EP3471568B1

EP3471568B1 - Back protector

Info

Publication number: EP3471568B1
Application number: EP17748568.7A
Authority: EP
Inventors: Fanny Boria
Original assignee: Dainese SpA
Current assignee: Dainese SpA
Priority date: 2016-06-20
Filing date: 2017-06-13
Publication date: 2020-11-18
Anticipated expiration: 2037-06-13
Also published as: EP3471568A1; ITUA20164525A1; US20190191794A1; WO2017221110A1

Description

The present disclosure relates in general to a protection device, in particular a wearable personal protection device for protecting a user's body against impacts when practising a dynamic sport or similar dynamic activity. More particularly, said device is used to protect the back of a motorcyclist or motorcycle passenger, or a cyclist, or a skier, or a person who is exposed to the risk of impacts when performing a working activity.
A known back protector for motorcycling use comprises a single substantially rigid plate worn in close contact with the user's body so as to protect it in the event of an impact.
Also known are back protectors including a plurality of rigid plate members arranged alongside each other so as to form a protection surface; the plate members are arranged on a substantially non-extendable support base made of soft fabric and having a padding function.
In particular, the present disclosure is based on a recognition by the inventor that the known back protectors, despite including a plurality of plate members connected together, do not allow a satisfactory "mobility" of the back protector in keeping with all the movements performed by a user. In the present state of the art, therefore, there is a need to improve the characteristics of the back protectors designed according to the prior art. EP0212206 discloses the preamble of claim 1.
The starting point of the present disclosure is therefore that of solving the technical problem of providing a back protector for protecting a user's body against impacts, which device is able to satisfy all the aforementioned requirements with reference to the prior art and/or achieve further advantages and characteristic features.
This is obtained by providing a back protector as defined in the independent claim 1. Secondary characteristic features of the aforementioned protection device are defined in the corresponding dependent claims.
The back protector or spine protector according to the present disclosure comprises a body with energy-absorbing function extending along a longitudinal direction and comprising at least one portion able to

provide the body with energy-absorbing function with freedom of movement according to at least six degrees of freedom; and/or
allow a return of the body with energy-absorbing function into an original position following a cessation of any one, or all, of the following stresses or deformations: stretching along said longitudinal direction, a compression, in the

In the continuation of the present description and claims the term "portion" is understood as referring to the presence of a preferably flexible structure which has a high mobility with at least 6 degrees of freedom or which is able to move and then return into an original position, following the aforementioned stresses of elongation, compression, lateral bending on both sides and torsion in both senses of rotation (or combination of said stresses) about a longitudinal substantially central axis which passes along the back protector. In other words, said portion is preferably a portion flexible in terms of structure and/or material and able to undergo a structural and/or material deformation following all of the following stresses: stretching along said longitudinal direction, a compression, in the opposite direction to said stretching, along said longitudinal direction, a torsion in both directions of rotation about an axis passing through said body with energy-absorbing function, said axis being parallel to said longitudinal direction, a bending towards right-hand and left-hand sides of said body with energy-absorbing function about an axis orthogonal to a plane supporting said body with energy-absorbing function and orthogonal to said longitudinal direction, and/or a combination of said stresses.
The main advantage of a back protector thus designed is that the back protector may follow all the movements of the body in all its directions, without hindering its mobility. The presence of one or more of these portions moreover allows complete adhesion to all parts of the user's body precisely because the body movements may be fully followed.
Preferably, in one embodiment of the present disclosure, the body with energy-absorbing function comprises a plurality of plate members adjacent or a side-by-side sequentially in the direction of its length. The aforementioned portion is a uniting or joining portion arranged between one plate member and an adjacent plate member.
The aforementioned portion has a dimension smaller than the dimensional of the plate member in the longitudinal direction and acts as a hinge between the two adjacent plate members. The aforementioned portion has a dimension substantially the same as the dimension of the plate member in a transverse direction, namely in a short side or widthwise direction orthogonal to the longitudinal direction. The short side direction is understood as meaning the direction between the right-hand side and left-hand side of the back protector when the latter is placed on a user's back.
Preferably, the aforementioned portion is a portion made of deformable flexible material, even more preferably with elastic properties which may be derived both from the material and from the configuration.
In one embodiment, the structure of the portion is a lattice structure with narrow and long cavities oriented in a short side direction of the back protector, namely in a direction orthogonal to the longitudinal direction. Preferably, the lattice structure has openings or cavities shaped substantially as a double ogive, namely with two ogives having respective curves or arches directed on opposite sides so as to form a substantially oval or double-ogive cavity.
The structure may be obtained by joining together at least two, more or less curved, sinusoidal or wave-like elongated elements. These elongated elements are arranged or oriented in a short side direction. The elongated elements are made of flexible material.
A back or hump of one of the two elements is joined together with a throat or depression of the other one of the two elements. A lattice with a high mobility is therefore obtained. The hump and throat are obviously directed towards the other one of the two elements. Joining together may be performed as one piece or a spacer may be provided.
Further characteristic features and the modes of use forming the subject of the present disclosure will become clear from the following detailed description of embodiments thereof, provided by way of a non-limiting example.
It is evident, however, that each embodiment forming the subject of the present disclosure may have one or more of the advantages listed above; in any case it is not required that each embodiment should have simultaneously all the advantages listed.
Reference will now be made to the figures in the attached drawings in which:

Figure 1 shows a perspective view of a back protector according to the embodiment Figure 1;
Figure 2 shows a front view of a back protector according to an embodiment of the present disclosure;
Figure 3 shows a front view of a back protector according to an embodiment of the present disclosure, without support belts and straps;
Figure 4 shows a side view of a back protector according to the embodiment of Figure 1, without support belts and straps;
Figure 5 shows a detail, on a larger scale, of the back protector shown in Figure 3;
Figure 6 shows another detail, on a larger scale, of the back protector shown in Figure 3;
Figure 7 shows a further detail, on a larger scale, of the back protector shown in Figure 3;
Figures 8 and 9 show respective details, on a larger scale, of the back protector according to an embodiment of the present disclosure, the figures showing the stresses acting on the back protector;
Figure 10 shows a further side view of a back protector according to the present disclosure, the figure showing a further stress acting on the back protector.

reference number

The back protector 10 according to the present disclosure is designed to be worn by a user. It should be noted that every spatial reference in the present disclosure, including the description and claims, such as right-hand, left-hand, above and below and similar references, for the sake of easier understanding, relate to the back protector in the condition when worn by a user.
Moreover, the back protector 10 follows the anatomy of the user's back and therefore has a greater length and smaller width. In the back protector, therefore, it is possible to define a long side direction or longitudinal direction L and a short side direction which is orthogonal to the longitudinal direction L and extends from the right-hand side to the left-hand side in the back protector, when viewing for example a back protector placed on a surface or resting on a user's back.
In accordance with one aspect of the present disclosure, the back protector 10 comprises a body with energy-absorbing function 12 extending along the longitudinal direction L and comprising at least one portion 14 having preferably elastic properties, and more preferably a plurality of portions 14. Each portion 14 is in the example a uniting or joining portion. The portion has a flexible and preferably elastic form derived from the material from which it is made. What is important is that it should be made, in terms of geometry and structure, such as to ensure an extraordinary mobility for the whole of the back protector. In particular, the portion 14 is able to:

provide the body with energy-absorbing function 12 with a freedom of movement according to at least six degrees of freedom and allow return into an original position following any movement which occurs according to said at least six degrees of freedom; and/or
allow return into an original position following cessation of any one of the following stresses or deformations: stretching along said longitudinal direction, a compression, in the opposite direction to said stretching, along said longitudinal direction, a torsion in both directions of rotation about an axis passing through said body with energy-absorbing function, said axis being parallel to said longitudinal direction, a bending towards right-hand and left-hand sides of said body with energy-absorbing function about an axis perpendicular to a plane supporting said body with energy-absorbing function and orthogonal to said longitudinal direction L, and/or a combination of said stresses or deformations. The portion 14 is also such as not to adversely affect the impact energy absorbing function since this same joining area reacts perfectly to the impact tests owing, for example, to the combined action of its geometry and material.

Basically, in accordance with an aspect of the present disclosure, a back protector 10 which is able to ensure not only an energy-absorbing function but also maximum mobility is provided. The deformations therefore consist of stretching or compression along the long side direction, bending to the right of left with respect to a sagittal plane and a torsion in both directions of rotation about an axis parallel to the long side direction, corresponding substantially to a torsion of the user's back in both directions of rotation.
In one embodiment of the present disclosure, the body with energy-absorbing function 12 includes a plurality of plate members indicated by the reference numbers 16, 18, 20, 22 and 24. Each member 16, 18, 20, 22 and 24 may be made using a specific manufacturing technology for ensuring a suitable level of protection and energy absorption.
The plate members 16, 18, 20, 22 and 24 are elements which are separate from each other and are joined together by means of a respective portion 14. Consequently the back protector 10 is provided with a plurality of separate plate members and a plurality of portions 14. The plate members are joined together in pairs by means of the portion 14. For example, considering a back protector for a motorcyclist, the back bends to one side when the motorcyclist rides around a bend. Because the plate members are structurally independent and separated from an adjacent plate member by means of the elastic portion associated with it, this allows lateral bending movements to be performed on one side and the other in a harmonious manner and without creating discomfort for the user.
The portion 14 is situated on the same level in between two successive or consecutive plate members. Even more particularly it can be seen that, preferably, the portion 14 occupies an entire space situated between two successive or consecutive plate members. In other words, two consecutive plate members 16, 18, 20, 22 and 24 each occupy a given volume or space in a short side direction, or along a transverse extension, orthogonal to said longitudinal direction. The portion 14 extends in the short side direction or transverse direction so as to occupy an intermediate zone defined between the spaces of the consecutive plate members 16, 18, 20, 22 and 24.
The portion 14 acts as a kind of concertina portion between two successive plate members. In other words, the portion 14 has a mobility similar to that of a bellows or pleated element. Similarly, the back protector may perform a torsional movement in both directions of rotation about an axis coinciding with the longitudinal direction L, for example, when a user twists his/her back, turning the chest towards one side or the opposite side.
A further movement consists of a compression/stretching movement, for example when a motorcyclist reaches out forwards on the motorcycle so as to assume a racing (extended) position or when the motorcyclist sits back upright, compressing the plate members against each other.
In other words, a back protector according to the present disclosure is able to follow all of these deformations because the plate members are able to move away from or towards the adjacent plate members and return into an original position owing to the elastic deformation of the elastic portion 14.
Preferably, the elastic portion 14 is made of a carbon-based organic elastomer containing particles of NBR (nitrile butadiene rubber). This consists of the same class of material as that used for the plate members, with a greater percentage composition of carbon.
Preferably each plate is made of a rubber, even more preferably a nitrile rubber, for example polynorborbnene, with a Shore hardness of between 30 and 40 Shore A and an elastic return of between 0 and 10%. It is possible to use other materials such as rubbers, expanded polymers, polymeric honeycomb structures or metals. Even more preferably, the elastic portion 14 and each plate member are made of a material of a similar kind, i.e. a carbon-based organic elastomer, so as to allow the formation of better joints during manufacture.
In one embodiment of the present disclosure, and as shown in the drawings, the portion 14 has a lattice-like configuration. Even more preferably the elastic portion includes a plurality of elongated elements 15 arranged substantially in a sinusoidal or wave-like manner in a short side direction from right to left. The sinusoidal arrangement may have a undulating or also an angular profile. Preferably, the portion 14 includes at least two elongated elements 15 which are connected together at the respective maximum and minimum points of the respective waves so as to form the lattice. The connection points therefore alternate with maximum spacing points in said short side direction. The connection points are therefore staggered with respect to each other.
In other words, the portion 14 includes at least one first elongated element 15 and a second elongated element 15 each having a sinusoidal or wave-like configuration and joined together in mutual joining or connection zones. The connection or joining zones are a maximum or hump zone of the first elongated element and a minimum zone or throat zone of the second element so as to form the lattice portion.
Even more preferably, each portion 14 comprises, between two successive plate members, a first elongated element 15a completely joined and/or glued together with the first of the two successive plate members, a second elongated element 15b with a sinusoidal progression joined together with the first elongated element, a third elongated element 15c with a sinusoidal progression joined together with the second elongated element, and a fourth elongated element 15d fixed and collapsed onto the second of the two successive plate members and joined to the third elongated member 15c.
With regard to the connection - or generally the elastic joint - between an elongated element and the plate member, it is pointed out that joining together may be ensured by means of perfect chemical adhesion achieved by means of plasma bonding, where the polymer surface of the two elements (which have, as mentioned, preferably the same basic composition) is treated so as to provide a perfect chemical bond between the two compounds.
With this technology it is possible to join together surfaces which are perfectly planar with an excellent strength and duration over time, obtaining the result of a single energy-absorbing body without mechanical joints.
As a result the elongated elements define empty or hollow zones which are shaped in the manner of a double ogive and which, in said short side direction, alternate with a connection zone. The connection zone defines in turn two hollow zones arranged above and below the connection zone respectively.
Preferably, the connection between the elongated elements is broader in the central zone of the back protector such that the elongated elements 15 are substantially collapsed onto each other in the central zone of the back protector. This results in a reduction in the opening or aperture of the empty zones of the portion 14.
In other words, the hollow zones have a smaller size or extension than the corresponding hollow zones in the lateral regions of the back protector. This arrangement is consistent with the lateral bending movements to the right and left since, during lateral bending, the perimetral or external zones require a greater expansion. Preferably the portion 14 terminates in a hollow zone along the perimeter, precisely to allow lateral opening of the back protector during lateral bending.
Elongated elements 5 moreover are formed with a sufficient thickness to ensure suitable protection from impacts and energy absorption. For this purpose, the elongated elements 5 have preferably a thickness or height of at least of between 10 and 20 mm, preferably between 12 and 18 mm. The protective capacity offered by each portion 14 is obtained from the structure which, owing to the presence of thin walls aligned perfectly with the thickness of the plate members, collapse under the force of the impact, absorbing the energy thereof. Secondly, the protection capacity is also defined by the material, i.e. the carbon-based organic elastomer. As regards the plate members, it may be commented that they are made using any technology known in the sector for manufacturing back protectors with a protective capacity.
In one embodiment, each plate member is a lattice body having a first side 33 and a second side 34 opposite to the first side 33. The lattice body is for example a layer or sheet with a substantially plate-shaped form made of flexible material. For example, the protection device 10 is produced by means of moulding, so as to obtain easily each lattice body 12.
The lattice body 12 has a plurality of cells 15 or tubular bodies arranged alongside each other so that the side walls of one tubular body are common to the side walls of adjacent tubular bodies or cells 15.
In the example of embodiment shown in the figures, the cells have a polygonal form, such as a hexagonal form.
Even more particularly, in the embodiment shown in the figures, the cells 15 have through-cavities 16 which extend between the first side 33 and the second side 34 of the lattice body. The through-cavities 36 of the cells 35 define a mesh opening of the lattice.
According to one aspect of the present disclosure, in order to vary a configuration of back protector and the plate member, it is envisaged subdividing each cell 35 into increasingly smaller sub-portions or segments so as to obtain a lattice having a smaller mesh opening of the lattice, and preferably in the specific case, a greater rigidity of the protection device.
The reduction in size of the lattice mesh opening may be achieved by providing crosspieces 37 or bridge-like connectors which connect zones of the side walls of a same single cell 35. In the embodiment shown, the crosspieces 37 connect vertices of the polygon, such as the aforementioned hexagon, which results in the internal geometric subdivision thereof into geometric forms such as a rhombus and triangle.
Even more particularly, starting with a cell 15 without any crosspieces, such as that visible on the right in these figures, it is possible to provide a first bent stiffening crosspiece 37 which connects two vertices of the hexagon separated by an intermediate vertex of the hexagon. in order to obtain a greater rigidity, it is possible to provide a further stiffening crosspiece 37 which connects the first stiffening crosspiece 37 to another vertex of the hexagon which is adjacent and consecutive to one of the two aforementioned vertices so as form a crosspiece 17 which is substantially Y-shaped. In order to obtain an even greater rigidity, it is possible to provide a further stiffening crosspiece which connects the Y-shaped stiffening crosspiece to another vertex of the hexagon which is adjacent and consecutive to the other of the two aforementioned vertices so as to form a crosspiece 37 substantially in the form of an X, leaving free only two opposite vertices of the hexagon. In order to obtain a maximum rigidity, it is possible to envisage a further stiffening crosspiece which passes through the X in the central zone and connects the two vertices of the hexagon left free so as to form a star-like stiffening member inside the cell 35. In particular, the subdivision of the geometry of the basic cell results in a varied segmentation of the hexagon so as to produce rhombuses and triangles which are in all cases inscribed within the hexagonal basic cell.
It is pointed out that preferably the walls of the cells and the crosspieces which form the lattice are always arranged perpendicularly with respect to the normal of the surface, this constructional methodology ensuring a maximum performance in terms of impact energy absorption in any direction of origin of the external force, owing to the perpendicularity of the walls which produce the impact absorption effect.
It may be stated that each plate member has central zones of the lattice with a smaller lattice mesh opening and/or a greater rigidity in the central region. Therefore, the back protector is designed so as to have a subdivision of the cells 15 gradually increasing from a peripheral zone towards a central zone of the back protector.
It is to be understood that the plate body may not be formed solely by the hexagonal shaped cells 15 and that these cells represent only some of the cells which form the lattice body. It is pointed out in this respect that, in the embodiment shown in the drawings, the general optical effect is always based on a hexagonal shaped cell, but in reality on some occasions one side of the hexagon wall is open so as to obtain a more linear and homogeneous increase in the actual rigidity, with a corresponding effect also in visual terms.
With this arrangement of parts a back protector with a high degree of flexibility in terms of performance is obtained, with satisfactory breathability and lightness owing to the through-cavities 16, satisfactory protective capacity owing to the presence of the cells 35 and the respective stiffening crosspieces 17, and satisfactory flexibility and mobility owing to cells which do not have crosspieces or have fewer of them towards the outermost areas.
The subject-matter of the present disclosure has been described hitherto with reference to preferred embodiments thereof. It is to be understood that other embodiments relating to the same inventive idea may exist, all of these falling within the scope of protection of the claims which are illustrated hereinbelow.

Claims

Back protector (10) comprising a body with energy-absorbing function (12) extending along a longitudinal direction (L) and comprising a plurality of portions (14),
wherein each portion (14) is
- a structure having mobility with at least six degrees of freedom and able to provide the body with energy-absorbing function (12) with freedom of movement according to at least six degrees of freedom; and/or

- a structure able to move and return into an original position, following the following stresses:
stretching along said longitudinal direction,

a compression, in the opposite direction to said stretching along said longitudinal direction,

a torsion in both directions of rotation about an axis passing through said body with energy-absorbing function, said axis being parallel to said longitudinal direction,

a bending towards right-hand and left-hand sides of said body with energy-absorbing function about an axis orthogonal to a plane supporting said body with energy-absorbing function (12) and orthogonal to said longitudinal direction (L), and/or

a combination of said stresses, and allowing the body with energy-absorbing function (12) to return into an original position following cessation of any one, or all, of said stresses, and

wherein the body with energy-absorbing function includes a plurality of plate members (16, 18, 20, 22 and 24) separate from each other, wherein one portion of said portions (14) is arranged between two successive plate members (16, 18, 20, 22 and 24) or adjacent plate members (16, 18, 20, 22 and 24), characterized in that said portion (14) has an energy-absorbing function and is lattice-like portion (14) which is flexible and/or has elastic properties in terms of structure and/or material,
wherein said portion (14) includes one or more elongated elements (15) each element having a sinusoidal or wave-like configuration and being arranged or oriented in a transverse direction, or short side direction, with respect to said longitudinal direction, and
wherein said sinusoidal or wave-like configuration defines a hump zone or maximum zone and a throat zone or minimum zone which alternate along said transverse or short side direction.
Back protector (10) according to claim 1, wherein each portion (14) is a portion flexible in terms of structure and/or material and able to undergo a structural and/or material deformation following said stresses.
Back protector (10) according to claim 1 or 2, wherein each of said plate members (16, 18, 20, 22 and 24) has a flexibility less than that of said portion (14).
Back protector (10) according to claim 3, wherein each plate member is made of a rubber, preferably nitrile rubber.
Back protector (10) according to any one of the preceding claims, wherein the portion (14) is made of carbon-based organic elastomer.
Back protector (10) according to claim 5, wherein each of said portions (14) is made of the same material as the respective plate member, such as carbon-based organic elastomer, so as to allow better joining together during manufacture.
Back protector (10) according to any one of the preceding claims, wherein each elongated element (15) is fixed to a respective plate member in the region of a hump zone or a throat zone.
Back protector (10) according to any one of the preceding claims, wherein each of said portions (14) includes at least one first elongated element (15) and one second elongated element (15) each having a sinusoidal or wave-like configuration and joined together in mutual joining or connection zones, wherein said joining or connection zones are a maximum or hump zone of the first elongated element and a minimum zone or throat zone of the second element so as to form the lattice-like portion.
Back protector (10) according to any one of the preceding claims, wherein said lattice-like portion includes long and narrow cavities, or openings or cavities shaped substantially as a double ogive and being oriented in a short side direction of the back protector, namely in a direction orthogonal or transverse to the longitudinal direction (L).
Back protector (10) according to any one of the preceding claims, wherein each portion (14) comprises a first elongated element (15a) completely joined and/or glued to a first of the two successive plate members (16, 18, 20, 22, 24), a second elongated element (15b) with sinusoidal progression joined to the first elongated element (15a), a third elongated element (15c) with sinusoidal progression joined to the second elongated element (15b), and a fourth elongated element (15d) fixed and collapsed on the other one of the two successive plate members (16, 18, 20, 22, 24) and joined to the third elongated (15c).
Back protector (10) according to any one of the preceding claims, wherein one of said portions (14) has a lattice opening smaller in a central zone than in a peripheral zone.
Back protector (10) according to any one of the preceding claims, wherein one of said portions (14) is open on the right-hand and left-hand sides of the body with energy-absorbing function.
Back protector according to any one of the preceding claims, wherein each plate member is a lattice body comprising a plurality of cells (35) or units which are internally hollow or have a cavity which is repeated in said lattice body, wherein said lattice body has at least a first zone in which one or more cells (35) define(s) a first mesh opening of the lattice and a second zone in which one or more cells (35) is/are partially occupied by means of stiffening, connection and/or filling elements and/or has a second mesh or opening or aperture smaller than the first mesh opening.
Back protector (10) according to claim 13, wherein said cell (35) is a tubular body, a sleeve body, a ring body or similar closed and hollow body of predefined cross-section, which is repeated in the lattice body in terms of its shape so as to define the lattice.
Back protector (10) according to claim 13 or claim 14, wherein said stiffening, connecting and/or filling elements include crosspieces, bridge elements, transverse walls or similar stiffening elements which connect in bridge fashion two parts or zones of a side wall which defines the cell (35).
Back protector according to any one of the preceding claims, wherein one of said portions (14) occupies an entire space situated between two successive plate members (16, 18, 20, 22 and 24).
Back protector according to any one of the preceding claims 1 to 15, wherein two adjacent plate members (16, 18, 20, 22 and 24) each occupy a predefined volume or space in a short side direction, or along a transverse extension, orthogonal to said longitudinal direction, and one of said portions (14) extends in the short side direction or transverse direction so as to occupy an intermediate zone defined between said spaces of the adjacent plate members (16, 18, 20, 22 and 24).