Linear exhaust valve and electronic sphygmomanometer

Abstract

The utility model belongs to the technical field of exhaust valves, and particularly provides a linear exhaust valve and an electronic sphygmomanometer. The linear exhaust valve comprises a valve body, a valve element assembly and a coil; an air inlet channel and an exhaust channel which are communicated with each other are arranged in the valve body, and the two channels form an intersection opening in the valve body. The valve element assembly specifically comprises an elastic sealing piece and a magnetic piece, and the elastic sealing piece is provided with a containing cavity used for containing the magnetic piece. The end face of one side of the elastic sealing piece is provided with a sealing protrusion matched with the intersection opening, and the sealing protrusion is used for controlling the on-off state between the air inlet channel and the exhaust channel. The coil is used for generating a magnetic field acting on the magnetic part. The magnetic part is partially located in the action range of a magnetic field generated by the coil. When the coil is powered on, generated magnetic field force drives the magnetic piece to drive the sealing protrusion to move in the axial direction of the intersection opening. The magnetic field intensity can be adjusted by controlling the current intensity of the coil, the depth of the sealing protrusion extending into the intersection opening is further controlled, and continuous and accurate adjustment of the gas flow is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of exhaust valves, and particularly relates to a linear exhaust valve and an electronic sphygmomanometer. BACKGROUND

[0002] As a convenient and accurate medical measurement device, the electronic sphygmomanometer has gradually replaced the traditional mercury sphygmomanometer in clinical and home use. This development trend is due to the adoption of advanced linear valve technology by modern electronic sphygmomanometers, which enables the device to achieve higher precision pressure control and measurement, thereby providing more reliable blood pressure data for users. Due to structural limitations, traditional mechanical valves are difficult to achieve precise control of pressure changes. Therefore, modern electronic sphygmomanometers adopt linear valve technology, which precisely controls the valve opening degree through electrical signals to achieve continuous adjustment of gas flow, which not only significantly improves the dynamic response characteristics of pressure control, but also ensures the accuracy and repeatability of blood pressure measurement results.

[0003] However, the linear valve structure design in the prior art is usually complex, containing multiple precisely matched structural components. This complexity not only increases the manufacturing cost, but also causes the device to be prone to failure during use, affecting the reliability and service life of the sphygmomanometer. CONTENT OF THE INVENTION

[0004] The purpose of the present application is to provide a linear exhaust valve and an electronic sphygmomanometer, aiming to solve the technical problem of complex structure and high failure rate of the linear exhaust valve in the prior art electronic sphygmomanometer.

[0005] The technical solution adopted by the present application is:

[0006] A linear exhaust valve is provided, comprising:

[0007] a valve body having an air inlet channel and an exhaust channel;

[0008] a valve core assembly comprising an elastic sealing member and a magnetic member arranged in the valve body, the elastic sealing member having a storage cavity therein, and the magnetic member being arranged in the storage cavity; a sealing protrusion is further arranged on the elastic sealing member;

[0009] a coil for generating a magnetic field attracting the magnetic member, the magnetic member being at least partially located in the magnetic field formed by the coil to drive the sealing protrusion to extend into the intersection of the air inlet channel and the exhaust channel, and to control the length of the sealing protrusion extending into the intersection according to the magnetic field strength generated by the coil, so as to control the opening degree of the intersection.

[0010] As a further improvement of the above technical solution:

[0011] Optionally, the linear exhaust valve further comprises a magnetic conducting member installed in the valve body, the magnetic conducting member has a coil slot and a vent hole, the coil is arranged in the coil slot, one end of the vent hole is communicated with the air inlet channel, and the other end of the vent hole is a converging port.

[0012] Optionally, the elastic sealing member comprises an outer ring support portion, an elastic connecting portion and a sealing cover plate portion, the outer ring support portion is supported in the valve body, the sealing cover plate portion is arranged opposite to the magnetic conducting member, the storage cavity is arranged in the sealing cover plate portion, the sealing protrusion is arranged on one side of the sealing cover plate portion close to the magnetic conducting member, one end of the elastic connecting portion is connected to the outer ring support portion, and the other end of the elastic connecting portion is connected to the sealing cover plate portion.

[0013] Optionally, the sealing protrusion is a tapered protrusion, a small end of the tapered protrusion protrudes from the sealing cover plate portion, and a large end of the tapered protrusion is connected to the sealing cover plate portion.

[0014] Optionally, the magnetic member is an armature plate, and the armature plate is attracted when the coil is electrified to press the sealing cover plate portion against the magnetic conducting member.

[0015] Optionally, the number of the exhaust channels is at least one, each of the exhaust channels extends along the radial direction of the elastic sealing member, and the exhaust ports of the exhaust channels are arranged on the side wall of the valve body.

[0016] Optionally, the linear exhaust valve further comprises a conductive terminal, the conductive terminal is connected to the valve body and is electrically connected to the coil.

[0017] Optionally, the valve body further comprises a wire slot, the lead wire of the coil penetrates through the wire slot and is electrically connected to the conductive terminal.

[0018] Optionally, the valve body further comprises a gas nozzle and a gas nozzle groove, the gas nozzle is arranged in the gas nozzle groove and is communicated with the air inlet channel, and the gas nozzle partially protrudes from the valve body.

[0019] The application further provides an electronic sphygmomanometer, which comprises a gas supply device, a cuff and the linear exhaust valve, the air inlet channel of the linear exhaust valve is connected to the air outlet end of the gas supply device, and the exhaust channel of the linear exhaust valve is communicated with the inflation cavity of the cuff.

[0020] Compared with the prior art, the electronic sphygmomanometer provided by the application has the following beneficial effects:

[0021] The linear exhaust valve provided by the application comprises a valve body, a valve core assembly and a coil. The valve body is internally provided with an air inlet channel and an exhaust channel which are in communication with each other and form a meeting port in the valve body. The valve core assembly specifically comprises an elastic sealing member and a magnetic member, wherein the elastic sealing member is provided with a storage cavity for accommodating the magnetic member. The elastic sealing member is provided on one side end face with a sealing protrusion which is matched with the meeting port and is used for controlling the on-off state between the air inlet channel and the exhaust channel. The coil is used for generating a magnetic field acting on the magnetic member. The magnetic member is at least partially located in the magnetic field acting range of the coil. When the coil is electrified, the magnetic field force generated by the coil drives the magnetic member to move the sealing protrusion along the axial direction of the meeting port. By controlling the current intensity of the coil, the magnetic field intensity can be adjusted, the depth of the sealing protrusion extending into the meeting port is controlled, and finally the continuous and accurate adjustment of the gas flow is realized.

[0022] The linear exhaust valve provided by the application wraps the magnetic member in the interior of the elastic sealing member, thereby avoiding the direct contact between the magnetic member and the coil, effectively eliminating the problem of the decline of the control accuracy caused by the magnetic hysteresis effect in the traditional structure. In addition, when the coil attracts the magnetic member to make the elastic sealing member contact the coil, the material characteristics of the elastic sealing member can play a lubricating effect, reduce the friction resistance between the magnetic member and the coil, and help to respond to the change of the electric signal more quickly. Compared with the prior art, the linear exhaust valve provided by the application optimizes the matching relationship between the valve core assembly and the coil, not only simplifies the overall structure, improves the reliability, but also realizes the accurate control of the gas flow. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Figure 1 The cross-sectional structure schematic diagram of the linear exhaust valve provided by the embodiments of the application is shown in the figure.

[0025] Figure 2 The partial enlarged structure schematic diagram in the figure is shown in the figure. Figure 1

[0026] Figure 3 The front view structure schematic diagram of the linear exhaust valve provided by the embodiments of the application is shown in the figure.

[0027] Figure 4 The side view structure schematic diagram of the linear exhaust valve provided by the embodiments of the application is shown in the figure.

[0028] Figure 5 ​A perspective structural schematic view of a linear exhaust valve provided by an embodiment of the present application.

[0029] In the drawings, various elements are labeled the same as in the description of the present application.

[0030] 1. Valve body; 11. Inlet passage; 12. Exhaust passage; 13. Air nozzle; 14. Air nozzle groove;

[0031] 2. Valve core assembly; 21. Elastic sealing member; 211. Sealing protrusion; 212. Outer ring support part; 213. Elastic connecting part; 214. Sealing cover plate part; 22. Magnetic member;

[0032] 3. Coil;

[0033] 4. Magnetic conducting member; 41. Coil slot; 42. Vent hole;

[0034] 5. Conductive terminal;

[0035] 6. Wire placement slot. DETAILED DESCRIPTION

[0036] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0037] In the description of the present application, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In this invention, unless otherwise explicitly 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 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 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.

[0041] 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 cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of this utility model.

[0042] In the following description, suffixes such as "module," "part," "component," or "unit" are used only for the purpose of describing this utility model and have no specific meaning in themselves. Therefore, they can be used in combination.

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0044] To simplify the structure of the linear exhaust valve and reduce the failure rate; such as Figure 1 and Figure 2 As shown, this application provides a linear exhaust valve, the structure of which includes a valve body 1, a valve core assembly 2, and a coil 3. The valve body 1 has an internally connected intake channel 11 and an exhaust channel 12, which converge at a junction within the valve body 1. The valve core assembly 2 specifically includes an elastic seal 21 and a magnetic element 22, wherein the elastic seal 21 is made of an elastic material such as rubber or silicone, and has an internal cavity for accommodating the magnetic element 22. A sealing protrusion 211, adapted to the junction, is provided on one end face of the elastic seal 21, which controls the on / off state between the intake channel 11 and the exhaust channel 12.

[0045] The coil 3 is arranged at a specific position of the valve body 1 and is used to generate a magnetic field acting on the magnetic element 22. The magnetic element 22 is at least partially located in the magnetic field generated by the coil 3. When the coil 3 is energized, the magnetic field generated drives the magnetic element 22 to move the sealing protrusion 211 along the axis of the intersection. By controlling the current intensity of the coil 3, the magnetic field intensity can be adjusted, thereby controlling the depth of the sealing protrusion 211 into the intersection, and finally achieving continuous and accurate adjustment of the gas flow.

[0046] The linear exhaust valve of the present application covers the magnetic element 22 inside the elastic sealing element 21, thereby avoiding direct contact between the magnetic element 22 and the coil 3, effectively eliminating the problem of reduced control accuracy caused by the magnetic hysteresis effect in the traditional structure. Secondly, when the coil 3 attracts the magnetic element 22 to make the elastic sealing element 21 contact the coil 3, the material properties of the elastic sealing element 21 can play a lubricating role, reducing the frictional resistance between the magnetic element 22 and the coil 3, which helps to respond faster to changes in the electrical signal.

[0047] Compared with the prior art, the linear exhaust valve of the present application optimizes the cooperation between the valve core assembly 2 and the coil 3, not only simplifying the overall structure and improving the reliability, but also achieving accurate control of the gas flow.

[0048] As shown in Figure 1 and Figure 2 , in one specific embodiment of the present application, the linear exhaust valve further comprises a magnetic conducting element 4 installed inside the valve body 1. The magnetic conducting element 4 is preferably a core or the like, and has a coil slot 41 and an air passage 42 arranged thereon. The coil slot 41 is an annular groove structure for accommodating and fixing the coil 3; the air passage 42 is an axial through hole penetrating the magnetic conducting element 4, one end of which is in communication with the air inlet passage 11 of the valve body 1, and the other end is the intersection of the air inlet passage 11 and the air outlet passage 12. The magnetic conducting element 4 can be used to optimize the magnetic circuit, so that the magnetic field generated by the coil 3 can be efficiently conducted to the magnetic element 22 through the magnetic conducting element 4, thereby enhancing the driving force of the valve core assembly 2.

[0049] As shown in Figure 1 and Figure 2 , in one specific embodiment of the present application, the elastic sealing element 21 adopts an integrated structure design, mainly including an outer ring support part 212, an elastic connecting part 213 and a sealing cover plate part 214. The outer ring support part 212 is supported on the inner wall of the valve body 1; the sealing cover plate part 214 is arranged opposite to the magnetic conducting element 4, and the inside of the sealing cover plate part 214 is provided with a storage cavity for accommodating the magnetic element 22, and the side of the sealing cover plate part 214 facing the magnetic conducting element 4 is provided with the sealing protrusion 211. One end of the elastic connecting part 213 is connected with the outer ring support part 212, and the other end is connected with the sealing cover plate part 214, so that in the initial state, the sealing cover plate part 214 maintains a predetermined distance from the intersection.

[0050] When the coil 3 is powered, the magnetic conducting piece 4 cooperates with the coil 3 to generate a magnetic field, which attracts the magnetic piece 22 to drive the sealing cover plate part 214 to move towards the magnetic conducting piece 4. At this time, the elastic connecting part 213 is elastically deformed, and the sealing protrusion 211 extends into the intersection, until the sealing cover plate part 214 is pressed against the surface of the magnetic conducting piece 4. In this process, the close fit of the sealing cover plate part 214 and the magnetic conducting piece 4 can also enhance the sealing effect of the airflow passage. When the coil 3 is powered off, the elastic connecting part 213 resets the sealing cover plate part 214 by its elasticity, and the sealing protrusion 211 is separated from the intersection, restoring the communication state of the airflow passage.

[0051] As shown in Figure 1 and Figure 2 , in one specific embodiment of the present application, the sealing protrusion 211 adopts a tapered structure. Specifically, the large end of the tapered protrusion is integrally connected with the sealing cover plate part 214 to ensure structural strength and sealing reliability; the small end of the tapered protrusion protrudes axially from the surface of the sealing cover plate part 214. The slope design of the tapered structure enables the sealing protrusion 211 to achieve gradual sealing contact during the pressing process, which is conducive to improving the accuracy and reliability of the sealing fit.

[0052] When the valve core assembly 2 is in a working state, the small end of the tapered protrusion first extends into the intersection and gradually reduces the flowable area of the intersection; as the magnetic attraction force increases, the tapered slope gradually seals the entire circumference of the intersection.

[0053] As shown in Figure 1 and Figure 2 , in one specific embodiment of the present application, the magnetic piece 22 adopts an armature piece. When the coil 3 is powered, the electromagnetic field formed through the magnetic conducting piece 4 forms a closed magnetic circuit, which generates an axial attractive force on the armature piece. This attractive force drives the sealing cover plate part 214 to move towards the magnetic conducting piece 4 as a whole, so that the sealing protrusion 211 gradually extends into the intersection to gradually reduce the flowable area of the intersection, until it is completely pressed and sealed. When the coil 3 is powered off, the electromagnetic force disappears, and the restoring force of the elastic connecting part 213 resets the sealing cover plate part 214 and the armature piece, releasing the sealing state.

[0054] As shown in Figure 1 and Figure 2 , in one specific embodiment of the present application, the valve body 1 is provided with at least one exhaust passage 12, which is arranged along the radial direction of the elastic sealing piece 21. The air inlet end of the exhaust passage 12 is in communication with the intersection, and the exhaust end is arranged on the side wall of the valve body 1. A plurality of exhaust passages 12 can be uniformly distributed circumferentially along the valve body 1.

[0055] As shown in Figures 3 to 5As shown, in one specific embodiment of this application, the linear exhaust valve is further provided with a conductive terminal 5, which is fixedly installed on the outer surface of the valve body 1 and forms a reliable electrical connection with the coil 3 through a wire. The conductive terminal 5 can be connected to an external power source to provide a stable current input for the operation of the coil 3.

[0056] like Figures 3 to 5 As shown, in one specific embodiment of this application, the valve body 1 is further provided with a wire placement groove 6. After the lead wire of the coil 3 is led out from the coil groove 41, it is arranged along the direction of the wire placement groove 6 and finally wound and fixed to the wiring end of the conductive terminal 5 to complete the electrical connection. The depth and width of the wire placement groove 6 must ensure that the lead wire can be completely accommodated therein to avoid external mechanical damage.

[0057] like Figures 3 to 5 As shown, in one specific embodiment of this application, the valve body 1 further includes an air nozzle 13 and an air nozzle groove 14. The air nozzle groove 14 is an annular cavity structure, and its axis is coaxially arranged with the air inlet channel 11. The air nozzle 13 is disposed in the air nozzle groove 14, and its inner hole forms a continuous airflow channel with the air inlet channel 11. The end portion of the air nozzle 13 extends to the outer surface of the valve body 1. The recessed structure of the air nozzle groove 14 is beneficial to improving the structural strength during mold forming and extending the service life of the mold; secondly, the air nozzle groove 14 provides protection for the air nozzle 13, effectively reducing the risk of external collision and improving the overall durability of the product.

[0058] like Figure 1 As shown, in a specific embodiment of this application, the valve body 1 specifically includes a first valve body and a second valve body. The second valve body and the first valve body are detachably connected by fasteners, and the first valve body and the second valve body cooperate to form a receiving cavity, in which the valve core assembly 2, the coil 3, and the magnetic conductive element 4 are all disposed.

[0059] This application also provides an electronic blood pressure monitor, including an air supply device (not shown), a cuff (not shown), and the linear exhaust valve described in the above embodiments. The air inlet channel 11 of the linear exhaust valve is connected to the air outlet end of the air supply device, and the exhaust channel 12 of the linear exhaust valve communicates with the inflation chamber of the cuff. Since this electronic blood pressure monitor has the linear exhaust valve described in the above embodiments, it also possesses the advantages of the linear exhaust valve described in the above embodiments.

[0060] It should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A linear vent valve characterized by, The application relates to a valve body (1) with an air inlet channel (11) and an air outlet channel (12), a valve core assembly (2) with an elastic sealing member (21) and a magnetic member (22) arranged in the valve body (1), the elastic sealing member (21) having a storage cavity, the magnetic member (22) being arranged in the storage cavity, a sealing protrusion (211) being further arranged on the elastic sealing member (21), a coil (3) for generating a magnetic field to attract the magnetic member (22), the magnetic member (22) being at least partially located in the magnetic field formed by the coil (3) to drive the sealing protrusion (211) to extend into the intersection of the air inlet channel (11) and the air outlet channel (12) and control the length of the sealing protrusion (211) extending into the intersection according to the magnetic field intensity generated by the coil (3) to control the opening degree of the intersection. The valve body (1) is further provided with a magnetic conducting member (4) arranged in the valve body (1), the magnetic conducting member (4) having a coil slot (41) and a ventilation hole (42), the coil (3) being arranged in the coil slot (41), one end of the ventilation hole (42) being communicated with the air inlet channel (11) and the other end of the ventilation hole (42) being the intersection. The elastic sealing member (21) comprises an outer ring supporting portion (212), an elastic connecting portion (213) and a sealing cover plate portion (214), the outer ring supporting portion (212) being supported in the valve body (1), the sealing cover plate portion (214) being arranged opposite to the magnetic conducting member (4), the storage cavity being arranged in the sealing cover plate portion (214), the sealing protrusion (211) being arranged on one side of the sealing cover plate portion (214) close to the magnetic conducting member (4), one end of the elastic connecting portion (213) being connected to the outer ring supporting portion (212) and the other end of the elastic connecting portion (213) being connected to the sealing cover plate portion (214). The sealing protrusion (211) is a conical protrusion, the small end of the conical protrusion being protruded from the sealing cover plate portion (214) and the large end of the conical protrusion being connected to the sealing cover plate portion (214).

2. The linear vent valve of claim 1, wherein: The magnetic member (22) is an armature plate, the armature plate being attracted to the magnetic conducting member (4) when the coil (3) is electrified to press the sealing cover plate portion (214) against the magnetic conducting member (4).

3. The linear vent valve of claim 2, wherein: The number of the air outlet channels (12) is at least one, each air outlet channel (12) extending along the radial direction of the elastic sealing member (21), and the air outlet of the air outlet channel (12) being arranged on the side wall of the valve body (1).

4. The linear vent valve of claim 3, wherein: The valve body (1) is further provided with an electrically conductive terminal (5) connected to the valve body (1) and electrically connected to the coil (3).

5. The linear vent valve of claim 2, wherein: The valve body (1) is further provided with a wire slot (6), the lead wire of the coil (3) being penetrated through the wire slot (6) and then electrically connected to the electrically conductive terminal (5).

6. The linear vent valve according to any one of claims 1 to 5, wherein: ​ 7. The linear vent valve according to any one of claims 1 to 5, wherein: ​ 8. The linear vent valve of claim 7, wherein: ​ 9. The linear vent valve according to any one of claims 1 to 5, wherein: The valve body (1) further comprises a gas nozzle (13) and a gas nozzle groove (14), the gas nozzle (13) is arranged in the gas nozzle groove (14) and communicates with the gas inlet channel (11), and the gas nozzle (13) partially protrudes from the valve body (1).

10. An electronic sphygmomanometer characterized by comprising: The linear exhaust valve according to any one of claims 1 to 9, wherein the linear exhaust valve is connected to a gas outlet end of a gas supply device, and the exhaust channel (12) of the linear exhaust valve communicates with a gas-filled cavity of a sleeve.

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