Helmet having a protective device

Abstract

The invention relates to a helmet, in particular a bicycle helmet for children, comprising a helmet shell (1) having a thin-walled outer shell (2), an inner shell (3) absorbing impact energy, and having a neck extension (4) for surrounding the back of the head and for supporting the helmet in the neck region, - wherein a rubbery-elastically deformable protective device (5) is provided, which extends along the terminating edge (6) of the helmet shell (1) from the neck extension (4) forwards as far as over the forehead region (7) and back again as far as the neck extension (4) and forms a resilient edge guard, - and wherein the protective device (5) protrudes forward in the forehead region (7) and forms a resilient visor (8) there, which acts in particular as a sun visor, a rain visor, and as a resilient face-impact protection.

Description

[0001] Woom GmbH, Muthgasse 109a, 1 190 Vienna (AT)

[0002] Helmet with a protective device

[0003] The invention relates to a helmet according to the features of the independent claim. In particular, the invention relates to a children's home and specifically to a bicycle helmet for children.

[0004] Especially when cycling, there is a significant conflict between the safety, comfort, and functionality of a helmet. The safety aspect is particularly relevant for children, as their protective reflexes for head protection are not yet fully developed. While adults are often able to protect their heads during bicycle falls, facial injuries are relatively common in children. Even when children wear helmets, there is an increased risk that they will be too loose or fit incorrectly. Furthermore, many bicycle helmets offer insufficient glare protection from sunlight and inadequate rain protection for the face.

[0005] The object of the invention is to overcome the disadvantages of the prior art and, in particular, to create a crash helmet that resolves the conflict between safety, comfort, and functionality. This object is achieved in particular by the features of the independent claim. Woom GmbH, Muthgasse 109a, 1190 Vienna (AT)

[0006] A helmet, in particular a bicycle helmet for children, is disclosed comprising a helmet shell with a thin-walled outer shell, an impact-energy-absorbing inner shell and a neck extension for gripping the back of the head and supporting the helmet in the neck area.

[0007] Preferably, a rubber-elastic deformable protective device is provided, which extends along the end edge of the helmet shell from the cervical process forwards to over the forehead area and back again to the cervical process, forming an elastic edge protection.

[0008] Preferably, the protective device is designed to project forward in the forehead area and forms an elastic shield there, which acts in particular as a sun shield, as a rain shield and as elastic face impact protection.

[0009] If necessary, the protective device is designed to cover the edge of the helmet shell.

[0010] If necessary, the protective device is designed to cover the finishing edges of the outer shell and / or the inner shell.

[0011] If necessary, the protective device is designed to cover the edge of the helmet shell along its entire contour.

[0012] If necessary, the protective device is designed to be closed in a ring shape.

[0013] Preferably, the protective device is designed as a continuous elastic lip that widens forward in the forehead area to form a shield shape.

[0014] Preferably, in all embodiments, the protective device is firmly and, in particular, permanently connected to the helmet shell. Specifically, the protective device is connected to the helmet shell along its entire length. 64817

[0015] Woom GmbH, Muthgasse 109a, 1 190 Vienna (AT)

[0016] If necessary, the protective device is provided to be a one-piece part made of an elastic material.

[0017] If necessary, the protective device is provided that it extends more than 2cm, preferably more than 3cm and particularly preferably more than 4cm beyond the helmet shell in the forehead area.

[0018] If necessary, the outer shell is made of a thin-walled hard plastic such as PC or ABS.

[0019] If necessary, the inner shell is made of an impact-absorbing material that plastically deforms to absorb impact energy.

[0020] If necessary, the material of the inner shell is intended to be a rigid foam such as EPS.

[0021] If necessary, the protective device is designed to be made of an elastically resilient material that deforms elastically to absorb impact energy but returns to its original shape.

[0022] If necessary, the material is intended to be a rubber-elastic deformable material such as EPP, TPE or foamed PU.

[0023] If necessary, an adjustment system with an adjustment device and a forehead strap is provided to adapt the helmet to a head shape or head size.

[0024] The forehead strap may be a closed loop that extends inside the helmet shell around the helmet's opening and is adjustable in size at the nape of the neck using an adjustment mechanism. Woom GmbH, Muthgasse 109a, 1190 Vienna (AT)

[0025] If necessary, the adjustment system is designed to be padded with one or more cushioning elements in the forehead area and / or in the neck area towards the head opening.

[0026] If necessary, the nuchal process is designed to have a central indentation and two bulges extending on either side of the indentation for support in the neck area.

[0027] If necessary, the protective device is designed to cover the end edge also in the area of ​​the indentation and the two protrusions.

[0028] If necessary, the adjusting device is arranged to be recessed between the protrusions in the indentation.

[0029] If necessary, the protrusions are designed to extend beyond the adjustment device.

[0030] If necessary, it is provided that an ear recess is provided in each of the side sections of the helmet shell to create openings for the ears.

[0031] If necessary, the protective device is designed to cover the edge of the helmet shell, including the area of ​​the ear recess.

[0032] If necessary, the end edge is provided to have a multiply curved, rounded contour, along which one of the ear indentations, one bulge of the nuchal process, the indentation of the nuchal process, the other bulge of the nuchal process and the other ear indentation are arranged successively.

[0033] Where applicable, the protective device is designed to follow the curved contour. Woom GmbH, Muthgasse 109a, 1190 Vienna (AT)

[0034] If necessary, a chin strap that can be opened and closed is provided.

[0035] If necessary, a positioning loop is provided in each of the two side areas of the helmet shell, which is attached along the edge in front of and after the ear recess and runs from there in a closed loop shape.

[0036] If necessary, the positioning loops are designed to penetrate the protective device in the area of ​​the finishing edge and be attached to the helmet shell.

[0037] If necessary, the ends of the chin strap are each attached to one of the positioning loops.

[0038] If necessary, the positioning loops are to be formed by flexible cords or strings with a round cross-section.

[0039] If necessary, the positioning loops are designed to be retroreflective.

[0040] If necessary, the protective device may have a groove into which the end edge or an end rib provided on the end edge projects.

[0041] If necessary, the end bridge in the forehead area is designed to have a greater bridge thickness than in the area of ​​the ear indentation and / or in the area of ​​the nuchal process.

[0042] If necessary, the end web is provided for to be formed from the material of the inner shell.

[0043] The end flange may be formed integrally with the inner shell. Woom GmbH, Muthgasse 109a, 1190 Vienna (AT)

[0044] If applicable, the helmet shell is provided for to be, or contain, a composite of outer shell, protective device and inner shell formed by injection molding the outer shell with the material of the inner shell.

[0045] The protective device preferably runs along the edge of the helmet shell. In all embodiments, the protective device preferably covers the edge of the helmet shell, so that it is softly and / or elastically padded.

[0046] This protects the head and neck area of ​​a person wearing the helmet from injuries caused by the edge.

[0047] The protective device is designed in such a way that it projects forward at the forehead, thereby forming an elastic shield. Besides practical functions such as sun and rain protection, this shield also serves a safety-relevant function as elastic facial impact protection. Because the protective device projects forward from the helmet shell, it forms an elastic buffer that can absorb strong impacts or the force of a fall. Preferably, the protective device, and in particular its shield, extends beyond the outer shell at the forehead.

[0048] To improve comfort while maintaining safety, the helmet features a nuchal extension. This extension wraps around the back of the head and extends into the neck area, specifically to the nape of the neck. In the event of an impact where force is exerted on the forehead or visor, the helmet shell can be supported by the nuchal extension at the neck. This prevents the helmet from twisting upwards and thus avoids facial injury. To further enhance this function, the protective element is also incorporated in the area of ​​the nuchal extension, covering its edge. This improves both the safety and functionality of the nuchal extension.

[0049] The configuration allows the protective device at the helmet shell's edge, in the area of ​​the nuchal process, to work in conjunction with the forward-projecting elastic shield. Woom GmbH, Muthgasse 109a, 1190 Vienna (AT)

[0050] Preferably, the protective device extends along the entire outer edge of the helmet shell.

[0051] The cervical process preferably includes a central indentation and two projections extending on either side of the indentation for support in the neck region. Part of the adjustment mechanism can, for example, be mounted in the indentation. Recessing the adjustment mechanism into the indentation also increases safety. The indentation thus works synergistically with the forward-projecting shield.

[0052] Preferably, each of the two side sections of the helmet shell has an ear recess, creating an opening for one ear. This improves wearing comfort. To simultaneously ensure safety, the protective device also extends along the outer edge of the helmet shell in the area of ​​the ear recesses.

[0053] Preferably, the protective device has a groove into which the end edge or a finishing rib provided on the end edge projects. In particular, the groove extends along the longitudinal axis of the protective device. This groove allows the protective device to engage the end edge or finishing rib. The groove can be continuous or partially interrupted. In particular, the finishing rib can extend continuously or intermittently along the end edge.

[0054] The bridge at the forehead may be thicker than, for example, in the area of ​​the ear indentation or the nuchal process. This makes the bridge at the forehead more stable, and allows it to better absorb impact energy in a frontal collision.

[0055] This helmet is primarily a children's crash helmet. Woom GmbH, Muthgasse 109a, 1190 Vienna (AT)

[0056] The transition when extending the protective device to a shield is preferably gradual and therefore stepless.

[0057] If necessary, a gradual transition from the helmet shell, in particular the outer shell, to the top of the shield is provided. If necessary, the shield consists entirely of an elastic material, in particular the material of the protective device.

[0058] Preferably, the top of the shield is also formed from the elastic material of the protective device.

[0059] The outer shell preferably has a thickness of 0.5 mm to 1 mm, preferably of about 0.7 mm.

[0060] The following is a list of helmet components and possible materials that may exhibit one or more of the physical parameters listed below:

[0061] Outer shell, e.g., PC or ABS:

[0062] Impact resistance

[0063] - Parameter size: Minimum impact energy > 15 kJ / m² 2

[0064] - Standard: ISO 6603-2 (Plastics - Impact test by drop pendulum)

[0065] - Measurement method: Pendulum impact test with energy absorption and damage assessment.

[0066] hardness

[0067] - Parameter size: Minimum hardness of 60 Shore D

[0068] - Standard: ISO 2039-2 (Plastics - Determination of hardness by indentation testing)

[0069] - Measurement method: Hardness testing using indenters.

[0070] Tensile strength

[0071] - Parameter size: > 40 MPa, preferably > 60 MPa

[0072] - Standard: ISO 527-1 (Determination of the tensile strength of plastics) Woom GmbH, Muthgasse 109a, 1190 Vienna (AT)

[0073] Measurement method: Tensile test until breakage.

[0074] Inner shell, e.g., EPS

[0075] density

[0076] - Parameter size: Density range: 28-96 g / l, preferably 50 g / l to 80 g / l

[0077] - Standard: ISO 845 (Determination of the density of cellular plastics)

[0078] - Measurement method: Determination of the volume and weight of the sample.

[0079] Energy absorption

[0080] - Parameter size: The inner shell should absorb at least 80%, preferably at least 90% of the impact energy.

[0081] - Standard: EN 1078 (Helmets for cyclists and for users of skateboards and roller skates)

[0082] - Measurement method: Impact tests on a test model.

[0083] compressive strength

[0084] - Parameter size: Minimum compressive strength: > 100 kPa (at 10% deformation)

[0085] - Standard: ISO 844 (Determination of the printing properties of rigid cellular plastics)

[0086] - Measurement method: Compression test between plates.

[0087] Protective device e.g. TPU or EPP

[0088] density

[0089] - Parameter size: Density range: 40-60 g / l, preferably 45-55 g / l

[0090] - Standard: ISO 845 (Determination of the density of cellular plastics)

[0091] - Measurement method: Determination of the volume and weight of the sample.

[0092] spring constant

[0093] - Parameter size: Spring constant (k): Suitable, typically in the range of 0.1 to 5 N / mm, depending on the Shore hardness and the thickness of the protective device.

[0094] Hardness 64817

[0095] Woom GmbH, Muthgasse 109a, 1 190 Vienna (AT)

[0096] - Parameter size: Shore A: 30-70, preferably 40-60

[0097] - Standard ISO 7619-1

[0098] - Measurement method: Hardness testing using indenters.

[0099] The invention will then be further described using the figures.

[0100] Fig. 1 shows a schematic oblique view of an embodiment of a helmet.

[0101] Fig. 2 shows a schematic view of a helmet from behind.

[0102] Fig. 3 shows a schematic view of a possible design of a helmet from below.

[0103] Fig. 4 shows a schematic sectional view along the longitudinal plane of the helmet.

[0104] Unless otherwise specified, the reference symbols correspond to the following characteristics:

[0105] Helmet shell 1, outer shell 2, inner shell 3, nuchal process 4, protective device 5, finishing edge 6, forehead area 7, shield 8, adjustment system 9, adjustment device 10, forehead strap 11, head opening 12, padding element 13, indentation 14', protrusion 14", ear indentation 15, chin strap 16, positioning loop 17, groove 18, end bar 19, bar thickness 20.

[0106] Fig. 1 shows a schematic oblique view of a helmet. The helmet comprises a helmet shell 1, which has an outer shell 2 and an inner shell 3.

[0107] The outer shell 2 is preferably thin-walled and in all embodiments consists of a hard plastic suitable for an outer shell, such as polycarbonate or ABS.

[0108] The inner shell 3 is thicker than the outer shell 2 and is designed to absorb impact energy. Specifically, the inner shell 3 absorbs the impact energy through plastic deformation. The inner shell 3 is made of a suitable material such as rigid foam, and in particular EPS. 64817

[0109] Woom GmbH, Muthgasse 109a, 1 190 Vienna (AT)

[0110] The helmet shell 1 includes a cervical extension 4 that surrounds the back of the head of the person wearing the helmet and in particular provides support for the helmet shell 1 in the neck area.

[0111] The helmet includes a protective device 5. The protective device extends along the terminating edge 6 of the helmet shell 1. In particular, the protective device 5 extends from the cervical process 4 along the lateral areas of the helmet to the forehead area 7. In the forehead area 7, the protective device 5 extends forward and forms a shield 8.

[0112] The protective device 5 is preferably made of rubber-elastic material and serves synergistically both as impact protection between the end edge 6 and the head or neck area and as face impact protection. For this purpose, the elastic shield 8 projects from the helmet shell 1 in the forehead area 7. In particular, the shield projects forward from the helmet shell 1 by more than 1 cm, preferably by more than 2 cm, and most preferably by more than 3 cm.

[0113] The protective device 5 is designed in particular as an elastic lip that runs along the end edge 6 and widens forward in the forehead area to form a shield shape. Preferably, the entire protective device 5, and in particular also the shield 8 of the protective device 5, is a single piece. Optionally, the protective device 5 is a continuous ring that covers the entire end edge 6 of the helmet shell 1.

[0114] In particular, the helmet shell 1 includes an ear recess 15 in each of its side sections, creating a clearance in the ear area. This improves wearing comfort. Preferably, the protective device 5 also extends along the end edge 6 in the area of ​​the ear recesses 15.

[0115] The helmet preferably includes a chin strap 16. This chin strap 16 can be attached to positioning loops 17. The positioning loops 17 run, for example, in the area of ​​the ear recesses 15. The loop-shaped design creates an opening for the ears, which is located on 64817

[0116] Woom GmbH, Muthgasse 109a, 1 190 Vienna (AT) which is formed on one side by the positioning loop 17 and on the other side by the ear indentation 15 or the protective device 5 in the area of ​​the ear indentation 15.

[0117] Fig. 2 shows a helmet, in particular the helmet from Fig. 1, in a schematic view from behind.

[0118] The helmet comprises a helmet shell 1 with an outer shell 2, an inner shell 3 and a protective device 5. The protective device 5 extends along the end edge 6 of the helmet shell 1.

[0119] The helmet shell 1 comprises a cervical extension 4. The cervical extension 4 preferably comprises a recess 14' and protrusions 14" provided on both sides of this recess 14'. The adjustment device 10 of an adjustment system 9 can be arranged in the recess 14'. In particular, the adjustment device 10 can be recessed in the recess 14'.

[0120] The protrusions 14" of the nuchal process 4 are designed to encompass the back of the head and provide support for the helmet in the neck area. In the present embodiment, the protective device 5 extends along the end edge 6 into the area of ​​the nuchal process 4. In particular, the protective device 5 covers the end edge 6 in the area of ​​the protrusions 14". This provides an elastic protective device 5 even in the area where the helmet shell 1 is supported at the neck in the event of a fall.

[0121] In the present embodiment, the protective device 5 is also provided in that area of ​​the end edge 6 in which the indentation 14' is located.

[0122] Fig. 3 shows a schematic view of a helmet from below. This helmet corresponds in particular to the embodiment of Fig. 1 and / or Fig. 2. The helmet comprises a helmet shell 1 with an outer shell 2 and an inner shell 3. The helmet shell 1 includes a neck extension 4. The end edge 6 is covered in this illustration by the protective device 5. The protective device 5 preferably extends 64817

[0123] Woom GmbH, Muthgasse 109a, 1190 Vienna (AT) along the entire edge 6 of the helmet shell 1. In addition, the protective device 5 extends in the forehead area 7 to form a shield 8.

[0124] The helmet preferably comprises an adjustment system 9 with an adjustment device 10 and a forehead strap 11. The size of the forehead strap can be adjusted using the adjustment device 10. In particular, the adjustment device 10 and the forehead strap 11 form an annular opening whose diameter or dimensions can be changed. The forehead strap 11 is preferably continuous and encircles the wearer's head or the head opening 12.

[0125] In the head opening 12, particularly on the inside of the inner shell 3, one or more padding elements 13 can be provided. By selecting the thickness of the padding element, the shape of the inner shell 3 can be adapted to the shape of the head. Alternatively, the padding elements 13 can be fixed and increase comfort and safety.

[0126] The cervical process 4 preferably comprises a central indentation 14' and two protrusions 14" provided on either side of this indentation for support in the neck area.

[0127] In the area of ​​the lateral ear indentations 15, the positioning loops 17 for a chin strap 16 can be provided.

[0128] Fig. 4 shows a schematic sectional view of a helmet, in particular the helmet from Figures 1, 2 and / or 3.

[0129] The helmet shell 1 comprises an outer shell 2 and an inner shell 3. The helmet shell 1 includes a finishing edge 6. This finishing edge 6 is covered by the protective device 5. In particular, the protective device 5 extends from the nuchal process 4 to the forehead region 7 and back again to the nuchal process 4. In the forehead region 7, the protective device 5 forms a shield 8 that projects forward from the helmet shell 1. 64817

[0130] Woom GmbH, Muthgasse 109a, 1 190 Vienna (AT)

[0131] In this embodiment, the protective device 5 comprises a groove 18 that engages the end edge 6 or an end rib 19 of the end edge 6. In particular, the end rib 19 is inserted into the groove 18. This allows for a particularly secure connection of the protective device 5 to the helmet shell 1.

[0132] The end web 19 is preferably formed by the inner shell 3. The end web 19 has a web thickness 20. In the present embodiment, the web thickness 20 is smaller in the region of the neck process 4 than in the frontal region 7, i.e., in the region of the shield 8. Preferably, the web thickness in the region of the shield or in the frontal region 7 should be greater than in the remaining area of ​​the end edge 6.

[0133] The cervical extension widens the half-shell shape of the helmet shell towards the neck, so that the helmet shell is not just designed as a simple downward-opening half-shell, but encompasses and protects the back of the wearer's head.

[0134] Preferably, in all embodiments, the helmet shell is a composite formed by overmolding the outer shell 2 with the material of the inner shell 3. Alternatively, the helmet shell may comprise such a composite. During manufacturing, the outer shell 2 and the protective device 5 can be placed in an injection mold. In a further step, the injection mold is closed, and the material of the inner shell can be injected. The cavity of the injection mold is preferably filled with the material of the inner shell 3. The protective device can serve as a seal for the injection mold during injection molding. This simplifies the production of the helmet and simultaneously creates a strong and therefore safe composite of the outer shell 2, protective device 5, and inner shell 3.A groove 18 provided in the protective device 5 can also be filled with the material of the inner shell during injection molding to create a firm connection. This may eliminate the need for subsequent bonding, further improving safety. However, bonding may be required to create a secure connection.

Claims

Woom GmbH, Muthgasse 109a, 1 190 Vienna (AT) Patent claims 1. Helmet, in particular a bicycle helmet for children, comprising a helmet shell (1 ) with a thin-walled outer shell (2), an impact-absorbing inner shell (3) and with a neck extension (4) for gripping the back of the head and supporting the helmet in the neck area, - wherein a rubber-elastic deformable protective device (5) is provided which extends along the end edge (6) of the helmet shell (1) from the cervical process (4) forward to over the forehead area (7) and back again to the cervical process (4) and forms an elastic edge protection, - and wherein the protective device (5) is designed to project forward in the forehead area (7) and forms an elastic shield (8) there, which acts in particular as a sun shield, as a rain shield and as elastic face impact protection.

2. Helmet according to claim 1, characterized in that, - that the protective device (5) covers the end edge (6) of the helmet shell (1 ), - in particular that the protective device (5) covers the end edges (6) of the outer shell (2) and the inner shell (3).

3. Helmet according to claim 1 or 2, characterized in that, - that the protective device (5) covers the end edge (6) of the helmet shell (1) along its entire contour, - and in particular that the protective device (5) is designed to be closed in a ring shape.

4. Helmet according to one of claims 1 to 3, characterized in that, - that the protective device (5) is designed as a continuous elastic lip which extends forward in the frontal area (7) to form a shield shape, - in particular that the protective device (5) is a one-piece part made of an elastic material. Woom GmbH, Muthgasse 109a, 1 190 Vienna (AT) 5. Helmet according to one of claims 1 to 4, characterized in that the protective device (5) extends beyond the helmet shell (1) in the forehead area (7) by more than 2cm, preferably more than 3cm and particularly preferably more than 4cm.

6. Helmet according to one of claims 1 to 5, characterized in that the outer shell (2) is made of a thin-walled hard plastic such as PC or ABS.

7. Helmet according to one of claims 1 to 6, characterized in that, - that the inner shell (3) is made of an impact-absorbing material which deforms plastically to absorb impact energy, - in particular that the material is a rigid foam such as EPS.

8. Helmet according to one of claims 1 to 7, characterized in that, - that the protective device (5) is made of an elastically resilient material which deforms elastically to absorb impact energy but returns to its original shape, - in particular that the material is a rubber-elastic deformable material such as EPP, TPE or foamed PU.

9. Helmet according to one of claims 1 to 8, characterized in that, - that an adjustment system (9) with an adjustment device (10) and a forehead strap (11) is provided for adjusting the helmet to a head shape or head size, - and that the forehead loop (11 ) is a closed loop which extends inside the helmet shell (1 ) around the head opening (12) of the helmet and is adjustable in size in the area of ​​the cervical process (4) by the adjustment device (10).

10. Helmet according to one of claims 1 to 9, characterized in that the adjustment system (9) towards the head opening (12) in the forehead area (7) and / or in the neck area is padded with one or more padding elements (13). 64817 Woom GmbH, Muthgasse 109a, 1 190 Vienna (AT) 11. Helmet according to one of claims 1 to 10, characterized in that the cervical process (4) has a central indentation (14') and two protrusions (14") extending on either side of the indentation (14') for support in the neck area.

12. Helmet according to claim 11, characterized in that the protective device also covers the end edge (6) in the area of ​​the indentation (14') and the two protrusions (14").

13. Helmet according to claim 11 or 12, characterized in that the adjusting device (10) is arranged recessed between the protrusions (14") in the indentation (14') and that the protrusions (14") extend beyond the adjusting device (10).

14. Helmet according to one of claims 1 to 13, characterized in that, - that in each of the side sections of the helmet shell (1) there is an ear indentation (15) is intended to create clearances for the ears, - and that the protective device (5) also covers the end edge (6) of the helmet shell (1) in the area of ​​the ear recess (15).

15. Helmet according to claim 14, characterized in that - that the end edge (6) has a multiply curved, rounded contour, along which one of the ear indentations (15), a protrusion (14") of the nuchal process (4), the indentation (14') of the nuchal process (4), the other protrusion (14") of the nuchal process (4) and the other ear indentation (15) are arranged successively, - and that the protective device (5) is arranged following the curved contour.

16. Helmet according to one of claims 1 to 15, characterized in that an openable and closable chin strap (16) is provided.

17. Helmet according to claim 16, characterized in that - that in each of the two side areas of the helmet shell (1) there is one Woom GmbH, Muthgasse 109a, 1 190 Vienna (AT) A positioning loop (17) is provided, which is attached along the end edge (6) before and after the ear indentation (15) and runs from there in a closed loop shape, - that the positioning loops (17) penetrate the protective device (5) in the area of ​​the end edge (6) and are attached to the helmet shell (1), - and that the ends of the chin strap (16) are each attached to one of the positioning loops (17).

18. Helmet according to claim 17, characterized in that - that the positioning loops (17) are formed by flexible cords or strings with a round cross-section, - in particular that the positioning loops (17) are retroreflective.

19. Helmet according to one of claims 1 to 18, characterized in that the protective device (5) has a groove (18) into which the end edge (6) or an end rib (19) provided on the end edge (6) projects.

20. Helmet according to claim 19, characterized in that the end bar (19) in the forehead area (7) has a greater bar thickness (20) than in the area of ​​the ear indentation (15) or in the area of ​​the cervical process (4).

21. Helmet according to claim 19 or 20, characterized in that, - that the end web (19) is formed from the material of the inner shell (3) - and in particular that the end web (19) is formed integrally with the inner shell (3).

22. Helmet according to one of claims 1 to 21, characterized in that the helmet shell (1 ) is a composite of outer shell (2), protective device (5) and inner shell (1 ) formed by injection molding the outer shell (2) with the material of the inner shell (3), or contains such a composite.

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