Air pumps, combined air pumps, electronic blood pressure monitors and medical devices

Abstract

The present application discloses an air pump, a combined air pump, an electronic sphygmomanometer and a medical device. The air pump includes a first component, a second component and a driving device. The second component is arranged opposite to the first component. The driving device drives at least one of the first component and the second component so that the first component and the second component can complete the action of alternating relative distance and relative proximity. The first component and the second component form a sealed cavity when they are away from each other. The cavity wall of the sealed cavity is provided with a first airway for communicating with the external space and a second airway for communicating with the gas storage cavity. After the first component and the second component complete the action of relative distance and relative proximity, the gas enters the gas storage cavity from the second airway. By repeating this process, the gas storage cavity can be inflated.

Description

Technical Field

[0001] The present application relates to an air pump, in particular to an air pump that can be applied to an electronic sphygmomanometer. Background Art

[0002] With the development and application of the wearable concept in the field of medical devices, products are required to be small in size and have long battery life. For example, the requirement for a watch-type electronic blood pressure monitor is to be the size of a real ordinary watch, rather than reluctantly calling a wrist-type electronic blood pressure monitor a watch-type electronic blood pressure monitor. This requires: the size of the components used must be as small as possible, the power consumption must be as low as possible, and the battery used must be as large as possible. At present, the air pumps used in electronic blood pressure monitors can be roughly divided into two types. One is an air pump driven by a micro motor. Although the power consumption can be about 0.2-0.3W, the disadvantage is that the size is too large. The current smallest air pump size is roughly 12mm*6mm*28mm. If it is used in a watch-type electronic blood pressure monitor, this air pump will occupy the space of a normal lithium battery, making the capacity of the lithium battery far lower than the capacity of an ordinary smart watch lithium battery; the other is a piezoelectric pump. Although the piezoelectric pump has a relatively large advantage in thickness, its disadvantages are also obvious and unbearable: its plane size mostly exceeds 25mm*25mm, and the more fatal disadvantage is that the power is generally above 1W, and the lithium battery of an ordinary smart watch (roughly 280mAH) itself has a big problem with battery life. Adding an air pump with a power consumption of more than 1W makes it even more difficult to guarantee its battery life. Summary of the invention

[0003] The present application provides a new type of air pump and a combined air pump, and also provides a sphygmomanometer and a medical device using the air pump or the combined air pump.

[0004] According to one aspect of the present application, an air pump is provided in one embodiment, comprising:

[0005] first component;

[0006] a second component, the second component being arranged opposite to the first component;

[0007] and a driving device, wherein the driving device drives at least one of the first component and the second component so that the first component and the second component can perform an action of relatively moving away and relatively approaching each other alternately;

[0008] The first component and the second component have a connection structure that enables the two to form a sealed cavity when they are away from each other, and the cavity wall of the sealed cavity is provided with a first air channel for communicating with the external space and a second air channel for communicating with the gas storage cavity, the first air channel runs through the first component, and the opening of one end of the first air channel facing the second component is the first opening, and the opening of one end of the first air channel facing the external space is the second opening, the area of ​​one side of the second component facing the first opening is larger than the opening area of ​​the first opening, so that the orthographic projection of the first opening on the second component falls on the side facing the first opening;

[0009] The driving device drives the first component and the second component to repeatedly and alternately move away from and approach each other, so that the gas in the external space can enter the sealed cavity from the first gas channel and then enter the gas storage cavity.

[0010] As a further improvement of the air pump, the switching of the first component and the second component from moving away from each other to moving closer to each other is carried out when the air pressure in the sealed cavity is lower than the air pressure in the gas storage cavity, or at the moment when the air pressure in the sealed cavity reaches the air pressure in the gas storage cavity.

[0011] As a further improvement of the air pump, the switching of the first component and the second component from moving away from each other to moving closer to each other is carried out when the air pressure in the sealed cavity is lower than the air pressure in the external space, or at the moment when the air pressure in the sealed cavity reaches the air pressure in the external space.

[0012] As a further improvement of the air pump, an elastic member is provided between the first component and the second component for keeping the first component and the second component separated or close to each other.

[0013] As a further improvement of the air pump, the elastic member forms an integral structure with the first component or the second component.

[0014] As a further improvement of the air pump, the second component includes a flat plate body, and the elastic member surrounds the flat plate body and protrudes toward the side where the first component is located, so as to bounce the first component and the second component apart when the driving device stops working.

[0015] As a further improvement of the air pump, the first component includes a flat plate body, and the elastic member surrounds the flat plate body and protrudes toward the side where the second component is located, so as to bounce the first component and the second component apart when the driving device stops working.

[0016] As a further improvement of the air pump, the elastic member is a spring sheet arranged around the flat plate body, and one end of the spring sheet protrudes outward from the position of the flat plate body.

[0017] As a further improvement of the air pump, there are three or more spring pieces, and the spring pieces are distributed around the flat plate in a roughly circular manner and at equal angles.

[0018] As a further improvement of the air pump, the first component and the second component are in a state of being in close contact with each other as a starting point for the relatively moving away action.

[0019] As a further improvement of the air pump, the driving device outputs reciprocating linear motion, and the second component is driven by the driving device.

[0020] As a further improvement of the air pump, it includes a cavity structure, the cavity structure has a cavity, the first component is a part of the cavity structure, and the second component is installed in the cavity and arranged facing the first component.

[0021] As a further improvement of the air pump, when the second component moves away from the first component, the second component divides the cavity into the sealed cavity and the gas storage cavity, and the sealed cavity is connected to the gas storage cavity through a second air passage.

[0022] As a further improvement of the air pump, at least part of the cavity wall of the gas storage cavity is made of flexible or elastic material to form an air bag.

[0023] As a further improvement of the air pump, the gas storage chamber has a third air channel for conducting gas to other spaces.

[0024] As a further improvement of the air pump, it includes a cavity structure, the first component and the second component are respectively part of the cavity structure, and the second component is movably arranged facing the first component.

[0025] As a further improvement of the air pump, it includes a cavity structure, the cavity structure has a cavity, the first component is a part of the cavity structure, the second component is installed in the cavity and arranged facing the first component; the second component divides the cavity into an installation cavity, and the drive device is installed in the installation cavity.

[0026] As a further improvement of the air pump, the driving device outputs reciprocating linear motion, and the first component is driven by the driving device.

[0027] As a further improvement of the air pump, it further comprises a cavity structure, the second component is fixedly arranged in the cavity structure, and the first component and the second component are relatively and movably arranged in the cavity structure.

[0028] As a further improvement of the air pump, the first component is mounted on an elastic mounting seat, and the driving device drives the elastic mounting seat to partially deform, so as to make the first component and the second component move relative to each other to form the sealed cavity.

[0029] As a further improvement of the air pump, the driving device adopts a moving coil electromagnetic driving device, and the first component and / or the second component is driven by a moving coil of the moving coil electromagnetic driving device.

[0030] As a further improvement of the air pump, the driving device adopts a moving iron type electromagnetic driving device, and the first component and / or the second component is driven by the moving iron of the moving iron type electromagnetic driving device.

[0031] As a further improvement of the air pump, the driving device adopts an elastic member driving device that can be stretched or contracted by applying a voltage, a polymer driving device that can be stretched or contracted by applying a voltage, or a device that can be deformed by applying an electric field.

[0032] As a further improvement of the air pump, the driving device adopts an electrode combination structure that attracts each other after voltage is applied, and the first component and the second component move relatively closer and farther by applying and removing the voltage.

[0033] As a further improvement of the air pump, one of the first component and the second component is designed as a first electrode, and the other of the first component and the second component is an elastomeric structure, on which a second electrode is arranged.

[0034] As a further improvement of the air pump, one of the first component and the second component is designed as a first electrode, and the other of the first component and the second component is an elastomeric structure, on which a second electrode is arranged, and also includes a third electrode, and the second electrode and the elastomeric structure are arranged between the first electrode and the third electrode.

[0035] As a further improvement of the air pump, it also includes an air bag, which is connected to the second air channel and is used for inflating and deflating air in the air bag.

[0036] As a further improvement of the air pump, a silencer cavity is provided in the first air passage.

[0037] As a further improvement of the air pump, a silencer chamber is provided in the second air passage.

[0038] As a further improvement of the air pump, there are at least two first components; each of the first components is respectively provided with a corresponding second component, or at least two first components are used together for one second component; the second openings of the first airways on all the first components are independently provided or at least partially integrated together.

[0039] As a further improvement of the air pump, there are at least two second components; each of the second components is respectively provided with a corresponding first component, or at least two second components are used together for one first component; each of the second components is provided with a corresponding first opening of the first airway, and the second openings of the first airways on all the first components are independently provided or at least partially integrated together.

[0040] As a further improvement of the air pump, it also includes an air intake check valve, which is arranged corresponding to the first air channel to allow the first air channel to intake air into the sealed cavity in a unidirectional manner.

[0041] As a further improvement of the air pump, it also includes an exhaust one-way valve, which is arranged corresponding to the third air channel to allow the third air channel to exhaust air to other spaces in a one-way manner.

[0042] As a further improvement of the air pump, one side of the first component and one side of the second component facing each other are both smooth planes.

[0043] According to one aspect of the present application, an embodiment provides a combined air pump, comprising at least two air pumps as described in any one of the above items, all of which are connected in series in sequence.

[0044] According to one aspect of the present application, an embodiment provides a sphygmomanometer, which includes an air pump as described in any one of the above items, for inflating and deflation of air;

[0045] Or, include the combined air pump as described above, for inflating and deflation of air.

[0046] According to one aspect of the present application, an embodiment provides a medical device, which includes an air pump as described in any one of the above items, for inflating and defusing air;

[0047] Or, include the combined air pump as described above, for inflating and deflation of air.

[0048] The beneficial effects of this application are:

[0049] The air pump provided in this embodiment includes a first component, a second component and a driving device, wherein the second component is arranged relative to the first component, and the driving device drives at least one of the first component and the second component, so that the first component and the second component can complete the action of alternating relative distance and relative proximity. The first component and the second component form a sealed cavity when they are far away from each other, and the cavity wall of the sealed cavity is provided with a first air channel for communicating with the external space and a second air channel for communicating with the gas storage cavity. During the relative distance between the first component and the second component, the initial state of the sealed cavity is close to vacuum, and the external space (such as atmospheric pressure) forms a pressure difference with the sealed cavity, and the gas will enter the sealed cavity from the first air channel. When the first component and the second component are relatively close, although part of the gas will be discharged from the first air channel into the sealed cavity, since the pressure difference between the sealed cavity and the external space at this time is much smaller than the pressure difference during air intake, the exhaust flow rate at this time is much smaller than the flow rate during air intake, and more gas enters the gas storage cavity from the second air channel. Repeating this, the gas storage cavity can be inflated. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1-4 A schematic structural diagram of a first embodiment of the air pump of the present application;

[0051] Figure 5-9 This is a schematic structural diagram of a second embodiment of the air pump of the present application;

[0052] Figure 10-13 This is a schematic structural diagram of a third embodiment of the air pump of the present application;

[0053] Figure 14-18 This is a schematic structural diagram of a fourth embodiment of the air pump of the present application;

[0054] Fig.19 This is a structural schematic diagram of a fifth embodiment of the air pump of the present application;

[0055] Fig. 20 This is a schematic structural diagram of a sixth embodiment of the air pump of the present application;

[0056] Figure 21-22 This is a structural schematic diagram of a seventh embodiment of the air pump of the present application;

[0057] Fig.23 This is a schematic structural diagram of an eighth embodiment of the air pump of the present application;

[0058] Fig.24 This is a schematic structural diagram of a ninth embodiment of the air pump of the present application;

[0059] Figure 25-26 A schematic structural diagram of a tenth embodiment of the air pump of the present application;

[0060] Figure 27-28A schematic structural diagram of an eleventh embodiment of the air pump of the present application;

[0061] Fig.29 This is a schematic structural diagram of an embodiment of the combined air pump of the present application. DETAILED DESCRIPTION

[0062] The present invention is further described in detail below through specific implementations in combination with the accompanying drawings. The present application can be implemented in a variety of different forms and is not limited to the implementation described in this embodiment. The purpose of providing the following specific implementations is to facilitate a clearer and more thorough understanding of the disclosure of the present application, wherein words indicating directions such as up, down, left, and right are only for the position of the structure shown in the corresponding drawings.

[0063] However, those skilled in the art may realize that one or more of the specific details may be omitted, or other methods, components or materials may be used. In some examples, some embodiments are not described or are not described in detail.

[0064] In addition, the technical features and technical solutions described herein may be combined in any suitable manner in one or more embodiments. It is easy for a person skilled in the art to understand that the steps or operation sequence of the methods related to the embodiments provided herein may also be changed. Therefore, any sequence in the drawings and embodiments is only for illustrative purposes and does not imply a requirement to follow a certain sequence unless it is explicitly stated that a certain sequence is required.

[0065] The present application provides an air pump, which includes a first component, a second component and a driving device.

[0066] The second component is arranged opposite to the first component, and the driving device drives at least one of the first component and the second component, so that the first component and the second component can complete the action of being relatively far away and relatively close to each other alternately.

[0067] The first component and the second component have a connection structure that enables the two to form a sealed cavity when they are away from each other. The cavity wall of the sealed cavity is provided with a first air channel for communicating with the external space and a second air channel for communicating with the gas storage cavity. The first air channel runs through the first component, and the opening of the first air channel facing the second component is the first opening, and the opening of the first air channel facing the external space is the second opening. The area of ​​the side of the second component facing the first opening is larger than the opening area of ​​the first opening, so that the orthographic projection of the first opening on the second component falls on the side facing the first opening

[0068] When the first component and the second component are relatively far apart, the initial state of the sealed cavity is close to vacuum, and a pressure difference is formed between the external space (such as atmospheric pressure) and the sealed cavity, and gas will enter the sealed cavity from the first air channel. When the first component and the second component are relatively close, although part of the gas will be discharged from the first air channel into the sealed cavity, the pressure difference between the sealed cavity and the external space is much smaller than the pressure difference during air intake, so the exhaust flow rate is much smaller than the intake flow rate, and more gas enters the gas storage cavity from the second air channel. Repeating this process can complete the inflation operation in the gas storage cavity.

[0069] Embodiment 1:

[0070] This embodiment provides an air pump, which can be applied to various types of air charging and discharging structures, such as an electronic sphygmomanometer.

[0071] Please refer to Figure 1-4 In one embodiment, the air pump includes a first component 110, a second component 120 and a driving device 130. The driving device 130 is only a schematic diagram and does not show a specific structure.

[0072] In this embodiment, the driving device 130 outputs reciprocating linear motion. The driving device 130 is connected to the second component 120, and is used to drive the second component 120 to move closer to and away from the first component 110. In addition, in other embodiments, the driving device 130 can also be used to drive the first component 110, or the driving device 130 drives the first component 110 and the second component 120 at the same time, so as to achieve the action of making the first component 110 and the second component 120 move away from and closer to each other. When the driving device 130 drives the first component 110 and the second component 120 at the same time, the same power source can be used for driving, for example, different transmission mechanisms can be used to drive the first component 110 and the second component 120 respectively; different power sources can also be used to drive the first component 110 and the second component 120 respectively.

[0073] like Figure 2 and 3 As shown, when the first component 110 and the second component 120 have a connection structure that enables the two to form a sealed cavity A when they are away from each other. The cavity wall of the sealed cavity A is provided with a first gas channel 111 for communicating with the external space and a second gas channel 112 for communicating with the gas storage cavity 140.

[0074] The first air channel 111 passes through the first component 110, and may be disposed only on the first component 110, or may be composed of the first component 110 and other structures. The first air channel 111 has one end opening facing the second component 120 as the first opening, and one end opening facing the external space (e.g., atmospheric pressure) as the second opening.

[0075] In order to form a sealed cavity A close to a vacuum state when the second component 120 quickly moves away from the first component 110, the area of ​​the side b of the second component 120 facing the first opening is larger than the opening area of ​​the first opening, so that the orthographic projection of the first opening on the second component 120 falls on the side b facing the first opening. That is, Figure 1 and 2 As shown, the horizontal area of ​​one side b of the second component 120 facing the first opening is larger than the opening area of ​​the first opening, and the orthographic projection of the first opening completely falls within the range of the side b of the second component 120 .

[0076] When the second component 120 moves away from the first component 110, the second component 120 will temporarily take away the gas at the first opening, thereby forming a short-term vacuum space. Since the air pressure in the sealed cavity A is lower than the atmospheric pressure, assuming that it is close to a vacuum, a positive pressure difference is formed between the external space outside the sealed cavity A (such as atmospheric pressure) and the sealed cavity A, and the external gas enters the sealed cavity A through the first air channel 111 under this pressure difference. Although, when the sealed cavity A is initially formed, the gas storage cavity 140 may also enter the sealed cavity A through the second air channel 112, the gas in the gas storage cavity 140 will not instantly fill the sealed cavity A, so the sealed cavity A will always inhale gas from the external space.

[0077] like Figure 4 As shown, when the driving device 130 drives the second component 120 to approach the first component 110, the gas in the sealed cavity A is compressed by the second component 120, and flows out from the first gas channel 111 and the second gas channel 112 to the external space and the gas storage cavity 140 respectively. However, since the pressure difference between the sealed cavity A and the external space is much smaller than the pressure difference during air intake, the flow rate of exhaust from the first gas channel 111 is much smaller than the flow rate during air intake from the first gas channel 111, and more gas enters the gas storage cavity 140 from the second gas channel 112. Repeating this process can complete the operation of inflating the gas storage cavity 140.

[0078] Taking the external space as atmospheric pressure as an example, when the sealed cavity A is initially formed, the pressure difference between the external space and the sealed cavity A reaches 760 mmHg, i.e., 101.3 kPa, and the gas in the external space enters the sealed cavity A under this pressure difference. When the second component 120 and the first component 110 are close to each other, taking the maximum pressure (pressure) usually required by the sphygmomanometer as an example, assuming that the air pressure in the sealed cavity A and the gas storage cavity 140 has reached the maximum pressure (pressure) usually required by the sphygmomanometer, i.e., 300 mmHg, i.e., 40 kPa, higher than the atmospheric pressure, the pressure difference between the sealed cavity A and the gas storage cavity 140 and the external atmospheric pressure is 300 mmHg, i.e., 40 kPa. Under the same time and environment, since the flow rate and flow rate of the gas in the first airway 111 are proportional to the pressure difference, it can be seen that the flow rate of the air intake from the first airway 111 is greater than the flow rate of the exhaust. In the process that the first component 110 and the second component 120 are moving away from each other and then approaching each other, the gas flowing into the sealed cavity A from the first gas channel 111 is greater than the gas discharged from the first gas channel 111. This process is repeated several times to complete the inflation and pressurization of the gas storage cavity 140. This air pump can fully meet the inflation requirements of the electronic sphygmomanometer.

[0079] This air pump relies on the high-speed and small relative movement of the first component 110 and the second component 120 to inhale and exhaust air, and does not require an overly complex structure. Figure 2 For example, assuming that the outer size of the cavity structure 150 is φ5*3, the first component 110 is a part of the cavity structure 150, and the first component 110 and the second component 120 are φ4, the first airway 111 is a hole of φ0.5, and the driving device 130 is a device that provides the second component 120 with a relative movement of 0.1mm (or even smaller) to the first component 110, then the air pump can be made into a size of φ5*3. This air pump is smaller than the existing technology and is more suitable for application in wearable electronic blood pressure monitors.

[0080] Furthermore, in one embodiment, the switching between the movement of the first component 110 and the second component 120 moving away from each other and moving toward each other is performed when the air pressure of the sealed cavity A is less than or equal to the air pressure of the gas storage cavity 140, that is, after the second component 120 moves away from the first component 110, when the air pressure of the sealed cavity A has not yet reached the air pressure of the gas storage cavity 140 or has just reached the air pressure of the gas storage cavity 140, it moves in the opposite direction toward the first component 110. This can reduce the amount of gas in the sealed cavity A flowing out from the first gas channel 111, and discharge as much gas as possible into the gas storage cavity 140.

[0081] Furthermore, in some embodiments, the switching between the movement of the first component 110 and the second component 120 moving away from each other and moving toward each other can also be performed at the moment when the air pressure in the sealed cavity A is less than or reaches the air pressure in the external space, that is, after the second component 120 moves away from the first component 110, when the air pressure in the sealed cavity A has not yet reached the air pressure in the external space or has just reached the air pressure in the external space, it moves in the opposite direction toward the first component 110. In this way, before the second component 120 moves in the opposite direction, the sealed cavity A will not be exhausted to the external space due to the pressure difference with the external space, further reducing the amount of gas in the sealed cavity A flowing out from the first gas channel 111, and exhausting as much gas as possible into the gas storage cavity 140.

[0082] Please refer to Figure 4 When exhaust is required, the second component 120 can be kept at Figure 4 In the position shown, the second component 120 and the first component 110 remain separated for a period of time. Since the gas pressure in the sealed cavity A and the gas storage cavity 140 is eventually higher than the atmospheric pressure, the gas therein will automatically flow out from the first gas channel 111 to the outside of the atmospheric pressure.

[0083] In some embodiments, an elastic member is provided between the first component 110 and the second component 120 for keeping the first component 110 and the second component 120 separated. Thus, when the driving device 130 stops working, the elastic member can keep the first component 110 and the second component 120 separated by its own elasticity to exhaust air, so as to save energy without separating the first component 110 and the second component 120 by the driving device 130.

[0084] In some embodiments, the elastic member may form an integral structure with the first component 110 or the second component 120 .

[0085] For further information, please refer to Figure 1 and 2 In one embodiment, the first component 110 and the second component 120 use the state of being in close contact with each other as the starting point of the relative moving away action, so that the sealed cavity A formed when the first component 110 and the second component 120 are moving away from each other can be more easily close to vacuum in the initial state.

[0086] Of course, in other embodiments, the first component 110 and the second component 120 can also be spaced apart from each other at a certain distance as the starting point of the relatively moving away action.

[0087] Please continue to refer to Figure 2In order to ensure that the first component 110 and the second component 120 can form a connection structure of a sealed cavity A when they are away from each other, in one embodiment, it also includes a cavity structure 150, which has a cavity, the first component 110 is a part of the cavity structure 150, and the second component 120 is movably arranged in the cavity structure 150 facing the first component 110, and is arranged facing the first component 110.

[0088] At the same time, when the second component 120 moves away from the first component 110 , the second component 120 divides the cavity into a sealed cavity A and a gas storage cavity 140 , and the sealed cavity A is connected to the gas storage cavity 140 through the second gas channel 112 .

[0089] The gas storage chamber 140 can be used as a terminal accommodating chamber. For example, in some embodiments, at least part of the cavity wall of the gas storage chamber 140 is made of a flexible or elastic material to form an air bag. In this way, the air pump and the air bag can be completely integrated into one, which greatly simplifies the existing structure in which the air pump and the air bag are independently arranged, making the air pump smaller in size and more suitable for application in wearable electronic blood pressure monitors.

[0090] In addition, the gas storage chamber 140 can also be used as a temporary storage chamber. For example, it can have a third air channel for conducting gas to other spaces, and the gas is discharged into other spaces, such as an airbag, through the third air channel.

[0091] Further, to facilitate the flow of gas, please refer to Figure 3 and 4 In one embodiment, the opposite sides a and b of the first component 110 and the second component 120 are both smooth planes.

[0092] The specific structure of the driving device 130 is not shown in this embodiment, and various devices capable of outputting reciprocating motion may be used. Such a device may directly realize reciprocating linear motion by means of a cylinder, an oil cylinder, etc., or may realize reciprocating motion by means of a motor plus a transmission mechanism, or may use other devices to realize reciprocating motion.

[0093] Embodiment 2

[0094] This embodiment provides a second air pump.

[0095] Please refer to Figure 5 and 6, this embodiment provides a specific structure of a cavity structure 210. The cavity structure 210 has a cavity, and the first component 210b is a part of the cavity structure 210. Specifically, the cavity structure 210 includes a cover 210a, a seat 210c and a first component 210b. The seat 210c has a concave cavity. The cover 210a and the seat 210c form a cavity shape, and the first component 210b is installed on the side of the cavity where the cover 210a is located. The cover 210a and the first component 210b together form a first air channel 111, which is used to connect the external space with the interior of the cavity structure 210, for example, the channels 213, 214, and 211 of the cover 210a and the first component 210b are connected to form the first air channel 111. Among them, the channel 214 of the cover 210a forms a recessed portion, and the periphery of the first component 210b is airtightly bonded to the periphery of the recessed portion 214. The cover 210a and the base 210c are also fixed in an airtight manner.

[0096] In order to reduce noise, in some embodiments, the first air passage 111 has a silencer cavity. Figure 6 As shown, the hole 214 constitutes a silencer chamber of the first air channel 111 .

[0097] Please refer to Figure 6 In one embodiment, the second component 220 is installed in the cavity and faces the first component 210b. At the same time, the second component 220 divides the cavity into an installation cavity, and the driving device 250 is installed in the installation cavity.

[0098] Please refer to Figure 5 and 6 In this embodiment, the driving device is a moving coil electromagnetic driving device 250, and the first component 210b and / or the second component 120 are driven by the moving coil of the moving coil electromagnetic driving device 250. The moving coil electromagnetic driving device 250 includes a soft iron pressing block 251, a permanent magnet 252, a coil 253 and a conductive magnet 254.

[0099] For further information, please refer to Figure 5 and 7 In one embodiment, the elastic member 230 and the second member 220 are fixed together or form an integral structure.

[0100] Specifically, the second component 220 is a flat plate structure, and the elastic member 230 surrounds the flat plate and protrudes toward the side where the first component 210b is located, so as to bounce the first component 210b and the second component 220 apart when the driving device stops working.

[0101] Furthermore, the elastic member 230 is a spring sheet disposed around the flat plate body, and one end of the spring sheet protrudes outward from the location of the flat plate body.

[0102] Please refer to Figure 7 In one embodiment, the number of the spring pieces is three, and the three spring pieces are distributed around the flat plate in a substantially circular manner and at equal angles. Each spring piece is substantially a strip-shaped structure and is distributed in an arc shape.

[0103] Of course, in other embodiments, the first component 210b may also be fixed together or integrally formed with the elastic member 230. Similarly, the first component 210b may also include a flat plate, and the elastic member 230 surrounds the flat plate and protrudes toward the side where the second component 220 is located, so as to bounce the first component 210b and the second component 220 apart when the driving device stops working.

[0104] Of course, the structure of the elastic member and the first component 210b or the second component 220 shown in this embodiment can also be applied to other embodiments.

[0105] Please refer to Figure 6 In one embodiment, the second air channel 112 is disposed on the second component and the third air channel 113 is disposed on the seat body 210c, which guide the gas in the sealed cavity A out from the bottom of the air pump.

[0106] The working process of this embodiment is briefly described as follows:

[0107] like Figure 6 As shown, in a natural state, the elastic member 230 presses against the first component 210b, so that the second component 220 is separated from the first component 210b.

[0108] The moving coil electromagnetic drive device 250 first drives the second component 220 to move toward the first component 210b to abut against the small hole 211. Figure 8 As shown, the moving coil electromagnetic drive device 250 drives the second component 220 to move quickly away from the small hole 211, forming a sealed cavity A between the second components 220 and 210b. The initial air pressure of the sealed cavity A is close to vacuum, and air flows into the sealed cavity A through the first air channel 111.

[0109] On the return trip, if Fig. 9 As shown, the moving coil electromagnetic drive device 250 drives the second component 220 to move quickly toward the first component 210b. As the sealed cavity shrinks, part of the gas in the sealed cavity flows out of the sealed cavity through the first gas channel 111, and the other part of the gas is discharged to other spaces through the second gas channel 112 (part of the gas may enter the cavity structure 210). The above process is repeated to complete the inflation process.

[0110] When the air pump is exhausted, the electromagnetic driving device 250 stops working, the elastic member 230 pushes the second component 220 to move away from the first component 210 b and stays at a position away from the first component 210 b, and the compressed gas is discharged through the first air channel 111 .

[0111] In order to reduce noise, in some embodiments, the third air passage 113 has a silencer cavity. Figure 6 As shown, a silencer chamber 215 is provided on the third air passage 113 to reduce noise.

[0112] Embodiment 3

[0113] This embodiment provides a third air pump.

[0114] Please refer to Figure 10-13 In this embodiment, the cavity structure 310 has a cavity, and the first component 310b is a part of the cavity structure 310. Specifically, the cavity structure 310 includes a cover 310a, a base 310c and a first component 310b. The base 310c has a concave cavity. The cover 310a and the base 310c form a cavity shape. The first component 310b is installed on the side of the cavity where the cover 310a is located. The cover 310a and the first component 310b together form a first air channel 111, which is used to connect the external space with the interior of the cavity structure 310. For example, the channels 313, 314, and 311 of the cover 310a and the first component 310b are connected to form the first air channel 111. Among them, the channel 314 of the cover 310a forms a recessed portion, and the periphery of the first component 310b is airtightly bonded to the periphery of the recessed portion 314. The cover 310a and the base 310c are also fixed in an airtight manner.

[0115] Please refer to Fig.11 In one embodiment, the second component 320 is installed in the cavity and faces the first component 310b. At the same time, the second component 320 divides the cavity into an installation cavity, and the driving device is installed in the installation cavity.

[0116] For further information, please refer to Figure 10-13 In one embodiment, the driving device adopts a moving iron type electromagnetic driving device, and the first component 310b and / or the second component 320 are driven by the moving iron of the moving iron type electromagnetic driving device. The moving iron type electromagnetic driving device 350 includes a soft iron pressing block 351, a coil assembly 352, a moving iron 353, a spring 330 and a conductive magnet 254. The second component 320 is fixed to the moving iron 353 and moves with the moving iron 353.

[0117] Figure 11-13 is a cross-sectional view of the assembled state of this embodiment, wherein Fig.12As shown, when the moving iron 353 moves downward, the moving iron 353 drives the second component 320 away from the first component 310 b, thereby allowing the gas to enter the sealed cavity between the first component 310 b and the second component 320 . Fig.13 As shown, when the moving iron 353 moves upward, the moving iron 353 drives the second component 320 to approach the first component 310b, so that part of the gas is discharged from the sealed cavity between the first component 310b and the second component 320 through the first gas channel 111. The gas collected in the sealed cavity is discharged to other spaces through the second gas channel 112 and the third gas channel 113.

[0118] Embodiment 4

[0119] This embodiment provides a fourth air pump.

[0120] Please refer to Figure 14-17 In this embodiment, the cavity structure 410 has a cavity, and the first component 410b is a part of the cavity structure 410. Specifically, the cavity structure 410 includes a cover 410a, a base 410c, a first component 410b and a support plate. The base 410c has a concave cavity. The cover 410a and the base 410c form a cavity shape. The first component 410b is installed on the side of the cavity where the cover 410a is located. The cover 410a and the first component 410b together form a first air channel 111, which is used to connect the external space with the interior of the cavity structure 410. For example, the channels 413, 414, and 411 of the cover 410a and the first component 410b are connected to form the first air channel 111. Among them, the channel 414 of the cover 410a forms a recessed portion, and the periphery of the first component 410b is airtightly bonded to the periphery of the recessed portion 414. The cover body 410a and the base body 410c are also fixed in an airtight manner.

[0121] Please refer to Fig.15 In one embodiment, the second component 420 is installed in the cavity and faces the first component 410b. At the same time, the second component 420 divides the cavity into a gas storage cavity 140, and the gas storage cavity 140 is connected to the sealed cavity through the second gas channel 112. At the same time, the gas storage cavity 140 also serves as an installation cavity, and the driving device is installed in the gas storage cavity 140.

[0122] For further information, please refer to Figure 15-18 In one embodiment, the driving device is a polymer driving device 450 that can be stretched by applying a voltage. In other embodiments, the driving device can be an elastic driving device that can be stretched by applying a voltage, a polymer driving device that can be stretched by applying a voltage, a piezoelectric device that can be deformed by applying an electric field, or a flat capacitor device whose medium is an elastic member.

[0123] like Fig.18As shown, the polymer driving device 450 capable of stretching and contracting by applying voltage includes an electrode 450b, a polymer 450a, and an electrode 450c. Fig.16 and 18 As shown, after applying voltage between electrodes 450b and 450c, polymer 450a shrinks and deforms, driving second component 420 away from first component 410b. Fig.17 and 18 As shown, the polymer 450a is deformed and disappears, and then resets, driving the second component 420 to approach the first component 410b. Finally, the deformation is used to push the mover 420 to move, completing the inflation process.

[0124] like Fig.16 As shown, the gas storage chamber 140 is filled and discharged into other spaces, such as an airbag, through the third air passage 113 .

[0125] Embodiment 5

[0126] This embodiment provides a fifth air pump.

[0127] The difference between the air pump shown in the fifth embodiment and the fourth embodiment is that:

[0128] Please refer to Fig.19 In one embodiment, it also includes an air intake check valve 531, which is arranged corresponding to the first air channel 111 to allow the first air channel 111 to intake air into the sealed cavity in a unidirectional manner.

[0129] For further information, please refer to Fig.19 In one embodiment, it also includes an exhaust one-way valve 532, which is set corresponding to the third air duct 113 to allow the third air duct 113 to exhaust air to other spaces in a one-way manner.

[0130] In other embodiments, the exhaust check valve may also be disposed on the second air passage 112 to allow the third air passage 113 to exhaust air into the gas storage chamber 140 in a one-way manner.

[0131] Embodiment 6

[0132] This embodiment provides a sixth air pump.

[0133] Please refer to Fig. 20 In one embodiment, the second components 620 are at least two. Each second component 620 is respectively provided with a first component 610, or at least two second components 620 are used together with one first component 610. That is, one second component 620 can be used in conjunction with one first component 610, or it can also be used as follows. Fig. 20 As shown, two or more second components 620 are used together to correspond to one first component 610 .

[0134] Each second component 620 is correspondingly provided with a first opening 611 of the first air channel. The second openings of the first air channels 111 on all the first components 610 are independently provided or at least partially integrated together.

[0135] After more than two second components 620 are provided, multiple groups of inflatable structures are formed, thereby increasing the output flow of the air pump.

[0136] Similarly, in some other embodiments, there are at least two first components 610. Each first component 610 is respectively provided with a second component 620, or at least two first components 610 are used together with one second component 620. Similarly, the second opening of the first airway on the first component 610 is independently provided or at least partially integrated together.

[0137] like Fig. 20 As shown, when there are more than two second components 620 and / or first components 610, they can be disposed together in the same cavity structure.

[0138] Embodiment 7

[0139] This embodiment provides a seventh air pump.

[0140] Please refer to Fig.21 and 22 In one embodiment, the air pump includes a cavity structure 710, a first component 710b, a second component 720, a driving device 750 and an airbag 710d. The driving device 750 drives the second component 720 and the first component 710b to move relatively far away from each other and relatively close to each other for inflation. The airbag 710d is connected to the second airway 112. The gas filled by the air pump enters the airbag 710d through the second airway 112. When the airbag 710d needs to be deflated, the second airway 112 and the first airway 111 are used for deflation.

[0141] Embodiment 8

[0142] This embodiment provides an eighth air pump.

[0143] In one embodiment, the driving device drives the first component to move. Fig.23 , further comprising a cavity structure 810, the second component 830 being fixedly disposed in the cavity structure 810, and the first component 820 and the second component 830 being relatively and movably disposed in the cavity structure 810.

[0144] For further information, please refer to Fig.23 In one embodiment, the first component 820 is mounted on the elastic mounting seat 840, and the driving device 850 drives the elastic mounting seat 840 to partially deform, such as Fig.23As shown, the driving device 850 drives the middle portion of the elastic mounting seat 840 to deform, so as to make the first component 820 and the second component 830 move relative to each other to form a sealed cavity.

[0145] The elastic mounting seat 840 is fixed to the cavity structure 810, and an opening is arranged in the middle of the elastic mounting seat 840 to communicate with the first component 820. The gas inhaled from the first air passage 111 is discharged to other spaces through the second air passage 112 and the third air passage 113.

[0146] Please continue to refer to Fig.23 In one embodiment, the driving device 850 may be a moving coil electromagnetic driving device 850 or other driving devices.

[0147] Embodiment 9

[0148] This embodiment provides a ninth air pump.

[0149] Please refer to Fig.24 The driving device used in the air pump of this embodiment is a piezoelectric crystal device. The piezoelectric crystal device 950 includes a piezoelectric crystal 950a, an electrode 950b and an electrode 950c.

[0150] The driving device 950 applies a voltage between the electrode 950b and the electrode 950c, and the piezoelectric crystal 950a contracts. When the applied voltage disappears, the piezoelectric crystal 950a returns to its original shape, thereby driving the first component or the second component to move.

[0151] Embodiment 10

[0152] This embodiment provides a tenth air pump.

[0153] The air pump adopts a different driving device. The driving device adopts an electrode combination structure that attracts each other after voltage is applied, and the first component and the second component move relatively close to and relatively away from each other by applying and removing voltage.

[0154] Please refer to Fig.25 and 26 In one embodiment, the electrode assembly structure includes a first electrode 1010a and a second electrode 1021. The first electrode 1010a is the first component of this embodiment. The first electrode 1010a and the housing 1010c form a cavity, and the cavity has a first gas channel 1011 and a third gas channel 1013 for connecting other spaces. The second component is an elastic structure 1022, and the second electrode 1021 and the elastic structure 1022 are bonded together to form an electrode assembly 1020. The elastic structure 1022 divides the cavity into a sealed cavity A and a gas storage cavity B.

[0155] In some embodiments, a gasket 1010b is disposed between the elastic structure 1022 and the first electrode 1010a for isolation. The gasket 1010b, the housing 1010c and the elastic structure 1022 are all insulators to avoid affecting the movement of the electrode assembly structure.

[0156] During operation, a voltage is applied between the first electrode 1010a and the second electrode 1021, the first electrode 1010a and the second electrode 1021 attract each other, the electrode assembly 1020 approaches the first electrode 1010a, and part of the gas in the sealed cavity A enters the gas storage cavity B through the second gas channel 1012, and part of the gas is discharged through the first gas channel 1011; when the voltage applied between the first electrode 1010a and the second electrode 1021 is removed, the electrode assembly 1020 moves away from the first electrode 1010a under the elastic force of the elastic structure 1022, the volume of the sealed cavity A expands, and the outside air enters the sealed cavity A through the first gas channel 1011. The above actions are repeated, and the outside air is sucked into the gas storage cavity B to form compressed gas. The compressed gas is then output through the third gas channel 1013.

[0157] The above actions are repeated alternately, so that the gas in the external space can enter the sealed cavity A from the first gas channel 1011 and further enter the gas storage cavity B.

[0158] In other embodiments, the first electrode and the second electrode may be provided separately without using the first component or the second component as an electrode. In this embodiment, the driving device includes a first electrode and a second electrode that attract each other after voltage is applied, the first component or the second component is an elastic structure, and the first electrode or the second electrode is installed as a whole with the elastic structure.

[0159] Embodiment 11

[0160] This embodiment provides an eleventh air pump.

[0161] The air pump adopts a different driving device. The driving device also adopts an electrode combination structure that attracts each other after voltage is applied, and the first component and the second component move relatively close to and relatively away from each other by applying and removing voltage.

[0162] One of the first component and the second component is designed as a first electrode, and the other of the first component and the second component is an elastic structure, on which the second electrode is arranged. In addition, a third electrode is also included, wherein the second electrode and the elastic structure are arranged between the first electrode and the third electrode.

[0163] Please refer to Fig. 27 and 28In one embodiment, the electrode assembly structure includes a first electrode 1110a, a second electrode 1121 and a third electrode 1130. The first electrode 1110a is used as the first component of this embodiment. The first electrode 1110a and the outer shell 1110c surround a cavity, and the cavity has a first air channel 1111 and a third air channel 1113 for connecting other spaces. The second component is an elastomeric structure 1122, and the second electrode 1121 and the elastomeric structure 1122 are bonded together to form an electrode assembly 1120. There can be two elastomeric structures 1122, sandwiching the second electrode 1121 in the middle. The elastomeric structure 1122 divides the cavity into a sealed cavity A and a gas storage cavity B.

[0164] In some embodiments, a gasket 1110b is disposed between the elastic structure 1122 and the first electrode 1110a for isolation. The gasket 1110b, the housing 1110c and the elastic structure 1122 are all insulators to avoid affecting the movement of the electrode assembly structure.

[0165] A voltage is applied between the third electrode 1130 and the first electrode 1110a, such as the third electrode 1130 is positive and the first electrode 1110a is negative (grounded). During operation, a positive voltage (such as the same voltage as the third electrode 1130) is applied to the second electrode 1121, the first electrode 1110a and the second electrode 1121 attract each other, the electrode assembly 1120 approaches the first electrode 1110a, a part of the gas in the sealed cavity A enters the gas storage cavity B through the second gas channel 1112, and a part is discharged through the first gas channel 1111; the second electrode 1121 is grounded (the voltage is removed), the second electrode 1121 and the third electrode 1130 attract each other, the electrode assembly 1120 approaches the third electrode 1130, the electrode assembly 1120 moves away from the first electrode 1110a, the volume of the sealed cavity A expands, and the outside air enters the sealed cavity A through the first gas channel 1111. The above actions are repeated to suck the outside air into the gas storage cavity B to form compressed gas. The compressed gas is then output through the third gas channel 1113 .

[0166] The above actions are repeated alternately, so that the gas in the external space can enter the sealed cavity A from the first gas channel 1111 and further enter the gas storage cavity B.

[0167] Embodiment 12

[0168] In order to increase the output pressure of compressed gas, this embodiment provides a combined air pump, which includes at least two air pumps as described in any of the above embodiments, and all the air pumps are connected in series in sequence, that is, the exhaust port of the previous air pump is connected to the air inlet of the next air pump.

[0169] Please refer to Fig.29In one embodiment, the air pump shown in the first embodiment is used as an example for explanation. The two air pumps are connected in series in sequence, so that the third air channel 113 of the first air pump is connected to the first air channel 111 of the second air pump, thereby increasing the output pressure of the compressed gas.

[0170] Embodiment 13

[0171] The thirteenth embodiment provides a sphygmomanometer, which includes an air pump as shown in any of the above embodiments, for inflating and deflation of air;

[0172] Or, it includes a combined air pump as shown in Example 12, which is used for inflating and deflating air.

[0173] Embodiment 14

[0174] The present embodiment 14 provides a medical device, which includes an air pump as shown in any of the above embodiments, for inflating and defusing air;

[0175] Or, it includes a combined air pump as shown in Example 12, which is used for inflating and deflating air.

[0176] The above contents are further detailed descriptions of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention.

Claims

1. An air pump, characterized in that: include: first component; a second component, the second component being arranged opposite to the first component; and a driving device, wherein the driving device drives at least one of the first component and the second component so that the first component and the second component can perform an action of relatively moving away and relatively approaching each other alternately; The first component and the second component have a connection structure that enables the opposing surfaces of the two to form a sealed cavity when they are away from each other, and the cavity wall of the sealed cavity is provided with a first air channel for communicating with the external space and a second air channel for communicating with the gas storage cavity, the first air channel runs through the first component, and the opening of one end of the first air channel facing the second component is the first opening, and the opening of one end of the first air channel facing the external space is the second opening, the area of ​​one side of the second component facing the first opening is larger than the opening area of ​​the first opening, so that the orthographic projection of the first opening on the second component falls on the side facing the first opening; The driving device drives the first component and the second component to repeatedly and alternately move away from and approach each other, so that the gas in the external space can enter the sealed cavity from the first gas channel and then enter the gas storage cavity; Wherein, when the sealed cavity exists, the first air passage remains in an open state and communicates with the sealed cavity, and the second air passage remains in an open state and communicates with the sealed cavity.

2. The air pump according to claim 1, characterized in that The switching of the first component and the second component from moving away from each other to moving toward each other is performed when the air pressure in the sealed cavity is lower than the air pressure in the gas storage cavity, or at the moment when the air pressure in the sealed cavity reaches the air pressure in the gas storage cavity.

3. The air pump according to claim 1, characterized in that The switching of the first component and the second component from moving away from each other to moving toward each other is performed when the air pressure in the sealed cavity is lower than the air pressure in the external space, or at the moment when the air pressure in the sealed cavity reaches the air pressure in the external space.

4. The air pump according to claim 1, characterized in that An elastic member is provided between the first component and the second component for keeping the first component and the second component separated or close to each other.

5. The air pump according to claim 4, characterized in that The elastic member forms an integral structure with the first component or the second component.

6. The air pump according to claim 4, characterized in that The second component includes a flat plate body, and the elastic member surrounds the flat plate body and protrudes toward the side where the first component is located, so as to bounce the first component and the second component apart when the driving device stops working.

7. The air pump according to claim 4, characterized in that The first component includes a flat plate body, and the elastic member surrounds the flat plate body and protrudes toward the side where the second component is located, so as to bounce the first component and the second component apart when the driving device stops working.

8. The air pump according to claim 6, characterized in that The elastic member is a spring sheet arranged around the flat plate body, and one end of the spring sheet protrudes outward from the position where the flat plate body is located.

9. The air pump according to claim 8, characterized in that The number of the spring pieces is three or more, and the spring pieces are distributed around the flat plate in a substantially circular manner and at the same angle.

10. The air pump according to claim 1, characterized in that The first component and the second component are in a state of being in contact with each other as a starting point for the relative separation action.

11. The air pump according to any one of claims 1 to 10, characterized in that: The driving device outputs reciprocating linear motion, and the second component is driven by the driving device.

12. The air pump according to claim 11, characterized in that It comprises a cavity structure, wherein the cavity structure has a cavity, the first component is a part of the cavity structure, and the second component is installed in the cavity and arranged facing the first component.

13. The air pump according to claim 12, characterized in that When the second component moves away from the first component, the second component divides the cavity into the sealed cavity and the gas storage cavity, and the sealed cavity is connected with the gas storage cavity through the second air passage.

14. The air pump according to claim 13, characterized in that At least part of the cavity wall of the gas storage cavity is made of flexible or elastic material to form an air bag.

15. The air pump according to claim 13, characterized in that The gas storage chamber has a third gas channel for conducting gas to other spaces.

16. The air pump according to claim 11, characterized in that It comprises a cavity structure, wherein the first component and the second component are respectively parts of the cavity structure, and the second component is movably arranged facing the first component.

17. The air pump according to claim 11, characterized in that It comprises a cavity structure having a cavity, the first component is a part of the cavity structure, the second component is installed in the cavity and arranged facing the first component; the second component divides the cavity into an installation cavity, and the drive device is installed in the installation cavity.

18. The air pump according to any one of claims 1 to 10, characterized in that: The driving device outputs reciprocating linear motion, and the first component is driven by the driving device.

19. The air pump according to claim 18, characterized in that It also includes a cavity structure, the second component is fixedly arranged in the cavity structure, and the first component and the second component are relatively and movably arranged in the cavity structure.

20. The air pump according to claim 18, characterized in that The first component is mounted on the elastic mounting seat, and the driving device drives the elastic mounting seat to partially deform, so as to make the first component and the second component move relative to each other to form the sealed cavity.

21. The air pump according to claim 1, characterized in that The driving device adopts a moving coil electromagnetic driving device, and the first component and / or the second component is driven by the moving coil of the moving coil electromagnetic driving device.

22. The air pump according to claim 1, characterized in that The driving device adopts a moving iron type electromagnetic driving device, and the first component and / or the second component are driven by the moving iron of the moving iron type electromagnetic driving device.

23. The air pump according to claim 1, characterized in that The driving device is an elastic member driving device that can be stretched or contracted by applying a voltage, a polymer driving device that can be stretched or contracted by applying a voltage, or a device that can be deformed by applying an electric field.

24. The air pump according to claim 1, characterized in that The driving device adopts an electrode combination structure that attracts each other after voltage is applied, and the first component and the second component move relatively closer and farther by applying and removing voltage.

25. The air pump according to claim 24, characterized in that One of the first component and the second component is designed as a first electrode, and the other of the first component and the second component is an elastic structure, on which a second electrode is arranged.

26. The air pump according to claim 24, characterized in that One of the first component and the second component is designed as a first electrode, and the other of the first component and the second component is an elastomeric structure, on which a second electrode is arranged, and further includes a third electrode, and the second electrode and the elastomeric structure are arranged between the first electrode and the third electrode.

27. The air pump according to claim 1, characterized in that It also includes an air bag, which is communicated with the second air channel and is used for inflating and deflating air in the air bag.

28. The air pump according to claim 1, characterized in that The first air passage has a silencer cavity therein.

29. The air pump according to claim 1, characterized in that The second air passage has a silencer cavity therein.

30. The air pump according to claim 1, characterized in that There are at least two first components; each of the first components is respectively provided with a corresponding second component, or at least two first components are used together for one second component; the second openings of the first airways on all the first components are independently provided or at least partially integrated together.

31. The air pump according to claim 1, characterized in that There are at least two second components; each of the second components is respectively provided with a corresponding first component, or at least two second components are used together for one first component; each of the second components is correspondingly provided with a first opening of the first airway, and the second openings of the first airways on all the first components are independently provided or at least partially integrated together.

32. The air pump according to claim 1, characterized in that It also includes an air intake one-way valve, which is arranged corresponding to the first air channel to allow the first air channel to intake air into the sealed cavity in a one-way manner.

33. The air pump according to claim 1, characterized in that It also includes an exhaust one-way valve, which is arranged corresponding to the third airway to allow the third airway to exhaust air to other spaces in a one-way manner.

34. The air pump according to claim 1, characterized in that The first component and the second component have respective opposite surfaces which are smooth planes.

35. A combined air pump, characterized in that: It comprises at least two air pumps as described in any one of claims 1 to 34, and all the air pumps are connected in series in sequence.

36. A sphygmomanometer, characterized in that: It comprises an air pump as claimed in any one of claims 1 to 34, for inflating and deflation of air; Or, including a combined air pump as described in claim 35, used for inflating and deflating air.

37. A medical device, characterized in that: comprising an air pump as claimed in any one of claims 1 to 34, for inflating and deflation of air; Or, including a combined air pump as described in claim 35, used for inflating and deflating air.

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