Solenoid valves and wearable devices

Abstract

The embodiment of the present application provides a solenoid valve and a wearable device. The solenoid valve includes a housing, an electromagnetic assembly, a valve core assembly, and a reset assembly; the electromagnetic assembly includes a magnetic yoke and a coil, and the magnetic yoke is provided with a second medium flow channel and a first accommodating space for accommodating the coil; the electromagnetic assembly and the housing are snapped together to form an accommodating chamber for accommodating the valve core assembly and the reset assembly; the valve core assembly is arranged between the electromagnetic assembly and the housing; the reset assembly is arranged on the side of the valve core assembly facing the electromagnetic assembly and / or the side away from the electromagnetic assembly. The housing and the magnetic yoke are respectively provided with a first medium flow channel and a second medium flow channel, and the electromagnetic assembly and the reset assembly are respectively used to drive the valve core assembly to move when the coil is energized and when the coil is de-energized, so as to connect or disconnect the first medium flow channel with the second medium flow channel. The above technical solution can reduce the volume of the solenoid valve, thereby adapting to the space requirements of electronic equipment, realizing the miniaturization of electronic equipment, and also improving the sealing performance of the solenoid valve.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electronic equipment, and more specifically, to a solenoid valve and a wearable device. Background Art

[0002] Blood pressure is a key physiological indicator for human health monitoring and can reflect a person's health status. An electronic blood pressure monitor is a medical device that uses electronic technology and the principle of indirect blood pressure measurement to measure blood pressure. The miniaturization of electronic blood pressure monitors increases their portability, making them suitable for home use and meeting daily blood pressure measurement needs.

[0003] With the continuous improvement of living standards, people pay more and more attention to their own health and require the ability to dynamically measure blood pressure anytime and anywhere. Therefore, miniaturization and wearability have become the development trend of electronic blood pressure monitors.

[0004] Electronic blood pressure monitors typically measure blood pressure through the inflation and deflation of an airbag. The solenoid valve is a key component in electronic blood pressure monitors, controlling the flow of air. To meet sealing requirements, existing electronic blood pressure monitors often require a relatively large solenoid valve, making it difficult to accommodate the space constraints of increasingly miniaturized and wearable electronic blood pressure monitors. Summary of the Invention

[0005] The embodiments of the present application provide a solenoid valve and a wearable device, which can simplify the structure of the solenoid valve and achieve miniaturization of the solenoid valve.

[0006] In the first aspect, a solenoid valve is provided, comprising: a shell, a first medium flow channel is provided on the shell; an electromagnetic assembly, comprising a yoke and a coil, a second medium flow channel and a first accommodating space are provided on the yoke, the coil is accommodated in the first accommodating space, and the electromagnetic assembly and the shell are snapped together to form an accommodating chamber; a valve core assembly is accommodated in the accommodating chamber, and the valve core assembly is arranged between the electromagnetic assembly and the shell; a reset assembly is accommodated in the accommodating chamber, and the reset assembly is arranged 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 isolate the first medium flow channel and the second medium flow channel.

[0007] In the embodiments of this application, the yoke effectively serves as part of the solenoid valve's housing. The electromagnetic assembly, including the yoke, snaps into place with the housing to create a space for other components. This streamlines the solenoid valve's design, reducing its overall size and thus meeting the space requirements of electronic devices, enabling miniaturization. Furthermore, the media flow path is located within the housing and yoke, creating an integral seal that enhances the valve's airtightness, and consequently, improves its corrosion resistance and reliability.

[0008] In combination with the first aspect, in one possible implementation, a first groove is provided on the side of the shell facing the yoke; the yoke includes a first main body and a protrusion protruding from the surface of the first main body, the first main body is connected to the shell, the first accommodating space is provided on the protrusion, and the protrusion is accommodated in the first groove.

[0009] The solenoid valve provided in the embodiment of the present application has a simple structure and streamlined components, making the manufacturing process simpler and more reliable, improving the dimensional accuracy of components within the solenoid valve, reducing the difficulty of assembling the solenoid valve, and improving the yield rate.

[0010] Furthermore, the first coil-accommodating space provided on the magnetic yoke allows the coil to be enclosed by a single component, eliminating the need for the yoke to form a mounting slot for the coil. This not only facilitates coil installation and reduces the difficulty of solenoid valve assembly, but also effectively saves space, facilitates miniaturization, and enhances the overall seal of the solenoid valve. Furthermore, the magnetic yoke transmits the magnetic lines of force generated by the energized coil to the desired location, thereby forming a magnetic field in the desired location and reducing magnetic leakage.

[0011] In combination with the first aspect, in a possible implementation, the first medium flow channel is communicated with the first groove; and the second medium flow channel is communicated with the first groove.

[0012] The first medium flow channel and the second medium flow channel are respectively arranged on the shell 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 shell and the electromagnetic component. Since the accommodating cavity is formed by the connection between the shell and the electromagnetic component, there are fewer sealing interfaces, which improves the sealing reliability, and thus the sealing performance of the entire passage is better.

[0013] In combination with the first aspect, in one possible implementation, the first medium flow channel includes a first opening and a second opening, the first opening is arranged on the bottom wall or side wall of the first groove, and the second opening is arranged on the outer wall of the shell; and / or the second medium flow channel includes a third opening and a fourth opening, the third opening is arranged on the surface of the protrusion toward the bottom wall of the first groove, and the fourth opening is arranged on the surface of the first body away from the bottom wall of the first groove.

[0014] The complete first medium flow channel is formed by a single component, namely the housing, which can improve the sealing performance of the pipeline in the solenoid valve and simplify the assembly difficulty.

[0015] The complete second medium flow channel is formed by a single component, the magnetic yoke, which can improve the sealing performance of the pipeline in the solenoid valve and simplify the assembly difficulty.

[0016] In combination with the first aspect, in a possible implementation, a center line of the first medium flow channel is a straight line; and / or a center line of the second medium flow channel is a straight line.

[0017] In this way, the first medium flow channel or the second medium flow channel has less resistance to the working medium (such as gas or liquid) of the solenoid valve, allowing the working medium to pass smoothly through the first medium flow channel and the second medium flow channel, thereby improving the response speed and pressure relief efficiency of the solenoid valve and reducing the pressure relief time.

[0018] In combination with the first aspect, in a possible implementation, a center line of the first medium flow channel coincides with a center line of the second medium flow channel.

[0019] In this way, when the pressure is released, the working medium of the solenoid valve can smoothly reach the outlet from the inlet of the solenoid valve, with a short flow distance and small resistance, which improves the response speed and pressure relief efficiency of the solenoid valve and reduces the pressure relief time.

[0020] In combination with the first aspect, in a possible implementation, the first accommodating space is provided around the second medium flow channel.

[0021] In this way, it is convenient to design the space for accommodating the coil (ie, the first accommodating space) and the second medium flow channel on the magnetic yoke.

[0022] In combination with the first aspect, in a possible implementation, the protrusion includes a first protrusion and a second protrusion, the second protrusion is arranged around the first protrusion, and a first accommodating space is formed between the first protrusion and the second protrusion.

[0023] In this way, the yoke is easy to process and the coil is easy to install. In addition, when a single coil is arranged in the first accommodation space, the circuit connection and wiring layout can be simplified.

[0024] In combination with the first aspect, in a possible implementation, the opening of the second medium flow channel close to the valve core assembly is provided on a surface of the first protrusion facing the bottom wall of the first groove.

[0025] In this way, the opening of the second medium flow channel close to the valve core assembly is basically in the middle position, the force applied to the valve core assembly is more uniform, and the sealing effect of the valve core assembly can be improved.

[0026] In combination with the first aspect, in a possible implementation, the reset assembly includes an elastic member, which is sleeved on the protrusion, one end of the elastic member abuts against the valve core assembly, and the other end of the elastic member abuts against the first body.

[0027] The elastic member has good elastic deformation capability, is simple to process, convenient to arrange, and can provide good reliability.

[0028] In combination with the first aspect, in a possible implementation, the elastic member is any one of a spring, a bellows, and an elastic block.

[0029] In combination with the first aspect, in one possible implementation, when the coil is energized, the magnetic yoke attracts the valve core assembly, and the elastic member is in a compressed state. Under the action of the magnetic force of the magnetic yoke and the elastic force of the elastic member, the valve core assembly rests against the protrusion.

[0030] In combination with the first aspect, in a possible implementation, the reset assembly includes a magnetic component, which is accommodated in a second accommodating space set on the shell. 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 component and the coil are respectively arranged on both sides of the valve core assembly, and there is a magnetic attraction force between the magnetic component and the valve core assembly.

[0031] The valve core assembly moves under the magnetic force of the magnetic part, which can make the force on the valve core assembly more uniform, the movement more stable, and avoid tilting and jamming.

[0032] In combination with the first aspect, in a possible implementation manner, the magnetic component is embedded in the housing through an insert injection molding process.

[0033] The integrated product manufactured in this way avoids adding a new sealing interface and is beneficial to improving the sealing performance of the solenoid valve without affecting the performance of the magnetic component.

[0034] In combination with the first aspect, in a possible implementation, the magnetic component is a permanent magnet or a soft magnet.

[0035] In combination with the first aspect, in a possible implementation, 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 member, the valve core assembly rests against the protrusion.

[0036] In combination with the first aspect, in one possible implementation, when the coil is energized, the valve core assembly blocks the second medium flow channel, and 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, and when the coil is energized, the first medium flow channel and the second medium flow channel are connected through the first groove.

[0037] In combination with the first aspect, in a possible implementation, the valve core assembly includes a seal and a partition, and the partition is used to drive the seal to move under the drive of the electromagnetic assembly or the reset assembly to block the first medium flow channel or the second medium flow channel.

[0038] In combination with the first aspect, in a possible implementation, one end of the seal close to the first medium flow channel protrudes toward the first medium flow channel relative to the partition, and / or one end of the seal close to the second medium flow channel protrudes toward the second medium flow channel relative to the partition.

[0039] The protruding portion of the seal can ensure sufficient deformation to form a good seal at the blockage.

[0040] In combination with the first aspect, in one possible implementation, a second groove connected to the second medium flow channel is provided on the side of the bottom wall of the protrusion facing the first groove, and 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 connected to the first medium flow channel, and the third groove is used to accommodate the portion of the seal protruding toward the first medium flow channel relative to the partition.

[0041] In this way, the thickness of the solenoid valve in the direction of engagement between the housing and the solenoid assembly can be reduced while satisfying the sealing performance of the seal, which is conducive to miniaturization of the solenoid valve.

[0042] In combination with the first aspect, in one possible implementation, the seal is used to block the first medium flow channel, and when the coil is energized, the portion of the seal protruding toward the second medium flow channel relative to the partition is accommodated 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, and when the coil is not energized, the portion of the seal protruding toward the first medium flow channel relative to the partition is accommodated in the first medium flow channel, and there is a gap between the inner wall of the first medium flow channel and the seal.

[0043] In this way, the thickness of the solenoid valve in the direction where the housing and the yoke engage can be reduced while ensuring that the first medium flow channel and the second medium flow channel can be communicated, which is conducive to miniaturization of the solenoid valve.

[0044] In combination with the first aspect, in a possible implementation, the partition includes a permanent magnetic material or a soft magnetic material.

[0045] In combination with the first aspect, in a possible implementation, the partition is provided with at least one through hole, and the through hole is used to connect the first medium flow channel and the second medium flow channel.

[0046] In combination with the first aspect, in one possible implementation, a protrusion is provided on the bottom wall of the first groove or on the surface of the partition facing the bottom wall of the first groove, and the partition and the bottom wall of the first groove are abutted against each other through the protrusion, wherein the protrusion and the through hole are staggered, and a gap is formed in the area between the bottom wall of the first groove and the partition where the protrusion is not provided.

[0047] The gap formed between the partition and the bottom wall of the first groove due to the provision of the protrusion 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.

[0048] In combination with the first aspect, in a possible implementation, the solenoid valve further includes a dustproof component, and the dustproof component is disposed in the first medium flow channel and / or the second medium flow channel of the solenoid valve.

[0049] Here, one of the first medium flow channel and the second medium flow channel is the inlet flow channel of the solenoid valve, and the other is the outlet flow channel of the solenoid valve. In other words, the dustproof assembly can be installed at the inlet flow channel and / or the outlet flow channel of the solenoid valve. The dustproof assembly can prevent dust and other foreign objects from entering the solenoid valve, thereby preventing it from affecting its normal function.

[0050] In combination with the first aspect, in a possible implementation, the solenoid valve further includes an electrical connector, which is disposed on an outer wall of the shell and is electrically connected to the coil through a wiring hole provided on the magnetic yoke.

[0051] In conjunction with the first aspect, in a possible implementation, the housing is an integrated structure, and / or the yoke is an integrated structure. The integrated housing and / or yoke can make the manufacturing process simpler.

[0052] In combination with the first aspect, in a possible implementation, the housing is sealed to the magnetic yoke, which is conducive to achieving overall sealing of the solenoid valve.

[0053] In combination with the first aspect, in a possible implementation, the solenoid valve also includes a base, which is connected to the shell or the magnetic yoke, wherein a third medium flow channel is provided on the base, and the third medium flow channel is connected to the non-outlet flow channel in the first medium flow channel and the second medium flow channel.

[0054] The single component, the base, forms a complete third medium flow channel, improving the pipeline's sealing and simplifying assembly. Furthermore, the first, second, and third medium flow channels are all internally located within the component, allowing their orientation to be tailored to actual needs. This eliminates the need for piping through a sleeve at the solenoid valve, resulting in a more regular shape and reduced overall size, making it suitable for the space-constrained requirements of electronic devices such as wearables.

[0055] In combination with the first aspect, in a possible implementation, the working medium of the solenoid valve is gas or liquid.

[0056] In a second aspect, a pressure charging and discharging assembly is provided, comprising the solenoid valve according to the first aspect or any possible implementation of the first aspect.

[0057] In a third aspect, a wearable device is provided, comprising: an airbag and the solenoid valve of the aforementioned first aspect or any possible implementation of the first aspect, the airbag being connected to the solenoid valve; wherein, when the airbag is inflated, the first medium flow channel of the solenoid valve is separated from the second medium flow channel; when the airbag is deflated, the first medium flow channel of the solenoid valve is connected to the second medium flow channel.

[0058] The solenoid valve provided in the embodiment of the present application has good air tightness and, when applied to wearable devices, can improve the accuracy of parameters measured using an airbag.

[0059] In conjunction with the third aspect, in a possible implementation, the wearable device further includes a strap, and the strap is used to strap the airbag to a body part of the user.

[0060] In conjunction with the third aspect, in a possible implementation, the airbag is encapsulated in a strap.

[0061] In conjunction with the third aspect, in a possible implementation, the user's body part includes any one of a wrist, an arm, and an ankle.

[0062] In combination with the third aspect, in a possible implementation, the wearable device further includes an air pump, which is used to inflate the airbag.

[0063] In conjunction with the third aspect, in a possible implementation, the wearable device further includes a pressure sensor, which is used to detect the pressure in the airbag.

[0064] In conjunction with the third aspect, in one possible implementation, the wearable device is an electronic blood pressure monitor. Exemplarily, the wearable device is a blood pressure watch or a blood pressure bracelet.

[0065] When the solenoid valve provided in the embodiment of the present application is applied to an electronic blood pressure meter, it is conducive to miniaturization of the electronic blood pressure meter and can also improve the accuracy of blood pressure measurement.

[0066] The beneficial effects of the devices involved in the second to third aspects above can be referred to the relevant description of the first aspect, and for the sake of brevity, they will not be repeated. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 It is a schematic diagram of a scenario to which the embodiments of the present application are applicable.

[0068] Figure 2This is a schematic structural diagram of an electronic device provided in an embodiment of the present application.

[0069] Figure 3 This is a schematic diagram of the assembly of a solenoid valve provided in an embodiment of the present application.

[0070] Figure 4 This is a schematic diagram of an exploded view of a solenoid valve provided in an embodiment of the present application.

[0071] Figure 5 It is a cross-sectional schematic diagram of a solenoid valve provided in an embodiment of the present application.

[0072] Figure 6 It is a cross-sectional schematic diagram of another solenoid valve provided in an embodiment of the present application.

[0073] Figure 7 This is a schematic diagram of an exploded view of a solenoid valve provided in an embodiment of the present application.

[0074] Figure 8 It is a cross-sectional schematic diagram of a solenoid valve provided in an embodiment of the present application.

[0075] Figure 9 It is a cross-sectional schematic diagram of another solenoid valve provided in an embodiment of the present application.

[0076] Figure 10 This is a schematic diagram of the assembly of a pressure charging and releasing component provided in an embodiment of the present application.

[0077] Figure 11 This is a schematic diagram of an exploded view of a pressure charging and releasing component provided in an embodiment of the present application.

[0078] Figure 12 It is a cross-sectional schematic diagram of a pressure charging and releasing assembly provided in an embodiment of the present application. DETAILED DESCRIPTION

[0079] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings.

[0080] It should be noted that, in the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; “and / or” in this article is merely a way to describe the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone.

[0081] In the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two, and "at least one" and "one or more" refer to one, two or more. The singular expressions "a", "a", "said", "above", "the" and "this" are intended to also include expressions such as "one or more", unless there is a clear indication to the contrary in the context.

[0082] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in 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 "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0083] In the description of the embodiments of the present application, the terms "up", "down", "left", "right", "inside", "outside", "vertical", "horizontal", etc. indicate orientations or positional relationships that are defined relative to the orientations or positions of the components schematically placed in the accompanying drawings. It should be understood that these directional terms are relative concepts. They are used for relative descriptions and clarifications, rather than indicating or implying that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They may change accordingly according to changes in the orientation of the components placed in the accompanying drawings, and therefore cannot be understood as limitations on the present application. In addition, the "vertical" involved in the present application is not vertical in the strict sense, but is within the allowable error range. The "parallel" is not parallel in the strict sense, but is within the allowable error range.

[0084] In the embodiments of this application, the same reference numerals are used to represent the same components or parts. For identical parts in the embodiments of this application, only one of the parts or parts may be labeled with a reference numeral in the figures as an example. It should be understood that the same reference numerals apply to the other identical parts or parts. In addition, the drawings are not drawn to scale, and the sizes and dimensions of the various parts shown in the drawings are only illustrative and should not be construed as limiting the present application.

[0085] For ease of understanding, the technical terms involved in this application are explained and illustrated below.

[0086] A magnetic yoke typically refers to a soft magnetic material that does not generate its own magnetic field (magnetic lines of force) and only serves to transmit magnetic lines of force within a magnetic circuit. Magnetic yokes are commonly made of soft iron with relatively high magnetic permeability, A3 steel (i.e., Q235 carbon structural steel), and soft magnetic alloys. In some special applications, ferrite materials can also be used. Magnetic yokes can have several functions: limiting the spread of magnetic flux leakage from the induction coil, improving the efficiency of induction heating, and supporting and securing the induction coil.

[0087] The magnetic effect of electric current refers to the phenomenon that any wire carrying current can generate a magnetic field around it. For example, a coil of wire generates a magnetic field because the current makes the coil magnetic.

[0088] An elastic part refers to 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.

[0089] Permanent magnets are magnets that can maintain their magnetism for a long time. They are hard magnets that are not easily demagnetized or magnetized.

[0090] Permanent magnetic materials refer to materials that are difficult to magnetize and difficult to demagnetize once magnetized. Their main characteristic is high coercive force (usually greater than 1000 amperes per meter (A / m)).

[0091] Soft magnets are magnets that are easily magnetized, but their magnetism disappears easily after magnetization, and their magnetism cannot be maintained for a long time.

[0092] Soft magnetic materials refer to magnetic materials with low coercive force (less than 1000A / m, usually less than 100A / m) and high magnetic permeability. Their main characteristics are that they are easy to magnetize and demagnetize, and can achieve maximum magnetization intensity with a minimum external magnetic field.

[0093] Coercive force refers to the magnetic field strength required to reduce the residual magnetism (residual magnetic flux density or residual magnetization) of a magnetic material to zero after magnetization and subsequent demagnetization. Coercive force, also known as coercive magnetic field, is represented by the symbol Hc. Generally, the remanence of soft magnets is small or very small, while the remanence of permanent magnets is large. Therefore, the coercive force of permanent magnets is greater than that of soft magnets.

[0094] With the continuous improvement of living standards, people are paying more and more attention to their own health. As a major physiological indicator of the human body, blood pressure is also increasingly valued by people. An electronic blood pressure monitor is a medical device that uses electronic technology and the principle of indirect blood pressure measurement to measure blood pressure. The miniaturization of electronic blood pressure monitors increases the portability of the product, making the electronic blood pressure monitor suitable for home use and meeting the family's daily blood pressure measurement needs. At present, the electronic blood pressure monitor product forms on the market mainly 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 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 Schematic diagrams of the above electronic blood pressure monitors are shown.

[0095] Figure 1 (a) in FIG. 1 shows a schematic diagram of a use scenario of an arm-type blood pressure monitor. Figure 1 As shown in (a) of FIG, an arm blood pressure monitor 100 includes 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 is enclosed with an air bag, and the air tube 103 connects the air pump in the main unit 101 and the air bag in the cuff 102. During use, the cuff 102 can be wrapped around and tied to the human arm. The main unit 101 can control the air pump to inflate the air bag, causing it to expand and compress the blood vessels, and can also control the air bag to deflate, thereby achieving blood pressure measurement.

[0096] Figure 1 (b) in FIG shows a schematic diagram of a use scenario of a wrist blood pressure monitor. Figure 1 As shown in (b) of FIG, a wrist blood pressure monitor 200 includes a main unit 201 and a wristband 202. The main unit 201 is equipped with an air pump, and the wristband 202 encloses an air bag, with the air pump and air bag in communication. During use, the wristband 202 can be wrapped around and tied to a person's wrist, with the main unit 201 positioned on the palm of the hand. The main unit 201 controls the air pump to inflate the air bag, causing it to expand and compress the blood vessels, and can also control the air bag to deflate, thereby measuring blood pressure.

[0097] Figure 1 (c) in FIG. 1 shows a schematic diagram of a usage scenario of a watch-type blood pressure monitor. Figure 1As shown in (c) in the figure, the watch-type blood pressure monitor 300 may include a main unit 301 and a strap 302. The main unit 301 is provided with an air pump, and the strap 302 is encapsulated with an air bag, and the air pump is connected to the air bag. When in use, the strap 302 can be wrapped around and tied to the human wrist, and the main unit 301 is located on the back of the hand. The main unit 301 can control the air pump to inflate the air bag, causing the air bag to expand and compress the blood vessels, and can control the air bag to deflate, thereby achieving blood pressure measurement. Of course, in other embodiments, in addition to the watch-type blood pressure monitor, the electronic blood pressure monitor involved in this application may also be other wearable blood pressure monitors, such as a portable blood pressure monitor suitable for long-term wear, such as a blood pressure bracelet.

[0098] Most electronic blood pressure monitors use the oscillometric method to measure blood pressure indirectly. 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 tied, the host 101 can control the air pump to inflate the airbag, causing the airbag to expand and compress the blood vessels; when the airbag expands to a certain extent, it will compress and close the blood vessels, blocking blood flow; when the blood flow is completely blocked, the host 101 controls the airbag to deflate, and the blood vessels will generate a vibration waveform at this time. This vibration waveform can cause the gas in the airbag to oscillate, and the oscillation waveform of the gas is related to the vibration waveform of the blood vessels; the host 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 principles of the wrist-type blood pressure monitor 200 and the watch-type blood pressure monitor 300 are the same as above, and for the sake of simplicity, they will not be repeated.

[0099] It can be understood that the types and measurement principles of the electronic blood pressure monitors introduced above are merely exemplary. In other embodiments, the electronic blood pressure monitors may have other product forms (such as blood pressure bracelets) and may also adopt other measurement principles (such as the Korotkoff sound method), which will not be described in detail here.

[0100] The technical solution provided in the embodiments of the present application can be applied to electronic devices with charging and releasing 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 the user's clothes or accessories, has computing functions, and can also be connected to a mobile phone or other terminal device. For example, the wearable device can be a smart watch (such as Figure 1 (c) in the figure), smart bracelets, wrist blood pressure monitors (such as Figure 1 (b) in the figure), arm sphygmomanometer (as shown in Figure 1 (as shown in (a) in the figure), etc. This application does not specifically limit the type of wearable devices.

[0101] Figure 2: shows a schematic structural diagram of an electronic device provided in an embodiment of the present application. For example, Figure 2 The 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 (such as the arm blood pressure monitor 100, or the wrist blood pressure monitor 200, or the watch blood pressure monitor 300) shown in FIG, that is, the electronic device 410 or the electronic device 420 can have a blood pressure detection function.

[0102] like Figure 2 (a) or Figure 2 As shown in (b), the electronic device 410 or the electronic device 420 may include a detection component 401, a processor 402, a display component 403, a power supply component 404, a memory 405, and an input / output interface 406. In some embodiments, the electronic device 410 or the electronic device 420 may also include a wireless communication component 407.

[0103] It should be noted that Figure 2 The electronic device 410 shown in (a) is Figure 2 The main difference between the electronic device 420 shown in (b) is that the detection component 401 is slightly different, which will be described in detail below.

[0104] The detection component 401 is a core component for blood pressure detection. As an example, Figure 2 As shown in (a) in FIG, in the electronic device 410 , the detection component 401 may include an air pump 4011 , an air bag 4012 and a sensor 4013 .

[0105] The air pump 4011 is connected to the airbag 4012 and is used to inflate the airbag 4012 or deflate the airbag 4012 (i.e., to discharge the air in the airbag 4012). For example, when the air pump 4011 inflates the airbag 4012, the exhaust port provided in the air pump 4011 is in a closed state, and the pressure in the airbag 4012 continues to increase; when the gas in the airbag 4012 needs to be discharged, the exhaust port provided in the air pump 4011 is in an open state, and the gas is discharged through the exhaust port. In the embodiment of the present application, the air pump 4011 can be an electric air pump, a manual air pump, or a foot-operated air pump. Exemplarily, the air pump 4011 can be a micro air pump, such as a diaphragm micro air pump, an electromagnetic micro air pump, an impeller micro air pump, a piston micro air pump, etc. The present application does not limit the specific type of the air pump 4011.

[0106] The airbag 4012 is used to store the air filled by the air pump 4011 and can be attached to the user's part to be detected during use. For example, the electronic device 410 may further include a strap, in which the airbag 4012 is encapsulated. When the electronic device 410 is in use, the airbag 4012 can be surrounded by the strap and attached to the user's part to be detected. Exemplarily, the user's part to be detected can be the user's wrist, upper arm, ankle, or other body part. Accordingly, the strap can also have corresponding names, such as a cuff, wristband, watchband, ankle strap, etc., which are not limited in this embodiment of the present application.

[0107] Sensor 4013 is connected to airbag 4012 and is used to obtain sensor parameters to calculate 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. As an example and not a limitation, in an example of measuring blood pressure based on an oscillometric method, sensor 4013 may be a barometer, which can collect the oscillating waveform signal of the gas through the air path between the barometer and airbag 4012 and send it to processor 402.

[0108] In some embodiments, the sensor 4013 may be connected to the airbag 4012 via an air path, and the sensor 4013 may measure the air pressure of the airbag 4012 via the air path. In other embodiments, the sensor 4013 may be attached to the inner wall of the airbag 4012 to measure the air pressure of the airbag 4012.

[0109] In some embodiments, a solenoid valve 4014 may be provided on the air path between the air pump 4011 and the airbag 4012 to control the opening and closing of the air path between the air pump 4011 and the airbag 4012, thereby enabling inflation and / or deflation of the airbag 4012. For example, when the airbag 4012 needs to be inflated, the solenoid valve 4014 is in an open state, allowing gas to be delivered from the air pump 4011 to the airbag 4012; when the gas in the airbag 4012 needs to be discharged, the solenoid valve 4014 is in an open state, allowing gas to flow from the airbag 4012 to the air pump 4011. Furthermore, when the pressure in the airbag 4012 needs to be maintained, the solenoid valve 4014 may be in a closed state.

[0110] As another example, Figure 2As shown in (b) of FIG. 4 , in electronic device 420, detection component 401 may include an air pump 4011, an airbag 4012, a sensor 4013, and a solenoid valve 4015. Air pump 4011 and solenoid valve 4015 are respectively connected to the air path of airbag 4012 and serve as two air outlets of airbag 4012. The air path between air pump 4011 and airbag 4012 may be referred to as a first air path, and the air path between solenoid valve 4015 and airbag 4012 may be referred to as a second air path. In some embodiments, solenoid valve 4015 may also be referred to as a pressure relief valve.

[0111] Here, when both a first air path and a second air path are provided, the first air path can be used to inflate the airbag 4012 or to both inflate and deflate the airbag 4012, and the second air path can be used to deflate the airbag 4012. That is, the inflation of the airbag 4012 can be achieved through the air path connected to the air pump 4011, while the deflation of the airbag 4012 can be achieved through one or more air paths. For example, the airbag 4012 can be deflated through the first air path and the second air path, wherein the air inlet and the air outlet of the first air path are the airbag 4012 and the air pump 4011, respectively, and the air inlet and the air outlet of the second air path 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 air outlets. For example, when it is necessary to inflate the airbag 4012, the exhaust port of the air pump 4011 is closed, the solenoid valve 4015 is closed, and the air pump 4011 can inflate the airbag 4012. When it is necessary to discharge the air from the airbag 4012, the exhaust port of the air pump 4011 is opened, the solenoid valve 4015 is opened, and the air from the airbag 4012 is discharged through the air pump 4011 and the solenoid valve 4015. Alternatively, the exhaust ports of the air pump 4011 are both closed, the solenoid valve 4015 is opened, and the air from the airbag 4012 is discharged only through the solenoid valve 4015.

[0112] Understandably, Figure 2 In the electronic device 420 shown in (b), the first gas path may also be provided with a Figure 2 The working principle and process of the solenoid valve 4014 shown in (a) can be referred to the relevant description of the solenoid valve 4014 above, which will not be repeated for the sake of brevity.

[0113] Here, the first air path and the second air path can be independent of each other and have no overlapping paths, or the first air path and the second air path can partially overlap, and this application is not limited to this. In some embodiments, if the two air paths have the same air inlet and different air outlets, or if the two air paths have different air inlets and the same air outlets, the two air paths can be said to be parallel or connected.

[0114] In the embodiment of the present application, the airbag 4012 is pneumatically connected to the air pump 4011, and the airbag 4012 is pneumatically connected to the solenoid valve 4015. The airbag 4012 can also be pneumatically connected to the sensor 4013. In actual applications, the air pump 4011, the airbag 4012, the sensor 4013, and the solenoid valve 4015 that require pneumatic connections can be achieved using air connectors.

[0115] It can be understood that the sensor 4013 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 for obtaining user motion data or posture data (such as gyroscope sensors, acceleration sensors), biosensors for obtaining user biological signals (such as optical heart rate sensors, blood oxygen sensors, bioimpedance sensors, electrocardiogram sensors, skin electrical activity sensors, skin temperature sensors), etc. The embodiments of the present application are not limited to this.

[0116] The processor 402 can be used to control and process information, and use various interfaces and lines to connect the various parts of the entire electronic device (such as electronic device 410 or 420), perform various functions of the electronic device and process data, thereby monitoring the operation of the electronic device as a whole. In the embodiment of the present application, the air pump 4011, the solenoid valve (such as solenoid valve 4014, solenoid valve 4015), and the 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 on-off of the air circuit, and the sensor 4013 is used to obtain the sensing parameters for calculating the blood pressure value 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 obtain the pressure signal or pulse wave signal detected by the sensor 4013 in the airbag 4012. The processor 402 may also be connected to the solenoid valve 4015 to control the solenoid valve 4015 to deflate the airbag 4012 .

[0117] Processor 402 may include one or more processing units. For example, processor 402 may include an application processor (AP), a graphics processing unit (GPU), an image signal processor (ISP), a baseband processor, a modem processor, a 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 may generate operation control signals based on instruction opcodes and timing signals to control instruction fetching and execution.

[0118] Processor 402 may also include a memory for storing instructions and data. For example, the memory in processor 402 may be a cache memory. This memory can store instructions or data that have just been used or are being recycled by processor 402. If processor 402 needs to use the instruction or data again, it can directly retrieve it from the memory. This avoids repeated accesses, reduces the latency of processor 402, and thus improves the efficiency of the electronic device in processing data or executing instructions.

[0119] The 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 the electronic device. Exemplarily, the display component 403 can display blood pressure measurement results. The display component 403 includes a display panel. In some embodiments, the display panel can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode or an active-matrix organic light-emitting diode (AMOLED), a flexible light-emitting diode (FLED), a quantum dot light-emitting diode (QLED), etc.

[0120] The power supply component 404 is used to provide system power to the electronic device and power the various components of the electronic device. The power supply component 404 can support the electronic device to receive charging input. In some embodiments, the 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 by the charging circuit and output it to the battery to complete battery charging. It can also transform the electrical signal input by 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 the battery from overcharging, over-discharging, short circuiting, 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, impedance).

[0121] The memory 405 can be used to store computer-executable program code, which includes instructions. The processor 402 executes the instructions stored in the memory 405 to perform various functional applications and data processing of the electronic device, such as implementing the charging function, wireless communication function, blood pressure detection function, etc. of the electronic device.

[0122] The input / output interface 406 is used to provide a wired connection for the electronic device to charge or communicate. In some embodiments, the input / output interface 406 may include an electrical connector for conducting and transmitting current.

[0123] The wireless communication component 407 can be used to support the electronic device and other devices to perform data exchange via wireless communications such as Bluetooth (BT), global navigation satellite system (GNSS), wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) network), frequency modulation (FM), near field communication (NFC), infrared technology (IR), etc. In some embodiments, the wireless communication component 407 may include a Bluetooth chip. The electronic device can pair with the Bluetooth chip of other electronic devices through the Bluetooth chip and establish a wireless connection, thereby realizing wireless communication between the electronic device and the other device through the wireless connection. The wireless communication component 407 can be one or more devices that integrate at least one communication processing module.

[0124] In some embodiments, Figure 2 The electronic device shown in (a) or (b) may further include an audio component to enable the electronic device to input and output audio signals.

[0125] In some embodiments, Figure 2 In the structure shown, in addition to the airbag 4012, other components or parts can be integrated into Figure 1 The hosts involved, such as host 101, host 201 or host 301.

[0126] It is understood that the structures illustrated in the embodiments of the present application do not constitute specific limitations on electronic devices 410 or 420. In other embodiments of the present application, electronic devices 410 or 420 may include more or fewer components than shown, or may combine or separate certain components, or may have different component arrangements. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0127] In addition, it should be noted that, in addition to using gas to apply pressure to the user's area to be tested, liquid can also be used to apply pressure to the user's area to be tested when measuring blood pressure. In other words, in some embodiments, the airbag 4012 can be replaced with a flexible component that can be filled with liquid. In this case, the detection assembly 401 may not include the air pump 4011.

[0128] For ease of description and understanding, the present embodiment of the application refers to the component that applies pressure to the user's part to be detected as a pressure bag, wherein the pressure bag can be filled with gas or liquid. Figure 2 In the schematic diagram, sensor 4013 can be a pressure sensor capable of measuring the pressure within the pressure bladder or a pulse wave signal sensor capable of measuring a pulse wave signal. Solenoid valve 4015 can be a pressure relief valve capable of relieving the gas or liquid within the pressure bladder. For ease of understanding, the following description of the technical solutions provided in the embodiments of this application uses an air bladder as an example. In other embodiments, the technical solutions provided in the embodiments of this application can also be applied to scenarios where the pressure bladder is filled with liquid.

[0129] As mentioned above, electronic blood pressure monitors measure blood pressure through the inflation and deflation of an airbag. The solenoid valve, a key component in electronic blood pressure monitors that controls the flow of air, directly impacts the accuracy of blood pressure measurements. However, to meet these airtight requirements, the solenoid valves in existing electronic blood pressure monitors are relatively large. With rising living standards, people are becoming increasingly concerned about their health and demanding the ability to dynamically measure their blood pressure anytime, anywhere. This miniaturization and wearability are becoming the development trends for electronic blood pressure monitors. However, the large size of the solenoid valve makes it difficult to accommodate the limited space required by these miniaturized and wearable electronic blood pressure monitors.

[0130] In view of this, the embodiments of the present application provide a solenoid valve that can achieve miniaturization. When the solenoid valve is applied to an electronic blood pressure monitor, it is beneficial to reduce the size of the electronic blood pressure monitor and meet user needs.

[0131] Figures 3 to 5 : shows a schematic structural diagram of a solenoid valve provided in an embodiment of the present application. Specifically, Figure 3 FIG1 shows an assembly diagram of a solenoid valve provided in an embodiment of the present application. Figure 4 1 shows an exploded schematic diagram of a solenoid valve provided in an embodiment of the present application. Figure 5 A cross-sectional schematic diagram of a solenoid valve provided in an embodiment of the present application is shown.

[0132] Combine 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 is provided with a space for accommodating the coil 22 and a second medium flow channel 72. The electromagnetic assembly 2 is fastened to the housing 1 and forms a receiving chamber, which is used to accommodate the reset assembly 3 and the valve core assembly 4, wherein the valve core assembly 4 is arranged between the electromagnetic assembly 2 and the housing 1, and the reset assembly 3 is arranged on the side of the valve core assembly 4 facing (or close to) the electromagnetic assembly 2 and / or on the side of the valve core assembly 4 facing away from the electromagnetic assembly 2. The electromagnetic assembly 2 is used to drive the valve core assembly 4 to move when the coil 22 is energized, and the reset assembly 3 is used to drive the valve core assembly 4 to move when the coil 22 is de-energized, so as to connect or disconnect the first medium flow channel 71 with the second medium flow channel 72.

[0133] In the embodiment of the present application, when the electromagnetic assembly 2 is fastened to the housing 1, the yoke 21 is directly fastened to the housing 1. The yoke 21 actually serves as a portion of the outer shell of the solenoid valve 500. By fastening the yoke 21 to the housing 1, a storage space for other components can be formed, streamlining the device and thus simplifying the structure. This helps to reduce the volume of the entire solenoid valve, thereby meeting the space requirements of electronic equipment, achieving miniaturization of electronic equipment, or improving the space utilization rate within the electronic equipment. In addition, the solenoid valve provided in the embodiment of the present application has a simple structure, making the process simpler and more reliable, improving the dimensional accuracy of the components within the solenoid valve, reducing the difficulty of assembling the solenoid valve, and improving the yield rate. In addition, the medium flow channel is provided on the housing 1 and the yoke 21, which helps to form an overall seal, thereby improving the airtightness of the solenoid valve, and correspondingly improving the corrosion resistance and reliability. Due to the improved sealing of the solenoid valve, when it is used in an electronic blood pressure monitor, it can reduce or avoid air leakage, thereby reducing or avoiding the problem of unstable pressure difference, and improving the measurement accuracy of the electronic blood pressure monitor.

[0134] The structure of the solenoid valve provided in the embodiment of the present application is described in more detail below with reference to the accompanying drawings.

[0135] refer to Figure 4 and Figure 5 The 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 the valve core assembly 4). The first body 211 may be connected to the housing 1. The protrusion 212 is provided with a first accommodating space 213 opening toward the valve core assembly 4. The first accommodating space 213 is used to accommodate the coil 22.

[0136] refer to Figure 5 The housing 1 is provided with a first groove 11 on a side facing the yoke 21. The first groove 11 is used to accommodate the protrusion 212 and the coil 22 accommodated in the first accommodation space 213. In other words, 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 side of the yoke 21, wherein the second body 12 and the extension 13 may form a first groove 11 opening toward the yoke 21. In some embodiments, the first body 211 may also be accommodated in the first groove 11.

[0137] When the shell 1 and the yoke 21 are in a connected state, that is, the shell 1 and the yoke 21 are buckled together, the coil 22 is accommodated in the first accommodating space 213 provided on the protrusion 212, and the protrusion 212 is accommodated in the first groove 11 provided on the shell 1. The valve core assembly 4 is also accommodated in the first groove 11, and at least part 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 shell 1, and the protrusion 212 is accommodated in the first groove 11. The aforementioned accommodating cavity can be formed between the yoke 21 with the coil 22 installed and the shell 1. In the embodiment of the present application, the first medium flow channel 71 and the second medium flow channel 72 can be understood as part of the accommodating cavity.

[0138] Here, a first accommodating space 213 for accommodating coil 22 is provided on yoke 21, thereby achieving a single component to enclose coil 22. The yoke 21 does not need to cooperate with other components to form a mounting groove for accommodating coil 22. This not only facilitates the installation of coil 22 and reduces the difficulty of assembling the solenoid valve, but also effectively saves space, facilitates the miniaturization or micro-manufacturing of the solenoid valve, and facilitates the formation of an overall seal, thereby improving the sealing performance of the solenoid valve. Furthermore, the yoke 21 can transmit the magnetic lines of force generated by the energized coil to the desired location, thereby forming a magnetic field in the desired location and reducing magnetic leakage.

[0139] In some embodiments, the housing 1 and the yoke 21 can be fixedly connected together by welding, bonding, clamping, threading, etc. For example, the housing 1 and the yoke 21 can be connected by fixedly connecting the first body 211 to the extension 13. In the embodiment of the present application, the housing 1 and the yoke 21 are sealed. For example, the portion where the housing 1 and the yoke 21 are connected can be sealed by, for example, dispensing glue, double-sided tape, or deformable materials to achieve overall sealing of the solenoid valve.

[0140] In some embodiments, the housing 1 is an integral structure (or a non-detachable structure), for example, the housing 1 is integrally formed.

[0141] In some embodiments, the yoke 21 is an integral structure (or a non-detachable structure), for example, the yoke 21 is integrally formed.

[0142] The housing 1 and / or the yoke 21 are integrally formed, and the processing technology is simpler.

[0143] In some embodiments, the first body 211 can be connected to the end surface of the extension portion 13 (i.e., the end surface of the extension portion 13 away from the second body 12 in the fastening direction), so that the first body 211 can be located outside the first groove 11. Alternatively, the first body 211 can be connected to the side surface of the extension portion 13 (i.e., the sidewall 112 of the first groove 11), so that the first body 211 is also received in the first groove 11.

[0144] Continue to refer Figure 5 The housing 1 is provided with a first medium flow channel 71, which is connected to the 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 communicate through the first groove 11. Whether the first medium flow channel 71 and the second medium flow channel 72 can communicate through the first groove 11 is controlled by the movement of the valve core assembly 4.

[0145] In the embodiment of the present application, the valve core assembly 4 is disposed between the electromagnetic assembly 2 and the housing 1. Under the action of the electromagnetic assembly 2 and the reset assembly 3, the valve core assembly 4 can move along the engagement direction of the housing 1 and the magnetic yoke 21 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 blocked, that is, the first medium flow channel 71 and the second medium flow channel 72 are disconnected. 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 and does not block 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 communicate through the first groove 11. This situation can also be referred to as the solenoid valve being in an open state 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 to control the opening or blocking of the passage formed by the first groove 11 between the first medium flow channel 71 and the second medium flow channel 72.

[0146] Here, the first medium flow channel 71 and the second medium flow channel 72 are respectively provided on the housing 1 and the yoke 21. When the housing 1 and the yoke 21 are engaged, a space is formed to connect the first medium flow channel 71 and the second medium flow channel 72. In the embodiment of the present application, since the accommodation space is formed by the connection between the housing 1 and the 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.

[0147] 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 the side wall 112 of the first groove 11, and the second opening 712 is provided on a wall of the housing 1 other than the bottom wall 111 and the 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 may be formed on the bottom wall 111 or the side wall 112 of the first groove 11; the first medium flow channel 71 communicates with the exterior of the housing 1 (i.e., the exterior of the solenoid valve), and the second opening 712 may be formed on the outer wall of the housing 1. In the embodiment of the present application, the side wall 112 and the bottom wall 111 of the first groove 11 (or the wall of the shell 1 used to form the accommodating space when the shell 1 and the yoke 21 are buckled together) can be understood as the inner wall of the shell 1, and the wall of the shell 1 away from the first groove 11 (or the wall of the shell 1 exposed to the outside when the shell 1 and the yoke 21 are buckled together) can be understood as the outer wall of the shell 1.

[0148] As an example and not a limitation, for example, the first opening 711 can be provided on the bottom wall 111 of the first groove 11, and the second opening 712 can be provided on the outer wall 141 of the second body 12 away from the first groove 11 (for ease of description, it can also be referred to as the first outer wall 141). For example, the first opening 711 can be provided on the bottom wall 111 of the first groove 11, and the second opening 712 can be provided on the outer wall 142 of the extension portion 13 away from the first groove 11 (for ease of description, it can also be referred to as the second outer wall 142). For another example, the first opening 711 can be provided on the side wall 112 of the first groove 11, and the second opening 712 can be provided on the first outer wall 141. For another example, the first opening 711 can be provided on the side wall 112 of the first groove 11, and the second opening 712 can be provided on the second outer wall 142. When the first opening 711 is provided on the bottom wall 111 of the first groove 11 and the second opening 712 is provided on the first outer wall 141 , the first medium flow channel 71 can be configured by punching, which is a simple process.

[0149] It can be understood that in the embodiment of the present application, since the first medium flow channel 71 connects the first groove 11 with the outside of the shell 1, the first opening 711 and the second opening 712 of the first medium flow channel 71 are not simultaneously arranged on the bottom wall 111 and / or the side wall 112 of the first groove 11, that is, the first opening 711 and the second opening 712 are not simultaneously arranged on the bottom wall 111 of the first groove 11, and are not simultaneously arranged on the side wall 112 of the first groove 11, nor are one opening arranged on the bottom wall 111 of the first groove 11 and the other opening arranged on the side wall 112 of the first groove 11.

[0150] Here, the complete first medium flow channel 71 is formed by a single component, the housing 1, which can improve the sealing performance of the pipeline in the solenoid valve and simplify the assembly difficulty. In addition, when the housing 1 is an integrated structure, its processing technology is simpler.

[0151] In some embodiments, the first medium flow channel 71 may be in the form of a through hole, that is, the center line of the first medium flow channel 71 is a straight line. For example, the first medium flow channel 71 may be a cylindrical hole, a tapered hole, a stepped hole, a threaded hole, and the like.

[0152] The first medium flow channel 71 in the form of a through hole has less resistance to the working medium (such as gas or liquid) of the solenoid valve, allowing the working medium to pass through the first medium flow channel 71 smoothly, thereby improving the response speed and pressure relief efficiency of the solenoid valve and reducing the pressure relief time.

[0153] In some embodiments, reference Figure 5 As shown, the second medium flow channel 72 provided on the magnetic yoke 21 can 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 punching, which simplifies the manufacturing process. It will be understood that the third opening 721 is different from the opening of the first accommodating space 213, that is, the third opening 721 and the opening of the first accommodating space 213 are provided at different positions on the surface of the protrusion 212 facing the bottom wall 111 of the first groove 11.

[0154] Here, the complete second medium flow channel 72 is formed by a single component, the magnetic yoke 21, which can improve the sealing performance of the pipeline in the solenoid valve and simplify the assembly difficulty. In addition, when the magnetic yoke 21 is an integrated structure, its processing technology is simpler.

[0155] In some embodiments, the second medium flow channel 72 may be in the form of a through hole, that is, the center line of the second medium flow channel 72 is a straight line. For example, the second medium flow channel 72 may be a cylindrical hole, a tapered hole, a stepped hole, a threaded hole, or the like.

[0156] The second medium flow channel 72 in the form of a through hole has less resistance to the working medium (such as gas or liquid) of the solenoid valve, allowing the working medium to pass through the second medium flow channel 72 smoothly, thereby improving the response speed and pressure relief efficiency of the solenoid valve and reducing the pressure relief time.

[0157] 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 of the solenoid valve during pressure relief, with a short flow distance and minimal resistance, thereby improving the response speed and pressure relief efficiency of the solenoid valve and reducing the pressure relief time.

[0158] In some embodiments, at least one first accommodating space 213 may be provided on the protrusion 212. The electromagnetic assembly 2 may include at least one coil 22. The at least one first accommodating space 213 corresponds one-to-one with the at least one coil 22. Specifically, one first accommodating space 213 of the at least one first accommodating space 213 is used to accommodate one coil 22 of the at least one coil 22.

[0159] As an example, the protrusion 212 may be provided with a plurality of first accommodating spaces 213. These first accommodating spaces 213 may be arranged in an annular array (e.g., a circular ring, a square ring, a triangular ring, etc.). Accordingly, the coils 22 accommodated in the plurality of first accommodating spaces 213 may form a coil array. When a solenoid valve is provided with multiple coils 22, the coils 22 may be divided into multiple groups to operate in rotation. If one coil group fails, the other coil groups can continue to operate, thereby extending the service life of the solenoid valve.

[0160] As another example, a first receiving space 213 may be provided on the protrusion 212. 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 arranged around the first protrusion 2121. A groove is formed between the first protrusion 2121 and the second protrusion 2122. This groove is the first accommodating space 213 for accommodating the coil 22. For example, the first accommodating space 213 may be annular (e.g., a circular ring, a square ring, a triangular ring, etc.), and the coil 22 accommodated in the first accommodating space 213 may be a toroidal coil. When a single coil 22 is provided in the solenoid valve, circuit connections and wiring layout can be simplified.

[0161] In some embodiments, the third opening 721 of the second medium flow channel 72 can be provided on the surface of the first protrusion 2121 facing the bottom wall 111 of the first groove 11. In this way, when the valve core assembly 4 is used to block or open the third opening 721, the force applied to the valve core assembly 4 is more uniform, thereby improving the blocking effect of the valve core assembly 4.

[0162] In some embodiments, the groove between the first protrusion 2121 and the second protrusion 2122 (ie, the first accommodation space 213 ) is disposed around the second medium flow channel 72 . Accordingly, the coil 22 received in the groove is disposed around the second medium flow channel 72 .

[0163] There are many ways to arrange the reset component 3. As mentioned above, the reset component 3 can be arranged on the side of the valve core component 4 facing the electromagnetic component 2 and / or the side of the valve core component 4 away from the electromagnetic component 2.

[0164] As an example, the reset assembly 3 can be arranged on a side of the valve core assembly 4 facing the electromagnetic assembly 2 , that is, the reset assembly 3 and the electromagnetic assembly 2 can be arranged on the same side of the valve core assembly 4 .

[0165] For example, reference Figure 4 and Figure 5 The reset assembly 3 may include an elastic member 31, which is disposed on the periphery of the protrusion 212, for example, the elastic member 31 is sleeved on the protrusion 212. It is understood that when the protrusion 212 includes the first protrusion 2121 and the second protrusion 2122 mentioned above, the elastic member 31 is sleeved on the second protrusion 2122. One end of the elastic member 31 abuts against the valve core assembly 4, and the other end of the elastic member 31 abuts against the first body 211. More specifically, one end of the elastic member 31 abuts against the surface of the valve core assembly 4 facing the coil 22 (or the elastic member 31), and the other end of the elastic member 31 abuts against the surface of the first body 211 facing the valve core assembly 4.

[0166] 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 the plane. 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 member 31 can abut against this stepped surface. In this way, when the connection between the first body 211 and the extension 13 is sealed by glue dispensing, it can be prevented that the glue overflows onto the elastic member 31 and affects the performance of the elastic member 31.

[0167] In this embodiment, when the coil 22 is not energized (i.e., the coil 22 is not working), the elastic member 31 is in a compressed state, and under the elastic force of the elastic member 31, the valve core assembly 4 rests 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 magnetic force. The valve core assembly 4 includes a magnetic material, which can be attracted by the magnetized yoke 21. The magnetic attraction of the yoke 21 is greater than the elastic force of the elastic member 31. Therefore, the magnetized yoke 21 can overcome the elastic force of the elastic member 31 to attract the valve core assembly 4, thereby driving the valve core assembly 4 to move toward the side of the coil 22, and at the same time, the elastic member 31 is further compressed. When the coil 22 is powered off (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 member 31 tends to return to its original state. Therefore, under the elastic force of the elastic member 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.

[0168] 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 de-energized, the elastic member 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.

[0169] For ease of understanding, the following takes the second medium flow channel 72 communicating with the airbag as an example and combines Figure 5As shown, the working process of the solenoid valve is described. When the electronic blood pressure monitor is not working, the coil 22 is not energized. Under the elastic force of the elastic member 31, the valve core assembly 4 rests 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 an open state. When the electronic blood pressure monitor is inflating the entire device, for example, 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 airbag, and the coil 22 is energized at the same time. Under the magnetic force of the yoke 21, the valve core assembly 4 moves toward the coil 22 and ultimately abuts against the protrusion 212. The valve core assembly 4 blocks the third opening 721 of the second medium flow channel 72, thereby disconnecting the first medium flow channel 71 from the second medium flow channel 72. The solenoid valve is in a closed state, and the gas in the airbag cannot be discharged through the solenoid valve. When the electronic blood pressure monitor is deflated, the coil 22 is de-energized, the magnetic force of the yoke 21 disappears, and under the elastic force of the elastic member 31, the valve core assembly 4 moves away from the coil 22 and ultimately abuts against the bottom wall 111 of the first groove 11. At this point, 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 an open state. The gas in the airbag can be discharged through the solenoid valve, wherein 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.

[0170] It is understood that in other embodiments, the first medium flow channel 71 may also be connected to the airbag, and the working process of the solenoid valve is the same as above, except that the gas flow direction is different when the airbag is deflated. For the sake of brevity, it will not be described here.

[0171] In this example, when coil 22 is energized, the solenoid valve is closed, ensuring the tightness of the pipeline in which the solenoid valve is located and maintaining pressure in the pipeline. When coil 22 is de-energized, the solenoid valve is open, relieving pressure in the pipeline. When coil 22 is not energized, the solenoid valve is normally open.

[0172] In other embodiments, when the coil 22 is not energized, the elastic member 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.

[0173] For ease of understanding, the following takes the first medium flow channel 71 connecting the airbag as an example and combines Figure 6As shown, the working process of the solenoid valve is described. When the electronic blood pressure monitor is not working, the coil 22 is not energized. Under the elastic force of the elastic member 31, the valve core assembly 4 rests against the bottom wall 111 of the first groove 11, and the valve core assembly 4 blocks the first opening 711 of the first medium flow channel 71, so that the first medium flow channel 71 is not connected to the second medium flow channel 72, and the solenoid valve is in a closed state. When the electronic blood pressure monitor is inflating the entire machine, for example, the user clicks the measurement button on the display screen of the electronic blood pressure monitor or presses the measurement button on the electronic blood pressure monitor, the air pump inflates the airbag, and the coil 22 remains in a de-energized state. The solenoid valve is in a closed state, and the gas in the airbag cannot be discharged through the solenoid valve. When the electronic sphygmomanometer is performing the deflation operation of the entire machine, the coil 22 is energized. Under the magnetic force of the yoke 21, the valve core assembly 4 moves toward the side of the coil 22 and finally abuts against the protrusion 212. The valve core assembly 4 does not block the first opening 711 of the first medium flow channel 71, and does not 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 an open state, and the gas in the airbag can be discharged through the solenoid valve, wherein 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.

[0174] It is understood that in other embodiments, the second medium flow channel 72 may also be connected to the airbag, and the working process of the solenoid valve is the same as above, except that the gas flow direction is different when the airbag is deflated. For the sake of brevity, it will not be described here.

[0175] In this example, when coil 22 is energized, the solenoid valve is in the open state, allowing pressure in the pipeline where the solenoid valve is located to be released. When coil 22 is de-energized, the solenoid valve is in the closed state, ensuring the sealing of the pipeline where the solenoid valve is located and thus maintaining pressure in the pipeline. When coil 22 is not energized, the solenoid valve is in the normally closed state.

[0176] In some embodiments, the elastic member 31 may be a spring, a bellows, an elastic block, or other element made of an elastic material (e.g., spring steel, rubber, latex, etc.). When the elastic member 31 is a spring, it may specifically be a metal spring, such as a cylindrical coil spring, a conical coil spring, a convex coil spring, a concave coil 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.

[0177] Among them, the spring diameter and pitch of the cylindrical coil spring are constant, and the spring characteristics are linear. Conical coil springs, convex coil springs, and concave coil springs are all variable diameter coil 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 and can be used individually or in series or in parallel. They withstand static or dynamic loads acting in the axial direction at the upper inner edge and lower outer edge. Air springs are springs that are filled with compressed air in a retractable, sealed container and use the compressibility of air to achieve elastic action. Rubber springs are a type of polymer elastomer made of ordinary rubber. They have large elastic deformation and strong reset ability. They can absorb vibrations, impacts, and noise generated by operating vibrations generated by the machine. Bellows refers to a tubular elastic element formed by connecting foldable corrugated sheets along the folding and retracting direction.

[0178] The elastic member 31 has good elastic deformation ability, is simple to process, and is convenient to arrange. When the coil 22 is not energized, the elastic member 31 is used to drive the valve core assembly 4 to move and keep the valve core assembly 4 in a stable state, which can provide good reliability.

[0179] 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 to block the first medium flow channel 71 or the second medium flow channel 72.

[0180] For example, Figure 5Taking the illustrated structure as an example, the reset assembly 3 includes an elastic member 31. When the coil 22 is energized, it generates a magnetic field, which polarizes the yoke 21, causing it to generate a magnetic force. At this point, the magnetic force of the yoke 21 is greater than the elastic force of the elastic member 31, causing the yoke 21 to attract the partition 42 toward the coil 22. Accordingly, the partition 42 also drives the seal 41 toward the coil 22. When the partition 42 reaches a first stable state, for example, when the partition 42 abuts against the protrusion 212, the seal 41 is positioned, limiting its movement and maintaining its position to block the second medium flow channel 72, thereby maintaining its position to block the solenoid valve flow channel (or pipeline). When the coil 22 is de-energized, the magnetic field of the coil 22 disappears, and the magnetic force of the yoke 21 disappears. The partition 42, under the elastic force of the elastic member 31, moves away from the coil 22. Accordingly, the partition 42 also drives the seal 41 away from the coil 22. When the partition 42 reaches the second stable state, for example, 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).

[0181] For example, Figure 6 Taking the illustrated structure as an example, the reset assembly 3 includes an elastic member 31. When the coil 22 is energized, it generates a magnetic field, which polarizes the yoke 21, causing it to generate a magnetic force. At this point, the magnetic force of the yoke 21 is greater than the elastic force of the elastic member 31, causing the yoke 21 to attract the partition 42 toward the coil 22. Accordingly, the partition 42 also drives the seal 41 toward the coil 22. When the partition 42 reaches a second stable state, for example, when the partition 42 abuts against the protrusion 212, the seal 41 is positioned, where the seal 41 neither blocks the second medium flow channel 72 nor the first medium flow channel 71. In other words, the seal 41 remains in an open position for the solenoid valve flow channel (or pipeline). When the coil 22 is de-energized, the magnetic field of the coil 22 disappears, and the magnetic force of the yoke 21 disappears. The partition 42, under the elastic force of the elastic member 31, moves away from the coil 22. Accordingly, the partition 42 also drives the seal 41 away from the coil 22. When the partition 42 reaches the first stable state, for example, 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 remains in the state of blocking the first medium flow channel 71, that is, the seal 41 remains in the state of blocking the solenoid valve flow channel (or pipeline).

[0182] 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, clamping, bonding, threading, keying, pinning, interference fit, or the like. By way of example and not limitation, the partition 42 can be sleeved onto the seal 41 and fixed to the seal 41 by at least one of the above methods. In this manner, the seal 41 and the partition 42 can be made of different materials based on their respective functions.

[0183] In other embodiments, the sealing member 41 and the partition plate 42 may be integrally formed. In this manner, the assembly process of the valve core assembly 4 may be simplified, and the assembly difficulty may be reduced.

[0184] In some embodiments, the seal 41 can be made of a metal material (such as aluminum, lead, indium, stainless steel, etc.), a non-metallic material (such as rubber, silicone, plastic, ceramic, graphite, synthetic resin, etc.), or a composite material (such as rubber-asbestos board, aerogel felt-polyurethane, etc.). For example, the seal 41 can be made of an elastic material (such as rubber, thermoplastic elastomer, etc.). This allows the seal 41 to have a certain degree of elasticity. When blocking the first medium flow channel 71 or the second medium flow channel 72, the seal 41 deforms to a certain extent, thereby providing good sealing performance.

[0185] In some embodiments, if the seal 41 is used to block the second medium flow channel 72, the end of the seal 41 close to the second medium flow channel 72 (or close to the third opening 721) can protrude toward the third opening 721 relative to the partition 42, which is conducive to the seal 41 forming a good seal at the third opening 721.

[0186] Exemplary, reference 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 is connected to 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 be connected to the first groove 11 through the second groove 81. The second groove 81 is used to accommodate the portion of the seal 41 that protrudes relative to the partition 42 in the direction of the third opening 721. In this way, the thickness of the solenoid valve in the direction of engagement between the housing 1 and the yoke 21 can be reduced while maintaining the sealing performance of the seal 41, which is conducive to miniaturization of the solenoid valve. In addition, the seal 41 has a larger dimension in the engagement direction, which allows for greater deformation and achieves a better sealing effect. In addition, when sealing, a smaller current flowing through the coil 22 can achieve a good sealing effect, thereby reducing the power consumption of the solenoid valve.

[0187] It will be appreciated that in this manner, the radial dimension (e.g., diameter) of the portion of the sealing member 41 protruding from the partition plate 42 toward the third opening 721 is greater than the radial dimension (e.g., diameter) of the third opening 721, so that the sealing member 41 can block the third opening 721. Furthermore, a certain gap exists between the portion of the sealing member 41 protruding from the partition plate 42 toward the third opening 721 and the sidewall of the second groove 81, thereby preventing friction therebetween that could affect the movement of the partition plate 42.

[0188] In some embodiments, if the seal 41 is used to block the first medium flow channel 71, the end of the seal 41 close to the first medium flow channel 71 (or close to the first opening 711) can protrude toward the first opening 711 relative to the partition 42, which is conducive to the seal 41 forming a good seal at the first opening 711.

[0189] Exemplary, reference Figure 6 As shown, a third groove 82 can be provided on the side of the housing 1 facing the yoke 21. The opening of the third groove 82 is located on the bottom wall 111 of the first groove 11. In other words, the third groove 82 and the first groove 11 can form a stepped groove. In other words, the third groove 82 is provided on the bottom wall 111 of the first groove 11. The first medium flow channel 71 is connected to 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 be connected to the first groove 11 through the third groove 82. The third groove 82 is used to accommodate the portion of the seal 41 that protrudes relative to the partition 42 in the direction of the first opening 711. In this way, the thickness of the solenoid valve in the direction of engagement between the housing 1 and the yoke 21 can be reduced while ensuring the sealing performance of the seal 41, which is conducive to miniaturization of the solenoid valve.

[0190] It will be appreciated that in this manner, 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, so that the seal 41 can seal 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, thereby preventing friction therebetween that could affect the movement of the partition 42.

[0191] In some embodiments, an end of the sealing member 41 close to the non-sealed medium flow channel may also protrude relative to the partition plate 42 toward the opening of the non-sealed medium flow channel.

[0192] For example, reference 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 larger than the radial dimension of the portion of the seal 41 protruding relative to the partition 42 toward the first opening 711. In this way, when the partition 42 drives the seal 41 toward the first opening 711 and reaches a stable state, the seal 41 will not block the first opening 711, thereby maintaining communication between the first medium flow channel 71 and the second medium flow channel 72.

[0193] Similarly, when the seal 41 is used to block the first medium flow channel 71, one end of the seal 41 close to the second medium flow channel 72 (or close to the third opening 721) can protrude toward the third opening 721 relative to the partition 42, wherein the radial dimension of the third opening 721 should be larger than the radial dimension of the part of the seal 41 protruding toward the third opening 721 relative to the partition 42.

[0194] For example, reference 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 plate 42 toward the third opening 721. When the partition plate 42 abuts against the protrusion 212 and reaches a stable state, the distance between the portion of the seal 41 protruding relative to the partition plate 42 toward the third opening 721 and the third opening 721 should be greater than zero. In this way, when the partition plate 42 drives the seal 41 toward the third opening 721 and reaches a stable state, the seal 41 will not block the third opening 721, thereby maintaining communication between the first medium flow channel 71 and the second medium flow channel 72.

[0195] Similarly, when the seal 41 is used to block the second medium flow channel 72, one end of the seal 41 close to the first medium flow channel 71 (or close to the first opening 711) can protrude toward the first opening 711 relative to the partition 42, wherein 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 toward the first opening 711 relative to the partition 42 and the first opening 711 should be greater than 0.

[0196] 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 that protrudes toward the second medium flow channel 72 relative to the partition plate 42 can be at least partially accommodated in the second medium flow channel 72, and a gap is provided between the inner wall of the second medium flow channel 72 and the seal 41. In this way, the seal 41 does not block the opening of the second medium flow channel 72.

[0197] 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 that protrudes toward the first medium flow channel 71 relative to the partition plate 42 can be at least partially accommodated in the first medium flow channel 71, and a gap is provided between the inner wall of the first medium flow channel 71 and the seal 41. In this way, the seal 41 does not block the opening of the first medium flow channel 71.

[0198] In some embodiments, the partition 42 may include a magnetic material, such as a permanent magnetic material or a soft magnetic material, so that when the coil 22 is energized, the partition 42 may be attracted by the magnetized yoke 21 and move.

[0199] In some embodiments, the partition 42 is flat. On the one hand, the partition 42 takes up less space, reducing the thickness of the solenoid valve in the direction where the housing 1 and the yoke 21 engage, thereby facilitating miniaturization of the solenoid valve. On the other hand, the flat partition 42 ensures a closed magnetic circuit, thereby ensuring a smooth magnetic circuit.

[0200] In some embodiments, reference Figure 4 As shown, the partition plate 42 may be provided with at least one through hole 411, which is used to connect the first medium flow channel 71 with the second medium flow channel 72 during pressure relief. 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 opposite sides of the partition plate 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 may be provided on the partition plate 42 to connect the passages on the housing 1 and the magnetic yoke 21.

[0201] In some embodiments, reference Figure 5 or Figure 6 As shown, the bottom wall 111 of the first groove 11 can be provided with a protrusion 43. When the coil 22 is not energized or powered off, the partition 42 can abut against the protrusion 43 under the action of the reset assembly 3. This creates a certain gap between the partition 42 and the portion of the bottom wall 111 of the first groove 11 where the protrusion 43 is not provided. This provides ample space for the flow of the working medium when the solenoid valve is in the open state, facilitating rapid pressure relief. Furthermore, the abutment between the partition 42 and the bottom wall 111 of the first groove 11 via the protrusion 43 can avoid parallelism issues caused by large-surface support.

[0202] It can be understood that when the partition 42 abuts against the protrusion 43, the protrusion 43 and the through hole 411 are staggered, 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, avoiding the protrusion 43 from blocking the through hole 411.

[0203] 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 via the protrusion 43. In this way, a space for the working medium to flow may be reserved between the partition 42 and the bottom wall 111 of the first groove 11.

[0204] In some embodiments, the protrusion 43 provided on the bottom wall 111 of the first groove 11 or the partition 42 can be an integral annular component, or include multiple dispersed sub-components (such as arranged in an annular array), so that the partition 42 can be subjected to more balanced force.

[0205] In other embodiments, the protrusion 43 may not be provided on the bottom wall 111 of the first groove 11 or the partition 42, but a connecting channel connecting the through hole 411 and the first medium flow channel 71 may be provided on the housing 1. 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.

[0206] 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 sidewall 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 sidewall 112 of the first groove 11 and the protrusion 212, without passing through the partition 42.

[0207] Combined with the above Figures 4 to 6 This article introduces a setting method of reset component 3. Figures 7 to 9 Another setting method of reset component 3 is introduced, in which Figure 7 1 shows an exploded schematic diagram of a solenoid valve provided in an embodiment of the present application. Figure 8 and Figure 9 The cross-sectional diagram of a solenoid valve provided in the embodiment of the present application is shown. Figures 7 to 9 The solenoid valve 600 in the embodiment shown is Figures 4 to 6 The differences of the solenoid valve 500 of the embodiment shown in FIG. 5 and the other components or parts not described in detail may be referred to in detail. Figures 4 to 6 Description of corresponding parts in the illustrated embodiment.

[0208] As another example, the reset assembly 3 can be arranged on a side of the valve core assembly 4 facing away from the electromagnetic assembly 2 , that is, the reset assembly 3 and the electromagnetic assembly 2 can be arranged on different sides of the valve core assembly 4 .

[0209] refer to Figures 7 to 9, the reset assembly 3 may include a magnetic part 32, and the magnetic part 32 is arranged in the shell 1. For example, a second accommodating space 83 for accommodating the magnetic part 32 may be provided in the shell 1, and the second accommodating space 83 may be close to the bottom wall 111 of the first groove and correspond to the position of the valve core assembly 4. As an example and not a limitation, the shell 1 may include a second main body 12 and an extension portion 13 extending from the periphery (or edge) of the second main body 12 to one side of the yoke 21, and the second main body 12 and the extension portion 13 may form a first groove 11 with an opening facing the yoke 21. The second main body 12 is provided with a second accommodating space 83 for accommodating the magnetic part 32. For the introduction of the yoke 21, the coil 22, the first medium flow channel 71, the second medium flow channel 72 and the first groove 11, please refer to the description of the corresponding parts above. For the sake of brevity, they will not be repeated here.

[0210] In some embodiments, the magnetic component 32 can be embedded in the housing 1 through insert molding. Insert molding involves pre-fixing an insert in an appropriate position in an injection mold before injecting plastic into the mold. After the mold is opened, the insert is tightly encased within the cooled and solidified plastic, resulting in a product with an insert. This integrated product avoids adding a new sealing interface, improving the sealing performance of the solenoid valve without compromising the performance of the magnetic component 32.

[0211] Of course, in other embodiments, the second body 12 may include a first portion and a second portion, and the first portion and the second portion may be fastened together to form a second accommodating space 83 for accommodating the magnetic member 32 .

[0212] The valve core assembly 4 comprises a magnetic material. In this embodiment, when the coil 22 is de-energized (i.e., the coil 22 is not operating), the valve core assembly 4 is attracted by the magnetic member 32 under the magnetic force of the magnetic member 32 and rests against the bottom wall 111 of the first recess 11. When the coil 22 is energized (i.e., the coil 22 is operating), the magnetic material of the valve core assembly 4 is attracted by the magnetized yoke 21. The magnetic attraction of the yoke 21 is greater than the magnetic attraction of the magnetic member 32. Therefore, the magnetized yoke 21 overcomes the magnetic attraction of the magnetic member 32 and attracts the valve core assembly 4, thereby driving the valve core assembly 4 toward the coil 22. When the coil 22 is de-energized (i.e., the coil 22 is not operating), the magnetic field of the coil 22 disappears. Under the magnetic force of the magnetic member 32, the valve core assembly 4 moves toward the bottom wall 11 of the first recess 11, i.e., away from the coil 22, and ultimately rests against the bottom wall 111 of the first recess 11.

[0213] In some embodiments, reference Figure 8When the coil 22 is energized, the magnetized yoke 21 overcomes the magnetic attraction between the magnetic member 32 and the valve core assembly 4, driving 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 de-energized, the magnetic attraction between the magnetic member 32 and the valve core assembly 4 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.

[0214] Figure 8 The working process of the solenoid valve shown is similar to Figure 5 The solenoid valve shown works 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 elastic force of the elastic member 31 and the magnetic attraction between the 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 action of the magnetic attraction between the magnetic member 32 and the valve core assembly 4 (specifically, the partition 42 in the valve core assembly 4) and the magnetic attraction between the yoke 21 and the valve core assembly 4 after the coil 22 is energized. Figure 8 The working process of the solenoid valve shown can be referred to Figure 5 For the sake of brevity, the description of the relevant parts will not be repeated here.

[0215] In other embodiments, reference Figure 9 When the coil 22 is de-energized, the magnetic attraction between the magnetic member 32 and the valve core assembly 4 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 magnetic yoke 21 overcomes the magnetic attraction between the magnetic member 32 and the valve core assembly 4, driving the valve core assembly 4 to open the first medium flow channel 71, thereby connecting the first medium flow channel 71 with the second medium flow channel 72.

[0216] Figure 9 The working process of the solenoid valve shown is similar to Figure 6 The solenoid valve shown works 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 elastic force of the elastic member 31 and the magnetic attraction between the 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 action of the magnetic attraction between the magnetic member 32 and the valve core assembly 4 (specifically, the partition 42 in the valve core assembly 4) and the magnetic attraction between the yoke 21 and the valve core assembly 4 after the coil 22 is energized. Figure 9The working process of the solenoid valve shown can be referred to Figure 6 For the sake of brevity, the description of the relevant parts will not be repeated here.

[0217] In the embodiment of the present application, when the reset assembly 3 adopts the magnetic member 32, the valve core assembly 4 moves under the action of the magnetic force, which can make the force on the valve core assembly 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 the occurrence of tilting and jamming, making the movement of the valve core assembly 4 smoother, thereby helping 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 member 32 is used as the reset assembly, the outer periphery of the protrusion 212 and the side wall 112 of the first groove 11 can be tightly fitted (for example, connected together) or a small gap can be set between the two, which can reduce the volume of the solenoid valve and facilitate the miniaturization of the solenoid valve.

[0218] In some embodiments, when the 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 . Accordingly, the periphery of the first body 211 is flush with the periphery of the protrusion 212 .

[0219] In some embodiments, when the valve core assembly 4 includes a seal 41 and a partition 42, the magnetic member 32 is located above the partition 42. In other words, the projection of the magnetic member 32 in the direction of engagement between the housing 1 and the yoke 21 at least partially overlaps with the projection of the partition 42 in the direction of engagement between the housing 1 and the yoke 21. This effectively leverages the magnetic force of the magnetic member 32, ensuring more uniform force on the partition 42 and smoother movement, while also enhancing the sealing effect of the seal 41.

[0220] In some embodiments, the magnetic member 32 comprises a permanent magnetic material or a soft magnetic material. In this embodiment of the present application, to enable the magnetic member 32 to attract the valve core assembly 4 (specifically, the diaphragm 42), at least one of the magnetic member 32 and the valve core assembly 4 comprises a permanent magnetic material. For example, the magnetic member 32 may be a permanent magnet and the diaphragm 42 may be a soft magnet; alternatively, the magnetic member 32 may be a soft magnet and the diaphragm 42 may be a permanent magnet; or both the magnetic member 32 and the diaphragm 42 may be permanent magnets.

[0221] In some embodiments, at least one second accommodating space 83 may be provided on the housing 1, and the reset assembly 3 may include at least one magnetic member 32. The at least one second accommodating space 83 corresponds one-to-one with the at least one magnetic member 32. Specifically, one of the at least one second accommodating space 83 is used to accommodate one of the at least one magnetic member 32.

[0222] As an example, a plurality of second accommodating spaces 83 may be provided on the shell 1, and the plurality of second accommodating spaces 83 may be arranged in a ring array (such as a circular ring, a square ring, a triangular ring, etc.), and accordingly, the magnetic parts 32 accommodated in the plurality of second accommodating spaces 83 may form a magnet array.

[0223] As another example, a second accommodating space 83 may be provided on the housing 1. For example, the second accommodating space 83 may be annular (e.g., circular, square, or triangular), and the magnetic member 32 accommodated in the second accommodating space 83 may be an annular magnet. An integrated annular magnet facilitates installation and improves the assembly efficiency of the solenoid valve.

[0224] As another example, the reset component 3 can be arranged on the side of the valve core component 4 facing the electromagnetic component 2 and the side away from the electromagnetic component 2, that is, the reset component 3 can be arranged on both sides of the valve core component 4. Figures 4 to 6 as well as Figures 7 to 9 The reset assembly 3 may include an elastic member 31 and a magnetic member 32, wherein the elastic member 31 and the coil 22 are arranged on the same side of the valve core assembly 4, and the magnetic member 32 and the coil 22 are arranged on different sides of the valve core assembly 4. Accordingly, the working process of the solenoid valve can refer to the above description of Figures 4 to 9 For the sake of brevity, the relevant description will not be repeated here.

[0225] When the reset assembly 3 includes both the elastic member 31 and the magnetic member 32 , double insurance can be provided for the resetting of the valve core assembly 4 , thereby reducing the failure rate of the reset assembly 3 .

[0226] In the embodiment of the present application, one of the first medium flow channel 71 and the second medium flow channel 72 described above serves as the inlet flow channel of the solenoid valve, and the other serves as the outlet flow channel. If the working medium is gas, one of the first medium flow channel 71 and the second medium flow channel 72 serves as the inlet flow channel, and the other serves as the exhaust flow channel. If the working medium is liquid, one of the first medium flow channel 71 and the second medium flow channel 72 serves as the liquid inlet flow channel, and the other serves as the liquid outlet flow channel.

[0227] In some embodiments, reference Figures 4 to 9 The solenoid valve provided in the embodiment of the present application, such as the solenoid valve 500 or the solenoid valve 600, may further include an electrical connector 5, which is used to be electrically connected to the coil 22, thereby providing an electrical signal to the coil 22.

[0228] In some embodiments, the electrical connector 5 may be fixed to an outer wall (eg, the second outer wall 142 ) of the housing 1 .

[0229] In some embodiments, Figure 9For example, the yoke 21 may be provided with a wiring hole 84 communicating with the first accommodation space 213. The wiring hole 84 is used to electrically connect the electrical connector 5 to the coil 22 accommodated in the first accommodation space 213. For example, the coil lead may pass through the wiring hole 84 and be welded to the electrical connector 5.

[0230] In some embodiments, the wiring hole 84 can be sealed by using glue, double-sided tape or deformable materials to ensure the sealing performance of the solenoid valve.

[0231] In some embodiments, reference Figures 4 to 9 The solenoid valves provided in the embodiments of the present application, such as the solenoid valve 500 or the solenoid valve 600, may further include a dustproof assembly 6. When the solenoid valve is miniaturized, it is more sensitive to particulate matter. The dustproof assembly 6 can prevent foreign matter such as dust from entering the solenoid valve, thereby preventing the solenoid valve from affecting its normal function.

[0232] In some embodiments, the dustproof component 6 may include a mesh with micropores to block dust. Here, the working medium of the solenoid valve can pass through the dustproof component 6.

[0233] In some embodiments, the dustproof component 6 can be provided at the inlet flow channel and / or outlet flow channel of the solenoid valve. Figure 5 、 Figure 6 、 Figure 8 or Figure 9 The first medium flow channel 71 can be an outlet flow channel, and the dustproof assembly 6 can be disposed at the opening where the first medium flow channel 71 connects to the exterior of the housing 1, i.e., the second opening 712. The second medium flow channel 72 is an inlet flow channel, and the dustproof assembly 6 can also be disposed at the opening where the second medium flow channel 72 connects to the airbag, such as the fourth opening 722. Of course, in other embodiments, the dustproof assembly 6 can also be disposed in the air path between the inlet flow channel of the solenoid valve and the airbag.

[0234] In some embodiments, the dustproof component 6 can be fixed to the solenoid valve (specifically, the housing 1) by bonding, welding, clamping or other fixing methods.

[0235] In some embodiments, Figure 9 For example, the first outer wall 141 of the housing 1 can be provided with a fourth groove 85 whose opening faces away from the valve core assembly 4. The first medium flow channel 71 is connected to 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 in the housing 1, which can reduce the thickness of the solenoid valve in the direction in which the housing 1 and the yoke 21 engage, thereby facilitating the miniaturization of the solenoid valve. Similarly, the fourth groove 85 can also be provided on the side of the first body 211 facing away from the protrusion 212 to install the dustproof assembly on the second medium flow channel 72.

[0236] Combination of the above Figures 3 to 9 The structure of the solenoid valve provided in the embodiment of the present application is described. In the embodiment of the present application, the overall size of the solenoid valve can be reduced due to the simplification of the components of the solenoid valve. As an example and not a limitation, Figure 3 As shown, the solenoid valve provided in the embodiment of the present application can be roughly 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, 3.5mm, etc. The miniaturization of the solenoid valve can reduce the space it occupies in the electronic device, which is conducive to the miniaturization of the electronic device. However, it is understandable that Figure 3 The shape of the solenoid valve shown is only exemplary. The appearance of the solenoid valve can also be designed into other shapes according to actual needs, such as a square, etc., which is not limited in the embodiments of the present application.

[0237] Figures 10 to 12 The schematic structural diagram of a pressure-charging and pressure-releasing assembly provided in an embodiment of the present application is shown. Figure 10 FIG1 shows an assembly diagram of a pressure charging and releasing component provided in an embodiment of the present application. Figure 11 1 shows an exploded schematic diagram of a pressure charging and releasing assembly provided in an embodiment of the present application. Figure 12 A cross-sectional schematic diagram of a pressure charging and discharging assembly provided in an embodiment of the present application is shown.

[0238] refer to Figures 10 to 12 As shown, the pressure-charging and pressure-releasing assembly 700 may include a solenoid valve 701, a base 702, and a pressure capsule 703. The solenoid valve 701 is connected to the base 702, and the base 702 is used to connect the flow channel between the pressure capsule 703 and the solenoid valve 701. In the embodiment of the present application, one of the first medium flow channel 71 and the second medium flow channel 72 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 following takes the second medium flow channel 72 as the inlet flow channel of the solenoid valve 701 and the first medium flow channel 71 as the outlet flow channel of the solenoid valve 701 as an example. Accordingly, the base 702 is connected to the yoke 21 of the solenoid valve 701.

[0239] The solenoid valve 701 may be the solenoid valve 500 or the solenoid valve 600 described above. For an introduction to the solenoid valve 701 , reference may be made to the aforementioned description of the solenoid valve 500 or the solenoid valve 600 . For the sake of brevity, details will not be repeated here.

[0240] refer to Figure 11 or Figure 12The base 702 is provided with a third medium flow channel 73. The third medium flow channel 73 includes a fifth opening 731 and a sixth opening 732. The fifth opening 731 is provided on the surface of the base 702 facing the magnetic yoke 21, and the fifth opening 731 is opposite the fourth opening 722 of the second medium flow channel 72. The sixth opening 732 is provided on the surface of the base 702 other than the surface connected to the magnetic yoke 21. The third medium flow channel 73 is located inside the base 702, that is, the base 702 can form a complete third medium flow channel 73. This can improve the sealing of the pipeline and simplify the assembly difficulty. In addition, 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 channel direction can be designed according to actual needs. There is no need to lay out the pipeline at the solenoid valve 701 through a sleeve. This can make the shape of the solenoid valve 701 and the entire pressure relief assembly more regular, reduce the overall size, and thus meet the extreme space requirements of electronic devices such as wearable products.

[0241] In the embodiment of the present application, the third medium flow channel 73 (specifically, the sixth opening 732) in the base 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, another component having a medium flow channel can be provided between the base 702 and the pressure bladder 703 to connect the third medium flow channel 73 and the pressure bladder, which is not limited in the embodiment of the present application.

[0242] The connection between the base 702 and the solenoid valve 701 can be detachable or non-detachable, which is not limited in the embodiments of the present application. For example, the base 702 and the solenoid valve 701 can be fixedly connected by bonding, welding, clamping, threading, etc. In some embodiments, the base 702 can also serve as a 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 is connected to the non-outlet flow channel of the first medium flow channel 71 and the second medium flow channel 72.

[0243] In the embodiment of the present application, when the base 702 is connected to the yoke 21 , since the yoke is made of metal material, the surface connected to the base 702 can have good flatness, which makes it easy to ensure the sealing when the base 702 and the yoke 21 are connected.

[0244] In some embodiments, the pressure bag 703 can be filled with gas, and in this case, the pressure bag 703 is an air bag. The pressure filling and releasing assembly 700 provided in the embodiment of the present application can be applied to an electronic blood pressure meter such as Figure 2 The electronic device 410 or 420 shown, combined with Figure 2 As well as the corresponding drawings involved, the specific working process can be as follows.

[0245] Case 1: The solenoid valve coil 22 is energized to block the second medium flow channel 72, refer to Figure 5 or Figure 8 .

[0246] When the electronic blood pressure monitor is inflating, for example, when the user clicks the measurement button on the display or presses the measurement button on the monitor, the processor 402 controls the air pump 4011 to inflate the pressure capsule 703 and simultaneously energizes the coil 22, causing the yoke 21 to magnetize and overcome the force of the reset assembly 3, thereby attracting the valve core assembly 4 toward the coil 22. When the valve core assembly 4 reaches a stable state, it blocks the third opening 721 of the second medium flow channel 72, sealing the air path of the solenoid valve and the air path of the base 702. At this point, the gas in the pressure capsule 703 cannot be discharged through the solenoid valve.

[0247] When the electronic sphygmomanometer is deflation-free, for example, when the processor 402 detects that the measurement is complete or obtains the measurement result, the processor 402 can control the coil 22 to be de-energized, so that the magnetic force of the yoke 21 disappears. Under the force of the reset assembly 3, the valve core assembly 4 moves toward the side 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 an open state, and the air path of the solenoid valve is connected to the air path of the base 702. The gas in the pressure bag 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.

[0248] In case 1, the coil 22 is energized during inflation to keep the air path sealed, and is de-energized at other times to keep the air path open, so that the pressure in the entire air path is balanced with the external pressure, which can extend the service life of the sealing device.

[0249] Case 2: When the solenoid valve coil 22 is not energized, it is used to block the first medium flow channel 71. Figure 6 or Figure 9 .

[0250] When the electronic blood pressure monitor is inflating, for example, when a user clicks the measurement button on the display or presses the measurement button on the electronic blood pressure monitor, the processor 402 controls the air pump 4011 to inflate the pressure capsule 703 while simultaneously controlling the coil 22 to remain 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, maintaining a sealed state between the air path of the solenoid valve and the air path of the base 702. At this point, the air in the pressure capsule 703 cannot be discharged through the solenoid valve.

[0251] When the electronic sphygmomanometer is deflation-free, for example, when the processor 402 detects that the measurement is complete or obtains the measurement result, the processor 402 can control the coil 22 to be energized, causing the magnetic yoke 21 to be magnetized and overcome the force of the reset assembly 3 to attract the valve core assembly 4 to move toward 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 an open state, and the gas path of the solenoid valve is connected to the gas path of the base 702. The gas in the pressure bag 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.

[0252] When measuring blood pressure, the inflation time is generally longer than the deflation time. In case 2, the coil 22 is energized only when it is deflated. The air path can be sealed without the need to keep the power on during the inflation process, thereby reducing energy consumption.

[0253] It can be understood that in Case 1 and Case 2, when the pressure bag 703 is deflated, the processor 402 can also control the air pump 4011 to deflate the pressure bag 703.

[0254] It should be noted that, in the above embodiment, 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. For example, the working medium flows from the third medium flow channel 73 through the second medium flow channel 72 and then out of the first medium flow channel 71. Here:

[0255] For 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;

[0256] For 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;

[0257] For 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;

[0258] 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 inlet of the solenoid valve, and the first opening 711 and the second opening 712 are the flow channel outlet of the solenoid valve.

[0259] In addition, the coil 22 involved in the embodiment of the present application should be understood in a broad sense. It can be a winding element, that is, a basic unit that constitutes a winding, which is mainly made of one or more turns of insulated wire wound in a certain shape; it can also be a coil group, that is, a plurality of winding elements are connected to form; it can also be a winding, that is, a plurality of winding elements or coil groups are connected together according to a certain rule.

[0260] An embodiment of the present application further provides a wearable device, which may include the solenoid valve (such as the solenoid valve 500 or the solenoid valve 600) or the pressure charging and discharging assembly 700 involved in the aforementioned embodiments.

[0261] In some embodiments, the wearable device may further include a strap for attaching the pressure bag 703 to a body part of the user. For example, the body part of the user includes any one of a wrist, an arm, and an ankle.

[0262] In some embodiments, the pressure bladder 703 is enclosed in a strap.

[0263] In some embodiments, the wearable device may further include a pump, which is used to inflate the pressure bag 703. Exemplarily, the pump may be an air pump or a liquid pump.

[0264] In some embodiments, the wearable device may further include a pressure sensor for detecting the pressure in the pressure bladder 703 .

[0265] In some embodiments, the wearable device can be used to measure the user's blood pressure, such as an electronic blood pressure monitor. More specifically, the wearable device can be a blood pressure watch.

[0266] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A solenoid valve, characterized in that: include: A housing, the housing being an integral structure, provided with a first groove and a first medium flow channel, an opening of the first medium flow channel being formed on a bottom wall or a side wall of the first groove; An electromagnetic assembly, comprising a magnetic yoke and a coil, wherein the magnetic yoke is an integral structure, the magnetic yoke is provided with a separated second medium flow channel and a first accommodating space opening toward the bottom wall of the first groove, the coil being accommodated in the first accommodating space, the electromagnetic assembly being engaged with the housing to form an accommodating cavity, wherein the magnetic yoke comprises a first body and a protrusion protruding from a surface of the first body, the first accommodating space being provided on the protrusion, an opening of the second medium flow channel being formed on a surface of the protrusion facing the bottom wall of the first groove, the protrusion being accommodated in the first groove, and the first body being connected to the housing; A valve core assembly is accommodated in the accommodating cavity, and the valve core assembly is arranged between the electromagnetic assembly and the housing; a reset assembly, accommodated in the accommodating cavity, wherein the reset assembly is arranged on a side of the valve core assembly facing the electromagnetic assembly and / or a side of the valve core assembly facing away from the electromagnetic assembly; 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 and the second medium flow channel.

2. The solenoid valve according to claim 1, characterized in that The housing includes a second body and an extension portion extending from a periphery of the second body toward the yoke. The second body and the extension portion form the first groove. The first body is connected to an end surface of the extension portion.

3. The solenoid valve according to claim 1, characterized in that The first medium flow channel is in communication with the first groove; The second medium flow channel is communicated with 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 provided on a surface of the first body away from the bottom wall of the first groove.

5. The solenoid valve according to any one of claims 1 to 3, characterized in that: The protrusion includes a first protrusion and a second protrusion, the second protrusion is arranged around the first protrusion, and the first accommodation space is formed between the first protrusion and the second protrusion.

6. The solenoid valve according to claim 5, characterized in that A plurality of first accommodating spaces are formed between the first protrusion and the second protrusion, and the electromagnetic assembly includes a plurality of the coils, wherein the plurality of the first accommodating spaces correspond to the plurality of the coils in a one-to-one manner.

7. The solenoid valve according to claim 5, characterized in that The first accommodation space is annular.

8. The solenoid valve according to claim 5, characterized in that The one opening of the second medium flow channel is provided on a surface of the first protrusion facing the bottom wall of the first groove.

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

10. The solenoid valve according to claim 9, characterized in that The protrusion includes a first protrusion and a second protrusion, the second protrusion is arranged around the first protrusion, and the elastic member is sleeved on the second protrusion.

11. The solenoid valve according to claim 9, characterized in that The other end of the elastic member abuts against a plane of the first body facing the valve core assembly.

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

13. The solenoid valve according to claim 9, characterized in that The elastic member 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 member is in a compressed state. Under the magnetic force of the magnetic yoke and the elastic force of the elastic member, the valve core assembly abuts against the protrusion.

15. The solenoid valve according to any one of claims 1 to 3, characterized in that: The reset assembly includes a magnetic component, which is accommodated in a second accommodating space set on the shell. 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 component and the coil are respectively arranged on both sides of the valve core assembly, and there is magnetic attraction between the magnetic component and the valve core assembly.

16. The solenoid valve according to claim 15, characterized in that The magnetic component is embedded in the housing through 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 member, 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, and 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 solenoid valve according to any one of claims 1 to 3, characterized in that: The valve core assembly includes a sealing member and a partition. The partition is used to drive the sealing member to move under the drive of the electromagnetic assembly or the reset assembly to block the first medium flow channel or the second medium flow channel.

20. The solenoid valve according to claim 19, characterized in that One end of the sealing member close to the first medium flow channel protrudes toward the first medium flow channel relative to the partition plate, and / or One end of the sealing member close to the second medium flow channel protrudes toward the second medium flow channel relative to the partition plate.

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

22. The solenoid valve according to claim 20, characterized in that In the case where the sealing member is used to block the first medium flow channel, when the valve core assembly abuts against the protrusion, a portion of the sealing member protruding toward the second medium flow channel relative to the partition is at least partially accommodated in the second medium flow channel, and a gap is formed between an inner wall of the second medium flow channel and the sealing member; or In the case where the seal is used to seal 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 accommodated 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 comprises permanent magnetic material or soft magnetic material.

24. The solenoid valve according to claim 19, wherein The partition is provided with at least one through hole, and the through hole 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 A protrusion is provided on the bottom wall of the first groove or on the surface of the partition facing the bottom wall of the first groove, and the partition and the bottom wall of the first groove are abutted against each other through the protrusion, wherein the protrusion is staggered with the through hole, and a gap is formed between the bottom wall of the first groove and the partition in the area where the protrusion is not provided.

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

27. The solenoid valve according to any one of claims 1 to 3, characterized in that The solenoid valve further includes a dustproof component, which is arranged 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, characterized in that The shell is further provided with a fourth groove, the opening of the fourth groove 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, and the dustproof component is accommodated in the fourth groove and covers the other opening.

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

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

31. The solenoid valve according to any one of claims 1 to 3, characterized in that The solenoid valve further includes a base connected to the housing or the magnetic yoke, wherein a third medium flow channel is provided on the base, 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 solenoid valve according to any one of claims 1 to 3, characterized in that The working medium of the solenoid valve is gas or liquid.

33. A wearable device, characterized in that: include: An airbag and a solenoid valve according to any one of claims 1 to 32, wherein the airbag is in communication with the solenoid valve; When the airbag is inflated, the first medium flow channel and the second medium flow channel of the solenoid valve are isolated; When the airbag is deflated, the first medium flow channel of the solenoid valve is communicated with the second medium flow channel.

34. The wearable device according to claim 33, wherein: The wearable device further includes a strap, which is used to strap the airbag to a body part of the user.

35. The wearable device according to claim 34, wherein: The airbag is enclosed in the strap.

36. The wearable device according to claim 34 or 35, wherein: The user's body part includes any one of a wrist, an arm, and an ankle.

37. The wearable device according to any one of claims 33 to 35, characterized in that The wearable device further includes an air pump, which is used to inflate the airbag.

38. The wearable device according to any one of claims 33 to 35, characterized in that The wearable device further includes a pressure sensor, which is used to detect the pressure in the airbag.

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

40. The wearable device according to claim 39, wherein: The base body is connected to the magnetic yoke.

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

42. The wearable device according to claim 39, wherein: The magnetic yoke is made of metal material.

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