Flow regulating device and flow adjustable respiratory mask

Abstract

The present application relates to a flow regulating device and a flow adjustable breathing mask, and relates to the technical field of ventilation therapy, which is used to solve the technical problem that the exhaust flow of the breathing mask cannot be regulated. The flow adjustable breathing mask of the present application comprises a gasket, a frame and an elbow pipe, the frame is provided with a regulating device, the area of the exhaust passage opening on the frame is changed through the regulating device, so as to achieve the purpose of changing the exhaust flow, and the breathing mask of the present application can meet various types of breathing machines and diversified use environments.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ventilation therapy, in particular to a flow regulating device and a flow adjustable respiratory mask. BACKGROUND

[0002] Non-invasive positive pressure ventilation has been widely used in obstructive sleep apnea (OSA), chronic obstructive pulmonary emphysema (COPD) and the like. Instead of inserting a tube into the airway of a patient through a surgical operation, a blower is used to deliver a continuous positive airway pressure (CPAP) or a variable pressure ventilation, such as a bi-level pressure varying with the breathing cycle of the patient or an auto-titration pressure varying with the monitoring condition of the patient, to the airway of the patient through a tube and a patient interface device. This pressure support therapy is also commonly used in, for example, obstructive sleep hypoventilation, upper airway resistance syndrome (UARS) or congestive heart failure.

[0003] Non-invasive ventilation therapy includes a patient interface device on the face of a patient. The patient interface device is generally classified into four types according to the contact mode: 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 nose, and a nasal cushion mask inserted into the nostrils. During the therapy, an external blower, such as a ventilator, is a pressure support device. The patient interface device connects the gas pressure provided by the ventilator to the airway of the patient to deliver the breathing gas flow to the airway of the patient.

[0004] The full-face mask can be classified into a mask with exhaust and a mask without exhaust according to the exhaust mode. The mask with exhaust has a dedicated exhaust hole at the end of the mask to exhaust the breathing waste gas, and is mainly used in a home environment. The breathing waste gas of the mask without exhaust is usually exhausted from the end of the tube or the ventilator, and is mainly used in a medical environment.

[0005] In most cases, the therapy of a patient is long-term. The patient uses the mask without exhaust in a hospital environment, and needs to additionally purchase the mask with exhaust for home use after being discharged from the hospital, and cannot continue to use the mask without exhaust for medical use. As for the mask with exhaust, it can be classified into a high-flow mask and a low-flow mask according to the exhaust amount at the rated pressure (for example, 12 hpa). The high-flow mask has the advantage of facilitating the exhaust of the breathing waste gas. The low-flow mask has the advantages of stable performance and low exhaust noise. In different use environments, the mask with different flow rates matched with the ventilator needs to be selected.

[0006] The existing full-face mask is generally classified into two types of masks. One is the mask with exhaust suitable for use in a home environment (as shown in FIG. 1), and the other is the mask without exhaust suitable for use in a medical environment (as shown in FIG. 2). Figure 26 Figure 27 ​The difference between the two masks is whether the mask has an exhaust device. The exhaust mask suitable for home environment is usually composed of a mask body 1' and an elbow 2'. The mask body 1' includes exhaust holes 11 which exhaust the waste gas exhaled by the patient when the mask is used. Of course, the exhaust holes 11 can also be arranged on the elbow 2' to adapt to the exhaust mask suitable for the home environment, and the exhaust flow rate is determined by the exhaust holes 11.

[0007] The exhaust mask suitable for medical environment is composed of a mask body 1' and an elbow 2'. Neither the mask body 1' nor the elbow 2' has an exhaust structure. When the mask is used, the waste gas exhaled by the patient is exhausted from the pipeline or the ventilator end.

[0008] Therefore, the existing single exhaust flow rate breathing mask cannot meet the multiple types of breathing machines and diversified use environments. SUMMARY

[0009] The present application provides a flow rate adjustable breathing mask, which is used to solve the technical problem that the exhaust flow rate of the breathing mask cannot be adjusted.

[0010] According to a first aspect of the present application, the present application provides a flow rate adjusting device, which includes a first ventilation member and a second ventilation member and an intermediate member arranged between the first ventilation member and the second ventilation member, and an exhaust passage is arranged between the intermediate member and the first ventilation member and / or the second ventilation member, and the area of the exhaust passage can be changed.

[0011] In one embodiment, the intermediate member is rotatably connected with 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.

[0012] In one embodiment, the intermediate member is slidably connected with the first ventilation member or the second ventilation member, and when the intermediate member slides, 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.

[0013] In one embodiment, when the intermediate member rotates, the relative position between the intermediate member and the first ventilation member or the second ventilation member changes periodically to periodically change the area of the exhaust passage.

[0014] According to a second aspect of the present application, the present application provides a flow rate adjustable breathing mask, which includes a cushion, a frame and an elbow; the cushion is arranged on the frame and forms a ventilation cavity with the frame; the elbow is connected with the frame, and the breathing mask further includes a flow rate adjusting device as described above,

[0015] wherein the frame is one of the first and second venting members, and the elbow is the other of the first and second venting members.

[0016] According to a third aspect of the present application, there is provided a flow adjustable respiratory mask, a cushion, a frame and an elbow; the cushion is arranged on the frame and forms a venting cavity with the frame; the elbow is connected to the frame; the respiratory mask further comprises:

[0017] an adjusting device and an exhaust passage, the exhaust passage is in communication with the venting cavity, and the adjusting device is used to change the area of the exhaust passage to change the exhaust flow.

[0018] In one embodiment, the adjusting device is arranged on the frame,

[0019] the adjusting device comprises an intermediate member rotatably arranged between the frame and the elbow, the exhaust passage is an exhaust gap arranged between the frame and the intermediate member and / or arranged between the intermediate member and the elbow, and when the intermediate member rotates in a predetermined direction along the circumference thereof, the width of the exhaust gap between the intermediate member and the frame and / or the intermediate member and the elbow changes periodically.

[0020] In one embodiment, the intermediate member comprises a plurality of clamping platforms arranged along the circumference thereof, the frame comprises a plurality of outer protrusions arranged on the outer side of the frame and along the circumference thereof, the clamping platforms and the outer protrusions cooperate to form the exhaust gap, and when the intermediate member rotates in a predetermined direction along the circumference thereof, the relative positions between the clamping platforms and the outer protrusions change to make the width of the exhaust gap change periodically.

[0021] In one embodiment, the heights of the plurality of clamping platforms and the plurality of outer protrusions change periodically along the predetermined direction, and the height change rule of the plurality of outer protrusions is opposite to that of the plurality of clamping platforms.

[0022] In one embodiment, the intermediate member further comprises a plurality of buckles arranged along the circumference thereof, the frame comprises a plurality of inner protrusions arranged on the inner side of the frame and along the circumference thereof, and the plurality of buckles and the plurality of inner protrusions cooperate to limit the plugging freedom of the intermediate member in the axial direction.

[0023] In one embodiment, the thicknesses of the plurality of buckles and the heights of the plurality of inner protrusions change periodically along the predetermined direction, and the thickness change rule of the plurality of buckles is opposite to that of the plurality of inner protrusions.

[0024] In one embodiment, a connecting pipe column is arranged between the buckle and the buckle base, a connecting hole is arranged on the frame and communicates with the inner side and the outer side of the frame, the inner boss and the outer boss are arranged at the inner side end and the outer side end of the connecting hole respectively, and the connecting pipe column is arranged in the connecting hole in a penetrating manner,

[0025] The exhaust gap includes a front gap section defined by the outer wall of the connecting pipe column and the inner wall of the connecting hole, and a rear gap section defined by the fitting gap between the buckle base and the outer boss,

[0026] When the intermediate piece rotates in a predetermined direction along the circumference thereof, the width of the rear gap section changes periodically.

[0027] In one embodiment, the outer side of the frame is further provided with an identification area.

[0028] In one embodiment, the adjusting device further includes an adjusting tool, and a rotating groove is arranged on the outer end surface of the intermediate piece, and the adjusting tool can make the intermediate piece rotate in a predetermined direction along the circumference thereof after being inserted into the rotating groove.

[0029] In one embodiment, the exhaust passage is an exhaust hole, the adjusting device includes an exhaust baffle covering the exhaust hole, and the exhaust baffle is in sliding connection with the frame to change the number of the exhaust holes covered.

[0030] Compared with the prior art, the advantage of the present application is that the area of the exhaust passage on the frame is changed by the adjusting device, so as to change the exhaust flow, and the respiratory mask of the present application can meet various types of breathing machines and diversified use environments. BRIEF DESCRIPTION OF DRAWINGS

[0031] The present application will be described in more detail below based on the embodiments and with reference to the drawings.

[0032] Figure 1a It is an exploded view of the flow adjusting device in one embodiment of the present application;

[0033] Figure 1b It is an exploded view of the flow adjusting device in another embodiment of the present application;

[0034] Figure 1c It is an exploded view of the flow adjusting device in another embodiment of the present application;

[0035] Figure 2a It is an exploded view of the respiratory mask with adjustable flow in one embodiment of the present application;

[0036] Figure 2bAn exploded view of a flow adjustable respiratory mask according to another embodiment of the present invention;

[0037] Figure 2c An exploded view of a flow adjustable respiratory mask according to another embodiment of the present invention;

[0038] Figure 3a A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention;

[0039] Figure 3b An exploded view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 3a

[0040] Figure 4a A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 4b Figure 3a A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention;

[0041] Figure 5 A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 3a

[0042] A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 6 Figure 3a A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention;

[0043] Figure 7 A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 6 A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention;

[0044] Figure 8a A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 3a

[0045] A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 8b Figure 8a A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention;

[0046] Figure 8c A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 8a

[0047] A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 9 Figure 3a A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention;

[0048] Figure 10 A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 11 Figure 3a A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention;

[0049] Figure 12 A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 10

[0050] A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; Figure 13 Figure 11 A perspective view of a flow adjustable respiratory mask according to embodiment one of the present invention; ​​​​​​​

[0051] Figure 14a for Figure 9 a partial cross-sectional view of the frame shown;

[0052] Figure 14b for Figure 14a an expanded view of the frame shown;

[0053] Figure 14c for Figure 14b a schematic view of the height variation of the card table in the first cycle period shown;

[0054] Figure 15 for Figure 3a a front view of the flow adjustable breathing mask shown;

[0055] Figure 16 for Figure 15 a partial cross-sectional view at D-D;

[0056] Figure 17a for Figure 16 an enlarged view at E;

[0057] Figure 17b fora partial cross-sectional view of the breathing mask when the gear is 3;

[0058] Figure 18a for Figure 3a a partial cross-sectional view of the intermediate piece and the frame of the flow adjustable breathing mask shown when the gear is "0";

[0059] Figure 18b foran expanded view of the frame shown; Figure 18a

[0060] fora partial cross-sectional view of the intermediate piece and the frame of the flow adjustable breathing mask shown when the gear is "1"; Figure 19a Figure 3a foran expanded view of the frame shown;

[0061] Figure 19b Figure 19a for a partial cross-sectional view of the intermediate piece and the frame of the flow adjustable breathing mask shown when the gear is "2";

[0062] Figure 20a for an expanded view of the frame shown; Figure 3a

[0063] for a partial cross-sectional view of the intermediate piece and the frame of the flow adjustable breathing mask shown when the gear is "3"; Figure 20b Figure 20a for an expanded view of the frame shown;

[0064] Figure 21a Figure 3a for a partial cross-sectional view of the intermediate piece and the frame of the flow adjustable breathing mask shown when the gear is "3";

[0065] Figure 21b forFigure 21a an expanded view of the mask of the prior art;

[0066] Figure 22 a perspective view of the adjusting tool in the embodiment of the present application;

[0067] Figure 23 a perspective view of the adjusting tool in the embodiment of the present application;

[0068] Figure 24 a perspective view of the flow-adjustable breathing mask shown in Embodiment 2;

[0069] Figure 25 a perspective view of the flow-adjustable breathing mask shown in Embodiment 2;

[0070] Figure 26 and Figure 27 a perspective view of the mask of the prior art.

[0071] FIG. 1-2 is a diagram illustrating:

[0072] 101, 201, 301 - first ventilation member; 102, 202, 302 - second ventilation member; 103, 203, 303 - intermediate member; 101a, 201a, 301a - support; 101b, 201b, 301b - adapter; 1 - forehead pad; 2 - cushion; 3 - frame; 5 - elbow;

[0073] FIG. 3-25 is a diagram illustrating:

[0074] 1 - forehead pad; 2 - cushion; 3 - frame; 4 - intermediate member; 5 - elbow; 6 - adjusting tool; 7 - exhaust baffle; 31 - forehead support area; 32 - frame body; 33 - headband buckle; 34 - connecting hole; 35 - exhaust small hole; 321 - rotation mark; 322 - gear mark;

[0075] 341 - inner boss; 342 - inner wall; 343 - outer boss; 3411 - inner ladder surface; 3431 - outer ladder surface; 41 - buckle; 411 - first side surface;

[0076] 42 - clamping post; 421 - second side surface; 43 - indication arrow; 44 - rotation groove; 45 - connecting column; 46 - flange;

[0077] 61 - adjusting probe; 62 - adjusting handle;

[0078] Figure 26 and 27 FIG. 1-2 is a diagram illustrating:

[0079] 1' - mask body; 2' - elbow; 11 - exhaust hole. DETAILED DESCRIPTION

[0080] The application will be further described below with reference to the accompanying drawings.

[0081] According to a first aspect of the application, there is provided a flow regulating device comprising a first venting member and a second venting member, and an intermediate member disposed between the first and second venting members, the intermediate member being provided with an exhaust passage between the first and / or second venting member, the area of the exhaust passage being variable to vary the exhaust flow rate.

[0082] As shown in the embodiment of Fig. 1, the first venting member comprises a bracket 101a and an adapter 101b, the adapter 101b being connected to the bracket 101a in cooperation or integrally formed. The second venting member is a bend pipe 102, and the intermediate member 103 is rotatably connected to the adapter 101b and the bend pipe 102 respectively. When the intermediate member 103 is rotated, the relative position between the intermediate member 103 and the adapter 101b or the bend pipe 102 is changed to vary the area of the exhaust passage. Figure 1a As shown in the embodiment of Fig. 2, the first venting member comprises a bracket 201a and an adapter 201b, the adapter 201b being connected to the bracket 201a in cooperation or integrally formed. In this embodiment, the second venting member 202 and the intermediate member 203 are integrally formed as a cylindrical structure, i.e. the intermediate member 203 is the front part of the cylindrical structure rotatably connected to the adapter 201b, and the second venting member 202 is the rear part of the cylindrical structure connected to the breathing machine. When the cylindrical structure is rotated, the relative position between the cylindrical structure and the adapter 101b is changed to vary the area of the exhaust passage.

[0083] Figure 1b

[0084] As shown in the embodiment of Fig. 3, the first venting member comprises a bracket 301a and an adapter 301b, the adapter 301b being connected to the bracket 301a in cooperation or integrally formed. And the second venting member 302 and the intermediate member 303 are also integrally formed as a cylindrical structure. But different from the embodiment of Fig. 2, the diameter of the rear end of the second venting member 302 is smaller, and when the second venting member 302 is connected to the breathing machine, the pipeline of the breathing machine is sleeved on the second venting member 302. Figure 1c Figure 1b Figure 1b

[0085] Further, when the intermediate members 103, 203, 303 are rotated, the relative position between the intermediate members 103, 203, 303 and the first venting members 101, 201, 301 or the second venting members 102, 202, 302 is periodically changed to periodically vary the area of the exhaust passage.

[0086] ​​​​​The three embodiments described above are merely examples. It is understood that the assembly formed by the adapter and the intermediate component can be adapted as an independent flow regulating device to any device requiring flow regulation. For example, the adapter has two ends, one end of which is connected to the intermediate component, and the other end is a first adapter end, which communicates with other venting components (including but not limited to a frame). Similarly, the intermediate component also has two ends, the opposite end of which is connected to the adapter, which is a second adapter end, and this second adapter end can be adapted to other venting components (including but not limited to a frame).

[0087] For example, the first adapter end of the adapter is connected to the bend pipe while the second adapter end of the intermediate part is connected to the intake pipe, or the adapter and the intermediate part are integrally set as a component at a preset exhaust position on the frame, and the second adapter end does not have a second venting component connected to it. Therefore, in this case, the second adapter end is a closed end.

[0088] In addition, in some other embodiments, the intermediate member is slidably connected to the first vent or the second vent; when the intermediate member slides, its relative position to the first vent or the second vent changes to change the area of ​​the exhaust passage.

[0089] According to a second aspect of the invention, such as Figures 2a-2c The present invention provides a flow-adjustable breathing mask, which includes a pad 2, a frame 3, and a curved tube 5; the pad 2 is disposed on the frame 3 and forms a ventilation cavity with the frame 3; the curved tube 5 is connected to the frame 3, and the breathing mask also includes the aforementioned flow-adjusting device.

[0090] Among them, frame 3 is one of the first ventilation component 101, 201, 301 and the second ventilation component 102, 202, 302, and bend 5 is the other of the first ventilation component 101, 201, 301 and the second ventilation component 102, 202, 302.

[0091] like Figure 2a In the embodiment shown, frame 3 is the first vent 101, and bend 5 is the second vent 102; as Figure 2b In the embodiment shown, frame 3 is the first venting element 201, and bend 5 is the second venting element 202, which is integrally formed with intermediate element 203; as Figure 2c In the embodiment shown, the frame 3 is the first ventilation component 301, and the bend 5 is the second ventilation component 302, which is integrally formed with the intermediate component 303.

[0092] According to a third aspect of the invention, such as Figure 3a and 3bAs shown, the present application provides a flow-adjustable breathing mask, which comprises a cushion 2, a frame 3 and an elbow 5; a forehead pad 1 is arranged on the upper inside of the frame 3 for contacting the forehead of a user, the cushion 2 is arranged on the frame 3 and forms a ventilation cavity with the frame 3; the elbow 5 is connected with the frame 3, for example, the elbow 5 is rotatably connected with the frame 3. The frame 3 is provided with an adjusting device and an exhaust passage, the exhaust passage is connected with the ventilation cavity, and the adjusting device is used for changing the area of the exhaust passage opened on the frame 3 to change the exhaust flow.

[0093] It can be understood that the larger the area of the exhaust passage opened, the greater the exhaust flow; the smaller the area of the exhaust passage opened, the smaller the exhaust flow.

[0094] The present application provides a detailed description of the structure and principle of the adjusting device through different embodiments.

[0095] Embodiment one

[0096] In this embodiment, the adjusting device comprises an intermediate piece 4 rotatably arranged between the frame 3 and the elbow 5, and the exhaust passage is an exhaust gap arranged between the frame 3 and the intermediate piece 4; when the intermediate piece 4 rotates in a predetermined direction along its circumference, the width of the exhaust gap between the intermediate piece 4 and the frame 3 changes, so that the area of the exhaust passage opened changes periodically.

[0097] The predetermined direction can be a clockwise rotation direction as shown in Figure 25 The axial relative position between the intermediate piece 4 and the frame 3 changes when the intermediate piece 4 rotates, thereby changing the area of the exhaust passage opened to change the exhaust flow.

[0098] In this embodiment, the intermediate piece 4 is rotatably connected with the frame 3, and the intermediate piece 4 is rotatably connected or fixedly connected with the elbow 5.

[0099] It should be noted that the periodic change of the area of the exhaust passage opened can be periodic increase or decrease.

[0100] Specifically, please refer to Figure 4a , Figure 13 and Figure 17b together, the exhaust passage is an exhaust gap, wherein the exhaust gap comprises a gap front end 100 and a gap rear section 200 described below (as shown in Figure 17b , wherein Figure 17b is a partial sectional view when the gear of the breathing mask is in the third gear). 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 at the position where the intermediate piece 4 is installed, so that the intermediate piece 4 and the frame 3 have a certain gap in the axial direction, i.e. the gap front section 100.

[0101] Further, the intermediate piece 4 comprises a plurality of clamping blocks 42 arranged along the circumference of the intermediate piece 4, and the frame 3 comprises a plurality of outer protrusions 343 arranged on the outer side of the frame 3 and along the circumference of the frame 3, the clamping blocks 42 cooperating with the outer protrusions 343 to form the rear gap section 200. When the intermediate piece 4 rotates along its circumference in a predetermined direction, the size of the front gap section 100 does not change, but the relative positions between the clamping blocks 42 and the outer protrusions 343 change so that the width of the rear gap section 200 periodically changes. Since one end of the front gap section 100 communicates with the inner side of the frame 3, the other end communicates with the rear gap section 200, and the rear gap section 200 communicates with the outside, the width change of the rear gap section 200 will cause the exhaust flow to change.

[0102] Further, the heights of the plurality of clamping blocks 42 and the plurality of outer protrusions 343 periodically change along the predetermined direction, and the height change rule of the plurality of outer protrusions 343 is opposite to that of the plurality of clamping blocks 42. For example, the heights of the plurality of clamping blocks 42 periodically decrease and then increase along the clockwise direction, and the heights of the plurality of outer protrusions 343 periodically increase and then decrease along the clockwise direction.

[0103] In addition, the intermediate piece 4 further comprises a plurality of buckles 41 arranged along the circumference of the intermediate piece 4, and the frame 3 comprises a plurality of inner protrusions 341 arranged on the inner side of the frame 3 and along the circumference of the frame 3, the plurality of buckles 41 cooperating with the plurality of inner protrusions 341 to limit the plugging freedom of the intermediate piece 4 in the axial direction.

[0104] Further, please refer to Figure 12 , the thicknesses of the plurality of buckles 41 and the heights of the plurality of inner protrusions 341 periodically change along the predetermined direction, and the thickness change rule of the plurality of buckles 41 is opposite to the height change rule of the plurality of inner protrusions 341. For example, the thicknesses of the plurality of buckles 41 periodically decrease along the clockwise direction, and the heights of the plurality of inner protrusions 341 periodically increase along the clockwise direction.

[0105] In the present application, the "plurality" refers to two or more.

[0106] The present application will be described in detail below with the number of buckles 41 and inner protrusions 341 being 4 and the number of clamping blocks 42 and outer protrusions 343 being 16.

[0107] First, the intermediate piece 4 with 4 buckles 41 and 16 clamping blocks 42 will be described.

[0108] Based on the number of buckles 41 and clamping blocks 42, the change period of their thicknesses or heights is set to 4. As shown in Figure 5 , the intermediate piece 4 has 4 cycles, and the angle of each cycle is 90°.

[0109] As shown in Figures 4a-7 , the intermediate piece 4 is in the shape of a cylinder, one end of which is a flange 46 and the other end of which is a connecting cylinder 45, the inner side of the flange 46 is provided with clamping posts 42, and the clamping posts 42 are in the shape of a ladder. As shown in Figure 4a , the inner side end face of the clamping post 42 is a second side face 421, which is configured as a fan-shaped face and is an inclined helical face, and the central angle thereof is 22.5°. The second side face 421 is used to cooperate with the outer boss 343, and the cooperation relationship thereof will be described in detail below.

[0110] The outer wall of the connecting cylinder 45 is provided with four buckles 41 at equal intervals. It can be understood that, in the radial section of the intermediate piece 4, the central angle of the buckle 41 is 45°. The outer side face of the buckle 41 is a first side face 411, which is an inclined helical face, so that the thickness of the buckle 41 periodically decreases in the clockwise direction. The existence of the first side face 411 makes the intermediate piece 4 movable in a certain range in the axial direction.

[0111] In order to clearly describe the structure and change of the buckle 41 and the clamping post 42, the present application provides an unfolded view of the outer side face of the intermediate piece 4, as shown in Figure 8a and Figure 8b . It can be seen from Figure 8b that, in each cycle, the thickness (i.e. the distance along the Y-axis direction shown in Figure 8b ) of the buckle 41 gradually decreases along the positive direction of the X-axis, while the height (i.e. the distance along the Y-axis direction shown in Figure 8b ) of the clamping post 42 first decreases and then increases along the positive direction of the X-axis.

[0112] As shown in Figure 8c , taking the first cycle as an example, in the first cycle, there are four clamping posts 42, and the inner side end faces of the four clamping posts 42 are respectively a second side face 421a, a second side face 421b, a second side face 421c and a second side face 421d. From the second side face 421a to the second side face 421b, the height of the clamping post 42 decreases; and from the second side face 421b to the second side face 421c and then to the second side face 421d, the height of the clamping post 42 increases. In other words, in the first cycle, the height of the clamping post 42 first decreases and then increases. The reason for setting this clamping post 42 with a height that first decreases is to ensure that, when the clamping post 42 cooperates with the outer boss 343, in each cycle, at least one second side face 421 is closely matched with one outer ladder face 3431 of the outer boss 343, so that the frame 3 plays a role of axially supporting the intermediate piece 4.

[0113] In the second cycle, the third cycle and the fourth cycle, the height change of the clamping post 42 is the same as that in the first cycle, and will not be described here.

[0114] Understandably, clockwise is... Figure 8b The positive direction is indicated by the X-axis.

[0115] like Figure 8b As shown, the first side surface 411 is an inclined helical surface, and the second side surface 421 is also an inclined helical surface, but their inclination directions are different. Therefore, the intermediate component 4 can rotate clockwise, allowing it to move axially within a specific range, thereby changing its relative position with the frame 3.

[0116] Preferably, an indicator arrow 43 is also provided on the outer end face of the flange 46. When the intermediate part 4 rotates, the indicator arrow 43 points to the gear position mark 322 on the frame 3, indicating the gear position. Since four cycles are set in this embodiment, four indicator arrows 43 are set at 90° intervals.

[0117] The frame 3, which has 4 inner bosses 341 and 16 outer bosses 343, will be described in detail below.

[0118] like Figures 9-13 As shown, the frame 3 includes a forehead support area 31 connected to the forehead pad 1, a frame body 32 connected to the forehead support area 31, headband buckles 33 disposed on both sides of the frame body 32, and a curved tube interface area disposed on the frame body 32. The curved tube interface area is constructed as a connecting hole 34 connecting the inner and outer sides of the frame 3. An outer boss 343 is provided on the outer side of the connecting hole 34, and an inner boss 341 is provided on its inner side.

[0119] The connecting column 45 of the intermediate component 4 is disposed through the connecting hole 34 so that the outer side of the buckle 41, i.e. the first side 411, mates with the end face of the inner boss 341; at the same time, the inner side of the buckle 42, i.e. the second side 421, mates with the end face of the outer boss 343, so that the intermediate component 4 is rotatably disposed in the connecting hole 34 of the frame 3.

[0120] Understandably, in order to correspond with the latch 41, there are also 4 inner bosses 341; and in order to correspond with the latch 42, there are also 16 outer bosses 343. The cycle of the inner bosses 341 and the outer bosses 343 is consistent with the cycle mentioned above.

[0121] Furthermore, the end face of the inner boss 341, namely the inner trapezoidal surface 3411 (as shown in the image), is also a feature of the inner boss 341. Figure 12 As shown, the structure is an inclined spiral surface, which matches the first side surface 411, thereby causing the thickness of the inner boss 341 to increase periodically in the clockwise direction.

[0122] The end face of the outer boss 343, i.e., the outer trapezoidal surface 3431 (e.g.) Figure 13The outer convexes 343 are also configured as inclined helical surfaces, which cooperate with the second side surface 421, and the central angle of the outer ladder surface 3431 is also 22.5°. Since the plurality of clamping posts 42 presents a periodic step shape of first decreasing and then increasing in the clockwise direction, in order to cooperate with the plurality of clamping posts 42, the plurality of outer convexes 343 presents a periodic step shape of first increasing and then decreasing in the clockwise direction.

[0123] Therefore, it can be understood that there is a certain position (i.e. the "0" gear position described below) at which the 16 outer convexes 343 can be in close contact with the corresponding 16 clamping posts 42, respectively; and if the intermediate piece 4 is rotated at this position, there will be some positions (i.e. the "3" gear position, the "2" gear position and the "1" gear position described below) at which the 16 outer convexes 343 are not in close contact with the corresponding 16 clamping posts 42, respectively, but have a certain gap.

[0124] When the connecting column 45 is inserted into the connecting hole 34, the end surface of the inner convex 341, i.e. the inner ladder surface 3411 cooperates with the first side surface 411, and the end surface of the outer convex 343, i.e. the outer ladder surface 3431 cooperates with the second side surface 421, at this time, the axial insertion and extraction freedom of the intermediate piece 4 is limited, but it can be rotated in the axial direction. And since the above-mentioned cooperating surfaces are all inclined helical surfaces, during the rotation of the intermediate piece 4, the intermediate piece 4 will produce a certain displacement in the axial direction relative to the frame 3, thereby changing the area of the exhaust gap.

[0125] In order to clearly describe the structure and change of the outer convex 343 and the inner convex 341, the present application gives the inside surface development drawing of the connecting hole 34, as shown in Figure 14a and Figure 14b It can be seen from Figure 14b that in each cycle, the height of the inner convex 341 (i.e. the distance along the Y-axis direction shown in Figure 14b ) gradually increases along the positive direction of the X-axis (opposite to the change of the thickness of the buckle 41), and the height of the outer convex 343 (i.e. the distance along the Y-axis direction shown in Figure 14b ) first increases and then decreases along the positive direction of the X-axis (opposite to the change of the height of the clamping post 42).

[0126] As shown in Figure 14c , taking the first cycle as an example, in the first cycle, there are four outer convexes 343, and the end surfaces of the four outer convexes 343 are outer ladder surface 3431a, outer ladder surface 3431b, outer ladder surface 3431c and outer ladder surface 3431d, respectively. From the outer ladder surface 3431a to the outer ladder surface 3431b, the height of the outer convex 343 increases; and from the outer ladder surface 3431b to the outer ladder surface 3431c and then to the outer ladder surface 3431d, the height of the outer convex 343 decreases.

[0127] During the second, third, and fourth cycle periods, the height change of the outer boss 343 is the same as that during the first cycle period, and will not be described again here.

[0128] Understandably, at a specific position (i.e., the "0" position as described below), the outer trapezoidal surfaces 3431a, 3431b, 3431c, and 3431d are in complete and tight contact with the second side surfaces 421a, 421b, 421c, and 421d, respectively, such as... Figure 18b As shown, at this point, the width of the rear section 200 of the gap is zero, meaning that air cannot be released to the outside.

[0129] Understandably, clockwise is... Figure 14b The positive direction is indicated by the X-axis.

[0130] In addition, such as Figure 9 As shown, an identification area is provided on the outer side of the frame body 32 adjacent to the connecting hole 34. The identification area is provided with a rotation mark 321 and a gear mark 322. The rotation mark 321 is used to indicate the rotation direction of the intermediate part 4, and the gear mark 322 is used to indicate the magnitude of the exhaust flow.

[0131] The rotation indicator 321 can be any shape, such as an arrow, that indicates the direction of rotation. It should be noted that the intermediate component 4 can only rotate in the direction indicated by the rotation indicator 321 and cannot rotate in the opposite direction. The gear position indicator 322 can be Arabic numerals, Roman numerals, or Chinese characters, representing size, or it can be a graphic representing size, such as circles of different sizes or polygons with different numbers of angles. This invention does not limit the scope of the design.

[0132] like Figure 9 As shown, the direction indicated by the rotation mark 321 is clockwise, and the gear mark 322 are 0, 1, 2 and 3 respectively.

[0133] Understandably, when the indicator arrow 43 points to the gear position mark 322 "0", the corresponding exhaust flow is the smallest (0, which means no exhaust mask), and when it points to the gear position mark 322 "3", the corresponding exhaust flow is the largest (which means high flow mask).

[0134] Furthermore, both the rotation mark 321 and the gear position mark 322 can protrude from or be recessed from the outer surface of the frame body 32; they can be molded together with the frame 3, or they can be formed later by screen printing, spraying, or other methods. This invention does not limit these aspects.

[0135] It can be understood that the cycle period in the above embodiment is 4, so that the middle piece rotates 1 turn (i.e. 360°), and the indicating arrow 43 has 4 opportunities to point to the "3" gear, the "2" gear, the "1" gear and the "0" gear respectively.

[0136] The principle of the adjusting device of the present application adjusting the exhaust flow rate will be described in detail below.

[0137] As shown in Figure 15 Fig. 21, the connecting column 45 is disposed through the connecting hole 34, and the exhaust gap includes a gap front section 100 (as shown in Figure 17a and 17b ) defined by the outer wall of the connecting column 45 and the inner wall 342 of the connecting hole 34, and a gap rear section 200 (as shown in Figure 17b ) defined by the cooperation gap between the second side surface 421 of the clamping post 42 and the outer ladder surface 3431 of the outer boss 343. When the middle piece 4 rotates in a predetermined direction along the circumference thereof, the width of the gap rear section 200 periodically changes.

[0138] Since the clamping posts 41 of the above middle piece 4 are spaced apart (i.e. not connected to each other), the gap front section 100 is in communication with the inner chamber of the frame 3 in the spacing region between the clamping posts 41. Moreover, the width of the gap front section 100 does not change during the rotation of the middle piece 4 relative to the frame 3. Therefore, the size of the exhaust flow rate is determined by the width of the gap rear section 200.

[0139] According to the size of the width of the gap rear section 200, the exhaust flow rate is divided into 4 gears, i.e. 0 gear, 1 gear, 2 gear and 3 gear. From 0 gear to 3 gear, the higher the gear, the greater the exhaust flow rate. Among them, 0 gear is a non-exhaust mask, and 3 gear is a high-flow mask. The above 4 gears are indicated by the gear identification 322 on the frame 3.

[0140] When the indicating arrow 43 points to "0" of the gear identification 322, the second side surface 421 and the end surface (outer ladder surface 3431) of the outer boss 343 are in complete sealing cooperation, at this time, the area of the gap rear section 200 is 0, as shown in Figure 18a and Figure 18b , wherein Figure 18b is an unfolded view of the connecting portion of the middle piece 4 and the frame 3. That is, at this time, there is no exhaust, and therefore the breathing mask can be used as a non-exhaust mask in a medical environment.

[0141] When the indicating arrow 43 points to "3" of the gear identification 322, the second side surface 421 and the end surface (outer ladder surface 3431) of the outer boss 343 are misaligned with each other, so that the width of the gap rear section 200 is maximum, as shown in Figure 21a and 21b , wherein Figure 21bis a schematic view of the connection portion of the intermediate 4 and the frame 3 after being unfolded. In the "3" gear, the breathing mask is a high flow mask when in use.

[0142] In the "3" gear, the breathing mask is a high flow mask when in use. Figure 20a is a schematic view of the connection portion of the intermediate 4 and the frame 3 after being unfolded. In the "3" gear, the breathing mask is a high flow mask when in use. Figure 20b is a schematic view of the connection portion of the intermediate 4 and the frame 3 after being unfolded. In the "3" gear, the breathing mask is a high flow mask when in use.

[0143] Further, in the "2" gear, the intermediate 4 is further rotated 22.5° (i.e. the degree of the central angle of one card table 42) in the clockwise direction, so that the indicating arrow 43 points to the "1" gear of the gear identification 322. Since the matching surface of the first side surface 411 and the inner ladder surface 3411 is an inclined helical surface, in the process of rotating the intermediate 4 in the clockwise direction, the intermediate 4 moves in the axial direction relative to the frame 3, and the width of the rear section 200 of the thin gap between the second side surface 421 and the outer ladder surface 3431 continues to decrease, as shown in Figure 19a and 19b is a schematic view of the connection portion of the intermediate 4 and the frame 3 after being unfolded. In the "3" gear, the breathing mask is a high flow mask when in use. Figure 19b is a schematic view of the connection portion of the intermediate 4 and the frame 3 after being unfolded. In the "3" gear, the breathing mask is a high flow mask when in use.

[0144] Further, in the "2" gear, the intermediate 4 is further rotated 22.5° (i.e. the degree of the central angle of one card table 42) in the clockwise direction, so that the indicating arrow 43 points to the "1" gear of the gear identification 322. Since the matching surface of the first side surface 411 and the inner ladder surface 3411 is an inclined helical surface, in the process of rotating the intermediate 4 in the clockwise direction, the intermediate 4 moves in the axial direction relative to the frame 3, and the width of the rear section 200 of the thin gap between the second side surface 421 and the outer ladder surface 3431 continues to decrease, as shown in Figure 18a and 18b is a schematic view of the connection portion of the intermediate 4 and the frame 3 after being unfolded. In the "3" gear, the breathing mask is a high flow mask when in use.

[0145] Further, in the "2" gear, the intermediate 4 is further rotated 22.5° (i.e. the degree of the central angle of one card table 42) in the clockwise direction, so that the indicating arrow 43 points to the "1" gear of the gear identification 322. Since the matching surface of the first side surface 411 and the inner ladder surface 3411 is an inclined helical surface, in the process of rotating the intermediate 4 in the clockwise direction, the intermediate 4 moves in the axial direction relative to the frame 3, and the width of the rear section 200 of the thin gap between the second side surface 421 and the outer ladder surface 3431 continues to decrease, as shown in Figure 21a and 21bIf the rotation continues, the exhaust flow rate will be converted according to the above-mentioned rule of "3" gear → "2" gear → "1" gear → "0" gear.

[0146] It should be noted that the rotation direction of the intermediate piece 4 is determined by the step height change of the card table 42 and the inclination direction of the first side surface 411 of the buckle 41. For example, in the above-mentioned embodiment, the intermediate piece 4 can only rotate clockwise.

[0147] It can be understood that the number of degrees of rotation of the intermediate piece 4 required for each gear adjustment is determined by the number of card tables 42 and the number of cycle periods. For example, in the above-mentioned embodiment, the number of card tables 42 is set to 16, and there are a total of 4 cycle periods, so the number of degrees of rotation of the intermediate piece 4 corresponding to each gear is 22.5°.

[0148] In order to prevent the gear from being adjusted unexpectedly during the use of the breathing mask, the present application provides the following preferred embodiment. Specifically, the adjusting device further comprises a gear adjusting tool 6, and a rotation groove 44 is arranged on the outer side surface of the intermediate piece 4, and the gear adjusting tool 6 can make the intermediate piece 4 rotate in a predetermined direction along the circumferential direction after being inserted into the rotation groove 44.

[0149] The shape of the rotation groove 44 can be any shape such as a circle, a triangle, a square, etc., and the present application does not limit the shape of the rotation groove 44. In order to facilitate adjustment, preferably, the rotation groove 44 is spaced by 90 in the circumferential direction 4, as shown in Figure 6 .

[0150] Further, the present application shows a preferred gear adjusting tool 6. Specifically, the gear adjusting tool 6 comprises a gear adjusting probe 61 and a gear adjusting handle 62. The gear adjusting handle 62 serves as a hand holding support arm during gear adjustment. In order to apply force uniformly, the number of gear adjusting probes 61 is generally not less than 2, and the shape of the gear adjusting probe 61 is consistent with the shape of the rotation groove 44.

[0151] As shown in Figure 23 , three gear adjusting probes 61 are shown. In use, the gear adjusting probe 61 is inserted into the rotation groove 44, and the gear adjusting handle 62 is held and rotated.

[0152] It can be understood that when the gear adjusting tool 6 is used, the rotation direction must be consistent with the direction of the rotation mark 321 on the frame 3, for example, the clockwise direction described in the above-mentioned embodiment.

[0153] In summary, the main idea of the present example is to change the relative position between the intermediate piece 4 and the frame 3 by rotating the intermediate piece 4, so as to increase or decrease the area of the exhaust gap between the two, and then change the exhaust flow rate, so as to realize the mutual conversion between the exhaust mask, the low flow mask and the high flow mask.

[0154] It can be understood that the adjustment angle, the rotation direction, the gear setting, and the implementation method of the adjustment angle are not limited to the above embodiments.

[0155] Embodiment Two

[0156] In this embodiment, the same or similar components or parts as those in Embodiment One, such as the head pad 1, the gasket 2, the frame 3, and the elbow pipe 5, will not be described again. It can be understood that the same components or parts in Embodiment One can be directly replaced or used in combination without any technical obstacles.

[0157] The difference between this embodiment and Embodiment One is that the exhaust gap is arranged between the intermediate piece 4 and the elbow pipe 5, and at this time, the intermediate piece 4 and the frame 3 can be fixedly connected or rotatably connected, and the intermediate piece 4 and the elbow pipe 5 are adjustably connected. The relative positions of the intermediate piece 4 and the elbow pipe 5 are adjusted by the relative rotation therebetween, so as to achieve the purpose of adjustable exhaust flow.

[0158] Preferably, the intermediate piece 4 and the frame 3 are rotatably connected.

[0159] Embodiment Three

[0160] In this embodiment, the same or similar components or parts as those in Embodiment One, such as the head pad 1, the gasket 2, the frame 3, and the elbow pipe 5, will not be described again. It can be understood that the same components or parts in Embodiment One can be directly replaced or used in combination without any technical obstacles.

[0161] The difference between this embodiment and Embodiment One is that, in this embodiment, as shown in Figure 24 , the exhaust passage is an exhaust hole 35, and the adjusting device includes an exhaust baffle 7 covering the exhaust hole 35, and the exhaust baffle 7 is slidably connected with the frame 3 to change the number of covered exhaust holes 35. As shown by the arrow in Figure 24 , the sliding direction of the exhaust baffle 7, when the exhaust baffle 7 slides on the frame 3, the number of covered exhaust holes 35 increases or decreases, so as to change the exhaust flow of the breathing mask to realize the conversion between the no-exhaust mask, the low-flow mask, and the high-flow mask.

[0162] It should be noted that the exhaust hole in the present application refers to a through hole with a hole diameter of less than 1 mm.

[0163] The directions mentioned in the above are defined as follows:

[0164] The axial direction is the axial direction of the intermediate piece 4, as shown in Figure 25 ; the clockwise direction is the circumferential direction when rotating about the axis of the intermediate piece 4, as shown in Figure 25The side of the respiratory mask that is further away from the face of the user is referred to as the outer side, and the side of the respiratory mask that is closer to the face of the user is referred to as the inner side.

[0165] It can be understood that, in the above embodiment, the cycle period is 4, but in actual implementation, as long as it is an even number (2, 4, 6, …) of cycle periods, the above purpose can be achieved. In specific implementation, as long as the number of buckles 41 and the card table 42 on the middleware 4 are adjusted accordingly, and the inner boss 341 and the outer boss 343 are adjusted adaptively, the above purpose can be achieved.

[0166] Although the present application has been described with reference to the preferred embodiments, various modifications can be made to the application without departing from the scope of the application. In particular, the technical features mentioned in each embodiment can be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A flow regulating device, characterized in that, The device includes a first ventilation element, a second ventilation element, and an intermediate element disposed between the first and second ventilation elements. An exhaust channel is provided between the intermediate element and the first and / or second ventilation elements for discharging exhaled waste gas from the patient. The exhaust channel includes an exhaust slit, which comprises a front section and a rear section. The front section is an axial gap between the intermediate element and the first and / or second ventilation elements, and the rear section is a radial gap between the intermediate element and the first and / or second ventilation elements. The front section communicates with the ventilation cavity of the breathing mask and the rear section, respectively, and the rear section communicates with the outside. When the intermediate element rotates, its relative position with the first or second ventilation element changes, thereby changing the width of the rear section of the slit, while the size of the front section remains unchanged. The intermediate component includes a first stepped structure, and the first ventilator and / or the second ventilator includes a second stepped structure with a height variation pattern opposite to that of the first stepped structure. The first stepped structure and the second stepped structure cooperate to form the rear section of the gap. When the intermediate component rotates, the relative position between the first stepped structure and the second stepped structure changes so that the width of the rear section of the gap changes periodically.

2. The flow regulating device according to claim 1, characterized in that, The intermediate component is rotatably connected to either the first or the second venting component.

3. A flow-adjustable breathing mask, comprising a pad (2), a frame (3), and a bend (5); characterized in that, The pad (2) is disposed on the frame (3) and forms a ventilation cavity with the frame (3); the bend (5) is connected to the frame (3), characterized in that the breathing mask further includes the flow regulating device as described in claim 1 or 2. The frame (3) is one of the first ventilator and the second ventilator, and the bend is the other of the first ventilator and the second ventilator.

4. A flow-adjustable breathing mask, comprising a pad (2), a frame (3), and a bend (5); characterized in that, The pad (2) is disposed on the frame (3) and forms a ventilation cavity with the frame (3); the bend (5) is connected to the frame (3), and the breathing mask further includes: An adjusting device and an exhaust channel, wherein the exhaust channel is connected to the ventilation chamber, the adjusting device is used to change the open area of ​​the exhaust channel to change the exhaust flow rate, and the exhaust channel is used to discharge the waste gas exhaled by the patient; The adjusting device is mounted on the frame (3), and includes an intermediate component (4) rotatably mounted between the frame (3) and the bend (5). The exhaust channel is an exhaust gap located between the frame (3) and the intermediate component (4) and / or between the intermediate component (4) and the bend (5). The exhaust gap includes a front section (100) and a rear section (200). The front section (100) is located axially between the intermediate component (4) and the frame (3) and / or the bend (5). The gap in the direction, the rear section (200) of the gap is the gap in the radial direction between the intermediate part (4) and the frame (3) and / or the bend (5), the front section (100) of the gap is connected to the ventilation cavity and the rear section (200) of the gap respectively, the rear section (200) of the gap is connected to the outside, when the intermediate part (4) rotates, its relative position with the frame (3) and / or the bend (5) changes, so as to change the width of the rear section (200) of the gap, and the size of the front section (100) of the gap remains unchanged; The intermediate component (4) includes a first stepped structure, and the frame (3) and / or the bend (5) includes a second stepped structure with a height variation pattern opposite to that of the first stepped structure. The first stepped structure and the second stepped structure cooperate to form the rear section of the gap. When the intermediate component rotates, the relative position between the first stepped structure and the second stepped structure changes so that the width of the rear section of the gap changes periodically.

5. The adjustable-flow breathing mask according to claim 4, characterized in that, The first stepped structure consists of a plurality of latches (42) arranged circumferentially along the intermediate member (4), and the second stepped structure consists of a plurality of external protrusions (343) arranged on the outside of the frame (3) and circumferentially along the frame (3). The latches (42) and the external protrusions (343) cooperate to form the rear section (200) of the gap. When the intermediate member (4) rotates circumferentially in a predetermined direction, the relative position between the latches (42) and the external protrusions (343) changes so that the width of the rear section (200) of the gap changes periodically; and / or The intermediate component (4) also includes multiple buckles (41), which are spaced apart circumferentially along the intermediate component (4). The frame (3) includes multiple inner bosses (341) disposed on the inner side of the frame (3) and disposed circumferentially along the frame (3). The multiple buckles (41) cooperate with the multiple inner bosses (341) to restrict the insertion and removal freedom of the intermediate component (4) in the axial direction.

6. The adjustable-flow breathing mask according to claim 5, characterized in that, The heights of the plurality of card holders (42) and the plurality of external protrusions (343) change periodically along a predetermined direction, and the height variation pattern of the plurality of external protrusions (343) is opposite to the height variation pattern of the plurality of card holders (42); and / or The thickness of the multiple buckles (41) and the height of the multiple inner bosses (341) change periodically in a predetermined direction, and the variation pattern of the thickness of the multiple buckles (41) is opposite to the variation pattern of the height of the multiple inner bosses (341).

7. The adjustable-flow breathing mask according to claim 6, characterized in that, A connecting post (45) is provided between the buckle (41) and the mounting plate (42). The frame (3) is provided with a connecting hole (34) connecting its inner and outer sides. The inner boss (341) and the outer boss (343) are respectively provided at the inner end and the outer end of the connecting hole (34). The connecting post (45) is provided through the connecting hole (34). The front section (100) of the gap is defined by the outer wall of the connecting column (45) and the inner wall of the connecting hole (34), and the rear section (200) of the gap is defined by the mating clearance between the locking platform (42) and the outer boss (343). When the intermediate component (4) rotates in a predetermined direction along its circumference, the width of the rear section (200) of the slit changes periodically.

8. The flow-adjustable breathing mask according to any one of claims 4-7, characterized in that, The outer side of the frame (3) is also provided with an identification area; and / or The adjustment device also includes a gear adjustment tool (6), and a rotating groove (44) is provided on the outer end face of the intermediate part (4). After the gear adjustment tool (6) is inserted into the rotating groove (44), the intermediate part (4) can rotate in a predetermined direction along its circumference.

Images