JPH10155750A - Fixing structure of slow leak valve of hemomanometer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a reduction in cost of parts and a simplification of assembling work while accomplishing hourly stabilization of a fine pumping speed by a method wherein a nut is fastened on an end part of a holder to be screwed down on a slow leak thread to hold the slow leak valve with the holder and the nut. SOLUTION: A slow leak valve 6 which is made up of a bottomed hollow elastic material having a slit 6a is inserted into an air path 5 of a tubular slow leak holder 2 having the air path 5 provided on a forced exhaustion body 1 and a slow leak screw 7 is inserted into the slow leak valve 6 to adjust a clearance of a slit 6a. The underside of a flange 6b on a head part of the slow leak valve 6 is brought into contact with a stage part A provided in the air path of the slow leak holder 2 and the top surface of the flange 6b is pressed with the underside B of a nut 9 fastened on the end part of the slow leak holder 2 to secure. The underside of the flange part of the nut 9 is fixed on the face end of the slow leak holder 2 by ultrasonic welding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixed structure of a throttle valve for evacuating pressurized air in a cuff of a sphygmomanometer, and more particularly, to stabilization of a slosh speed. The present invention relates to a structure for fixing a throttle valve of a blood pressure monitor.

[0002]

2. Description of the Related Art In general, various sphygmomanometers such as an electronic sphygmomanometer wrap an arm band (cuff) around an arm of a person to be measured and pump air into the arm band to increase the arm band pressure by 20 to 30 m from the systolic blood pressure.
After the blood is blocked by pressurizing to a pressure of mHg or more, the pressurized air is evacuated at a very low speed. It detects pressure oscillation and automatically measures systolic and diastolic blood pressure values.

FIG. 2 is a side view showing a forced exhaust main body used in a sphygmomanometer. The forced exhaust body 1 comprises a slow leak holder-2, a rubber pipe connecting portion 3 and a forced exhaust button 4. The slow leak holder 2 is provided with a slow leak valve, and the slow leak holder is provided. Rubber ball 10 connected to -2
(Shown by imaginary line) is contracted, and air is sent to the arm band through the rubber valve 11 (shown by imaginary line) connected to the throttle valve 6 and the rubber tube connecting portion 3, and pressurized to a required pressure. After that, the air gradually escapes through the throttle valve 6. In the course of the air bleeding, a diaphragm-type pressure sensor built into the electronic sphygmomanometer detects a pressure oscillation due to a heartbeat and measures the blood pressure. Note that the forced exhaust button 4 is for evacuating the air in the arm band before measuring the blood pressure.
The air in the arm band can be released by contracting the arm band while pressing the forced exhaust button 4.

FIG. 3 is a sectional view showing a conventional structure for fixing a slow leak rubber valve, and FIG. 4 is a side view showing a slit side of the slow leak valve. FIG. 5 is a side view of the ring-type throttle valve showing the relationship between the throttle screw and the slit. It is formed of a tubular-shaped leak holder 2 having an air passage 5 provided in the forced exhaust main body 1 and a bottomed hollow elastic material having a slit 6a inserted into the air passage 5 of the holder 2. The throttle valve comprises a throttle valve 6 and a throttle screw 7 inserted into the throttle valve 6 for adjusting the clearance of the slit 6a. The throttle valve 6 is a throttle holder. The outer circumference of the head of the throttle valve 6 is fixed by the inner circumference of the ring 8 fitted to the end of the -2. The slow leak screw 7 has a screw on the outer periphery, and the slow leak screw 7 is screwed into the slow leak valve 6 so that it can be screwed in the direction of the slow leak valve 6. Thereby, the degree of opening of the gap of the slit 6a of the throttle valve 6 is changed to adjust the air leakage, that is, the slow exhaust.

The slow leak screw 7 has a through hole 7a through which air is passed. After the air is fed to the arm band and pressurized to a required pressure, the air passage 5 of the slow leak holder 2 is opened. The air is gradually exhausted to the atmosphere through the slit 6a of the throttle valve 6 and the through hole 7a of the throttle screw 7.

[0006] The throttle valve 6 is made of an elastic material and is generally made of rubber. And, the throttle valve 6
The gap between the slits 6a is widened on the outer periphery of the flange at the tip of the throttle screw 7 to adjust the air leakage, that is, the speed of the slow exhaust. Therefore, the screw advance position of the slow leak screw 7 is determined so that a desired air leak, that is, a slow speed exhaust (slow leak) speed can be obtained.

[0007]

However, in the structure of the conventional throttle valve, the speed of the air leak of the throttle valve 6 can be adjusted by directly adjusting the throttle screw 7 with a rubber throttle. -The slit 6a is pushed into the leak valve 6 and screwed forward.
Of the rubber throttle valve 6
, And the fixing position of the screw 7 was unstable.

Further, since the outer periphery of the head of the throttle valve 6 is fixed by the ring 8, stress is applied to the outer periphery of the head of the throttle valve 6. . as a result. Initially, the gap between the desired slits 6a is changed into rubber with the slow leak screw 7 with the passage of time, and the gap between the slits 6a of the slow leak valve 6 is opened, so that a very slow exhaust ( This caused a time-dependent change in the (slow leak) speed, causing instability of the slow leak speed.

In the structure of the conventional throttle valve, the ring 8 is fixed to the end of the throttle holder 2 by fitting. However, the ring 8 is made of a plastic material. Since there is a problem in the fitting due to the variation of the molding conditions of 2 and the processing accuracy of the ring 8, it is not possible to use the slow leak holder.
The adhesive is applied between the ring 2 and the ring 8 and fixed, but it is difficult to control the amount of the adhesive applied, and the fixing between the slow holder 2 and the ring 8 is not stable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object the purpose of the present invention.
G) To provide a structure for fixing a slow leak valve of a sphygmomanometer, which stabilizes the speed over time, reduces the cost of parts, and simplifies the assembling work.

[0011]

In order to achieve the above-mentioned object, the present invention provides a sphygmomanometer sphygmomanometer fixing structure for a sphygmomanometer, comprising: a holder having an air passage provided in a forced exhaust main body; A throttle valve made of a bottomed hollow elastic material having a slit inserted into the air passage of the holder, and a gap between the slits being adjusted by being inserted into the throttle valve. In a fixing structure of a slow leak valve of a sphygmomanometer provided with a slow leak screw having a through-hole which can be fixed to the end of the holder,
A nut screwed with a leak screw is provided, and the throttle valve is held by the holder and the nut.

Further, in the structure for fixing a slow leak valve of a blood pressure monitor according to the present invention, a flange is provided on an outer periphery of an end of the slow leak valve, and the flange is held between the holder and the nut. It is characterized in that it is held as such.

Further, in the structure for fixing a slow leak valve of a sphygmomanometer according to the present invention, a step is provided in the air passage of the holder, and one end of the flange of the slow leak valve is connected to the one end of the slow leak valve. The holder is received by the step portion, and the other end of the flange is received and held by the nut.

Further, in the structure for fixing the slow leak valve of the sphygmomanometer according to the present invention, the inner peripheral portion of the holder and the slow leak valve are connected to each other.
A clearance is provided between the leak rubber valve and the outer peripheral portion of the holding portion to hold the slow leak valve.

In the structure for fixing a slow leak valve of a sphygmomanometer according to the present invention, a flange is provided on the outer periphery of an end of the nut, and the lower surface of the flange and the end of the holder are fixed by ultrasonic welding. It is characterized by having done.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention will be described below with reference to an embodiment shown in the drawings. In the drawings, the same members as those of the related art are denoted by the same reference numerals, and description thereof will be omitted. FIG. 1 is a sectional view showing the structure of a main part of an embodiment of the present invention.

An elastic member having a hollow shape with a bottom having a tubular leak holder-2 having an air passage 5 provided in the forced exhaust main body 1 and a slit 6a inserted into the air passage 5 of the holder-2. The formed throttle valve 6 and the throttle valve 6
The throttle valve 6 is inserted into the suction valve 6 to adjust the clearance of the slit 6a. A nut 9 fixed to the end of the handle holder 2 by contacting the upper surface of the flange 6b with the step A provided in the
And is fixed by being pressed by the lower surface B. Since the flange 6b of the throttle valve 6 is fixed so as to be sandwiched between the stepped portion of the holder and the nut 9, the throttle valve 6 is fixed in the same manner as the conventional ring 8 is fixed. -The stress of the leak holder 2 is not received from the outer periphery of the throttle valve 6. As a result, the throttle valve 6 is
A gap G can be provided between the outer periphery of b and the leak holder 2 for fixing. Further, the lower surface of the flange portion of the nut 9 and the end surface of the slow leak holder 2 are fixed by ultrasonic welding.

The slow screw 7 has a screw at its head, and is screwed with the nut 9 so that it can be screwed in the direction of the slow valve 6 to provide a slow leak. By changing the degree of opening of the gap of the slit 6a of the valve 6, air leakage, that is, slow-speed exhaust can be adjusted. Also, the slow leak screw 7
Has a through hole 7a through which air is passed. After the air is fed into the arm band and pressurized to a required pressure, the air passage 5 of the throttle holder 2 and the throttle valve 6 are opened. Slit 6a,
The air is gradually exhausted to the atmosphere through the through hole 7a of the slow screw 7. The amount of opening of the slit 6a of the throttle valve 6 changes with air pressure by utilizing the elastic properties of the material of the throttle valve 6. That is, when the pressure in the cuff is high, the throttle valve 6 is pressed from the outside, and the opening amount of the slit 6a is reduced. Conversely, when the pressure in the cuff is reduced, the external pressing force is reduced. The opening amount increases. Therefore, the exhaust amount of the throttle valve 6 becomes constant, and the pressure in the arm band is reduced at a constant speed.

In the present embodiment, by adopting such a structure, the rubber screw 7 can be used as the rubber screw.
The screw is screwed to the nut 9 instead of the valve 6, so
By the screw 7, the distortion generated in the throttle valve 6 can be eliminated. Further, instead of the ring 8 being used to hold the throttle valve 6, the throttle valve 6 has a flange 6b provided on the head thereof and a stepped portion A provided in the air passage 5 of the throttle holder-2. And the lower surface B of the nut 9 are fixed so as to be sandwiched in the longitudinal direction of the throttle valve 6, so that the radial stress of the throttle valve 6 can be eliminated as in the related art. it can. Therefore, it is possible to reduce the change over time of the gap of the slit 6a of the slow leak valve 6 due to the strain or stress generated in the slow leak valve 6. Further, conventionally, the slow leak holder 2 and the ring 8 use an adhesive, but in this embodiment, the slow leak holder 2 and the nut 9 are fixed by ultrasonic welding. As a result, by using no adhesive, there was no problem in management of the amount of the adhesive, the bonding time, and the like, and the assembling work was simplified, the fixing stability was reduced, and the cost of parts was reduced. For example, the simplification of the assembling work has increased the productivity by about 30% compared to the conventional case.

In this embodiment, the flange 6b of the throttle valve 6 is connected to the stepped portion of the air passage of the throttle holder 2 so that no radial stress is applied to the throttle valve 6. And a nut 9 for fixing the throttle valve 6
The present invention is not limited to this embodiment as long as it is held in the longitudinal direction and fixed.

[0021]

As is clear from the above description, according to the present invention, the rubber screw is used to form the throttle screw.
By screwing the nut into a nut instead of the lock valve 6, distortion caused by the throttle screw in the throttle valve can be eliminated. Further, the holding of the throttle valve is not performed by a ring, but by holding and fixing in the longitudinal direction of the slider holder by a step portion and a nut provided on the throttle holder, so that the throttle valve is held. The stress generated in the radial direction of the valve can be eliminated. Therefore, slowing by stress
The time-dependent change of the gap of the slit due to the change in the material characteristics of the valve can be reduced, and the exhaust can be performed at a low speed (slow leak).
It is possible to obtain a sphygmomanometer slow leak valve that is stable over time.

Further, in the prior art, an adhesive has been used for the slow leak holder and the ring. In the present invention, however, the assembly work is simplified by fixing the slow leak holder and the nut by ultrasonic welding. As a result, the fixing stability and the cost of parts can be reduced.

[0023]

[Brief description of the drawings]

FIG. 1 is a sectional view showing a structure of a main part of an embodiment of the present invention.

FIG. 2 is a side view showing a forced exhaust main body used in the sphygmomanometer.

FIG. 3 is a sectional view showing a conventional structure for fixing a slow leak rubber valve.

FIG. 4 is a side view showing a slit side of a throttle valve.

FIG. 5 is a side view of a ring-type throttle valve showing a relationship between a throttle screw and a slit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Forced exhaust main body 2 Slow leak holder 3 Rubber pipe connection part 4 Forced exhaust button 5 Air passage 6 Slow leak valve 6a Slit 7 Slow leak screw 7a Through hole 8 Ring 9 Nut 10 Rubber ball 11 Rubber tube

Claims (5)

[Claims] 1. A slow leak formed of a bottomed hollow elastic material having a slit provided in an air passage of a forced exhaust main body and having a slit inserted into the air passage of the holder. A fixing structure of a slow leak valve of a sphygmomanometer having a valve and a slow leak screw having a through hole which can adjust a gap of a slit by being inserted into the slow leak valve. A nut fixed to an end of the holder and screwed into the slow leak screw, and the slow leak valve is held by the holder and the nut. A structure for fixing a slow leak valve of a sphygmomanometer. 2. The apparatus according to claim 1, wherein a flange is provided on an outer periphery of an end portion of the throttle valve, and the flange is held between the holder and the nut. A structure for fixing a slow leak valve of a sphygmomanometer. 3. A step portion is provided in the air passage of the holder, one end of the flange of the throttle valve is received by the step portion of the holder, and the other end of the flange is connected by the nut. The structure for fixing a throttle valve of a sphygmomanometer according to claim 1, wherein the structure is adapted to receive and hold. 4. An inner peripheral portion of said holder and said slot.
4. A slow leak rubber valve for an electronic sphygmomanometer according to claim 3, wherein a gap is provided between the outer circumferential portion of the holding portion of the rubber stopper and the slow leak valve. Fixed structure. 5. The nut according to claim 1, wherein a flange is provided on an outer periphery of an end of the nut, and the lower surface of the flange and an end of the holder are fixed by ultrasonic welding. Fixing structure of the slow rubber valve of the electronic blood pressure monitor of the present invention.