JP6283325B2 - Gas supply mask device - Google Patents

Description

  The present invention introduces a gas such as oxygen gas into a mask body that can be worn on the mask wearer's head and a gas introduction space that exists between the mask wearer's face and the mask body. The present invention relates to a gas supply mask device such as an oxygen mask device having a gas introduction opening that can be used.

  As shown in FIG. 19 to FIG. 21, the applicant of the present application has already patented an oxygen mask device having the above-mentioned configuration as Japanese Patent Application No. 2014-121585 on June 12, 2014. I have applied. Note that the oxygen mask device (hereinafter referred to as “the oxygen mask device of the prior application”) 151 according to Japanese Patent Application No. 2014-121585 is an oxygen mask according to the first embodiment of the present invention shown in FIGS. The apparatus (hereinafter referred to as “the oxygen mask apparatus of the first embodiment”) does not include the flow path changing adapter section 40 included in the oxygen mask apparatus of the first embodiment. Only the real difference. In addition, in FIGS. 19-21, the code | symbol used in FIGS. 1-12 is used similarly.

  However, in the case of the oxygen mask device 151 of the prior application shown in FIGS. 19 to 21, the following phenomenon may occur. That is, in the oxygen mask device 151 of the prior application, in a normal use state where the flow rate of gases such as oxygen gas is not particularly high, noise generated inside the gas introduction connector portion 121 is generated by the mask wearer 2. In addition, it is difficult to be recognized as noise by surrounding people, and the flow direction of the gas flow from the gas introduction connector portion 121 is easily maintained in a preferable state. However, even in the oxygen mask device 151 of the prior application, in a use state where the flow rate of gases such as oxygen gas is relatively large, noise generated inside the gas introduction connector portion 121 causes the mask wearer 2 and While being easily recognized as noise by surrounding people, there is a high possibility that the flow direction of the gas flow from the gas introduction connector portion 121 is significantly changed from a preferable state.

  In the present invention, the above-described phenomenon in the oxygen mask device 151 of the prior application can be effectively corrected with a relatively simple configuration.

The present invention can introduce gases into a mask body that can be worn on the head of the mask wearer, and a gas introduction space that exists between the face of the mask wearer and the mask body. A connector part for introducing gases, and a tube part for supplying gas connected to the connector part for introducing gases in order to introduce gases into the connector part for introducing gases. in gases supply mask device, flow diversion adapter section having a baffle plate portion is provided therein Rutotomoni outside ambient apart from the inner circumferential surface of said gases introducing connector portion of the gases introduced connector portion further comprising a by gas flow gases to be introduced into the gases introduced connector portion from the gases supply tube portion comes into contact with the baffle plate portion of the flow path for changing the adapter unit The flow path of the gas flow inside the gas introduction connector portion is changed, and the flow rate of the gas flow inside the gas introduction connector portion is reduced. This relates to a gas supply mask device.

  In the first aspect of the present invention, the gas introduction connector section includes a first connector, a second connector, and a third connector, respectively, and the third connector includes the gas. The second connector is connected to the third connector, the first connector is connected to the second connector, and the gas supply tube portion is connected to the gas supply tube portion. Gases introduced into the third connector are configured to be sent from the third connector to the inside of the mask body through the second connector and the first connector in order, and the second connector. The lower cylindrical portion that extends substantially downward, and the lower cylindrical portion so as to extend in a state of being bent obliquely upward from the lower cylindrical portion. On being structured And a cylindrical portion, the flow path changing adapter portion is disposed in the third connector.

According to a second aspect of the present invention, in the second aspect, the flow path changing adapter section is configured to support the flow path changing adapter section on the gas introduction connector section. A substantially ring-shaped support part, such as a substantially annular shape, supported by the part, a plurality of connection parts extending substantially downward from the support part, and a lower end of the plurality of connection parts And baffle plate portions connected to each other, and a plurality of ventilation openings are respectively disposed between the plurality of connection portions. And this invention is comprised so that the said baffle board part may protrude in substantially cone shape, such as substantially cone shape toward the downward direction in the 1st aspect of the 2nd viewpoint. Further, in the second aspect of the second aspect of the present invention, the gas introduction when the gas is introduced from the gas supply tube portion into the internal space of the gas introduction connector portion. The opening area of the mouth is in the range of 5.2 to 10.4 mm ² (preferably in the range of 5.8 to 9.8 mm ² , more preferably in the range of 6.2 to 9.4 mm ² ), and opening area of the upper side of the opening of the central aperture formed by the inner periphery of the supporting portion of the flow diversion adapter unit is in the range (preferably 142～286Mm ^2, the range of 160～268Mm ^2, more preferably , 170-258 mm ² range).

According to a third aspect of the present invention, there is provided the gas introduction connector according to the third aspect of the invention, in order that the flow path changing adapter portion supports the flow passage changing adapter portion on the gas introduction connector portion. A plurality of mounting legs respectively provided on the part and baffle plate parts respectively connected to the plurality of mounting legs, and a plurality of ventilation openings for mounting the plurality of mounting legs. Arranged between the leg portions, a substantially ring-shaped gap is formed between the baffle plate portion and the gas introduction connector portion. In the first aspect of the third aspect of the present invention, the baffle plate portion is configured in a substantially flat plate shape. Furthermore, according to the second aspect of the third aspect of the present invention, the baffle plate portion protrudes in a substantially conical shape such as a substantially conical shape toward the upper side. Further, the area of the baffle plate portion seen in a plane (in other words, the area seen from the axial direction of the flow path changing adapter) is in the range of 160 to 268 mm2, preferably in the range of 170 to 258 mm2. More preferably, the area in the plan view of the gap existing between the baffle plate portion and the gas introduction connector portion is in the range of 30 to 52 mm 2 (preferably 32). In the range of ˜50 mm 2, more preferably in the range of 33 to 48 mm 2). In the third aspect of the third aspect of the present invention, the baffle plate portion is formed in a substantially semi-cylindrical shape such as a substantially semi-cylindrical shape, and the inner peripheral surface of the baffle plate portion is substantially While facing upward, the outer peripheral surface of the said baffle board part is comprised so that it may face substantially downward. In this case, the planar area of the baffle plate portion is in the range of 60 to 104 mm 2 (preferably in the range of 66 to 100 mm 2, more preferably in the range of 68 to 96 mm 2), and the baffle plate portion and the gas planarly viewed area of the gap that exists between the kind introduction connector portion is in the range of 128～216Mm2 (preferably in the range of 138～208Mm2, more preferably in the range of 142～200Mm2) preferably a .

  According to the first aspect of the present invention, in a normal use state in which the flow rate of gases such as oxygen gas is not particularly high, noise generated inside the gas introduction connector portion is generated by the mask wearer and surrounding people. There is almost no possibility of being recognized as noise, and the flow direction of the gas flow from the gas introduction connector portion is also kept as favorable as possible. Even when the flow rate of gases such as oxygen gas is sufficiently increased, the noise generated inside the gas introduction connector is not likely to be recognized as noise by the mask wearer and the surrounding people. In addition, there is little possibility that the flow direction of the gas from the gas introduction connector portion is significantly changed from a preferable state. Moreover, according to the invention concerning each of Claims 2-11, the effect show | played by the invention concerning Claim 1 can be reliably show | played with a comparatively simple structure.

It is a longitudinal cross-sectional view in the normal use state of the oxygen mask apparatus in the 1st Example which applied this invention to the oxygen mask apparatus. Example 1 It is an enlarged view of the connector vicinity of the oxygen mask apparatus shown in FIG. Example 1 It is a perspective view in the normal use state of the oxygen mask apparatus shown in FIG. Example 1 FIG. 4 is a perspective view similar to FIG. 3 of the oxygen mask device in a state in which the oxygen supply tube is rotated to the right. Example 1 FIG. 4 is a perspective view similar to FIG. 3 of the oxygen mask device in a state where the oxygen supply tube is turned to the left. Example 1 It is a longitudinal cross-sectional view of the oxygen mask apparatus shown in FIG. 1 in the state mounted on the horizontal surface. Example 1 It is a perspective view of the 1st connector shown in FIG. Example 1 It is sectional drawing along the AA line of FIG. Example 1 It is the elements on larger scale of FIG. Example 1 FIG. 8 is a perspective view showing a part of the first connector shown in FIG. Example 1 FIG. 3 is a perspective view of the flow path changing adapter shown in FIG. 2. Example 1 FIG. 3 is an enlarged cross-sectional view of the vicinity of a flow path changing adapter shown in FIG. 2. Example 1 It is a perspective view of the 3rd connector in the state which attached the adapter for flow-path changes by the 2nd Example which applied this invention to the oxygen mask apparatus. (Example 2) It is sectional drawing along the BB line of FIG. (Example 2) It is a perspective view of the 3rd connector in the state which attached the adapter for flow-path changes by the 3rd Example which applied this invention to the oxygen mask apparatus. (Example 3) It is sectional drawing along CC line of FIG. (Example 3) It is a perspective view of the 3rd connector in the state which attached the adapter for flow-path changes by the 4th Example which applied this invention to the oxygen mask apparatus. Example 4 It is sectional drawing along the DD line | wire of FIG. Example 4 It is a longitudinal cross-sectional view in the normal use state of the oxygen mask apparatus of the said prior application. (Prior Application 1) FIG. 20 is a longitudinal sectional view of the oxygen mask device of the prior application shown in FIG. 19 in a use state where the flow rate of gases is relatively increased. (Prior Application 1) FIG. 20 is a front view showing a gas flow of the gas in a state where the connector portion of the oxygen mask device of the prior application shown in FIG. 19 is rotated to the right and the flow rate of the gas is relatively increased. (Prior Application 1)

  Next, first to fourth embodiments in which the present invention is applied to an oxygen mask apparatus are described as “1, first embodiment”, “2, second embodiment”, “3, third embodiment”. ”And“ 4, the fourth embodiment ”, and will be described with reference to FIGS.

1. First embodiment

  The oxygen mask device according to the first embodiment of the present invention is described in “(1) Description of oxygen mask body”, “(2) First to fourth connectors, flow path changing adapter, and gas supply tube”. ”And“ (3) Description of the state of gas blowout from the gas supply tube to the mask body ”, and will be described with reference to FIGS.

(1) Description of oxygen mask body

  As shown in FIGS. 3 and 6, the oxygen mask device 1 as a gas supply mask device has a substantially central portion of the face 3 of the mask wearer 2 such as a patient (specifically, the nose portion 4 and A mask main body 6 capable of covering the mouth portion 5 and the peripheral portions thereof is provided. The mask body 6 may be integrally formed from a substantially transparent (in other words, translucent) soft synthetic resin such as soft vinyl chloride so as to have a substantially symmetrical shape. Then, at least the left and right side portions 11a and 11b of the outer peripheral portion 11 of the mask body 6 are substantially flat on the entire surface (in other words, the mask body 6 is directed upward on the horizontal plane 84 as shown in FIG. 6). (When placed, it is configured to be a substantially horizontal surface). Note that the upper portion 11c of the outer peripheral portion 11 may have a curved shape that protrudes slightly toward the outside so as to substantially correspond to the shape of the nose portion 4 of the mask wearer 2. The lower portion 11d of the outer peripheral portion 11 is a substantially flat surface substantially continuous with the left and right side portions 11a and 11b so as to correspond to the vicinity of the upper portion of the chin portion 12 of the mask wearer 2. However, it may be a curved shape that protrudes somewhat toward the front so as to correspond to the vicinity of the lower part of the jaw 12 of the mask wearer 2.

  Of the pair of left and right side end portions 11a and 11b of the outer peripheral portion 11 of the mask body 6, an intermediate portion in the substantially upper direction is left and right from the pair of left and right side end portions 11a and 11b as shown in FIG. Protruding portions 13a and 13b on both the left and right sides that protrude in a substantially trapezoidal shape such as a substantially isosceles trapezoidal shape are formed toward both outer sides. A pair of left and right insertion holes 15 to which the left and right ends of a flat rubber string 14 as a longitudinal attachment member having flexibility and elasticity are respectively inserted and attached to the left and right protrusions 13a and 13b. Are respectively disposed. Further, for example, three similar insertion holes 16 are sequentially arranged along the substantially vertical direction of the pair of left and right side end portions 11a and 11b. Further, each of the two end portions of the second rubber cord 17 which may be configured in the same manner as the rubber cord 14 is replaced with the rubber cord 14 or in addition to the rubber cord 14. Or may be attached to the pair of left and right side end portions 11a and 11b. A pair of upper and lower insertion slits 21 is provided in each of the pair of left and right side end portions 11a and 11b. The upper insertion slits of the pair of upper and lower insertion slits 21 are adjacent to the insertion holes 15 (in other words, the protruding portions 13a and 13b) in the substantially left-right direction. In addition, each of the both ends of the elastic bandage as the longitudinal mounting member having flexibility and elasticity is replaced with the flat rubber string 14 or in addition to the rubber string 14. It can be inserted into any one of the pair of left and right insertion slits and attached to the pair of left and right side end portions 11a and 11b. Each of the elastic bands 14, 17 and the elastic bandage passes through the left cheek, the back of the head, and the right cheek of the mask wearer 2, so that the head of the mask wearer 2 (in other words, a person, etc. (Including the face of the mask wearer 2) 18).

  A pair of left and right ventilation openings for ventilating the inside and the outside of the mask body 6, as shown in FIG. 3, FIG. 22a and 22b are respectively disposed. Each of the pair of left and right ventilation holes 22a and 22b is formed by the nostrils on both the left and right sides of the mask wearer 2 and the nostrils on both the left and right sides of the mask wearer 2 when the mask body 6 is worn on the mask wearer 2. Almost all of them are arranged at corresponding positions. The right vent hole 22b may have a substantially symmetrical shape with the left vent hole 22a. In addition, a connector mounting portion 25 for mounting the first and second connectors 23 and 24 is provided at a portion slightly below the center of the mask body 6. In addition, the connector mounting portion 25 is formed with an opening 26 that may be substantially columnar, such as a substantially cylindrical shape. The connector mounting portion 25 is disposed on the mask body 6 in a state where it is inclined with respect to the horizontal direction and the vertical direction of the mask body 6. And the said inclination direction of the connector attachment part 25 may be a direction which protrudes outside toward the upper direction from the downward direction.

Each of the pair of left and right ventilation holes 22a and 22b, each of which may be substantially triangular, has a substantially isosceles triangular shape with three corners rounded, as shown in FIGS. You can. Each of the pair of left and right ventilation holes 22a and 22b has a substantially intermediate height in the vertical direction of the nose 4 when viewed from the side when the mask body 6 is worn by the mask wearer 2. Then, it may extend to a position slightly below the mouth 5. In addition, as shown in FIG. 6, the sides 31 of the left and right sides 11a and 11b of the vent holes 22a and 22b having a substantially triangular shape such as a pair of left and right substantially isosceles triangles as shown in FIG. Are relatively adjacent to each other and extend substantially parallel to each of the left side portion 11a and the right side portion 11b. Each of the pair of left and right ventilation holes 22a and 22b extends from almost both ends of the base 31 extending substantially vertically in the mask body 6 to the middle in the left-right direction of the mask body 6. Then, the upper and lower ridge lines 32 and 33 are connected to each other. In the illustrated embodiment, the linear length L1 approximate to the bottom 31 of each of the left and right ventilation openings 22a, 22b is approximately 55 mm. Further, the height L2 of a substantially triangular shape such as a substantially isosceles triangle of each of the left and right ventilation openings 22a and 22b is approximately 35 mm. The ratio of the height L2 to the length L1 is approximately 0.65. Further, the opening areas S6 of the ventilation holes 22a and 22b on the left and right sides are approximately 950 mm ² . Furthermore, the numerical values of the length L1, the height L2, and the opening area S6 are generally in the ranges described in the following items (a) to (d) from the viewpoint of practicality. Is preferred:
(A) the length L1: in the range of 42 to 70 mm (more preferably in the range of 46 to 66 mm, most preferably in the range of 48 to 64 mm),
(B) the length L2: a range of 28 to 44 mm (more preferably, a range of 29 to 42 mm, most preferably a range of 30 to 40 mm),
(C) the ratio L2 / L1: in the range of 0.52 to 0.82 (more preferably in the range of 0.54 to 0.78, most preferably in the range of 0.56 to 0.76), and ( d) The opening area S6: a range of 630 to 1,260 mm ² (more preferably, a range of 760 to 1,180 mm ² , most preferably a range of 790 to 1,140 mm ² ).

  As shown in FIGS. 1, 6, and the like, the connector mounting portion 25 includes a substantially ring-shaped protruding wall portion 34 that protrudes toward the opening 26 so as to constitute the outer peripheral portion of the opening 26, and the protruding wall And a projecting wall portion 35, which protrudes outward from the vicinity of the outer periphery of the portion 34 and may be substantially cylindrical, such as a substantially cylindrical shape. Further, the connector mounting portion 25 (in other words, the substantially ring-shaped protruding wall portion 34 and the substantially cylindrical protruding wall portion 35) are inclined with respect to the horizontal direction and the vertical direction of the mask body 6, respectively. The mask body 6 is disposed. And the said inclination direction of the connector attachment part 25 may be a direction which protrudes outside toward the upper direction from the downward direction. Further, a second connector mounting portion 36 to which a gas concentration measuring tube (not shown) or the like can be connected is disposed substantially below the connector mounting portion 25 so as to be adjacent to the connector mounting portion 25. It is installed. The second connector attachment portion 36 includes an opening 37 that may be substantially circular. Further, the second connector mounting portion 36 (in other words, the opening 37) is slightly inclined with respect to the vertical direction. And the said inclination direction of the 2nd connector attachment part 36 may be a direction which protrudes outside a little toward the upper direction from the downward direction. The gas concentration measuring tube can be used to measure the concentration of gas such as carbon dioxide in the mask body 6.

(2) Description of the first to fourth connectors, the flow path changing adapter, and the gas supply tube

  As shown in FIGS. 1 and 6, the oxygen mask device 1 includes a first connector 23, a second connector 24, a flow path changing adapter 40 as a flow path changing adapter section, a third connector 41, A gas supply tube 42 as a gas supply tube portion and a fourth connector (not shown) are provided. Each of the first to fourth connectors 23, 24, 41 and the flow path changing adapter 40 is made of a substantially transparent (in other words, translucent) hard synthetic resin such as hard vinyl chloride. It may be integrally molded. Further, the gas supply tube 42 may be integrally formed from a substantially transparent (in other words, translucent) soft synthetic resin such as soft vinyl chloride. The first connector 23 may have a substantially cylindrical shape such as a substantially cylindrical shape extending substantially along the axial direction C1 of the first connector 23, as shown in FIGS. A gas supply cylindrical portion 43 as a second cylindrical portion, an upper end surface portion 44 that may be integrally disposed at the upper end of the cylindrical portion 43, and an axial direction from the vicinity of the upper end surface portion 44 A substantially inverted truncated cone shape (in other words, a substantially truncated cone shape that is substantially inverted in the axial direction C1) and a substantially inverted polygonal truncated cone shape (in other words, substantially integrally projecting upward along C1) For example, the gas rectification unit 45 such as a substantially inverted frustum shape (in other words, a substantially frustum shape substantially inverted in the axial direction C1) such as a substantially inverted frustum shape in the axial direction C1. And. In addition, an opening 46 for passing gases, which may be substantially circular or substantially polygonal, is disposed at a substantially central portion of the upper end surface portion 44. Further, an outward flange portion 51 that protrudes in a direction substantially orthogonal to the axial direction C1 and may be substantially ring-shaped is disposed on the outer periphery of the upper end surface portion 44. Further, the outer periphery of the mask body 6 in the axial direction C1 in the axial direction C1 than the outward flange portion 51 in the cylindrical part 43 (in other words, in the downward direction in FIG. 8) is in the axial direction C1. A second outward flange portion 52 is provided that protrudes in a substantially orthogonal direction and may have a substantially annular shape such as a substantially annular shape. The second outward flange portion 52 may have an inner diameter that is substantially the same as the inner diameter of the outward flange portion 51, and has an outer diameter that is sufficiently smaller than the outer diameter of the outward flange portion 51. It may be.

  As shown in FIGS. 7 to 10, the cylindrical portion 43 includes a plurality of four or the like, preferably at substantially equal intervals (for example, at approximately 90 ° intervals) along a substantially circumferential direction such as a circumferential direction. Each arm 53 for engaging the book is formed. Therefore, the cylindrical portion 43 has slits (in other words, cuts) extending from the lower end to the middle in the axial direction on both sides of a plurality of engagement arms 53 such as four. 54 are arranged. Further, engaging projections (in other words, engaging claws) 55 project from the outer surfaces of the lower ends of the engaging arms 53, respectively. In each of these engaging arm portions 53, only the engaging projection portion 55 is in the axial direction C <b> 1 (see FIG. 7) compared to the portion of the tubular portion 43 other than the engaging arm portion 53. It may protrude downward. When the first connector 23 is attached to the mask body 6, the tubular portion 43 of the first connector 23 is inserted into the opening 26 from the inside of the mask body 6. By this insertion, the second outward flange portion 52 gets over the annular projecting wall portion 34 of the mask body 6 by elastic deformation of the mask body 6 and the like. For this reason, the annular protruding wall portion 34 of the mask body 6 is sandwiched between the outward flange portion 51 of the first connector 23 and the second outward flange portion 52 of the first connector 23. The first connector 23 is attached to the mask body 6. Further, in the first connector 23, the reinforcing rib 56 extends over the inner peripheral surface of the cylindrical portion 43 and the outer surface in the axial direction C <b> 1 of the upper end surface portion 44 (in other words, the lower side). Are integrally formed and disposed. In the illustrated embodiment, four reinforcing ribs 56 are formed at substantially equal intervals.

  As shown in FIGS. 7 to 10 and the like, the gas rectification unit 45 having an inverted frustum shape or the like has a substantially hollow shape in which the upper side surface 61 in the axial direction C1 of the gas rectification unit 45 is opened almost entirely. It is configured in shape. Further, an inward flange portion 62 that may have a substantially ring shape such as a substantially annular shape or a substantially polygonal ring shape is provided on the lower end side in the axial direction C1 of the gas rectification portion 45. 45 may be formed integrally. Therefore, a lower end opening 64 having a substantially circular shape or a substantially polygonal shape is formed at the lower end portion of the gas rectifying unit 45 as a first gas introduction opening. Further, the gas rectification unit 45 is constituted by a plurality of (for example, four) support columns 63 integrally connected to the outer side surface of the gas rectification unit 45 and the upper side surface of the upper end surface portion 44, respectively. It is disposed on the upper side surface of the upper end surface portion 44. In addition, the support | pillar part 63 may be arrange | positioned at substantially equal intervals (in other words, substantially 90 degree intervals).

In the illustrated embodiment, the cylindrical portion 43 such as the substantially cylindrical shape of the first connector 23 shown in FIGS. 7 to 10 has an inner diameter L3 of about 15 mm and is long in the axial direction C1. The length L4 is approximately 9 mm, and the inner area in a direction substantially orthogonal to the axial direction C1 is approximately 176 mm ² . In the illustrated embodiment, the gas passage opening 46 of the first connector 23 has a diameter L5 of approximately 10 mm, and an opening area indicating the size of the opening 46 is approximately 78 mm ² . A substantially ring-shaped gas jet is formed between the upper end surface portion 44 and the gas rectifying portion 45 (in other words, the narrowest gap between the upper end surface portion 44 and the gas rectifying portion 45). The interval (in other words, opening width) L6 of the mouth 65 is approximately 0.7 mm in the illustrated embodiment. In addition, an angle θ1 formed by a direction C2 orthogonal to the gas outlet 65 serving as the second gas introduction opening and the axial direction C1 of the gas rectification unit 45 is approximately 50 °. The diameter L7 of the opening 64 is approximately 6 mm in the illustrated embodiment. Further, the inner peripheral diameter L8 of the upper side surface 61 of the gas rectification unit 45 is approximately 12 mm in the illustrated embodiment. And the diameter L9 of the lower surface 66 of the gas rectification | straightening part 45 is about 7.8 mm. Furthermore, the inclination angles of the inner peripheral surface 71 and the outer peripheral surface 72 of the gas rectifying unit 45 with respect to the axial direction C1 are approximately 30 °.

In general, the numerical values of the respective parts such as the inner diameter L3 relating to the first connector 23 are preferably in the ranges described in the following items (a) to (k) from the viewpoint of practicality:
(A) The inner diameter (in other words, the maximum length in a plan view of the inner peripheral surface) L3: a range of 10 to 20 mm (more preferably 11.5 to 18. In the range of 5 mm, most preferably in the range of 12.5 to 17.5 mm),
(B) Length L4 in the axial direction C1 of the substantially cylindrical portion 43 such as a substantially cylindrical shape: a range of 6 to 12 mm (more preferably, a range of 6.5 to 11.5 mm, most preferably 7.2 to 10.8 mm range),
(C) Inner area in a direction substantially orthogonal to the axial direction C1 of the substantially cylindrical portion 43 such as a substantially cylindrical shape: a range of 118 to 236 mm ² (more preferably, a range of 140 to 220 mm ² , most preferably Preferably in the range of 146 to 210 mm ² ),
(D) Diameter of gas passage opening 46 (in other words, maximum length in plan view of inner peripheral surface) L5: 8 to 12.5 mm (more preferably, 8.3 to 12 mm) Most preferably in the range of 8.6 to 11.6 mm),
(E) Opening area of the gas introduction opening 46: a range of 52 to 104 mm ² (more preferably, a range of 62.4 to 97.5 mm ² , most preferably a range of 65 to 93.6 mm ² ),
(F) Distance L6 between the substantially ring-shaped gas ejection ports 65: a range of 0.56 to 0.88 mm (more preferably, a range of 0.58 to 0.84 mm, and most preferably 0.6 to 0.8. range of 82mm ^2),
(G) Angle θ1 formed by the gas outlet 65 with respect to the axial direction C1 is in the range of 40 ° to 62 ° (more preferably in the range of 42 ° to 60 °, most preferably in the range of 44 ° to 58 °). ,
(H) The diameter of the lower end opening 64 of the gas rectifying unit 45 (in other words, the maximum length in a plan view of the inner peripheral surface) L7: a range of 4.8 to 7.6 mm (more preferably 5 to 5 mm). 7.2 mm range, most preferably 5.2-7 mm range),
(I) Inner diameter of upper surface 61 of gas rectifier 45 (in other words, the maximum length when the inner periphery of upper surface 61 is viewed in a plane) L8: range of 9.6 to 15 mm (more preferably 10 to 14.4 mm, most preferably 10.4 to 14 mm).
(J) Inner diameter of the lower surface 66 of the gas rectifier 45 (in other words, the maximum length when the inner periphery of the lower surface 66 is viewed in plan) L9: a range of 6.2 to 9.8 mm (further Preferably in the range of 6.5 to 9.4 mm, most preferably in the range of 6.7 to 9.1 mm), and (k) the inner peripheral surface 71 and the outer peripheral surface of the gas rectifying unit 45 with respect to the axial direction C1. 72 respective inclination angles: in the range of 24 ° to 37.5 ° (more preferably in the range of 25 ° to 36 °, most preferably in the range of 26 ° to 35 °).

  As shown in FIGS. 1, 6, and the like, the lower connector portion of the second connector 24 has a lower cylindrical portion 73 having a substantially cylindrical shape, such as a substantially cylindrical shape, to which the third connector 41 is attached. It is comprised as a cylindrical part. The lower cylindrical portion 73 extends substantially in the vertical direction in the state shown in FIG. The upper end portion of the second connector 24 is bent obliquely upward from the lower end portion of the second connector 24 so as to extend substantially along the axial direction C1. Yes. Further, the upper cylindrical portion 74 having a substantially cylindrical shape such as a substantially cylindrical shape as the second cylindrical portion near the upper end of the second connector 24 is a cylindrical portion 43 for supplying gases of the first connector 23. And a cylindrical protruding wall portion 35 of the mask body 6. By this insertion, the substantially ring-shaped upper wall portion 75 of the second connector 24 comes into contact with the lower end of the cylindrical protruding wall portion 35 of the mask body 6. Further, the engaging protrusion 55 of the engaging arm portion 53 of the first connector 23 engages with the lower surface of the substantially ring-shaped upper wall portion 75 in order to prevent it from coming off. As a result, the second connector 24 can be attached to the first connector 23 in a state where it is relatively easy to rotate with respect to the first connector 23. Further, as shown in FIGS. 1 to 3 and the like, the third connector 41 has a cylindrical part 76 having a large diameter and a bottom, and a bottom part of the cylindrical part 76 by integral molding or the like. A cylindrical portion 77 having a small diameter such as a connected cylindrical shape is provided. Note that a through hole 81 for communicating with the tubular portion 77 is formed at a substantially central position of the bottom portion of the tubular portion 76. Then, one end of the gas supply tube 42 is inserted into and connected to the small-diameter cylindrical portion 77. The upper end opening of the gas supply tube 42 communicates with a large-diameter cylindrical portion 76 serving as a third cylindrical portion via a through hole 81. Further, the fourth connector (not shown) is connected to the other end of the gas supply tube 42. The fourth connector can be connected to a gas cylinder (not shown) such as an oxygen cylinder or a gas supply nozzle (not shown) disposed in a hospital room or the like as necessary. .

  The axial direction C3 of the flow path changing adapter 40 is substantially coincident with the vertical direction (in other words, the substantially axial direction of the third connector 41) as shown in FIG. As shown in FIGS. 1, 11, 12, and the like, the flow path changing adapter 40 is integrated with a substantially annular support portion 101 such as a substantially annular shape, and substantially downward from the support portion 101. A plurality of connecting portions 102 such as four extending in parallel, and a baffle plate portion 103 integrally connected to the lower ends of the plurality of connecting portions 102 are integrally formed with each other. ing. In addition, a substantially convex flange portion 104 formed on the upper end side and an engagement groove portion 105 formed on the lower end side thereof are formed on the outer peripheral surface of the support portion 101 over substantially the entire surface. Has been. Therefore, a central opening 106 having a substantially circular shape is formed on the inner side surface of the support portion 101. Note that each of the plurality of connecting portions 102 is disposed at substantially equal intervals from each other when viewed from the axial direction C3. Further, in the illustrated embodiment, the plurality of connecting portions 102 are configured to have substantially the same shape. For this reason, a plurality of ventilation openings 111 such as four, which may be substantially the same, are formed between a plurality of connection portions 102 such as four. The plurality of ventilation openings 111 are arranged at substantially equal intervals as viewed from the axial direction C3. Further, each of the plurality of connecting portions 102 includes a vertical portion 112 extending substantially parallel to the axial direction C3, and is integrally connected to the vertical portion 112 and from the lower end of the vertical portion 112. And an inclined portion 113 extending substantially obliquely downward toward the axial direction C3. Each lower end of the inclined portion 113 is integrally connected to an outer periphery 103 a that may be substantially ring-shaped such as a substantially ring shape of the baffle plate portion 103. Further, the lower side surface 103b of the baffle plate portion 103 protrudes in a substantially conical shape such as a substantially conical shape toward the lower side. Furthermore, the upper side surface 103c, which may be a substantially conical concave portion of the baffle plate portion 103, is also a lower side surface (in other words, a substantially conical shape, such as a substantially conical shape, etc.) of the baffle plate portion 103 (in other words, The outer surface may be a recess that is recessed in a substantially conical shape such as a substantially conical shape toward the bottom so as to be substantially the same shape as the outer surface 103b. In this case, almost the entire baffle plate portion 103 may be configured to have substantially the same thickness.

(3) Explanation of the state of gas blowing from the gas supply tube to the mask body

  When the oxygen mask device 1 is mounted on the face 3 of the mask wearer 2 as shown in FIG. 1 and the like, the space (in other words, the face in the mask main body 6 from the gas rectifier 45 of the first connector 23). 3 (the gas introduction space existing between 3 and the mask body 6) 82 is directed in the direction of the gas flow 83 (in other words, the direction in which the upper surface 61 of the gas rectifying unit 45 faces) At least initially, it substantially coincides with the axial direction C1. Then, when the oxygen mask device 1 (in other words, the mask body 6) is placed face up on the horizontal plane 84 as shown in FIG. 6 (hereinafter referred to as “the mask placement state shown in FIG. 6”). The axial direction C1 extends substantially in the vertical direction of the mask body 6 (in other words, the oxygen mask device 1) in plan view. Therefore, the axial direction C1 is an imaginary bisection that bisects the mask body 6 (in other words, the oxygen mask device 1) shown in FIG. It almost coincides with the center line (in other words, the center line extending in the vertical direction of the mask body 6). For this reason, the angle formed by the two is substantially 0 ° in plan view. Moreover, in the mask mounting state shown in FIG. 6, the axial direction C1 is closer to the lower side portion 11d of the mask body 6 from the portion closer to the upper side portion 11c of the mask body 6 (in other words, the oxygen mask device 1). It extends in a straight line in an oblique direction so as to go to the part of the line and also slightly upward. The angle θ2 formed by the axial direction C1 and the horizontal plane 84 is approximately 45 ° when the mask body 6 is viewed from the side (in other words, in the mask placement state shown in FIG. 6). Further, FIG. 1 shows that a human having an average body shape and an average head shape (in other words, a mask wearer 2) correctly wears the oxygen mask device 1 (in other words, the mask body 6). The mask wearing state (hereinafter referred to as “the mask normal wearing state shown in FIG. 1”) facing the front is shown. 1 is that the oxygen mask device 1 is raised by approximately 90 ° compared to the state in which the oxygen mask device 1 is placed face up on the horizontal surface 84 as shown in FIG. Only the difference is substantially. Therefore, the horizontal plane 84 in FIG. 6 is replaced with a virtual vertical plane (in other words, a virtual vertical plane) 85 in FIG. Further, the angle θ2 in FIG. 6 is replaced with the angle θ3 in FIG. In general, each of the two angles θ2 and θ3 is preferably in the range of 30 ° to 60 °, more preferably in the range of 35 ° to 55 °, from the viewpoint of practicality. Most preferably, it is in the range of 40 ° to 50 °. The axial direction C1 is a virtual bisector centerline (in other words, the mask body 6 is divided into left and right halves when the mask body 6 (in other words, the oxygen mask device 1) is viewed from the front. The angle θ4 (not shown) formed with the bisector center line extending from the upper portion 11c side of the mask body 6 to the lower portion 11d side of the mask body 6 is viewed from the viewpoint of practicality. In general, it is preferably in the range of 0 ° to 15 °, more preferably in the range of 0 ° to 10 °, and most preferably in the range of 0 ° to 5 °.

  When the mask wearer 2 is wearing a mask wearing the oxygen mask device 1 as shown in FIGS. 1 and 3 and the like, when gases such as oxygen gas are supplied to the fourth connector, these gases Is sent from the fourth connector to the second connector 24 through the gas supply tube 42 and the third connector 41, respectively. Then, the gases sent to the second connector 24 are sent from the second connector 24 to the gas supply cylindrical portion 43 of the first connector 23. One half of the gas sent to the gas supply cylindrical portion 43 of the first connector 23 (hereinafter referred to as “the first gas”) includes a gas passage opening 46 and a lower end. The gas is rectified into the gas rectifier 45 through the openings 64, and is further sent into the mask body 6 from the upper side surface 61 through the gas rectifier 45. The other half of the gas (hereinafter referred to as “second gas”) is sent into the mask body 6 through the gas passage opening 46 and the gas outlet 65.

  As described above, the gas flow 83 of the first gas fed into the inside of the mask body 6 is axially directed from the gas rectifier 45 to the inside of the mask body 6 as shown in FIGS. It is sent out in a direction substantially along C1. Further, the gas flow 86 of the second gas is sent out from the gas passage opening 46 to the inside of the mask body 6 in a direction substantially along the orthogonal direction C2. Then, when the mask wearer 2 inhales, the gas flow 83 of the first gas is deflected toward the lower end of the nose of the mask wearer 2 as shown in FIG. Therefore, the mask wearer 2 can effectively suck the gas flow 83 of the first gas from the nose portion 4. On the other hand, the gas flow 86 of the second gas is affected by the presence of the outer peripheral surface 72 of the gas rectification unit 45 and the ejection direction of the gas ejection port 65 (in other words, the orthogonal direction C2). Therefore, at least when the mask wearer 2 inhales, the gas flow 83 of the first gas is not merged with an extremely large amount. The second gas stream 86 surrounds the outer circumference of the first gas stream 83 in a substantially ring-like manner with a certain distance, so that the first connector 23 is surrounded. It begins to flow away from. Further, when the gas flow 83 of the first gas and the gas flow 86 of the second gas flow as described above, when the mask wearer 2 inhales, etc. The person 2 can effectively suck both the first gas and the second gas from the nostril of the mask wearer 2. When the mask wearer 2 is not inhaling, the gas flow 86 of the second gas is substantially ring-shaped around the outer periphery of the gas flow 83 of the first gas. Surrounded by a shape. For this reason, it is possible to effectively prevent the first gas from leaking out of the mask body 6 through the pair of left and right vent holes 22a and 22b.

  As described above, the gas having a relatively small cross-sectional area sent from the gas supply tube 42 to the third connector 41 through the through-hole 81 of the third connector 41 at a relatively high speed is a flow path. The baffle plate portion 103 of the changing adapter 40 abuts on the lower side surface 103b. The gases are guided to the outer periphery 103 a of the baffle plate portion 103 while being in a substantially ring shape such as a substantially ring shape by the contact. For this reason, the substantially ring-shaped gas is guided from the ventilation opening 111 to the internal space 114 of the flow path changing adapter 40. The substantially ring-shaped gas is further substantially upward from the upper end 115 of the central opening 106 of the flow path changing adapter 40 while being in a substantially columnar state such as a substantially cylindrical shape having a relatively large cross-sectional area. Ascend at a relatively low speed. For this reason, the gas is in a substantially columnar state such as a substantially cylindrical shape having a relatively large cross-sectional area, and compared with the gas supplying cylindrical portion 43 of the first connector 23 as described above. Sent at low speed. Therefore, according to the gas introduction connector portion 121 configured by combining the first connector 23, the second connector 24, and the third connector 41 as shown in FIG. 1 and FIG. It is possible to achieve various effects. That is, even when a gas having a relatively small cross-sectional area is sent in a large amount at a high speed from the gas supply tube 42 to the connector portion 121, the gas flow of the gas is the gas of the first connector 23. It does not directly contact the supply tubular portion 43 but directly contacts the lower side surface 103 b of the baffle plate portion 103 of the flow path changing adapter 40. Then, a gas flow of a relatively low speed gas in a substantially columnar shape such as a substantially cylindrical shape comes into contact with the vicinity of the lower end of the gas supply cylindrical portion 43. Even if the gas flow directly contacts the lower surface 103 b of the baffle plate portion 103, this contact location is the lower end opening 64 of the gas rectifying portion 45 of the first connector 23 and the gas passage opening. Some distance from 46. The lower side surface 103b of the baffle plate portion 103 with which the gas flow first comes into contact has a conical shape such as a conical shape. Further, the gas flow of the gas comes into contact with the vicinity of the lower end of the gas supply cylindrical portion 43 at a relatively low speed in a substantially columnar state such as a substantially cylindrical shape having a relatively large cross-sectional area. For this reason, the noise generated by the gas flow of the gas inside the connector part 121 is not easily recognized as noise by the mask wearer 2 and surrounding people. Further, as described above, the gas flow of the gas comes into contact with the vicinity of the lower end of the gas supply cylindrical portion 43 at a relatively low speed. For this reason, even when a large amount of gas is fed into the connector portion 121 in a short time, the gas flow of the gas vigorously abuts on the cylindrical portion 43 of the first connector 23, thereby causing the gas flow. There is almost no possibility that the flow direction will be changed more than necessary. As described above, the flow path changing adapter 40 has a function of changing the flow path of the gas in the connector part 121, and as a result, a function of reducing the flow rate of the gas in the connector part 121. have. The flow path changing adapter 40 is detachably attached and fixed to the substantially ring-shaped cylindrical portion 76 by fitting the upper end portion of the substantially ring-shaped cylindrical portion 76 into the engaging groove portion 105. ing.

As described above, the noise generated by the gas flow of the gas inside the connector part 121 is less likely to be recognized as noise by the mask wearer 2 and the surrounding people, and the gas from the gas inlet connector part 121 In order to prevent the possibility that the flow direction of the flow is changed more than necessary, the oxygen mask device 1 has a function of changing the flow path of the gas flow of the gas and the flow velocity of the gas flow of the gas. It is preferable that the following configuration is provided so as to have a function of reducing the above. That is, the first element is a gas introduction port when gas is introduced from the gas supply tube 42 into the internal space 122 of the connector portion 121 (in the embodiment shown in FIGS. 1 to 12, The opening area S1 of the inner periphery 124 of the gas supply tube 42. The second element is the opening area S2 of the gas outlet central opening 106 of the flow path changing adapter 40. In the first embodiment shown in FIGS. 1 to 12, a plurality of pipes, such as four, are provided on the inner peripheral surface of the gas supply tube 42 which may have a substantially cylindrical shape such as a substantially cylindrical shape. A protrusion (not shown) for preventing crushing of the gas is provided so as to extend substantially in the length direction of the gas supply tube 42. Note that the gas supply tube 42 has an inner diameter of approximately 3.8 mm when the gas supply tube 42 is regarded as having no protrusion, and the width of each of the protrusions 42 is as follows. , Approximately 0.9 mm, and the protrusion height of each of the protrusions is approximately 1 mm. The opening area of the gas introduction port 124 (in other words, the opening area that decreases due to the presence of the protrusion) S1 is approximately 7.8 mm ² . Further, the diameter of the opening 125 on the upper end side of the central opening 106 such as a substantially circular shape for derivation of gases formed by the support portion 101 of the flow path changing adapter 40 is approximately 16.5 mm. The opening area S2 of the opening 125 on the upper end side is approximately 214 mm ² . Further, in the oxygen mask device 1 configured as described above, the flow path changing adapter for the inflow velocity V1 of the gases introduced from the gas introduction port 124 into the cylindrical portion 76 of the third connector 41. The ratio of the outflow velocity V2 of the gases flowing out from the 40 central apertures 106 and rising is approximately 0.03. Therefore, the outflow speed V2 of the gases that flow out of the central opening 106 of the flow path changing adapter 40 and rises is higher than the inflow speed V1 of the gases introduced into the cylindrical portion 76 of the third connector 41. Thus, it is reduced to approximately 1/32. In the first embodiment, the opening area S1 is generally preferably in the range of 5.2 to 10.4 mm ² from the viewpoint of practicality, and is preferably 5.8 to 9.8 mm. The range of ² is more preferable, and the range of 6.2 to 9.4 mm ² is most preferable. In the first embodiment, the opening area S2 is generally preferably in the range of 142 to 286 mm ² from the viewpoint of practicality, and more preferably in the range of 160 to 268 mm ^2. The range of 170 to 258 mm ² is most preferable.

  In a state where the gas supply tube 42 is not displaced to the left or right as viewed from the front as shown in FIG. 3, the second connector 24 is as shown in FIG. The first connector 23 is located almost directly below the lower end in the axial direction C1. However, when the gas supply tube 42 moves forward from the state shown in FIG. 3 to the right side of the mask body 6 as shown in FIG. 4 for some reason, the second connector 24 is connected to the first connector 23 (in other words, Then, it rotates in the clockwise direction in FIG. 4 with respect to the mask body 6). Accordingly, even in such a case, the gas supply tube 42 is not particularly twisted or bent, and maintains a substantially normal gas supply state. When the gas supply tube 42 moves back from the state shown in FIG. 4 to the state shown in FIG. 3, the second connector 24 is moved relative to the first connector 23 (in other words, the mask body 6). Then, it rotates backward counterclockwise in FIG. For this reason, even in such a case, the gas supply tube 42 is not particularly twisted or bent, and maintains a substantially normal gas supply state. Further, when the gas supply tube 42 is moved forward from the state shown in FIG. 3 to the left side of the mask body 6 as shown in FIG. 5 for some reason, the second connector 24 is not connected to the first connector 24. The connector 23 (in other words, the mask main body 6) rotates counterclockwise in FIG. For this reason, even in such a case, the gas supply tube 42 is not particularly twisted or bent, and maintains a substantially normal gas supply state. Then, when the gas supply tube 42 is moved back from the state shown in FIG. 5 to the state shown in FIG. 3, the second connector 24 is connected to the first connector 23 (in other words, the mask body 6). Then, it rotates backward in the clockwise direction in FIG. Therefore, even in such a case, the gas supply tube 42 is not particularly twisted or bent unnecessarily, and maintains a substantially normal gas supply state.

2. Second embodiment

  The oxygen mask apparatus 1 as the gas supply mask apparatus in the second embodiment shown in FIGS. 13 and 14 is described below with the oxygen mask apparatus 1 in the first embodiment shown in FIGS. Only the points to be made are substantially different. Therefore, in the second embodiment, description of substantially the same configuration and operational effects as those of the first embodiment described above will be appropriately omitted. That is, the flow path changing adapter portion 130 is formed in the through holes 132 as a plurality of leg mounting holes such as four formed in the bottom plate portion 131 of the third connector 41 shown in FIGS. The lower end portions of a plurality of mounting leg portions 133 such as four are fitted and fixed. Note that the plurality of mounting legs 133 may be integrally formed on the lower surface of the baffle plate part 134 for changing the flow path having a substantially flat plate shape such as a substantially disk shape. For this purpose, a plurality of ventilation openings 138 such as four, which may be substantially the same, are formed between the plurality of mounting legs 133. The plurality of ventilation openings 138 are arranged at substantially equal intervals from each other when viewed from the axial direction C3. Similarly to the case shown in FIGS. 1 and 3, when the mask wearer 2 is wearing the oxygen mask device 1, gases such as oxygen gas are supplied to the fourth connector. Then, the gases are sent from the fourth connector to the third connector 41 via the gas supply tube 42. Further, the gases having a relatively small cross-sectional area fed into the third connector 41 at a relatively high speed come into contact with the lower side surface 134a of the baffle plate portion 134 of the flow path changing adapter unit 130. Then, the gases move substantially horizontally toward the outer periphery 134b of the baffle plate portion 134. For this reason, the gases guided to the outer periphery 134b of the baffle plate portion 134 have a substantially annular shape formed between the outer periphery 134b and the inner peripheral surface 135 of the third connector 41. Ascending upward from the substantially ring-shaped gap 136. Therefore, the gases rise substantially upward of the upper side surface 134c of the baffle plate portion 134 of the flow path changing adapter portion 130 while being in a substantially columnar state such as a substantially cylindrical shape having a relatively large cross-sectional area. Therefore, also in this case, it is possible to achieve substantially the same operational effects as in the case of the first embodiment.

The opening area S1 of the gas introduction port 124 shown in FIG. 14 is approximately 7.8 mm ² as described in the first embodiment. Then, the diameter D1 of the inner peripheral surface 135 of the cylindrical portion 76 of the third connector 41, because it is almost 18 mm, cross-sectional area S3 of the inner peripheral surface of the cylindrical portion 76 is approximately 254 mm ^2. Moreover, since the diameter of the outer periphery of the baffle plate portion 134 of the baffle plate portion 134 of the flow path changing adapter portion 130 is substantially 16.5 mm, the area S4 of the baffle plate portion 134 seen in plan is almost equal to 214 mm ² . Therefore, the area S5 of the ring-shaped gap 136 such as a substantially ring shape existing between the baffle plate portion 134 and the large-diameter cylindrical portion 76 is approximately 40 mm ² in a plan view. Further, the inner circumferential surface of the cylindrical portion 76 has a substantially circular shape when viewed in plan, and the baffle plate portion 134 has a substantially circular shape when viewed in plan, and the width of the gap 136 is substantially the entire circumference. If it is almost uniform over the range, it is about 0.75 mm. The width of the gap 136 existing between the outer periphery 134b of the baffle plate portion 134 and the large-diameter cylindrical portion 76 that is substantially opposed to the outer periphery 134b is equal to the width of the outer periphery 134b of the baffle plate portion 134. Uniform size throughout. Accordingly, the width W1 of the gap 136 between the outer periphery 134b of the baffle plate portion 134 and the cylindrical portion 76 is approximately 0.75 mm. The preferred numerical range, the more preferred numerical range, and the most preferred numerical range of the opening area S1 of the gas introduction port 124 and the cross-sectional area S3 of the inner peripheral surface of the large-diameter cylindrical portion 76 are the second embodiment. However, it may be substantially the same as in the first embodiment described above. Moreover, the plan view, the area S4 in the baffle plate 134 is preferably in the range of 160～268Mm ^2, more preferably in the range of 170～258Mm ^2, in the range of 178～250Mm ² Is most preferred. Furthermore, the planarly viewed area S5 in the gap 136 existing between the baffle plate 134 and the cylindrical portion 76 is preferably in the range of 30～52Mm ^2, in the range of 32～50Mm ² Is more preferable, and the range of 33 to 48 mm ² is most preferable. In this case, the width of the gap 136 between the outer periphery 134b of the baffle plate portion 134 and the large-diameter cylindrical portion 76 that is substantially opposed to the outer periphery is substantially equal to the entire outer periphery 134b of the baffle plate portion 134. It is preferable that the size be such.

3. Third embodiment

  The oxygen mask device 1 as the gas supply mask device in the third embodiment shown in FIGS. 15 and 16 is described below with the oxygen mask device 1 in the second embodiment shown in FIGS. 13 and 14. Only the point to do may differ substantially. Accordingly, the description of the third embodiment regarding the configuration and the operation and effect substantially the same as those of the second embodiment described above will be appropriately omitted. That is, the baffle plate portion 134 of the flow path changing adapter portion 130 attached and fixed to the bottom plate portion 131 of the third connector 41 shown in FIGS. 15 and 16 is substantially flat in the second embodiment. However, in the third embodiment, it has a substantially conical shape such as a substantially conical shape. And this baffle board part 134 protrudes in cone shape, such as substantially cone shape, toward substantially upper direction. Further, the top portion 134d of the baffle plate 134 is rounded into a substantially spherical shape. For this reason, in the third embodiment, when the gases are fed into the third connector 41 via the gas supply tube 42, the gases are positioned below the baffle plate portion 134. The space that can be increased is larger than in the second embodiment. Therefore, also in the case of the third connector 41 in the third embodiment, noise generated by the gas flow of the gas inside the connector portion 121 is recognized as noise by the mask wearer 2 and the surrounding people. The possibility is almost the same as or less than that of the third connector 41 in the second embodiment.

The opening area S1 of the gas introduction port 124 shown in FIG. 16 is approximately 7.8 mm ² as described in the first and second embodiments. Since the diameter D1 of the inner peripheral surface 135 of the large-diameter cylindrical portion 76 of the third connector 41 is approximately 18 mm, the cross-sectional area S3 of the inner peripheral surface of the cylindrical portion 76 is approximately 254 mm ² . is there. Moreover, since the diameter of the outer periphery of the baffle plate portion 134 of the flow path changing adapter portion 130 is approximately 16.5 mm, the area S4 of the baffle plate portion 134 viewed in plan is that of the second embodiment. As described, it is approximately 214 mm ² . Accordingly, the area S5 of the substantially annular gap 136 existing between the baffle plate portion 134 and the cylindrical portion 76, such as the substantially annular shape, is viewed in plan view as described in the second embodiment. , Approximately 40 mm ² . The preferable numerical range, the more preferable numerical range, and the most preferable numerical range of the opening area S1 of the gas introduction port 124 are the same as those in the first and second embodiments described above in the third embodiment. And may be substantially identical. Further, the respective preferable numerical ranges of the area S4 viewed in plan of the baffle plate portion 134 and the area S5 viewed in plan of the gap 136 existing between the baffle plate portion 134 and the cylindrical portion 76, Each of the preferred numerical range and the most preferred numerical range may be substantially the same in the third embodiment as in the second embodiment described above.

4. Fourth embodiment

The oxygen mask device 1 as the gas supply mask device in the fourth embodiment shown in FIGS. 17 and 18 is different from the oxygen mask device 1 in the second embodiment shown in FIGS. Only the points described may differ substantially. Therefore, the description of the fourth embodiment regarding the configuration and the function and effect substantially the same as those of the second embodiment described above will be appropriately omitted. That is, the baffle plate portion 134 of the flow path changing adapter portion 130 attached and fixed to the bottom plate portion 131 of the third connector 41 shown in FIGS. 17 and 18 is substantially flat in the second embodiment. However, in the fourth embodiment, it is configured in a substantially semi-cylindrical shape such as a substantially semi-cylindrical shape. The baffle plate portion 134 has its inner peripheral surface facing substantially upward (in other words, the side substantially opposite to the bottom plate portion 131), and its outer peripheral surface substantially downward (in other words, bottom plate portion). (The side substantially facing 131). Further, each end portion 137 in the length direction of the baffle plate portion 134 is somewhat separated from the inner peripheral surface of the bottomed cylindrical portion 76 of the third connector 41 as shown in FIG. . Furthermore, the left and right side portions 138a and 138b of the baffle plate portion 134 have a sufficient space between the inner peripheral surface of the bottomed cylindrical portion 76. And the attachment leg part 133 is arrange | positioned at each corner vicinity of the lower side surface 134a of the baffle board part 134, such as substantially four corners.

The opening area S1 of the gas introduction port 124 shown in FIG. 18 is approximately 7.8 mm ² as described in the first to third embodiments. Since the diameter D1 of the inner peripheral surface 135 of the large-diameter cylindrical portion 76 of the third connector 41 is approximately 18 mm, the cross-sectional area S3 of the inner peripheral surface of the cylindrical portion 76 is approximately 254 mm ² . is there. Further, the length L10 of the baffle plate portion 134 of the flow path changing adapter portion 130 is approximately 15 mm when viewed in a plan view. Furthermore, the width (in other words, the diameter of the outer peripheral surface) L11 of the baffle plate portion 134 is approximately 5.5 mm when viewed in a plan view. And the diameter D2 of the internal peripheral surface of the baffle board part 134 is about 3.5 mm. Further, the area S4 of the baffle plate portion 134 viewed in plan is approximately 82 mm ² . Further, the area S5 of the ring-shaped gap 136 existing between the baffle plate portion 134 and the large-diameter cylindrical portion 76 is approximately 172 mm ² in plan view. The preferred numerical range, the more preferred numerical range, and the most preferred numerical range for the opening area S1 of the gas introduction port 124 and the cross-sectional area S3 of the inner peripheral surface of the large-diameter cylindrical portion 76 are the fourth embodiment. However, it may be substantially the same as in the second embodiment described above. Moreover, the plan view, the area S4 in the baffle plate 134 is preferably in the range of 60～104Mm ^2, more preferably in the range of 66～100Mm ^2, in the range of 68～96Mm ² Is most preferred. Furthermore, the planarly viewed area S5 in the gap 136 existing between the baffle plate 134 and the cylindrical portion 76 is preferably in the range of 128～216Mm ^2, in the range of 138～208Mm ² Is more preferable, and the range of 142 to ²⁰⁰ mm ² is most preferable.

  As mentioned above, although the 1st-4th Example of this invention was described in detail, this invention is not limited to these 1st-4th Example, It is described in the claim. Various changes and modifications can be made based on the spirit of the invention.

  For example, in the first embodiment described above, the flow path changing adapter 40 is attached and fixed to the third connector 41. However, the flow path changing adapter 40 is integrally formed with the third connector 41. It may be. This also applies to the second to fourth embodiments described above.

  In the third embodiment described above, the top part 134d of the baffle plate part 134 of the flow path changing adapter part 130 is rounded into a substantially spherical shape or the like. In the first embodiment described above, the lower end portion of the baffle plate portion 103 of the flow path changing adapter 40 is not rounded, such as a substantially spherical shape, and is sharpened downward. It protrudes at. However, the top portion 134d of the baffle plate portion 134 in the above-described third embodiment does not necessarily have to be rounded into a substantially spherical shape or the like, and may protrude in a sharp shape upward. The lower end portion of the baffle plate portion 103 does not necessarily have to protrude in a downwardly sharp shape, and may be rounded into a substantially spherical shape or the like.

  In the first to fourth embodiments described above, the cylindrical portion 73 is illustrated in a substantially cylindrical shape. And in the above-mentioned 1st Example, the support part 101 was illustrated in the substantially annular shape. Furthermore, in the above-described first embodiment, the baffle plate portion 103 is illustrated in a substantially conical shape. Further, in the above-described second embodiment, the baffle plate portion 134 is illustrated in a substantially disk shape. And in the above-mentioned 3rd Example, the baffle board part 134 was illustrated in the substantially cone shape. Further, in the above-described fourth embodiment, the baffle plate portion 134 is illustrated in a substantially semi-cylindrical shape. However, the cylindrical portion 73 in the first to fourth embodiments described above may be configured in a substantially polygonal substantially cylindrical shape such as a substantially hexagonal substantially cylindrical shape or a substantially octagonal substantially cylindrical shape. . Furthermore, the baffle plate portion 103 in the first embodiment described above may be configured in a substantially pyramid shape such as a substantially hexagonal pyramid shape or a substantially octagonal pyramid shape. Further, the baffle plate portion 134 in the second embodiment described above may be configured in a substantially polygonal plate shape such as a substantially hexagonal shape or a substantially octagonal shape. And the baffle board part 134 in the above-mentioned 3rd Example may be comprised by substantially pyramid shapes, such as a substantially hexagonal pyramid shape and a substantially octagonal pyramid shape. Further, the baffle plate portion 134 in the above-described fourth embodiment is substantially the lower half of a substantially polygonal substantially cylindrical body such as a substantially hexagonal substantially tubular body or a substantially octagonal substantially tubular body. Alternatively, it may be configured in a shape substantially corresponding to the upper half.

  In the first to fourth embodiments described above, each of the flow path changing adapter sections 40 and 130 includes a single baffle plate section 103 and 134. However, each of the flow path changing adapter units 40 and 130 is not necessarily provided with the single baffle plate portions 103 and 134, and the flow path changing adapter units 40 and 130 are connected to each other substantially vertically, for example. A plurality of baffle plate portions 103 and 134 such as two may be provided. Moreover, in the above-mentioned 1st-4th Example, each of the connector parts 121 is provided with the single flow-path change adapter parts 40 and 130. FIG. However, each of the connector parts 121 is not necessarily provided with a single flow path changing adapter part 40, 130, and a plurality of connector parts 121, for example, two arranged substantially vertically above and below each other. The flow path changing adapter units 40 and 130 may be provided.

  In the first to fourth embodiments described above, the first connector 23 is configured separately from the second connector 24. However, the first connector 23 can be configured integrally with the second connector 24.

  In the first to fourth embodiments described above, the third connector 41 is configured separately from the second connector 24. However, the third connector 41 can be configured integrally with the second connector 24.

  In the first to fourth embodiments described above, each of the pair of left and right ventilation openings 22a and 22b is configured in a substantially triangular shape having a substantially bilaterally symmetric shape. However, each of the pair of left and right ventilation openings 22a and 22b does not necessarily have a substantially triangular shape, and is substantially semicircular, substantially oval, substantially elliptical, or substantially polygonal (except for substantially triangular). Or other shapes.

  Furthermore, in the above-described first to fourth embodiments, the lower end opening 64 of the gas rectifier 45 is configured in a substantially circular shape. However, the lower end opening 64 does not necessarily need to be configured in a substantially circular shape, and may be a substantially polygonal shape such as a substantially hexagonal shape or a substantially octagonal shape, a substantially elliptical shape, a substantially oval shape, A substantially ring shape such as a ring shape may be used.

1 Oxygen mask device (mask device for gas supply)
2 Mask wearer 3 Face 6 Mask main body 23 First connector 24 Second connector 40 Channel changing adapter section 41 Third connector 42 Gas supply tube section 73 Lower cylindrical section (first cylindrical section) Part)
74 Upper cylindrical part (second cylindrical part)
76 Bottomed cylindrical part (first cylindrical part)
82 Gas introduction space 84 Horizontal plane 101 Support portion 102 Connection portion 103 Baffle plate portion 111 Ventilation opening 121 Gas introduction connector portion 122 Internal space 124 Gas introduction port 125 Opening 130 Flow path changing adapter portion 133 Mounting leg portion 134 Baffle plate portion 136 Almost ring-shaped gap 138 Ventilation opening S1 Opening area S2 Opening area S4 Opening area S5 Opening area

Claims (11)

A mask body that can be worn on the mask wearer's head;
A connector part for introducing gases into the gas introduction space existing between the mask wearer's face and the mask body;
In order to introduce gas into the gas introduction connector portion, a gas supply mask device comprising a gas supply tube portion connected to the gas introduction connector portion,
Further comprising a flow diversion adapter section having a baffle plate portion is provided therein Rutotomoni outside ambient apart from the inner circumferential surface of said gases introducing connector portion of the gases introduced connector portion,
The gas introduction connector is configured such that a gas flow of a gas introduced from the gas supply tube portion into the gas introduction connector portion abuts on the baffle plate portion in the flow path changing adapter portion . The gas flow path inside the unit is changed, and the gas flow rate inside the gas introduction connector unit is reduced. Mask device. The gas introduction connector portion includes a first connector, a second connector, and a third connector,
The third connector is connected to the gas supply tube portion;
The second connector is coupled to the third connector;
The first connector is coupled to the second connector;
Gases introduced into the third connector from the gas supply tube portion are sent from the third connector into the mask body through the second connector and the first connector in order. Configured to be
The lower tubular portion extends so that the second connector extends in a state of being bent downward and obliquely upward from the lower tubular portion extending substantially downward. An upper cylindrical part configured integrally with the part,
The gas supply mask device according to claim 1, wherein the flow path changing adapter unit is disposed in the third connector. In order for the flow path changing adapter section to support the flow path changing adapter section on the gas introduction connector section, a substantially ring-shaped support section supported by the flow path changing adapter section; A plurality of connecting portions extending substantially downward from the support portion, and a baffle plate portion connected to the lower ends of the plurality of connecting portions,
3. The gas supply mask device according to claim 1, wherein a plurality of ventilation openings are respectively disposed between the plurality of connecting portions.   4. The gas supply mask apparatus according to claim 3, wherein the baffle plate portion is configured to protrude in a substantially conical shape downward substantially. The opening area of the gas introduction port when the gases are introduced from the gas supply tube portion into the internal space of the gas introduction connector portion is in the range of 5.2 to 10.4 mm 2;
The opening area of the opening on the upper end side of the central opening constituted by the inner periphery of the support portion of the flow path changing adapter portion is in the range of 142 to 286 mm2. Gas supply mask device. A plurality of mounting leg portions provided on the gas introduction connector portion so that the flow passage change adapter portion supports the flow passage change adapter portion on the gas introduction connector portion. And baffle plate portions respectively connected to the plurality of mounting legs.
A plurality of ventilation openings are respectively disposed between the plurality of mounting legs,
3. The gas supply mask device according to claim 1, wherein a substantially ring-shaped gap is formed between the baffle plate portion and the gas introduction connector portion.   The gas supply mask apparatus according to claim 6, wherein the baffle plate portion has a substantially flat plate shape.   7. The gas supply mask device according to claim 6, wherein the baffle plate portion protrudes in a substantially conical shape substantially upward. The area of the baffle plate portion as viewed in plan is in the range of 160 to 268 mm2.
9. The gas according to claim 7, wherein an area of the gap existing between the baffle plate portion and the gas introduction connector portion in a plan view is in a range of 30 to 52 mm 2. Supply mask device. The baffle plate portion is configured in a substantially semi-cylindrical shape,
7. The gas supply unit according to claim 6, wherein an inner peripheral surface of the baffle plate portion is directed substantially upward, and an outer peripheral surface of the baffle plate portion is substantially directed downward. Mask device. The area of the baffle plate portion as viewed in plan is in the range of 60 to 104 mm2.
11. The gas supply device according to claim 10, wherein an area of the gap existing between the baffle plate portion and the gas introduction connector portion in a plan view is in a range of 128 to 216 mm 2. Mask device.

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