Reservoir for oxygen supply and oxygen supply system

Abstract

To provide an oxygen supplying reservoir and an oxygen supply system, capable of inhibiting a tube from being detached and inhibiting the oxygen supplying reservoir itself from being damaged even when internal pressure of the oxygen supplying reservoir increases.SOLUTION: A portable oxygen supplying reservoir 20 capable of storing oxygen supplied from the outside and supplying the stored oxygen to a patient comprises: a housing 21 having an oxygen storage unit 22; a film body 60 that is provided in the housing 21 and is configured to be movable in a reciprocating manner; and a pressure releasing unit that when pressure in the oxygen storage unit 22 is excessively increased, releases oxygen stored in the oxygen storage unit 22 to the outside of the housing 21.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to an oxygen supply reservoir and an oxygen supply system that constitute an oxygen supply system for supplying oxygen to a patient.

Background Art

[0002] Conventionally, an oxygen supply system including a reservoir for temporarily storing oxygen supplied from an oxygen supply device is known. In such an oxygen supply system, since the oxygen supplied from the oxygen supply device during exhalation can be temporarily stored in the reservoir, a higher concentration of oxygen can be administered to the patient. As such a reservoir, a pendant-type reservoir that is used by being hung around the patient's neck like a pendant is known (see, for example, Patent Document 1).

[0003] In the reservoir disclosed in this Patent Document 1, a diaphragm is housed inside the housing, and by the reciprocating movement of the diaphragm, it is possible to store oxygen in the housing or discharge the stored oxygen to the outside.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the reservoir disclosed in Patent Document 1, if the tube is blocked for some reason, oxygen will continue to be stored in the housing, so there is a concern that the internal pressure of the reservoir will increase, causing the tube connected to the reservoir to come off or the reservoir itself to be damaged.

[0006] The present invention has been made in view of such circumstances, and an object thereof is to provide an oxygen supply reservoir and an oxygen supply system that can suppress the tube from coming off or the reservoir itself from being damaged even when the internal pressure of the reservoir rises.

Means for Solving the Problems

[0007] The oxygen supply reservoir of the present invention is a portable oxygen supply reservoir that stores oxygen supplied from the outside and can supply the stored oxygen to a patient, and includes a housing and a membrane body provided in the housing and configured to be reciprocally movable. The housing is provided with an oxygen storage portion that is provided inside the housing and is a space defined by the housing and the membrane body, an inlet for taking in oxygen supplied from the outside of the housing into the oxygen storage portion, and an outlet for sending out the oxygen stored in the oxygen storage portion to the outside of the housing. When the pressure in the oxygen storage portion becomes excessively high, the oxygen supply reservoir further includes a pressure release portion that releases the oxygen stored in the oxygen storage portion to the outside of the housing through a flow path different from the inlet and the outlet.

[0008] In the present invention, oxygen supplied from the outside is stored in the oxygen storage portion, and when the pressure in the oxygen storage portion becomes excessively high, the oxygen in the oxygen storage portion is released to the outside through the pressure release portion, and the pressure inside the housing can be released. Therefore, even when the internal pressure of the oxygen supply reservoir rises, it is possible to suppress the tube connected to the oxygen supply reservoir from coming off or the oxygen supply reservoir itself from being damaged.

[0009] As a preferred aspect of the oxygen supply reservoir of the present invention, at least a part of the outer edge portion of the membrane body is configured to form a gap with the housing only when the pressure in the oxygen storage portion becomes excessively high, and the gap may function as the pressure release portion.

[0010] In the above aspect, the excessive pressure inside the housing can be released through the gap formed between the housing and the film body. Also, since there is no need for dedicated parts or the like to constitute the pressure release part, and the pressure release part is constituted by two parts, namely the housing and the film body, an increase in the number of parts and the manufacturing cost can be suppressed.

[0011] As a preferred aspect of the oxygen supply reservoir of the present invention, the housing is provided with a pressing part that presses a part of the region at the outer edge of the film body toward the housing, and the pressing part preferably protrudes from a position corresponding to the part of the region on the inner surface of the housing.

[0012] In the above aspect, the pressing part functions as a so-called valve. Specifically, when the pressure in the oxygen storage part is normal or lower than that, the pressing part presses the film body so that oxygen does not leak out from the gap formed between the housing and the film body. On the other hand, when the pressure in the oxygen storage part becomes excessively high, it functions to release oxygen from the gap formed between the housing and the film body to suppress an excessive increase in the internal pressure.

[0013] As a preferred aspect of the oxygen supply reservoir of the present invention, the housing is composed of two cases that can be fitted to each other, and when the two cases are fitted to each other, the film body is preferably configured to be sandwiched between the two cases.

[0014] In the above aspect, by sandwiching the film body between the two cases, the present invention can be relatively easily realized.

[0015] As a preferred aspect of the oxygen supply reservoir of the present invention, each of the two cases is provided with a claw part and a hole part that can be engaged with each other, and the two cases are preferably configured to be fitted by engaging the claw part with the hole part.

[0016] In the above aspect, the two cases can be firmly fixed by engaging the claw part with the hole part.

[0017] As a preferred embodiment of the oxygen supply reservoir of the present invention, each of the two cases is provided with a convex strip and a groove portion that can be fitted to each other, and the two cases may be configured to be fitted by fitting the convex strip into the groove portion.

[0018] In the above embodiment, the two cases can be firmly fixed by fitting the convex strip into the groove portion.

[0019] As a preferred embodiment of the oxygen supply reservoir of the present invention, the film body may preferably be made of a diaphragm. In the above embodiment, the present invention can be realized with a relatively simple configuration.

[0020] The oxygen supply system of the present invention includes an oxygen supply device that supplies oxygen to a patient, the oxygen supply reservoir of the present invention, a prong that can be attached to the patient, a first tube that connects the oxygen supply device and the oxygen supply reservoir, and a second tube that connects the oxygen supply reservoir and the prong.

[0021] In the present invention, oxygen supplied from the oxygen supply device is stored in the oxygen storage portion, and when the pressure in the oxygen storage portion increases, oxygen in the oxygen storage portion can be discharged to the outside from the pressure release portion to release the internal pressure. Therefore, even when the internal pressure of the oxygen supply reservoir rises, it is possible to prevent each tube from coming off or the reservoir itself from being damaged, and oxygen can be supplied to the patient more appropriately.

Effects of the Invention

[0022] According to the present invention, even when the internal pressure of the oxygen supply reservoir rises, it is possible to prevent the tube from coming off or the oxygen supply reservoir itself from being damaged.

Brief Description of the Drawings

[0023]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0024] Hereinafter, each embodiment of the oxygen supply system of the present invention and the oxygen supply reservoir used therein will be described with reference to the drawings.

[0025] [First Embodiment] The oxygen supply system 100 of the present embodiment is a system that supplies oxygen to the patient P. As shown in FIG. 1, this oxygen supply system 100 includes an oxygen supply device 10, a portable oxygen supply reservoir 20 capable of storing the oxygen supplied from the oxygen supply device 10, a first tube 11 connecting the oxygen supply device 10 and the oxygen supply reservoir 20, a prong 13 attached to the patient P, and a second tube 12 connecting the oxygen supply reservoir 20 and the prong 13.

[0026] When this oxygen supply device 10 is driven, oxygen is supplied to the oxygen supply reservoir 20 via the first tube 11. This oxygen supply reservoir 20 stores the supplied oxygen and supplies the stored oxygen to the patient P via the second tube 12 and the prong 13.

[0027] Although not shown in FIG. 1, the oxygen supply reservoir 20 is provided with an insertion portion 24 through which a string or the like is passed (see FIG. 3), and the oxygen supply reservoir 20 can be used by hanging it from the neck of the patient P like a pendant. As shown in FIG. 1, when the oxygen supply reservoir 20 is used by hanging it from the neck of the patient P, the insertion portion 24 is located above, and the first case 30 described later faces forward.

[0028] [Configuration of Oxygen Supply Reservoir] As shown in FIGS. 2 to 4, the oxygen supply reservoir 20 includes a housing 21 having a substantially circular shape in plan view, a membrane body 60 disposed in the housing 21 and configured to be reciprocally movable, and a cover 50 disposed in the housing 21. The insertion portion 24 described above is formed on the outer periphery of the housing 21.

[0029] As shown in FIGS. 2 and 3, the housing 21 is composed of two cases, a first case 30 and a second case 40, which are respectively formed to be fitted together. The housing 21 is provided with an oxygen storage portion 22 provided inside the housing 21, an inlet 25 disposed in the second case 40 to which the first tube 11 is connected, and an outlet 26 disposed in the second case 40 to which the second tube 12 is connected. Hereinafter, each component will be described in detail.

[0030] The first case 30 is formed of, for example, synthetic resin or the like. As shown in FIG. 3, the first case 30 has a dome portion 31 having a circular shape in plan view and a first side surface portion 32 hanging down (extending downward) from the outer peripheral edge of the dome portion 31. The dome portion 31 has a dome shape in which the central portion is the highest when viewed from the side and the height decreases toward the outer side in the radial direction, and a plurality of long holes 311 are formed substantially radially. Further, as shown in FIG. 2, a space S1 partitioned by a film body 60 is formed inside the first case 30.

[0031] On the inner side in the radial direction of the first side surface portion 32, a pressing portion 33 for pressing the outer edge portion 62 of the film body 60 toward the second case 40 is formed. Although the description of the pressing portion 33 by illustration is omitted, it protrudes in a ring shape from the inner surface of the first case 31. Further, as shown in FIGS. 3 and 4, four claw portions 34 that engage with the hole portion 461 of the second case 40 are formed on the first side surface portion 32 at equal intervals (at an arrangement interval of approximately 90 degrees with respect to the central position of the housing 21). The tip portion 341 of the claw portion 34 is bent outward in the radial direction as shown in FIGS. 2 and 5, and the bent portion is configured to engage with the stepped portion of the hole portion 461.

[0032] The second case 40 is formed of, for example, a synthetic resin or the like, similarly to the first case 30. As shown in FIG. 2, this second case 40 includes a bottom surface portion 41, a second inner side surface portion 42 extending upward from the outer peripheral edge of the bottom surface portion 41, an extension portion 43 formed continuously with the second inner side surface portion 42 and extending radially outward, a second outer side surface portion 45 formed continuously with the extension portion 43 and extending upward from the outer peripheral edge of the extension portion 43, and a flow path 47 formed in the bottom surface portion 41. A protruding portion 44 protruding toward the first case 30 is formed in the extension portion 43. This protruding portion 44 is located radially outside the pressing portion 33 of the first case 30 and sandwiches the film body 60 together with the pressing portion 33.

[0033] As shown in FIGS. 2 and 6, a housing groove portion 46 for housing the first side surface portion 32 of the first case 30 is formed between the protruding portion 44 and the second outer side surface portion 45. As shown in FIGS. 2 and 5, four hole portions 461 for engaging the claw portions 34 are formed in the housing groove portion 46. The four hole portions 461 are formed at equal intervals (at an arrangement interval of approximately 90 degrees with respect to the central position of the housing 21), similarly to the four claw portions 34. The hole portions 461 are formed by cutting a part of the radially outer wall surface of the wall surface constituting the housing groove portion 46, and the tip portion 341 of the claw portion 34 is caught in this cutout portion.

[0034] As shown in FIGS. 2 and 3, the flow path 47 is formed in the bottom surface portion 41, and the oxygen supplied from the oxygen supply device 10 flows through this flow path 47. This flow path 47 has a shape separated into two branches (substantially Y-shaped in plan view), and one inlet 25 and two outlets 26 are arranged at the ends of the flow path. In addition, storage walls 473 for storing the oxygen supplied from the inlet 25 are formed on both sides of the portion in front of the branching of the flow path 47 (the intermediate position between the inlet 25 and the outlets 26).

[0035] The cover 50 is formed of, for example, a synthetic resin or the like, and as shown in FIGS. 2 and 5, is disposed inside the second case 40 so as to cover the flow path 47. Two communication holes 51 are formed in the cover 50 at positions facing the storage wall 473. Therefore, the oxygen supplied into the flow path 47 through the first tube 71 and the intake port 25 flows into the oxygen storage portion 22 through the storage wall 473 and the communication holes 51.

[0036] As shown in FIG. 3, the membrane body 60 is made of a synthetic resin diaphragm having a circular shape in plan view. As shown in FIG. 5, the central portion 61 of the membrane body 60 protrudes (swells) toward the first case 30 side, and the outer edge portion 62 is sandwiched between the first case 30 and the second case 40. Specifically, the upper surface of the membrane body 60 is pressed by the pressing portion 33 from the inner side in the radial direction, and the lower surface of the membrane body 60 is pressed by the protruding portion 44 from the outer side in the radial direction, and the outer edge portion 62 of the membrane body 60 is fixed by the first case 30 and the second case 40 in a state where it is crushed. As shown in FIGS. 2 and 5, the thickness of the outer peripheral end (the end of the outer edge portion 62) of the membrane body 60 is formed thicker than the thickness of other portions of the membrane body 60. And the membrane body 60 is pressed by the pressing portion 33 so that the outer peripheral end of the membrane body 60 is located outside the pressing portion 33.

[0037] The first case 30, the membrane body 60, the cover 50, and the second case 40 are stacked in the order shown in FIG. 3, and by attaching the first case 30 to the second case 40, an oxygen supply reservoir 20 is formed.

[0038] [Configuration of Oxygen Storage Portion] The oxygen storage part 22 is a space partitioned by the second case 40 and the membrane body 60. As described above, when the oxygen taken in from the intake port 25 flows into the oxygen storage part 22, the membrane body 60 bulges toward the first case 30 side. Since this membrane body 60 is formed by a diaphragm, the pressure inside the oxygen storage part 22 does not increase so much until a predetermined amount of oxygen is stored in the oxygen storage part 22. However, when oxygen flows into the oxygen storage part 22 exceeding a predetermined amount (a specified amount), the membrane body 60 reaches a state of being extended to the limit, and the pressure inside the oxygen storage part 22 excessively increases. In the present embodiment, when the pressure inside the oxygen storage part 22 excessively increases, a pressure release part 70 is provided to release the oxygen stored in the oxygen storage part 22 to the outside of the housing 21.

[0039] [Configuration of the pressure release part] The pressure release part 70 is a gap between the second case 40 and the membrane body 60 formed when the membrane body 60 pushes up the first case 30 when the pressure inside the oxygen storage part 22 excessively increases. Specifically, when the pressure inside the oxygen storage part 22 increases and exceeds a predetermined pressure, the membrane body 60 lifts the first case 30. At this time, at the part where the tip 341 of the claw part 34 is engaged with the hole part 461, the first case 30 does not lift, but in other parts (parts where the claw part 34 and the hole part 461 are not engaged), the first case 30 deforms so as to lift with respect to the second case 40, and a gap is formed between the second case 40 and the membrane body 60 (see FIG. 7). Through this gap, oxygen escapes to the outside through the boundary part between the first side surface part 32 of the first case 30 and the second outer side surface part 45 of the second case 40 and the hole part 461. The gap formed between the second case 40 and the membrane body 60 is formed when the pressure inside the oxygen storage part 22 excessively increases, but is not formed when the pressure inside the oxygen storage part 22 is normal or lower than that. That is, when the pressure inside the oxygen storage part 22 is normal or lower than that, since the second case 40 and the membrane body 60 are in close contact, the oxygen storage part 22 is sealed except for the paths to the intake port 25 and the outlet port 26.

[0040] In this embodiment, when the oxygen supplied from the oxygen supply device 10 is stored in the oxygen storage unit 22 and the pressure in the oxygen storage unit 22 becomes excessively high, the oxygen in the oxygen storage unit 22 can be released to the outside through the pressure release portion 70 (the gap 70 formed between the second case 40 and the membrane body 60), and the pressure inside the oxygen storage unit 22 can be released. Therefore, even when the internal pressure of the oxygen supply reservoir 20 increases, it is possible to prevent the first tube 71 and the second tube 72 connected to the oxygen supply reservoir 20 from coming off or the oxygen supply reservoir 20 itself from being damaged.

[0041] In this embodiment, the outer edge portion 62 of the membrane body 60 is configured such that a gap 70 is formed between the housing 21 (the second case 40) only when the pressure in the oxygen storage unit 22 becomes excessively high. Therefore, since a dedicated component or the like for forming the pressure release portion is not required and the pressure release portion is formed by two components, the housing 21 and the membrane body 60, an increase in the number of components and the manufacturing cost can be suppressed.

[0042] In this embodiment, the pressing portion 33 described above is provided, and the pressing portion 33 functions as a so-called valve. Specifically, when the pressure in the oxygen storage unit 22 is normal or lower than that, the pressing portion 33 presses the membrane body 60 so that oxygen does not leak out from the gap 70 formed between the second case 40 and the membrane body 60. On the other hand, when the pressure in the oxygen storage unit 22 becomes excessively high, it functions to release oxygen from the gap 70 formed between the second case 40 and the membrane body 60 and suppress an excessive increase in the internal pressure.

[0043] In this embodiment, the housing 21 is composed of a first case 30 and a second case 40 that can be fitted to each other. When the first case 30 and the second case 40 are fitted to each other, the membrane body 60 is sandwiched between the first case 30 and the second case 40. Thereby, the oxygen supply reservoir 20 having the above-described excellent effects can be realized relatively easily.

[0044] In the present embodiment, the first case 30 and the second case 40 can be firmly fixed by engaging the claw portion 34 with the hole portion 461.

[0045] In the present embodiment, since the film body 60 is composed of a diaphragm, the oxygen supply reservoir 20 having the above-described excellent effects can be realized with a relatively simple configuration.

[0046] [Second Embodiment] Next, the oxygen supply reservoir according to the second embodiment of the present invention will be described with reference to the drawings. FIG. 8 is a perspective view showing the oxygen supply reservoir 20A of the present embodiment, FIG. 9 is a bottom view of the oxygen supply reservoir 20A shown in FIG. 8, FIG. 10 is a cross-sectional view of the oxygen supply reservoir 20A cut along the line C1-C1 shown in FIG. 9, and FIG. 11 is an enlarged cross-sectional view showing a main part of the oxygen supply reservoir shown in FIG. 10.

[0047] The oxygen supply reservoir 20A of the present embodiment is different from the oxygen supply reservoir 20 of the first embodiment in the configuration of the mounting portion and the pressure release portion of the first case 30A and the second case 40A. In the following description, the same or substantially the same components as those of the oxygen supply reservoir 20 of the first embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

[0048] The housing 21A of the oxygen supply reservoir 20A is composed of two cases, a first case 30A and a second case 40A, as shown in FIGS. 8, 10, and 11. On the first side surface portion 32A of the first case 30A, a ridge 321 protruding radially outward in the circumferential direction is formed. The lower side (the bottom side of the housing 21A) of the ridge 321 is an inclined surface (taper shape), and the upper side is a stepped shape.

[0049] On the second outer side surface portion 45A of the second case 40A, a groove portion 451 that engages with the ridge 321 is formed, as shown in FIGS. 10 and 11. The groove portion 451 is formed in a concave arc shape in cross section, and the longitudinal length in FIGS. 10 and 11 is set to be approximately twice the longitudinal length of the ridge 321.

[0050] Since these convex ridges 321 and groove portions 451 are continuously formed on the outer peripheral surfaces of the first side surface portion 32A and the second outer side surface portion 45A, the entire circumferences of the first case 30A and the second case 40A are in a state of being in close contact with each other.

[0051] Also, on the outer periphery of the second case 40A, at the boundary portion between the extending portion 43 and the second outer side surface portion 45, vent holes 462 communicating with the outside of the housing 21A are formed. As shown in FIG. 9, two of these vent holes 462 are formed at positions facing each other across the center of the second case 40A (at an arrangement interval of approximately 180 degrees with respect to the center position of the housing 21A). As shown in FIGS. 9 to 11, these vent holes 462 are formed by notching the connecting portion between the extending portion 43 and the second outer side surface portion 45A, and are substantially rectangular in plan view. The width of these vent holes 462 along the radial direction (hereinafter, expressed as the "depth (of the vent hole)") is set to, for example, 3 mm, and the width along the circumferential direction (hereinafter, simply expressed as the "width (of the vent hole)") is set to, for example, 3 mm.

[0052] In the present embodiment, as shown in FIG. 11, when the pressure in the oxygen storage portion 22 becomes excessively high, the film body 60 lifts the first case 30A, and a gap 70 functioning as a pressure release portion is formed between the second case 40A and the film body 60, and oxygen is configured to escape to the outside through the vent holes 462 from this gap 70.

[0053] In the present embodiment, by engaging the convex ridges 321 with the groove portions 451, the first case 30A and the second case 40A can be firmly fixed.

[0054] [Third Embodiment] Next, an oxygen supply reservoir according to the third embodiment of the present invention will be described with reference to the drawings. FIG. 12 is a perspective view showing an oxygen supply reservoir 20B according to the present embodiment. FIG. 13 is a cross-sectional view showing a main part of the oxygen supply reservoir 20B shown in FIG. 12 for explanation.

[0055] The oxygen supply reservoir 20B of this embodiment is different from the oxygen supply reservoir 20A of the second embodiment in the configuration of the first case 30B. In the following description, the same or substantially the same components as those of the oxygen supply reservoir 20A of the second embodiment are denoted by the same reference numerals, and the description thereof is omitted or simplified.

[0056] As shown in FIGS. 12 and 13, in the first case 30B of the oxygen supply reservoir 20B, two irregular holes 312 are arranged in a part of a plurality of long holes 311 formed in the dome portion 31B. Each irregular hole 312 is substantially L-shaped in plan view, and the two irregular holes 312 are arranged to be line-symmetrical.

[0057] The irregular hole 312 is arranged at a position opposite to the insertion portion 24 with respect to the center of the housing 21B. When the oxygen supply reservoir 20B is suspended from the patient's neck like a pendant, the insertion portion 24 is located above, while the irregular hole 312 is located below.

[0058] Among the edge portions constituting the irregular hole 312, the edge portion 313 near the outer periphery is inclined with respect to the side surface of the housing 21B. Specifically, the edge portion 313 is inclined so that the opening area of the irregular hole 312 expands from the inner surface to the outer surface of the dome portion 31B.

[0059] Also in this embodiment, similar to the case shown in FIG. 11 of the second embodiment, when the pressure in the oxygen storage portion 22 becomes excessively high, the film body 60 lifts the first case 30B, and a gap functioning as a pressure release portion is formed between the second case 40A and the film body 60, and oxygen is configured to escape to the outside through the vent hole 462 from this gap.

[0060] The irregular-shaped hole 312 is disposed at a position on the opposite side of the insertion portion 24 with respect to the center of the housing 21B. When the oxygen supply reservoir 20B is suspended from the patient's neck like a pendant, the insertion portion 24 is positioned upward, while the irregular-shaped hole 312 is positioned downward. Therefore, for example, when the oxygen supply reservoir 20B is used during a bath, even if water enters the space S1 partitioned by the first case 30B and the film body 60, the irregular-shaped hole 312 can serve as a drainage hole to discharge the water outside the first case 30B.

[0061] Further, since the edge portion 313 near the outer periphery among the edges constituting the irregular-shaped hole 312 is inclined with respect to the side surface of the housing 21B, when the oxygen supply reservoir 20B is suspended from the patient's neck like a pendant, the water that has entered the space S1 can be efficiently discharged to the outside.

[0062] It should be noted that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the following modifications are also possible. For example, in the first embodiment, four claw portions 34 and hole portions 461 are provided, but the present invention is not limited to this, and three or less may be provided. Further, it is also possible to provide five or more, but the number can be freely set as long as an appropriate gap is formed between adjacent claw portions 34 and hole portions 461.

[0063] In the second and third embodiments described above, the ventilation holes 462 are formed at two locations, but the present invention is not limited to this, and they may be formed at one location or three or more locations.

[0064] In the second and third embodiments described above, the case where the ventilation holes 462 are formed at the boundary portion between the extending portion 43 and the second outer side surface portion 45 has been exemplified and described, but the present invention is not limited to this. For example, a ventilation hole may be provided at a position inside the extending portion 43, closer to the inside than the boundary portion between the extending portion 43 and the second outer side surface portion 45 and outside the protruding portion 44 (directly below the first side surface portion 32A).

[0065] In the above-described embodiment, the case where the gap formed between the outer edge portion of the film body and the housing is formed over the entire circumference of the film body has been exemplified and described. However, the present invention is not limited thereto, and a configuration in which the gap is formed only in a partial region at the outer edge portion of the film body may be employed. For example, after removing the first case from the housing described in the above embodiment and arranging the film body so as to cover the upper end surface of the second case, the second case and the film body may be adhered to each other such that a gap is formed between the second case and a partial region of the outer edge portion of the film body when the pressure in the oxygen storage portion becomes excessively high.

[0066] In the above-described embodiment, the case where there is one inlet and two outlets (when the flow path 47 is substantially Y-shaped) has been exemplified and described. However, the present invention is not limited thereto, and other configurations may be employed, for example, both the inlet and the outlet are one (the flow path is I-shaped).

[0067] The material, shape, dimensions, number, arrangement location, etc. of each component in the above-described embodiment are arbitrary as long as the present invention can be achieved, and are not limited. For example, in the above-described embodiment, the case where the housing (the first case and the second case) etc. are made of synthetic resin has been exemplified and described. However, other materials such as metal may be used. Further, in the above-described embodiment, the case where the housing is substantially circular in plan view has been exemplified and described. However, other shapes such as a quadrangle (rhombus) in plan view may be employed.

Example

[0068] The effects of the present invention will be described based on the following examples and comparative examples. The oxygen supply reservoirs of Examples 1 to 4 are the same as the oxygen supply reservoir 20A described in the second embodiment. When the pressure in the oxygen storage section becomes excessively high, the membrane body lifts the first case, and a gap that functions as a pressure release section is formed between the second case and the membrane body. The number and size (opening area) of the ventilation holes provided in the second case are different. Specifically, the oxygen supply reservoir of Example 1 is provided with two ventilation holes (width 3 mm × depth 3 mm) in the second case, similar to the oxygen supply reservoir 20A described in the second embodiment. The oxygen supply reservoir of Example 2 has the same size of ventilation holes as Example 1, but the number of ventilation holes is reduced to one. The oxygen supply reservoir of Example 3 has the same number of ventilation holes as Example 1, but the width of each ventilation hole is set to 1.5 mm. The oxygen supply reservoir of Example 4 has the same number of ventilation holes as Example 1, but the depth of each ventilation hole is set to 5 mm. As a comparative example, based on the oxygen supply reservoir 20A described in the second embodiment, two ventilation holes provided in the second case were removed, and it was configured such that no gap was formed between the second case and the membrane body even when the pressure in the oxygen storage section became excessively high.

[0069] For each of the oxygen supply reservoirs of Examples 1 to 4 and the comparative example, a flow meter (manufactured by Cofflock Co., Ltd.) was connected to the inlet through a tube, and a prong (manufactured by Atom Medical Co., Ltd.) was connected to the outlet through a tube. As the tube, a tube with an inner diameter of 4 mm manufactured by Atom Medical Co., Ltd. was used. Oxygen (0.4 MPa 7 L / min) was passed through these oxygen supply reservoirs of Examples 1 to 4 and the comparative example, the tube on the prong side was blocked, and a pressure gauge was connected to the circuit to measure the pressure rise of each oxygen supply reservoir. The measurement results of Examples 1 to 4 and the comparative example are shown in Table 1.

[0070]

Table 1

[0071] In Examples 1 to 4, when the internal pressure increased, the oxygen in the oxygen storage part could escape to the outside of the housing, so the pressure increase was 65 kPa or less, and it was confirmed that sufficient performance was achieved. On the other hand, in the comparative example, when the pressure resistance reached 250 to 350 kPa, the first case came off and the film body ruptured.

[0072] That is, as in Examples 1 to 4, when the pressure in the oxygen storage part excessively increased, if it was an oxygen supply reservoir in which the film body lifted the first case and a gap functioning as a pressure release part was formed between the second case and the film body, it was confirmed that even when the internal pressure of the oxygen supply reservoir increased, it was possible to suppress the tube from coming off or the oxygen supply reservoir itself from being damaged.

Explanation of Reference Numerals

[0073] 10... Oxygen supply device 11... First tube 12... Second tube 13... Prong 20, 20A, 20B... Oxygen supply reservoir 21, 21A, 21B... Housing 22... Oxygen storage part 24... Insertion part 30, 30A, 30B... First case 31, 31B... Dome part 311... Long hole 312... Irregular hole 313... Edge part of the irregular hole 32, 32A... First side surface part 33... Pressing part 34... Claw part 341... Tip part 40, 40A... Second case 41... Bottom surface part 42... Second inner side surface part 43... Extension part 44... Protrusion part 45, 45A... Second outer side surface part 451... Groove part 46... Accommodation groove part 461... Hole part 462... Vent hole 47…Flow path 50…Cover 51…Communication hole 60…Membrane body 61…Central part 62…Outer edge part 70…Pressure release part (gap) 100…Oxygen supply system P …Patient S1…Space (space partitioned by the first case and the membrane body)

Claims

1. A portable oxygen supply reservoir that stores oxygen supplied from the outside and can supply the stored oxygen to a patient, comprising: A housing composed of two cases, a first case and a second case that can be fitted to each other; A membrane provided in the housing and configured to be reciprocally movable; The membrane is configured to be sandwiched between the first case and the second case when the first case and the second case are fitted to each other; In the housing, An oxygen storage portion provided inside the housing and defined by the second case and the membrane; An inlet for taking in oxygen supplied from outside the housing into the oxygen storage portion; An outlet for sending out the oxygen stored in the oxygen storage portion to the outside of the housing; An insertion portion through which a string is passed; are provided, The first case is provided with a drainage hole at a position opposite to the insertion portion with respect to the center of the housing. An oxygen supply reservoir characterized by the above.

2. The oxygen supply reservoir according to claim 1, characterized in that an edge portion of the edge constituting the drainage hole, which is close to the outer periphery of the housing, is inclined with respect to the side surface of the housing.

3. The oxygen supply reservoir according to claim 1 or 2, characterized in that the drainage hole is substantially L-shaped in plan view, and one side of the L is arranged along the side surface of the housing.

4. The oxygen supply reservoir according to claim 3, characterized in that the number of the drainage holes is two and they are arranged to be line-symmetric with each other.

5. An oxygen supply device for supplying oxygen to a patient; The oxygen supply reservoir according to any one of claims 1 to 4; A prong that can be attached to the patient; A first tube connecting the oxygen supply device and the oxygen supply reservoir; An oxygen supply system characterized by comprising a second tube connecting the oxygen supply reservoir and the prong.

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