EP3943162B1 - Control assembly for a breathing mask for an aircraft crew member - Google Patents

Control assembly for a breathing mask for an aircraft crew member Download PDF

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Publication number
EP3943162B1
EP3943162B1 EP20305856.5A EP20305856A EP3943162B1 EP 3943162 B1 EP3943162 B1 EP 3943162B1 EP 20305856 A EP20305856 A EP 20305856A EP 3943162 B1 EP3943162 B1 EP 3943162B1
Authority
EP
European Patent Office
Prior art keywords
axial
selection button
mode selection
cover
control 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.)
Active
Application number
EP20305856.5A
Other languages
German (de)
French (fr)
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EP3943162A1 (en
Inventor
Jérémy Jacotey
Didier Lamourette.
Serge Moreira
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Safran Aerosystems SAS
Original Assignee
Safran Aerotechnics SAS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to EP20305856.5A priority Critical patent/EP3943162B1/en
Application filed by Safran Aerotechnics SAS filed Critical Safran Aerotechnics SAS
Priority to CN202180061145.0A priority patent/CN116133723A/en
Priority to PCT/EP2021/070450 priority patent/WO2022018169A1/en
Priority to US18/006,714 priority patent/US20230293916A1/en
Priority to BR112022026895A priority patent/BR112022026895A2/en
Priority to EP21749134.9A priority patent/EP4185391B1/en
Priority to CA3184015A priority patent/CA3184015A1/en
Publication of EP3943162A1 publication Critical patent/EP3943162A1/en
Application granted granted Critical
Publication of EP3943162B1 publication Critical patent/EP3943162B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B9/00—Component parts for respiratory or breathing apparatus
    • A62B9/02—Valves
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/14—Respiratory apparatus for high-altitude aircraft
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
    • A62B18/08—Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices
    • A62B18/10—Valves
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B7/00—Respiratory apparatus
    • A62B7/02—Respiratory apparatus with compressed oxygen or air

Definitions

  • the present disclosure relates to a regulation assembly for a respiratory mask for an aircraft crew member.
  • the first “EMER” position corresponds to “EMERGENCY” mode. It should be selected in the event of smoke or fire in the cockpit.
  • the second position “100%” corresponds to “100%” mode. It offers protection against hypoxia.
  • the third position “N” corresponds to “NORMAL” mode. It makes it possible to limit oxygen consumption in preventive wear or on a landing in descent profile.
  • the selection button defaults to the second position 100%.
  • the second 100% position is arranged in the center between the first position and the third position.
  • the mode selection button is not visible to the user when the mask is worn.
  • the selection button is asymmetrical to allow the user to distinguish the direction of rotation leading to “EMERGENCY” mode and “NORMAL” using touch.
  • the selection button also has side markings to allow verification of the selected mode by a third party.
  • current respiratory masks include means providing information on the selected operating mode to the user, thanks to the asymmetry of the button, and to third parties, using the side markings.
  • the purpose of this disclosure is to propose a regulation set capable of avoiding accidental selection of “NORMAL” mode instead of “EMERGENCY” mode.
  • the present disclosure aims to increase the level of safety of oxygen mask control assemblies by preventing mishandling of the mode selection button.
  • the invention relates to a regulator assembly as described above in which the mode selection button comprises a base pivotally mounted on the support relative to an axis of rotation, and a cover carried by the base; said axis of rotation being perpendicular to the support and extending in an axial direction; said cover being movable in the axial direction relative to the base between a locking position of the mode selection button and an unlocking position of the mode selection button, the locking position locking the rotation of the mode selection button from the second position to the third position, the unlocking position allowing rotation of the mode selection button from the second position to the third position.
  • the present disclosure makes it possible to mechanically prevent the selection of an incorrect operating mode.
  • the support comprises at least one axial projection
  • the cover comprises a bottom, and at least one axial wall carried by the bottom, said at least one axial wall being able to abut against said at least one projection axial when the cover is positioned in the locking position and the mode selection button is pivoted from the second position to the third position; said at least one axial wall being capable of pivoting away from said at least one axial projection when the cover is positioned in the unlocking position and the mode selection button is pivoted from the second position towards the third position.
  • the base comprises a plate extending parallel to the support; the bottom resting against the plate when the mode selection button is in the locking position; the base comprises a sliding device and the cover comprises a complementary sliding device cooperating with the sliding device to allow movement of the cover relative to the base in the axial direction between the locking position and the unlocking position.
  • the cover is capable of being pulled in a direction directed towards the outside of the mode selection button to bring the cover into the unlocking position; and in which said axial wall is capable of pivoting above said at least one axial projection when the cover is positioned in the unlocking position and the mode selection button is pivoted from the second position to the third position.
  • said at least one axial wall borders only part of a peripheral edge of the bottom.
  • the cover comprises two axial walls parallel to each other and parallel to a median plane, said median plane containing the axis of rotation.
  • the support comprises an additional axial projection disposed on one side of said median plane, said axial projection being disposed on the other side of said median plane, the axial projection being positioned such that the axial wall is disposed above of the additional axial projection when the mode selection button is positioned in third position.
  • said plate has only two peripheral edges, at least one opening being provided between the two peripheral edges, and in which said at least one axial wall of the cover covers said at least one opening; said at least one axial projection being able to pass through said at least one opening, when the cover is in the unlocked position and the mode selection button is pivoted towards the third position.
  • the mode selection button comprises at least one elastic element capable of acting between the base and the cover to maintain the cover in the locking position.
  • the sliding device comprises at least one axial hole arranged in said plate, and in which the complementary sliding device comprises at least one axial profile extending perpendicular to the bottom, said axial profile sliding in said axial hole, when the cover is moved from the locking position to the unlocking position.
  • the complementary sliding device comprises at least one support cap adapted to be fixed to a free end of said at least one axial profile, said axial profile having a diameter; the support cap having a diameter greater than the diameter of the axial profile, and in which said elastic element bears on the one hand against said at least one support cap and on the other hand against said plate.
  • said at least one axial profile has at least three branches which intersect, and in which said at least one support cap comprises tabs capable of being wedged between said branches of said at least one axial profile.
  • FIG. 1 illustrates a respiratory mask 100 placed in a pressurized cabin 8 of a commercial aircraft intended to transport crew members and generally also passengers.
  • a device pressurizes the cabin so that it is not lower than a pressurization pressure, generally corresponding to an altitude of between 1,500 meters and 2,400 meters.
  • a pressurization pressure generally corresponding to an altitude of between 1,500 meters and 2,400 meters.
  • the pressure in the cabin is substantially equal to the pressure outside the cabin and decreases until said pressurization pressure is reached.
  • the pressure in the cabin is then kept constant until the pressure outside becomes lower than the pressurization pressure.
  • the respiratory mask aims to allow its user to have sufficient oxygen and to be protected from harmful substances in the event of incidents, such as depressurization, presence of toxic gases or the like, preventing the occupants of the cabin from breathing normally .
  • the respiratory mask 100 includes a face cover 2 and a regulation assembly 1.
  • the oronasal face cover 2 is intended to be applied in a substantially sealing manner to a user's face around their nose and mouth.
  • the oronasal face cover 2 has a respiratory cavity 4 in which the user breathes.
  • the regulation assembly 1 comprises a support 10, a regulator, and a mode selection button 20 pivotally mounted on the support 10 around an axis of rotation Z.
  • the axis of rotation Z is perpendicular to the support 10 and s extends in the axial direction A.
  • the term “axial” is defined with respect to the axis of rotation Z in the present application, except when another axis is explicitly mentioned.
  • the axis of rotation Z and the axial direction A are coaxial and coincide.
  • the support 10 comprises a housing 13 and a plate 14 arranged on the housing 13 and suitable for closing it.
  • the housing 13 is provided with a respiratory gas supply port intended to receive the end of a pipe to connect the regulator to a source of respiratory gas containing essentially oxygen.
  • the regulator is housed in box 13. It operates in three operating modes. In the first operating mode, called “EMERGENCY" mode, the regulator supplies the breathing cavity 4 only with breathing gas until a slight excess pressure is reached in the breathing cavity 4 relative to the ambient pressure of the cabin air, generally this overpressure is between 3 mbar and 30 mbar. In the most common overpressure values, between 3 to 7 mbar, this overpressure value is hardly felt by the user. Beyond 10 to 12 mbar, the excess pressure requires a substantial additional effort from the user to breathe which is quickly felt by the user.
  • EMERGENCY the first operating mode
  • the regulator supplies the breathing cavity 4 only with breathing gas until a slight excess pressure is reached in the breathing cavity 4 relative to the ambient pressure of the cabin air, generally this overpressure is between 3 mbar and 30 mbar. In the most common overpressure values, between 3 to 7 mbar, this overpressure value is hardly felt by the user. Beyond 10 to 12 mbar, the excess pressure requires a substantial additional effort from the user to breathe which is quickly felt
  • the regulator supplies the respiratory cavity 4 only with respiratory gas until it reaches substantially the ambient pressure.
  • it is generally useful to plan to stop the supply to the breathing cavity before the breathing cavity reaches ambient pressure, so that there is a very slight depression (a few tenths of a mbar to a few mbar) in the respiratory cavity 4.
  • the third respiratory mode is distinguished from the second respiratory mode in that the respiratory cavity 4 is supplied with respiratory gas diluted with air, generally ambient air, the proportion of which is usually a function in particular of the pressure in cabin 8.
  • the mode selection button 20 has a first position indicated “EMER” and commanding the regulator to operate in the first mode.
  • the mode selection button 20 has a second position indicated “100%” and commanding the regulator to operate in the second mode.
  • the mode selection button 20 has a third position indicated “N” and commanding the regulator to operate in the third mode.
  • the axis of rotation Z of the selection button extends substantially vertically when the user holds his head vertically, so that the mode selection button 20 extends under the housing 13.
  • the mode selection button 20 could be placed differently, in particular on the front of the housing 13 and/or with an axis of rotation extending substantially horizontally.
  • the three positions of the mode selection button are discrete positions represented by notches.
  • a mark 11a is placed in the center of the width of the plate 14.
  • a median plane M is defined. This median plane M passes through the mark 11a and through the axis of rotation Z. The median plane M is perpendicular to the support 10.
  • the front face of the mode selection button has three inscriptions indicating the angular position of the mode selection button relative to the support 10.
  • the positions of the mode selection button are arranged in an arc of a circle.
  • the center of this arc of a circle is positioned on the axis of rotation Z.
  • the second position indicated “100%” is located between the first position “EMER” and the third position indicated “N”.
  • the first position “EMER” is written on one side of the median plane, hereinafter called the left side and the third position “N” is written on the other side of the median plane, hereinafter called right side.
  • the plate 14 comprises a hollow cylindrical body 16 extending in the axial direction A above and below the plate 14.
  • the cylindrical body 16 is positioned in the center of the support.
  • the cylindrical body 16 is provided with a through hole 18.
  • the plate 14 also includes an axial projection 22 extending above the plate.
  • the axial projection 22 has the shape of a straight block.
  • the axial projection is located on the side of the median plane M opposite the first position “EMER”, that is to say on the right side.
  • the axial projection 22 is positioned on the plate so as to be arranged under the axial wall 54, when the mode selection button is in the third position “N”, as visible on the Figure 7 .
  • the plate 14 may also include an additional axial projection 23 extending above the plate.
  • the additional axial projection 23 is located on the other side of the median plane M relative to the side containing the axial projection 22.
  • the additional axial projection 23 is positioned on the plate so as to be arranged under the axial wall 52 when the release button mode selection is in third position “N”, as visible on the Figure 7 .
  • the additional axial projection has the shape of an elongated straight block to provide a larger support surface for the axial wall 52.
  • the mode selection button 20 comprises a base 24 carried by the support 10, and a cover 48 carried by the base.
  • the base 24 comprises a plate 26 extending parallel to the support 10, two peripheral edges 28, 30 and a central crown 32 extending axially in the direction of the support.
  • the plate 26 is suitable for carrying the cover 48. It includes two axial holes 34, 36 arranged on either side of the central crown.
  • the axial holes 34 have a shape corresponding to the shape of the axial profiles described below. Thus, in the embodiment shown in the figures, the axial holes 34 have a cross shape. This form is in no way restrictive.
  • the central crown 32 is mounted movable in rotation around the cylindrical body 16.
  • the central crown 32 is provided with an internal shoulder 38.
  • a washer 40 of diameter greater than the diameter of the cylindrical body 16 is arranged on the cylindrical body and on a part of the inner shoulder 38.
  • a fixing screw 42 is screwed into a threaded metal insert of the housing 13. The axis of the fixing screw forms the axis of rotation Z of the selection button 20.
  • the peripheral edges 28, 30 extend axially towards the support 10 along two opposite transverse faces of the mode selection button.
  • Two openings 44, 46 are provided between the two peripheral edges. In the embodiment shown, the openings 44,46 are arranged laterally to the mode selection button.
  • the cover 48 comprises a bottom 50 extending parallel to the plate 14 of the support, two axial walls 52, 54, two axial profiles 56, 58 and two support caps 60, 62.
  • the bottom 50 is arranged against the plate 26 when the mode selection button 20 is in the locking position.
  • the two axial walls 52, 54 extend in an axial direction A towards the support. Each axial wall borders a part 59 only of the peripheral edge of the bottom.
  • the axial walls 52, 54 are arranged opposite each other.
  • the axial walls 52, 54 cover all of the openings 44,46 of the base when the cover 48 is in the locking position. Part of the openings 44,46 are uncovered when the cover 48 is in the unlocked position.
  • the two axial walls 52, 54 are parallel to each other and parallel to the median plane M.
  • the two axial walls 52, 54 are positioned laterally to the mode selection button.
  • the two axial profiles 56, 58 pass through the axial holes 34, 36 of the base plate.
  • Each support cap 60, 62 is mounted at the free end of each axial profile.
  • the diameter of each support cap 60, 62 is greater than the diameter of each axial profile 56, 58.
  • the axial profiles 56, 58 have four branches 68 which intersect.
  • the support caps 60, 62 include tabs 70 capable of being wedged between said branches of the axial profiles.
  • the mode selection button 20 also includes two elastic elements 64, 66 capable of acting between the base 24 and the cover 48 to maintain the cover in the locking position.
  • An elastic element 64, 66 is arranged around each axial profile. Each elastic element 64, 66 rests against the support cap 60, 62 and the plate 26 of the base.
  • the elastic elements can for example consist of compression springs.
  • the axial holes 34, 36 formed in the plate 26 constitute two sliding devices.
  • the axial profiles 56, 58, the elastic elements 64, 68 and the support caps 60, 62 constitute two complementary sliding devices.
  • the sliding devices are capable of cooperating with the complementary sliding devices to allow movement of the cover 48 relative to the base 24 in the axial direction A between the locking position and the unlocking position.
  • the sliding devices and the complementary sliding devices also make it possible to fix the cover to the base.
  • the cover 48 has a single axial wall.
  • the mode selection button comprises a single sliding device and a single complementary sliding device.
  • the mode selection button comprises more than two sliding devices and more than two complementary sliding devices.
  • the cover 48 is movable in the axial direction A relative to the base 24 between a locking position of the mode selection button 20 and an unlocking position of the mode selection button.
  • the lock position is shown on the figures 3 And 5 .
  • the locking position locks the rotation of the mode selection button 20 from the second position 100% towards the third position N.
  • the bottom of the cover 48 is in contact with the base 24.
  • the axial wall 54 abuts against the axial projection 22 and mechanically prevents the rotation of the mode selection button. mode selection.
  • the wearer of the respiratory mask 100 can rotate the mode selection button from the second "100%" position to the first "EMER" position by rotating the base-cover assembly around the axis of rotation Z .
  • the wearer of the mask pulls the cover in a direction S directed in the axial direction A and towards the outside of the mode selection button.
  • the bottom of the cover is at a distance from the base.
  • the elastic elements 64, 66 are compressed.
  • the axial walls 52, 54 are moved outwards so that part of the openings 44, 46 are exposed.
  • the free end of the axial wall 54 is located above the axial projection 22.
  • the unlocking position is illustrated on the Figure 4 . If the wearer of the mask pivots the mode selection button towards the third position "N", the axial wall 54 pivots away from the axial projection 22. In particular, the axial wall 54 pivots above the axial projection 22 The axial projection 22 passes through the opening 44, when the cover 48 is in the unlocked position and the mode selection button 20 pivots towards the third position "N", as illustrated in the Figure 6 .
  • unlocking position allows rotation of the mode selection button from the second “100%” position to the third “N” position.

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  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)

Description

Domaine technique de l'inventionTechnical field of the invention

La présente divulgation concerne un ensemble de régulation pour masque respiratoire d'un membre d'équipage d'avion.The present disclosure relates to a regulation assembly for a respiratory mask for an aircraft crew member.

Etat de la technique antérieureState of the prior art

De manière connue, un tel ensemble de régulation pour masque respiratoire d'un membre d'équipage d'avion, ledit ensemble comprend :

  • un support,
  • un bouton de sélection de mode propre à être déplacé entre au moins une première position (EMER), une deuxième position (100%) et une troisième position (N), la deuxième position (100%) étant positionnée entre la première position (EMER) et la troisième position (N),
  • un régulateur destiné à être alimenté par une source de gaz respiratoire et adapté pour alimenter une cavité respiratoire au moins dans trois modes de fonctionnement suivants :
    • lorsque le bouton de sélection de mode est dans la première position (EMER), le régulateur alimente la cavité respiratoire tant que la pression dans la cavité respiratoire n'est pas supérieure à une première pression relative par rapport à la pression ambiante,
    • lorsque le bouton de sélection de mode est dans la deuxième position (100%), le régulateur alimente la cavité respiratoire tant que la pression dans la cavité respiratoire n'est pas supérieure à une deuxième pression relative par rapport à la pression ambiante, la première pression étant supérieure à la deuxième pression,
    • lorsque le bouton de sélection de mode est dans la troisième position (N), le régulateur alimente la cavité respiratoire en gaz respiratoire dilué avec de l'air,
In known manner, such a regulation assembly for a respiratory mask of an aircraft crew member, said assembly comprises:
  • a support,
  • a mode selection button capable of being moved between at least a first position (EMER), a second position (100%) and a third position (N), the second position (100%) being positioned between the first position (EMER ) and the third position (N),
  • a regulator intended to be supplied by a source of respiratory gas and adapted to supply a respiratory cavity at least in three following operating modes:
    • when the mode selection button is in the first position (EMER), the regulator supplies the respiratory cavity as long as the pressure in the respiratory cavity is not greater than a first relative pressure compared to the ambient pressure,
    • when the mode selection button is in the second position (100%), the regulator supplies the breathing cavity as long as the pressure in the breathing cavity is not greater than a second relative pressure to the ambient pressure, the first pressure being greater than the second pressure,
    • when the mode selection button is in the third position (N), the regulator supplies the respiratory cavity with respiratory gas diluted with air,

La première position «EMER » correspond au mode « EMERGENCY ». Elle est à sélectionner en cas de fumée ou de feu dans le cockpit. La deuxième position « 100% » correspond au mode « 100% ». Elle offre une protection contre l'hypoxie. La troisième position « N » correspond au mode « NORMAL ». Elle permet de limiter la consommation d'oxygène en port préventif ou sur un palier en profil de descente. Le bouton de sélection est par défaut dans la deuxième position 100%. La deuxième position 100% est agencée au centre entre la première position et la troisième position.The first “EMER” position corresponds to “EMERGENCY” mode. It should be selected in the event of smoke or fire in the cockpit. The second position “100%” corresponds to “100%” mode. It offers protection against hypoxia. The third position “N” corresponds to “NORMAL” mode. It makes it possible to limit oxygen consumption in preventive wear or on a landing in descent profile. The selection button defaults to the second position 100%. The second 100% position is arranged in the center between the first position and the third position.

Le bouton de sélection de mode n'est pas visible par l'utilisateur lorsque le masque est porté. Actuellement, le bouton de sélection est asymétrique pour permettre à l'utilisateur de distinguer le sens de rotation conduisant au mode « EMERGENCY » et au mode « NORMAL » à l'aide du toucher. Le bouton de sélection dispose également de marquages latéraux afin de permettre une vérification du mode sélectionné par un tiers. Ainsi, les masques respiratoires actuels comportent des moyens donnant une information sur le mode de fonctionnement sélectionné à l'utilisateur, grâce à l'asymétrie du bouton, et aux tiers, à l'aide des marquages latéraux.The mode selection button is not visible to the user when the mask is worn. Currently, the selection button is asymmetrical to allow the user to distinguish the direction of rotation leading to “EMERGENCY” mode and “NORMAL” using touch. The selection button also has side markings to allow verification of the selected mode by a third party. Thus, current respiratory masks include means providing information on the selected operating mode to the user, thanks to the asymmetry of the button, and to third parties, using the side markings.

Malgré cette asymétrie, sans une connaissance importante et une utilisation fréquente du masque respiratoire, il est difficile de connaître le sens de rotation menant au mode « EMERGENCY » et au mode « NORMAL». En particulier, en cas d'urgence soudaine, l'utilisateur peut faire pivoter le bouton de sélection en mode « NORMAL » accidentellement et perdre la protection contre les fumées et gaz toxiques. L'utilisateur peut sélectionner le mauvais mode de fonctionnement si l'information est mal assimilée ou s'il réagit dans la précipitation. Un ensemble de régulation pour masque respiratoire d'un membre d'équipage est divulgué par la demande de brevet EP 2 937 113 A1 .Despite this asymmetry, without significant knowledge and frequent use of the respirator mask, it is difficult to know the direction of rotation leading to “EMERGENCY” mode and “NORMAL” mode. In particular, in the event of a sudden emergency, the user may rotate the selection button to "NORMAL" mode accidentally and lose protection against toxic fumes and gases. The user can select the wrong operating mode if the information is poorly assimilated or if he reacts in haste. A regulation assembly for a crew member's respiratory mask is disclosed by the application for patent EP 2 937 113 A1 .

Présentation de l'inventionPresentation of the invention

La présente divulgation a pour but de proposer un ensemble de régulation propre à éviter une sélection accidentelle du mode « NORMAL » à la place du mode « EMERGENCY ». La présente divulgation a pour but d'augmenter le niveau le niveau de sécurité des ensembles de régulation pour masque à oxygène en empêchant une mauvaise manipulation du bouton de sélection de mode.The purpose of this disclosure is to propose a regulation set capable of avoiding accidental selection of “NORMAL” mode instead of “EMERGENCY” mode. The present disclosure aims to increase the level of safety of oxygen mask control assemblies by preventing mishandling of the mode selection button.

Résumé de l'inventionSummary of the invention

L'invention concerne un ensemble de régulateur comme décrit ci-dessus dans lequel le bouton de sélection de mode comporte une embase montée pivotante sur le support par rapport à un axe de rotation, et un capot porté par l'embase ; ledit axe de rotation étant perpendiculaire au support et s'étendant selon une direction axiale ; ledit capot étant mobile selon la direction axiale par rapport à l'embase entre une position de verrouillage du bouton de sélection de mode et une position de déverrouillage du bouton de sélection de mode, la position de verrouillage verrouillant la rotation du bouton de sélection de mode de la deuxième position vers la troisième position, la position de déverrouillage autorisant la rotation du bouton de sélection de mode de la deuxième position vers la troisième position.The invention relates to a regulator assembly as described above in which the mode selection button comprises a base pivotally mounted on the support relative to an axis of rotation, and a cover carried by the base; said axis of rotation being perpendicular to the support and extending in an axial direction; said cover being movable in the axial direction relative to the base between a locking position of the mode selection button and an unlocking position of the mode selection button, the locking position locking the rotation of the mode selection button from the second position to the third position, the unlocking position allowing rotation of the mode selection button from the second position to the third position.

Avantageusement, la présente divulgation permet d'empêcher mécaniquement la sélection d'un mauvais mode de fonctionnement.Advantageously, the present disclosure makes it possible to mechanically prevent the selection of an incorrect operating mode.

Les caractéristiques exposées dans les paragraphes suivants peuvent, optionnellement, être mises en oeuvre. Elles peuvent être mises en oeuvre indépendamment les unes des autres ou en combinaison les unes avec les autres :
De préférence, le support comporte au moins une saillie axiale, et dans lequel le capot comporte un fond, et au moins une paroi axiale portée par le fond, ladite au moins une paroi axiale étant apte à venir en butée contre ladite au moins une saillie axiale lorsque le capot est positionné dans la position de verrouillage et que le bouton de sélection de mode est pivoté de la deuxième position vers la troisième position ; ladite au moins une paroi axiale étant propre à pivoter à distance de ladite au moins une saillie axiale lorsque le capot est positionné dans la position de déverrouillage et que le bouton de sélection de mode est pivoté de la deuxième position vers la troisième position .The characteristics explained in the following paragraphs can, optionally, be implemented. They can be implemented independently of each other or in combination with each other:
Preferably, the support comprises at least one axial projection, and in which the cover comprises a bottom, and at least one axial wall carried by the bottom, said at least one axial wall being able to abut against said at least one projection axial when the cover is positioned in the locking position and the mode selection button is pivoted from the second position to the third position; said at least one axial wall being capable of pivoting away from said at least one axial projection when the cover is positioned in the unlocking position and the mode selection button is pivoted from the second position towards the third position.

De préférence, l'embase comporte une platine s'étendant parallèlement au support; le fond étant en appui contre la platine lorsque le bouton de sélection de mode est dans la position de verrouillage ; l'embase comprend un dispositif de coulissement et le capot comprend un dispositif de coulissement complémentaire coopérant avec le dispositif de coulissement pour permettre le déplacement du capot par rapport à l'embase selon la direction axiale entre la position de verrouillage et la position de déverrouillage.Preferably, the base comprises a plate extending parallel to the support; the bottom resting against the plate when the mode selection button is in the locking position; the base comprises a sliding device and the cover comprises a complementary sliding device cooperating with the sliding device to allow movement of the cover relative to the base in the axial direction between the locking position and the unlocking position.

De préférence, le capot est apte à être tiré dans un sens dirigé vers l'extérieur du bouton de sélection de mode pour amener le capot en position de déverrouillage; et dans lequel ladite paroi axiale est apte à pivoter au-dessus de ladite au moins une saillie axiale lorsque le capot est positionné dans la position de déverrouillage et que le bouton de sélection de mode est pivoté de la deuxième position vers la troisième position. De préférence, ladite au moins une paroi axiale borde uniquement une partie d'un bord périphérique du fond. De préférence, le capot comporte deux parois axiales parallèles l'une à l'autre et parallèle à un plan médian, ledit plan médian contenant l'axe de rotation.Preferably, the cover is capable of being pulled in a direction directed towards the outside of the mode selection button to bring the cover into the unlocking position; and in which said axial wall is capable of pivoting above said at least one axial projection when the cover is positioned in the unlocking position and the mode selection button is pivoted from the second position to the third position. Preferably, said at least one axial wall borders only part of a peripheral edge of the bottom. Preferably, the cover comprises two axial walls parallel to each other and parallel to a median plane, said median plane containing the axis of rotation.

De préférence, le support comporte une saillie axiale supplémentaire disposée d'un côté dudit plan médian, ladite saillie axiale étant disposée de l'autre côté dudit plan médian, la saillie axiale étant positionnée de telle sorte que la paroi axiale est disposée au-dessus de la saillie axiale supplémentaire lorsque le bouton de sélection de mode est positionnée en troisième position.Preferably, the support comprises an additional axial projection disposed on one side of said median plane, said axial projection being disposed on the other side of said median plane, the axial projection being positioned such that the axial wall is disposed above of the additional axial projection when the mode selection button is positioned in third position.

De préférence, ladite platine présente uniquement deux rebords périphériques, au moins une ouverture étant aménagée entre les deux rebords périphériques, et dans lequel ladite au moins une paroi axiale du capot recouvre ladite au moins une ouverture ; ladite au moins une saillie axiale étant apte à passer au travers de ladite au moins une ouverture, lorsque le capot est dans la position de déverrouillage et que le bouton de sélection de mode est pivoté vers la troisième position.Preferably, said plate has only two peripheral edges, at least one opening being provided between the two peripheral edges, and in which said at least one axial wall of the cover covers said at least one opening; said at least one axial projection being able to pass through said at least one opening, when the cover is in the unlocked position and the mode selection button is pivoted towards the third position.

De préférence, le bouton de sélection de mode comporte au moins un élément élastique propre à agir entre l'embase et le capot pour maintenir le capot dans la position de verrouillage. De préférence, le dispositif de coulissement comporte au moins un trou axial aménagé dans ladite platine, et dans lequel le dispositif de coulissement complémentaire comprend au moins un profilé axial s'étendant perpendiculairement au fond, ledit profilé axial coulissant dans ledit trou axial, lorsque le capot est déplacé de la position de verrouillage à la position de déverrouillage. De préférence, le dispositif de coulissement complémentaire comprend au moins un capuchon d'appui propre à être fixé à une extrémité libre dudit au moins un profilé axial, ledit profilé axial présentant un diamètre ; le capuchon d'appui présentant un diamètre supérieur au diamètre du profilé axial, et dans lequel ledit élément élastique est en appui d'une part contre ledit au moins un capuchon d'appui et d'autre part contre ladite platine.Preferably, the mode selection button comprises at least one elastic element capable of acting between the base and the cover to maintain the cover in the locking position. Preferably, the sliding device comprises at least one axial hole arranged in said plate, and in which the complementary sliding device comprises at least one axial profile extending perpendicular to the bottom, said axial profile sliding in said axial hole, when the cover is moved from the locking position to the unlocking position. Preferably, the complementary sliding device comprises at least one support cap adapted to be fixed to a free end of said at least one axial profile, said axial profile having a diameter; the support cap having a diameter greater than the diameter of the axial profile, and in which said elastic element bears on the one hand against said at least one support cap and on the other hand against said plate.

De préférence, ledit au moins un profilé axial présente au moins trois branches qui se croisent, et dans lequel ledit au moins un capuchon d'appui comporte des pattes aptes à se coincer entre lesdites branches dudit au moins un profilé axial.Preferably, said at least one axial profile has at least three branches which intersect, and in which said at least one support cap comprises tabs capable of being wedged between said branches of said at least one axial profile.

Brève description des figuresBrief description of the figures

  • [Fig. 1] est une vue en perspective d'un masque respiratoire comportant un ensemble de régulation selon la présente invention ;[ Fig. 1 ] is a perspective view of a respiratory mask comprising a regulation assembly according to the present invention;
  • [Fig. 2] est une vue en perspective éclatée du bouton de sélection de mode et du support de l'ensemble de régulation selon l'invention ;[ Fig. 2 ] is an exploded perspective view of the mode selection button and the support of the regulation assembly according to the invention;
  • [Fig. 3] est une vue en perspective d'un côté du bouton de sélection de mode et du support, dans une position de verrouillage;[ Fig. 3 ] is a perspective view of one side of the mode selector button and bracket, in a locked position;
  • [Fig. 4] est une vue en perspective d'un autre côté du bouton de sélection de mode et du support, dans une position de déverrouillage ;[ Fig. 4 ] is a perspective view from another side of the mode selection button and the bracket, in an unlocked position;
  • [Fig. 5] est une vue en coupe du bouton de sélection et du support, selon un plan de coupe V-V illustré sur la figure 4 ;[ Fig. 5 ] is a sectional view of the selection button and the support, according to a sectional plan VV illustrated on the Figure 4 ;
  • [Fig. 6] est une vue de dessus du bouton de sélection de mode, lorsque le bouton de sélection de mode est la troisième position « N » ;[ Fig. 6 ] is a top view of the mode selection button, when the mode selection button is the third position “N”;
  • [Fig. 7] est une vue en coupe du bouton de sélection de mode et du support, lorsque le bouton de sélection de mode est dans la troisième position « N »; le plan de coupe étant perpendiculaire à un axe de rotation Z du bouton de sélection de mode ; et[ Fig. 7 ] is a sectional view of the mode selection button and the bracket, when the mode selection button is in the third position “N”; the cutting plane being perpendicular to an axis of rotation Z of the mode selection button; And
  • [Fig. 8] est une vue en perspective d'un côté d'un bouton de sélection de mode, dans une position de déverrouillage[ Fig. 8 ] is a perspective view of one side of a mode selector button, in an unlocked position
Description détaillée de l'inventionDetailed description of the invention

Les dessins et la description ci-après contiennent, pour l'essentiel, des éléments de caractère certain. Ils pourront donc non seulement servir à mieux faire comprendre la présente divulgation, mais aussi contribuer à sa définition, le cas échéant. Dans la description ci-dessous, les termes « au-dessus », « en-dessous », « droite », « gauche » etc sont utilisés en référence à la figure 6 et ne sont nullement limitatif.The drawings and description below contain, for the most part, elements of a certain nature. They can therefore not only be used to better understand this disclosure, but also contribute to its definition, if necessary. In the description below, the terms "above", "below", "right", "left" etc. are used in reference to the Figure 6 and are in no way restrictive.

La figure 1 illustre un masque respiratoire 100 disposé dans une cabine 8 pressurisée d'un avion commercial destiné à transporter des membres d'équipage et généralement également des passagers.There figure 1 illustrates a respiratory mask 100 placed in a pressurized cabin 8 of a commercial aircraft intended to transport crew members and generally also passengers.

Un dispositif, de préférence de type dit isobare, pressurise la cabine pour qu'elle ne soit pas inférieure à une pression de pressurisation, correspondant généralement à une altitude comprise entre 1 500 mètres et 2 400 mètres. Lorsque l'avion s'élève, la pression dans la cabine est sensiblement égale à la pression à l'extérieure de la cabine et diminue, jusqu'à atteindre ladite pression de pressurisation. En conditions normales, la pression dans la cabine est alors maintenue constante jusqu'à ce que la pression à l'extérieure devienne inférieure à la pression de pressurisation. Le masque respiratoire vise à permettre à son utilisateur de disposer de suffisamment d'oxygène et d'être protégé de substances nocives en cas d'incidents, tels que dépressurisation, présence de gaz toxiques ou analogues, empêchant les occupants de la cabine de respirer normalement.A device, preferably of the so-called isobaric type, pressurizes the cabin so that it is not lower than a pressurization pressure, generally corresponding to an altitude of between 1,500 meters and 2,400 meters. When the aircraft rises, the pressure in the cabin is substantially equal to the pressure outside the cabin and decreases until said pressurization pressure is reached. Under normal conditions, the pressure in the cabin is then kept constant until the pressure outside becomes lower than the pressurization pressure. The respiratory mask aims to allow its user to have sufficient oxygen and to be protected from harmful substances in the event of incidents, such as depressurization, presence of toxic gases or the like, preventing the occupants of the cabin from breathing normally .

Le masque respiratoire 100 comprend un couvre face 2 et un ensemble de régulation 1.The respiratory mask 100 includes a face cover 2 and a regulation assembly 1.

Le couvre face oronasal 2 est destiné à être appliqué de manière sensiblement étanche sur le visage d'un utilisateur autour de son nez et de sa bouche. Le couvre face oronasal 2 présente une cavité respiratoire 4 dans laquelle l'utilisateur respire.The oronasal face cover 2 is intended to be applied in a substantially sealing manner to a user's face around their nose and mouth. The oronasal face cover 2 has a respiratory cavity 4 in which the user breathes.

L'ensemble de régulation 1 comprend un support 10, un régulateur, et un bouton de sélection de mode 20 monté pivotant sur le support 10 autour d'un axe de rotation Z. L'axe de rotation Z est perpendiculaire au support 10 et s'étend selon la direction axiale A. Le terme « axial » est défini par rapport à l'axe de rotation Z dans la présente demande, sauf lorsque qu'un autre axe est explicitement mentionné. L'axe de rotation Z et la direction axiale A sont coaxiaux et confondus.The regulation assembly 1 comprises a support 10, a regulator, and a mode selection button 20 pivotally mounted on the support 10 around an axis of rotation Z. The axis of rotation Z is perpendicular to the support 10 and s extends in the axial direction A. The term “axial” is defined with respect to the axis of rotation Z in the present application, except when another axis is explicitly mentioned. The axis of rotation Z and the axial direction A are coaxial and coincide.

Le support 10 comprend un boitier 13 et une plaque 14 agencée sur le boitier 13 et propre à le refermer. Le boitier 13 est muni d'un orifice d'alimentation en gaz respiratoire destiné à recevoir l'extrémité d'un tuyau pour relier le régulateur à une source de gaz respiratoire contenant essentiellement de l'oxygène.The support 10 comprises a housing 13 and a plate 14 arranged on the housing 13 and suitable for closing it. The housing 13 is provided with a respiratory gas supply port intended to receive the end of a pipe to connect the regulator to a source of respiratory gas containing essentially oxygen.

Le régulateur est logé dans le boitier 13. Il fonctionne selon trois modes de fonctionnement. Dans le premier mode de fonctionnement, dénommé mode "EMERGENCY", le régulateur alimente la cavité respiratoire 4 uniquement en gaz respiratoire jusqu'à atteindre une légère surpression dans la cavité respiratoire 4 par rapport à la pression ambiante de l'air de la cabine, généralement cette surpression est comprise entre 3 mbar et 30 mbar. Dans les valeurs de surpression les plus courantes, entre 3 à 7 mbar, cette valeur de surpression n'est guère ressentie par l'utilisateur. Au-delà de 10 à 12 mbar, la surpression demande un effort supplémentaire substantiel à l'utilisateur pour respirer qui est rapidement ressenti par l'utilisateur.The regulator is housed in box 13. It operates in three operating modes. In the first operating mode, called "EMERGENCY" mode, the regulator supplies the breathing cavity 4 only with breathing gas until a slight excess pressure is reached in the breathing cavity 4 relative to the ambient pressure of the cabin air, generally this overpressure is between 3 mbar and 30 mbar. In the most common overpressure values, between 3 to 7 mbar, this overpressure value is hardly felt by the user. Beyond 10 to 12 mbar, the excess pressure requires a substantial additional effort from the user to breathe which is quickly felt by the user.

Dans le deuxième mode de fonctionnement, dénommé mode "100%", le régulateur alimente la cavité respiratoire 4 uniquement en gaz respiratoire jusqu'à atteindre sensiblement la pression ambiante. En pratique, il est généralement utile de prévoir d'arrêter l'alimentation de la cavité respiratoire avant que la cavité respiratoire atteigne la pression ambiante, de sorte qu'il existe une très légère dépression (quelques dixièmes de mbar à quelques mbar) dans la cavité respiratoire 4.In the second operating mode, called "100%" mode, the regulator supplies the respiratory cavity 4 only with respiratory gas until it reaches substantially the ambient pressure. In practice, it is generally useful to plan to stop the supply to the breathing cavity before the breathing cavity reaches ambient pressure, so that there is a very slight depression (a few tenths of a mbar to a few mbar) in the respiratory cavity 4.

Le troisième mode respiratoire, dit "NORMAL", se distingue du deuxième mode respiratoire en ce que la cavité respiratoire 4 est alimentée en gaz respiratoire dilué avec de l'air, généralement de l'air ambiant, dont la proportion est habituellement fonction notamment de la pression dans la cabine 8.The third respiratory mode, called "NORMAL", is distinguished from the second respiratory mode in that the respiratory cavity 4 is supplied with respiratory gas diluted with air, generally ambient air, the proportion of which is usually a function in particular of the pressure in cabin 8.

En référence à la figure 3, le bouton de sélection de mode 20 présente une première position indiquée « EMER » et commandant au régulateur de fonctionner dans le premier mode. Le bouton de sélection de mode 20 présente une deuxième position indiquée « 100%» et commandant au régulateur de fonctionner dans le deuxième mode. Le bouton de sélection de mode 20 présente une troisième position indiquée « N » et commandant au régulateur de fonctionner dans le troisième mode.In reference to the Figure 3 , the mode selection button 20 has a first position indicated “EMER” and commanding the regulator to operate in the first mode. The mode selection button 20 has a second position indicated "100%" and commanding the regulator to operate in the second mode. The mode selection button 20 has a third position indicated "N" and commanding the regulator to operate in the third mode.

Dans le mode de réalisation illustré, l'axe de rotation Z du bouton de sélection s'étend sensiblement verticalement lorsque l'utilisateur tient sa tête verticalement, de sorte que le bouton de sélection de mode 20 s'étend sous le boitier 13. Bien entendu, le bouton de sélection de mode 20 pourrait être placé différemment, notamment sur le devant du boitier 13 et/ou avec un axe de rotation s'étendant sensiblement horizontalement. De manière connue, les trois positions du bouton de sélection de mode sont des positions discrètes matérialisées par des crans.In the illustrated embodiment, the axis of rotation Z of the selection button extends substantially vertically when the user holds his head vertically, so that the mode selection button 20 extends under the housing 13. Well Of course, the mode selection button 20 could be placed differently, in particular on the front of the housing 13 and/or with an axis of rotation extending substantially horizontally. In known manner, the three positions of the mode selection button are discrete positions represented by notches.

Un repère 11a est disposé au centre de la largeur de la plaque 14. Pour faciliter la compréhension de la présente invention, un plan médian M est défini. Ce plan médian M passe par le repère 11a et par l'axe de rotation Z. Le plan médian M est perpendiculaire au support 10.A mark 11a is placed in the center of the width of the plate 14. To facilitate understanding of the present invention, a median plane M is defined. This median plane M passes through the mark 11a and through the axis of rotation Z. The median plane M is perpendicular to the support 10.

La face avant du bouton de sélection de mode comporte trois inscriptions indiquant la position angulaire du bouton de sélection de mode par rapport au support 10. Les positions du bouton de sélection de mode sont disposées selon un arc de cercle. Le centre de cet arc de cercle est positionné sur l'axe de rotation Z. La deuxième position indiquée « 100%» est située entre la première position "EMER" et la troisième position indiquée « N ».The front face of the mode selection button has three inscriptions indicating the angular position of the mode selection button relative to the support 10. The positions of the mode selection button are arranged in an arc of a circle. The center of this arc of a circle is positioned on the axis of rotation Z. The second position indicated “100%” is located between the first position “EMER” and the third position indicated “N”.

Dans le mode de réalisation représenté, la première position « EMER » est inscrite d'un côté du plan médian, ci-après appelé côté gauche et la troisième position « N » est inscrite de l'autre côté du plan médian, ci-après appelé côté droit.In the embodiment shown, the first position “EMER” is written on one side of the median plane, hereinafter called the left side and the third position “N” is written on the other side of the median plane, hereinafter called right side.

Pour permettre une visualisation par le côté de la position de sélection de mode 20, trois inscriptions sont marquées sur les parois latérales du bouton de sélection de mode et deux repères latéraux 11b sont marqués sur les bords de la plaque 14.To allow viewing from the side of the mode selection position 20, three inscriptions are marked on the side walls of the mode selection button and two side markers 11b are marked on the edges of the plate 14.

En référence à la figure 5, la plaque 14 comporte un corps cylindrique 16 creux s'étendant selon la direction axiale A au-dessus et en dessous de la plaque 14. Dans le mode de réalisation représenté, le corps cylindrique 16 est positionné au centre du support. Le corps cylindrique 16 est muni d'un trou traversant 18. La plaque 14 comporte également une saillie axiale 22 s'étendant au-dessus de la plaque. Dans le mode de réalisation représenté, la saillie axiale 22 présente une forme de pavé droit. La saillie axiale est située du côté du plan médian M opposé à la première position « EMER » c'est-à-dire du côté droit. La saillie axiale 22 est positionnée sur la plaque de manière à être disposée sous la paroi axiale 54, lorsque le bouton de sélection de mode est en troisième position « N », comme visible sur la figure 7. En référence aux figures 6 à 8, la plaque 14 peut également comporter une saillie axiale supplémentaire 23 s'étendant au-dessus de la plaque. La saillie axiale supplémentaire 23 est située de l'autre côté du plan médian M par rapport au côté contenant la saillie axiale 22. La saillie axiale supplémentaire 23 est positionnée sur la plaque de manière à être disposée sous la paroi axiale 52 lorsque le bouton de sélection de mode est en troisième position « N », comme visible sur la figure 7. Avantageusement, la saillie axiale supplémentaire présente la forme d'un pavé droit allongé pour offrir une plus grande surface d'appui pour la paroi axiale 52.In reference to the Figure 5 , the plate 14 comprises a hollow cylindrical body 16 extending in the axial direction A above and below the plate 14. In the embodiment shown, the cylindrical body 16 is positioned in the center of the support. The cylindrical body 16 is provided with a through hole 18. The plate 14 also includes an axial projection 22 extending above the plate. In the embodiment shown, the axial projection 22 has the shape of a straight block. The axial projection is located on the side of the median plane M opposite the first position “EMER”, that is to say on the right side. The axial projection 22 is positioned on the plate so as to be arranged under the axial wall 54, when the mode selection button is in the third position “N”, as visible on the Figure 7 . With reference to figures 6 to 8 , the plate 14 may also include an additional axial projection 23 extending above the plate. The additional axial projection 23 is located on the other side of the median plane M relative to the side containing the axial projection 22. The additional axial projection 23 is positioned on the plate so as to be arranged under the axial wall 52 when the release button mode selection is in third position “N”, as visible on the Figure 7 . Advantageously, the additional axial projection has the shape of an elongated straight block to provide a larger support surface for the axial wall 52.

En référence aux figures 2 à 5, le bouton de sélection de mode 20 comporte une embase 24 portée par le support 10, et un capot 48 porté par l'embase.With reference to figures 2 to 5 , the mode selection button 20 comprises a base 24 carried by the support 10, and a cover 48 carried by the base.

L'embase 24 comporte une platine 26 s'étendant parallèlement au support 10, deux rebords périphériques 28, 30 et une couronne centrale 32 s'étendant axialement en direction du support. La platine 26 est propre à porter le capot 48. Elle comprend deux trous axiaux 34, 36 disposés de part et d'autre de la couronne centrale. Les trous axiaux 34 présentent une forme correspondant à la forme des profilés axiaux décrit ci-après. Ainsi, dans le mode de réalisation représenté sur les figures, les trous axiaux 34 présentent une forme de croix. Cette forme n'est nullement limitative.The base 24 comprises a plate 26 extending parallel to the support 10, two peripheral edges 28, 30 and a central crown 32 extending axially in the direction of the support. The plate 26 is suitable for carrying the cover 48. It includes two axial holes 34, 36 arranged on either side of the central crown. The axial holes 34 have a shape corresponding to the shape of the axial profiles described below. Thus, in the embodiment shown in the figures, the axial holes 34 have a cross shape. This form is in no way restrictive.

La couronne centrale 32 est montée mobile en rotation autour du corps cylindrique 16. La couronne centrale 32 est munie d'un épaulement intérieur 38. Une rondelle 40 de diamètre supérieur au diamètre du corps cylindrique 16 est agencée sur le corps cylindrique et sur une partie de l'épaulement intérieur 38. Une vis de fixation 42 est visée dans un insert métallique taraudé du boitier 13 L'axe de la vis de fixation forme l'axe de rotation Z du bouton de sélection 20.The central crown 32 is mounted movable in rotation around the cylindrical body 16. The central crown 32 is provided with an internal shoulder 38. A washer 40 of diameter greater than the diameter of the cylindrical body 16 is arranged on the cylindrical body and on a part of the inner shoulder 38. A fixing screw 42 is screwed into a threaded metal insert of the housing 13. The axis of the fixing screw forms the axis of rotation Z of the selection button 20.

Les rebords périphériques 28, 30 s'étendent axialement en direction du support 10 le long de deux faces transversales opposées du bouton de sélection de mode. Deux ouvertures 44, 46 sont aménagées entre les deux rebords périphériques. Dans le mode réalisation représenté, les ouvertures 44,46 sont disposées latéralement au bouton de sélection de mode.The peripheral edges 28, 30 extend axially towards the support 10 along two opposite transverse faces of the mode selection button. Two openings 44, 46 are provided between the two peripheral edges. In the embodiment shown, the openings 44,46 are arranged laterally to the mode selection button.

Le capot 48 comporte un fond 50 s'étendant parallèlement à la plaque 14 du support, deux parois axiales 52, 54, deux profilés axiaux 56, 58 et deux capuchons d'appui 60, 62.The cover 48 comprises a bottom 50 extending parallel to the plate 14 of the support, two axial walls 52, 54, two axial profiles 56, 58 and two support caps 60, 62.

Le fond 50 est agencé contre la platine 26 lorsque le bouton de sélection de mode 20 est dans la position de verrouillage. Les deux parois axiales 52, 54 s'étendent selon une direction axiale A en direction du support. Chaque paroi axiale borde une partie 59 uniquement du bord périphérique du fond. Les parois axiales 52, 54 sont disposées en vis-à-vis l'une de l'autre. Les parois axiales 52, 54 recouvrent l'ensemble des ouvertures 44,46 de l'embase lorsque le capot 48 est dans la position de verrouillage. Une partie des ouvertures 44,46 sont découvertes lorsque le capot 48 est dans la position de déverrouillage. Avantageusement, dans le mode de réalisation représenté, les deux parois axiales 52, 54 sont parallèles l'une à l'autre et parallèle au plan médian M. Les deux parois axiales 52, 54 sont positionnées latéralement au bouton de sélection de mode.The bottom 50 is arranged against the plate 26 when the mode selection button 20 is in the locking position. The two axial walls 52, 54 extend in an axial direction A towards the support. Each axial wall borders a part 59 only of the peripheral edge of the bottom. The axial walls 52, 54 are arranged opposite each other. The axial walls 52, 54 cover all of the openings 44,46 of the base when the cover 48 is in the locking position. Part of the openings 44,46 are uncovered when the cover 48 is in the unlocked position. Advantageously, in the embodiment shown, the two axial walls 52, 54 are parallel to each other and parallel to the median plane M. The two axial walls 52, 54 are positioned laterally to the mode selection button.

Les deux profilés axiaux 56, 58 traversent les trous axiaux 34, 36 de la platine de l'embase. Chaque capuchon d'appui 60, 62 est monté à l'extrémité libre de chaque profilé axial. Le diamètre de chaque capuchon d'appui 60, 62 est supérieur au diamètre de chaque profilé axial 56, 58.The two axial profiles 56, 58 pass through the axial holes 34, 36 of the base plate. Each support cap 60, 62 is mounted at the free end of each axial profile. The diameter of each support cap 60, 62 is greater than the diameter of each axial profile 56, 58.

Dans le mode de réalisation représenté, les profilés axiaux 56, 58 présentent quatre branches 68 qui se croisent. Les capuchons d'appui 60, 62 comportent des pattes 70 propres à se coincer entre lesdites branches des profilés axiaux.In the embodiment shown, the axial profiles 56, 58 have four branches 68 which intersect. The support caps 60, 62 include tabs 70 capable of being wedged between said branches of the axial profiles.

Le bouton de sélection de mode 20 comporte également deux éléments élastiques 64, 66 propres à agir entre l'embase 24 et le capot 48 pour maintenir le capot dans la position de verrouillage. Un élément élastique 64, 66 est aménagé autour de chaque profilé axial. Chaque élément élastique 64, 66 est en appui contre le capuchon d'appui 60, 62 et la platine 26 de l'embase. Les éléments élastiques peuvent par exemple être constitués par des ressorts de compression.The mode selection button 20 also includes two elastic elements 64, 66 capable of acting between the base 24 and the cover 48 to maintain the cover in the locking position. An elastic element 64, 66 is arranged around each axial profile. Each elastic element 64, 66 rests against the support cap 60, 62 and the plate 26 of the base. The elastic elements can for example consist of compression springs.

Les trous axiaux 34, 36 formés dans la platine 26 constituent deux dispositifs de coulissement. Les profilés axiaux 56, 58, les éléments élastiques 64, 68 et les capuchons d'appui 60, 62 constituent deux dispositifs de coulissement complémentaires. Les dispositifs de coulissement sont propres à coopérer avec les dispositifs de coulissement complémentaires pour permettre le déplacement du capot 48 par rapport à l'embase 24 selon la direction axiale A entre la position de verrouillage et la position de déverrouillage. Les dispositifs de coulissement et les dispositifs de coulissement complémentaires permettent également de fixer le capot à l'embase.The axial holes 34, 36 formed in the plate 26 constitute two sliding devices. The axial profiles 56, 58, the elastic elements 64, 68 and the support caps 60, 62 constitute two complementary sliding devices. The sliding devices are capable of cooperating with the complementary sliding devices to allow movement of the cover 48 relative to the base 24 in the axial direction A between the locking position and the unlocking position. The sliding devices and the complementary sliding devices also make it possible to fix the cover to the base.

En variante, le capot 48 comporte une unique paroi axiale.Alternatively, the cover 48 has a single axial wall.

En variante, le bouton de sélection de mode comporte un seul dispositif de coulissement et un seul dispositif de coulissement complémentaire.Alternatively, the mode selection button comprises a single sliding device and a single complementary sliding device.

En variante, le bouton de sélection de mode comporte plus de deux dispositifs de coulissement et plus de deux dispositifs de coulissement complémentaires.Alternatively, the mode selection button comprises more than two sliding devices and more than two complementary sliding devices.

En fonctionnement, le capot 48 est mobile selon la direction axiale A par rapport à l'embase 24 entre une position de verrouillage du bouton de sélection de mode 20 et une position de déverrouillage du bouton de sélection de mode.In operation, the cover 48 is movable in the axial direction A relative to the base 24 between a locking position of the mode selection button 20 and an unlocking position of the mode selection button.

La position de verrouillage est illustrée sur les figures 3 et 5. La position de verrouillage verrouille la rotation du bouton de sélection de mode 20 de la deuxième position 100% vers la troisième position N. Dans cette position, le fond du capot 48 est en contact de l'embase 24. Lorsque le bouton de sélection de mode 20 est dans la position de verrouillage et que le porteur du masque fait pivoter le bouton de sélection de mode vers la troisième position « N », la paroi axiale 54 vient en butée contre la saillie axiale 22 et empêche mécaniquement la rotation du bouton de sélection de mode. Par contre, le porteur du masque respiratoire 100 peut faire pivoter le bouton de sélection de mode de la deuxième position « 100% » vers la première position « EMER » par rotation de l'ensemble embase-capot autour de l'axe de rotation Z.The lock position is shown on the figures 3 And 5 . The locking position locks the rotation of the mode selection button 20 from the second position 100% towards the third position N. In this position, the bottom of the cover 48 is in contact with the base 24. When the mode selection button mode 20 is in the locking position and the wearer of the mask pivots the mode selection button towards the third position "N", the axial wall 54 abuts against the axial projection 22 and mechanically prevents the rotation of the mode selection button. mode selection. On the other hand, the wearer of the respiratory mask 100 can rotate the mode selection button from the second "100%" position to the first "EMER" position by rotating the base-cover assembly around the axis of rotation Z .

Pour mettre le bouton de sélection de mode en position de déverrouillage, le porteur du masque tire le capot dans un sens S dirigé selon la direction axiale A et vers l'extérieur du bouton de sélection de mode. Le fond du capot est à distance de l'embase. Les éléments élastiques 64, 66 sont comprimés. Les parois axiales 52, 54 sont déplacés vers l'extérieur de sorte qu'une partie ouvertures 44, 46 sont découvertes. Dans cette position de déverrouillage, l'extrémité libre de la paroi axiale 54 est située au-dessus de la saillie axiale 22. La position de déverrouillage est illustrée sur la figure 4. Si le porteur du masque fait pivoter le bouton de sélection de mode vers la troisième position « N », la paroi axiale 54 pivote à distance de la saillie axiale 22. En particulier, la paroi axiale 54 pivote au-dessus de la saillie axiale 22. La saillie axiale 22 passe au travers de l'ouverture 44, lorsque le capot 48 est dans la position de déverrouillage et que le bouton de sélection de mode 20 pivote vers la troisième position « N », comme illustré sur la figure 6.To put the mode selection button in the unlocked position, the wearer of the mask pulls the cover in a direction S directed in the axial direction A and towards the outside of the mode selection button. The bottom of the cover is at a distance from the base. The elastic elements 64, 66 are compressed. The axial walls 52, 54 are moved outwards so that part of the openings 44, 46 are exposed. In this unlocking position, the free end of the axial wall 54 is located above the axial projection 22. The unlocking position is illustrated on the Figure 4 . If the wearer of the mask pivots the mode selection button towards the third position "N", the axial wall 54 pivots away from the axial projection 22. In particular, the axial wall 54 pivots above the axial projection 22 The axial projection 22 passes through the opening 44, when the cover 48 is in the unlocked position and the mode selection button 20 pivots towards the third position "N", as illustrated in the Figure 6 .

Ainsi, la position de déverrouillage autorise la rotation du bouton de sélection de mode de la deuxième position « 100% » vers la troisième position « N ».Thus, the unlocking position allows rotation of the mode selection button from the second “100%” position to the third “N” position.

Lorsque le mode N est sélectionné ; l'utilisateur relâche le capot 48 qui, sous l'effet des éléments élastiques 64, 66, revient en appui sur les deux saillies axiales 22, 23. De la sorte, le capot 48 reste dans une position déverrouillée et l'utilisateur n'aura pas à le soulever de nouveau pour revenir de la troisième position « N » vers la deuxième position « 100% ». Lors de cette rotation, dès que les parois 54 et 56 ne sont plus en appui sur les deux saillies axiales 22, 23, les éléments élastiques 64, 66 remettent le capot 48 en position verrouillée. Avantageusement, cet appui sur les saillies axiales 22, 23 permet, en cas d'urgence, de passer sans entrave de la troisième position « N » à la première position « EMER ».When N mode is selected; the user releases the cover 48 which, under the effect of the elastic elements 64, 66, comes back to rest on the two axial projections 22, 23. In this way, the cover 48 remains in an unlocked position and the user does not will not have to lift it again to return from the third position “N” to the second position “100%”. During this rotation, as soon as the walls 54 and 56 no longer rest on the two axial projections 22, 23, the elastic elements 64, 66 return the cover 48 to the locked position. Advantageously, this support on the axial projections 22, 23 allows, in the event of an emergency, to pass without hindrance from the third position “N” to the first position “EMER”.

Claims (12)

  1. A control assembly (1) for a breathing mask for an aircraft crew member, said assembly comprising:
    - a support (10),
    - a mode selection button (20) capable of being switched between at least a first position (EMER), a second position (100%) and a third position (N), the second position (100%) being positioned between the first position (EMER) and the third position (N),
    - a controller intended to be supplied by a source of breathing gas and adapted for supplying a breathing cavity at least in the following three operating modes:
    - when the mode selection button (20) is in the first position (EMER), the controller supplies the breathing cavity as long as the pressure in the breathing cavity is not greater than a first pressure relative to the ambient pressure,
    - when the mode selection button (20) is in the second position (100%), the controller supplies the breathing cavity as long as the pressure in the breathing cavity is not greater than a second pressure relative to the ambient pressure, the first pressure being greater than the second pressure,
    - when the mode selection button (20) is in the third position (N), the controller supplies the breathing cavity with breathing gas diluted with air, characterised in that the mode selection button (20) includes a base (24) pivotally mounted on the support (10) relative to an axis of rotation (Z), and a cover (48) carried by the base (24); said axis of rotation (Z) being perpendicular to the support and extending in an axial direction (A); said cover (48) being movable in the axial direction (A) relative to the base (24) between a locking position of the mode selection button and an unlocking position of the mode selection button, the locking position locking the rotation of the mode selection button (20) from the second position (100%) to the third position (N), the unlocking position authorising the rotation of the mode selection button from the second position (100%) to the third position (N).
  2. The control assembly (1) according to claim 1, wherein the support (10) includes at least one axial projection (22), and wherein the cover (48) includes a bottom (50), and at least one axial wall (52, 54) carried by the bottom, said at least one axial wall (52, 54) being capable of abutting against said at least one axial projection (22) when the cover (48) is positioned in the locking position and the mode selection button (20) is pivoted from the second position (100%) to the third position (N); said at least one axial wall (52, 54) being capable of pivoting away from said at least one axial projection (22) when the cover (48) is positioned in the unlocked position and the mode selection button (20) is rotated from the second position (100%) to the third position (N).
  3. The control assembly (1) according to claim 2, wherein the base (24) includes a plate (26) extending parallel to the support (10); the bottom (50) bearing against the plate (26) when the mode selection button (20) is in the locking position; the base (24) comprises a sliding device (34, 36) and the cover (48) comprises a complementary sliding device (56, 58, 60, 62) cooperating with the sliding device to allow movement of the cover (48) relative to the base (24) in the axial direction (A) between the locking position and the unlocking position.
  4. The control assembly (1) according to any one of claims 2 and 3; wherein the cover (48) is able to be pulled in a direction (S) directed towards the outside of the mode selection button (20) to bring the cover (48) into the unlocked position; and wherein said axial wall (52, 54) is able to be pivoted above said at least one axial projection (22) when the cover (48) is positioned in the unlocked position and the mode selection button (20) is pivoted from the second position (100%) to the third position (N).
  5. The control assembly (1) according to any one of claims 2 to 4, wherein said at least one axial wall (52, 54) borders only a portion (59) of a peripheral edge of the bottom (50).
  6. The control assembly (1) according to any one of claims 2 to 5, wherein the cover (48) includes two axial walls (52, 54) parallel to each other and parallel to a median plane (M), said median plane (M) containing the axis of rotation (Z).
  7. The control assembly (1) according to claim 6, wherein the support (10) includes an additional axial projection (23) disposed on one side of said median plane (M), said axial projection (22) being disposed on the other side of said median plane (M), the axial projection being positioned such that the axial wall (52) is disposed above the additional axial projection when the mode selection button (20) is positioned in the third position (N).
  8. The control assembly (1) according to any one of claims 3 to 7, wherein said plate (26) has only two peripheral flanges (28, 30), at least one opening (44, 46) being formed between the two peripheral flanges (28, 30), and wherein said at least one axial wall (52, 54) of the cover covers said at least one opening (44, 46); said at least one axial projection (22) being adapted to pass through said at least one opening (44, 46), when the cover (48) is in the unlocked position and the mode selection button (20) is rotated to the third position (N).
  9. The control assembly (1) according to any one of claims 1 to 8, wherein the mode selection button (20) includes at least one elastic element (64, 66) able to act between the base (24) and the cover (48) to hold the cover in the locking position.
  10. The control assembly (1) according to claim 3, wherein the sliding device includes at least one axial hole (34,36) formed in said plate (26), and wherein the complementary sliding device (56, 58, 60, 62) comprises at least one axial profile (56, 58) extending perpendicular to the bottom (50), said axial profile (56, 58) sliding in said axial hole (34, 36), when the cover (48) is moved from the locked position to the unlocked position.
  11. The control assembly (1) according to the combination of claims 9 and 10, wherein the complementary sliding device comprises at least one bearing cap (60, 62) capable of being fixed to a free end of said at least one axial profile (56, 58), said axial profile (56, 58) having a diameter; the bearing cap (60, 62) having a diameter greater than the diameter of the axial profile, and wherein said elastic element (64, 66) bears on the one hand against said at least one bearing cap (60, 62) and on the other hand against said plate (26).
  12. The control assembly (1) according to any one of claims 10 and 11, wherein said at least one axial profile (56, 58) has at least three branches (68) which intersect, and wherein said at least one bearing cap (60, 62) includes lugs (70) capable of being wedged between said branches (68) of said at least one axial profile (56, 58).
EP20305856.5A 2020-07-24 2020-07-24 Control assembly for a breathing mask for an aircraft crew member Active EP3943162B1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP20305856.5A EP3943162B1 (en) 2020-07-24 2020-07-24 Control assembly for a breathing mask for an aircraft crew member
PCT/EP2021/070450 WO2022018169A1 (en) 2020-07-24 2021-07-21 Regulator assembly for an aircrew breathing mask
US18/006,714 US20230293916A1 (en) 2020-07-24 2021-07-21 Regulator assembly for an aircrew breathing mask
BR112022026895A BR112022026895A2 (en) 2020-07-24 2021-07-21 ADJUSTMENT SET FOR BREATHING MASK OF AN AIRCRAFT CREW MEMBER
CN202180061145.0A CN116133723A (en) 2020-07-24 2021-07-21 Regulator assembly for crew breathing mask
EP21749134.9A EP4185391B1 (en) 2020-07-24 2021-07-21 Control assembly for a breathing mask for an aircraft crew member
CA3184015A CA3184015A1 (en) 2020-07-24 2021-07-21 Regulator assembly for an aircrew breathing mask

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20305856.5A EP3943162B1 (en) 2020-07-24 2020-07-24 Control assembly for a breathing mask for an aircraft crew member

Publications (2)

Publication Number Publication Date
EP3943162A1 EP3943162A1 (en) 2022-01-26
EP3943162B1 true EP3943162B1 (en) 2023-10-25

Family

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Application Number Title Priority Date Filing Date
EP20305856.5A Active EP3943162B1 (en) 2020-07-24 2020-07-24 Control assembly for a breathing mask for an aircraft crew member
EP21749134.9A Active EP4185391B1 (en) 2020-07-24 2021-07-21 Control assembly for a breathing mask for an aircraft crew member

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP21749134.9A Active EP4185391B1 (en) 2020-07-24 2021-07-21 Control assembly for a breathing mask for an aircraft crew member

Country Status (6)

Country Link
US (1) US20230293916A1 (en)
EP (2) EP3943162B1 (en)
CN (1) CN116133723A (en)
BR (1) BR112022026895A2 (en)
CA (1) CA3184015A1 (en)
WO (1) WO2022018169A1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101932363B (en) * 2007-11-21 2012-05-23 联合技术公司 Breathing mask with oxygen reduced consumption
FR3020274B1 (en) * 2014-04-24 2016-04-15 Zodiac Aerotechnics REGULATING ASSEMBLY FOR RESPIRATORY MASK.

Also Published As

Publication number Publication date
CN116133723A (en) 2023-05-16
EP4185391B1 (en) 2024-06-26
US20230293916A1 (en) 2023-09-21
EP3943162A1 (en) 2022-01-26
CA3184015A1 (en) 2022-01-27
BR112022026895A2 (en) 2023-01-31
WO2022018169A1 (en) 2022-01-27
EP4185391A1 (en) 2023-05-31

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