CN108378836A - Gas exhaust inspecting mechanism and blood pressure measuring device - Google Patents
Gas exhaust inspecting mechanism and blood pressure measuring device Download PDFInfo
- Publication number
- CN108378836A CN108378836A CN201810352724.0A CN201810352724A CN108378836A CN 108378836 A CN108378836 A CN 108378836A CN 201810352724 A CN201810352724 A CN 201810352724A CN 108378836 A CN108378836 A CN 108378836A
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- Prior art keywords
- air inlet
- air
- cylinder body
- pressure
- spool
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/02141—Details of apparatus construction, e.g. pump units or housings therefor, cuff pressurising systems, arrangements of fluid conduits or circuits
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
- A61B5/02233—Occluders specially adapted therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
- A61B5/021—Measuring pressure in heart or blood vessels
- A61B5/022—Measuring pressure in heart or blood vessels by applying pressure to close blood vessels, e.g. against the skin; Ophthalmodynamometers
- A61B5/0235—Valves specially adapted therefor
Abstract
The invention discloses a kind of gas exhaust inspecting mechanism and blood pressure measuring device, which includes：First cylinder body；Dividing body, it is set in the first cylinder body, and the first cylinder body is divided into upper chamber and lower chambers, and the upper end of the first cylinder body has the first air inlet and exhaust outlet that are connected to upper chamber, there is the second air inlet, external pressure gas to enter lower chambers by the second air inlet for the lower end of first cylinder body；Spool is located at the top of body respectively and opposite with the first air inlet position, and can be moved up and down with dividing body；Wherein：First air inlet is a counterbore, and counterbore increases along the orient diameter that moves down of spool, and spool is moved up to block the first air inlet in counterbore, moved down so that the first air inlet open.The present invention by the first air admission hole by being arranged to counterbore shape, so as to reduce knots modification of the spool amount of movement to passage section, so that the gas exhaust inspecting mechanism of the present invention can be such that air bag more stablizes and uniformly be vented.
Description
Technical field
The present invention relates to the field of medical instrument technology, more particularly to a kind of gas exhaust inspecting mechanism and have the gas exhaust inspecting
The blood pressure measuring device of mechanism.
Background technology
Blood pressure measuring device (e.g., sphygmomanometer) is widely used, and there are outfit in hospital and family.It is examined using blood pressure measuring device
Measuring blood pressure enables the patient to grasp the blood pressure situation of itself constantly with direction of medication usage or medical treatment.
Blood pressure measuring device in the prior art would generally include cuff, force (forcing) pump, controller, pressure sensor and row
Air valve.Cuff for binding patient's upper arm, in equipped with air bag, the air inlet of force (forcing) pump and air bag connects for for air bag
Inflation, exhaust row connect with the exhaust outlet of air bag, are to select a good opportunity to make air bags, pressure sensor is for detecting in air bag
Pressure, the pressure of air bag of the controller measured by pressure sensor control force (forcing) pump and air bleeding valve, so as to work as force (forcing) pump
When so that the pressure in air bag reaching preset value, force (forcing) pump is made to close, control air bleeding valve is opened, so that air bag is exhausted.
The effect of air bleeding valve is particularly critical, during measuring blood pressure, when force (forcing) pump pressurizes, needs to control at air bleeding valve
In closed state, and when force (forcing) pump closes and needs to make air bags, need to control air bleeding valve opening, it is important that：Exhaust
Valve needs to make the gas in air bag to be discharged with a certain flow rule, for example, air bleeding valve need to make the gas of air bag with determining perseverance
Fixed flow value discharge, this requires controller can control air bleeding valve spool fast move it is accurate to required position or
Person generates accurate displacement.
In the prior art using solenoid valve as above-mentioned air bleeding valve, that is, generated by being passed through electric current to electromagnet
Electromagnetic force drives spool to be moved to required position or generates the displacement required by one section, however, passing through electromagnetic force control
Valve core movement processed can not make spool accurately be moved to very much required position or spool cannot be made to generate accurate position
It moves (wherein, electromagnetic force is a reason for causing spool displacement inaccurate with the inhomogeneities of distance change).
To solve this problem, occurs a kind of air bleeding valve in the prior art, the air bleeding valve is by an elastic membrane by valve
It is divided into two chambers, wherein first chamber has the air inlet being connected to air bag and the exhaust outlet to circulate with ambient atmosphere,
Wherein second chamber tool is there are one air inlet, and exterior power is passed through by the air inlet in the chamber, and spool is arranged first
In chamber, and the air inlet being connected in elastic membrane and with first chamber is opposite.When needing to block the air inlet of first chamber,
It is ventilated to second chamber using exterior power, elastic membrane is deformed the pressure in second chamber so that spool blocks first chamber
Air inlet, when need exhaust when, reduce second chamber in pressure, make its pressure be less than air bag in pressure (at this time, it is assumed that
Elastic diaphragm deformation does not need pressure and spool does not need pressure), in this way, spool can beat the air inlet of first chamber
It opens, enters first chamber to make the gas in air bag pass through air inlet, and be discharged by exhaust outlet, and by changing the second chamber
Distance of the indoor pressure change spool apart from the end face of air inlet, and then change the passage section of gas to change the stream of gas
Amount.
Above-mentioned air bleeding valve does not utilize electromagnetism force control valve core, and makes to control spool using air pressure, the size of air pressure compared with
It is easy to control, it is therefore, above-mentioned the displacement of spool to be made more accurate in the way of pressure control spool, and then make flow
Control is more accurate.
However, there are following defects for above-mentioned air bleeding valve：
Since the outlet end of air inlet is a flat surface, spool can only influence the passage section of gas in the trip segment of very little
(distance of the spool far from outlet end decides gas flow), when in air bag despite pressure fluctuations or actuating unit carried
When the gas pressure of confession fluctuates, can force spool generate shift position, and spool even if occur compared with thin tail sheep can
The passage section of gas is significantly influenced, air inlet seriously destroys the balance of spool, that is to say, that the air bleeding valve of above structure
Spool face gas pressure fluctuation when stability it is poor, the ability for restoring suitable position is also poor.
Invention content
For the above-mentioned technical problems in the prior art, the embodiment provides a kind of gas exhaust inspecting machines
Structure.
In order to solve the above technical problems, the embodiment of the present invention the technical solution adopted is that：
A kind of gas exhaust inspecting mechanism, including：
First cylinder body, is inside formed with chamber；
Dividing body is set in first cylinder body, and the chamber in first cylinder body is divided into upper chamber under
Chamber, the upper end of first cylinder body have the first air inlet and exhaust outlet that are connected to the upper chamber, first cylinder
There is the second air inlet, external pressure gas to enter the lower chambers by second air inlet for the lower end of body；
Spool is located at the top of body respectively and opposite with first air inlet position, and can be with described point
Body is cut to move up and down；Wherein：
First air inlet is a counterbore, and the counterbore increases along the orient diameter that moves down of the spool,
The spool is moved up in the counterbore to block first air inlet, is moved down so that described first
Air inlet open.
Preferably, the counterbore is bellmouth, and the upper end of the bellmouth forms end face, when the spool and the end
Face against when, the spool blocks first air inlet.
Preferably, the dividing body includes：
Slip ring, with the inner wall sealing of first cylinder body with merge can be free to slide along first cylinder body；
Second cylinder body is located in the middle part of the slip ring；
Connection strap, circumferentially between second cylinder body and the slip ring；
Elastic membrane is blocked and is surrounded between second cylinder body, the slip ring and adjacent two connection straps
Hollow-out part；
The gas exhaust inspecting mechanism further includes buffer gear；
The buffer gear includes：
Piston rod, the vertical lower end for being fixed on first cylinder body；
Piston, is fixed on the upper end of the piston rod, and in second cylinder body and can be along second cylinder
Body is free to slide, offered on the piston axially through for throttling duct；
Spring is set in second cylinder body and is resisted against the piston.
Preferably, the lower end of first cylinder body, which blocks, an air inlet seat, and the air inlet seat offers air inlet port, it is described into
The port of stomata road towards one end of the upper chamber forms second air inlet.
Preferably, the air inlet port has a plurality of, and the second progress mouth is correspondingly formed multiple；Wherein：
The lower end of the piston rod is fixed in the air inlet seat, and multiple second air inlets are arranged in the air inlet seat
Around.
The invention also discloses a kind of blood pressure measuring devices, which is characterized in that including：
Air bag is arranged inside in cuff；
Above-mentioned gas exhaust inspecting mechanism；
Air pump；Wherein：
The air pump is connected to the air bag and with the second air inlet of the lower chambers respectively；
The air bag is connected to the first air inlet of the upper chamber.
Preferably, the blood pressure measuring device further includes pressure sensor, control valve group and controller；
The pressure sensor is used to measure the gas pressure in the pouch；
The control valve group includes
First electromagnetic switch valve, be connected between the air pump and the air bag for control the air pump with it is described
Break-make between air bag；
Electromagnetism fixed pressure reducing valve is connected between first electromagnetic switch valve and the air bag；
Solenoid-operated proportional pressure reducing valve is connected between the air pump and the second air inlet of the lower chambers；
Second electromagnetic switch valve, be connected between the air pump and the second air inlet of the lower chambers and with the electricity
Magnetic proportional pressure-reducing valve is arranged in parallel；
Third electromagnetic switch valve is connected with the solenoid-operated proportional pressure reducing valve, and positioned at the air pump and the electromagnetism ratio
Between example pressure reducing valve；
Controller is configured to：
It when needing to the airbag aeration, controls the air pump and starts, and control first electromagnetic switch valve and the
Two electromagnetic switch valves are opened, and are controlled the third electromagnetic switch valve and are closed；
It is needed after the pressure in the air bag detected by the pressure sensor reaches predetermined value and maintains the predetermined time
When making the air bags, the controller controls first electromagnetic switch valve and the second electromagnetic switch valve is closed, control
The third switch valve is opened；Also, the pressure that the controller detects in real time according to the pressure sensor is to change
The electric current of electromagnetic coil in solenoid-operated proportional pressure reducing valve is stated to change the outlet pressure of the solenoid-operated proportional pressure reducing valve.
Preferably, overflow valve is additionally provided at the gas outlet of the air pump, the overflow valve is for maintaining the air pump
Outlet pressure.
Compared with prior art, the advantageous effect of gas exhaust inspecting mechanism disclosed by the invention is：The present invention is by by first
Air admission hole is arranged to counterbore shape, so as to reduce knots modification of the spool amount of movement to passage section, so that the present invention
Gas exhaust inspecting mechanism can be such that air bag more stablizes and uniformly be vented.
Description of the drawings
(the first air inlet is in quilt to the front view for the gas exhaust inspecting mechanism that Fig. 1 is provided by one embodiment of the present of invention
Sealed condition).
Fig. 2 is the A of Fig. 1 to sectional view.
Fig. 3 is the enlarged view of the local B of Fig. 1.
(the first air inlet is in the front view for the gas exhaust inspecting mechanism that Fig. 4 is provided by an alternative embodiment of the invention
By sealed condition).
(the first air inlet is in the front view for the gas exhaust inspecting mechanism that Fig. 5 is provided by an alternative embodiment of the invention
Opening state).
Fig. 6 is the enlarged view of the Local C of Fig. 5.
Fig. 7 is the relational graph of the displacement and the passage section for limiting gas flow of the spool of the present invention.
Fig. 8 is the enlarged view of the local F of Fig. 5.
The enlarged view that Fig. 9 is the local D of Fig. 5 (the first cylinder body is in the state for moving down or moving down trend).
The enlarged view that Figure 10 is the local D of Fig. 5 (the first cylinder body is in the state for moving up or moving up trend).
Figure 11 is the enlarged view of the local E of Fig. 5.
Figure 12 is the G-G of Figure 11 to sectional view.
(air bag is in inflation to the structural schematic diagram for the blood pressure measuring device that Figure 13 is provided by one embodiment of the present of invention
State).
(air bag is in exhaust to the structural schematic diagram for the blood pressure measuring device that Figure 14 is provided by one embodiment of the present of invention
State).
The control schematic diagram of controller in the blood pressure measuring device that Figure 15 is provided by one embodiment of the present of invention.
Figure 16 is the relationship between spool and air inlet and topology view in the prior art.
Figure 17 is the relational graph of the displacement and the passage section for limiting gas flow of spool in the prior art.
In figure：
The first cylinder bodies of 10-；11- upper chamber；The first air inlets of 111-；The end faces 111-；112- exhaust outlets；12- lower chambers；
The second air inlets of 121-；30- spools；31- connecting rods；40- dividing bodies；41- slip rings；The second cylinder bodies of 42-；421- end caps；
43- connection straps；44- elastic membranes；50- buffer gears；51- pistons；The ducts 511-；52- springs；53- piston rods；60- air inlets
Seat；61- air inlet ports；70- blocks circle；80- fluctuates buffer gear；The main sets of 81-；82- determines core；83- cores；84- torsional springs；85-
Second connector；The first connectors of 86-；87- overlapping areas；100- gas exhaust inspecting mechanisms；101- air inlet pipe；102- exhaust pipes；
103- air inlet pipe；200- air pumps；300- control valve groups；301- electromagnetism fixed pressure reducing valves；302- solenoid-operated proportional pressure reducing valves；303-
One electromagnetic switch valve；The second electromagnetic switch valves of 304-；305- third electromagnetic switch valves；40- cufves；500- pressure sensors；
1011- inlet channels；1012- elastic buffering pads；1021- exhaust passages.
Specific implementation mode
To make those skilled in the art be better understood from technical scheme of the present invention, below in conjunction with the accompanying drawings and specific embodiment party
Formula elaborates to the present invention.
The embodiment of the present invention discloses a kind of gas exhaust inspecting mechanism 100, and the gas exhaust inspecting mechanism 100 is for controlling blood pressure survey
Measure the discharge of the gas in the air bag in the cuff 40 in device.Before the gas exhaust inspecting mechanism 100 for introducing the present invention, first it is situated between
The structure of the air bleeding valve to continue in blood pressure measuring device in the prior art for controlling air bags and there are the problem of.
As shown in figure 16, the air inlet 702 of air bleeding valve in the prior art is formed in the end of inlet channel 1011703,
Spool 30701 is by being resisted against to block air inlet 702 on the end face 111 of end, and by moving down so that air inlet
702 open, and after the opening of air inlet 702, the gas in air bag is discharged by the gap between air inlet 702 and spool 30701,
The gap actually decides the passage section for limiting gas flow, due to the direction of motion perpendicular to spool 30701
Not restricted face on direction (or radial direction of spool 30701) so that upper surface and air inlet of the passage section by spool 30
702 end face limits to be formed, and as shown in figure 17, this can make passage section with ratio of distances constant of the spool 30 away from air inlet 702 very
(gradient of the curve of attached drawing 17 embodies ratio) greatly, that is to say, that the distance of the movement very little of spool 30701 leads to through-flow
Section generates larger variation, and the control of the flow of the control to spool 30 and gas in this way is very unfavorable, correspondingly, to controlling gas
It is also unfavorable that bulk wave moves (including pressure oscillation or airflow fluctuation).For example, when spool 30 moves up a distance for some reason, lead to
Flow section, which will appear, significantly to be reduced, and the gas in air bag can be reduced suddenly by the flow of passage section；For another example working as
Spool 30 moves down a distance for some reason, and passage section, which will appear, significantly to be increased, and the gas in air bag passes through logical
The flow of flow section can increase suddenly.The two situations all can make air bleeding valve air bag can not be made uniformly to be vented, and make in other words
The exhaust of air bag occurs larger fluctuation when encountering some cases.
As shown in Fig. 1 to 12, embodiment of the invention discloses that a kind of gas exhaust inspecting mechanism 100, the gas exhaust inspecting mechanism
100 can at least solve the above problem occurred in the prior art, as shown in Figure 1, the gas exhaust inspecting mechanism 100 includes the first cylinder
Body 10, dividing body 40, spool 30.Chamber is formed in first cylinder body 10, dividing body 40 is set in the first cylinder body 10, and will
Chamber in first cylinder body 10 is divided into upper chamber 11 and lower chambers 12, and the upper end of the first cylinder body 10, which has, to be connected to upper chamber 11
The first air inlet 111 and exhaust outlet 112, the lower end of the first cylinder body 10 there is the second air inlet 121, external pressure gas to pass through
Second air inlet 121 enters lower chambers 12.Spool 30 is located at the top of dividing body 40 and opposite with 111 position of the first air inlet,
It is connect by connecting rod 31 with dividing body 40, can be moved up and down with dividing body 40.First air inlet 111 is a counterbore,
Counterbore increases along the orient diameter that moves down of spool 30, and spool 30 is moved up to block the first air inlet 111, downwards in counterbore
Movement is so that the first air inlet 111 is opened.In the present embodiment, counterbore is bellmouth, and the upper end of bellmouth forms end face, when
Spool 30 and end face against when, spool 30 blocks the first air inlet 111；Spool 30 is a cylindric spool 30, and spool 30 passes through
Upper surface and the upper end of bellmouth be formed by end face against and block the first air admission hole；The upper end of first cylinder body 10 forms air inlet
Pipe 101 and exhaust pipe 102；Air inlet pipe 101 is connected to by sebific duct with the air bag in the cuff 40 of blood pressure measuring device, air inlet pipe
Inlet channel 1011 is formed in 101, the counterbore as the first air inlet 111 is formed in the outlet end of inlet channel 1011；Exhaust
Exhaust passage 1021 is formed in pipe 102, the input end of exhaust passage 1021 forms exhaust outlet 112.Preferably, it is arranged in endface
Impact noise is generated when flexible cushion pad 1012 blocks the first air inlet 111 to avoid spool 30 and improves spool 30 blocks the
The sealing effect of one air inlet 111.
The course of work of the gas exhaust inspecting mechanism 100 of above-described embodiment is：As shown in figures 1 and 3, when needs are into air bag
When inflation, such as inflated into air bag using air pump 200, first so that the gas pushing and pressing dividing body 40 being passed through in lower chambers 12,
So that dividing body 40 is moved up with the end face of the upper end of counterbore with movable valve plug 30 against to block the first air inlet 111, so, it is possible
When ensureing to inflate into air bag, the gas being filled in air bag will not be discharged by the first air inlet 111；When air bag needs to be vented
When, as shown in Fig. 5 and Fig. 6, make the journey that the pressure less than the gas in air bag is reduced to by the gas pressure in lower chambers 12
Degree, and spool 30 is made to be displaced downwardly to a certain position, to form the passage section of certain restriction gas flow.In this way, in air bag
Gas is discharged with constant flow rate or with the flow of even variation from air bag, and the first cylinder body 10 is discharged by exhaust outlet 112
Outside.
The present invention gas exhaust inspecting mechanism 100 compared with the prior art in air bleeding valve be advantageous in that：
Control gas flow passage section by spool 30 upper end edge and counterbore the hole wall corresponding to the edge
It limits and forms (region B as shown in FIG. 6, the region are passage section position), therefore, the aperture of setting counterbore can be passed through
The knots modification that the variation degree in direction carrys out 30 unit displacement of adjusting spool to passage section is moved down along spool 30, for example, by setting
The cone shaped countersink of smaller cone angles is set to reduce knots modification of 30 unit displacement of spool to passage section, in this way, when spool 30 is because of certain
A little reasons move up a distance, and passage section is not in significantly to reduce, and the gas in air bag passes through passage section
Flow will not be reduced suddenly；When spool 30 because certain far from moving down a distance, passage section is not in significantly to increase
Greatly, the gas in air bag will not be increased suddenly by the flow of passage section.To enable air bag to be uniformly vented, and reduce row
The degree of fluctuation occurred when gas is (as shown in fig. 7, compared with prior art, the slope of curve of passage section is smaller, illustrates passage section
It is smaller with the ratio of the amount of movement of spool 30).
The present invention by the first air admission hole by being arranged to counterbore shape, so as to reduce 30 amount of movement of spool to passage section
Knots modification so that the gas exhaust inspecting mechanism 100 of the present invention can be such that air bag more stablizes and uniform exhaust.
In a preferred embodiment of the invention, gas exhaust inspecting mechanism 100 further includes buffer gear 50, such as the institutes of Fig. 1 to 8
Show, dividing body 40 includes slip ring 41, the second cylinder body 42, connection strap 43, elastic membrane 44.Slip ring 41 is interior with the first cylinder body 10
Wall can be free to slide along the first cylinder body 10 with merging by sealing ring sealing；Second cylinder body 42 is located at 41 middle part of slip ring；Even
Narrow bars 43 are circumferentially so that the second cylinder body 42 can be servo-actuated with the formation of slip ring 41 between the second cylinder body 42 and slip ring 41
Integral structure；It is surrounded between second cylinder body 42 of the closure of elastic membrane 44, slip ring 41 and adjacent two connection straps 43
Hollow-out part.Buffer gear 50 includes piston rod 53, piston 51, spring 52；Piston rod 53 it is vertical be fixed on the first cylinder body 10
Lower end；Piston 51 is fixed on the upper end of piston rod 53, and in the second cylinder body 42 and can be along 42 free skating of the second cylinder body
It is dynamic, offered on piston 51 axially through the duct 511 for throttling；Spring 52 is set in the second cylinder body 42 and is resisted against
Piston 51.In the present embodiment, the lower end button of the second cylinder body 42 is equipped with end cap 421 to limit piston 51 under the second cylinder body 42
End abjection, and end cap 421 and piston 51 cover between have allow gas by annular air to ensure the chamber of 51 lower section of piston
Room is not closed chamber, and then the limitation for avoiding closed chamber from moving piston 51.
In above-described embodiment, the effect of buffer gear 50 is：
1, air bag is in exhaust process, because of certain reason (for example, unexpected compression bladder of upper arm of measured patient), such as
Shown in Fig. 9, when gas increases the impact to spool 30 suddenly when by the first air inlet 111, this impact passes through spool 30
Spring 52 is passed to, spring 52 can be good at absorbing the impact, in this way, the impact will not be directly passed to dividing body 40, and
Cause dividing body 40 to generate compressing suddenly to the gas in lower chambers 12, makes the gas in lower chambers 12 so as to avoid the impact
Pressure rises suddenly；When spring 52 alleviates impact by deforming, the indoor gas of chamber of the top of piston 51 passes through 511 row of duct
Go out, at this point, duct 511 generates certain damping action to gas, and then coordinates the buffering course so that for impact with spring 52
It is softer.
2, air bag is in exhaust process, because certain undesirable reason makes the pressure in lower chambers 12 reduce or increase suddenly
(reduce and increase suddenly for example, air pump 200 is passed through the gas in lower chambers 12) when big, such as Fig. 9 and Figure 10, spring 52 is for this
The pressure of suddenly change can carry out pressure buffer using the variation of itself so that the change pressure will not be directly passed to spool 30
And spool 30 is caused to generate mobile and change flow section at once and then change the flow of gas at once, to reduce lower chambers
Pressure oscillation in 12 is to 30 displacement of spool and the influence of passage section.In 52 deformation process of spring, the gas in lower chambers 12
Body is entered by duct 511 in the chamber of 51 top of piston, at this point, duct 511 has certain damping action, Jin Eryu to gas
Spring 52 coordinates further such that influence of the lower chambers 12 to spool 30 and passage section is softer.
3, elastic membrane 44 also has certain abirritation to the pressure oscillation of lower chambers 12, as shown in Fig. 8, specifically,
When the pressure in lower chambers 12 increases or reduces suddenly, that is, when generating fluctuation, elastic membrane 44 is accordingly towards 11 direction of upper chamber
Or 12 Direction distortion of lower chambers, and then make the pressure Quick-return in lower chambers 12 to reasonable pressure, to minimize lower chambers
12 pressure oscillation makes spool 30 generate concussion.
In a preferred embodiment of the invention, the lower end of the first cylinder body 10, which blocks, an air inlet seat 60, air inlet seat 60 with
First cylinder body 10 realizes and is tightly connected that air inlet seat 60 offers air inlet port 61 by blocking circle 70, and air inlet port 61 is towards upper
The port of one end of chamber 11, which forms 121 air inlet port 61 of the second air inlet, to be had a plurality of, and the second progress mouth is correspondingly formed more
It is a；The lower end of piston rod 53 is fixed in air inlet seat 60, and multiple second air inlets 121 are arranged in around air inlet seat 60.At this
In embodiment, the lower end of air inlet seat 60 forms air inlet pipe 101, which is connected to extraneous gas organization of supply, for example,
It is connected to air pump 200, forms the inlet end of air inlet port 61 in air inlet pipe 101.
The invention also discloses a kind of blood pressure measuring devices, as shown in Figure 13 to 15, and combine shown in Fig. 1 to 12, blood pressure
Measuring device includes：Cuff 40, air pump 200, above-mentioned gas exhaust inspecting mechanism 100, pressure sensor 500, control valve group 300 with
And controller；Air pump 200 is connected to air bag and with the second air inlet 121 of lower chambers 12 respectively；Air bag and upper chamber 11
First air inlet 111 is connected to.Pressure sensor 500 is used to measure the gas pressure in pouch；Control valve group 300 includes the first electricity
Magnetic switch valve 303, the second electromagnetic switch valve 304, third electromagnetic switch valve 305, electromagnetism fixed pressure reducing valve 301, solenoid-operated proportional subtract
Pressure valve 302, controller.First electromagnetic switch valve 303 is connected between air pump 200 and air bag for control air pump 200 and gas
Break-make between capsule；Electromagnetism fixed pressure reducing valve 301 is connected between the first electromagnetic switch valve 303 and air bag；Solenoid-operated proportional depressurizes
Valve 302 is connected between air pump 200 and the second air inlet 121 of lower chambers 12；Second electromagnetic switch valve 304 is connected to air pump
It is arranged in parallel between 200 and the second air inlet 121 of lower chambers 12 and with solenoid-operated proportional pressure reducing valve 302；Third electromagnetic switch valve
305 connect with solenoid-operated proportional pressure reducing valve 302, and between air pump 200 and solenoid-operated proportional pressure reducing valve 302；Controller is for controlling
Air pump 200 processed and control valve group 300.
The course of work of blood pressure measuring device of the present invention is：
When patient needs to measure blood pressure, cuff 40 is bundled on the upper arm of patient first, as shown in Figure 13, control
Device controls air pump 200 and starts, and controls the first electromagnetic switch valve 303 and the second electromagnetic switch valve 304 opening, controls third electromagnetism
Switch valve 305 is closed, and air pump 200 is airbag aeration, when the pressure in the air bag detected by pressure sensor 500 reaches predetermined
When value, controller, which controls air pump 200, to be stopped being airbag aeration.It is needed after the predetermined value that the gas in air bag maintains a period of time
When making air bags, as shown in figure 14, controller controls the first electromagnetic switch valve 303 and the second electromagnetic switch valve 304 closes
It closes, control third switch valve is opened；Also, pressure that controller detects in real time according to pressure sensor 500 changes electromagnetism
The electric current of electromagnetic coil is to change the outlet pressure of solenoid-operated proportional pressure reducing valve 302 in proportional pressure-reducing valve 302, and then makes lower chambers 12
Interior gas pressure can make spool 30 be maintained at a suitable position, so that the passage section at the first air inlet 111 is protected
Suitable size is held, and then is made by the way that the flow of the gas at the first air inlet 111 is constant or even variation.
It can realize that the reason of air pump 200 is airbag aeration is：As shown in figure 13, controller controls the first electromagnetic switch
Valve 303 and the second electromagnetic switch valve 304 are opened, after control third electromagnetic switch valve 305 is closed, gas caused by air pump 200
Air bag and lower chambers 12 are respectively enterd by two-way.What is be connected to air bag is provided with fixed pressure reducing valve on the way so that passes through gas
The pressure of gas in capsule is less than the pressure by the gas in lower chambers 12, in this way, the gas in lower chambers 12 is more than air bag
In gas (can be by type selecting or adjusting electromagnetism fixed pressure reducing valve 301 make the pressure of the gas in lower chambers 12 be more than gas
Gas pressure in capsule, the sum of power downward caused by the gravity and associated components of spool 30) so that spool 30 can
The first air inlet 111 is blocked, so as to prevent the gas in air bag to be discharged by the first air inlet 111, realizes air pump 200
For airbag aeration.
The reason of capable of realizing air bags, is：Controller controls the first electromagnetic switch valve 303 and the second electromagnetic switch
Valve 304 is closed, and after control third switch valve is opened, and controls air pump 200 not to airbag aeration, controller control passes through electromagnetism ratio
The electric current of the electromagnetic coil of example pressure reducing valve 302 so that gas (is passed through electromagnetism after solenoid-operated proportional pressure reducing valve 302 by changing
The electric current of the electromagnetic coil of proportional pressure-reducing valve 302 is common knowledge come the pressure drop ratio for adjusting air pressure), into lower chambers 12
The pressure of gas reduces, and the degree reduced is：Spool 30 can be made to move down and the first air inlet 111 is made to open, in this way, air bag
Interior gas is discharged by entering upper chamber 11 after the first air inlet 111 by exhaust outlet 112, and air bag is so realized
Exhaust.Preferably, overflow valve is additionally provided at the gas outlet of air pump 200, overflow valve is used to maintain the outlet pressure of air pump 200.
The advantage of blood pressure measuring device disclosed in this invention is：
1, it is provided with electromagnetism fixed pressure reducing valve 301, which makes the pressure of the gas in lower chambers 12 be more than air bag
Pressure, and then spool 30 is enable to block the first air inlet 111, so as to realize that air pump 200 is airbag aeration.
2, it is provided with solenoid-operated proportional pressure reducing valve 302, on the one hand which makes by so that the pressure of lower chambers 12 is reduced
Spool 30 is opened, to make air bag realize exhaust；On the other hand, according to the pressure value of pressure sensor 500 detected in real time
Change the electric current for the electromagnetic coil for being passed through the pressure reducing valve, and then change the position of spool 30, to change pressure drop ratio, Jin Erneng
The pressure in lower chambers 12 is enough adjusted, so as to the position of adjusting spool 30 so that the gas in air bag is with constant flow
Or the flow discharge of even variation.
3, control valve group 300 is all made of solenoid valve control, this improves the response of the control of inflation and exhaust to air bag
Speed.
4, solenoid-operated proportional pressure reducing valve 302 can change pressure drop ratio, that is, the outlet pressure of pressure reducing valve and the ratio of inlet pressure
Value, and then change the pressure in lower chambers 12, realize the quick adjusting to the pressure of the gas in lower chambers 12.
It should be noted that：The predetermined value of the pressure of gas in above-mentioned air bag is set according to medical standard, herein not
It illustrates；So that the time that air bag maintains pressure is set also according to medical standard, does not illustrate again；Air bag is set to be inflated
Purpose with exhaust is pressed to measure systolic pressure and uphold, and is belonged to common knowledge, is not also illustrated herein.
In a preferred embodiment of the invention, as shown in Fig. 5,11,12,13,14, in air bag and gas exhaust inspecting mechanism
Between 100 setting fluctuation buffer gear 80, the fluctuation buffer gear 80 include it is main set 81, be set to it is main set 81 in determine core 82,
It is set in main set 81 and the core 83 coaxial with core 82 is determined, is set to and determines torsional spring 84 between core 82 and core 83, be set to
It is main set 81 close to one end of core 83 the first connector 86 and be set to it is main set 81 close to determine core 82 one end second company
Connector 85；First connector 86 is connect with the air inlet pipe 101 on the first cylinder body 10, and the second connector 85 passes through sebific duct and air bag
Connection.Wherein, determine core 82 and core 83 offer axially through through-hole, torsional spring 84 in a free state, determining core 82
There is the overlapping of part with the through-hole of core 83, so that the gas in air bag enters the first cylinder body 10 by the through-hole of two cores
Upper chamber 11.When core 83 towards 87 increased direction of through-hole overlapping area when rotating, torsional spring 84 twists deformation.
The effect of above-mentioned fluctuation buffer gear is：When the pressure of the gas in air bag does not generate fluctuation, through-hole overlapping
Area 87 keeps a steady state value, and gas enters upper chamber 11 by determining the through-hole of core 82 and core 83, and passes through exhaust outlet 112
Discharge；When the pressure of the air pressure in air bag fluctuates, by the gas of through-hole overlapping area 87 is increased or reduced with
Weaken the pressure oscillation (when the increased fluctuation of pressure occurs in gas, makes core 83 towards overlapping area by the gas of through-hole
87 increased direction rotations, overlapping area 87 increases, so that the air venting in air bag works as gas to weaken fluctuation
When there is the fluctuation that pressure reduces, by the gas of through-hole core 83 is rotated towards the direction that overlapping area 87 reduces, overlapping
Area 87 reduces, so that the gas pressurize in air bag is to weaken fluctuation).
Above-mentioned fluctuation buffer gear can effectively weaken the pressure oscillation of the gas in air bag.Buffer gear is fluctuated to reduce
Influence when weakening pressure oscillation to 30 stability of spool makes the Maximum overlap area 87 of through-hole be less than inlet channel 1011
Cross section.In this way, during weakening pressure oscillation influence of the generated gas flow variation to the stability of spool 30 compared with
It is small.
Above example is only exemplary embodiment of the present invention, is not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (8)
1. a kind of gas exhaust inspecting mechanism, which is characterized in that including：
First cylinder body, is inside formed with chamber；
Dividing body is set in first cylinder body, and the chamber in first cylinder body is divided into upper chamber and lower chambers,
The upper end of first cylinder body has the first air inlet and exhaust outlet that are connected to the upper chamber, under first cylinder body
There is the second air inlet, external pressure gas to enter the lower chambers by second air inlet at end；
Spool is located at the top of body respectively and opposite with first air inlet position, and can be with the dividing body
It moves up and down；Wherein：
First air inlet is a counterbore, and the counterbore increases along the orient diameter that moves down of the spool,
The spool is moved up in the counterbore to block first air inlet, is moved down so that first air inlet
Mouth is opened.
2. according to claim 1 control exhaust gear, which is characterized in that the counterbore be bellmouth, the bellmouth
Upper end forms end face, when the spool and the end face against when, the spool blocks first air inlet.
3. according to claim 1 gas exhaust inspecting mechanism, which is characterized in that
The dividing body includes：
Slip ring, with the inner wall sealing of first cylinder body with merge can be free to slide along first cylinder body；
Second cylinder body is located in the middle part of the slip ring；
Connection strap, circumferentially between second cylinder body and the slip ring；
Elastic membrane blocks the hollow out surrounded between second cylinder body, the slip ring and adjacent two connection straps
Part；
The gas exhaust inspecting mechanism further includes buffer gear；
The buffer gear includes：
Piston rod, the vertical lower end for being fixed on first cylinder body；
Piston, is fixed on the upper end of the piston rod, and in second cylinder body and can along second cylinder body oneself
By sliding, offered on the piston axially through for throttling duct；
Spring is set in second cylinder body and is resisted against the piston.
4. gas exhaust inspecting mechanism according to claim 4, which is characterized in that the lower end of first cylinder body, which blocks, air inlet
Seat, the air inlet seat offer air inlet port, and the port of the air inlet port towards one end of the upper chamber forms described the
Two air inlets.
5. gas exhaust inspecting mechanism according to claim 4, which is characterized in that the air inlet port have it is a plurality of, described the
Two progress mouths are correspondingly formed multiple；Wherein：
The lower end of the piston rod is fixed in the air inlet seat, and multiple second air inlets are arranged in the week of the air inlet seat
It encloses.
6. a kind of blood pressure measuring device, which is characterized in that including：
Air bag is arranged inside in cuff；
Gas exhaust inspecting mechanism as described in any one of claim 1 to 5；
Air pump；Wherein：
The air pump is connected to the air bag and with the second air inlet of the lower chambers respectively；
The air bag is connected to the first air inlet of the upper chamber.
7. blood pressure measuring device according to claim 6, which is characterized in that the blood pressure measuring device further includes that pressure passes
Sensor, control valve group and controller；
The pressure sensor is used to measure the gas pressure in the pouch；
The control valve group includes
First electromagnetic switch valve is connected between the air pump and the air bag for controlling the air pump and the air bag
Between break-make；
Electromagnetism fixed pressure reducing valve is connected between first electromagnetic switch valve and the air bag；
Solenoid-operated proportional pressure reducing valve is connected between the air pump and the second air inlet of the lower chambers；
Second electromagnetic switch valve, be connected between the air pump and the second air inlet of the lower chambers and with the electromagnetism ratio
Example pressure reducing valve is arranged in parallel；
Third electromagnetic switch valve is connected with the solenoid-operated proportional pressure reducing valve, and is subtracted with the solenoid-operated proportional positioned at the air pump
Between pressure valve；
Controller is configured to：
It when needing to the airbag aeration, controls the air pump and starts, and control first electromagnetic switch valve and the second electricity
Magnetic switch valve is opened, and is controlled the third electromagnetic switch valve and is closed；
It needs to make after the pressure in the air bag detected by the pressure sensor reaches predetermined value and maintains the predetermined time
When the air bags, the controller controls first electromagnetic switch valve and the second electromagnetic switch valve is closed, described in control
Third switch valve is opened；Also, the pressure that the controller detects in real time according to the pressure sensor changes the electricity
The electric current of electromagnetic coil is to change the outlet pressure of the solenoid-operated proportional pressure reducing valve in magnetic proportional pressure-reducing valve.
8. blood pressure measuring device according to claim 7, which is characterized in that be additionally provided at the gas outlet of the air pump excessive
Valve is flowed, the overflow valve is used to maintain the outlet pressure of the air pump.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810352724.0A CN108378836B (en) | 2018-04-19 | 2018-04-19 | Exhaust control mechanism and blood pressure measuring device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810352724.0A CN108378836B (en) | 2018-04-19 | 2018-04-19 | Exhaust control mechanism and blood pressure measuring device |
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| CN108378836A true CN108378836A (en) | 2018-08-10 |
| CN108378836B CN108378836B (en) | 2021-04-27 |
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| CN201810352724.0A Expired - Fee Related CN108378836B (en) | 2018-04-19 | 2018-04-19 | Exhaust control mechanism and blood pressure measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022016739A1 (en) * | 2020-07-22 | 2022-01-27 | 歌尔股份有限公司 | Blood pressure measuring device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024077254A1 (en) * | 2022-10-07 | 2024-04-11 | Edwards Lifesciences Corporation | Systems and methods for responsive damping of pressure |
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| CN107763274A (en) * | 2016-08-17 | 2018-03-06 | 刘海峰 | A kind of decompression main valve for improving outlet pressure degree of regulation |
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| DE3818923C1 (en) * | 1988-06-02 | 1989-03-30 | Rossdeutscher, Wolfram, Dipl.-Ing., 1000 Berlin, De | Manually triggerable, pneumatic-electric switching device |
| CN103476332A (en) * | 2011-04-11 | 2013-12-25 | 欧姆龙健康医疗事业株式会社 | Flow control valve and blood pressure information measurement apparatus provided with same |
| KR20140145483A (en) * | 2013-06-13 | 2014-12-23 | 삼성전자주식회사 | Blood pressure measuring apparatus having valve moudle |
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| WO2022016739A1 (en) * | 2020-07-22 | 2022-01-27 | 歌尔股份有限公司 | Blood pressure measuring device |
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| CN108378836B (en) | 2021-04-27 |
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Inventor after: Lv Caixia Inventor after: Liu Yang Inventor before: Liu Yang |
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Effective date of registration: 20210330 Address after: 452370 Xinmi Hospital of traditional Chinese medicine, south section of Ping'an Road, Xinmi City, Zhengzhou City, Henan Province Applicant after: Lv Caixia Address before: 300352 No. 170, Ge Gu street, Jinnan District, Tianjin Applicant before: Liu Yang |
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