Compressible protective helmet and method for compressing a protective helmet

Abstract

A protective helmet with a ring segment and a roof segment separate from the ring segment is proposed, wherein the protective helmet can be brought from a wearing state, in which the protective helmet can be placed on a head and provides a safety function for the user, into a transport state in which the protective helmet is compressed compared to the wearing state. The ring segment and the roof segment can be connected to one another by means of a flexible connecting element. The roof segment can be placed on the ring segment in a wearing position and arranged within the ring segment in a transport position. The protective helmet can have a head ring that is adjustable in the axial direction for fixing the protective helmet on the head of a user. The protective helmet can have an adjustable neck strap that is arranged in a safety position for resting on the head of a user and is arranged within the ring segment in a passive position.

Description

The present invention relates to a compressible protective helmet according to the preamble of claim 1 and to a method for compressing a protective helmet.Protective helmets are used to protect the head during operations with an increased risk for head injuries. Thus, for example, in the working right, the wearing of a protective helmet is prescribed during certain activities. The support of protective helmets is also partially prescribed in various sports such as bicycling, climbing, skiing, icehokey and motorcycling, or has been spread on a involuntary basis for protection purposes.Conventional protective helmets are generally formed in one piece, as a result of which a large space requirement is required during transport and storage. In order to simplify the transport of the protective helmet, for example when shopping after a bicycle drive, a protective helmet is known from DE 20 2004 012 285 U1, which has three convexly curved helmet parts, which are arranged one behind the other in the viewing direction of the user when wearing the protective helmet. The helmet parts are connected to one another via a joint and can be pivoted into one another, so that the helmet parts are arranged one above the other. In this way, the protective helmet can be compressed.From ES 1 243 805 U and WO 2017 / 130 356 A1, further protective helmets are known which can be compressed in different ways.Corresponding protective helmets have a complex structure in order to enable the kinematics of the helmet parts relative to one another. At the same time, complicated and expensive locking mechanisms must be provided in order to be able to fix the helmet parts to one another, so that a user is sufficiently protected when wearing the protective helmet.The object of the present invention is to specify an improved protective helmet and an improved method for compressing a protective helmet, wherein a simple, cost-effective and at the same time particularly stable structure and / or a manifold possible use is created, wherein the protective helmet is compressible in a particularly simple manner.The object underlying the invention is achieved by a compressible protective helmet according to claim 1 or a method according to claim 12. Advantageous refinements are the subject matter of the dependent claims.The proposed protective helmet has a head protection element which extends along a placement axis. The head protection element has a ring segment along the placement axis and a roof segment separate from the ring segment.The protective helmet has a fit device which enables the protective helmet to be reliably fastened to the head of a user. Due to the fit device, the shape of the head protection element, in particular the inner side of the head protection element, does not have to be adapted to the size of the user's head.The protective helmet can be brought from a wearing state in which the protective helmet can be placed on a head and provides a safety function for the user into a transport state in which the protective helmet is compressed with respect to the wearing state. The protective helmet can then be transported and / or stored in a particularly simple and space-saving manner.According to one aspect of the present invention, the ring segment and the roof segment are connected to one another by means of a flexible connecting element. The flexible connecting element can achieve a particularly pronounced mobility between the ring segment and the roof segment, as a result of which the protective helmet can be compressed in a particularly simple manner.The ring segment and the roof segment can be connected to one another by means of a flexible strip, as a result of which a cost-effective and secure connecting element for connecting the ring segment to the roof segment can be realized.According to a further aspect of the present invention, which can also be realized independently, the ring segment extends along a ring segment axis from a receiving opening for receiving the head of a user as far as an access opening. The roof segment has a supporting position in which the roof segment is placed on the ring segment in the region of the transition opening in such a way that the roof segment adjoins the ring segment in the axial direction-i.e. along the placement axis.The roof segment can be brought from the supporting position into a transport position in which the roof segment is arranged within the ring segment. The roof segment can thus be arranged within the ring segment, whereby a particularly small space requirement can be achieved in the transport position or in the transport state. The transport and storage of the protective helmet can be simplified due to the small space requirement.Particularly preferably, the roof segment can be moved from the support position into the transport position within the scope of a rotational and / or pivoting movement of at least substantially 360°.According to a further aspect of the present invention, which can also be realized independently, the fit device has a head ring for fastening and / or for bearing the protective helmet on the head, in particular on the head periphery, of the user. The head ring has a carrying position in which the head ring is at a first distance from the receiving opening. Starting from the carrying position, the head ring can be brought into a transport position in which the head ring is at a second distance from the receiving opening, wherein the second distance is greater than the first distance. In this way, the free volume within the ring segment can be adapted to the roof segment to be accommodated. Thus, the head ring can be spaced further from the receiving opening in order to increase the free volume within the ring segment in a region close to the receiving opening. The roof segment can then be arranged in a particularly simple and secure manner within the ring segment.The head ring is preferably pivotable about a pivot axis relative to the head protection element, in particular relative to the ring segment. The pivot axis can be arranged at least substantially perpendicular to the placement axis.According to a further aspect of the present invention, which can also be realized independently, the fit device has a neck strap, wherein the neck strap has a safety position in which the neck strap is oriented for contact in the region of the back head of the user and / or is arranged at least in sections outside the ring segment. The neck strap can be brought from the safety position into a passive position in which the neck strap is arranged within the ring segment. In this way, the neck strap does not project beyond the ring segment in the transport state of the protective helmet, whereby the space requirement can be kept particularly low.In particular, the neck strap is pivotably connected to the head protection element and / or the ring segment.In order to produce an axial and / or radial securing or fixing between the ring segment and the roof segment, one component of the ring segment and the roof segment preferably has at least one projection and the other component has a corresponding recess. In the supporting state, the projection preferably engages in the recess in such a way that the roof segment is fixed relative to the roof segment in the radial and / or axial direction.Preferably, the protective helmet comprises a locking system. With the aid of the locking system, the ring segment and the roof segment can be fixed to one another, in particular in a detachable manner, in the supporting state of the protective helmet. The fixing between the ring segment and the roof segment can then be produced in a particularly simple manner and can be released again if necessary, in particular for transport purposes.The head ring preferably has at least one head ring element and at least one flexible intermediate element for connecting adjacent ends of the at least one head ring element. In particular, the head ring can have at least two head ring elements and at least two flexible intermediate elements, wherein a flexible intermediate element connects mutually facing ends of two adjacent head ring elements.Furthermore, a method for compressing a protective helmet according to the proposal is proposed.According to one aspect of the present invention, the roof segment is brought into the transport position starting from the carrying position by means of a rotational and / or pivoting movement through at least substantially 360°, whereby a movement which is particularly easy to carry out between the roof segment and the ring segment is realized for compressing the protective helmet.According to a further aspect of the present invention, which can also be realized independently, the head ring is brought into the transport position starting from the carrying position by means of a rotational and / or pivoting movement of at least 150°. In this way, a transition of the head ring from the carrying position into the transport position can be achieved in a particularly simple manner.According to a further aspect of the present invention, which can also be realized independently, the neck strap is moved from the safety position into the passive position by means of a rotational and / or pivoting movement of at least 10°. The transfer of the neck strap into the passive position can then be carried out in a particularly simple manner.The aforementioned aspects and features and the aspects and features of the present invention resulting from the claims and the following description can be realized in principle independently of one another, but also in any combination.Further aspects, advantages, features, properties and advantageous refinements of the present invention are evident from the claims and the following description of a preferred embodiment on the basis of the figures. They are shown in schematic illustration, not to scale: FIG. 1 shows a schematic view of a protective helmet according to the proposal in a supporting state with a ring segment and a roof segment; FIG. 2 shows a schematic view of the protective helmet from FIG. 1, wherein the roof segment is pivoted relative to the ring segment; FIG. 3 shows a schematic view of the protective helmet from FIG. 1 in a transport state; FIG. 4 is a schematic view of the protective helmet of FIG. 1 with a fitting device and a head ring located in a supporting position; FIG. 5 shows a schematic view of the protective helmet from FIG. 1, wherein the head ring is in a transport position; FIG. 6A shows a portion of a head ring of the fitting device in the supporting state of the protective helmet in a view from the front; FIG. 6B shows a section of a head ring of the fitting device in the supporting state of the protective helmet in a cross-sectional view; FIG. 7A shows the section of the head ring from FIG. 6A in the transport state of the protective helmet in a view from the front;FIG. 7B shows the portion of the head ring from FIG. 7A in the transport state of the protective helmet in a cross-sectional view; FIG. 8A shows a detail view of a locking element of the protective helmet from FIG. 1 in a front view; FIG. 8B shows a detail view of the locking element from FIG. 8A in a side view; and FIG. 8C shows a detailed view of the locking element from FIG. 8A in a view from above.In the only schematic figures, which are not to scale in part, the same reference numerals are used for identical, similar or similar components and components, wherein corresponding or comparable properties or advantages are achieved, even if repetition is omitted.FIG. 1 shows a protective helmet 1 according to the proposal in a side view, wherein the protective helmet 1 has a wearing state and is worn on the head by a user.The protective helmet 1 is designed to protect the head of a user from injuries, for example from falling objects and / or in the event of falling of the user.The protective helmet 1 has a head protection element 2 which, in the mounted state, surrounds the head of a user at least partially.The term "fitted state" is to be understood within the scope of the present invention preferably as the state in which the protective helmet 1 is worn on the head by a user.The head protection element 2 in the worn state preferably has a shell-like shape which at least partially accommodates the user's head.In particular, the protective helmet 1 or the head protection element 2 covers or surrounds the uppermost section of the head starting from the forehead, the temples and / or the back head. In particular, the forehead, temples and / or the back head is or are also surrounded at least in sections by the head protection element 2 in the mounted state.The head protection element 2 extends, preferably starting from a receiving opening 3 for receiving the head of a user, along a geometric placement axis A, as shown in FIG. 1. The protective helmet 1 can be placed on the head in particular by means of a linear placement movement along the placement axis A.The head protection element 2 preferably has a ring segment 4 and a roof segment 5 separate from the ring segment 4.The terms "radial", "axial", "circumferential" and / or "circumferential direction" are always referred to the placement axis A within the scope of the present invention, unless stated otherwise.The ring segment 4 preferably extends starting from the receiving opening 3 along a ring segment axis R as far as an transition opening 6, as shown in FIG. 2.The ring segment axis R and the placement axis A are preferably aligned parallel to one another, in particular coaxially.The ring segment 4 is preferably formed so as to be completely circumferential with respect to the ring segment axis R. The ring segment 4 preferably encloses a cavity in the radial direction for receiving the head of a user.The roof segment 5 preferably extends along a roof segment axis D.The roof segment 5 preferably has a shell-like shape.In the mounted state, the roof segment 5 preferably adjoins the ring segment 4 in the axial direction, in particular directly.Preferably, the transition opening 6 is at least partially covered by the roof segment 5 in the worn state.In the supported state, the roof segment axis D is preferably arranged parallel, in particular coaxial to the placement axis A and / or to the ring segment axis R.In the worn state, a portion of the user's head may be positioned within the roof segment 5. The roof segment 5 then preferably surrounds a region of the head.The head protection element 2 or the ring segment 4 and / or the roof segment 5 can be constructed in multiple layers. Thus, the ring segment 4 and / or the roof segment 5 can have an outer or outer layer made of a first material and an inner or inner layer made of a second material. The ring segment 4 and / or the roof segment 5 can, however, also be of single-layer configuration.In particular, the outer layer can be harder than the inner layer. The energy can be distributed particularly well via a hard outer layer in the event of a shock. Due to the less hard material of the inner layer, a particularly high amount of energy can be absorbed by a deformation of the inner layer.Thus, the outer layer can be manufactured, for example, from a metal or from an, in particular thermoplastic, plastic, such as polyamide, polycarbonate, or the like. Other materials, in particular plastic materials, are also possible.The inner layer can consist of a foamed material, in particular plastic. For example, the inner layer may be made of polystyrene. The use of other materials is also possible.The protective helmet 1 preferably has a wearing state in which the protective helmet 1 is fittable on a head and provides a safety function for the user. The supporting state of the protective helmet is shown in FIG. 1. The protective helmet 1 thus has the wearing state in the worn state.Starting from the supporting state, the protective helmet 1 can preferably be brought into a transport state in which the protective helmet 1 is compressed with respect to the supporting state. The supporting state is shown in FIG. 3.The term "compressed" is to be understood in particular within the scope of the present invention that the protective helmet has a smaller extension in at least one spatial direction or dimension in the worn state than in the worn state.The outer contour of the protective helmet 1 can include a smaller total volume in the transport state than in the carrying state.As FIG. 3 shows, the protective helmet 1 in the transport state has in particular a smaller axial extension than in the carrying state. The outer dimensions of the protective helmet 1 in the transport state preferably correspond to the outer dimensions of the ring segment 4.The extent of the ring segment 4 in the axial direction with respect to the ring segment axis R is preferably less than 10 cm, more preferably less than 9 cm, more preferably less than 8 cm, preferably less than 7 cm or at least substantially 7 cm, whereby a particularly compact outer shape of the protective helmet 1 can be realized in the transport state.It is preferably provided that the roof segment 5 has a smaller extension in the axial direction with respect to the roof segment axis D than the ring segment 4 in the axial direction with respect to the ring segment axis R, as is shown in the figures. However, it is also possible for the axial extent of the roof segment 5 to correspond to the axial extent of the ring segment 4. Alternatively, the axial extension of the roof segment 5 can also be greater than the axial extension of the ring segment 4.In particular, the ring segment 4 has a free volume, wherein the roof segment 5 can be arranged at least partially, in particular completely, within the free volume.The term "free volume" is preferably to be understood as meaning the free space between the radially encircling ring segment 4 in the radial direction and the free space in the axial direction between the receiving opening 3 and the transition opening 6.It is then possible to arrange the roof segment 5 at least partially, in particular completely, within the ring segment 4 in the transport state, as will be explained in the following. In this way, a particularly small space requirement can be achieved. In the transport state, the required transport and storage dimensions for the protective helmet 1 can be kept particularly small.As FIG. 2 shows, the ring segment 4 and the roof segment 5 are connected to one another by means of a flexible connecting element 7. The flexible connecting element 7 is in particular strip-shaped and / or strip-shaped.In the supporting state, the connecting element 7 preferably serves for fixing between the ring segment 4 and the roof segment 5.Particularly preferably, the flexible connecting element 7 is designed as a flexible band. Thus, the flexible band can be formed by a textile planar structure, for example a woven fabric, laid scrim or the like. The flexible connecting element 7 or the flexible strip can also be formed from leather, in particular as a leather belt, or the like.The connecting element 7 is preferably fastened to the outer side or a region of the outer side of the ring segment 4 and / or of the roof segment 5. The connecting element 7 can be connected to the ring segment 4 and / or the roof segment 5 in a form-fitting, force-fitting and / or firmly bonded manner. Thus, the flexible connecting element 7 can be fastened to the ring segment 4 and the roof segment 5 by means of a rivet connection in each case, wherein other connecting techniques are also possible.In particular, it is provided that the connecting element 7 and / or the connection between the connecting element 7 and the ring segment 4 and / or the roof segment 5 has a higher mechanical strength than the ring segment 4 and / or the roof segment 5.The roof segment 5 preferably has a circumferential connecting section 8 for connecting to the ring segment 4 in the supporting state. The connecting section 8 is preferably arranged at the axial end facing the ring segment 4 in the supporting state. The flexible connecting element 7 is preferably connected to the roof segment 5 by one end in the region of the connecting section 8 or is fastened to the latter.The ring segment 4 preferably has a central extension region 9. The central extension region 9 is arranged in the axial direction in the middle of the ring segment 4 and corresponds to at least one third and / or less than two thirds of the axial extension of the ring segment 4. Preferably, the connecting element 7 is fastened centrally on the ring segment 4 in the axial direction.The ring segment 4 and / or the roof segment 5 preferably has or have an outer depression section 10 which is formed in such a way that the flexible connecting element 7 does not project outwards beyond the outer contour of the ring segment 4 and / or of the roof segment 5 in the supporting state. As FIG. 1 shows, the flexible connecting element 7 does not project outwards beyond the head protection element 2 or the ring segment 4 or the roof segment 5 in the wearing state, whereby a particularly attractive appearance of the protective helmet 1 is achieved in the wearing state.By fastening the flexible connecting element 7 to the ring segment 4 and the roof segment 5, the protective helmet 1 can be compressed in a particularly simple manner during the transition from the wearing state to the transport state, as will be explained in more detail below.In the supporting state of the protective helmet 1 shown in FIG. 1, the roof segment 5 preferably has a supporting position in which the roof segment 5 is placed on the ring segment 4 in the region of the transition opening 6 in such a way that the roof segment 5 adjoins the ring segment 4 in the axial direction. In particular, the roof segment 5 and the ring segment 4 are fixed to one another in the axial and / or radial direction in the supporting position.Starting from the supporting position, the roof segment 5 can preferably be brought into a transport position shown in FIG. 3, in which the roof segment 5 is arranged within the ring segment 4.The term "within the ring segment" is preferably understood within the scope of the present invention to mean that the roof segment 5 is arranged at least substantially between the receiving opening 3 and the transition opening 6 in the axial direction. In particular, the roof segment 5 is arranged at least substantially completely within the ring segment 4 in the transport position.The term "complete" is to be understood within the scope of the present invention that the roof segment 5 does not project outward-neither in the axial nor in the radial direction-beyond the ring segment 4 in the supporting position.FIG. 2 shows a transition state between the carrying position shown in FIG. 1 and the transport position of the roof segment 5 shown in FIG. 3.As the overview of FIGS. 1 to 3 shows, the roof segment 5 can preferably be moved from the supporting position into the transport position within the scope of a rotational and / or pivoting movement (arrow X in FIG. 2 ) of at least substantially 360°.As FIG. 3 shows, the ring segment 4 preferably has at least one radially inwardly directed retaining projection 11 for retaining and / or fixing the roof segment 5 within the ring segment 4 in the transport position or in the transport state. The roof segment 5 can be brought into engagement with the retaining projection 11 in such a way that the roof segment 5 is held by the retaining projection 11 in particular captive within the ring segment 4. In this way, an undesired relative movement between the ring segment 4 and the roof segment 5 in the transport state of the protective helmet 1 can be avoided and / or limited.As FIG. 3 further shows, the roof segment 5 is positively held in the axial direction upward in the transport position. In particular, the roof segment 5 cannot be guided through the transition opening 6 in the transport position. The roof segment 5 is preferably held in the downward axial direction by the holding projection 11.The holding projection 11 can be flexibly deformable in order to hold the roof segment 5 in the ring segment 4 in a simple manner, in particular in a clamping manner. The holding projection 11 can be made of foam, for example.The protective helmet 1 can have more than one retaining projection 11 in order to retain or fix the roof segment 5 in the transport position within the ring segment 4 in a particularly reliable manner.As FIG. 2 shows, one component of ring segment 4 and roof segment 5 preferably has at least one projection 12 and the other component has a corresponding recess 13. The recess 13 is preferably formed complementary to the projection 12.In the supporting state, the projection 12 preferably engages in the recess 13 in such a way that the roof segment 5 is fixed or held in the radial and / or axial direction relative to the ring segment 4.The projection 12 preferably extends at least in sections in the axial direction. The recess 13 preferably also extends at least in sections in the axial direction.The projection 12 can have a radial, in particular radially outward-directed, holding section 14. The radial holding section 14 can engage behind a material projection of the recess 13 in the supporting state of the protective helmet 1 or in the supporting position of the roof segment 5, as a result of which, in addition to the radial fixing, axial fixing between the roof segment 5 and the ring segment 4 can also be realized.The protrusion 12 can thus have an at least substantially L-shaped longitudinal section, as is shown in FIG. 2 with respect to the right protrusion 12.By means of the interaction between the projection 12 and the recess 13, an additional securing or fixing between the ring segment 4 and the roof segment 5 in the supporting state of the protective helmet 1 can be realized in a particularly simple manner.The roof segment 5 preferably has the projections 12 and the ring segment 4 has the recesses 13. A reverse arrangement of the projections 12 and recesses 13 is also possible.In the embodiment shown in the figures, a total of eight projections 12 and eight recesses 13 are provided, wherein a different number of projections 12 and recesses 13 is also possible.The projections 12 are preferably evenly distributed in the circumferential direction and / or arranged equidistantly with respect to one another. However, it is also possible to provide varying distances between individual projections 12. The recesses 13 are arranged in particular complementary to the projections 12.As FIG. 4 shows, the projections 12 are arranged within the ring segment 4 in the transport position of the roof segment 5 and do not project beyond the ring segment 4 to the outside. In this way, it can be ensured that the projection 12 cannot be damaged in the transport state or in the transport position. At the same time, it can be prevented that the projection 12 projects outwards in the transport state and a user can stick to it and / or damage it.As FIG. 2 shows, the projections 12 preferably extend in the axial direction with respect to the roof segment axis D. Preferably, a projection 12, in particular a projection 12 arranged in the region of the flexible connecting element 7, has the holding section 14. The other projections 12 preferably have only an at least substantially axial extension and / or no holding section 14. In this way, an axial securing between the roof segment 5 and the ring segment 4 can be realized, wherein at the same time a change of the roof segment 5 from the support position into the transport position and vice versa can be carried out in a particularly simple manner. Alternatively, it is also possible for more than one projection 12 to have a holding section 14.As FIG. 2 furthermore shows, one component of ring segment 4 and roof segment 5 preferably has an, in particular circumferential, protrusion 15 and the other component has a receiving recess 16 of complementary design, in particular circumferential. The protrusion 15 preferably engages in the receiving recess 16 in the supporting position of the roof segment 5 or in the supporting state of the protective helmet 1, whereby an additional fixing in the radial direction between the ring segment 4 and the roof segment 5 is achieved.The protrusion 15 and the receiving recess 16 preferably extend at least substantially in the axial direction.As FIG. 2 shows, the ring segment 4 preferably has the protrusion 15 and the roof segment 5 has the receiving recess 16, wherein a reversed arrangement is also possible.By engaging the protrusion 15 in the receiving recess 16, the penetration of dirt into the interior of the protective helmet 1 can be prevented.As FIG. 1 shows, the protective helmet 1 preferably has a fit device 17 for reliably and securely fastening the protective helmet 1 to the head of the user. The fit-in device 17 is configured in particular to fix the protective helmet 1 on the head of the user in such a way that the protective helmet 1 does not slip and is held fixed in position on the head of the user in the event of a fall of the user and / or in the event of objects falling down onto the protective helmet 1.In particular, the fit device 17 makes it possible to make the inner volume of the head protection element 2 or of the ring segment 4 and of the roof segment 5 larger than the user's head and independent of the shape of the user's head. Thus, the protective helmet 1 can be fastened to the head in a reliable and secure manner by means of the fit device 17, regardless of the size and shape of the user's head.The internal dimensions of the head protection element 2 or of the ring segment 4 and of the roof segment 5 then need not be adapted to the size and shape of the user's head, but can be designed to be larger.The ring segment 4 and the roof segment 5 can be adapted in such a way that the roof segment 5 can be arranged within the ring segment 4 in the supporting state.The fit device 17 preferably has a chin strap 18 for fixing the protective helmet 1 to the chin and / or to the lower jaw of the user. The chin strap 18 is preferably divided at its two ends into two connecting straps 19 each, which are connected to the head protection element 2, in particular the ring segment 4, thereby creating a 4-point connection between the chin strap 18 and the head protection element 2. In this way, the protective helmet 1 can be fixed on the user's head in a particularly secure manner.The fit device 17 preferably has a head ring 19 for fastening and / or for bearing the protective helmet 1 on the head, in particular on the head periphery, of the user. The head ring 19 is thus designed in particular for bearing against the head, in particular in the region of the forehead, the temples and the back head.Within the scope of the present invention, the term "head periphery" is understood to mean a horizontal extension in the circumferential direction around the head of a user substantially in a range of more than 0.5 cm, more preferably of more than 1 cm, and / or less than 4 cm, more preferably of less than 3.5 cm, more preferably of less than 3 cm, above the eye brows.In FIGS. 1 and 4, the head ring 19 is shown in a supporting position, in which the head ring 19 is at a first distance from the receiving opening 3. Starting from the carrying position, the head ring 19 can be brought into a transport position (FIG. 5 ) in which the head ring 19 is at a second distance from the receiving opening 3, wherein the second distance is greater than the first distance.As can be seen from the overview of FIGS. 4 and 5, the head ring 19 is spaced further from the receiving opening 3 in its carrying position than in the transport position.In the carrying position, a comfort side 21 of the head ring 19 preferably faces the placement axis A or the ring segment axis R. In the mounted state, the comfort side 21 preferably abuts against the head, in particular in the region of the head circumference, of the user.FIG. 5 shows the head ring 19 in the transport position in which the comfort side 21 faces away from the placement axis A or ring segment axis R. The comfort width 21 then preferably faces the ring segment 4.The head ring 15 is preferably pivotable relative to the ring segment 4 about a pivot axis S. In particular, the head ring 15 is pivotably connected to the ring segment 4 or pivotably fastened to the ring segment 4.The pivot axis S is preferably arranged at least substantially perpendicular to the ring segment axis R or to a plane having the ring segment axis R.The head ring 19 is preferably connected to the head protection element 2, in particular the ring segment 4, by means of at least two connecting parts 20, as shown in FIGS. 1 and 4.The connecting part 20 can have damping properties in order to be designed as an additional damper between the head ring 19 and the head protection element 2 in the event of shock loads.In FIGS. 6A to 7B, a section of the head ring 19 is shown, each with a connecting part 20. The head ring 19 is preferably pivotable relative to the connecting part 20 about the pivot axis S.In Figs. 6A and 6B, the head ring 19 is shown in its supporting position. By pivoting the head ring 19 relative to the connecting part 20 or to the ring segment 4 by preferably more than 90° more preferably by more than 120° more preferably by more than 135° and / or by less than 180°, the head ring 19 is pivotable into the transport position shown in FIGS. 7A and 7B.In the embodiment shown in the figures, the protective helmet 1 preferably comprises exactly six connecting parts 20, wherein a different number is also possible.Due to the axial offset of the head ring 19 relative to the receiving opening 3 in the transport position relative to the support position, more space for the roof segment 5 can be created within the ring segment 4.As shown in FIGS. 6A to 7B, the head ring 19 comprises at least one head ring element 22 and at least one flexible intermediate element 23 for connecting adjacent ends of the at least one head ring element 22.The flexible intermediate element 23 allows the swivel movement of the head ring 19 from the carrying position into the transport position and vice versa to be carried out in a particularly simple manner.The flexible intermediate element 23 is preferably designed as a flexible band. In particular, the intermediate element 23 is stretchable and / or toric. When the head ring 19 is transferred from the carrying position into the transport position and vice versa, the intermediate element 23 can be deformed and / or stretched, whereby the pivoting of the head ring 19 about the pivot axis S is simplified.The flexible intermediate element 23 is preferably more flexible than the head ring element 22.In particular, the head ring element 22 is not deformed or is deformed to a lesser extent than the flexible intermediate element 23 when the head ring 19 is pivoted.The head ring member 22 may be made of plastic.The head ring 19 can have at least two head ring elements 22 and at least two flexible intermediate elements 23, wherein a flexible intermediate element 23 connects mutually facing ends of two head ring elements 22.In particular, the head ring elements 22 and the intermediate elements 23 are arranged alternately in the circumferential direction.In the embodiment shown in the figures, the head ring 19 has exactly four head ring elements 22 and four flexible intermediate elements 23, as a result of which pivoting of the head ring 19 from the carrying position into the transport position and vice versa can be carried out particularly easily.The circumference of the head ring 19 is preferably adjustable. For this purpose, a latching mechanism can be provided, for example, in order to be able to fix the head ring 19 at a set circumferential dimension. The head ring 19 can then be easily adapted to heads of different sizes.The fit device 17 preferably has a holding structure 24 for bearing against the user's head, in particular skull roof, wherein the holding structure 24 has at least two elastic straps 25. The elastic bands 25 are preferably connected at both ends to the ring element 4, in particular to the connecting part 20. The bands 25 preferably cross each other, in particular in the apex region.Within the scope of the present invention, the term "crown area" is preferably to be understood as the area of the sagittal plane of the user's head and / or of the protective helmet 1 in the worn state.The retaining structure 24 allows the protective helmet 1 to be held or fixed in a particularly reliable manner relative to the user's head in the axial direction, thereby enabling a flexible adaptation to the shape of the head.In the embodiment shown in the figures, it is provided that the holding structure 24 has three belts 25. In particular, the bands 25 cross each other in the apex region.It is also possible for the holding structure 24 to have a shell-shaped, flexible or non-flexible bearing element for bearing against the user's head. The straps 25 may then be connected to the abutment member, thereby enabling flexible adaptation to the shape of the head. At the same time, a secure contact of the protective helmet 1 with the head of the user can be ensured.As FIGS. 1, 4 and 5 show, the fit device 17 preferably has a neck strap 26 for bearing against the back of the user's head, whereby a particularly good fixing of the protective helmet 1 on the user's head is achieved.In the worn state, the neck strap 26 abuts the back head, in particular the back main leg, and / or the neck of the user. The neck strap 26 can prevent, in particular, a twisting and / or displacement of the protective helmet 1 relative to the user's head.The neck strap 26 can preferably be brought from a safety position shown in FIG. 4, in which the neck strap 26 is oriented for contact in the region of the back head, in particular the occipital leg, of the user and / or protrudes at least in sections from the ring segment 4, into a passive position shown in FIG. 5, in which the neck strap 26 is arranged in particular completely within the ring segment 4.In this way, the neck strap 26 does not protrude from the ring segment 4 in the transport state of the protective helmet 1, whereby a particularly compact arrangement of the protective helmet 1 can be achieved. During the transport of the protective helmet 1, sticking to the neck strap 26 can thus be prevented.The neck strap 26 is preferably pivotably connected to the ring segment 4. The neck strap 26 can also be connected to the ring segment 4 via a connecting part 20.The neck strap 26 can have a locking mechanism in order to be able to be fixed in different positions relative to the ring segment 4, in particular in a releasable manner.In order to achieve a particularly stable connection between the roof segment 5 and the ring segment 4 in the wearing state of the protective helmet 1, the protective helmet 1 preferably has a locking system 27. The locking system 27 is preferably designed such that the ring segment 4 and the roof segment 5 can be fixed to one another in the supporting state of the protective helmet 1 or in the supporting position of the roof segment 5. In particular, the ring segment 4 and the roof segment 5 are releasably fixed to one another in the supporting state.The locking system 27 preferably has a locking element 28 connected to the ring segment 4, in particular pivotably.The locking element 28 is preferably held on the ring segment 4 so as to be pivotable about a locking axis V or is connected thereto.Spaced apart from the locking axis V, the locking element 28 preferably has at least one locking projection 29.The roof segment 5 preferably has at least one locking recess 30 for receiving the at least one locking projection 29.The locking element 28 can be brought, in particular pivoted, in particular from an unlocking position, in which the locking element 28 does not connect or fix the ring segment 4 to the roof segment 5, into a locking position, in which the locking element 28 connects or locks the ring segment 4 to the roof element 5.Preferably, the locking projection 29 is held in the locking recess 30 in the locking position in a positive and / or non-positive manner, whereby a fixing between the ring segment 4 and the roof segment 5 can be achieved in a particularly simple manner.The locking projection 29 and the locking recess 30 can be formed according to the principle of a snap connection, in particular a manually releasable snap connection.In particular, the locking projection 29 can be latched in the locking recess 30 in the locking position.In particular, the locking projection 29 or a section of the locking projection 29 can engage behind a retaining projection in the region of the locking recess 30.The locking projection 29 is preferably elastically deformable, whereby a connection to the locking recess 30 can be realized in a particularly simple manner. In the embodiment shown in FIGS. 8A to 8C, the locking protrusion 29 preferably has a material recess 31 in order to enable and / or improve the elastic deformability of the locking protrusion 29.In the embodiment shown in FIG. 8C, the locking element 28 has two locking projections 29. The roof segment 5 then preferably has at least, in particular exactly, two locking recesses 30. More than two locking projections 29 and two locking recesses 30 are also possible.In order to be able to transport the protective helmet 1 after being worn on the head in a particularly compressed or space-saving manner, the user preferably initially takes the protective helmet 1 from the head.Subsequently, the head ring 19 can be brought, in particular pivoted, from the carrying position into the transport position.Before, simultaneously or subsequently, the neck strap 26 can be transferred, in particular pivoted, from the safety position into the passive position.Subsequently, before or simultaneously, the locking between the ring segment 4 and the roof segment 5 can be released by means of the locking system 27.The roof segment 5 can subsequently be brought, in particular pivoted, from the carrying position into the transport position. The roof segment 5 is preferably pivoted at least substantially 360° relative to the ring segment 4.The roof segment 5 can be brought into engagement with the retaining projection 11 in such a way that the roof segment 5 is held within the ring segment 4 by means of the retaining projection 11.The movement between the roof segment 5 and the ring segment 4 is preferably limited by the flexible connecting element 7.The chin strap 18 and / or the holding structure 24 can be arranged within the ring segment 4 or the roof segment 5.The protective helmet 1 is then in the transport state shown in FIG. 3.The transport of the protective helmet 1 can be carried out in a particularly simple manner in the transport state because of the small space requirement. At the same time, the costs for packaging and / or transport can be reduced due to the small size. At the same time, high safety in the wearing state can be ensured.The protective helmet 1 can be used in various ways. Thus, the protective helmet can be used as a construction site helmet. The ring segment 4 and the roof segment 5 are then preferably each embodied in a single layer or produced from only one material.For sports applications, in particular as a bicycle, ski and / or motorcycle helmet, the ring segment 4 and the roof segment 5 can be of multilayer construction. In particular, the ring segment 4 and the roof segment 5 can have an outer layer made of plastic. The outer layer is preferably harder than the inner layer. The inner layer may be made of, for example, polystyrene.The protective helmet 1 can be used universally and can also be used in police, fire fights or in military applications. According to the requirements of use, the shape and the materials used of the protective helmet 1 can be adapted or selected.List of reference numbers:1 Protective helmet 2 Head protection element 3 Receiving opening 4 Ring segment 5 Roof segment 6 Transition opening 7 Connecting element 8 Connecting portion 9 Extension region 10 Depression portion 11 Holding projection 12 Projection 13 Recess 14 Holding portion 15 Projection 16 Receiving recess 17 Matching device 18 Chin strap 19 Head ring 20 Connecting part 21 Comfort side 22 Head ring element 23 Intermediate element 24 Holding structure 25 Straps 26 Neck strap 27 Locking system 28 Locking element 29 Locking projection 30 Locking recess 31 Material recess A Placement axis D Roof segment axis R Ring segment axis S Pivot axis V Locking axis X Arrow

Claims

Compressible protective helmet for protecting a head, comprising a head protection element (2) which extends along a placement axis (A), wherein the head protection element (2) has a ring segment (4) and a roof segment (5) separate from the ring segment (4), and comprising a fit device (17) for reliably fastening the protective helmet (1) to a head of a user, wherein the protective helmet (1) can be brought from a wearing state, in which the protective helmet (1) can be placed on a head and provides a safety function for the user, into a transporting state, in which the protective helmet (1) is compressed with respect to the wearing state, characterized in that, the ring segment (4) extending along a ring segment axis (R) from a receiving opening (3) for receiving the head of a user to an over opening (6), the fitting device (17) having a head ring (19) for fastening and / or for bearing the protective helmet (1) on the head, in particular on the head periphery, of the user, wherein the head ring (19) can be moved from a carrying position, in which the head ring (19) has a first distance from the receiving opening (3), into a transport position, in which the head ring (19) has a second distance from the receiving opening (3), wherein the second distance is greater than the first distance.Compressible protective helmet according to claim 1, characterised in that the ring segment (4) and the roof segment (5) are connected to one another by means of a flexible connecting element (7), in particular wherein the flexible connecting element (7) is formed as a flexible strip.Compressible protective helmet according to claim 2, characterised in that the roof segment (5) has a connecting section (8) for connection to the ring segment (4) in the supporting position, wherein the roof segment (5) is connected to the flexible connecting element (7) in the region of the connecting section (8), and wherein the flexible connecting element (7) is connected to the ring segment (4) in a central extension region (9) of the ring segment (4).Compressible protective helmet according to claim 2 or 3, characterised in that the ring segment (4) and / or the roof segment (5) has or have an outer recess portion (10) which is formed in such a way that the flexible connecting element (7) does not project outwards beyond the outer contour of the ring segment (4) and / or the roof segment (5) in the supporting position of the roof segment (5).Compressible protective helmet according to one of the preceding claims, characterized in that one component of ring segment (4) and roof segment (5) has at least one projection (12) and the other component has a corresponding recess (13), wherein the projection (12) engages in the recess (13) in the supporting state in such a way that the roof segment (5) is fixed relative to the roof segment (4) in the radial and / or axial direction.Compressible protective helmet according to one of the preceding claims, characterized in that the ring segment (4) extends along a ring segment axis (R) from a receiving opening (3) for receiving the head of a user as far as an over opening (6), in that the roof segment (5) can be moved from a carrying position, in which the roof segment (5) is placed on the ring segment (4) in the region of the over opening (6) in such a way that the roof segment (5) adjoins the ring segment (4) in the axial direction, into a transport position, in which the roof segment (5) is arranged within the ring segment (4), in particular wherein the roof segment (5) can be moved from the carrying position into the transport position within the scope of a rotational and / or pivoting movement of at least substantially 360° relative to the ring segment (4).Compressible protective helmet according to one of the preceding claims, characterized in that the protective helmet (1) has a locking system (27) which is designed in such a way that the ring segment (4) and the roof segment (5) can be fixed to one another, in particular in a releasable manner, by means of the locking system (27) in the supporting state of the protective helmet (1).Compressible protective helmet according to one of the preceding claims, characterized in that the head ring (19) has at least one head ring element (22) and at least one flexible intermediate element (23) for connecting adjacent ends of the at least one head ring element (22), preferably wherein the head ring (19) has at least two head ring elements (22) and at least two flexible intermediate elements (23), wherein in each case one flexible intermediate element (23) connects mutually facing ends of two adjacent head ring elements (22).Compressible protective helmet according to one of the preceding claims, characterized in that the head ring (19) is pivotable about a pivot axis (S) relative to the head protection element (2), in particular relative to the ring segment (4), in particular wherein the pivot axis (S) is arranged at least substantially perpendicular to the placement axis (A).Compressible protective helmet according to one of the preceding claims, characterized in that the fit device (17) has a neck strap (26), wherein the neck strap (26) can be brought from a safety position, in which the neck strap (26) is oriented for bearing in the region of the user's back head and / or is arranged at least in sections outside the ring segment (4), into a passive position, in which the neck strap (26) is arranged inside the ring segment (4), in particular wherein the fit device (17) has a holding structure for bearing on the user's skull roof, wherein the holding structure has at least two elastic straps (25), in particular wherein the at least two elastic straps (25) cross, in particular in the apex region.Compressible protective helmet according to claim 10, characterised in that the neck strap (26) is pivotably connected to the ring segment (4).Method for compressing a protective helmet (1) according to one of the preceding claims, characterized in that the head ring (19) is brought into the transport position by means of a rotational and / or pivoting movement of at least 150° starting from the carrying position.

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