JPH0321206Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention provides a pressure control device that is interposed between an arm cuff and a pressurizing ball that pressurizes air into the arm cuff, and performs slow and rapid exhaustion of the air in the cuff. Regarding the exhaust valve of the meter.

BACKGROUND ART In a blood pressure monitor, it is necessary to operate a pressure bulb to increase the air pressure in the cuff, and then gradually lower the air pressure. 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.
This operation is performed by opening the exhaust valve and gradually exhausting the air inside the cuff.

In addition, the exhaust valve that automatically performs the above exhaust operation is
For example, Utility Model Publication No. 12802/1983 or Japanese Patent Application Laid-open No. 1983-12802
It is described in Publication No. 14321.

Problems to be Solved by the Invention However, with the manual exhaust valve of the conventional blood pressure monitor mentioned above or the automatic exhaust valve as described in Publication No. 12802/1980, the internal pressure of the wrist cuff is high from the early stage of exhaustion. It is difficult to maintain a constant rate of decompression during the process of gradual decrease in blood pressure, which has the disadvantage that blood pressure measurements become inaccurate. Also, Unexamined Japanese Patent Publication No. 7-
The device described in Publication No. 14321 can maintain a constant rate of decompression within the cuff, but its mechanism is extremely complicated, so it lacks versatility as an exhaust valve for a blood pressure monitor.

Therefore, in view of the above-mentioned drawbacks of the conventional ones, the present invention aims to change the decompression speed of slow exhaust, which gradually exhausts the air in the cuff, from the initial stage of high pressure to low pressure without complicating the configuration. It is an object of the present invention to provide an exhaust valve for a sphygmomanometer that can maintain blood pressure constant until the final stage of exhaustion and improve blood pressure measurement accuracy.

Means for Solving the Problems The present invention has been constructed as follows as a technical means for achieving its purpose.

That is, the exhaust valve of the blood pressure monitor according to the present invention is interposed between a cuff and a pressurizing ball that pressurizes air into the cuff, and has a quick evacuation valve mechanism operated by a push button and a pressurizing valve. Equipped with a slow exhaust valve mechanism that gradually exhausts the air inside the wrist cuff after pressurizing air into the wrist cuff by operating a ball, and the slow exhaust valve mechanism is released to the outside air via the push button shaft cylinder of the rapid exhaust valve mechanism. In the push button shaft cylinder, an air passage blocking plate made of a ring-shaped elastic body is placed on the outside, and a disc-shaped air passage blocking plate is placed on the inside facing each other. A ring-shaped protrusion is formed on at least one of the opposing surfaces of the road blocking plate, and the rib is sandwiched between a rib integrally formed inside the push button shaft cylinder and a pressure regulating body fitted on the outside, so that both sides can be ventilated. The present invention is characterized in that the pressure reduction speed of the slow exhaust gas exhausted through the opposing surface of the road blocking plate is adjusted by operating the pressure regulator.

Function: When the pressure bulb is operated to measure blood pressure, pressurized air is forced into the cuff through the exhaust valve. Then, if the pressure ball is operated until the cuff reaches a certain pressurized state and then the operation is stopped, the pressurized air inside the cuff will flow from the push button barrel to a small amount between the pair of air passage blocking plates. It is gradually exhausted to the outside air through the gap, and the internal pressure of the cuff gradually decreases. The pressure reduction speed during the slow evacuation can be arbitrarily adjusted and set by adjusting the degree of pressure contact between the pair of air passage blocking plates by the pressure regulating body. In addition, the pair of ventilation path blocking plates are elastic bodies, and the pressurized air intervenes between the pair of ventilation blocking plates, so the gap between them increases as the pressure inside the cuff increases, and the pressure decreases. Since the pressure decreases accordingly, the pressure reduction speed is kept constant throughout the entire pressure reduction process.

Note that when the blood pressure measurement is finished, the air in the cuff can be rapidly exhausted by operating the push button of the rapid exhaust valve mechanism.

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.
The air supply port cylinder 2 and the 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 6 is fitted into the lower part of the shaft cylinder 5 of the push button 4. The shaft cylinder 5 of the push button 4 is pressed by a compression spring 7, and the sealing member 6 is pressed against the valve seat 8 of the valve body 1. A mechanism 9 is configured. Further, the lower end of the barrel 5 of the push button 4 is opened inside the valve body 1, and the upper end is opened to the outside air through the exhaust port 10 of the push button 4. An exhaust path is formed. A rib 11 is provided inside the shaft cylinder 5.
A pair of air passage blocking plates 12, 1 made of an elastic material are provided on the top.
3 is fitted, and a pair of ventilation path blocking plates 12,
13 has a pressure regulating body 14 formed by forming a screw on the outer periphery or press-fitting an elastic member to adjust the degree of pressure contact. Furthermore, a protrusion 15 is formed on the opposing surface of at least one of the air passage blocking plates 12. A ventilation passage 16 is formed in the pressure regulating body 14 . A slow exhaust valve mechanism 17 is constituted by the shaft cylinder 5, the air passage blocking plates 12, 13 fitted therein, and the pressure regulator 14. A check valve 18 is fitted into the air supply pipe 2 .

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 a blood pressure monitor body, and 24 is a rubber tube connected to the cuff 18.

When measuring blood pressure, when the pressure bulb 20 is operated, pressurized air is forced into the cuff 19 through the slit of the check valve 18, and this operation is repeated to bring the cuff 19 to a predetermined pressure state. do. And pressure ball 2
When the pressurizing operation by 0 is stopped, the pressurized air in the arm cuff 19 is gradually discharged from the barrel 5 of the push button 4 to the outside air through the pressure gap between the pair of ventilation blocking plates 12 and 13, and this slow speed Due to the exhaust action, the cuff 19
The air pressure decreases at a constant rate of decompression.

That is, the pair of ventilation blocking plates 12 and 13 are made of an elastic body, and the pressurized air intervenes between the pair of ventilation blocking plates 12 and 13, so the pressure gap is large when the air pressure is high and when the pressure is low. Since the pressure decreases as the pressure increases, the speed of pressure reduction is kept constant throughout the entire process of pressure reduction of the cuff 19. Therefore, the accuracy of blood pressure measurement is improved.

Note that rapid exhaustion after blood pressure measurement is performed by operating the push button 4.

Effects of the invention Since the present invention is configured and operates as described above, the decompression speed of the slow exhaust that gradually exhausts the air in the cuff can be adjusted without complicating the configuration in any way. The blood pressure can be kept constant from the initial stage to the final stage, resulting in the effect of improving the accuracy of blood pressure measurement.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention,
1 is a longitudinal sectional side view, FIG. 2 is a sectional view taken along line A--A in FIG. 1 of the barrel, 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 cylinder, 3... Air supply port cylinder, 4... Push button, 5... Its shaft cylinder, 9... Rapid exhaust valve mechanism, 11... Rib, 12, 13...Air passage blocking plate, 14...Pressure regulating body, 17...Slow speed exhaust valve mechanism, 19...Archive, 20...Pressure ball, 23...
...Sphygmomanometer itself.

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. The slow exhaust valve mechanism is equipped with a slow exhaust valve mechanism that gradually exhausts the air in the band, and the slow exhaust valve mechanism forms a ventilation path to outside air through the push button barrel of the rapid exhaust valve mechanism, and , an air passage blocking plate made of a ring-shaped elastic body is placed on the outside, and a disc-shaped air passage blocking plate is placed on the inside facing each other,
A ring-shaped protrusion is formed on at least one of the facing surfaces of both air passage blocking plates, and the rib is sandwiched between a rib integrally formed within the push button shaft cylinder and a pressure regulating body fitted on the outside, 1. An exhaust valve for a blood pressure monitor, characterized in that the pressure reduction speed of slow exhaust gas exhausted through opposing surfaces of both air passage blocking plates is adjusted by operating the pressure regulator.