Solenoid valve and wearable device

Abstract

A solenoid valve (4015, 500, 600) and a wearable device. The solenoid valve (4015, 500, 600) includes a housing (1), an electromagnetic component (2), a valve core assembly (4), and a reset component (3); the electromagnetic component (2) includes a yoke (21) and a coil (22), the yoke (21) is provided with a second medium flow channel (72) and a first receiving space (213) for receiving the coil (22); the electromagnetic component (2) and the housing (1) are fastened together to form a receiving cavity for receiving the valve core assembly (4) and the reset component (3); the valve core assembly (4) is disposed between the electromagnetic component (2) and the housing (1); the reset component (3) is disposed on the side of the valve core assembly (4) facing the electromagnetic component (2) and / or away from the electromagnetic component (2). The housing (1) and the magnetic yoke (21) are respectively provided with a first medium flow channel (71) and a second medium flow channel (72). The electromagnetic component (2) and the reset component (3) are used to drive the valve core component (4) to move when the coil (22) is energized and de-energized, so that the first medium flow channel (71) and the second medium flow channel (72) are connected or disconnected. The above technical solution can reduce the volume of the solenoid valves (4015, 500, 600), thereby adapting to the space requirements of electronic equipment, realizing the miniaturization of electronic equipment, and also improving the sealing performance of the solenoid valves (4015, 500, 600).

Description

[0001] This application claims priority to Chinese Patent Application No. 202310532060.7, filed on May 11, 2023, entitled "Solenoid Valve and Wearable Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of electronic device technology, and more specifically, to a solenoid valve and a wearable device. Background Technology

[0003] Blood pressure is an important physiological indicator for monitoring human health, reflecting the body's overall health status. Electronic blood pressure monitors are medical devices that measure blood pressure using electronic technology and the principle of indirect blood pressure measurement. The miniaturization of electronic blood pressure monitors increases their portability, making them suitable for home use and meeting the daily blood pressure measurement needs of families.

[0004] As living standards continue to improve, people are paying more and more attention to their own health and demand the ability to dynamically measure blood pressure anytime and anywhere. Therefore, miniaturization and wearability have become the development trend of electronic blood pressure monitors.

[0005] Electronic blood pressure monitors typically measure blood pressure by inflating and deflating an air bladder. The solenoid valve is a crucial component in electronic blood pressure monitors, controlling the flow of air. In existing electronic blood pressure monitors, to meet sealing requirements, the solenoid valves are relatively large, making it difficult to meet the space constraints of miniaturized and wearable electronic blood pressure monitors. Summary of the Invention

[0006] This application provides a solenoid valve and a wearable device that can simplify the structure of the solenoid valve and achieve miniaturization of the solenoid valve.

[0007] In a first aspect, a solenoid valve is provided, comprising: a housing having a first medium flow channel thereon; an electromagnetic assembly including a yoke and a coil, the yoke having a second medium flow channel and a first receiving space spaced apart, the coil being housed in the first receiving space, the electromagnetic assembly being engaged with the housing to form a receiving cavity; a valve core assembly housed in the receiving cavity, the valve core assembly being disposed between the electromagnetic assembly and the housing; and a reset assembly housed in the receiving cavity, the reset assembly being disposed on the side of the valve core assembly facing the electromagnetic assembly and / or the side of the valve core assembly away from the electromagnetic assembly; wherein the electromagnetic assembly is used to drive the valve core assembly to move when the coil is energized, and the reset assembly is used to drive the valve core assembly to move when the coil is de-energized, so as to connect or disconnect the first medium flow channel from the second medium flow channel.

[0008] In this embodiment, the magnetic yoke actually serves as part of the solenoid valve's housing. The engagement of the electromagnetic assembly, including the yoke, with the housing creates a space to accommodate other components, simplifying the solenoid valve and reducing its overall size. This adapts to the space requirements of electronic devices, enabling miniaturization. Furthermore, the media flow channel is located on both the housing and the yoke, facilitating an overall seal and improving the solenoid valve's airtightness. Consequently, its corrosion resistance and reliability are also enhanced.

[0009] In conjunction with the first aspect, in one possible implementation, the housing has a first groove on the side facing the yoke; the yoke includes a first body and a protrusion protruding from the surface of the first body, the first body is connected to the housing, a first receiving space is provided on the protrusion, and the protrusion is received in the first groove.

[0010] The solenoid valve provided in this application has a simple structure and streamlined components, making the manufacturing process simpler and more reliable. It can improve the dimensional accuracy of the internal components of the solenoid valve, reduce the assembly difficulty of the solenoid valve, and improve the yield.

[0011] Furthermore, the first accommodating space for the coil is provided on the magnetic yoke, enabling a single component to enclose the coil. This eliminates the need for the magnetic yoke to cooperate with other components to form a mounting slot for the coil, facilitating coil installation, reducing the assembly difficulty of the solenoid valve, effectively saving space and promoting the miniaturization or micro-miniaturization of the solenoid valve. It also helps to form an integral seal, improving the sealing performance of the solenoid valve. In addition, the magnetic yoke can transmit the magnetic lines of force generated by the energized coil to the required location, thereby forming a magnetic field where needed and reducing magnetic leakage.

[0012] In conjunction with the first aspect, in one possible implementation, the first medium channel is connected to the first groove; the second medium channel is connected to the first groove.

[0013] The first medium flow channel and the second medium flow channel are respectively disposed on the housing and the magnetic yoke, and the first medium flow channel and the second medium flow channel can be connected through the space formed by the housing and the electromagnetic component after they are fastened together. Since the receiving cavity is formed by the connection between the housing and the electromagnetic component, there are fewer sealing interfaces, which improves the reliability of the seal. Therefore, the sealing performance of the entire passage is good.

[0014] In conjunction with the first aspect, in one possible implementation, the first medium flow channel includes a first opening and a second opening, the first opening being disposed on the bottom wall or side wall of the first groove, and the second opening being disposed on the outer wall of the housing; and / or the second medium flow channel includes a third opening and a fourth opening, the third opening being disposed on the surface protruding towards the bottom wall of the first groove, and the fourth opening being disposed on the surface of the first body away from the bottom wall of the first groove.

[0015] The complete first medium flow channel is formed by the housing as a single component, which can improve the sealing performance of the pipeline in the solenoid valve and simplify the assembly process.

[0016] The complete second medium flow channel is formed by the single component of the magnetic yoke, which can improve the sealing performance of the pipeline in the solenoid valve and simplify the assembly process.

[0017] In conjunction with the first aspect, in one possible implementation, the centerline of the first medium flow channel is a straight line; and / or the centerline of the second medium flow channel is a straight line.

[0018] In this way, the resistance of the first or second medium flow channel to the working medium (such as gas or liquid) of the solenoid valve is small, which allows the working medium to pass smoothly through the first and second medium flow channels, improving the response speed and pressure relief efficiency of the solenoid valve and reducing the pressure relief time.

[0019] In conjunction with the first aspect, in one possible implementation, the centerline of the first medium flow channel coincides with the centerline of the second medium flow channel.

[0020] In this way, during pressure relief, the working medium of the solenoid valve can smoothly flow from the inlet to the outlet of the solenoid valve, with a short flow distance and low resistance, thereby improving the response speed and pressure relief efficiency of the solenoid valve and reducing the pressure relief time.

[0021] In conjunction with the first aspect, in one possible implementation, the first accommodating space is arranged around the second medium flow channel.

[0022] This makes it convenient to design a space on the yoke to accommodate the coil (i.e., the first accommodating space) and a second medium flow channel.

[0023] In conjunction with the first aspect, in one possible implementation, the protrusion includes a first protrusion and a second protrusion, the second protrusion being disposed around the first protrusion, and a first receiving space being formed between the first protrusion and the second protrusion.

[0024] Such a magnetic yoke is simple to manufacture and the coil is easy to install. In addition, when a single coil is placed in this first accommodating space, the circuit connection and wiring layout can be simplified.

[0025] In conjunction with the first aspect, in one possible implementation, the opening of the second medium flow channel near the valve core assembly is disposed on the surface of the first protrusion facing the bottom wall of the first groove.

[0026] In this way, the opening of the second medium flow channel near the valve core assembly is basically in the middle position, the force on the valve core assembly is more uniform, and the sealing effect of the valve core assembly can be improved.

[0027] In conjunction with the first aspect, in one possible implementation, the reset assembly includes an elastic element sleeved on the protrusion, one end of the elastic element abutting against the valve core assembly, and the other end of the elastic element abutting against the first body.

[0028] Elastic components have good elastic deformation capabilities, are simple to process and easy to arrange, and can provide good reliability.

[0029] In conjunction with the first aspect, in one possible implementation, the elastic element is any one of a spring, a bellows, and an elastic block.

[0030] In conjunction with the first aspect, in one possible implementation, when the coil is energized, the yoke attracts the valve core assembly, and the elastic element is in a compressed state. Under the magnetic force of the yoke and the elastic force of the elastic element, the valve core assembly abuts against the protrusion.

[0031] In conjunction with the first aspect, in one possible implementation, the reset assembly includes a magnetic element housed in a second receiving space provided on the housing. The second receiving space is close to the bottom wall of the first groove and corresponds to the position of the valve core assembly. The magnetic element and the coil are respectively disposed on both sides of the valve core assembly, and there is a magnetic attraction between the magnetic element and the valve core assembly.

[0032] The valve core assembly moves under the magnetic force of the magnetic component, which makes the force on the valve core assembly more uniform and the movement more stable, avoiding tilting and jamming.

[0033] In conjunction with the first aspect, in one possible implementation, the magnetic component is embedded in the housing via an insert injection molding process.

[0034] This integrated product design avoids the need for new sealing interfaces, thus improving the sealing performance of the solenoid valve without affecting the performance of the magnetic components.

[0035] In conjunction with the first aspect, in one possible implementation, the magnetic component is a permanent magnet or a soft magnet.

[0036] In conjunction with the first aspect, in one possible implementation, when the coil is energized, the yoke attracts the valve core assembly, and under the magnetic force of the yoke and the magnetic force of the magnetic component, the valve core assembly abuts against the protrusion.

[0037] In conjunction with the first aspect, in one possible implementation, when the coil is energized, the valve core assembly blocks the second medium flow channel; when the coil is not energized, the first medium flow channel and the second medium flow channel are connected through the first groove; or when the coil is not energized, the valve core assembly blocks the first medium flow channel; when the coil is energized, the first medium flow channel and the second medium flow channel are connected through the first groove.

[0038] In conjunction with the first aspect, in one possible implementation, the valve core assembly includes a seal and a diaphragm, the diaphragm being used to move the seal under the drive of an electromagnetic assembly or a reset assembly to block a first medium flow channel or a second medium flow channel.

[0039] In conjunction with the first aspect, in one possible implementation, the end of the seal near the first medium flow channel protrudes toward the first medium flow channel relative to the partition, and / or the end of the seal near the second medium flow channel protrudes toward the second medium flow channel relative to the partition.

[0040] The protruding portion of the seal can ensure sufficient deformation to form a good seal at the sealing point.

[0041] In conjunction with the first aspect, in one possible implementation, a second groove communicating with the second medium flow channel is provided on the side of the bottom wall of the protrusion facing the first groove, the second groove being used to receive the portion of the seal protruding toward the second medium flow channel relative to the partition; and / or a third groove communicating with the first medium flow channel is provided on the bottom wall of the first groove, the third groove being used to receive the portion of the seal protruding toward the first medium flow channel relative to the partition.

[0042] In this way, while satisfying the sealing performance of the sealing element, the thickness of the solenoid valve in the direction of engagement between the housing and the solenoid assembly can be reduced, which is conducive to the miniaturization of the solenoid valve.

[0043] In conjunction with the first aspect, in one possible implementation, the seal is used to block the first medium flow channel. When the coil is energized, the portion of the seal protruding toward the second medium flow channel relative to the partition is received in the second medium flow channel, and there is a gap between the inner wall of the second medium flow channel and the seal; or the seal is used to block the second medium flow channel. When the coil is not energized, the portion of the seal protruding toward the first medium flow channel relative to the partition is received in the first medium flow channel, and there is a gap between the inner wall of the first medium flow channel and the seal.

[0044] In this way, while ensuring that the first and second medium flow channels can be connected, the thickness of the solenoid valve in the direction of engagement between the housing and the magnetic yoke can be reduced, which is beneficial to the miniaturization of the solenoid valve.

[0045] In conjunction with the first aspect, in one possible implementation, the partition comprises a permanent magnet material or a soft magnetic material.

[0046] In conjunction with the first aspect, in one possible implementation, the partition is provided with at least one through hole for connecting the first medium flow channel and the second medium flow channel.

[0047] In conjunction with the first aspect, in one possible implementation, a protrusion is provided on the bottom wall of the first groove or the surface of the partition facing the bottom wall of the first groove, and the partition abuts against the bottom wall of the first groove through the protrusion, wherein the protrusion is misaligned with the through hole, and a gap is formed in the area between the bottom wall of the first groove and the partition where no protrusion is provided.

[0048] The gap formed between the partition and the bottom wall of the first groove due to the protrusion provides sufficient space for the flow of the working medium when the solenoid valve is in the open state, which is conducive to rapid pressure relief.

[0049] In conjunction with the first aspect, in one possible implementation, the solenoid valve further includes a dustproof component disposed in the first medium flow channel and / or the second medium flow channel of the solenoid valve.

[0050] Here, one of the first and second medium flow channels is the inlet flow channel of the solenoid valve, and the other is the outlet flow channel. That is, the dustproof component can be installed at the inlet and / or outlet flow channels of the solenoid valve. The dustproof component can prevent dust and other foreign objects from entering the solenoid valve, thus avoiding affecting its normal function.

[0051] In conjunction with the first aspect, in one possible implementation, the solenoid valve further includes an electrical connector disposed on the outer wall of the housing, and the electrical connector is electrically connected to the coil through a wiring hole provided on the magnetic yoke.

[0052] In conjunction with the first aspect, in one possible implementation, the housing is a one-piece structure, and / or the yoke is a one-piece structure. A one-piece housing and / or yoke can simplify the manufacturing process.

[0053] In conjunction with the first aspect, one possible implementation involves a sealed connection between the housing and the magnetic yoke. This facilitates achieving a complete seal for the solenoid valve.

[0054] In conjunction with the first aspect, in one possible implementation, the solenoid valve further includes a base connected to a housing or a magnetic yoke, wherein a third medium flow channel is provided on the base, and the third medium flow channel is connected to a non-outlet flow channel in the first medium flow channel and the second medium flow channel.

[0055] The base material, a single component, can form a complete third medium flow channel, which improves the sealing performance of the pipeline and simplifies assembly. Furthermore, the first, second, and third medium flow channels are all internal to the component, allowing for customized flow path designs. This eliminates the need for pipework at the solenoid valve via sleeves, resulting in a more regular shape and reduced overall size, making it suitable for the space constraints of electronic devices such as wearable products.

[0056] In conjunction with the first aspect, in one possible implementation, the working medium of the solenoid valve is gas or liquid.

[0057] In a second aspect, a pressure-relieving assembly is provided, including the solenoid valve described in the first aspect or any possible implementation thereof.

[0058] Thirdly, a wearable device is provided, comprising: an airbag and a solenoid valve as described in the first aspect or any possible implementation thereof, wherein the airbag is connected to the solenoid valve; wherein, when the airbag is inflated, the first medium flow channel of the solenoid valve is isolated from the second medium flow channel; and when the airbag is deflated, the first medium flow channel of the solenoid valve is connected to the second medium flow channel.

[0059] The solenoid valve provided in this application embodiment has good airtightness, and when applied to wearable devices, it can improve the accuracy of parameters measured using airbags.

[0060] In conjunction with the third aspect, in one possible implementation, the wearable device also includes straps for securing the airbag to a part of the user's body.

[0061] In conjunction with the third aspect, in one possible implementation, the airbag is encapsulated in a strap.

[0062] In conjunction with the third aspect, in one possible implementation, the user's body part includes any one of the wrist, arm, or ankle.

[0063] In conjunction with the third aspect, in one possible implementation, the wearable device also includes an air pump for inflating the airbag.

[0064] In conjunction with the third aspect, in one possible implementation, the wearable device also includes a pressure sensor for detecting pressure within the airbag.

[0065] In conjunction with the third aspect, in one possible implementation, the wearable device is an electronic blood pressure monitor. For example, the wearable device is a blood pressure watch or a blood pressure wristband.

[0066] The solenoid valve provided in this application embodiment is used in electronic blood pressure timers, which helps to achieve miniaturization of electronic blood pressure timers and can also improve the accuracy of blood pressure measurement.

[0067] The beneficial effects of the devices involved in the second and third aspects mentioned above can be referred to the relevant description in the first aspect, which will not be repeated for the sake of brevity. Attached Figure Description

[0068] Figure 1 This is a schematic diagram illustrating the scenario to which the embodiments of this application apply.

[0069] Figure 2This is a schematic structural diagram of an electronic device provided in an embodiment of this application.

[0070] Figure 3 This is an assembly diagram of a solenoid valve provided in an embodiment of this application.

[0071] Figure 4 This is an exploded view of a solenoid valve provided in an embodiment of this application.

[0072] Figure 5 This is a cross-sectional schematic diagram of a solenoid valve provided in an embodiment of this application.

[0073] Figure 6 This is a cross-sectional schematic diagram of another solenoid valve provided in an embodiment of this application.

[0074] Figure 7 This is an exploded view of a solenoid valve provided in an embodiment of this application.

[0075] Figure 8 This is a cross-sectional schematic diagram of a solenoid valve provided in an embodiment of this application.

[0076] Figure 9 This is a cross-sectional schematic diagram of another solenoid valve provided in an embodiment of this application.

[0077] Figure 10 This is an assembly diagram of a pressure-increasing / depressurizing assembly provided in an embodiment of this application.

[0078] Figure 11 This is an exploded view of a pressure-relieving assembly provided in an embodiment of this application.

[0079] Figure 12 This is a cross-sectional schematic diagram of a pressure-releasing assembly provided in an embodiment of this application. Detailed Implementation

[0080] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0081] It should be noted that, in the description of the embodiments of this application, unless otherwise stated, " / " means "or". For example, A / B can mean A or B. The "and / or" in this article is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone.

[0082] In the embodiments of this application, 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Furthermore, in the description of the embodiments of this application, "multiple" refers to two or more, and "at least one" and "one or more" refer to one, two, or more than two. The singular expressions "a," "an," "the," "the," "the," and "this" are intended to also include expressions such as "one or more," unless the context explicitly indicates otherwise.

[0083] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0084] In the description of the embodiments of this application, the terms "upper," "lower," "left," "right," "inner," "outer," "vertical," and "horizontal," etc., indicate orientations or positional relationships relative to the indicated placement of components in the accompanying drawings. It should be understood that these directional terms are relative concepts, used for relative description and clarification, and not to indicate or imply a specific orientation that the device or component must have, or its construction and operation in a specific orientation. They can change accordingly depending on the orientation of the components in the accompanying drawings, and therefore should not be construed as limiting this application. Furthermore, "vertical" in this application is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0085] In the embodiments of this application, the same reference numerals are used to denote the same component or part. For the same part in the embodiments of this application, only one part or component may be labeled with reference numerals in the figures. It should be understood that the reference numerals also apply to other identical parts or components. In addition, the figures are not drawn to scale, and the dimensions and sizes of the various parts shown in the figures are only exemplary and should not be construed as limiting this application.

[0086] To facilitate understanding, the technical terms used in this application will be explained and described below.

[0087] A magnetic yoke, generally speaking, refers to a soft magnetic material that does not produce a magnetic field (magnetic lines of force) itself, but only serves to transmit magnetic lines of force in a magnetic circuit. Magnetic yokes are commonly made of soft iron, A3 steel (i.e., Q235 carbon structural steel), and soft magnetic alloys, which have relatively high magnetic permeability. In some special cases, ferrite materials can also be used. Magnetic yokes can serve the following functions: constraining the outward diffusion of leakage magnetic field from the induction coil; improving the efficiency of induction heating; supporting and fixing the induction coil, etc.

[0088] The magnetic effect of electric current refers to the phenomenon that any conductor carrying an electric current can generate a magnetic field around it. For example, a coil generates a magnetic field when energized because the current makes the coil magnetic.

[0089] An elastic component is a component with elastic properties, that is, a component that can deform under the action of external force and return to its original shape after the external force is removed.

[0090] A permanent magnet is a magnet that can maintain its magnetism for a long period of time. Permanent magnets are hard magnets, not easily demagnetized, and not easily magnetized.

[0091] Permanent magnet materials are materials that are difficult to magnetize and difficult to demagnetize once magnetized. Their main characteristic is high coercivity (usually greater than 1000 A / m).

[0092] Soft magnets are magnets that are easily magnetized, and whose magnetism is easily lost after being magnetized and cannot be maintained for a long time.

[0093] Soft magnetic materials refer to magnetic materials with low coercivity (less than 1000 A / m, usually less than 100 A / m) and high permeability. Their main characteristics are that they are easy to magnetize and easy to demagnetize, and can achieve the maximum magnetization intensity with the minimum external magnetic field.

[0094] Coercive force refers to the magnetic field strength required to reduce the remanent magnetism (remanent magnetic flux density or remanent magnetization) of a magnetic material to zero after magnetization and subsequent demagnetization. Coercive force is also called coercive magnetic field and is represented by the symbol Hc. Generally, soft magnets have relatively small or very small remanent magnetism, while permanent magnets have relatively large remanent magnetism; therefore, the coercive force of permanent magnets is greater than that of soft magnets.

[0095] With the continuous improvement of living standards, people are paying more and more attention to their health, and blood pressure, as a major physiological indicator, is receiving increasing attention. Electronic blood pressure monitors are medical devices that measure blood pressure using electronic technology and the principle of indirect blood pressure measurement. The miniaturization of electronic blood pressure monitors increases their portability, making them suitable for home use and meeting the daily blood pressure measurement needs of families. Currently, the main forms of electronic blood pressure monitors on the market include arm-type electronic blood pressure monitors (hereinafter referred to as arm-type blood pressure monitors), wrist-type electronic blood pressure monitors (hereinafter referred to as wrist-type blood pressure monitors), and watch-type electronic blood pressure monitors (hereinafter referred to as watch-type blood pressure monitors or blood pressure watches). For example, Figure 1 The diagrams above show schematics of several types of electronic blood pressure monitors.

[0096] Figure 1 Image (a) shows a schematic diagram of a use case for an arm-type blood pressure monitor. Figure 1 As shown in (a), the arm-type blood pressure monitor 100 may include a main unit 101, a cuff 102, and an air tube 103. The main unit 101 is equipped with an air pump, the cuff 102 contains an air bladder, and the air tube 103 connects the air pump in the main unit 101 to the air bladder in the cuff 102. In use, the cuff 102 can be wrapped around and secured to the arm of the user. The main unit 101 can control the air pump to inflate the air bladder, causing it to expand and compress the blood vessels, and can also control the deflation of the air bladder, thereby achieving blood pressure measurement.

[0097] Figure 1 (b) shows a schematic diagram of a wrist blood pressure monitor in use. Figure 1 As shown in (b), the wrist blood pressure monitor 200 may include a main unit 201 and a wristband 202. The main unit 201 is equipped with an air pump, and the wristband 202 encapsulates an air bladder. The air pump is connected to the air bladder. In use, the wristband 202 can be wrapped around and secured to the wrist of the user, with the main unit 201 located on the palm side. The main unit 201 can control the air pump to inflate the air bladder, causing it to expand and compress blood vessels, and can also control the deflation of the air bladder, thereby achieving blood pressure measurement.

[0098] Figure 1 (c) shows a schematic diagram of a use case for a wristwatch-style blood pressure monitor. Figure 1As shown in (c), the watch-type blood pressure monitor 300 may include a main unit 301 and a strap 302. The main unit 301 contains an air pump, and the strap 302 encapsulates an air bladder. The air pump is connected to the air bladder. In use, the strap 302 can be wrapped around and secured to the wrist, with the main unit 301 located on the back of the hand. The main unit 301 can control the air pump to inflate the air bladder, causing it to expand and compress blood vessels, and can also control the deflation of the air bladder, thereby achieving blood pressure measurement. Of course, in other embodiments, besides the watch-type blood pressure monitor, the electronic blood pressure monitor involved in this application can also be other wearable blood pressure monitors, such as portable blood pressure monitors suitable for long-term wear, such as blood pressure wristbands.

[0099] Most electronic blood pressure monitors use the oscillometric method to indirectly measure blood pressure. Figure 1 Taking the arm-type blood pressure monitor 100 shown in (a) as an example, the process of measuring blood pressure based on the oscillometric method is as follows: After the cuff 102 is secured, the main unit 101 controls the air pump to inflate the air bladder, causing the air bladder to expand and compress the blood vessel; when the air bladder expands to a certain extent, it will compress and close the blood vessel, blocking blood flow; when the blood flow is completely blocked, the main unit 101 then controls the air bladder to deflate. At this time, the blood vessel will generate a vibration waveform, which can cause the gas inside the air bladder to oscillate. The oscillation waveform of the gas is related to the vibration waveform of the blood vessel; the main unit 101 can collect the oscillation waveform signal of the gas and process the oscillation waveform signal according to the built-in algorithm (such as the amplitude coefficient method) to calculate the blood pressure value. The blood pressure measurement principle of the wrist blood pressure monitor 200 and the watch-type blood pressure monitor 300 is the same as above, and will not be described in detail for simplicity.

[0100] It is understood that the types and measurement principles of electronic blood pressure monitors described above are merely exemplary. In other embodiments, electronic blood pressure monitors may have other product forms (such as blood pressure wristbands) or may employ other measurement principles (such as the Korotkoff sound method), which will not be described in detail here.

[0101] The technical solutions provided in this application can be applied to electronic devices with pressure inflation / deflation functions, such as electronic devices with blood pressure detection functions. In some embodiments, the electronic device can be a wearable device, which can be a portable device that can be integrated into a user's clothing or accessories, has computing capabilities, and can also connect to a mobile phone or other terminal devices. For example, the wearable device can be a smartwatch (such as...). Figure 1 (as shown in (c)), smart bracelet, wrist blood pressure monitor (such as...) Figure 1 (b) shown in the figure), arm-type blood pressure monitor (such as Figure 1 As shown in (a) above, this application does not specifically limit the type of wearable device.

[0102] Figure 2A schematic structural diagram of an electronic device according to an embodiment of this application is shown. For example, Figure 2 Electronic device 410 shown in (a) or Figure 2 The electronic device 420 shown in (b) can be Figure 1 A specific example of the electronic blood pressure monitor shown (such as arm blood pressure monitor 100, or wrist blood pressure monitor 200, or watch blood pressure monitor 300) is that the electronic device 410 or electronic device 420 may have blood pressure detection function.

[0103] like Figure 2 (a) or as in Figure 2 As shown in (b), electronic device 410 or electronic device 420 may include detection component 401, processor 402, display component 403, power supply component 404, memory 405, input / output interface 406, and in some embodiments, electronic device 410 or electronic device 420 may also include wireless communication component 407.

[0104] It should be noted that, Figure 2 The electronic device 410 shown in (a) is... Figure 2 The main difference of the electronic device 420 shown in (b) is that the detection component 401 is slightly different, which will be described in detail below.

[0105] Detection component 401 is the core component for blood pressure detection. As an example, such as Figure 2 As shown in (a), in electronic device 410, detection component 401 may include air pump 4011, airbag 4012 and sensor 4013.

[0106] Air pump 4011 is connected to airbag 4012 and is used to inflate or deflate airbag 4012 (i.e., to expel air from airbag 4012). For example, when air pump 4011 inflates airbag 4012, the exhaust port in air pump 4011 is closed, and the pressure inside airbag 4012 continuously increases; when it is necessary to expel gas from airbag 4012, the exhaust port in air pump 4011 is open, and gas is discharged through the exhaust port. In this embodiment, air pump 4011 can be an electric air pump, a manual air pump, or a foot-operated air pump. Exemplarily, air pump 4011 can be a miniature air pump, such as a diaphragm miniature air pump, an electromagnetic miniature air pump, an impeller miniature air pump, a piston miniature air pump, etc. This application does not limit the specific type of air pump 4011.

[0107] The airbag 4012 stores the air pumped in by the air pump 4011 and can be attached to the user's area to be tested during use. For example, the electronic device 410 may also include a strap containing the airbag 4012. When using the electronic device 410, the strap can be used to surround and attach the airbag 4012 to the user's area to be tested. Exemplarily, the user's area to be tested can be the user's wrist, upper arm, ankle, or other identification parts. Correspondingly, the strap can also have a corresponding name, such as a cuff, wristband, watch strap, ankle strap, etc., which is not limited in this embodiment.

[0108] Sensor 4013 is connected to airbag 4012 to acquire sensor parameters for calculating blood pressure values. Exemplarily, sensor 4013 may include a pressure sensor and / or a pulse wave signal sensor, wherein the pressure sensor (such as a barometer) is used to detect the air pressure within airbag 4012, and the pulse wave signal sensor is used to measure the pulse wave signal. By way of example and not limitation, in an example of blood pressure measurement based on oscillometric methods, sensor 4013 may be a barometer capable of acquiring oscillating waveform signals of gas through the air passage between the barometer and airbag 4012 and sending them to processor 402.

[0109] In some embodiments, the sensor 4013 and the airbag 4012 can be connected via an air passage, and the sensor 4013 measures the air pressure of the airbag 4012 through the air passage. In other embodiments, the sensor 4013 can be attached to the inner wall of the airbag 4012 to measure the air pressure of the airbag 4012.

[0110] In some embodiments, a solenoid valve 4014 may be provided in the air passage between the air pump 4011 and the airbag 4012 to control the opening and closing of the air passage between the air pump 4011 and the airbag 4012, thereby realizing the inflation and / or deflation of the airbag 4012. For example, when it is necessary to inflate the airbag 4012, the solenoid valve 4014 is in the open state, and gas can be delivered to the airbag 4012 by the air pump 4011; when it is necessary to expel the gas in the airbag 4012, the solenoid valve 4014 is in the open state, and gas can flow from the airbag 4012 to the air pump 4011. In addition, when it is necessary to maintain the pressure in the airbag 4012, the solenoid valve 4014 can be in the closed state.

[0111] As another example, such as Figure 2As shown in (b), in the electronic device 420, the detection component 401 may include an air pump 4011, an airbag 4012, a sensor 4013, and a solenoid valve 4015. The air pump 4011 and the solenoid valve 4015 are respectively connected to the air passage of the airbag 4012 and serve as two air outlets of the airbag 4012. The air passage between the air pump 4011 and the airbag 4012 can be referred to as the first air passage, and the air passage between the solenoid valve 4015 and the airbag 4012 can be referred to as the second air passage. In some embodiments, the solenoid valve 4015 may also be referred to as a pressure relief valve.

[0112] Here, with both a first air passage and a second air passage provided, the first air passage can be used for inflating the airbag 4012 or for both inflating and deflating the airbag 4012, while the second air passage can be used for deflating the airbag 4012. That is, the airbag 4012 can be inflated via an air passage connected to the air pump 4011, and the airbag 4012 can be deflated via one or more air passages. For example, the airbag 4012 can be deflated via the first and second air passages, where the inlet and outlet of the first air passage are the airbag 4012 and the air pump 4011, respectively, and the inlet and outlet of the second air passage are the airbag 4012 and the solenoid valve 4015, respectively. In other words, the gas in the airbag 4012 can be discharged through two different outlets. For example, when the airbag 4012 needs to be inflated, the exhaust port of the air pump 4011 is closed, and the solenoid valve 4015 is closed, allowing the air pump 4011 to inflate the airbag 4012. When the airbag 4012 needs to be deflated, the exhaust port of the air pump 4011 is open, and the solenoid valve 4015 is open, allowing the airbag 4012 to be deflated through both the air pump 4011 and the solenoid valve 4015; alternatively, both exhaust ports of the air pump 4011 are closed, and the solenoid valve 4015 is open, allowing the airbag 4012 to be deflated only through the solenoid valve 4015.

[0113] Understandable, Figure 2 In the electronic device 420 shown in (b), the first air path may also be equipped with something like... Figure 2 The working principle and process of the solenoid valve 4014 shown in (a) can be referred to in the above description of solenoid valve 4014. For the sake of brevity, it will not be repeated.

[0114] Here, the first and second air paths can be independent of each other with no overlapping paths, or the first and second air paths can partially overlap; this application does not limit this. In some embodiments, if the air inlets of the two air paths are the same but the air outlets are different, or if the air inlets of the two air paths are different but the air outlets are the same, the two air paths can be referred to as parallel or connected in parallel.

[0115] In this embodiment, the airbag 4012 is pneumatically connected to the air pump 4011, and also pneumatically connected to the solenoid valve 4015. The airbag 4012 can also be pneumatically connected to the sensor 4013. In practical applications, the parts requiring pneumatic connections between the air pump 4011, airbag 4012, sensor 4013, and solenoid valve 4015 can be achieved using pneumatic connectors.

[0116] It is understood that the sensor 4013 used for blood pressure detection is only one type of sensor included in the electronic device 410 or 420. In some other embodiments, the electronic device 410 or 420 may also include other types of sensors, such as motion sensors (e.g., gyroscope sensors, accelerometer sensors) for acquiring user motion data or posture data, and biosensors (e.g., optical heart rate sensors, blood oxygen sensors, bioimpedance sensors, electrocardiogram sensors, skin conductance sensors, skin temperature sensors) for acquiring user biological signals. This application embodiment does not limit this.

[0117] The processor 402 can be used to control and process information, and connect various parts of the entire electronic device (such as electronic device 410 or 420) using various interfaces and lines, to execute various functions of the electronic device and process data, thereby providing overall monitoring of the operation of the electronic device. In this embodiment, the air pump 4011, solenoid valves (such as solenoid valves 4014 and 4015), and sensor 4013 are connected to the processor 402. Under the control of the processor 402, the air pump 4011 is used to inflate the airbag 4012, the solenoid valve is used to control the opening and closing of the air passage, and the sensor 4013 is used to acquire sensing parameters for calculating blood pressure values ​​to achieve blood pressure detection. As an example and not a limitation, for example, the processor 402 can be connected to the air pump 4011 to control the air pump 4011 to inflate or deflate the airbag 4012. The processor 402 can also be connected to the sensor 4013 to acquire the pressure signal or pulse wave signal detected by the sensor 4013 within the airbag 4012. The processor 402 can also be connected to the solenoid valve 4015 to control the solenoid valve 4015 to deflate the airbag 4012.

[0118] Processor 402 may include one or more processing units, such as an application processor (AP), graphics processing unit (GPU), image signal processor (ISP), baseband processor, modem processor, controller, etc. Different processing units may be independent components or integrated into one or more processors. The controller may be the nerve center and command center of the electronic device. The controller can generate operation control signals based on instruction opcodes and timing signals to control instruction fetching and execution.

[0119] The processor 402 may also include a memory for storing instructions and data. For example, the memory in the processor 402 may be a cache memory. This memory can store instructions or data that the processor 402 has just used or is reusing. If the processor 402 needs to use the instruction or data again, it can retrieve it directly from this memory. This avoids repeated accesses, reduces the waiting time of the processor 402, and thus improves the efficiency of the electronic device in processing data or executing instructions.

[0120] Display component 403 is used to display images, videos, such as information input by the user or information provided to the user, and various menu interfaces of electronic devices. For example, display component 403 can display blood pressure measurement results. Display component 403 includes a display panel. In some embodiments, the display panel can be configured using liquid crystal display (LCD), organic light-emitting diode (OLED), active-matrix organic light-emitting diode (AMOLED), flexible light-emitting diode (FLED), quantum dot light-emitting diodes (QLED), etc.

[0121] Power supply component 404 provides system power to the electronic device, supplying power to its various components. Power supply component 404 can support the electronic device receiving charging input. In some embodiments, power supply component 404 may include a power management unit (PMU) and a battery. The power management unit (PMU) may include a charging circuit, a voltage drop regulation circuit, a protection circuit, a power measurement circuit, etc. The charging circuit can receive external charging input. The voltage drop regulation circuit can transform the electrical signal input to the charging circuit and output it to the battery to complete battery charging; it can also transform the electrical signal input from the battery and output it to other components such as the detection component 401, the display component 403, and the wireless communication component 407. The protection circuit can be used to prevent battery overcharging, over-discharging, short circuits, or overcurrent. The power management unit can also be used to monitor parameters such as battery capacity, battery cycle count, and battery health status (leakage current, impedance).

[0122] The memory 405 can be used to store computer executable program code, which includes instructions. The processor 402 executes various functional applications and data processing of the electronic device by running the instructions stored in the memory 405, such as implementing the charging function, wireless communication function, blood pressure detection function, etc. of the electronic device.

[0123] The input / output interface 406 is used to provide a wired connection for charging or communication of electronic devices. In some embodiments, the input / output interface 406 may include an electrical connector for conducting and transmitting current.

[0124] The wireless communication component 407 can be used to support data exchange between electronic devices and other devices via wireless communication technologies such as Bluetooth (BT), Global Navigation Satellite System (GNSS), Wireless Local Area Networks (WLAN) (e.g., Wireless Fidelity (Wi-Fi) networks), Frequency Modulation (FM), Near Field Communication (NFC), and Infrared (IR). In some embodiments, the wireless communication component 407 may include a Bluetooth chip. Electronic devices can pair with Bluetooth chips in other electronic devices and establish a wireless connection through this Bluetooth chip, thereby enabling wireless communication between the electronic devices and other devices. The wireless communication component 407 may be one or more devices integrating at least one communication processing module.

[0125] In some embodiments, Figure 2 The electronic device shown in (a) or (b) may also include an audio component to enable the electronic device to input and output audio signals.

[0126] In some embodiments, Figure 2 In the structure shown, apart from the airbag 4012, other components or parts can be integrated as follows: Figure 1 The hosts involved, such as host 101, host 201 or host 301.

[0127] It is understood that the structures illustrated in the embodiments of this application do not constitute a specific limitation on electronic devices 410 or 420. In other embodiments of this application, electronic devices 410 or 420 may include more or fewer components than illustrated, or combine some components, or split some components, or have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0128] Additionally, it should be noted that, in measuring blood pressure, besides using gas to apply pressure to the user's test site, liquid can also be used to apply pressure to the user's test site. In other words, in some embodiments, the airbag 4012 can be replaced with a flexible component that can be inflated with liquid. In this case, the detection assembly 401 may not include the air pump 4011.

[0129] For ease of description and understanding, the components that apply pressure to the user's area to be tested are collectively referred to as pressure bladders in this application embodiment. These pressure bladders can be filled with either gas or liquid. Accordingly, Figure 2 In the schematic diagram shown, sensor 4013 can be a pressure sensor capable of measuring the pressure in the pressure bladder or a pulse wave signal sensor capable of measuring pulse wave signals, and solenoid valve 4015 can be a pressure relief valve capable of releasing gas or liquid from the pressure bladder. For ease of understanding, the technical solution provided in this application embodiment is described below using an air bladder as an example. In some other embodiments, the technical solution provided in this application embodiment can also be applied to scenarios where liquid is filled into the pressure bladder.

[0130] As mentioned above, electronic blood pressure monitors measure blood pressure through the inflation and deflation of an air bladder. The solenoid valve, a crucial component controlling the airflow in the monitor, directly affects the accuracy of blood pressure measurements due to its airtightness. However, in existing electronic blood pressure monitors, the solenoid valves are relatively large to meet sealing requirements. With rising living standards and increased focus on health, people demand the ability to dynamically measure blood pressure anytime, anywhere. This has led to miniaturization and wearable designs becoming the development trend for electronic blood pressure monitors. However, the large size of the solenoid valve makes it difficult to meet the space constraints of miniaturization and wearable designs in electronic blood pressure monitors.

[0131] Therefore, this application provides a solenoid valve that enables miniaturization. When applied to an electronic blood pressure monitor, the solenoid valve helps reduce the size of the monitor and meets user needs.

[0132] Figures 3 to 5 A schematic structural diagram of a solenoid valve according to an embodiment of this application is shown. Specifically, Figure 3 This illustration shows an assembly diagram of a solenoid valve according to an embodiment of this application. Figure 4 An exploded view of a solenoid valve provided in an embodiment of this application is shown. Figure 5 A cross-sectional schematic diagram of a solenoid valve provided in an embodiment of this application is shown.

[0133] Combination Figures 3 to 5 As shown, the solenoid valve 500 mainly includes a housing 1, an electromagnetic assembly 2, a reset assembly 3, and a valve core assembly 4. A first medium flow channel 71 is provided on the housing 1. The electromagnetic assembly 2 includes a yoke 21 and a coil 22. The yoke 21 has a space for accommodating the coil 22 and a second medium flow channel 72. The electromagnetic assembly 2 is fastened to the housing 1 to form a receiving cavity, which is used to accommodate the reset assembly 3 and the valve core assembly 4. The valve core assembly 4 is disposed between the electromagnetic assembly 2 and the housing 1, and the reset assembly 3 is disposed on the side of the valve core assembly 4 facing (or near) the electromagnetic assembly 2 and / or the side of the valve core assembly 4 away from the electromagnetic assembly 2. The electromagnetic assembly 2 drives the valve core assembly 4 to move when the coil 22 is energized, and the reset assembly 3 drives the valve core assembly 4 to move when the coil 22 is de-energized, so that the first medium flow channel 71 and the second medium flow channel 72 are connected or disconnected.

[0134] In this embodiment, when the electromagnetic component 2 is engaged with the housing 1, the magnetic yoke 21 is directly engaged with the housing 1. The magnetic yoke 21 actually serves as part of the outer shell of the solenoid valve 500. By engaging the magnetic yoke 21 with the housing 1, a space is formed to accommodate other components, simplifying the device and resulting in a simple structure. This helps to reduce the overall size of the solenoid valve, thereby meeting the space requirements of electronic devices and achieving miniaturization or improving the internal space utilization of electronic devices. Furthermore, the solenoid valve structure provided in this embodiment is simple, making the manufacturing process simpler and more reliable. It can improve the dimensional accuracy of the internal components of the solenoid valve, reduce the assembly difficulty of the solenoid valve, and improve the yield. In addition, the medium flow channel is set on the housing 1 and the magnetic yoke 21, which helps to form an overall seal, thereby improving the airtightness of the solenoid valve, and correspondingly improving its corrosion resistance and reliability. Due to the improved sealing performance of the solenoid valve, when it is applied to an electronic blood pressure monitor, it can reduce or avoid air leakage, thereby reducing or avoiding the problem of unstable differential pressure and improving the measurement accuracy of the electronic blood pressure monitor.

[0135] The structure of the solenoid valve provided in the embodiments of this application will be described in more detail below with reference to the accompanying drawings.

[0136] refer to Figure 4 and Figure 5 The magnetic yoke 21 may include a first body 211 and a protrusion 212 protruding from the surface of the first body 211. Specifically, the protrusion 212 protrudes from the surface of the first body 211 toward the housing 1 (or valve core assembly 4). The first body 211 may be connected to the housing 1. The protrusion 212 is provided with a first receiving space 213 with an opening toward the valve core assembly 4, the first receiving space 213 being used to receive the coil 22.

[0137] refer to Figure 5 The housing 1 has a first groove 11 on the side facing the yoke 21. The first groove 11 is used to receive the protrusion 212 and the coil 22 received in the first receiving space 213. That is, the housing 1 may include a second body 12 and an extension 13 extending from the periphery (or edge) of the second body 12 toward the yoke 21, wherein the second body 12 and the extension 13 may form the first groove 11 with an opening facing the yoke 21. In some embodiments, the first body 211 may also be received in the first groove 11.

[0138] With the housing 1 and the magnetic yoke 21 connected, i.e., the housing 1 and the magnetic yoke 21 fastened together, the coil 22 is housed in the first receiving space 213 provided on the protrusion 212, and the protrusion 212 is housed in the first groove 11 provided on the housing 1. The valve core assembly 4 is also housed in the first groove 11, and at least a portion of the valve core assembly 4 is located between the protrusion 212 and the bottom wall 111 of the first groove 11. Here, the first body 211 is connected to the housing 1, the protrusion 212 is housed in the first groove 11, and the aforementioned receiving cavity can be formed between the magnetic yoke 21 with the coil 22 installed and the housing 1. In this embodiment, the first medium flow channel 71 and the second medium flow channel 72 can be understood as part of the receiving cavity.

[0139] Here, a first receiving space 213 for housing the coil 22 is provided on the magnetic yoke 21, realizing the enclosure of the coil 22 by a single component. This eliminates the need for the magnetic yoke 21 to cooperate with other components to form a mounting slot for the coil 22. This facilitates the installation of the coil 22, reduces the assembly difficulty of the solenoid valve, effectively saves space, and promotes the miniaturization or micro-miniaturization of the solenoid valve. It also helps to form an integral seal, improving the sealing performance of the solenoid valve. Furthermore, the magnetic yoke 21 can transmit the magnetic lines of force generated by the energized coil to the required location, thereby forming a magnetic field where needed and reducing magnetic leakage.

[0140] In some embodiments, the housing 1 and the magnetic yoke 21 can be fixedly connected together by welding, bonding, snap-fitting, threaded connection, or other methods. For example, the housing 1 and the magnetic yoke 21 can be connected by fixing the first body 211 to the extension 13. In this embodiment, the housing 1 and the magnetic yoke 21 are sealed together, for example, by using adhesive, double-sided tape, or deformable materials at the connection point to achieve overall sealing of the solenoid valve.

[0141] In some embodiments, the housing 1 is a one-piece structure (or a non-removable structure), for example, the housing 1 is integrally formed.

[0142] In some embodiments, the magnetic yoke 21 is an integral structure (or a non-removable structure), for example, the magnetic yoke 21 is integrally formed.

[0143] The housing 1 and / or magnetic yoke 21 are integrated, making the manufacturing process simpler.

[0144] In some embodiments, the first body 211 may be connected to the end face of the extension 13 (i.e., the end face of the extension 13 that is away from the second body 12 in the fastening direction), so that the first body 211 may be located outside the first groove 11. Alternatively, the first body 211 may be connected to the side face of the extension 13 (i.e., the side wall 112 of the first groove 11), so that the first body 211 is also received within the first groove 11.

[0145] Continue to refer to Figure 5 The housing 1 is provided with a first medium flow channel 71, which is connected to a first groove 11. The magnetic yoke 21 is provided with a second medium flow channel 72, which is also connected to the first groove 11. Therefore, the first medium flow channel 71 and the second medium flow channel 72 can be connected through the first groove 11. Whether the first medium flow channel 71 and the second medium flow channel 72 can be connected through the first groove 11 is controlled by the movement of the valve core assembly 4.

[0146] In this embodiment, the valve core assembly 4 is disposed between the electromagnetic assembly 2 and the housing 1. The valve core assembly 4 can move along the engagement direction of the housing 1 and the magnetic yoke 21 under the action of the electromagnetic assembly 2 and the reset assembly 3 to control whether the first medium flow channel 71 and the second medium flow channel 72 are connected. For example, when the valve core assembly 4, under the action of the electromagnetic assembly 2 or the reset assembly 3, blocks the position where the first medium flow channel 71 communicates with the first groove 11 or blocks the position where the second medium flow channel 72 communicates with the first groove 11, the passage between the first medium flow channel 71 and the second medium flow channel 72 is interrupted, that is, the first medium flow channel 71 and the second medium flow channel 72 are not connected. This situation can also be referred to as the solenoid valve being in a closed state. When the valve core assembly 4, under the action of the electromagnetic assembly 2 or the reset assembly 3, does not block the position where the first medium flow channel 71 communicates with the first groove 11 or the position where the second medium flow channel 72 communicates with the first groove 11, the first medium flow channel 71 and the second medium flow channel 72 can be connected through the first groove 11. This situation can also be described as the solenoid valve being in the open or open state. That is, the valve core assembly 4 is used to move along the engagement direction of the housing 1 and the magnetic yoke 21 under the action of the solenoid assembly 2 and the reset assembly 3, so as to control the opening or closing of the passage formed by the first medium flow channel 71 and the second medium flow channel 72 through the first groove 11.

[0147] Here, the first medium flow channel 71 and the second medium flow channel 72 are respectively disposed on the housing 1 and the magnetic yoke 21. After the housing 1 and the magnetic yoke 21 are fastened together, a space is formed that connects the first medium flow channel 71 and the second medium flow channel 72. In this embodiment, since the accommodating space is formed by the connection between the housing 1 and the magnetic yoke 21, there are fewer sealing interfaces, which improves the reliability of the seal, and thus the sealing performance of the entire passage is better.

[0148] In some embodiments, reference Figure 5As shown, the first medium flow channel 71 provided on the housing 1 may include a first opening 711 and a second opening 712. The first opening 711 is provided on the bottom wall 111 or side wall 112 of the first groove 11, and the second opening 712 is provided on other walls of the housing 1 other than the bottom wall 111 and side wall 112 of the first groove 11 (i.e., the outer wall of the housing 1). In other words, the first medium flow channel 71 communicates with the first groove 11, and the first opening 711 can be formed on the bottom wall 111 or side wall 112 of the first groove 11; the first medium flow channel 71 communicates with the outside of the housing 1 (i.e., the outside of the solenoid valve), and the second opening 712 can be formed on the outer wall of the housing 1. In this embodiment of the application, the sidewall 112 and bottomwall 111 of the first groove 11 (or the wall of the housing 1 used to form the accommodating space when the housing 1 and the magnetic yoke 21 are fastened together) can be understood as the inner wall of the housing 1, and the wall of the housing 1 away from the first groove 11 (or the wall of the housing 1 exposed when the housing 1 and the magnetic yoke 21 are fastened together) can be understood as the outer wall of the housing 1.

[0149] As an example, and not a limitation, for instance, the first opening 711 may be provided on the bottom wall 111 of the first groove 11, and the second opening 712 may be provided on the outer wall 141 (also referred to as the first outer wall 141 for ease of description) of the second body 12 away from the first groove 11. For example, the first opening 711 may be provided on the bottom wall 111 of the first groove 11, and the second opening 712 may be provided on the outer wall 142 (also referred to as the second outer wall 142 for ease of description) of the extension 13 away from the first groove 11. Furthermore, the first opening 711 may be provided on the side wall 112 of the first groove 11, and the second opening 712 may be provided on the first outer wall 141. Again, the first opening 711 may be provided on the side wall 112 of the first groove 11, and the second opening 712 may be provided on the second outer wall 142. When the first opening 711 is located on the bottom wall 111 of the first groove 11 and the second opening 712 is located on the first outer wall 141, the first medium flow channel 71 can be configured by drilling, which is a simple process.

[0150] It is understood that, in this embodiment of the application, since the first medium flow channel 71 connects the first groove 11 and the outside of the housing 1, the first opening 711 and the second opening 712 of the first medium flow channel 71 are not simultaneously provided on the bottom wall 111 and / or side wall 112 of the first groove 11. That is, the first opening 711 and the second opening 712 are not simultaneously provided on the bottom wall 111 of the first groove 11, nor are they simultaneously provided on the side wall 112 of the first groove 11, nor is one opening provided on the bottom wall 111 of the first groove 11 and the other opening provided on the side wall 112 of the first groove 11.

[0151] Here, the complete first medium flow channel 71 is formed by the single component of the housing 1, which can improve the sealing performance of the pipeline in the solenoid valve and simplify the assembly process. In addition, when the housing 1 is a one-piece structure, its manufacturing process is simpler.

[0152] In some embodiments, the first medium flow channel 71 can be in the form of a through hole, that is, the centerline of the first medium flow channel 71 is a straight line. For example, the first medium flow channel 71 can be a cylindrical hole, a tapered hole, a stepped hole, a threaded hole, etc.

[0153] The through-hole type first medium flow channel 71 has low resistance to the working medium (such as gas or liquid) of the solenoid valve, which allows the working medium to pass through the first medium flow channel 71 smoothly, improving the response speed and pressure relief efficiency of the solenoid valve and reducing the pressure relief time.

[0154] In some embodiments, reference Figure 5 As shown, the second medium flow channel 72 provided on the magnetic yoke 21 may include a third opening 721 and a fourth opening 722. The third opening 721 is provided on the surface of the protrusion 212 facing the bottom wall 111 of the first groove 11, and the fourth opening 722 is provided on the surface of the first body 211 away from the bottom wall 111 of the first groove 11. This allows the second medium flow channel 72 to be configured by drilling, simplifying the manufacturing process. It is understood that the third opening 721 is different from the opening of the first receiving space 213; that is, the third opening 721 and the opening of the first receiving space 213 are located at different positions on the surface of the protrusion 212 facing the bottom wall 111 of the first groove 11.

[0155] Here, the complete second medium flow channel 72 is formed by the single component of the magnetic yoke 21, which can improve the sealing performance of the pipeline in the solenoid valve and simplify the assembly process. In addition, when the magnetic yoke 21 is a one-piece structure, its manufacturing process is simpler.

[0156] In some embodiments, the second medium flow channel 72 can be in the form of a through hole, that is, the centerline of the second medium flow channel 72 is a straight line. For example, the second medium flow channel 72 can be a cylindrical hole, a tapered hole, a stepped hole, a threaded hole, etc.

[0157] The through-hole type of the second medium flow channel 72 has low resistance to the working medium (such as gas or liquid) of the solenoid valve, which allows the working medium to pass through the second medium flow channel 72 smoothly, improving the response speed and pressure relief efficiency of the solenoid valve and reducing the pressure relief time.

[0158] In some embodiments, the second medium flow channel 72 is coaxially arranged with the first medium flow channel 71, or in other words, the centerline of the second medium flow channel 72 coincides with the centerline of the first medium flow channel 71. This allows the working medium of the solenoid valve to flow smoothly from the inlet to the outlet during pressure relief, resulting in a short flow distance, low resistance, improved response speed and pressure relief efficiency, and reduced pressure relief time.

[0159] In some embodiments, at least one first receiving space 213 may be provided on the protrusion 212, and the electromagnetic component 2 may include at least one coil 22, wherein the at least one first receiving space 213 corresponds one-to-one with the at least one coil 22. Specifically, one of the at least one first receiving spaces 213 is used to receive one of the at least one coil 22.

[0160] As an example, multiple first receiving spaces 213 can be provided on the protrusion 212. These multiple first receiving spaces 213 can be arranged in a ring array (such as a circular ring, square ring, triangular ring, etc.). Correspondingly, the coils 22 housed in these multiple first receiving spaces 213 can form a coil array. When multiple coils 22 are provided in the solenoid valve, these multiple coils 22 can be divided into multiple groups to work in turn. When one group of coils fails, the other groups of coils can continue to work, which helps to extend the service life of the solenoid valve.

[0161] As another example, a first receiving space 213 can be provided on the protrusion 212. (See reference) Figure 4 and Figure 5 As shown, the protrusion 212 may include a first protrusion 2121 and a second protrusion 2122. The second protrusion 2122 is disposed around the first protrusion 2121, and a groove is formed between the first protrusion 2121 and the second protrusion 2122. This groove is the aforementioned first receiving space 213 for accommodating the coil 22. For example, the first receiving space 213 may be annular (such as a circular ring, square ring, triangular ring, etc.), and the coil 22 housed in the first receiving space 213 may be an annular coil. When a single coil 22 is provided in the solenoid valve, the circuit connection and wiring layout can be simplified.

[0162] In some embodiments, the third opening 721 of the second medium flow channel 72 may be disposed on the surface of the first protrusion 2121 facing the bottom wall 111 of the first groove 11. Thus, when the valve core assembly 4 is used to block or open the third opening 721, the force on the valve core assembly 4 is more uniform, which can improve the blocking effect of the valve core assembly 4.

[0163] In some embodiments, a groove (i.e., a first receiving space 213) between the first protrusion 2121 and the second protrusion 2122 is disposed around the second medium flow channel 72. Accordingly, a coil 22 housed in the groove is disposed around the second medium flow channel 72.

[0164] There are several ways to set the reset component 3. As mentioned above, the reset component 3 can be set on the side of the valve core assembly 4 facing the electromagnetic component 2 and / or on the side of the valve core assembly 4 away from the electromagnetic component 2.

[0165] As an example, the reset component 3 can be located on the side of the valve core assembly 4 facing the solenoid component 2, that is, the reset component 3 and the solenoid component 2 can be located on the same side of the valve core assembly 4.

[0166] For example, refer to Figure 4 and Figure 5 The reset assembly 3 may include an elastic element 31, which is disposed around the periphery of the protrusion 212, for example, the elastic element 31 is sleeved on the protrusion 212. It is understood that when the protrusion 212 includes the aforementioned first protrusion 2121 and second protrusion 2122, the elastic element 31 is sleeved on the second protrusion 2122. One end of the elastic element 31 abuts against the valve core assembly 4, and the other end of the elastic element 31 abuts against the first body 211. More specifically, one end of the elastic element 31 abuts against the surface of the valve core assembly 4 facing the coil 22 (or the elastic element 31), and the other end of the elastic element 31 abuts against the surface of the first body 211 facing the valve core assembly 4.

[0167] In some embodiments, the surface of the first body 211 facing the valve core assembly 4 can be a plane, and the elastic member 31 can abut against this plane. In other embodiments, such as Figure 5 As shown, the surface of the first body 211 facing the valve core assembly 4 can be a stepped surface, that is, a step is provided between the first body 211 and the protrusion 212, and the elastic element 31 can abut against the stepped surface. In this way, when the connection between the first body 211 and the extension 13 is sealed by dispensing, it can be avoided that the dispensing overflows to the elastic element 31 and affects the performance of the elastic element 31.

[0168] In this embodiment, when the coil 22 is not energized (i.e., the coil 22 is not working), the elastic element 31 is in a compressed state. Under the elastic force of the elastic element 31, the valve core assembly 4 abuts against the bottom wall 111 of the first groove 11. When the coil 22 is energized (i.e., the coil 22 is working), the coil 22 generates a magnetic field, which can magnetize (or polarize) the yoke 21, causing the yoke 21 to generate a magnetic force. The valve core assembly 4 includes a magnetic material, which can be attracted by the magnetized yoke 21. The magnetic attraction force of the yoke 21 is greater than the elastic force of the elastic element 31. Therefore, the magnetized yoke 21 can overcome the elastic force of the elastic element 31 to attract the valve core assembly 4, thereby driving the valve core assembly 4 to move towards the coil 22 side, while the elastic element 31 is further compressed. When the coil 22 is de-energized (i.e., the coil 22 is not working), the magnetic field of the coil 22 disappears, the magnetic force of the yoke 21 disappears, the magnetic attraction between the yoke 21 and the valve core assembly 4 disappears, and the elastic element 31 tends to return to its original state. Therefore, under the elastic force of the elastic element 31, the valve core assembly 4 moves toward the bottom wall 111 of the first groove 11, that is, moves away from the coil 22, and finally abuts against the bottom wall 111 of the first groove 11.

[0169] In some embodiments, when the coil 22 is energized, the magnetized yoke 21 drives the valve core assembly 4 to block the second medium flow channel 72, thereby isolating the passage between the first medium flow channel 71 and the second medium flow channel 72. When the coil 22 is not energized, the elastic element 31 drives the valve core assembly 4 to open the second medium flow channel 72, thereby connecting the first medium flow channel 71 and the second medium flow channel 72.

[0170] For ease of understanding, the following example uses the second medium flow channel 72 connected to the airbag, combined with... Figure 5The working process of the solenoid valve is described below. When the electronic blood pressure monitor is not working, the coil 22 is not energized. Under the elastic force of the elastic element 31, the valve core assembly 4 abuts against the bottom wall 111 of the first groove 11. The valve core assembly 4 neither blocks the third opening 721 of the second medium flow channel 72 nor the first opening 711 of the first medium flow channel 71. Therefore, the first medium flow channel 71 and the second medium flow channel 72 are connected through the first groove 11, and the solenoid valve is in the open state. When the electronic blood pressure monitor is inflating, for example, when the user clicks the measurement button on the electronic blood pressure monitor display or presses the measurement button on the electronic blood pressure monitor, the air pump inflates the air bag, and the coil 22 is energized at the same time. Under the magnetic force of the yoke 21, the valve core assembly 4 moves towards the coil 22 and eventually abuts against the protrusion 212. The valve core assembly 4 also blocks the third opening 721 of the second medium flow channel 72, thus the first medium flow channel 71 and the second medium flow channel 72 are not connected, the solenoid valve is closed, and the gas in the airbag cannot be discharged through the solenoid valve. When the electronic blood pressure monitor deflates, the coil 22 is de-energized, the magnetic force of the yoke 21 disappears, and under the elastic force of the elastic element 31, the valve core assembly 4 moves away from the coil 22 and eventually abuts against the bottom wall 111 of the first groove 11. At this time, the first medium flow channel 71 and the second medium flow channel 72 are connected through the first groove 11, the solenoid valve is open, and the gas in the airbag can be discharged through the solenoid valve. The second medium flow channel 72 is the gas inlet of the solenoid valve, and the first medium flow channel 71 is the gas outlet of the solenoid valve.

[0171] It is understood that in some other embodiments, the first medium flow channel 71 can also be connected to the airbag, and the solenoid valve works in the same way as above, except that the direction of gas flow is different when the airbag deflates. For the sake of simplicity, it will not be described in detail here.

[0172] In this example, when coil 22 is energized, the solenoid valve is in the closed state, ensuring the sealing of the pipeline containing the solenoid valve and thus maintaining the pressure in that pipeline. When coil 22 is de-energized, the solenoid valve is in the open state, releasing the pressure in the pipeline containing the solenoid valve. When coil 22 is never energized, the solenoid valve is in the normally open state.

[0173] In other embodiments, when the coil 22 is not energized, the elastic element 31 drives the valve core assembly 4 to block the first medium flow channel 71, thereby isolating the passage between the first medium flow channel 71 and the second medium flow channel 72. When the coil 22 is energized, the magnetized yoke 21 drives the valve core assembly 4 to open the first medium flow channel 71, thereby connecting the first medium flow channel 71 and the second medium flow channel 72.

[0174] For ease of understanding, the following example uses the first medium flow channel 71 connected to the airbag, combined with... Figure 6The working process of the solenoid valve is described below. When the electronic blood pressure monitor is not working, the coil 22 is not energized. Under the elastic force of the elastic element 31, the valve core assembly 4 abuts against the bottom wall 111 of the first groove 11, blocking the first opening 711 of the first medium flow channel 71. Therefore, the first medium flow channel 71 and the second medium flow channel 72 are not connected, and the solenoid valve is in the closed state. When the electronic blood pressure monitor is inflating, for example, when the user clicks the measurement button on the electronic blood pressure monitor display or presses the measurement button on the electronic blood pressure monitor, the air pump inflates the air bag, while the coil 22 remains de-energized. The solenoid valve is in the closed state, and the gas in the air bag cannot be discharged through the solenoid valve. When the electronic blood pressure monitor is deflated, the coil 22 is energized. Under the magnetic force of the yoke 21, the valve core assembly 4 moves toward the coil 22 and eventually abuts against the protrusion 212. The valve core assembly 4 does not block the first opening 711 of the first medium flow channel 71, nor does it block the third opening 721 of the second medium flow channel 72. Therefore, the first medium flow channel 71 and the second medium flow channel 72 are connected through the first groove 11. The solenoid valve is in the open state, and the gas in the airbag can be discharged through the solenoid valve. The first medium flow channel 71 is the gas inlet of the solenoid valve, and the second medium flow channel 72 is the gas outlet of the solenoid valve.

[0175] It is understood that in some other embodiments, the second medium flow channel 72 can also be connected to the airbag, and the solenoid valve works in the same way as above, except that the direction of gas flow is different when the airbag deflates. For the sake of simplicity, it will not be described in detail here.

[0176] In this example, when coil 22 is energized, the solenoid valve is in the open state, which can release the pressure in the pipeline where the solenoid valve is located. When coil 22 is de-energized, the solenoid valve is in the closed state, which can ensure the sealing of the pipeline where the solenoid valve is located and thus maintain the pressure in the pipeline where the solenoid valve is located. When coil 22 is never energized, the solenoid valve is in the normally closed state.

[0177] In some embodiments, the elastic element 31 may be a spring, a bellows, an elastic block, or other components made of elastic materials (such as spring steel, rubber, latex, etc.). When the elastic element 31 is a spring, it may specifically be a metal spring, such as a cylindrical helical spring, a conical helical spring, a convex helical spring, a concave helical spring, a wave spring, a disc spring, etc., or it may be a non-metallic spring, such as an air spring or a rubber spring.

[0178] Among them, cylindrical helical springs have a constant spring diameter and pitch, and their spring characteristics are linear. Conical helical springs, convex helical springs, and concave helical springs are all variable diameter helical springs, with good buffering performance. Wave springs (abbreviated as wave springs) are elastic elements with several peaks and valleys on a thin metal ring. Disc springs, also known as Belleville spring washers, are conical discs that can be used individually, in series, or in parallel, bearing static or dynamic loads along the axial direction at the upper inner edge and lower outer edge. Air springs are springs that utilize the compressibility of air to achieve elasticity by filling a retractable sealed container with compressed air. Rubber springs are a type of polymer elastomer, made from common rubber, with large elastic deformation, strong restoring ability, and the ability to absorb vibrations, impacts, and noise generated by machine operation. Bellows are tubular elastic elements made of foldable corrugated sheets connected along the folding and stretching direction.

[0179] The elastic element 31 has good elastic deformation capability, and is simple to process and easy to arrange. When the coil 22 is not energized, the elastic element 31 drives the valve core assembly 4 to move and keeps the valve core assembly 4 in a stable state, which can provide good reliability.

[0180] In some embodiments, reference Figure 5 or Figure 6 As shown, the valve core assembly 4 may include a seal 41 and a partition 42, wherein the seal 41 is used to block the first medium flow channel 71 or the second medium flow channel 72, and the partition 42 is used to drive the seal 41 to move under the drive of the electromagnetic assembly 2 or the reset assembly 3, so as to block the first medium flow channel 71 or the second medium flow channel 72.

[0181] For example, with Figure 5Taking the structure shown as an example, the reset assembly 3 includes an elastic element 31. When the coil 22 is energized, the coil 22 generates a magnetic field, which polarizes the yoke 21, causing the yoke 21 to generate a magnetic force. At this time, the magnetic force of the yoke 21 is greater than the elastic force of the elastic element 31, so that the yoke 21 can attract the partition 42 to move towards the coil 22. Correspondingly, the partition 42 drives the sealing element 41 to also move towards the coil 22. When the partition 42 reaches the first stable state, for example, when the partition 42 abuts against the protrusion 212, the position of the sealing element 41 can be positioned, that is, the movement of the sealing element 41 is restricted, and the sealing element 41 remains in the state of blocking the second medium flow channel 72, that is, the sealing element 41 remains in the state of blocking the solenoid valve flow channel (or pipeline). When the coil 22 is de-energized, the magnetic field of the coil 22 disappears, the magnetic force of the yoke 21 disappears, and the partition 42 moves away from the coil 22 under the action of the elastic force of the elastic element 31. Correspondingly, the partition 42 drives the sealing element 41 to also move away from the coil 22. When the partition 42 reaches the second stable state, for example, when the partition 42 abuts against the bottom wall 111 of the first groove 11, the position of the seal 41 can be positioned, that is, the movement of the seal 41 is restricted, wherein the seal 41 does not block the second medium flow channel 72 and does not block the first medium flow channel 71, that is, the seal 41 remains in the state of opening the solenoid valve flow channel (or pipeline).

[0182] For example, with Figure 6 Taking the structure shown as an example, the reset assembly 3 includes an elastic element 31. When the coil 22 is energized, the coil 22 generates a magnetic field, which polarizes the yoke 21, causing the yoke 21 to generate a magnetic force. At this time, the magnetic force of the yoke 21 is greater than the elastic force of the elastic element 31, so that the yoke 21 can attract the partition 42 to move towards the coil 22. Correspondingly, the partition 42 drives the sealing element 41 to also move towards the coil 22. When the partition 42 reaches the second stable state, for example, when the partition 42 abuts against the protrusion 212, the position of the sealing element 41 can be positioned, wherein the sealing element 41 does not block the second medium flow channel 72 and does not block the first medium flow channel 71, that is, the sealing element 41 remains in the state of opening the solenoid valve flow channel (or pipeline). When the coil 22 is de-energized, the magnetic field of the coil 22 disappears, the magnetic force of the yoke 21 disappears, and the partition 42 moves away from the coil 22 under the action of the elastic force of the elastic element 31. Correspondingly, the partition 42 drives the sealing element 41 to also move away from the coil 22. When the partition 42 reaches the first stable state, for example, when the partition 42 abuts against the bottom wall 111 of the first groove 11, the position of the seal 41 can be positioned, wherein the seal 41 is kept in the state of blocking the first medium flow channel 71, that is, the seal 41 is kept in the state of blocking the solenoid valve flow channel (or pipeline).

[0183] In some embodiments, the seal 41 and the partition 42 can be fixedly connected. For example, the partition 42 can be fixedly connected to the seal 41 by welding, snap-fitting, bonding, threaded connection, key connection, pin connection, interference fit, etc. By way of example and not limitation, the partition 42 can be sleeved on the seal 41 and fixed together with the seal 41 by at least one of the above methods. In this way, the seal 41 and the partition 42 can be made of different materials for their respective functions.

[0184] In other embodiments, the seal 41 and the partition 42 can be integrally formed. This simplifies the assembly process of the valve core assembly 4 and reduces assembly difficulty.

[0185] In some embodiments, the seal 41 may be made of metallic materials (such as aluminum, lead, indium, stainless steel, etc.), non-metallic materials (such as rubber, silicone, plastic, ceramics, graphite, synthetic resin, etc.), or composite materials (such as rubber-asbestos board, aerogel felt-polyurethane, etc.). For example, the seal 41 may be made of elastic materials (such as rubber, thermoplastic elastomers, etc.), thus giving it a certain degree of elasticity. When sealing the first medium flow channel 71 or the second medium flow channel 72, the seal 41 undergoes a certain deformation, resulting in good sealing performance.

[0186] In some embodiments, if the seal 41 is used to block the second medium flow channel 72, the end of the seal 41 near the second medium flow channel 72 (or near the third opening 721) can protrude relative to the partition 42 toward the third opening 721, which is beneficial for the seal 41 to form a good seal at the third opening 721.

[0187] For example, refer to Figure 5 As shown, a second groove 81 can be provided on the side of the protrusion 212 (e.g., the first protrusion 2121) facing the bottom wall 111 of the first groove 11. The second medium flow channel 72 communicates with the second groove 81 and forms a third opening 721 on the bottom wall of the second groove 81. In other words, the second medium flow channel 72 can communicate with the first groove 11 through the second groove 81. The second groove 81 is used to accommodate the portion of the sealing member 41 that protrudes relative to the partition 42 toward the third opening 721. In this way, while satisfying the sealing performance of the sealing member 41, the thickness of the solenoid valve in the direction of engagement between the housing 1 and the yoke 21 can be reduced, which is beneficial to the miniaturization of the solenoid valve. Furthermore, the sealing member 41 has a larger size in the engagement direction, which allows for a larger amount of deformation and can achieve a better sealing effect. In addition, when sealing, a small current can be passed through the coil 22 to achieve a good sealing effect, thus reducing the power consumption of the solenoid valve.

[0188] Understandably, in this configuration, the radial dimension (e.g., diameter) of the portion of the seal 41 protruding from the partition 42 toward the third opening 721 is greater than the radial dimension (e.g., diameter) of the third opening 721, thus ensuring that the seal 41 can block the third opening 721. Furthermore, a certain gap exists between the portion of the seal 41 protruding from the partition 42 toward the third opening 721 and the sidewall of the second groove 81, preventing friction between them from affecting the movement of the partition 42.

[0189] In some embodiments, if the seal 41 is used to block the first medium flow channel 71, the end of the seal 41 near the first medium flow channel 71 (or near the first opening 711) can protrude relative to the partition 42 toward the first opening 711, which is beneficial for the seal 41 to form a good seal at the first opening 711.

[0190] For example, refer to Figure 6 As shown, a third groove 82 can be provided on the side of the housing 1 facing the magnetic yoke 21. The opening of the third groove 82 is located on the bottom wall 111 of the first groove 11, meaning that the third groove 82 and the first groove 11 can form a stepped groove. Alternatively, the bottom wall 111 of the first groove 11 is provided with the third groove 82. The first medium flow channel 71 communicates with the third groove 82 and forms a first opening 711 on the bottom wall of the third groove 82. In other words, the first medium flow channel 71 can communicate with the first groove 11 through the third groove 82. The third groove 82 is used to accommodate the portion of the sealing member 41 that protrudes relative to the partition 42 toward the first opening 711. In this way, while satisfying the sealing performance of the sealing member 41, the thickness of the solenoid valve in the direction of engagement between the housing 1 and the magnetic yoke 21 can be reduced, which is beneficial for miniaturizing the solenoid valve.

[0191] Understandably, in this configuration, the radial dimension (e.g., diameter) of the portion of the seal 41 protruding from the partition 42 toward the first opening 711 is greater than the radial dimension (e.g., diameter) of the first opening 711, thus ensuring that the seal 41 can block the first opening 711. Furthermore, a certain gap exists between the portion of the seal 41 protruding from the partition 42 toward the first opening 711 and the sidewall of the third groove 82, preventing friction between them from affecting the movement of the partition 42.

[0192] In some embodiments, the end of the seal 41 near the unsealed medium flow channel may also protrude relative to the partition 42 toward the opening of the unsealed medium flow channel.

[0193] For example, refer to Figure 5If the seal 41 is used to block the second medium flow channel 72, the end of the seal 41 near the first medium flow channel 71 (or near the first opening 711) can protrude relative to the partition 42 toward the first opening 711. The radial dimension of the first opening 711 should be greater than the radial dimension of the portion of the seal 41 protruding relative to the partition 42 toward the first opening 711. Thus, when the partition 42 moves the seal 41 toward the first opening 711 and reaches a stable state, the seal 41 will not block the first opening 711, maintaining communication between the first medium flow channel 71 and the second medium flow channel 72.

[0194] Similarly, when the seal 41 is used to block the first medium flow channel 71, the end of the seal 41 near the second medium flow channel 72 (or near the third opening 721) may protrude relative to the partition 42 toward the third opening 721, wherein the radial dimension of the third opening 721 should be greater than the radial dimension of the portion of the seal 41 protruding relative to the partition 42 toward the third opening 721.

[0195] For example, refer to Figure 6 If the seal 41 is used to block the first medium flow channel 71, the end of the seal 41 near the second medium flow channel 72 (or near the third opening 721) can protrude relative to the partition 42 toward the third opening 721. When the partition 42 abuts against the protrusion 212 and reaches a stable state, the distance between the protruding part of the seal 41 relative to the partition 42 toward the third opening 721 and the third opening 721 should be greater than 0. In this way, when the partition 42 drives the seal 41 to move toward the third opening 721 and reaches a stable state, the seal 41 will not block the third opening 721, thus maintaining the communication between the first medium flow channel 71 and the second medium flow channel 72.

[0196] Similarly, when the seal 41 is used to block the second medium flow channel 72, the end of the seal 41 near the first medium flow channel 71 (or near the first opening 711) can protrude relative to the partition 42 toward the first opening 711. When the partition 42 abuts against the bottom wall 111 of the first groove 11 and reaches a stable state, the distance between the part of the seal 41 protruding relative to the partition 42 toward the first opening 711 and the first opening 711 should be greater than 0.

[0197] In some embodiments, if the seal 41 is used to block the first medium flow channel 71, when the valve core assembly 4 abuts against the protrusion 212, the portion of the seal 41 protruding toward the second medium flow channel 72 relative to the partition 42 can be at least partially received in the second medium flow channel 72, and there is a gap between the inner wall of the second medium flow channel 72 and the seal 41. In this way, the seal 41 will not block the opening of the second medium flow channel 72.

[0198] In some embodiments, if the seal 41 is used to block the second medium flow channel 72, when the valve core assembly 4 abuts against the bottom wall 111 of the first groove 11, the portion of the seal 41 protruding from the partition 42 toward the first medium flow channel 71 can be at least partially received in the first medium flow channel 71, and there is a gap between the inner wall of the first medium flow channel 71 and the seal 41. In this way, the seal 41 will not block the opening of the first medium flow channel 71.

[0199] In some embodiments, the partition 42 may include a magnetic material, such as a permanent magnet or a soft magnetic material. Thus, when the coil 22 is energized, the partition 42 can be attracted by the magnetized yoke 21 and move.

[0200] In some embodiments, the partition 42 is flat. On the one hand, the partition 42 occupies less space, which can reduce the thickness of the solenoid valve in the direction of engagement between the housing 1 and the yoke 21, thus facilitating the miniaturization of the solenoid valve. On the other hand, the flat partition 42 can ensure a closed-loop magnetic circuit, thereby ensuring unobstructed magnetic circuit.

[0201] In some embodiments, reference Figure 4 As shown, at least one through hole 411 can be provided on the partition 42. The through hole 411 is used to connect the first medium flow channel 71 and the second medium flow channel 72 when pressure is released. For example, the first opening 711 of the first medium flow channel 71 and the third opening 721 of the second medium flow channel 72 are respectively located on both sides of the partition 42. That is, when the first opening 711 of the first medium flow channel 71 is provided on the bottom wall 111 of the first groove 11, the through hole 411 can be provided on the partition 42 to connect the passage on the housing 1 and the magnetic yoke 21.

[0202] In some embodiments, reference Figure 5 or Figure 6 As shown, a protrusion 43 may be provided on the bottom wall 111 of the first groove 11. When the coil 22 is not energized or de-energized, the partition 42 can abut against the protrusion 43 under the action of the reset assembly 3. In this way, there is a certain gap between the partition 42 and the part of the bottom wall 111 of the first groove 11 without the protrusion 43, which can provide sufficient space for the flow of the working medium when the solenoid valve is in the open state, which is conducive to rapid pressure relief. In addition, the partition 42 and the bottom wall 111 of the first groove 11 abut against each other through the protrusion 43, which can avoid the parallelism problem caused by large-area support.

[0203] It is understandable that when the partition 42 abuts against the protrusion 43, the protrusion 43 and the through hole 411 are misaligned. For example, the projection of the protrusion 43 in the fastening direction does not overlap with the projection of the through hole 411 in the fastening direction, so as to avoid the protrusion 43 blocking the through hole 411.

[0204] In some embodiments, the protrusion 43 may also be provided on the surface of the partition 42 facing the bottom wall 111 of the first groove 11, and the partition 42 abuts against the bottom wall 111 of the first groove 11 through the protrusion 43. In this way, space for the flow of working medium can be left between the partition 42 and the bottom wall 111 of the first groove 11.

[0205] In some embodiments, the protrusion 43 provided on the bottom wall 111 of the first groove 11 or on the partition 42 can be an integral annular component, or include multiple dispersed sub-parts (such as arranged in a ring array). This allows the partition 42 to be subjected to more even force.

[0206] In other embodiments, the protrusion 43 may not be provided on the bottom wall 111 of the first groove 11 or the partition 42. Instead, a connecting channel is provided on the housing 1 to connect the through hole 411 and the first medium flow channel 71. In this way, when the partition 42 abuts against the bottom wall 111 of the first groove 11, the working medium can reach the first medium flow channel 71 through the through hole 411 and the connecting channel provided on the housing 1.

[0207] In some embodiments, the through hole 411 may not be provided on the partition 42. For example, the first opening 711 of the first medium flow channel 71 and the third opening 721 of the second medium flow channel 72 are located on the same side of the partition 42. That is, when the first opening 711 of the first medium flow channel 71 is provided on the side wall 112 of the first groove 11, during pressure relief, the working medium can flow from the inlet to the outlet through the gap between the valve core assembly 4 and the protrusion 212 and the gap between the side wall 112 of the first groove 11 and the protrusion 212, without having to pass through the partition 42.

[0208] The above text combined Figures 4 to 6 One setting method for reset component 3 is introduced below, in conjunction with... Figures 7 to 9 This section introduces another setting method for reset component 3, in which... Figure 7 An exploded view of a solenoid valve provided in an embodiment of this application is shown. Figure 8 and Figure 9 A cross-sectional schematic diagram of a solenoid valve according to an embodiment of this application is shown. The following will mainly describe... Figures 7 to 9 The solenoid valve 600 in the illustrated embodiment and Figures 4 to 6 The differences between the solenoid valve 500 in the illustrated embodiment and other components or parts not described in detail can be found in the references. Figures 4 to 6 Description of the corresponding parts in the illustrated embodiment.

[0209] As another example, the reset component 3 can be located on the side of the valve core assembly 4 away from the solenoid component 2, that is, the reset component 3 and the solenoid component 2 can be located on different sides of the valve core assembly 4.

[0210] refer to Figures 7 to 9The reset assembly 3 may include a magnetic element 32 disposed within the housing 1. For example, the housing 1 may have a second receiving space 83 for accommodating the magnetic element 32, which may be located near the bottom wall 111 of the first groove and correspond to the position of the valve core assembly 4. By way of example and not limitation, the housing 1 may include a second body 12 and an extension 13 extending from the periphery (or edge) of the second body 12 toward the yoke 21. The second body 12 and the extension 13 may form a first groove 11 with an opening facing the yoke 21. The second body 12 has a second receiving space 83 for accommodating the magnetic element 32. For a detailed description of the yoke 21, coil 22, first medium flow channel 71, second medium flow channel 72, and first groove 11, please refer to the corresponding descriptions above; for brevity, they will not be repeated here.

[0211] In some embodiments, the magnetic component 32 can be embedded in the housing 1 using an insert injection molding process. Insert injection molding is a process in which the insert is pre-fixed in an appropriate position in an injection mold, and then plastic is injected to form the mold. After the mold is opened, the insert is tightly encased and embedded in the cooled and solidified plastic to obtain an article with the insert. This integrated product avoids the addition of new sealing interfaces, which is beneficial to improving the sealing performance of the solenoid valve, without affecting the performance of the magnetic component 32.

[0212] Of course, in other embodiments, the second body 12 may include a first part and a second part, which can be engaged to form a second receiving space 83 for receiving the magnetic component 32.

[0213] The valve core assembly 4 includes a magnetic material. In this embodiment, when the coil 22 is not energized (i.e., the coil 22 is not working), the valve core assembly 4 is attracted by the magnetic element 32 and abuts against the bottom wall 111 of the first groove 11 under the magnetic force of the magnetic element 32. When the coil 22 is energized (i.e., the coil 22 is working), the magnetic material of the valve core assembly 4 can be attracted by the magnetized yoke 21. The magnetic attraction force of the yoke 21 is greater than that of the magnetic element 32. Therefore, the magnetized yoke 21 can overcome the magnetic attraction force of the magnetic element 32 and attract the valve core assembly 4, thereby driving the valve core assembly 4 to move towards the coil 22. When the coil 22 is de-energized (i.e., the coil 22 is not working), the magnetic field of the coil 22 disappears. Under the magnetic force of the magnetic element 32, the valve core assembly 4 moves towards the bottom wall 111 of the first groove 11, that is, moves away from the coil 22, and finally abuts against the bottom wall 111 of the first groove 11.

[0214] In some embodiments, reference Figure 8When coil 22 is energized, the magnetized yoke 21 can overcome the magnetic attraction between the magnetic component 32 and the valve core assembly 4, thereby causing the valve core assembly 4 to block the second medium flow channel 72 and disconnect the passage between the first medium flow channel 71 and the second medium flow channel 72. When coil 22 is not energized, the magnetic attraction between the magnetic component 32 and the valve core assembly 4 can cause the valve core assembly 4 to open the second medium flow channel 72, thereby connecting the first medium flow channel 71 and the second medium flow channel 72.

[0215] Figure 8 The working process of the solenoid valve shown is similar to Figure 5 The solenoid valves shown operate similarly, except that: Figure 5 In the solenoid valve structure shown, the valve core assembly 4 moves or remains in a stable state under the action of the elastic force of the elastic element 31 and the magnetic attraction between the magnetic yoke 21 and the valve core assembly 4 (specifically the partition 42 in the valve core assembly 4) after the coil 22 is energized. Figure 8 In the solenoid valve structure shown, the valve core assembly 4 moves or remains in a stable state under the magnetic attraction between the magnetic component 32 and the valve core assembly 4 (specifically, the partition 42 in the valve core assembly 4) and the magnetic attraction between the magnetic yoke 21 and the valve core assembly 4 after the coil 22 is energized. Regarding Figure 8 The working process of the solenoid valve shown can be referenced. Figure 5 The relevant descriptions in the document are for the sake of brevity and will not be repeated here.

[0216] In other embodiments, reference is made to Figure 9 When coil 22 is not energized, the magnetic attraction between magnetic component 32 and valve core assembly 4 can cause valve core assembly 4 to block the first medium flow channel 71, thereby isolating the passage between the first medium flow channel 71 and the second medium flow channel 72. When coil 22 is energized, the magnetized yoke 21 can overcome the magnetic attraction between magnetic component 32 and valve core assembly 4, thereby causing valve core assembly 4 to open the first medium flow channel 71, thereby connecting the first medium flow channel 71 and the second medium flow channel 72.

[0217] Figure 9 The working process of the solenoid valve shown is similar to Figure 6 The solenoid valves shown operate similarly, except that: Figure 6 In the solenoid valve structure shown, the valve core assembly 4 moves or remains in a stable state under the action of the elastic force of the elastic element 31 and the magnetic attraction between the magnetic yoke 21 and the valve core assembly 4 (specifically the partition 42 in the valve core assembly 4) after the coil 22 is energized. Figure 9 In the solenoid valve structure shown, the valve core assembly 4 moves or remains in a stable state under the magnetic attraction between the magnetic component 32 and the valve core assembly 4 (specifically, the partition 42 in the valve core assembly 4) and the magnetic attraction between the magnetic yoke 21 and the valve core assembly 4 after the coil 22 is energized. Regarding Figure 9The working process of the solenoid valve shown can be referenced. Figure 6 The relevant descriptions in the document are for the sake of brevity and will not be repeated here.

[0218] In this embodiment, when the reset component 3 uses a magnetic element 32, the valve core component 4 moves under the action of magnetic force. This makes the force on the valve core component 4 more uniform and the movement more stable. In addition, the side wall 112 of the first groove 11 can guide the movement of the partition 42, which can avoid tilting and jamming, making the movement of the valve core component 4 smoother. This helps to optimize, solve or avoid problems such as solenoid valve jamming, poor partition adsorption, slow air release, and solenoid valve leakage. In addition, when the magnetic element 32 is used as the reset component, the outer periphery of the protrusion 212 and the side wall 112 of the first groove 11 can be tightly fitted (e.g., connected together) or a small gap can be set between them. This can reduce the size of the solenoid valve and facilitate the miniaturization of the solenoid valve.

[0219] In some embodiments, when the outer periphery of the protrusion 212 is connected to the sidewall 112 of the first groove 11, no step may be provided between the first body 211 and the protrusion 212, and correspondingly, the outer periphery of the first body 211 is flush with the outer periphery of the protrusion 212.

[0220] In some embodiments, when the valve core assembly 4 includes a seal 41 and a partition 42, the magnetic element 32 is located above the partition 42. In other words, the projection of the magnetic element 32 in the engagement direction of the housing 1 and the yoke 21 at least partially overlaps with the projection of the partition 42 in the engagement direction of the housing 1 and the yoke 21. This effectively utilizes the magnetic force of the magnetic element 32, making the force on the partition 42 more uniform and its movement smoother, and also improving the sealing effect of the seal 41.

[0221] In some embodiments, the magnetic element 32 comprises a permanent magnet material or a soft magnetic material. In this embodiment, in order for the magnetic element 32 to attract the valve core assembly 4 (specifically, the partition 42), at least one of the magnetic element 32 and the valve core assembly 4 comprises a permanent magnet material. For example, the magnetic element 32 is a permanent magnet and the partition 42 is a soft magnet; or, the magnetic element 32 is a soft magnet and the partition 42 is a permanent magnet; or both the magnetic element 32 and the partition 42 are permanent magnets.

[0222] In some embodiments, at least one second receiving space 83 may be provided on the housing 1, and the reset assembly 3 may include at least one magnetic element 32, wherein the at least one second receiving space 83 corresponds one-to-one with the at least one magnetic element 32. Specifically, one of the at least one second receiving spaces 83 is used to receive one of the at least one magnetic elements 32.

[0223] As an example, a plurality of second receiving spaces 83 may be provided on the housing 1. The plurality of second receiving spaces 83 may be arranged in a ring array (such as a circular ring, a square ring, a triangular ring, etc.). Correspondingly, the magnetic components 32 housed in the plurality of second receiving spaces 83 may form a magnet array.

[0224] As another example, a second receiving space 83 can be provided on the housing 1. Exemplarily, the second receiving space 83 can be annular (such as a circular ring, square ring, triangular ring, etc.), and the magnetic component 32 housed in the second receiving space 83 can be a ring magnet. The integrated ring magnet is easy to install and can improve the assembly efficiency of the solenoid valve.

[0225] As another example, the reset component 3 can be disposed on both the side of the valve core assembly 4 facing the electromagnetic component 2 and the side facing away from the electromagnetic component 2; that is, the reset component 3 can be disposed on both sides of the valve core assembly 4. For example, combined with Figures 4 to 6 as well as Figures 7 to 9 The reset assembly 3 may include an elastic element 31 and a magnetic element 32, wherein the elastic element 31 and the coil 22 are disposed on the same side of the valve core assembly 4, and the magnetic element 32 and the coil 22 are disposed on different sides of the valve core assembly 4. Accordingly, the operation process of the solenoid valve can be referred to the above description. Figures 4 to 9 For the sake of brevity, the relevant descriptions will not be repeated here.

[0226] When the reset assembly 3 includes both the elastic element 31 and the magnetic element 32, it can provide double protection for the reset of the valve core assembly 4 and reduce the failure rate of the reset assembly 3.

[0227] In this embodiment, of the first medium flow channel 71 and the second medium flow channel 72 mentioned above, one flow channel is the inlet flow channel of the solenoid valve, and the other is the outlet flow channel. When the working medium is gas, one of the first medium flow channel 71 and the second medium flow channel 72 is an inlet flow channel, and the other is an outlet flow channel. When the working medium is liquid, one of the first medium flow channel 71 and the second medium flow channel 72 is a liquid inlet flow channel, and the other is a liquid outlet flow channel.

[0228] In some embodiments, reference Figures 4 to 9 The solenoid valves provided in the embodiments of this application, such as solenoid valve 500 or solenoid valve 600, may also include an electrical connector 5, which is used to electrically connect to coil 22, thereby providing an electrical signal to coil 22.

[0229] In some embodiments, the electrical connector 5 may be fixed to the outer wall of the housing 1 (e.g., the second outer wall 142).

[0230] In some embodiments, with Figure 9For example, the magnetic yoke 21 may be provided with a wiring hole 84 communicating with the first receiving space 213. The wiring hole 84 is used for electrical connection between the electrical connector 5 and the coil 22 housed in the first receiving space 213. For example, the coil lead can pass through the wiring hole 84 and be soldered to the electrical connector 5.

[0231] In some embodiments, the wiring hole 84 can be sealed by applying adhesive, double-sided tape, or deformable materials to ensure the sealing performance of the solenoid valve.

[0232] In some embodiments, reference Figures 4 to 9 The solenoid valves provided in this application embodiment, such as solenoid valve 500 or solenoid valve 600, may also include a dustproof component 6. When the solenoid valve is miniaturized, it becomes more sensitive to particulate matter. The dustproof component 6 can prevent dust and other foreign objects from entering the interior of the solenoid valve, thus avoiding affecting the normal function of the solenoid valve.

[0233] In some embodiments, the dustproof assembly 6 may include a mesh with micropores to block dust. Here, the working medium of the solenoid valve can pass through the dustproof assembly 6.

[0234] In some embodiments, the dustproof component 6 may be disposed in the inlet and / or outlet flow channels of the solenoid valve. For example, see reference... Figure 5 , Figure 6 , Figure 8 or Figure 9 The first medium flow channel 71 can be an outlet flow channel, and the dustproof component 6 can be disposed at the opening 71 of the first medium flow channel 71 connecting to the outside of the housing 1, i.e., the second opening 712. The second medium flow channel 72 is an inlet flow channel, and the dustproof component 6 can also be disposed at the opening 72 of the second medium flow channel 72 connecting to the airbag, such as the fourth opening 722. Of course, in some other embodiments, the dustproof component 6 can also be disposed in the air path between the inlet flow channel of the solenoid valve and the airbag.

[0235] In some embodiments, the dustproof component 6 can be fixed to the solenoid valve (specifically, the housing 1) by adhesive bonding, welding, snap-fitting, or other fixing methods.

[0236] In some embodiments, with Figure 9 For example, the first outer wall 141 of the housing 1 may be provided with a fourth groove 85 with an opening facing away from the valve core assembly 4. The first medium flow channel 71 communicates with the fourth groove 85 and forms a second opening 712 on the bottom wall of the fourth groove 85. The fourth groove 85 is used to accommodate the dustproof assembly 6. In this way, the dustproof assembly 6 is hidden inside the housing 1, which can reduce the thickness of the solenoid valve in the direction of engagement between the housing 1 and the magnetic yoke 21, which is beneficial to the miniaturization of the solenoid valve. Similarly, the fourth groove 85 may also be provided on the side of the first body 211 facing away from the protrusion 212, so as to install the dustproof assembly at the second medium flow channel 72.

[0237] The above combination Figures 3 to 9 This application describes the structure of a solenoid valve provided in an embodiment. In this embodiment, the overall size of the solenoid valve can be reduced by simplifying the components. This is intended as an example and not a limitation. Figure 3 As shown, the solenoid valve provided in this embodiment can be approximately cylindrical, with a minimum diameter of 4mm-8mm, such as 4.5mm, 5mm, 6mm, or 7.5mm, and a minimum height of 2mm-4mm, such as 3mm or 3.5mm. Miniaturization of the solenoid valve can reduce the space it occupies within electronic devices, thus facilitating the miniaturization of electronic devices. However, it is understandable that... Figure 3 The shape of the solenoid valve shown is merely exemplary. The appearance of the solenoid valve can also be designed into other shapes according to actual needs, such as square, etc. This application embodiment does not limit this.

[0238] Figures 10 to 12 A schematic structural diagram of a pressure-increasing / depressurizing assembly provided in an embodiment of this application is shown. Figure 10 This illustration shows an assembly diagram of a pressure-relieving assembly provided in an embodiment of this application. Figure 11 An exploded view of a pressure-releasing assembly provided in an embodiment of this application is shown. Figure 12 A cross-sectional schematic diagram of a pressure-releasing assembly provided in an embodiment of this application is shown.

[0239] refer to Figures 10 to 12 As shown, the pressure relief assembly 700 may include a solenoid valve 701, a base 702, and a pressure bladder 703. The solenoid valve 701 is connected to the base 702, which connects the pressure bladder 703 and the solenoid valve 701. In this embodiment, of the first medium flow channel 71 and the second medium flow channel 72, one is the inlet flow channel of the solenoid valve 701, and the other is the outlet flow channel of the solenoid valve 701. The base 702 is connected to the component where the inlet flow channel (i.e., the non-outlet flow channel) of the solenoid valve 701 is located. For example, the second medium flow channel 72 is the inlet flow channel of the solenoid valve 701, and the first medium flow channel 71 is the outlet flow channel of the solenoid valve 701. Accordingly, the base 702 is connected to the magnetic yoke 21 of the solenoid valve 701.

[0240] Solenoid valve 701 can be either solenoid valve 500 or solenoid valve 600 as described above. For a brief description of solenoid valve 701, please refer to the relevant descriptions of solenoid valve 500 or solenoid valve 600. For the sake of brevity, it will not be repeated here.

[0241] refer to Figure 11 or Figure 12A third medium flow channel 73 is provided on the base 702. This third medium flow channel 73 includes a fifth opening 731 and a sixth opening 732. The fifth opening 731 is located on the surface of the base 702 facing the magnetic yoke 21 and is opposite to the fourth opening 722 of the second medium flow channel 72. The sixth opening 732 is located on other surfaces of the base 702 besides the surface connected to the magnetic yoke 21. The third medium flow channel 73 is located inside the base 702, meaning that the base 702 alone can form a complete third medium flow channel 73. This improves the sealing performance of the pipeline and simplifies assembly. Furthermore, since the first medium flow channel 71, the second medium flow channel 72, and the third medium flow channel 73 are all flow channels opened inside the component, the flow path can be designed according to actual needs. This eliminates the need for piping at the solenoid valve 701 via a sleeve, allowing for a more regular shape of the solenoid valve 701 and the entire pressure relief assembly, reducing overall size and making it suitable for the space constraints of electronic devices such as wearable products.

[0242] In this embodiment, the third medium flow channel 73 (specifically the sixth opening 732) in the substrate 702 can be directly or indirectly connected to the outlet of the pressure bladder 703. When the third medium flow channel 73 is indirectly connected to the outlet of the pressure bladder 703, other components with medium flow channels can also be provided between the substrate 702 and the pressure bladder 703 to connect the third medium flow channel 73 and the pressure bladder. This embodiment does not limit this.

[0243] The connection between the base 702 and the solenoid valve 701 can be detachable or non-detachable, and this embodiment of the application does not limit this. For example, the base 702 and the solenoid valve 701 can be fixedly connected by means of bonding, welding, snap-fitting, threaded connection, etc. In some embodiments, the base 702 can also be part of the solenoid valve 701, that is, the solenoid valve 701 can also include the base 702, and the third medium flow channel 73 provided on the base 702 communicates with the non-outlet flow channel in the first medium flow channel 71 and the second medium flow channel 72.

[0244] In this embodiment, when the substrate 702 is connected to the magnetic yoke 21, since the magnetic yoke is made of metal, the surface on which it is connected to the substrate 702 can have good flatness, which makes it easy to ensure the sealing performance when the substrate 702 and the magnetic yoke 21 are connected.

[0245] In some embodiments, the pressure bladder 703 can be inflated with gas, in which case the pressure bladder 703 is an air bladder. The inflation / deflation assembly 700 provided in this application embodiment can be applied to electronic blood pressure monitors such as... Figure 2 The electronic device 410 or 420 shown is combined with Figure 2 The specific working process, including the corresponding accompanying drawings, can be described as follows.

[0246] Scenario 1: After the solenoid valve coil 22 is energized, it is used to block the second medium flow channel 72. (Refer to...) Figure 5 or Figure 8 .

[0247] When the electronic blood pressure monitor is inflating, for example, when the user clicks the measurement button on the monitor's display or presses the measurement button on the monitor, the processor 402 controls the air pump 4011 to inflate the pressure bladder 703. Simultaneously, it energizes the coil 22, magnetizing the yoke 21 and causing it to overcome the force of the reset assembly 3, attracting the valve core assembly 4 towards the coil 22. Once the valve core assembly 4 reaches a stable state, it blocks the third opening 721 of the second medium flow channel 72, keeping the air passage of the solenoid valve sealed from the air passage of the base 702. At this time, the gas in the pressure bladder 703 cannot be discharged through the solenoid valve.

[0248] When the electronic blood pressure monitor is deflating, for example, if the processor 402 detects that the measurement is complete or has obtained the measurement result, the processor 402 can control the coil 22 to be de-energized, causing the magnetic force of the yoke 21 to disappear. Under the action of the reset component 3, the valve core assembly 4 moves away from the coil 22. When the valve core assembly 4 reaches a stable state, the valve core assembly 4 does not block the third opening 721 of the second medium flow channel 72, that is, the third opening 721 is in the open state. The air passage of the solenoid valve is connected to the air passage of the base 702. The gas in the pressure bladder 703 can enter the solenoid valve through the third medium flow channel 73 in the base 702, and flow out of the solenoid valve through the connected second medium flow channel 72 and first medium flow channel 71.

[0249] In scenario 1, the coil 22 is energized during inflation to keep the gas path sealed, and de-energized at other times to keep the gas path open. This balances the pressure in the entire gas path with the external pressure, which can extend the service life of the sealing device.

[0250] Scenario 2: When the solenoid valve coil 22 is not energized, it is used to block the first medium flow channel 71. (Refer to...) Figure 6 or Figure 9 .

[0251] When the electronic blood pressure monitor is inflating, for example, when the user clicks the measurement button on the monitor's display or presses the measurement button on the monitor, the processor 402 controls the air pump 4011 to inflate the pressure bladder 703. Simultaneously, the control coil 22 remains de-energized. Under the force of the reset assembly 3, the valve core assembly 4 seals the first opening 711 of the first medium flow channel 71, keeping the air passage of the solenoid valve and the air passage of the base 702 sealed. At this time, the gas in the pressure bladder 703 cannot be discharged through the solenoid valve.

[0252] When the electronic blood pressure monitor is deflating, for example, when the processor 402 detects that the measurement is complete or has obtained the measurement result, the processor 402 can control the coil 22 to be energized, so that the yoke 21 is magnetized and overcomes the force of the reset component 3 to attract the valve core assembly 4 to move towards the coil 22. When the valve core assembly 4 reaches a stable state, the valve core assembly 4 does not block the first opening 711 of the first medium flow channel 71, that is, the first opening 711 is in the open state, the air passage of the solenoid valve is connected to the air passage of the base 702, and the gas in the pressure bladder 703 can enter the solenoid valve through the third medium flow channel 73 in the base 702, and flow out of the solenoid valve through the connected second medium flow channel 72 and the first medium flow channel 71.

[0253] When measuring blood pressure, the inflation time is generally longer than the deflation time. In case 2, coil 22 is energized only during deflation. The inflation process does not need to be kept energized to ensure the air passage is sealed, thus reducing energy consumption.

[0254] It is understandable that in cases 1 and 2, when the pressure bladder 703 is deflated, the processor 402 can also control the air pump 4011 to deflate the pressure bladder 703.

[0255] It should be noted that, as mentioned in the above embodiments, the first medium flow channel 71 includes a first opening 711 and a second opening 712, the second medium flow channel 72 includes a third opening 721 and a fourth opening 722, and the third medium flow channel 73 includes a fifth opening 731 and a sixth opening 732. Taking the working medium flowing from the third medium flow channel 73 through the second medium flow channel 72 and then out of the first medium flow channel 71 as an example, here:

[0256] With respect to the third medium flow channel 73, the sixth opening 732 and the fifth opening 731 are the inlet and outlet of the third medium flow channel 73, respectively;

[0257] With respect to the second medium flow channel 72, the fourth opening 722 and the third opening 721 are the inlet and outlet of the second medium flow channel 72, respectively;

[0258] With respect to the first medium flow channel 71, the first opening 711 and the second opening 712 are the inlet and outlet of the first medium flow channel 71, respectively;

[0259] For the entire solenoid valve, the second medium flow channel 72 and the first medium flow channel 71 are the inlet flow channel and the outlet flow channel of the solenoid valve, respectively. Correspondingly, the fourth opening 722 and the third opening 721 are the flow channel inlets of the solenoid valve, and the first opening 711 and the second opening 712 are the flow channel outlets of the solenoid valve.

[0260] In addition, the coil 22 involved in the embodiments of this application should be interpreted in a broad sense. It can be a winding element, that is, the basic unit that constitutes a winding, mainly made of one or more turns of insulated wire wound in a certain shape; it can also be a coil group, that is, multiple winding elements connected together; or it can be a winding, that is, multiple winding elements or coil groups connected together in a certain pattern.

[0261] This application also provides a wearable device, which may include the solenoid valve (such as solenoid valve 500 or solenoid valve 600) or the pressure relief assembly 700 involved in the foregoing embodiments.

[0262] In some embodiments, the wearable device may further include a strap for securing the pressure bag 703 to a part of the user's body. Exemplarily, the user's body part includes any one of the wrist, arm, or ankle.

[0263] In some embodiments, the pressure bladder 703 is encapsulated in a strap.

[0264] In some embodiments, the wearable device may also include a pump for inflating the pressure bladder 703. Exemplarily, the pump may be an air pump or a liquid pump.

[0265] In some embodiments, the wearable device may also include a pressure sensor for detecting pressure in the pressure bladder 703.

[0266] In some embodiments, the wearable device can be used to measure a user's blood pressure, such as an electronic blood pressure monitor, or more specifically, a blood pressure watch.

[0267] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included 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. An electromagnetic valve characterized by comprising: include: The housing is an integral structure, and the housing is provided with a first groove and a first medium flow channel, wherein an opening of the first medium flow channel is formed in the bottom wall or side wall of the first groove. An electromagnetic component includes a yoke and a coil. The yoke is an integral structure. The yoke has a second medium flow channel spaced apart from each other and a first receiving space with an opening facing the bottom wall of the first groove. The coil is received in the first receiving space. The electromagnetic component is fastened to the housing to form a receiving cavity. The yoke includes a first body and a protrusion protruding from the surface of the first body. The protrusion is received in the first groove. The first body is connected to the housing. An opening of the second medium flow channel is formed on the surface of the protrusion facing the bottom wall of the first groove. A valve core assembly is housed in the receiving cavity, and the valve core assembly is disposed between the electromagnetic assembly and the housing; A reset assembly is housed in the receiving cavity, the reset assembly being disposed on the side of the valve core assembly facing the electromagnetic assembly and / or on the side of the valve core assembly away from the electromagnetic assembly; The electromagnetic component is used to drive the valve core assembly to move when the coil is energized, and the reset component is used to drive the valve core assembly to move when the coil is de-energized, so as to connect or disconnect the first medium flow channel from the second medium flow channel.

2. The electromagnetic valve according to claim 1, characterized by The housing includes a second body and an extension extending from the periphery of the second body toward the yoke, the second body and the extension forming the first groove, and the first body being connected to the end face of the extension.

3. The solenoid valve according to claim 1, characterized in that, The first medium flow channel is connected to the first groove; The second medium flow channel is connected to the first groove.

4. The solenoid valve according to any one of claims 1 to 3, characterized in that, Another opening of the first medium flow channel is provided on the outer wall of the housing; and / or Another opening of the second medium flow channel is located on the surface of the first body away from the bottom wall of the first groove.

5. The electromagnetic valve according to any one of claims 1 to 3, characterized by The protrusion includes a first protrusion and a second protrusion, the second protrusion being disposed around the first protrusion, and the first receiving space being formed between the first protrusion and the second protrusion.

6. The electromagnetic valve according to claim 5, characterized by A plurality of first receiving spaces are formed between the first protrusion and the second protrusion, and the electromagnetic component includes a plurality of coils, wherein the plurality of first receiving spaces and the plurality of coils correspond one-to-one.

7. The electromagnetic valve according to claim 5, wherein The first accommodating space is annular.

8. The electromagnetic valve according to claim 5, characterized by The opening of the second medium flow channel is located on the surface of the first protrusion facing the bottom wall of the first groove.

9. The electromagnetic valve according to any one of claims 1 to 3, characterized by The reset assembly includes an elastic element, which is sleeved on the protrusion. One end of the elastic element abuts against the valve core assembly, and the other end of the elastic element abuts against the first body.

10. The electromagnetic valve according to claim 9, characterized by The protrusion includes a first protrusion and a second protrusion, the second protrusion being arranged around the first protrusion, and the elastic element being sleeved on the second protrusion.

11. The electromagnetic valve according to claim 9, characterized by The other end of the elastic element abuts against the plane of the first body facing the valve core assembly.

12. The solenoid valve according to claim 9, wherein A step is provided between the first body and the protrusion, and the other end of the elastic member abuts against the step surface.

13. The solenoid valve according to claim 9, wherein The elastic element is any one of a spring, a bellows, and an elastic block.

14. The solenoid valve according to claim 9, characterized in that, When the coil is energized, the magnetic yoke attracts the valve core assembly, and the elastic element is in a compressed state. Under the magnetic force of the magnetic yoke and the elastic force of the elastic element, the valve core assembly abuts against the protrusion.

15. The electromagnetic valve according to any one of claims 1 to 3, characterized by The reset assembly includes a magnetic element housed in a second accommodating space provided on the housing. The second accommodating space is close to the bottom wall of the first groove and corresponds to the position of the valve core assembly. The magnetic element and the coil are respectively disposed on both sides of the valve core assembly, and there is a magnetic attraction between the magnetic element and the valve core assembly.

16. The solenoid valve according to claim 15, wherein The magnetic component is embedded in the housing using an insert injection molding process.

17. The solenoid valve according to claim 15, characterized in that, When the coil is energized, the magnetic yoke attracts the valve core assembly, and under the magnetic force of the magnetic yoke and the magnetic force of the magnetic component, the valve core assembly abuts against the protrusion.

18. The solenoid valve according to any one of claims 1 to 3, characterized in that, When the coil is energized, the valve core assembly blocks the second medium flow channel; when the coil is not energized, the first medium flow channel and the second medium flow channel are connected through the first groove; or When the coil is not energized, the valve core assembly blocks the first medium flow channel; when the coil is energized, the first medium flow channel and the second medium flow channel are connected through the first groove.

19. The electromagnetic valve according to any one of claims 1 to 3, characterized by The valve core assembly includes a seal and a partition. The partition is used to drive the seal to move under the drive of the electromagnetic assembly or the reset assembly, so as to block the first medium flow channel or the second medium flow channel.

20. The solenoid valve according to claim 19, characterized in that, The end of the seal near the first medium flow channel protrudes relative to the partition towards the first medium flow channel, and / or The end of the seal near the second medium flow channel protrudes toward the second medium flow channel relative to the partition.

21. The solenoid valve according to claim 20, characterized in that, The protrusion is provided with a second groove on the side facing the bottom wall of the first groove, which communicates with the second medium flow channel. The second groove is used to accommodate the portion of the seal protruding toward the second medium flow channel relative to the partition. and / or The bottom wall of the first groove is provided with a third groove that communicates with the first medium flow channel. The third groove is used to accommodate the portion of the seal protruding toward the first medium flow channel relative to the partition.

22. The solenoid valve according to claim 20, characterized in that, When the seal is used to block the first medium flow channel, when the valve core assembly abuts against the protrusion, the portion of the seal protruding towards the second medium flow channel relative to the partition is at least partially received within the second medium flow channel, and a gap exists between the inner wall of the second medium flow channel and the seal; or When the seal is used to block the second medium flow channel, when the valve core assembly abuts against the bottom wall of the first groove, the portion of the seal protruding toward the first medium flow channel relative to the partition is at least partially received in the first medium flow channel, and there is a gap between the inner wall of the first medium flow channel and the seal.

23. The solenoid valve according to claim 19, wherein The partition includes permanent magnet material or soft magnetic material.

24. The solenoid valve according to claim 19, wherein The partition is provided with at least one through hole, which is used to connect the first medium flow channel and the second medium flow channel.

25. The solenoid valve according to claim 24, characterized in that, The bottom wall of the first groove or the surface of the partition facing the bottom wall of the first groove has a protrusion. The partition abuts against the bottom wall of the first groove through the protrusion. The protrusion is misaligned with the through hole. A gap is formed in the area between the bottom wall of the first groove and the partition where the protrusion is not provided.

26. The electromagnetic valve according to any one of claims 1 to 3, characterized by The first accommodating space is arranged around the second medium flow channel.

27. The electromagnetic valve according to any one of claims 1 to 3, characterized by The solenoid valve further includes a dustproof component, which is disposed on the first medium flow channel and / or the second medium flow channel of the solenoid valve.

28. The solenoid valve according to claim 27, wherein The housing is also provided with a fourth groove, the opening of which is opposite to the opening of the first groove. Another opening of the first medium flow channel is formed on the bottom wall of the fourth groove. The dustproof component is received in the fourth groove and covers the other opening.

29. The electromagnetic valve according to any one of claims 1 to 3, characterized by The solenoid valve also includes an electrical connector, which is disposed on the outer wall of the housing and is electrically connected to the coil through a wiring hole provided on the magnetic yoke.

30. The electromagnetic valve according to any one of claims 1 to 3, characterized by The housing is sealed to the magnetic yoke.

31. The electromagnetic valve according to any one of claims 1 to 3, characterized by The solenoid valve further includes a base body connected to the housing or the magnetic yoke, wherein a third medium flow channel is provided on the base body, and the third medium flow channel is connected to the non-outlet flow channel of the first medium flow channel and the second medium flow channel.

32. The electromagnetic valve according to any one of claims 1 to 3, characterized by The working medium of the solenoid valve is gas or liquid.

33. A wearable device, comprising: include: An airbag and a solenoid valve as described in any one of claims 1 to 32, wherein the airbag is connected to the solenoid valve; wherein... When the airbag is inflated, the first medium flow channel of the solenoid valve is isolated from the second medium flow channel; When the airbag deflates, the first medium flow channel of the solenoid valve is connected to the second medium flow channel.

34. The wearable device of claim 33, wherein, The wearable device also includes straps for securing the airbag to a part of the user's body.

35. The wearable device of claim 34, wherein, The airbag is encapsulated in the strap.

36. The wearable device of claim 34 or 35, wherein, The user's body parts include any one of the wrist, arm, or ankle.

37. The wearable device of any one of claims 33-35, wherein, The wearable device also includes an air pump for inflating the airbag.

38. The wearable device of any one of claims 33-35, wherein, The wearable device also includes a pressure sensor for detecting pressure in the airbag.

39. The wearable device of any one of claims 33-35, wherein, The wearable device also includes a base, on which a third medium channel is provided, and the first end of the third medium channel is connected to the second medium channel.

40. The wearable device of claim 39, wherein, The substrate is connected to the magnetic yoke.

41. The wearable device of claim 39, wherein, The airbag is connected to the solenoid valve through the base, and the second end of the third medium flow channel is connected to the airbag.

42. The wearable device of claim 39, wherein, The magnetic yoke is made of a metallic material.

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