WO2023275452A1

WO2023275452A1 - Individually portable and foldable assisted-ventilation apparatus

Info

Publication number: WO2023275452A1
Application number: PCT/FR2022/051160
Authority: WO
Inventors: Yohan DASSONVILLE; Florent Corlay
Original assignee: Seb S.A.
Priority date: 2021-07-02
Filing date: 2022-06-15
Publication date: 2023-01-05
Also published as: FR3124736B1; EP4363012A1; FR3124736A1

Abstract

The invention relates to an individually portable assisted-ventilation apparatus (1) comprising an air inlet (2), a ventilator and a main body (6) including a primary element (7) comprising an air outlet (4) for blowing a flow (F) of air towards the airways, and a secondary element (8), characterized in that the primary and secondary elements are connected by articulation means (13) permitting the main body to change between a folded configuration and a deployed configuration of the primary and secondary elements, and allowing pivoting of the primary and secondary elements, about a first pivot axis (A-A'), between a folded position and a deployed reference position, and pivoting of the primary and secondary elements, about a second pivot axis (B-B'), beyond the deployed reference position, the pivot axes being remote and separate from one another.

Description

INDIVIDUALLY PORTABLE AND ASSISTED VENTILATION APPARATUS

FOLDABLE

TECHNICAL AREA

The present invention relates to the general technical field of assisted ventilation devices, such as in particular assisted ventilation air filtration devices.

The invention relates more particularly to a device with assisted ventilation, individually portable, comprising at least one air inlet, at least one fan, and a main body including at least one primary element comprising at least one air outlet configured to blow a flow of air generated by the ventilator in the direction of the airways of a user, and at least one secondary element.

PRIOR TECHNIQUE

Assisted ventilation devices are already known, which are designed to deliver a flow of forced air to a user in order to provide him with respiratory aid. These are typically devices comprising a mask provided with an air outlet, which is intended to be held pressed against the face of the user, so as to cover his nose and his mouth, for example at the help of rubber bands passed around the head of the user. The mask is connected to a blower comprising a fan, via a flexible air pipe. Although qualified as “non-invasive”, such a device is relatively obstructive for the user. The user cannot easily transport it with him, set it up and use it easily outside his home or a particular place of care without the help of a third party. These known devices are therefore generally dedicated to stationary use, typically under professional medical supervision. Assisted ventilation air filtration devices are also known. These devices are designed to deliver a forced air flow to a user, from ambient air, which has been filtered beforehand in order to at least partially rid it of certain pollutants. Such devices are more specifically provided to provide respiratory protection for their users, by limiting the inhalation by the latter of respiratory pollutants, fine particles and other substances with potentially deleterious health effects present in the surrounding air. Such powered air filtration units typically include an air inlet, a fan for generating a forced air flow from ambient air taken from the immediate environment, one or more filters for filtering the taken air, and an air outlet through which an air flow forced and filtered can thus be delivered to the user. Such assisted ventilation air filtration devices have recently been introduced to overcome a certain number of drawbacks of passive individual respiratory protection equipment, such as conventional filtering masks, for example integral filtering masks, covering the whole of the face, or half-masks that only cover a lower portion of the user's face, including the nose and mouth. This passive personal respiratory protection equipment is also called “free ventilation”, insofar as the passage of air through the filter is ensured solely due to the respiratory exchanges of the user. Although designed to be worn by their users, and to accompany the latter in the exercise of a professional activity for example, such assisted ventilation air filtration devices nevertheless generally remain cumbersome, impractical to store and to transport, and complex to put in place correctly for a user unaccustomed to their use. This is why these known devices are generally intended for the protection of users in a professional context, for example for the individual protection of workers and technicians, firefighters, soldiers, etc.

Whether or not they provide an air filtration function, the known assisted ventilation devices are often not very ergonomic, not very pleasant to use, so that their use can sometimes prove to be very restrictive. They do not always allow an optimal direction of the air flow towards the respiratory tract of the user. Generally designed to be at least partly attached to the user's head, known devices can interfere with the user's visibility and/or communication with their personal or professional environment. In addition, their use is sometimes incompatible with the simultaneous wearing of glasses, headgear (hat, cap, helmet, etc.), over- or extra-auricular helmets (audio or sound protection), etc., or still using makeup.

DISCLOSURE OF THE INVENTION

The objects assigned to the invention therefore aim to provide an answer to the above-mentioned problems, by proposing in particular a new assisted ventilation device, individually portable by a user, the manipulation of which with a view to its installation and its removal is particularly easy and secure, and which can be easily transported or stored after use.

Another object of the invention aims to provide a new assisted ventilation device which is particularly ergonomic, and whose use is particularly intuitive.

Another object of the invention aims to provide a new assisted ventilation device which contributes to preserving the respiratory health of the user.

Another object of the invention aims to provide a new device with assisted ventilation whose port is particularly pleasant and not very obstructive for the user.

Another object of the invention aims to provide a new assisted ventilation device which is of particularly reliable and robust construction.

Another object of the invention aims to provide a new assisted ventilation device which is of particularly compact construction.

Another object of the invention aims to provide a new assisted ventilation device which can be easily adapted to users of different sizes and builds.

The objects assigned to the invention are achieved using an individually portable assisted ventilation device, comprising at least one air inlet, at least one fan, and a main body including:

- at least one primary element comprising at least one air outlet configured to blow an air flow generated by the ventilator towards the respiratory tract of a user, and

- at least one secondary element, said device being characterized in that the primary and secondary elements are interconnected by means of articulation to allow the main body to move between a relative folded configuration of the primary and secondary elements and a configuration relative deployment of the primary and secondary elements, and vice versa, said articulation means allowing

- a first relative pivoting of the primary and secondary elements, along a first pivot axis, between a folded position and a deployed reference position, and - A second relative pivoting of the primary and secondary elements, along a second pivot axis, beyond said deployed reference position, said first and second pivot axes being distant and distinct from each other. BRIEF DESCRIPTION OF THE DRAWINGS

Other features and advantages of the invention will appear and emerge in more detail on reading the description given below, with reference to the appended figures, given solely by way of illustrative and non-limiting examples, among which:

- Figure 1 illustrates, in a schematic front view, a preferred embodiment of an assisted ventilation device according to the invention, which device is shown worn by a human user. The apparatus constitutes, in this particular embodiment, an air filtration apparatus with assisted ventilation. The main body of the device here forms a substantially annular body portable around the neck of the user. In this embodiment, the main body of the device comprises a single primary element forming a front element, which is connected to two secondary elements forming rear elements;

- Figure 2 illustrates, in a schematic perspective view, the device of Figure 1 worn by a human user around his neck. Air circulation is represented by arrows;

- Figure 3 illustrates, in a schematic top view, the device of Figures 1 and 2, the main body of which is in the folded configuration, each of the secondary elements occupying with the primary element a folded position;

- Figure 4 illustrates, in a schematic top view, the device of Figures 1 to 3, the main body of which is in the deployed configuration, each of the secondary elements occupying with the primary element a reference deployed position;

- Figure 5 illustrates, in a schematic top view, the device of Figures 1 to 4, the main body of which is in the deployed configuration, each of the secondary elements occupying with the primary element a position beyond the deployed position of reference to Figure 3;

- Figure 6 illustrates, in a schematic side view (left), the apparatus of Figure 4; - Figure 7 illustrates, in a schematic perspective view, the apparatus of Figure 6;

- Figure 8 illustrates, in a schematic exploded perspective view, the apparatus of Figures 6 and 7;

- Figure 9 illustrates, in a truncated perspective view, a detail of the design of an elastic hinge of the articulation means of the device of Figures 1 to 8. A cowling element of the secondary internal face of the element pictured secondary has been omitted so as to make the elastic hinge design visible;

- Figure 10 illustrates, according to a truncated cross-sectional view of the main body of the device, the elastic hinge of Figure 9. The primary and secondary elements are here illustrated in the deployed reference position;

- Figure 11 illustrates, according to another truncated cross-sectional view of the main body of the device (carried out at a different altitude from the view of Figure 10), the elastic hinge of Figures 9 and 10. The primary and secondary elements are here illustrated in a position beyond the reference deployed position illustrated in FIG. 10;

- Figure 12 illustrates, in a truncated perspective view, a design variant of the elastic hinge of the hinge means of the device of Figures 1 to 8. A cowling element of the secondary internal face of the secondary element shown has been omitted so as to make visible the design of the elastic hinge;

- Figure 13 illustrates, according to a truncated cross-sectional view of the main body of the device, the elastic hinge of Figure 12. The primary and secondary elements are here illustrated in the deployed reference position;

- Figure 14 illustrates, in a truncated view in perspective, another design variant of the elastic hinge of the articulation means of the device of Figures 1 to 8. A cowling element of the secondary internal face of the element pictured secondary has been omitted so as to make the elastic hinge design visible; - Figure 15 illustrates, in a truncated cross-sectional view of the main body of the device, the elastic hinge of Figure 14. The primary and secondary elements are here illustrated in the deployed reference position;

- Figure 16 illustrates, in a truncated view in perspective, another design variant of the elastic hinge of the articulation means of the apparatus of Figures 1 to 8. A cowling element of the secondary internal face of the element pictured secondary has been omitted so as to make the elastic hinge design visible;

- Figure 17 illustrates, according to a truncated cross-sectional view of the main body of the device, the elastic hinge of Figure 16. The primary and secondary elements are here illustrated in the deployed reference position;

- Figure 18 illustrates, in a schematic side view (right), a device according to the invention substantially identical to that of Figures 1 to 8, but the design of the articulation means is different;

- figure 19 illustrates, according to a truncated schematic view from above, details of the design and operation of the articulation means of the apparatus of figure 18.

WAYS TO REALIZE THE INVENTION

The invention relates to a device 1 with assisted ventilation, individually portable, that is to say portable on the person by a user. It is therefore advantageously active respiratory equipment which is designed and configured to be carried on it by a user, human or animal, and to deliver to this user a flow F of forced air from ambient air. It is preferably a device 1 intended for use in a domestic setting or in the context of the exercise of a professional activity, by a user who lacks specific professional skills in respiratory health. The apparatus 1 according to the invention, of which a preferred non-limiting embodiment is illustrated by way of example in the figures, comprises at least one air inlet 2, at least one fan 3, and at least one air outlet 4 configured to blow a flow F of air generated by the fan 3 in the direction of the airways (nose and/or mouth) of the user. The air inlet 2, the fan 3 and the air outlet 4 are therefore in aeraulic communication, so that the fan 3 in operation draws in surrounding air external to the device 1 via the air inlet 2 in order to blow in the direction of the user's respiratory tract via the air outlet 4. Preferably, the device 1 is designed and configured so that the air outlet 4 is positioned opposite and at a distance from the airways of the user, and preferably facing the face of the user, when the device 1 is worn by the user. Advantageously, as in the embodiment illustrated in the figures, the device 1 has no part or element provided, that is to say specifically designed and configured, to come into contact with the user's face, in particular to guide the flow F of air distributed by the air outlet 4 and/or to ensure airtightness between the air outlet 4 and the user's face. Wearing the device 1 is thus particularly comfortable, not very obstructive, for the user.

According to a preferred variant, as in the embodiment illustrated in the figures, the device 1 more specifically constitutes a device 1 for the treatment of air with assisted ventilation, and more preferably still a device 1 for filtering air with assisted ventilation. In other words, the device 1 is therefore designed and configured to deliver to the user a flow F of treated air, and preferably filtered, purified, and forced from ambient air. As such, the apparatus 1 advantageously comprises an air filtration device 5, typically including one or more air filters, or is at the very least specifically designed and configured to be used in combination with such an air filtration device. air 5. Preferably removable, the air filtration device 5 can then be advantageously arranged inside the device 1, between the air inlet 2 and the air outlet 4, in upstream and/or downstream of the fan 3 in consideration of the direction of air circulation within the device 1. For example, the air filtration device 5 can comprise one or more air filter(s) advantageously arranged between the air inlet 2 and the fan 3, as in the embodiment illustrated in the figures, which also makes it possible to limit the risk of fouling of the fan 3. The role of the filtration device d 5 air is to separate from the surrounding ambient air, and to retain or destroy, one or pl several undesirable substances or particles present in suspension, solid(s) or aerosol(s) in the surrounding ambient air, so that the flow F of forced air delivered by the device 1 to the the user is depleted, preferably significantly, of undesirable substances or particles initially present in the surrounding ambient air. By way of solid particles, mention may be made of dust, smoke, solid atmospheric pollutants. The term "aerosol" refers here preferentially to fine particles, solid or liquid, of a substance or a mixture of substances, suspended in a gaseous medium, and which generally have a negligible fall velocity, less than 0.25 m/s). In ambient air, under normal conditions, this typically corresponds to particles with dimensions less than 100 μm. This definition covers aerosols containing particles of microbial origin (viruses, bacteria, fungi, etc.), animal or plant origin (pollens, allergens, etc.), also called bioaerosols. The air filtration device 5 is designed and configured, typically in terms of choice of filter(s), depending on the level of filtration performance sought for one or more substances to be filtered. Preferably, the air filtration device 5 of the device 1 is designed and configured to retain aerosols. As such, it advantageously comprises one or more air filter(s), in particular one or more class P1 and/or class P2 filter(s), as defined in particular in the French standards NF EN 143:2000 and NF EN 143/A1:2006, and which stop at least 80% of aerosols (class P1) or at least 94% of aerosols (class P2). Preferably, they are HEPA filter(s) (ie so-called “High Efficiency Airborne Particle” filter(s)). The name HEPA applies to any device capable of filtering, in one pass, at least 99.97% of particles with a diameter greater than or equal to 0.3 μm. The air filtration device 5 can comprise several identical or different filters, such as for example an activated carbon filter arranged upstream of a HEPA filter, or even two HEPA filters arranged one behind the other. Still other filters can be envisaged, depending on the nature of the particles or substances to be filtered, and according to the level of corresponding filtration performance expected, such as for example filters based on polytetrafluoroethylene (PTFE) or ceramic. Optionally, the apparatus 1 may comprise a particle sensor and a device for controlling the rotational speed of the fan 3, connected to said particle and/or volatile organic compound(s) sensor, to adapt the speed of rotation of the fan 3 (and therefore the flow rate of the air flow F generated) according to the content of particles and/or of volatile organic compound(s) in the air to be filtered .

According to this preferred variant, the device 1 thus advantageously constitutes respiratory protection equipment with assisted ventilation, the use of which contributes to protecting the health and quality of life of the user, in particular in a context of pollution. atmospheric or microbial pandemic / epidemic. The generation of a forced air flow F by the device 1 also offers the advantage of compensating for a loss of air pressure that the filtration device could generate. of air 5. Thus, the user of the device 1 is not obliged to force his breathing to overcome such a loss of pressure on his own, which therefore saves him additional effort and fatigue, at the difference from what can be observed (or at the very least felt) when wearing a so-called “free ventilation” air filtration device, such as conventional protective masks or half-masks.

According to another variant (not illustrated), the device could, on the contrary, be devoid of any air treatment device, and in particular of air filtration, as described above. In this case, the device would therefore not be designed to filter, treat, the ambient air before it is delivered to the user in the form of a forced air flow. The device would nevertheless have the advantage of allowing the user a reduced respiratory effort, by facilitating the circulation of air in the bronchi and lungs of the user. In this sense, the use of the device according to this second variant would contribute to protecting, or even improving, the state of health and the quality of life of the user, in particular when the latter is suffering from a dysfunction of the respiratory system (poor functioning of the lungs, weakness of the respiratory muscles, etc.).

The device 1 according to the invention comprises at least one main body 6, which includes on the one hand at least one primary element 7 comprising said air outlet 4, and on the other hand at least one secondary element 8, which is advantageously designed and configured to hold the main body 6 of the device 1 in place relative to the body of the user. Connected to the primary element 7, the secondary element 8 is therefore advantageously intended to ensure, or at the very least to contribute to ensuring, that the main body 6 is held in place with respect to the user's body. Preferably, the primary 7 and secondary 8 elements of the main body 6 are both substantially rigid, that is to say devoid of their own flexibility. Advantageously, the primary element 7 has a primary outer face 9, which is oriented towards the outside of the main body 6 and which defines a visible outer surface portion of the main body 6, and an opposite primary inner face 10 . Oriented towards the inside of the main body 6, and therefore opposite the body of the user in use of the device 1, said primary internal face 10 advantageously defines a visible internal surface portion of the main body 6. Conversely, the secondary element 8 has a secondary outer face 11, which is oriented towards the outside of the main body 6 and which advantageously defines another visible outer surface portion of the main body 6, and a secondary inner face 12 opposite. Oriented towards the interior of the main body 6, and therefore facing the body of the user in use of the device 1, said secondary internal face 12 Advantageously defines another visible internal surface portion of the main body 6.

Said primary 7 and secondary 8 elements are interconnected by means of articulation 13, 13', which are designed and configured to allow the main body 6 to move between a relative folded configuration of the primary 1 and secondary 8 elements and a relative deployed configuration of the primary 1 and secondary 8 elements, and vice versa. The main body 6 therefore comprises said articulation means 13, 13'. The main body 6 is therefore articulated so that the user can pass it, preferably manually:

- of a first configuration (called folded configuration), in which the primary 7 and secondary 8 elements of the main body 6 are folded with respect to each other, and typically towards each other, said internal faces primary 10 and secondary 12 then being advantageously arranged opposite one another (FIG. 3),

- a second configuration (known as the deployed configuration) in which the primary 7 and secondary 8 elements of the main body 6 are unfolded relative to each other, said primary 10 and secondary 12 internal faces then being advantageously arranged further apart one from the other than in the folded configuration (FIGS. 4 and 5).

Thus, the deployed configuration of the main body 6 advantageously corresponds to a configuration of use of the device 1, in which the latter is able to be set up, carried and put into operation by the user, and in which the main body 6 occupies a given bulk volume. The folded configuration of the main body 6 advantageously corresponds to a storage configuration, in which the main body 6 occupies a smaller bulk volume. Thanks to the implementation of such articulation means 13, 13', the device 1 according to the invention is thus easy to put in place with a view to its use, then to remove, and its size can be significantly reduced. for storage after use. The device 1 according to the invention can thus advantageously constitute a "nomadic" device, which can easily accompany its user in his daily life and his movements, and be stored easily in a limited space, such as for example in a pocket, a bag handbag or a little backpack. Advantageously, as in the embodiment illustrated in the figures, the main body 6 of the device 1 is designed and configured to be put in place and worn by the user around his neck (FIGS. 1 and 2). As illustrated by example in the figures, said at least one secondary element 8 is therefore advantageously designed and configured to hold the main body 6 of the device 1 in place relative to the body of the user, and advantageously in particular to sufficiently surround the user's neck in order to maintain the main body 6 around the user's neck. The main body 6 of the device 1 being initially in the folded configuration, the user can then manually switch it to the unfolded configuration by exerting a force on the primary 7 and secondary 8 elements to separate them from each other. (Deployed configuration), before arranging the main body 6 of the device 1 around his neck. Preferably, in said relative deployed configuration of the primary 7 and secondary 8 elements, the main body 6 forms a substantially annular body, or at least partially annular, portable around the neck of the user, as in the embodiment illustrated in the figures. . The main body 6 of the device 1 therefore has a shape and a mass advantageously adapted to be worn by a human user (or alternatively an animal), around his neck. Here, the term "annular" advantageously means the fact that the main body 6 has, in the deployed configuration, a ring shape, substantially oval or circular, or even rectangular. The term "partially annular" advantageously means a shape open up to a quarter turn of the ring, which, if it were continuous, would then be annular. Such an at least partially annular shape of the main body 6 of the device 1 contributes to excellent ergonomics and great comfort of use of the device 1. In particular, the shape (at least partially annular) of the main body 6 of the device 1 facilitates not only the installation, but also the wearing of the main body 6 by the user, around his neck, the main body 6 possibly resting at least partly on the shoulders of the user, once set up. Wearing the device 1 is particularly comfortable for the user, whose hands can advantageously remain free, the main body 6 of the device 1 advantageously accompanying the movements of the body, and in particular of the head, of the user without bothering or hampering them particularly. As illustrated by example in the figures, the respective primary 10 and secondary 12 internal faces of the primary 7 and secondary 8 elements have a preferentially curved, concave profile, with a concavity oriented towards a free space 14 defined at the center of the main body 6 when the latter is in deployed configuration. In use of the device 1, the free space 14 is at least partially occupied by the user's neck, the internal surface of the main body 6 then being oriented facing the user's neck. Advantageously, the main body 6 is dimensioned so that its internal surface is not in immediate close contact with the neck of the user, when the latter is equipped with the device 1, but on the contrary there is a certain play between the skin of the user's neck and said internal surface, at least on a part of the periphery of the free space 14 in the center of the main body 6 of the device 1 (FIG. 2). The wearing comfort of the appliance 1 is thus further improved, by reducing the risk of feeling of strangulation for the user. This also advantageously allows the user to wear the device 1 in combination with a scarf wrapped around his neck, in winter for example.

In accordance with the invention, said articulation means 13, 13', which the main body 6 of the device 1 comprises, are more specifically designed and configured so that they allow:

- a first relative pivoting R1 of the primary 7 and secondary 8 elements, along a first pivoting axis A-A', between a folded position (FIG. 3) and a reference deployed position (FIG. 4) (i.e. say, in particular, from a folded position to a reference deployed position), and

- a second relative pivoting R2 of the primary 7 and secondary 8 elements, along a second pivot axis B-B', beyond said deployed reference position (FIG. 5), said first and second pivot axes A-A' , B-B' being distant and distinct from each other.

Said second relative pivoting R2 advantageously corresponds to a relative pivoting of the primary 7 and secondary 8 elements, along the second pivot axis B-B', in a direction of rotation identical to the direction of rotation of the first relative pivoting R1 along the first axis of pivoting A-A'. Said folded position is a relative position occupied by the primary 7 and secondary 8 elements when the main body 6 is in the folded configuration (FIG. 3). Conversely, said deployed reference position, and the relative position(s) beyond the deployed reference position, are positions corresponding to the deployed configuration of the main body 6 (FIGS. 4 and 5). Advantageously, the deployed reference position corresponding to a relative position of the primary 7 and secondary 8 elements when the main body 6 is in place, carried by the user. Preferably, said position deployed reference is a stable position (or intermediate stop position), beyond which the primary 7 and secondary 8 elements cannot pivot relative to each other in the absence of any particular force exerted on the 'against the primary 7 and secondary 8 elements. Said articulation means 13, 13' thus define a "double pivot link" kinematics for the primary 7 and secondary 8 elements of the main body 6 of the device 1. Thus, the main body 6 of the device 1 being initially in the folded configuration, the primary 7 and secondary 8 elements occupying their relative folded position (FIG. 3), the user who wishes to equip himself with the device 1 can manually grasp the body main 6 of the device 1 and exert, against the primary 7 and secondary 8 elements, an effort in order to make them pivot relative to each other (first relative pivoting R1) so as to bring them into their deployed position reference (Figure 4). If the user then encounters difficulty in positioning on his body, and preferably around his neck, the main body 6 of the device 1, the user can then exercise against the primary 7 and secondary 8 elements a additional effort in order to make them pivot further relative to each other (second relative pivoting R2) so as to bring them, from their deployed reference position to a position beyond said deployed reference position, i.e. that is, to further separate the respective primary 10 and secondary 12 inner faces of the primary 7 and secondary 8 elements (FIG. 5).

The possibility of thus separating the primary 7 and secondary 8 elements beyond their deployed reference position therefore makes it possible to greatly facilitate the installation of the device 1, while limiting the risk of damage to the element. secondary 8 under the force exerted by the user, in particular when the secondary element 8 is rigid, devoid of its own flexibility. However, if the articulation means were designed to allow only a single pivot connection of the primary 7 and secondary 8 elements, such a possibility of additional spacing would generate a very significant risk of the user's fingers being pinched in the articulation means during the passage of the primary 7 and secondary 8 elements from their deployed reference position to a position beyond the latter. The implementation, in accordance with the invention, of articulation means 13, 13' with a "double pivot connection" makes it possible to greatly limit such a risk of pinching, and therefore further confers on the apparatus 1 according to the invention a particularly safe character of use, avoiding the definition of a problematic pinching space at the level of the articulation means 13. Thanks to such articulation means 13, 13', the handling of the device 1 according to the invention, with a view to its installation and its removal, is particularly easy and safe for the user. The implementation of such articulation means 13, 13' gives the device 1 a particularly ergonomic character, as well as great reliability and great robustness in use. Furthermore, such articulation means 13, 13' with "double pivot connection" advantageously allow a particular compact and aesthetic design of the device 1, avoiding the creation of a zone of geometric discontinuity in the outer surface of the body. main 6 which would otherwise be necessary to allow mono-axial relative pivoting (in the case of a single pivot connection) of the primary 7 and secondary 8 elements beyond their deployed reference position.

Advantageously, as illustrated by example in the figures, the second pivot axis B-B 'is offset towards the outside of the main body 6, and therefore towards the outside of the device 1, with respect to the first pivot axis A- HAS'. This makes it possible in particular to facilitate the design of the articulation means 13, 13', to improve the compactness of the device 1, but also to easily define a wide range of relative deployment of the primary 7 and secondary 8 elements, which further facilitates the installation of the device 1 by the user. Even more advantageously, as illustrated by example in FIGS. 5 and 19 in particular, the second pivot axis B-B' is positioned on, along, an edge 15, 15' of an external surface of the apparatus 1, and in particular of the main body 6 of the latter, that is to say an edge 15, 15' of a surface of the device 1 which is oriented towards the outside of the main body 6. Conversely, the first pivot axis A-A 'is advantageously positioned in the vicinity of a surface of the apparatus 1, and in particular of the main body 6 of the latter, which is oriented towards the interior of the main body 6. For example, as illustrated in FIG. 5 in particular, the second pivot axis B-B' is positioned on, along an edge 15 of the primary outer face 9 of the primary element 7. Thus, when the primary 7 and secondary 8 elements pivot relative to each other to move from the deployed reference position to a relative position beyond the latter (from second relative pivoting R2), the primary 7 and secondary 8 elements are in contact with one another along said edge 15, 15'. This advantageously makes it possible to further limit the risk of the user pinching when handling the device 1, and also advantageously allows a particularly aesthetic design of the device 1 by avoiding the generation of a geometric discontinuity of the external profile of the main body 6 of the latter.

Preferably, the articulation means 13, 13' are designed and configured so that the first pivot axis A-A' is substantially orthogonal to a transverse median plane P1 of extension of the main body 6 of the device 1 ( figures 3 and 6 in particular). Preferably, the articulation means 13 are designed and configured so that the first and second pivot axes A-A', B-B' are parallel to each other (FIGS. 5 and 6 in particular). The implementation of such additional characteristics, preferably taken in combination as in the embodiment illustrated in the figures, advantageously contributes to the definition of a particularly simple and intuitive kinematics for the user. The device 1 is thus particularly simple and intuitive to set up, then to remove, by the user. In addition, this facilitates the general design of the device 1 , and contributes to its robustness in use.

Preferably, in order to further improve the ease of installation of the device 1, the articulation means 13, 13' are designed and configured to allow relative pivoting of the primary 7 and secondary 8 elements according to an angle Q1 advantageously between 50° and 170° around the first axis of pivoting A-A' (first relative pivoting R1, FIG. 3) and according to an angle Q2 advantageously between 5° and 50°, and preferably equal to 30°, around the second pivot axis B-B' (second relative pivot R2, FIG. 5).

According to a variant, implemented in the embodiment illustrated in the figures, the articulation means 13, 13' also constitute means for permanently fixing the secondary element 8 to the primary element 7. Once connected between them via the articulation means 13, 13', the primary 7 and secondary 8 elements cannot thus be separated, detached, by the user in normal use of the device 1 . According to an alternative variant, the articulation means could, on the contrary, constitute reversible, removable fastening means of the secondary element 8 to the primary element 7. In this way, the user could separate and reassemble as he pleases the secondary element 8 to the primary element 7, for example to replace the secondary element 8 with another compatible secondary element. Advantageously, the articulation means 13, 13' comprise abutment means for defining, beyond said deployed reference position, a maximum deployed position. So the second relative pivoting corresponds to relative pivoting of the primary 7 and secondary 8 elements, along the second pivot axis B-B', between said reference extended position and said maximum extended position.

As in the embodiment illustrated in the figures, the articulation means 13, 13' preferably comprise an elastic hinge 16, 16' which allows, which ensures, the first relative pivoting R1 of the primary 7 and secondary 8 elements and the second relative pivoting R2 of the primary 7 and secondary 8 elements. The elastic hinge 16 comprises an elastic return member 17, 17' to automatically return the primary 7 and secondary 8 elements to said deployed reference position when the primary 7 and secondary 8 elements are in a position beyond said reference deployed position. Thus, the return of the primary 7 and secondary 8 elements to their deployed reference position, from a position beyond the latter, is advantageously done automatically, under the effect of the elastic return member which therefore forces the primary 7 and secondary 8 elements to pivot in the opposite direction along the second pivot axis B-B', once the user ceases to exert against the primary 7 and secondary 8 elements a force tending to maintain them in a position beyond their reference deployed position. While the deployed reference position is an advantageously stable relative position of the primary 7 and secondary 8 elements, any position beyond the deployed reference position is therefore an advantageously unstable relative position of the primary 7 and secondary 8 elements. simpler, faster and even more intuitive positioning of the device 1 on the body of the user. In the case where the user also wears a garment or a clothing accessory of significant thickness between his skin and the main body 6 of the device 1, for example a scarf, the implementation of such an elastic hinge allows despite everything comfortable wearing of the device 6, the elastic return member automatically adapting the relative position of the primary 7 and secondary 8 elements beyond their deployed reference position if necessary, while ensuring effective maintenance of the main body 6 of the device 1 to the body of the user. In addition, the implementation of such an elastic hinge ensures reliable maintenance of the main body 6 of the device 1 to the user's body while guaranteeing the user's safety in the event of an effort to tearing exerted by the user himself or by an external agent or object (third person, etc.) on the main body 6 of the device 1 . The elastic return member 17 of said elastic hinge 16 may advantageously advantageously comprise at least one of: a helical traction spring 17A, a helical torsion spring 17B, a flat spiral spring 17C working in traction, and a spring 17D helical compression. Alternatively again, the elastic return member 17 could comprise a bistable leaf spring. The implementation of a helical traction spring 17A, and preferably of a single helical traction spring 17A, as in the example illustrated in FIGS. 9 to 11 in particular, has the advantage of allowing a relatively simple design and inexpensive elastic hinge 16. Nevertheless, the assembly of such a helical tension spring 17A can prove to be complex. In addition, the return force exerted by such a helical traction spring 17A in situation may lack linearity, so that the kinematics of the elastic hinge 16 may prove to be disturbing in certain cases for the user. The implementation of a helical torsion spring 17B, and preferably of at least two separate helical torsion spring 17B, preferably of identical stiffness and aligned along their central axis, as in the example illustrated in Figures 12 and 13 , is particularly advantageous. Indeed, it allows a relatively simple and compact design, and easy assembly of the elastic hinge 16. It also makes it possible to obtain a particularly constant and well-controlled return force. In addition, it advantageously makes it possible to obtain a particularly limited radial play (in consideration of the first and second pivot axes A-A', B-B'), which promotes great robustness and great reliability of operation of the means of articulation 13. The implementation of a flat spiral spring 17C working in traction, as in the example illustrated in Figures 14 and 15, is also advantageous both in terms of simplicity of design and assembly of the elastic hinge 16 as control of the linearity of the return force exerted in situation. The implementation of a 17D helical compression spring, and preferably a single 17D helical compression spring, as in the example illustrated in Figures 16 and 17, also proves to be advantageous in terms of controlling the linearity of the restoring force exerted in situation.

Preferably, the elastic hinge 16 comprises, as in the embodiment illustrated in the figures, an intermediate connecting piece 18, which is connected to the primary element 7 by a pivot connection on the one hand, and which is connected to the secondary element 8 sliding along a curvilinear path on the other hand, the elastic return member 17 connecting between them the intermediate connecting piece 18 and the secondary element 8. Thus, the design and the kinematic operation of the articulation means 13 are particularly simple, reliable and robust, and the articulation means 13 ensure optimal guidance of the relative movement of the primary 7 and secondary 8 elements. Advantageously, the pivot axis of said pivot link defines the first pivot axis A-A' of the articulation means 13. Advantageously, the intermediate link part 18 is shaped and configured in such a way that the radius of curvature of said curvilinear trajectory defines a center of curvature which is arranged on the second pivot axis A-A' of the articulation means 13. Said curvilinear trajectory is preferably a circular arc trajectory.

In this way, the first relative pivoting R1 of the primary 7 and secondary 8 elements along said first pivot axis A-A', from said folded position to said deployed reference position, is advantageously ensured by pivoting of the intermediate connecting piece 18 with respect to the primary element 7 according to said pivot connection, when the user exerts a distancing force to move the primary 10 and secondary 12 internal faces away from each other and thus cause the main body 6 to pass from the device 1 from its folded configuration to its deployed configuration. In doing so, the intermediate connecting piece 18 advantageously remains immobile relative to the secondary element 8 under the effect of the elastic return member 17. Once the deployed reference position has been reached (FIG. 4), the secondary element 8 is then advantageously positioned in abutment against the primary element 7 at at least one point of contact (and preferably along a line of contact corresponding to an edge 15 of the primary outer face 9 of the primary element 7) located along the second pivot axis B-B' (immaterial pivot axis). The exercise by the user of a separation force tending to cause the primary 7 and secondary 8 elements to occupy a relative position beyond the deployed reference position (FIG. 5), then causes the second relative pivoting R2 primary 7 and secondary 8 elements, along said second pivot axis B-B' and in a direction of rotation advantageously identical to the direction of rotation of the first relative pivot R1 along the first pivot axis A-A'. In doing so, the secondary element 8 then slides relative to the intermediate connecting piece 18 along said curvilinear path, the intermediate connecting piece 18 advantageously remaining immobile relative to the primary element 7, and the secondary element 8 advantageously remaining positioned in abutment against the primary element 7 in said (at the least one) contact point (Figure 11). The relative return of the primary 7 and secondary 8 elements, from the position beyond the deployed reference position to said deployed reference position, then from the latter to the folded position, is then advantageously carried out according to an inverse kinematics, by a relative pivoting in the opposite direction along the second pivot axis B-B', followed by relative pivoting in the opposite direction along the first pivot axis A-A'.

Figures 9 to 11 illustrate, for example, a variant in which the elastic return member 17 of the elastic hinge 16 of the device 1 of Figures 1 to 7 comprises a helical traction spring 17A. In this example, the intermediate connecting part 18 forms a monolithic rigid part defining a knuckle 19, which is arranged in a corresponding housing provided in the primary element 7. The elastic hinge 16 comprises a hinge 20 (or pivot rod, for example formed by a pin), which is engaged through the primary element 7 and the knuckle 19, and thus defines the axis of the pivot connection by which the intermediate connecting piece 18 is thus connected to the primary element 7. The axis of the pivot connection then advantageously defines the first pivot axis A-A'. A first end 21 of the helical traction spring 17A is pivotally secured to the intermediate connecting piece 18, along a pivot axis advantageously parallel to the first pivot axis A-A'. A second opposite end 22 of the helical tension spring 17A is pivotally secured to the secondary element 8, along a pivot axis advantageously parallel to the second pivot axis B-B' (which here is advantageously parallel to the first pivot axis A-A '). In order to further connect the intermediate connecting piece 18 to the secondary element 8, sliding along a curvilinear trajectory, the intermediate connecting piece 18 further defines a pair of curved arms 23 (or possibly a single curved arm), arranged sliding in a housing 23A of conjugate curved shape, the arcuate curvature of which is advantageously chosen so as to define a center of curvature positioned on the second pivot axis B-B' (immaterial) when the primary 7 and secondary 8 elements are interconnected by the articulation means 13. A free end of the arms 23 is here advantageously provided with a protrusion 24, designed and configured to come into contact against a corresponding abutment surface 25 of the secondary element 8 to define a maximum relative sliding stroke, and thus form abutment means which define a maximum deployed pivot position along the second pivot axis B-B' (FIG. 11).

Figures 12 and 13 illustrate, as an example, another variant in which the elastic return member 17 of the elastic hinge 16 of the device 1 comprises at least one helical torsion spring 17B, and preferably at least two springs 17B distinct torsion helicals. As in the variant above (same references used in the figures), the intermediate connecting part 18 forms a monolithic rigid part defining a knuckle 19, which is arranged in a corresponding housing provided in the primary element 7. The elastic hinge 16 comprises a hinge 20 (or pivot rod, for example formed by a pin), which is engaged through the primary element 7 and the knuckle 19, and thus defines the axis of the pivot connection by which the intermediate connecting piece 18 is thus connected to the primary element 7. The axis of the pivot connection then advantageously defines the first pivot axis A-A'. The helical torsion springs 17B are arranged within a support 26 of spring(s) with which is provided (or which is fixed to) the secondary element 8. The helical torsion springs 17B are here of identical stiffness and aligned according to their central axis, which thus forms a single central axis which is advantageously parallel to the second pivot axis B-B' (which is here advantageously parallel to the first pivot axis A-A'). In order to connect the intermediate connecting piece 18 to the secondary element 8, sliding along a curvilinear trajectory, the intermediate connecting piece 18 defines a pair of curved arms 23 (or possibly a single curved arm), arranged to slide in a housing of conjugate curved shape, the arcuate curvature of which is chosen so as to define a center of curvature positioned on the second pivot axis B-B' (immaterial) when the primary 7 and secondary 8 elements are interconnected by the means hinge 13. A first leg 27 of the helical torsion springs is fixedly connected to the secondary element 8 by being arranged in a housing provided in the support 26 of the spring(s). A second leg 28 of the helical torsion springs 17B is respectively connected to the intermediate connecting part 18, pressed in elastic support against a surface of a slot 29 formed through the thickness of each of the arms 23. A free end 30 of the second leg 28 of the helical torsion springs 17B here advantageously protrudes from a lateral surface of each of the arms 23 in order to be able to come into contact against a corresponding abutment surface 25 of the secondary element 8, defining a stroke of maximum relative sliding, and thus forming abutment means which define a maximum deployed pivot position along the second pivot axis B-B'.

Figures 14 and 15 illustrate, for example, another variant in which the elastic return member 17 of the elastic hinge 16 of the device 1 comprises a flat spiral spring 17C working in traction. In this example, the intermediate connecting piece 18 is advantageously identical to the intermediate connecting piece 18 of the variant “with helical traction spring 17A” described previously, and it is connected to the primary element 7 pivoting and to the secondary element 8 sliding in the same way (same references used in the figures). A first end 31 of the flat spiral spring 17C, forming a free end of a flat and rectilinear portion of the flat spiral spring 17C, is pivotally secured to the intermediate connecting piece 18, along a pivot axis advantageously parallel to the first pivot axis A-A'. A second opposite end 32 of the flat spiral spring 17C, forming a free end of a spirally wound portion of the flat spiral spring 17C extending the plane and rectilinear portion of the latter, is secured immovably to the secondary element 8 (via a cowling element of the secondary inner face 12 of the secondary element 8 not shown in Figure 14, but visible in Figure 15). As for the variant of Figures 9 to 11, a free end of the arms 23 is here advantageously provided with a protrusion 24, designed and configured to come into contact against a corresponding abutment surface 25 of the secondary element 8 to define a race of maximum relative sliding, and thus form abutment means which define a maximum deployed pivot position along the second pivot axis B-B' (as in FIG. 11).

Figures 16 and 17 illustrate, for example, another variant in which the elastic return member 17 of the elastic hinge 16 of the device 1 comprises a helical compression spring 17D. In this example, the intermediate connecting piece 18 is advantageously identical to the intermediate connecting piece 18 of the variant “with helical traction spring 17A” described previously, and it is connected to the primary element 7 pivoting on the one hand and to the secondary sliding element 8 on the other hand in an identical manner (same references used in the figures). The elastic hinge 16 comprises a rod 33, a first end 34 of which is pivotally secured to the intermediate connecting piece 18, along a pivot axis advantageously parallel to the first pivot axis A-A′, and of which a second opposite end is free and is provided with an axial stop 35 (for example formed by a pin which extends radially). The helical compression spring 17D is mounted coaxially around the rod 33, a first end 36 of the helical compression spring 17D resting against a bearing surface 38 defined by the secondary element 8 (FIG. 16), a second end 37 opposite the helical compression spring 17D bearing against the axial stop 35. As for the variant of Figures 9 to 11, a free end of the arms 23 is here advantageously provided with a protrusion 24, designed and configured to come against a corresponding abutment surface 25 of the secondary element 8 to define a maximum relative sliding stroke, and thus form abutment means which define a maximum deployed pivoting position along the second pivoting axis B-B' (as in FIG. 11).

Obviously, other suitable designs of the articulation means 13, 13' and in particular of the elastic hinge 16 than those described above could possibly be envisaged to ensure such a "double pivot" articulation of the primary elements 7 and secondary 8, it being understood however that the implementation of articulation means 13 comprising an elastic hinge 16 as described above proves to be more particularly advantageous.

For example, according to a variant illustrated in Figures 18 and 19, the articulation means 13' could comprise an elastic hinge 16' comprising an intermediate connecting piece 18' which is connected

- on the one hand to the primary element 7 by a first pivot connection 39, along a pivot axis which advantageously defines the first pivot axis A-A' (material), for example using a first hinge simple (knuckle/housing/hinge system), and

- on the other hand to the secondary element 8 by a second pivot connection 40, along a pivot axis which advantageously defines the second pivot axis B-B' (material), for example using a second simple hinge ( knuckle / housing / hinge system), the elastic return member 17 ', such as for example a tension spring, connecting between them the intermediate connecting piece 18 'and the secondary element 8. As illustrated schematically in example in Figure 19, the intermediate connecting piece 18 'can then advantageously have first and second connecting surfaces 41, 42 opposite, each having a curved shape intended to come into contact against (or at the very least facing) a contact surface 43, 44 respective conjugate curve of the primary 7 and secondary 8 elements, by complementarity of the concave/convex type. When the primary 7 and secondary 8 elements are in the folded position and move towards the deployed reference position, the intermediate connecting piece 18' and the secondary element 8 together form a single kinematic assembly which pivots (first relative pivoting R1) according to the first pivot connection (first pivot axis A-A'), the second connection surface 42 of the intermediate connection part 18' being held in contact against (or at the very least facing) a curved contact surface 44 conjugate of the secondary element 8 under the return effect of the elastic return member 17' (FIG. 19(a)). When the primary 7 and secondary 8 elements occupy the deployed reference position (FIG. 19(b)), the second connecting surface 42 of the intermediate connecting piece 18' is in contact against (or at the very least facing) the conjugate curved contact surface 44 of the secondary element 8, while the first connecting surface 41 of the intermediate connecting piece 18' is in contact against (or at the very least facing) a curved contact surface 43 conjugate of the primary element 7. Then, when the primary 7 and secondary 8 elements are in the deployed reference position and move towards a position beyond the latter (FIG. 19(c)), the intermediate connecting piece 18' and the primary element 7 together in turn form a second single kinematic assembly which pivots (second relative pivot R2) along the second pivot connection (second pivot axis B-B') countering the return force of the member 17' elastic return line, the first re connecting surface 41 of the intermediate connecting piece 18 'being held in contact against (or at the very least facing) the curved contact surface 43 conjugate of the primary element 7. In return, the return member elastic 17' then exerts a return force to bring the primary 7 and secondary 8 elements back to the deployed reference position. The relative return of the primary 7 and secondary 8 elements, from the position beyond the deployed reference position towards said deployed reference position, then from the latter towards the folded position, is then advantageously carried out according to an inverse kinematics. According to this variant, the intermediate connecting piece 18' may also have an intermediate external face 45 which defines, with said primary external faces 9 and secondary 11, the outer surface of the main body 6, and an opposite intermediate inner face which defines, with said primary 10 and secondary 12 inner faces, the inner surface of the main body 6. As illustrated by example in Figures 18 and 19, the second pivot axis B-B' is positioned on, along, an edge 15' of the intermediate outer face 45 of the intermediate connecting piece 18' (and therefore on an edge 15' of the outer surface of the device 1).

According to yet another variant, the articulation means 13, 13' could comprise a hinge comprising an intermediate connecting piece 18, 18' according to one or the other of the variants as described above, without however comprising elastic return member 17, 1 T. Such articulation means would thus advantageously present the aforementioned advantages in terms of simplicity, reliability and robustness, as well as in terms of optimal guidance of the relative movement of the primary 7 and secondary elements 8. However, the hinge of the articulation means would not be a so-called elastic hinge, and the articulation means would not ensure an automatic relative return of the primary 7 and secondary 8 elements to their deployed reference position, so that the establishment of the device 1 would therefore require additional action on the part of the user.

Advantageously, the apparatus 1 may comprise an elastic stop device which opposes the passage of the main body 6 of the apparatus 1, from said relative folded configuration of the primary 7 and secondary 8 elements towards said relative deployed configuration of the elements primary 7 and secondary 8, and vice versa, below a predetermined threshold force exerted against the primary 7 and secondary 8 elements. , along the first pivot axis A-A', of the primary 7 and secondary 8 elements towards the deployed reference position when they are in the folded position, and vice versa towards the folded position when they are in the deployed reference position and device 1 is not yet set up on the user. This makes it possible, on the one hand, to ensure maintenance of the main body 6 of the device 1 in the folded configuration and to avoid a risk of damage to the latter during its transport or storage. This makes it possible, on the other hand, to facilitate the installation of the device 1 by preventing the primary 7 and secondary 8 elements from returning unexpectedly to the folded position when the user has positioned them in the reference deployed position in order to put in place the main body 6 of the device 1 on its body, and preferably around his neck. For example, the elastic abutment device may comprise protrusions respectively carried by the primary element 7 and by the secondary element 8, which protrusions come into abutment contact against each other when the primary elements 7 and secondary 8 from the folded position to the deployed reference position, and vice versa, to limit (if not to prohibit) the continuation of the relative pivoting of the primary 7 and secondary 8 elements. Said protrusions would then be provided to deform elastically one and / or the other, in order to allow the continuation of the relative pivoting of the primary 7 and secondary 8 elements, as soon as a sufficient relative pivoting force, greater than a predetermined threshold force, is exerted against the latter by the user. Alternatively, as in the embodiment illustrated in the figures, the elastic abutment device may comprise at least one protuberance 46, substantially non-elastically deformable, carried by the primary element 7 on its primary internal face 10 in the vicinity of the hinge means 13, 13'. This protuberance 46 is designed to come into abutment contact against a portion of the secondary internal face 12 of the secondary element 8 when the primary 7 and secondary 8 elements pass from the folded position to the deployed reference position, and vice versa. The escape of this abutment contact is here advantageously authorized by a deformation of the elastic return member 17, 17' of the elastic hinge 16, 16' of the articulation means 13, 13', when the user exerts against the primary 7 and secondary 8 elements a relative pivoting force greater than said predetermined threshold force.

Preferably, the main body 6 of the device 1 comprises said air inlet 2 and said fan 3. In other words, the air inlet 2 and the fan 3 of the device 1 are therefore preferably integrated to the main body 6, or at least directly carried by the latter. The air inlet 2 and the fan 3 are therefore not remote from the main body 6, for example within a dedicated box which would be provided to be worn on the belt by the user and which would be connected to the body main via an air flow supply pipe F. The compactness and portability of the device 1 are thus further improved. Even more preferably, as in the embodiment illustrated in the figures, the primary element 7 of the main body 6 of the device 1 comprises said air inlet 2 and said fan 3. Thus, the primary element 7 comprises advantageously all the elements necessary for the aeraulic operation of the device 1 . The implementation of such preferential characteristics contributes in particular to facilitate both the design and manufacture of the device 1, in particular from an aeraulic point of view, and its use. It also follows that the device 1 is thus particularly compact and robust. Preferably, the air inlet 2 is arranged at an altitude lower than a respective altitude of the air outlet 4. This arrangement makes it possible to limit the air pressure losses of the device 1 and thus limit the power required of the motor of the fan 3 and therefore to limit the nuisances, sound in particular, linked to the wearing of a motor close to the head of the user. In addition, the use of a lower power motor makes it possible to limit the energy consumption of the device 1 and therefore to increase the autonomy. For its part, the air outlet 4 is preferably arranged and configured so as to blow the forced air flow F generated by the fan 3 in an upward or horizontal mean direction, in the direction of the user's respiratory tract. In some cases, however, it can be envisaged on the contrary an orientation of the flow F of forced air in whole or in part according to a downward mean direction in the direction of the respiratory tract of the user.

Preferably, the primary element 7 of the main body 6 of the device 1 is unique, and thus forms a single and same coherent structural subassembly of the device 1, which in particular makes it possible to simplify the design, the manufacture and the use of the device 1. The primary element 7 of the main body 6 of the device 1 preferably forms a front element of the main body 6, and therefore an element which advantageously constitutes a front part of the main body 6 of the device 1, which is intended to be positioned essentially in front of the user (in consideration of a frontal plane of the latter), and in particular advantageously in front of the head (and therefore the neck) of the user , in normal use of the device 1 (FIGS. 1 and 2). In return, the secondary element 8 of the main body 6 of the device 1 preferably forms a rear element of the main body 6. It is therefore understood that, as illustrated by example in Figures 1 and 2, said at least one secondary element 8 advantageously constitutes a rear part of the main body 6 of the device 1 which is intended to extend towards the rear of the user's body, and in particular advantageously towards the rear of the head (and therefore of the neck) of the user, in normal use of the device 1. The establishment of the device 1 on the body of the user is thus facilitated, since it does not require a precise adjustment of the main body 6 of device 1, but only involves checking that the front element is correctly positioned in front of the user's head, and that the element back is well positioned at the back (or at the very least towards the back) of the head (and therefore the neck) of the user.

Advantageously, as in the embodiment illustrated in the figures, the main body 6 of the device 1 comprises two separate secondary elements 8, in accordance with the description above, which even more advantageously form two rear elements of said main body 6. Preferably, each of said secondary elements 8 is connected to the primary element 7, which then forms a front element of the main body 6, by means of articulation 13 as described above. Preferably, the two secondary elements 8 are identical to one another, by mirror symmetry with respect to a median sagittal plane P2 of the main body 6 of the device 1 (FIGS. 3 to 5 in particular). The secondary elements 8 can advantageously form two arms or branches for holding the main body 6 of the device 1 relative to the body of the user, and in particular around the neck of the latter as in the embodiment illustrated in the figures, when the main body 6 is in the deployed configuration. The respective articulation means 13 of each of the secondary elements 8 to the primary element 7 are then advantageously identical, one to the other, by mirror symmetry with respect to the median sagittal plane P2 of the main body 6 of the device 1. The kinematics of the secondary elements 8 and of the primary element 7 is therefore advantageously identical in mirror with respect to the median sagittal plane P2 of the main body 6, which simplifies the design of the device 1 and makes its use particularly simple , ergonomic and intuitive. Advantageously, the first and second pivot axes A-A', B-B' are parallel to each other, as previously envisaged, and moreover parallel to the median sagittal plane P2 of the main body 6.

Preferably, as in the embodiment illustrated in the figures, the primary element 7 of the main body 6 forms a single front element of the main body 6, and comprises the air inlet 2, the fan 3, the outlet of air 4, as well as the filtration device 5 if necessary, and the latter are shaped and arranged so that the median sagittal plane P2 constitutes a sagittal plane of symmetry of the main body 6 of the apparatus 1. Thus, the main body 6 has an excellent weight balance ensuring that it stays in place and is very comfortable to use for the user.

However, other configurations are of course possible, although less advantageous in particular in terms of size in the folded configuration of the body major. For example, the articulated main body of the device could comprise a single secondary element forming a rear element of the main body, and two identical primary elements by symmetry, each bearing an air outlet configured to blow a flow F of air generated towards a user's airways. According to another example, the articulated main body of the device could comprise a single primary element forming a front element, connected by the articulation means to a single secondary element respectively forming a rear element of the main body of the device.

Preferably, the apparatus 1 further comprises adjustment means 47 for adjusting a characteristic dimension of said at least one secondary element 8, and more particularly a length of this or these latter(s), and thus adjusting the apparatus 1 to the user. By acting on these adjustment means 47, the user can thus adjust the dimensions of the secondary element(s) 8 of the main body 6 of the device 1 according to his own morphology. As in the embodiment illustrated in the figures, said adjustment means 47 can thus be advantageously designed and configured to allow adjustment of the length of the secondary element(s) 8 in order to adjust the dimensions of the main body. 6 of the device 1 to the diameter of the user's neck, taking into account, where appropriate, the presence of clothing or a clothing accessory at the level of the user's neck. Thus, the main body 6 of the device 1 fits perfectly around the neck of the user, providing the latter with great comfort in using the device 1. Preferably, said adjustment means 47 comprise a slide telescopic, which advantageously makes it possible to shorten or lengthen at will the length of the secondary element(s), in a simple, reliable and robust manner.

As in the embodiment illustrated in the figures, the device 1 can advantageously comprise a temporary locking system 48, reversible, to prevent (or at the very least limit the possibility of) a relative pivoting of the primary 7 and secondary 8 elements. , according to one and/or according to the other of the first and second pivot axes A-A', B-B', when the main body 6 of the device 1 is in said relative deployed configuration of the primary elements 7 and secondary 8, and in particular once the main body 6 of the device 1 is placed on the user. Such a temporary locking system 48 makes it possible in particular to limit the risk of separation of the main body 6 and the body of the user, under the effect by example of an undesirable passage of the primary 7 and secondary 8 elements from their deployed reference position to a position beyond the latter (for example in the event of a strong jolt imparted to the main body 6 during a sudden movement of the user). For example, as in the embodiment illustrated in the figures, the temporary locking system 48 can advantageously be arranged at the level of a free end 49 of each of the two secondary elements 8, opposite to one end of the two secondary elements 8 at the level of which the latter are connected to the primary element 7 by the hinge means 13. For example, the temporary locking system 48 can comprise magnetic or ferromagnetic elements (including for example one or more permanent magnets 50), arranged at the level with the free end 49 of each of the two secondary elements 8 and which cooperate to temporarily maintain the secondary elements 8 in magnetic contact, after the main body 6 has been positioned on the user, and the length of one and/or the other of the secondary elements 8 has been adjusted using the adjustment means 47 considered above, if necessary. Thus, as in the example illustrated in the figures, the temporary locking system 48 advantageously makes it possible to join the free ends 49 of the secondary elements 8, and to contribute to giving and thus maintaining a closed annular shape of the main body 6 of the device 1, which will thus adapt perfectly to the morphology of the neck of the user. Other temporary locking systems can be considered as an alternative, such as a spring plunger system, a valve and spring system, a locking system with notch and release latch, a screw system (quarter turn, example), a press fit system, a mechanical snap system, etc. In the event that the main body 6 comprises only a single primary element 7 connected to a single secondary element 8, the temporary locking system 48 could be arranged at a free end 49 of the secondary element 8 and a corresponding locking zone of the primary element 7, to temporarily lock the free end 49 of the secondary element 8 and said locking zone of the primary element 7 into contact. much more complex to implement in practice, the temporary locking system 48 could be designed and configured to mechanically lock the articulation means 13 themselves, and prohibit (or at least limit) temporarily, in a reversible manner, pivoting relative primary 7 and secondary 8 elements once the main body 6 of the device 1 is in place. Typically, the fan 3 of the device 1 constitutes a motorized fan unit comprising at least one electric motor and at least one propeller or fan wheel connected to the electric motor. Advantageously, the device 1 also comprises a device for controlling the fan 3, to allow the user to control its starting, the speed of rotation, etc. Advantageously, the fan 3 is a centrifugal fan, or radial turbine fan, and even more advantageously a so-called “squirrel cage” or “action” centrifugal fan. Such a fan 3 indeed has the advantage of allowing the generation of an air flow F of high flow rate and pressure, with excellent efficiency, and for a limited size. In the embodiment illustrated in the figures, the device 1 comprises a single fan 3 (or motor-driven fan unit), in aeraulic communication with a single air inlet 2 and with a single air outlet 4, via a duct of single internal air. However, in variants, the device 1 could comprise a plurality of fans in aeraulic communication, on the one hand each with the same single air inlet or each with a corresponding separate air inlet and, on the other hand each with a corresponding separate air outlet to thereby generate a plurality of separate forced air flows to the user. For example, the device 1 could include two fans, respectively arranged in one and the other of the two secondary elements 8 rear. Each of the rear secondary elements 8 could then include an air inlet, and the device 1 would include two separate internal air ducts to conduct the two forced air flows thus generated to a single air outlet carried by the front primary element. Advantageously, the energy required for the electrical operation of the device 1, and in particular of the fan 3, is supplied by an electric storage battery, which is preferably arranged inside the primary element 7. Advantageously, the electrical operation of the device 1 can be controlled by the user via at least one on/off button, which is preferably carried by the primary element 7.

Optionally, the device 1 may include a retractable foot 51, to adjust the positioning of the main body 6 relative to the body of the user, and in particular to ensure the most stable positioning and maintenance possible of the air outlet. 4 of the primary element 7 of the main body 6, as close as possible (but advantageously still at a distance) from the user's respiratory tract. As illustrated by example in the figures, such a retractable foot 51 can be connected to the primary element 7 of the main body 6, and be provided with a support surface 52 on a part of the body, and preferably on the chest, of the user. Advantageously, the retractable foot 51 is designed to be completely retractable inside the primary element 7, foldable to pivot in the direction of the latter, and/or be telescopic. Such a retractable foot 51 advantageously makes it possible to best adapt the device 1 to the morphology of the user by directing the air outlet 4 as close as possible to the respiratory tract of the latter, or on the contrary by allowing him to move away the air outlet 4 according to its needs, during use of the device 1. When the primary element 7 advantageously forms a front element of the main body 6 of the device 1, as in the illustrated embodiment in the figures, the manipulation of the retractable foot 51 thus advantageously allows the front element to describe a stroke going from the chest of the user (low position) to the nose of the wearer (high position), and vice versa. Thus the user can bring the front element closer or further away from his mouth as he wishes and adapt the flow F of blown air to his needs. The user can also, with one hand, lower the front element to facilitate his communication with those around him by clearing his face.

Advantageously, the primary element 7 comprises at least one air diffusion portion 53 (or diffuser), which defines or carries said air outlet 4, and which is preferentially transparent or translucent, so as to limit the visual masking of the face of the user by the device 1. Optionally, the device 1 can comprise a sensor for fine particles and/or volatile organic compounds, which detects the presence of fine particles and/or volatile organic compounds in the ambient air surrounding and measures the concentration. Preferably, said sensor is then housed in the primary element 7. Advantageously, such a sensor is designed and configured to transmit to a computer or to a remote smart telephone, for example via a wireless data link, information relating to the presence and concentration of such fine particles and/or volatile organic compounds, so as to inform the user about the quality of the surrounding air.

It is clearly understood that, in the foregoing, the terms "primary", "secondary", "first" / "first", "second" do not imply, as such, any particular technical limitation, and are not employed only in order to lexically differentiate certain elements of the device 1 described. POSSIBILITY OF INDUSTRIAL APPLICATION

The invention finds its application in the design and manufacture of assisted ventilation devices, such as in particular assisted ventilation air filtration devices.

Claims

1. Device (1) with assisted ventilation, individually portable, comprising at least one air inlet (2), at least one fan (3), and a main body (6) including:

- at least one primary element (7) comprising at least one air outlet (4) configured to blow a flow (F) of air generated by the ventilator (3) towards the respiratory tract of a user, and

- at least one secondary element (8), said apparatus (1) being characterized in that the primary (7) and secondary (8) elements are interconnected by articulation means (13, 13') to allow the main body (6) to move between a relative folded configuration of the primary (7) and secondary (8) elements and a relative deployed configuration of the primary (7) and secondary (8) elements, and vice versa, said articulation means ( 13, 13') authorizing

- a first relative pivoting (R1) of the primary (7) and secondary (8) elements, along a first pivoting axis (A-A'), between a folded position and a deployed reference position, and

- a second relative pivoting (R2) of the primary (7) and secondary (8) elements, along a second pivot axis (B-B'), beyond said deployed reference position, said first and second pivot axes (A-A', B-B') being distant and distinct from each other.

2. Apparatus (1) according to the preceding claim, characterized in that the second pivot axis (B-B ') is offset outwards from the main body (6) relative to the first pivot axis (A-A' ).

3. Apparatus (1) according to the preceding claims, characterized in that said second pivot axis (B-B') is positioned on an edge (15, 15') of an external surface of the apparatus (1).

4. Apparatus (1) according to any one of the preceding claims, characterized in that the first pivot axis (A-A') is substantially orthogonal to a transverse median plane (P1) of extension of the main body (6) of the device (1).

5. Apparatus (1) according to any one of the preceding claims, characterized in that the first and second pivot axes (A-A\B-B') are parallel to each other.

6. Apparatus (1) according to any one of the preceding claims, characterized in that said articulation means (13, 13') comprise an elastic hinge (16, 16') which allows said first pivoting (R1) relative to the primary (7) and secondary (8) elements and said second relative pivoting (R2) of the primary (7) and secondary (8) elements, the elastic hinge (16, 16') comprising an elastic return member (17, 17' ) to automatically recall the primary (7) and secondary (8) elements to said reference deployed position when said primary (7) and secondary (8) elements are in a position beyond said reference deployed position.

7. Apparatus (1) according to the preceding claim, characterized in that said elastic return member (17, 17 ') comprises at least one of: a helical traction spring (17A), a helical spring (17B) of torsion, a flat spiral spring (17C) working in tension, and a helical compression spring (17D).

8. Apparatus (1) according to any one of claims 6 and 7, characterized in that the elastic hinge (16) comprises an intermediate connecting piece (18), which is connected to the primary element (7) by a pivot connection on the one hand, and which is connected to the secondary sliding element (8) along a curvilinear trajectory on the other hand, the elastic return member (17) connecting the intermediate connecting piece (18) to each other and the secondary element (8).

9. Device (1) according to any one of the preceding claims, characterized in that it comprises an elastic stop device which opposes the passage of the main body (6) of the device (1) from said folded configuration relative of the primary (7) and secondary (8) elements towards said relative deployed configuration of the primary (7) and secondary (8) elements, and vice versa, below a predetermined threshold force exerted against the primary elements (7 ) and secondary (8).

10. Apparatus (1) according to any one of the preceding claims, characterized in that the main body (6) comprises said air inlet (2) and said fan (3), said primary element (7) preferably comprising said air inlet (2) and said fan (3).

11. Apparatus (1) according to any one of the preceding claims, characterized in that, in said relative deployed configuration of the primary (7) and secondary (8) elements, the main body (6) forms a substantially annular body, or at least partially annular, wearable around the user's neck.

12. Apparatus (1) according to any one of the preceding claims, characterized in that the primary element (7) forms a front element of the main body (6) of the apparatus (1), the secondary element (8 ) forming a rear element of said main body (6).

13. Apparatus (1) according to the preceding claim, characterized in that it comprises two secondary elements (8), which are preferably identical by mirror symmetry with respect to a sagittal plane (P2) of the main body (6) of the device (1).

14. Apparatus (1) according to any one of the preceding claims, characterized in that it comprises adjustment means (47) for adjusting a length of the secondary element (8) and thus adjusting the apparatus (1) to the user, said adjustment means (47) preferably comprising a telescopic slide.

15. Apparatus (1) according to any one of the preceding claims, characterized in that it comprises a temporary locking system (48) to prevent relative pivoting of the primary (7) and secondary (8) elements when the main body (6) of the apparatus (1) is in said relative deployed configuration of the primary (7) and secondary (8) elements.

16. Apparatus (1) according to any one of the preceding claims, characterized in that it constitutes an apparatus (1) for filtering air with assisted ventilation.