WO2014122247A1

WO2014122247A1 - Protective helmet

Info

Publication number: WO2014122247A1
Application number: PCT/EP2014/052397
Authority: WO
Inventors: Siegbert Tolk; Stefan Effmann
Original assignee: Dräger Safety AG & Co. KGaA
Priority date: 2013-02-09
Filing date: 2014-02-07
Publication date: 2014-08-14
Also published as: DE102013002345A1

Abstract

The invention relates to a protective helmet (1), comprising a helmet shell (2) and a circumferential head band (3), which is used to rest on the head (4) of a user, wherein the circumferential head band (3) is fastened to the inside (11) of the helmet shell (2) by fastening means (10) at a front point (6) and at least at one point (8, 9) on each side of the protective helmet (1) with respect to the longitudinal orientation (5) of the protective helmet (1), wherein at least the fastening means (10) arranged at the lateral points (8, 9) are designed in such a way that the distance (12) between the circumferential head band (3) and the helmet shell (2) can be adjusted at at least one of the lateral points (8, 9).

Description

helmet

Description

The present invention relates to a protective helmet, comprising a helmet shell and a head circumference band, which serves to rest against the head of a user, wherein the head band relative to the longitudinal direction of the protective helmet at a front location, at a rear location and on each side of the helmet is fastened in each case at least at one point via fastening means on the inside of the helmet shell. Since the human head is individually very different in terms of the head shape, that is, the head circumference, the head width and the head height, protective helmets generally have systems that consider the head circumference as well as the head height in the setting. This serves to generate a comfortable fit of the safety helmet on the head and to ensure a firm and secure fit of the safety helmet so that the protective function of the safety helmet is ensured.

In order to fully ensure the protective function of a safety helmet, the protective helmet must be adapted with regard to the shape of the head. By adjusting a firm fit of the helmet is achieved with the associated correct position of the head in the helmet. With protective helmets there are possibilities of adjustment for the head circumference and the head height. If you look at the head from the top, head shapes can be approximated by ellipse geometries or circle geometries, see figures 6d and 6e. In reality, however, head contours are often characterized by sink marks and expressions of any kind and at any place. Due to the existing adaptation systems, only the already mentioned simple geometries are displayed or set. A continuous system of the head circumference band or a head circumference band formed as a head restraint ring is thus not guaranteed to the full extent. It is therefore an object of the present invention to remedy the disadvantages described above in a protective helmet at least partially. In particular, it is an object of the present invention to provide a protective helmet with at least one helmet shell and a head circumference band, which ensures a high wearing comfort and high safety in a cost-effective and simple manner.

The above object is achieved by a protective helmet with the features of claim 1. Further details of the invention will become apparent from the dependent claims, the description and the drawings.

That is, the object of the invention is achieved by a protective helmet, comprising a helmet shell and a head circumference band, which serves to rest against the head of a user. The head circumference is relative to the longitudinal direction of the helmet at a front location and on each side of the helmet each secured at least at one point via fastening means on the inside of the helmet shell. According to the invention the protective helmet is characterized in that at least arranged at the lateral locations fastening means are designed such that the distance between the head circumference band and the helmet shell at at least one of the lateral locations, in particular individually, is adjustable. For the purposes of the invention, "front" means that the fastening of the head circumference band is provided in the region of the front head side. The front location preferably lies in the region of the longitudinal axis of the protective helmet. However, the front part can also mean that the attachment is provided in the region of the visor or in an area of the protective helmet which is assigned to the forehead of the user. Attachment to each side of the protective helmet means that at least one attachment is provided on one side of the protective helmet associated with the left side of the head of a user, and attachment is provided on one side of the protective helmet associated with the right side of the head of a user. If the head circumference band is fastened to the inside of the helmet shell at a front location and at a lateral location via fastening means, then the lateral location preferably lies in the rear region of the protective helmet, that is to say in the region of the occiput of a user. Such a trained safety helmet allows by an improved adaptation of the head circumference strap to the head of a user a high level of comfort and thus ensures high security. Improved placement of the head circumference band on a user's head prevents rotation about the user's vertical body axis and tilting about the horizontal axes. Due to the flexible fastening means, the distance between the head circumference band and the helmet shell can be adjusted for each position. As a result, a user of the protective helmet can adjust the head circumference band to its specific head shape, so that the protective helmet rests securely against the user's head. Through a variable combination of settings different head geometries can be easily understood.

Characterized in that the distance between the helmet shell and the head circumference band for each position, but at least one of the lateral locations is adjustable by the fastening means, also sink marks of a head can be imaged very accurately. In principle, a multiplicity of fastening means can be provided distributed over the circumference of the head circumference band. At least the laterally arranged fastening means are designed such that the distance between the head circumference band and the helmet shell is adjustable for each position.

Preference is given to a protective helmet, in which the head circumference band is additionally fastened at a rear location relative to the longitudinal direction of the protective helmet by fastening means on the inside of the helmet shell. This means that the fastenings of the head circumference band are provided in the area of the front head side, preferably in the region of the longitudinal axis of the protective helmet, on each side of the protective helmet and in the rear area of the protective helmet, preferably also in the region of the longitudinal axis of the protective helmet. In this case, the rear position may be formed such that the distance between the head circumference band and the helmet shell at the rear position is adjustable. One or more attachment means can not be designed to be adjustable. In particular, non-adjustable fastening means can be provided at the front location, that is to say the front head side, and optionally at the rear location, that is to say at the back of the head, of the protective helmet. In addition, a further fastening means can be arranged on the back of the head, which allows a variable adjustment of the circumference of the head circumferential band. For this purpose, the further fastening means may have an externally accessible rotating means, such as an adjusting wheel.

The fastening means preferably protrude radially or approximately radially from the head circumference band in the direction of the helmet shell and can be adapted in their length. Preferred is a protective helmet in which at least four, preferably five or more, fastening means are provided over the circumference of the head circumferential band. Particularly preferred is a protective helmet in which at least two further fastening means are arranged on each side, that is to say in addition to a fastening means at the front location and a fastening means at the rear location. The more fasteners are provided, the finer the head circumference band can be adjusted to the particular head shape of a user.

The terms front, back and side of the helmet refer to a longitudinal orientation of the helmet. That is, the front portion is disposed on the side of the protective helmet facing the forehead of the user. The back is located on the back of the helmet, which faces the back of the user's head. The front and the back of the helmet can lie on the longitudinal axis of the helmet. For the purposes of the invention, front and rear locations are also understood to mean locations on the front side and on the rear side of the protective helmet, which are arranged on the left or right of the longitudinal axis of the protective helmet. The front part is in particular in the front area of the user and the rear part is arranged in particular in the region of the back of the head when the protective helmet is worn.

The fixing points for fixed and variable fastening means can be arranged distributed on the head circumference band. Preference is given to a protective helmet, in which adjacent attachment points are equidistant or approximately equidistant from each other. As a result, the head circumference band can be optimally adjusted to the corresponding head shape of a user.

The adjustable fastening means can be designed in various ways. According to a preferred embodiment of the invention may be provided in a protective helmet, that the fastening means are rigid and are releasably secured with its first end to the inside of the helmet shell and with its second end to the head circumference band. The fastening means may be attached directly or indirectly to the head circumference band and the helmet shell. The protective helmet preferably has a multiplicity of identical and differently long, rigidly formed fastening means. The adjustment of the head circumference tape on the appropriate head shape of a user by using fasteners of appropriate length. This means, depending on the shape of the head, example, a short, a medium-length or a long fastening means are arranged at a certain point between the head circumference band and the inside of the helmet shell. This can be done at any point between the head circumference band and the inside of the helmet shell, so that can be adjusted by the choice of the length of the rigidly formed fastening means, the distance between the head circumference band and the inside of the helmet shell. Such trained rigid fasteners are therefore a kind of pressure rods. In particular, the rigid fastening means are fixed immovably to the inside of the helmet shell and the head circumference band. This prevents the distance between the head circumference band and the helmet shell from changing during wear of the protective helmet. By fixing a fastener, the distance can be set at a location between the inside of the helmet shell and the head circumference band fixed. The distance can be varied by using a shorter or longer fastener. For optimum adaptation of the head circumference band to a specific head shape, the circumference of the head circumference band is first adjusted to the circumference of the head. This can be done in particular by an externally accessible rotating means at the rear of the helmet. Subsequently, by appropriate selection of the rigidly formed fastening means at the correspondingly provided points, the distance of the head circumference strip to the inside of the helmet shell can be adjusted. The rigid fastening means are thereby fixed both on the head circumference band and on the inside of the helmet shell. This can be done in different ways. The attachment can be done in particular non-positively. It is also conceivable that as an alternative or in addition to a non-positive fastening of the fastening means on the head circumference band and on the helmet shell, a positive fastening is provided. The fasteners are releasably secured so that their replacement can be easily ensured.

Such rigid fasteners have the advantage that both elevations and sink marks of the head can be easily replicated by them.

In particular, the rigid fastening means can also be designed as stud bolts, set screws or clamping screws. As a result, the distance between the head circumference band and the helmet shell can be shortened or lengthened at any point where such fastening means are provided by rotation of the stud bolt, the threaded pin or the tightening screw. According to a particularly preferred embodiment of the invention may be provided in a protective helmet, that the fastening means are movably, in particular via film hinges, arranged on the head circumference band and / or on the helmet shell. This allows a low residual flexibility to be maintained, so that the fasteners do not press on the head. For example, the attachment means can be arranged on the helmet shell and / or on the head circumference band such that a certain flexibility remains between the attachment means and the helmet shell or the head circumference band. In this way, for example, the angle at which each fastening means is connected to the helmet shell and / or the head circumference band can be slightly varied. In particular, the fastening means may be molded on the helmet shell and / or on the head circumference band such that they are resilient. Thus, a fastening means may be attached at least on one side via a film hinge to the helmet shell and / or the head circumference band. In this way, despite the use of a self-rigid plastic fastening means, a flexibility in the attachment of the fastener to the helmet shell and / or the head circumference band can be maintained, so that despite good adaptation of the head circumference band to the head of a user, the head circumference band does not press in the area of the attachment points , Alternatively or additionally, the fastening means can be fastened to the helmet shell and / or the head circumference band via rivet connections or push-button connections. For example, a plurality of push-button receptacles may be arranged on the helmet shell, so that a fastening means, which has a push button at one end, can be fastened at different locations to vary the distance between the helmet shell and the head circumference band. Alternatively or additionally, snap button receptacles can also be arranged on the outside of the head circumference band.

The fastening means may be formed of metal. But these are preferably made of plastic.

As an alternative to a protective helmet, in which the change of the distance takes place via rigid fastening means, a protective helmet is preferred, in which each fastening means comprises a cable and a rotary closure over which the distance is adjustable. Thus, at least at the lateral locations of the distance between the head circumference band and the helmet shell can be variably adjusted. Thus, in such a fastener a rope both be attached or guided on the inside of the helmet shell, as well as on the head circumference band. The cable can be rolled up or unrolled by means of a rotary closure, so that an individual adaptation to a head shape can take place in interaction with the other such fastening means. In particular, if the head shape has no sink marks, a good fit to the head shape can be achieved by means of such a protective helmet.

As an alternative to the above-mentioned protective helmets, a protective helmet is preferred in which each fastening means comprises a toothed belt and a ratchet closure over which the distance is adjustable. The principle is similar, as with fasteners that have a rope and a screw cap. The ratchet fastener preferably has a buckle and a lever. After inserting the toothed belt into the buckle of the ratchet fastener, the toothed belt can be pulled by the lever through the buckle. Thus, the distance between the head circumference band and the inside of the helmet shell can be reduced in a simple manner. To extend the distance, a device may be provided which releases the toothed belt, so that it can be pulled out of the buckle of the ratchet closure in the reverse direction. In interaction with the other such fasteners, an individual adaptation of the head circumference band can be made to a corresponding head shape. In particular, if the head shape has no sink marks, can be achieved by such a trained hard hat a good adaptation to the head shape.

According to a particularly preferred embodiment of the invention can be provided with a protective helmet, that different fastening means are provided in the protective helmet. This means that at least two of the fastening means described above can be combined with each other in a protective helmet. Thus, both rigid fastening means, in particular in the form of pressure bars, as well as fastening means comprising a cable and a rotary closure, or fastening means comprising a toothed belt and a ratchet closure can be combined. This allows a particularly good adaptation of the head circumference band to the respective head shape.

Furthermore, a protective helmet in which the head circumference band is designed as a head support ring is particularly preferred. The head support ring can be infinitely narrower or wider with one hand by means of a rotating means, in particular an adjusting wheel, without having to remove the protective cover for this purpose. The headstrap ring can be padded so that can be safely avoided. Incidentally, the head circumference band can also be upholstered.

Furthermore, a protective helmet is preferred, which has an inner shell, which is fastened to the inside of the helmet shell, and in which the head circumference band relative to the longitudinal direction of the protective helmet at a front location and on each side of the helmet each at least at a lateral location is attached via the fastening means on the inner shell, wherein at least arranged at the lateral locations fastening means are formed such that the distance between the head circumference band and the inner shell is adjustable at least one of the lateral locations. In such a trained protective helmet, the head circumference band can be easily adapted to a corresponding head shape by the distance of the head circumference band to the inner shell, in particular the inside of the inner shell, is set at different locations. The distance between the head circumference band and the inner shell can be set particularly easily in a protective helmet designed in this way, since there is free space for the fastening means or the actuation of the fastening means between the inner shell and the helmet shell. Therefore, such a protective helmet ensures a particularly high level of comfort and correspondingly high safety. The improved investment of the head circumference band or the head support ring on the head shape of a user, a rotation about the vertical body axis of the user and tilting about the horizontal axes of the user are reliably prevented. In addition, based on the longitudinal direction of the protective helmet, the head circumference band can also be fastened at a rear location via the fastening means on the inner shell. Particularly preferably, scales may be provided at the points or in the region of the points at which the head circumference band is fastened to the helmet shell, indicating the different settings. The scales are designed so that a user can recognize how the attachment is adjusted at each location. For example, a so-called normal setting can be displayed. In addition, further displays can be provided by which the user recognizes whether a narrower or a further adjustment has been made at each location in comparison to the normal setting. It is also conceivable that number scales are provided which indicate to the user a specific setting of the respective fastening point. With the help of the scales, the user can easily adjust his fitting for him. The invention will be described in detail below with reference to the accompanying drawings with reference to preferred embodiments. It is understood that all representations in the figures are schematic and not to scale. The figures and the following description thereof are in substance related to features useful for understanding the invention. Show it:

1 a head with a protective helmet,

2 is a sectional view through a protective helmet, which is formed according to the construction principle according to the invention, wherein the head circumference band of the protective helmet is set to a first head shape,

3 shows a sectional view through the protective helmet according to FIG. 2, in which the head circumference band is set to a second head shape, FIG.

4 shows a sectional view through the protective helmet according to FIG. 2, in which the head circumferential band is set to a third head shape, FIG.

5 shows a sectional view through the protective helmet according to FIG. 2, in which the head circumference band is set to a fourth head shape,

6a to 6e respectively in a sectional view different head shapes,

7 is a side view of a rigid fastener,

Fig. 8 is a side view of a second rigid fastener, between the

Helmet shell and the head circumference band of a protective helmet is arranged,

9 is a side view of a third rigid fastener that between the

10 is a side view of a fastening means which is arranged by means of a film hinge and a push-button connection between the helmet shell and the head circumference band of a protective helmet, Fig. 1 1 shows a side view of a fastening means which is arranged by means of a film hinge and recesses between the helmet shell and the head circumference band of a protective helmet, and Fig. 12 is a sectional view through another protective helmet, which is formed according to the inventive design principle, wherein the head circumference band an inner shell of the helmet is attached.

In FIGS. 1 to 10, elements having the same function and mode of operation are provided with the same reference numerals.

Fig. 1 shows schematically a head 4 with a protective helmet 1. The aim is that the protective helmet 1 is very well adapted to the head 4, so that it ensures a user a high level of comfort and thus high security. That is, by an improved investment of the protective helmet 1 to the head 4, a rotation about the vertical body axis 20 of the user and a tilt about the horizontal axes 21, 22 are prevented.

In Fig. 2 is a sectional view of a protective helmet 1 is shown, which is formed according to the construction principle of the invention, wherein the head circumference band 3 of the protective helmet 1 is set to a first head shape. The protective helmet 1 has a helmet shell 2 and a head circumference band 3, which serves to rest against the head 4 of a user. The head circumference band 3 fits snugly against the head 4 of a user and thereby ensures a high level of wearing comfort and high safety. In Fig. 1, the head 4 and thus the head circumference band 3 an elliptical or an approximately elliptical shape.

The head circumference band 3 is relative to the longitudinal direction 5 of the protective helmet 1 at a front location 6, at a rear location 7 and on each side of the protective helmet 1 respectively at two locations 8, 9 via fastening means 10 on the inner side 1 1 of the helmet shell 2, in particular non-positive, fastened. At the lateral points 8, 9, the fastening means 10 are formed such that the distance 12 between the head circumference band 3 and the helmet shell 2 for each lateral position 8, 9 is adjustable. At the front point 6 and at the rear point 7, the fastening means 10 are not adjustable in this embodiment of the protective helmet 1. As a result, the position of the head circumference band 3 is fixed to the helmet shell 2 in the longitudinal direction 5. This ensures that the head circumference Fangband 3 is always approximately centered in the helmet shell 2 is arranged, that is always a certain distance 12 between the head circumference band 3 and the helmet shell 2 is given. The fastening means 10 are rigid. With their first end, the rigid fastening means 10 on the inner side 1 1 of the helmet shell 2 and with its second end, the rigid fastening means 10 are releasably secured to the head circumference band 3. Depending on how long the rigid fastening means 10 are, the distance 12 at each lateral point 8, 9 between the head circumference band 3 and the helmet shell 2 can be adjusted. That is, a user of the protective helmet 1 can select from a variety of equal and different lengths of rigid fasteners 10, through which the distance 12 of the head circumference band 3 is set to the helmet shell 2 such that the head circumference band 3 exactly matches the shape of his head 4. The use of rigid fasteners 10 also allows the imaging of head geometries with sink marks. The rigid fastening means 10 are designed such that, when fastened to a lateral location 8, 9 between the head circumference band 3 and the helmet shell 2, they keep the distance 12 between the head circumference band 3 and the helmet shell 2 constant at this point 8, 9. In order to change the distance 12 of the head circumference band 3 to the helmet shell 2 at the lateral locations 8, 9, the user can simply exchange the existing rigid attachment means 10 for shorter or longer. For this purpose, the fastening means 10 are detachably fastened to the inner side 11 of the helmet shell 2 and to the head circumferential band 3. The fastening of the fastening means 10 on the helmet shell 2 and on the head circumference band 3 can be done in particular via screw, clamp, snap or plug connections. For this purpose, on the inside 1 1 of the helmet shell 2 and on the head circumference band 3 corresponding fastening elements 14, such as projections, pins, intersections, holes, threads, recess, locking receptacles, etc., as shown by way of example in FIGS. 8 and 9, be provided.

Fig. 7 shows schematically in a side view a rigid fastener 10. The rigid fastener 10 has an elongated profile. The fastening means 10 may be formed as a round push rod. The cross section of the fastening means 10 may also be differently shaped, in particular polygonal, formed. At the two ends, the fastening means 10 each have an undercut, which serves for the releasable attachment of the fastening means 10 on the inner side 1 1 of the helmet shell 2 and the head circumferential band 3. The attachment of such a fastener 10 on the inside of the 1 1 Helmet shell 2 and on the head peripheral band 3 of a protective helmet 1 is shown in Figs. 8 and 9. In FIG. 8, a relatively long fastening means 10 is used, in FIG. 9 a relatively short fastening means 10. As a result, the distance 12 between the helmet shell 2 and the head circumferential band 3 is different in the two variants of the protective helmet 1. The fastening means 10 can be hung in one of these embodiments of the protective helmet 1 with one end on a fastener 14 on the inside 1 1 of the helmet shell 2 and preferably locked. The other end of the fastener 10 can be put on the head circumference band 3 and clamped to obtain a releasable fixation.

10 shows schematically in a side view a fastening means 10, which is arranged by means of a film hinge 19 and a push-button connection 16, 17 between the helmet shell 2 and the head peripheral band 3 of a protective helmet 1. That is, the fastening means 10 is molded onto the helmet shell 3 via a film hinge 19 and thereby held movably on the helmet shell 3. The other end of the fastener 10 is flexibly attached via a push-button connection 16, 17 on the head circumference band 3. The head circumference band 3 has a plurality of pressure button receivers 16 arranged one below the other and / or next to each other. At the rigid fastening means 10, a push button 17 is arranged, which can be attached to one of the push-button receptacles 16. As a result, the distance between the helmet shell 2 and the head circumference band 3 can be adjusted flexibly and thus the head circumference band 3 can be adapted to any head shape.

Fig. 1 1 shows schematically in a side view a fastening means 10, which is arranged by means of a film hinge 19 and recesses 18 between the helmet shell 2 and the head peripheral band 3 of a protective helmet 1. The fastener 10, that is, the push rod is inserted into one of the recesses 18 and held there. This can be done for example via latching or clamping connections. The recesses 18 are assigned a number scale 23, whereby the user can recognize the respective setting of the head circumference band 3 to the helmet shell 2. As an alternative to a numerical scale, the scale 23 may have only dashes, for example. On the basis of the scale 23, the user can easily adjust his for him correct attachment of the head circumference band 3 to the helmet shell 2. A scale 23 may be assigned to each type of fastening between the head circumference band 3 and the helmet shell 2. The fastening means 10 may also be designed as stud bolts, set screws or clamping screws. As a result, the distance 12 between the head circumference band 3 and the helmet shell 2, for example, by a rotation of the stud, the threaded pin or the clamping screw, shortened or lengthened at each lateral point 8, 9, are provided at the attachment means 10 such.

FIGS. 3 to 5 each show a sectional view of the protective helmet 1 according to FIG. 2, wherein the head circumferential band 3 points to a second head shape, see FIG. 3, to a third head shape, see FIG. 4, to a fourth head shape, see FIG .5, is set. The distance 12 between the head circumference band 3 and the helmet shell 2 has been shortened or extended to depict the various head shapes at the corresponding locations 8, 9. Because the distance 12 between the helmet shell 2 and the head circumference band 3 can be adjusted for each position 8, 9 by means of the fastening means 10, lateral sink marks of an elongated head 4 can also be imaged very precisely. In principle, a plurality of fastening means 10 can be provided distributed over the circumference of the head circumference band 3.

Fig. 12 shows schematically in a sectional view another protective helmet 1, which is formed according to the construction principle according to the invention. The protective helmet 1 has a helmet shell 2, an inner shell 13 and a head circumference band 3. The head circumference band 3 is not attached to the inner side 1 1 of the helmet shell 2, but to the inner shell 13. The inner shell 13 is fixedly secured to the helmet shell 2 via corresponding detents 15. By replacing the respective fastening means 10, the distance 12 between the inner shell 13 and the head circumference band 3 can be adjusted for each position 8, 9. Otherwise, the same advantages apply to this protective helmet 1, as have been carried out in detail in the protective helmet 1 without the inner shell 13.

The present explanation of the embodiments describes the invention only in the context of examples. Of course, individual features of the embodiments, if technically feasible, can be combined freely with one another, without departing from the scope of the present invention. B ez ugs zelenlis te hard hat

shell

Head circumference tape / head support ring

head

Longitudinal alignment of the protective helmet

front part of the safety helmet

rear part of the safety helmet

lateral part of the safety helmet

fastener

Inside of the helmet shell

distance

inner shell

fasteners

lock

Press stud receiver

push-button

deepening

Film hinge vertical body axis of a user

horizontal axis of a user

Skale

Claims

Patent claims

1 . Protective helmet (1) comprising a helmet shell (2) and a head circumference strap (3) for abutment against the head (4) of a user, the head circumference strap (3) relative to the longitudinal orientation (5) of the protective helmet (1) a front point (6) and on each side of the protective helmet (1) at least at one point (8, 9) via fastening means (10) on the inside (1 1) of the helmet shell (2) is fixed, characterized in that at least the fastening means (10) arranged at the lateral points (8, 9) are designed such that the distance (12) between the head circumferential band (3) and the helmet shell (2) can be adjusted at at least one of the lateral points (8, 9) ,

2. Protective helmet (1) according to claim 1, characterized in that at a front location (6) and optionally at a rear point (7) of the protective helmet (1) non-adjustable fastening means (10) are provided.

3. Protective helmet (1) according to claim 1 or 2, characterized in that the head circumference strip (3) relative to the longitudinal alignment (5) of the protective helmet (1) additionally at a rear location (7) via fastening means (10) on the inside ( 1 1) of the helmet shell (2) is attached.

4. Protective helmet (1) according to claim 3, characterized in that the rear point (7) is designed such that the distance (12) between the head circumference band (3) and the helmet shell (2) at the rear point (7) adjustable is.

5. Protective helmet (1) according to one of the preceding claims, characterized in that over the circumference of the head peripheral band (3) at least four, preferably five or more, fastening means (10) are provided.

6. Protective helmet (1) according to one of the preceding claims, characterized in that adjacent fastening points (6, 7, 8, 9) are equidistant or approximately equidistant from each other.

7. A protective helmet (1) according to any one of the preceding claims 1 to 6, characterized in that the fastening means (10) are rigid and with their first end on the inside (1 1) of the helmet shell (2) and with its second end on the head circumference band (3) are releasably attached.

8. Safety helmet (1) according to claim 7, characterized in that the fastening means (10) are designed as stud bolts, set screws or clamping screws.

9. A protective helmet (1) according to one of the preceding claims, characterized in that the fastening means (10) are arranged movably, in particular via film hinges (19) on the head circumference band (3) and / or on the helmet shell (2).

10. Protective helmet (1) according to one of the preceding claims 1 to 6, characterized in that each adjustable fastening means (10) comprises a cable and a rotary closure over which the distance is adjustable.

1 1. Protective helmet (1) according to one of the preceding claims 1 to 6, characterized in that each adjustable fastening means (10) comprises a toothed belt and a ratchet closure over which the distance is adjustable.

12. A protective helmet (1) according to any one of the preceding claims, characterized in that different fastening means (10) in the protective helmet (1) are provided.

13. A protective helmet (1) according to any one of the preceding claims, characterized in that the head circumferential band (3) is designed as a head support ring.

14. A protective helmet (1) according to any one of the preceding claims, characterized in that the protective helmet (1) has an inner shell (13) which on the inside (1 1) of the helmet shell (2) is fixed, and that the head circumference band (3 ) relative to the longitudinal alignment (5) of the protective helmet (1) at a front location (5) and on each side of the protective helmet (1) at least at one point lateral (8, 9) via the fastening means (10) on the inner shell ( 13) is fastened, wherein at least at the lateral locations (8, 9) arranged fastening means (10) are formed such that the distance between the head circumference band (3) and the inner shell (13) at at least one of the lateral points (8, 9) is adjustable.

15. A protective helmet (1) according to one of the preceding claims, characterized in that the fastening means (10) are formed from plastic.