CN101410148A - Nasal mask for ventilation - Google Patents

Abstract

According to the present invention, there is provided a nasal respiratory mask contacting with the face of a user for supplying respiratory positive-pressure gas to the nose of the user, comprising at least a part attached tightly to the face that is attached tightly to the face of the user; a frame-fitting part for fitting to a frame; and an elastic connecting part that connects elastically the part attached tightly to the face with the frane-fitting part, wherein a facial side of the elastic connecting part is kept apart from the frame-fitting part side thereof for a required distance even in the absence of applied respiratory positive pressure. The nasal respiratory mask has advantages that it can be worn in an appropriate position without applying positive pressure at the start of wearing, scarcely disturbs the visual field during wearing, and can prevent prolongation of the time required for drying or occurrence of unsanitary condition after routine cleaning by washing with water.

Description

Nasal mask for ventilation

Technical field

The present invention relates to the nasal mask for ventilation of use in CPAP (the Continuous Positive Airway Pressure) therapy of the treatment of apnea syndrome when being suitable for sleeping, the infull NIPPV that is suitable for taking a breath (the Nasal Intermittent Positive Pressure Ventilation) therapy etc.

Background technology

One of the effective method of Therapeutic Method as when sleep apnea syndrome has per nasal formula continuous positive pressure breathing method (CPAP).In this Therapeutic Method, adopt the respiratory assist system of when sleep, the nostril portion of user being supplied with the barotropic gas about 400～2000Pa.In recent years, also use lift-launch in treatment, automatically to regulate the device of the function of pressure according to the generation state of apnea.In addition, as one of effective method of the incomplete Therapeutic Method of ventilation, there is the intermitent positive pressure ventilation of per nasal formula to breathe method (NIPPV).In this Therapeutic Method, adopt the respiratory assist system of the nostril portion of user being supplied with the barotropic gas at the intermittence about 400～2400Pa.

Under the situation of using these devices to treat, for the malleation that supply with to continue to the nostril of user portion, general flexible pipe, the nasal mask for ventilation (being the nose cup pad) that uses the guiding barotropic gas, be used for nasal mask for ventilation is remained on the locational framework of regulation, the headgear that the nasal mask for ventilation that is fixed on the framework is close to face.About such nasal mask for ventilation, the leakage of the barotropic gas that disclose when not only static, the change in location of the cover framework when also preventing to move is brought and the sense of discomfort that prevents user etc. are the various structures of purpose.

For example, open the spy and to have proposed to have the elastomeric nasal mask for ventilation of Serpentis abdomen shape in the flat 11-000397 communique, in embodiment, put down in writing Serpentis abdomen shape with multistage.In addition, show in order to solve same problem, to have proposed the nasal mask for ventilation of one section Serpentis abdomen shape in 2003-535657 communique and the special table 2005-537906 communique the spy.If these nasal mask for ventilation are suitably installed in treatment, then the sense of discomfort of bringing for the leakage that prevents barotropic gas, the pushing of reduction cover has effect.

But,, need regulate and attach the belt length on headgear and nasal mask for ventilation suitably is close to face for these nasal mask for ventilation suitably are installed.This operation is carried out when beginning is installed, and the situation of regulating but do not apply malleation this moment is more.But, in treatment, having applied malleation and the Serpentis abdominal distention, the earth changes so installment state is compared when not applying malleation.That is, the installment state when malleation applies must be predicted when mounted and carry out the fastening adjustment of headgear that the fastening tension of headgear or the phenomenon of pine excessively often take place the result.As a result, there is excessive pushing to produce the situation that sense of discomfort or gas leakage increase etc. are in unsuitable situation, the effect that can not fully obtain medical treatment for a long time, need after applying malleation, carries out the situation of the fastening adjustment of headgear in addition once more because of cover.

In addition, it is the feature of these nasal mask for ventilation that health when following installation moves, but in order to guarantee that fully following health moves needed stroke, need make the Serpentis abdomen than in order to ensure being close to of nose periphery the size of needs stretch out (special table 2003-535657 communique, the special 2005-537906 of showing communique) laterally biglyyer or make the Serpentis abdomen and be multistage and framework is positioned at apart from (spy opens flat 11-000397 communique) on the face position far away.The former special constriction also adopt the visual field by day for the user of the infull patient's of ventilation non-intrusion type ventilation therapy, the situation that produces obstacle is in daily life also arranged.

In addition, usually these nasal mask for ventilation clean by washing daily, but this moment, the face of Serpentis abdomen inside contacted with bigger area, and the surface tension by water is close to mutually easily, moisture entrapment is in Serpentis abdomen inside, so spended time is also arranged in drying or be absorbed in the situation of antihygienic state.But,, in the prior art that with above-mentioned is representative, almost do not consider about such problem.

Summary of the invention

Each problem that conventional art had in view of the above, the problem to be solved in the present invention is as follows.

That is, provide a kind of solution

A) when beginning is installed, can not apply malleation and install very simply go up in position,

The situation of obstructing the view when b) as far as possible reducing installation,

C) prevent that drying time after the cleaning of daily washing from postponing and the generation of antihygienic situation,

D) in the function of keeping as nasal mask for ventilation, the nasal mask for ventilation of at least one problem in the lightweight within the bounds of possibility.

This problem is solved by the present invention of following record.

Promptly, the present invention is a kind of nasal mask for ventilation, be to contact with the face of user, be used for to the nose supply of breathing of user nasal mask for ventilation (being the nose cup pad) with barotropic gas, it is characterized in that, at least be close to part by the face of being close to the face of user, with be used for that nasal mask for ventilation is fixed on the framework mounting portion that the locational framework of regulation may close, and face is close to part divides formation with the elastic joint part that the framework mounting portion flexibly is connected, even do not applying breathing with under the state of malleation, face side that elastic joint part divides and framework mounting portion side are also left the distance that needs.

Here, so-called " elasticity connection ", be meant by the certain shape that keeps under the state that does not apply external force wanting, be the above-mentioned elastic joint part face side of dividing with framework mounting portion side leave the distance that needs state but when having applied external force than other structures partly more such shape or the material of earth deformation be connected.That is under the state that does not apply external force, be that the face of nasal mask for ventilation is close to part and framework mounting portion and is left the state of the distance of regulation, in other words is the state that the total length of nasal mask for ventilation is remained design load.This point is different clearly with the existing retractility nasal mask for ventilation of the state that becomes contraction under the state that does not apply external force.

On the other hand, under the state that has applied external force,, become to help the structure that nasal mask for ventilation is kept to the close property of face by also being that elastic joint part divides preferentially distortion among each one of nasal mask for ventilation.As such external force, comprise and the vertical composition of face, the composition parallel and their synthetic ingredient with face.

In addition, so-called " need distances ", be meant the distance of effect of the present invention of the easiness of the easiness of the suitable installation when can bring into play above-mentioned installation begins and washing.

Description of drawings

Fig. 1 is the figure that the structure of nasal mask for ventilation 1 in the past is described.

Fig. 2 is the key diagram that in the past nasal mask for ventilation 1, state that user is moved are installed.

Fig. 3 is the figure in nasal mask for ventilation 1 in the past, when beginning is installed in explanation.

Fig. 4 is the figure of the preference of explanation nasal mask for ventilation 2 of the present invention.

Fig. 5 is the figure of explanation as the miniaturization of the feature of nasal mask for ventilation 2 of the present invention.

Fig. 6 is the figure of explanation as the preference of the elastic joint part branch of the feature of nasal mask for ventilation 2 of the present invention.

Fig. 7 is the figure of explanation as the draining of the feature of nasal mask for ventilation 2 of the present invention.

Fig. 8 is the partial sectional view that the elastic joint part of the homogeneous thickness of expression nasal mask for ventilation of the present invention divides.

The partial sectional view of Fig. 9 nasal mask for ventilation of the present invention that to be inboard that face is close to the base part that the elastic joint part of part divides strengthen with rib.

The partial sectional view of Figure 10 nasal mask for ventilation of the present invention that to be inboard that face is close to the base part that the elastic joint part of part divides strengthen with rib.

Figure 11 is half partial sectional view than the nasal mask for ventilation of the present invention of other part wall thickness of face side that elastic joint part divides.

Figure 12 is half partial sectional view than the nasal mask for ventilation of the present invention of other part wall thickness of face side that elastic joint part divides.

Figure 13 is the curve chart of the deformation drag of the breathing of comparison diagram 8 and nasal mask for ventilation of the present invention shown in Figure 12 when applying with malleation.

Description of reference numerals

1 in the past nasal mask for ventilation

1a Serpentis abdomen shape elastomer

The 1b face is close to part

1c framework mounting portion

2 nasal mask for ventilation of the present invention

2a elastic joint part branch

The 2b face is close to part

2c framework mounting portion

The linking part of 2d 2a and 2b (boundary member P)

The linking part of 2e 2a and 2c (boundary member Q)

2f the 1st arc

2g the 2nd arc

2h the 3rd arc

3 frameworks

4 headgears

4a headgear band

5 flexible pipes

6 produce the respiratory assist system of barotropic gas

20 moisture

Distance between L 1b and the 1c

The full-size of La L

The minimum dimension of Lb L

Diameter of a circle when the D elastic part is expressed as the circular section

The specific embodiment

The present invention is a kind of nasal mask for ventilation, be to contact with the face of user, be used for to the nose supply of breathing of user nasal mask for ventilation with barotropic gas, it is characterized in that, at least be close to part by the face of being close to the face of user, be used for being installed in the framework mounting portion on the framework, and face is close to part divides formation with the elastic joint part that the framework mounting portion flexibly is connected, even do not applying under the state of breathing with malleation (only also showing as " malleation " in this manual), face side that elastic joint part divides and framework mounting portion side are also left the distance that needs.

As mentioned above, nasal mask for ventilation of the present invention elastic joint part proportion by subtraction face under the state that has applied external force is close to part and the framework mounting portion more preferably is out of shape, as the method that realizes this point, can enumerate the elastic joint part branch is made the shape of easy deformation, C word shape described later or only use the lower material of hardness etc. in elastic joint part divides for example, more preferably, also carry out the wall thickness adjusting that elastic joint part divides simultaneously.

In addition, need make face be close to part and framework mounting portion and compare with the elastic joint part branch and be difficult for distortion, but preferably have certain elasticity.

In nasal mask for ventilation of the present invention, preferably, the cross section with vertical of face that above-mentioned elastic joint part divides is the arcuation that is C word shape.Here, the protuberance of C word is towards the outside of cover.This nose cup can not become greater to more than the needs, and can shorten the distance from the face to the framework.Like this, can guarantee fully in order to follow the stroke that health moves and need.

In addition, in nasal mask for ventilation of the present invention, preferably, the cross section that above-mentioned elastic joint part divides at least by the 2nd arc of being close to the 1st arc that part connects from above-mentioned face, connecting from the said frame mounting portion and make above-mentioned the 1st arc and above-mentioned the 2nd arc between successive directly or indirectly the 3rd arc constitute, and the radius of the radius of radius ratio the 1st arc of the 3rd arc and the 2nd arc is big.Here, so-called " connecting indirectly ", be meant that above-mentioned the 1st arc and the 2nd arc are continuous via straight line portion.

The part that such nasal mask for ventilation can suppress to be equivalent to the Serpentis abdomen is suppressed at Min. to the overhang in the cover outside with blocking of the visual field, further reduces the sense of discomfort when installing.

And then, in nasal mask for ventilation of the present invention, preferably, above-mentioned elastic joint part is divided when above-mentioned face is close to portion boundary part P and above-mentioned elastic joint part branch and is contacted with the boundary member Q of said frame mounting portion, and above-mentioned boundary member P and boundary member Q are the shape of acute angle.The stickup that water after such nasal mask for ventilation can prevent to clean brings can suppress the generation of delay drying time and antihygienic situation as far as possible.

In addition, preferably lightweight in the scope that can keep its function of nasal mask for ventilation of the present invention.As being used for light-weighted general method, can consider to make the wall thickness attenuation of each parts, if but attenuation exceedingly, easy deformation when applying malleation then, result cause barotropic gas is close to the leakage of part from face the problem that produces.

As of the present invention one of preferred embodiment, can understand that it is effective that above-mentioned face is close to the method for the inboard of the base part that the elastic joint part of part divides strengthening by rib.That is, the base part inboard of dividing by the elastic joint part of only face being close to part becomes heavy wall with the rib shape, can dispose the parts that are restricted from the aspect of gross weight effectively.For the time of the assembling of saving parts, preferably that this flank is integrally formed, but also can for example connect by assembling or by the bonding parts of preparation in addition that engage.

As the additive method that is used for realizing the lightweight of nasal mask for ventilation simultaneously and the resistance of distortion when applying for malleation is kept, can enumerate its frame side of face sidepiece proportion by subtraction that above-mentioned elastic joint part divides and divide the nasal mask for ventilation of wall thickness relatively.Typically saying, is half nasal mask for ventilation than its half wall thickness of frame side of its face side.

At above-mentioned elastic joint part branch is to be connected to via the 3rd arc from the 1st arc under the situation of part of the 2nd arc, thereby preferably, half compares wall thickness relatively with other parts of the 3rd arc the face side of the face side of the 3rd arc part, particularly the 3rd arc.By such structure, also can realize simultaneously nasal mask for ventilation integral body lightweight, for the distortion resistance keep.

In addition, present inventors have changed a plurality of nasal mask for ventilation of the structure of the part of elastic joint part branch, particularly above-mentioned the 3rd arc or the base part inboard that face is close to elastic joint part branch partly slightly by preparation, with they comparative study, obtained such understanding.But, the deformation drag raising that the elastic joint part of being close to part and having distance from the face that leak to take place by change divides or face is close to part and the thickness face opposition side, make face be close to part is unexpected, also is difficult to after obtaining The above results logically to its explanation.

Wall thickness concrete thickness partly as such elastic joint part branch, illustration be 0.5～3mm, preferably 1.5mm, thin part are 0.2～1.5mm, the structure of 0.5mm preferably, but if those skilled in the art, then by serving as with this value, can determine the thickness of the independent condition that is suitable for providing most with reference to suitably test.

Can use other parts that method that the above-mentioned inboard of face being close to the base part that the elastic joint part of part divides strengthens by rib and the face sidepiece proportion by subtraction elastic joint part that this elastic joint part is divided divide method of wall thickness relatively simultaneously, such nasal mask for ventilation is particularly preferred.

The material of nasal mask for ventilation of the present invention has flexibility, so long as it is just passable to reach the material of the purpose of narrating previously, be not particularly limited, it all is that rubber structure is preferred that face is close to part, elastic joint part branch, framework mounting portion, and silicone rubber, wherein fluid silicone rubber is particularly preferred.The hardness of silicone rubber is brought into play the tracing ability that moves to health effectively for elastic joint part grades, preferably about 20～80ShoreA, more preferably about 30～50ShoreA.In addition, nasal mask for ventilation of the present invention also can be that above-mentioned face is close to the structure that part, elastic joint part branch, framework mounting portion are formed separately the back combination, but is preferably integrally formed.

Above-described nasal mask for ventilation of the present invention has effect, the effect of an above the following stated.

Promptly, the state that has applied malleation is less with the hood-shaped shape variation of the state that does not apply, even under the state that does not apply malleation, also form the total length (when promptly installing with the length vertical direction of face) of the nasal mask for ventilation of the state be equivalent to apply malleation, thereby the headgear band that can easily be used for obtaining suitable installment state is regulated.For example, the cross section of dividing at above-mentioned elastic joint part with vertical of face is under the situation of C word shape toward the outer side, does not also keep the state that is expanded to C word shape even do not apply malleation.

In addition, if in treatment nasal mask for ventilation is applied malleation, the masterpiece that then the face portion of being close to is pressed against the direction on the face is used in the cover face to be close on portion and the elastic joint part, and close property further improves.

In addition, in small-sized, can guarantee fully in order to follow the stroke that health moves and need.

In addition, the effect that also has the generation that can as far as possible suppress delay drying time and antihygienic situation.

In addition, under the situation of suitableization of shape that the elastic joint part that makes nasal mask for ventilation of the present invention divides, can keep resistance making the whole light-weighted while of nasal mask for ventilation, barotropic gas is close to the leak suppressing of part in Min. from face for distortion.

Embodiment

Then, illustrate in greater detail concrete example of the present invention, but the present invention is not limited by these concrete examples with reference to accompanying drawing.

At first, the structure during in the past the use of nasal mask for ventilation of expression among Fig. 1.

In Fig. 1, the nasal mask for ventilation of being made by the softish material of silicone rubber etc. 1 is by being used for that its framework 3 is installed and being used for utilizing the headgear 4 of the fixed in shape framework 3 of head to keep going up in position.In addition, the respiratory assist system 6 that produces barotropic gas is connected with the flexible pipe 5 that will be directed into framework by the barotropic gas that respiratory assist system 6 produces and uses.Set up Serpentis abdomen shape elastomer 1a on nasal mask for ventilation 1, so that also keep when user is moved and being close to of face, under the state that has applied malleation, face is close between part 1b and the framework mounting portion 1c and is left distance L.

In above structure, when user was moved, Serpentis abdomen shape elastomer 1a brought into play function as designing, be deformed into state as shown in Figure 2.At this moment, face is close to part 1b and framework and is close to the direction that the distance between the part 1c moves according to health and varies to minimum dimension Lb from full-size La.In addition, when face is close to part 1b and framework and is close to the distance of part 1c and is minimum dimension Lb, for explanation the elastomeric face of Serpentis abdomen is close to part 1b and framework mounting portion 1c in the accompanying drawings and leaves and describe, but in fact inner surface contacts with each other.

But, when beginning is installed owing to be the state that does not apply malleation, so as shown in Figure 3, Serpentis abdomen shape elastomer 1a becomes closing state, the distance that face is close to part 1b and framework mounting portion 1c equals minimum dimension Lb, at this state downward modulation section header cover band 4a, regulate the be close to degree of nose cup 1 to face.That is, the imagination user is applied in malleation, the Serpentis abdomen shape expansible state of elastomer 1a and regulate headgear band 4a, and situation about can not suitably regulate takes place in the result.Therefore, under the state that has applied malleation, regulate headgear band 4a once more, but owing to can not suitably install, so must be because of the uncomfortable state of over-drastic pushing of cover or because of on being close to of face, insufficient barotropic gas that leaks touched eyes etc., regulating under the uncomfortable state.And, because face is close to the intermediary size that does not have benchmark that distance L between part 1b and the framework mounting portion 1c is adjusted to full-size La and minimum dimension Lb, so user judges whether suitable and is not easy.

With respect to this, as shown in Figure 4, nasal mask for ventilation of the present invention is characterised in that, even under the state that does not apply malleation, also is close at face and can not damage the desired tracing ability that moves to health when leaving distance L between part 2b and the framework mounting portion 2c.

So, divide the details of 2a to describe to the elastic joint part of the distinctive part of conduct of nose cup 2 of the present invention by Fig. 4.As shown in Figure 4, the cross section that elastic joint part divides 2a preferably to describe to be the independent arc of C word shape or connected a plurality of arcs, thus, with the cross section with identical wall thickness is that the Serpentis abdomen shape elastomer 1a in the past of collinear " く " word shape compares, and is close between part 2b and the framework mounting portion 2c at face under the state that does not apply malleation easily and leaves distance L.This distance L is preferably 5mm～20mm, and then, when 12mm～20mm, bring into play its effect best.

In addition, by the miniaturization of Fig. 5 explanation as the nose cup of one of feature of the present invention.In nose cup 1 in the past, for being close between part 1b and the framework mounting portion 1c, face obtains ultimate range La, be close between part 1b and the framework mounting portion 1c under the state of contact at face, Serpentis abdomen shape elastomer 1a expands laterally, about outstanding laterally La/2 (with reference to double dot dash line).But, in nasal mask for ventilation 2 of the present invention, because elastic joint part divides 2a to describe arcuation, so, be close to the circular section that demonstrates the sealing of diameter D between part 2b and the framework mounting portion 2c under the state of contact at face in order to obtain ultimate range La equally.That is, laterally be expanded into La=π D, for just enough about La/3.

And then, as shown in Figure 6, divide the arc in the cross section of 2a to constitute by the 1st arc 2f, the 2nd arc 2g and the 3rd arc 2h by making the formation elastic joint part, can make spring rate have variation.Particularly, if make the radius of the radius of radius ratio the 1st arc 2f of the 3rd arc 2h and the 2nd arc 2g big, then be close between part 2b and the framework mounting portion 2c under the state of contact, can make the La/3 under the situation that ratio laterally is made of an arc little at face.In the case, under situation about will be connected with collinear cross section between the 1st arc 2f and the 3rd arc 2h and the 2nd arc 2g and the 3rd arc 2h, also can access same effect as can be known.

Then, by Fig. 7 the draining as another feature of nose cup 2 of the present invention is described.Usually the hands of nose cup 2 usefulness user is implemented the cleaning of washing, is installed to once more on the framework 3 after moisture 20 is removed.In nose cup 1 in the past, the face of Serpentis abdomen inside is close to so the surface tension of residual moisture 20 is brought when often taking place to clean with the contact of bigger area under the state that does not apply malleation.In nose cup 2 of the present invention, be close to part 2b and framework mounting portion 2c leaves by face, water is difficult for remaining in elastic joint part and divides in the 2a.And then, since with this face be close to part 2b and elastic joint part divide the linking part 2d of 2a be boundary member P and framework mounting portion 2c to divide the linking part 2e of 2a with elastic joint part be that boundary member Q links with acute angle, can reduce surface tension by water residual when the cleaning significantly and make elastic joint part divide the 2a stickup, in drying, need the long period or become the probability of antihygienic state.

Then, illustrate face is close to the nasal mask for ventilation of the present invention that the inboard of the base part that the elastic joint part of part divides is strengthened with rib.The parts of the face side (i.e. the below of figure) that is connected with the elastic joint part branch (having represented to be connected to via the 3rd arc from the 1st arc the part of the 2nd arc here) of nasal mask for ventilation of the present invention shown in Figure 8 are homogeneous thickness roughly.With respect to this, in Fig. 9 and nasal mask for ventilation of the present invention shown in Figure 10, face is close to the inboard of the base part that the elastic joint part of part divides and is strengthened by rib (Tu Chu part to the left).In this manual, the base part that the face in the time of will being provided with this rib sometimes is close to the elastic joint part branch of part is recited as " support wall ".In addition, in the nasal mask for ventilation of Figure 10, it is big that near the wall thickness the face side end that elastic joint part divides becomes.

As the shape of such rib, being preferably its cross section is the rectangle of width 2mm to 6mm, height 1mm to 4mm.Wherein, the wall thickness of the height in rib cross section and support wall total is preferably 4mm to 8mm.

And then, half nasal mask for ventilation of the present invention than second half wall thickness of face side that elastic joint part divides is described.Structure shown in Figure 8 is the uniform structure of thickness that elastic joint part divides, and in Figure 11 and structure shown in Figure 12, the face side that elastic joint part divides half, promptly figure downside half than second half wall thickness.In addition, in Figure 11 and nasal mask for ventilation of the present invention shown in Figure 12, the inboard of being close to the base part that the elastic joint part of part divides at face as described above is provided with rib, but in the shape difference of both middle ribs.

Then, the inboard of being close to the base part that the elastic joint part of part divides with the nasal mask for ventilation of the present invention shown in Fig. 8, with face is strengthened with rib, and the deformation drag when half malleation than nasal mask for ventilation second half wall thickness, shown in Figure 12 of face side that elastic joint part divides is applied relatively, its result is illustrated in the curve chart of Figure 13.Transverse axis is represented malleation that nasal mask for ventilation is applied, and the longitudinal axis is represented percentage elongation.Here, so-called " percentage elongation " (% of unit), to have added its of state of malleation for " A ", facility as the certain position of the nasal mask for ventilation of the state that does not apply malleation of the nasal mask for ventilation of the object of measuring horizontal wide horizontal wide during for " B " establishing, and is the value with (B/A-1) * 100 calculating.Here, so-called " certain position horizontal wide ", divide with straight line in face is close to the roughly isosceles triangle identical faces that portion boundary part P describes, promptly with parallel corresponding to this leg-of-mutton limit of the part below the lip and when leaving the straight line of 30mm at the hypothesis and the elastic joint part of nasal mask for ventilation, be meant the length of the line segment of this leg-of-mutton other both sides separation of its quilt corresponding to the summit of nose bridge.

Here, the shape to relatively nasal mask for ventilation shown in Figure 8 and nasal mask for ventilation shown in Figure 12 describes.The shape of both framework mounting portions is identical, and the thickness of face contact site also is all 4mm basically, is all 10mm as the L of the distance between 2b and the 2c.But, the inboard of the base part of dividing except the elastic joint part at the latter's face contact site is provided with the rib in cross section of wide 5mm, height 2mm (adding up to 6mm with the thickness of support wall), elastic joint part with respect to the former is 0.7mm with half thickness of the framework mounting portion side of the latter's elastic joint part all, half thickness of the face contact site side of the latter's elastic joint part is 1.5mm, in this both differences.

According to Figure 13 as can be known, only make changing slightly apart from the shape of face than distally or elastic joint part of face contact site, the deformation drag the when malleation of nasal mask for ventilation applies will significantly be risen.

Industrial applicibility

According to the present invention, can be provided at exhaling of using in CPAP therapy and the NIPPV therapy etc. Smoke nose cup.

Claims (10)

1, a kind of nasal mask for ventilation, be to contact with the face of user, be used for to the nose supply of breathing of user nasal mask for ventilation with barotropic gas, it is characterized in that, at least be close to part by the face of being close to the face of user, survey the framework mounting portion of closing with the locational framework that is used for nasal mask for ventilation is fixed on regulation, and face is close to part divides formation with the elastic joint part that the framework mounting portion flexibly is connected, even do not applying breathing with under the state of malleation, face side that elastic joint part divides and framework mounting portion side are also left the distance that needs.

2, nasal mask for ventilation as claimed in claim 1 is characterized in that, the cross section with vertical of face that above-mentioned elastic joint part divides is the arcuation that is C word shape.

3, nasal mask for ventilation as claimed in claim 2, it is characterized in that, the cross section that above-mentioned elastic joint part divides at least by the 2nd arc of being close to the 1st arc that part connects from above-mentioned face, connecting from the said frame mounting portion and make above-mentioned the 1st arc and above-mentioned the 2nd arc between successive directly or indirectly the 3rd arc constitute, the radius of radius ratio the 1st arc of the 3rd arc and the radius of the 2nd arc are big.

4, as claim 2 or 3 described nasal mask for ventilation, it is characterized in that, above-mentioned elastic joint part is divided when above-mentioned face is close to portion boundary part P and above-mentioned elastic joint part branch and is contacted with the boundary member Q of said frame mounting portion, and above-mentioned boundary member P and boundary member Q are the shape of acute angle.

As each described nasal mask for ventilation in the claim 1～4, it is characterized in that 5, it is integrally formed that above-mentioned face is close to part, elastic joint part branch, framework mounting portion.

As each described nasal mask for ventilation in the claim 1～5, it is characterized in that 6, the distance of above-mentioned needs is below the above 20mm of 5mm.

As each described nasal mask for ventilation in the claim 2～6, it is characterized in that 7, the face sidepiece proportion by subtraction frame side that above-mentioned elastic joint part divides divides wall thickness.

8, as each described nasal mask for ventilation in the claim 2～6, it is characterized in that, the face side that above-mentioned elastic joint part divides half than half wall thickness of frame side.

As each described nasal mask for ventilation in the claim 2～8, it is characterized in that 9, above-mentioned face is close to the inboard of the base part of elastic joint part branch partly and is strengthened by rib.

10, nasal mask for ventilation as claimed in claim 9 is characterized in that, the cross section of above-mentioned rib is that width is 2mm to 6mm, highly is the rectangle of 1mm to 4mm.

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