FASTENING SYSTEM AND METHOD FOR LOCKING AND RELEASING A FIRST CLOSURE ELEMENT TO AND FROM A SECOND CLOSURE ELEMENT BY MEANS OF A FASTENING SYSTEM

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001]The present application is a continuation of PCT/EP 2024/071061 filed on Jul. 24, 2024 claiming priority to DE 10 2023 123 618.0 filed on Sep. 1, 2023, the entire contents of each of which are incorporated herein by reference for all purposes.

BACKGROUND

Field

[0002]The disclosure relates to a fastening system. Furthermore, the disclosure relates to a method for locking and releasing a first closure element to and from a second closure element by means of the fastening system.

Prior Art

[0003]With protective helmets and other safety clothing, it is frequently necessary to lock various accessory items to the helmet or to the garment and to release them again later. Such helmet accessories include, for example, light sources in the form of headlamps, visors, radio devices, and similar items. Locking the accessory should be as simple as possible to accomplish, since the user of the helmet is wearing the helmet and therefore cannot see it. Releasing the accessory item should also be possible in a simple manner. At the same time, however, unintentional release should be prevented. Simple locking and releasing is also advantageous for other protective clothing, for example for protective vests.

[0004]A fastening system for helmets, such as protective helmets, and other protective clothing should therefore enable simple locking and releasing and at the same time prevent unintentional releasing. When the accessory items are secured, for example, merely by magnets, they can be locked easily; however, depending on the strength of the magnets, either releasing is impeded or unintentional releasing is likely.

SUMMARY

[0005]The object of the disclosure can be to provide a fastening system for safety helmets and protective clothing, which locks accessory items securely and easily without making releasing more difficult.

[0006]This object can be achieved by means of a fastening system, comprising a first closure element and a second closure element which are configured to be locked to one another by a movement of the first closure element relative to the second closure element along a locking direction and to bring into a locked state, wherein the first closure element comprises at least one pivotably hinged latching element, wherein the second closure element comprises at least one receiving component with a stop wall, wherein the fastening system comprises a return element configured to exert an actuating force on the latching element in order to pivot the latching element in the direction of the receiving component of the second closure element such that the stop wall of the second closure element limits a movement of the latching element and thus of the first closure element in an opposite direction, wherein the opposite direction can be opposite to the locking direction, wherein the receiving component and the latching element each comprise at least one release wall which can be configured to slide on one another in the event of a movement of the first closure element relative to the second closure element along a release direction, in order to pivot the latching element out of a fixed position counter to the actuating force into a release position, wherein the release direction runs transversely to the locking direction.

[0007]In the fastening system according to the disclosure, for example, one of the closure elements can be connected to a protective helmet or a safety vest, and the other closure element can be connected to an accessory item, for example a visor or a lamp. Advantageously, the closure elements can be easily locked to one another by moving them toward one another along the locking direction. In the locked state, the latching element can be pivoted by the actuating force such that it engages in the receiving component of the second closure element. The stop wall of the receiving component prevents the first closure element from being removed from the second closure element again by movement in the opposite direction. In this way, unintentional releasing of the closure elements from one another can be prevented.

[0008]To release the closure elements from one another, they can be moved against one another along the release direction, which differs from the locking direction and the opposite direction. This causes the release walls of the receiving component and of the latching element to slide on one another and the latching element to be moved by this sliding movement from its fixed position into the release position. In the release position, the latching element can be no longer arranged in the receiving component and can be therefore no longer limited by the stop wall. Accordingly, the first closure element can be easily released from the second closure element without the latching element pressing against the stop wall.

[0009]The advantage of this fastening system can be that, inter alia, the release direction defines a specific direction along which the closure elements must be released from one another. This substantially prevents unintended releasing without making the releasing process itself more difficult.

[0010]The release direction runs transversely to the locking direction. As used in this description, the term “transverse” means that the directions running transversely to one another can be not parallel to one another, but form an angle between them. The angle between the release direction and the locking direction can be at least 20°, or at least 45°, and further can be at least 60°. The release direction and the locking direction can be substantially orthogonal to one another.

[0011]The first closure element and the second closure element of the fastening system are, in the locked state, locked or rather fastened to one another. In a released state, the first closure element and the second closure element can be disconnected from one another.

[0012]The latching element can be pivotably hinged to the first closure element, for example, by way of a flexure bearing or a flexure hinge. The actuating force acts on the latching element via the return element in order to pivot the latching element from the release position into the fixed position. The latching element in the fixed position projects from a surface of the first closure element. In the release position, the latching element can be recessed, such as, the surface of the first closure element. In order to move the latching element from the fixed position into the release position, a force must be applied that overcomes the actuating force. This can be done, for example, by a user of the helmet moving the closure elements against one another. The release walls guide the movement of the latching element and ensure that, during movement along the release direction, the latching element experiences a force component counter to the actuating force.

[0013]In an example embodiment, the first closure element has a first contact surface and the second closure element has a second contact surface, wherein, in the locked state, the first contact surface can be in contact at least in sections with the second contact surface in a contact direction, wherein the contact direction extends transversely to the locking direction, wherein the latching element can be hinged to the first contact surface, wherein the actuating force comprises a force component along the contact direction in order to pivot the latching element out of a plane of the first contact surface. The contact surfaces ensure that the closure elements, in the locked state, can be in contact with one another securely and that a defined contact zone can be provided. The contact direction extends transversely to the locking direction and/or to the opposite direction and can also transversely to the release direction. The first contact surface and the second contact surface move along one another when the first closure element can be locked to the second closure element along the locking direction. The first contact surface and the second contact surface move relative to one another when the first closure element can be released from the second closure element along the release direction. The first contact surface and the second contact surface can be planar surfaces. The latching element projects from the first contact surface when it can be in the fixed position. The contact direction has an angle of at least 45° relative to the locking direction. The contact direction can be substantially orthogonal to the locking direction.

[0014]According to one embodiment, the first contact surface can be an upper side of the first closure element and the second contact surface can be an underside of the second closure element. A reversed arrangement can be also encompassed by the disclosure. The first closure element and/or the second closure element can be a flat body. The contact surfaces extend along an upper side or an underside of the flat body.

[0015]In an example embodiment, the latching element can be configured as a spring tab, and a spring component of the spring tab can be the return element. In other words, by configuring the latching element as a spring tab, the return element can be integrated in the latching element. The actuating force can be then a spring force that acts on the spring tab. The fixed position of the latching element can be a resting position of the spring tab. By contrast, the spring tab can be deflected from the rest position in the release position, such that the spring force, or rather actuating force, acts on the spring tab. A rear side of the spring tab can be hinged to the first closure element, while a front side of the spring tab can be freestanding and, in the locked state, points in the direction of the stop wall. If the first closure element can be thus moved in the opposite direction relative to the second closure element, the front side of the spring tab hits the stop wall and prevents any further movement in the opposite direction. The latching element can be configured as a leaf spring.

[0016]In an example embodiment, the receiving component can be configured as a recess in the second closure element, wherein the recess can be configured to be form-fitting with the latching element at least in sections. The receiving component can be introduced into the second contact surface or arranged on the second contact surface. For example, the receiving component can be configured as a recess in the second contact surface. The receiving component can be introduced in the second closure element such that the receiving component can be arranged, in the contact direction, opposite the latching element of the first closure element when the first closure element can be locked to the second closure element in the locked state. The stop wall can be configured as a front wall of the recess.

[0017]During locking of the closure elements to one another, the latching element can be depressed, for example, by the second contact surface, and moved into the release position until the latching element can be arranged opposite the receiving component. The receiving component provides the space that the latching element requires to move back into the fixed position as a result of the actuating force. The release wall now prevents the first closure element from being moved back again in the opposite direction.

[0018]In one example embodiment, the first closure element and the second closure element each have a guide wall that extends along the release direction, the guide walls being in contact with one another in the locked state, wherein the first closure element and the second closure element can be displaceable against one another along the guide walls in the locked state in order to slide on one another and to release the first closure element from the second closure element, wherein the release walls can be arcuate. The guide walls can be configured to facilitate releasing of the closure elements from one another by prescribing a positive guidance of the movement of the closure elements against one another. The closure elements can be moved by the guide walls, along a control curve, along which the closure elements can be easily released from one another. The release direction extends along an arcuate path, such that the arcuate release walls follow the release direction.

[0019]According to one embodiment, one of the guide walls has a guide groove and the other guide wall comprises a projecting holding projection, wherein the holding projection engages in the guide groove in the locked state, wherein the guide groove extends in the release direction, and wherein a length of the guide groove can be greater than a length of the holding projection in the release direction. The holding projection and the guide groove can be configured to facilitate the release movement by guiding the movement along the release direction. Movements perpendicular to the release direction can be partially prevented. The holding projection and the guide groove prevent the closure elements from being moved along the contact direction during the releasing process.

[0020]According to a further embodiment, one of the guide walls has at least one holding plate protruding in the locking direction and the other guide wall comprises at least one guide notch, wherein the holding plate can be arranged in the guide notch in the locked state, wherein the guide notch and the holding plate each extend in the release direction, wherein a length of the guide notch can be greater than a length of the holding plate in the release direction. As with the guide groove and the holding projection, the release movement can be guided by the guide notch and the holding plate, and the release of the closure elements from one another can be facilitated. The fastening system comprises two holding plates and two guide notches, which can be each arranged on both sides of the latching element and of the receiving component, offset in the release direction. The holding plate and/or the guide notch have beveled side walls. The bevels extend in a plane of the contact surfaces such that, by means of the bevels, the closure elements can be released from one another during the release movement.

[0021]In one example embodiment, the release wall of the latching element and/or of the receiving component can be chamfered. A chamfered configuration of the release wall facilitates the movement of the latching element from the fixed position into the release position since the chamfered walls guide the movement of the latching element during releasing. The edges of the latching element and/or the edges of the receiving component can be configured as chamfered edges. Only the edges that extend in the release direction can be chamfered. Accordingly, the stop wall and the front end of the latching element can be configured without a chamfer.

[0022]In one example embodiment, the release wall of the latching element and/or of the receiving component can be configured to be inclined in the release direction. A configuration of the release wall as inclined surfaces in the release direction guides the movement of the latching element into the release position during the release movement.

[0023]According to one embodiment, the latching element can be subdivided along the locking direction into a first section and a second section, wherein the first section can be wider than the second section. The first section and/or the second section have a rectangular base area. Accordingly, the latching element has a base area that consists of a wider rectangular first section and a subsequent, narrower rectangular second section. According to another embodiment, the first section and the second section can be of equal width, each having a rectangular base area. The side surfaces of the rectangular sections can be configured as the chamfered release walls.

[0024]In one example embodiment, the latching element can be hinged orthogonally to the locking direction. This facilitates pivoting of the latching element during the locking of the closure elements to one another.

[0025]The first closure element and/or the second closure element comprise a spring element which, in the secured state, exerts a force component on the first closure element in the opposite direction and on the second closure element in the locking direction. The latching element can be, for example, pressed by the spring element in the direction of the stop wall, such that the latching element can be in secure contact in the receiving component and the closure elements can be securely held against each other. The spring element can be configured as part of the latching element or separately from the latching element. For example, the spring force of a latching element configured as a spring tab causes the force to be exerted on the first closure element in the opposite direction.

[0026]In one example embodiment, the fastening system comprises at least one pair of magnets that, in the locked state, exerts an attractive magnetic force between the first closure element and the second closure element. The pair of magnets comprises i two magnets or one magnet and a magnetizable body. In any case, the pair of magnets attracts each other in the locked state and thus additionally holds the closure elements against one another in the locked state. In one example embodiment, the fastening system comprises two pairs of magnets, which can be arranged to the left and right of the locking element and the receiving component.

[0027]According to one embodiment, the return element comprises the pair of magnets. The pair of magnets can be provided as the return element or as part of the return element. Accordingly, instead of configuring the latching element as a spring tab, a magnetic pivoting of the latching element may be provided. According to another embodiment, the pair of magnets can be configured to be separate from the return element.

[0028]According to one embodiment, at least one of the magnets of the pair of magnets comprises a magnetization direction that extends from a north pole to a south pole, wherein the magnetization direction extends substantially parallel to the release direction. The magnetization direction of the other magnet of the pair of magnets extends in a direction opposite to the magnetization direction of the first magnet. In this way, it can be ensured that, in the locked state, the magnets securely hold against one another. However, when the closure elements can be moved against one another along the release direction, the north poles and south poles of the magnets can be no longer oriented opposite to one another, but rather a north pole of the first magnet can be in opposition to a north pole of the second magnet or a south pole of the first magnet can be in opposition to the south pole of the second magnet. This generates a repulsive force between the closure elements, which facilitates the release of the closure elements from one another.

[0029]In one example embodiment, the first closure element or the second closure element can be secured or securable to a helmet, and the other closure element can be secured or securable to a helmet accessory. The helmet accessory is, for example, a visor, a lamp, headphones, a radio, or a similar accessory. The helmet can be a protective helmet.

[0030]The locking direction extends in a direction from the front toward the helmet. Accordingly, the accessory can be moved toward the helmet from the front in order to be secured to it. The release direction extends laterally along the circumference of the helmet, or rather of the head. Accordingly, the helmet accessory can be moved laterally in order to be removed, while releasing in the opposite direction, i.e., away from the helmet, can be prevented. The configuration of the release direction as a lateral direction has, inter alia, the advantage that, upon a lateral application of force to the accessory, the accessory can be released from the helmet without the force being transmitted at full intensity to the helmet and the user of the helmet. If the helmet accessory is, for example, a protective visor and the lateral force can be caused by a projectile or a blow impacting the protective visor, the visor detaches from the helmet without the head of the user being hurled sideways with the entire force of the projectile or blow. This prevents serious injuries to the user.

[0031]The object can be further achieved by a helmet comprising a helmet accessory and a fastening system according to one of the previously mentioned embodiments, wherein the helmet accessory can be releasably secured or securable to the helmet by means of the fastening system. The helmet embodies the same advantages, features and properties as the fastening system described above.

[0032]Furthermore, the object can be achieved by a method for locking and releasing a first closure element to and from a second closure element by means of a fastening system, according to one of the embodiments described above, wherein the first closure element can be moved relative to the second closure element along a locking direction, wherein an actuating force can be exerted, by means of a return element, on a latching element of the first closure element, wherein, as a result of the actuating force, the latching element can be pivoted in the direction of a receiving component of the second closure element and assumes a fixed position, wherein a stop wall of the receiving component of the second closure element limits a movement of the latching element and thus of the first closure element in an opposite direction such that the fastening system assumes a locked state, wherein the opposite direction can be opposite to the locking direction, wherein, in order to release the first closure element, the first closure element can be moved relative to the second closure element along a release direction such that a release wall of the latching element slides along a release wall of the receiving component in order to pivot the latching element out of the fixed position counter to the actuating force into a release position, wherein the release direction runs transversely to the locking direction.

[0033]The method embodies the same advantages, features, and properties as the fastening system described above and the helmet described above.

[0034]Further features of the disclosure will become evident from the description of embodiments according to the disclosure, together with the claims and the appended drawings. Embodiments according to the disclosure can fulfill individual features or a combination of multiple features.

[0035]Within the context of the disclosure, features which can be labeled with “in particular” or “preferably” can be to be understood to be optional features.

BRIEF DESCRIPTION OF THE DRAWINGS

[0036]The disclosure will be described below, without restricting the general concept of the disclosure, based on exemplary embodiments and with reference to the drawings, wherein reference is expressly made to the drawings regarding all of the details according to the disclosure which can be not explained in greater detail in the text. In the figures:

[0037]FIG. 1 shows a schematically simplified front view of a first closure element to which a visor is fastened,

[0038]FIG. 2 shows a schematically simplified view of the closure element and the visor from FIG. 1 from above,

[0039]FIG. 3 shows a schematically simplified view of the closure element and the visor from FIGS. 1 and 2 from below,

[0040]FIG. 4 shows a schematically simplified front view of a second closure element that is configured to be fastened to a helmet,

[0041]FIG. 5 shows a schematically simplified view of the closure element from FIG. 4 from above,

[0042]FIG. 6 shows a schematically simplified view of the closure element of FIGS. 4 and 5 from below,

[0043]FIG. 7 shows a schematically simplified illustration of a first closure element that is locked to a second closure element along a locking direction,

[0044]FIG. 8 shows a schematically simplified illustration of the locking process from FIG. 7 along the section line A: A,

[0045]FIG. 9 shows a schematically simplified illustration of the fastening system with the first closure element and the second closure element from FIG. 8 during the locking process,

[0046]FIG. 10 shows a schematically simplified illustration of the fastening system from FIGS. 8 and 9 in the locked state,

[0047]FIG. 11a shows a schematically simplified illustration of a fastening system with a first closure element and a second closure element, which can be disconnected from one another by movement along a release direction,

[0048]FIG. 11b to 11d show a schematically simplified cross-sectional view of the fastening system from FIG. 11a during different release states, and

[0049]FIG. 12 shows a schematically simplified illustration of a fastening system for fastening a helmet accessory to a helmet shell of a helmet.

[0050]In the drawings, the same or similar elements and/or parts are, in each case, provided with the same reference signs, and therefore they can be not introduced again in each case.

DETAILED DESCRIPTION

[0051]FIG. 1 shows, in a schematically simplified manner, a first closure element 10, by means of which a visor 40 can be releasably secured to a helmet (not shown). The closure element 10 can be secured to an upper edge of the visor 40.

[0052]In FIG. 2, the first closure element 10 and the visor 40 can be shown in a view from above. It can be apparent therefrom that the first closure element 10 has a substantially planar shape and that the upper side can be configured largely as a first contact surface 11. A latching element 12 can be arranged centrally in the first contact surface 11 and can be hinged to the first contact surface 11, as illustrated in FIG. 2 by a dashed line. In the embodiment shown, the latching element 12 comprises a wider first section 12a and a narrower second section 12b, which each have a substantially rectangular cross-section. According to another embodiment, the sections 12a and 12b may also be of equal width. The lateral edges of the latching element 12 can be configured as release walls 13, which have a beveled, or else chamfered, shape. This can be illustrated in FIG. 2 as dashed lines. While the rear end of the latching element 12 can be hinged to the first contact surface 11, the front end can be freestanding, such that the latching element 12 can be pivotably arranged. In the illustrated embodiment, the latching element 12 can be configured as a spring tab 12d, which can be lifted from the first contact surface 11 by virtue of its spring force, or rather actuating force. In this position protruding from the first contact surface 11, the latching element 12 assumes a so-called fixed position. If, by contrast, the latching element 12 can be pressed downward such that it can be recessed in the first contact surface 11, this position can be referred to as the release position.

[0053]A guide wall 17 projects upward from the front side of the first contact surface 11 and extends perpendicularly upward starting from the first contact surface 11. Two holding plates 14 project inward from this guide wall 17, and can be thus arranged above the first contact surface 11. The guide wall 17 likewise has, centrally, an inwardly projecting holding projection 15. Two magnets 16 can be additionally introduced into the first contact surface 11.

[0054]FIG. 3 shows the first closure element 10 in a view from below. In this view, the first latching element 12 can be also illustrated, which, in the illustrated embodiment, extends completely through the first contact surface 11. However, the latching element 12 may likewise be arranged in the first closure element 10 such that it can be not visible from the rear side. The visor 40 can be secured to the first closure element 10 by means of a visor mount 18. For example, two screws can be provided as part of the visor mount 18, and means of these screws the visor 40 can be screwed to the first closure element 10.

[0055]In FIG. 4, a second closure element 20 can be shown in a view from the front. The second closure element 20 comprises, on its underside, a second contact surface 21 that, in the locked state, can be in contact with the first contact surface 11 of the first closure element 10. On the front side of the second closure element 20, a guide wall 27 extends, which, in the locked state, can be in contact with the guide wall 17 of the first closure element 10. A guide groove 25, into which, in the locked state, the holding projection 15 of the first closure element 10 engages, can be introduced into the center of the guide wall 27. Likewise, two guide notches 24, into which the holding plates 14 engage, can be arranged on both sides of the second closure element 20. The side edges of the guide notches 24 can be configured to be beveled, which can be illustrated in FIG. 4 by dashed lines. The guide wall 27 can be elongated upwardly in the center and there forms a helmet mount 29. This helmet mount 29 can be secured, for example, to an inner side or an outer side of the helmet shell of the helmet.

[0056]FIG. 5 shows the second closure element 20 in a view from above. In this view, it can be seen that the second closure element 20 has two magnets 26 which can be configured symmetrically and, in the locked state, can be positioned directly above the magnets 16 of the first closure element 10. The pairs of magnets 16, 26 configured in this way hold the closure elements 10, 20 against one another. In addition, it can be apparent in FIG. 5 that the guide notches 24 can be configured wider than the holding plates 14 and thus permit movement of the holding plates 14 in the guide notches 24.

[0057]FIG. 6 shows the second closure element 20 in a view from below. In this view, a receiving component 22 can be seen, which can be configured as a recess in the second contact surface 21 on the underside of the second closure element 20. The receiving component 22 can be configured to be at least partially complementary in shape to the latching element 12. When the closure elements 10, 20 can be moved into the locked state, the latching element 12 moves from the release position into the fixed position as a result of the spring force such that the latching element 12 enters into the receiving component 22. The side walls of the receiving component 22 can be at least partially configured as release walls 23, which can be likewise configured as beveled, or else chamfered, edges. This can be illustrated by dashed lines. Due to the release walls 13, 23, upon a lateral movement of the closure elements 10, 20 against one another, the latching element 12 can be released from the receiving component 22 and moved from the fixed position into the release position.

[0058]FIG. 7 shows, in a schematically simplified manner, a fastening system 2 comprising the first closure element 10 and the second closure element 20. The visor 40 can be not illustrated in FIG. 7 for the sake of clarity. In FIG. 7, the closure elements 10, 20 can be disconnected from one another. Due to a movement of the first closure element 10 along a locking direction 50 toward the second closure element 20, the first closure element 10 can be locked to the second closure element 20. This can be the case, for example, when the visor 40 that can be secured to the first closure element 10 can be intended to be fastened to a helmet to which the second closure element 20 can be secured.

[0059]FIG. 8 shows an illustration of the locking movement from FIG. 7 in a cross-sectional view along the axis A: A. In contrast to FIG. 7, however, the closure elements 10, 20 have already been moved significantly closer to one another for reasons of clarity. In FIG. 8, it can be seen that the latching element 12, which can be configured as a spring tab 12d, can be pivoted upward out of the first contact surface 11 in the rest state and assumes the fixed position. By means of a flexure bearing 12c, which acts as a return element 19, a spring force, or rather an actuating force, can be exerted on the spring tab 12d when it moves out of the fixed position. It can be also apparent in FIG. 8 that the receiving component 22 can be configured as a recess in the second closure element 20 and that the stop wall 22a can be a front wall of the recess.

[0060]FIG. 9 shows the fastening system from FIG. 8, wherein the first closure element 10 has already been partially pushed under the second closure element 20. Due to the movement of the first closure element 10 along the locking direction 50, the first contact surface 11 moves along the second contact surface 21. As a result, the latching element 12 can be pressed downward counter to the actuating force 55, which acts in a contact direction 52, and assumes a release position there. As a result, the first contact surface 11 and the second contact surface 21 can be readily moved against one another along the locking direction 50. Due to this movement, the holding projection 15 can be additionally introduced into the guide groove 25 and thereby prevents movement of the closure elements 10, 20 against one another along the contact direction 52.

[0061]FIG. 10 shows the fastening system of FIGS. 8 and 9 in the locked state. In this locked state, the holding projection 15 can be positioned completely in the guide groove 25, and the guide wall 17 of the first closure element 10 can be in contact with the guide wall 27 of the second closure element 20. Due to the actuating force 55, the latching element 12 moves upward in the contact direction 52 into the receiving component 22 of the second closure element 20. As a result, a release of the first closure element 10 from the second closure element 20 in an opposite direction 51, which extends counter to the locking direction 50, can be prevented. The stop wall 22a prevents movement of the latching element 12 in the opposite direction 51 and thereby prevents movement of the entire first closure element 10, such that the closure elements 10, 20 of the fastening system 2 can be securely in contact with one another. It can be not illustrated in FIG. 10 that, in the locked state, the magnets 16, 26 in two pairs of magnets can be positioned one above the other and hold the closure elements 10, 20 securely against one another. Furthermore, the holding plates 14 can be positioned in the guide notches 24, which can be likewise not visible in the selected cross-sectional view.

[0062]FIG. 11a shows, in a schematically simplified manner, a release process for releasing the first closure element 10 from the second closure element 20 of the fastening system 2. In the illustration shown, the closure elements 10 can be positioned one above the other. In order to release the elements, the first closure element 10 can be moved, relative to the second closure element 20, along an arcuate release direction 53 or in an opposite direction. The direction of movement of the release movement can be defined by the arcuate guide walls 17, 27. To this end, the arcuate guide wall 17 of the first closure element, as shown for example in FIG. 1 to 3, moves along the arcuate guide wall 27, as shown for example in FIGS. 4 and 5. Additionally, the holding projection 15 and the guide groove 25, as well as the holding plates 14 and the guide notches 24, support movement in the release directions 53, since they largely prevent movement in other directions. As a result of the movement in the release direction 53, the pairs of magnets 16, 26 can be no longer positioned one above the other and thus no longer hold the closure elements 10, 20 against one another. Additionally, due to the movement in the release direction 53, the release walls 13 of the latching element 12 can be moved along the release walls 23 of the receiving component 22. This can be shown in FIGS. 11b, 11c and 11d. These figures each show a cross-sectional view in the locking direction 50 through the closure elements 10, 20 in contact with one another in different positions. In the fixed position shown in FIG. 11b, the magnets 16, 26 can be still positioned one above the other. Furthermore, the second section 12b of the latching element 12 can be pivoted upward and can be positioned in the receiving component 22 configured as a recess, as already illustrated in FIG. 10 from another perspective. It can be seen in FIG. 11b that the beveled, or else chamfered, release walls 13 of the latching element 12 can be in contact with the likewise beveled, or else chamfered, release walls 23 of the second closure element. Since the release walls 13, 23 can be each configured to be beveled, or else chamfered, the latching element 12 can be pressed downward in the release direction 53 by the movement of the second closure element 20 relative to the first closure element 10, as shown in FIG. 11c. Finally, the latching element 12 can be positioned completely beneath the second contact surface 21 of the second closure element 20 and thereby moves into the release position, as shown in FIG. 11d. In this release position, the latching element 12 can be released from the receiving component 22. In this manner, the visor 40 can be released from the helmet without difficulty by movement along the release direction 53, while at the same time unintentional removal of the visor 40 can be largely prevented. Accordingly, the release direction 53 specified by the fastening system 2 differs from the locking direction 50 and the opposite direction 51.

[0063]FIG. 12 shows a further embodiment of a fastening system 2 for securing a helmet accessory 45, which, in the embodiment shown, can be a lamp 44, to a helmet 42. The lamp 44 can be secured to the first closure element 10, which can be clamped to the outside of the helmet shell of the helmet 42. The second closure element 20 can be fixedly secured to the helmet shell of the helmet 42. The first closure element 10 comprises, at its lower end, two latching elements 12, on each of which magnets 16 can be arranged. The magnets 16 can be attracted by magnets of the second closure element 20, which can be concealed in FIG. 12, and pivoted in the direction of the helmet shell such that the latching elements 12 can be introduced into the receiving components 22 of the second closure element 20 when the first closure element 10 can be secured to the second closure element 20 in the locking direction 50. A spring element 31 of the first closure element 10, which can be in contact with a spring element 32 of the second closure element 20, exerts, in the locked state, a force component in an opposite direction 51 on the first closure element 10 in order to secure it to the second closure element 20. The stop walls 22a of the receiving components 22 prevent the first closure element 10 from being released from the second closure element 20 by the force component in the opposite direction 51. In order to release the closure elements 10, 20 from one another, they can be instead moved against one another in the release direction 53. By means of the release walls 13, 23 (not shown in FIG. 12) of the latching elements 12 and of the receiving components 22, respectively, the latching elements 12 can be released from the receiving components 22 upon a movement in the release direction 53, such that the first closure element 10 can be released from the second closure element 20 and thus the lamp 44 can be released from the helmet 42.

[0064]All of the indicated features, including those which can be to be inferred from the drawings alone, and individual features which can be disclosed in combination with other features, can be deemed to be essential to the disclosure both alone and in combination.

[0065]Embodiments according to the disclosure can be fulfilled by individual features or a combination of multiple features.

LIST OF REFERENCE SIGNS