Absorption structure with customisable zones for body protection

Abstract

The invention relates to an absorption structure (1) for body protection (35) comprising a plurality of three-dimensional patterns (3), wherein each three-dimensional pattern (3) comprises a plurality of uprights interconnected with one another; at least two customisable zones (15), wherein each customisable zone (15) comprises three-dimensional patterns (3) defining a corresponding region of the absorption structure (1), and wherein the three-dimensional patterns (3) of a customisable zone (15) have a specific material density corresponding to a reference density from among at least two reference densities.

Description

[0001] DESCRIPTION

[0002] TITLE: Absorption structure with customizable zones for body protection

[0003] Field of invention

[0004] The present invention relates to an absorption structure with customizable zones for body protection, in particular for a knee pad.

[0005] Prior art

[0006] It is known to use shock-absorbing structures as body protection to cushion impacts during sports. The shock-absorbing structures may have reinforced sections that correspond to a highly stressed body location.

[0007] Furthermore, practitioners request a customization of absorption structures to their sporting practice but also to their personal preferences and / or physical characteristics such as more fragile or sensitive areas.

[0008] Thus, it is known not only to have absorption structures with certain reinforced parts but also to adapt the location and consistency of the reinforcement to the specificities of the user.

[0009] However, since the customization of absorption structures is different for each practitioner, the problem arises of the cost and difficulty of mass-producing body protection.

[0010] Indeed, not every practitioner, especially an amateur, is ready to have custom-made body protection made individually.

[0011] There are therefore conflicting needs on the part of sports practitioners who want protection adapted to their morphology, practice and / or personal preferences while being available at a lower cost and without requiring any particular procedure to measure the body part to be protected.

[0012] The present invention aims to solve all or part of the drawbacks mentioned above. Description of the invention

[0013] To this end, the present invention relates to an absorption structure for body protection, the absorption structure comprising: a plurality of three-dimensional patterns, each three-dimensional pattern being linked to one or more adjacent three-dimensional patterns so as to generate the absorption structure having a low total thickness compared to an extension surface of said absorption structure, each three-dimensional pattern comprising a plurality of uprights linked to each other, at least two customizable zones, each customizable zone comprising three-dimensional patterns defining a corresponding region of the absorption structure, the three-dimensional patterns of a customizable zone having a determined material density corresponding to a reference density among at least two reference densities.

[0014] Each three-dimensional pattern consists of interconnected studs. The studs constituting the three-dimensional pattern are characterized by a specific material density.

[0015] The absorption structure thus has, according to one example, two customizable zones of medium density and also a customizable zone of low density and another customizable zone of high density.

[0016] By customizable, it is understood that the combination of reference densities can be different from one absorption structure to another. Thus, with an identical general structure, it is possible to obtain different damping characteristics by adapting the density of the customizable areas. In this sense, this absorption structure is a customizable absorption structure.

[0017] By varying the material density, a customizable reinforced area of ​​the absorption structure is obtained.

[0018] It thus appears that the use of three-dimensional patterns organized into customizable zones makes it possible to create body protection that adapts both to the body surface to be covered and to the intensity of the protection adapted to the user.

[0019] The absorption structure is thus optimally designed to both facilitate production and present “tailor-made” properties chosen by the user.

[0020] According to one aspect of the invention, each reference density corresponds to a defined diameter or width of uprights, the uprights of customizable zones of different reference densities being geometrically organized in the same manner.

[0021] The criterion that defines the material density of three-dimensional patterns is not the geometry defining the spatial arrangement but the diameter or width of the uprights.

[0022] Thus, from one absorption structure to another, there is only one structural difference: the amounts of certain customizable areas are more or less large.

[0023] This arrangement facilitates mass production of the absorption structure because there are few structural differences between two customized copies.

[0024] According to one aspect of the invention, the determined material density corresponds to a reference density among three reference densities. Preferably, the three reference densities comprise a low density, a medium density and a high density.

[0025] This limitation to three densities is advantageous because although the choice is limited, it is sufficient for the practitioner to find the density that suits him.

[0026] According to one aspect of the invention, the medium density is about twice the low density and the high density is about three times the low density.

[0027] Preferably, the low density is between 50 and 150 g / l. In one example, the low density is 101 g / l, the medium density is 200 g / l and the high density is 349 g / l.

[0028] The fact that the three-dimensional pattern used has a density between 100 and 350 g / L can be important for many reasons.

[0029] Material density influences durability and impact resistance. A denser three-dimensional pattern will generally be more durable and impact resistant than a less dense three-dimensional pattern.

[0030] According to one aspect of the invention, the medium density corresponds to a diameter or width of the upright 10 to 20% and in particular about 15% greater than that of the low density. The high density corresponds to a diameter or width of the upright 20 to 40% and in particular about 30% greater than that of the low density.

[0031] The diameter or width influences the ability to absorb shock. A thicker three-dimensional pattern will generally be better able to absorb shock than a thinner three-dimensional pattern. The diameter or width can vary depending on its applications and desired performance requirements. It can be thin and lightweight, making it ideal for sports where mobility and lightness are key factors, or thicker and more robust for use in more demanding applications.

[0032] Preferably, low density corresponds to a stud diameter or width of 0.7 and 1.3 mm, medium density 1.8 to 2 mm, high density 2 and 3 mm.

[0033] The diameter or width of the uprights of the three-dimensional pattern is an important element, as it determines the robustness and resistance of the absorption structure.

[0034] A larger diameter or width can provide greater strength, but can also make the absorption structure heavier and less flexible. It is recommended to find a balance between strength, lightness, and flexibility to achieve a high-performance and comfortable absorption structure.

[0035] In summary, the characteristics of the three-dimensional pattern can be important for performance and durability.

[0036] According to one aspect of the invention, the diameter or width of the amount varies progressively between two contiguous customizable zones.

[0037] Alternatively, each three-dimensional pattern is linked to one or more three-dimensional patterns by sharing common uprights. This gives the absorption structure a certain rigidity.

[0038] According to one aspect of the invention, each three-dimensional pattern is linked to one or more adjacent three-dimensional patterns by one or more corresponding links, each link being adapted to allow a relative displacement of a defined amplitude of said three-dimensional pattern with respect to the adjacent three-dimensional pattern(s) in at least one direction.

[0039] This arrangement gives the absorption structure a certain flexibility. The body protection created by the absorption structure thus adapts to the shape of the body part to be protected without it being necessary to plan in advance where the absorption structure will bend.

[0040] Furthermore, when using the absorption structure, this flexibility allows for deformation improving shock absorption.

[0041] Preferably, each link is generated by an interlocking of uprights of two adjacent three-dimensional patterns. In particular, the interlocking corresponds to a closed loop of uprights of a first three-dimensional pattern through which another closed loop of uprights of a second three-dimensional pattern passes.

[0042] Closed loops can be arranged in several different geometries so as to define the defined amplitude and direction(s) of relative freedom of movement.

[0043] In one example, two loop uprights may have an angle, preferably a right angle, suitable for cooperating with another similar angle of two uprights of a complementary loop.

[0044] This structure promotes centering between the junctions at a single point. Each three-dimensional pattern maintains its alignment with the adjacent three-dimensional pattern(s) during extension. Also, a direction of movement is favored, depending on the direction of extension of the angle, with lateral movements being limited.

[0045] In another example, two loop uprights may have a zigzag bend, that is, a bend which, instead of having an angle formed by two uprights, comprises at least three uprights. A central upright extends laterally relative to the two adjoining uprights connected to the ends of the central upright.

[0046] This structure allows for lateral movement, thus providing greater freedom of movement. In addition, it is possible to adjust the structure's freedom of movement, for example by changing the size of the central upright.

[0047] In this case, the range of movement of the three-dimensional pattern is in two directions: one lateral according to the orientation of the central upright and one longitudinal.

[0048] According to one aspect of the invention, the three-dimensional patterns are lattice patterns, the absorption structure comprising additional posts configured to generate the contours of the absorption structure.

[0049] This construction of the absorption structure by jointly manufactured uprights is advantageous compared to an absorption structure comprising several separate parts mounted together.

[0050] In fact, you get a single piece with customizable zones that have different densities and therefore shock absorption. There is no need to add an additional layer or reinforcement piece to achieve this personalized protection.

[0051] Using additional uprights that are part of the same part as the three-dimensional patterns to define the contours is also advantageous. The absorption structure can be manufactured in a single step by jointly producing the three-dimensional patterns and the additional uprights.

[0052] The lattice patterns are adjacent to each other so as to present a lattice structure or lattice structure.

[0053] This structure is a combination of interconnected uprights and empty spaces between the uprights. This lattice structure provides high shock absorption and good energy return.

[0054] According to one aspect of the invention, the three-dimensional patterns are fourteen-sided polyhedra.

[0055] The three-dimensional pattern is an elementary pattern which is a fourteen-sided polyhedron also called vintile, Kelvin pattern, tetrakaidecahedron, truncated octahedron, Archimedean solid or permutohedron.

[0056] The three-dimensional pattern is formed by truncating the corners of an octahedron. This means that the edges that meet at the apex of each corner of the octahedron are cut off, so that the resulting faces are hexagons and squares rather than regular triangles.

[0057] According to one aspect of the invention, the truncated octahedron has 14 faces, including 8 hexagonal faces and 6 square faces. Each three-dimensional pattern has 24 vertices and 36 edges, the edges being the uprights of the three-dimensional pattern.

[0058] Vinyl has interesting geometric properties, particularly for improving shock absorption.

[0059] Alternatively, the lattice structure can be based on planes. This is called a "planar-based lattice." This category includes structures that rely on planar patterns, such as the honeycomb pattern and other plane-based designs.

[0060] Alternatively, the lattice structure can be based on beams. This is called a "strut-based lattice." This category is advantageous for the absorption structure due to its observed damping characteristics.

[0061] Additionally, the lattice structure can be surface-based. This is called a "surface-based lattice." This category includes surface-based structures such as the Triply Periodic Minimal Surfaces (TPMS) pattern and the gyroid, among others.

[0062] It thus appears possible to produce an absorption structure according to several lattice structure geometries, each geometry being able to be advantageous depending on the chosen application. According to one aspect of the invention, the total thickness of the absorption structure is two three-dimensional patterns and in which each three-dimensional pattern has a specific thickness at least twice less than a longitudinal dimension and / or a lateral dimension of said three-dimensional pattern.

[0063] This proportion of the three-dimensional pattern as well as the number of three-dimensional patterns constituting the total thickness of the absorption structure exhibit good behavior in terms of shock absorption and in terms of flexibility and rigidity for all reference densities.

[0064] According to one aspect of the invention, the longitudinal dimension is equal to the lateral dimension. Preferably, the longitudinal dimension is 2 cm, the lateral dimension is 2 cm and the proper thickness of a three-dimensional pattern is 0.7 cm. This means that the three-dimensional pattern repeats every 2 cm in the planar directions.

[0065] According to one aspect of the invention, the absorption structure comprises at least one articulation formed between two parts of the absorption structure, each part comprising at least two customizable zones.

[0066] According to one aspect of the invention, additional amounts of the absorption structure may be used to generate the at least one articulation.

[0067] According to one aspect of the invention, the absorption structure comprises a first articulation between a central portion and a first lateral portion and a second articulation between the central portion and a second lateral portion.

[0068] The first joint and the second joint correspond to the at least one joint mentioned above.

[0069] This arrangement favors certain uses of body protection requiring a certain curvature of the customizable adaptation structure.

[0070] The three-dimensional shape of the absorption structure is thus substantially flat, which simplifies manufacturing compared to a highly curved hingeless structure.

[0071] According to one aspect of the invention, the first articulation and the second articulation extend substantially parallel to a longitudinal direction of the absorption structure, the central part having three customizable zones aligned along the longitudinal direction, and the first lateral part and the second lateral part each having two customizable zones aligned along the longitudinal direction.

[0072] Alternatively, the plurality of three-dimensional patterns is arranged in a planar manner. In this case, all three-dimensional patterns may have identical dimensions. However, this is not mandatory and some three-dimensional patterns may have their size adjusted. This is particularly true near contours or joints.

[0073] Alternatively, the plurality of three-dimensional patterns are arranged to form a curved whole. This arrangement serves a dual purpose. On the one hand, the body protection adapts to the part of the body to be protected, and on the other hand, the absorption structure has limited lateral bulk, which facilitates production, which can be carried out in one go, and storage.

[0074] Preferably, some three-dimensional patterns are smaller or larger than others so as to generate a radius of curvature of the curved assembly.

[0075] The present invention also relates to a body protection comprising an absorption structure as described above and a cover designed to receive at least in part the absorption structure, said cover being configured to cooperate by form complementarity with the absorption structure.

[0076] The cover serves to both conceal and protect the absorption structure. Preferably, the cover is designed with a coating adapted to cooperate with a user's skin.

[0077] According to one aspect of the invention, the cover is removable. This arrangement facilitates the maintenance of the body protection, the cover being able to be washed or changed.

[0078] According to one aspect of the invention, the cover is configured to be disposed between hard or sharp edges of the absorption structure and the user's skin. Preferably, the cover may be perforated. It may also be smooth.

[0079] According to one aspect of the invention, the cover is configured to distribute forces evenly over the absorption structure following deformation induced by the user and / or an obstacle on which the user comes up against. This avoids creating weak points on the body protection.

[0080] According to one aspect of the invention, the cover is made of a textile material.

[0081] According to one aspect of the invention, different sizes of absorption structures can be provided, in particular by adding three-dimensional patterns longitudinally and / or laterally. The total thickness of the absorption structure and the size of the three-dimensional patterns can remain the same, only the extension surface varies.

[0082] According to one aspect of the invention, the body protection is suitable for use as a knee brace. The availability of customizable areas is particularly suitable for knee braces. The user can thus predict whether the kneecap, the top of the kneecap or the bottom of the kneecap, a high side or a low side should be reinforced.

[0083] The user can thus adapt the knee pad to their practice, their level and / or a sensitive area to protect, for example following a previous injury.

[0084] According to one aspect of the invention, the cover includes a user attachment system such as a two-part clamping system or an elastic sleeve system for fitting the body protection over the body part to be protected.

[0085] Alternatively, the absorption structure is suitable for use in other applications such as helmets, back protectors or any other body protection product against impacts.

[0086] The present invention further relates to a method for manufacturing an absorption structure as described above, comprising the following steps: providing a three-dimensional printing machine by additive manufacturing, providing geometric parameters of the absorption structure and customization parameters relating to the reference densities of each customizable area, carrying out the printing of the absorption structure by additive manufacturing with the printing machine.

[0087] This arrangement allows an absorption structure to be manufactured on demand, adapted to a user.

[0088] Inventory can be better managed by producing custom absorption structures for each user, rather than having to stock different sizes and models in anticipation of customer needs. This can reduce production and delivery times.

[0089] The ability to manufacture the absorption structure locally near the point of sale or delivery using additive manufacturing can also help reduce transportation costs and support the local economy.

[0090] According to one aspect of the invention, only one type of material is used for additive manufacturing printing. This arrangement is advantageous for recycling.

[0091] According to one aspect of the invention, the step of printing the absorption structure by additive manufacturing is carried out in a single step. In other words, the machine is configured to print the entire absorption structure without moving a first portion of the absorption structure already printed.

[0092] The machine includes a tray capable of completely containing the absorption structure or several absorption structures.

[0093] The presence of at least one joint is advantageous because it is possible to define an absorption structure in a substantially flat manner.

[0094] The absorption structure takes up less volume. It is possible to put more parts in the same production bin, which can improve production efficiency and profitability.

[0095] One-shot printing is also made possible by the presence of additional contour and joint amounts which are capable of generating the contours and at least one joint where applicable.

[0096] In particular, the at least one articulation is generated by one or more additional uprights extending along a line.

[0097] This one-piece print requires no gluing or stitching to complete the build.

[0098] According to one aspect of the invention, the manufacturing method comprises a prior step consisting of obtaining the geometric parameters and / or the personalization parameters from a control interface of the printing machine or from a remote server capable of communicating with the printing machine.

[0099] It is thus possible to define the customizable areas locally or remotely. In particular, the customization parameters can be obtained from a web page including a form or configurator to be completed by the user, the server being able to collect the customization parameters entered by the user.

[0100] According to one aspect of the invention, the customization parameters correspond to a direct entry of the determined material densities of the polarizable zones among the at least two reference densities.

[0101] This direct input can be performed on the control interface or on a remote interface connected to the remote server. For example, the remote interface can be a computer connected to the internet. The user can then configure the absorption structure he wishes to control himself.

[0102] Alternatively, the customization parameters correspond to an indirect entry of the determined material densities, the indirect entry corresponds to a choice of a practice category from a set of practice categories, the method comprising a step of transcribing the chosen practice category into determined material densities.

[0103] A practice category corresponds to a sport, position, and possibly the size and / or weight of a user.

[0104] According to one aspect of the invention, the geometric parameters correspond to the shape of each three-dimensional pattern, to the arrangement of the plurality of three-dimensional patterns generating the absorption structure and / or to the location and spatial configuration or contours of the regions corresponding to the customizable zones.

[0105] Alternatively, the geometric parameters are predetermined by the manufacturer and cannot be changed at the control interface or remote interface.

[0106] In this case, the user will only be able to modify the personalization settings.

[0107] Alternatively, the geometric parameters can, at least some of them, be modified by a user at the command interface or the remote interface.

[0108] In particular, it may be possible to enter parameters relating to at least one of the regions defining the customizable areas. The definition of a region may correspond to a contour drawing on the control interface or the remote interface or to the selection of an alternative for spatial definition of said region from a plurality of alternatives.

[0109] Thus, according to this possibility, not only the user can choose the density of the customizable zones but also their location and contours.

[0110] According to one aspect of the invention, the absorption structure can be obtained by different types of three-dimensional printing machine, in particular, of the type capable of producing thermoplastic parts, TPU, TPA, from filaments and / or resins.

[0111] The 3D printing machines used can generate material by polymerization, crosslinking, fusion or any other type of technical alternatives that allow the accumulation of material.

[0112] The different aspects defined above, which are not incompatible, can be combined. Brief description of the figures

[0113] The invention will be better understood with the aid of the detailed description which is set out below with reference to the accompanying drawings.

[0114] [Fig. 1] is a top view of a body protector comprising an absorption structure and a cover.

[0115] [Fig. 2] is a perspective and sectional view of customizable areas of the absorption structure.

[0116] [Fig. 3] is a perspective view of a three-dimensional pattern of the absorption structure.

[0117] [Fig. 4] is a schematic top view of a knee brace with seven customizable zones.

[0118] [Fig. 5] is a top and side view of customizable areas of the absorption structure.

[0119] [Fig. 6] is a diagram detailing the steps of a manufacturing process for the absorption structure.

[0120] [Fig. 7] is a schematic top view of an absorption structure in which geometric parameters have defined the outline of the customizable zones.

[0121] [Fig. 8] is a detailed side view of a portion of absorption structure obtained by the manufacturing process.

[0122] Description with reference to figures

[0123] In the detailed description which follows of the figures defined above, the same elements or elements fulfilling identical functions may retain the same references so as to simplify the understanding of the invention.

[0124] As illustrated in Figures 1 to 4, an absorption structure 1 comprises a plurality of three-dimensional patterns 3.

[0125] Each three-dimensional pattern 3 is linked to one or more adjacent three-dimensional patterns 3 so as to generate the absorption structure 1 having a low total thickness 5 compared to an extension surface 7 of said absorption structure 1.

[0126] Each three-dimensional pattern 3 comprises a plurality of uprights 9 connected to each other. The absorption structure 1 comprises at least one articulation 11 formed between two parts 13 of the absorption structure 1, here there are two articulations 11.

[0127] The absorption structure 1 may also not include a joint 11, the flexibility of the absorption structure 1 being generated in this case by the arrangement of the three-dimensional patterns 3 relative to each other.

[0128] The absorption structure 1 comprises at least two customizable areas 15 in each part 13. Each customizable area 15 comprises three-dimensional patterns 3 defining a corresponding region of the absorption structure 1.

[0129] The three-dimensional patterns 3 of a customizable zone 15 have a determined material density corresponding to a reference density among at least two reference densities.

[0130] Thus, each three-dimensional pattern 3 is made up of 9 uprights linked to each other. The 9 uprights constituting the three-dimensional pattern 3 are characterized by a determined material density.

[0131] Each reference density corresponds to a defined diameter or width 17 of uprights 9, the uprights 9 of customizable zones 15 of different reference densities being geometrically organized in the same way.

[0132] The criterion that defines the material density of the three-dimensional patterns 3 is not the geometry defining the spatial arrangement but the diameter or width 17 of the uprights 9.

[0133] Thus, from one absorption structure 1 to another, there is only one structural difference: the amounts 9 of certain customizable zones 15 are more or less large.

[0134] As illustrated in Figure 2, the determined material density corresponding to one of three reference densities. Preferably, the three reference densities include a low density 19, a medium density 21, and a high density 23.

[0135] The medium density 21 is about twice as high as the low density 19 and the high density 23 is about three times as high as the low density 19.

[0136] Preferably, the low density 19 is between 50 and 150 g / l. According to one example, the low density 19 is 101 g / l, the medium density 21 is 200 g / l and the high density 23 is 349 g / l.

[0137] The medium density 21 corresponds to a diameter or width 17 of the amount 9 greater by 10 to 20% and in particular by approximately 15% of that of the low density 19. The high density 23 corresponds to a diameter or width 17 of the amount 9 greater by 20 to 40% and in particular by approximately 30% of that of the low density 19.

[0138] The diameter or width 17 influences the ability to absorb shock. A thicker 3D pattern will generally be better able to absorb shock than a thinner 3D pattern.

[0139] The overall thickness 5 can vary depending on its applications and desired performance requirements. It can be thin and lightweight, making it ideal for sports where mobility and lightness are key factors, or thicker and more robust for use in more demanding applications.

[0140] Low density 19 corresponds to a diameter or width 17 of the upright of 0.7 to 1.3 mm, medium density of 1.8 to 2 mm, high density of 2 to 3 mm. In the example shown in Figure 2, the uprights 9 have a circular base.

[0141] This base can also be square or rectangular according to another example as in figure 3. In this case, one of the widths of the square can be increased or both to obtain the desired density.

[0142] The diameter or width 17 of the uprights 9 of the three-dimensional pattern 3 is an important element, because it determines the robustness and resistance of the absorption structure 1.

[0143] A larger diameter or width 17 may provide greater strength, but may also make the absorption structure 1 heavier and less flexible. It is recommended to find a balance between strength, lightness, and flexibility to achieve a high-performance and comfortable absorption structure 1.

[0144] In summary, the characteristics of the 3-dimensional pattern can be important for performance and durability.

[0145] The diameter or width 17 of the amount 9 varies progressively between two contiguous customizable zones 15.

[0146] According to one possibility shown in Figures 1 and 2, each three-dimensional pattern s is linked to one or more three-dimensional patterns 3 by sharing common uprights 9. This gives the absorption structure 1 a certain rigidity.

[0147] According to another possibility shown in Figure 5, each three-dimensional pattern 3 is linked to one or more adjacent three-dimensional patterns 3 by one or more corresponding links 24.

[0148] Each link 24 is designed to allow relative movement of a defined amplitude of said three-dimensional pattern with respect to the adjacent three-dimensional pattern(s) in at least one direction. This arrangement gives a certain flexibility to the absorption structure 1. The absorption structure 1 thus adapts to the shape of the part of the body to be protected without it being necessary to predict in advance the places where the absorption structure 1 will bend. The use of links 24 therefore makes it possible to avoid providing a joint 11. Of course, it is possible to combine links 24 and at least one joint 11 in the same absorption structure 1.

[0149] Preferably, each link 24 is generated by an interlocking of uprights 5 of two adjacent three-dimensional patterns 3. In particular, the interlocking corresponds to a closed loop of uprights 9 of a first three-dimensional pattern 3 through which another closed loop of uprights 9 of a second three-dimensional pattern 3 passes.

[0150] Closed loops can be arranged in several different geometries so as to define the amplitude and direction(s) of relative freedom of movement.

[0151] According to an example shown in the upper part of figure 5, two loop uprights 9 may have an angle, preferably a right angle 26 capable of cooperating with another similar angle 26 of two uprights 9 of a complementary loop.

[0152] This structure promotes centering between the junctions at a single point. Each three-dimensional pattern 3 maintains its alignment with the adjacent three-dimensional pattern(s) 3 during extension. Also, a direction of movement is favored, along an extension direction 28 of the angle 26, with lateral movements being limited.

[0153] According to another example shown in the lower part of Figure 5, two loop uprights 9 may have a zigzag bend, that is to say a bend which instead of having an angle formed by two uprights 9 comprises at least three uprights 9. A central upright 30 extends laterally relative to the two contiguous uprights 9 linked to the ends of the central upright 30.

[0154] This structure also allows for lateral movement compared to the structure above, thus providing greater freedom of movement. In addition, it is possible to adjust the structure's freedom of movement, for example by changing the size of the central upright.

[0155] In this case, the range of movement of the three-dimensional pattern is in two directions: one lateral according to the orientation of the central upright 30 and one longitudinal. As illustrated in Figures 2 and 3, the three-dimensional patterns 3 are lattice patterns, the absorption structure 1 comprising additional uprights 25 of contours and articulations configured to generate the contours and articulations 11 of the absorption structure 1.

[0156] The three-dimensional patterns 3 and the additional amounts 25 of contours and articulations are manufactured jointly.

[0157] The lattice patterns are adjacent to each other so as to present a lattice structure or lattice structure.

[0158] This structure corresponds to a combination of 9 uprights linked to each other and empty areas between the 9 uprights. This lattice structure provides a strong shock absorption capacity as well as good energy restitution.

[0159] As illustrated in Figure 3, the three-dimensional patterns 3 are fourteen-sided polyhedra.

[0160] The three-dimensional pattern 3 is an elementary pattern which is a fourteen-sided polyhedron also called vintile, Kelvin pattern, tetrakaidecahedron, truncated octahedron, Archimedean solid or permutohedron.

[0161] The three-dimensional pattern 3 is formed by truncating the corners of an octahedron. This means that the edges that meet at the vertex of each corner of the octahedron are cut off, so that the resulting faces are hexagons and squares rather than regular triangles.

[0162] The truncated octahedron has 14 faces, including 8 hexagonal faces and 6 square faces. Each three-dimensional pattern has 24 vertices and 36 edges, with the edges being the 9-pointers of the three-dimensional pattern.

[0163] Vinyl has interesting geometric properties, particularly for improving shock absorption.

[0164] The total thickness 5 of the absorption structure 1 is two three-dimensional patterns 3 and each three-dimensional pattern 3 has a specific thickness 27 at least twice less than a longitudinal dimension 29 and a lateral dimension 31 of said three-dimensional pattern 3.

[0165] The longitudinal dimension 31 is equal to the lateral dimension 29. Preferably, the longitudinal dimension 31 is 2 cm, the lateral dimension 29 is 2 cm and the proper thickness 27 of a three-dimensional pattern is 0.7 cm. This means that the three-dimensional pattern 3 repeats every 2 cm in the planar directions.

[0166] The absorption structure 1 comprises a first articulation 11a between a central part 13a and a first lateral part 13b and a second articulation 11b between the central part 13a and a second lateral part 13c. This arrangement favors certain uses requiring a certain curvature of the absorption structure 1. The three-dimensional shape of the absorption structure 1 is thus substantially planar.

[0167] The first articulation 11a and the second articulation 11b extend substantially parallel to a longitudinal direction 33 of the absorption structure 1, the central part having three customizable zones 15 aligned along the longitudinal direction 33, and the first lateral part 13b and the second lateral part 13b each having two customizable zones 15 aligned along the longitudinal direction 33.

[0168] According to one possibility, the plurality of three-dimensional patterns 3 is organized in a planar manner. In this case, all the three-dimensional patterns 3 may have identical dimensions. However, this is not mandatory and some three-dimensional patterns 3 may have their size adapted. This is particularly true near contours or joints.

[0169] Alternatively, the plurality of three-dimensional patterns 3 are arranged to form a curved assembly. This arrangement serves a dual purpose. On the one hand, the absorption structure 1 adapts to the part of the body to be protected, and on the other hand, the absorption structure 1 has limited lateral bulk, which facilitates production, which can be carried out in one go, and storage.

[0170] Preferably, some three-dimensional patterns 3 are smaller or larger than others so as to generate a radius of curvature of the curved assembly.

[0171] As illustrated in Figure 1, a body protector 35 comprises an absorption structure 1 as described above and a cover 37 adapted to receive at least in part the absorption structure 1.

[0172] The cover 37 is configured to cooperate by shape complementarity with the absorption structure 1.

[0173] The cover 37 serves both to conceal the absorption structure 1 and to protect it. Preferably, the cover 37 is designed as a covering adapted to cooperate with the skin of a user.

[0174] The cover 37 is removable. This arrangement facilitates the maintenance of the body protection 35, the cover being able to be washed or changed.

[0175] The cover 37 is configured to be disposed between hard or sharp edges of the absorption structure 1 and the user's skin. Preferably, the cover 37 may be perforated. It may also be smooth.

[0176] The cover 37 is configured to distribute the forces evenly over the absorption structure 1 following a deformation induced by the user and / or an obstacle on which the user comes up against. This avoids creating weak points on the body protection 35. The cover 37 is made of a textile material.

[0177] Depending on the uses, different sizes of absorption structures 1 can be provided, in particular by adding three-dimensional patterns 3 longitudinally and / or laterally. The total thickness 5 of the absorption structure 1 and the size of the three-dimensional patterns 3 can remain identical, only the extension surface 7 varies.

[0178] As illustrated in Figures 1 and 4, the body protector 35 is suitable for use as a knee pad.

[0179] Having 15 customizable zones is particularly suitable for knee braces. The user can thus plan whether the kneecap, the top of the kneecap or the bottom of the kneecap, a high side or a low side should be reinforced.

[0180] The user can thus adapt the knee pad to their practice, their level and / or a sensitive area to protect, for example following a previous injury.

[0181] The 37 cover includes a user attachment system such as a two-part clamping system or an elastic sleeve system for fitting the body protection over the body part to be protected.

[0182] Alternatively, the absorption structure 1 is suitable for use in other applications such as helmets, back protectors or any other body protection product against impacts.

[0183] As illustrated in Figure 6, a method of manufacturing an absorption structure 1 comprises the following steps:

[0184] To have a three-dimensional printing machine using additive manufacturing,

[0185] E2 have geometric parameters of the absorption structure 1 and customization parameters relating to the reference densities of each customizable zone 15,

[0186] E3 realize the printing of the absorption structure 1 by additive manufacturing with the printing machine.

[0187] This arrangement makes it possible to manufacture on demand an absorption structure 1 adapted to a user.

[0188] Inventory can be better managed by producing custom-made absorption structures 1 for each user, rather than having to stock different sizes and models in anticipation of customer needs. This can reduce production and delivery times. The ability to manufacture absorption structures 1 locally near the point of sale or delivery using additive manufacturing can also help reduce transportation costs and support the local economy.

[0189] Only one type of material is used for additive manufacturing printing. This arrangement is advantageous for recycling.

[0190] Step E3 of printing the absorption structure 1 by additive manufacturing is carried out in one go.

[0191] In other words, the machine is configured to print the entire absorption structure 1 without moving a first portion of absorption structure already printed.

[0192] The machine comprises a tray capable of entirely containing the absorption structure 1 or several absorption structures 1.

[0193] The presence of the joints 11 is advantageous because it is possible to define an absorption structure 1 in a substantially flat manner.

[0194] Absorption structure 1 occupies less volume. It is possible to put more parts in the same production bin, which can improve production efficiency and profitability.

[0195] Single-shot printing is also made possible by the presence of the additional contour and joint amounts 25 which are capable of generating the contours and joints 11.

[0196] In particular, the joints 11 are generated by one or more additional uprights 25 extending along a line.

[0197] This one-piece print requires no gluing or stitching to complete the build.

[0198] The manufacturing method comprises a preliminary step E0 consisting of obtaining the geometric parameters and / or the customization parameters from a control interface of the printing machine or from a remote server capable of communicating with the printing machine.

[0199] It is thus possible to define the customizable areas 15 locally or remotely. In particular, the customization parameters can be obtained from a web page comprising a form or configurator to be completed by the user, the server being able to collect the customization parameters entered by the user.

[0200] The customization parameters may correspond to a direct entry of the determined material densities of the polarizable zones among the at least two reference densities. This direct entry may be carried out on the control interface or on a remote interface connected to the remote server. According to one example, the remote interface may be a computer connected to the Internet. The user can thus configure himself the absorption structure that he wishes to control.

[0201] Alternatively, the customization parameters correspond to an indirect entry of the determined material densities, the indirect entry corresponds to a choice of a practice category from a set of practice categories, the method comprising a step of transcribing the chosen practice category into determined material densities.

[0202] A practice category corresponds to a sport, position, and possibly the size and / or weight of a user.

[0203] For example, for a receiver position of a given size and weight, only one type of knee pad will be produced with material densities determined in advance and generally considered suitable for the conditions of use. In this case, the user has less freedom of choice but can obtain a suitable product without having to inquire beforehand about the specific densities to choose. In practice, a configurator can be set up to assist the user in making his choice.

[0204] The geometric parameters correspond to the shape of each three-dimensional pattern s, to the arrangement of the plurality of three-dimensional patterns 3 generating the absorption structure 1 and / or to the location and spatial configuration or contours of the regions corresponding to the customizable zones 15.

[0205] Alternatively, the geometric parameters are predetermined by the manufacturer and cannot be changed at the control interface or remote interface.

[0206] Alternatively, the geometric parameters can, at least some of them, be modified by a user at the command interface or the remote interface.

[0207] In particular, it may be possible to enter parameters relating to at least one of the regions defining the customizable zones 15.

[0208] The definition of a region may correspond to a contour plot on the control interface or the remote interface or to the selection of an alternative for spatial definition of said region from a plurality of alternatives. These alternatives may be recorded by the manufacturer and offered as choices during configuration by the user. As illustrated in FIG. 7, a plot made by a user at the control interface or the remote interface makes it possible to define customizable zones 15 whose plot is different from that of FIG. 1.

[0209] This example is just one possibility among others. The point is to no longer have any constraints regarding the locations of customizable zones 15.

[0210] A user noticing from experience that he wishes to thicken certain areas of his absorption structure 1 can thus determine for himself the contours and densities of the customizable areas 15.

[0211] In Figure 8 is shown a portion of the absorption structure 1 obtained by the manufacturing process seen from the side.

[0212] The absorption structure can be obtained by different types of three-dimensional printing machines, in particular, those capable of producing thermoplastic parts, TPU, TPA, from filaments and / or resins.

[0213] The 3D printing machines used can generate material by polymerization, crosslinking, fusion or any other type of technical alternatives that allow the accumulation of material.

[0214] It thus appears that the use of three-dimensional patterns 3 organized into customizable zones 15 and with at least one articulation makes it possible to constitute body protection 35 adapting both to the body surface 35 to be covered and to the intensity of the protection adapted to the user.

[0215] The absorption structure 1 is thus optimally designed to both facilitate production and present “tailor-made” properties chosen by the user.

[0216] As goes without saying, the invention is not limited to the single embodiment described above as an example; on the contrary, it encompasses all variant embodiments.

Claims

CLAIMS 1. An absorption structure (1) for body protection (35), the absorption structure (1) comprising: a plurality of three-dimensional patterns (3), each three-dimensional pattern (3) being linked to one or more adjacent three-dimensional patterns (3) so as to generate the absorption structure (1) having a low total thickness (5) compared to an extension surface (7) of said absorption structure (1), each three-dimensional pattern (3) comprising a plurality of posts (9) linked to each other, at least two customizable zones (15), each customizable zone (15) comprising three-dimensional patterns (3) defining a corresponding region of the absorption structure (1), the three-dimensional patterns (3) of a customizable zone (15) having a determined material density corresponding to a reference density among at least two reference densities.

2. Absorption structure (1) according to claim 1, wherein each reference density corresponds to a defined diameter or width (17) of uprights (9), the uprights (9) of customizable zones (15) of different reference densities being geometrically organized in the same way.

3. Absorption structure (1) according to one of claims 1 or 2, in which each three-dimensional pattern (3) is linked to one or more adjacent three-dimensional patterns (3) by one or more corresponding links, each link being designed to allow a relative displacement of a defined amplitude of said three-dimensional pattern (3) with respect to the adjacent three-dimensional pattern(s) in at least one direction.

4. Absorption structure (1) according to one of claims 1 to 3, in which the three-dimensional patterns (3) are lattice patterns, the absorption structure (1) comprising additional uprights (25) configured to generate the contours of the absorption structure (1).

5. Absorption structure (1) according to claim 4, in which the three-dimensional patterns (3) are fourteen-sided polyhedra.

6. Absorption structure (1) according to one of claims 1 to 5, in which the total thickness (5) of the absorption structure (1) is two three-dimensional patterns (3) and in which each three-dimensional pattern (3) has a specific thickness (27) at least twice less than a longitudinal dimension (29) and / or a lateral dimension (31) of said three-dimensional pattern (3).

7. Absorption structure (1) according to one of claims 1 to 6, comprising at least one articulation (11) formed between two parts (13) of the absorption structure (1), each part (13) comprising at least two customizable zones (15).

8. Body protection (35) comprising an absorption structure (1) according to one of claims 1 to 7 and a cover (37) designed to receive at least in part the absorption structure (1), said cover (37) being configured to cooperate by form complementarity with the absorption structure (1).

9. Body protection (35) according to claim 8, suitable for use as a knee pad.

10. Method for manufacturing an absorption structure (1) according to one of claims 1 to 7, comprising the following steps: (El) have a three-dimensional printing machine using additive manufacturing, (E2) have geometric parameters of the absorption structure (1) and customization parameters relating to the reference densities of each customizable zone (15), (E3) carry out the printing of the absorption structure (1) by additive manufacturing with the printing machine.

11. Manufacturing method according to claim 10, in which the step (E3) of printing the absorption structure (1) by additive manufacturing is carried out in a single step.

12. Manufacturing method according to one of claims 10 or 11, comprising a prior step (E0) consisting of obtaining the geometric parameters and / or customization parameters from a printing machine control interface or a remote server capable of communicating with the printing machine.

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