CN111110974A

CN111110974A - Flow adjusting device and flow-adjustable breathing mask

Info

Publication number: CN111110974A
Application number: CN201911408504.6A
Authority: CN
Inventors: 何垄; 周明钊; 庄志
Original assignee: BMC Medical Co Ltd
Current assignee: BMC Medical Co Ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-05-08
Also published as: WO2021136479A1

Abstract

The invention relates to a flow adjusting device and a breathing mask with adjustable flow, relates to the technical field of ventilation treatment, and is used for solving the technical problem that the exhaust flow of the breathing mask cannot be adjusted. The breathing mask with adjustable flow comprises a liner, a frame and a bent pipe, wherein the frame is provided with an adjusting device, and the opening area of an exhaust passage on the frame is changed through the adjusting device, so that the aim of changing the exhaust flow is fulfilled, and the breathing mask can meet the requirements of various types of breathing machines and diversified use environments.

Description

Flow adjusting device and flow-adjustable breathing mask

Technical Field

The invention relates to the technical field of ventilation treatment, in particular to a flow adjusting device and a flow-adjustable breathing mask.

Background

Noninvasive positive pressure ventilation has been widely used for Obstructive Sleep Apnea (OSA), chronic obstructive pulmonary emphysema (COPD), and the like, without the need for surgically inserting a tube into the patient's airway, using a blower to deliver a continuous pressure ventilation (CPAP) or a variable pressure ventilation, such as a bi-level pressure that varies with the patient's respiratory cycle or an autoregulated pressure that varies with the monitored condition of the patient, through tubing and a patient interface. This pressure-supported therapy is also commonly used for treatments such as obstructive sleep hypopnea, Upper Airway Resistance Syndrome (UARS), or congestive heart failure.

Non-invasive ventilation therapy includes interface devices on the face of a patient that are generally classified into four different contact patterns: a nasal mask covering only the nose, an oral mask covering only the mouth, an oral-nasal mask (also called a full face mask) covering the mouth and the nose, and a nasal cushion mask inserted into the nostrils. During treatment, an external blower is a pressure support device, such as a ventilator, and a patient interface couples the pressure of the gas provided by the ventilator to the patient's airway to deliver a flow of breathing gas to the patient's airway.

The full face mask can be divided into a face mask with exhaust and a face mask without exhaust according to different exhaust modes. The exhaust mask is provided with a special exhaust hole at the mask end so as to facilitate the exhaust of the breathing waste gas, and is mainly used in the household environment. The waste respiratory gas without exhaust mask is usually exhausted from the pipeline or the end of the respirator, and is mostly used in medical environment.

In most cases the treatment of the patient is chronic. The patient uses the no mask of arranging to treat under the hospital environment, need purchase the face mask of arranging of family expenses in addition after the discharge, can't continue to use medical no mask of arranging. With exhaust masks, there are again a high flow mask and a low flow mask, depending on the amount of exhaust at a nominal pressure (e.g., 12 hpa). The high-flow mask has the advantages of facilitating the discharge of breathing waste gas; the low flow mask has the advantages of stable performance and low exhaust noise. Under different use environments, masks with different flow rates matched with a respirator need to be selected.

Existing full-face masks are generally classified into two types of masks, one type of mask suitable for use in a domestic environment (as shown in fig. 26), and one type of mask suitable for use in a medical environment (as shown in fig. 27). The difference between these two masks is whether the mask has an exhaust. A vented mask suitable for use in a domestic environment is generally composed of a mask body 1 'and an elbow 2'. The mask body 1 comprises an exhaust aperture 11, and the exhaust aperture 11 exhausts the exhaust gas exhaled by the patient when the mask is in use. Of course, the exhaust apertures 11 can also be arranged on the elbow 2' to be suitable for the exhaust mask in the domestic environment, and the exhaust flow rate is determined by the exhaust apertures 11.

The non-exhaust mask suitable for medical environment consists of a mask main body 1 'and an elbow pipe 2'. Neither the mask body 1 'nor the elbow 2' has an exhaust structure. In use of the mask, exhaust gases exhaled by the patient are exhausted from the conduit or ventilator end.

Therefore, the existing breathing mask with single exhaust flow cannot meet the requirements of various types of breathing machines and diversified service environments.

Disclosure of Invention

The invention provides a breathing mask with adjustable flow, which is used for solving the technical problem that the exhaust flow of the breathing mask cannot be adjusted.

According to a first aspect of the present invention, there is provided a flow rate regulating device comprising a first vent and a second vent and an intermediate member disposed between the first vent and the second vent, an exhaust passage being provided between the intermediate member and the first vent and/or the second vent, the area of the exhaust passage being variable.

In one embodiment, the intermediate member is rotatably connected to the first ventilation member or the second ventilation member, and when the intermediate member rotates, the relative position between the intermediate member and the first ventilation member or the second ventilation member changes to change the area of the exhaust passage.

In one embodiment, the intermediate piece is slidably connected with the first vent or the second vent; when the intermediate member slides, the relative position between the intermediate member and the first ventilation member or the second ventilation member is changed, so that the area of the exhaust passage is changed.

In one embodiment, when the intermediate member rotates, the relative position between the intermediate member and the first vent or the second vent is periodically changed, so that the area of the exhaust passage is periodically changed.

According to a second aspect of the present invention, there is provided a flow adjustable respiratory mask comprising a cushion, a frame, and an elbow; the gasket is arranged on the frame and forms an air-through cavity with the frame; the elbow is connected with the frame, the breathing mask also comprises the flow regulating device,

wherein the frame is one of the first and second vents and the elbow is the other of the first and second vents.

According to a third aspect of the present invention, there is provided a flow adjustable respiratory mask, a cushion, a frame, and an elbow; the gasket is arranged on the frame and forms an air-through cavity with the frame; the elbow is connected to the frame, the respirator further includes:

the regulating device is used for changing the opening area of the exhaust passage so as to change the exhaust flow.

In one embodiment, the adjustment device is provided on the frame,

the adjusting device comprises an intermediate piece rotatably arranged between the frame and the elbow, the exhaust channel is an exhaust gap arranged between the frame and the intermediate piece and/or between the intermediate piece and the elbow, and when the intermediate piece rotates along the circumferential direction of the intermediate piece in a preset direction, the width of the exhaust gap between the intermediate piece and the frame and/or between the intermediate piece and the elbow changes periodically.

In one embodiment, the intermediate member includes a plurality of clamping platforms arranged along a circumferential direction of the intermediate member, the frame includes a plurality of outer bosses arranged outside the frame and arranged along the circumferential direction of the frame, the clamping platforms and the outer bosses cooperate to form the exhaust gap, and when the intermediate member rotates in a predetermined direction along the circumferential direction thereof, a relative position between the clamping platforms and the outer bosses is changed to periodically change a width of the exhaust gap.

In one embodiment, the heights of the plurality of clamping platforms and the plurality of outer bosses are periodically changed along a predetermined direction, and the height change rule of the plurality of outer bosses is opposite to the height change rule of the plurality of clamping platforms.

In one embodiment, the intermediate member further includes a plurality of clips disposed at intervals in a circumferential direction of the intermediate member, the frame includes a plurality of inner bosses disposed inside the frame and disposed in the circumferential direction of the frame, and the plurality of clips cooperate with the plurality of inner bosses to limit a degree of freedom of insertion and extraction of the intermediate member in the axial direction.

In one embodiment, the thickness of the plurality of buckles and the height of the plurality of inner bosses are periodically changed along a predetermined direction, and the thickness change rule of the plurality of buckles and the height change rule of the plurality of inner bosses are opposite.

In one embodiment, a connection pipe column is arranged between the buckle and the clamping platform, a connection hole is arranged on the frame and is communicated with the inner side and the outer side of the frame, the inner boss and the outer boss are respectively arranged at the inner side end and the outer side end of the connection hole, the connection pipe column is penetratingly arranged in the connection hole,

the exhaust gap comprises a gap front section defined by the outer wall of the connecting pipe column and the inner wall of the connecting hole and a gap rear section defined by a fit clearance between the clamping table and the outer boss,

when the intermediate member is rotated in a predetermined direction in the circumferential direction thereof, the width of the rear section of the slit is periodically changed.

In one embodiment, the outside of the frame is further provided with an identification area.

In one embodiment, the adjusting device further includes a shifting tool, a rotation groove is formed on an outer end surface of the intermediate member, and the shifting tool is inserted into the rotation groove to rotate the intermediate member in a predetermined direction along a circumferential direction thereof.

In one embodiment, the exhaust passage is an exhaust aperture, and the adjustment device includes an exhaust baffle plate covering the exhaust aperture, the exhaust baffle plate being slidably coupled to the frame to vary the number of exhaust apertures covered.

Compared with the prior art, the invention has the advantages that: the open area of the exhaust channel on the frame is changed through the adjusting device, so that the aim of changing the exhaust flow is fulfilled, and the breathing mask can meet the requirements of various types of breathing machines and diversified use environments.

Drawings

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

FIG. 1a is an exploded view of a flow regulating device in one embodiment of the present invention;

FIG. 1b is an exploded view of a flow regulating device in another embodiment of the present invention;

FIG. 1c is an exploded view of a flow regulating device in accordance with yet another embodiment of the present invention;

FIG. 2a is an exploded view of a flow adjustable respiratory mask in accordance with one embodiment of the present invention;

FIG. 2b is an exploded view of a flow adjustable respiratory mask according to another embodiment of the present invention;

FIG. 2c is an exploded view of a flow adjustable respiratory mask according to yet another embodiment of the present invention;

FIG. 3a is a schematic perspective view of a flow adjustable respiratory mask according to a first embodiment of the present invention;

FIG. 3b is an exploded view of the adjustable flow respirator shown in FIG. 3 a;

FIGS. 4a and 4b are schematic perspective views of the intermediate member shown in FIG. 3 a;

FIG. 5 is a schematic diagram of a cycle period of the middleware shown in FIG. 3 a;

FIG. 6 is a front view of the intermediate member shown in FIG. 3 a;

FIG. 7 is a cross-sectional view at A-A of FIG. 6;

FIG. 8a is a top view of the intermediate member shown in FIG. 3 a;

FIG. 8b is an expanded view of the intermediate member shown in FIG. 8 a;

FIG. 8c is a schematic view of the height change of the intermediate member during the first cycle period shown in FIG. 8 a;

FIG. 9 is a front view of the frame shown in FIG. 3 a;

FIGS. 10 and 11 are schematic perspective views of the frame of FIG. 3 a;

FIG. 12 is an enlarged view of FIG. 10 at B;

FIG. 13 is an enlarged view of FIG. 11 at C;

FIG. 14a is a partial cross-sectional view of the frame shown in FIG. 9;

FIG. 14b is an expanded view of the frame shown in FIG. 14 a;

FIG. 14c is a schematic view of the change in height of the chuck during the first cycle period shown in FIG. 14 b;

FIG. 15 is a front view of the adjustable flow respiratory mask of FIG. 3 a;

FIG. 16 is a partial cross-sectional view of FIG. 15 at D-D;

FIG. 17a is an enlarged view of FIG. 16 at E;

FIG. 17b is a partial cross-sectional view of the respirator with the shift position at 3;

FIG. 18a is a partial cross-sectional view of the intermediate piece and frame of the adjustable flow rate respiratory mask of FIG. 3a in the "0" position;

FIG. 18b is an expanded view of FIG. 18 a;

FIG. 19a is a partial cross-sectional view of the intermediate piece and frame of the adjustable flow rate respiratory mask of FIG. 3a in the "1" position;

FIG. 19b is an expanded view of FIG. 19 a;

FIG. 20a is a partial cross-sectional view of the intermediate piece and frame of the adjustable flow rate respiratory mask of FIG. 3a in the "2" position;

FIG. 20b is an expanded view of FIG. 20 a;

FIG. 21a is a partial cross-sectional view of the intermediate piece and frame of the adjustable flow rate respiratory mask of FIG. 3a in the "3" position;

FIG. 21b is an expanded view of FIG. 21 a;

FIG. 22 is a schematic perspective view of a shift tool according to an embodiment of the present invention;

FIG. 23 is a schematic diagram illustrating a use status of a shifting tool according to an embodiment of the present invention;

FIG. 24 is a schematic perspective view of a flow adjustable respiratory mask according to the second embodiment;

FIG. 25 is a schematic view of an orientation definition for a flow adjustable respiratory mask in an embodiment of the present invention;

fig. 26 and 27 are perspective views of prior art masks.

FIGS. 1-2 illustrate the drawings:

101,201, 301-a first venting member; 102,202, 302-a second vent; 103,203,303-middleware; 101a,201a,301 a-scaffold; 101b,201b,301 b-adapter; 1-forehead pad; 2-a liner; 3-a frame; 5-bending the pipe;

FIGS. 3-25 illustrate the drawings:

1-forehead pad; 2-a liner; 3-a frame; 4-middleware; 5-bending the pipe; 6-gear shifting tool; 7-an exhaust baffle; 31-forehead support region; 32-a frame body; 33-headgear buckles; 34-a connection hole; 35-exhaust orifice; 321-rotation identification; 322-gear identification;

341-inner boss; 342-an inner wall; 343-outer bosses; 3411-an inner tread; 3431-outer tread; 41-buckling; 411-a first side;

42-a clamping table; 421-a second side; 43-indicates an arrow; 44-a rotating trough; 45-connecting the pipe column; 46-a flange;

61-gear shifting probe; 62-gear shifting handle;

FIGS. 26 and 27 illustrate the drawings:

1' -a mask body; 2' -bending the tube; 11-exhaust hole.

Detailed Description

The invention will be further explained with reference to the drawings.

According to a first aspect of the present invention, there is provided a flow rate regulating device comprising a first vent and a second vent and an intermediate member disposed between the first vent and the second vent, wherein an exhaust passage is provided between the intermediate member and the first vent and/or the second vent, and the area of the exhaust passage can be changed to change the magnitude of the exhaust flow rate.

In the embodiment shown in fig. 1a, the first vent includes a bracket 101a and an adapter 101b, and the adapter 101b is connected to the bracket 101a in a matching manner or is integrally formed. The second ventilation member is an elbow 102, and the intermediate member 103 is rotatably connected to the adapter 101b and the elbow 102, respectively. When the intermediate member 103 rotates, its relative position with respect to the adapter 101b or the elbow 102 changes to change the area of the exhaust passage.

In the embodiment shown in fig. 1b, the first vent includes a bracket 201a and an adapter 201b, and the adapter 201b is connected to the bracket 201a in a matching manner or is integrally formed. In this embodiment, the second ventilator 202 and the middle part 203 are integrally formed into a cylindrical structure, that is, the middle part 203 is the front part of the cylindrical structure rotatably connected to the adapter 201b, and the second ventilator 202 is the rear part of the cylindrical structure connected to the ventilator. When the cylindrical structure rotates, the relative position between the cylindrical structure and the adapter 101b changes, so as to change the area of the exhaust passage.

In the embodiment shown in fig. 1c, which is similar to the embodiment shown in fig. 1b, the first vent includes a bracket 301a and an adapter 301b, and the adapter 301b is connected to the bracket 301a in a fitting manner or is integrally formed with the bracket 301 a. The second vent 302 and the intermediate member 303 are also formed integrally into a cylindrical structure. However, unlike the embodiment shown in FIG. 1b, the diameter of the rear end of the second venting member 302 is smaller, and when the second venting member is connected to a ventilator, the tubing of the ventilator is sleeved on the second venting member 302.

Further, when the intermediate member 103,203,303 rotates, the relative position between the intermediate member and the first ventilation member 101,201,301 or the second ventilation member 102,202,302 changes periodically, so that the area of the exhaust passage changes periodically.

The three embodiments described above are merely examples, and it will be understood that the assembly of the adapter and the intermediate piece may be adapted as a stand-alone flow regulating device to a device requiring flow regulation. For example, the adapter has two ends, one end of which is connected to the intermediate piece and the other end of which is a first adapter end that communicates with other vents (including but not limited to the frame). Likewise, the intermediate member also has two ends, the opposite end to which the adapter is connected being a second fitting end that can be fitted with other vents (including but not limited to a frame).

Illustratively, the first adapter end of the adapter is connected to the elbow and the second adapter end of the intermediate piece is connected to the air intake line, or the adapter and the intermediate piece are integrally disposed as an assembly at a predetermined air exhaust location on the frame, and the second adapter end does not have a second vent piece in communication, so at this time, the second adapter end is a closed end.

Further, in other embodiments, the intermediate piece is slidably connected to the first vent or the second vent; when the intermediate member slides, the relative position between the intermediate member and the first vent member or the second vent member is changed to change the area of the exhaust passage.

According to a second aspect of the invention, as shown in fig. 2a-2c, the invention provides a flow adjustable respiratory mask comprising a cushion 2, a frame 3 and an elbow 5; the pad 2 is arranged on the frame 3 and forms an air-through cavity with the frame 3; the elbow 5 is connected to the frame 3, the breathing mask further comprises the above-mentioned flow regulating means,

wherein the frame 3 is one of said first and second vents 101,201,301, 102,202,302 and the elbow 5 is the other of said first and second vents 101,201,301, 102,202, 302.

In the embodiment shown in fig. 2a, the frame 3 is said first venting member 101 and the elbow 5 is said second venting member 102; in the embodiment shown in fig. 2b, the frame 3 is a first vent 201 and the elbow 5 is a second vent 202, which is formed integrally with an intermediate piece 203; in the embodiment shown in fig. 2c, the frame 3 is a first venting member 301 and the elbow 5 is a second venting member 302, which is integrally formed with an intermediate member 303.

According to a third aspect of the present invention, as shown in fig. 3a and 3b, the present invention provides a flow adjustable respiratory mask comprising a cushion 2, a frame 3 and an elbow 5; the forehead cushion 1 is arranged at the upper part of the inner side of the frame 3 and is used for contacting with the forehead of a user, and the cushion 2 is arranged on the frame 3 and forms an air-through cavity with the frame 3; the elbow 5 is connected to the frame 3, for example the elbow 5 is rotatably connected to the frame 3. The frame 3 is provided with an adjusting device and an exhaust channel, the exhaust channel is communicated with the ventilation cavity, and the adjusting device is used for changing the opening area of the exhaust channel on the frame 3 so as to change the exhaust flow.

It is understood that the larger the area of the exhaust passage opening, the larger the exhaust flow rate; the smaller the area of the exhaust passage opening, the smaller the exhaust flow rate.

The present invention provides a detailed description of the structure and principles of the adjustment device by the following different embodiments.

Example one

In the present embodiment, the adjusting means includes an intermediate member 4 rotatably provided between the frame 3 and the elbow pipe 5, the exhaust passage is an exhaust gap provided between the frame 3 and the intermediate member 4, and when the intermediate member 4 is rotated in a predetermined direction in its circumferential direction, the width of the exhaust gap between the intermediate member 4 and the frame 3 is changed so that the area where the exhaust passage is opened is periodically changed.

Wherein the predetermined direction may be a clockwise rotation direction as shown in fig. 25. When the intermediate member 4 rotates, the axial relative position between it and the frame 3 changes, thereby changing the area of the exhaust passage opening to change the exhaust flow rate.

In the present exemplary embodiment, the intermediate piece 4 is connected rotatably to the frame 3, and the intermediate piece 4 is connected rotatably or fixedly to the tube 5.

It should be noted that the area of the exhaust passage opening may be periodically changed to be periodically increased or decreased.

Specifically, referring to fig. 4a, 13 and 17b together, the exhaust passage is an exhaust slit, wherein the exhaust slit comprises a slit front end 100 and a slit rear end 200 (as shown in fig. 17b, wherein fig. 17b is a partial sectional view of the breathing mask when the shift position is 3-position). The intermediate piece 4 is arranged in the frame 3, and the axial dimension of the intermediate piece 4 is slightly smaller than the axial dimension of the frame 3 where the intermediate piece 4 is mounted, so that there is a certain gap, i.e. a gap front section 100, between the intermediate piece 4 and the frame 3 in the axial direction. .

Further, the middle part 4 includes a plurality of clamping platforms 42 arranged along the circumference of the middle part 4, the frame 3 includes a plurality of outer bosses 343 arranged outside the frame 3 and arranged along the circumference of the frame 3, and the clamping platforms 42 and the outer bosses 343 cooperate to form the gap rear section 200. When the intermediate member 4 is rotated in a predetermined direction in the circumferential direction thereof, the size of the slit front section 100 does not change, but the relative position between the catch 42 and the outer boss 343 changes so that the width of the slit rear section 200 changes periodically. Since one end of the front gap section 100 is communicated with the inner side of the frame 3, the other end is communicated with the rear gap section 200, and the rear gap section 200 is communicated with the outside, the width change of the rear gap section 200 can change the exhaust flow.

Further, the heights of the plurality of stages 42 and the plurality of outer bosses 343 each vary periodically in a predetermined direction, and the height variation rule of the plurality of outer bosses 343 is opposite to the height variation rule of the plurality of stages 42. For example, the heights of the plurality of clamping platforms 42 are periodically decreased and then increased along the clockwise direction, and the heights of the plurality of outer bosses 343 are periodically increased and then decreased along the clockwise direction.

In addition, the intermediate member 4 further includes a plurality of buckles 41, the plurality of buckles 41 are arranged at intervals along the circumferential direction of the intermediate member 4, the frame 3 includes a plurality of inner bosses 341 arranged inside the frame 3 and arranged along the circumferential direction of the frame 3, and the plurality of buckles 41 and the plurality of inner bosses 341 cooperate to limit the degree of freedom of insertion and extraction of the intermediate member 4 in the axial direction.

Further, referring to fig. 12, the thickness of the plurality of hooks 41 and the height of the plurality of inner protrusions 341 periodically change along a predetermined direction, and the thickness change rule of the plurality of hooks 41 and the height change rule of the plurality of inner protrusions 341 are opposite. For example, the thickness of each of the plurality of catches 41 periodically decreases in the clockwise direction, and the height of each of the plurality of inner bosses 341 periodically increases in the clockwise direction.

The term "plurality" as used herein means two or more.

The present invention will be described in detail below by taking an example in which the number of the snap 41 and the inner boss 341 is 4, and the number of the snap 42 and the outer boss 343 is 16.

First, the middleware 4 having 4 snaps 41 and 16 stands 42 will be described.

The variation cycle of the thickness or height thereof is set to 4 based on the number of the snaps 41 and the catches 42. As shown in fig. 5, the intermediate member 4 has 4 cycle periods, each of which has an angle of 90 °.

As shown in fig. 4a-7, the intermediate member 4 is cylindrical, one end of which is a flange 46, the other end of which is a connecting column 45, the inner side of the flange 46 is provided with a plurality of clamping platforms 42, and the plurality of clamping platforms 42 are in a step shape. As shown in fig. 4a, the inner end surface of the locking platform 42 is a second side surface 421, and the second side surface 421 is a sector and is an inclined spiral surface with a central angle of 22.5 °. The second side 421 is for mating with the outer protrusion 343, the mating relationship of which will be described in detail below.

The outer wall of the connecting stub 45 is provided with 4 catches 41 at equal intervals. It will be understood that, in a radial section of the intermediate piece 4, the central angle of the catch 41 is 45 °. The outer side of the catch 41 is a first side 411 which is an inclined spiral surface so that the thickness of the catch 41 periodically decreases in the clockwise direction. The presence of the first side 411 allows the intermediate member 4 to move within a certain range in the axial direction.

In order to clearly illustrate the structure and variations of the clasp 41 and the catch 42, the present invention provides an expanded view of the outer side of the intermediate member 4, as shown in fig. 8a and 8 b. As can be seen from fig. 8b, during each cycle, the thickness of the latch 41 (i.e., the distance along the Y-axis shown in fig. 8 b) gradually decreases along the positive X-axis direction, and the height of the latch 42 (i.e., the distance along the Y-axis shown in fig. 8 b) first decreases and then increases along the positive X-axis direction.

As shown in fig. 8c, taking the first cycle as an example, there are 4 chucks 42 in the first cycle, and the inner side end surfaces of the 4 chucks 42 are the second side surface 421a, the second side surface 421b, the second side surface 421c, and the second side surface 421d, respectively. The height of the chuck 42 decreases from the second side 421a to the second side 421 b; and the height of the chuck 42 increases from the second side 421b to the second side 421c to the second side 421 d. In other words, during the first cycle, the height of the chuck 42 is first decreased and then increased. The provision of the first height-reduced abutment 42 ensures that at least one second side 421 fits closely with an outer step 3431 of the outer projection 343 during each cycle when the abutment 42 fits the outer projection 343, so that the frame 3 axially supports the intermediate member 4.

In the second cycle period, the third cycle period, and the fourth cycle period, the height variation of the chuck 42 is the same as that in the first cycle period, and thus, the description thereof is omitted.

It will be appreciated that the clockwise direction is the positive direction shown by the X-axis in figure 8 b.

As shown in fig. 8b, the first side 411 is an inclined spiral surface, and the second side 421 is also an inclined spiral surface, and the inclined directions are different. The intermediate member 4 is thereby rotated in the clockwise direction so that it can be moved in the axial direction within a specified range, thereby changing the relative position with respect to the frame 3.

Preferably, the flange 46 is also provided on its outer end face with an indication arrow 43, which indication arrow 43 points towards a gear indicator 322 on the frame 3 indicating a gear when the intermediate piece 4 is rotated. Since 4 cycle periods are provided in this embodiment, the indication arrow 43 is provided at intervals of 90 ° by 4.

The frame 3 having 4 inner bosses 341 and 16 outer bosses 343 will be described in detail below.

As shown in fig. 9 to 13, the frame 3 includes a forehead support region 31 connected to the forehead pad 1, a frame main body 32 connected to the forehead support region 31, headband buckles 33 provided at both sides of the frame main body 32, and an elbow joint region provided on the frame main body 32. The elbow joint region is configured as a connecting hole 34 connecting the inner side and the outer side of the frame 3, the outer side of the connecting hole 34 is provided with an outer boss 343, and the inner side thereof is provided with an inner boss 341.

The connecting stub 45 of the intermediate member 4 is penetratingly disposed in the connecting hole 34 so that the outer side of the catch 41, i.e., the first side surface 411 is engaged with the end surface of the inner boss 341; while the inner side of the catch 42, i.e., the second side 421, is engaged with the end surface of the outer projection 343, so that the intermediate member 4 is rotatably disposed in the coupling hole 34 of the frame 3.

It is understood that, in order to correspond to the snap 41, the inner bosses 341 are also provided in 4; the outer bosses 343 are also provided in 16 pieces so as to correspond to the chucking stages 42. The cycle period of the inner boss 341 and the outer boss 343 coincides with the cycle period mentioned above.

In addition, an end surface of the inner boss 341, i.e., the inner stepped surface 3411 (shown in fig. 12), is configured as an inclined spiral surface, which is engaged with the first side surface 411, so that the thickness of the inner boss 341 is periodically increased in the clockwise direction.

The end surface of the outer protrusion 343, i.e., the outer step surface 3431 (shown in fig. 13), is also configured as an inclined spiral surface which cooperates with the second side surface 421, and the central angle of the outer step surface 3431 is likewise 22.5 °. Since the plurality of catches 42 are stepped in a shape that periodically decreases first and then increases in the clockwise direction, the plurality of outer protrusions 343 are stepped in a shape that periodically increases first and then decreases in the clockwise direction in order to be engaged therewith.

It will be appreciated that there must be a particular position (i.e., the "0" position described below) in which the 16 outer projections 343 are in full abutting contact with the corresponding 16 abutments 42; if the intermediate member 4 is rotated in this position, there must be some positions (i.e., the "3" gear position, "the" 2 "gear position, and the" 1 "gear position described below), and the 16 outer protrusions 343 are not tightly fitted to the corresponding 16 catches 42, respectively, but have some play.

When the connection pipe column 45 is inserted into the connection hole 34, the end surface of the inner boss 341, i.e., the inner stepped surface 3411, is engaged with the first side surface 411; and the end surface of the outer boss 343, i.e., the outer step surface 3431, is engaged with the second side surface 421, the freedom of insertion and removal of the intermediate member 4 in the axial direction is restricted but it can rotate in the axial direction. Since the mating surfaces are all inclined spiral surfaces, the intermediate member 4 is displaced in the axial direction relative to the frame 3 during the rotation of the intermediate member 4, thereby changing the area of the exhaust gap.

In order to clearly describe the structure and the variation of the outer boss 343 and the inner boss 341, the present invention provides an expanded view of the inner side of the connecting hole 34, as shown in fig. 14a and 14 b. As can be seen from fig. 14b, the height of the inner boss 341 (i.e., the distance in the Y-axis direction shown in fig. 14 b) gradually increases in the X-axis positive direction (opposite to the change in the thickness of the catch 41), while the height of the outer boss 343 (i.e., the distance in the Y-axis direction shown in fig. 14 b) increases and then decreases in the X-axis positive direction (opposite to the change in the height of the catch 42) at each cycle.

As shown in fig. 14c, taking the first cycle as an example, in the first cycle, there are 4 outer bosses 343, and end faces of the 4 outer bosses 343 are an outer step 3431a, an outer step 3431b, an outer step 3431c, and an outer step 3431d, respectively. The height of the outer boss 343 increases as viewed from the outer step 3431a to the outer step 3431 b; and the height of the outer boss 343 is reduced from the outer step 3431b to the outer step 3431c to the outer step 3431 d.

In the second cycle period, the third cycle period, and the fourth cycle period, the height variation of the outer protrusion 343 is the same as the height variation in the first cycle period, and thus, the details thereof are not repeated.

It will be appreciated that in a particular position (i.e., the "0" gear position described below), the outer step surface 3431a, the outer step surface 3431b, the outer step surface 3431c and the outer step surface 3431d are in close contact with the second side surface 421a, the second side surface 421b, the second side surface 421c and the second side surface 421d, respectively, as shown in fig. 18b, and the width of the rear section 200 of the slit is zero, i.e., no air can be exhausted to the outside.

It will be appreciated that the clockwise direction is the positive direction shown by the X-axis in figure 14 b.

In addition, as shown in fig. 9, the frame body 32 is provided with a mark area on the outer side adjacent to the connection hole 34, and the mark area is provided with a rotation mark 321 and a shift mark 322, respectively. The rotation indicator 321 is used to indicate the rotation direction of the intermediate member 4, and the gear indicator 322 is used to indicate the magnitude of the exhaust gas flow rate.

Here, the rotation indicator 321 may be any shape such as an arrow that can indicate a rotation direction. It should be noted that the middleware 4 can only rotate in the direction indicated by the rotation indicator 321, but cannot rotate reversely. The gear position indicator 322 may be a character with a characteristic size, such as an arabic numeral, an ancient roman numeral, or a chinese character, or may be a graph with a characteristic size, such as a circle with different sizes, a polygon with different numbers of corners, or the like. The invention is not limited in this regard.

As shown in fig. 9, the direction indicated by the rotary flag 321 is clockwise, and the gear position flags 322 are 0, 1,2, and 3, respectively.

It will be appreciated that when pointing to "0" of gear indicator 322 by pointer arrow 43, the corresponding exhaust flow is the smallest (i.e., 0, i.e., no exhaust mask), and when pointing to "3" of gear indicator 322, the corresponding exhaust flow is the largest (i.e., high flow mask).

Further, the rotary mark 321 and the gear mark 322 may be both convex with respect to the outer side surface of the frame body 32, and may also be concave with respect to the outer side surface of the frame body 32; the frame 3 and the mold can be molded together, and the later molding such as silk-screen printing, spraying and the like can also be performed. The invention is not limited in this regard.

It will be appreciated that the cycle period in the above embodiment is 4, and that rotating the intermediate member by 1 revolution (i.e. 360 °), the finger indication arrow 43 will have 4 chances of pointing to "3" gear, "2" gear, "1" gear and "0" gear, respectively.

The principle of the adjusting device of the present invention for adjusting the exhaust gas flow rate will be described in detail below.

As shown in fig. 15 to 21, the connection stem 45 is penetratingly disposed in the connection hole 34, the exhaust slit includes a slit front section 100 (shown in fig. 17a and 17 b) defined by an outer wall of the connection stem 45 and an inner wall 342 of the connection hole 34, and a slit rear section 200 (shown in fig. 17 b) defined by a fitting gap between the second side 421 of the chucking table 42 and the outer step 3431 of the outer protrusion 343, and a width of the slit rear section 200 periodically changes when the intermediate member 4 is rotated in a predetermined direction in a circumferential direction thereof.

Since the clips 41 of the intermediate member 4 are spaced apart (i.e., not connected to each other), the front slit segment 100 communicates with the inner chamber of the frame 3 in the spaced region between the clips 41. And the width of the front sipe section 100 does not change during the rotation of the intermediate piece 4 with respect to the frame 3. Therefore, the amount of exhaust flow is determined by the width of the rear slit section 200.

According to the different size of the width of the rear section 200 of the thin seam, the exhaust flow is divided into 4 gears, namely 0 gear, 1 gear, 2 gears and 3 gears. From 0 to 3, the higher the shift position, the larger the exhaust gas flow rate. Wherein, the 0 grade is a non-exhaust mask, and the 3 grade is a high-flow mask. The 4 gear positions are indicated by gear position indications 322 on the frame 3.

When the indication arrow 43 points to "0" of the gear indicator 322, the second side 421 is completely in sealing engagement with the end surface (outer step surface 3431) of the outer boss 343, and the area of the gap rear section 200 is 0, as shown in fig. 18a and 18b, wherein fig. 18b is a schematic view of the unfolded connection portion of the intermediate member 4 and the frame 3. That is, there is no exhaust at this time, and therefore the breathing mask can be used as a non-exhaust mask in a medical environment.

When the indication arrow 43 points to "3" of the gear position indication 322, the second side 421 and the end surface (outer step surface 3431) of the outer boss 343 are offset from each other to maximize the width of the rear slit section 200, as shown in fig. 21a and 21b, wherein fig. 21b is a schematic view of the unfolded connecting portion of the intermediate member 4 and the frame 3. In "3" gear, the respiratory mask is a high flow mask when in use.

When one of the indicating arrows 43 on the flange 46 points to the "3" gear, the intermediate member 4 is rotated by 22.5 ° in the clockwise direction (i.e., the number of degrees of the central angle of one of the catches 42), so that the indicating arrow 43 points to the "2" gear of the gear indicator 322. Since the mating surfaces of the first side surface 411 and the inner step surface 3411 are inclined spiral surfaces, the intermediate member 4 moves in the axial direction relative to the frame 3 during the clockwise rotation of the intermediate member 4, and the width of the thin slit rear section 200 between the second side surface 421 and the outer step surface 3431 becomes smaller, so that the exhaust gas flow rate becomes smaller, as shown in fig. 20a and 20b, where fig. 20b is a schematic view after the connection portion of the intermediate member 4 and the frame 3 is unfolded.

Further, in the "2" position, the intermediate member 4 is rotated further 22.5 ° clockwise (i.e., the number of degrees of the central angle of one of the chucks 42) so that the indication arrow 43 points to the "1" position of the position indicator 322. Since the mating surfaces of the first side surface 411 and the inner step surface 3411 are inclined helical surfaces, the intermediate piece 4 moves in the axial direction relative to the frame 3 during the clockwise rotation of the intermediate piece 4, and the width of the thin slit rear section 200 between the second side surface 421 and the outer step surface 3431 continues to decrease, as shown in fig. 19a and 19b, where fig. 19b is a schematic view after unfolding the connecting portion of the intermediate piece 4 and the frame 3. The exhaust flow is further reduced and the mask is a low flow mask when in use.

Further, in the "1" range, the intermediate member 4 is further rotated by 22.5 ° in the clockwise direction (i.e., the number of degrees of the central angle of one of the chucks 42), so that the indication arrow 43 points to the "0" range of the range indicator 322. Since the mating surfaces of the first side surface 411 and the inner step surface 3411 are inclined helical surfaces, the intermediate piece 4 moves in the axial direction relative to the frame 3 during the clockwise rotation of the intermediate piece 4, and the width of the thin gap rear section 200 between the second side surface 421 and the outer step surface 3431 continues to decrease until it becomes 0, at which time there is no exhaust gas, as shown in fig. 18a and 18 b.

Further, in the "0" range, the intermediate member 4 is rotated further 22.5 ° clockwise (i.e., the number of degrees of the central angle of one of the chucks 42) so that the indication arrow 43 points to the "3" range of the range indicator 322, as shown in fig. 21a and 21 b. If the rotation is continued, the exhaust gas flow volume will be switched in accordance with the rule of "3" range → "2" range → "1" range → "0" range described above.

The rotation direction of the intermediate member 4 is determined by the step height change of the catch 42 and the inclination direction of the first side 411 of the catch 41. For example, in the above embodiment, the intermediate member 4 can only rotate clockwise.

It will be appreciated that the number of degrees of rotation of the intermediate member 4 required for each gear adjustment is determined by the number of the abutments 42 and the number of cycles. For example, in the above embodiment, the number of the locking pieces 42 is set to 16 for 4 cycle periods, and therefore the number of degrees of rotation of the intermediate member 4 for each gear position is 22.5 °.

In order to prevent unintended shifting of gears during use of the breathing mask, the invention provides the following preferred embodiments. Specifically, the adjusting device further includes a shift tool 6, a rotation groove 44 is provided on an outer end surface of the intermediate member 4, and the shift tool 6 is inserted into the rotation groove 44 to rotate the intermediate member 4 in a predetermined direction in a circumferential direction thereof.

The shape of the rotation slot 44 may be any shape such as a circle, a triangle, a square, etc., and the shape of the rotation slot 44 is not limited in the present invention. For ease of adjustment, preferably, the rotation slots 44 are provided at intervals 90 in the circumferential direction, as shown in fig. 6.

Further, the present invention shows a preferred shifting tool 6. Specifically, the shifting tool 6 includes a shifting probe 61 and a shifting handle 62. The shift handle 62 serves as a hand-held support arm during shifting. In order to apply force uniformly, the number of the shift probes 61 is generally not less than 2, and the shape of the shift probes is consistent with that of the rotary groove 44.

As shown in fig. 23, 3 shift probes 61 are shown. When in use, the gear shifting probe 61 is inserted into the rotating groove 44, and the gear shifting handle 62 is held to rotate.

It will be appreciated that the direction of rotation of the gearshift tool 6 must be aligned with the direction of the rotation indication 321 on the frame 3, for example clockwise as in the above described embodiment.

In summary, the gist of the present example is to change the relative position between the middle piece 4 and the frame 3 by rotating the middle piece 4, so as to increase or decrease the area of the exhaust gap between the two, and further change the exhaust flow rate, so as to achieve the interconversion between the non-exhaust mask, the low-flow mask and the high-flow mask.

It is understood that the adjusting angle, the rotating direction, the gear setting and the implementing method of the adjusting angle are not limited to the above embodiments.

Example two

In this embodiment, different, same or similar components or parts from those in the first embodiment, such as the forehead pad 1, the cushion 2, the frame 3, the elbow 5, etc., will be mainly described, and will not be described in detail in this embodiment. It will be understood that the same components or parts of the present embodiment as those of the first embodiment can be directly used instead of or in combination without any technical obstacles.

The present exemplary embodiment differs from the first exemplary embodiment in that the exhaust gap is arranged between the intermediate piece 4 and the pipe bend 5, in which case the intermediate piece 4 can be connected fixedly to the frame 3 or can be connected rotatably, and the intermediate piece 4 can be connected adjustably to the pipe bend 5. The relative position of the middle part 4 and the elbow 5 is adjusted through the relative rotation between the two parts, thereby realizing the purpose of adjusting the exhaust flow.

Preferably, the intermediate member 4 is rotatably connected to the frame 3.

EXAMPLE III

The present embodiment is different from the first embodiment in that, in the present embodiment, as shown in fig. 24, the exhaust passage is an exhaust small hole 35, the adjusting device includes an exhaust baffle 7 covering the exhaust small hole 35, and the exhaust baffle 7 is slidably connected to the frame 3 to change the number of the covered exhaust small holes 35. The arrows shown in fig. 24 are the sliding directions of the exhaust baffle 7, and when sliding on the frame 3, the number of covered exhaust orifices 35 increases or decreases, thereby changing the exhaust flow of the breathing mask to switch between a non-exhaust mask, a low-flow mask and a high-flow mask.

The small vent holes described in the present invention are through holes having a hole diameter of 1mm or less.

The present invention is defined for the above-mentioned directions as follows:

the axial direction is the axial direction of the intermediate member 4, as shown in fig. 25; the clockwise direction is a circumferential direction when the intermediate member 4 is rotated with the axis thereof as a rotation axis, as shown in fig. 25; the outer side is the side of the breathing mask far away from the face of the user, and the inner side is the side of the breathing mask close to the face of the user.

It is understood that in the above embodiment, the number of the cycle periods is 4, but in actual practice, the purpose can be achieved by an even number of (2,4,6 … …) cycle periods. In specific implementation, the number of the buckles 41 and the catches 42 on the intermediate member 4 may be adjusted accordingly, and the inner bosses 341 and the outer bosses 343 may be adjusted adaptively.

While the invention 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 invention. 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 invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A flow regulating device is characterized by comprising a first ventilating piece, a second ventilating piece and an intermediate piece arranged between the first ventilating piece and the second ventilating piece, wherein an exhaust passage is arranged between the intermediate piece and the first ventilating piece and/or the second ventilating piece, and the area of the exhaust passage can be changed.

2. The flow rate adjustment device according to claim 1, wherein the intermediate member is rotatably connected to the first vent member or the second vent member, and when the intermediate member is rotated, a relative position between the intermediate member and the first vent member or the second vent member is changed to change an area of the exhaust passage; or

The intermediate piece is slidably connected with the first vent piece or the second vent piece; when the intermediate member slides, the relative position between the intermediate member and the first ventilation member or the second ventilation member is changed, so that the area of the exhaust passage is changed.

3. The flow rate adjustment device according to claim 2, wherein the intermediate member periodically changes its relative position with respect to the first or second vent member when rotated, so that the area of the exhaust passage periodically changes.

4. A flow adjustable respiratory mask comprising a cushion (2), a frame (3) and an elbow (5); characterized in that the gasket (2) is arranged on the frame (3) and forms an air-through cavity with the frame (3); the elbow (5) being connected to the frame (3), characterized in that the breathing mask further comprises a flow regulating device according to any one of claims 1-3,

wherein the frame (3) is one of the first and second vents and the elbow is the other of the first and second vents.

5. A flow adjustable respiratory mask comprising a cushion (2), a frame (3) and an elbow (5); characterized in that the gasket (2) is arranged on the frame (3) and forms an air-through cavity with the frame (3); elbow (5) with frame (3) link to each other, respiratory mask still includes:

6. Breathing mask according to claim 5, wherein the adjustment means are provided on the frame (3),

the adjusting device comprises an intermediate piece (4) rotatably arranged between the frame (3) and the elbow (5), the exhaust channel is an exhaust gap arranged between the frame (3) and the intermediate piece (4) and/or between the intermediate piece (4) and the elbow (5), and when the intermediate piece (4) rotates along the circumferential direction thereof in a preset direction, the width of the exhaust gap between the intermediate piece (4) and the frame (3) and/or between the intermediate piece (4) and the elbow (5) changes periodically; or

The adjusting device comprises an exhaust baffle (7) which can be covered on the exhaust channel in a sliding mode, the exhaust channel is an exhaust small hole (35), and the number of the covered exhaust small holes (35) can be changed when the exhaust baffle (7) slides.

7. The adjustable flow respirator of claim 6, wherein the intermediate piece (4) comprises a plurality of catches (42) arranged along the circumference of the intermediate piece (4), the frame (3) comprises a plurality of outer bosses (343) arranged outside the frame (3) and arranged along the circumference of the frame (3), the catches (42) and the outer bosses (343) cooperate to form the exhaust gap, and when the intermediate piece (4) is rotated in a predetermined direction along the circumference thereof, the relative position between the catches (42) and the outer bosses (343) is changed to periodically change the width of the exhaust gap; and/or

The middle piece (4) further comprises a plurality of buckles (41), the buckles (41) are arranged at intervals along the circumferential direction of the middle piece (4), the frame (3) comprises a plurality of inner bosses (341) which are arranged on the inner side of the frame (3) and arranged along the circumferential direction of the frame (3), and the buckles (41) and the inner bosses (341) are matched to limit the inserting and pulling freedom degree of the middle piece (4) in the axial direction.

8. The flow-adjustable respiratory mask according to claim 7, wherein the heights of the plurality of the clamping platforms (42) and the plurality of the outer bosses (343) each vary periodically along a predetermined direction, and the height variation law of the plurality of the outer bosses (343) is opposite to the height variation law of the plurality of the clamping platforms (42); and/or

The thicknesses of the plurality of buckles (41) and the heights of the plurality of inner bosses (341) periodically change along a preset direction, and the thickness change rule of the plurality of buckles (41) is opposite to the height change rule of the plurality of inner bosses (341).

9. The respiratory mask according to claim 8, wherein a connection pipe column (45) is provided between the buckle (41) and the clamping platform (42), the frame (3) is provided with a connection hole (34) communicating the inner side and the outer side thereof, the inner boss (341) and the outer boss (343) are respectively provided at the inner end and the outer end of the connection hole (34), the connection pipe column (45) is penetratingly provided in the connection hole (34),

the exhaust gap comprises a gap front section (100) defined by the outer wall of the connecting pipe column (45) and the inner wall of the connecting hole (34) and a gap rear section (200) defined by the fit clearance between the clamping table (42) and the outer boss (343),

when the intermediate member (4) is rotated in a predetermined direction in the circumferential direction thereof, the width of the gap rear section (200) is periodically changed.

10. Flow adjustable breathing mask according to any of claims 5-9, wherein the frame (3) is further provided with identification areas on its outside; and/or

The adjusting device further comprises a gear shifting tool (6), a rotating groove (44) is formed in the end face of the outer side of the intermediate piece (4), and the gear shifting tool (6) can enable the intermediate piece (4) to rotate in the circumferential direction of the intermediate piece (4) in a preset direction after being inserted into the rotating groove (44).