ES2978506T3 - Movable front shield - Google Patents

Abstract

The present invention relates to a front protector (3) for a ballistic protective helmet (2), which is designed to move with the visor when the visor (4) of the protective helmet is opened and closed. (Automatic translation with Google Translate, without legal value)

Description

DESCRIPTION

Movable front shield

1. Field of technology

The present invention relates to a movable front shield for a ballistic protective helmet.

2. State of the art

Ballistic helmets have been known for some time in the art for protecting the head of the wearer. They serve to protect against direct force, such as gunshot wounds, or indirect force, such as shrapnel hitting the wearer's head, and also against sharp and piercing weapons. This type of helmet is typically worn by special forces, and increasingly also by patrol officers who arrive first at the scene (so-called "first responders"), in order to protect the wearer.

The protective effect of such a helmet is achieved by stopping an impacting projectile (or fragment) and thus preventing it from penetrating the helmet to the wearer's head. In particular, the kinetic energy of the impacting parts must be minimized in order to protect the wearer from fatal consequences. Typical materials from which the helmet shell of a ballistic protective helmet is manufactured include titanium, aramid or polyethylene.

To further protect the user's face, and in particular the eyes, it is possible to equip the helmet with a vision visor that can be configured either permanently in front of the face or so that it can be raised and lowered.

In order to protect the anatomically sensitive area of the user's forehead in a frontal confrontation, for example in the event of a frontal shot, but also in the event of an attack with sharp, piercing or blunt weapons, ballistic protective helmets can be supplemented with a shield or a frontal shield, thus creating an additional, reinforced protection zone in the area of the user's forehead. It has indeed been proven that attacks from the front against police officers and intervention forces occur very frequently.

Typically, the front shield is attached to the helmet shell by means of a Velcro patch, see for example EP 3 520 641 A1. This type of attachment allows the shield to be detachably attached to the helmet shell in order to complement, depending on the situation, the protective effect of the ballistic helmet (possibly in combination with a visor). The circumstances of the situation include, for example, an expected shot from a long weapon or other frontal actions that the shield wearer can deal with more directly. If the danger situation is classified as minor, the shield can be removed to reduce the weight of the helmet and thus increase comfort for the wearer.

However, the use of an additional shield generally leads to disadvantages if the helmet is used with a front shield and visor in conjunction. Due to the spatial extension of the front shield, it is no longer possible to open a conventional visor (e.g. by lifting it up), as the spatial extension of the front shield prevents this. This problem can be overcome by designing the visor so that it can slide over the front shield. Due to the dead weight of the visor and the now extended lever arm, the turning moment acting on the helmet increases, which reduces wearing comfort.

Document ITUB20160865 also discloses a front shield for a ballistic protective helmet.

3. Summary of the invention

The invention is therefore based on the objective of improving the configuration of front shields known in the state of the art, so that they can also be used in combination with a visor, without the drawbacks known in the state of the art relating to ease of use and without harming or endangering, due to the method of assembly, the safety of police officers or intervention forces.

This objective is achieved by a front shield for a ballistic protective helmet, which is designed to move together with the visor when a visor of the protective helmet is opened and closed. According to the invention, the front shield is attached to the helmet in such a way that a visor can be moved together with the front shield. For this purpose, the front shield can be attached to the helmet in a basically movable manner. This offers the advantage that a conventional visor can be used, which thus offers the familiar wearing comfort. A visor that slides over the front shield is not necessary. In addition, a complex conversion of the helmet is no longer necessary depending on the situation, since the desired functionality of opening and closing the visor (or raising and lowering it respectively) is also possible when used in conjunction with the front shield.

The present disclosure describes several alternative possibilities of how the front shield can be slidably attached to a protective helmet. The term "slidable" does not exclude the possibility that the front shield or a part thereof also performs a rotation in addition to a movement relative to the surface of a helmet shell when the front shield or a part thereof is moved across a visor of the protective helmet. For example, the front shield or a part thereof can be lifted off the helmet surface at the lower edge while the visor is moved upwards, i.e. out of the field of view. Thus, a rotation then occurs in addition to the sliding movement. However, this is not excluded by the term "slidable".

Basically, the front shield has a device for detachable and sliding attachment of the front shield to the protective helmet. This gives the wearer of the protective helmet the possibility of adapting to the respective conditions of use depending on their situation and, in case of increased risk, being able to rely on additional ballistic protection, which can be provided by the front shield. A detachable front shield also offers the possibility of supplementing or retrofitting existing helmets with a front shield. Velcro patches, for example, are preferred as attachment options.

A possible design of the above-mentioned device consists of a frame which has means for pressing the front shield against an outer surface of a helmet shell of the protective helmet. The frame can be designed to accommodate a ballistic part of the front shield. This is understood to be the part of the front shield which, for example in the event of a shot or an attack with sharp and piercing weapons, provides the actual protective effect and which can be made of a material with sufficient strength, for example titanium or a composite material with fibres. In principle, in the context of the present invention, the front shield is understood to mean, depending on the context, not only this ballistic part itself, but also other means, devices and elements which serve, for example, to fasten the ballistic part to a protective helmet or to attach it to a visor. The purpose of the frame is to fasten the front shield to the helmet in a movable manner, but at the same time sufficiently firm and stable. The frame can, for example, be a sleeve designed to accommodate the ballistic part of the front shield and slide along the surface of the helmet shell. Alternatively, it may be a flange surrounding at least part of the edge of the ballistic part.

Furthermore, since the ballistic part of the front shield is mounted in a frame, no mechanical processing of the ballistic part is necessary, which could negatively affect the protective effect of the front shield. Indeed, mechanical processing of the ballistic part of the front shield, such as drilled holes, in principle reduces its protective effect.

The frame also has means for pressing the front shield against an outer surface of a helmet shell of the protective helmet. On the one hand, the front shield is thus held sufficiently firmly to the helmet shell. On the other hand, it is ensured that at least a part of the front shield can be sufficiently lifted off the helmet shell when the visor is opened. Such lifting can occur because the front shield is attached to a visor and, when opened, this forms an increasing distance from the helmet shell due to its non-spherical shape and/or an eccentric arrangement of the visor supports. The means or means for pressing the front shield correspondingly compensate for this lifting movement caused by the visor.

The frame is designed to be detachably attached to a helmet shell. This means that the frame can be attached to the helmet if necessary and the helmet can therefore be worn with a front shield.

The frame is configured so that it can be attached to and removed from a visor. The frame can be configured so that it can be fastened to the helmet shell and/or the visor. The fastening option is preferably implemented by means of a Velcro patch.

The means for pressing the front shield against an outer face of a helmet shell of the protective helmet may be at least one tensioning element which is configured to be fastened to at least one visor support of the protective helmet. The tensioning element may be elastic, for example in the form of a rubber band, and may have at least one end a loop which is designed to be coupled to a visor support of a helmet shell.

The tensioning element can be attached to the frame in a detachable manner. For example, the tensioning element can be attached to the frame by means of a Velcro patch. In this way, the tensioning element can be separated from the frame and the frame can be attached to the protective helmet without a tensioning element, for example by means of a corresponding counterpart to the Velcro patch. The front shield is thus fixed to the protective helmet and cannot move. This may be desirable, for example, when the protective helmet is worn without a visor.

The tensioning element may be fixed closer to a side of the frame facing away from a visor of the protective helmet than to a side of the frame facing the visor. This arrangement allows the lifting or rotating movement already mentioned when the frame is displaced by a visor of the protective helmet: due to the non-spherical shape of the protective helmet and/or an eccentric position of the visor supports, a lifting or rotating movement of the frame occurs at the lower edge of the frame, on which the visor rests. It can thus be considered that the tensioning element is attached further away from the lower edge of the frame than from its upper edge.

The frame can be made of at least one fireproof material. In this way, the burning of the frame and/or the tensioning element in the event of a shot can be prevented or at least delayed, so that the front shield is held securely in position even if another shot occurs later.

In principle, the front shield according to the invention can have more than one tensioning element, for example two tensioning elements, which are arranged on opposite sides of the front shield or its ballistic part.

As already explained above, the authors of the invention propose several alternative solutions for a movable attachment of the front shield according to the invention to a helmet shell. According to another alternative, the device for detachably and slidably coupling the front shield to the protective helmet consists of at least one rail which is configured to be attached to the protective helmet and to slidably retain a part of the front shield. The rail can be glued to the surface of the helmet, for example, or fastened thereto by means of a Velcro patch. The other part of the front shield, in particular the ballistic part, is then slidably retained on the protective helmet by the rail and - similarly to the frame mechanism already described above - is displaced by a visor of the protective helmet when it is opened and closed.

The movable part of the front shield may have a sliding element configured to slide in the rail, which preferably has a T-slot. The sliding element may be arranged closer to a side of the ballistic part of the front shield facing away from the visor than to a side facing the visor. Thus, with the rail mechanism described here, the already mentioned lifting or rotating movement of the movable part of the front shield can also be produced when the visor is opened.

The sliding element and the rail can be designed so that the sliding part can be inserted into the rail. In this way, the movable part of the front shield, in particular the ballistic element, can be connected to the helmet shell in a removable and slidable manner.

Independently of the mechanism for fastening the front shield to the helmet shell, the front shield may also have at least one visor fastening means for attaching the front shield to a visor of the protective helmet. Thus, the visor fastening means may be present both in the frame solution described here and in the rail solution. In the frame solution, the visor fastening means may be attached to the frame. The visor fastening means may be designed as a Velcro patch. A part of this patch may be arranged on the visor, for example on a visor arch, and the corresponding counterpart on the front shield. The visor fastening means may be designed so that a relative rotation between the visor and the front shield is possible. Thus, when the visor is opened, the already described lifting or rotating movement of the front shield may be supported.

In principle, the front shield can have a fastening means for attaching the front shield to the protective helmet. This means that the protective helmet can be worn with the front shield, but without a visor. Even without a visor, the fastening means thus prevents the front shield from rising or slipping.

The visor attachment means and/or the fixing means can be Velcro patches. This allows for easy conversion of the helmet between use with visor and use without visor: If the protective helmet is worn without a visor, the front shield can be easily attached using the Velcro patch. When the protective helmet is re-equipped with a visor, the Velcro patch between the front shield and the protective helmet can be removed and the front shield can be attached to the visor, for example on its visor arch, with another Velcro patch, in order to allow the front shield to move together with the visor as described in this document.

Another aspect of the present invention relates to a protective helmet having (a) a helmet shell and (b) a front shield as described herein.

The protective helmet may also have at least one means which cooperates with the means for fastening the front shield. For example, this may be a Velcro patch, the hook part or the fleece part being arranged, for example, on the upper side of the helmet. The front shield can then be sufficiently fastened, as described above, when the protective helmet is worn without a visor.

The attachment means can be designed in a foldable manner. This makes the attachment means as inconspicuous as possible when the protective helmet is worn with a visor.

The protective helmet may have a visor. As already described, the present invention can be used particularly advantageously in the case of a protective helmet with a visor, since the front shield moves together with the visor when it is opened and closed.

The tensioning element can be made of an elastic material that can be stretched. This means that the front shield can be easily pressed against the helmet surface and thus be very close to the helmet, and its flexibility allows the front shield to be raised at the front edge when the visor is opened.

Yet another aspect of the present invention relates to a frame for a ballistic element of a front shield for a ballistic protective helmet, the frame being configured to accommodate the ballistic element and having means for pressing the ballistic element against an outer face of a helmet shell of the protective helmet so that the ballistic element can be removably and movably attached to the helmet shell. Advantages and further embodiments of such a frame have already been described in detail, so reference is made to them here to avoid repetition.

In principle, the helmet shell within the scope of the present invention can be made of metal, fibre-reinforced synthetic material and/or a combination of both (hybrid helmet). Titanium, for example, is used as metal, and aramid fibres and/or polyethylene, for example, are used as fibre-reinforced synthetic material. In particular, the hybrid helmet has proven to be resistant to being fired by a large-calibre weapon.

In particular, the invention also makes it possible to retrofit helmets with an additional front shield, the protective helmet being able to be worn with or without a visor.

4. Brief description of the drawings

Aspects of the present invention will now be explained using preferred embodiments of the invention with reference to the drawings. The drawings show:

Figure 1A: a helmet according to the invention with a frame according to the invention, a front shield and a visor;

Figure 1B: detailed representation of the hull in Figure 1A;

Figure 2A: Side view of the exemplary embodiment of Figure 1A with visor in the closed state;

Figure 2B: Side view of the exemplary embodiment of Figure 1A with visor in the open state; and

Figure 3A: a side view of a ballistic protective helmet in another preferred embodiment without visor, with attached front shield; and

Figure 3B: Front view of the ballistic protective helmet in Figure 3A.

Figure 4: Rear view of helmet shell with rail structure to accommodate a front shield and/or frame

5. Detailed description of preferred embodiments

Figures 1A, 1B, 2A and 2B show different views of a preferred embodiment of a front shield 3 according to the invention on a protective helmet 2. This is one of several options for fastening the front shield 3 in a sliding manner to the protective helmet 2, in particular by means of a frame 9. The helmet 2 is a ballistic protective helmet, such as may typically be used by intervention forces, such as the police or other intervention forces, to protect themselves from gunfire and/or any type of force actions from outside. The embodiments of the present invention shown here relate to ballistic protective helmets for special forces and police officers, but are not exclusively limited to them, but may also be used, for example, for military use protective helmets.

The helmet shell 2 can be made of metal, fibre-reinforced plastic and/or a combination of both (hybrid helmet). Titanium, for example, is used as metal, and aramid fibres and/or polyethylene, for example, are used as fibre-reinforced plastic. The helmet shell 2 can be produced by deep-drawing, preferably from a single-piece titanium sheet, with a shell structure consisting of one or more layers being possible. It is also possible to manufacture the helmet from steel or aluminium. Likewise, one or more layers, preferably made of a fibre composite material based on ultra-high molecular weight polyethylene fibres (UHMW-PE), are optionally possible, but not limited to. Further layers made of aramid fibres can be added to these in addition. In addition to the preferred embodiment, other fibre composite materials are also possible in principle. A combination of materials is referred to as a hybrid. The helmet shell 2 can also be made entirely of synthetic material and/or fibre-reinforced synthetic material.

A front shield 3 is attached to the ballistic protective helmet 2, which can be worn in combination with a visor 4 (e.g. a vision visor). The front shield 3 or the actual ballistic element of the front shield is preferably manufactured in such a way that it meets certain requirements of the test guidelines of the VPAM (Vereinigung der Prüfstellen für angriffshemmende Materialien und Konstruktion, or Association of Testing Authorities for Attack-Resistant Materials and Construction), but is not limited to them. By attaching the front shield 3, it is possible to additionally protect the forehead, or front, area of the head 1 of a wearer of the protective helmet 2 from actions that are directed frontally (or directed towards the forehead area) against the wearer, as may be necessary in the event of a frontal shot, for example, but also in the event that cutting and piercing weapons are used for striking. Other attacks not mentioned above can also be repelled without damaging the helmet wearer in the area of the head covered by the shield. In the preferred embodiment, the front shield 3 is made of a fiber-based composite material made of high molecular weight polyethylene fibers (ultra-high molecular weight polyethylene, UHMW-PE), but can in principle also be made of other materials, such as titanium, aluminum, steel or fiber-reinforced synthetic material, for example aramid fibers. Thus, an optional additional protective effect can be guaranteed by means of the front shield 3, if this is necessary or desired in a given situation.

In the exemplary embodiment of Figures 1A, 1B, 2A and 2B, the actual front shield or ballistic element 3 is mounted on a frame 9, which can, for example, have a rubber band flange and prevents the front shield or ballistic element 3 from slipping or falling off with an additional rubber band 10. In order to prevent unintentional movement of the front shield/ballistic element 3, the front shield/ballistic element 3 is pressed against the surface of the helmet 2 by a tensioning element 8, which can, for example, be designed as a rubber band with a tab.

In addition to a rubber rim strip and the tensioning element 8, it is also possible to implement the frame 9 in another embodiment, as can be achieved, for example, by means of a sleeve-shaped frame, which completely or only partially encloses the front shield or the ballistic element 3 and can thus accommodate it. In addition to a rubber rim strip, the frame itself can also have other constructions, such as a textile element. Furthermore, a metallic embodiment of the frame is also conceivable, for example as a folded sheet metal part, to which the front shield is attached by means of, for example, quick-release fasteners or a clip connection, without the possible embodiments of the frame being limited to the embodiments mentioned.

It is important that within the scope of the present invention the frame 9 and thus the front shield or the ballistic element 3 itself accommodated therein can be moved along the surface of the helmet shell 2, so that a visor 4 attached to the helmet 2 can be moved up and down. In a preferred embodiment, the visor 4 is designed as a completely plastic visor (vision visor) in accordance with the VPAM2/VPAM3 standards, although other types of visor can also be used with the invention according to the invention. The visor 4 can also be held by a visor arch 5 and thus be connected to the rest of the protective helmet 2. The visor arch 5 can be rotatably connected to the protective helmet. This can be achieved by laterally coupling corresponding supports 6 (e.g. visor supports) to both sides of the protective helmet, on which the visor arch 5 can be rotatably coupled/supported. Preferably, the supports 6 are coupled to the helmet 2 such that they are implemented on opposite sides. However, the present invention is not limited to this form of coupling.

In a preferred embodiment, the support 6 offers at least one locking point, so that the visor arch 5 can be assumed at different angles with respect to the vertical axis of the user. This offers, in particular, the advantage that the visor 4 can be opened and the open position of the visor can be fixed, and thus an unintended folding of the visor can be prevented, for example, if the user performs a running movement. Furthermore, in a preferred embodiment, at least one further locking point is provided, which stabilises the closed state of the visor 4. The possible embodiments of the locking points are not limited to the configurations described above, but any other number of locking points can be integrated into the support 6.

In a preferred embodiment, it is possible to attach the visor arch (and thus the visor 4) to the frame 9 (and thus to the front shield or respectively to the ballistic element 3) by means of a Velcro patch 7, although other fastening mechanisms are also possible. Thus, by turning the visor arch 5 around the support 6, the visor 4 can be raised or lowered, with the front shield 3 accompanying the visor 4 in movement due to the Velcro patch 7, as the front shield 3 slides over the surface of the helmet 2.

In a preferred embodiment, one or more of the helmet components: helmet 2, protective shield or ballistic element 3, visor 4, visor arch 5, holder 6, Velcro patches 7, tensioning element 8, frame 9 and/or rubber band 10 can be made of one or more fire-retardant materials, such as leather, Nomex, Kermel, rubber, fire-retardant synthetic materials according to UL94 V-0 and metals, in order to correspondingly increase the protective effect of the helmet.

The velcro patch 7 between the visor arch 5 and the frame 9 may be arranged so as to provide a kind of hinge 11, which allows an angle to be adjusted between the frame 9 and the visor arch 5 (and the visor 4 attached to it). The direction of rotation of the visor 4 may be outward from the head 1 of a user (and vice versa).

Within the scope of the present invention, the protective helmet 2 can also be worn without a visor. Static designs are also conceivable in principle, in which the front shield 3 is attached to the helmet shell 2 by means of another Velcro patch 13, for example. The front shield 3 can also be used as a retrofit object for an existing protective helmet, which has all the necessary fastening elements for accommodating the front shield, but can also be purchased as a unit, in combination with a protective helmet. The use of the front shield is possible both with and without a frame 9, and in this case it is also possible to retrofit a protective helmet with a frame for accommodating a protective shield. The protective helmet, in combination with a movable front shield according to the invention (with or without a frame), can also be combined with a visor 4 (for example a vision visor), and the visor 4 can also be designed as an optional additional equipment option. According to the invention, the retrofitted visor can also be configured movably with retrofitted front shield (with and without frame) as a unit on the surface of the helmet shell.

The at least one tensioning element 8 fulfils two important functions: on the one hand, the tensioning element ensures that the frame 9 is pressed against the helmet shell 2. On the other hand, the at least one tensioning element 8 serves to allow a joint movement of the frame and visor on the helmet shell, making it possible to lift the frame by its lower edge during movement on the surface of the helmet shell due to its non-spherical shape. For example, an elastic and tensionable material can be implemented in a relatively simple way, by means of a rubber band or an elastic fabric, for example based on elastane. In a preferred embodiment, the tensioning element is designed such that it has a loop-shaped structure 12 at at least one end, which can be used to hook it to at least one support and thus, due to the tension force, press the front shield with or without a frame against the helmet shell.

3A shows a side view of a ballistic protective helmet 2 in a further embodiment, not claimed, in which the helmet 2 can be worn without a visor and without the corresponding visor arch. The front shield or its ballistic element 3 are also inserted into a frame 9 and are accommodated by it. The frame 9 is held in position by a fleece 13, which is applied to the upper side of the helmet 2 (preferably by means of an adhesive bond), and by a fastening element 14 in the form of a hook pad hooked to the fleece 13. The fastening element 14, which can be attached to the frame 9 by a strap, for example, protects the frame 9 from unintentional movements, for example from slipping or falling. In a preferred embodiment, the ballistic element 3 of the front shield can be additionally connected to the frame 9 by means of a further retaining element 14, thereby preventing the ballistic element 3 from slipping or falling off the frame 9. When the protective helmet with visor 4 is worn, this retaining function is assumed by the Velcro patch 7. An additional connection between the helmet 2 and the frame 9 can be created by means of an additional Velcro patch 16, which is detachable in a preferred embodiment. For this purpose, the Velcro patch 7 is connected to the Velcro patch 16 in the preferred embodiment. This serves to prevent the frame 9 from accidentally lifting and/or slipping off the helmet 2.

Figure 3B shows a front view of the ballistic protective helmet 2 of the additional embodiment not claimed in Figure 3A, in which the protective helmet 2 is worn without a visor and only the ballistic element 3 of the front shield is coupled to the helmet 2 on the frame 9 and is further secured by the additional fastening element 10. By means of the Velcro patches 7, 14, 15, 16, the frame 9 can be prevented from accidentally separating and/or slipping off.

4 shows an alternative solution for a front shield, which can be moved together with a visor. A front shield rail structure 18 is attached to the helmet shell 2, which in a preferred embodiment has a T-slot into which a movable part of the front shield is inserted. A corresponding recess 19 in the rail structure 17 allows the insertion of the T-shaped sliding piece 18. In this way, the movable part of the front shield, in particular its ballistic element, can be pushed forward through the rail structure 17 towards the visor arch 5, to which the visor 4 is attached, and can be connected to it by means of the Velcro patch 7. This rail structure 17 also allows the front shield 3 to move along the surface of the helmet shell 2. This alternative solution can also be used both with and without a visor. The rail structure can be permanently attached to the helmet shell (for example by direct adhesion) or also detachably. If the guide rail is detachably attached to the helmet shell, in an embodiment not claimed, a Velcro patch can be used for temporary attachment. On the side of the rail structure 17 facing the visor arch 5, a stop for the T-shaped sliding piece 18 can be provided, which serves in particular to prevent the head protector from accidentally slipping off when the protective helmet 2 is worn without a visor. Velcro patches 7 and 16 can be used for fixing.

In a further embodiment, a pair of flexibly designed guide rails, which can be fixed either permanently or removably to the helmet shell, can also be used to support the front shield in a movable manner. Particularly suitable for mounting are synthetic materials, flame-retardant synthetic materials and/or synthetic materials modified for impact resistance, in accordance with UL94 V-0, as well as metals.

List of reference symbols

1 head

2 helmet / protective helmet / helmet shell

3 shield / front shield / ballistic element

4 visor / vision visor

5 visor attachment medium / visor bow

medium

sailboat patch

tension element

frame

rubber band

hinge

loop-shaped end of the tensioning element

plush

clamping element

clamping element

sailboat patch

rail structure

T-shaped sliding piece

insertion opening for sliding piece

Claims (14)

1. Front shield (3) for a ballistic protective helmet (2), which is configured to move together with the visor (4) when a visor (4) of the protective helmet (2) is opened and closed, characterized by that The front shield (3) has a device (9) for detachably and slidingly coupling the front shield (3) to the protective helmet (2). 2. Front shield (3) according to claim 1, wherein the device is a frame (9) having means (8) for pressing the front shield (3) against an external face of a helmet shell of the protective helmet (2). 3. Front shield (3) according to claim 2, wherein the means are at least one tensioning element (8) that is configured to be fastened to at least one visor support (6) of the protective helmet (2). 4. Front shield (3) according to claim 3, wherein the tensioning element (8) is attached closer to a side of the frame (9) facing away from a visor (4) of the protective helmet (2) than to a side of the frame (9) facing towards the visor (4). 5. Front shield (3) according to one of claims 2 to 4, wherein the frame (9) is made of at least one fireproof material. 6. Front shield (3) according to claim 1, wherein the device is at least one rail (17) that is configured to be attached to the protective helmet (2) and to slideably retain a part of the front shield (3). 7. Front shield (3) according to claim 6, wherein the movable part of the protection shield (3) has a sliding element (18) that is configured to slide in the rail (17). 8. Front shield (3) according to one of claims 1 to 7, further comprising at least one visor fastening means for attaching the front shield to a visor of the protective helmet. 9. Front shield (3) according to one of claims 1 to 8, further comprising at least one fixing means for fixing the front shield (3) to the protective helmet (2). 10. Front shield (3) according to one of claims 8 or 9, wherein the visor fastening means and/or the fixing means are a velcro patch (7). 11. Protective helmet (2), which presents: (a) a helmet shell and (b) a front shield (3) according to one of claims 1 to 10. 12. Protective helmet (2) according to claim 11, further comprising at least one means that cooperates with the means (7) for fixing the front shield (3) according to claim 10. 13. Protective helmet according to one of claims 11 or 12, further comprising a visor (4). 14. Frame (9) for a ballistic element of a front shield (3) for a ballistic protective helmet (2), the frame (9) being configured to accommodate the ballistic element and having means (8) for pressing the ballistic element against an outer face of a helmet shell of the protective helmet (2), such that the ballistic element can be removably and movably attached to the helmet shell.