JP7044651B2 - Balloon for sphygmomanometer - Google Patents

Description

The present invention relates to a sphygmomanometer balloon used in a manual sphygmomanometer.

The manual sphygmomanometer pressurizes the air bag by manually expanding and contracting the balloon, and the air bag blocks blood to measure the blood pressure. The balloon used in this type of sphygmomanometer is a hollow rubber ball with both ends open, and the opening on the side (tip) connected to the sphygmomanometer body is the air inlet and the other side (end). The opening functions as an air intake. The intake port at the end contains a small ball that functions as a check valve in the intake passage. When the air supply ball is crushed, the small ball moves to the tip side and the intake passage opens to take in air. When the air supply ball returns, the small ball moves to the terminal side, the intake passage is blocked, and the intake air is cut off (see, for example, Patent Document 1). By repeatedly expanding and contracting this balloon, compressed air is sent to the air bag.

Japanese Unexamined Patent Publication No. 2015-10045

However, in recent years, there has been a tendency to place importance on cleaning the sphygmomanometer, and the end of the balloon has been wiped off with a drug. As a result, a small ball arranged at the end portion sticks to the intake passage, causing a problem that intake failure occurs.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a balloon for a sphygmomanometer having a structure having an intake air intake and a check valve function that does not cause an intake air failure due to washing. ..

In order to solve the above problems, the sphygmomanometer inhaler according to an embodiment of the present invention is a stretchable hollow inhaler used in a manual sphygmomanometer, with the tip connected to the main body of the sphygmomanometer. An air supply port, an intake port, an intake blocking material for stopping intake from the intake port, and a backflow prevention material for preventing the return of air supply from the air supply port are arranged at the tip portion. The port and the air intake port are characterized in that they are arranged concentrically.

Another aspect of the inspiratory sphere for a sphygmomanometer of the present invention includes a stretchable hollow sphere whose tip is the side connected to the main body of the sphygmomanometer, and an inspiratory port arranged at the tip of the sphere. An intake port arranged at the tip of the ball and concentrically arranged with the air supply port, an intake blocking material for stopping intake from the intake port, and preventing the return of air supply from the air supply port. It is characterized by being provided with a backflow prevention material.

In the above embodiment, it is also preferable that the air supply port is arranged on the inner circumference and the intake port is arranged on the outer periphery.

In the above aspect, it is also preferable that the intake blocking material is arranged in an annular shape along the intake port.

In the above aspect, it is also preferable that the intake air blocking material is a hard and flush disk or a packing having a soft inside.

In the above aspect, it is also preferable that the backflow prevention material is a hollow tubular body provided with a slit.

According to the balloon for a sphygmomanometer of the present invention, it is possible to prevent poor inspiration due to washing.

It is an overall view of the manual type sphygmomanometer using the balloon which concerns on embodiment of this invention. It is a perspective view of the balloon which concerns on 1st Embodiment. It is a top view of the balloon which concerns on the same form. It is an exploded perspective view of the main part of the balloon which concerns on the same form. It is a vertical cross-sectional view (cross-sectional view along the line VV of FIG. 3) of the main part of the balloon which concerns on the same form. It is a perspective view of the balloon which concerns on 2nd Embodiment. It is a top view of the balloon which concerns on the same form. It is an exploded perspective view of the main part of the balloon which concerns on the same form. It is a vertical cross-sectional view (cross-sectional view along the line VV of FIG. 7) of the main part of the balloon which concerns on the same form.

(Overall configuration of blood pressure monitor)

As shown in FIG. 1, the manual sphygmomanometer mainly includes an air hose 13 that connects a cuff 11, a control unit 12, a balloon 20, a cuff 11 and a control unit 12, and a control unit 12 and a balloon 20. And an exhaust valve 14 interposed between the balloon 20 and the air hose 13. The control unit 12 and the cuff 11 are used as the sphygmomanometer main body 10.

At the time of measurement, the cuff 11 is wrapped around the measured portion and attached, and the balloon 20 is manually expanded and contracted according to the instruction of the control unit 12. As a result, compressed air is sent to an air bag (not shown) in the cuff 11, the air bag expands, and the device under test is ischemic. On the other hand, by loosening the exhaust valve 14, exhaust gas is gradually exhausted from the exhaust valve 14, and the ischemic state is released. A pressure sensor (not shown) is installed in the cuff 11, and the pressure sensor detects a cuff pressure signal and a pulse wave signal of a living body. The control unit 12 converts the blood pressure value and the pulse rate from the above signal and displays them.

(Composition of balloon)
(First embodiment: disk type)
2 to 5 relate to the balloon 20 according to the first embodiment.

The balloon 20 is a pressurizing means for supplying air to the air bag in the cuff 11. As shown in FIG. 2, the balloon 20 is a hollow ellipsoidal sphere that can be expanded and contracted by a pressing operation by hand, and is made of an elastic material such as rubber. The side connected to the sphygmomanometer body 10 is the tip portion 21 of the balloon 20, and the other side is the end portion 22. The balloon 20 has an opening 23 at the tip 21 (FIG. 4). The end 22 has no openings and is not provided with any parts (FIG. 2). Hereinafter, the area around the tip portion 21 will be the main part of the balloon 20.

The main part of the balloon 20 will be described with reference to FIGS. 3 to 5. As shown in FIG. 4, the tip portion 21 of the balloon 20 is provided with an upper case 30, a lower case 40, a disk 50, and a slit valve 60. The direction of the tip and end of the balloon 20 also applies to these members.

As shown in FIG. 4, the upper case 30 has a first cylindrical portion 31 and a second cylindrical portion 32. The upper case 30 is formed of, for example, a resin such as an acrylonitrile-butadiene-styrene copolymer (ABS), polypropylene (PP), polyacetal (PP), nylon, or polycarbonate (PC). The first cylindrical portion 31 and the second cylindrical portion 32 are preferably formed by integral molding.

The first cylindrical portion 31 is a hollow cylinder, and has a pillar portion 33 to be inserted into a lower case 40, which will be described later, and a tubular portion 34 on the tip end side of the pillar portion 33 (FIG. 4). The tubular portion 34 is inserted into the air hose 13. The opening of the tubular portion 34 functions as an air supply port 24 (FIG. 5). The inside of the pillar portion 33 functions as an air supply passage 35 (FIG. 5).

The second cylindrical portion 32 is a hollow cylinder shorter than the first cylindrical portion 31, and has an opening on the terminal side. The second cylindrical portion 32 is arranged in an annular shape on the outer circumference of the base of the tubular portion 34 of the first cylindrical portion 31.

The tip portion 36 of the second cylindrical portion 32 is provided with a plurality of holes 39 in the circumferential direction (FIG. 4). The hole 39 functions as an intake port 25 (FIG. 5). In this embodiment, the intake ports 25 are arranged in an annular shape at four locations separated by 90 degrees in the circumferential direction. However, the number and spacing of the intake ports 25 are not limited to this form. It should be noted that each hole 39 is preferably formed over a region of 45 degrees or more in the circumferential direction, and more preferably over a region of 60 degrees or more so that the intake effect can be sufficiently obtained.

The end portion 37 (FIG. 5) of the second cylindrical portion 32 engages with the lower case 40, which will be described later, in an uneven manner. At the end portion 37 of the second cylindrical portion, a first step portion 38 that is positioned at the time of concave-convex engagement is formed (FIG. 5).

As shown in FIG. 4, the lower case 40 has an insertion portion 41 inserted into the opening 23 of the balloon 20 and a lid portion 42 at the tip of the insertion portion 41. The lower case 40 is made of the same resin as the upper case 30. The insertion portion 41 is a hollow cylinder having a radius slightly larger than that of the pillar portion 33 of the first cylinder portion 31. At the end of the insertion portion 41, a retaining portion 43 for the air balloon 20 formed thick in the radial direction is formed (FIG. 5). The lid portion 42 extends radially from the insertion portion 41 in a flange shape, and the end surface thereof airtightly contacts the tip portion 21 of the balloon 20. On the surface on the distal end side of the lid portion 42, a second step portion 44 that engages with the first step portion 38 formed at the end portion 37 of the first cylindrical portion is formed (FIG. 5).

As shown in FIG. 5, when the upper case 30 and the lower case 40 are assembled, they are positioned in the radial direction by the first step portion 38 and the second step portion 44, and the outer peripheral portion of the pillar portion 33 of the upper case 30 and the lower case are positioned. A gap is formed in the circumferential direction with the inner peripheral portion of the insertion portion 41 of the 40, and the intake passage 45 is formed in an annular shape.

As shown in FIG. 4, the disk 50 has a ring shape, is arranged between the upper case 30 and the lower case 40, is inserted through the outer peripheral portion of the pillar portion 33 of the upper case 30, and is assembled along the intake port 25. Can be arranged in a ring. The disk 50 moves in the space between the upper case 30 and the lower case 40 and functions as an intake air blocking material (FIG. 5). The front end surface 51 of the disk 50 abuts on the end end surface of the tip 36 of the second cylinder. The end-side surface 52 of the disk 50 abuts on the front end-side surface of the lid 42 of the lower case 40. The disc 50 is preferably made of a metal or a hard resin (ABS, PP, PP, nylon, PC) that does not easily cause member distortion in order to improve the airtightness at the time of contact, and further, the tip of the disc 50. The side surface 51 and the end side surface 52 are preferably formed flush with each other.

The slit valve 60 is a hollow cylinder, is arranged between the upper case 30 and the lower case 40, and is assembled by being inserted into the pillar portion 33 of the upper case 30, that is, through the air supply passage 35 (FIG. 5). The slit valve 60 is preferably made of a soft resin such as natural rubber or synthetic rubber (nitrile rubber, fluororubber, urethane rubber, silicone rubber). The slit valve 60 is provided with slits 61 at one or several locations in the circumferential direction over the longitudinal direction, which is the air flow direction (FIG. 4). The slit valve 60 functions as a backflow prevention material for preventing the return of air from the air supply port 24. At the end of the slit valve 60, a slit retaining portion 62 (FIG. 4) with respect to the pillar portion 33, which is formed thick in the radial direction, is formed.

When the upper case 30, the lower case 40, the disk 50, and the slit valve 60 are assembled to the balloon 20, the air supply passage 35 is arranged on the inside and the intake passage 45 is arranged on the outside as shown in FIGS. 3 and 5. A double tube structure is obtained in which the air supply port 24 and the intake port 25 are arranged concentrically with the tip portion 21 of the balloon 20.

The operation of the balloon 20 having the above configuration will be described.

(Air supply operation)
When the balloon 20 is crushed, the internal pressure of the balloon 20 rises, the disk 50 in the intake passage 45 moves toward the upper case 30 (the position of the solid line in FIG. 5), and the intake port 25 is shut off. On the other hand, the slit 61 of the slit valve 60 in the air supply passage 35 is opened, and the air in the balloon 20 passes through the air supply passage 35 and is supplied from the air supply port 24.

(Intake operation)
When the balloon 20 returns, the internal pressure of the balloon 20 drops, the slit 61 in the air supply passage 35 closes due to the negative pressure, and the air supply passage 35 is blocked. On the other hand, due to the negative pressure, the disk 50 moves in the direction of the lower case 40 (the position of the broken line in FIG. 5), the intake port 25 is released, and intake air is taken from the intake port 25.

(Second embodiment: packing type)
6 to 9 relate to the balloon 20 according to the second embodiment. The same reference numerals are used for the elements common to the first embodiment, and the description thereof will be omitted.

As shown in FIG. 6, the terminal portion 22 of the balloon 20 according to the second embodiment also has no opening and is not provided with any parts. A main part of the balloon 20 according to the second embodiment will be described with reference to FIGS. 7 to 9. As shown in FIG. 8, the tip portion 21 of the balloon 20 is provided with an upper case 300, a lower case 40, a slit valve 60, and a packing 70. The direction of the tip and end of the balloon 20 also applies to these members.

As shown in FIG. 8, the upper case 300 has a first cylindrical portion 301 and a second cylindrical portion 302. The upper case 300 is made of the same resin as the upper case 30. The first cylindrical portion 301 and the second cylindrical portion 302 are preferably formed by integral molding.

The first cylindrical portion 301 is a hollow cylinder, and has a pillar portion 303 inserted into the lower case 40 and a tubular portion 304 on the tip end side of the pillar portion 303 (FIG. 8). The tubular portion 304 is inserted into the air hose 13. The opening of the tubular portion 304 functions as an air supply port 24 (FIG. 9). The inside of the pillar portion 303 functions as an air supply passage 35 (FIG. 9). A protruding portion 305 extending in the radial direction is formed in an annular shape between the tubular portion 304 and the pillar portion 303 (FIG. 8).

The second cylindrical portion 302 is a disk shorter than the first cylindrical portion 301 and has an opening on the terminal side. The second cylindrical portion 302 is arranged in an annular shape on the outer periphery of the base of the protruding portion 305 of the first cylindrical portion 301.

The tip portion 306 of the second cylindrical portion 302 is provided with a plurality of holes 309 in the circumferential direction (FIG. 8). The hole 309 functions as an intake port 25 (FIG. 9). In this embodiment, the intake ports 25 are arranged in a ring shape at four locations separated by 90 degrees in the circumferential direction, and two intake ports 25 are provided at each location. However, the number and spacing of the intake ports 25 are not limited to this form. The end portion 307 (FIG. 9) of the second cylindrical portion engages with the annular projection 408 of the lower case 40, which will be described later, in an uneven manner.

The lower case 40 is the same as the first embodiment, and has an insertion portion 41 and a lid portion 42. A retaining portion 43 is formed in the insertion portion 41, and the end surface of the lid portion 42 is in airtight contact with the tip portion 21 of the balloon 20. An annular protrusion 408 is formed on the surface of the lid 42 on the distal end side in the radial center of the surface (FIG. 8).

As shown in FIG. 9, when the upper case 30 and the lower case 40 are assembled, the end portion 307 of the second cylindrical portion and the annular protrusion 408 are unevenly engaged and positioned in the circumferential direction, and the pillar portion of the upper case 30 is formed. A gap is formed in the circumferential direction between the outer peripheral portion of 303 and the inner peripheral portion of the insertion portion 41 of the lower case 40, and the intake passage 45 is formed in an annular shape.

As shown in FIG. 8, the packing 70 has a ring shape and has a film portion 73 inside the outer peripheral portion 71 and the outer peripheral portion 71. The film portion 73 is notched at four locations at intervals of 90 degrees in the circumferential direction. The packing 70 is arranged between the upper case 300 and the lower case 40, and is inserted into the outer peripheral portion of the pillar portion 303 of the upper case 300 and assembled. As shown in FIG. 9, the packing 70 is arranged so that the membrane portion 73 is aligned with the intake port 25, and the outer peripheral portion 71 is an annular protrusion with the end surface of the tip portion 306 of the second cylindrical portion. It is sandwiched and fixed to the surface of 408. The packing 70 functions as an intake air blocking material. The inner 72 of the packing 70, that is, the film portion 73 is preferably formed of a soft resin, for example, natural rubber or synthetic rubber (nitrile rubber, fluororubber, urethane rubber, silicone rubber) in order to increase flexibility. ..

The slit valve 60 is the same as in the first embodiment, and has a slit 61 and a slit retaining portion 62 (FIG. 9). The slit valve 60 is inserted into the air supply passage 35 and assembled (FIG. 9), and functions as a backflow prevention material.

When the above-mentioned upper case 300, lower case 40, packing 70, and slit valve 60 are assembled to the tip portion 21 of the balloon 20, the air supply passage 35 is inside and the intake passage 45 is as shown in FIGS. 7 and 9. A double tube structure is obtained in which the air supply port 24 and the intake port 25 are arranged concentrically with the tip portion 21 of the balloon 20 arranged on the outside.

The operation of the balloon 20 having the above configuration will be described.

(Air supply operation)
When the balloon 20 is crushed, the internal pressure of the balloon 20 rises, the membrane portion 73 of the packing 70 on the intake passage 45 is blocked, and the intake port 25 is blocked. On the other hand, the slit 61 of the slit valve 60 in the air supply passage 35 is opened, and the air in the balloon 20 passes through the air supply passage 35 and is supplied from the air supply port 24.

(Intake operation)
When the balloon 20 returns, the internal pressure of the balloon 20 drops, the slit 61 in the air supply passage 35 closes due to the negative pressure, and the air supply passage 35 is blocked. On the other hand, the film portion 73 of the packing 70 is pulled in by the negative pressure, the intake port 25 is released, and intake air is taken from the generated gap.

(Action and effect of balloon)
As described above, according to the air balloon 20 of the first and second embodiments, the structure having the functions of the intake air and the check valve is arranged not at the end 22 of the balloon 20 but at the tip 21 for cleaning. It is possible to prevent the occurrence of intake failure due to.

Further, by arranging the air supply port 24 and the intake port 25 concentrically at the tip portion 21 of the balloon 20, the number of parts attached to the balloon 20 can be reduced, and a compact structure can be obtained. can.

Further, by combining the air supply port 24 and the intake port 25 at the tip portion 21 and arranging no member at the end portion 22, the degree of freedom in the shape of the balloon 20 can be expanded.

Although the preferred embodiments of the present invention have been described above, the present embodiments can be modified based on the knowledge of those skilled in the art, and such embodiments are also included in the scope of the present invention.

10 ... Sphygmomanometer body 20 ... Balloon 21 ... Tip 22 ... End 23 ... Opening 24 ... Air inlet 25 ... Intake port 35 ... Air passage 45 ... Intake passage 50 ... Disc (intake cutoff material)
51 ... Surface on the tip side of the disk 52 ... Surface on the end side of the disk 60 ... Slit valve (backflow prevention material)
61 ... Slit 70 ... Packing (intake blocking material)
71 ... Outer part of packing 72 ... Inside of packing

Claims (3)

A stretchable hollow ball with the tip connected to the body of the sphygmomanometer,
The air supply port arranged at the tip of the ball and
An intake port arranged at the tip of the sphere and concentrically arranged with the air supply port,
An intake blocking material that stops intake from the intake port,
A backflow prevention material that prevents the return of air supply from the air supply port is provided.
The air supply port is arranged on the inner circumference and the intake port is arranged on the outer circumference.
The air intake blocking material is a balloon for a sphygmomanometer, characterized in that it is arranged in a ring shape along the intake port . The balloon for a sphygmomanometer according to claim 1, wherein the intake blocking material is a hard and flush disk or a packing having a soft inside . The balloon for a sphygmomanometer according to claim 1 or 2, wherein the backflow prevention material is a hollow tubular body provided with a slit .

Images