U.S. patent application number 13/770730 was filed with the patent office on 2013-08-22 for movement device for a helmet for moving a first element of the helmet with respect to a second element of the helmet.
This patent application is currently assigned to AGV S.P.A.. The applicant listed for this patent is AGV S.p.A.. Invention is credited to Carlo Filippo RATTI, Emiliano TACCIOLI.
Application Number | 20130212785 13/770730 |
Document ID | / |
Family ID | 46001648 |
Filed Date | 2013-08-22 |
United States Patent
Application |
20130212785 |
Kind Code |
A1 |
RATTI; Carlo Filippo ; et
al. |
August 22, 2013 |
MOVEMENT DEVICE FOR A HELMET FOR MOVING A FIRST ELEMENT OF THE
HELMET WITH RESPECT TO A SECOND ELEMENT OF THE HELMET
Abstract
A movement device for a helmet for moving a first element of the
helmet with respect to a second element of the helmet is described.
The movement device includes a pivot element for pivoting about an
axis of rotation, and a pivot seat, in which the pivot element is
arranged. The pivot element includes an eccentric portion or cam,
and the pivot seat includes a first seat region and a second seat
region. The first seat region is in a position angularly offset and
linearly translated with respect to the second seat region. A first
position of the pivot element corresponds to the first seat region
and a second position of the pivot element corresponds to the
second seat region.
Inventors: |
RATTI; Carlo Filippo;
(VILLALVERNIA (AL), IT) ; TACCIOLI; Emiliano;
(SESTO SAN GIOVANNI (MI), IT) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
AGV S.p.A.; |
|
|
US |
|
|
Assignee: |
AGV S.P.A.
MOLVENA (VI)
IT
|
Family ID: |
46001648 |
Appl. No.: |
13/770730 |
Filed: |
February 19, 2013 |
Current U.S.
Class: |
2/421 ; 16/221;
16/319; 16/321; 2/410 |
Current CPC
Class: |
Y10T 16/54 20150115;
Y10T 16/5402 20150115; Y10T 16/52 20150115; A42B 3/223 20130101;
A42B 3/04 20130101 |
Class at
Publication: |
2/421 ; 16/221;
16/319; 16/321; 2/410 |
International
Class: |
A42B 3/04 20060101
A42B003/04 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 20, 2012 |
IT |
VR2012A000022 |
Claims
1. A movement device for a helmet for moving a first element of the
helmet with respect to a second element of the helmet, comprising:
a pivot element for pivoting a first element of the helmet with
respect to a second element of the helmet about an axis of
rotation, and a seat of rotation for the pivot element, wherein the
pivot element is located at least partially in the seat and
includes an eccentric portion or cam, and wherein said seat
includes a first seat region adapted to receive said eccentric
portion in a first position of the pivot element, and a second seat
region adapted to receive said eccentric portion in a second
position of the pivot element, in which the first seat region is in
a position angularly offset around the axis of rotation and
linearly translated relative to the second seat region, such that
the second position of the pivot element is angularly offset around
the axis of rotation and linearly translated with respect to the
first position of the pivot element, and vice versa.
2. The movement device according to claim 1, wherein the eccentric
portion is configured to cooperate with the seat of rotation
causing a displacement of the pivot element from the first position
to the second position, upon an angular displacement of the first
element with respect to the second element about the axis of
rotation.
3. The movement device according to claim 1, further comprising a
base body fixed to the second element of the helmet, wherein the
base body has a recess delimited by a side edge or wall, said
recess defining said seat for the pivot and acting as a counter-cam
for said eccentric portion.
4. The movement device according to claim 3, wherein the side edge
or wall is shaped to define said first seat region and said second
seat region.
5. The movement device according to claim 4, wherein the side edge
or wall has a respective concave profile for defining said first
seat region and a convex profile for defining said second seat
region.
6. The movement device according to claim 1, wherein the pivot
element comprises an eccentric appendage received in the seat for
the pivot element and adapted to be placed in further regions of
the seat of rotation, and wherein the eccentric appendage is
configured to cooperate with the seat of rotation, causing a
displacement of the pivot element from the second position to the
first position upon an angular displacement of the first element
with respect to the second element about the axis of rotation.
7. The movement device according to claim 6, wherein the seat
further comprises a third seat region intended to receive the
eccentric appendage, when an eccentric portion is located in the
second seat region, and a fourth seat region intended to receive
the eccentric appendage, when the eccentric portion is located in
the first seat region.
8. The movement device according to claim 3, wherein the side edge
defining the seat defines a first shoulder in a third seat region,
with an end-of-travel function for the eccentric portion, and a
second shoulder in a fourth seat region, with an end-of-travel
function.
9. The movement device according to claim 1, further comprising a
retainer assembly for retaining the pivot element in the first
position and/or in the second position, said retainer assembly
including an interaction element associated with the pivot element
and at least one interaction counter-element associated with the
seat for the pivot.
10. The movement device according to claim 9, wherein at least one
of the interaction element and the at least one interaction
counter-element is an elastically deformable element.
11. The movement device according to claim 9, wherein the
interaction element is a tooth and the at least one interaction
counter-element comprises a spring, wherein the tooth is adapted to
deform a profile of the spring counteracting an elastic force of
the spring upon passage of said pivot element between the first
position and the second position and vice versa, and wherein, when
the pivot element is in the first position or in the second
position, the spring is in an original rest position and retains
the tooth of the pivot element.
12. A helmet including the movement device according to claim
1.
13. The helmet according to claim 12, including a visor and/or a
chin guard, wherein the visor or the chin guard is said first
element of the helmet.
14. The helmet according to claim 12, including a movable flap
adapted to close a ventilation opening, wherein said movable flap
is said first element of the helmet.
15. A method for moving a first element of a helmet with respect to
a second element of the helmet, said method comprising the steps
of: associating a pivot element with the first element, wherein
said pivot element includes an eccentric portion eccentric with
respect to a rotational axis of the pivot element; associating a
seat of rotation for the pivot element with the second element,
wherein said seat for the pivot element includes a first seat
region adapted to receive said eccentric portion and a second seat
region adapted to receive said eccentric portion, and wherein said
second seat region is linearly translated and angularly offset
around a rotational axis with respect to the first seat region;
positioning the pivot element at least partially in the seat in a
first position where the eccentric portion is located in the first
seat region; and moving the pivot element in a second position
where the eccentric portion is located in the second seat region,
wherein, when the eccentric portion of the pivot element passes
from the first seat region to the second seat region or vice versa,
the pivot element performs both a rotation to compensate for
angular offsetting between the second seat region and the first
seat region and a linear displacement to compensate for linear
offsetting between the second seat region and the first seat
region.
16. The method according to claim 15, wherein the linear
displacement is a forward or backward movement of the first element
of the helmet with respect to the second element of the helmet, for
spacing apart or moving the first element of the helmet
respectively away from or towards the second element of the
helmet.
17. The method according to claim 15, wherein: the first element of
the helmet is a visor, a chin guard or a movable flap of the
helmet, when the eccentric portion is located in the first seat
region, the first position corresponds to an open condition of the
visor, the chin guard or the movable flap and, when the eccentric
portion is located in the second seat region, the second position
corresponds to a closed condition of the visor, the chin guard or
the movable flap.
18. The method according to claim 15, wherein the eccentric portion
moves between said first seat region and said second seat region by
means of interaction with a side edge of the seat, said side edge
being shaped to define the first seat region and the second seat
region.
19. The method according to claim 15, wherein: the pivot element is
retained in said first position or in said second position by
interaction between an interaction element associated with the
pivot element and an interaction counter-element associated with
the pivot seat, and at least one of said interaction element and
said interaction counter-element is elastically deformable elements
such that when the pivot element passes from the first position to
the second position or vice versa, at least one of said interaction
element and said interaction counter-element is subject to an
elastic deformation.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application claims priority to Italian Patent
Application VR2012A000022 filed on Feb. 20, 2012.
FIELD
[0002] The present disclosure relates generally to a movement
device for a helmet. In particular, the present disclosure relates
to a movement device for a helmet for moving a first element of the
helmet with respect to a second element of the helmet. For example,
in a helmet including a visor and a shell, the movement device is
able to move the visor with respect to the shell of the helmet
between a first operating position, for example active and closed
position in front of the user's face, and a second operating
position, for example an inactive and open position, i.e. raised
opposite the user's forehead. Alternatively, for example, in a
helmet including a movable flap which closes an air intake or
ventilation opening in the helmet, the movement device is able to
move the movable element, with respect to a remaining portion of
the helmet, or is able to move similar elements or parts of the
helmet, such as a chin guard.
SUMMARY
[0003] According to a first aspect of the disclosure, a movement
device for a helmet for moving a first element of the helmet with
respect to a second element of the helmet is provided, wherein said
movement device includes a pivot element for pivoting the first
element of the helmet with respect to the second element of the
helmet about an axis of rotation, and a seat of rotation for the
pivot element, the pivot element being located at least partially
in the seat, wherein said pivot element includes an eccentric
portion or cam, and said seat includes a first seat region adapted
to receive said eccentric portion in a first position of the pivot
element, and a second seat region adapted to receive said eccentric
portion in a second position of the pivot element, in which the
first seat region is in a position angularly offset around the axis
of rotation and linearly translated relative to the second seat
region, such that the second position of the pivot element is
angularly offset around the axis of rotation and linearly
translated with respect to the first position of the pivot element,
and vice versa.
[0004] According to a second aspect of the disclosure, a method for
moving a first element of a helmet with respect to a second element
of the helmet is provided, wherein said method comprises the steps
of associating a pivot element of the first element, wherein said
pivot element includes an eccentric portion eccentric with respect
to a rotational axis of the pivot; associating a seat of rotation
of the pivot with the second element, wherein said seat for the
pivot includes a first seat region adapted to receive said
eccentric portion and a second seat region adapted to receive said
eccentric portion, and wherein said second seat region is linearly
translated and angularly offset around the axis of rotation with
respect to the first seat region; positioning the pivot element at
least partially in the seat in a first position where the eccentric
portion is located in the first seat region; moving the pivot
element in a second position where the eccentric portion is located
in the second seat region; wherein, when the eccentric portion of
the pivot element passes from the first seat region to the second
seat region or vice versa, the pivot element performs both a
rotation to compensate for angular offsetting between the second
seat region and the first seat region and a linear displacement to
compensate for linear offsetting between the second seat region and
the first seat region.
[0005] The aforementioned movement device can therefore be applied
to all protective helmets where there is a movement of parts.
[0006] In particular, with specific reference to a helmet with
visor, it is known to perform a rotary/translational movement of
the visor, namely to cause a translational movement of the visor
forwards with respect to the shell, upon initial opening of the
visor from the closed position, and, after the translational
movement, cause a rotational movement so as to move the visor into
the open position on the user's forehead. As a result of this
rotary/translational movement it is possible to obtain a helmet in
which the visor, the chin guard or the aforementioned movable flap
is located flush with the shell or a corresponding portion of the
helmet when in the closed position, or to open the visor, the chin
guard or the movable flap into the open position without
interfering with the volume of the shell during the opening
movement.
[0007] The known movement devices, although advantageous from many
points of view, are very complex to produce and are formed by
numerous mechanisms and components, such that the helmet is very
costly in manufacturing terms.
[0008] A technical problem forming the basis of the present
disclosure is that of providing a movement device for a helmet
which has a simplified structure and a small number of components
and/or which is able to achieve further advantages. A technical
problem forming the basis of the present disclosure is also that of
providing a helmet including such a device.
[0009] The technical problem is solved by providing a movement
device for a helmet as defined in the first aspect of the
disclosure and a method as defined in the second aspect of the
disclosure.
[0010] In particular, according to the present disclosure, the seat
of rotation for the pivot has a first seat region adapted to
receive an eccentric portion of the pivot element and a second seat
region, separate from the first seat region and adapted to receive
the eccentric portion of the pivot element, wherein the first seat
region is in a position angularly offset around the axis of
rotation of the pivot element and linearly translated relative to
said second seat region, and wherein a first position of the pivot
element corresponds to the first seat region and a second position
of the pivot element corresponds to said second seat region, such
that said second position of the pivot element is a position
rotated and linearly translated with respect to said first
position, and vice versa.
[0011] In other words, according to the present disclosure, the
seat for the pivot element has two different seat regions which are
in a mutual spatial relationship, with predefined angular
offsetting and linear offsetting, such that a movement of the
eccentric portion of the pivot element between the first seat
region and the second seat region, and vice versa, produces a
rotary/translational movement of the pivot element and therefore of
the first element of the helmet connected to the pivot element.
[0012] The first element of the helmet connected to the pivot
element may be the visor of the helmet, or any other movable
element, such as a flap suitable for closing a ventilation opening,
or a chin guard. The second element of the helmet may be the shell,
or for example the chin guard, if the movable flap closes a
ventilation opening of the chin guard.
[0013] In this way, when it is required to open the visor, the
movable flap or the chin guard (first element), and a user starts
to perform rotation of the first element, this produces a
displacement of the eccentric portion of the pivot element, owing,
for example, to the interaction between the cam element and the
pivot seat, for example from the second position into the first
position. This displacement includes both a rotation of the
eccentric portion and therefore the rotation of the movable
element, and also a linear displacement of the eccentric portion
and therefore a linear displacement of the movable element, in
order to compensate for the angular and linear offsetting of the
first seat region with respect to the second seat region.
[0014] Said angular and linear offsetting of the first seat region
with respect to the second seat region is designed so as to
correspond, for example in the case of a visor, to a forward
movement outwards of the first element (visor, chin guard or
movable flap) away from the second element (for example shell),
during opening, and a backward movement towards the second element
during closing.
[0015] It follows that, when a user performs movement of the first
element, for example a rotation of the visor, the chin guard or the
movable flap, this produces an immediate translational movement,
almost as a consequence of rotation. Basically, the rotation of the
pivot in the pivot seat is able to produce a translation thereof
between the two seat regions, such that the pivot performs overall
a rotary/translational movement.
[0016] In other words, in order to perform a rotary/translational
movement of a visor or other first element of the helmet, a pivot
element is associated with the first element of the helmet and a
pivot seat is associated with the second element of the helmet.
With this embodiment it is possible to obtain a movement device
which is very simple in that it may be obtained by means of
suitable designing of the seat regions of the pivot seat and the
respective angular offsetting and linear offsetting, as well as a
corresponding design of the pivot element and the eccentric portion
of the pivot element.
[0017] Moreover, in this solution it is possible to obtain a direct
correlation between angular offsetting and linear offsetting of the
seat regions of the pivot seat and the angular displacement and
linear displacement of the pivot element. Complicated mechanisms
are therefore avoided.
[0018] According to a first aspect of the present disclosure, the
pivot seat acts as a counter-cam and allows the relative angular
and linear movement of the pivot element in the pivot seat. A
rotation of the pivot element is coordinated with a translation
owing to a cam/counter-cam interaction between the pivot element
and the pivot seat. This means that, at least between the eccentric
portion of the pivot element and the respective seat regions of the
pivot seat, there is a temporary interaction between parts, for
example contact, such that between the two elements a thrust is
created such as to cause displacement of the first element with
respect to the second element.
[0019] In one embodiment, the seat of rotation has a recessed
configuration which is formed in a base body integrally associated
with second element of the helmet.
[0020] In other words, the movement device comprises a base body,
for example a plate-like body, having, formed in one face thereof,
a recess which acts as seat of rotation for the pivot element.
[0021] In some embodiments, the recess of the base body defines in
the base body a side wall or edge. The side wall is suitably shaped
so as to define the two seat regions which correspond to the two
positions of the pivot element and the respective second
element.
[0022] For example, in order to favour the movement of the
eccentric portion between the first seat region and the second seat
region, the side wall or edge defining said pivot seat is a curved
shaped edge.
[0023] Even more particularly, the first seat region corresponds to
a respective concave profile of the side edge, and said second seat
region corresponds to a respective convex profile of the side edge.
In other words, between the first seat region and the second seat
region, the side edge of the recess has a substantially
concave/convex progression. It follows that, in order to obtain the
linear displacement of the eccentric portion, a variation in the
concavity/convexity of the side edge of the recess is used.
[0024] Moreover, in some embodiments, in order to be able to
control a movement of the pivot element between the first position
and the second position, the pivot element comprises an eccentric
appendage intended to be received in a third seat region with an
end-of-travel function, when the eccentric portion is located in
the second seat region, and in a fourth seat region also with an
end-of-travel function, when the eccentric portion is located in
the first seat region. This third seat region and fourth seat
region may also be obtained by means of suitable shaping of the
side edge of the recess defining the pivot seat, where this
eccentric appendage interacts with the side edge of the recess.
[0025] In some embodiments, the movement device includes a retainer
assembly for retaining the pivot element in the first position or
in the second position, in order to prevent undesirable movement of
the pivot element from the position in which it is located; this is
useful for ensuring that the movement of the pivot element between
the first position and the second position may not occur
spontaneously, but only under the control of the user. The retainer
assembly includes, in some embodiments, an interaction element
associated with the pivot element, such as a tooth, and at least
one interaction counter-element, associated with the pivot seat.
Either one of and/or both the interaction element and interaction
counter-element may be an elastically deformable element, the
flexibility or elasticity of which is calibrated to allow the pivot
element to be retained under normal conditions without any forcing
(namely when the first element of the helmet is immobile with
respect to the second element of the helmet in the open and/or
closed condition) and the pivot element to be moved, by means of
application of a light force or pressure between the interaction
element and the interaction counter-element, when the first element
of the helmet must be opened/closed with respect to the second
element of the helmet.
[0026] Further advantages, characteristic features and the modes of
use of the movement device, helmet and method according to the
present disclosure will become clear from the following detailed
description of a number of preferred embodiments, provided by way
of a non-limiting example.
[0027] It is clear, however, that each embodiment of the subject
according to the present disclosure may have one or more of the
advantages listed above; in any case it is not required that each
embodiment should have simultaneously all the advantages
listed.
BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Reference shall be made to the figures in the accompanying
drawings in which:
[0029] FIG. 1 shows a partially cross-sectioned side view of a
helmet including a movement device according to an embodiment of
the present disclosure;
[0030] FIG. 2 shows a view, on a larger scale, from a first side,
of a movement device according to an embodiment of the present
disclosure in a first operating condition;
[0031] FIG. 3 shows a view, on a larger scale, from a first side,
of a movement device according to an embodiment of the present
disclosure in a second operating condition;
[0032] FIGS. 4-6 show schematic views, from a first side, of a
movement device according to an embodiment of the present
disclosure in successive operating conditions;
[0033] FIG. 7 shows a partial view, on a larger scale, from a first
side, of a movement device according to an embodiment of the
present disclosure;
[0034] FIG. 8 shows a view, on a larger scale, from a second side,
of a movement device according to an embodiment of the present
disclosure in an operating condition;
[0035] FIG. 9 shows a further view, on a larger scale, from a
second side, of a movement device according to an embodiment of the
present disclosure in an operating condition;
[0036] FIG. 10 shows an axonometric view of a helmet including a
movement device according to an embodiment of the present
disclosure associated with a ventilation opening.
DETAILED DESCRIPTION
[0037] With reference to the accompanying figures, the reference
number 10 denotes a movement device according to the present
disclosure.
[0038] In particular, in the example shown in the figures, the
movement device 10 is applied to a helmet 12 including a shell 14
protecting the head of a user and a visor 16. The movement device
10 is intended to move the visor 16 with respect to the shell 14 of
the helmet 12 by means of a rotational or pivoting movement about
an axis X.
[0039] More particularly, two movement devices 10, only one of
which is visible in FIGS. 1-9, are associated with the helmet 12,
said devices being arranged on opposite sides in so-called temple
regions of a user's head, namely along the sides of the helmet 12
which protect the temple zones of the user's head. The axis X
extends between one temple region and another and is the same for
both the movement devices 10.
[0040] In order to simplify illustration, in the continuation of
the present description, only a single movement device 10 is
described, namely the device located in the right-hand zone of the
shell 14, or in other words the movement device 10 located in the
user's right-hand temple region. In FIGS. 1-7 the movement device
10 is viewed from the inner side of the helmet 12, namely the side
for connection to the shell 14, while in FIGS. 8-9, the movement
device 10 is viewed from the opposite side, namely from the side
for connection to the visor 16 on the outer side of the helmet
12.
[0041] Each movement device 10 is intended to displace the visor 16
between a first operating position, or closed position, where said
visor 16 is situated opposite the user's face and has a protective
function, and a second operating position, where the visor 16 is
raised opposite the user's forehead.
[0042] It should be understood that the movement device 10 may be
associated with any other element of the helmet, such as a chin
guard or a movable flap intended to close a ventilation opening.
For example FIG. 10 shows a helmet including a movable flap 116
intended to close a ventilation opening 115. The movement device
10, which is located underneath the flap 116 and therefore is not
visible, is intended to move the movable flap 116 between an open
position and a closed position, in the same way as for the visor
16.
[0043] In the continuation of the description, reference will be
made in particular to the use of the movement device 10 for moving
the visor 16 (which represents said first element of the helmet)
with respect to the shell 14 (which represents said second element
of the helmet) only for the sake of simplifying illustration.
[0044] In the example shown, the movement device 10 comprises a
base body 20, or support base, integrally associated with the shell
14 of the helmet, for example by means of screws 21, and arranged
inside on the shell 14, and a pivot element 24 which is movable
with respect to the base body 20.
[0045] In particular, the pivot element 24 includes a first head
portion 22 with a slender and oblong form, which is housed in a
pivot seat 25 formed in the base body 20. In particular, the pivot
seat 25 is a recess formed in the base body 20 on one side or face
of the base body.
[0046] In some embodiments, the pivot element 24 and the base body
20 are made of metallic materials in order to ensure adequate
robustness.
[0047] In other embodiments, the pivot element 24 and the base body
20 are made, for example, of acetal resin, polycarbonate, ABS or
similar materials which have a suitable mechanical strength.
[0048] The pivot element 24 is stably associated with the visor 16
and is rotationally integral therewith. The connection between the
pivot element 24 and the visor 16 is obtained in a known
manner.
[0049] For connection to the visor 16 the pivot element 24
comprises a second head portion 23, opposite to the first head
portion 22, in the example having a substantially rectangular form
(see FIGS. 8-9).
[0050] As can be seen in the drawings, the pivot element 24
includes a rotating shaft, denoted generally by the number 27,
coaxial with the axis of rotation X of the visor 16, and an
eccentric portion or cam 26 which is eccentric with respect to the
axis X and associated with the first head portion 22.
[0051] With reference to FIGS. 2 and 3, according to an aspect of
the present disclosure, the pivot seat 25 acts as a counter-cam for
the eccentric portion 26 and includes a first seat region 30
adapted to receive said eccentric portion 26 and a second seat
region 32 adapted to receive said eccentric portion 26, wherein the
first seat region 30 is in a position angularly offset and linearly
translated with respect to said second seat region 32. The angular
offsetting of the first seat region 30 with respect to the second
seat region 32 is denoted by ".alpha." in FIG. 3 and occurs around
the axis of rotation X.
[0052] The linear or transverse offsetting of the first seat region
30 with respect to the second seat region 32, which in the example
shown occurs substantially in a horizontal plane, is denoted by "d"
in FIG. 3.
[0053] Depending on said spatial relationship between the first
seat region 30 and the second seat region 32, a first position of
the pivot element 24 corresponds to the first seat region 30, and a
second position of the pivot element 24 corresponds to said second
seat region 32, such that said second position is a position
rotated and translated with respect to said first position.
[0054] Even more particularly, in the example shown, the first
position of the pivot element 24, when the eccentric portion 26 is
located in the first seat region 30, is designed so as to
correspond to a position which is further forwards and angularly
higher than the second position of the pivot element 24, when the
eccentric portion 26 is in the second seat region 32.
[0055] It follows that, in the example shown, an open condition of
the visor 16 on the forehead (linearly advanced position)
corresponds to the first position of the pivot element 24, when the
eccentric portion 26 is located in the first seat region 30. A
closed condition of the visor 16 (linearly retracted position flush
with the shell 14) corresponds to the second position, when the
eccentric portion 26 is located in the second seat region 32.
[0056] The correlation between the open position and the closed
position of the visor 16 and the positions of the eccentric portion
26 of the pivot element 24 in the seat 25 is visible in FIGS.
4-6.
[0057] Even more particularly, in order to open or close the visor
16, a user acts in the manner described below.
[0058] Initially, the visor 16 is located, for example, in the open
position on the forehead. Therefore, the eccentric portion 26 is
located in the first seat region 30.
[0059] When the visor 16 is lowered, the eccentric portion 26
passes from the first seat region 30 to the second seat region 32,
and the pivot element 24 performs a rotation to compensate for
angular offsetting between the two seat regions 30, 32, and a
backwards translation to compensate for linear offsetting between
the two seat regions 30, 32.
[0060] Consequently the visor 16 is retracted towards the shell and
in the closed position is located flush with the shell 14.
[0061] Vice versa, in order to open the visor 16, the eccentric
portion 26 passes from the second seat region 32 to the first seat
region 30, and the pivot element 24 performs not only a rotation,
but also a forwards translation so that the visor moves outwards
beyond the volume of the shell 14.
[0062] With reference to FIGS. 2 and 3, it can also be seen that
the pivot seat 25 is substantially a recess formed in the base body
20, on one face of the base body 20.
[0063] The recess defines a side wall or edge 35 in the base body
20.
[0064] The side edge 35 is suitably shaped to define the first seat
region 30 and the second seat region 32, namely the first seat
region 30 and the second seat region 32 are defined by shaping of
the side edge 35 of the base body 20.
[0065] The profile of the side edge 35 is substantially
concave/convex, with a flexion, i.e. has a depression/hump, between
the first seat region 30 and the second seat region 32.
[0066] In particular, the side edge 35 has a profile which is
concave, namely defines a depression or groove, in the first seat
region 30, and a profile which is slightly convex, namely defines a
slight projection or hump, in the second seat region 32.
[0067] Owing to this concave/convex shape of the side edge 35 of
the base body 20 it is possible to obtain a homogeneous and
continuous rotary/translational movement of the pivot element
24.
[0068] With reference to FIGS. 2 and 3, it can also be noted,
moreover, that the first head portion 22 of the pivot element 24
comprises, in addition to the eccentric portion 26, an eccentric
projecting appendage 36 which is arranged on the substantially
opposite side of the axis X to the eccentric portion 36 and
interacts with further seat regions of the seat 25.
[0069] This appendage 36 has the function of interacting with the
side edge 35 of the base body 20 both to guide displacement of the
pivot element 34 from the second (retracted) position to the first
(advanced) position and to define a so-called end-of-travel stop
for the movement of the pivot element 24 into the two positions. In
particular, the seat 25 comprises on the substantially opposite
side of the axis of rotation X, a third seat region 40 intended to
receive the eccentric appendage 36, when the eccentric portion 26
is located in the second seat region 32, and a fourth seat region
42 intended to receive the eccentric appendage 36, when the
eccentric portion 26 is located in the first seat region 30.
[0070] The third seat region 40 and the fourth seat region 42 are
also defined by a concave shaping of the edge 35. In fact the edge
35 has respective concave depressions with the formation of
shoulders 45, 46 in the third seat region 40 and fourth seat region
42, said shoulders 45, 46 acting as end-of-travel stops. Moreover,
the edge 35 situated between the third seat region 40 and the
fourth seat region 42 is shaped so as to obtain a linear
displacement of the pivot element 42 when it is moved from the
second (retracted) position to the first (advanced) position.
[0071] With reference to FIGS. 7-9, it can also be seen that the
movement device 10 includes a retainer assembly 50 for retaining
the pivot element 24 in the first position or in the second
position, preventing undesirable movement of the pivot element 24
from the respective first position or second position. For this
purpose, the base body 20 comprises, on the side/face opposite to
the pivot seat 25, a cavity 51 which houses a spring 52, in the
example an undulating linear spring.
[0072] Basically, the base body 20 has on a first side or face the
pivot seat 25 and, on the other side or face, the cavity 51 for the
retainer assembly 50 and, in particular, in the example shown, for
the linear undulating spring 52.
[0073] The spring 52 is defined by a suitable profile and, in the
embodiment shown, comprises in particular three undulations,
defining two corresponding lateral humps 53, 55 and a corresponding
central hump 54 and respective intermediate depressions and is
positioned in the cavity 51 so as to be able to be flexed in a
direction at right angles to the direction of the axis of rotation
X of the pivot element 24.
[0074] The spring 52 is able to interact with an interaction
element which is associated with the pivot element and in the
example of embodiment is a tooth 56 having, in the example, a
rounded profile.
[0075] The tooth 56 and the linear undulating spring 52 are
relatively arranged and designed so that, when the eccentric
portion 26 is located in the first seat region 30, the tooth 56 is
stably housed in one of the two depressions between two humps, for
example between the two humps 53, 54 of the spring 52, and, when
the eccentric portion 26 is located in the second seat region 32,
the tooth 56 is stably housed in the other depression between the
other two humps, for example between the two humps 54, 55 of the
spring 52.
[0076] Basically, the tooth 56 acts as an interaction element and
the spring as an interaction counter-element. The profile of the
spring 56 thus allows the interaction element to be retained under
normal conditions without forcing (namely when the visor 16 of the
helmet is immobile with respect to the shell 14 in the open and/or
closed condition) both in the first position and in the second
position and prevent undesirable movements of the visor 16. A
single spring 52 is thus used to keep the pivot element 24 fixed in
the two positions.
[0077] In fact, when it is required to perform an opening and/or
closing movement of the visor 16 of the helmet, and the pivot
element 24 is displaced between the first position and the second
position and vice versa, the tooth passes from one position to the
other, deforming the profile of the spring and counteracting the
elastic force of the latter. Once passed over, owing to the elastic
return movement of the spring 52, the latter is repositioned in the
original position, retaining again the tooth 56 of the pivot
element 24.
[0078] Owing to this elastic configuration of the retainer
assembly, a soft and dampened movement of the visor may be obtained
during the opening and closing operations.
[0079] The movement device of the present disclosure has been
described hitherto with reference to preferred embodiments thereof.
It is understood that other embodiments relating to the same
inventive idea may exist, all of these falling within the scope of
protection of the claims which are provided hereinbelow.
* * * * *