JPS6314809Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exhaust valve device in a blood pressure measuring device, which allows the rate of depressurization of exhaust air during blood pressure measurement to be freely set to a suitable state with a simple configuration.

A conventional setting means in this type of exhaust valve device is formed in a tubular body (exhaust valve) disposed in a pipe of an air path, as shown in, for example, Japanese Utility Model Application Publication No. 55-21730. In this conventional example, the linear member is held between the slits.
The method of fixing the wire members is difficult in manufacturing, and in order to adjust or change the decompression rate, it is necessary to select wire members with different diameters, which is a very troublesome work.

An object of the present invention is to provide an exhaust valve device for a blood pressure measuring device that has a simple configuration and can adjust and set the exhaust pressure reduction rate to a suitable state.

An embodiment of the present invention will be described below based on the drawings.

Reference numeral 1 denotes a case (pipe line) disposed in a part of the air supply/exhaust route in the blood pressure device, and the narrow opening on the right side is connected to the branching point of the route to the cuff and the route to the display device. The inside of the case 1 is formed as a three-stage cylindrical space.

2 is a flange portion 2a made of a flexible member such as rubber.
This is a cup-shaped exhaust valve with A slit 2b is formed along it.

3 is a ring that is supported by the maximum diameter part of the space of the case 1 and also supports the exhaust valve 2 by sandwiching the flange 2a of the exhaust valve 2 between the second step 1a of the case 1, and forms a female thread. are doing.

Reference numeral 4 denotes an adjustment screw having a male thread that engages with the female thread of the ring 3, which forms a hole 4a that connects the cup space of the exhaust valve 2 to the atmosphere, and whose tip 4b is connected to the cup space side of the exhaust valve 2. It is in close contact with the flange end surface 2a'.

5 is a coil spring interposed in the space between the ring 3 and the adjustment screw 4 in the thrust direction.

Here, if there is no or very weak pressing force on the exhaust valve 2 by the adjusting screw 4, the exhaust valve 2 will not deform as shown in FIG. 2, and the opening amount of the slit 2b will be the minimum. placed in a state.

Then, when the adjusting screw 4 is rotated and moved to the right to increase the pressing force in the thrust direction against the exhaust valve 2, the cylindrical shell bends and deforms in accordance with the strength of the pressing force, and the slit opens. The opening amount of 2b increases.

For example, if the initial setting value of the opening amount of the slit 2b is set to the state shown in FIG. By being pressed by
As pressure is applied to reverse the previous deformation, the opening amount of the slit 2b becomes smaller as shown in FIG.

As the exhaust pressure decreases, the opening amount of the slit 2b returns from the state shown in FIG. 4 to the state shown in FIG. 3.

That is, when the exhaust pressure is high, the opening amount of the slit 2b is small but the exhaust speed is fast, and when the exhaust pressure is low, the opening amount of the slit 2b is large but the exhaust speed is slow. Therefore, the exhaust pressure is reduced at a substantially constant rate over time.

As described above, the present invention forms a slit in the longitudinal direction (thrust direction) in the cup of a cup-shaped exhaust valve with a flange, and presses the end face of the flange of the exhaust valve to apply thrust direction force to the exhaust valve. The opening amount of the slit is adjusted by giving Therefore, the opening amount of the slit, which determines the pressure reduction effect, is set by causing a longitudinal bending action on the cylindrical shell to adjust the opening amount of the slit.
Although it has a simple structure and is easy to assemble, it has a great practical effect of allowing a wide range of variation in the opening amount of the slit.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing one embodiment of the exhaust valve device of the present invention, and FIGS. 2 to 4 are bottom views showing different states of the exhaust valve 2 in FIG. 1. 1... Case, 2... Exhaust valve, 2a... Flange,
2b...Slit, 3...Ring, 4...Adjustment screw.

Claims (1)

[Scope of Claim for Utility Model Registration] A blood pressure measuring device having an exhaust valve in the air path conduit, which is made of a flexible material formed in the shape of a cup with a flange at one end, and a side surface of the cup. An exhaust valve having a slit formed in a part along the longitudinal direction and fixedly supported by pinching the outer edge of the flange, and an end face of the flange near the space side of the cup of the exhaust valve. On the other hand, the slit includes a pressing force adjustment member that can move forward and backward in the same direction and applies an adjustable pressing force to the exhaust valve; An exhaust valve device for a blood pressure measuring device, characterized in that the opening amount of the slit of the exhaust valve can be variably set by adjusting the pressing force in the thrust direction against the cup portion.