JPS5937206Y2 - Rapid exhaust device in blood pressure monitor - Google Patents

Description

[Detailed description of the invention] The present invention relates to a blood pressure monitor equipped with a constant speed exhaust valve and a rapid exhaust valve as means for decompressing and exhausting the pressurized air supplied to the arm cuff. The purpose of this invention is to improve the rapid pumping configuration in order to efficiently carry out continuous measurements by pumping the air in a short period of time.

As shown in FIG. 1, the conventional structure of this type of rapid exhaust system includes a valve chamber 2, an inlet passage 3 connected to the valve chamber 2, and an outlet passage 4.
A valve body 5 that moves forward and backward with respect to the chamber 2 is located within the valve chamber 2 of the valve body 1, which is comprised of a through hole 10 through which an operating rod 6 is inserted, and a through hole 10 connected thereto. The exhaust passage of the exhaust hole 11 is normally closed by the valve body 5.

In the case of rapid exhaust, the heir 7 is pressed to move the valve body 5 away from the valve housing 9 against the spring 8 to open the exhaust passage, and when the pressing operation is released, the valve body 5 is moved again. The exhaust passage is closed by the action of the spring 8.

Note that 12 indicates a check valve. Therefore, in this structure, the legitimate child 7
Rapid evacuation φ is performed only while pressing .

By the way, when looking at the relationship between rapid exhaust and arm cuff internal pressure, the exhaust effect is generally good while the arm cuff internal pressure is high, but as the internal pressure decreases, the exhaust effect worsens, and eventually some air is released into the arm cuff. Intraband vc%ru.

In order to completely remove this residual amount of air, it is necessary to keep the rapid exhaust valve open for a long period of time.

For this reason, in the above-mentioned rapid exhaust structure, it is necessary to keep pressing the eldest child 9 for a long time in order to completely expel the air in the cuff.
It's very annoying.

If there is any remaining air in the cuff, the remaining air will track the living body during continuous measurement, making it impossible to obtain accurate measured values.

Further, when the arm cuff is stored, the remaining air in the arm cuff makes it bulky and inconvenient to store.

The present invention has been proposed to solve the above-mentioned conventional problems, and will be described in detail below with reference to the drawings.

FIG. 2 shows the configuration of the rapid exhaust system according to the present invention, and FIG. 3 is a partial perspective view of the main parts thereof.

In FIG. 2, reference numeral 21 denotes a valve body, which is composed of a valve chamber 22, an inlet passage 23, and an outlet passage 24, which are connected to the valve chamber 22.

A check piece 25 is provided in this inflow path 230 portion.

A needle valve 27 that moves forward and backward with respect to the valve seat 26 is located within the valve chamber 22, and the valve 27 is supported by a spring 28V? −
Therefore, it is always energized in the direction of the valve seat 26.

Reference numeral 29 denotes a valve housing that is attached via a valve holder 30 above the valve seat 26, and is screwed onto the valve body 21.

Inside the valve housing 29 is a valve rod 3 of the needle valve 27.
1 is located, and a push button 32 that faces the upper end of the valve rod 31 and slides up and down is located.
It protrudes outward from the upper end opening of 9.

Inside the valve housing 29, an exhaust passage is formed which reaches the exhaust hole 33 via the hole 26A of the upper valve seat 26.

FIG. 3 is an exploded perspective view showing the relationship between the valve housing 29, the valve rod 31, and the push button 32. A cylindrical portion 32B provided on the peripheral wall is integrally formed with the claw portion 3.
2A, . . . are formed on the inner circumferential wall of the valve housing 29.
It fits into the grooves 29A, . . . of the steel structure 29A, .
The push button 32 is guided in the vertical direction of the valve housing 29 by the action of the claw portions 32A, .

Further, a first inclined step portion connected to the steel structure 29A and formed in the side force thereof at a lower position between the three grooves 29A, . . . of the valve housing 29, and the related Q. 29B and a second sloped step 29C connected to the first sloped step 29B, and the second sloped step 29C is connected to the grooves 29AVc.

The upper end 31A of the valve rod 31 having the needle valve 27 is fitted into the cylindrical portion 32B via the spring 34, and the claw portion 32A of the cylindrical portion 32B is positioned slightly below the upper end. A sleeve 31C facing the valve rod 31 and having teeth 31B around the periphery that engage with the push button 32 when the push button 32 is pressed is provided integrally with the valve rod 31, and the sleeve 31C
At the bottom thereof, three claw portions 31D are provided in the same relationship as the claw portions 32A.

Therefore, the claw portions 31D are usually also fitted into the grooves 29A of the protective housing 29.

That is, the needle valve 27 is always held at the upper end position (exhaust passage closed position) where it abuts against the valve seat 26 by the spring 28, and at this time, the sleeve 31 of the valve rod 31 (J-formed claw portion 32A... ... is the groove 29A of the valve housing 29, ...
... and the spring 28
The upper end 31A of the valve rod 31 is fitted into the cylindrical portion 32B of the push button 32 by compressing the spring 34, which is set smaller than the biasing force of the push button 32, and the push button 32 is positioned at the upper end of the valve housing 29.

This is the state shown in FIG.

When the push button 32 is first pressed to open the exhaust passage, the claws 32A of the cylindrical portion 32B are guided by the grooves 29A of the valve housing 29 and lowered. At the same time, the claw portions 32A, . They are guided by the grooves 29A, . . . of the housing 29 and are lowered together against the spring 28.

Therefore, the needle valve 27 is separated from the valve seat 26 and moved to the open position.

During this downward movement, the claw portion 31D of the sleeve 31C,
Since the valve rod 31 becomes freely rotatable when it comes out of the groove 29A of the valve housing 29, the claw portion 32A of the cylindrical portion 32B, etc. . . . and the claw portion 31D of the sleeve 3TC, .

At this time, when the push button 32 is released, the valve rod 31 is urged upward by the spring 28, and the rotation of the valve rod 31 causes the claw portion 31D of the sleeve 31C to move upward.

. . . does not match the position of the groove 29A of the valve housing 29,
The upper end of the claw portion 31D is the groove 29 of the valve housing 29.
A first inclined step portion 29B formed on the side along AK
is engaged with.

The upward movement of the valve rod 31 is stopped by this engagement action, and the needle valve 27 of the valve rod 31 is held in the open state separated from the valve seat 26, and the push button 32 is held by the action of the spring 34.
Only the return works.

This allows the outflow passage 24, valve chamber 22 . A path is formed between the hole 26A of the valve seat 26 and the exhaust hole 33 to perform rapid exhaust.

Next, if the rapid exhaust passage is to be closed, the push button 32 is pressed again.

Then, the claw portion 32A of the cylindrical portion 32B becomes the groove 29.
A, .
, . . . press the teeth 31B of the valve rod 31 engaged from the first inclined step portion 29BK, and lower the valve rod 31 as well.

As the valve rod 31 descends, the claw portion 31D of the sleeve 31C
, . . . The upper end is disengaged from the first inclined stepped portion 29B, and the valve rod 31 becomes rotatable again, and the cylindrical portion 3
2B's claw portions 32A, . . . and sleeve 31C's claw portions 31D, . . . meshing (inclination relationship of mutual teeth)
As a result, the valve rod 31 is further rotated in the direction of arrow A, and when the push button 32 is released from the depression, the valve rod 31 is urged upward by the spring 28.

Then, as the valve rod 31 rotates, the claw portion 31 of the sleeve 31C
D, . . . correspond to the second inclined step portion 29CJ formed on the side of the first inclined step portion 29B of the valve housing 29, and these claw portions 31D, . The claw portions 31D, . . . are guided in the inclination direction by the mutual action of the slope and the second slope step portion 29C1, and the second slope step portion 29C2.・Groove 29A connected to...
The claws 131D of the sleeve 31C reach the position.

As a result, the engagement of the claw portions 31D, . . . is completely released, and the action of the spring 28 causes the claw portions 31D, .
..., the valve rod 31 returns upwards and the push button 32 is pressed again.
will also return.

This return causes the needle valve 27 to come into contact with the valve seat 26,
The exhaust passage to the exhaust hole 33 is closed.

With such a configuration of the rapid exhaust device, when pressurized air sent to the cuff is to be rapidly exhausted, the needle valve 2T is stably held at the open position by simply pressing the push button 32. It is extremely convenient when keeping the exhaust passage open for a long time, such as when completely removing air from the cuff, and there is no need to keep pressing the cuff with your hands like in the past, so you can press the cuff with both hands. Evacuation can be made more effective, and handling operations, especially during continuous measurement, are easier.

As described above, in the rapid exhaust system of the present invention, the rapid exhaust valve has a structure that has stable points in two states, the open position and the open position, so that the valve can be in the open state during rapid exhaust. It has the characteristics that it can be held, the pressurized air in the cuff can be easily and effectively exhausted, and it is easy to handle, especially for continuous measurements, etc.

Furthermore, in the rapid exhaust device of the present invention, the rapid exhaust valve closes → opens → closes open → closes only by pressing the push button.
. . , etc. are repeated in sequence, and the rotation operation of the push button is unnecessary, and the labor associated with the rotation operation of the push button can be saved.

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the structure of a conventional rapid exhaust system, Figure 2
The figure is a block diagram showing the structure of the rapid exhaust system of the present invention, and FIG. 3 is an exploded perspective view showing the main parts of FIG. 2. 21: valve body, 22: valve seat, 23: inflow path, 24: outflow path, 26: valve seat, 27: needle valve, 28 spring,
29: Valve housing, 31: Valve rod, 32: Push button, 33: Exhaust hole,
29A: groove, 29B: first inclined step, 29C: second inclined step, 31B: tooth, 31C varnish leaf, 31D: pawl, 32A: pawl, 32B two cylinders, 34 spring.

Claims (1)

[Claims for Utility Model Registration] Pressurized air supplied to the cuff is exhausted at a constant speed by a valve body composed of a valve chamber, an inflow path, and an outflow path, and the exhaust path provided in the valve chamber is A blood pressure monitor that rapidly exhausts the pressurized air using a formed valve seat and a needle valve that is opened and closed by the valve seat, a valve housing located on the upper blade of the valve seat, and a part that moves up and down within the valve housing. A valve rod to which a needle valve is connected, a push button that slides upward and downward at the upper end of the valve rod, and a spring that biases the valve rod toward the upper part of the valve housing, the push button having a claw, The valve rod has a pawl and teeth that engage in a predetermined relationship with the pawl of the push button and receive a rotational action through the engagement, and the valve housing has a groove that guides the pawl and a lower end of the groove that locks the pawl of the valve rod. The pressing operation of the push button causes the valve rod to be shifted to a groove passage position of the valve casing or a step locking position of the valve casing due to the rotational action, and the valve stem is moved to the upper end or the lower end of the groove of the valve casing. 1. A rapid exhaust device for a blood pressure monitor, characterized in that the needle valve is fixed to the valve and has a structure that stabilizes the needle valve in an open or closed state.