A pressure-stabilizing air pump device and an electronic blood pressure monitor

Abstract

This application relates to the field of blood pressure measurement technology, and more particularly to a pressure-stabilizing air pump device and an electronic blood pressure monitor. The pressure-stabilizing air pump device includes a motor, an integrated air circuit assembly, and a pressure stabilizing component. The integrated air circuit assembly includes a housing and an air guide member disposed inside the housing. The housing and the air guide member cooperate to form an air inlet area and an inflation area, with the air guide member penetrating both the air inlet area and the inflation area. The motor is connected to the air guide member. The pressure stabilizing component is hollow and covers the housing to seal the inflation area, forming a pressure-stabilizing inner cavity. The pressure stabilizing component has an inflation channel that communicates with the pressure-stabilizing inner cavity. During inflation, the gas in this technical solution first enters the pressure-stabilizing inner cavity for temporary storage, and then slowly flows into the cuff through the inflation channel. This solves the problem of large pressure fluctuations and distorted measurement results in existing cuff-type blood pressure monitors due to the lack of a buffer structure in the air circuit system and the instantaneous uncontrollability of inflation control during the inflation phase.

Description

Technical Field

[0001] This application relates to the field of blood pressure measurement technology, and in particular to a pressure-stabilizing air pump device and an electronic blood pressure monitor. Background Technology

[0002] In the field of blood pressure measurement technology, cuff blood pressure monitors have become the mainstream device for clinical and home blood pressure monitoring due to their convenience. During the inflation phase of blood pressure measurement, existing devices generally use an inflation pump to pressurize to the target pressure, and then control the gas discharge through a simple inflation valve to maintain pressure stability. However, in practical applications, due to the instantaneous and uncontrollable nature of the inflation process, rapid gas discharge can cause drastic fluctuations in the cuff pressure. The existing gas path system lacks a buffer structure; gas flows directly into the cuff from the inflation port, making it difficult to effectively regulate pressure changes. This pressure instability leads to large pressure fluctuations within the cuff and distorted measurement results.

[0003] The above issues need to be addressed. Utility Model Content

[0004] This application provides a pressure-stabilizing air pump device to solve the problem that existing cuff-type blood pressure monitors suffer from large pressure fluctuations and distorted measurement results due to the lack of a buffer structure in the air circuit system and the instantaneous uncontrollability of the inflation control during the inflation phase.

[0005] In a first aspect, this application provides a pressure-stabilizing air pump device, comprising a motor, an integrated air circuit assembly, and a pressure stabilizing component; wherein, the integrated air circuit assembly includes a housing and an air guide member disposed inside the housing; the housing and the air guide member cooperate to form an air inlet area and an air filling area, the air guide member passing through the air inlet area and the air filling area; the motor is connected to the air guide member; the pressure stabilizing component is hollow inside and covers the housing to close the air filling area to form a pressure-stabilizing inner cavity; the pressure stabilizing component is provided with an air filling channel, the air filling channel communicating with the pressure-stabilizing inner cavity.

[0006] Furthermore, the inflation channel has a first-stage air channel and a second-stage air channel that are interconnected; the inner diameter of the second-stage air channel is smaller than the inner diameter of the first-stage air channel.

[0007] Furthermore, the ratio of the inner diameter of the second-stage airway to the inner diameter of the first-stage airway is 1:2.

[0008] Furthermore, the length of the second-stage airway is in the ratio of 1 / 3 to 2 / 3 to the length of the first-stage airway.

[0009] Furthermore, the longitudinal section of the voltage-stabilizing cavity is rectangular.

[0010] Furthermore, the inflation channel is located above the air outlet of the air guide member and offset from the central axis of the air outlet.

[0011] Furthermore, the voltage stabilizer has a flange arranged circumferentially in the assembly direction toward the housing; the housing has a recessed groove on the side toward which the voltage stabilizer is assembled; the flange is embedded in the recessed groove.

[0012] Furthermore, the depth of the recessed groove is between 1 mm and 5 mm.

[0013] In addition, an electronic blood pressure monitor is proposed, including a control module, a cuff, and the aforementioned pressure-stabilizing air pump device; the control module is electrically connected to the motor; and the cuff is connected to the inflation channel.

[0014] The technical solutions provided in this application have the following advantages compared with the prior art:

[0015] This solution addresses the fundamental problem of sudden pressure changes in traditional blood pressure monitors during the stabilization phase due to the lack of a buffer structure, by adding a pressure stabilizing component and optimizing the airflow structure. The solution includes a motor, an integrated airflow assembly, and a pressure stabilizing component. The integrated airflow assembly includes a housing and an air guide member located inside the housing. The housing and the air guide member cooperate to form an air inlet area and an inflation area, with the air guide member connecting both areas. The motor is connected to the air guide member. The pressure stabilizing component is hollow and covers the housing to seal the inflation area, forming a pressure-stabilizing inner cavity. The pressure stabilizing component has an inflation channel that communicates with the pressure-stabilizing inner cavity. This solution addresses the issue of rapid, transient gas expulsion into the cuff by first storing the gas in this pressure-stabilizing inner cavity before it slowly flows into the cuff through the inflation channel. This process eliminates the rapid, transient gas fluctuations that would otherwise occur with rapid, transient gas expulsion. This solves the problem of large pressure fluctuations and distorted measurement results in existing cuff-type blood pressure monitors due to the lack of a buffer structure in the gas path system and the instantaneous uncontrollability of inflation control during the inflation phase. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0019] Figure 1 This is a schematic diagram of the pressure-stabilizing air pump device of this application;

[0020] Figure 2 This is a cross-sectional view of the internal structure of the pressure-stabilizing air pump device of this application;

[0021] Figure 3 for Figure 2 Enlarged schematic diagram of the central air inlet 170;

[0022] Figure 4 This is a structural diagram showing the location of the air passage in this application;

[0023] Figure 5 This is an explosion diagram of the pressure-stabilizing air pump device of this application;

[0024] Figure 6 This is a schematic diagram of the electronic blood pressure monitor and pressure-stabilizing air pump device of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 110. Motor; 120. Integrated air circuit assembly; 121. Housing; 122. Air guide component; 123. Recessed groove; 130. Pressure stabilizer; 131. Flange; 140. Air inlet area; 150. Inflation area; 160. Pressure stabilizing cavity; 170. Inflation channel; 171. First-stage air channel; 172. Second-stage air channel; 180. Air outlet; 181. Central axis; 210. Control module; 220. Cuff; 230. Pressure stabilizing air pump device. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0029] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0030] To address the problem that existing cuff-type blood pressure monitors suffer from large pressure fluctuations and distorted measurement results during the pressure stabilization phase due to the lack of a buffer structure in the gas path system and the instantaneous uncontrollability of inflation control.

[0031] like Figures 1 to 4 As shown, the inventors provide a pressure-stabilizing air pump device 230, including a motor 110, an integrated air circuit assembly 120, and a pressure stabilizer 130; wherein, the integrated air circuit assembly 120 includes a housing 121 and an air guide member 122 disposed inside the housing 121; the housing 121 and the air guide member 122 cooperate to form an air inlet area 140 and an air filling area 150, and the air guide member 122 passes through the air inlet area 140 and the air filling area 150; the motor 110 is connected to the air guide member 122; the pressure stabilizer 130 is hollow inside and covers the housing 121 to close the air filling area 150; the pressure stabilizer 130 is provided with an air filling channel 170, and the air filling channel 170 communicates with the pressure-stabilizing inner cavity 160.

[0032] In this embodiment, the motor 110 is located below the housing 121, which has an air inlet on one side of its bottom. External gas enters the interior of the housing 121 through this air inlet. When the motor 110 is working, it rotates to drive the air guiding member 122 to move. When the air guiding member 122 moves, it creates a negative pressure in the air intake area 140. Therefore, external gas can enter the interior of the housing 121 through the air inlet due to the pressure difference.

[0033] As the gas entering the housing 121 moves further with the air guide member 122, the air guide member 122 pumps the gas from the air intake zone 140 into the inflation zone 150. After the gas converges in the inflation zone 150, it flows out from the air outlet 180 on the air guide member 122, thereby entering the interior of the pressure stabilizer 130. The gas stays in the pressure stabilizing cavity 160 to achieve the purpose of gas buffering, preventing the gas flowing out from the air outlet 180 from flowing directly from the inflation channel 170 into the cuff 220.

[0034] It should be noted that the motor 110 and the air guide component 122 in this embodiment are existing technologies. In this technical solution, it is sufficient to pump the gas into the pressure stabilizing component 130. The inflation speed of the motor 110 and the air guide component 122 is not limited. In this embodiment, regardless of the inflation speed, as long as the gas enters the pressure stabilizing component 130 from the inflation port of the air guide component 122, it can be held and buffered in the inner cavity formed by the pressure stabilizing component 130, and then flow into the sleeve from the inflation channel 170.

[0035] Due to limitations in the inflation speed control of existing products, dynamic fluctuations during the inflation phase are unavoidable. Even with a precision pump to stabilize the inflation speed, the initial impact of gas entering the cuff can still cause instantaneous pressure fluctuations. However, the pressure stabilizer 130 in this technical solution absorbs these dynamic impacts caused by the inflation speed through its hollow inner cavity, resulting in a smoother airflow fluctuation area. Furthermore, during the inflation phase, the pressure stabilizer 130 can convert sudden large-flow inflation into stable small-flow deflation, avoiding measurement errors caused by sudden pressure drops. Therefore, the pressure stabilizer 130 in this technical solution can solve the problem of large pressure fluctuations and distorted measurement results in the existing cuff 220 blood pressure monitor during the pressure stabilization phase due to the lack of a buffer structure in the gas path system and the instantaneous uncontrollability of inflation control.

[0036] like Figure 2 and Figure 3As shown, furthermore, to ensure that the gas is further buffered during its discharge from the hollow inner cavity into the sleeve, resulting in a smoother airflow, the inflation channel 170 has a first-stage air channel 171 and a second-stage air channel 172 that are interconnected; the inner diameter of the second-stage air channel 172 is smaller than the inner diameter of the first-stage air channel 171. The ratio of the inner diameter of the second-stage air channel 172 to the inner diameter of the first-stage air channel 171 is 1:2.

[0037] It should be understood that by designing the inflation channel 170 as a first-stage air channel 171 and a second-stage air channel 172 with progressively smaller inner diameters, the principle of gas velocity change and pressure attenuation as it flows through channels of different inner diameters is utilized to achieve secondary buffering of the gas during its discharge from the hollow inner cavity to the sleeve. On the one hand, the gas is initially slowed down in the relatively large first-stage air channel 171, and then, upon entering the narrower second-stage air channel 172, the gas velocity is further reduced and the flow rate is limited due to the reduced cross-sectional area of ​​the flow channel, thus avoiding a sudden drop in pressure caused by excessively rapid inflation. On the other hand, the structure of the two-stage air channels increases the gas flow path and resistance, making the airflow fluctuations tend to be stable during continuous buffering.

[0038] In addition, the design of a 1:2 ratio between the inner diameter of the second-stage airway 172 and the inner diameter of the first-stage airway 171 is easy to process and manufacture, ensuring the buffering effect without making the structure too complex or prone to blockage.

[0039] In summary, the pressure-stabilizing air pump in this technical solution effectively solves the problems of instantaneous and uncontrollable gas discharge in traditional inflation methods, reduces drastic pressure fluctuations within the cuff, and achieves a more stable airflow and more uniform pressure changes during inflation, providing a more stable pressure environment for accurate blood pressure measurement.

[0040] Furthermore, the length of the second-stage airway 172 is between 1 / 3 and 2 / 3 of the length of the first-stage airway 171.

[0041] It should be understood that, for example, if the length of the second-stage airway 172 is too short, the gas cannot be sufficiently decelerated and buffered, failing to effectively suppress pressure fluctuations; if the length is too long, it will increase unnecessary flow resistance, resulting in low inflation efficiency. Within the 1 / 3 to 2 / 3 ratio range, when the gas flows in the narrow-diameter second-stage airway, it can generate sufficient frictional resistance due to the path length to consume airflow energy and reduce flow velocity, without affecting the overall inflation efficiency due to excessive resistance. This setting effectively solves the problems of excessively fast gas expulsion speed and violent pressure fluctuations during traditional inflation, ensuring that the gas is sufficiently buffered as it enters the cuff, resulting in more stable airflow and more uniform pressure changes, thereby improving the stability and accuracy of pressure control in applications such as blood pressure measurement.

[0042] Further such as Figure 4 As shown, the inflation channel 170 is located above the air outlet 180 of the air guide member 122 and offset from the central axis 181 of the air outlet 180.

[0043] The inflation channel 170 is positioned above the air outlet 180 of the air guide component 122 and offset from the central axis 181. Its core principle lies in utilizing the inertia and gravity of gas flow to break the single path of direct gas impact on the inflation channel 170, thus achieving airflow dispersion and buffering. When gas is discharged from the air guide component 122, due to the eccentric design of the inflation channel 170, the gas cannot directly and rapidly enter the inflation channel 170. Instead, it first diffuses within the hollow cavity of the pressure stabilizer 130, changing its flow direction before slowly entering the inflation channel 170. This effectively solves the problem of excessively high flow rate and sudden pressure rise caused by direct gas impact on the inflation channel 170 in traditional gas circuits.

[0044] To enhance the gas storage capacity of the pressure regulator 130, its internal hollow region forms the pressure-regulating cavity 160. The longitudinal section of the pressure-regulating cavity 160 is designed as a rectangle; compared to conventional shapes, this structure maximizes internal space utilization and effectively increases gas storage capacity. Furthermore, the shape of the pressure-regulating cavity 160 can be flexibly adjusted according to different application scenarios and installation requirements, such as adopting a near-elliptical design. Regardless of the shape, the core principle is to achieve efficient gas storage and buffering through rational space planning, ensuring a stable pressure output within the sleeve.

[0045] Further such as Figure 5 As shown, the voltage regulator 130 has a flange 131 arranged circumferentially in the assembly direction facing the housing 121; the housing 121 has a recessed groove 123 on the side facing the voltage regulator 130; the flange 131 is embedded in the recessed groove 123. The depth of the recessed groove 123 is between 1 mm and 5 mm.

[0046] The recessed groove 123 on the housing 121 forms an embedded fit with the circumferential flange 131 of the pressure stabilizer 130, expanding the original pressure-stabilizing cavity volume without significantly increasing the overall size of the device. When the pressure stabilizer 130 is assembled to the housing 121, the flange 131 is embedded in the recessed groove 123, which is 1mm to 5mm deep. The two enclose an additional gas storage space, which is connected to the hollow cavity of the pressure stabilizer 130, effectively increasing the total gas storage capacity. This design directly addresses the pain points of insufficient gas storage space and limited buffering capacity during pressure fluctuations in existing technologies. By increasing the gas capacity, it significantly improves the gas pump's ability to absorb and regulate pressure changes, making the airflow more stable during the filling process. Precisely limiting the groove depth to 1mm to 5mm solves the problem of compact internal space and gas storage requirements, maximizing the volume of the pressure-stabilizing cavity 160 within the limited space, while avoiding the impact of excessive depth on assembly processes or structural strength.

[0047] Furthermore, the interference fit between the flange 131 and the recessed groove 123 facilitates assembly during the production process. The flange 131 and the groove fit tightly together, requiring no additional auxiliary parts, greatly simplifying the production process and reducing assembly difficulty and time costs. In other embodiments, the flange 131 and the recessed groove 123 can also be assembled using ultrasonic welding. In ultrasonic welding, the heat generated by high-frequency vibration melts the contact area between the flange 131 and the groove, forming a robust and highly airtight integrated structure. However, both the convenience of interference fit and the high sealing performance of ultrasonic welding ensure that the pressure-stabilizing cavity 160 forms a sealed space, preventing gas leakage from the outlet 180 of the gas guide component 122 into the pressure-stabilizing cavity 160 and thus preventing gas buffering.

[0048] An electronic blood pressure monitor, such as Figure 6 As shown, it includes a control module 210, a cuff 220, and a pressure-stabilizing air pump device 230 described above; the control module 210 is electrically connected to the motor 110; the cuff 220 is connected to the inflation channel 170.

[0049] When the electronic blood pressure monitor is working, the control module 210 first controls the motor 110 to start, driving the air guide component 122 to rotate. Gas flows in through the air inlet area 140 of the integrated air path component 120 and enters the inflation area 150 through the through air guide component 122. During this process, the pressure stabilizing component 130 of the pressure stabilizing pump device 230 plays a role. Its internal pressure stabilizing chamber, in conjunction with the specially structured inflation channel 170, buffers and regulates the airflow. Gas is stably output from the inflation channel 170 to the cuff 220, causing the pressure inside the cuff 220 to gradually rise to the target value. After the target pressure is reached, the control module 210 controls the motor 110 to adjust its working state, either maintaining a small inflation or relying solely on the cooperation of the pressure stabilizing component 130 and the inflation channel 170 to achieve stable pressure maintenance inside the cuff 220, providing a stable pressure environment for blood pressure measurement. Finally, the control module 210 calculates and displays the blood pressure value based on the feedback data from the pressure sensor.

[0050] The pressure-stabilizing air pump device 230 effectively solves the problems of improper inflation speed and large pressure fluctuations during the stabilization phase of traditional blood pressure monitors. By optimizing the gas flow path and buffer structure, it reduces the problem of uneven pressure and fluctuations within the cuff 220.

[0051] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0052] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0054] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0055] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0057] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Since these modifications and variations fall within the scope of the claims and their equivalents, this application also intends to include these modifications and variations.

[0058] The above description describes specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A pressure-stabilizing air pump device, characterized in that: Includes motors, integrated pneumatic circuit components, and voltage regulators; The integrated gas path assembly includes a housing and a gas guide component disposed inside the housing; The housing cooperates with the air guide member to form an air intake area and an inflation area, and the air guide member passes through the air intake area and the inflation area; The motor is connected to the air guide component; The pressure regulator is hollow inside and covers the housing to seal the inflation area to form a pressure-stabilizing inner cavity; The pressure stabilizing component is provided with an air inlet, which is connected to the pressure stabilizing inner cavity.

2. The pressure-stabilizing air pump device according to claim 1, characterized in that: The inflation channel has a first-level air channel and a second-level air channel that are interconnected. The inner diameter of the second-stage airway is smaller than that of the first-stage airway.

3. The pressure-stabilizing air pump device according to claim 2, characterized in that: The ratio of the inner diameter of the second-stage airway to the inner diameter of the first-stage airway is 1:

2.

4. A pressure-stabilizing air pump device according to claim 2, characterized in that: The length of the second-stage airway is between 1 / 3 and 2 / 3 of the length of the first-stage airway.

5. A pressure-stabilizing air pump device according to claim 1, characterized in that: The inflation channel is located above the air outlet of the air guide member and offset from the central axis of the air outlet.

6. The pressure-stabilizing air pump device according to claim 1, characterized in that: The longitudinal section of the voltage-stabilizing inner cavity is rectangular.

7. A pressure-stabilizing air pump device according to claim 1, characterized in that: The voltage stabilizer has a flange arranged circumferentially in the assembly direction toward the housing; The housing has a recessed groove on the side facing the voltage stabilizer assembly; The flange is embedded in the recessed groove.

8. A pressure-stabilizing air pump device according to claim 7, characterized in that: The depth of the recessed groove is between 1 mm and 5 mm.

9. An electronic blood pressure monitor, characterized in that: Includes a control module, a cuff, and a pressure-stabilizing air pump device as described in any one of claims 1-8; The control module is electrically connected to the motor; The cuff is connected to the inflation channel.

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