CN216777696U

CN216777696U - Exhaust assembly and breathing mask

Info

Publication number: CN216777696U
Application number: CN202122407624.3U
Authority: CN
Inventors: 王亚杰; 何垄; 周明钊; 庄志
Original assignee: BMC Tianjin Medical Co Ltd
Current assignee: BMC Tianjin Medical Co Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2022-06-21
Anticipated expiration: 2031-09-30

Abstract

The utility model relates to an exhaust assembly and a breathing mask, relates to the technical field of treatment of respiratory related diseases, and is used for solving the technical problems of high noise and high respiratory resistance of the conventional breathing mask. According to the breathing mask, the second included angle theta is formed between the exhaust direction of the exhaust part and the second side surface of the exhaust component, and the first included angle beta is formed between the second side surface of the exhaust component and the matching surface, so that the respiratory waste gas of a user can be obliquely exhausted from the exhaust part 33 along the circumferential direction of the exhaust component 3, the purposes of low exhaust noise and difficulty in blowing to bed partners are achieved, noise reduction is not realized by adding a filter component, extra resistance cannot be caused to the respiration of the user, and the wearing comfort is improved.

Description

Exhaust assembly and breathing mask

Technical Field

The utility model relates to the technical field of treatment of respiratory related diseases, in particular to an exhaust assembly and a respiratory mask.

Background

Non-invasive ventilation therapy involves an interface device, typically a nasal mask, an oronasal mask, a nasal pillow mask or a full face mask type breathing mask, placed on the face of a user. During treatment, pressurized gas is provided to a respiratory mask via an external pressure support device (e.g., a ventilator), which connects the pressurized gas provided by the ventilator to the airway of the user, thereby delivering a flow of breathing gas into the airway of the user.

Respiratory mask devices typically include two portions, a frame and a cushion. The frame is a rigid or semi-rigid shell and the cushion includes a face-contacting element and a support element adjacent to the face element. At least a portion of the cushion forms a cavity that receives the nose or nasal bridge of the patient and is secured to the patient's face by headgear means to form a sealed cavity.

Breathing masks can be divided into exhaust masks and non-exhaust masks according to different exhaust modes. At present, a mask is used in a household environment and a part of medical environments. Namely: when the user exhales, the exhaled exhaust gas (the main component is CO)₂) May be collected in the mask and then vented through a vent.

The exhaust port for exhausting the exhaust gas is typically located on the respiratory mask, such as on the frame, on an elbow connected to the mask, in a gas delivery conduit coupled to the respiratory mask, or the like. Preventing carbon dioxide build-up in the mask by venting reduces mask wearer's "rebreathing" (repeated inhalation by itself of CO-emitting gas)₂) "is used. Wherein the size and configuration of the vent is such that: at low CPAP pressures, minimum safe exhaust airflow. It will be appreciated that the exhaust port needs to be sufficient to exhaust the exhaust gases from the respirator at low pressures and to maintain the CO in the respirator₂The content is below the safety limit. Typically, a suitable pressure for a nasal mask is 4hpa to 30hpa and a suitable pressure for a full face mask is 4hpa to 40 hpa. That is, the size and structure of the exhaust port are requiredTo be able to ensure a safe exhaust flow of the breathing mask at a pressure of 4 hpa.

For users with Obstructive Sleep Apnea (OSA) or chronic obstructive emphysema (COPD), respiratory masks are mostly worn for long periods of time in the evening. Exhaust noise is therefore an important issue in therapy. Excessive noise can reduce user compliance and affect the user's sleep with the bed partner. The exhaust noise of the exhaust hole is an important sound source in the treatment process. In addition, the relatively continuous constant Level plenum (CPAP) therapy may generate even more noise during BI-Level (BI-Level) therapy, such as additional turbulence noise during high and low pressure transitions due to gas acceleration and deceleration.

In addition, in addition to noise during the exhaust process, the "jetting effect" of the air flow from the exhaust port is also an important factor that reduces user compliance and affects sleep. Namely, the air flow formed by the exhaust can impact the bed partner, which causes discomfort to the other side and even induces various wind-cold diseases. In addition, the ejected airflow generated by the exhaust air can also hit obstacles, such as bedclothes, quilt covers, pillows and the like, and can generate additional airflow bounce and collision noise (noise generated by the airflow blowing to the surface of an object).

The respiratory mask as shown in fig. 1a and 1b comprises a frame 2 ', a cushion 1 ' inside the frame 2 ' and an elbow 5 ' outside the frame 2 '. Wherein the small vent holes 3 ' are provided on the elbow 5 ' (fig. 1 a) or on the frame 2 ' (fig. 1 b). In the breathing mask, the small exhaust holes 3' are generally distributed in a cluster-like concentrated manner for the convenience of mold forming. Generally, the magnitude of exhaust noise is related to the hole pitch and the exhaust direction for the same hole diameter. The larger the hole pitch, the more divergent the exhaust direction, and the lower the exhaust noise. The hole spacing is limited by the mold and product configuration and can generally only be increased to a limited extent. Under the influence of the mold stripping direction, the exhaust direction of the small holes cannot be sufficiently dispersed, and the attenuation of the ejected air flow is slow. Thereby causing the defects of air flow concentration, strong jetting effect and easy interference with bed partner.

The respiratory mask as shown in fig. 1c comprises a frame 2 ', a cushion 1 ' inside the frame 2 ' and an elbow 5 ' outside the frame 2 '. Wherein, the small exhaust holes 3 'are arranged on the elbow 5'. The filter cotton 60 and the filter cotton cover 6 are arranged outside the small exhaust holes 3' so as to play a role in diluting noise. However, since the filter 60 and the filter cover 6 are provided, the breathing resistance when the user wears the filter becomes large, and the comfort in use is lowered.

In addition, another existing respiratory mask includes a cushion, a frame, and an elbow on which a vent cap is removably disposed. The vent cap includes support arms and vent holes separated by the support arms, through which the patient's respiratory waste gases are expelled. Because the support arms and the vent holes on the vent cap are arranged at intervals around the circumference of the vent cap, the forming process of the vent cap is complex, and the manufacturing cost is high; and need carry out the mould division at the venthole during shaping, easily form and drape over one's shoulders the cutting edge of a knife or a sword, and it can disturb the smooth discharge of air current, therefore exhaust noise is great.

SUMMERY OF THE UTILITY MODEL

The utility model provides an exhaust assembly and a breathing mask, which are used for solving the technical problems.

According to a first aspect of the present invention, there is provided an exhaust assembly for a respiratory mask, comprising an inner wall, an outer wall and a sloped wall disposed between the inner wall and the outer wall, the sloped wall being provided with exhaust holes, the sloped wall comprising an air intake side and an exhaust side, an area of an inner side of the exhaust holes on the sloped wall being different from an area of an outer side of the exhaust holes on the sloped wall.

In one embodiment, the exhaust holes are distributed in a single row in the geometric extension direction of the inclined wall.

In one embodiment, an area of an inner side of the exhaust hole on the inclined wall is larger than an area of an outer side of the exhaust hole on the inclined wall.

In one embodiment, an area of an inner side of the vent hole on the inclined wall is smaller than an area of an outer side of the vent hole on the inclined wall.

In one embodiment, the exhaust direction of the exhaust hole and the plane of the exhaust side of the inclined wall form a second included angle theta.

In one embodiment, the second included angle θ is 70 ° to 90 °.

In one embodiment, the number of the exhaust holes is multiple, and the exhaust direction of each exhaust hole is a connecting line direction of a midpoint of an upper end surface of the exhaust hole and a midpoint of a lower end surface of the exhaust hole.

In one embodiment, the exhaust hole is in the shape of an oblong, an ellipse, a circle, a rectangle, a profile with sharp corners, or a structure formed by at least two straight lines which are relatively parallel and at least one arc line which directly connects two lines.

In one embodiment, the exhaust holes are distributed divergently, and the number of the adjacent exhaust holes of each exhaust hole is at most 2.

In one embodiment, the exhaust holes are distributed annularly.

In one embodiment, the wall thickness of the vent assembly is 0.8-1.2 mm.

In one embodiment, the wall thickness of the vent assembly is equal to the hole depth of the vent hole.

In one embodiment, when the exhaust assembly is disposed on a frame or cushion of the respiratory mask, the inner wall is configured as a portion of the frame or cushion.

In one embodiment, when the exhaust assembly is disposed on a frame or cushion of the respiratory mask, the outer wall is configured as a portion of the frame or cushion.

According to a first aspect of the present invention, there is provided a respiratory mask comprising a mask body and an exhaust assembly as described above, the interior of the mask body being adapted to contact a user's face, the exhaust assembly being disposed on the exterior of the mask body, gas on the interior of the mask body being expelled outwardly through the exhaust assembly.

In one embodiment, the plane where the outer side of the mask body joins the first side of the exhaust assembly is a mating plane, and the second side of the exhaust assembly forms a first included angle β with the mating plane.

In one embodiment, the first included angle β is 30 ° to 70 °.

In one embodiment, the distribution of the exhaust holes conforms to the outer contour shape of the exhaust component.

In one embodiment, further comprising a vent line comprising a flexible hose or elbow, the second side of the vent assembly being connected to the flexible hose or elbow.

In one embodiment, the second side of the vent assembly is provided with a mounting portion that forms a revolute pair connection or a spherical pair connection with the flexible hose.

In one embodiment, the mounting portion is configured as a mounting hole, an inner wall of the mounting hole is provided with a first protrusion for mating with an outer wall of the flexible pipe;

the first bulge surrounds the inner wall of the mounting hole for a circle; or the first bulges are arranged at intervals along the circumferential direction of the mounting hole.

In one embodiment, the first side of the exhaust assembly is provided with a mounting post, the outer wall of which is provided with an annular groove for mating with the mask body;

a first buckling bulge and a second buckling bulge are respectively arranged on two sides of the annular groove, and the first buckling bulge and the second buckling bulge respectively encircle the outer wall of the mounting column for one circle; or the first buckling bulges and the second buckling bulges are arranged at intervals along the circumferential direction of the mounting column respectively.

In one embodiment, the outer wall of the mounting column is further provided with a rotation stopping protrusion, the rotation stopping protrusion is configured as a protruding structure which is positioned on the annular groove and extends along the axial direction of the exhaust assembly,

the anti-rotation projections cooperate with anti-rotation recesses on the mask body to limit rotation of the exhaust assembly relative to the mask body.

In one embodiment, the exhaust assembly further comprises an air chamber in communication with the chamber in the mask body and the exhaust vent, respectively, the air chamber being configured to have a larger end and a smaller end.

In one embodiment, the air cavity is an annular cavity surrounding the circumference of the exhaust assembly; or the air cavity is a groove body which is arranged along the circumferential direction of the exhaust assembly at intervals.

In one embodiment, the mask body includes a cushion and a frame, the cushion and frame being connected by a fit, or the cushion and frame being of unitary construction.

In one embodiment, the exhaust assembly and the frame are configured to be connected by a direct fixed connection, connected by a mating connection, or formed by an integral construction.

In one embodiment, the respiratory mask is one of a full face mask, a nasal mask, an oral mask, or a nasal cushion mask.

Compared with the prior art, the utility model has the advantages that the second included angle theta is formed between the exhaust direction of the exhaust part and the second side surface of the exhaust assembly, and the first included angle beta is formed between the second side surface of the exhaust assembly and the matching surface, so that the breathing waste gas of a user can be obliquely exhausted from the exhaust part 33 along the circumferential direction of the exhaust assembly 3, the purposes of low exhaust noise and difficulty in blowing to a bed partner are achieved, the noise reduction is not realized by adding a filter part, no extra resistance is caused to the breathing of the user, and the wearing comfort is improved.

Drawings

The utility model will be described in more detail hereinafter on the basis of embodiments and with reference to the accompanying drawings.

FIGS. 1a, 1b and 1c are schematic views of a prior art respirator;

FIG. 2 is a schematic perspective view of a respiratory mask in one embodiment of the present invention;

FIG. 3 is an exploded view of the respiratory mask of FIG. 2;

FIG. 4 is a schematic diagram of the exhaust assembly of the respiratory mask of FIG. 2 shown separated from the mask body; the circumferential direction of the exhaust assembly and the plugging direction of the exhaust assembly are shown;

FIG. 5 is a schematic perspective view of the vent assembly shown in FIG. 2 (as viewed from a second side of the vent assembly);

FIG. 6 is a schematic perspective view of the vent assembly shown in FIG. 2 (as viewed from a first side of the vent assembly);

FIG. 7 is a front view of the exhaust assembly shown in FIG. 2 (as viewed from a second side of the exhaust assembly);

FIG. 8 is a cross-sectional view at A-A of FIG. 7;

FIG. 9 is an enlarged view of FIG. 8 at A;

FIG. 10 is a schematic view of the direction of ventilation of the respiratory mask of FIG. 2;

11a, 11b, 11c and 11d show different shapes of vent holes in different embodiments of the utility model;

12a, 12b, 12c and 12d show different distributions of the vent holes in different embodiments of the utility model;

FIG. 13 is a front view of the respiratory mask of FIG. 2;

FIG. 14 is a cross-sectional view at B-B of FIG. 13;

FIG. 15 is an enlarged view of FIG. 14 at B;

FIG. 16 is a schematic perspective view of a respiratory mask in accordance with another embodiment of the present invention;

fig. 17 is a front view of the respiratory mask shown in fig. 16.

Reference numerals:

10-a mask body; 1-a liner; 2-a frame; 3-an exhaust assembly; 4-a flexible hose; 5-bending the pipe; 31-mounting holes; 32-mounting posts; 33-an exhaust section; 34-an air cavity; 311-a first bump; 321-a first snap-fit projection; 323-second snap projections; 322-an annular groove; 324-rotation stop protrusions; 331-vent hole.

Detailed Description

The utility model will be further explained with reference to the drawings.

The conventional breathing mask shown in fig. 1a and 1b has the disadvantages that the air flow discharged from the small air discharge holes 3' is concentrated, the jet effect is strong, and the bed partner is easily disturbed. In the conventional breathing mask shown in fig. 1c, the user has a relatively large breathing resistance and therefore has a relatively low comfort.

In view of the above problems, the present invention provides a respiratory mask, which has a low-noise exhaust feature, and the exhausted airflow can be quickly attenuated and diffused without disturbing the bed partner, and does not generate resistance to the respiration of the user, so that the comfort level is high. The exhaust component 3 of the present invention is used for a breathing mask, and specifically, the exhaust component 3 includes an inner wall 301, an outer wall 302, and an inclined wall 303 (see fig. 5) disposed between the inner wall 301 and the outer wall 302, an exhaust hole 331 (exhaust portion 33) is provided on the inclined wall 303, the inclined wall 303 includes an air intake side and an exhaust side, and an area of an inner side of the exhaust hole 331 on the inclined wall 303 is different from an area of an outer side of the exhaust hole 331 on the inclined wall 303. In this embodiment, the concentration of the gas flow in the same direction is reduced by providing a sloped wall to allow the gas to be discharged divergently.

The present inventors have innovatively found that when the area of the inner side of the exhaust hole 331 on the inclined wall 303 is the same or substantially the same as the area of the outer side of the exhaust hole 331 on the inclined wall 303, a large noise is generated; therefore, the present invention sets the area of the inner side of the discharge hole 331 on the inclined wall 303 to be different from the area of the outer side of the discharge hole 331 on the inclined wall 303, thereby obtaining a technical effect of effectively reducing noise.

Alternatively, the area of the inner side of the exhaust hole 331 on the inclined wall 303 is smaller than the area of the outer side of the exhaust hole 331 on the inclined wall 303, and thus noise is low and bed partner is not substantially blown.

Alternatively, the area of the inner side of the discharge hole 331 on the inclined wall 303 is smaller than the area of the outer side of the discharge hole 331 on the inclined wall 303.

Furthermore, the vent holes 331 in the embodiments of the present invention are distributed in only a single row in the geometric extension direction of the inclined wall 303. For example, the exhaust holes 331 are distributed in only one circle (or one layer) in the circumferential direction of the inclined wall 303, so the present invention completely abandons the existing exhaust hole arrangement mode (as shown in fig. 1a, 1b and 1c, the existing exhaust holes are gathered into one cluster or one pile) for the exhaust holes 331, and adopts a divergent distribution mode, thereby obtaining a better noise reduction effect.

Both of the above-described alternative embodiments can obtain an effect of effectively reducing noise.

The exhaust assembly 3 will be described in detail below in connection with a respiratory mask.

As shown in fig. 2 to 4, the respiratory mask of the present invention includes a mask body 10, an inner side of the mask body 10 being for contact with a face of a user, and an outer side of the mask body 10 being provided with an exhaust assembly 3, wherein a plane of the mask body 10 that is farthest from and substantially parallel to the face of the patient is defined as a reference plane α. The first side of the exhaust assembly 3 is a mating surface for connection with the mask body 10, and the reference plane α may be the mating surface, as shown in fig. 4 and 9. The second side surface of the exhaust component 3 and the matching surface form a first included angle beta. As shown in fig. 5, the second side of the exhaust component 3 is provided with the exhaust part 33, and the gas inside the mask body 10 is exhausted outwards through the exhaust part 33, as shown in fig. 7-9, the exhaust direction of the exhaust part 33 and the second side of the exhaust component 3 form a second included angle θ, so that the respiratory waste gas of the user can be obliquely exhausted from the exhaust part 33 along the circumferential direction of the exhaust component 3, the exhaust noise is low, the respiratory waste gas is not easy to blow to a bed partner, and the wearing comfort is improved.

The exhaust direction of the exhaust portion 33 is determined by the first angle β and the second angle θ together. Specifically, the exhaust part 33 includes a plurality of exhaust holes 331, and in some embodiments, the circumferential wall of the exhaust holes 331 is symmetrical with respect to the center. In these embodiments, the air discharge direction of each air discharge hole 331 is a direction (shown by an arrow in fig. 9) connecting a midpoint of an upper end surface of the air discharge hole 331 (shown as a point B in fig. 9) and a midpoint of a lower end surface of the air discharge hole 331 (shown as a point a in fig. 9).

As mentioned above, the second side of the exhaust assembly 3, i.e. the inclined wall 303 as described above, is inclined with respect to the reference plane a by an angle β, which first angle β may be 30 ° -70 °, preferably 45 ° -55 °. The exhaust hole 331 is opened on an inclined surface. As shown in fig. 9, the angle between the exhaust direction of the exhaust portion 33 and the second side surface of the exhaust assembly 3 is θ, wherein the second angle θ is 70 ° to 90 °, preferably 90 °. Therefore, the exhaust direction of the exhaust hole 331 (as shown by the arrows in fig. 9, 14, and 15) is determined by the first included angle β and the second included angle θ, so that the air flow can be rapidly attenuated after exiting the exhaust hole 331 by adjusting the first included angle β and the second included angle θ, and the air flows of the exhaust holes 331 are less likely to interfere with each other, so that the user end can obtain quieter noise, lower impact energy of the air flow, and no interference to the experience of the user's bed partner.

It will be appreciated that in other embodiments, the peripheral wall of the exhaust hole 331 may be asymmetric or non-circumferential, which may still be effective in reducing noise while meeting the above-described structural angles.

Further, the radial sectional area of the exhaust hole 331 is gradually reduced or gradually increased in a direction from the second side to the first side of the exhaust component 3. I.e., the exhaust hole 331 is configured as a tapered hole. In the embodiment shown in fig. 9, the exhaust hole 331 is configured such that the cross-sectional area of its lower end surface is smaller than the cross-sectional area of its upper end surface. Therefore, all the exhaust holes 331 can be molded along the same direction, and the manufacturing process is simple.

In addition, the air vent 331 can be formed by vertically punching the mold. Compared with the prior art, the exhaust hole 331 has better process formability and low process cost.

The radial section of the discharge hole 331 may be constructed in various shapes. As shown in fig. 7, 11a, 11b, 11c and 11d, the exhaust holes 331 having different radial cross-sections in different embodiments are respectively shown. Fig. 7 shows the air discharge hole 331 having an elongated (or oblong) cross section; fig. 11a shows a vent hole 331 having a circular cross-section; fig. 11b shows a vent 331 having a rectangular cross-section; FIG. 11c shows a vent 331 having an elliptical cross-section; fig. 11d shows the air discharge hole 331 having a irregularly shaped section with a sharp corner.

It is understood that the vent 331 may take various other shapes, such as a structure of at least two straight lines that are relatively parallel and at least one arc line that connects two straight lines, and the present invention does not exhaust the possible shapes.

The exhaust holes 331 may be distributed in various manners, such as uniformly distributed at equal intervals or non-uniformly distributed at unequal intervals. In the embodiment shown in fig. 7, adjacent discharge holes 331 have the same interval therebetween, for example, the distance or angle between adjacent discharge holes 331 is the same.

The exhaust holes 331 are substantially annularly distributed along the circumference of the exhaust assembly 3. The distribution of the discharge holes 331 depends on the overall shape of the discharge assembly 3. For example, the radial cross section of the exhaust assembly 3 may be configured as a circle as shown in fig. 7, an ellipse as shown in fig. 12b, or a profile formed by splicing at least two circular arcs as shown in fig. 12a, 12c, and 12d, so that the distribution of the exhaust holes 331 may conform to the outer contour shape of the exhaust assembly 3.

For example, fig. 7 shows that the exhaust holes 331 are provided on a circle concentric with the exhaust assembly 3; fig. 12a, 12b, 12c and 12d show that the discharge holes 331 are distributed on an arc that coincides (is concentric) with one of the contour lines of the discharge element 3, and thus the discharge position and arrangement shape of the discharge holes 331 are determined by the shape of the discharge element 3.

The present invention provides a preferred embodiment, i.e., the embodiment shown in fig. 11b, in which the exhaust assembly 3 has an overall cylindrical structure, and the radial section of the exhaust hole 331 is configured to be rectangular (square) for mold formation. The plurality of exhaust holes 331 are distributed on a circle concentric with the exhaust assembly 3, and the plurality of exhaust holes 331 are equally spaced apart from each other, thereby facilitating control of air column spacing of exhaust air flow to facilitate noise control.

As described above, the exhaust holes 331 are distributed in only a single row in the geometric extension direction of the inclined wall 303, and therefore, it can be understood that, in the above embodiments, the exhaust holes 331 are arranged divergently, and the number of the adjacent exhaust holes of each exhaust hole 331 is at most 2. The discharge hole 331 as shown in fig. 12a, 12b, 12c, and 12d is adjacent to only the left and right discharge holes 331. In other words, the exhaust holes 331 of the present invention have a distribution structure of only one layer, one row or one column, and the present invention reduces the number of the exhaust holes 331 adjacent to the exhaust holes 331 compared to a distribution structure of a plurality of rows and a plurality of columns (as shown in fig. 1a, 1b and 1c, the exhaust holes may have a plurality of adjacent exhaust holes), thereby effectively reducing noise.

The thickness of the exhaust part 33 is small, and may be, for example, 0.8 to 1.2 mm. The wall thickness of the discharge portion 33 may be the hole depth of the discharge hole 331.

The respiratory mask of the present invention further includes a ventilation circuit, which in the embodiment shown in fig. 3 includes a flexible hose 4, the flexible hose 4 being connected to the second side of the exhaust assembly 3. Wherein the flexible hose 4 and the exhaust assembly 3 can be connected in a rotatable manner. Namely, the exhaust assembly 3 and the flexible hose 4 can rotate relatively, and the flexible hose 4 needs to be connected with an air inlet pipeline of the respirator, so that the relative position between the flexible hose 4 and the exhaust assembly 3 can be correspondingly adjusted according to the posture of a user through the relative rotation between the flexible hose 4 and the exhaust assembly 3, and better following performance is realized.

The second side of the exhaust assembly 3 is provided with a mounting portion. Preferably, the mounting portion is configured as a mounting hole 31, so that a cylindrical connection is formed between the mounting hole 31 and the hose 4, and a rotation pair is formed between the exhaust assembly 3 (mounting hole 31) and the flexible hose 4. Alternatively, the mounting portion is configured as a spherical mounting groove that provides a spherical connection with the flexible hose 4, thereby forming a spherical pair between the exhaust assembly 3 and the flexible hose 4.

The following description will be made taking as an example the above preferred form of the revolute pair between the exhaust unit 3 and the flexible hose 4.

As shown in fig. 8, 13, 14 and 15, the inner wall of the mounting hole 31 is provided with a first protrusion 311, and the first protrusion 311 is used for matching with the outer wall of the flexible pipe 4; wherein, the first protrusion 311 surrounds the inner wall of the mounting hole 31 for a circle; or the first protrusions 311 are provided at intervals in the circumferential direction of the mounting hole 31.

The first protrusion 311 is engaged with the outer wall of the flexible hose 4, so that when the flexible hose 4 is mounted on the exhaust assembly 3, the degree of freedom of the flexible hose 4 in the insertion and extraction direction shown in fig. 4 can be restricted, and the flexible hose 4 is not easily extracted from the mounting hole 31 of the exhaust assembly 3, thereby forming a stable connection between the flexible hose 4 and the exhaust assembly 3. It will be appreciated that other mounting structures may be provided on the inner wall of the mounting hole 31 to accommodate the flexible hose 4, for example, a groove may be provided on the inner wall of the mounting hole 31 to mate with the flexible hose 4, or a magnetic structure may be provided on or in the inner wall of the mounting hole 31 to magnetically mate with the flexible hose 4.

Wherein the flexible hose 4 may be made of the same or different material as the vent assembly 3, for example both may be made of polypropylene material (PP material) or polycarbonate material (PC material).

Alternatively, the vent assembly 3 may be configured to be attached to the frame 2 of the mask body 10 in a direct, fixed connection (e.g., ultrasonic welding, adhesive). For example, when the vent assembly 3 is of the same material as the frame 2, the vent assembly 3 is preferably ultrasonically attached to the frame 2. The exhaust assembly 3 and the frame 2 may be made of polypropylene (PP) or Polycarbonate (PC).

Alternatively, the exhaust assembly 3 is constructed to be formed in an integral construction with the frame 2 of the mask body 10. That is, the exhaust assembly 3 is formed integrally with the frame 2.

Preferably, the exhaust assembly 3 may be configured to be matingly connected to the frame 2 of the mask body 10. When the material of the exhaust module 3 and the frame 2 is different, it is preferable that the exhaust module 3 is attached to the frame 2 in an assembling manner. And in one configuration, as shown in fig. 4, the exhaust assembly 3 may be configured to be fixedly coupled to the frame 2 of the mask body 10 without rotation relative thereto. In another arrangement, the exhaust assembly 3 may be configured to be rotatably coupled to the frame 2 of the mask body 10 so that relative rotation is possible therebetween.

Further, the connection manner of the exhaust module 3 to the frame 2 may be selected according to the connection manner between the flexible hose 4 and the exhaust module 3. For example, it is preferable that the flexible hose 4 and the exhaust assembly 3 are relatively rotatable, and the exhaust assembly 3 and the frame 2 are not relatively rotatable.

Specifically, as shown in fig. 6-9, the first side of the exhaust assembly 3 is provided with a mounting post 32, as shown in fig. 8 and 9, and referring to fig. 13, 14 and 15, the outer wall of the mounting post 32 is provided with an annular groove 322, and the annular groove 322 is used for matching with the mask body 10 (frame 2); a first buckling protrusion 321 and a second buckling protrusion 323 are respectively arranged on two sides of the annular groove 322, and the first buckling protrusion 321 and the second buckling protrusion 323 respectively surround the outer wall of the mounting column 32 for a circle; or the first engaging protrusion 321 and the second engaging protrusion 323 are respectively disposed along the circumferential direction of the mounting post 32 at intervals.

When the exhaust assembly 3 is mounted on the frame 2, the annular groove 322 is in contact fit with the inner wall of the attachment hole on the frame 3, thereby functioning to restrict the translation between the exhaust assembly 3 and the frame 2 in the circumferential direction, so that the circumferential degree of freedom of the exhaust assembly 3 is limited. In addition, the first engaging protrusion 321 and the second engaging protrusion 323 are engaged with the inner wall bosses of the connecting hole on the frame 2, respectively, thereby achieving the purpose of limiting the degree of freedom of the exhaust assembly 3 in the inserting and extracting direction with respect to the frame 2.

Further, in order to prevent relative rotation between the exhaust assembly 3 and the frame 2, a rotation stopping protrusion 324 may be provided on an outer wall of the mounting post 32, and the rotation stopping protrusion 324 is configured as a protruding structure extending in the axial direction of the exhaust assembly 3 on the annular groove 322. The rotation stop protrusion 324 cooperates with a rotation stop groove (not shown) on the frame 2 to restrict rotation between the exhaust assembly 3 with respect to the mask body 10 (frame 2), and thus the rotational freedom of the exhaust assembly 3 is limited.

In addition, if the exhaust unit 3 is rotatably connected to the frame 2 of the mask body 10, the rotation stop protrusion 324 may not be provided.

As shown in fig. 6, 8 and 9, the exhaust assembly 3 further includes an air chamber 34, and the air chamber 34 is respectively communicated with the internal chamber of the mask body 10 and the exhaust hole 331, and the air (CO) exhaled by the user when wearing the mask is exhausted₂) Enters the inner chamber of the mask body 10, then enters the air chamber 34 and is discharged to the outside through the discharge hole 331.

The air cavity 34 may be configured to have a uniform width. It may also be configured to have a non-uniform width, such as a structure that is larger at one end and smaller at the other (a trumpet structure).

Alternatively, the air chambers 34 are distributed around the exhaust assembly 3 in a full circle, i.e., the air chambers 24 are provided in the entire axial direction of the exhaust assembly 3, as shown in fig. 6. Alternatively, the air chambers 34 are distributed along the annular portion of the exhaust assembly 3, that is, the air chambers 24 are partially disposed in the axial direction of the exhaust assembly 3, which can increase the flow passage of the air flow, slow down the flow velocity of the air flow, and thus reduce the exhaust noise.

Fig. 16 and 17 show a variant of the above embodiment. Differences from the above embodiments will be described below, and the same parts will not be described again.

In the embodiment shown in fig. 16 and 17, the vent line comprises an elbow 5, the elbow 5 being connected to the second side of the exhaust assembly 3. In particular, the elbow 5 is fixedly connected to the exhaust assembly 3, i.e. any degree of freedom of the elbow 5 relative to the exhaust assembly 3 is limited. For example, the elbow 5 and the exhaust assembly 3 may be connected by fitting, adhesive, ultrasonic welding, or the like.

In this embodiment, the exhaust component 3 may be connected to the frame 2 of the mask body 10 in the above-described fitting manner, and the exhaust component 3 may be relatively rotated with respect to the frame 2.

In this embodiment, in order to prevent the air flow discharged from the air discharge hole 331 from blowing to the bent pipe 5 to generate collision noise, the air discharge hole 331 is provided on the air discharge unit 3 in a direction curved away from the bent pipe 5. As shown in fig. 17, since the exhaust hole 331 is provided only in the upper half of the exhaust unit 3, the air flow discharged from the exhaust hole 331 does not contact the bent pipe 5, and the collision noise can be effectively avoided.

Further, the present invention provides another variation of the above-described embodiment. Differences from the above embodiments will be described below, and descriptions of the same will be omitted.

In this embodiment, the vent line comprises a flexible hose 4 and an elbow 5, the elbow 5 being connected to the second side of the vent assembly 3. In particular, the elbow 5 is fixedly connected to the exhaust assembly 3, i.e. any degree of freedom of the elbow 5 relative to the exhaust assembly 3 is limited. For example, the elbow 5 and the exhaust assembly 3 may be connected by fitting, adhesive, ultrasonic welding, or the like.

One end of the flexible hose 4 is connected with one end of the elbow pipe 5 far away from the exhaust component 3, and the other end of the flexible hose 4 is connected with an air inlet pipeline of the respirator.

The mask body 10 described in each of the above embodiments includes a cushion 1 and a frame 2. Alternatively, the cushion 1 and the frame 2 are separate two parts, which are connected by a fit.

Alternatively, the cushion 1 and the frame 2 are of an integrally formed structure, i.e., they are formed as one piece, so that the cushion 1 and the frame 2 are integrated into one component.

As mentioned above, the various figures of the present invention illustrate embodiments in which the respiratory mask is a full-face mask, which is a mask that collectively covers the mouth and nose of a user and is intended for use by users in a mouth-opening breathing need.

It will be appreciated that the respiratory mask of the present invention may also be a nasal mask, an oral mask, or a nasal cushion mask, among other types of masks. Among these, nasal masks are masks that seal around only the nose of the user and press against the bridge of the nose. An oral mask is a mask that seals around the nose of a user and covers the mouth of the user. The nasal cushion mask is a mask that covers the bottom of the user's nose and seals around the user's nostrils, with a pair of protruding nasal pillows that intrude into the user's nostrils.

The utility model provides a specific implementation mode of a nasal mask, which comprises a frame, a gasket arranged on the inner side of the frame, a straight pipe arranged on the outer side of the frame and a bone beam arm arranged on the frame and used for being connected with a head band. The frame may also be provided with an air vent 331, and the arrangement of the air vent 331 and the noise reduction principle may all be in the manner of the above embodiments, which are not described herein again.

It should be understood that in the nasal mask, the arrangement of the exhaust holes 331 is limited by the space and shape of the exhaust, and thus may be configured to be arranged in an oval shape along the outer edge of the frame, and may be arranged in a plurality of circles of the exhaust holes 331, so as to achieve the purposes of rapid attenuation and diffusion of the exhaust air flow, no blow-by, reduction of exhaust noise, improvement of wearing comfort, simple molding process, and reduction of cost.

While the utility model has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the utility model not be limited to the particular embodiments disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides an exhaust subassembly for respirator for get rid of the gas of breathing mask interior patient's exhalation, its characterized in that includes inner wall, outer wall and the skew wall of setting between inner wall and outer wall, be equipped with the exhaust hole on the skew wall, the skew wall includes inboard and outside, the exhaust hole is in the area of inboard on the skew wall with the exhaust hole is in the area of the outside on the skew wall is different.

2. A discharge assembly according to claim 1, wherein the discharge holes are distributed in a single row in the geometrical extension of the inclined wall.

3. The exhaust assembly as recited in claim 1 wherein an area of an inner side of the exhaust hole on the sloped wall is greater than an area of an outer side of the exhaust hole on the sloped wall.

4. The exhaust assembly as recited in claim 1 wherein an area of an inner side of the exhaust hole on the sloped wall is smaller than an area of an outer side of the exhaust hole on the sloped wall.

5. The exhaust assembly as recited in claim 1, wherein the exhaust direction of the exhaust hole has a second angle θ with the plane of the exhaust side of the sloped wall.

6. The exhaust assembly of claim 5, wherein the second included angle θ is 70 ° -90 °.

7. The exhaust assembly according to any one of claims 1 to 6, wherein the number of the exhaust holes is plural, and the exhaust direction of each exhaust hole is a direction of a line connecting a midpoint of an upper end surface of the exhaust hole and a midpoint of a lower end surface of the exhaust hole.

8. An exhaust assembly according to any of claims 1 to 6, wherein the exhaust aperture is oblong, oval, circular, rectangular, shaped with sharp corners or a configuration of at least two straight lines in parallel with at least one arc connecting two straight lines.

9. A vent assembly according to any one of claims 1 to 6, wherein the vent holes are arranged in a diverging manner, and the number of vent holes adjacent to each vent hole is at most 2.

10. The exhaust assembly of claim 9, wherein the exhaust holes are annularly distributed.

11. A discharge assembly according to any of claims 1 to 6, wherein the wall thickness of the discharge assembly is 0.8-1.2 mm.

12. A vent assembly according to any of claims 1-6, wherein the wall thickness of the vent assembly is equal to the hole depth of the vent hole.

13. The exhaust assembly according to any one of claims 1-6, wherein the inner wall is configured as a portion of a frame or a cushion of the respiratory mask when the exhaust assembly is disposed on the frame or the cushion.

14. A vent assembly according to any one of claims 1-6, wherein the outer wall is configured as part of a frame or a cushion of the respiratory mask when the vent assembly is disposed on the frame or the cushion.

15. A respiratory mask comprising a mask body and an exhaust assembly according to any one of claims 1-14, an interior side of the mask body for contacting a user's face, the exhaust assembly being disposed on an exterior side of the mask body, gas within the interior side of the mask body being expelled outwardly through the exhaust assembly.

16. The respiratory mask of claim 15, wherein a plane where the outer side of the mask body joins the first side of the exhaust assembly is a mating plane, and wherein the second side of the exhaust assembly forms a first included angle β with the mating plane.

17. A facial mask according to claim 16, wherein said first included angle β is 30 ° -70 °.

18. The respiratory mask of claim 15,

the distribution of the exhaust holes is in accordance with the outer contour shape of the exhaust component.

19. A respiratory mask according to any one of claims 15-18, further comprising a vent line including a flexible hose or elbow to which the second side of the exhaust assembly is connected.

20. A respirator as set forth in claim 19 wherein said second side of said exhaust assembly is provided with a mounting portion which forms a revolute or spherical pair connection with said flexible hose.

21. A respiratory mask according to claim 20, wherein the mounting portion is configured as a mounting hole, an inner wall of the mounting hole being provided with a first protrusion for mating with an outer wall of the flexible tube;

22. A respiratory mask according to claim 21, wherein the first side of the exhaust assembly is provided with a mounting post having an annular recess in an outer wall thereof for mating with the mask body;

23. A respirator as set forth in claim 22 wherein said mounting post further defines on an outer wall thereof a rotation stop projection configured as a projection structure on said annular recess extending axially of said exhaust assembly,

24. The respiratory mask according to any one of claims 15-18, wherein the vent assembly further comprises an air chamber in communication with the chamber within the mask body and the vent hole, respectively, the air chamber being configured to be large at one end and small at the other end.

25. The respiratory mask of claim 24, wherein the air chamber is an annular chamber surrounding a circumference of the exhaust assembly; or the air cavity is a groove body arranged at intervals along the circumferential direction of the exhaust assembly.

26. The respiratory mask according to any one of claims 15-18, wherein the mask body comprises a cushion and a frame, the cushion and the frame being connected by a fit, or the cushion and the frame being of unitary construction.

27. A respiratory mask according to claim 26, wherein the exhaust assembly and the frame are configured to be connected by a direct fixed connection, connected by a mating connection, or formed by an integral construction.

28. The respiratory mask of any one of claims 15-18, wherein the respiratory mask is one of a full face mask, a nasal mask, an oral mask, or a nasal cushion mask.