JPH0761319B2 - Air balloon for blood pressure monitor - Google Patents

Description

Description: [Industrial field of use] The present invention relates to an air balloon for a sphygmomanometer used in an electronic sphygmomanometer and the like.

[Prior Art] A conventional air balloon for a sphygmomanometer used in an electronic sphygmomanometer or the like is configured as follows. That is, a balloon-shaped elastic body having two openings, and the outer peripheral surface of which is manually pressurized to supply air to the cuff, and a sphere in the channel. An intake check valve is provided in one of the opening portions, which is movably built-in to introduce outside air into the main body by the movement of the sphere, and an exhaust state in which the air inside the main body is discharged. I was trying to inflate the cuff.

On the other hand, the applicant of the present application has provided an air supply check valve having a constant-speed exhaust function at the other opening of the main body as a device configuration for measuring blood pressure when decompressing the cuff, and the air supply check valve and the above intake air are provided. Although it is proposed to perform constant-speed exhaust through both check valves, the intake check valve originally opens when the pressure inside the air balloon becomes negative, while the pressure in the air balloon is The basic operating principle is to close the valve when positive pressure is reached.

Further, JP-A-53-96288 discloses a sphygmomanometer balloon, which has a function of discharging air at a constant speed when decompressing a cuff with respect to a rubber ball, and a ball valve mechanism. Disclosed is an insufflation balloon for a blood pressure monitor, which is provided with an intake check valve.

[Problems to be Solved by the Invention] However, as a result of the conventional air balloon for a sphygmomanometer configured as described above, the cuff decompression performed through both the air check valve and the intake check valve. At times, when the air supply bulb was turned downward, the sphere closed the intake check valve, and the constant-speed exhaust function of the air supply check valve did not work properly.

Further, according to the sphygmomanometer air balloon disclosed above, the constant exhaust function of the air supply check valve that exhausts at a constant speed when decompressing the cuff should always be constant at the maximum and minimum pressures of the cuff. There was a problem that I could not do.

Therefore, the sphygmomanometer air balloon of the present invention has been made in view of the above-mentioned problems, and its purpose is to perform both the air supply operation to the cuff, the air supply check valve, and the intake check valve. It is an object of the present invention to provide a sphygmomanometer air balloon capable of always setting the exhaust speed of blood pressure measurement at the time of decompressing a cuff via the valve regardless of the magnitude of the cuff pressure.

[Means for Solving Problems] and [Operation] In order to achieve the above-mentioned objects and achieve the object, the air balloon for a blood pressure monitor of the present invention has the following configuration. That is, an air balloon main body made of a balloon-like elastic body and having two openings to manually inject air to the cuff, an introduction state for introducing outside air into the air balloon main body, and an air balloon main body. The exhaust condition to exhaust the air inside the sphere is movably built in the flow path, and an intake check valve for moving the sphere is installed in one of the openings, and constant-speed exhaust is used to decompress the cuff. A sphygmomanometer air balloon comprising a functional air check valve at the other side of the opening of the balloon, wherein the intake check valve forms an orifice at a position where the sphere is moved and abutted in the discharged state. Therefore, a ring-shaped body having a plurality of protrusions made of an elastic body is arranged, and when the contact pressure on the protrusion of the spherical body is large, the ring-shaped body is largely deformed to reduce the opening area of the orifice. Also, the contact pressure on the projection of the sphere is small. Occasionally, by expanding the opening area of the orifice without substantially deforming it, air is sent to the cuff, and constant-speed exhaust when decompressing the cuff through the orifice is performed without being affected by the magnitude of the cuff pressure. Work like.

[Examples] Hereinafter, examples of the air balloon for a blood pressure monitor of the present invention will be specifically described with reference to the drawings.

FIG. 1 is a central cross-sectional view through the central plane of the sphygmomanometer air balloon of the first embodiment. In the figure, an air supply check valve 2 and an intake check valve 5 are an air supply bulb main body 1 made of a balloon-shaped elastic body.
The two openings 1a and 1b are respectively press-fitted and provided as shown. The air check valve 2 is made of silicon rubber having a rubber hardness of about 40 degrees, and is integrally formed with a mounting base portion and a wedge-shaped flat portion 2c on both sides.

In addition, one end of the air flow passage 2a shown by the broken line of the air supply check valve 2 is opened toward the inside of the air supply bulb main body 1 as shown in the drawing,
The other end is formed as a linear opening 2b, and a plate 2d having a thickness of about 0.05 mm is inserted into the opening 2b, and an orifice is formed at both ends of this plate.

As a result, when the pressure inside the air balloon main body 1 is positive, the above-mentioned opening 2b is greatly opened, while when the inside of the air balloon main body 1 is at a large negative pressure, the orifice of the opening 2b is closed and the cuff pressure is increased. It has a function to prevent the air from flowing backward, and because the opening area of the orifice of the opening 2b is variable according to the cuff pressure, the cuff can be exhausted at a constant level and the cuff pressure can be reduced. It enables blood pressure measurement at any time.

Next, the intake check valve 5 forms a flow path 5a in the longitudinal direction, and forms a cutout portion H at a portion facing the inside of the air blower body 1 to provide a passage plug body portion 5b for introducing outside air into the inside. On the other hand, a plug body 3 is provided on the air open side by being press-fitted, adhered, etc., so that the spherical body 4 can move in the flow path 5a in the longitudinal direction in both directions of the arrow.

A channel 3b of an opening is formed in the center of the plug body 3, and an orifice is formed at the corner between the wall surface of the opening channel 3b abutting the sphere 4 and the opening channel 3b. A plurality of cutouts 3a are formed for this purpose.

Next, FIG. 2 is a partially cutaway external perspective view of the intake check valve 5 of FIG. In this figure, the intake check valve 5 forms a flow path 5a in the longitudinal direction, and a plurality (four in the figure) of the outer peripheral surface portion 5c attached to the air blower main body 1 as shown in the figure. Passage plug body portion 5b forming the notch H
Is formed, and when the sphere 4 is moved to the passage plug portion 5b side, air can be supplied through the notch H.

On the other hand, on the air release side of the intake check valve 5, the sphere 4 is placed in the flow path 5a, and then the plug 3 is press-fitted and adhered. Even if the plug 3 and the intake check valve 5 are integrally molded in a shape that does not crimp the passage plug 5b, and the passage plug 5b is crimped after the sphere 4 is introduced from the opening on the side of the passage plug 5b. good. In order to form an opening channel 3b at the center of the plug body 3 and to form an orifice at the corner between the wall surface of the opening channel 3b that abuts the sphere 4 and the opening channel 3b. 4 cutouts 3a are formed.

The total area of the orifices of the notches 3a is set sufficiently smaller than the total area of the orifices of the notches H formed by the passage plugs 5b described above. The function is to prevent backflow of intake air.

The operation of the sphygmomanometer air balloon described above will be described below with reference to the drawings.

FIGS. 3 (a), (b), and (c) are central cross-sectional views showing an explanation of the operation of the sphygmomanometer insufflator.

First, in FIG. 3 (a), when air is supplied to the cuff, if the outer portion of the air balloon main body 1 is manually pressurized in the direction of the double arrow, the inside of the air balloon main body 1 is temporarily positive pressure. Therefore, the spherical body 4 in the intake check valve 5 is moved to the plug body 3 side, and the opening 2b of the air supply check valve 2 is opened.

As a result, air is fed in the direction of arrow A in the figure, but is fed in the direction of arrow B in the figure through the orifice formed by the notch 3a formed in the plug 3 of the intake check valve 5. It will be. Since the air supply in the arrow B direction is set to be sufficiently smaller than the air supply in the arrow A direction,
The original function of the intake check valve 5 can be achieved. Next, in FIG. 3 (b), when the manual pressurization of the outer shape portion of the air-balloon body 1 is released, the air-balloon body 1 is moved by the elastic return force of the air-balloon body 1 itself before the double-arrow pressurization. While returning to the state, air is fed in the directions of arrows C and D in the figure, but this time, the amount of air fed through the notch H of the intake check valve 5 becomes larger. As a result, the balloon body 1 returns to its original shape. Thereafter, similarly to (a) and (b), the state shown in the figure is repeated to perform cuff pressurization.

Next, FIG. 3 (c) is a diagram showing the state of blood pressure measurement during decompression of the cuff, through the air supply from the cuff in the direction of arrow E in the figure and the notch 3a of the intake check valve 5. The air supply in the arrow F direction is performed. As a result, exhausting at a constant speed required for blood pressure measurement during depressurization of the cuff is also possible in the automatic blood pressure monitor using the air balloon body 1.

Next, FIG. 4 is an external perspective view of a ring-shaped body used for constructing a second embodiment of the intake check valve. In this figure, the ring-shaped body 7 has a plurality of protrusions 7a integrally formed from an annular base made of an elastic body such as silicon rubber having a particularly low hardness.

FIGS. 5 (a) and 5 (b) are cross-sectional views of the main part of the intake check valve using the ring-shaped body 7, which also serves as an operation view. In this figure, the ring-shaped body 7 is arranged as shown in the drawing on the wall forming the flow path 5 formed on the atmosphere opening side of the intake check valve body, and the ring-shaped body 7 As shown in FIG. 5 (a), when each tip end is in contact with the outer peripheral surface of the spherical body 4 and the contact pressure of the spherical body 4 is large and acts on each tip end of the protrusion 7a. While the protrusions 7a are respectively deformed to reduce the area of the orifice, when the contact pressure of the spherical body 4 is small as in the above measurement when the cuff is depressurized, as shown in FIG. 5 (b). By making the deformation of the protrusion 7a hardly occur and increasing the area of the orifice, it is possible to supply air as shown by an arrow F in the figure.

As described above, it becomes possible to provide a pressure gauge balloon capable of exhausting at a constant speed that can be used even in blood pressure measurement in the cuff exhausting process.

[Effects of the Invention] As described above, according to the present invention, the air supply operation to the cuff performed through both the air supply check valve and the intake check valve, and the cuff decompression during blood pressure measurement. It is possible to provide an air balloon for a sphygmomanometer capable of always setting the exhaust speed at any time regardless of the magnitude of the cuff pressure.

[Brief description of drawings]

FIG. 1 is a cross-sectional view through the center plane of the sphygmomanometer air balloon of the first embodiment, and FIG. 2 is a partially cutaway external perspective view of the intake check valve of the sphygmomanometer air balloon of FIG. 3 (a), (b), and (c) are central cross-sectional views showing the explanation of the operation of the sphygmomanometer balloon, and FIG. 4 is used to configure the second embodiment of the intake check valve. 5 is an external perspective view of the ring-shaped body, and FIGS. 5 (a) and 5 (b) are cross-sectional views of the main part of the intake check valve using the ring-shaped body 7. In the figure, 1 ... Air supply bulb main body, 2 ... Air supply check valve, 3 ... Plug, 3a ... Notch, 3b ... Flow path, 4 ... Sphere, 5 ...
Intake check valve, 7 ... Ring-shaped body, 7a ... Projection.

Claims (2)

[Claims] 1. An air balloon main body which is made of a balloon-like elastic body and has two openings and is manually pressurized to feed air to a cuff, and an introduction state for introducing outside air into the air balloon main body. An intake check valve for movably incorporating a spherical body in the flow path and moving the spherical body to provide an exhausted state in which the air inside the air supply bulb main body is discharged, and the cuff is provided with the intake check valve. A sphygmomanometer air balloon comprising an air delivery check valve having a constant-speed exhaust function for depressurizing the sphere, wherein the inhalation check valve comprises: In this state, a ring-shaped body having a plurality of protrusions made of an elastic body is arranged to form an orifice at a portion which is moved and abutted in a state, and when the contact pressure of the spherical body on the protrusion is large, The ring-shaped body is greatly deformed to To reduce the opening area of the scan, also when the contact pressure against the protrusion of the sphere is small, transmission for a blood pressure monitor, characterized in that to increase the opening area of the orifice without substantial deformation balloon. 2. The orifice is formed from an opening formed in the main body of the intake check valve and the ring-shaped body inserted into the opening and having a predetermined thickness. The air balloon for a blood pressure monitor according to item 1.