CN219846563U

CN219846563U - Electronic sphygmomanometer

Info

Publication number: CN219846563U
Application number: CN202321614974.XU
Authority: CN
Inventors: 王小平; 曹万; 李凡亮; 吴登峰; 施涛
Original assignee: Wuhan Finemems Inc
Current assignee: Wuhan Finemems Inc
Priority date: 2023-03-01
Filing date: 2023-03-01
Publication date: 2023-10-20
Anticipated expiration: 2033-03-01
Also published as: CN219250166U

Abstract

An electronic sphygmomanometer, comprising: the cuff comprises a breathable bag and an air bag sleeved in the breathable bag; a connection hose, one end of which is connected to the air bag; the host comprises an inflator pump and a deflation valve which are all communicated with the other end of the connecting hose; and a pressure sensor for measuring the pressure in the air bag, which is fixed to the air bag. According to the electronic sphygmomanometer, when the pressure sensor is arranged on the cuff, the real pressure in the air bag of the cuff can be directly measured, and compared with the prior art, the electronic sphygmomanometer can avoid pressure distortion caused by factors such as vibration.

Description

Electronic sphygmomanometer

Description of the divisional application

The utility model relates to a split application of Chinese patent application with 2023, 03 and 01, 202320364594.9 and a pressure sensor for an electronic sphygmomanometer.

Technical Field

The utility model relates to the technical field of medical measuring equipment, in particular to an electronic sphygmomanometer.

Background

In the prior art, most of blood pressure measurement is performed by an oscillometric method, the principle is that an inflatable cuff is used for pressing and blocking blood vessels, then slow deflation is performed, a pressure sensor is used for measuring and recording data to obtain a bell-shaped envelope curve of pulse waves, then characteristic points of systolic pressure and diastolic pressure are found by a corresponding algorithm, the pressure of the inflatable cuff at the characteristic points is the corresponding systolic pressure and diastolic pressure, and the pressure corresponding to the highest point of the envelope curve is average pressure. The structure of the sphygmomanometer known by the inventor is shown in figure 1, the sphygmomanometer comprises a cuff, the cuff is connected to an air pressure connector in a main casing cavity through a hose, the air pressure connector is respectively communicated with a pressure sensor, an inflator pump and a deflation valve through a pipe, the CPU inflates the inflator pump into the cuff through a pump driving circuit, the cuff is inflated and wrapped on an arm, the deflation valve starts to deflate through a valve driving circuit after the artery is completely blocked, in the process, a pulse pressure signal obtained by processing an electric signal measured by the pressure sensor through amplification, analog-to-digital conversion and the like is transmitted to the CPU for analysis, and the CPU determines corresponding systolic pressure and diastolic pressure according to the obtained pulse pressure wave.

In the process, as the inflator pump has certain vibration during operation, the pressure measurement is disturbed; on the other hand, because of the remote interval between the pressure sensor and the cuff, the pressure measured by the pressure sensor is different from the pressure in the cuff due to the fluid dynamics condition and the compressibility of the air.

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

Disclosure of Invention

The utility model provides an electronic sphygmomanometer aiming at overcoming the defects of the prior art, so as to solve at least one of the technical problems.

In order to achieve the above purpose, the present utility model provides the following technical solutions: an electronic sphygmomanometer, comprising:

the cuff comprises a breathable bag and an air bag sleeved in the breathable bag;

a connection hose, one end of which is connected to the air bag;

the host comprises an inflator pump and a deflation valve which are all communicated with the other end of the connecting hose;

and a pressure sensor for measuring the pressure in the air bag, which is fixed to the air bag.

Preferably, the breathable bag comprises two breathable cloths connected at the edges, which are rolled up along a transverse axis to form a cavity for receiving the cuff.

Preferably, the outer wall of one side of the breathable bag is connected with the outer wall of the other side of the breathable bag through the sticking buckle to form an annular cavity through which arms of a person to be tested can pass.

Preferably, one or both longitudinal ends of the air bag are correspondingly connected to the air-permeable bag.

Preferably, the other end of the connecting hose is connected to the inflator and the purge valve via an airflow damper.

Preferably, a choke structure for restricting smooth flow of the air flow is provided in the air flow damper.

Preferably, the choke structure comprises at least one "S" bend or at least one right angle bend or a combination thereof.

According to the electronic sphygmomanometer, when the pressure sensor is arranged on the cuff, the real pressure in the air bag of the cuff can be directly measured, and compared with the prior art, the electronic sphygmomanometer can avoid pressure distortion caused by factors such as vibration.

Drawings

FIG. 1 is a schematic diagram of a conventional electronic blood pressure monitor;

FIG. 2 is a block diagram of an electronic blood pressure monitor according to a preferred embodiment of the present utility model;

FIG. 3 is a schematic cross-sectional view of a cuff in accordance with a preferred embodiment of the present utility model;

FIG. 4 is an internal structural diagram of a host according to a preferred embodiment of the present utility model;

FIG. 5 is a block diagram of a pressure sensor according to a preferred embodiment of the present utility model;

FIG. 6 is a block diagram of a pressure sensor according to another preferred embodiment of the present utility model;

in the figure: 100. a host; 101. an upper case; 102. a lower case; 103. a display unit; 104. a button; 105. a ventilation cover; 200. a cuff; 201. a ventilation bag; 202. sealing edges; 203. an air bag; 3. a connecting hose; 300. a pressure sensor; 301. a lower case; 302. an upper case; 303. an inner cavity; 304. a substrate; 305. a circuit board; 306. a channel; 307. a pressure core; 308. a surrounding frame; 309. a protective material; 310. ventilation holes; 311. a waterproof breathable film; 313. an electronic component; 314. a hole; 315. a contact pin; 316. a thick part; 317. a holding base; 318. an elastic electrical connection; 319. a fish eye contact pin; 320. glue; 325. a contact pin; 401. an air flow buffer; 402. a tube; 403. an inflator pump; 404. a control circuit board; 405. and a bleed valve.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. The following examples are illustrative only and are not to be construed as limiting the utility model. In the following description, the same reference numerals are used to designate the same or equivalent elements, and duplicate descriptions are omitted.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, or the directions or positional relationships in which the product of the present utility model is conventionally put in use, or the directions or positional relationships in which those skilled in the art conventionally understand are merely for convenience of describing the present utility model and for simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present utility model.

In addition, the terms "mounted," "connected," "coupled," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood as appropriate by those of ordinary skill in the art.

It should be further understood that the term "and/or" as used in the present description and the corresponding claims refers to any and all possible combinations of one or more of the listed items.

Referring to fig. 2, in an embodiment of the present utility model, the electronic blood pressure monitor includes a cuff 200, a connection hose 3 and a host 100. The structure of the cuff 200 is shown in fig. 3, and the cuff comprises a breathable bag 201 and a bag 203 sleeved in the breathable bag 201, wherein the breathable bag 201 is connected at edges by two breathable cloths through a sealed edge 202, so that a flat cavity which can be rolled along a transverse axis and is used for accommodating the cuff 200 is formed. One or both longitudinal ends of the air bag 203 may be correspondingly connected to the air-permeable bag 201. The outer wall of one side of the air permeable bag 201 is provided with the sticking buckle, so that the air permeable bag 201 is stuck on the outer wall of the other side of the air permeable bag 201 through the sticking buckle, and an annular cavity through which an arm of a person to be tested can pass is formed. The air bag 203 is connected to the air outlet end of the inflator 403 provided in the main body 100 through the connection hose 3, and when the inflator 403 inflates into the air bag 203, the air bag 203 is inflated to press the arm toward the annular chamber side. The air bag 203 is provided with a pressure sensor 300 for measuring the pressure in the air bag 203, and the pressure sensor 300 may be a known pressure sensor 300 for measuring the air pressure, such as a capacitive, resistive or other type of pressure sensor. In other alternative embodiments, the pressure sensor 300 may also be disposed at the end or proximal portion of the connection hose 3 near one end of the cuff 200.

The main unit 100 includes a housing composed of an upper case 101 and a lower case 102, and a display unit 103 and buttons 104 are provided on the upper case 101. The lateral part of the shell is also provided with a ventilation cover 105, the air inlet end of the inflator 403 is communicated with the inner cavity of the host 100, and the ventilation cover 105 is provided with ventilation holes for communicating the inner cavity of the host 100 with the atmosphere.

Fig. 4 shows a schematic view of the arrangement of elements of the internal cavity of an electronic sphygmomanometer. Wherein, a supporting structure for supporting the inflator 403 and the tube 402 is arranged on the inner wall of the lower shell 102. One end of the connection hose 3 is connected to the pipe 402 through the housing of the main unit 100. Tube 402 communicates with the outlet end of inflator 403 and communicates with and is secured to a deflate valve 405. A control circuit board 404 is arranged above the inflator 403, the deflating valve 405 and the tube 402, and the control circuit board 404 is connected with the display unit 103 and the button 104. The control circuit board 404 is provided with a valve driving circuit for driving the air release valve 405, an inflator driving circuit for driving the inflator 403, and a signal processing circuit for processing the signal measured by the pressure sensor 300.

In other embodiments, the electronic sphygmomanometer preferably further comprises an air flow damper 401 for damping the air flow fed from the inflator 403 into the air bag 203, wherein the air flow damper 401 may damp the air flow by the volume of its inner cavity, or, preferably, a choke structure for restricting the smooth flow of the air flow, such as a curved air passage, more specifically, at least one "S" curve or a right angle curve, or a combination thereof, is provided in the air flow damper 401.

Referring to fig. 5, a specific structure of a pressure sensor 300 of a preferred embodiment is shown. The pressure sensor 300 includes a flat case formed by fastening and fixing the lower case 301 and the upper case 302, and the size of the case in the direction perpendicular to the fastening direction is 2 to 4 times the size in the fastening direction, so that the case can be more suitably attached to the cuff 200. The housing is fixedly connected to the air bag 203, for example, the lower housing 301 and the upper housing 302 can clamp the edge of an opening formed on the air bag 203, and the edges can be bonded by glue 320, or the edges can be bonded and sealed. Wherein the lower case 301 may be flat plate-shaped.

A substrate 304 and a circuit board 305, which are disposed in this order from the inside to the inside of the lower case 301, are fixed to the inner chamber 303 of the case of the pressure sensor 300. The circuit board 305 is provided with an electronic component 313. A pressure core 307 is fixed to the inner side of the base plate 304, and a first sensing surface of the pressure core 307 is communicated to the air bag 203 through a passage 306 provided in the base plate 304 and the lower case 301. The second sensing surface on the other side of the pressure core 307 is connected to the atmosphere, and the air vent 310 may be formed on the upper case 302, and the air vent 310 may be covered with a waterproof and breathable film 311 to prevent the passage of open water while introducing atmospheric pressure into the inner cavity 303. The circuit board 305 may have a surrounding frame 308 fixed on the inner side, and the surrounding frame 308 is rotatably disposed around the pressure core 307, and is filled with a soft protective material 309, such as fluorosilicone gel, so as to protect the pressure core 307 while conducting atmospheric pressure. The pressure core 307 may be a MEMS core, which includes a silicon membrane deformed under a pressure difference between two sides, and one side of the silicon membrane is provided with a measurement circuit (for example, a wheatstone bridge) composed of strain resistors, and two sides of the silicon membrane sense the pressure in the inner cavity 303 and the pressure in the channel 306, respectively. The circuit board 305 draws signals from the measurement circuit through a plurality of pins 325. The circuit board 305 may be provided with a window for exposing the pressure core 307 toward a side far from the lower case 301.

Preferably, the substrate 304 is a ceramic plate, which is capable of having a coefficient of thermal expansion that is closer to that of a silicon film. The lower shell 301 and the base plate 304 may be fixedly connected through a fisheye pin 319, specifically, one end of the fisheye pin 319 is embedded and fixed in the lower shell 301, and the other end of the fisheye pin 319 is matched with the fixed base plate 304 to form a communication hole.

Referring to fig. 5, in another preferred embodiment, a connection structure for facilitating the extraction of measurement signals is provided, which includes a plurality of pins 315 for electrical connection, one end of each pin 315 is inserted into the inner side of the upper case 302 through a hole 314 formed in the upper case 302 and is abutted downward against an elastic electrical connector 318, and the other end of the elastic electrical connector 318 is abutted against a bonding pad formed on the circuit board 305.

One end of the elastic electrical connector 318 (e.g. a metal spring sheet) is welded to a pad of the circuit board 305, or the plurality of elastic electrical connectors 318 prevent the elastic electrical connector 318 from being separated from the circuit board 305 through a retaining seat 317, at this time, the elastic electrical connector 318 may be a conical spring with two ends forming a conical portion, the conical spring penetrates through a retaining hole of the retaining seat 317, and a conical compression surface for compressing the outer side surface of the conical portion toward one side of the circuit board 305 is formed on an inner wall of the retaining hole. Preferably, one end of the pin 315 facing the elastic electrical connector 318 is enlarged to form a thick portion 316, and a positioning recess into which a corresponding end of the elastic electrical connector 318 extends may be provided on an end surface of the thick portion 316.

The scope of the present disclosure is defined not by the detailed description but by the claims and their equivalents, and all modifications within the scope of the claims and their equivalents are to be construed as being included in the present disclosure.

Claims

1. An electronic blood pressure monitor, comprising:

a cuff (200) comprising a breathable bag (201) and a bag (203) sleeved in the breathable bag (201);

a connection hose (3) one end of which is connected to the air bag (203);

the host machine (100) comprises an inflator pump (403) and a deflating valve (405) which are all communicated with the other end of the connecting hose (3);

and a pressure sensor (300) for measuring the pressure in the air bag (203), which is fixed to the air bag (203).

2. The electronic sphygmomanometer of claim 1, wherein the air-permeable pouch (201) comprises two air-permeable cloths connected at edges, which are rolled up along a transverse axis to form a cavity for receiving the cuff (200).

3. The electronic sphygmomanometer according to claim 2, wherein the outer wall of one side of the air-permeable bag (201) is connected with the outer wall of the other side of the air-permeable bag (201) through a sticking button to form an annular cavity through which an arm of a person to be measured can pass.

4. Electronic blood pressure meter according to claim 1, characterized in that one or both longitudinal ends of the air bag (203) are correspondingly connected to the air-permeable bag (201).

5. Electronic sphygmomanometer according to claim 1, characterized in that the other end of the connecting hose (3) is connected to the inflator (403) and the deflate valve (405) via an airflow buffer (401).

6. The electronic sphygmomanometer of claim 1, wherein a choke structure for restricting a smooth flow of the air flow is provided in the air flow buffer (401).

7. The electronic sphygmomanometer of claim 6, wherein the choke structure comprises at least one "S" bend or at least one right angle bend, or a combination thereof.