Electronic sphygmomanometer

Abstract

This utility model relates to the field of medical device technology, specifically to an electronic blood pressure monitor, including a housing, an air pump, an air tube, and a vent valve. A mounting hole is provided at the bottom outer side of the housing. The air pump is located inside the housing. One end of the air tube is connected to the air pump, and the other end forms an interface for external air supply, allowing the electronic blood pressure monitor to be pressurized by inflating. The vent valve is located on the air tube and includes capillary air holes. A fixture through-hole is formed in the mounting hole along the vertical direction, penetrating the housing. The vent valve is positioned opposite any fixture through-hole, allowing for diastolic pressure measurement by releasing air through the fixture through-hole. When air tightness testing of the electronic blood pressure monitor is required, the monitor can be directly placed on an air tightness testing device, and the vent valve can be sealed by cooperating with a portion of the device's structure. This simplifies the air tightness testing process and avoids the impact of incomplete sealing of the vent valve on the accuracy and precision of the air tightness test.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to an electronic blood pressure monitor. Background Technology

[0002] An electronic blood pressure monitor is a medical device that uses electronic technology to measure blood pressure. Its advent has greatly improved the convenience and accuracy of home blood pressure monitoring and blood pressure monitoring in medical settings. Before leaving the factory, electronic blood pressure monitors undergo an airtightness test to ensure the stability of the device and the accuracy of its measurements.

[0003] Existing electronic blood pressure monitors can achieve air tightness testing by automatically closing the air passage using a linear valve. However, the manufacturing requirements and costs of linear valves and control circuits are relatively high. Using a lower-cost ordinary solenoid valve requires sealing the vent valve inside the blood pressure monitor casing before air tightness testing, making the production line operation more complex. For example, the casing needs to be opened to use a fixture to seal the vent valve; however, opening the casing can loosen internal parts, affecting normal operation and making air tightness testing difficult. Utility Model Content

[0004] This invention was made to solve the above-mentioned technical problems, and its purpose is to provide an electronic blood pressure monitor that can conveniently and accurately perform airtightness testing.

[0005] To achieve the above objectives, this utility model provides an electronic blood pressure monitor, comprising: a housing, the housing wall having a fixture through-hole extending through the housing; an air pump located inside the housing; an air tube, one end connected to the air pump, the other end having an interface for supplying air to the outside; and a vent valve disposed on the air tube, including capillary pores opposite to the fixture through-hole.

[0006] Preferably, the outer bottom of the housing is provided with a mounting hole for accommodating the foot pad, and the fixture through hole is located in the mounting hole.

[0007] Preferably, it also includes a sensor connected to the trachea.

[0008] Preferably, it also includes a solenoid valve connected to the air pipe.

[0009] Preferably, it further includes an air tube adapter connected to the air tube; the air tube includes a first branch tube, a second branch tube and a third branch tube, the first branch tube is connected to the air pump, the second branch tube is connected to the sensor, and the third branch tube is connected to the solenoid valve; the vent valve is disposed on the first branch tube.

[0010] Preferably, it also includes a control circuit board for mounting the solenoid valve and the sensor.

[0011] Preferably, the housing also includes a display screen, which is electrically connected to the control circuit board.

[0012] Preferably, an air tube adapter is connected to the air tube; the air tube includes a first branch tube, a second branch tube, and a third branch tube, the first branch tube is connected to the air pump, the second branch tube is connected to the sensor, and the third branch tube is connected to the solenoid valve; the vent valve is provided on the first branch tube.

[0013] Preferably, the vent valve is a soft rubber vent valve or a hard rubber vent valve.

[0014] Preferably, it also includes a cuff with a connecting tube connected to the interface.

[0015] Based on the above description and practical application, the electronic blood pressure monitor of this invention includes a housing, an air pump, an air tube, and a vent valve. A mounting hole is provided at the bottom outer side of the housing. The air pump is located inside the housing. One end of the air tube is connected to the air pump, and the other end forms an interface for external air supply, allowing the electronic blood pressure monitor to be pressurized by inflating the air to complete blood pressure measurement. The vent valve is located on the air tube and includes capillary air holes, ensuring constant communication with the outside environment during use. A fixture through-hole is formed in the mounting hole along the vertical direction, penetrating the housing. The vent valve is positioned opposite any fixture through-hole, allowing for diastolic pressure measurement by venting air through the fixture through-hole. Furthermore, since the vent valve is connected to the bottom of the housing, when the air tightness of the electronic blood pressure monitor needs to be tested, the monitor can be placed directly on the air tightness testing device and cooperate with part of the device's structure to seal the vent valve. This simplifies the air tightness testing process and avoids the time wasted by separately sealing the vent valve during the test, or the impact on the accuracy and precision of the air tightness test caused by an incomplete seal. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the airtightness testing device for a blood pressure monitor according to one embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the airtightness detection device of a blood pressure monitor according to another embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the internal structure of an electronic blood pressure monitor in one embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the bottom structure of an electronic blood pressure monitor in one embodiment of the present invention.

[0020] Figure 5 This is a partial cross-sectional view of the vent valve of an electronic blood pressure monitor in one embodiment of the present invention.

[0021] Figure 6 This is a cross-sectional view of an airtightness testing device for a blood pressure monitor in one embodiment of the present invention.

[0022] Figure 7 This is a cross-sectional view of a blood pressure monitor airtightness detection device in another embodiment of the present invention.

[0023] Figure 8 This is a flowchart of a method for testing the air tightness of a blood pressure monitor in one embodiment of the present invention.

[0024] Figure 9 This is a flowchart of a method for testing the air tightness of a blood pressure monitor in another embodiment of the present invention. Detailed Implementation

[0025] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0026] Furthermore, the accompanying drawings are merely illustrative diagrams of this utility model and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. It should be noted that in this utility model disclosure, the terms "comprising," "configured with," and "set in" are used to indicate an open-ended inclusion, meaning that additional elements / components / etc. may exist besides those listed; the terms "first," "second," etc., are used only as labels and are not intended to limit the number or order of objects; the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] An electronic blood pressure monitor is a medical device that uses electronic technology to measure blood pressure. Its emergence has greatly improved the convenience and accuracy of home blood pressure monitoring and blood pressure monitoring in medical settings. Existing electronic blood pressure monitors use a linear valve and conventional circuitry to control the deflation rate, thereby controlling the overall pressure changes in the monitor. However, the manufacturing requirements and costs of linear valves and control circuits are relatively high. Using a low-cost, ordinary solenoid valve, however, makes it difficult to control a stable deflation rate when performing airtightness testing.

[0029] Therefore, this utility model discloses an electronic blood pressure monitor 10, please refer to it. Figures 1 to 9 The electronic blood pressure monitor 10 includes a housing 4, an air pump 5, an air tube 6, a solenoid valve 43, and a vent valve 7. The housing 4 has a foot pad 41 at its bottom outer side, and a fixture through-hole 42 opposite to the limiting groove 12 formed on its side wall. The foot pad 41 provides cushioning for the entire electronic blood pressure monitor 10; furthermore, when the fixture through-hole 42 is not needed, the foot pad 41 covers it, preventing external dust from entering the electronic blood pressure monitor 10 and affecting other components. The air pump 5 is located inside the housing 4. One end of the air tube 6 is connected to the air pump 5, and the other end forms an interface 61 for external air supply. The electronic blood pressure monitor also includes a cuff (not shown), which includes a connecting tube (not shown) connected to the interface 61, allowing for inflation and blood pressure measurement using the electronic blood pressure monitor 10. The solenoid valve 43 is connected to the air tube 6 and controls the gas flow rate within the entire electronic blood pressure monitor 10. The vent valve 7 is located on the endotracheal tube 6, opposite to the fixture through-hole 42. After the systolic pressure is measured, the vent valve 7 opens to gradually decrease the pressure inside the cuff, allowing observation of the blood pressure decrease and accurate measurement of the diastolic pressure. Furthermore, the vent valve 7 includes a capillary vent 71, which is opposite to the fixture through-hole 42. During airtightness testing of the electronic blood pressure monitor 10, the capillary vent 71 needs to be sealed to achieve a complete airtight seal in the air passage. When the electronic blood pressure monitor 10 is in normal use, the capillary vent 71 allows for normal airflow and works in conjunction with the solenoid valve 43 to measure both diastolic and systolic pressure.

[0030] In some embodiments, the outer bottom of the housing 4 is provided with a mounting hole 45 for accommodating the foot pad 41, and the fixture through hole 42 is disposed opposite to the foot pad 41. That is, the fixture through hole 42 is disposed in the mounting hole 45, and the outlet of the vent valve 7 is installed at the mounting hole 45 of the foot pad 41. The fixture through hole 42 is blocked by the foot pad 41. Without changing the overall structure and rigidity of the electronic blood pressure monitor 10, the fixture through hole 42 is blocked by installing the foot pad 41 in the mounting hole 45. This prevents the gas in the trachea 6 from leaking through the capillary vent 71 on the vent valve 7 and the fixture through hole 42 when the electronic blood pressure monitor 10 is working, thereby affecting the accuracy of the systolic and diastolic blood pressure measured by the electronic blood pressure monitor 10.

[0031] In some embodiments, the blood pressure monitor further includes a sensor 44 connected to the trachea 6. The sensor 44 in the electronic blood pressure monitor 10 converts pressure changes within the cuff into electrical signals, ensuring the accuracy of blood pressure measurement. On one hand, it can detect the pressure rise within the cuff when the air pump 5 inflates, converting these physical changes into electrical signals and transmitting them to the electronic blood pressure monitor 10 for analysis. On the other hand, the sensor 44 can respond quickly to instantaneous changes in blood pressure, and its high precision further ensures the accuracy of the measurement results, thereby guaranteeing long-term reliability. Furthermore, the sensor 44 can adapt to different pressure ranges and is compatible with other electronic components of the electronic blood pressure monitor 10, working together to automatically measure and display blood pressure.

[0032] In some embodiments, the electronic blood pressure monitor 10 further includes a tracheal adapter 8 connected to the tracheal tube 6, used to transport the gas pressurized by the air pump 5 to the solenoid valve 43 and the sensor 44, so as to realize other identification and adjustment of the electronic blood pressure monitor 10. The tracheal tube 6 includes a first bronchus 62, a second bronchus 63, and a third bronchus 64. The first bronchus 62 is connected to the air pump 5, the second bronchus 63 is connected to the sensor 44, and the third bronchus 64 is connected to the solenoid valve 43. The gas from the air pump 5 is transmitted to the sensor 44 and the solenoid valve 43 respectively through the tracheal adapter 6. A vent valve 7 is provided on the first bronchus 62. After the electronic blood pressure monitor 10 completes the systolic pressure measurement, the gas in the tracheal tube 6 is discharged through the vent valve 7 to reduce the air pressure in the tracheal tube 6. The vent valve 7 is located on the side close to the air pump 5, which can discharge the gas from the electronic blood pressure monitor 10 more quickly, so as to achieve rapid venting and measurement of diastolic pressure.

[0033] Furthermore, in some embodiments, the electronic blood pressure monitor also includes a control circuit board 46 for mounting and supporting the solenoid valve 43 and the sensor 44, processing the data acquired by the sensor 44, and controlling the opening and closing of the solenoid valve 43 according to the data transmitted by the sensor 44 to control the normal operation of the entire electronic blood pressure monitor.

[0034] Understandably, in order to ensure that users can easily read the measured blood pressure data for subsequent judgment when using the electronic blood pressure monitor 10, in some embodiments, the housing 4 also includes a display screen 13. The display screen 13 is electrically connected to the control circuit board 46 and displays the values ​​processed by the control circuit board 46 on the display screen 13, thus ensuring the convenience of the electronic blood pressure monitor 10.

[0035] This utility model discloses an airtightness testing device for a blood pressure monitor, applicable to the aforementioned electronic blood pressure monitor 10. The device includes a base 1, a cylinder 2, and an auxiliary fixture 3. The base 1 has a receiving groove 11 formed within it, capable of accommodating at least the bottom area of ​​the blood pressure monitor to be tested. The receiving groove 11 has several limiting grooves 12 formed within it, corresponding to the foot pads 41 of the blood pressure monitor to be tested. These grooves are used to accommodate the electronic blood pressure monitor 10 and ensure stable fixation between the monitor 10 and the base 1, preventing errors in airtightness testing due to unstable installation of the monitor 10 on the base 1, thus affecting the manufacturing quality of the electronic blood pressure monitor 10. The cylinder 2 has an air supply pipe 20 connected to the electronic blood pressure monitor 10 to be tested, used to inflate the monitor 10 and provide the environmental conditions for airtightness testing. The auxiliary fixture 3 is detachably disposed in the receiving groove 11 and has a plug 31 that can block the vent valve 7 of the blood pressure monitor to be tested. This allows the small vent valve 7 to be blocked when the electronic blood pressure monitor 10 to be tested is being tested for air tightness, thus ensuring the effectiveness and accuracy of the air tightness test.

[0036] To ensure the air passage of the electronic blood pressure monitor 10 remains sealed during airtightness testing, in some embodiments, the shape of the receiving groove 11 is identical to at least the bottom region of the casing of the electronic blood pressure monitor 10 under test, serving to house and fix the electronic blood pressure monitor 10 in the base 1. The shapes of each limiting groove 12 are identical to the foot pads 41 of the electronic blood pressure monitor 10 under test, further ensuring that the electronic blood pressure monitor 10 is stably fixed to the base 1 during airtightness testing, thereby guaranteeing the testing accuracy of the airtightness testing device. An auxiliary fixture 3 is disposed in a limiting groove 12, corresponding to the fixture through-hole 42 on the electronic blood pressure monitor 10, and sealing the vent valve 7, ensuring the airtightness of the electronic blood pressure monitor 10's own air passage during airtightness testing, thus providing the basic conditions for achieving airtightness testing of the electronic blood pressure monitor 20.

[0037] Since the vent valve 7 of the electronic blood pressure monitor 10 may be a hard rubber vent valve 7 or a soft rubber vent valve 7, the material of the plug 31 used to seal it is also different in order to ensure its sealing effect. In some embodiments, the plug 31 is a silicone plug 31 or a steel needle. Specifically, when the vent valve 7 is a hard rubber vent valve 7, the plug 31 is a silicone plug 31, and when the vent valve 7 is a soft rubber vent valve 7, the plug 31 is a steel needle. By combining soft and hard materials, the vent valve 7 is sealed.

[0038] This utility model discloses a method for testing the airtightness of a blood pressure monitor, which uses the aforementioned airtightness testing device and includes the following steps:

[0039] Step S1: Adjust the blood pressure monitor to the first test mode and obtain the first time interval when the blood pressure monitor is pressurized to the first preset pressure.

[0040] In some application scenarios, the first test mode is to measure the deflation rate of the deflation valve 7. Since the deflation valve 7 has capillary pores 71, the electronic blood pressure monitor 10 is in a deflation state during both inflation and deflation. To ensure the accuracy of subsequent airtightness testing, it is necessary to ensure that the deflation rate of the deflation valve 7 is normal under both high and low pressure conditions. This avoids large differences in the deflation rate of the deflation valve 7 due to air pressure variations, which could affect the accuracy of the airtightness test. The first preset pressure range is 220 mmHg to 240 mmHg, preferably 230 mmHg. A cylinder 2 with a displacement of 200 ml is used and connected to the blood pressure monitor under test via an air supply tube 20. The cylinder 2 inflates and pressurizes the blood pressure monitor to 230 mmHg, and the first time interval required for pressurization is recorded.

[0041] Step S2: In response to the first time interval being within the first preset range, the blood pressure monitor to be measured decreases to the second preset pressure and acquires the second time interval.

[0042] In some application scenarios, when the time it takes for cylinder 2 to pressurize the blood pressure monitor to reach 230 mmHg is within the first preset range, cylinder 2 stops working, the blood pressure monitor depressurizes, and the second time interval of the pressure drop to the second preset pressure is recorded. The range of the second preset pressure is 30 mmHg to 50 mmHg, preferably 40 mmHg. That is, by recording the second time interval of the blood pressure monitor dropping from 230 mmHg to 40 mmHg, together with the first time interval, the depressurization rate of the depressurization valve 7 is determined.

[0043] Specifically, in some application scenarios, the first preset range is 3-8s. That is, when the time it takes for the cylinder 2 to pressurize the blood pressure monitor to reach 230mmHg is within 3-8s, the air release valve 7 is qualified in the pressurized state.

[0044] If the first time interval is not within the first preset range, there may be a hidden danger in the air circuit design or the vent valve 7 of the blood pressure monitor to be tested, and it needs to be reworked and inspected.

[0045] Step S3: In response to the second time interval being within the second preset range, install the blood pressure monitor to be measured on the base.

[0046] Specifically, in some application scenarios, the second preset range is 18-28s. That is to say, when the cylinder 2 stops working, the time for the blood pressure in the blood pressure monitor to drop from 230mmHg to 40mmHg is within 18-28s. At this time, the deflation rate of the deflation valve 7 meets the prescribed standard, and the test of the deflation rate of the deflation valve 7 in the blood pressure monitor to be tested is completed.

[0047] Furthermore, since the vent valve 7 of the blood pressure monitor under test has capillary vents 71, the air passage inside the blood pressure monitor under test needs to be sealed before the air tightness test is performed. That is, the blood pressure monitor under test needs to be installed on the base 1, and the auxiliary fixture 3 on the base 1 is inserted into the fixture through hole 42 of the blood pressure monitor under test, and the plug 31 is used to seal the capillary vents 71, so as to complete the sealing of the air passage inside the blood pressure monitor under test.

[0048] Step S4: Adjust the blood pressure monitor to the second test mode and perform an airtightness test on the blood pressure monitor.

[0049] The second test mode is the airtightness test mode. After the air release rate of the vent valve 7 is tested, an airtightness test is required before the blood pressure monitor to be tested leaves the factory to ensure the accuracy of the data when the electronic blood pressure monitor 10 measures blood pressure.

[0050] Understandably, in some application scenarios, adjusting the blood pressure monitor to the second test mode to perform an airtightness test includes:

[0051] Step S41: Adjust the blood pressure monitor to the second test mode.

[0052] The second test mode is the airtightness test mode, which uses a cylinder with a displacement of 100 ml and connects the cylinder 2 to the blood pressure monitor under test through the air supply pipe 20 to perform the airtightness test.

[0053] Step S42: Obtain the air leakage value of the blood pressure monitor under test when it is in high pressure and low pressure states respectively.

[0054] In some application scenarios, cylinder 2 pressurizes the blood pressure monitor to a high-pressure state, and the leakage value of the blood pressure monitor under high-pressure state is observed and measured; cylinder 2 stops working until the blood pressure monitor is depressurized to a low-pressure state, and the leakage value of the blood pressure monitor under low-pressure state is observed and measured.

[0055] Step S43: In response to the leakage value being within the third preset range, complete the air tightness test.

[0056] In some applications, the air leakage value of the blood pressure monitor under test is less than 6 mmHg in both the high-pressure and low-pressure states, indicating that the air tightness test is qualified. If the air leakage value of the blood pressure monitor under test is greater than 6 mmHg in either the high-pressure or low-pressure states, it needs to be returned to the factory for repair and reconnected to cylinder 2 for testing.

[0057] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An electronic blood pressure monitor, characterized in that, include: The shell has a through-hole for a fixture forming the shell wall; An air pump is located inside the housing; The air tube has one end connected to the air pump and the other end forming an interface for supplying air to the outside. A vent valve is provided on the air pipe and includes capillary vents opposite to the through hole of the fixture.

2. The electronic blood pressure monitor as described in claim 1, characterized in that, The outer bottom of the housing is provided with a mounting hole for accommodating the foot pad, and the fixture through hole is located in the mounting hole.

3. The electronic blood pressure monitor as described in claim 1, characterized in that, Also includes: The sensor is connected to the trachea.

4. The electronic blood pressure monitor as described in claim 3, characterized in that, Also includes: A solenoid valve is connected to the air pipe.

5. The electronic blood pressure monitor as described in claim 4, characterized in that, Also includes: An endotracheal adapter is used to connect to the endotracheal tube. The trachea includes a first bronchus, a second bronchus, and a third bronchus. The first bronchus is connected to the air pump, the second bronchus is connected to the sensor, and the third bronchus is connected to the solenoid valve. The vent valve is installed on the first branch pipe.

6. The electronic blood pressure monitor as described in claim 4, characterized in that, Also includes: A control circuit board for mounting the solenoid valve and the sensor.

7. The electronic blood pressure monitor as described in claim 6, characterized in that, The housing also includes a display screen, which is electrically connected to the control circuit board.

8. The electronic blood pressure monitor as described in claim 1, characterized in that, The vent valve is either a soft rubber vent valve or a hard rubber vent valve.

9. The electronic blood pressure monitor as described in claim 1, characterized in that, Also includes: The cuff includes a connecting tube that is connected to the interface.

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