WO2012059081A2

WO2012059081A2 - Protection arrangement for the body of a living being, in particular protection helmut

Info

Publication number: WO2012059081A2
Application number: PCT/DE2011/001889
Authority: WO
Inventors: Uwe Barth; Christian Hosse
Original assignee: Schuberth Gmbh
Priority date: 2010-11-05
Filing date: 2011-10-25
Publication date: 2012-05-10
Also published as: DE102010050678B3; WO2012059081A3

Abstract

The invention relates to a protection arrangement for the body of a living being, in particular in the form of a protection helmet, comprising a hard outer casing (1), an inner structure (2) which is designed to be placed on the body of the living being and a nub arrangement which is inserted between the inner structure (2) and the hard outer casing (1), said nub arrangement comprises a plurality of impact-dampening hollow nubs (13) which are provided on the front side (24) for placing on the hard outer casing (1) and which can be reversibly deformed for protecting against multiple shock effects. Said arrangement effectively protects against impacts despite the reversible shaping such that said hollow nubs (13) have an annular lower part (21) and at least one annular upper part (22) which is arranged in the direction of the hard outer casing, the upper part (22) and lower part (21) being connected by a binding piece (23) such that when an impact strikes the upper part (22), said upper part can be pushed radially inwards in a rolling manner into the annular lower part (21), starting from one of the connecting pieces (23), and said parts return to their initial position after the impact due to the return force of the deformed material, and the annular lower part (21), the connecting piece (23) and the annular upper part (22) are produced as an integral plastic part.

Description

Protective arrangement for the body of a living being, in particular protective helmet

The invention relates to a protective arrangement for the body of a living being, comprising

a hard outer shell,

an internal construction, which is designed to rest on the body of the living being and

an inserted between the inner structure and the hard outer shell knob assembly of a plurality of shock-absorbing hollow knobs, which are provided with an end face for engaging the hard outer shell and the reversibly deformable for protection against multiple shocks.

Such a protective arrangement may be provided for all parts of the body of a living being to dampen the transmission of impact of any kind on the body of the living being. The protective device can, for example, as a bullet-proof vest the trunk of a living being, especially a human, surrounded, in order to avoid possibly fatal injury to the living being by projectiles. The hard outer shell may be formed by suitably arranged fabric layers, which consist of highly tear-resistant fibers and therefore are able to stop a conventional firearms projectile. The "hard" outer shell is therefore understood to mean any external arrangement that can provide protection against penetrating objects The shock-absorbing nub arrangement has the function of reducing the impact of the impact, for example due to the impacting projectile and the hard outer shell, on the body ,

A main application of a protective device according to the invention consists in the formation of a protective helmet that protects the helmet wearer from impact. Such impacts can at

Confirmation copy] a safety helmet, for example, by falling objects, in a sports or motorcycle helmet, for example, by falls and a military helmet, for example, by impacting projectiles are caused.

For military helmets, it is known to provide integrally formed hollow knobs on a basket-like carrier, which is designed as a band structure, pointing away from the carrier annular end faces in the direction of the hard outer shell of the helmet. In a hard blow on the hard outer shell of the helmet, the hard outer shell deforms the underlying hollow knobs plastically and the plastic deformation of the impact energy is completely or largely consumed, so that on the head of the home wearer possibly only a small proportion of acting on the hard outer shell Impact energy is transmitted. Such arrangements have been proven, but have the disadvantage that the helmet is plastically irreversibly deformed at the point of impact, so that a renewed impact action is not attenuated at the same location or in the vicinity in the intended manner. Rather, after a strike, the helmet must be changed to give the helmet wearer complete protection by a safety helmet.

There are applications for protective arrangements of the type mentioned above, in which the use of plastically deformable material for the energy consumption of an acting impact energy is not suitable. This is the case, for example, for sports equipment, which can be subjected to numerous impact effects when practicing sports, as is the case, for example, in a football game. The used body protection or head protection can not be changed naturally every turn. It is therefore known, in particular for sports equipment, to provide shock-absorbing knob arrangements which are reversibly deformable. They consist of knobbed walls whose walls have the shape of a double trapezoid in cross section, with the largest diameter being halfway up the nub. By impact, the corresponding knob wall is bulged outward, whereby it is compressed by the impact action from its initial height. Such a knob arrangement is known, for example, from EP 2 146 177 A2. The knobs are made of an elastic material, so that they stand up again after the end of impact in the starting position. The absorption of the impact energy caused by the bulging of the walls can be further assisted in that the hollow knobs are closed on the end face and have a small vent opening, through which air escapes from the interior of the hollow knob when the knobs are pressed together. The deferment of the knob in its starting position is thereby further delayed. The delay of the elastic recovery is required for the shock-absorbing effect, since in an ideal elastic shock, the complete impact energy is known to be passed on, so that in this case, no shock-absorbing effect would occur.

It is to be regarded as a disadvantage when the shock-absorbing effect on the displacement of air from the interior of the knob or the delayed provision based on the inflow of air into the interior of the knob. For this purpose, namely defined flow conditions must be ensured by the vent. However, the vent is subject to considerable loads and can therefore change, in particular, the knobbed wall can tear at the vent, where completely Undefined damping ratios would arise.

The present invention is therefore based on the object, a protective arrangement of the aforementioned in such a way that even at a reversible deformation of the hollow knobs a defined damping is achieved with multiple impact action.

To achieve this object, a protective arrangement of the type mentioned above according to the invention is characterized in that the hollow knobs have an annular lower part and at least one in the direction of the hard outer shell arranged above annular upper part, that upper part and lower part are connected by a connecting piece so that in a blow impact on the upper part of this under one of the connector outgoing, radially inward rolling deformation in the annular lower part is pressed and zurückverstellt after completion of the impact by a restoring force of the deformed material in the starting position and that the annular lower part, the connecting piece and the annular upper part as integral plastic part are made.

The protective arrangement according to the invention thus has a nub arrangement of numerous hollow knobs, wherein the hollow knobs are formed at least in two stages. The first stage consists of an annular lower part and the second stage of an annular upper part, wherein O- berteil and lower part are connected by a connecting piece. The connecting piece is designed such that upon pressure on the upper part in the direction of the lower part, starting from the connecting piece, a rolling deformation takes place, through which the annular upper part is pressed into the annular lower part. The movement of the upper part into the lower part is reminiscent of the deformation of the wall of a rubber bellows of an air spring, wherein the spring effect is achieved by the air cushion and the rubber bellows only allows the compression of the air space. In contrast, the shock absorption according to the invention is achieved by the material deformation, which takes place in the form of rolling the upper part into the lower part. To achieve this defined rolling motion, it may be useful to form the upper part with respect to the wall thickness of the lower part of the wall thickness. This ensures that initially the upper part performs the rolling deformation, while the lower part still remains largely dimensionally stable. Only when the impact is so great that the upper part is completely within the lower part, there is an elastic deformation of the lower part.

The targeted control of the rolling deformation can be effected in that the connecting piece is formed with an annular material weakening. The connecting piece establishes a stepped transition between the annular lower part and the annular upper part, wherein the annular lower part must have a larger outer circumference than the annular upper part, so that the upper part can deform into the lower part. An aterialschwächung provided on the step-shaped transition ensures at an axial load in the direction of the longitudinal axis of the hollow knob by the impact action for folding the connector to the material weakening, whereby the upper part is pressed into the lower part beginning at the connector and thereby rolls inwards.

For a higher damping or a greater damping travel, it may be expedient to design the hollow knot not only in two stages but in three stages or in several stages. Instead of a shell then two or more tops are provided, which connect via a respective connecting piece to the lower part and the upper part lying underneath.

In an expedient embodiment of the invention, the annular lower part and the at least one annular upper part are designed in the shape of a truncated cone with an outer circumference which narrows towards the outer shell. As a result, the rolling deformation in the lower part or the lower part lying under another upper part is under supports. For a uniform damping from all directions, it is expedient to form the hollow knobs with a circular cross-section. For certain positions, especially in a protective helmet, but it may also be useful to provide a certain anisotropy of the protective effect by an oval design of the studs. In such cases, however, it is preferred that the cross-section of the knobs be rounded, since the formation of corners could hinder a uniform reversible deformation.

A main application of the protective device according to the invention is the formation of a protective helmet, in which the Innenkonstrukti- onsanlage is formed on the head of a helmet wearer. In particular, such a protective helmet can be designed as a bulletproof military protective helmet.

It is preferred if the hollow knobs are integrally formed on a basket-like carrier. The basket-like support can, as known and proven, consist of interconnected strip-shaped sections, which are arranged at intervals to each other. Such a design of the basket-like carrier is known, for example, from EP 0 423 379 B1.

The invention will be explained in more detail below with reference to exemplary embodiments illustrated in the drawing. Show it:

1 shows a longitudinal section through a protective helmet with a hard outer shell and a basket-like support with inventively designed hollow knobs;

Figure 2 is a plan view of a one-piece, lying flat

A band assembly with which the basket-like carrier is malleable; a high section through a first embodiment of a two-stage nub arrangement; a detailed view of a connector of the embodiment of Figure 3; A second embodiment of a two-stage knob

an enlarged detail of the connector of the knob according to Figure 5; a high section through an embodiment of a three-stage knob;

Figure 8 to 10 high-sectional representations illustrating different deformation levels in the action of an axial force on the knobs. Figure 1 shows a longitudinal section through a protective helmet, which may be formed for example as a military protective helmet. The helmet has in a known manner a hard outer shell, which should protect the head of the helmet wearer against the ingress of foreign bodies. The hard outer shell prevents, for example, that sharp objects can penetrate the fall of the items or in a fall of the helmet wearer in the head of the helmet wearer. In a military protective helmet, the outer shell 1 further prevents, to some extent, that projectiles can penetrate to the head of the helmet wearer.

Furthermore, the protective helmet should also protect against the effects of impacts, for example also when impacting a projectile. For this purpose, a protective helmet is provided with an inner structure 2, which keeps the head of the helmet wearer away from the hard outer shell and absorbs impact energy when impacted, so that it is not or only with a significantly reduced force per time forwarded to the head of the helmet wearer.

The inner structure 2 has in the illustrated embodiment fastening strips 3, which are fixed with a conventional, ballistically resistant screw 4 on the outer shell 1. In the exemplary embodiment according to FIG. 1, a fastening strip 3 is located in the center of the helmet in the neck region. Two fastening strips are arranged on each side of the helmet on one side, so that the inner structure 2 is held on the outer shell 1 with a total of three fastening strips. At the attachment strip 3 lugs 5 are attached, with which chin strap 6 and neck strap 7 are fastened. With the chin strap 6 and the neck strap 7, the helmet is firmly attached to the head of the helmet wearer and secured against accidental fall. With the mounting strip 3, a circumferential around the circumference of the head of the helmet wearer head band 8 is also connected. The headband 8 is surrounded with a cushioning material 9, such as a soft leather, and provided for abutment on the head of the helmet wearer. With Streckversehl üssen 10 in the form of lugs and through holes numerous ends of a basket-like carrier with the headband 8 are connected. Through this connection, the carrier 1 formed from a flat material bulges like a basket and surrounds the skull of the helmet wearer without directly abut her.

The basket-like carrier 11 has on its radial outer side a knob arrangement 12 with numerous hollow knobs 13. The vast majority of the hollow knobs 13 is formed in a manner according to the invention, which is described in more detail below. These hollow knobs 13 can be supplemented by simple hollow knobs 13 '. For the present invention, however, it is preferred if all or at least almost all hollow knobs 13 are formed in the manner according to the invention.

The attachment of the basket-like support 11 on the outer shell 1 by means of the fastening strip 3 via the headband 8 is such that rest over the entire outer surface of the basket-like support hollow studs 13 on the inner wall of the hard outer shell 1 under a certain bias, so that the basket-like support 11 in a shape defined by the outer shell 1 is fixed.

At the head band 8 a hairnet 14 is further attached, with which it is ensured that normally the head of the helmet wearer does not rest on the basket-like support 11. Without a force from the outside, the head of the helmet wearer thus has contact with the headband 8 and the hair net 14 of the inner structure. In addition, of course, keep the chin strap 6 and the neck strap 7 the helmet on the head of the helmet wearer. Figure 2 illustrates that the basket-like support 11 consists of numerous strip-shaped sections 15, which are arranged at a distance from each other, so that the basket-like support 11 due to a grid structure allows good ventilation of the head of the helmet wearer. The strip-shaped sections 15 form a central top part 16, which has the shape of an oval ring. The basket-like carrier 11 is a one-piece plastic part, which can be produced according to Figure 2 as a flat-lying plastic part. In this case, eight strip-shaped sections 15 extend rectilinearly radially outward from the central upper head section 16 from the central upper head section 16 and have at their ends locking sections 17 which can be provided with a shaped through-opening 18 in order to engage with a corresponding counterpart of the headband 8, for example in mushroom form to form the plug-in closure 10. One of the radially extending strip-shaped portions 15, which is provided for connection to the headband 8 in the neck area, has a widened attachment piece 19, with which a more stable connection to the headband can be produced.

It can be seen in FIG. 2 that some strip-shaped sections 15 are formed as connecting sections between the radially extending strip-shaped sections 15 and extend in the circumferential direction. Some strip-shaped portions 15 extending in this circumferential direction are also formed with closure ends 17 to form a closure 20 together with a corresponding counterpart. By closing the closures 20 and the plug-in closures 10 to the headband 8, the one-piece plastic part lying flat in FIG. 2 is arched up to form the basket-like carrier 11, as can be seen in FIG.

The hollow knobs 13 are, as Figure 2 shows, on the strip-shaped portions 15 of the basket-like carrier 11. In this case, the strip-shaped portions 15 to allow the best possible ventilation the head of the helmet wearer only as wide as the corresponding width extension of the hollow knobs 13 is formed. The hollow knobs are preferably formed with a round cross section, so that the largest diameter of the hollow knobs 13 corresponds approximately to the width of the strip-shaped sections 15. The hollow knobs according to the invention are elastically deformable, that is designed to be reversibly deformable.

A first embodiment of a hollow knob 13 according to the invention is shown in FIGS. 3 and 4. Starting from the respective strip-shaped sections 15, the hollow knob 13 extends radially outward relative to the basket-like carrier 11. This is done with an annular lower part 21, to which an annular upper part 22 connects radially outward. The annular lower part 21 and the annular upper part 22 are connected to each other by a connecting piece 23. The annular upper part 22 ends in a substantially planar end face 24, with which the hollow knob 13 comes to rest on the inner wall of the hard outer shell 1.

The annular lower part 21 is frusto-conical with an upwardly tapering outer diameter. By the connecting piece 23 creates a step-like jump in the outer diameter, since the outer diameter of the annular upper part 22 is smaller than the outer diameter of the annular lower part 21 in the amount of the connecting piece 23. The annular upper part is formed frusto-conical, so that the outer diameter of the annular upper part radially outside (top) down. In particular, the annular upper part 22 has an upwardly curved outer wall, so that the reduction of the diameter is not linear but upwards increasingly. A similar curvature, albeit to a lesser extent (greater radius of curvature), may also be provided for the annular base 21. The connecting piece 23 consists essentially of a horizontally extending portion with which the step-shaped outer and inner diameter reduction in the transition from the annular lower part 21 to the annular upper part 22 is realized.

In a preferred embodiment of the invention, the annular lower part 21 has a greater wall thickness than the annular upper part 22. As a result, a sequential deformation - initially the upper part 22, then the lower part 21 - supported, as will be explained in more detail below.

The detail in Figure 4 illustrates that the substantially horizontally extending connector 23 may have an annular top which is inclined radially inward, so that the transition from the annular lower part 21 to the annular upper part 22 results in a reduction in the wall thickness of the horizontal connector 23 , As a result, a targeted material weakening is effected at the connection between the annular upper part 22 and the connecting piece 23.

The illustrated in Figures 5 and 6 second embodiment of a hollow knob 13 according to the invention corresponds to the embodiment shown in Figures 3 and 4. To reinforce the weakening of material, only one circumferential groove 25 is provided in the connecting piece 23 on the annular upper side, by means of which the wall thickness of the connecting piece 23 at the transition to the annular upper part 22 is markedly reduced.

A further embodiment of the hollow knob 13 according to the invention is shown in FIG. In this embodiment, the hollow knob is not - as before - in two stages of an annular lower part 21 and annular upper part 22, but three stages formed and consists of an annular lower part 21, a first annular top 22 and a second annular top 26. Accordingly located between the annular lower part 21 and the first annular upper part 22, a first connecting piece 23 and between the first annular upper part 22 and the second annular upper part 26, a second connecting piece 27. The two connecting pieces 23, 27 have the same functions and can in the same way as the connecting pieces 23 may be formed in the embodiments of Figures 4 and 6. Accordingly, the connecting pieces 23 and 27 each cause a sudden reduction in the outer diameter and inner diameter of the annular lower part 21 to the first annular upper part 22 on the one hand and from the first annular upper part to the second annular upper part 26 on the other.

Preferably, it is further provided that the second annular upper part 26 has a smaller wall thickness than the first annular upper part 22, whose wall thickness is in turn smaller than the wall thickness of the annular lower part 21st

FIGS. 8 to 10 illustrate a deformation profile for a hollow knob 13 according to the first embodiment shown in FIGS. 3 and 4.

FIG. 8 shows hollow knobs 13 in an unloaded state. If, in FIG. 8, a force F acts from above due to a striking effect, this leads to bulging deformation of the annular upper part 22 and to a depression of the material of the annular upper part 22 into the region of the annular lower part 21, wherein the connecting piece 23 is angled downward in an annular manner and thus leads to a rolling movement on the material of the annular lower part 21. Figure 9 showed a deformation with only a small force or an intermediate stage of the deformation with a larger force. The induced by the force F deformation continues with sustained force and causes the annular lower part 21 radially outwardly (with respect to the hollow knob 13) bulges out and the rolling movement of the material of the intermediate piece 23 and then the material of the annular Upper part 22 continues on the inner wall of the annular lower part 21 until the end position of the reversible deformation shown in Figure 10 is reached. In this end position, the material of the annular upper part 22 is folded by rolling with respect to the height next to the material of the annular lower part 21, so that now a compact elastic stamp is formed.

The energy absorption required for shock absorption is provided by the material deformation and the friction of the material of the annular top 22 against the material of the annular base 21, so that the impact energy is converted to heat generated during the deformation by the friction.

From the deformed position according to Figure 10, the material of the hollow knob 13 is expressed via the intermediate position of Figure 9 in the starting position of Figure 8 due to the elastic restoring forces back. This return movement is slow, so that the forces acting on the head of the helmet wearer are low and spread over a longer time.

It is readily apparent that, when using a three-step hollow knob 13 according to FIG. 7, the same deformation processes take place as are illustrated with reference to FIGS. 9 and 10. They only take place once more and lead to the fact that in the end position (analogous to FIG. 10) the material of both upper parts 22 and 26 nests radially one inside the other with respect to the center axis of the hollow knob 13 and lies next to one another within the material of the annular lower part 21. Of course, four- and five-stage hollow knobs are conceivable. In the practical embodiment, however, the two-stage, possibly the three-stage design of the hollow knob will be significant.

The inventive design of the hollow knobs 13 does not lead to a fundamental change in the number of knobs on the basket-like carrier 11. The inventive design of the hollow knobs 13 requires for effective absorption of energy for shock absorption a certain minimum wall thickness, so that the largest diameter of the hollow knobs 13 greater than 8 mm should be. A preferred largest diameter of the hollow knobs 13 is between 10 and 20 mm.

For a protective helmet, between 30 and 120 hollow knobs 13 are provided, preferably between 40 and 100.

The hollow knobs 13 according to the invention also permit the formation of other body protection parts, such as, for example, impact-resistant or impact-resistant protectors, which can be used essentially flat in clothing pieces. In these cases, the hollow studs 13 according to the invention can also have a larger maximum outer diameter, which can be up to 50 mm. In particular, in these cases, a multi-level design of the hollow knobs 13 may be useful.

Li / ms

Claims

claims

A protective device for the body of a living being, comprising a hard outer shell (1),

an inner structure (2), which is designed to rest on the body of the living being and

an inserted between the inner structure (2) and the hard outer shell (1) nub assembly of a plurality of shock-absorbing hollow knobs (13) having an end face (24) for engagement with the hard outer shell (1) and the reversibly deformable for protection against multiple Shocks are provided, characterized

the hollow knobs (13) have an annular lower part (21) and at least one annular upper part (22) arranged above in the direction of the hard outer shell,

in that the upper part (22) and the lower part (21) are connected by a connecting piece (23) in such a way that upon being impacted on the upper part (22) this deforms radially outward from the connecting piece (23) into the annular lower part (22). 21) can be pressed and zurückverstellt after completion of the impact by a restoring force of the deformed material in the starting position and

in that the annular lower part (21), the connecting piece (23) and the annular upper part (22) are produced as an integral plastic part. A protective arrangement according to claim 1, characterized in that the upper part (22) is formed with a relation to the wall thickness of the lower part (21) of smaller wall thickness.

Protection arrangement according to claim 1 or 2, characterized in that the connecting piece (23) is formed with an annular material weakening (25).

Protective arrangement according to one of claims 1 to 3, characterized in that the annular lower part (21) and the at least one annular upper part (22) are frusto-conical with an outer shell (1) down towards the outer circumference.

Protection arrangement according to one of claims 1 to 4, characterized in that the upper part (22) is connected as a first upper part via a second connecting piece (27) with a second annular O-berteil (26), which in a striking effect under a radially inward from the second connecting piece (27) outgoing rolling deformation in the first upper part is pressed and that at a maximum impact action, the two O- berteile (22, 26) are pressed radially into one another in the lower part (21).

Protection arrangement according to one of claims 1 to 5, characterized in that the annular upper part (22) and the annular lower part (21) have a rounded cross-section.

Protection arrangement according to one of claims 1 to 6 in the form of a protective helmet, in which the inner structure (2) is designed to rest on the head of a helmet wearer. Protection arrangement according to claim 7, characterized in that the protective helmet is designed as a bulletproof military protective helmet.

Protection arrangement according to claim 7 or 8, characterized in that the hollow knobs (13) are integrally formed on a basket-like carrier (11).

Protection arrangement according to claim 9, characterized in that the basket-like support (1 1) consists of interconnected strip-shaped sections (15), which are arranged at intervals to each other.