Sphygmomanometer pipeline assembly and sphygmomanometer

Abstract

The utility model discloses a sphygmomanometer pipeline assembly and a sphygmomanometer, the sphygmomanometer pipeline assembly comprises a connecting piece, a first interface, a second interface, a third interface and a fourth interface, the connecting piece is internally provided with an air passing channel, and the first interface, the second interface, the third interface and the fourth interface are communicated with the air passing channel and the outside; the first interface is configured to be communicated with an outer pipe of a pipeline; the first pressure sensor is used for detecting the air pressure in the pipeline, and the first pressure sensor is communicated with the second interface; the first electromagnetic valve is used for discharging gas in a pipeline to an external space, and the first electromagnetic valve is communicated with the third connector; and the air pump is communicated with the fourth connector. The air tightness is improved, and the accuracy of a blood pressure measurement result and the working stability of an instrument are improved.

Description

Technical Field

[0001] This utility model relates to the field of blood pressure measurement technology, and in particular to a tubing assembly and a blood pressure monitor. Background Technology

[0002] An electronic blood pressure monitor is a medical device that uses a pressure sensor to detect vibration signals from the blood vessel walls and then converts these signals into digital values ​​to calculate systolic and diastolic blood pressure. Compared to traditional mercury sphygmomanometers, it offers advantages such as intelligent operation and intuitive data display, and is widely used in home health monitoring and clinical diagnosis.

[0003] During blood pressure measurement, an electric air pump needs to inflate the cuff through the air circuit system to establish a baseline pressure, which is then transmitted to the pressure sensor via the artery. Current technologies commonly employ multiple two-way and three-way connectors to create a multi-branch structure. While this design achieves tubing connections between the air pump, cuff, and sensor, the multi-connector structure results in multiple sealing interfaces in the air circuit. Pressure differences between these interfaces can easily lead to gas leakage. This leakage causes pressure attenuation during the pressure maintenance phase, directly affecting the accuracy of sensor signal acquisition. Utility Model Content

[0004] The main purpose of this invention is to propose a tubing assembly for a blood pressure monitor, which aims to solve the technical problem of multiple joints and easy air leakage.

[0005] To achieve the above objectives, the present invention provides a pipeline assembly comprising:

[0006] A connector having an internal air passage and a first interface, a second interface, a third interface and a fourth interface connecting the air passage to the outside, wherein the first interface is configured to communicate with the outer pipe of the pipeline.

[0007] A first pressure sensor is used to detect the air pressure in the pipeline, and the first pressure sensor is connected to the second interface.

[0008] A first solenoid valve is used to discharge gas in the pipeline to the external space, and the first solenoid valve is connected to the third interface.

[0009] An air pump, which is connected to the fourth interface.

[0010] Optionally, the connector further has a fifth interface and a sixth interface, both of which are connected to the air passage;

[0011] The piping assembly also includes a second pressure sensor and a second solenoid valve. The second pressure sensor is connected to the fifth interface, and the second solenoid valve is connected to the sixth interface.

[0012] Optionally, the connector is a six-way silicone tube.

[0013] This application also proposes a blood pressure monitor, which includes a housing, a sealing element, an outer tube unit, and a tubing assembly;

[0014] The box has a sealed space and an installation channel connecting the sealed space with the external space. The box includes a first shell and a second shell, which are closed relative to each other to form the sealed space. The sealed space is used to install pipeline assemblies.

[0015] The sealing element is disposed between the first housing and the second housing so that the sealing element can seal the gap between the first housing and the second housing;

[0016] The outer tube unit includes an outer tube and a first sealing ring. One end of the outer tube is disposed in the sealing space through the installation channel and communicates with the first interface of the pipeline assembly. The first sealing ring is disposed in the installation channel and sleeved on the outer tube.

[0017] The second housing has a first sealing groove on the side wall that abuts against the first housing. The first sealing groove extends circumferentially along the second housing, and the sealing element is disposed in the first sealing groove.

[0018] The first housing has a corresponding abutment protrusion that extends along the circumference of the first housing and abuts against the seal.

[0019] Optionally, the blood pressure monitor further includes fasteners and a second sealing ring;

[0020] The second housing has a through hole and a second sealing groove. The second sealing groove is opened on the outside of the second housing, and the through hole is opened at the bottom of the second sealing groove. The through hole penetrates the inner side of the second housing.

[0021] The first housing has a fixing hole corresponding to the through hole, the second sealing ring is disposed in the second sealing groove, and one end of the fastener passes through the second sealing ring and the through hole and is connected to the fixing hole.

[0022] Optionally, a first mounting cavity is provided on the side wall where the first housing abuts against the second housing, and the first mounting cavity connects the internal space of the first housing with the external space of the first housing;

[0023] The side wall of the second housing that abuts against the first housing has a second mounting cavity. The second mounting cavity connects the internal space of the second housing with the external space of the second housing. The first mounting cavity and the second mounting cavity are correspondingly arranged so that the first mounting cavity and the second mounting cavity enclose each other to form the mounting channel.

[0024] Optionally, the blood pressure monitor further includes a button and a control switch. The button includes a pressing part, an elastic part, and a sealing part. The elastic part is disposed on one side of the pressing part and extends circumferentially along the pressing part. The sealing part is disposed at the end of the elastic part away from the pressing part, and the sealing part is disposed at an angle to the elastic part.

[0025] The first housing includes a housing body and a pressing plate. The housing body has a first mounting groove that extends through the inner and outer sides of the housing body. The button is disposed in the first mounting groove. The pressing plate has a clearance hole. The pressing plate is disposed on the inner side of the housing body. The side of the pressing plate facing the housing body fits against the side of the sealing part that is away from the housing body. The clearance hole is provided corresponding to the pressing part.

[0026] The control switch is located in the sealed space and is positioned corresponding to the pressing part.

[0027] Optionally, a second mounting groove is also provided on the inner side of the shell body, the first mounting groove is provided at the bottom of the second mounting groove, and the side of the sealing part facing the second mounting groove is in contact with the groove wall of the second mounting groove.

[0028] The sealing part has a sealing rib on the side opposite to the pressing plate. The sealing rib extends circumferentially along the sealing part and abuts against the pressing plate.

[0029] This utility model relates to a pipeline assembly. The connector has an internal air passage and four external interfaces connecting the air passage to the outside. The first interface connects to the outer pipe of the pipeline. A first pressure sensor connects to the second interface, allowing the first pressure sensor to detect the internal air pressure of the pipeline. A first solenoid valve connects to the third interface, allowing the first solenoid valve to release gas from inside the pipeline to the external space. An air pump connects to the fourth interface, allowing the air pump to inflate the pipeline. Because the connector has multiple connection ports, it can communicate with the outer pipe of the pipeline, the first solenoid valve, the first pressure sensor, and the air pump. Compared to existing pipelines that require multiple two-way or three-way connectors, this application reduces the number of interfaces added when multiple two-way or three-way connectors are connected, thereby reducing the overall number of interfaces in the pipeline, improving the overall sealing of the pipeline, reducing gas leakage, and thus improving the accuracy of blood pressure monitor signal acquisition. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the blood pressure monitor of this utility model from one perspective;

[0032] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at point AA;

[0033] Figure 3 for Figure 2 A magnified view of a section at point I;

[0034] Figure 4 for Figure 2 Enlarged view of a section at point II;

[0035] Figure 5 This is a structural schematic diagram of the blood pressure monitor of this utility model from another perspective;

[0036] Figure 6 for Figure 1 Schematic diagram of the cross-sectional structure at point BB;

[0037] Figure 7 for Figure 6 Enlarged view of a section at point III;

[0038] Figure 8 This is a schematic diagram of the exploded structure of the blood pressure monitor of this utility model;

[0039] Figure 9 This is another exploded structural diagram of the blood pressure monitor of this utility model;

[0040] Figure 10 for Figure 9 Enlarged view of a section at point IV;

[0041] Figure 11 This is another exploded structural diagram of the blood pressure monitor of this utility model;

[0042] Figure 12 for Figure 9 A magnified view of section V;

[0043] Figure 13 This is a schematic diagram of the button structure of the blood pressure monitor of this utility model.

[0044] Explanation of icon numbers:

[0045]

[0046] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0048] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0049] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text is to include three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0050] This utility model relates to a blood pressure monitor assembly for use in electronic blood pressure monitors. The blood pressure monitor includes a tubing assembly, a housing, and an outer tube of the tubing. The tubing assembly is disposed inside the housing, and the outer tube of the tubing passes through the housing and communicates with the first interface of the tubing assembly.

[0051] This utility model proposes a pipeline assembly.

[0052] In the embodiments of this utility model, such as Figures 1 to 13 As shown, the piping assembly includes:

[0053] A connector having an internal air passage and a first interface, a second interface, a third interface and a fourth interface connecting the air passage to the outside, wherein the first interface is configured to communicate with the outer pipe of the pipeline.

[0054] A first pressure sensor is used to detect the air pressure in the pipeline, and the first pressure sensor is connected to the second interface.

[0055] A first solenoid valve is used to discharge gas in the pipeline to the external space, and the first solenoid valve is connected to the third interface.

[0056] An air pump, which is connected to the fourth interface.

[0057] The connector connects the first pressure sensor, the first solenoid valve, the air pump, and the outer tube of the tubing. This allows the user to inflate the tubing using the air pump, enabling the cuff to wrap snugly around the arm as needed. The first pressure sensor monitors the air pressure in the tubing in real time and sends a signal to the controller once a preset pressure is reached. The controller then stops the air pump, maintaining stable air pressure in the tubing. The first solenoid valve releases gas from the tubing after blood pressure measurement, allowing the cuff to loosen and be removed from the user's arm.

[0058] The connector can be a 4-way connector, and its shape is not specifically limited, as long as it can serve as an interface for connection. The connector material can be silicone, plastic, metal, etc., without specific restrictions, as long as the first pressure sensor, the first solenoid valve, the air pump, and the outer tube of the pipeline can be connected through the corresponding interface. The air pump is used to fill the pipeline with gas, allowing the pipeline to be inflated as needed.

[0059] This utility model relates to a pipeline assembly. The connector has an internal air passage and four external interfaces connecting the air passage to the outside. The first interface connects to the outer pipe of the pipeline. A first pressure sensor connects to the second interface, allowing the first pressure sensor to detect the internal air pressure of the pipeline. A first solenoid valve connects to the third interface, allowing the first solenoid valve to release gas from inside the pipeline to the external space. An air pump connects to the fourth interface, allowing the air pump to inflate the pipeline. Because the connector has multiple connection ports, it can communicate with the outer pipe of the pipeline, the first solenoid valve, the first pressure sensor, and the air pump. Compared to existing pipelines that require multiple two-way or three-way connectors, this application reduces the number of interfaces added when multiple two-way or three-way connectors are connected, thereby reducing the overall number of interfaces in the pipeline, improving the overall sealing of the pipeline, reducing gas leakage, and thus improving the accuracy of blood pressure monitor signal acquisition.

[0060] In some examples, such as Figure 8 and Figure 9 As shown, the connector also has a fifth interface and a sixth interface, both of which are connected to the air passage;

[0061] The piping assembly also includes a second pressure sensor and a second solenoid valve. The second pressure sensor is connected to the fifth interface, and the second solenoid valve is connected to the sixth interface.

[0062] The second pressure sensor is used as a backup. The redundant design of the dual pressure sensors helps prevent the controller from being unable to obtain the air pressure inside the pipeline when a single pressure sensor fails. At the same time, the dual pressure sensors are also used to mutually calibrate the detection data to prevent inaccurate data from a single pressure sensor, so that users can obtain more accurate blood pressure measurements.

[0063] Similarly, the second solenoid valve is also used as a backup. The redundant design of the dual solenoid valves helps to prevent the gas in the pipeline from being unable to be discharged to the outside space when a single solenoid valve fails, thereby improving the overall stability of the pipeline during operation and reducing the failure rate of the instrument.

[0064] In some examples, such as Figure 8 and Figure 9 As shown, the connector is a six-way silicone tube.

[0065] Compared to other connectors, the silicone material of the six-way silicone tubing improves the sealing of the pipe connection and makes it easier for external pipes to be inserted into the corresponding interface.

[0066] In some examples, such as Figures 8 to 11 As shown, the blood pressure monitor includes a housing, a sealing element, an outer tube unit, and a tubing assembly;

[0067] The box has a sealed space and an installation channel connecting the sealed space with the external space. The box includes a first shell and a second shell, which are closed relative to each other to form the sealed space. The sealed space is used to install pipeline assemblies.

[0068] The sealing element is disposed between the first housing and the second housing so that the sealing element can seal the gap between the first housing and the second housing;

[0069] The outer tube unit includes an outer tube and a first sealing ring. One end of the outer tube is disposed in the sealing space through the installation channel and communicates with the first interface of the pipeline assembly. The first sealing ring is disposed in the installation channel and sleeved on the outer tube.

[0070] The overall shape of the box can be a cube, cuboid, etc., without specific limitations, as long as it has a hollow interior forming a sealed space. The sealed space is used to install piping assemblies. The first and second shells can be formed by cutting the box in half or not, without specific limitations. This embodiment uses an example where the first and second shells are of similar size. The mounting channel is used for the outer tube to enter the sealed space. The mounting channel can be located in the first or second shell, or both, without specific limitations, as long as the outer tube can extend into the sealed space through the mounting channel.

[0071] The sealing element can be a sealing strip, sealing ring, etc., and the material can be silicone, rubber, etc. By placing the sealing element between the first and second housings, when the first and second housings compress the sealing element, the sealing element deforms, sealing the gap between them. The first and second housings can be connected by screws, rivets, or snap-fit ​​connections; no specific restrictions are placed, as long as the first and second housings can fit together. One end of the outer tube connects to the sleeve's pipe, and the other end extends into the sealing space through the installation channel and connects to the first interface. The sealing ring is fitted onto the outer tube and simultaneously placed in the installation channel. When the sealing ring is placed in the installation channel, its outer surface fits against the inner wall of the installation channel, and it is tightly fitted with the outer tube. This prevents water from entering the sealing space through the gap between the outer tube and the installation channel.

[0072] In some examples, such as Figure 10 and Figure 11 As shown, the sidewall of the second housing that abuts against the first housing has a first sealing groove, which extends circumferentially along the second housing. The sealing element is disposed in the first sealing groove. The first housing has a corresponding abutment protrusion extending circumferentially along the first housing, which abuts against the sealing element. The sidewall of the second housing that abuts against the first housing is located at the four periphery of the second housing. The first sealing groove is used to install the sealing element and to improve airtightness. The abutment protrusion is located at the edge of the first housing and is disposed corresponding to the first sealing groove. Thus, when the sealing element is disposed in the first sealing groove, the abutment protrusion can abut against the sealing element. The width of the abutment protrusion can be equivalent to the width of the first sealing groove, thus improving airtightness when the abutment protrusion abuts against the sealing element. In addition, the side surface with the first sealing groove and the side surface with the limited abutment protrusion are fitted together, which further improves airtightness.

[0073] In some examples, such as Figure 7 As shown, the blood pressure monitor also includes fasteners and a second sealing ring;

[0074] The second housing has a through hole and a second sealing groove. The second sealing groove is opened on the outside of the second housing, and the through hole is opened at the bottom of the second sealing groove. The through hole penetrates the inner side of the second housing.

[0075] The first housing has a fixing hole corresponding to the through hole, the second sealing ring is disposed in the second sealing groove, and one end of the fastener passes through the second sealing ring and the through hole and is connected to the fixing hole.

[0076] Fasteners can be screws, bolts, etc., with no specific limitations. The second sealing ring can be a silicone ring, rubber ring, etc. The second sealing groove is used to house the second sealing ring, preventing it from being located outside the housing surface and from coming into contact with foreign objects. The through hole allows one end of the fastener to enter the interior of the second housing. The fixing hole is located on the inner side of the first housing and directly opposite the through hole. The fixing hole can have internal threads or a nut, etc., and is used to connect the end of the fastener that enters the interior of the second housing. The second sealing ring and the fastener fit tightly together, thus improving the sealing performance between them. Because the second sealing ring is located in the second sealing groove, when the fastener connects the first and second housings, the second sealing ring can seal the gap between the fastener and the second housing, preventing external water from entering the sealing space through the through hole. In addition, it should be noted that an assembly groove is also provided on the outer side of the second housing, and the second sealing groove is located at the bottom of the assembly groove. Thus, when the fastener is located in the through hole, the end of the fastener away from the fixing hole can enter the assembly groove.

[0077] In some examples, such as Figures 8 to 12 As shown, a first mounting cavity is provided on the side wall where the first housing abuts against the second housing, and the first mounting cavity connects the internal space of the first housing with the external space of the first housing;

[0078] The sidewall of the second housing that abuts against the first housing has a second mounting cavity. The second mounting cavity connects the internal space of the second housing with the external space of the second housing. The first mounting cavity and the second mounting cavity are correspondingly arranged so that the first mounting cavity and the second mounting cavity enclose and form the mounting channel. The arrangement of the first mounting cavity and the second mounting cavity is beneficial for installing the outer tube.

[0079] The first mounting cavity has a first limiting groove corresponding to the first sealing ring, and the second mounting cavity has a second limiting groove corresponding to the first sealing ring. The first limiting groove and the second limiting groove enclose a limiting space. The first sealing ring is disposed in the limiting space. Due to the setting of the limiting space, when the first sealing ring is disposed in the limiting space, the contact area between the first sealing ring and the limiting space is increased, thus improving the sealing performance. At the same time, due to the setting of the limiting space, the stability of the first sealing ring is improved.

[0080] In some examples, such as Figure 3 , Figure 11 and Figure 13 As shown, the blood pressure monitor also includes a button and a control switch. The button includes a pressing part, an elastic part and a sealing part. The elastic part is disposed on one side of the pressing part and extends circumferentially along the pressing part. The sealing part is disposed at the end of the elastic part away from the pressing part, and the sealing part is disposed at an angle to the elastic part.

[0081] The first housing includes a housing body and a pressing plate. The housing body has a first mounting groove that extends through the inner and outer sides of the housing body. The button is disposed in the first mounting groove. The pressing plate has a clearance hole. The pressing plate is disposed on the inner side of the housing body. The side of the pressing plate facing the housing body fits against the side of the sealing part that is away from the housing body. The clearance hole is provided corresponding to the pressing part.

[0082] The control switch is located in the sealed space and is positioned corresponding to the pressing part.

[0083] The button is used to abut against the control switch inside the blood pressure monitor, which is electrically connected to the monitor's control circuit. The pressing part can be made of plastic, metal, etc. The elastic part is used for deformation when pressed. The elastic part can be made of elastic plastics such as silicone or rubber. The elastic part can be hollow cylindrical or hollow frustum-shaped. When the elastic part is cylindrical, it can have pleats along the axial direction to facilitate deformation. The elastic part is located on one side of the pressing part, and its hollow portion corresponds to the center of the pressing part, thus avoiding the pressing part. The sealing part can be made of elastic materials such as silicone or rubber. The sealing part seals the gap between the housing body and the pressing plate. The sealing part can be annular, fitted onto the end of the elastic part away from the pressing part, and fixedly connected to it. The pressing part, elastic part, and sealing part are integrally molded to improve sealing performance.

[0084] In some examples, such as Figure 11 As shown, a second mounting groove is also provided on the inner side of the shell body. The first mounting groove is provided at the bottom of the second mounting groove, and the side of the sealing part facing the second mounting groove is in contact with the groove wall of the second mounting groove.

[0085] The depth of the second mounting groove is slightly less than the thickness of the sealing part. This allows the sealing part to be easily pressed by the pressure plate when positioned in the second mounting groove, ensuring a better fit between the sealing part and the pressure plate and the housing body. The pressure plate is connected to the housing body and located inside the housing body. The connection method can be screw connection, adhesive bonding, riveting, etc.

[0086] In some examples, such as Figure 3 and Figure 13 As shown, the sealing part has a sealing rib on the side opposite to the pressing plate, the sealing rib extends circumferentially along the sealing part, and the sealing rib abuts against the pressing plate.

[0087] The sealing ribs are used to further improve airtightness. Because the sealing part is made of an elastic material, the sealing effect is further improved through the elastic deformation of the sealing ribs when they abut against the wall of the second mounting groove. Additionally, there can be two sealing ribs, located on opposite sides of the sealing part, with the rib facing away from the second mounting groove abutting against the pressing plate.

[0088] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A tubing assembly for a blood pressure monitor, characterized in that, The piping assembly includes: A connector having an internal air passage and a first interface, a second interface, a third interface and a fourth interface connecting the air passage to the outside, wherein the first interface is configured to communicate with the outer pipe of the pipeline. A first pressure sensor is used to detect the air pressure in the pipeline, and the first pressure sensor is connected to the second interface. A first solenoid valve is used to discharge gas in the pipeline to the external space, and the first solenoid valve is connected to the third interface. An air pump, which is connected to the fourth interface.

2. The tubing assembly of the blood pressure monitor as described in claim 1, characterized in that, The connector also has a fifth interface and a sixth interface, both of which are connected to the air passage; The piping assembly also includes a second pressure sensor and a second solenoid valve. The second pressure sensor is connected to the fifth interface, and the second solenoid valve is connected to the sixth interface.

3. The tubing assembly of the blood pressure monitor as described in claim 2, characterized in that, The connector is a six-way silicone tube.

4. A blood pressure monitor, characterized in that, The blood pressure monitor includes a housing, a sealing element, an outer tube unit, and a tubing assembly as claimed in any one of claims 1 to 3; The box has a sealed space and an installation channel connecting the sealed space with the external space. The box includes a first shell and a second shell, which are closed relative to each other to form the sealed space. The sealed space is used to install pipeline assemblies. The sealing element is disposed between the first housing and the second housing so that the sealing element can seal the gap between the first housing and the second housing; The outer tube unit includes an outer tube and a first sealing ring. One end of the outer tube is disposed in the sealing space through the installation channel and communicates with the first interface of the pipeline assembly. The first sealing ring is disposed in the installation channel and sleeved on the outer tube.

5. The blood pressure monitor as described in claim 4, characterized in that, The second housing has a first sealing groove on the side wall that abuts against the first housing. The first sealing groove extends circumferentially along the second housing, and the sealing element is disposed in the first sealing groove. The first housing has a corresponding abutment protrusion that extends along the circumference of the first housing and abuts against the seal.

6. The blood pressure monitor as described in claim 5, characterized in that, The blood pressure monitor also includes fasteners and a second sealing ring; The second housing has a through hole and a second sealing groove. The second sealing groove is opened on the outside of the second housing, and the through hole is opened at the bottom of the second sealing groove. The through hole penetrates the inner side of the second housing. The first housing has a fixing hole corresponding to the through hole, the second sealing ring is disposed in the second sealing groove, and one end of the fastener passes through the second sealing ring and the through hole and is connected to the fixing hole.

7. The blood pressure monitor as described in claim 4, characterized in that, A first mounting cavity is provided on the side wall where the first housing abuts against the second housing, and the first mounting cavity connects the internal space of the first housing with the external space of the first housing; The side wall of the second housing that abuts against the first housing has a second mounting cavity. The second mounting cavity connects the internal space of the second housing with the external space of the second housing. The first mounting cavity and the second mounting cavity are correspondingly arranged so that the first mounting cavity and the second mounting cavity enclose each other to form the mounting channel.

8. The blood pressure monitor as described in claim 4, characterized in that, The blood pressure monitor also includes a button and a control switch. The button includes a pressing part, an elastic part and a sealing part. The elastic part is disposed on one side of the pressing part and extends circumferentially along the pressing part. The sealing part is disposed at the end of the elastic part away from the pressing part, and the sealing part is disposed at an angle to the elastic part. The first housing includes a housing body and a pressing plate. The housing body has a first mounting groove that extends through the inner and outer sides of the housing body. The button is disposed in the first mounting groove. The pressing plate has a clearance hole. The pressing plate is disposed on the inner side of the housing body. The side of the pressing plate facing the housing body fits against the side of the sealing part that is away from the housing body. The clearance hole is provided corresponding to the pressing part. The control switch is located in the sealed space and is positioned corresponding to the pressing part.

9. The blood pressure monitor as described in claim 8, characterized in that, The inner side of the shell body is also provided with a second mounting groove, the first mounting groove is opened at the bottom of the second mounting groove, and the side of the sealing part facing the second mounting groove is in contact with the groove wall of the second mounting groove.

10. The blood pressure monitor as claimed in claim 8, characterized in that, The sealing part has a sealing rib on the side opposite to the pressing plate. The sealing rib extends circumferentially along the sealing part and abuts against the pressing plate.

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