JPH0434806Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an exhaust valve of a blood pressure monitor connected between a cuff and a device for pressurizing air into the cuff.

[Prior Art] Generally, in a blood pressure monitor, it is necessary to operate a pressurizing bulb (or other pressurizing device) to increase the air pressure in the cuff, and then gradually decrease the air pressure. For this reason, conventional blood pressure monitors are equipped with a push-button exhaust valve in the middle of the air pipe that connects the cuff to the pressurizing device, and the exhaust valve is opened to drain the air inside the cuff. It does this by gradually discharging it.

In addition, the exhaust valve that automatically performs the exhaust operation is
For example, it is described in Japanese Unexamined Patent Publication No. 14320/1983.

[Problem to be solved by the invention] By the way, in the exhaust valve of the blood pressure monitor described in the above-mentioned Japanese Patent Application Laid-open No. 57-14320, the air supply flow path from the pressurizing bulb to the cuff is closed during air supply. Opens by pressure air flow,
A slit valve is provided that closes during slow exhaust, but since a large amount of high pressure air passes through this slit valve during air supply, fatigue occurs in the slit part.
It will not be completely sealed during slow evacuation, making it impossible to maintain a constant decompression speed during slow evacuation.
The drawback is that blood pressure measurements may be inaccurate.

Therefore, in view of the above-mentioned drawbacks of the conventional ones, the present invention has been developed to develop a blood pressure monitor that can maintain a constant slow exhaust of the cuff even after multiple uses and improve blood pressure measurement accuracy. The purpose is to provide an exhaust valve.

[Means for Solving the Problems] The present invention is configured as follows as a technical means for achieving the above object. That is, in an exhaust valve connected between an arm cuff and a device for pressurizing air into it, a cylinder body inserted into the air supply port cylinder and an elastic valve member covering the outer periphery of the cylinder body are provided to prevent the inside of the cylinder body. The air supply flow path and the slow exhaust flow path are formed between the cylindrical body and the elastic valve member so that the air supply flow path and the slow exhaust flow path constitute different valve mechanisms, and an air supply slit is formed at the tip of the elastic valve member. What is claimed is: 1. An exhaust valve for a blood pressure monitor, characterized in that a slow exhaust slit is formed on the circumferential surface of an elastic valve member.

That is.

Note that the exhaust valve of the blood pressure monitor in the present invention means an exhaust valve having a slow exhaust function, and a rapid exhaust valve is not necessarily required, and for example, only a rapid exhaust valve may be provided separately.

[Function] When the pressure bulb (or other pressurizing device) is operated during blood pressure measurement, pressurized air is forced into the cuff through the air supply path of the exhaust valve. Air supply is continued until the arm cuff reaches a certain pressurized state, and when the operation is stopped, the pressurized air inside the arm cuff gradually passes through the slow exhaust flow path from the slow exhaust slit of the exhaust valve. The air is exhausted at a slow rate, and the internal pressure of the cuff gradually decreases.

As mentioned above, the pressurized air when supplying air to the cuff is
The air supply slit at the tip of the elastic valve member is opened and passed from the tip of the cylinder, but since the tip of this elastic valve member faces the tip of the cylinder, the air supply slit is used to pass pressurized air during air supply. It opens evenly against the flow of air and does not deform irregularly, and immediately returns to its original sealed state after air is supplied, and no air leaks from that part during slow exhaust. Therefore, the rate of pressure reduction due to slow evacuation is kept constant over a long period of time.

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

In FIG. 1, 1 is a valve body, and the valve body 1 is formed with an air supply port cylinder 2 and an air supply port cylinder 3, and these air supply port cylinders 2 and 3 are connected to the valve body. They are communicated within 1. A push button is attached to the upper part of the valve body 1, and a seal member 5 is fitted into 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. has been done.

Further, a valve mechanism 9 is formed in the air supply port cylinder 2, and has a different air supply flow path and a slow exhaust path. As shown in FIG. 2, this valve mechanism 9 is composed of a cylindrical body 10 and an elastic valve mechanism 11 that covers the outer periphery of the cylindrical body 10. , its proximal end side is hinged to the inlet portion of the air supply port cylinder 2 via a bush 12 that is fitted and bonded thereto. The elastic valve member 11 has a tip 11a that is longer than the cylindrical body 10 and has a conical shape.
The base end portion 11b is brought into contact with the inlet side step portion 2a of the air supply port cylinder 2, and is fixed by the bushing 12 via a packing 13 for preventing torsional deformation of the elastic valve member 11 and keeping it airtight. ing. Reference numeral 11c is a support protrusion at the tip, which is formed integrally with the elastic valve member 11. An air supply slit 14 is formed in the conical end surface of the elastic valve member 11, and a slow exhaust slit 15 is formed around the elastic valve member 11. The contact portion 11d of the elastic valve member 11 with respect to the cylindrical body 10 is positioned so as not to overlap with the slow exhaust slit 15. As shown in FIG. 3, a plurality of slow exhaust grooves 16 and 17 are formed at the base end of the cylindrical body 10. Moreover, 10a is a guide line for moving the cylinder 10 linearly with respect to the axis, and the bush 12 is formed with a groove 12a corresponding to the guide line 10a.

As shown in FIG. 4, the exhaust valve configured as described above is interposed between the arm cuff 18 of the blood pressure monitor and the pressure bulb 19 that pressurizes air into the arm cuff 18. That is, the rubber tube 20 of the pressurizing bulb 19 is placed in the air supply port tube 2.
A rubber tube 21 on the cuff 18 side is connected to the air supply port cylinder 3. 22 is a blood pressure monitor main body, and 23 is a rubber tube that connects it to the cuff 18.

To measure blood pressure, when the pressure bulb 19 is operated, pressurized air is forced into the cuff 18 from the cylinder 10 through the air supply slit 14 of the elastic valve mechanism 11, so this operation is repeated. The cuff 18 is brought into a predetermined pressure state. Then, when the pressurizing operation by the pressurizing ball 19 is stopped, the pressurized air in the cuff 18 passes from the air supply tube 2 through the slow exhaust slit 15 of the elastic valve member 11 and the slow exhaust grooves 16 and 17 of the sleeve 10. The air pressure in the cuff 18 decreases at a constant deceleration rate due to this slow evacuation action.

In the valve mechanism 9 in the air supply port tube 2, the air supply flow path and the slow exhaust flow path are different from each other as described above, so that no high-pressure, high-volume air passes through the slow exhaust slit 15, and its opening degree is No deviation occurs.
Therefore, the rate of decompression of the arm cuff 18 is kept constant over a long period of time, and the accuracy of blood pressure measurement is improved.

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

In the above embodiment, the tip 1 of the elastic valve member 11
1a is formed in a conical shape so as to correspond uniformly to the tip opening of the cylindrical band 10 over the entire circumference, and since the air supply slit 14 is formed on the tip surface, the tip opening of the cylindrical body 10 is formed in the shape of a cone when air is supplied. The air supply slit 14 opens evenly and does not deform irregularly even when receiving pressurized air ejected from the air supply slit 14, and the air supply slit 14 maintains a completely closed state during slow exhaust, and the pressure is reduced during slow exhaust. This prevents the air supply slit 14 from expanding. Further, since the supporting protrusion 11c is formed on the side surface of the elastic valve member 11, the elastic valve member 11
itself is precisely positioned within the air supply port cylinder 2.

[Effects of the invention] Since the present invention is constructed and operates as described above, the air supply slit opens evenly to the flow of pressurized air during air supply, prevents irregular deformation, and improves the air supply. The air immediately returns to its original sealed state, and during slow exhaust, where air is gradually exhausted from the slow exhaust slit through the slow exhaust flow path, no air leaks from the air supply slit, allowing the blood pressure monitor to be used for a long period of time. Even if the device is used many times, the slow exhaust of the arm body can be kept constant, and the blood pressure measurement accuracy can be improved.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention,
FIG. 1 is an overall longitudinal sectional side view, FIG. 2 is a partially enlarged longitudinal sectional side view, FIG. 3 is a perspective view of a cylinder, and FIG. 4 is a plan view showing an example of a blood pressure monitor. DESCRIPTION OF SYMBOLS 1... Valve mechanism, 2... Air supply port cylinder, 3... Air supply port cylinder, 8... Rapid exhaust valve mechanism, 9... Valve mechanism, 10
... cylinder body, 11 ... elastic valve mechanism, 12 ... bushing, 13 ... gasket, 14 ... air supply slit,
15...Slow speed exhaust slit, 16, 17...Slow speed exhaust groove, 18...Archive, 19...Pressure ball, 22...
...Sphygmomanometer itself.

Claims (1)

[Scope of utility model registration request] In an exhaust valve connected between a cuff and a device that presses air into it, a cylinder inserted into the air supply port cylinder and an elastic valve member covering the outer periphery of the cylinder are provided to control air supply flow inside the cylinder. A slow exhaust flow path is formed between the cylindrical body and the elastic valve member to constitute a valve mechanism in which the air supply flow path and the slow exhaust flow path are different from each other, and an air supply slit is formed at the tip of the elastic valve member. An exhaust valve for a blood pressure monitor, characterized in that a slow exhaust slit is formed on the circumferential surface of the elastic valve member.