Patent Application
20220095712
The present disclosure relates to a protective structure for protective garments and equipment, comprising a first surface, a second surface, a curved mesh structure having a multitude of holes extending from the first surface to the second surface, and a border frame surrounding the mesh structure at least partly, and the protective structure is configured to be positioned in a garments in a such way that the second surface is towards the user of the garment, and the material of the protective structure is rigid.
Many sporting and safety garments and equipment feature protective structures. Protective structures are present, for example, in ice hockey leg shields, breast and shoulder shields and in pants and safety garments that protect users from falls and high impacts. The protective structures are fairly stiff structures that are usually made of a plastic material, the purpose of the protective structures being receiving shocks and distributing the energy of the shock over a wider area.
Protective structures for protective garments and equipment have traditionally been made from sheet-like material by die-cutting and forming the die-cut piece by to a desired shape by subjecting it to heat. Also, the sheet-like material is bent during die-cutting in order to improve the stiffness of the piece. Also, openings have been made in the piece during die-cutting in order to lighten the piece. Plastic has normally been the material of choice. Such protective structures have been used in the outer surface of sporting equipment, for example with ice hockey leg shields or inside the sporting equipment, wedged between softer protective structures such as foamed plastics. The purpose of the protective structure is to receive shocks and impacts from the outside and to distribute their energy over a wider area. The protective structure and its material should be substantially rigid for maintaining the shape of the protective structure. However, the protective structure should bend when receiving impacts for distributing energy over a wider area.
A protective structure made of sheet-like material by die-cutting becomes fairly heavy. The thickness of the material is the same throughout the whole piece and the ability of the piece to distribute shocks effectively over a wider area remains rather limited. The described protective structure also traps heat and prevents air from circulating under the protective structure, causing discomfort and fatigue.
The following publications address some of these problems.
Patent publication FI103862 shows a protective pad for a garment equipped with separate protective pads that are inserted into pockets. Each protective pad is composed of a flexible cellular protective pad material, which retains its shape and comprises interconnected walls which extend from an outer surface to an inner surface of the protective pad, the walls having a width in the direction of the surface of the pad which is smaller than the height of the wall in the thickness direction of the protective pad. The walls form cells with a closed periphery such that between the walls of the cells there remain holes extending through the pad. The pad is made from a sheet-like cellular material by cutting the material into a shape having the appropriate contour. The width of the walls increases from the outer surface towards the inner surface of the pad. The pad can be manufactured, for example, by injection moulding or by producing a cellular sheet, where cells needed for the pad are on a big sheet. The heights of the walls, namely the thickness of the pad, are the same on the whole area of the pad.
Patent publication F1124192 shows a protective structure comprising, at least in one direction, a curved support rib structure of a material that is suited for injection moulding. The thickness of the support rib structure varies in a direction perpendicular to a surface formed by the support rib structure so that the thickness is greater at the middle of the support rib structure as compared to the material thickness at the edges of the support rib structure. This kind of structure improves impact energy distribution and makes the whole structure lighter.
However, there is a clear need for improving protective structures for protective garments and equipment. It would be especially beneficial if the weight could be reduced and air circulation in the protective structure could be improved. If these goals can be achieved, there can also be other uses for the protective structures, in addition to sporting equipment.
An object of the present disclosure is a solution that can significantly reduce the disadvantages and drawbacks of the prior art. In particular, an object of the present disclosure is a solution where a light protective structure with improved air circulation properties is provided.
The present disclosure is a protective structure for protective garments and equipment. The protective structure is a flat curved plate like object that comprises a mesh structure having a multitude of holes. The holes in the mesh structure or the parts of the holes in the mesh structure have rim structures extending towards the user when the protective structure is in use and between the rim structures are channels. The channels improve air circulation beneath the protective structure and the rim structures and enhances impact-spreading and the elasticity of the protective structure. A continuous border frame surrounds the mesh structure. The protective structure has a first surface and a second surface, and the second surface is oriented towards the user of the protective structure when the protective structure is in use.
If it is mentioned that some part of the protective structure is higher than some other part of the protective structure, then a situation where the protective structure is laying on a surface with the first surface down is described. Also, when some direction or surface or part is referred to by ‘outer’, it is meant that it is away from the user when the protective structure is in use.
In one embodiment of the present disclosure, a protective structure for protective garments and equipment is provided, the one embodiment comprising a first surface, a second surface, a curved mesh structure having a multitude of holes extending from the first surface to the second surface, and a border frame surrounding the mesh structure at least partly, and the protective structure is configured to be positioned in garments or equipment in a such way that the second surface is oriented towards the user of the garments or equipment, and the material of the protective structure is rigid. The term rigid means here that the protective structure maintains its form in a normal use. Impacts may bend the protective structure. In one advantageous embodiment of the invention, the edges of the holes in the mesh structure have rim structures extending towards the second surface from the mesh structure and the rim structure has a top side, an inner side and an outer side, and between the rim structures are channels formed by the sides of the rim structures and the mesh structure, and the top sides of the rim structures form at least part of the second surface, and the heights of the rim structures are greater at the middle of the mesh structure as compared to the heights of the rim structures at the edge of the mesh structure.
In one embodiment of the protective structure, the rim structures are separate from each other. This feature allows the channels to be continuous and the elasticity of the protective structure is enhanced and its impact-distribution properties are improved.
In a second embodiment of the protective structure, the rim structures are continuous at holes which do not touch the border frame. This means that the rim structures surround the holes that are not delimited by the edge of the mesh structure. This feature guides the air circulation and improves the impact durability of the protective structure.
In a third embodiment of the protective structure, the thickness of the border frame is less than the distance between the first surface and the second surface at the edge of the mesh structure. This feature provides an arrangement that can be used for fixing the protective structure to garments or fixing some material to the protective structure. Also, this diminishes the weight of the protective structure.
In a fourth embodiment of the protective structure, at least one of the curvature radiuses of the second surface is greater than the corresponding curvature radius of the first surface.
In a fifth embodiment of the protective structure, the holes are circular or elliptical or at least partly circular or elliptical. The holes are partly circular or elliptical where the border frame limits them. Circular shapes are found to be durable, and they spread the impact forces efficiently.
In a sixth embodiment of the protective structure, the centre points of three adjacent holes form an equilateral triangle of a triangle, the sides of which differ from each other in length by 20% at most. This kind of placement of the holes yields a durable and light mesh structure.
In a seventh embodiment of the protective structure, there is a ventilation hole opening between three adjacent holes to the channels between the rim structures. This hole ventilates the channel between the rim structures. Also, it has been found that they further lessen the stress forces. Furthermore, they reduce the total mass of the protective structure.
In an eight embodiment of the protective structure, the border frame is configured in such a way that at least a cushioning and a supporting fabric layer can be fixed to the border frame. In a ninth embodiment of the protective structure, the cushioning and the supporting fabric layer are configured to be fixed to the border frame in such a way that the middle parts of the cushioning and the supporting fabric layer are separate from the second surface.
In a tenth embodiment of the protective structure, at least some of the holes have a collar structure on the inner side of the rim structure, and the upper side of the collar structure is on the same level as the first surface.
In an eleventh embodiment of the protective structure, at least some of the holes have a collar structure on the inner side of the rim structure, and the upper side of the collar structure is on the same level as the second surface.
In a twelfth embodiment of the protective structure, the mesh structure and the border frame are of a material or material composition that is suited for injection moulding.
In a thirteenth embodiment of the protective structure, the mesh structure and the border frame are coated with a material containing metallic particles.
In a fourteenth embodiment of the protective structure, the metallic part is made of metallic material having a microstructure which is fine-grained with an average grain size between 2 and 5,000 nm. This feature improves the impact resistance of the protective structure.
In a fifteenth embodiment of the protective structure, the open surface area of the mesh structure, for example a total area of the holes, is at least 60% of the total area of the mesh structure in its entirety. This makes the protective structure light and at the same time durable.
In a sixteenth embodiment of the protective structure, the diameters of the holes are between 2 and 7 cm. Bigger holes do not provide any more protection from direct hits and using smaller holes increases the mass of the protective structure and impairs air circulation.
It is an advantage of the present disclosure that it provides a protective structure that is light and has efficient air circulation.
Using the protective structure significantly improves impact-spreading and thus diminishes the probability of injuries. It also makes for a product that has no complex parts, so that it is easier to manufacture and maintain than devices according to known techniques.
One advantage of the present disclosure is that it is quite durable and retains its form but is still elastic when receiving impacts. The protective structure can also be easily and quickly integrated in different kinds of garments and equipment.
It is a further advantage of the present disclosure that additional devices, such as sensors, can be easily integrated in the protective structure. Also, the present disclosure makes it possible, due its lightness and efficient air circulation, to use the protective structure for example in safety garments for elderly people.
Further advantages features and details of the various embodiments of this disclosure will become apparatus from the ensuing description of a preferred exemplary embodiment or embodiments and further with the aid of the drawings. The features and combinations of features recited below in the description, as well as the features and feature combination shown after that in the drawing description or in the drawings alone, may be used not only in the particular combination recited but also in other combinations on their own without departing from the scope of the disclosure.
In the following, the invention is described in detail. The description refers to the accompanying drawings, in which
As used throughout the present disclosure, unless specifically stated otherwise, the term “or” encompasses all possible combinations, except where infeasible. For example, the expression “A or B” shall mean A alone, B alone, or A and B together. If it is stated that a component includes “A, B, or C”, then, unless specifically stated otherwise or infeasible, the component may include A, or B, or C, or A and B, or A and C, or B and C, or A and B and C. Expressions such as “at least one of” do not necessarily modify an entirety of the following list and do not necessarily modify each member of the list, such that “at least one of “A, B, and C” should be understood as including only one of A, only one of B, only one of C, or any combination of A, B, and C.
The embodiments in the following description are given as examples only and someone skilled in the art can carry out the basic idea of the invention also in some other way than what is described in the description. Though the description may refer to a certain embodiment or embodiments in several places, this does not mean that the reference would be directed towards only one described embodiment or that the described characteristic would be usable only in one described embodiment. The individual characteristics of two or more embodiments may be combined and new embodiments of the invention may thus be provided.
The protective structure 100 comprises a mesh structure 105 and a border frame 106. The mesh structure has a multitude of holes 107 extending from the first surface 101 to the second surface 102. Between the holes are rib structures which function as a frame for the mesh structure. The border frame surrounds the mesh structure at least partly. In this embodiment the border frame is a flat shelf. The border frame serves to support the mesh structure and in some embodiments, it also serves as a platform for fixing the protective structure to a garment or equipment. Also, in some embodiments the border frame can be used for attaching cushioning to the second surface. Some supporting fabric layers can be fixed to the border frame, too. The holes on the mesh structure have some kind of geometrical shape. In this embodiment, holes are circular or elliptical or partly circular or elliptical. Of course, in some embodiments t hey can be rectangular or take some other form. It must be noted that shapes of the holes can vary in different parts of the mesh structure. The border frame delimits the mesh structure in such a way that some of the holes 107a are whole and some holes 107b are incomplete, namely, they are truncated. In some embodiments the thickness of the border frame is less than the distance between the first surface and the second surface at the edge of the mesh structure.
The edges of the holes 107 on the mesh structure 105 have rim structures 109 extending towards the second surface 102 from the mesh structure, namely, the rim structures are oriented towards the user when the protective structure 100 is in use. The rim structure is a wall-like construct and has a top side, an inner side and an outer side. Between the rim structures are channels which can be used, for example, for guiding air currents in the horizontal direction in relation to the protective structure, namely, inside the protective structure. The channels are formed by the sides of the rim structures and the mesh structure, and, more particularly, the outer sides of the rim structures and the lower surfaces of the rib structures (namely a surface of the rib structure that is towards the second surface). The channels are open to the second surface 102. The height of the rim structure is the distance from the first surface 101 to the top side of the rim structure, namely, the height is measured in the hole. The inner side is towards the hole that the rim structure is surrounding. The top sides of the rim structures form at least part of the second surface, namely, the thickness of the mesh structure is the vertical distance from the first surface to the top side of the rim structure. The heights of the rim structures are greater at the middle of the mesh structure compared to the heights of the rim structures at the edge of the mesh structure. This means that the thickness of the mesh structure is greater at the middle of the mesh structure compared to the thickness of the mesh structure at the edge of the mesh structure. The first surface and the second surface have curvature radiuses. In some embodiments one of the curvature radiuses of the second surface is greater than the corresponding curvature radiuses of the first surface. The term ‘corresponding’ means here that they are on top of each other and have the same direction.
In some embodiments the rim structures 109 are separate from each other. The mesh structure frame (rib structure) between the holes 107 can be interpreted as a beam having a U-shaped groove. The walls of the groove are rim structures of the two adjacent holes and the bottom of the groove is the rib structure between the two same adjacent holes. These grooves form the channel network in the protective structure. Preferably the protective structure is configured in such a way that there is free space inside the channels when the protective structure is in use.
The rim structures 109 are continuous at holes 107a that do not touch the border frame 106, namely, the rim structure completely surrounds the hole. The holes that are delimited by the border frame may have rim structures that end at the point where the edge of the hole meets the border frame.
When the protective structure 100 is manufactured by injection moulding, the usage of raw material can be minimized compared to a protective structure manufactured by die-cutting. There is always a rather big wastage when pieces of a desired size and form are die-cut from a uniform sheet with die-cut techniques. Injection moulding makes it is also possible to optimize the thickness of the mesh structure 105 so that sufficient stiffness and strength are achieved with a minimum of material. Injection moulding makes elaborate designs possible and thus shape whole protective structure in the desired way. The mesh structure can thus be as aesthetically pleasing as desired. Suitable materials for injection moulding are all plastic materials as well as plastic materials that are reinforced, for example carbon fibre. The material must naturally be of such a variety that it achieves sufficient hardness after curing. The protective structure can be manufactured from such a plastic grade or such a composite of a plastic and a reinforcing material that are best suited for each application. For enhancing the hardness of the protective structure, the mesh structure and the border frame can be coated with a material containing metallic particles. This prevents cracks and fracture formation. Thus, lighter and softer materials can be used. The best results are achieved when the metallic particles are metallic material having a microstructure which is fine-grained with an average grain size between 2 and 5,000 nm. The coating improves the properties of the protective structure, allowing it to be made lighter.
It must be noted that the protective structure 100 can be non-symmetrical. For example, the width of the protective structure can be greater near the first end 103 than near the second end 104.
In the embodiment described in the
In some embodiments there is a ventilation hole 108 between three adjacent hole openings to the channels between the rim structures 109. There can be other embodiments in which the ventilation holes are positioned differently in case the holes are placed in some other formation. For example, the centres of the holes may form an equidistant grid and the ventilation holes may be at the middle points of the squares formed by four adjacent holes. There can be ventilation holes in other places as well. For example, in the embodiment of the
The mesh structure 105 forms a cell-like structure having a large open surface. The large open surface contributes to making the protective structure 100 lightweight. In some embodiments the rib structures can be dimensioned so that the width of the rib structures in the direction of the surface of the support structure is smaller than the height of the rim structure 109. By varying the height of the rim structures, it is possible to regulate the stiffness and rigidity of the protective structure in the direction perpendicular to the surface of the protective structure. On the other hand, the rib structure can be kept narrow in the direction of the surface of the protective structure in order to achieve a large open area. Also, a large open area makes the air permeability of the protective structure especially high. In some embodiments the open surface area of the mesh structure is at least 60% of the total area of the mesh structure. The open area comprises both the holes 107 and the ventilation holes 108. Of course, the open area may be even larger, but this is the smallest limit, and below that the protective structure 100 becomes heavy and sweaty in use.
The protective structure 100 can thus on the other hand be made light, but still stiff and rigid enough. The stiffness of the protective structure can be regulated also by changing the size of the mesh structure 105.
The amount of material used in the mesh structure 105 can be optimized in relation to the stiffness by varying the thickness of the mesh structure in a direction perpendicular to the first surface 101 formed by the mesh structure so that the material thickness is greater at the middle of the mesh structure compared to the thickness at the edges of the mesh structure. More material can be concentrated in those parts of the mesh structure where the benefit in relation to the stiffness is the greatest. By concentrating more material in the middle of the mesh structure the middle part of the mesh structure will become stiffer and the edges more flexible. In consequence, the middle part of the mesh structure can withstand impacts and transfer impact energy to the edges of the protective structure 100 more efficiently. The more flexible edge parts of the protective structure also contribute to the suitability of the protective structure in some equipment, and improving user comfort. The rim structures 109 can be applied for improving the aforementioned.
In some embodiments the diameters of the holes 107a positioned wholly in the mesh structure are between 2 and 7 cm, namely, they constitute the holes that are not delimited by the border frame 106. If the diameters are larger, namely, the holes are bigger, the projectiles may penetrate the protective structure 100. These impacts may be, for example, strikes by hockey pucks.
Between the rim structures 509 are channels 510. The channels forms passages that are delimited by the rim structures (the outer walls of the rim structures), the surfaces of the rib structures which are towards the second surface and the second surface 502 (i.e. the plane between the top sides of the adjacent rim structures). At the edges of the mesh structure 505, the border frame 506 delimits the channel network. In some embodiments there may be some openings or grooves in the border frame that connect outer areas to the channels when the protective structure 500 is in use. There are ventilation holes 508 on the rib structures connecting the channel to the first surface 501. In this example the ventilation holes are situated between three adjacent holes 507 the centre points of which form a triangle. The ventilation holes serve to enhance air circulation. Also, they further decrease the total weight of the protective structure 500. Furthermore, careful positioning and shaping the ventilation holes allows for guiding and spreading the stress and impact forces of a strike on the protective structure. Also, the ventilation holes improve elasticity of the protective structure and prevent shearing forces on the rib structures.
The mesh structure 905 effectively transfers the energy of an impact to the mesh structure from the firm crossing points of the mesh structure parts into every direction of the protective structure. The mesh structure can also be designed so that some projectile hitting the mesh structure transfers impact energy through the mesh structure into a cushioning layer 912 underneath the mesh structure. The cushioning could be for example a plastic foam structure or some such. The mesh structure and especially the rim structures will thus penetrate a certain distance into the cushioning whereas the energy of the impact is absorbed into the cushioning.
Some advantageous embodiments of the device according to the invention have been described above. The invention is however not limited to the embodiments described above, but the inventive idea can be applied in numerous ways within the scope of the claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 20197015 | Feb 2019 | FI | national |
This application is a national phase application of International Application No.: PCT/FI2020/000002, filed Jan. 27, 2020, and further claims priority to Finnish Patent Application 20197015, filed Feb. 1, 2019, the contents of both of which are incorporated herein by reference.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/FI2020/000002 | 1/27/2020 | WO | 00 |
