Nose mask

Abstract

A nose mask comprises a frame, a soft mask pad and an air delivery pipe. The frame comprises a main body and an air inlet hole penetrating through the main body. The air inlet hole is provided with a first hole diameter on a first section perpendicular to the left-right direction, the air inlet hole is provided with a second hole diameter on a second section perpendicular to the up-down direction, and the second hole diameter is larger than the first hole diameter. The soft mask pad comprises a bag body. The air delivery pipe is made of a flexible material and comprises a connecting part which can be installed in the air inlet hole in a pluggable mode. The connecting part can be installed in the air inlet hole in a pluggable mode through deformation, the air conveying pipe can be conveniently installed on the frame and can be easily detached from the frame, in addition, bridging parts do not need to be arranged between the air conveying pipe and the frame, and the assembling cost and the part cost can be reduced.

Description

Technical Field

[0001] The present invention relates to a nasal mask, and particularly to a nasal mask for treating respiratory disorders. Background Art

[0002] Referring to Figure 1 , a nasal plug type respirator disclosed in a patent with Taiwan, China certificate number TWI555542B, includes a connection unit 91, a nasal plug unit 92, and an air delivery unit 93. The connection unit 91 is made of a rigid material and includes a main body 911, a collar 912 formed on the rear side of the main body 911, and a convex ring 913 formed on the front side of the main body 911. The collar 912 and the convex ring 913 cooperate to define an air inlet 914. The convex ring 913 has an annular groove 915 formed on the outer peripheral surface. The nasal plug unit 92 is made of a flexible material and includes an opposite front wall 921 and a rear wall 922, a socket 923 provided on the front wall 921 for sleeving on the collar 912, and two nasal plug heads 924 respectively formed rearward from the rear wall 922. The air delivery unit 93 includes a connection cylinder 931 detachably mounted on the convex ring 913, and an air delivery pipe 932 rotatably mounted on the connection cylinder 931. The connection cylinder 931 has an insertion ring 933 inserted into the convex ring 913, and two elastic hooks 934 respectively provided on the left and right sides of the insertion ring 933. The elastic hooks 934 can be buckled on the annular groove 915. The air delivery pipe 932 is inserted into the insertion ring 933 and has two retaining pieces 935( Figure 1 only one is shown) that can block outside the rear end surface of the insertion ring 933, so that the air delivery pipe 932 is fixedly connected to the connection cylinder 931.

[0003] However, when the patient wearing the nasal plug type respirator turns over and causes pulling, the connection cylinder 931, as a part connecting the air delivery pipe 932 and the main body 911, is prone to wear and may cause gas leakage, so it needs to be replaced regularly, increasing the part cost. In addition, if the air delivery pipe 932 needs to be cleaned separately, the connection cylinder 931 needs to be removed first. And since both the retaining piece 935 and the insertion ring 933 are made of rigid materials, a relatively large force needs to be applied during removal, causing inconvenience in disassembly. Summary of the Invention

[0004] The object of the present invention is to provide a nasal mask that is convenient for disassembling the air delivery pipe and can reduce the part cost.

[0005] The nasal mask of the present invention comprises a frame, a soft cushion, and an air delivery tube. The frame is made of a rigid material and includes a main body, an air inlet hole penetrating through the main body in the front-rear direction, and an annular wall extending rearward from the main body and surrounding the outside of the air inlet hole. The main body has a mounting convex portion that circumferentially defines the air inlet hole. The air inlet hole has a first aperture diameter in a first cross-section perpendicular to the left-right direction. The air inlet hole has a second aperture diameter in a second cross-section perpendicular to the up-down direction. The second aperture diameter is greater than the first aperture diameter. The front-rear direction, the left-right direction, and the up-down direction are perpendicular to each other. The soft cushion is made of a flexible material and is detachably mounted on the frame. The soft cushion includes a bladder defining a chamber, a sleeve hole formed on the front side of the bladder for sleeving on the annular wall, and an air suction hole formed on the rear side of the bladder. The chamber communicates the air inlet hole with the air suction hole. The air delivery tube is made of a flexible material and communicates with the chamber. The air delivery tube includes a tube body portion, and a connecting portion connecting the tube body portion and deformable to be pluggably and removably mounted on the air inlet hole. The connecting portion has an outer peripheral surface and a mounting annular groove formed on the outer peripheral surface. The mounting annular groove has a first groove width in the first cross-section and a second groove width in the second cross-section. The connecting portion can be deformed between an uninstalled state and an installed state. When the connecting portion is in the uninstalled state, the air delivery tube is separated from the frame, the first groove width is greater than the first aperture diameter, and the second groove width is less than the second aperture diameter. When the connecting portion is in the installed state, the air delivery tube is connected to the frame, the connecting portion is compressed and deformed in the up-down direction, the first groove width is less than the first aperture diameter, the connecting portion is expanded and deformed in the left-right direction, and the mounting convex portion is clamped in the mounting annular groove.

[0006] In the nasal mask of the present invention, the outer peripheral surface of the connecting portion has an annular inclined surface section opposite to the tube body portion in the front-rear direction, the mounting convex portion has a planar section for defining the first aperture diameter and the second aperture diameter, and an arc surface section connected to the front side of the planar section.

[0007] For the nasal mask of the present invention, the mounting convex portion further has a front side surface section and a rear side surface section opposite to each other in the front-rear direction. The front side surface section is connected to the arc surface section, and the rear side surface section is connected to the flat surface section. The outer peripheral surface of the connecting portion further has a first connecting surface section connecting the annular inclined surface section, a second connecting surface section connecting the pipe body portion, a first abutting surface section extending radially inwards from the first connecting surface section, a second abutting surface section extending radially inwards from the second connecting surface section, and a third abutting surface section connecting between the first abutting surface section and the second abutting surface section. The first abutting surface section, the second abutting surface section and the third abutting surface section cooperate to define the mounting ring groove. The third abutting surface section has the first groove width in the first cross-section and the second groove width in the second cross-section. When the connecting portion is in the mounted state, the first abutting surface section abuts against the rear side surface section of the mounting convex portion, the second abutting surface section abuts against the front side surface section of the mounting convex portion, and the third abutting surface section abuts against the flat surface section and the arc surface section of the mounting convex portion.

[0008] For the nasal mask of the present invention, when the connecting portion is in the mounted state, the first groove width is less than and approaches the first aperture diameter, and the second groove width is less than and approaches the second aperture diameter.

[0009] For the nasal mask of the present invention, the frame further includes several air outlet holes penetrating through the main body in the front-rear direction and communicating the outside with the chamber. The air outlet holes are distributed on the left and right sides of the air inlet hole.

[0010] For the nasal mask of the present invention, the frame further includes two positioning grooves formed on the left and right sides of the main body. The positioning grooves are open towards the rear. The soft mask pad further includes two positioning posts formed on the left and right sides of the bladder body. The positioning posts can be inserted into the positioning grooves towards the front.

[0011] For the nasal mask of the present invention, the ratio of the first aperture diameter to the second aperture diameter is between 0.58 and 0.62.

[0012] For the nasal mask of the present invention, the force for pulling the air delivery pipe away from the frame in the front-rear direction is not less than 2.2 kgf. The force for pulling the air delivery pipe away from the frame at an angle of 45 degrees with the left-right direction in the second cross-section is not less than 1.4 kgf. The force for pulling the air delivery pipe away from the frame at an angle of 45 degrees with the front-rear direction in the first cross-section is not less than 0.6 kgf.

[0013] The beneficial effects of the present invention are as follows: by making the second aperture of the air inlet hole larger than the first aperture, making the air delivery pipe made of flexible material, and enabling the connecting part to be installed in the air inlet hole in a pluggable manner through deformation, the air delivery pipe can be conveniently installed on the frame and can be easily detached from the frame. In addition, there is no need to provide bridging parts between the air delivery pipe and the frame, which can reduce the assembly and parts costs. Description of the Drawings

[0014] Figure 1 is an exploded perspective view of a nasal plug type respirator disclosed in Taiwan, China Patent No. TWI555542B;

[0015] Figure 2 is an assembled perspective view of an embodiment of the nasal mask of the present invention;

[0016] Figure 3 is an exploded perspective view of the embodiment;

[0017] Figure 4 is another exploded perspective view of the embodiment;

[0018] Figure 5 is a front view of a frame and a soft gasket of the embodiment;

[0019] Figure 6 is Figure 5 a side cross-sectional view of;

[0020] Figure 7 is an incomplete side cross-sectional exploded view of the embodiment;

[0021] Figure 8 is an incomplete side cross-sectional assembled view of the embodiment;

[0022] Figure 9 is an incomplete top cross-sectional exploded view of the embodiment;

[0023] Figure 10 is an incomplete top cross-sectional assembled view of the embodiment. Detailed Description of the Invention

[0024] The present invention will be described in detail below with reference to the drawings and embodiments.

[0025] Refer to Figure 3 , 4 For the present invention, refer to Figure 2 and Figure 3 An embodiment of the nasal mask 1 of the present invention includes a frame 2, a soft gasket 3, and an air delivery pipe 4.

[0026] Refer to Figures 3 to 5, the frame 2 is made of a rigid material and includes a main body 21, an air inlet hole 22 penetrating the main body 21 in a front-rear direction X, two positioning grooves 23 formed on both sides of the main body 21 along a left-right direction Y, a ring wall 24 extending rearward from the main body 21 and surrounding the outside of the air inlet hole 22, several air outlet holes 25 penetrating the main body 21 in the front-rear direction X, and two buckle pieces 26 provided on both sides of the main body 21.

[0027] Refer to Figure 3 and Figure 6 , the main body 21 has a mounting convex portion 211 surrounding and defining the air inlet hole 22.

[0028] Refer to Figure 2 , Figure 5 and Figure 6 , the air inlet hole 22 is an elliptical hole, and the air inlet hole 22 has a first hole diameter D1 on a first cross-section S1 perpendicular to the left-right direction Y (see Figure 7 ), and the air inlet hole 22 has a second hole diameter D2 on a second cross-section S2 perpendicular to an up-down direction Z (see Figure 9 ). The second hole diameter D2 is greater than the first hole diameter D1, and the ratio of the first hole diameter D1 to the second hole diameter D2 is between 0.58 and 0.62.

[0029] Wherein, the front-rear direction X, the left-right direction Y and the up-down direction Z are perpendicular to each other.

[0030] Refer to Figure 5 and Figure 6 , the mounting convex portion 211 has a flat surface segment 212 for defining the first hole diameter D1 and the second hole diameter D2, a circular arc surface segment 213 connected to the front end of the flat surface segment 212, a front side surface segment 214 and a rear side surface segment 215 along opposite directions of the front-rear direction X. The front side surface segment 214 is connected to the circular arc surface segment 213, and the rear side surface segment 215 is connected to the flat surface segment 212. The rear side surface segment 215 extends obliquely rearward from one end connected to the flat surface segment 212 and is connected to the ring wall 24. In other words, the rear side surface segment 215 extends obliquely forward from one end connected to the ring wall 24 and is connected to the flat surface segment 212.

[0031] Refer to Figure 3 and Figure 4 , the positioning groove 23 opens rearward. The air outlet holes 25 are distributed on both the left and right sides of the air inlet hole 22. The buckle piece 26 is used for a headband (not shown in the figure) to pass through.

[0032] Refer to Figure 3 , Figure 4 and Figure 6, the soft cushion 3 is made of a flexible material and is detachably mounted on the frame 2. The soft cushion 3 includes a bladder 31 defining a chamber 311, a socket hole 32 formed on the front side of the bladder 31 for sleeving on the annular wall 24, an air suction hole 33 formed on the rear side of the bladder 31, and two positioning posts 34 formed on the left and right sides of the bladder 31. The chamber 311 communicates the air inlet hole 22 with the air suction hole 33. The air outlet hole 25 is used to communicate the outside with the chamber 311. The positioning posts 34 can be inserted forward into the positioning grooves 23.

[0033] Refer to Figure 3 , Figure 4 and Figure 8 , the air delivery pipe 4 is made of a flexible material and can communicate with the chamber 311. The air delivery pipe 4 includes a pipe body portion 41 and a connecting portion 42 connecting the pipe body portion 41. The connecting portion 42 can be deformed to be detachably mounted on the air inlet hole 22.

[0034] Refer to Figure 7 , the connecting portion 42 has an outer peripheral surface 43 and a mounting ring groove 44 formed on the outer peripheral surface 43.

[0035] The outer peripheral surface 43 has an annular inclined surface section 431 opposite to the pipe body portion 41 along the front-rear direction X, a first connecting surface section 432 connecting the annular inclined surface section 431, a second connecting surface section 433 connecting the pipe body portion 41, a first abutting surface section 434 extending radially inward from the first connecting surface section 432, a second abutting surface section 435 extending radially inward from the second connecting surface section 433, and a third abutting surface section 436 connecting between the first abutting surface section 434 and the second abutting surface section 435.

[0036] The first abutting surface section 434, the second abutting surface section 435 and the third abutting surface section 436 cooperate to define the mounting ring groove 44.

[0037] Refer to Figure 2 , Figure 7 and Figure 9 , the third abutting surface section 436 has a first groove width W1 ( Figure 7 ) on the first cross-section S1, and the third abutting surface section 436 has a second groove width W2 ( Figure 9 ) on the second cross-section S2.

[0038] The connecting portion 42 can be operated to deform between an unmounted state and a mounted state.

[0039] Refer to 7 and Figure 9, in the uninstalled state, the gas delivery pipe 4 is separated from the frame 2, the width W1 of the first groove is greater than the first hole diameter D1, and the width W2 of the second groove is less than the second hole diameter D2.

[0040] Refer Figure 8 to Figure 10 , in the installed state, the gas delivery pipe 4 is connected to the frame 2, the connecting portion 42 is compressed and deformed in the vertical direction Z, the connecting portion 42 is expanded and deformed in the left-right direction Y, and the installation convex portion 211 can be just stuck in the installation ring groove 44. At this time, referring to Figure 6 and Figure 7 referring Figure 9 to, the first abutting surface section 434 abuts against the rear side section 215, the second abutting surface section 435 abuts against the front side section 214, the third abutting surface section 436 abuts against the flat section 212, the width W1 of the first groove is slightly less than and approaches the first hole diameter D1, and the width W2 of the second groove is slightly less than and approaches the second hole diameter D2.

[0041] It should be noted that since the gas delivery pipe 4 is made of a flexible material, when the connecting portion 42 is compressed and deformed in the vertical direction Z, the connecting portion 42 can maintain a tendency to rebound in the vertical direction Z, so that the third abutting surface section 436 can always maintain a tendency to abut against the flat section 212 in the vertical direction Z, and the installation convex portion 211 can be firmly stuck in the installation ring groove 44.

[0042] Refer Figures 6 to 8 to, when the user wants to insert the gas delivery pipe 4 into the frame 2 in the front-rear direction X, the user needs to first apply a squeezing force to the connecting portion 42 in the vertical direction Z, so that the connecting portion 42 is compressed and deformed in the vertical direction Z and expanded and deformed in the left-right direction Y. At this time, the shape of the connecting portion 42 becomes elliptical to fit the shape of the air inlet hole 22. Then, the user needs to abut the annular inclined surface section 431 against the arc surface section 213 and apply a thrust force in the front-rear direction X, so that the installation convex portion 211 abuts against the annular inclined surface section 431 and the first connection surface section 432 in sequence. At this time, the connecting portion 42 is compressed and deformed in the vertical direction Z again and expanded and deformed in the left-right direction Y until the installation convex portion 211 is stuck in the installation ring groove 44, so that the connecting portion 42 is in the installed state.

[0043] It should be noted that due to the inclined design of the annular inclined surface section 431 and the smooth design of the arc surface section 213, the resistance when the connecting portion 42 is inserted into the air inlet hole 22 can be reduced.

[0044] When disassembling the gas delivery pipe 4, there are two operation methods.

[0045] The first operation method is to apply a squeezing force along the up-and-down direction Z to the connecting portion 42, causing the connecting portion 42 to be compressed and deformed along the up-and-down direction Z, so that the mounting ring groove 44 disengages from the engagement with the mounting protrusion 211 along the up-and-down direction Z. At this time, although the mounting protrusion 211 and the mounting ring groove 44 still maintain the engagement in the left-and-right direction Y, the user can still detach the air duct 4 from the frame 2 by applying a pulling force away from the frame 2 to the air duct 4. Refer to Figure 6 and Figure 7 , the principle of detaching the air duct 4 from the frame 2 by applying the pulling force is as follows: the rear side section 215 extends obliquely forward from the end connecting the annular wall 24, and the air duct 4 is made of a flexible material. Therefore, when a pulling force away from the frame 2 is applied to the air duct 4, the first abutting surface section 434 can move forward along the rear side section 215, and the rear end of the connecting portion 42 provided with the annular inclined surface section 431 will bend radially inward to disengage the mounting ring groove 44 from the mounting protrusion 211.

[0046] The second operation method is to directly apply a pulling force away from the frame 2 to the air duct 4 to detach the air duct 4 from the frame 2. However, since the mounting protrusion 211 is engaged in the mounting ring groove 44 in both the up-and-down direction Z and the left-and-right direction Y, the second operation method requires a greater pulling force than the first operation method to detach the air duct 4 from the frame 2.

[0047] To further confirm the pulling force required for the second operation method when detaching the air duct 4, the nasal mask 1 of the present invention is experimentally tested and obtained: the force for pulling the air duct 4 away from the frame 2 along the front-and-rear direction X is not less than 2.2 kgf, the force for pulling the air duct 4 away from the frame 2 along the direction forming a 45-degree angle with the left-and-right direction Y on the second cross-section S2 is not less than 1.4 kgf, and the force for pulling the air duct 4 away from the frame 2 along the direction forming a 45-degree angle with the front-and-rear direction X on the first cross-section S1 is not less than 0.6 kgf. And through experimental testing, when the user wears the nasal mask 1 to sleep, the maximum pulling force applied to the air duct 4 due to turning over is less than 0.6 kgf. Therefore, it can be ensured that when the user wears the nasal mask 1 to sleep, the air duct 4 will not detach from the frame 2.

[0048] In summary, for the nasal mask 1 of the present invention, by virtue of the second aperture D2 of the air inlet hole 22 being larger than the first aperture D1, the air duct 4 being made of a flexible material, and the connecting portion 42 being able to be installed in the air inlet hole 22 in a pluggable and detachable manner through deformation, the air duct 4 can be conveniently installed on the frame 2 and can be easily detached from the frame 2. In addition, there is no need to provide a bridging part between the air duct 4 and the frame 2, which can reduce the assembly and part costs. Therefore, the object of the present invention can be truly achieved.

[0049] However, the above are only examples of the present invention, and the scope of implementation of the present invention cannot be limited thereby. That is, all simple equivalent changes and modifications made according to the claims and the content of the specification of the present invention still fall within the scope of the present invention.

Claims

1. A nasal mask, characterized in that: Comprising: A frame, made of a rigid material, and including a main body, an air inlet hole penetrating the main body in the front-rear direction, and an annular wall extending rearward from the main body and surrounding the outside of the air inlet hole. The main body has a mounting convex portion that circumferentially defines the air inlet hole. The air inlet hole has a first hole diameter in a first cross-section perpendicular to the left-right direction, and the air inlet hole has a second hole diameter in a second cross-section perpendicular to the up-down direction. The second hole diameter is greater than the first hole diameter. The front-rear direction, the left-right direction, and the up-down direction are perpendicular to each other; A soft gasket, made of a flexible material and detachably mounted on the frame. The soft gasket includes a bladder defining a chamber, a sleeve hole formed on the front side of the bladder for sleeving on the annular wall, and an air suction hole formed on the rear side of the bladder. The chamber communicates the air inlet hole with the air suction hole; and An air delivery pipe, made of a flexible material and communicating with the chamber. The air delivery pipe includes a pipe body portion, and a connecting portion connecting the pipe body portion and deformable to be pluggably mounted on the air inlet hole. The connecting portion has an outer peripheral surface and a mounting ring groove formed on the outer peripheral surface. The mounting ring groove has a first groove width in the first cross-section and a second groove width in the second cross-section. The connecting portion can be deformed between an uninstalled state and an installed state. When the connecting portion is in the uninstalled state, the air delivery pipe is separated from the frame. The first groove width is greater than the first hole diameter, and the second groove width is less than the second hole diameter. When the connecting portion is in the installed state, the air delivery pipe is connected to the frame. The connecting portion is compressed and deformed in the up-down direction, and the first groove width is less than the first hole diameter. The connecting portion is expanded and deformed in the left-right direction, and the mounting convex portion is clamped in the mounting ring groove.

2. The nasal mask according to claim 1, wherein: The outer peripheral surface of the connecting portion has a ring inclined surface section opposite to the pipe body portion in the front-rear direction. The mounting convex portion has a flat surface section for defining the first hole diameter and the second hole diameter, and an arc surface section connected to the front side of the flat surface section.

3. The nasal mask according to claim 2, characterized in that: The mounting convex portion further has a front side surface section and a rear side surface section that are opposite to each other in the front-rear direction. The front side surface section is connected to the arc surface section, and the rear side surface section is connected to the flat surface section. The outer peripheral surface of the connecting portion further has a first connecting surface section connecting the annular inclined surface section, a second connecting surface section connecting the pipe body portion, a first abutting surface section extending radially inwards from the first connecting surface section, a second abutting surface section extending radially inwards from the second connecting surface section, and a third abutting surface section connecting between the first abutting surface section and the second abutting surface section. The first abutting surface section, the second abutting surface section, and the third abutting surface section cooperate to define the mounting ring groove. The third abutting surface section has the first groove width on the first cross-section and the second groove width on the second cross-section. When the connecting portion is in the mounted state, the first abutting surface section abuts against the rear side surface section of the mounting convex portion, the second abutting surface section abuts against the front side surface section of the mounting convex portion, and the third abutting surface section abuts against the flat surface section and the arc surface section of the mounting convex portion.

4. The nasal mask according to claim 1, characterized in that: When the connecting portion is in the mounted state, the first groove width is less than and approaches the first aperture diameter, and the second groove width is less than and approaches the second aperture diameter.

5. The nasal mask according to claim 1, characterized in that: The frame further includes a plurality of air outlet holes that penetrate the main body in the front-rear direction and communicate the outside with the chamber. The air outlet holes are distributed on the left and right sides of the air inlet hole.

6. The nasal mask according to claim 1, wherein: The frame further includes two positioning grooves formed on the left and right sides of the main body. The positioning grooves are open towards the rear. The soft gasket further includes two positioning posts formed on the left and right sides of the bladder. The positioning posts can be inserted into the positioning grooves towards the front.

7. The nasal mask according to claim 1, characterized in that: The ratio of the first aperture diameter to the second aperture diameter is between 0.58 and 0.

62.

8. The nasal mask according to claim 1, characterized in that: The force for pulling the air delivery pipe away from the frame in the front-rear direction is not less than 2.2 kgf. The force for pulling the air delivery pipe away from the frame at an angle of 45 degrees with the left-right direction on the second cross-section is not less than 1.4 kgf. The force for pulling the air delivery pipe away from the frame at an angle of 45 degrees with the front-rear direction on the first cross-section is not less than 0.6 kgf.

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