JPH0321205Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is interposed between an arm cuff and a pressurizing ball that presses air into the arm cuff, and performs slow and rapid exhaustion of the air inside the cuff. Regarding the exhaust valve of a blood pressure monitor.

[Prior art] When measuring blood pressure, the air pressure inside the cuff wrapped around the arm is increased to stop blood circulation in the arm artery, and then the air pressure inside the cuff is gradually lowered. I need. For this reason, in conventional blood pressure monitors, a push-button exhaust valve is installed in the middle of the air pipe that connects the pressure bulb and the cuff, and the exhaust valve is opened to gradually release the air inside the cuff. This operation was performed by discharging the liquid (see Utility Model Publication No. 12802/1983).

In addition, an exhaust valve for a blood pressure monitor that can perform slow exhaust without operating a push button is known (Japanese Patent Application Laid-open No. 1987-
(See Publication No. 90465).

[Problems to be solved by the invention] By the way, slow exhaust during blood pressure measurement is
It is desirable to reduce the air pressure in the cuff as constant as possible from the start of exhaustion to the end of exhaustion. Since the operation of the push button requires a high level of skill, there are considerable differences in blood pressure measurement results depending on the person taking the measurement, and there are problems with measurement accuracy and reliability of the measured value.

On the other hand, even if anyone could obtain the same measurement results by using the exhaust valve of the blood pressure monitor described in JP-A No. 57-90465, the valve mechanism that determines the slow exhaust amount per hour However, the needle needle is simply sandwiched between a pair of valve bodies that are pressed together to form a slit that does not match the circumference, and the exhaust passage leading to the exhaust side of the valve mechanism that determines the slow exhaust volume is narrow. Even if slow exhaust is performed at a preset speed at the beginning of slow exhaust from a place with high ventilation resistance, the exhaust speed will decrease as the air pressure in the cuff approaches the end of slow exhaust. The problem was that the blood pressure not only decreased, but also the displacement varied irregularly over time, making the blood pressure measurement results inappropriate.

Therefore, in view of the problems of the conventional ones as described above, the present invention has developed a slow exhaust valve mechanism using a stepped support structure in which the inner elastic ring of a pair of elastic rings is formed on the inner periphery of the air supply port cylinder. The air supply port cylinder is fitted with the inner elastic ring to form an exhaust passage around the inner elastic ring, and the outer elastic ring is fitted into the air supply port cylinder to seal the air supply port cylinder. A ring-shaped protrusion is formed on at least one of the opposing surfaces of the elastic ring,
A pressure regulating body having a cavity communicating with the pressurized sphere side is provided outside the elastic ring, and the pair of elastic rings are sandwiched between the step-shaped support part and the pressure regulating body, and the opposing surfaces of the pair of elastic rings are connected from the exhaust path. By forming a slow exhaust passage through the cavity of the pressure regulating body to the pressure ball side, the gap between the pair of elastic rings that determines the slow exhaust volume can be adjusted finely and in alignment over the entire circumference by the pressure regulating body. At the same time, the ventilation resistance of the air exhausted at a slow speed is extremely low because the exhaust passage that follows the gap that determines the slow speed exhaust volume is a cavity in the pressure regulator.
It is possible to maintain a constant exhaust speed not only at the beginning of slow exhaust, but also at the end of slow exhaust when the air pressure in the cuff decreases, eliminating irregular fluctuations in slow exhaust over time. Therefore, it is an object of the present invention to provide an exhaust valve for a blood pressure monitor that can always obtain appropriate blood pressure measurement results.

[Means for Solving the Problems] The present invention is configured as follows as a technical means for achieving the above object. That is, it is interposed between the arm cuff and a pressure ball that presses air into the cuff, and has a quick exhaust valve mechanism operated by a push button, and a pressure ball that presses air into the cuff by operating the pressure ball. The slow exhaust valve mechanism is equipped with a slow exhaust valve mechanism that gradually exhausts the air in the wristband, and the slow exhaust valve mechanism is a pair of check valve elements fitted into the seal part of the check valve body in the air supply port cylinder that connects the pressurizing bulb. and a pressure regulating body that adjusts the degree of pressure contact between the pair of elastic rings within the air supply port cylinder, and the inner elastic ring of the pair of elastic rings is connected to the inner circumference of the air supply port cylinder. The outer elastic ring is fitted into the step-shaped support formed in the inner elastic ring to form an exhaust passage around the inner elastic ring, and the outer elastic ring is fitted into the air supply port cylinder to seal the air supply port cylinder. , a ring-shaped protrusion is formed on at least one of the opposing surfaces of the pair of elastic rings, and a pressure regulating body having a cavity communicating with the pressurizing ball side is provided on the outside of the elastic ring, thereby forming the pair of elastic rings. is sandwiched between a step-shaped support part and a pressure regulating body, and a slow exhaust passage is formed from the exhaust passage to the pressurizing ball side through the opposing surfaces of a pair of elastic rings and the cavity of the pressure regulating body. This was used as an exhaust valve for a blood pressure monitor.

[Effect] When measuring blood pressure, when the pressure bulb is operated, pressurized air is forced into the arm cuff through the check valve of the inlet tube, so the arm cuff stops the blood flow in the arm artery. If you operate the pressure ball until it reaches a pressure state and then stop operating it, the pressurized air in the cuff will flow into the entire circle formed between the pair of elastic rings fitted in the seal part of the check valve body. It passes through a ring-shaped gap that is in alignment over the circumference, and through the cavity of the pressure regulating body, and is gradually exhausted to the pressure ball side, and the internal pressure of the cuff gradually decreases. The pressure reduction speed of the slow exhaust can be adjusted and set by adjusting the degree of pressure contact between the pair of elastic rings by the pressure regulator.

Then, the slow exhaust valve mechanism fits the inner elastic ring of the pair of elastic rings into a stepped support formed on the inner periphery of the air supply port cylinder, and exhausts air around the inner elastic ring. The outer elastic ring is fitted into the air supply port cylinder to form a channel and seal the air supply port cylinder, and at least one of the opposing surfaces of the pair of elastic rings is provided with a ring. Moreover, since the pair of elastic rings are sandwiched between the step-shaped support part and the pressure regulating body, the gap between the pair of elastic rings, which determines the slow displacement amount, is controlled by the pressure regulating body. It can be adjusted in a consistent state and minutely over the entire circumference, and a slow exhaust passage is formed from the slow exhaust passage to the pressurizing ball side through the opposing surfaces of the pair of elastic rings and the cavity of the pressure regulating body. The exhaust gas that has passed through the gap between the pair of elastic rings that determines the amount of exhaust gas is discharged into the pressurized sphere with almost no flow resistance, so it can be used not only at the initial stage of the exhaust, but also during the exhaust when the air pressure inside the wristband decreases. Even at the end of the period, a constant pumping speed is maintained, and there is no irregular fluctuation of the slow pumping amount over time, making it possible to obtain appropriate blood pressure measurement results.

[Example] An embodiment of the present invention will be described with reference to the drawings.

1 and 2, 1 is a valve body, and the valve body 1 includes an air supply port cylinder 2 and an air supply port cylinder 3.
are formed, and these air supply port cylinder 2 and air supply port cylinder 3 are communicated within the valve body 1. A push button 4 is attached to the upper part of the valve body 1, and a seal member 5 is fitted in the lower part of the push button 4. The push button 4 is pushed up by a compression spring 6, and the seal member 5
is pressed against the valve seat 7 of the valve body 1, thereby forming a quick exhaust valve mechanism 8 using the push button 4. Further, a check valve body 9 made of an elastic material such as rubber is fitted into the air supply port cylinder 2, and a flange 10 of the check valve body 9 is shaped like a step inside the air supply port cylinder 2. It is in contact with the support part 11 of. 12 is a slit. 13 and 14 are a pair of elastic rings,
The pair of elastic rings 13 and 14 are arranged at a sealing part 15 between the flange 10 of the check valve body 9 and the air supply port cylinder 2, and the inner elastic ring 13 is fitted into the step-shaped support part 11, and the inner elastic ring 13 is fitted into the stepped support part 11, The outer elastic ring 14 is fitted into the air supply port tube 2, and the inside of the air supply port tube 2 is sealed. A pressure regulating body 16 having a cavity is attached to the open end of the air supply port cylinder 2, and the cavity of the pressure regulating body 16 communicates with the exhaust passage to form an exhaust passage. Of the pair of elastic rings 13 and 14, the outer elastic ring 14 has a ring-shaped protrusion 17 formed on the surface facing the inner elastic ring 13, and is shaped like a step by the pressure regulator 16. Adjusting the pressure contact degree of the pair of elastic rings 13 and 14 immovably supported by the support part 11 of
The opposing gap between the pair of elastic rings 13 and 14 can be aligned and finely adjusted over the entire circumference. This mechanism constitutes the slow exhaust valve 18.

As shown in FIG. 3, the exhaust valve configured as described above is interposed between the arm cuff 19 of the blood pressure monitor and the pressurizing bulb 20 that pressurizes air into the arm cuff 19. That is, the rubber tube 21 on the pressure bulb 20 side is attached to the air supply port tube 2.
However, the rubber tube 22 on the cuff 19 side is attached to the air inlet tube 3.
is connected. 23 is the blood pressure monitor body, and 24 is a rubber tube connecting it to the cuff 19.

When measuring blood pressure, when the pressurizing bulb 20 is operated, pressurized air is forced into the cuff 19 through the slit 12 of the check valve body 9. This operation is repeated to reduce the air pressure inside the cuff 19. to a state of pressure that stops blood circulation in the arteries in the arm. Then, when the pressurizing operation by the pressurizing ball 20 is stopped, the pressurized air in the cuff 19 is transferred to the pair of elastic rings 1 at the sealing part 15 of the check valve body 9.
3 and 14, through a gap formed in alignment over the entire circumference by a ring-shaped protrusion 17, and through the exhaust passage around the inner elastic ring 13 and the cavity of the pressure regulating body 16. The air is then exhausted into the pressurized sphere 20 at a very low speed.

By the way, the slow exhaust valve mechanism 18 has a stepped support portion 11 in which the inner elastic ring 13 of the pair of elastic rings 13 and 14 is formed on the inner periphery of the air supply port cylinder 2.
The outer elastic ring 14 is fitted into the air supply port cylindrical body 2 to form an exhaust passage around the inner elastic ring 13, and the outer elastic ring 14 is fitted into the air supply port cylinder 2 to seal the air supply port cylinder 2. In addition, a ring-shaped protrusion 17 is formed on the outer elastic ring 14 of the opposing surfaces of the pair of elastic rings 13 and 14, and the pair of elastic rings 13 and 14 have a step-shaped support section. 11 and the pressure regulating body 16, the gap between the pair of elastic rings 13 and 14 that determines the slow displacement amount can be adjusted finely and in alignment over the entire circumference by the pressure regulating body 16. In addition, a slow exhaust passage is formed from the slow exhaust passage to the pressurizing ball 20 side through the opposing surfaces of the pair of elastic rings 13 and 14 and the cavity of the pressure regulating body 16, and the opposing surface that determines the slow exhaust amount has a ring shape. A pair of elastic rings 13, 14 having protrusions 17 on
Since the air that has passed through the opposing surface is then discharged to the pressurizing bulb 20 with almost no flow resistance, it can be used not only at the beginning of the slow exhaust, but also at the end of the slow exhaust when the air pressure inside the cuff 19 decreases. Since a constant pumping speed is maintained, there is no irregular fluctuation phenomenon of slow pumping amount over time, and an appropriate blood pressure measurement result can be obtained.

[Effects of the invention] Since the present invention is constructed and operates as described above, a ring-shaped protrusion formed on at least one of the opposing surfaces of a pair of elastic rings that determines the slow displacement amount by the pressure regulator. This allows the gap between the elastic rings to be aligned and finely adjusted over the entire circumference, and the exhaust passage that follows the gap that determines the amount of air exhaust at a slow speed is the cavity of the pressure regulator. The ventilation resistance is extremely low, and it is possible to maintain a constant exhaust speed not only at the beginning of slow exhaust, but also at the end of slow exhaust when the air pressure in the cuff decreases, and to prevent irregularities in slow exhaust over time. The effect of eliminating fluctuation phenomena and always obtaining appropriate blood pressure measurement results is obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
1 is a longitudinal sectional side view of the exhaust valve, FIG. 2 is a sectional view taken along the line A--A in FIG. 1, and FIG. 3 is a plan view showing an example of a blood pressure monitor. DESCRIPTION OF SYMBOLS 1... Valve body, 2... Air supply port tube, 3... Air supply port tube, 8... Rapid exhaust valve mechanism, 9... Check valve body, 1
3, 14...Pair of elastic rings, 15...Seal portion, 16...Pressure regulating body, 17...Ring-shaped protrusion,
18...Slow speed exhaust valve mechanism, 19...Archive, 20...
...Pressure bulb, 23...Sphygmomanometer body.

Claims (1)

[Scope of utility model registration request] This device is interposed between the arm cuff and a pressure ball that presses air into the cuff, and includes a quick exhaust valve mechanism operated by a push button, and a rapid exhaust valve mechanism that presses air into the cuff by operating the pressure ball, and then presses air into the cuff. Equipped with a slow exhaust valve mechanism that gradually exhausts the air in the band, the slow exhaust valve mechanism has a pair of elastic valves fitted into the seal part of the check valve body in the air supply port cylinder that connects the pressurizing bulb. and a pressure regulating body that adjusts the degree of pressure contact between the pair of elastic rings in the air supply port cylinder, and the inner elastic ring of the pair of elastic rings is formed on the inner periphery of the air supply port cylinder. The outer elastic ring is fitted into the stepped support part to form an exhaust passage around the inner elastic ring, and the outer elastic ring is fitted into the air supply port cylinder to seal the air supply port cylinder. A ring-shaped protrusion is formed on at least one of the opposing surfaces of the pair of elastic rings, and a pressure adjusting body having a cavity communicating with the pressurizing ball side is provided outside the elastic rings, so that the pair of elastic rings are stepped. The pressure regulating body is sandwiched between a shaped support part and a pressure regulating body, and a slow exhaust passage is formed from the exhaust passage to the pressure bulb side through the opposing surfaces of a pair of elastic rings and the cavity of the pressure regulating body. meter exhaust valve.