CA2053069A1 - Locking device for helmet visor - Google Patents
Locking device for helmet visorInfo
- Publication number
- CA2053069A1 CA2053069A1 CA 2053069 CA2053069A CA2053069A1 CA 2053069 A1 CA2053069 A1 CA 2053069A1 CA 2053069 CA2053069 CA 2053069 CA 2053069 A CA2053069 A CA 2053069A CA 2053069 A1 CA2053069 A1 CA 2053069A1
- Authority
- CA
- Canada
- Prior art keywords
- catch
- hook
- helmet
- visor
- assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000000475 sunscreen effect Effects 0.000 description 2
- 239000000516 sunscreening agent Substances 0.000 description 2
- 230000000703 anti-shock Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 210000003811 finger Anatomy 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 210000003813 thumb Anatomy 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A42—HEADWEAR
- A42B—HATS; HEAD COVERINGS
- A42B3/00—Helmets; Helmet covers ; Other protective head coverings
- A42B3/04—Parts, details or accessories of helmets
- A42B3/18—Face protection devices
- A42B3/22—Visors
- A42B3/221—Attaching visors to helmet shells, e.g. on motorcycle helmets
- A42B3/222—Attaching visors to helmet shells, e.g. on motorcycle helmets in an articulated manner, e.g. hinge devices
- A42B3/223—Attaching visors to helmet shells, e.g. on motorcycle helmets in an articulated manner, e.g. hinge devices with means for locking the visor in a fully open, intermediate or closed position
Landscapes
- Helmets And Other Head Coverings (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
Locking device for helmet visor The invention concerns helmets equipped with a visor, in which a locking device holds the visor in a given position, generally the lowered position.
To ensure locking of the visor a catch and its spring are incorporated into the visor control knob while a hook is mounted on the shell of the helmet; the catch engages in the hook when the visor is in the lowered position. A
release button enables the catch to be disengaged by making it pivot about its axis.
Locking device for helmet visor The invention concerns helmets equipped with a visor, in which a locking device holds the visor in a given position, generally the lowered position.
To ensure locking of the visor a catch and its spring are incorporated into the visor control knob while a hook is mounted on the shell of the helmet; the catch engages in the hook when the visor is in the lowered position. A
release button enables the catch to be disengaged by making it pivot about its axis.
Description
~0~3~
Locking device for helmet visor BACKGROUND OF THE INVENTION
The present invention concerns a locking device enabling a helmet visor to be held in a given position.
Helmets comprising at least one visor lock are used in particular, although not exclusively, by aircraft and helicopter pilots.
Por example the helmet bearing the reference OS 458, manufactured by the Optique Scientifique Gueneau company, comprises two retractable visors, one transparent and the other forming a sunscreen The transparent visor is intended, in particular, to protect the pilot in the event of a shock inside the cockpit and to protect him from the blast in the event of ejection or canopy damage; for this reason the transparent visor must remain lowered for the whole duration of the flight. On the OS 458 helmet the two visors are maneuvered ~; using two mechanisms, one on the left-hand side of the helmet, the other on the right-hand side. The transparent visor, controlled by the right-hand mechanism, is held in the lowered position by a locking device comprising a spiral spring; this locking proves insufficient in the '~ case of ejection at high speed.
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SUMMARY OF THE INVENTION
The present invention eliminates this disadvantage, while enabling the locking device according to the 25 invention to be mounted on equipment initially equipped with~a locking device according to the prior art.
The locking device described uses a safety catch providing positive locking. ~
The present invention provides for a helmet locking 30 device to lock a first mechanical assembly comprising a v1sor, with respect to a second mechanical assembly , ~
, .
.
., - . . .
:
: . ' . : ' 2~3~
comprising a helmet shell, the first assembly being rotatably mounted about a main axis for rotating with respect to the second assembly in such a way that it can be moved between two extreme angular positions, the device comprising a secondary axis approximately parallel to the main axis, a safety catch pivoting around the secondary axis, a spring to hold the safety catch, and a hook to engage the catch when the first assembly is in a predetermined one of the two extreme positions, the spring acting on the catch to hold it in the hook, and in which the catch with the spring forms part of one of the two assemblies, and the hook forms part of the other one.
BRIEF DESCRIPTION OF THE DRAWING
The invention will be better understood and other characteristics will appear on reading the description given below with reference to the appended drawings of which:
- Figure 1 represents a helmet according to the prior art, - Figure 2 represents a partial view of a helmet according to the invention.
On the different figures, corresponding parts are 2S designated by the same references.
MORE DETAI~ED DESCRIPTION
Figure 1 represents the anti-shock helmet made by Optique Scientifique Gueneau under the reference OS 458 and intended in particular for aircraft pilots. This helmet comprises a helmet shell 1, and two visors one of which is a sunscreen and the other, 2, a transparent screen; the two visors are controlled by mechanisms situated respectively on the left-hand side and on the right-hand side of the shell. In Figure 1 only the transparent visor, 2, is shown; its two extreme positions when it is lowered and raised, 2a and 2b respectively, are indicated.
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The visor 2 turns about a mechanical axis, A, fixed to the shell and is attached to an operating lever 5. A
spiral spring 6, one end of which is fixed to the axis A, acts on the lever 5 to push and hold the visor 2 to its 5 lowered position.
A formed plate 3, fixed to the shell 1 by five screws such as 31, protects the lever 5 and its spiral spring which are enclosed between the external wall of the shell and the plate. A cutaway X, in the plate 3, reveals the 10 lever S and the spring 6. The plate has an arc-shaped hole 30 in which lies the mechanical axis B fixed to the lever 5 and parallel to the axis A. An operating knob 40, fixed to the axis B, enables manual raising or lowering of the visor 2. The visor 2 is maintained in raised position 15 by an automatic locking not shown on the diagram.
The force exerted by the spiral spring 6 may be insufficient, under certain conditions of use, to hold the visor 2 in lowered position. This is why the helmet according to Figure 1 has been modified, as indicated in 20 Figure 2.
Figure 2 shows how, by modification of the original operating knob 40 and by addition of a hook 10, the visor is held positively in the lowered position.
The hook 10 is fixed to the helmet by at least two of 25 the screws holding the plate 3 to the shell 1.
The original knob 40 is replaced by a knob 4 which is shown partially cut away; the edges Y of this cutaway have been hatched in Figure 2.
The body 41 of the knob 4 is considerably larger than the original knob 40 so that it can accommodate a mechanical assembly which can be seen through the cutaway and which, together with the hook 10, constitutes a lock preventing the visor 2 from raising accidentally.
The body 41 of the knob 4 is mounted, in the same way 35 as the knob 40 in Figure 1, on the axis B which can move along the arc-shaped slot.
;~ The mechanical assembly contained in the body of the ~ ~ ~ knob comprises:
: :
.
, :
.:
2~3~
- a catch 7, pivoting about a mechanical axis C, fi~ed to the body ~1 of the knob 4 and parallel to the axes A and B; this catch engages in the hook 10 when the visor is lowered, - a coil spring 8, one end of which is fixed to the body of the knob and the other end of which exerts pressure on the catch 7 holding it engaged in the hook 10, - and a release button 9 formed of a head external to the body 41 of the knob 4 and attached to a pin which slides within the body of the knob.
In addition, an elastic stop 11 intended to absorb play is fixed to the body of the knob in a position where it comes into contact with the hook lO when it engages the catch 7. The visor 2 is lowered by exerting pressure with the thumb of the right hand, as indicated in Figure 2, on the rear part of the body of the knob; at the end of travel the catch locks in automatically.
The visor 2 is raised simply by pressing with the index finger of the right hand, as indicated in Figure 2, on the head of the release button 9; this action brings the pin of the release button 9 into contact with the catch 7 which then pivots about the axis C and disengages the hook 10.
It should be noted that the position of the axis C is such that the force on the visor, exposed to a blast, is not transmitted to the spring 8.
The present invention is not limited to the example described. For instance, the mechanical assembly contained in the body of the knob 4 in Figure 2 may be modified by making the stop 11 adjustable by a screw system in order to adapt the visor position to the shape of the pilot's face.
To do this the stop 11 is attached to the head of a screw and the hook 10 comprises two parts: the screw attached to the stop and a fixed part which is connected to the shell 1 in the same way as the hook 10 in Figure 2, and into which the stop screw is screwed to a greater or lesser depth. It is then the head of this screw which constitutes the hook.
,: ' ~ It should be noted that, with respect to the assembly shown :,1 ~ .i . .:
~`~''`'`''' '''' ~
,' ~ ': -: ` `~:
, :
:: :
2~3~fi9 in Figure 2, this hook and therefore the hook of the catch 7 must be slightly shifted downwards because of the presence of one of the two screws which flx the hook 10 to the shelL l.
In the same way, although the above description concerns a specific helmet, designed for aircraft and helicopter pilots, the invention is applicable to any helmet equipped with a visor and in particular to helmets for motorcyclists, car drivers and people practising 10 hazardous sports.
Very generally speaking, the invention concerns any device for locking a visor in an extreme position, i.e. in raised or lowered position, which comprises a mobile catch and a fixed hook; and, inversely to what is described with reference to Figure 2, the catch may have its mechanical axis fixed to the shell of the helmet while the hook may pivot with the visor.
"
~. ~
~: :
~ '.
' , :~
: , :, . ~
~: .
Locking device for helmet visor BACKGROUND OF THE INVENTION
The present invention concerns a locking device enabling a helmet visor to be held in a given position.
Helmets comprising at least one visor lock are used in particular, although not exclusively, by aircraft and helicopter pilots.
Por example the helmet bearing the reference OS 458, manufactured by the Optique Scientifique Gueneau company, comprises two retractable visors, one transparent and the other forming a sunscreen The transparent visor is intended, in particular, to protect the pilot in the event of a shock inside the cockpit and to protect him from the blast in the event of ejection or canopy damage; for this reason the transparent visor must remain lowered for the whole duration of the flight. On the OS 458 helmet the two visors are maneuvered ~; using two mechanisms, one on the left-hand side of the helmet, the other on the right-hand side. The transparent visor, controlled by the right-hand mechanism, is held in the lowered position by a locking device comprising a spiral spring; this locking proves insufficient in the '~ case of ejection at high speed.
:`
.~
SUMMARY OF THE INVENTION
The present invention eliminates this disadvantage, while enabling the locking device according to the 25 invention to be mounted on equipment initially equipped with~a locking device according to the prior art.
The locking device described uses a safety catch providing positive locking. ~
The present invention provides for a helmet locking 30 device to lock a first mechanical assembly comprising a v1sor, with respect to a second mechanical assembly , ~
, .
.
., - . . .
:
: . ' . : ' 2~3~
comprising a helmet shell, the first assembly being rotatably mounted about a main axis for rotating with respect to the second assembly in such a way that it can be moved between two extreme angular positions, the device comprising a secondary axis approximately parallel to the main axis, a safety catch pivoting around the secondary axis, a spring to hold the safety catch, and a hook to engage the catch when the first assembly is in a predetermined one of the two extreme positions, the spring acting on the catch to hold it in the hook, and in which the catch with the spring forms part of one of the two assemblies, and the hook forms part of the other one.
BRIEF DESCRIPTION OF THE DRAWING
The invention will be better understood and other characteristics will appear on reading the description given below with reference to the appended drawings of which:
- Figure 1 represents a helmet according to the prior art, - Figure 2 represents a partial view of a helmet according to the invention.
On the different figures, corresponding parts are 2S designated by the same references.
MORE DETAI~ED DESCRIPTION
Figure 1 represents the anti-shock helmet made by Optique Scientifique Gueneau under the reference OS 458 and intended in particular for aircraft pilots. This helmet comprises a helmet shell 1, and two visors one of which is a sunscreen and the other, 2, a transparent screen; the two visors are controlled by mechanisms situated respectively on the left-hand side and on the right-hand side of the shell. In Figure 1 only the transparent visor, 2, is shown; its two extreme positions when it is lowered and raised, 2a and 2b respectively, are indicated.
.
, ,~
.
: ~ ' ' ' ' -' ' ' ' ' 3 ~3~
The visor 2 turns about a mechanical axis, A, fixed to the shell and is attached to an operating lever 5. A
spiral spring 6, one end of which is fixed to the axis A, acts on the lever 5 to push and hold the visor 2 to its 5 lowered position.
A formed plate 3, fixed to the shell 1 by five screws such as 31, protects the lever 5 and its spiral spring which are enclosed between the external wall of the shell and the plate. A cutaway X, in the plate 3, reveals the 10 lever S and the spring 6. The plate has an arc-shaped hole 30 in which lies the mechanical axis B fixed to the lever 5 and parallel to the axis A. An operating knob 40, fixed to the axis B, enables manual raising or lowering of the visor 2. The visor 2 is maintained in raised position 15 by an automatic locking not shown on the diagram.
The force exerted by the spiral spring 6 may be insufficient, under certain conditions of use, to hold the visor 2 in lowered position. This is why the helmet according to Figure 1 has been modified, as indicated in 20 Figure 2.
Figure 2 shows how, by modification of the original operating knob 40 and by addition of a hook 10, the visor is held positively in the lowered position.
The hook 10 is fixed to the helmet by at least two of 25 the screws holding the plate 3 to the shell 1.
The original knob 40 is replaced by a knob 4 which is shown partially cut away; the edges Y of this cutaway have been hatched in Figure 2.
The body 41 of the knob 4 is considerably larger than the original knob 40 so that it can accommodate a mechanical assembly which can be seen through the cutaway and which, together with the hook 10, constitutes a lock preventing the visor 2 from raising accidentally.
The body 41 of the knob 4 is mounted, in the same way 35 as the knob 40 in Figure 1, on the axis B which can move along the arc-shaped slot.
;~ The mechanical assembly contained in the body of the ~ ~ ~ knob comprises:
: :
.
, :
.:
2~3~
- a catch 7, pivoting about a mechanical axis C, fi~ed to the body ~1 of the knob 4 and parallel to the axes A and B; this catch engages in the hook 10 when the visor is lowered, - a coil spring 8, one end of which is fixed to the body of the knob and the other end of which exerts pressure on the catch 7 holding it engaged in the hook 10, - and a release button 9 formed of a head external to the body 41 of the knob 4 and attached to a pin which slides within the body of the knob.
In addition, an elastic stop 11 intended to absorb play is fixed to the body of the knob in a position where it comes into contact with the hook lO when it engages the catch 7. The visor 2 is lowered by exerting pressure with the thumb of the right hand, as indicated in Figure 2, on the rear part of the body of the knob; at the end of travel the catch locks in automatically.
The visor 2 is raised simply by pressing with the index finger of the right hand, as indicated in Figure 2, on the head of the release button 9; this action brings the pin of the release button 9 into contact with the catch 7 which then pivots about the axis C and disengages the hook 10.
It should be noted that the position of the axis C is such that the force on the visor, exposed to a blast, is not transmitted to the spring 8.
The present invention is not limited to the example described. For instance, the mechanical assembly contained in the body of the knob 4 in Figure 2 may be modified by making the stop 11 adjustable by a screw system in order to adapt the visor position to the shape of the pilot's face.
To do this the stop 11 is attached to the head of a screw and the hook 10 comprises two parts: the screw attached to the stop and a fixed part which is connected to the shell 1 in the same way as the hook 10 in Figure 2, and into which the stop screw is screwed to a greater or lesser depth. It is then the head of this screw which constitutes the hook.
,: ' ~ It should be noted that, with respect to the assembly shown :,1 ~ .i . .:
~`~''`'`''' '''' ~
,' ~ ': -: ` `~:
, :
:: :
2~3~fi9 in Figure 2, this hook and therefore the hook of the catch 7 must be slightly shifted downwards because of the presence of one of the two screws which flx the hook 10 to the shelL l.
In the same way, although the above description concerns a specific helmet, designed for aircraft and helicopter pilots, the invention is applicable to any helmet equipped with a visor and in particular to helmets for motorcyclists, car drivers and people practising 10 hazardous sports.
Very generally speaking, the invention concerns any device for locking a visor in an extreme position, i.e. in raised or lowered position, which comprises a mobile catch and a fixed hook; and, inversely to what is described with reference to Figure 2, the catch may have its mechanical axis fixed to the shell of the helmet while the hook may pivot with the visor.
"
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: , :, . ~
~: .
Claims (4)
1. A helmet locking device to lock a first mechanical assembly comprising a visor, with respect to a second mechanical assembly comprising a helmet shell, the first assembly being rotatably mounted about a main axis for rotating with respect to the second assembly in such a way that it can be moved between two extreme angular positions, the device comprising a secondary axis approximately parallel to the main axis, a safety catch pivoting around the secondary axis, a spring to hold the safety catch, and a hook to engage the catch when the first assembly is in a predetermined one of the two extreme positions, the spring acting on the catch to hold it in the hook, and in which the catch with the spring forms part of one of the two assemblies, and the hook forms part of the other one.
2. A helmet locking device according to claim 1, wherein the first assembly includes a control knob used to move the first assembly around the main axis, and wherein the secondary axis and the hook are fixed, one of them to the shell, the other one of them to the knob.
3. A helmet locking device according to claim 1, adapted to a pilot's helmet manufactured under reference OS 458 and comprising the first and second assemblies, the second assembly comprising a plate fixed to the shell by five screws, wherein the hook is fixed to the shell by at least two of the five screws, and wherein the control knob intended to manoeuvre the visor in the helmet manufactured under reference OS 458 is replaced by a modified control knob in which the hook and the spring are mounted.
4. A helmet locking device according to claim 3, comprising a release button which, when it is pressed, acts on the catch and counteracts the action of the spring in order to release the catch when it is engaged, and wherein the release button is mounted in the modified control knob.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9012740 | 1990-10-16 | ||
| FR9012740A FR2667765A1 (en) | 1990-10-16 | 1990-10-16 | DEVICE FOR BLOCKING A VISOR AND HELMET EQUIPPED WITH AT LEAST ONE SUCH DEVICE. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2053069A1 true CA2053069A1 (en) | 1992-04-17 |
Family
ID=9401254
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2053069 Abandoned CA2053069A1 (en) | 1990-10-16 | 1991-10-09 | Locking device for helmet visor |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0481860A1 (en) |
| CA (1) | CA2053069A1 (en) |
| FR (1) | FR2667765A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9125447B2 (en) | 2010-09-20 | 2015-09-08 | Revision Military S.A.R.L. | Helmet attachment mechanism for visor |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2705871B1 (en) * | 1993-06-04 | 1995-07-21 | Sextant Avionique | Articulated fixing device for a visor on a helmet. |
| GB2303872B (en) * | 1995-08-01 | 1999-01-20 | Gec Marconi Avionics Holdings | Helmet visor release apparatus |
| DE69517189T2 (en) * | 1995-12-22 | 2001-01-25 | E.D.C. S.A., Issy Les Moulineaux | Device for locking the visor of a helmet for motorcyclists and the like |
| FR2742636B1 (en) * | 1995-12-26 | 1998-02-06 | Sextant Avionique | HELMET WITH NIGHT VISION DEVICE WITH OPTIMIZED SAFETY AND ERGONOMICS |
| CA2422025A1 (en) * | 2002-03-12 | 2003-09-12 | Bombardier Inc. | Helmet with breathing mask air passages |
| FR2878127A1 (en) * | 2004-11-22 | 2006-05-26 | 4Thirty6 Sarl | Helmet for use during e.g. skiing practicing, has inner and outer shells, return spring to force visor in utilization position, locking units to lock visor in raised removal position, and flange allowing disassembling and changing of visor |
| FR2952277B1 (en) * | 2009-11-10 | 2011-12-09 | Shark | SWIVEL SCREEN HELMET |
| US11583026B2 (en) | 2021-02-09 | 2023-02-21 | LIFT Airborne Technologies LLC | Automatic visor locking system |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1446416A (en) * | 1965-06-09 | 1966-07-22 | Optique Scient L | Aircraft pilot's helmet with maneuvering mechanism and protective screen locking |
| FR2391664A1 (en) * | 1977-05-24 | 1978-12-22 | Ph Diffusion | Safety helmet visor that can be raised - is designed to lock in lower position by foot connected to peak and fitting over stud |
| IT7721536U1 (en) * | 1977-06-13 | 1978-09-16 | Kiwi Sa | FULL FACE HELMET, WITH AUTOMATICALLY RAISING VISOR, PARTICULARLY USED BY MOTORCYCLISTS FOR BODY PROTECTION |
| IT7820447U1 (en) * | 1978-01-10 | 1979-07-10 | Landi Cesare | FULL-FACE HELMET, PARTICULARLY USED BY MOTORCYCLISTS AND SIMILAR RIDERS, WITH A DEVICE DESIGNED TO AUTOMATICALLY RAISE THE VISOR WITH THE USE OF ONE HAND. |
| US4170042A (en) * | 1978-02-06 | 1979-10-09 | Gentex Corporation | Readily releasable powered visor-and-lock assembly for helmet |
| US4292688A (en) * | 1978-07-11 | 1981-10-06 | Elliott Brothers (London) Limited | Latch mechanisms |
| GB8628864D0 (en) * | 1986-12-03 | 1987-01-28 | Helmets Ltd | Helmets |
-
1990
- 1990-10-16 FR FR9012740A patent/FR2667765A1/en active Pending
-
1991
- 1991-10-09 CA CA 2053069 patent/CA2053069A1/en not_active Abandoned
- 1991-10-11 EP EP91402726A patent/EP0481860A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9125447B2 (en) | 2010-09-20 | 2015-09-08 | Revision Military S.A.R.L. | Helmet attachment mechanism for visor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0481860A1 (en) | 1992-04-22 |
| FR2667765A1 (en) | 1992-04-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |