JPH0345240A - Air feed bulb for hemodynamometer - Google Patents

Abstract

PURPOSE:To set the exhaust speed in the blood pressure measurement in the decompression of a kerf uniform by forming an orifice at the shift contact position in the state where the kerf is in decompressed and a bulb body is in the discharge state. CONSTITUTION:An air feeding check valve 2 and an intake check valve 5 are installed by being press-fitted into the both opened port parts 1a and 1b of an air feeding bulb body 1. As for the air flow passage 2a of the air feeding check valve 2, one edge is opened towards the inside of the air feeding bulb body 1, and the other edge is formed as an opened port part 2b, and a thin plate is inserted into the opened port part 2b, and each orifice is formed at the both edges of the plate. Therefore, the opened port part 2b is largely opened in the positive pressure state inside the air feeding bulb body 1, and the orifice of the opened port part 2b is closed in th negative pressure state, and the contraflow of the supplied are for pressurizing a kerf is prevented, and since the opening area of the orifice at the opened port part 2b can be varied according to the kerf pressure, the uniform exhaust for the kerf is carried out, and the blood pressure measurement in the decompression of the kerf is carried out.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air balloon for a blood pressure monitor used in an electronic blood pressure monitor or the like.

[Prior Art] A conventional air balloon for a blood pressure monitor used in an electronic blood pressure monitor or the like is constructed as follows. In other words, the main body of the air balloon is made of a balloon-shaped elastic body and has two openings, and the outer circumferential surface is manually pressurized to supply air to the cuff. An intake check valve is provided on one of the openings so as to be movably built in and to be able to enter an introduction state for introducing outside air into the interior of the main body and an exhaust state for discharging the air inside the main body by moving the sphere. I was trying to send air into the cuff.

On the other hand, the applicant has provided an air supply check valve with a constant speed exhaust function on the other side of the opening of the main body as a device configuration for measuring blood pressure when the cuff is decompressed, and the air supply check valve and the above-mentioned intake The proposal is to perform constant-speed exhaust through both valves of the check valve, but the intake check valve is originally opened when the pressure inside the air balloon becomes negative, but when the pressure inside the air balloon becomes negative, Its basic operating principle is to close the cuff when it becomes positive pressure, and in order to allow the exhaust gas to pass through the intake check valve when the cuff is depressurized, the airtight precision of the sphere being brought into the discharge state has been carefully maintained. It is set low.

[Problems to be Solved by the Invention] However, as a result of the conventional air balloon for blood pressure monitor being configured as described above, cuff depressurization is performed through both the air supply check valve and the intake check valve. There was a problem in that the pumping speed for blood pressure measurement could not be set constant due to low accuracy.

Therefore, the blood pressure monitor air balloon of the present invention was developed in view of the above-mentioned problems, and its purpose is to reduce cuff pressure during cuff depressurization through both the air supply check valve and the intake check valve. An object of the present invention is to provide an air balloon for a sphygmomanometer in which the pumping speed for blood pressure measurement can be set constant.

[Means for Solving the Problem] and [Operation] In order to achieve the above-mentioned problems and achieve the purpose, the air balloon for a blood pressure monitor of the present invention has the following configuration: a balloon-shaped elastic body; an air balloon body that is manually pressurized and has two openings to supply air to the cuff; an introduction state that introduces outside air into the interior of the air balloon body; and an introduction state that introduces outside air into the interior of the air balloon body; A sphere is movably built in the flow path to control the discharge state by the movement of the sphere, and an intake check valve is provided at one of the openings, and a constant speed exhaust function is provided when depressurizing the cuff. The air supply balloon for a blood pressure monitor is provided with an air supply check valve on the other side of the opening of the air supply bulb, the orifice being provided at a portion where the cuff is depressurized and the sphere moves and abuts in the ejected state. and serves to perform a constant rate evacuation function when depressurizing the cuff through the orifice.

Preferably, when the sphere is brought into the ejection state, an annular ring body made of an elastic body integrally formed with a plurality of protrusions that come into contact with the sphere is disposed at the portion so that the protrusions The orifice serves to perform a constant-speed evacuation function when decompressing the cuff through the orifice.

[Example] Hereinafter, an example 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 sectional view taken through the center plane of the air balloon for a blood pressure monitor according to the first embodiment. In this figure, the air supply check valve 2 and the intake check valve 5 are an air supply balloon body made of a balloon-shaped elastic body.
They are press-fitted into both openings 1a and 1b, respectively, as shown in the figure. The air supply check valve 2 is made of silicone rubber with a rubber hardness of about 40 degrees, and is integrally formed with a mounting base and a wedge-shaped flat part 2c on both sides.

The air flow path 2a of the air supply check valve 2 shown by the broken line has one end opened toward the inside of the air supply balloon main body 1 as shown, and the other end formed as an opening 2b having a linear shape. A plate with a thickness of about 0.05 mm is inserted into this opening 2b, and orifices are formed at both ends of this plate.

As a result, when the pressure inside the balloon body 1 is positive, the opening 2b opens wide, but when the inside of the balloon body 1 is under a large negative pressure, the orifice of the opening 2b is closed and the cuff cannot be pressurized. In addition to having the function of preventing air from flowing backwards, the opening area of the orifice of the opening 2b is configured to be variable according to the cuff pressure, so that the cuff can be evacuated at a constant level and the cuff pressure can be reduced. This makes it possible to measure blood pressure at any time.

Next, the intake check valve 5 forms a flow path 5a in the longitudinal direction, and has a notch 4 at a portion facing the inside of the air balloon body 1.
A passage stopper part 5b is provided to introduce outside air into the inside, while a stopper part 3 is press-fitted, glued, etc. on the atmosphere-opening side, and a sphere 4 is inserted in the longitudinal direction in this flow path 5a. It allows movement in both directions of the arrow.

An opening channel 3b is bored in the center of the plug body 3, and an orifice is formed at the corner of the opening channel 3b and the wall surface of the opening channel 3b that comes into contact with the sphere 4. A plurality of notches 3a are formed for this purpose.

Next, FIG. 2 is a partially cutaway external perspective view of the intake check valve 5 of FIG. 1. In this figure, the intake check valve 5 is a flow path 5a.
is formed in the longitudinal direction, and from the outer circumferential surface portion 5C attached to the air balloon main body l, a passage plug body portion 5b is formed with a plurality of notches H (four in this figure) as shown. This allows air to be supplied through the notch H when the sphere 4 is moved toward the passage stopper portion 5b.

On the other hand, the sphere 4 is connected to the air passage 5a on the air-opening side of the intake check valve 5.
After being placed inside, the plug body 3 is provided by being press-fitted, glued, etc. Note that even if the plug 3 and the intake check valve 5 are integrally molded in a shape that does not allow the passage plug 5b to be caulked, the passage plug 5b may be caulked after the sphere 4 is introduced through the opening on the passage plug 5b side. good. An opening passage 3b is bored in the center of the plug body 3, and an orifice is formed at the corner of the opening passage 3b and the wall surface of the opening passage 3b that comes into contact with the sphere 4. Four notches 3a are formed.

The total orifice area of these notches 3a is set to be sufficiently smaller than the total orifice area of the notches H formed in the passage plug body 5b. The function is to prevent backflow of intake air.

The operation of the air balloon for blood pressure monitor described above will now be explained based on the drawings.

FIGS. 3(a), 3(b), and 3(c) are central cross-sectional views illustrating the operation of the air balloon for a blood pressure monitor.

First, in FIG. 3(a), when air is supplied to the cuff, when the external part of the air balloon body 1 is manually pressurized in the direction of the double arrow, the inside of the air balloon body 1 temporarily becomes positive pressure. Therefore, the sphere 4 in the intake check valve 5 is moved toward the stopper 3, and the opening 2b of the air supply check valve 2 is opened.

As a result, air is supplied in the six directions of arrows in the figure, and air is supplied in the direction of arrow B in the figure through the orifice formed by the notch 3a formed in the stopper 3 of the intake check valve 5. It turns out. The air supplied in the direction of arrow B is set to be sufficiently smaller than the air supplied in the direction of arrow A, so that the original function of the intake check valve 5 can be achieved.

Next, in FIG. 3(b), when the manual pressurization of the external part of the air balloon body 1 is released, the elastic return force of the air balloon body 1 itself causes the air balloon body 1 to return to the position indicated by the double arrow before pressurization. As the condition returns, air will be supplied in the direction of arrow C and in the direction indicated by the arrow in the figure, but this time the amount of air supplied through the notch H of the intake check valve 5 will be larger. As a result, the air balloon body 1 returns to its original shape. Thereafter, similarly (a)
The conditions shown in (b) and (b) are repeated to pressurize the cuff.

Next, FIG. 3(c) is a diagram showing how blood pressure is measured during cuff decompression, in which air is supplied from the cuff in the direction of arrow E in the figure and via the notch 3a of the intake check valve 5. Air supply in the direction of arrow F is now performed. As a result, even in an automatic sphygmomanometer using the air balloon main body 1, it becomes possible to perform exhaustion at a constant rate necessary for blood pressure measurement during cuff decompression.

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

FIGS. 5(a) and 5(b) are sectional views of essential parts of an intake check valve using the ring-shaped body 7, and also serve as operational diagrams. In this figure, the ring-shaped body 7 is disposed as shown in the wall forming the flow path 5 formed on the atmosphere opening side of the intake check valve main body, and is attached to the protrusion 7a. Each tip comes into contact with the outer peripheral surface of the sphere 4, and the sphere 4
When a large contact pressure acts on each tip of the protrusion 7a, the protrusion 7a deforms as shown in FIG. 5(a), reducing the area of the orifice, while When the contact pressure of the sphere 4 is small, as in the case of measurement during cuff decompression, the area of the orifice is increased so that almost no deformation of the protrusion 7a occurs, as shown in FIG. 5(b). In particular, 2 allows air to be supplied as shown by arrow F in the figure.

As described above, it is possible to provide a pressure gauge air balloon that can be used for blood pressure measurement during the cuff evacuation process and is capable of evacuation at a constant rate.

[Effects of the Invention] As explained above, an air supply balloon for a blood pressure monitor is provided in which the pumping speed for blood pressure measurement during cuff depressurization, which is performed through both the air supply check valve and the intake check valve, can be set constant. can do.

[Brief explanation of drawings]

Fig. 2 is a sectional view passing through the center plane of the air balloon for a blood pressure monitor according to the first embodiment, Fig. 2 is a partially cutaway external perspective view of the intake check valve of the air balloon for a blood pressure monitor of Fig. Figures 3 (a), (b), and (c) are central cross-sectional views showing the operation of the air balloon for a blood pressure monitor, and Figure 4 is used to construct the second embodiment of the intake check valve. The external perspective view of the ring-shaped body, FIGS. 5(a) and 5(b) are sectional views of essential parts of an intake check valve using the ring-shaped body 7. In the figure, 1...Air supply balloon body, 2...Air supply check valve, 3.
...Plug body, 3a...Notch part, 3b...Flow path part, 4.
... Sphere, 5... Intake check valve, 7... Ring-shaped body,
7a...Protrusion.

Claims (2)

[Claims] (1) An air balloon body made of a balloon-shaped elastic body and having two openings and which is manually pressurized to supply air to the cuff; an introduction state in which outside air is introduced into the inside of the air balloon body; An air intake check valve is provided at one of the openings, and an air intake check valve is provided in one of the openings, and a sphere is movably built into the flow path to discharge the air inside the air supply bulb body, and the air is discharged from the air inside the air supply bulb body. An air supply balloon for a sphygmomanometer, comprising an air supply check valve having a constant speed exhaust function when the cuff is depressurized and the sphere moves in the evacuation state, the air supply balloon being provided with an air supply check valve having a constant speed exhaust function at the other end of the opening of the air supply balloon. An air balloon for a blood pressure monitor, characterized in that an orifice is formed in a portion to be brought into contact with the air balloon. (2) When the sphere is brought into the ejection state, an annular ring made of an elastic body integrally formed with a plurality of protrusions that come into contact with the sphere is disposed in the region to provide a gap between the protrusions. The air balloon for a blood pressure monitor according to claim 1, characterized in that the orifice is the orifice.