configured to articulate a first end 14 of the shutter 8 on the shell 1 and a second articulation 15 configured to articulate a second end 16 of the shutter 8 on the shell 1.

[0027] Thus, due to this configuration, the adjustment system 3 allows the strip 12 to be able to move on the shell 1 while being linked to the shell 1 in order to be able to cover the openings as desired.

[0028] According to one example, the first articulation 13 is a pivot comprising an axis of rotation, the axis of rotation preferably being directed according to a normal to the shell 1 at the level of the first articulation 13.

[0029] Thus, thanks to this configuration, the strip 12 can move on the shell 1 by a rotational movement. This rotational movement associated with the translational movements permitted thanks to the second articulation 15 and the third articulation 18 allows the entire strip 12 to perform a pivot movement whose center of rotation is the first articulation 13 and this although the strip 12 is fixed to the shell 1 at the level of the first articulation 13 and the second articulation 15.

[0030] According to one example, the shutter 8 comprises an arm 17 connected to the strip 12 and on which the first articulation 13 is located.

[0031] Thus, the arm 17 makes it possible to configure the stress exerted on the first articulation 13 so that the pivot movement centered at the level of the first articulation 13 does not weaken the area where the first articulation 13 is located.

[0032] According to one example, the second articulation 15 is a slide, preferably rectilinear.

[0033] This configuration allows an overall rotational movement of the band 12 around the first articulation 13.

[0034] According to one example, the adjustment system 3 comprises, for each shutter flap 8, a third articulation 18 configured to articulate on the shell 1 an intermediate portion 19 of the shutter flap 8 located between the first end 14 of the shutter flap 8 and the second end 16 of the shutter flap 8.

[0035] Thus, given the length of the strip 12, the positioning of the third articulation 18 allows an easily actuable movement of the strip 12 on the shell 1.

[0036] According to one example, the third articulation 18 is a slide, preferably describing a curvilinear profile, and more preferably in an arc of a circle.

[0037] In the same way as for the second articulation 15, the slide of the third articulation 18 allows an overall rotational movement of the strip 12 around the first articulation 13.

[0038] According to one example, the closure flap 8 comprises a raised member 20 projecting towards a space opposite the external surface 7, preferably, the raised member 20 is positioned at the level of the third articulation 18.

[0039] Thus, the projection of the raised member 20 allows for easier gripping of the closure flap 8.

[0040] According to one example, the first direction 5 is perpendicular to a frontal section 21 of the hull 1.

[0041] Thus, this configuration allows for easy movement of the shutter 8 on the shell 1. Indeed, this configuration allows the user to perform a physiological movement in order to move the shutter 8.

[0042] According to one example, the first end 14 is configured so as to obstruct an opening 28 of the associated series of ventilation openings 4, in the first position 9.

[0043] According to one example, the shell 1 comprises, for each closure flap 8, a border 22 on one side of the series of ventilation openings 4 associated along the first direction 5, the border 22 forming a stop for the closure flap 8.

[0044] Thus, this border gives the user a reference to know whether the openings have been completely blocked.

[0045] According to one example, the edge 22 is located between an intersection of the external surface 7 with a sagittal section 23 and an intersection of the external surface 7 with a transverse section 24 located in the middle of the shell 1.

[0046] Thus, by this configuration, it is possible to select the desired position of the openings on the shell 1.

[0047] According to one example, the second articulation 15 comprises a slot 25 formed in the shell and configured to receive the second end 16 of the closure flap 8.

[0048] According to one example, the second end 16 comprises an extension 26, the slot 25 being configured so that the extension 26 slides therein.

[0049] Thanks to this configuration, the strip 12 can cross the slot 25 by sliding to pass from the first position 9 to the second position 10. For this, the extension 26 has a width adjusted to that of the slot 25.

[0050] Thanks to the positioning of the slot 25, the surface area thus occupied by the second articulation 15 is minimized. Thus, the second articulation 15 does not occupy a space which could have been used to position a greater number of ventilation openings.

[0051] According to one example, the adjustment system 3 comprises two shutters 8 each being associated with a separate series of ventilation openings 4.

[0052] It is specified that in the context of the present invention, the expression "mobile by sliding on the hull" means that the element in question can move relative to the hull while remaining in contact with the latter.

[0053] The term “elongated shape” means a shape having a length dimension greater than at least 1.5 times its width dimension. In the context of the present invention, this “elongated shape” may have rectilinear sides or sides following arcs of a circle.

[0054] The terms "upper / lower" or "under / over" or "below / above" should be interpreted taking into account the normal positioning of a helmet on a user's head. An upper part will then be positioned above a lower part.

[0055] The term "adjusted" in the context "the extension 26 having a width adjusted to that of the slot 25" means that the extension 26 has almost the same width as the slot 25 so that the extension 26 completely blocks the slot 25 when the shutter 8 is in the first position 9. This adjustment is sliding to allow the shutter to move in the slot 25.

[0056] According to one embodiment, as illustrated in [Fig.l], the helmet comprises a shell 1 and a ventilation adjustment system 3. The shell 1 forms the limits of an interior volume 2 for protecting the head of a user so as to circumscribe the interior volume 2. The shell 1 comprises at least one series of ventilation openings 4, an internal surface 6 and an external surface 7. The at least one series of ventilation openings 4 is configured so that the openings are arranged one after the other in a first direction 5. The internal surface 6 is contiguous to the interior volume 2. The external surface 7 is the other surface of the shell 1 which extends parallel to the internal surface 6. The at least one series of ventilation openings 4 pierces the shell 1 in a direction normal to the internal surface 6 and to the external surface 7 at the points considered.

[0057] The ventilation adjustment system 3 comprises at least one shutter 8. Each series of ventilation openings 4 is associated with a separate shutter. The shutter 8 moves between at least a first position 9 of the shutter 8 on the series of ventilation openings 4 and a second position 10 of the shutter 8, separate from the first position 9, on the series of ventilation openings 4. The extent of the series of ventilation openings 4 covered in the first position 9 is greater than an extent of the series of ventilation openings 4 covered in the second position 10. The shutter 8 moves while remaining in contact with the external surface 7 in a second direction 11 at an angle to the first direction 5.

[0058] The shell 1 can be made of a material having shock-absorbing properties.

[0059] Preferably, the series of ventilation openings 4 is completely covered in the first position 9. According to a preferred embodiment, the series of ventilation openings 4 is completely uncovered in the second position 10.

[0060] Preferably, the adjustment system 3 comprises at least two shutters 8 and consequently at least two series of ventilation openings 4, and preferably strictly two of such shutter / series assemblies. Each series of openings ventilation is associated with a separate shutter. The two shutters can be, like the series of openings, arranged symmetrically relative to a sagittal plane of the shell, so as to ventilate two different sides of the helmet.

[0061] The shell 1 may have a thickness of between 2 cm and 6 cm. The shell 1 may be made of thermoplastic materials, for example polystyrene, or of composite materials, in order to obtain sufficient cushioning for the safety of the user in the event of falls. Unlike thermoplastic materials (which have a smooth surface), composite materials make it possible to limit sliding movements upon contact with them because these materials have roughness on their surface. The shell 1 may be covered with a polymer material advantageously reinforced with fibers in order to create a rigid envelope making it possible to protect the shell 1; composite materials, in particular with an organic matrix and fibers, in particular glass or carbon fibers, may advantageously be used.

[0062] The openings of the at least one series of ventilation openings 4 may be four in number. The openings of the at least one series of ventilation openings 4 may also be two, three, six or eight in number. The openings of the at least one series of ventilation openings 4 may be spaced apart by the same distance or by a variable distance depending on the opening in question. The distance separating the openings may be greater than 2 cm. It may, for example, be equal to 10 cm. The at least one series of ventilation openings 4 may also consist of a single opening whose length dimension will preferably be between three-quarters of the length dimension of the strip 12 and half of the length dimension of the strip 12.

[0063] The openings of the at least one series of ventilation openings 4 may have a rectangular, square, rounded rectangular, rounded square, round shape or any other shape allowing sufficient air inlet such as a triangular shape. The surfaces of the openings allowing air inlet may have a value greater than 2 cm2.

[0064] Several series of ventilation openings 4 can be positioned on the shell 1. Thus, two, three or four series of ventilation openings 4 can be distributed on the shell 1 with a constant or variable distance between each. The distance between the series of ventilation openings 4 can be greater than 2 cm. It can, for example, be 6 cm.

[0065] The shell 1 can delimit an interior volume 2 for protecting the head of a user. The shape of the shell 1 can be configured so as to fit the shape of a human being's head.

[0066] Advantageously, the closure flap 8 comprises a strip 12. The strip 12 may be rigid and have a shape enabling it to match the shape of the helmet. The strip 12 can also be flexible and in particular at the level of the second end 16 of the shutter 8 and of the extension 26.

[0067] Preferably, the strip 12 has an extended shape. The strip 12 extends lengthwise in the first direction 5, in the first position 9.

[0068] The strip 12 may have a width of between 4 cm and 8 cm. The length of the strip 12 may be greater than 20 cm. It may, for example, be 30 cm. The thickness of the strip 12 may be greater than 0.1 cm. It may be, for example, 0.5 cm.

[0069] The strip 12 may have straight or rounded edges so as to follow arcs of circles. The variability of the shape of the strip 12 allows the strip 12 to match the curvature of the edge 22 depending on the position of the edge 22 between the top of the shell 1 and the middle of the shell 1 (the middle being located halfway between the top of the shell 1 and the part of the shell 1 opposite the top of the shell 1). According to a preferred example, the strip 12 is flat at rest and is deformed in flexion when it is mounted on the helmet by means of the articulations. This deformation is advantageously elastic in the sense that it is reversible if the strip 12 is removed. It is advantageous for the strip 12 to match the shell 1 for aerodynamic reasons, avoiding air passages between these two parts; preferably, the strip 12 comprises an internal surface which is completely in contact with the shell 1, making this contact surface-like.

[0070] The strip 12 may be, or at least comprise, a layer of a material providing impermeability to water. This material may be a polymer possibly reinforced with fibers.

[0071] Thus, the strip 12 may have a layer of laminated material on the face of the strip 12 in contact with the external surface 7, so as to increase the sealing of the strip 12 against water which could reach the user's head by passing through the series of ventilation openings 4. The positioning of this laminated material also has the function of preventing the strip 12 from being scratched when it moves on the external surface 7 of the shell. This material may be made of felt or an Alcantara-type fabric.

[0072] Advantageously, the adjustment system 3 comprises, for each shutter 8, a first articulation 13 configured to create a connection between a first end 14 of the shutter and the shell 1. In an advantageous embodiment, the adjustment system 3 comprises a second articulation 15 configured to create a connection between a second end 16 of the shutter and the shell 1. The first end 14 can be configured so as to cover an opening 28 of the associated series of ventilation openings, in the first position 9.

[0073] Preferably, the first articulation 13 is a pivot connection defined by a axis of rotation. The axis of rotation is preferably perpendicular to the shell 1. The pivot connection is positioned in the area where the first articulation 13 is located. The first articulation 13 is for example located at a distance of between 3 cm and 7 cm from the part of the shell 1 opposite the top of the shell 1.

[0074] Advantageously, the closure flap 8 comprises an arm 17 secured to the strip 12. The first articulation 13 is located in the zone where the arm 17 is situated.

[0075] According to one possibility, the second articulation 15 is a sliding connection. Preferably, the sliding connection of the second articulation 15 allows a rectilinear translational movement. Advantageously, the second articulation 15 is a slide describing an arc.

[0076] The second articulation 15 is located at a distance greater than 3 cm from the part of the shell 1 opposite the top of the shell 1. This distance can, for example, be 7 cm.

[0077] The sliding connection of the second articulation 15 can allow translation over a distance greater than 3 cm. This distance can, for example, be 7 cm.

[0078] According to a preferred embodiment, the adjustment system 3 comprises, for each shutter, a third articulation 18 configured to create a connection between the shell 1 and an intermediate portion 19 of the shutter. The intermediate portion 19 of the shutter is located between the first end 14 of the shutter and the second end 16 of the shutter in the first direction 5.

[0079] Preferably, the third articulation 18 is a sliding connection. Preferably, the sliding connection of the third articulation 18 allows movement along a curved line. This curved line may be an arc of a circle.

[0080] The third articulation 18 preferably comprises at the edge 22 a plastic insert allowing, once engaged, to keep the strip 12 positioned so that the series of ventilation openings 4 is completely obstructed.

[0081] The third articulation 18 may be located midway between the first end 14 of the flap and the second end 16 of the flap.

[0082] The sliding connection of the third articulation 18 can allow translation over a distance greater than 3 cm. This distance can be 7 cm.

[0083] The translation directions of the sliding connection of the third articulation 18 and of the sliding connection of the second articulation 15 are oriented so that the strip 12 can move in the second direction 11 which is defined obliquely relative to the first direction 5.

[0084] Advantageously, the closure flap 8 comprises a raised member 20. The raised member 20 has a protrusion directed towards a space opposite the external surface 7. Preferably, the raised member 20 is positioned at the level of the third articulation 18.

[0085] The relief member 20 can also be positioned at another position between the first end 14 of the flap and the second end 16 of the flap.

[0086] The raised member 20 may be positioned on the side of the strip 12 closest to the edge 22. The raised member 20 may protrude by a thickness greater than 1 cm (this thickness may be 4 cm). The raised member 20 may have a length greater than 2 cm (this length may be 5 cm). The raised member 20 may have a width greater than 2 cm (this width may be 6 cm). The raised member 20 may have any shape (and have a hollow area oriented towards the edge 22) allowing the raised member 20 to be grasped more easily.

[0087] Since the third articulation 18 can be located midway between the first end 14 of the flap and the second end 16 of the flap, the raised member 20 can also be positioned midway between the first end 14 of the flap and the second end 16 of the flap.

[0088] Advantageously, the first direction 5 is perpendicular to a front section 21 of the shell 1. This original arrangement promotes good air flow along the strip 12, in particular in the closed position, because the edge 22 of the strip 12 forms a slight obstacle to the air flow in this direction.

[0089] Preferably, the shell 1 comprises, for each shutter, a border 22 located at the level of an edge of the series of ventilation openings 4 associated in the first direction 5. The border 22 forms a rim for the shutter 8 having the function of stopping its movement.

[0090] The edge 22 may have a width greater than 0.5 cm so as to reduce the thickness of the shell 1 by the value of this width (this width may, for example, be 4 cm). Thus, in the case where one or two shutters are on the shell 1, the shell 1 has two thicknesses, one being located on one side of the edge 22 and the other being located on the other side of the edge 22. The edge 22 may extend between the two ends of the shell 1 at which it is positioned.

[0091] According to a preferred embodiment, the edge 22 is located between an intersection between the external surface 7 and a sagittal section 23 and an intersection between the external surface 7 and a transverse section 24 located in the middle of the shell 1, that is to say halfway between the top of the shell 1 and the end of the shell 1 opposite the top of the shell 1.

[0092] Preferably, the second articulation 15 comprises a slot 25 formed in the shell 1 and perpendicular to the edge 22. The slot 25 can be positioned at the position of the second end 16 of the flap when the ventilation openings 4 are completely open. Preferably, the strip 12 is received in the slot 25 which provides it with sliding guidance. The strip 12 advantageously comprises at the second end 16 of the flap an extension 26. slot 25 is configured so that the extension 26 slides into an area between the inner surface 6 and the outer surface 7 when the series of ventilation openings 4 is fully open and in a position between the first position 9 and the second position 10.

[0093] The slot 25 may have a width greater than that of the second end 16 of the flap and the extension 26 may also have a width greater than the second end 16 of the flap and in particular the extension 26 may have almost the same width as the slot 25 (i.e. the width of the slot 25 less one or two millimeters) so that the extension 26 completely blocks the slot 25 when going from the second position 10 to the first position 9. This configuration allows for a more stable sliding of the extension 26 in the slot 25. Indeed, a significant deviation on one of the ends of the slot 25 cannot occur. The extension 26 may also form a crook, i.e. the extension 26 may be curved relative to the second end 16 of the flap.This crosspiece can make it possible to form a blocking zone for the strip 12 in the slot 25 (in particular when the series of ventilation openings are clear).

[0094] The slot 25 may have a width of between 7 and 14 cm. The extension may have a width of between 7 and 14 cm and a length of between 4 cm and 8 cm. The extension may be made of the same material as the second end 16 of the flap, i.e. of a waterproof material. In order to allow the passage of the strip 12, the slot 25 may have an opening with a thickness of between 1 mm and 2 mm.

[0095] According to one possibility, the internal part 29 of the slot 25, that is to say the part constituting the slot 25 between the internal surface 6 and the external surface 7, can be covered with a rubber material (or another elastomer) so as to form a watertight lip around the flap, this in order to prevent water from entering the helmet between the internal surface 6 and the external surface 7.

[0096] Advantageously, the helmet comprises at least one extended zone 27 forming an excess thickness on the shell 1. The zone 27 can be positioned so as to form a right angle with the edge 22. The zone 27 can also be curved so as to form a right angle with all the edges 22 present on the shell 1. It matches the external surface of the shell. Each zone 27 can extend horizontally and have a curvilinear profile extending from the right side of the shell to the left side, at the rear of the shell. The zone 27 is positioned so that the part of the at least one zone 27 closest to the top of the helmet is located at the level of the slot 25. There can be several zones 27 which will then be located under the zone 27 comprising the slot 25, this considering the normal positioning of a helmet on the head of a user.

[0097] Thus, the zones 27, due to their rigidity and their location, protect the neck, in particular from impacts. The zones 27 therefore provide rigidity to the helmet. Indeed, the zones 27 are advantageously made of the same material as that of the shell 1. Due to the positioning of the zones 27, the positioning of the slot 25 has the function of limiting the surface area on the shell 1 occupied by the second articulation 15. Indeed, the zones 27 occupying a large surface area on the shell 1, it is desirable to reduce as much as possible the surface area occupied by the elements of the adjustment system 3 on the shell 1.

[0098] There may be one zone 27, two zones 27, three zones 27 or four zones 27. The zones 27 may have a width of between 3 cm and 8 cm. The zones 27 may have different widths from each other. The zones 27 may extend over the entire circumference of the shell 1 or may extend partially over the circumference of the shell 1, i.e. from 30% to 80% of the circumference of the shell 1. The zones 27 may extend over a part of the circumference of the shell 1 that differs in size and position from each other. The zones 27 may have a thickness of between 2 and 4 cm. The zones 27 may have different thicknesses from each other. The zones 27 may have (as illustrated in [Fig.7B]) a rectangular profile with right angles. Also, the zones 27 can present (as illustrated in [Fig.5]) a rounded profile.The zones 27 may be made of the same material as the shell 1, i.e. the zones 27 may be made of polymer in order to create a rigid structure or of composite materials, in particular with an organic matrix and glass or carbon fibers. The zones 27 may be hollow and have openings so as to allow air to reach the user's head. These openings form vents and are advantageously positioned on the lower part (depending on the normal direction of use of a helmet on a user's head) of the zones 27 which form an angle of between 70° and 110° with the shell 1, so that water coming from the top of the helmet cannot reach the user's head by passing through these openings. These openings may be uniformly distributed along the zones 27. The zones 27 may comprise between 3 and 7 openings. These openings may have a size of 1 cm by 2 cm.They can therefore have an elongated shape with rounded corners.

[0099] As illustrated in [Fig.5], the extension 26 can pass between the zones 27 and the shell 1 so that the strip 12 is partly visible through the zones 27. A space is provided between the shell 1 and the zones 27 to allow clearance space for the end of the strip 12. As illustrated in [Fig.7A], the extension 26 can also pass completely between the shell 1 and the zones 27 so that the extension 26 is not visible through the zones 27.

[0100] A smooth covering 30 may be positioned between the shell and the slot 25 (and also therefore between the shell and the zones 27, the extension 26 therefore passing between this coating 30 and the slot 25 and the zones 27). This smooth coating allows easy sliding of the extension 26 in the slot 25. In order to allow the positioning of the coating 30 without hindering the sliding of the extension 26 in the slot 25, the shell has a slight clearance at the level of the passage of the extension 26 inside the shell to accommodate the coating 30. The end of the extension 26 inside the helmet can be positioned at all points of the position interval 31, depending on the level of coverage of the series of ventilation openings 4 by the shutter 8.

[0101] The invention provides the possibility of positioning a visor that is integral with the helmet. This visor makes it possible to protect part or all of the face of the user of the helmet. This visor may include openings in its upper part (i.e. in the part that is in integral contact with the helmet). The openings (of the visor) have the function that when the visor is raised on the helmet, the openings allow air to pass through the visor to reach the series of ventilation openings 4 to ventilate the user's head (the visor therefore does not obstruct the passage of air to the series of ventilation openings 4).

[0102] The invention is not limited to the embodiments previously described and extends to all embodiments covered by the invention.

[0103] List of references: 1. Hull 2. Interior volume 3. Adjustment system 4. Series of ventilation openings 5. First direction 6. Internal surface 7. External surface 8. Shutter 9. First position 10. Second position 11. Second direction 12. Band 13. First joint 14. First end 15. Second joint 16. Second end 17. Arms 18. Third joint 19. Intermediate portion 20. Raised organ 21. Frontal cut 22. Border 23. Sagittal section 24. Cross section 25. Lunge 26. Extension 27. Zone 28. Opening 29. Internal part 30. Coating 31. Position interval

Claims

Demands

1. Helmet comprising a shell (1) delimiting an internal volume (2) for protecting the head of a user and a ventilation adjustment system (3), wherein the shell (1) comprises at least one series of ventilation openings (4) following one another in a first direction (5), an internal surface (6) in contact with the internal volume (2) and an external surface (7) opposite the internal surface (6), wherein at least one series of ventilation openings (4) passes through the shell (1) from the internal surface (6) to the external surface (7), wherein the ventilation adjustment system (3) comprises, for each series of ventilation openings (4), a shutter (8), and wherein the shutter (8) is movable between at least a first position (9) relative to the associated series of ventilation openings (4) and a second position (10), different from the first position (9), relative to the series of ventilation openings (4) associate,an obstructed surface of the series of ventilation openings (4) associated in the first position (9) being greater than an obstructed surface of the series of ventilation openings (4) associated in the second position (10), characterized in that the shutter (8) is movable by sliding on the external surface (7) along a second direction (11) oblique relative to the first direction (5), the shutter (8) comprising a band (12), and in which the adjustment system (3) comprises, for each shutter (8), a first hinge (13) configured to articulate a first end (14) of the shutter (8) on the shell (1) and a second hinge (15) configured to articulate a second end (16) of the shutter (8) on the shell (1), the shutter (8) comprising an arm (17) connected to the band (12) and on which the first hinge is located (13),in which the first joint (13) is a pivot comprising an axis of rotation.

2. Helmet according to the preceding claim in which the band (12) has an elongated shape, one length dimension of the band (12) being directed along the first direction (5), in the first position (9).

3. Helmet according to any one of the preceding claims, wherein the axis of rotation is directed along a normal to the shell (1) at the level of the first articulation (13).

4. Helmet according to any one of the preceding claims, wherein the second hinge (15) is a slide, preferably straight.

5. Helmet according to any one of the preceding claims wherein the adjustment system (3) comprises, for each shutter flap (8), a third hinge (18) configured to hinge on the shell (1) an intermediate portion (19) of the shutter flap (8) located between the first end (14) of the shutter flap (8) and the second end (16) of the shutter flap (8).

6. Helmet according to the preceding claim in which the third articulation (18) is a slide, describing, preferably, a curvilinear profile, and more preferably an arc of a circle.

7. Helmet according to any one of claims 5 or 6 wherein the shutter flap (8) comprises a raised element (20) projecting towards a space opposite the external surface (7), preferably, the raised element (20) is positioned at the level of the third joint (18).

8. Helmet according to any one of the preceding claims wherein the second hinge (15) includes a slot (25) formed in the shell and configured to receive the second end (16) of the shutter flap (8).

9. Helmet according to the preceding claim, in which the second end (16) includes an extension (26), the slot (25) being configured so that the extension (26) slides into it.

10. Helmet according to any one of the preceding claims wherein the first end (14) is configured to obstruct an opening (28) of the associated series of ventilation openings (4), in the first position (9).

11. Helmet according to any one of the preceding claims, wherein the shell (1) comprises, for each shutter flap (8), a rim (22) on one side of the series of ventilation openings (4) associated along the first direction (5), the rim (22) forming a stop for the shutter flap (8).

12. Helmet according to the preceding claim in which the rim (22) is located between an intersection of the external surface (7) with a sagittal section (23) and an intersection of the external surface (7) with a cross section (24) located in the middle of the shell (1).

13. Helmet according to any one of the preceding claims, wherein the first direction (5) is perpendicular to a frontal section (21) of the shell (1).

14. Helmet according to any one of the preceding claims wherein the series of ventilation openings (4) is completely obstructed in the first position (9) and / or wherein the series of ventilation openings (4) is completely open in the second position (10).

15. Helmet according to any one of the preceding claims wherein the adjustment system (3) comprises two shutter flaps (8) each being associated with a series of separate ventilation openings (4).

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