Blood pressure measuring device and pneumatic pressure stabilizing structure thereof

Abstract

The utility model relates to a blood pressure measuring device and a pneumatic pressure stabilizing structure thereof, the device comprises a blood pressure measuring instrument and an arm band, the blood pressure measuring instrument is provided with an insertion port communicated with the pneumatic pressure stabilizing structure, the arm band is provided with an insertion piece communicated with an air bag in the arm band, and the pneumatic pressure stabilizing structure is composed of a non-deformable air chamber and an air pump integrating inflation and deflation. When the arm band is inserted into the inserting opening of the blood pressure measuring instrument through the inserting piece, the pneumatic pressure stabilizing structure is communicated with the air bag in the arm band, and the air pressure of air is kept stable. A pneumatic pressure stabilizing structure is formed by the non-deformable air chamber and the inflation and deflation integrated air pump, so that air is buffered in the air chamber, and a stable air source is formed. In addition, the design of the air chamber is beneficial to improving the measurement precision and stability, the air chamber can stably manage air pressure distribution, and it is ensured that the pressure measurement assembly can accurately read data. Meanwhile, the design reduces the size of the shell, so that the shell is easier to carry and use in daily life, and the convenience and comfort of a user are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to blood pressure measurement technical field especially relates to a blood pressure measurement device and pneumatic pressure stabilizing structure. BACKGROUND

[0002] Traditional blood pressure measurement devices are composed of multiple key components, including air path mechanism, pump, battery valve, deflation valve and arm band. These components are connected together through hoses, forming a complete measurement system. In use, the user first wraps the arm band around the upper arm and ensures that it is at the same level as the heart. After starting the device, the pump starts to inflate the arm band, pressurizing it. The measurement process usually adopts the step-up type, that is, step-by-step pressurization and maintaining stable at each pressure level for a period of time. Subsequently, the arm band is gradually deflated through the deflation valve, and after the measurement process is completed, it is completely deflated and removed. Finally, the measurement result is read through the display screen or other reading device.

[0003] Although traditional blood pressure measurement devices are widely used in clinics and families, they have some significant defects. First, direct pressurization by the pump has a great impact on measurement accuracy, especially in the step-up detection mode, the pump needs to have very high performance and stability to ensure the stability of each pressure level. Second, the complex mechanical structure increases the complexity of the system, making the maintenance and calibration of the device cumbersome. The large size, inconvenience of carrying and daily use are also a problem of traditional blood pressure measurement devices. In addition, the use of battery valve and pump leads to high power consumption of the device, which requires frequent battery replacement or charging. The slow pressure rising and deflation process affects rapid measurement, and the noise and vibration generated during the process may make the user feel uncomfortable.

[0004] Currently, there are some technical problems in the technical field of blood pressure measurement devices. First, the step-up detection requires the pump to pressurize stably and accurately at each pressure level, which requires very high performance of the pump. If the performance of the pump is slightly insufficient, it may lead to unstable air path pressure, affecting the measurement accuracy. Second, maintaining the stability of the air path is the key to ensuring measurement accuracy, which depends on high-quality air path mechanism and valves. Any air path leakage or valve failure will affect the measurement result. In addition, how to design a more integrated and portable blood pressure measurement device while ensuring measurement accuracy is a technical problem.

[0005] There is currently no blood pressure measurement device that eliminates the hose, because the hose in the traditional blood pressure measurement device plays an important role in the entire measurement process, and eliminating the hose will bring a series of technical challenges and problems. The hose is the main connection channel between the cuff and the pressure sensor and the pump, used to transfer air pressure. Through the hose, the pump can inflate the inside of the cuff to generate the necessary pressure to compress the arteries for blood pressure measurement. The presence of the hose ensures the effective transmission of pressure and the stability of the air circuit. If the hose is eliminated, a replacement method needs to be found to ensure equally accurate and stable pressure transmission, which is a quite complex technical problem.

[0006] CN101711122A discloses a blood pressure measurement device that uses a cuff bag to measure blood pressure. The cuff bag is provided with a sub-air bag on the upstream side of the air bag for blocking blood and on the human body side, and a pulse detection air bag on the downstream side. First, the sub-air bag is pressurized, and after injecting a constant volume of air, the valve is closed to make it a closed space. Then the air bag for blocking blood is pressurized and then depressurized, while the pulse detection air bag measures the pulse, thereby preventing the influence of the pulse vibration on the upstream side of the cuff bag from being transmitted to the pulse detection air bag on the downstream side. Although this technical solution has its innovations, it still has some significant defects in actual operation. First, the complex air circuit design and the use of multiple air bags increase the complexity and manufacturing cost of the device. Each air bag and valve needs to be precisely controlled and calibrated, and any failure or inaccuracy of one component can cause errors in the overall measurement result. Second, the multi-step operation in the measurement process can affect the user experience. Pressurization and depressurization of different air bags at different stages not only increases the measurement time, but also can cause difficulties and inconvenience in user operation. In addition, the presence of multiple air bags and valves increases the potential failure points of the air circuit system, increasing the difficulty and cost of maintaining and repairing the device. In addition, since this design relies on isolating pulse vibration to a specific area, it may not completely eliminate external interference in some cases. For example, if the user moves or muscles tense during the measurement process, it can still affect the measurement accuracy of the pulse detection air bag. Although the design tries to avoid this problem by dividing the air bag, the effect of completely isolating the vibration may not be ideal in actual operation. Therefore, such blood pressure measurement devices have not been popularized in the market.

[0007] Therefore, how to eliminate the hose outside the device and ensure the measurement effect of blood pressure without setting up a complex structure and using method is a difficult problem to overcome at present, and is also a technical problem that the utility model hopes to solve.

[0008] In addition, on the one hand, due to the difference in understanding of those skilled in the art; on the other hand, due to the fact that the applicant has studied a large number of literatures and patents when making the utility model, but limited by the size and has not listed all the details and contents in detail, however, this is by no means that the utility model does not have the characteristics of these prior arts, on the contrary, the utility model has all the characteristics of the prior art, and the applicant reserves the right to add relevant prior art in the background art. Summary of the utility model

[0009] The conventional blood pressure measuring instrument has some significant defects. First, the direct pressurization of the pump has a great influence on the measurement accuracy, especially in the pressure boosting detection mode, the pump needs to have very high performance and stability to ensure the stability of each pressure level. Second, the complex mechanical structure increases the complexity of the system, making the maintenance and calibration of the device cumbersome. The large size, inconvenience of carrying and daily use are also a problem of the conventional blood pressure measuring instrument. In addition, the use of battery valve and pump leads to large power consumption of the device, which needs to be frequently replaced or charged. The pressure boosting and air release process is relatively slow, which affects the rapid measurement, and the noise and vibration generated during the process may make the user feel uncomfortable. The hose in the conventional blood pressure measuring device plays an important role in the whole measurement process, and canceling the hose will bring a series of technical challenges and problems.

[0010] Therefore, how to cancel the hose outside the device and ensure the measurement effect of blood pressure, without setting a complex structure and use mode, is a difficult problem to overcome at present, and is also a technical problem that the utility model hopes to solve.

[0011] In view of the deficiencies of the prior art, the utility model provides a blood pressure measuring device from the first aspect, comprising a blood pressure measuring instrument and an arm band, the blood pressure measuring instrument is provided with a socket in communication with a pneumatic pressure stabilizing structure, the arm band is provided with a plug in communication with the air bag in the arm band, the pneumatic pressure stabilizing structure is composed of a non-deformable air chamber and a gas charging and discharging integrated air pump, in the case that the arm band is inserted into the socket of the blood pressure measuring instrument through the plug, the pneumatic pressure stabilizing structure is in communication with the air bag in the arm band and maintains the stable air pressure of the gas.

[0012] The non-deformable air chamber and the gas charging and discharging integrated air pump are used to form the pneumatic pressure stabilizing structure, so that the gas is buffered in the air chamber and forms a stable gas source.

[0013] According to a preferred embodiment, the first end of the air chamber is connected with the socket in a manner allowing gas delivery, and the other end of the air chamber is connected with the air pump and in communication, so that the gas output by the air pump is buffered in the air chamber and the air pressure is maintained stable. In this way, the air chamber provides sufficient space for the gas output by the air pump to be buffered and forms a stable gas source.

[0014] According to a preferred embodiment, the air chamber is provided with a first hole, a second hole and a third hole in different directions, the air chamber is a non-deformable cavity component, the first hole is in communication with the cuff, the second hole is in communication with the interface of the pressure measurement assembly, and the third hole is in communication with the interface of the air pump, so that the gas in the air chamber enters the cuff through the cuff. The air chamber is provided with multiple holes (first hole, second hole and third hole) in different directions, so that the gas can effectively enter and exit the air chamber. In particular, the inlet and outlet directions of the air pump are not in the same direction as the gas flow direction, which can reduce the interference of the air pump on the gas flow and the air pressure at the pressure collection position; this makes the gas flow in the air chamber more stable, especially during the inflation process, which can reduce the unevenness of the gas flow, ensure more accurate pressure transmission to the cuff, and thus improve the accuracy of blood pressure measurement.

[0015] According to a preferred embodiment, the distance between the second hole and the first hole is less than the distance between the third hole and the first hole, so that the pressure measurement assembly collects pressure data near the cuff. The pressure measurement assembly is installed at a position close to the air pressure of the cuff, which can collect pressure data near the cuff. This position optimization makes the measurement result closer to the actual blood pressure value, thereby improving the accuracy and reliability of the measurement and reducing the misreading caused by pressure fluctuations.

[0016] According to a preferred embodiment, the air chamber is a special-shaped structure, and the two ends of the air chamber are respectively provided with limiting hooks for limiting the relative position of the studs in the second shell. The curvature of the limiting hook matches the shape of the stud, and in the state that the air chamber is installed in the second shell, the limiting hooks at the two ends of the air chamber are arranged opposite to each other and in contact with the studs to form a limiting mode, thereby limiting the movement of the air chamber in the short axis direction of the second shell. The limiting hooks at both ends of the air chamber can ensure that the air chamber does not move freely during use. This can reduce the instability caused by the movement of the air chamber, maintain consistency during measurement, and thus improve the overall measurement accuracy.

[0017] According to a preferred embodiment, the first hole, the second hole and the third hole of the air chamber are provided with sealing rings for sealing the interfaces between the first hole and the cuff, the second hole and the pressure measurement assembly, and the third hole and the air pump. The sealing rings on each hole ensure the sealing between the air chamber and the interface. Good sealing can prevent gas leakage and ensure that the pressure in the air chamber is accurately reflected in the measurement results, further improving the measurement accuracy and the stability of the instrument.

[0018] According to a preferred embodiment, the second side of the air chamber is formed with a limiting groove in a way that the air chamber is recessed inward, and there is a passage allowing gas to pass between the limiting groove and the first side of the air chamber, and the second shell is provided with a limiting support at a position matching the limiting groove, and in the state that the air chamber is installed in the second shell, the limiting support is located in the limiting groove, thereby limiting the movement of the air chamber in the long axis direction of the second shell. The recessed design of the air chamber forms the limiting groove, which can effectively limit the movement of the air chamber in combination with the limiting support. This structure limits unnecessary movement of the air chamber during operation, improves the continuity and accuracy of measurement, and ensures that each measurement can be reliably performed.

[0019] According to a preferred embodiment, the first hole is arranged at the first end of the air chamber, the second hole is arranged at the first side of the air chamber and close to the second end, and the third hole is arranged at the third side of the air chamber facing the first shell and close to the first end. Such a structural design makes the gas flow of the air pump less interfere with the collection area of the pressure measurement assembly.

[0020] According to a preferred embodiment, the air chamber is fixed to the inner side of the second shell by ultrasonic welding. This fixing method enhances the overall structural strength of the air chamber, avoids looseness caused by mechanical connection, and ensures stability and measurement consistency during long-term use.

[0021] According to a preferred embodiment, the air chamber is integrally arranged with the second shell, so that the air chamber forms a cavity in the second shell. This design not only simplifies the structure, reduces the number of components and potential failure points, but also improves the air tightness and stability, thereby providing more accurate and consistent results in blood pressure measurement.

[0022] Through the improvement of the above technical features, the performance of the blood pressure measuring instrument is significantly improved, and the significant defects of the traditional blood pressure measuring instrument in terms of measurement accuracy, equipment complexity and portability are solved. At the same time, the structure design and use process are simplified, the user experience is improved, and the needs of modern portable health monitoring are met. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a combined structure schematic diagram of the blood pressure measuring device provided by the utility model;

[0024] Figure 2 is a split structure schematic diagram of the blood pressure measuring device provided by the utility model;

[0025] Figure 3 is a structure schematic diagram of each component inside the blood pressure measuring device provided by the utility model;

[0026] Figure 4is a split structure schematic view of the air chamber in the second shell of the blood pressure measuring device and the second shell provided by the utility model;

[0027] Figure 5 is a split structure schematic view of each component of the second shell of the blood pressure measuring device provided by the utility model;

[0028] Figure 6 is a structure schematic view of the second shell in the installation state of the blood pressure measuring device provided by the utility model;

[0029] Figure 7 is an arterial pressure amplitude size change trend chart in the process of pressure reduction provided by the utility model.

[0030] LIST OF REFERENCE NUMERALS

[0031] 100: blood pressure measuring instrument; 110: first shell; 111: deflation valve; 112: pressure sensor; 113: air pump; 114: power supply; 115: loudspeaker; 116: interface; 117: resistance element; 118: buckle; 119: support; 120: second shell; 121: air chamber; 122: first hole; 123: second hole; 124: third hole; 125: ultrasonic wall; 126: ultrasonic welding line; 127: first stud; 128: second stud; 129: third stud; 130: socket; 140: display assembly; 141: key; 150: light-emitting assembly; 160: circuit board; 170: loudspeaker hole; 180: limiting groove; 181: limiting support; 190: limiting hook; 200: arm band; 210: belt body; 220: plug-in; 300: sealing ring. DETAILED DESCRIPTION

[0032] The following will be described in detail in conjunction with the drawings.

[0033] In the traditional blood pressure measuring instrument 100, although the hose between the arm band 200 and the blood pressure measuring instrument 100 plays an important role in the measurement process, it also has some defects. First, the existence of the hose may cause unstable gas flow, which may affect the accuracy of the pressure reading, especially during the inflation and deflation process. Second, the hose may leak during the connection process, and this leakage not only may cause the loss of gas, but also may affect the reliability of the measurement results. In addition, the material and aging of the hose may also affect its performance, and over time, the hose may have problems due to wear and tear, thereby affecting the stability of the measurement. The maintenance and cleaning of the hose are relatively troublesome, especially in the case of frequent use, dirt may accumulate inside, affecting the hygiene of the equipment and the accuracy of the measurement results. In addition, the connection of the hose may cause the device to increase in size, affecting the convenience of the user's carrying.

[0034] These issues pose challenges to the practical use of traditional blood pressure monitors 100, thus limiting their application flexibility and measurement accuracy. Therefore, how to eliminate the external tubing while maintaining accurate blood pressure measurement, without incorporating complex structures and usage methods, is a current challenge and the technical problem this invention aims to solve.

[0035] To address the shortcomings of existing technologies, this utility model provides a blood pressure measuring device, such as... Figure 1 As shown, the device includes a blood pressure monitor 100 and an arm cuff 200. The blood pressure monitor 100 has a port 130 that communicates with a pneumatic pressure stabilizing structure. The arm cuff 200 has a plug 220 that communicates with an air bladder inside the arm cuff 200. The pneumatic pressure stabilizing structure consists of a non-deformable air chamber 121 and an integrated inflation / deflation pump 113. When the arm cuff 200 is inserted into the port 130 of the blood pressure monitor 100 via the plug 220, the pneumatic pressure stabilizing structure communicates with the air bladder inside the arm cuff 200 and maintains stable gas pressure.

[0036] The pneumatic pressure stabilizing structure can be installed in a mechanical blood pressure monitor 100 or an electronic blood pressure monitor 100.

[0037] like Figure 2 As shown, the blood pressure monitor 100 has a non-deformable air chamber 121. The air chamber 121 is connected to the air pump 113 and the pressure measuring component, respectively. The pressure measuring component collects the pressure data of the air chamber 121.

[0038] When the pneumatic pressure stabilizing structure is applied in the mechanical blood pressure measuring instrument 100, the pressure measuring component can be a mercury column. The mechanical blood pressure measuring instrument 100 maintains the stability of the gas pressure in the arm band 200 through the pneumatic pressure stabilizing structure. In the mechanical blood pressure measuring instrument 100, the air chamber is connected to the tubeless body channel formed by the plug-in 220 and the socket 130, effectively delivering gas to the air bag of the arm band 200 to maintain the stability of the air pressure in the air bag. This process is the key to blood pressure measurement. When the user starts the blood pressure measuring instrument 100, the pressure signal to be measured is detected, and the gas is sent into the arm band 200 to gradually fill the air bag. As the gas pressure increases, the gas in the air bag is compressed, exerting pressure on the arm and temporarily blocking blood flow. During the inflation of the air bag, the compression of the gas is also reflected back to a part called the atmospheric chamber. This reflection process actually achieves a sensitive response to pressure changes through the dynamic behavior of the gas. The design of the air chamber 121 ensures that the gas can effectively transmit the pressure signal during compression and release. As the pressure in the air bag continues to increase, it will eventually exceed the blood pressure, causing blood flow to be completely blocked. When the gas in the air bag gradually releases back to the air chamber 121, the pressure in the air bag decreases, and blood flow begins to flow again. At this time, the pointer accurately indicates the measured blood pressure value on the dial, including systolic pressure (maximum blood pressure) and diastolic pressure (minimum blood pressure). This complete measurement process ensures that the blood pressure measuring instrument 100 can provide stable and accurate readings.

[0039] The invariable air chamber 121 is crucial in the operation of the blood pressure measuring instrument 100. Its design ensures that the shape of the air chamber 121 does not change due to external environmental influences when the pressure changes, thereby improving the accuracy of the measurement. After the pressure signal is sent, the gas in the air chamber 121 is sent into the air bag of the arm band 200, and as the pressure in the air bag gradually increases, the compressed gas is reflected back to the air chamber 121 again, forming a buffering effect. This buffering mechanism can effectively reduce the measured blood pressure value and prevent unstable readings caused by pressure fluctuations, thereby ensuring that the blood pressure measuring instrument 100 can provide consistent and reliable measurement results. Therefore, the design of the mechanical blood pressure measuring instrument 100 ensures the stability and accuracy of blood pressure measurement through precise gas delivery, reflection, and buffering mechanisms, reducing the influence of external pressure changes on the measurement results.

[0040] When the pneumatic pressure stabilizing structure is applied in the electronic blood pressure measuring instrument 100, the pressure measuring component can be a pressure sensor 112.

[0041] Preferably, the plug-in 220 is a small orifice port that communicates with the air bag inside the strap 210 of the cuff 200. The socket 130 is an orifice port that communicates with the air chamber 121. The first end of the air chamber 121 is connected with the socket 130 in a manner that allows gas to be delivered. The other end of the air chamber 121 is connected and communicates with the air pump 113, so that the gas output by the air pump is buffered in the air chamber 121 and maintains a stable air pressure.

[0042] Preferably, in the case where the plug-in 220 is inserted into the socket 130 of the blood pressure measuring instrument 100, there is a sealing ring 300 between the plug-in 220 and the socket 130 and a sealed state is formed to avoid air leakage. The sealing ring 300 is, for example, a rubber ring.

[0043] By replacing the conventional flexible hose with the invariable air chamber 121, the advantages include:

[0044] (1) The volume of the air chamber 121 is large, its storage capacity is large, and the stability of the air pressure output by the air pump 113 to the cuff 200 is improved, which plays a buffering role and has low cost.

[0045] (2) The combination of the air pump 113 and the air chamber 121 can provide a relatively stable air pressure output, improving the stability of the measurement results.

[0046] (3) Through the design of the air chamber 121, an air charging and discharging integrated pump can be used, which reduces the requirements for the pump, reduces the cost, reduces the assembly difficulty, and improves the production efficiency.

[0047] As shown in Figure 2 , the blood pressure measuring instrument 100 includes a first housing 110 and a second housing 120. The first housing 110 and the second housing 120 are assembled in a detachable manner, such as screw connection, or snap connection and combination thereof, to form a complete housing of the blood pressure measuring instrument 100.

[0048] When the pneumatic pressure stabilizing structure is installed in the electronic blood pressure measuring instrument 100, as shown in Figure 2 , it further includes a display assembly 140, a light emitting assembly 150, and a circuit board 160. The display assembly 140 and the light emitting assembly 150 are arranged on the first housing 110, and the circuit board 160, the air chamber 121, the air pump 113, the pressure sensor 112, and the power supply 114 are arranged in the cavity between the first housing 110 and the second housing 120.

[0049] As shown in Figure 2As shown, a button 141 is also provided on the first housing 110. The button 141 is embedded in the first housing 110 and connected to the circuit board 160 in a point contact manner. The display component 140 is connected to the circuit board 160 and the power supply 114 via wires or data cables and is used to display data information on the circuit board 160. The light-emitting component 150 is connected to the circuit board 160 and the power supply 114 via wires or data cables. The light-emitting component 150 is used to provide light so that the information on the display component 140 is visible to the naked eye. The air pump 113 is connected to the circuit board 160 via wires or data cables. The pressure sensor 112 is connected to the circuit board 160 via wires or data cables.

[0050] like Figure 3 As shown, the pressure sensor 112 is disposed on the side of the circuit board 160 that contacts the gas chamber 121, so that the extended interface of the pressure sensor 112 is inserted into the second hole 123 of the gas chamber 121. This arrangement places the pressure sensor 112 at the gas inlet and outlet of the gas chamber 121, detecting the pressure of the gas inside the chamber 121 at this location. This is unaffected by the airflow caused by the gas input from the air pump 113, resulting in more accurate pressure data. Preferably, the pressure sensor 112 is soldered to the side of the circuit board 160 and electrically connected to the circuit board 160.

[0051] The detachable housing design makes the assembly, maintenance, and repair of the blood pressure measuring device 100 easier, allowing users to easily disassemble and replace internal components. The integration of the display component 140 and the light-emitting component 150 provides an intuitive and clear user interface, enhancing the user experience. The optimized layout of the internal cavities improves the relative positions of the components, resulting in a more compact and efficient structure.

[0052] According to a preferred embodiment, the non-deformable air chamber 121 within the second housing 120 is provided with a first hole 122, a second hole 123, and a third hole 124, each with a different orientation. The air chamber 121 is a non-deformable cavity component. The first hole 122 communicates with a connector 130 on the side of the second housing 120. The second hole 123 communicates with an interface of a pressure sensor 112. The third hole 124 communicates with an interface of an air pump 113. Thus, gas within the air chamber 121 is input into the arm belt 200 through the connector 130.

[0053] Clearly, the third hole 124, connected to the air pump 113, is located far from the inlet 130. This causes the direction of gas input or extraction by the air pump 113 to differ from the gas flow direction at the inlet 130, reducing interference from the air pump 113 on the airflow near the inlet 130 within the air chamber 121 and resulting in more accurate data acquisition by the pressure sensor 112. The second hole 123, connected to the pressure sensor 112, faces a different direction than the first hole 121. This allows the pressure sensor 112 to detect a more stable pressure region, further reducing interference from the gas flow at the first hole 121 on the pressure sensor 112's measurement. Furthermore, since there is no flexible tubing at the connector 220, gas pressure interference near the inlet 130 is almost zero and will not affect the final pressure data of the pressure sensor 112.

[0054] According to a preferred embodiment, a first hole 122 is disposed at a first end of the gas chamber 121. A second hole 122 is disposed on a first side of the gas chamber 121 near a second end, and a third hole 124 is disposed on a third side of the gas chamber 121 facing the first housing 110 near a first end. This hole arrangement optimizes the gas flow path, allowing the gas to be distributed more evenly within the gas chamber 121, thereby improving the stability of the gas pressure and the measurement accuracy.

[0055] According to a preferred embodiment, sealing rings 300 are provided on the first hole 122, the second hole 123, and the third hole 124 of the air chamber 121 to seal the interfaces between the air chamber 121 and the socket 130, between the air chamber 121 and the pressure sensor 112, and between the air chamber and the air pump 113. The sealing design of the sealing rings 300 ensures the airtightness of each interface, effectively preventing gas leakage and improving the accuracy of measurement and the safety of the equipment. This sealing method also enhances the durability of the equipment and extends its service life.

[0056] According to a preferred embodiment, the air chamber 121 can be a regular geometric structure or an irregular structure. Figures 2-6 The image shows an irregularly shaped air chamber 121.

[0057] Preferably, such as Figures 2-6 As shown, the second housing 120 contains multiple studs. The studs are used to connect and secure the two housing parts, providing stable support. The studs are also used for tightening screws.

[0058] like Figures 2-6 As shown, the air chamber 121 has limiting hooks 190 at both ends for relative positioning with a plurality of studs inside the second housing 120. Preferably, the limiting hooks 190 are not limited to... Figures 2-6The hook-shaped structure can also be a convex geometric shape (e.g. a convex cuboid), as long as it can be adapted to the contour of the second housing 120 and can limit the position of the stud.

[0059] Preferably, as shown in Figure 2 and Figure 3 The first housing 110 is also provided with at least one buckle 118. The position of the buckle 118 corresponds to the position of the stud, which is used to engage with the hole structure in the stud, so that the first housing 110 and the second housing 120 are connected together. Preferably, the circuit board 160 is provided with a plurality of holes corresponding to the position of the stud or the buckle 118, which facilitates the buckle 118 to pass through the circuit board 160. As shown in Figure 2 One of the structures of the buckle 118 is that the buckle 118 has a structure with elasticity and a protrusion at the end. When the buckle 118 is inserted into the stud after elastic deformation, the end restores the deformation and cannot be directly separated from the hole of the stud, so that the buckle 118 engages with the stud and is difficult to separate, achieving the relative fixation of the first housing 110 and the second housing 120.

[0060] Preferably, as shown in Figure 3 The side of the circuit board 160 close to the speaker 115 is also provided with a plurality of supports, which are used to support the circuit board 160 and avoid deformation of the circuit board 160 in long-term use, thereby prolonging the service life of the circuit board 160. The speaker 115 is connected to the circuit board 160 by a wire and is arranged near the speaker hole 170. The speaker hole 170 is used to allow the sound emitted by the speaker to be transmitted from the inside of the device to the outside, thereby improving the propagation efficiency and clarity of the sound, so that the sound of the speaker 115 is propagated through the speaker hole 170.

[0061] As shown in Figure 4 and Figure 5 The first stud 127 is arranged in the area inside the second housing 120 close to the speaker hole 170. The second stud 128 and the third stud 129 are arranged in the areas of the second housing 120 away from the position of the speaker hole 170, respectively, and the second stud 128 and the third stud 129 are close to different and longer sides of the second housing 120, respectively, for limiting the position of the limiting hook 190. For example, as shown in Figure 3 The two limiting hooks 190 are approximately symmetrically horn-shaped.

[0062] As shown in Figure 4 and Figure 5 The limiting hook 190 is part of the air chamber 121 and is arranged at the two ends of the second side of the air chamber 121. Preferably, the bending directions of the two limiting hooks 190 are opposite. The second stud 128 and the third stud 129 are located in the hook-shaped areas of the two limiting hooks 190, respectively.

[0063] The limiting hook 190 has an effect on the gas flow in the gas chamber 121, especially for the gas input by the air pump 113.

[0064] First, when the gas input by the air pump 113 through the third hole 124 enters the opposite first limiting hook 190, the gas is guided by the first limiting hook 190 when entering the gas chamber 121. The thick end of the first limiting hook 190 concentrates the gas flow, guiding the gas to flow along the geometric shape of the limiting hook 190, thereby forming a relatively concentrated and orderly flow in the gas chamber 121, reducing the unevenness of the flow, the flow characteristics are relatively stable, and the mixing effect of the gas in the gas chamber 121 is improved. When the gas flow passes through the first limiting hook 190, especially when the gas flow rate is high, a vortex can be formed near the first limiting hook 190, rather than a vortex at the third hole 124, which can reduce the resistance of the vortex to the gas input by the air pump 113, thereby increasing the gas flow rate.

[0065] Second, due to the fact that the hole direction of the first hole 122 is not in the same direction as the entrance of the adjacent second limiting hook 190, the design of the closed tip causes the gas to accumulate a certain pressure in the second limiting hook 190. The presence of gas pressure prevents a large amount of gas from entering the second limiting hook 190, thereby quickly passing through the socket 130 from the first hole 122 into the arm belt 200, maintaining the stability of the gas flow.

[0066] The curved arc of the limiting hook 190 matches the shape of the stud in the second housing 120, or the curved arc of the limiting hook 190 is greater than the curved arc of the stud, so that the limiting hook 190 can surround at least half of the volume of the stud in the circumferential direction.

[0067] In the state that the gas chamber 121 is installed in the second housing 120, the limiting hooks 190 at both ends of the gas chamber 121 are oppositely arranged, thereby respectively contacting the second stud 128 and the third stud 129 to form a limiting mode. Each stud limits the movement of the gas chamber 121 in the short axis direction of the second housing 120.

[0068] The limiting hook 190 not only maintains the stability of the gas flow, but also ensures the stable positioning of the gas chamber 121 in the second housing 120, preventing the gas chamber 121 from moving or disengaging during use, improving the structural integrity and shock resistance of the equipment. The application of the special-shaped structure further optimizes the utilization of internal space, improves the compactness and reliability of the equipment.

[0069] As Figure 4 and Figure 5As shown, the second side of the air chamber 121 forms a limiting groove 180 in a way that the air chamber 121 is recessed inward. There is a passage between the limiting groove 180 and the first side of the air chamber 121 that allows gas to pass through. The limiting groove 180 makes the gas passage of the air chamber 121 partially narrow. According to the principle of fluid mechanics, when the gas passage is narrowed, the gas flow rate will increase. This is because the gas needs to pass through a smaller cross-sectional area, thereby accelerating the flow. The narrowing of the passage will cause the pressure drop to increase when the gas flows. This means that the air pressure will be reduced at the limiting groove 180, which will cause a lower pressure area after the gas flows out of the limiting groove 180.

[0070] The second hole 123 is close to the narrow passage between the limiting groove 180 and the first side of the air chamber 121. Due to the limiting groove 180 making the passage partially narrow, the gas flow rate increases here and decreases as the passage widens. With the interface of the second hole 123 and the pressure sensor 112, the pressure sensor 112 measures the pressure of the widened passage area through the second hole 123, and the advantages include:

[0071] In the widened passage area, the gas flow rate decreases and the flow is more stable. This makes the pressure measurement more stable and reduces the interference caused by turbulent flow; the decrease in flow rate means less vibration and noise, which improves the accuracy and reliability of the measurement data. Therefore, by measuring the pressure in the widened passage area, more stable and accurate data can be obtained.

[0072] As shown in Figure 4 and Figure 5 The second housing 120 is provided with a limiting support 181 at the position matching the limiting groove 180. In the state that the air chamber 121 is installed in the second housing 120, the limiting support 181 is located in the limiting groove 180, thereby limiting the movement of the air chamber 121 in the direction of the long axis of the second housing 120, while supporting the first housing 110.

[0073] The design of the limiting groove 180 and the limiting support 181 provides multi-directional stable support, effectively preventing the displacement of the air chamber 121 during use. This not only improves the structural strength of the housing, but also ensures the stability of the air pressure in the air chamber 121, thereby improving the accuracy and reliability of the measurement.

[0074] According to a preferred embodiment, the air chamber 121 is fixed to the inside of the second housing 120 by ultrasonic welding. The side of the air chamber 121 is provided with an ultrasonic wall 125. An ultrasonic welding line 126 is formed between the air chamber 121 and the second housing 120.

[0075] In the ultrasonic welding process, the ultrasonic wall 125 usually refers to certain structural features on the welding workpiece (such as a plastic part) for optimizing the welding effect. The ultrasonic wall 125 is usually a specially designed protrusion or groove. The ultrasonic wall 125 can concentrate ultrasonic energy, making the plastic material at the welding site more easily melted, thereby ensuring a firm weld. During the welding process, the ultrasonic wall 125 can help maintain the correct position and alignment of the workpiece, preventing displacement. The ultrasonic wall 125 helps to distribute energy evenly, ensuring uniform melting of the welding area, thereby improving the welding quality.

[0076] The ultrasonic welding line 126 is a special linear protrusion provided on the contact surface of the air chamber 121 and the inner side of the second shell 120. The ultrasonic welding line 126 is mainly used for energy concentration to ensure rapid and uniform melting. The ultrasonic welding line 126 is used to improve the welding strength and quality.

[0077] The air chamber 121 and the second shell 120 can also be integrally provided, so that the air chamber 121 becomes a cavity inside the second shell 120.

[0078] The ultrasonic welding method or the integrally provided manner of the air chamber 121 provides a high-strength and high-reliability connection method, ensuring the firm combination of the air chamber 121 and the shell. This not only improves the overall strength and shock resistance of the blood pressure measuring instrument 100, but also prevents gas leakage, further improving the safety and durability of the blood pressure measuring instrument 100.

[0079] Preferably, in the second shell 120, the power supply 114 is provided in the side area of the air pump 113. The power supply 114 abuts against the first side of the air chamber 121, thereby limiting the movement of the air chamber 121 in the longitudinal direction. Preferably, the air pump 113 is a T-shaped air pump, which is provided side by side with the power supply 114 in the second shell 120. Preferably, the second shell 120 is also provided with an interface 116. The interface 116 is electrically connected with the power supply 114 and connected with the circuit board 160. The interface 116 is used to charge the power supply 114 through a data line. Further preferably, as shown in Figures 2-5 , the first shell 110 is provided with a groove corresponding to the shape of the interface 116. In the case of assembling the first shell 110 and the second shell 120, the interface 116 can pass out of the groove for charging. Preferably, the interface 116 can be one of a Micro-USB interface, a USB Type-A interface, and a USB Type-C interface.

[0080] As shown in Figure 2 and Figure 6As shown, the second housing 120 is also provided with a resistance element 117. Exemplarily, the resistance element 117 is preferably 0.6 ohms. The size of the resistance element 117 can also be set as needed. The resistance element 117 is connected with the interface 116, and the resistance element 117 is connected with the power supply 114. That is, the resistance element 117 is arranged between the interface 116 and the power supply 114. The functions of the resistance element 117 include:

[0081] (1) The resistance element 117 can be used to protect the charging circuit and avoid damage to the circuit caused by the surge generated when connecting or disconnecting the charging line. Such resistance is usually used as a current-limiting element to reduce the instantaneous current and protect the internal charging circuit and the battery.

[0082] (2) The resistance element 117 is also used to identify device types and transmit control signals. For example, in USB Type-C interface, the resistance value connected to different pins can identify whether the device is a power-only device, a charging device, or a data transmission device. Such identification mechanism helps to ensure the compatibility and safety of the charging process.

[0083] Preferably, as shown in Figure 3 and Figure 5 , the resistance element 117 is arranged on the bracket 119. Preferably, the bracket 119 is combined with the resistance element 117 and arranged in the empty space of the air chamber 121. Preferably, the bracket 119 is combined with the resistance element 117 and arranged between the two limiting hooks 190, further limiting the movement of the air chamber 121, while also saving space in the housing. The bracket 119 includes a base and a plurality of pillars, which are used to clamp the resistance element 117 to achieve the limiting effect. The pillars also have the effect of supporting the circuit board 160.

[0084] The principle of the utility model is:

[0085] In actual use, whether it is a mechanical blood pressure measuring instrument 100 or an electronic blood pressure measuring instrument 100, the pneumatic pressure stabilizing structure plays a key role.

[0086] The mechanical blood pressure measuring instrument 100 is manually operated, which utilizes the Butterworth reaction principle. When the gas in the arm band 200 is stressed, the air pressure is generated, the pointer points to the blood pressure size, and the blood pressure value is judged. The electronic blood pressure measuring instrument 100 changes the gas pressure in the arm band 200 by applying pressure through the arm band 200, and the pressure sensor 112 senses the change of the gas pressure and converts it into digital display, showing the peak and valley values of the blood pressure.

[0087] The blood pressure measuring instrument 100 inflates and pressurizes the arm band 200 using the air pump 113, uses the inflated arm band 200 to compress the arterial blood vessels, and makes the arterial blood vessels in a completely closed state. Then, the air release valve is opened, and the pressure in the arm band 200 is slowly reduced. With the reduction of the pressure in the arm band 200, the arterial blood vessels show a change process of "completely closed - gradually open - completely open". The amplitude change trend of the pressure in the artery during the pressure reduction process is as shown in the following table. Figure 7

[0088] The pressure sensor 112 collects the pressure value and its change in the arm band 200, converts it into a digital signal input into the circuit board 160, thereby obtaining the corresponding pressure points in the process of the arterial blood flow being blocked, and calculating the diastolic pressure, systolic pressure and mean pressure of the human body.

[0089] It should be noted that the above specific embodiments are exemplary, and those skilled in the art can come up with various solutions under the inspiration of the disclosure of the present application, and these solutions also belong to the disclosed range of the present application and fall within the protection scope of the present application. Those skilled in the art should understand that the present application specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of the present application is defined by the claims and their equivalents. The present application specification contains multiple invention concepts, such as "preferably" and "according to one preferred embodiment", which all indicate that the corresponding paragraphs disclose an independent concept, and the applicant reserves the right to file a divisional application according to each invention concept.​

Claims

1. A blood pressure measuring device, characterized by, The blood pressure measuring device comprises a blood pressure measuring instrument (100) and an arm band (200), the blood pressure measuring instrument (100) is provided with a socket (130) communicated with a pneumatic pressure stabilizing structure, the arm band (200) is provided with a plug (220) communicated with an air bag in the arm band (200), The pneumatic pressure stabilizing structure is composed of a non-deformable air chamber (121) and a gas filling and discharging integrated air pump (113), In the case that the arm band (200) is inserted into the socket (130) of the blood pressure measuring instrument (100) through the plug (220), the pneumatic pressure stabilizing structure is communicated with the air bag in the arm band (200) and maintains the stable air pressure of the air bag.

2. The blood pressure measuring device according to claim 1, characterized in that, The first end of the air chamber (121) is connected with the socket (130) in a manner allowing air delivery, and the other end of the air chamber (121) is connected with the air pump (113) and communicated, so that the air output by the air pump (113) is buffered in the air chamber (121) and maintains the stable air pressure.

3. The blood pressure measuring device according to claim 2, characterized in that, The air chamber (121) is provided with a first hole (122), a second hole (123) and a third hole (124) with different directions, The air chamber (121) is a non-deformable cavity component, The first hole (122) is communicated with the socket (130), The second hole (123) is communicated with the interface of the pressure measuring assembly, The third hole (124) is communicated with the interface of the air pump (113), So that the air in the air chamber (121) is input into the arm band (200) through the socket (130).

4. The blood pressure measuring device according to claim 3, wherein The distance between the second hole (123) and the first hole (122) is smaller than the distance between the third hole (124) and the first hole (122), so that the pressure measuring assembly collects the air pressure data of the air near the socket (130) which has been in a stable state.

5. The blood pressure measuring device according to any one of claims 1 to 4, characterized in that The air chamber (121) is a special-shaped structure, and the two ends of the air chamber (121) are respectively provided with limiting hooks (190) for limiting the relative position with the studs in the second shell (120), The bending radius of the limiting hook (190) matches the shape of the stud, In the state that the air chamber (121) is installed in the second shell (120), the limiting hooks (190) at the two ends of the air chamber (121) are oppositely arranged and in contact with the studs to form a limiting mode, thereby limiting the movement of the air chamber (121) in the short axis direction of the second shell (120).

6. The blood pressure measuring device according to any one of claims 1 to 4, characterized in that The first hole (122), the second hole (123) and the third hole (124) of the air chamber (121) are provided with sealing rings (300) for sealing the interfaces between the first hole (122) and the socket (130), the second hole (123) and the pressure measuring assembly, and the third hole (124) and the air pump (113).

7. The blood pressure measuring device according to any one of claims 1 to 4, characterized in that The second side of the air chamber (121) forms a limiting groove (180) in a way that the air chamber (121) is recessed inwardly, and there is a passage allowing gas to pass between the limiting groove (180) and the first side of the air chamber (121), A limiting support (181) is arranged at the position of the second shell (120) matching the limiting groove (180), In the state that the air chamber (121) is installed in the second shell (120), the limiting support (181) is located in the limiting groove (180), thereby limiting the movement of the air chamber (121) in the long axis direction of the second shell (120).

8. The blood pressure measuring device according to any one of claims 1 to 4, characterized in that The air chamber (121) is fixed to the inner side of the second shell (120) by ultrasonic welding.

9. The blood pressure measuring device according to any one of claims 1 to 4, characterized in that The air chamber (121) is integrally arranged with the second shell (120), so that the air chamber (121) forms a cavity in the second shell (120).

10. The pneumatic pressure stabilizing structure of a blood pressure measuring device is characterized in that, The pneumatic pressure stabilizing structure is composed of an invariable air chamber (121) and a gas charging and discharging integrated gas pump (113), The pneumatic pressure stabilizing structure is in communication with the socket (130) on the blood pressure measuring instrument (100), In the case that the arm band (200) is inserted into the socket (130) through the plug-in part (220) in a way that there is no connecting tube, the pneumatic pressure stabilizing structure is in communication with the air bag in the arm band (200) and maintains the stable gas pressure of the air bag.

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