U.S. patent application number 13/199791 was filed with the patent office on 2012-03-15 for protective helmet; method for mitigating or preventing a head injury.
Invention is credited to Oliver Schimpf.
Application Number | 20120060251 13/199791 |
Document ID | / |
Family ID | 44582007 |
Filed Date | 2012-03-15 |
United States Patent
Application |
20120060251 |
Kind Code |
A1 |
Schimpf; Oliver |
March 15, 2012 |
Protective helmet; Method for mitigating or preventing a head
injury
Abstract
Disclosed is a protective helmet and a method for mitigating or
preventing a head injury, in which a shock-absorbing, or
shock-absorbing and comfort-providing, inner wearing unit, which
can comprise liners, comfort pads, protective pads, nubbed cages
and/or strapped wearing units (for example spider-shaped wearing
elements, wearing straps, head bands or the like), is divided into
a shell-side insert and a head-side insert, which can be
counter-rotated (preferably starting from application of a
predetermined force) in at least one direction, wherein a sliding
surface is provided that assumes the function of a rotational
surface, so that the angular acceleration introduced by a blow is
drastically reduced or prevented because the head-side insert and
the shell-side insert, and thus the head of the wearer and the
outer helmet shell, can be counter-rotated quickly and without
impediment, preferably in all directions.
Inventors: |
Schimpf; Oliver;
(Braumschweig, DE) |
Family ID: |
44582007 |
Appl. No.: |
13/199791 |
Filed: |
September 9, 2011 |
Current U.S.
Class: |
2/5 ; 2/411;
2/6.1; 2/6.6 |
Current CPC
Class: |
A42B 3/064 20130101 |
Class at
Publication: |
2/5 ; 2/411;
2/6.1; 2/6.6 |
International
Class: |
A42B 3/12 20060101
A42B003/12; F41H 1/04 20060101 F41H001/04 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 9, 2010 |
DE |
10 2010 045 843.0 |
Sep 10, 2010 |
DE |
10 2010 046 134.2 |
Claims
1. A protective helmet for a head, comprising an outer shell
produced from a hard material, and an inner wearing unit that
absorbs an impact to the head and is disposed on an inner face of
the outer shell, the inner wearing unit being divided into a
shell-side insert and a head-side insert, with a side of the
head-side insert facing away from the head comprising a sliding
surface at least in some regions, and mutually facing sides of the
head-side insert and the shell-side insert corresponding to one
another at least partially, the shell-side insert being rotatable
relative to the head-side insert in at least one direction.
2. The protective helmet according to claim 1, wherein the sliding
surface is a spherical surface and/or a rotationally symmetrical
body.
3. The protective helmet according to claim 1, wherein the
head-side insert and the shell-side insert have different
densities.
4. A protective helmet according to claim 1, wherein densities that
occur in head-side insert and/or in the shell-side insert vary.
5. A protective helmet according to claim 1, wherein the head-side
insert and/or the shell-side insert have surfaces with no
irregularities.
6. A protective helmet according to claim 1, wherein the head-side
insert and/or the shell-side insert have golf ball structured
surfaces so as to countersink the imprints of nozzles in a EPS
shaping process and prevent irregularities on the surface.
7. A protective helmet according to claim 1, wherein an
intermediate layer is disposed between the head-side insert and the
shell-side insert.
8. The protective helmet according to claim 7, wherein the
intermediate layer is rigidly connected to the head-side insert or
the shell-side insert.
9. The protective helmet according to claim 1, wherein the
intermediate layer is harder than the head-side insert.
10. A protective helmet according to claim 1, wherein the head-side
insert and/or the shell-side insert are connected to one another by
at least one connecting means.
11. The protective helmet according to claim 10, wherein the
connecting means comprises at least one predetermined breaking
point.
12. A protective helmet according to claim 1, wherein the head-side
insert has at least one elevation on the side facing the shell-side
insert.
13. The protective helmet according to claim 12, wherein the
elevation comprises at least one predetermined breaking point.
14. The protective helmet according to claim 12, wherein the
elevation cooperates with a damping means.
15. A protective helmet according to claim 12, wherein the
elevation projects into the shell-side insert.
16. A protective helmet according to claim 1, comprising an
indicator that indicates that the shell-side insert has rotated
and/or is rotated relative to the head-side insert.
17. A protective helmet according to claim 1, wherein the head-side
insert and/or the shell-side insert comprise nubbed cages or the
like.
18. A protective helmet according to claim 1, wherein the
protective helmet is a car racing helmet, a winter sports helmet, a
riding helmet, a bicycle helmet, a mountain climbing helmet, an
industrial safety helmet, a police helmet, a firefighter's helmet,
a jet fighter helmet, a military helmet or the like.
19. A method for mitigating or reducing a head injury resulting
from a blow caused by a rotary motion by means of a protective
helmet, the protective helmet comprising an outer shell produced
from a hard material and an inner wearing unit that absorbs impact
on the head and is disposed on the inner face of the outer shell
the inner wearing unit being divided into a shell-side insert and a
head-side insert, with a side of the head-side insert that faces
away from the head comprising a spherical surface at least in some
regions, and the mutually facing sides of the head-side insert and
the shell-side insert corresponding to one another at least
partially, so that the shell-side insert is rotated relative to the
head-side insert by a striking blow.
20. The method of providing a protective helmet according to claim
1.
Description
BACKGROUND OF THE INVENTION
[0001] Many protective helmets are known, which are used to protect
the head of a wearer from injuries. These protective helmets are
adapted to the human head, which, when seen from above, has an oval
shape, which can be classified as a "round oval" shape or a "long
oval" shape. Protective helmets that are ordinarily on the market
assume this shape in order to resemble the human head, and in
particular so as to have a narrow appearance. Narrow helmets which,
as seen looking only from the front, appear to be small, sell well
on the market. Round helmets which, as seen looking from the front,
appear to be wide, are not successful on the market.
[0002] In general, these protective helmets, which can have various
configurations depending on the field of application, comprise: an
outer shell, which is produced from a hard material and typically
has a basic oval shape; and a shock-absorbing inner wearing unit,
which absorbs impacts to the head and is disposed on the inner face
of the outer shell and likewise has an oval shape on the side that
faces the human head (inner face). The disadvantage of these
protective helmets is that, while they offer protection from blows
striking the protective helmet or the bump cap thereof
translatorily, they offer no protection from rotatory forces acting
during the blow, so that, for example, many accidents result in
severe head injuries despite the use of a protective helmet.
[0003] The European patent specification EP 0 790 787 B1 describes
protective headgear, on the outer shell of which a sliding surface
is disposed. A thin, tough skin is disposed on this sliding surface
and slides on the hard outer shell of the protective helmet during
the action of a blow, whereby angular acceleration of the head
caused by the blow is reduced, because the skin acts on the outer
face in the manner of the epicranium of the human head. It must be
regarded as disadvantageous that the outward appearance of the
protective helmet is negatively influenced by the skin.
[0004] So as not to negatively influence the outward appearance,
the European patent specification EP 1 246 548 B1 describes a
protective helmet in which a thin sliding shell is introduced
between the inner shell and the outer shell. The inner shell is
thus rotated relative to the outer shell and reduces the angular
acceleration that is introduced. The disadvantage of this solution
is that the rotary motion is inhibited by the oval shape of the
helmet in the general form thereof.
[0005] The European patent specification DE 696 34 862 T2 proposes
a protective helmet in which an inner wearing unit made of
synthetic resin foam is disposed on the inside of the hard, outer
shell, wherein the inner wearing unit is composed of a primary
insert part and a secondary insert part, which is fitted in a
cut-out provided in the primary insert part. The density of the
secondary insert part ranges between 20% and 80% of the density of
the primary insert part. Thus, good protective action is achieved,
but this solution is very complex.
SUMMARY OF THE INVENTION
[0006] In contrast, the protective helmet according to the
invention and the method according to the invention provide for
mitigating or preventing a head injury, and has the advantage that,
by dividing the shock-absorbing, or shock-absorbing and
comfort-providing, inner wearing unit, which can comprise liners,
comfort pads, protective pads, nubbed cages and/or strapped wearing
units (for example spider-shaped wearing elements, wearing straps,
head bands or the like), into a shell-side insert and a head-side
insert, which can be counter-rotated (preferably starting from
application of a predetermined force) in at least one direction, a
sliding surface is provided that assumes the function of a
rotational surface, so that the angular acceleration introduced by
a blow is drastically reduced or prevented, because the head-side
insert and the shell-side insert, and thus the head of the wearer
and the outer helmet shell, can be counter-rotated quickly and
without impediment, preferably in all directions. The division can
relate to the shock-absorbing and/or the non-shock-absorbing part
of the inner wearing unit.
[0007] According to an advantageous embodiment of the protective
helmet according to the invention, the sliding surface is a
spherical surface, which may be defined by portions of the
hemispherical body, and/or a rotationally symmetrical body (for
example, rotational ellipsoids and the like) alone.
[0008] According to a further advantageous embodiment of the
protective helmet according to the invention, the head-side insert
and the shell-side insert have different densities. The inner
wearing unit can be produced from closed-cell and/or open-cell
foams. In general, all materials that are suited for absorbing
shocks in protective helmets are conceivable. This also includes
soft foams, which are only used for comfort padding, nubbed cages
or other wearing units.
[0009] According to a further advantageous embodiment of the
protective helmet according to the invention, the densities inside
the head-side insert and/or inside the shell-side insert vary. This
makes it possible to adapt the material to the special
requirements, in accordance with the geometry of the protective
helmet in the different regions thereof, which can be subject to
various requirements in terms of the strength of the material used.
To this end, the use of liners made of foamed materials, and
preferably particle foam materials (particle foams), notably
expanded polystyrene (EPS), expanded polypropylene (EPP),
polyurethane (PU), or the like, is advantageous. In general,
separate segments are produced for the different regions. The
density of the individual components is adapted to the regional
variances. Subsequently, the components are joined by means of plug
connections, adhesive connections or foamed connections.
[0010] Moreover, components produced by means of multi-zone foaming
(multi-density), having up to 3 different densities in one
component, can be used, preferably as dual-density liners. To this
end, the density is varied within a component in a two-stage
process. The individual zones are delimited by slides, so as to
produce these components. The zones are filled separately and
prefabricated. During the shaping process, the slides are pulled
from the tool and the beads of the individual zones are welded to
one another to form a component. With this method, precisely
delimited regions having various densities can be produced. As an
alternative, it is also possible to produce a component having
various densities using a single-stage process, by deliberately
filling the tool regions in part utilizing the filling pressure or
by means of an air curtain. With these methods, the differently
prefoamed beads mix at the boundaries. This results in components
having transitional regions with average densities at the zone
boundaries.
[0011] The combination of the two technologies is also
advantageous. For this purpose, large segments are produced using
multi-density methods, in particular dual-density methods, and
combined with smaller segments having a simpler design.
[0012] According to a further advantageous embodiment of the
protective helmet according to the invention, the head-side insert
and/or the shell-side insert have surfaces with no irregularities
that are caused by spraying in the EPS process, because a process
using a locally nozzle-free tool is employed or because a tool
having a porous surface is used.
[0013] According to a further advantageous embodiment of the
protective helmet according to the invention, the head-side insert
and/or the shell-side insert have (golf ball) structured surfaces
so as to countersink the imprints of the nozzles in the EPS shaping
process and prevent irregularities on the surface.
[0014] According to a further advantageous embodiment of the
protective helmet according to the invention, an intermediate layer
is disposed between the head-side insert and the shell-side insert.
The intermediate layer can positively affect the shock absorption
if it is particularly rigid and, for example, produced from carbon
fibers. If no full intermediate layer is present, for example,
punctiform, star-shaped or crosswise sliding sites, are
conceivable. It is also conceivable for the intermediate layer to
be a liquid or a gel. In this case, the viscosity of the liquid or
the gel is adjusted so that it can be used to achieve various
friction coefficients (shear values) and thus various
accelerations. In this way, the angular acceleration progression
can be adjusted.
[0015] According to a relevant advantageous embodiment of the
protective helmet according to the invention, the intermediate
layer is rigidly connected to the head-side insert or the
shell-side insert.
[0016] According to a further advantageous embodiment of the
protective helmet according to the invention, the intermediate
layer is harder than the head-side insert.
[0017] According to a further advantageous embodiment of the
protective helmet according to the invention, the head-side insert
and the shell-side insert are connected to one another by at least
one connecting means. It is conceivable for this connecting means
to be a press-fitted EPS body, which can additionally absorb energy
for shock absorption (keyword: rigid mounting). It is also
conceivable for this connecting means to be a spring shock absorber
system, which returns the system to the starting position. A
preferred embodiment can be rubber bands (for example in double-T
shape) (keyword: floating mounting).
[0018] According to a relevant advantageous embodiment of the
protective helmet according to the invention, the connecting means
comprises at least one predetermined breaking point.
[0019] This predetermined breaking point can also be a textile
structure, which tears open at a controlled force. The
predetermined breaking point can also be provided in the connecting
means, preferably an EPS cylinder or cone (dowel). This cylinder is
preferably exactly adjusted to the respective test standard with
respect to the break-away force thereof. Variations are conceivable
by way of the relative density, bead size and diameter of the
predetermined breaking point, with the defined break-away also
being possible by means of a metal cutting plate.
[0020] According to a further advantageous embodiment of the
protective helmet according to the invention, the head-side insert
has at least one elevation on the side that faces the shell-side
insert.
[0021] According to a relevant advantageous embodiment of the
protective helmet according to the invention, the elevation
comprises at least one predetermined breaking point. This
predetermined breaking point can be designed such that a signal is
triggered when the predetermined breaking point ruptures. It is
thus possible to signal, in any manner, that the system was
functional and that the helmet can no longer be used. In addition,
an SOS emergency signal can also be transmitted.
[0022] According to a further advantageous embodiment of the
protective helmet according to the invention, the elevation
cooperates with a damping means. A design element, which holds the
shells in position and collapses in a controlled fashion upon
impact, is preferably disposed around the elevation.
[0023] According to a further advantageous embodiment of the
protective helmet according to the invention, the elevation
protrudes into the shell-side insert.
[0024] According to a further advantageous embodiment of the
protective helmet according to the invention, an indicator
indicates that the shell-side insert has rotated and/or is rotated
relative to the head-side insert. The indicator is preferably
visible on the outside and/or inside and indicates that the system
was triggered. This is particularly important after an accident,
because protective helmets often times appear to be intact
outwardly, although they have had to absorb large amounts of
energy. The indicator indicates that the system has moved and thus
rotational energy has been absorbed.
[0025] According to a further advantageous embodiment of the
protective helmet according to the invention, the head-side insert
and the shell-side insert comprise nubbed cages or the like as the
wearing units.
[0026] According to a further advantageous embodiment of the
protective helmet according to the invention, the protective helmet
is a motorcycle helmet, a car racing helmet, a winter sports helmet
(skiing or snow boarding helmet), a riding helmet, a bicycle
helmet, a mountain climbing helmet, an industrial safety helmet, a
police helmet, a firefighter's helmet, a jet fighter helmet, a
military helmet or the like.
[0027] A molded part can preferably be joined to the shell if the
wall thickness of the EPS part becomes too thin at the edges of the
two shells (the head-side insert and the shell-side insert). This
molded part can support smooth sliding of the system, and
accommodate additional functional parts of the helmet (for example
foams, straps, textile components).
[0028] A chin strap fastening point (KBP) can preferably be
provided in the vicinity of the pivot of the rotational system
(RDP) or at least on the connecting line between a chin strap
fastening point (KBP) and a chin strap support point (KAP). An
additional functional part can be used to bring the position of the
chin strap to the connecting line of the (RDP) and the support
point of the chin strap (KAP) in the case of a rotational
function.
[0029] In another advantageous arrangement, the chin strap can be
attached on a rotational line around the pivot of the rotational
system. The chin strap can always maintain the same distance from
the rotational pivot on this line. In the case of particularly
large displacements, the chin strap slides against a stop and is
then tightened in a controlled manner. This arrangement fulfills
the function of a strap tensioner upon impact with a rotary
motion.
[0030] According to an advantageous embodiment of the method
according to the invention for mitigating or preventing a head
injury resulting from a blow caused by rotary motion by means of a
protective helmet, wherein the protective helmet comprises an outer
shell produced from a hard material and an inner wearing unit that
absorbs impact on the head and is disposed on the inner face of the
outer shell, and wherein the inner wearing unit is divided into a
shell-side insert and a head-side insert, wherein the side of the
head-side insert facing away from the head has a spherical surface
at least in some regions and the mutually facing sides of the
head-side insert and shell-side insert correspond to one another at
least partially, so that the striking blow rotates the shell-side
insert relative to the head-side insert, a protective helmet.
[0031] Further advantages and advantageous embodiments of the
invention will be apparent from the following description, the
drawings, and the claims.
[0032] The drawings show exemplary embodiments of the subject
matter of the invention and will be described in detail
hereafter.
BRIEF DESCRIPTION OF THE DRAWINGS
[0033] FIGS. 1 and 2 are sectional views of a conventional
protective helmet;
[0034] FIGS. 3 and 4 are sectional views of a first embodiment of a
protective helmet according to the invention;
[0035] FIG. 5 is an exploded view of a second embodiment of a
protective helmet according to the invention;
[0036] FIGS. 6 and 7 are sectional views of the protective helmet
according to the invention in FIG. 5;
[0037] FIGS. 8 to 10 show the operating principle of the protective
helmet according to the invention in FIG. 5 during a blow from
behind;
[0038] FIG. 11 shows the operating principle of the protective
helmet according to the invention in FIG. 5 during a blow from the
front;
[0039] FIG. 12 is a sectional view of a third embodiment of a
protective helmet according to the invention;
[0040] FIG. 13 shows the operating principle of the protective
helmet according to the invention in FIG. 12 during a blow from the
front;
[0041] FIG. 14 is a sectional view of a fourth embodiment of a
protective helmet according to the invention;
[0042] FIG. 15 shows the operating principle of the protective
helmet according to the invention in FIG. 14 during a blow from the
front;
[0043] FIG. 16 is a sectional view of a fifth embodiment of a
protective helmet according to the invention;
[0044] FIG. 17 shows the operating principle of the protective
helmet according to the invention in FIG. 16 during a blow from
behind;
[0045] FIGS. 18 and 19 show front views of a protective helmet
according to the invention;
[0046] FIG. 20 shows the operating principle of the protective
helmet according to the invention in FIG. 18 during a blow from the
side;
[0047] FIG. 21 is a sectional view of a sixth embodiment of a
protective helmet according to the invention;
[0048] FIG. 22 is an exploded view of an inner wearing unit of a
protective helmet according to the invention;
[0049] FIGS. 23 to 25 are detailed views of the inner wearing unit
according to FIG. 22;
[0050] FIG. 26 is a perspective view of a protective helmet
according to the invention comprising the inner wearing unit in
FIG. 22, and
[0051] FIG. 27 shows the operating principle of the protective
helmet according to the invention of FIG. 22 during a blow from
behind.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0052] FIG. 1 and FIG. 2 show sectional views of a conventional
protective helmet. This helmet comprises a hard outer shell 1, on
the inner face 2 of which the inner wearing unit 3 is disposed. The
inner wearing unit 3 has an inner face 4, the oval shape of which
is adapted to a human head 5 (see FIG. 2).
[0053] FIG. 3 and FIG. 4 show sectional views of a first embodiment
of a protective helmet 6 according to the invention. The
shock-absorbing, or shock-absorbing and comfort-providing, inner
wearing unit surrounded by the hard outer shell 1 is divided into a
shell-side insert 7 and a head-side insert 8, with the outer face 9
of the head-side insert 8 that faces away from the head 5 (see FIG.
4) having a spherical surface at least in some regions, and the
outer face 9 of the head-side insert 8 corresponding to the inner
face 2 of the shell-side insert 7.
[0054] The shell-side insert 7 and the head-side insert 8 of the
inner wearing unit are preferably connected to one another so that
they can be displaced freely relative to one another in all
directions, whereby they form a displaceable system. Preferably,
after displacement, this is restored to the starting position. This
can be effected, for example, by an elastic layer or an elastic
band. To this end, the trigger force of the system is always less
than the force required to return the system to the starting
position.
[0055] FIG. 5 shows an exploded view of a second embodiment of a
protective helmet 6 according to the invention. In this embodiment,
an intermediate layer 10 is disposed between the head-side insert 8
and the shell-side insert 7, this layer comprising an inner face 11
and an outer face 12 and preferably being produced from a harder
material. The outer face 13 of the shell-side insert 7 corresponds
to the inner face 2 of the outer shell 1. Likewise, the inner face
2 of the shell-side insert 7 corresponds to the outer face 12 of
the intermediate layer 10, and the outer face 9 of the head-side
insert 8 corresponds to the inner face 11 of the intermediate layer
10. The intermediate layer 10 is rigidly connected to the
shell-side insert 7 or the head-side insert 8.
[0056] FIG. 6 and FIG. 7 show sectional views of the protective
helmet 6 according to the invention of FIG. 5. The shell-side
insert 7 can be rotated around a pivot 14 on the head-side insert
8.
[0057] FIG. 8 to FIG. 10 show the operating principle of the
protective helmet 6 according to the invention of FIG. 5. During a
blow from behind, the head-side insert 8 rotates forward, together
with the outer shell 1, around the pivot 14 in the direction of the
arrow 15. Likewise, force in the direction of the arrow 16 results
in impact on the ground 17 and thus a force is applied in the
direction of the arrow 18 so that the head-side insert 8 is rotated
forward, together with the outer shell 1, in the direction of the
arrows 15.
[0058] FIG. 11 shows the operating principle of the protective
helmet 6 according to the invention in FIG. 5. During a blow from
the front, the head-side insert 8 rotates backward, together with
the outer shell 1, around the pivot 14 in the direction of the
arrow 19.
[0059] FIG. 12 shows a sectional view of a third embodiment of a
protective helmet 6 according to the invention. Here, the head-side
insert 8 and the shell-side insert 7 are connected to one another
by connecting means 20. The connecting means 20 comprise
predetermined breaking points 21, which rupture, for example,
during a blow from the front, so that the head-side insert 8
rotates backward, together with the outer shell 1, around the pivot
14 in the direction of the arrow 19 (FIG. 13).
[0060] FIG. 14 shows a sectional view of a fourth embodiment of a
protective helmet 6 according to the invention. Here, the head-side
insert 8 comprises an elevation 22, which projects into the region
of the shell-side insert 7. The elevation 22 is surrounded by a
damping means 23, which is compressed during a blow from the front,
while the head-side insert 8 rotates backward, together with the
outer shell 1, around the pivot 14 in the direction of the arrow 19
(FIG. 15). In order that the forces in each direction of movement
be equal, the damping means 23 can preferably be a foam ring, which
is introduced, for example cylindrically, in the upper region of
the protective helmet 6.
[0061] FIG. 16 shows a sectional view of a fifth embodiment of a
protective helmet 6 according to the invention. The head-side
insert 8 here comprises two elevations 22. The elevations 22
comprise predetermined breaking points 21, which rupture, for
example, during a blow from behind, so that the head-side insert 8
rotates forward, together with the outer shell 1, around the pivot
14 in the direction of the arrow 15 (FIG. 17).
[0062] FIGS. 18 and 19 show front views of a protective helmet 6
according to the invention. It is clearly apparent that the
head-side insert 8 and the shell-side insert 7 have a common pivot
14, so that, for example during a lateral blow, the head-side
insert 8 rotates together with the outer shell 1 around the pivot
14 in the direction of the arrow 24 (FIG. 20).
[0063] FIG. 21 shows a sectional view of a sixth embodiment of a
protective helmet 6 according to the invention. In this embodiment,
the head-side insert 8 and the shell-side insert 7 comprise nubbed
cages.
[0064] FIG. 22 shows an exploded view of an inner wearing unit of a
protective helmet 6. In this conceivable embodiment of the inner
wearing unit, an intermediate layer 10 is disposed between the
head-side insert 8 and the shell-side insert 7, this layer
comprising an inner face 11 and an outer face 12, and preferably
being produced from a harder material. The outer face 13 of the
shell-side insert 7 corresponds to the inner face 2 of the outer
shell 1. Likewise, the inner face 2 of the shell-side insert 7
corresponds to the outer face 12 of the intermediate layer 10 and
the outer face 9 of the head-side insert 8 corresponds to the inner
face 11 of the intermediate layer 10. The intermediate layer 10 has
straps 26 that are fixed by pins 25 and fastening means 27,
preferably elastic, and an edge 28, in which the shell-side insert
7 can be introduced. A mounting 29, which has an edge 30 in which
the head-side insert 8 can be introduced, is used to fix the
head-side insert 8.
[0065] FIGS. 23 to 25 show detailed views of the inner wearing unit
in FIG. 22. The fastening means 27 can be fixed to the mounting 29
in holes 31.
[0066] FIG. 26 shows a perspective view of a protective helmet
according to the invention comprising an inner wearing unit of FIG.
22; and FIG. 27 shows the operating principle of the protective
helmet according to the invention of FIG. 22 during a blow from
behind.
[0067] All the characteristics shown here can be essential for the
invention, both individually and in any arbitrary combination with
each other.
TABLE-US-00001 List of Reference Numerals 1 Outer shell 2 Inner
face 3 Inner wearing unit 4 Inner face 5 Head 6 Protective helmet 7
Shell-side insert 8 Head-side insert 9 Outer face 10 Intermediate
layer 11 Inner face 12 Outer face 13 Outer face 14 Pivot 15
Direction of arrow 16 Direction of arrow 17 Base 18 Direction of
arrow 19 Direction of arrow 20 Connecting means 21 Predetermined
breaking point 22 Elevation 23 Damping means 24 Direction of arrow
25 Pin 26 Strap 27 Fastening means 28 Edge 29 Mounting 30 Edge 31
Hole
* * * * *