JP2008264026A - Cushion member for nasal mask and nasal mask using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hygiene nasal mask which shows excellent wearing stability when worn by a Japanese, develops little air leakage, and is easy to wash and dry. <P>SOLUTION: The nasal mask covers at least the nose of a user 1 for supplying respiration gas. The nasal mask comprises a cushion member 10 formed as a whole in a polygonal ring so as to encircle the surroundings of the nose of the user 1 and a mask shell 11 which has an inlet 14 for introducing the respiration gas and is fitted with the cushion member 10. The cushion member 10 contains a thin film section 25 that contacts the surroundings of the nose of the user 1 and a supporting section 26 that supports the thin film section 25. The thin film section 25 is formed in a wavy structure in the circumference so that the surface of the thin film section contacting the surface of the face forms concavities and convexities corresponding to the shape of the face. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a respiratory nasal mask, and in particular, is used for CPAP (Continuous Positive Airway Pressure) therapy suitable for the treatment of sleep apnea syndrome, NPPV (Noninvasive Positive Pressure Ventilation) therapy suitable for ventilation failure, etc. This is related to a nasal mask with a shape and size suitable for Japanese people.

In order to treat patients with sleep apnea syndrome, nasal continuous positive airway pressure addition therapy CPAP (Continuous Positive Airway Pressure) is performed, and a positive pressure of about 4 to 20 cmH ₂ O is applied to the nostril of the user during sleep. A respiratory assistance device (hereinafter also referred to as “CPAP device”) to which air is supplied is employed.

  In using such a device, various mask means for applying a positive pressure continuously to the nostril have been developed.

  Many off-the-shelf nasal masks do not reflect the shape of the user's nose and surroundings, and when positive pressure gas is supplied during wearing, gas leaks from the interface between the nasal mask and the face. It has the problem that it is easy to do. In particular, there are many leaks from the user's nose root and nose wings, and particularly when the user moves his / her head by turning over or the like, the leaks from the nose wings increase.

  In addition, even in nasal masks using thin films that can be easily deformed, the shape does not reflect the shape of the nose and the periphery of the nose. Habits will occur. Even if the positive pressure gas is supplied into the nasal mask, the wrinkles generated in the thin film are not easily lost, and gas leakage occurs through the wrinkles.

  For this problem, it is possible to temporarily prevent gas leakage from the interface between the nose mask and the face by pressing the nose mask strongly against the face, but the user's nose mask wearing site is damaged, Long-term use becomes impossible.

  Further, a nasal mask made of a relatively strong material so that the nasal mask is stable on the face damages the user's skin at the contact portion between the nasal mask and the face when worn.

  Therefore, as disclosed in Patent Document 1 below, a double structure having a rim inside the cushion is adopted to improve the airtightness of the mask, or as disclosed in Patent Document 2, a nasal mask is used. In order to prevent inhalation gas from leaking due to a gap between the face and the mask due to the movement of the user at the time of wearing the bed, a complicated structure including a gusset member is adopted.

In addition, the shape of nasal masks that are commonly used in Japan is designed and manufactured for Westerners, and problems such as pain and nasal root damage due to nasal masks have been reported (the following non-patent documents) Reference 1). In addition, when a Japanese wears a nasal mask designed and manufactured for Westerners, there is a problem that air leaks from the upper part of the nose, which hits the user's eyes and eyelashes, causing discomfort. Therefore, a nasal mask designed for Japanese has also been proposed (Patent Document 3 below).
JP 2004-41779 A JP 2005-537906 A Japanese Patent No. 3457964 Bulletin of the Japan Society of Mechanical Engineers, Bioengineering Division 29, (2000), P5-7, Teijin Limited, Shinichi Tsuji

  However, nasal masks need to be cleaned daily and sanitized for hygiene, especially when moisture remains in the mask, leading to bacterial growth and, in the worst case, bacterial infections. However, as in Patent Documents 1 and 2, a nasal mask having a double structure inside the cushion or provided with a gusset member has drawbacks that it takes time for cleaning and is difficult to dry. In addition, in the conventional nose mask, the angle of the forehead arm can be adjusted. However, when the mask is washed, the angle of the forehead arm is changed, and a trouble that requires adjustment again occurs.

  Furthermore, although the nasal mask of the above-mentioned patent document 3 is a nasal mask designed for the Japanese, it is designed based on the shape survey of the lower part of the nose and the root of the nose and is based on the shape of the entire nose circumference. It is not a design. Also, the nasal mask of Patent Document 3 is a double-structured nasal mask in which a thin film and a mask holding elastic body are combined, and there are many parts to be cleaned.

  The present invention has been made to solve such a problem, and when used by a Japanese, it has good mounting stability, less air leakage, and is easy to clean and dry for a sanitary nasal mask. It is an object to provide a cushion member and a nasal mask using the cushion member.

  In order to achieve the above object, a cushion member for a nasal mask according to the present invention is a cushion member used for a nasal mask that covers at least a user's nose and supplies breathing gas, and surrounds the periphery of the user's nose. As a whole, it is formed in a polygonal ring shape, and has a thin film portion that contacts the periphery of the user's nose, a support portion that supports the thin film portion, and a region that gradually decreases in thickness from the support portion toward the thin film portion. The gist of the present invention is that it is configured to include a thickness reducing portion that connects the support portion and the thin film portion.

In order to achieve the above object, the nasal mask of the present invention is a nasal mask that supplies at least the user's nose and supplies a breathing gas, and has a polygonal annular shape as a whole surrounding the periphery of the user's nose. A formed cushion member and a mask shell to which the cushion member is attached by forming an inlet for introducing a breathing gas;
The cushion member is formed to have a thin film portion that comes into contact with a user's nose, a support portion that supports the thin film portion, and a region that gradually decreases in thickness from the support portion toward the thin film portion. The gist is that the support portion and the thin-film portion connecting the thin film portion are included.

  The present invention is formed and supported to have a thin film portion that contacts the periphery of the user's nose, a support portion that supports the thin film portion, and a region that gradually decreases in thickness from the support portion toward the thin film portion. Since it is configured to include a thickness reduction part that connects the skin part and the thin film part, when the thin film part comes into contact with the face, the thickness reduction part also deforms appropriately and fits closely to the face shape for stable wearing It has good performance, less air leakage, and even less pressure on the face when worn, greatly relieving facial pain and damage.

  In the present invention, when the thin film portion is formed in a wave shape in the circumferential direction so that the surface in contact with the face surface forms irregularities corresponding to the face shape, when the user wears the thin film portion, It fits snugly into the face shape, has good wearing stability, has less air leakage, and greatly reduces user pain and damage to the wearing part.

  In the present invention, when the unevenness corresponding to the face shape is set based on the average Japanese face data, the thin film portion follows the average Japanese face shape, so the Japanese wears it. In this case, the thin film portion fits closely to the face shape, so that the wearing stability is good, the air leakage is small, and the user's pain and damage to the wearing portion are greatly relieved. In particular, the adhesion of the thin film part to the nose root part and the face in the vicinity thereof is further improved, and it is possible to effectively prevent the leaked air from causing discomfort caused by the leaked air hitting the eyes and eyelashes. it can. Moreover, by setting based on the average face data of the Japanese, the cushion height is lowered, and it is possible to reduce the height by, for example, about 5 mm as compared with the existing nasal mask. As a result, the mask volume when wearing the mask can be made smaller than before, the breath exhaled by the user can be kept in the mask, and it can be discharged efficiently to the outside, improving the ventilation efficiency of the user To do.

  In the present invention, the unevenness corresponding to the face shape includes a first recess corresponding to the nose root, a second recess corresponding to the lower nose, and a first protrusion corresponding to the groove below the nose formed in the second recess. When the user includes a pair of second convex portions corresponding to the buttocks extending in the mouth angle direction from both nose wings and a pair of third concave portions corresponding to both cheeks on the nasal root side relative to the buttocks, When worn, the thin film fits snugly on the nose root, lower nose, groove below the nose, wrinkles extending from both nose wings in the mouth angle direction, and facial irregularities present on both cheeks on the nose root side. In addition, the wearing stability is good and the air leakage is small, so that the pain of the user and the damage of the wearing part are greatly relieved.

  In the present invention, when it is formed in a substantially pentagonal shape with the corner corresponding to the nasal root as a vertex, the nose from the nasal root to the left and right cheeks, the buttocks extending in the mouth corner direction from both nostrils, and the nose to the lower nose At the peripheral part, the thin film part can be easily formed in a wave shape along the irregularities formed on the face surface, and when the user wears it, the thin film part fits closely to the face shape and wear stability is good and air There are few leaks, and the pain of the user and damage to the wearing part are greatly relieved. In addition, the mask volume when wearing the mask can be made smaller than before, the breath exhaled by the user can be kept in the mask, and it can be efficiently discharged to the outside, improving the ventilation efficiency of the user .

  In the present invention, when the thin film portion is curled toward the inside and has a single-sheet structure, the single-layer structure instead of the conventional double structure makes cleaning extremely easy. Therefore, it can be dried reliably in a short time, prevents bacterial growth due to lack of washing and residual moisture, and can be used very hygienically. Further, since the thin film portion is curled inwardly, when the thin film portion contacts the face, the thin film portion is appropriately deformed and fitted to fit the face shape. In addition, the pressure on the face when worn is extremely low, and facial pain and damage are greatly relieved.

  In the present invention, when a cut groove capable of improving the flexibility is formed in at least a part of the thickness reduction portion, the thickness reduction portion is also appropriate when the thin film portion contacts the face. In addition to a perfect fit to the face shape, the pressure on the face when worn is further reduced, greatly reducing facial pain and damage.

  In the present invention, the corner portion corresponding to the nasal root portion has a small thickness reduction portion, and when the portion is formed of a thin film, the nasal root portion has a particularly large local bulge, Since there is a hard nasal bone, by reducing the thickness reduction part at the corner corresponding to this part and forming it with a thin film, pressure on the nasal root part is greatly relieved and facial pain and damage are greatly reduced. Can be relaxed. Further, the adhesion of the thin film portion to the face from this portion can be further improved, and it is possible to effectively prevent the air from leaking and causing the unpleasant feeling that the leaked air hits the eyes and eyelashes.

  In the present invention, when the thickness reduction portion is set so that the gap between the stepped portion and / or the cut groove is wide at a portion near the corner corresponding to the nasal root portion, the nasal bone near the nasal root portion is formed. In the corresponding part, widen the step of the thickness reduction part and the gap of the notch groove to make it easier to bend, greatly reducing pressure on the part and greatly reducing facial pain and damage Can do. Further, the adhesion of the thin film portion to the face from this portion can be further improved, and it is possible to effectively prevent the air from leaking and causing the unpleasant feeling that the leaked air hits the eyes and eyelashes.

  In the present invention, a forehead arm is provided in the vicinity of the corner corresponding to the nasal root of the mask shell so as to stabilize the mounting posture by contacting the forehead, and the forehead arm does not have an angle changing function. In addition, when a contact member having a different height is selectively attachable as a contact member that contacts the forehead, it does not have an angle changing function. Troubles that the angle of the arm changes and does not fit or readjustment can be completely prevented. In addition, by selectively attaching contact members having different heights, it is possible to secure the fit of the forehead arm and to stabilize the wearing posture of the nose mask.

  Next, the best mode for carrying out the present invention will be described.

  1 and 2 are diagrams showing an example of a nasal mask to which the present invention is applied. FIG. 1 is a side view showing a state where a nasal mask is mounted on the face, and FIG. 2 is a front view showing a state where the nasal mask is mounted on the face.

  The nasal mask is a nasal mask that covers at least the nose of the user 1 and supplies a gas for breathing. The cushion member 10 is formed in a polygonal ring as a whole so as to surround the nose of the user 1, and for breathing. And a mask shell 11 to which the cushion member 10 is attached.

  The mask shell 11 is formed in a substantially pentagonal shape when viewed from the front. The mask shell 11 is formed substantially symmetrically with a vertex disposed at a portion corresponding to the nasal root of the user 1. The mask shell 11 is formed with an introduction port 14 for introducing a positive pressure gas for breathing, and a gas introduction pipe 12 is connected to the introduction port 14. A gas supply tube 13 for supplying a positive pressure gas from a positive pressure gas supply device (not shown) is connected to the gas introduction pipe 12.

The gas introduction pipe 12 is bent so as to have a substantially inverted L shape, and a plurality of (two in this example) exhalation exhaust ports 17 extending in the left and right directions are formed in a slit shape at the bent portion. The exhaled breath exhaled by breathing is smoothly discharged to the outside of the mask shell 11. By setting the groove width of the slit of the breathing exhaust port to 1 mm ± 0.1 mm and the total slit area to 17.6 mm ² ± 2 mm ² , for example, in the case of a positive pressure of 10 cmH ₂ O, the sound pressure level is adjusted at the user's ear part. It can be suppressed to about 35 dB, and the exhaust sound does not disturb sleep.

  In the vicinity of the corner corresponding to the nasal root of the mask shell 11, a forehead arm 15 for stabilizing the wearing posture by abutting the forehead of the user 1 is provided. The forehead arm 15 extends from the vicinity of the nasal root of the user 1 toward the forehead with the nasal mask attached to the face of the user 1. The distal end portion is provided with a stabilizing plate 16 extending left and right so as to stabilize the wearing posture of the nasal mask when it comes into contact with the forehead of the user 1.

  A forehead cushion 18 is attached to the stabilizing plate 16 so as to stabilize the forehead arm 15 by abutting against the forehead, absorb the angle and dimensional mismatch with cushioning properties, and relieve the pain of the user 1. . The forehead arm 15 does not have an angle changing function, and a forehead cushion 18 as a contact member that contacts the forehead is attached in a replaceable manner. Thereby, it is comprised so that the forehead cushion 18 from which a height dimension differs can be selectively attached.

  FIG. 3 shows an example of two types of forehead cushions 18 having different height dimensions H. FIG. In this example, the forehead cushion 18 is formed in a hollow cylindrical shape, a contact surface 18a with the forehead is formed in a convex shape, and constricted portions 18b are formed on both side surfaces. As a result, deformation tolerance is ensured when the frame is in contact with the forehead, pressure on the face is relieved, and angular and dimensional mismatches are absorbed. In the figure, reference numeral 30 denotes an attachment projection for attaching the forehead cushion 18 to the stabilizing plate 16.

  The straps 19 and 20 are connected to the left and right sides of the stabilizing plate 16 of the forehead arm 15 and the left and right portions of the mask shell 11 that rise from the bottom of the substantially pentagon. The straps 19 and 20 are wound around the back of the head and a nasal mask attached to the face is pressed against the face to some extent so that it cannot be easily detached while sleeping.

  A D ring 21 formed in a substantially D shape is attached to the tip of the strap 20 attached to the left and right of the mask shell 11. The D ring 21 is locked to a hook member 22 formed in the vicinity of the left and right sides rising from the substantially pentagonal bottom of the mask shell 11. Thus, the strap 20 is allowed to move in the vertical direction of the face (arrow M in FIG. 2), and the nasal mask is prevented from being easily removed due to an unconscious facial movement while sleeping. In FIG. 1, the description of the straps 19 and 20, the D ring 21, and the hook member 22 is omitted.

  In FIG. 1, reference numeral 23 denotes an oxygen introduction pipe 23 for introducing a breathing gas having an increased oxygen concentration into the mask shell 11 as necessary, and is usually sealed with a plug member 23a.

  4 and 5 are views showing the cushion member 10 surrounding the nose of the user 1, FIG. 4 (A) is a side view, FIG. 4 (B) is a view seen from the face wearing side, FIG. (C) is a DD sectional view, FIG. 5 (A) is an AA sectional view, FIG. 5 (B) is a BB sectional view, and FIG. 5 (C) is a CC sectional view. is there.

  The cushion member 10 is made of an elastic material such as silicone rubber. And it forms in the shape of a substantially pentagonal shape with the corner corresponding to the nasal root as a vertex so as to surround the periphery of the nose of the user 1, and a substantially pentagonal opening 24 is formed inside to escape the nose. Has been. A thin film portion 25 that contacts the periphery of the user's nose, a support portion 26 that supports the thin film portion 25, and a support portion 26 that is formed so that the thickness gradually decreases from the support portion 26 toward the thin film portion 25. A thickness reducing portion 27 that connects the thin film portion 25 is provided.

  The support portion 26 is provided with an attachment groove 28 for attaching the mask shell 11 over the entire circumference on the end surface opposite to the face contact side. The cushion member 10 is detachably attached to the mask shell 11 by fitting an attachment protrusion (not shown) provided on the mask shell 11 into the attachment groove 28.

  The cushion member 10 has a thickness reducing portion 27 protruding from the outer peripheral side of the slightly thick support portion 26, and the thickness decreasing portion 27 gradually decreases so that the inner surface is displaced toward the outer peripheral surface side. Further, the thin film portion 25 is curled inward, and has a single-sheet structure as a whole. And the surface following the outer peripheral surface of the thin film part 25 curled inward is a contact surface 25 a that contacts the face of the user 1.

  Further, the thickness reducing portion 27 is gradually reduced in thickness, and a plurality of cut grooves 29 that can improve the flexibility are formed in each step portion along the circumferential direction, and this portion has a pleated appearance. It is formed to exhibit. As described above, since the plurality of slits 29 are formed in the thickness reducing portion 27, when the pressing force is applied to the cushion member 10 when the nasal mask is worn, the thickness reducing portion 27 bends and pressure on the face It is possible to relax and improve the adhesion.

  In this example, the thickness is reduced so that the inner peripheral surface of the thickness reducing portion 27 is gradually displaced toward the outer peripheral surface. Further, in this example, in the thickness variation direction of the thickness reducing portion 27, substantially the entire region is formed to be a region where the thickness is gradually reduced, but a portion thereof is a region where the thickness is gradually reduced. It only has to be. In this example, the cut grooves 29 are formed in all the step portions, but the cut grooves 29 may be provided in at least some of the step portions.

  Moreover, in this cushion member 10, the corner | angular part corresponding to the nose root part shown with the area | region K in FIG.4 (B) has the said thickness reduction | decrease part 27 small as shown in FIG.5 (C), The portion is formed by the thin film portion 25. By doing so, the flexibility of the region K corresponding to the nasal root portion where the hard nasal bone is present is improved, so that the pressure on the nasal root portion can be eased and the adhesion can be improved to prevent air leakage. It has become.

  Further, as shown in FIG. 6, the thickness reducing portion 27 has a gap between the stepped portion and / or the cut groove 29 in a portion near the corner corresponding to the nose root portion indicated by the region N in FIG. Is set to be wider than other areas. By doing so, the flexibility of the region N corresponding to the vicinity of the nasal root where a hard nasal bone is present can be improved, the pressure on the vicinity of the nasal root can be relieved and the adhesion can be improved to prevent air leakage. It is like that.

  FIG. 7 is a diagram illustrating a three-dimensional uneven shape of the contact surface 25a with the face of the thin film portion 25 of the cushion member 10, and FIG. 8 is an average face used as a reference when forming the uneven shape. It is a figure which shows data and a reference | standard curve.

  That is, in the cushion member 10, the thin film portion 25 is formed in a wave shape in the circumferential direction so that the contact surface 25a that contacts the face surface forms irregularities corresponding to the face shape. And the unevenness | corrugation corresponding to the said face shape is set based on Japanese average face data.

  More specifically, measurement of 3D face shape data of 11 males each in their 30s, 40s, and 50s who often have sleep apnea syndrome using a 3D measuring device (for example, VIVID910 manufactured by Konica Minolta Holdings, Inc.) The average face shape data was created. The measurement of 3D face shape data is performed, for example, by scanning the face to be measured with a slit-shaped laser beam using a laser beam cutting method, and receiving the reflected light with a CCD camera. Can be obtained by obtaining three-dimensional data. The average face shape data can be obtained by performing shape analysis with predetermined three-dimensional shape analysis software (for example, 3D-Ruggle manufactured by Medic Engineering).

  In the average face data, the height of four points around the nose (the center of the nose root, the side of the nose on one side, the side of the nose wing on the side of the nose, the center of the bottom of the nose) is measured. Curve data was obtained that passed through the upper part of the nose wing and the center of the lower part of the nose. FIG. 8 shows three-dimensional average face shape data and reference curves for men in their 30s, 40s and 50s.

  The reference curve was mirror-imaged so as to be symmetric, so that a substantially pentagonal nose circumference curve P was obtained. In the cushion member 10 of the present embodiment, as shown in FIG. 7, the contact surface 25 a that contacts the face surface of the thin film portion 25 has a wave shape in the circumferential direction so as to form irregularities corresponding to the nose circumference shape curve P. Is formed.

That is, in the cushion member 10, as shown in FIGS. 5 and 7, in a cross section following the thin film portion 25 curled inwardly from the thickness reducing portion 27, a predetermined dimension t is formed on the inner side from the outer peripheral surface of the thickness reducing portion 27. in the top surface vicinity of ₂ offset by the contact surface 25a, an offset position vertically above a predetermined size t ₁ from the apex of the contact surface 25a in contact with the face surface of the thin film portion 25 is the nasal peripheral shape curve P passes It is set to do. Thereby, the contact surface 25a which contacts the face surface of the thin film part 25 is formed in a wave shape in the circumferential direction so as to form irregularities corresponding to the nose circumference shape of the average face data. In this example, the predetermined dimension is set to t ₁ = t ₂ = 5 mm.

As described above, in the top surface vicinity of the contact surface 25a from the outer peripheral surface is offset by a predetermined distance t ₂ on the inner side of the thickness reduction portion 27, a predetermined dimension from the apex of the contact surface 25a in contact with the face surface of the thin film portion 25 by having a t ₁ offset position set so that the nose peripheral shape curve P passes, the thin film portion 25 and the thickness reduction portion 27 is a contact surface 25a with a certain degree flexed state to the nose peripheral shape curve P near Therefore, it is possible to absorb variations at each point, that is, individual differences in face shape, which is advantageous for preventing damage to the face and improving adhesion.

  7 corresponds to the region A corresponding to the nasal root of the cushion member 10, the region B corresponding to the lower nose, the buttocks extending in the mouth angle direction from both nose wings, and both cheeks on the nasal root side of the buttocks. For the region C to be processed, the uneven state is shown in which the top surface of the contact surface 25a of the thin film portion 25 is viewed from the side.

  As shown in FIG. 7, in the cushion member 10 of the present embodiment, the unevenness corresponding to the face shape includes a first recess 31 formed in a region A corresponding to the nasal root and a second recess 32 corresponding to the lower nose. The first convex portion 33 formed in the second concave portion 32 and corresponding to the groove portion under the nose, the pair of second convex portions 34 corresponding to the flange portions extending from both nose wings in the mouth corner direction, and the nose than the above-mentioned buttocks portion A pair of third recesses 35 corresponding to both root cheeks are formed.

  FIG. 9 shows a state in which the cushion member 10 formed as described above is attached to the face. By forming as described above, the cushion member 10 fits a Japanese face, which is advantageous for preventing damage to the face and improving adhesion.

  As described above, in the nasal mask of this embodiment and the cushion member 10 used therefor, the thin film portion 25 that contacts the periphery of the nose of the user 1, the support portion 26 that supports the thin film portion 25, and the support portion 26. Since the thin film portion 25 is formed so as to have a region where the thickness is gradually reduced toward the thin film portion 25 and includes the support portion 26 and the thickness reducing portion 27 that connects the thin film portion 25, the thin film portion 25 is formed on the face. The thickness reducing portion 27 is also deformed appropriately when contacting the face, and fits closely to the face shape, so that the wearing stability is good and there is less air leakage, and the pressure on the face when wearing is further reduced, and the face The pain and damage are greatly relieved.

  In addition, since the thin film portion 25 is formed in a wave shape in the circumferential direction so that the surface in contact with the face surface forms irregularities corresponding to the face shape, the thin film portion 25 is formed when the user wears it. It fits snugly on the face shape, has good wearing stability, has less air leakage, and greatly reduces user pain and damage to the wearing part.

  Moreover, since the unevenness | corrugation corresponding to the said face shape is set based on a Japanese average face data, since the thin film part 25 follows a Japanese average face shape, when a Japanese wears, The thin film portion 25 fits closely to the face shape, so that the wearing stability is good and the air leakage is small, so that the pain of the user and the damage to the wearing portion are greatly relieved. In particular, the adhesion of the thin film portion 25 to the nasal root portion and the face in the vicinity thereof is further improved, and it is possible to effectively prevent the leaked air from causing discomfort caused by the leaked air to the eyes and eyelashes. Can do. Moreover, by setting based on the average face data of the Japanese, the cushion height is lowered, and it is possible to reduce the height by, for example, about 5 mm as compared with the existing nasal mask. As a result, the mask volume when wearing the mask can be made smaller than before, the breath exhaled by the user can be kept in the mask, and it can be discharged efficiently to the outside, improving the ventilation efficiency of the user To do.

  The unevenness corresponding to the face shape is formed in the first recess 31 corresponding to the nose root, the second recess 32 corresponding to the lower nose, and the first recess corresponding to the groove under the nose. Since the projection 33 includes a pair of second projections 34 corresponding to the buttocks extending in the mouth angle direction from both nose wings, and a pair of third recesses 35 corresponding to both cheeks on the nasal root side relative to the buttocks, it is used. When worn by a person, the thin film portion 25 is perfectly fitted to the nasal root, lower nose, groove below the nose, heel extending from both nostrils and the cheeks on both sides of the nasal root from the above heel. It fits and has good wearing stability and less air leakage, greatly reducing user pain and damage to the wearing part.

  In addition, because it is formed in a substantially pentagonal shape with the corner corresponding to the nose root as a vertex, in the left and right cheeks, the buttocks extending in the mouth corner direction from both nostrils, the nose peripheral part leading to the lower nose, It is easy to form the thin film portion 25 in a wave shape so as to follow the irregularities formed on the face surface. When the user 1 wears the thin film portion 25, the thin film portion 25 fits closely to the face shape and has good wearing stability and air leakage. The pain of the user and the damage to the wearing part are greatly relieved. In addition, the mask volume when wearing the mask can be made smaller than before, the breath exhaled by the user can be kept in the mask, and it can be efficiently discharged to the outside, improving the ventilation efficiency of the user .

  In addition, since the thin film portion 25 is curled inwardly and has a single structure, the single film structure is used instead of the conventional double structure, so that cleaning is extremely easy and the cleaning time is short. Can be reliably dried, prevent bacterial growth due to lack of washing and residual moisture, and can be used in an extremely hygienic manner. Further, since the thin film portion 25 is curled inwardly, when the thin film portion 25 comes into contact with the face, the thin film portion 25 is appropriately deformed and fitted to fit the face shape. In addition, the pressure on the face when worn is extremely low, and facial pain and damage are greatly relieved.

  Further, since the cut groove 29 capable of improving the flexibility is formed in at least a part of the step portion of the thickness reduction portion 27, the thickness reduction portion 27 is also appropriate when the thin film portion 25 contacts the face. In addition to a perfect fit to the face shape, the pressure on the face when worn is further reduced, greatly reducing facial pain and damage.

  In addition, the corner portion corresponding to the nasal root portion has a reduced thickness portion 27 and is formed of a thin film. Therefore, the nasal root portion has a particularly large local bulge and a hard nasal bone. Therefore, by forming the thinned portion 27 as a thin film at the corner corresponding to this portion, the pressure on the nasal root is greatly relieved, and facial pain and damage are greatly relieved. be able to. Further, the adhesion of the thin film portion 25 to the face from this portion can be further improved, and it is possible to effectively prevent the air leaking and causing the unpleasant feeling that the leaked air hits the eyes and eyelashes.

  Further, the thickness reducing portion 27 is set so that the gap between the stepped portion and / or the cut groove 29 is wide at the portion near the corner corresponding to the nasal root portion, and therefore corresponds to the nasal bone near the nasal root portion. In the portion, the gap between the stepped portion of the thickness reducing portion 27 and the cut groove 29 is widened to be easily bent, thereby greatly reducing pressure on the portion and greatly reducing facial pain and damage. Can do. Further, the adhesion of the thin film portion 25 to the face from this portion can be further improved, and it is possible to effectively prevent the air leaking and causing the unpleasant feeling that the leaked air hits the eyes and eyelashes.

  Further, a forehead arm 15 for stabilizing the mounting posture by contacting the forehead is provided in the vicinity of the corner corresponding to the nasal root of the mask shell, and the forehead arm 15 does not have an angle changing function. At the same time, since the forehead cushion 18 having different heights can be selectively attached as a contact member that contacts the forehead, it does not have an angle changing function. Troubles that are lost or readjusted can be completely prevented. Further, by selectively attaching the forehead cushions 18 having different heights, it is possible to ensure the fit of the forehead arm 15 and to stabilize the wearing posture of the nasal mask.

It is a side view which shows one Embodiment of the nose mask of this invention. It is a front view which shows the said nose mask. It is a side view which shows a forehead cushion. It is a figure which shows one Embodiment of the cushion member of this invention. It is sectional drawing which shows the said cushion member. It is a partially broken perspective view which shows the said cushion member. It is a figure which shows the said cushion member. It is a figure which shows average face data and a reference curve. It is a partially broken perspective view which shows the state which mounted | wore the said cushion member.

Explanation of symbols

1: User 10: Cushion member 11: Mask shell 12: Gas introduction pipe 13: Gas supply tube 14: Inlet 15: Forehead arm 16: Stabilizing plate 17: Exhalation outlet 18: Forehead cushion 18a: Contact surface 18b: Neck Portion 19: Strap 20: Strap 21: D ring 22: Hook member 23: Oxygen introduction tube 23a: Plug member 24: Opening portion 25: Thin film portion 25a: Contact surface 26: Support portion 27: Wall thickness reducing portion 28: Mounting groove 29: Cut groove 30: Mounting protrusion 31: First concave portion 32: Second concave portion 33: First convex portion 34: Second convex portion 35: Third concave portion

Claims (11)

  A cushion member used in a nasal mask that covers at least a user's nose and supplies a breathing gas, and is formed into a polygonal ring as a whole so as to surround the user's nose and contacts the user's nose A thin-film portion, a support portion that supports the thin-film portion, and a thickness-decreasing portion that is formed to have a region that gradually decreases in thickness from the support portion toward the thin-film portion and connects the support portion and the thin-film portion. A cushion member for a nasal mask, comprising the nasal mask.   The cushion member for a nasal mask according to claim 1, wherein the thin film portion is formed in a wave shape in the circumferential direction so that a surface in contact with the face surface forms irregularities corresponding to the face shape.   The cushion member for nasal mask according to claim 2, wherein the unevenness corresponding to the face shape is set based on average Japanese face data.   The unevenness corresponding to the face shape includes a first concave portion corresponding to the nose root portion, a second concave portion corresponding to the lower nose portion, a first convex portion formed in the second concave portion and corresponding to the groove portion under the nose, and both nose wings 4. A cushion for a nasal mask according to claim 2, further comprising: a pair of second convex portions corresponding to a buttock extending in a mouth angle direction from the heel portion; and a pair of third concave portions corresponding to both cheeks on the nasal root side of the heel portion. Element.   The cushion member for nasal masks as described in any one of Claims 1-4 currently formed in the substantially pentagon shape which made the corner | angular part corresponding to a nasal root part the vertex.   The cushion member for a nasal mask according to any one of claims 1 to 5, wherein the thin film portion has a single-sheet structure as a whole curled toward the inside.   The cushion member for a nasal mask according to any one of claims 1 to 6, wherein a notch groove capable of improving flexibility is formed in at least a part of the step portion of the thickness reduction portion.   The corner part corresponding to a nasal root part is the cushion member for nasal masks as described in any one of Claims 5-7 in which the said thickness reduction part is small and the part is formed with the thin film.   The nose according to any one of claims 5 to 8, wherein the thickness reducing portion is set so that a gap between the stepped portion and / or the cut groove is wide at a portion near the corner corresponding to the nasal root portion. Mask cushion member. A nasal mask for supplying breathing gas covering at least the user's nose, and a cushion member formed as a whole in a polygonal shape so as to surround the periphery of the user's nose, and an inlet for introducing breathing gas And a mask shell to which the cushion member is attached,
The cushion member is formed to have a thin film portion that comes into contact with a user's nose, a support portion that supports the thin film portion, and a region that gradually decreases in thickness from the support portion toward the thin film portion. A nasal mask comprising a support portion and a reduced thickness portion connecting the thin film portion.   In the vicinity of the corner corresponding to the nasal root of the mask shell, a forehead arm is provided to stabilize the mounting posture by abutting the forehead. The nasal mask according to claim 10, wherein contact members having different heights can be selectively attached as contact members that contact each other.