Air valve and electronic equipment

Abstract

The invention relates to an air valve and electronic equipment. The air valve comprises a shell, a metal core body, a coil, a movable part and a magnetic response elastic body. And the shell is provided with an air outlet hole. The metal core body is provided with air inlet holes, at least part of the metal core body is located in the shell, the air inlet holes and the air outlet holes are arranged at intervals, and the coil is wound around the metal core body. The movable part is located between the air outlet and the air inlet. The magnetic response elastomer is located between the movable part and the metal core body. When the coil is powered on, the metal core body and the magnetic response elastic body can generate magnetic force, the magnetic response elastic body deforms, the movable part gets close to and blocks the air inlet hole under the action of the magnetic force, and the air inlet hole is disconnected from the air outlet hole. When the coil is powered off, the magnetic response elastomer recovers deformation, the movable part is away from the air inlet, and the air inlet is communicated with the air outlet. According to the embodiment of the invention, by arranging the magnetic response elastic body, miniaturization of the air valve is facilitated, and the initial magnetic force borne by the movable part is increased.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air valves, in particular to an air valve and an electronic device. BACKGROUND

[0002] With the improvement of living standards, people pay more and more attention to their own health status. Blood pressure is one of the key indicators related to physical health, and people require that blood pressure can be measured very conveniently, which continuously promotes electronic sphygmomanometers to be more and more portable and integrated. The air valve is a key component in the electronic sphygmomanometer, which controls the on-off of the air path and affects the inflation and deflation. The existing air valve is large in size, and the movable part used for plugging the air inlet hole has the risk of not being able to be sucked, and cannot effectively plug the air inlet hole of the air valve. SUMMARY

[0003] The embodiments of the present application provide an air valve and an electronic device. The embodiments of the present application realize the miniaturization of the air valve and increase the suction force on the movable part by reasonably designing the structure of the air valve, which is conducive to effectively and quickly plugging the air inlet hole by the movable part.

[0004] In a first aspect, the embodiments of the present application provide an air valve. The air valve comprises a shell, a metal core, a coil, a movable part and a magnetic response elastomer. The shell is provided with an air outlet hole. The metal core is provided with an air inlet hole, the metal core is at least partially located in the shell, the air inlet hole is arranged in a spaced manner with the air outlet hole, and the coil is arranged around the metal core. The movable part is located between the air outlet hole and the air inlet hole. The magnetic response elastomer is located between the movable part and the metal core. When the coil is energized, the metal core and the magnetic response elastomer can generate magnetic force, the magnetic response elastomer is deformed, the movable part is attracted to the air inlet hole under the action of the magnetic force and plugs the air inlet hole, and the air inlet hole is disconnected with the air outlet hole; when the coil is de-energized, the magnetic response elastomer restores the deformation, the movable part is away from the air inlet hole, and the air inlet hole is connected with the air outlet hole. It can be understood that at least part of the structure of the movable part is a soft magnetic material, which can be magnetically conductive and can be attracted by the magnetic force of the metal core and the magnetic response elastomer.

[0005] The application embodiment sets the magnetic response elastic body in the gap between the metal core and the movable element, which is beneficial to the miniaturization of the air valve and can increase the magnetic force on the movable element. It can be understood that, in order to miniaturize the air valve, the gap between the metal core and the movable element is usually small. Compared with a small-sized spring or other elastic element, the small-sized magnetic response elastic body is simple to manufacture and does not need to increase the gap between the metal core and the movable element to set the magnetic response elastic body, which is beneficial to the miniaturization of the air valve. In addition, the magnetic response elastic body is set between the metal core and the movable element, which does not increase the size of the air valve in other directions and is beneficial to the miniaturization of the air valve as a whole.

[0006] In the application embodiment, when the coil is energized, the movable element is close to and blocks the air inlet hole under the magnetic force of the metal core and the magnetic response elastic body. Compared with the design of only setting the metal core, the magnetic force of the magnetic response elastic body on the movable element is increased, which is beneficial to increase the power of the movement of the movable element towards the air inlet hole. In addition, the magnetic response elastic body is located in the gap between the metal core and the movable element, and the magnetic response elastic body replaces part of the air in the gap between the metal core and the movable element. The magnetic permeability of air is low, and the magnetic permeability of the magnetic response elastic body is higher than that of air. The initial magnetic force of the metal core and the magnetic response elastic body on the movable element is increased, and the risk of the movable element not being attracted down in the initial state (which can be understood as the moment when the coil is energized, and the movable element is about to be attracted down by the magnetic force to block the air inlet hole) to block the air inlet hole is reduced.

[0007] In a possible implementation, the magnetic response elastic body includes an elastic base and soft magnetic particles, and the soft magnetic particles are distributed in the elastic base. The soft magnetic particles can be magnetized by the magnetic field of the coil, and the elastic base can be deformed. When the coil is energized, a magnetic field is generated, the magnetic response elastic body is deformed and the size is reduced. When the coil is deenergized, the magnetic field disappears, and the magnetic response elastic body restores the deformation and the size is increased to support the movable element.

[0008] In a possible implementation, the magnetic response elastic body is fixed to the movable element, or the magnetic response elastic body is fixed to the metal core. The magnetic response elastic body can be fixed to the movable element and in contact with the metal core, and can be used to support the movable element. Alternatively, the magnetic response elastic body is fixed to the metal core and in contact with the movable element, and can be used to support the movable element. Alternatively, one side of the magnetic response elastic body is fixed to the movable element, and the other side of the magnetic response elastic body is fixed to the metal core. The fixing position of the magnetic response elastic body in the application embodiment is flexible, the fixing mode is simple, and the magnetic response elastic body can be fixed by gluing.

[0009] In a possible implementation, the number of the magnetic responsive elastomers is two, and the two magnetic responsive elastomers are a first magnetic responsive elastomer and a second magnetic responsive elastomer respectively; the metal core body includes a first core body and a second core body arranged at intervals, the first core body surrounds the second core body, and the air inlet hole penetrates through the second core body; the first magnetic responsive elastomer is located between the first core body and the movable element, and the second magnetic responsive elastomer is located between the second core body and the movable element. In the embodiment of the application, the magnetic responsive elastomers are arranged in two, which can increase the magnetic force of the magnetic responsive elastomers on the movable element, occupy more space between the metal core body and the movable element, reduce the air in the gap between the metal core body and the movable element, increase the initial magnetic force of the metal core body and the magnetic responsive elastomers on the movable element, and reduce the risk that the movable element cannot be attracted in the initial state and cannot block the air inlet hole.

[0010] In a possible implementation, the movable element is provided with a through hole, the through hole is located outside the area surrounded by the second magnetic responsive elastomer on the movable element, the second magnetic responsive elastomer includes a first part and a second part, a gap is arranged between the first part and the second part, and when the movable element is away from the air inlet hole, the air inlet hole and the air outlet hole are communicated through the gap and the through hole. In the embodiment of the application, the second magnetic responsive elastomer is divided into at least two parts by the gap, for gas flow, and the gas passing through the air inlet hole can pass through the gap, the through hole and the air outlet hole in sequence.

[0011] In a possible implementation, the through hole is arranged correspondingly with the gap. In the embodiment of the application, the through hole and the gap are arranged correspondingly, so that the distance between the through hole and the gap is relatively short, and the gas passing through the gap can pass through the through hole in time to flow to the air outlet hole, which is beneficial to increase the inflation rate. When the through hole and the gap are not arranged correspondingly, the distance between the through hole and the gap is relatively far, which is not conducive to the timely flow of the gas to the air outlet hole.

[0012] In a possible implementation, a size of the first magnetic response elastomer in a first direction is greater than a size of the first core body in the first direction, the first direction being perpendicular to an arrangement direction of the metal core body and the movable element. In the embodiment of the application, by setting the size of the first magnetic response elastomer in the first direction to be greater than the size of the first core body in the first direction, it is beneficial to prevent the movable element from being dislocated with the metal core body in the first direction during movement of the movable element in the second direction (the second direction being the arrangement direction of the metal core body and the movable element), so that the magnetic response elastomer cannot contact the metal core body, and the magnetic response elastomer cannot support the movable element. When the size of the first magnetic response elastomer in the first direction is greater than the size of the first core body in the first direction, even if the movable element is offset in the first direction, the magnetic response elastomer can contact the metal core body, the magnetic response elastomer can support the movable element, and it is beneficial to improve the functional reliability of the gas valve.

[0013] In a possible implementation, a size of the second magnetic response elastomer in a first direction is greater than a size of a contact portion of the second core body in the first direction, the contact portion being configured to contact the second magnetic response elastomer, the first direction being perpendicular to an arrangement direction of the metal core body and the movable element. In the embodiment of the application, by setting the size of the second magnetic response elastomer in the first direction to be greater than the size of the contact portion of the second core body in the first direction, it is beneficial to prevent the movable element from being dislocated with the metal core body in the first direction during movement of the movable element in the second direction, so that the magnetic response elastomer cannot contact the metal core body, and the magnetic response elastomer cannot support the movable element. When the size of the second magnetic response elastomer in the first direction is greater than the size of the contact portion of the second core body in the first direction, even if the movable element is offset in the first direction, the magnetic response elastomer can contact the metal core body, the magnetic response elastomer can support the movable element, and it is beneficial to improve the functional reliability of the gas valve.

[0014] In a possible implementation, the movable element includes a fixedly connected partition plate and a rubber plug, the magnetic responsive elastomer is located between the partition plate and the metal core, and the rubber plug protrudes from the partition plate. The partition plate can be provided with a mounting hole, and the rubber plug is located in the mounting hole and fixed to the partition plate, or the partition plate can not be provided with a mounting hole, and the rubber plug can be fixed to the surface of the partition plate by means of gluing or the like. The rubber plug is made of an elastic material such as silica gel and the like, and can be compressed to block the air inlet hole. The side of the rubber plug facing the air inlet hole is provided with a first protrusion, and when the rubber plug blocks the air inlet hole, the first protrusion is in line contact with the metal core, or the side of the metal core facing the rubber plug is provided with a second protrusion, and when the rubber plug blocks the air inlet hole, the second protrusion is in line contact with the rubber plug. The line contact between the first protrusion of the rubber plug and the metal core can be understood as that all the contact points between the first protrusion and the metal core form a line, rather than a surface, and the line can be a curve, a straight line or a plurality of straight lines, etc. The first protrusion can be in the shape of a circular ring or a square ring, etc. It can be understood that, compared with surface contact, the line contact has a small contact area, the line contact makes the rubber plug more easily deformed, the pressure applied to the rubber plug is small, the magnetic force required by the partition plate is small, and this is beneficial to reducing the power consumption of the air valve. The line contact is more easily to tightly block the air inlet hole than the surface contact. The line contact between the second protrusion of the metal core and the rubber plug can refer to the line contact between the first protrusion of the rubber plug and the metal core, and will not be described herein again.

[0015] In a possible implementation, the air valve includes a rubber column located in the air inlet hole of the metal core, and the movable element includes a main body part and a blocking part, the magnetic responsive elastomer is located between the main body part and the metal core, and the blocking part protrudes from the main body part and is used to contact the rubber column and block the air inlet hole. The rubber column can be made of a soft material, for example, silica gel or rubber, etc. The movable element can be made of a hard and magnetically conductive material. The movable element and the rubber column are easy to realize tightly blocking the air inlet hole. The rubber column is made of a soft material, and the main body part and the blocking part can be made of the same material, and the manufacturing process is simple.

[0016] In a possible implementation, the movable element is an integrally formed structure. The movable element is an integrally formed structure, and the main body part and the blocking part can be integrally formed by stamping or the like, and the process is simple and the cost is low.

[0017] In one possible embodiment, the rubber column is provided with a third protrusion, and when the sealing portion seals the air inlet, the third protrusion and the sealing portion are in line contact. Alternatively, the sealing portion is provided with a fourth protrusion, and when the sealing portion seals the air inlet, the fourth protrusion and the rubber column are in line contact. Line contact between the third protrusion of the rubber column and the sealing portion can be understood as meaning that all contact points between the third protrusion and the sealing portion form a line, rather than a surface. This line can be a curve, a straight line, or multiple straight lines. The third protrusion can be in the shape of a circular ring or a square ring. It can be understood that line contact between the third protrusion and the sealing portion is smaller than surface contact, resulting in a smaller contact area. This makes the rubber column more easily deformable, requires less pressure on the rubber column, and reduces the magnetic force on the partition. The smaller magnetic force required helps reduce the power consumption of the air valve. Line contact is more likely to tightly seal the air inlet than surface contact. The line contact between the fourth protrusion of the blocking portion and the glue column refers to the line contact between the third protrusion of the glue column and the blocking portion, which will not be repeated here.

[0018] In a second aspect, the present application provides an electronic device, comprising an airbag and the air valve described in any one of the aforementioned embodiments, wherein the air inlet of the air valve is connected to the air hole of the airbag.

[0019] The embodiment of the present application provides a magnetically responsive elastomer, which is beneficial to the miniaturization of the air valve and increases the initial magnetic force on the movable part, thereby reducing the risk that the movable part cannot be sucked down in the initial state and thus cannot block the air inlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the background technology, the drawings required for use in the embodiments of the present application or the background technology will be described below.

[0021] Figure 1 This is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

[0022] Figure 2 This is a structural schematic diagram of a gas valve in a ventilation state provided by an embodiment of the present application;

[0023] Figure 3 yes Figure 2 The structure diagram of the air valve shown is in the air blocking state;

[0024] Figure 4 This is a schematic structural diagram of a first magnetically responsive elastomer provided in an embodiment of the present application that is not magnetized;

[0025] Figure 5 yes Figure 4 A schematic diagram of the structure of the first magnetically responsive elastomer after being magnetized is shown;

[0026] Figure 6is a partial structure schematic diagram of a gas valve provided by an embodiment of the present application;

[0027] Figure 7 is a structure schematic diagram of another gas valve in a ventilation state provided by an embodiment of the present application;

[0028] Figure 8 is Figure 7 a structure schematic diagram of the gas valve in a blocking state shown in FIG. 4;

[0029] Figure 9 is a structure schematic diagram of another gas valve in a ventilation state provided by an embodiment of the present application;

[0030] Figure 10 is Figure 9 a structure schematic diagram of the gas valve in a blocking state shown in FIG. 6. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0032] It should be understood that the terms "first", "second", etc. used in the present application are only for the purpose of distinguishing the description, and cannot be understood as indicating or implying relative importance, nor can it be understood as indicating or implying sequence.

[0033] In the description of the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or abutting connection or integral connection; for those of ordinary skill in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0035] As Figure 1 shown, Figure 1The electronic device 100 is a schematic diagram of the structure of the electronic device 100. The electronic device 100 may be an electronic blood pressure monitor, or other devices that require an air valve, which is not limited by the embodiment of the present application. The electronic device 100 may include an air valve 10 and an air bag 20. The air inlet 124 of the air valve 10 (see Figure 2 ) is connected to the air hole of the air bag 20, and the air outlet hole 111 of the air valve 10 (see Figure 2 ) is connected to the external environment.

[0036] In some embodiments, the electronic device 100 may further include an air pump 30, a microcontroller unit 40, and a differential pressure gauge 50. The air pump 30, differential pressure gauge 50, and air valve 10 may be mounted on a bracket and connected to the airbag 20. The microcontroller unit 40 may control the air pump 30 to inflate. During inflation, the microcontroller unit 40 controls the air valve 10 to close, allowing the air pump 30 to inflate the airbag 20. The microcontroller unit 40 may control the differential pressure gauge 50 to sense the internal pressure of the airbag 20. After the airbag 20 is inflated, it compresses the blood vessels to measure blood pressure. After the blood pressure measurement is completed, the microcontroller unit 40 controls the air pump 30 to stop inflating and controls the air valve 10 to open, deflating the airbag 20. The gas within the airbag 20 escapes through the air vents of the airbag 20, the air inlet 124 of the air valve 10, and the air outlet 111 of the air valve 10 to the external environment.

[0037] Figure 1 The electronic device 100 is only schematically shown, and the size, shape, structure, etc. of the electronic device 100 can be set as needed. The embodiment of the present application does not limit the specific structure of the electronic device 100.

[0038] like Figure 2 and Figure 3 As shown, Figure 2 This is a structural diagram of the air valve 10 in the ventilation state. Figure 3 yes Figure 2 The gas valve 10 is a schematic structural diagram of a gas-blocking state. The gas valve 10 may include a housing 11, a metal core 12, a coil 13, a movable part 14, and a magnetically responsive elastic body.

[0039] The embodiment of the present application is described by taking as an example the number of magnetically responsive elastomers as two, namely the first magnetically responsive elastomer 153 and the second magnetically responsive elastomer 154. In other embodiments, the air valve 10 may include one magnetically responsive elastomer. For example, the air valve 10 may include the first magnetically responsive elastomer 153 but not the second magnetically responsive elastomer 154, or the air valve 10 may include the second magnetically responsive elastomer 154 but not the first magnetically responsive elastomer 153. The embodiment of the present application does not limit the number of magnetically responsive elastomers, and the number of magnetically responsive elastomers may also be three or four, etc.

[0040] In some embodiments, the metal core 12 may be partially located in the housing 11 or may be entirely located in the housing 11. Figure 2 The metal core 12 may include a first core 121 and a second core 122 that are spaced apart, and the first core 121 may surround the second core 122. The metal core 12 may also include a connecting portion 123, and the connecting portion 123 connects the first core 121 and the second core 122. The first core 121, the second core 122 and the connecting portion 123 may be an integrated structure. Part of the structure of the metal core 12 (the first core 121 and the second core 122) is located in the shell 11, and the other part of the structure of the metal core 12 (the connecting portion 123) is jointly enclosed with the shell 11 to form a cavity. The coil 13, the movable part 14, the first magnetically responsive elastomer 153 and the second magnetically responsive elastomer 154 are all located in the cavity. The shell 11 and the connecting portion 123 can be fixedly connected by dispensing, ultrasonic welding or laser welding. The shell 11 may be made of plastic or other materials. The shell 11 made of plastic is light in weight and low in cost. The metal core 12 may be made of a material with high magnetic permeability such as iron, ferrite or steel.

[0041] In other embodiments, the metal core 12 may be entirely located within the shell 11 , and the shell 11 may be provided with holes corresponding to the air inlet holes 124 of the metal core 12 , so that gas can enter the air inlet holes 124 .

[0042] The housing 11 is provided with an air outlet 111, and the metal core 12 is provided with an air inlet 124. The air inlet 124 is spaced apart from the air outlet 111. The air inlet 124 extends through the second core 122. The movable member 14 is positioned between the air outlet 111 and the air inlet 124. The movable member 14 can be positioned close to the air inlet 124 to block the air inlet 124, thereby disconnecting the air inlet 124 from the air outlet 111. Alternatively, the movable member 14 can be positioned away from the air inlet 124 to connect the air inlet 124 with the air outlet 111.

[0043] In the embodiment of the present application, the air inlet 124 and the air outlet 111 are arranged opposite to each other. In other embodiments, the air inlet 124 can also be arranged in a staggered manner with the air outlet 111, which is not limited in the embodiment of the present application.

[0044] In some embodiments, the coil 13 can be wound around the metal core 12. For example, the coil 13 can be located between the first core 121 and the second core 122 and wound around the second core 122. The coil 13 can also be wound around other positions of the metal core 12. The coil 13 can be made of copper or other conductive materials. When the coil 13 is energized, a magnetic field is generated, and the coil 13 can cause the metal core 12, the first magnetically responsive elastomer 153, and the second magnetically responsive elastomer 154 to generate magnetic force.

[0045] In the embodiment of the present application, the arrangement direction of the metal core 12 and the movable member 14 is taken as the second direction A2 , and the first direction A1 is perpendicular to the second direction A2 .

[0046] The magnetically responsive elastomer (the first magnetically responsive elastomer 153 and the second magnetically responsive elastomer 154) is located between the movable part 14 and the metal core 12. The movable part 14 needs to move back and forth along the second direction A2 to block the air inlet 124 or release the blockage of the air inlet 124. There is a gap between the movable part 14 and the metal core 12 so that the movable part 14 can move back and forth along the second direction A2, and the magnetically responsive elastomer is located in the gap between the movable part 14 and the metal core 12. The magnetically responsive elastomer can be fixed to the movable part 14 and in contact with the metal core 12, and the magnetically responsive elastomer can be used to support the movable part 14, or the magnetically responsive elastomer can be fixed to the metal core 12 and in contact with the movable part 14, and the magnetically responsive elastomer can be used to support the movable part 14, or one side of the magnetically responsive elastomer is fixed to the movable part 14 and the other side of the magnetically responsive elastomer is fixed to the metal core 12. The fixing position of the magnetically responsive elastomer in the embodiment of the present application is flexible and the fixing method is simple. The first magnetically responsive elastic body 153 can be fixed to the movable member 14 or to the first core 121 by gluing or other methods, and the second magnetically responsive elastic body 154 can be fixed to the movable member 14 or to the second core 122 by gluing or other methods. When the coil 13 is energized, the coil 13 generates a magnetic field, which can cause the magnetically responsive elastic body to generate magnetic force and deform the magnetically responsive elastic body.

[0047] It can be understood that the coil 13 can be connected to a power supply through a flexible circuit board or other electrical connector, and the power supply supplies power to the coil 13 so that the coil 13 can be energized and generate a magnetic field to magnetize the metal core 12, the first magnetically responsive elastomer 153 and the second magnetically responsive elastomer 154.

[0048] like Figure 4 and Figure 5 As shown, Figure 4 is a schematic diagram of a structure in which the first magnetically responsive elastic body 153 is not magnetized. Figure 5 yes Figure 4 The schematic structural diagram of the first magnetically responsive elastic body 153 after being magnetized is shown in FIG. Figure 5 The dotted line with an arrow in it represents the magnetic field. As you can understand, Figure 5 The magnetic field in the figure is only a schematic representation, and the embodiment of the present application does not limit the direction, size, etc. of the magnetic field.

[0049] The first magnetic responsive elastomer 153 can include an elastic matrix 151 and soft magnetic particles 152. The elastic matrix 151 can be a high polymer such as silicone rubber, and the soft magnetic particles 152 can be ferrite, and the soft magnetic particles 152 are distributed in the elastic matrix 151. After the soft magnetic particles 152 are magnetized by a magnetic field, they can attract each other. In the process of attracting each other, the soft magnetic particles 152 compress the elastic matrix 151, and the elastic matrix 151 deforms. After the soft magnetic particles 152 are magnetized by an external magnetic field (such as a magnetic field generated after the coil 13 is powered on), the soft magnetic particles 152 attract each other and compress the elastic matrix 151. It can also be understood that the first magnetic responsive elastomer 153 is compressed under the action of the magnetic field. It can be understood that when the magnetic field is generated, the first magnetic responsive elastomer 153 deforms and its size becomes smaller. After the magnetic field disappears, the first magnetic responsive elastomer 153 restores the deformation and its size becomes larger. It can be understood that the first magnetic responsive elastomer 153 does not need other forces to compress it, and it can deform when subjected to a magnetic force.

[0050] Figure 4 And Figure 5 Taking the first magnetic responsive elastomer 153 as an example, the second magnetic responsive elastomer 154 can also include an elastic matrix 151 and soft magnetic particles 152. For details, refer to the first magnetic responsive elastomer 153, which will not be described here. It can be understood that the materials of the elastic matrix of the first magnetic responsive elastomer 153 and the elastic matrix of the second magnetic responsive elastomer 154 can be the same or different, and the materials of the soft magnetic particles of the first magnetic responsive elastomer 153 and the soft magnetic particles of the second magnetic responsive elastomer 154 can be the same or different.

[0051] Referring to Figure 3 When the coil 13 is powered on, the coil 13 generates a magnetic field, and the coil 13 causes the metal core 12 and the magnetic responsive elastomer (the first magnetic responsive elastomer 153 and the second magnetic responsive elastomer 154) to generate a magnetic force, and the magnetic responsive elastomer deforms and is compressed. Under the action of the magnetic force of the metal core 12 and the magnetic responsive elastomer, the movable part 14 approaches and blocks the air inlet hole 124, that is, the movable part 14 moves downward along the second direction A2, the air inlet hole 124 is disconnected from the air outlet hole 111, and the gas cannot pass through the air inlet hole 124, that is, the movable part 14 is attracted downward by the magnetic force. Referring to Figure 2 When the coil 13 is powered off, the magnetic field generated by the coil 13 disappears, the magnetic responsive elastomer restores the deformation and becomes larger in size, and the movable part 14 is subjected to an upward force from the magnetic responsive elastomer during the restoration of the deformation of the magnetic responsive elastomer. The movable part 14 moves upward along the second direction A2, and the movable part 14 moves away from the air inlet hole 124. The air inlet hole 124 is connected to the air outlet hole 111, and the gas can flow from the air inlet hole 124 to the air outlet hole 111. The magnetic responsive elastomer is used to support the movable part 14, so that the movable part 14 maintains a state of moving away from the air inlet hole 124.

[0052] The gap between the metal core 12 and the movable element 14 is utilized to set the magnetic responsive elastic body in the gap between the metal core 12 and the movable element 14, which is beneficial to the miniaturization of the air valve 10. The gap between the metal core 12 and the movable element 14 is usually small, and the magnetic responsive elastic body with small size is easy to manufacture, and the magnetic responsive elastic body does not need to increase the gap between the metal core 12 and the movable element 14, and the magnetic responsive elastic body is between the metal core 12 and the movable element 14, which does not increase the size of the air valve 10 in the first direction A1, and is beneficial to the miniaturization of the air valve 10.

[0053] In the embodiment of the present application, when the coil 13 is energized, the movable element 14 is attracted to the metal core 12 and the magnetic responsive elastic body to close the air inlet hole 124. Compared with the design of only setting the metal core 12, the magnetic force of the magnetic responsive elastic body on the movable element 14 is increased, which is beneficial to increase the power of the movable element 14 moving towards the air inlet hole 124. In addition, the magnetic responsive elastic body is located in the gap between the metal core 12 and the movable element 14, and the magnetic responsive elastic body replaces part of the air in the gap between the metal core 12 and the movable element 14. The magnetic permeability of air is low, and the magnetic permeability of the magnetic responsive elastic body is higher than that of air. The initial magnetic force of the metal core 12 and the magnetic responsive elastic body on the movable element 14 is increased, and the risk that the movable element 14 cannot be attracted down in the initial state (the initial state can be understood as the moment when the coil 13 is energized, and the movable element 14 is about to be attracted down to close the air inlet hole 124 by the magnetic force) to close the air inlet hole 124 is reduced.

[0054] The magnetic responsive elastic body in the embodiment of the present application is provided as two, which can increase the magnetic force of the magnetic responsive elastic body on the movable element 14. In addition, the magnetic responsive elastic body provided as two can occupy more space between the metal core 12 and the movable element 14, reduce the air in the gap between the metal core 12 and the movable element 14, increase the initial magnetic force of the metal core 12 and the magnetic responsive elastic body on the movable element 14, and reduce the risk that the movable element 14 cannot be attracted down in the initial state to close the air inlet hole 124.

[0055] Referring to Figure 2 and Figure 3 , the movable element 14 can include a fixedly connected partition plate 141 and a rubber plug 142. The partition plate 141 can be a circular thin plate, and the partition plate 141 can be a soft magnetic material capable of conducting magnetism, and the partition plate 141 can be attracted by the magnetic force of the metal core 12 and the magnetic responsive elastic body. The partition plate 141 can also be square or other shapes, and the shape, size, etc. of the partition plate 141 are not limited in the embodiment of the present application.

[0056] The rubber plug 142 is arranged on the partition plate 141 and is opposite to the air inlet hole 124, and is used to block the air inlet hole 124. The partition plate 141 can be provided with a mounting hole, and the rubber plug 142 is arranged in the mounting hole and is fixedly connected with the partition plate 141, or the partition plate 141 can not be provided with the mounting hole, and the rubber plug 142 can be fixed to the surface of the partition plate 141 by means of gluing or the like. The rubber plug 142 is made of elastic material, such as silica gel or the like, and the rubber plug 142 can be compressed to block the air inlet hole 124.

[0057] Referring to Figure 2 and Figure 3 , the second core 122 can include a fixedly connected air inlet portion 126 and a contact portion 127, the air inlet hole 124 penetrates through the air inlet portion 126, and the contact portion 127 can be provided with a groove 125. The groove 125 is in communication with the air inlet hole 124. Part of the structure of the rubber plug 142 can be arranged in the groove 125, which is beneficial to reduce the size of the air valve 10 in the second direction A2, and to realize miniaturization of the air valve 10. In addition, the groove 125 can limit the rubber plug 142, and prevent the movable part 14 from moving in the first direction A1 during movement in the second direction A2, so as to improve the stability of the structure of the air valve 10 and effectively block the air inlet hole 124.

[0058] The first magnetic response elastic body 153 is arranged between the first core 121 and the partition plate 141 of the movable part 14, and the second magnetic response elastic body 154 is arranged between the contact portion 127 of the second core 122 and the partition plate 141 of the movable part 14.

[0059] In other embodiments, the second core 122 can not be provided with the groove 125, and the specific structure of the second core 122 is not limited in the embodiments of the present application, and can be designed according to needs.

[0060] Referring to Figure 2 and Figure 6 , Figure 6Fig. 1 is a schematic diagram of a partial structure of a gas valve 10. The size W1 of the first magnetically responsive elastomer 153 in the first direction A1 is greater than or equal to the size L1 of the first core 121 in the first direction A1. In the embodiment of the present application, by setting the size W1 of the first magnetically responsive elastomer 153 in the first direction A1 to be greater than the size L1 of the first core 121 in the first direction A1, it is beneficial to prevent the active element 14 from being misaligned with the metal core 12 in the first direction A1 during movement of the active element 14 in the second direction A2, so that the magnetically responsive elastomer is misaligned with the metal core 12, the magnetically responsive elastomer cannot contact the metal core 12, and the magnetically responsive elastomer cannot support the active element 14. When the size W1 of the first magnetically responsive elastomer 153 in the first direction A1 is greater than the size L1 of the first core 121 in the first direction A1, even if the active element 14 is offset in the first direction A1, the magnetically responsive elastomer can still contact the metal core 12, the magnetically responsive elastomer can support the active element 14, and it is beneficial to improve the functional reliability of the gas valve 10.

[0061] In other embodiments, the size W1 of the first magnetically responsive elastomer 153 in the first direction A1 can be less than or equal to the size L1 of the first core 121 in the first direction A1.

[0062] The size W2 of the second magnetically responsive elastomer 154 in the first direction A1 is greater than the size L2 of the contact portion 127 of the second core 122 in the first direction A1. In the embodiment of the present application, by setting the size W2 of the second magnetically responsive elastomer 154 in the first direction A1 to be greater than the size L2 of the contact portion 127 of the second core 122 in the first direction A1, it is beneficial to prevent the active element 14 from being misaligned with the metal core 12 in the first direction A1 during movement of the active element 14 in the second direction A2, so that the magnetically responsive elastomer is misaligned with the metal core 12, the magnetically responsive elastomer cannot contact the metal core 12, and the magnetically responsive elastomer cannot support the active element 14. When the size W2 of the second magnetically responsive elastomer 154 in the first direction A1 is greater than the size L2 of the contact portion 127 of the second core 122 in the first direction A1, even if the active element 14 is offset in the first direction A1, the magnetically responsive elastomer can still contact the metal core 12, the magnetically responsive elastomer can support the active element 14, and it is beneficial to improve the functional reliability of the gas valve 10.

[0063] In other embodiments, the size W2 of the second magnetically responsive elastomer 154 in the first direction A1 can be less than or equal to the size L2 of the contact portion 127 of the second core 122 in the first direction A1.

[0064] Referring to Figure 2 and Figure 6The partition 141 of the movable element 14 can be provided with a through hole 143. The partition 141 can include a first region 1411 outside the region surrounded by the second magnetically responsive elastomer 154 on the movable element 14 and a second region 1412 inside the region surrounded by the second magnetically responsive elastomer 154 on the movable element 14. The through hole 143 can be arranged in the first region 1411. The number of the through hole 143 can be one, two, three, four, etc. The number of the through hole 143 is not limited in the embodiments of the present application, Figure 6 For example, the number of the through hole 143 is three in the embodiments of the present application.

[0065] In other embodiments, the second region 1412 can also be provided with a through hole 143. The through hole 143 of the partition 141 is used for gas flow. The gas passing through the gas inlet hole 124 can flow to the gas outlet hole 111 through the through hole 143.

[0066] It can be understood that the through hole 143 arranged on the partition 141 can avoid the partition 141 from shielding the gas inlet hole 124 and the gas outlet hole 111, so as to ensure that the gas inlet hole 124 and the gas outlet hole 111 can be connected when the movable element 14 is away from the gas inlet hole 124.

[0067] The second magnetically responsive elastomer 154 can include a first part 155 and a second part 156, and a gap 157 is arranged between the first part 155 and the second part 156. When the movable element 14 is away from the gas inlet hole 124, the gas inlet hole 124 and the gas outlet hole 111 are connected through the gap 157 and the through hole 143. The gas passes through the gas inlet hole 124, the groove 125, the gap 157, the through hole 143 and the gas outlet hole 111 in sequence. It can be understood that the gap 157 arranged between the first part 155 and the second part 156 of the second magnetically responsive elastomer 154 can avoid the second magnetically responsive elastomer 154 from shielding the gas inlet hole 124 and the gas outlet hole 111, so as to ensure that the gas inlet hole 124 and the gas outlet hole 111 can be connected when the movable element 14 is away from the gas inlet hole 124.

[0068] In other embodiments, the second magnetically responsive elastomer 154 can also include a third part 158, a fourth part or a fifth part, etc. The number of the parts of the second magnetically responsive elastomer 154 is not limited in the embodiments of the present application, and can be arranged as needed. The size of the gap 157 is not limited in the embodiments of the present application, and can be arranged as needed.

[0069] The gap 157 is arranged to divide the second magnetically responsive elastomer 154 into at least two parts in the embodiments of the present application, which is used for gas flow. The gas passing through the gas inlet hole 124 can flow to the gas outlet hole 111 through the gap 157 and the through hole 143.

[0070] Referring to Figure 6In some embodiments, the through hole 143 is arranged corresponding to the gap 157, so that the distance between the through hole 143 and the gap 157 is close, and the gas passing through the gap 157 can pass through the through hole 143 in time to flow to the gas outlet hole 111, which is beneficial to increase the inflation rate. When the through hole 143 is not arranged corresponding to the gap 157, the distance between the through hole 143 and the gap 157 is far, which is not conducive to the timely flow of the gas to the gas outlet hole 111. Corresponding arrangement of the through hole 143 and the gap 157 can be understood as that the through hole 143 and the gap 157 are not blocked by the second magnetically responsive elastomer 154.

[0071] In some embodiments, the gap 157 can be provided with a through hole 143, and the gas passing through the gas inlet hole 124 can flow to the gas outlet hole 111 through the through hole 143. In other words, the through hole can be arranged between the first part 155 and the second part 156.

[0072] Referring to Figure 2 and Figure 3 The side of the rubber plug 142 facing the gas inlet hole 124 is provided with a first protrusion 1421. When the rubber plug 142 blocks the gas inlet hole 124, the first protrusion 1421 is in line contact with the metal core 12, preventing the gas from flowing. For example, when the rubber plug 142 blocks the gas inlet hole 124, the first protrusion 1421 is in line contact with the bottom wall of the groove 125. The line contact between the first protrusion 1421 and the metal core 12 can be understood as that all contact points between the first protrusion 1421 and the metal core 12 are connected to form a line, rather than a surface. The line can be a curve, a straight line, or a plurality of straight lines, etc. The first protrusion 1421 can be a circular ring or a square ring, etc.

[0073] The rubber plug 142 moves along the second direction A2 under the action of the partition plate 141. During the process of the rubber plug 142 approaching the gas inlet hole 124, the first protrusion 1421 is in line contact with the bottom wall of the groove 125 of the metal core 12, and the gas cannot enter the groove 125.

[0074] It can be understood that when the rubber plug 142 is in surface contact with the metal core 12, a large magnetic force is needed to compress the rubber plug 142 to block the gas inlet hole 124, thereby increasing the power consumption of the gas valve 10. In the embodiments of the present application, the first protrusion 1421 is in line contact with the metal core 12, and compared with surface contact, the contact area of line contact is small. The line contact makes the rubber plug 142 more easily deformed, and the pressure required to be applied to the rubber plug 142 is small, and the magnetic force required to be received by the partition plate 141 is small. The small magnetic force is beneficial to reduce the power consumption of the gas valve 10. The line contact is more easily to tightly block the gas inlet hole 124 than the surface contact.

[0075] In other embodiments, the metal core 12 is provided with a second protrusion on the side facing the rubber plug 142. When the rubber plug 142 blocks the gas inlet hole 124, the second protrusion and the rubber plug 142 form a line contact, which prevents the gas from flowing. Compared with the surface contact, the line contact has a smaller contact area, and the line contact makes the rubber plug 142 more easily deformed, so that the pressure applied to the rubber plug 142 is smaller, and the magnetic force required by the baffle 141 is smaller. The smaller magnetic force is conducive to reducing the power consumption of the gas valve 10. The line contact is more likely to tightly block the gas inlet hole 124 than the surface contact.

[0076] In combination with the embodiments shown in Figure 2 and Figure 3 , Figure 7 and Figure 8 , Figure 7 is another structural schematic view of the gas valve 10 in the gas passing state, Figure 8 is a structural schematic view of the gas valve 10 in the gas blocking state. Figure 7

[0077] In some embodiments, the gas valve 10 can include a rubber column 16 located in the gas inlet hole 124 of the metal core 12. For example, the rubber column 16 is located in the second core 122, and the rubber column 16 can be fixed in the gas inlet hole 124 of the second core 122 by injection molding. The rubber column 16 is provided with a through hole, and the through hole of the rubber column 16 overlaps part of the gas inlet hole 124 of the second core 122, which is used for gas to enter.

[0078] The movable part 14 can include a main body part 144 and a blocking part 145. The magnetically responsive elastomer is located between the main body part 144 and the metal core 12. For example, the first magnetically responsive elastomer 153 is located between the main body part 144 and the first core 121, and the second magnetically responsive elastomer 154 is located between the main body part 144 and the second core 122. The blocking part 145 protrudes from the main body part 144, and the blocking part 145 is used to contact the rubber column 16 and block the gas inlet hole 124.

[0079] The rubber column 16 can be made of soft material, such as silicone or rubber. The movable part 14 can be made of hard and magnetically conductive material. The movable part 14 and the rubber column 16 cooperate to easily achieve airtight sealing of the gas inlet hole 124.

[0080] The movable part 14 can be an integral structure, and the main body part 144 and the blocking part 145 can be integrally formed by stamping or other processes. The process is simple, the processing difficulty is low, the production yield is high, and the cost is low.

[0081] ​In the embodiment of the present application, when the coil 13 is powered, the coil 13 generates a magnetic field, so that the metal core body 12 and the magnetic responsive elastomer both generate magnetic force, the magnetic responsive elastomer is deformed and compressed, the movable part 14 is close to and blocks the air inlet hole 124 under the magnetic force of the metal core body 12 and the magnetic responsive elastomer, and the blocking part 145 blocks the air inlet hole 124. When the coil 13 is powered off, the magnetic field generated by the coil 13 disappears, the magnetic responsive elastomer restores the deformation and becomes larger in size, the movable part 14 is subjected to the upward force of the magnetic responsive elastomer in the process of restoring the deformation of the magnetic responsive elastomer, and the movable part 14 moves upward along the second direction A2, the blocking part 145 is away from the air inlet hole 124, the air inlet hole 124 is communicated with the air outlet hole 111, the gas can pass from the air inlet hole 124 to the air outlet hole 111, and the magnetic responsive elastomer is used for supporting the movable part 14.

[0082] In combination with the embodiments shown in Figure 7 and Figure 8 , reference can be made to Figure 9 and Figure 10 , Figure 9 is another structural schematic view of the air valve 10 in the air passage state, Figure 10 is Figure 9 Figure 10 a structural schematic view of the air valve 10 in the air blocking state.

[0083] In some embodiments, the rubber column 16 can be provided with a third protrusion 161, and when the blocking part 145 blocks the air inlet hole 124, the third protrusion 161 is in line contact with the blocking part 145. The line contact between the third protrusion 161 and the blocking part 145 can be understood as that all the contact points between the third protrusion 161 and the blocking part 145 form a line, instead of a surface, and the line can be a curve, a straight line or a plurality of straight lines, etc. The third protrusion 161 can be a circular ring or a square ring, etc. It can be understood that the line contact between the third protrusion 161 and the blocking part 145 has a smaller contact area than the surface contact, the line contact makes the rubber column 16 more easily deformed, the pressure applied to the rubber column 16 is smaller, the magnetic force required by the partition plate 141 is smaller, and the smaller magnetic force is conducive to reducing the power consumption of the air valve 10. The line contact is more easily to tightly block the air inlet hole 124 than the surface contact.

[0084] In other embodiments, the blocking part 145 can be provided with a fourth protrusion, and when the blocking part 145 blocks the air inlet hole 124, the fourth protrusion is in line contact with the rubber column 16. The line contact between the fourth protrusion of the blocking part and the rubber column can refer to the line contact between the third protrusion 161 of the rubber column 16 and the blocking part 145, which will not be described here.

[0085] The embodiment of the present application sets the magnetic response elastic body between the metal core 12 and the movable element 14, fully utilizes the gap between the metal core 12 and the movable element 14, does not increase the size of the air valve 10, and is conducive to the miniaturization of the air valve 10. In addition, the movable element 14 can be subjected to the magnetic force of the magnetic response elastic body, the magnetic response elastic body discharges part of the air between the metal core 12 and the movable element 14, and the magnetic permeability of the magnetic response elastic body is greater than that of the air, which increases the initial magnetic force of the metal core 12 and the magnetic response elastic body on the movable element 14, and reduces the risk that the movable element 14 cannot be sucked in the initial state to cause the air inlet hole 124 to be unable to be blocked. By setting the line contact between the movable element 14 and the metal core 12 or the line contact between the movable element 14 and the rubber column 16, the power consumption of the air valve 10 is reduced. By setting the movable element 14 (the main body part 144 and the blocking part 145) as an integrated structure, the manufacturing process is simplified, the process difficulty is reduced, and the cost is reduced.

[0086] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A gas valve characterized by, The valve comprises a shell, a metal core, a coil, a movable element and a magnetic responsive elastomer. The shell is provided with an air outlet. The metal core is provided with an air inlet, the metal core is at least partially located in the shell, the air inlet is arranged in a spaced manner with the air outlet, and the coil is arranged around the metal core. The movable element is located between the air outlet and the air inlet. The magnetic responsive elastomer is located between the movable element and the metal core. When the coil is powered, the metal core and the magnetic responsive elastomer can generate magnetic force, the magnetic responsive elastomer is deformed, the movable element is close to and blocks the air inlet under the action of the magnetic force, and the air inlet is disconnected with the air outlet; when the coil is powered off, the magnetic responsive elastomer restores the deformation, the movable element is away from the air inlet, and the air inlet is communicated with the air outlet.

2. The gas valve of claim 1, wherein The magnetic responsive elastomer comprises an elastic base and soft magnetic particles, and the soft magnetic particles are distributed in the elastic base.

3. The gas valve of claim 1 or 2, wherein The magnetic responsive elastomer is fixed to the movable element, or the magnetic responsive elastomer is fixed to the metal core.

4. The gas valve according to any one of claims 1 to 3, wherein The number of the magnetic responsive elastomers is two, and the two magnetic responsive elastomers are respectively a first magnetic responsive elastomer and a second magnetic responsive elastomer. The metal core comprises a first core and a second core arranged in a spaced manner, the first core surrounds the second core, and the air inlet penetrates through the second core. The first magnetic responsive elastomer is located between the first core and the movable element, and the second magnetic responsive elastomer is located between the second core and the movable element.

5. The gas valve of claim 4, wherein The movable element is provided with a through hole, and the through hole is located outside the area surrounded by the second magnetic responsive elastomer on the movable element. The second magnetic responsive elastomer comprises a first part and a second part, and a gap is arranged between the first part and the second part. When the movable element is away from the air inlet, the air inlet and the air outlet are communicated through the gap and the through hole.

6. The gas valve of claim 5, wherein The through hole is arranged in correspondence with the gap.

7. A gas valve as claimed in any one of claims 4 to 6, wherein The size of the first magnetic responsive elastomer in a first direction is greater than the size of the first core in the first direction, and the first direction is perpendicular to the arrangement direction of the metal core and the movable element.

8. The gas valve of any one of claims 4-7, wherein, The size of the second magnetic responsive elastomer in a first direction is greater than the size of a contact part of the second core in the first direction, the contact part is used to contact the second magnetic responsive elastomer, and the first direction is perpendicular to the arrangement direction of the metal core and the movable element.

9. The gas valve of any one of claims 1-8, wherein, The movable element comprises a partition plate and a rubber plug fixedly connected, the magnetic responsive elastomer is located between the partition plate and the metal core, and the rubber plug protrudes from the partition plate. One side of the rubber plug facing the air inlet is provided with a first protrusion, and when the rubber plug blocks the air inlet, the first protrusion is in line contact with the metal core, or one side of the metal core facing the rubber plug is provided with a second protrusion, and when the rubber plug blocks the air inlet, the second protrusion is in line contact with the rubber plug.

10. The gas valve of any one of claims 1-8, wherein, The valve comprises a rubber column, and the rubber column is located in the air inlet of the metal core. The movable element comprises a main body and a blocking part, the magnetic response elastomer is located between the main body and the metal core, and the blocking part protrudes from the main body and is used for contacting the rubber column and blocking the air inlet hole.

11. The gas valve of claim 10, wherein The movable element is an integrally formed structure.

12. The gas valve according to claim 10 or 11, characterized in that: The rubber column is provided with a third protrusion, and when the blocking part blocks the air inlet hole, the third protrusion is in linear contact with the blocking part, or the blocking part is provided with a fourth protrusion, and when the blocking part blocks the air inlet hole, the fourth protrusion is in linear contact with the rubber column.

13. An electronic device, comprising: The air valve according to any one of claims 1-12 is used in an air bag.

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