CN108186001A - Air pump, combination air pump, electronic sphygmomanometer and medical instrument - Google Patents

Abstract

This application discloses a kind of air pump, combination air pump, electronic sphygmomanometer and medical instruments, the air pump includes the first component, second component and driving device, the second component is oppositely arranged with the first component, the driving device drive in the first component and second component at least first, the first component and second component is enable to complete alternately to be relatively distant from and relatively close action.The first component and second component form seal cavity when being located remotely from each other, and the cavity wall of the seal cavity is provided with the first air flue for being connected with exterior space and for the second air flue with gas storage chamber.It is relatively distant from the first component and second component completion with after relatively close action, gas enters gas storage chamber from the second air flue.It is repeated with this, you can complete to charge operation in gas storage chamber.

Description

Air pump, combined air pump, electronic sphygmomanometer and medical equipment

technical field

The present application relates to an air pump, especially an air pump applicable to an electronic sphygmomanometer.

Background technique

With the development and application of wearable concepts in the field of medical devices, products are required to be small in size and long in battery life. For example, the watch-type electronic sphygmomanometer is required to be the size of a real ordinary watch, rather than reluctantly calling the wrist-type electronic sphygmomanometer a watch-type electronic sphygmomanometer. This requires that the volume of the components used must be as small as possible, the power consumption should be as low as possible, and the battery used should be as large as possible. At present, the air pumps used in electronic sphygmomanometers are roughly divided into two types. One is the air pump driven by a micro motor. Although the power consumption can reach about 0.2-0.3W, the disadvantage is that the volume is too large, and the smallest air pump is currently The size is roughly 12mm*6mm*28mm. If it is used in a watch-type electronic sphygmomanometer, this kind of air pump will occupy the space of a normal lithium battery, making the capacity of the lithium battery much lower than that of an ordinary smart watch lithium battery; the other is Piezoelectric pump, although the piezoelectric pump has a relatively large advantage in thickness, the disadvantages are obvious and unbearable: most of its plane size exceeds 25mm*25mm, and the more fatal disadvantage is that the power is generally above 1W, while ordinary smart watches The lithium battery (roughly 280mAH) itself has a big problem of battery life, and it is even more difficult to guarantee its battery life when an air pump with a power consumption of more than 1W is added.

Contents of the invention

The present application provides a novel air pump and a combined air pump, as well as a sphygmomanometer and a medical device using the air pump or the combined air pump.

According to one aspect of the present application, an air pump is provided in an embodiment, including:

first part;

a second part, the second part is arranged opposite to the first part;

And a driving device, the driving device drives at least one of the first part and the second part, so that the first part and the second part can complete the actions of being relatively far away and relatively close alternately;

The first part and the second part have a connection structure that enables them to 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 for communicating with the external space. The second air channel connected to the gas storage chamber, the first air channel passes through the first part, and the first air channel opens at one end facing the second part as a first opening, and the first air channel faces the outer space The opening at one end is the second opening, and the area of the side of the second member 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 member falls on the surface facing the first opening. on one side;

The driving device drives the first part and the second part to repeatedly and alternately move away from and close to each other, so that the gas in the external space can enter the sealed cavity from the first air passage, and then enter the gas storage cavity.

As a further improvement of the air pump, the switching of the first part and the second part from moving away from each other to moving closer to each other is performed when the air pressure in the sealed cavity is lower than the air pressure in the gas storage chamber, or when the air pressure in the sealed cavity The moment the air pressure reaches the air pressure of the gas storage chamber.

As a further improvement of the air pump, the switching of the first part and the second part from moving away from each other to moving closer to each other is performed when the air pressure in the sealed cavity is lower than the air pressure in the external space, or when the air pressure in the sealed cavity It is carried out at the moment when the atmospheric pressure of the outer space is reached.

As a further improvement of the air pump, there is an elastic member between the first part and the second part for keeping the first part and the second part apart or close to each other.

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

As a further improvement of the air pump, the second component includes a flat body, and the elastic member surrounds the flat body and protrudes toward the side where the first component is located, so as to connect the first component and the second component when the driving device stops working. The two parts pop open.

As a further improvement of the air pump, the first component includes a flat body, and the elastic member surrounds the flat body and protrudes to the side where the second component is located, so as to connect the first component and the second component when the driving device stops working. The two parts pop open.

As a further improvement of the air pump, the elastic member is a shrapnel arranged around the flat body, and one end of the shrapnel protrudes outward from the position of the flat body.

As a further improvement of the air pump, there are three or more shrapnels, and the shrapnels are distributed around the flat body in a substantially circular manner and at the same angle.

As a further improvement of the air pump, the first component and the second component are in a state of being attached to each other as a starting point for a relative distance movement.

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

As a further improvement of the air pump, a cavity structure is included, 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 set facing the first component.

As a further improvement of the air pump, when the second part moves away from the first part, the second part divides the cavity into the sealed cavity and the gas storage cavity, and the sealed cavity and the gas storage The lumens communicate through the second airway.

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

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

As a further improvement of the air pump, a cavity structure is included, the first component and the second component are respectively a part of the cavity structure, and the second component is movably arranged facing the first component.

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 set facing the first component; The second component divides the cavity into an installation cavity, and the driving device is installed in the installation cavity.

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

As a further improvement of the air pump, it also includes a cavity structure, the second part is fixedly arranged in the cavity structure, and the first part is opposite to the second part and is movably arranged in the cavity structure.

As a further improvement of the air pump, the first component is installed on the elastic mounting seat, and the driving device drives the elastic mounting seat to partially deform so that the first component and the second component move relatively to form the sealed cavity .

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 are driven by the moving coil of the moving-coil electromagnetic driving device.

As a further improvement of the air pump, the driving device adopts a moving iron electromagnetic driving device, and the first part and/or the second part are driven by the moving iron of the moving iron electromagnetic driving device.

As a further improvement of the air pump, the driving device adopts an elastic member driving device that can expand and contract by applying a voltage, a polymer driving device that can expand and contract by applying a voltage, or a device that can be deformed by applying an electric field.

As a further improvement of the air pump, the driving device adopts an electrode combination structure that attracts each other after applying a voltage, and moves the first part and the second part relatively close to and relatively far apart by applying and removing the voltage.

As a further improvement of the air pump, one of the first part and the second part itself is designed as a first electrode, and the other of the first part and the second part is an elastic body structure, and the elastic body structure is A second electrode is provided.

As a further improvement of the air pump, one of the first part and the second part itself is designed as a first electrode, and the other of the first part and the second part is an elastic body structure, and the elastic body structure is A second electrode is provided, and a third electrode is also included, and the second electrode and the elastomeric structure are disposed between the first electrode and the third electrode.

As a further improvement of the air pump, an air bag is also included, and the air bag is communicated with the second air channel for inflating and deflating the air bag.

As a further improvement of the air pump, there is a sound-absorbing cavity in the first airway.

As a further improvement of the air pump, there is a sound-absorbing cavity in the second airway.

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 second component, or at least two first components are used together corresponding to a second component; all The second openings of the first air channel on the first component are provided independently or at least partly integrated together.

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 first component, or at least two second components are used together corresponding to a first component; Each of the second components is correspondingly provided with a first opening of the first air channel, and the second openings of the first air channel on all the first components are independently provided or at least partially integrated together.

As a further improvement of the air pump, an intake check valve is also included, and the intake check valve is arranged corresponding to the first air passage, so as to allow the first air passage to unidirectionally enter the sealed cavity.

As a further improvement of the air pump, an exhaust one-way valve is also included, and the exhaust one-way valve is arranged corresponding to the third air passage, so as to allow the third air passage to unidirectionally exhaust air to other spaces.

As a further improvement of the air pump, the opposite surfaces of the first component and the second component are smooth planes.

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

According to one aspect of the present application, an embodiment provides a sphygmomanometer, which includes the air pump as described in any one of the above, used for inflation and deflation;

Or, comprise the above-mentioned combination air pump, in order to inflate and deflate.

According to one aspect of the present application, a medical device is provided in an embodiment, which includes the air pump as described in any one of the above, used for inflation and deflation;

Or, comprise the above-mentioned combination air pump, in order to inflate and deflate.

The beneficial effect of this application is:

The air pump provided in this embodiment includes a first part, a second part and a driving device, the second part is arranged opposite to the first part, and the driving device drives at least one of the first part and the second part, so that The first part and the second part can complete the actions of being relatively far away and relatively close alternately. The first part and the second part form a sealed cavity when they are separated from each other, and the cavity wall of the sealed cavity is provided with a first air passage for communicating with the external space and a second air passage for communicating with the gas storage chamber. During the relative distance between the first part and the second part, 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 body. When the first part and the second part are relatively close, although part of the gas will be discharged from the first airway into the sealed cavity, the pressure difference between the sealed cavity and the external space is much smaller than that of the air intake at this time, so At this time, the flow rate of the exhaust gas is much smaller than the flow rate of the intake gas, and more gas enters the gas storage chamber from the second air channel. By repeating this, the operation of filling the gas storage cavity can be completed.

Description of drawings

Fig. 1-4 is the schematic structural diagram of the first embodiment of the air pump of the present application;

Fig. 5-9 is the structural representation of the second embodiment of the air pump of the present application;

10-13 are schematic structural views of the third embodiment of the air pump of the present application;

14-18 are schematic structural views of the fourth embodiment of the air pump of the present application;

Fig. 19 is a schematic structural view of a fifth embodiment of the air pump of the present application;

Fig. 20 is a schematic structural view of the sixth embodiment of the air pump of the present application;

21-22 are schematic structural views of the seventh embodiment of the air pump of the present application;

Fig. 23 is a schematic structural view of the eighth embodiment of the air pump of the present application;

Fig. 24 is a schematic structural view of the ninth embodiment of the air pump of the present application;

Figure 25-26 is a schematic structural view of the tenth embodiment of the air pump of the present application;

Figure 27-28 is a schematic structural view of the eleventh embodiment of the air pump of the present application;

Fig. 29 is a schematic structural view of an embodiment of the combined air pump of the present application.

Detailed ways

The present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings. The present application can be implemented in many different forms, and is not limited to the implementation manner described in this embodiment. The purpose of providing the following specific embodiments is to facilitate a clearer and more thorough understanding of the disclosure of the present application, wherein the words indicating orientation such as up, down, left, and right are only for the positions of the structures shown in the corresponding drawings.

However, those skilled in the art may recognize that description of one or more of the specific details may be omitted, or other methods, components or materials may also be used. In some instances, some implementations were not described or described in detail.

In addition, the technical features and technical solutions described herein can also be combined in any suitable manner in one or more embodiments. It is readily understood by those skilled in the art that the steps or sequence of operations of methods related to the embodiments provided herein can also be changed. Therefore, any order in the figures and examples is for illustrative purposes only and does not imply a certain order unless explicitly stated to do so.

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

The second part is arranged opposite to the first part, and the driving device drives at least one of the first part and the second part, so that the first part and the second part can complete the actions of being relatively far away and relatively close alternately.

The first part and the second part have a connection structure that enables the two to form a sealed cavity when they are far away from each other. A connected second air passage, the first air passage passes through the first part, and the end of the first air passage facing the second part is opened as a first opening, and the end of the first air passage facing the external space is opened as a second opening. The area of the side facing the first opening of the second component 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

During the relative distance between the first part and the second part, 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 body. When the first part and the second part are relatively close, although part of the gas will be discharged from the first airway into the sealed cavity, the pressure difference between the sealed cavity and the external space is much smaller than that of the air intake at this time, so At this time, the flow rate of the exhaust gas is much smaller than the flow rate of the intake gas, and more gas enters the gas storage chamber from the second air channel. By repeating this, the operation of filling the gas storage cavity can be completed.

Embodiment one:

This embodiment provides an air pump, which can be applied to various inflation and deflation structures, such as electronic sphygmomanometers.

Please refer to FIGS. 1-4 , in an embodiment, the air pump includes a first component 110 , a second component 120 and a driving device 130 . Wherein, the driving device 130 is only a schematic diagram, and does not show a specific structure.

In this embodiment, the driving device 130 outputs a reciprocating linear motion. The driving device 130 is connected with the second part 120 and is used for driving the second part 120 to move closer to and farther away from the first part 110 . In addition, in other embodiments, the driving device 130 can also be used to drive the first part 110, or the driving device 130 can drive the first part 110 and the second part 120 at the same time, so as to make the first part 110 and the second part 110 The motions of the parts 120 being relatively far away and relatively close together. When the driving device 130 drives the first part 110 and the second part 120 at the same time, it can be driven by the same power source, for example, the first part 110 and the second part 120 can be driven respectively through different transmission mechanisms; different power sources can also be used. source to drive the first component 110 and the second component 120 respectively.

As shown in FIGS. 2 and 3 , when the first component 110 and the second component 120 have a connection structure that enables them to form a sealed cavity A when they are separated 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 .

The first air channel 111 passes through the first component 110, and may be provided only on the first component 110, or may be composed of the first component 110 and other structures. One end of the first air passage 111 facing the second component 120 is opened as a first opening, and one end of the first air passage 111 facing the external space (such as atmospheric pressure) is opened as a second opening.

In order to make the second part 120 quickly move away from the first part 110, a sealed cavity A close to a vacuum state can be formed, the area of the side b of the second part 120 facing the first opening is larger than the opening area of the first opening, The orthographic projection of the first opening on the second component 120 falls on the side b facing the first opening. That is, as shown in FIGS. 1 and 2 , the horizontal area of the side b of the second member 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 on the second member 120 side. within the range of b.

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 of 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 (such as atmospheric pressure) outside the sealed cavity A and the sealed cavity A, and the external gas passes through the first pressure difference under this pressure difference. An air channel 111 enters the sealed chamber A. Although, when the sealed cavity A is initially formed, the gas storage cavity 140 may also enter the sealed cavity A through the second gas channel 112, but the gas in the gas storage cavity 140 will not fill the sealed cavity A instantly, Therefore, the sealed cavity A will always draw gas from the external space.

As shown in Fig. 4, when the driving device 130 drives the second part 120 to approach the first part 110, the gas in the sealed cavity A is compressed by the second part 120, which respectively flows from the first air channel 111 and the second part 110. The gas channel 112 flows out into the external space and into the gas storage cavity 140 . However, since the pressure difference between the sealed cavity A and the external space is much smaller than that of air intake at this time, the flow rate of exhaust gas from the first air passage 111 is much smaller than the flow rate of air intake from the first air passage 111 at this time. More gas enters the gas storage cavity 140 from the second gas channel 112 . By repeating this, the operation of filling the gas storage chamber 140 can be completed.

Taking the external space as the 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 760mmHg or 101.3kPa, and the gas in the external space enters the sealed cavity under this pressure difference. Inside chamber A. When the second part 120 and the first part 110 are close together, take the maximum pressure (pressure) usually required by a sphygmomanometer as an example, assuming that the air pressure in the sealed cavity A and the gas storage chamber 140 has reached the level normally required by a sphygmomanometer. The required maximum pressure (pressure) is 300mmHg higher than the atmospheric pressure, which is 40kPa. At this time, the pressure difference between the sealed cavity A and the gas storage chamber 140 and the external atmospheric pressure is 300mmHg, which is 40kPa. Under the same time and environment, since the flow velocity and flow rate of gas in the first air channel 111 are proportional to the pressure difference, it can be seen that the flow rate of the intake air from the first air channel 111 is greater than the flow rate of the exhaust gas. In the process of the first part 110 and the second part 120 moving away from each other first, and then approaching each other, the gas flowing into the sealed cavity A from the first air passage 111 is more than the gas discharged from the first air passage 111, and this is repeated many times , the inflation and pressurization of the gas storage chamber 140 can be completed. This air pump can fully realize the inflation requirement of the electronic sphygmomanometer.

The suction and exhaust of this air pump rely on the high-speed and small relative motion of the first component 110 and the second component 120 , and it does not require an overly complicated structure. Taking Fig. 2 as an example, assume that the size of the cavity structure 150 is φ5*3, the first part 110 is a part of the cavity structure 150, and the second component 120 is φ4, and the first airway 111 is φ0.5 hole, the driving device 130 is a device that provides a relative movement amount of 0.1mm (or even smaller) for the second part 120 to the first part 110, then the air pump can be made to a size of φ5*3. The air pump is smaller than the prior art, and is more conducive to being applied to a wearable electronic sphygmomanometer.

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

Further, in some embodiments, the switching between the first part 110 and the second part 120 moving away from each other and moving closer to 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, the second After the second part 120 moves away from the first part 110 , it moves in the opposite direction to the first part 110 when the air pressure in the sealed cavity A has not reached the air pressure of the external space or has just reached the air pressure of the external space. In this way, before the second component 120 moves backward, the sealed cavity A will not exhaust 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 air channel 111 , to discharge as much gas as possible into the gas storage chamber 140 .

Please refer to Fig. 4, when exhausting is required, the second part 120 can be maintained at the position shown in Fig. 4, that is, the second part 120 and the first part 110 remain separated for a period of time, due to the sealing cavity A and the gas storage chamber The air pressure in 140 is ultimately higher than atmospheric pressure, so the gas inside will automatically flow out from the first air channel 111 to outside the atmospheric pressure.

In some embodiments, there is an elastic member between the first part 110 and the second part 120 for keeping the first part 110 and the second part 120 apart. In this way, when the driving device 130 stops working, the elastic member can keep the first part 110 and the second part 120 separated by its own elasticity for exhausting, so as to save energy, and the first part 110 does not need to be moved by the driving device 130. separated from the second component 120.

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

Further, please refer to Figs. 1 and 2, in one embodiment, the first part 110 and the second part 120 take the state of being attached to each other as the starting point of the relative distance movement, so that the first part 110 and the second part The sealed cavity A formed when 120 is far away is more likely to be close to a vacuum in the initial state.

Of course, in other embodiments, the first component 110 and the second component 120 can also use a certain distance as the starting point of the relative distance movement.

Please continue to refer to FIG. 2 , in order to ensure that the first component 110 and the second component 120 can form a connection structure that seals the cavity A when they are far away from each other, in one embodiment, a cavity structure 150 is also included, and the cavity structure 150 There is a cavity, the first component 110 is a part of the cavity structure 150 , the second component 120 is movably disposed in the cavity structure 150 facing the first component 110 , and is disposed facing the first component 110 .

At the same time, when the second part 120 moves away from the first part 110, the second part 120 divides the cavity into a sealed cavity A and a gas storage cavity 140, and the sealed cavity A and the gas storage cavity 140 pass through the second gas storage cavity. Road 112 connects.

The gas storage cavity 140 can be used as a terminal accommodating cavity. For example, in some embodiments, at least part of the cavity wall of the gas storage cavity 140 is made of flexible or elastic material to form an air bag. In this way, the air pump and the air bag can be completely integrated, which greatly simplifies the independent structure of the existing air pump and the air bag, making the volume of the air pump smaller and more conducive to the application of wearable electronic blood pressure monitors.

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 can be discharged into other spaces through the third air channel, such as an air bag.

Further, in order to facilitate the flow of gas, please refer to FIGS. 3 and 4 . In one embodiment, the opposite surfaces a and b of the first component 110 and the second component 120 are both smooth planes.

This embodiment does not show the specific structure of the driving device 130, which can adopt various devices capable of outputting reciprocating motion. This device can directly realize reciprocating linear motion by relying on cylinders, oil cylinders, etc., or can use a motor plus a transmission mechanism. The reciprocating motion can be realized by other means, and other devices for reciprocating motion can also be used.

Embodiment two

This embodiment provides the second air pump.

Please refer to FIGS. 5 and 6 , this embodiment provides a specific structure of the cavity structure 210 . The cavity structure 210 has a cavity, the first part 210b is a part of the cavity structure 210, specifically, the cavity structure 210 includes a cover 210a, a seat 210c and a first part 210b, the seat 210c has a concave The cavity, the cover body 210a and the seat body 210c form a cavity shape, and the first component 210b is installed on the side of the cavity where the cover body 210a is located. The cover 210a and the first part 210b jointly form the first air channel 111, which is used to communicate the external space with the interior of the cavity structure 210, for example, the holes 213, 214, 211 of the cover 210a and the first part 210b communicate to form a first Airway 111. Wherein, the hole 214 of the cover body 210 a forms a recessed portion, and the periphery of the first component 210 b is bonded to the periphery of the recessed portion 214 in an airtight manner. The lid body 210a and the seat body 210c are also airtightly fixed.

In order to reduce noise, in some embodiments, the first air channel 111 has a sound-absorbing cavity. As shown in FIG. 6 , the hole 214 constitutes a sound-absorbing chamber of the first air passage 111 .

Please refer to FIG. 6 , in an embodiment, the second component 220 is installed in the cavity and facing 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.

Please refer to FIGS. 5 and 6 , in this embodiment, the driving device is a moving coil electromagnetic driving device 250 , and the first component 210 b and/or the second component 120 are driven by the moving coil of the moving coil electromagnetic driving device 250 . The moving coil electromagnetic drive device 250 includes a soft iron briquetting block 251 , a permanent magnet 252 , a coil 253 and a permeable magnet 254 .

Further, please refer to FIGS. 5 and 7 , in an embodiment, the elastic member 230 and the second component 220 are fixed together or formed into an integral structure.

Specifically, the second part 220 is a flat body structure, and the elastic member 230 surrounds the flat body and protrudes to the side where the first part 210b is located, so as to connect the first part 210b and the second part when the driving device stops working. 220 pops open.

Further, the elastic member 230 is an elastic piece disposed around the flat body, and one end of the elastic piece protrudes outward from the position of the flat body.

Please refer to FIG. 7 , in an embodiment, there are three elastic pieces, and the three elastic pieces are distributed around the flat body in a substantially circular manner and spaced at the same angle. Each shrapnel is roughly strip-shaped and distributed in an arc.

Of course, in other embodiments, the first component 210b can also be fixed together with the elastic member 230 or be integrated. Similarly, the first part 210b may also include a flat body, and the elastic member 230 surrounds the flat body and protrudes to the side where the second part 220 is located, so as to connect the first part 210b and the second part when the driving device stops working. 220 pops open.

Of course, the structures 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.

Please refer to FIG. 6 , in one embodiment, the second air passage 112 is arranged on the second component, and the third air passage 113 is arranged on the seat 210c, which guide the gas in the sealed cavity A from the bottom of the air pump.

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

As shown in FIG. 6 , in a natural state, the elastic member 230 bears against the first part 210b, so that the second part 220 is separated from the first part 210b.

The moving-coil electromagnetic driving device 250 first drives the second part 220 to move toward the first part 210b and resist the small hole 211 . Thereafter, as shown in FIG. 8 , the moving-coil electromagnetic drive device 250 drives the second part 220 to move rapidly away from the small hole 211, forming a sealed cavity A between the second parts 220 and 210b, and the sealed cavity A The initial air pressure is close to vacuum, and the air flows into the sealed cavity A through the first air channel 111 .

During the return journey, as shown in FIG. 9 , the moving-coil electromagnetic drive device 250 drives the second part 220 to quickly move toward the first part 210b. As the sealed cavity shrinks, part of the gas in the sealed cavity passes through the first air channel 111 After flowing out of the sealed cavity, another part of the gas is discharged to other spaces through the second air channel 112 (part of the gas may enter the cavity structure 210). The above-mentioned process is carried out repeatedly and can complete the inflation process.

When the air pump exhausts, the electromagnetic drive device 250 stops working, the elastic member 230 pushes the second part 220 to move away from the first part 210b and stay at a position away from the first part 210b, and the compressed gas is discharged through the first air channel 111 .

In order to reduce noise, in some embodiments, the third air passage 113 has a sound-absorbing cavity. As shown in FIG. 6 , a muffler chamber 215 is provided on the third air passage 113 to reduce noise.

Embodiment Three

This embodiment provides a third air pump.

10-13, the cavity structure 310 of this embodiment has a cavity, the first part 310b is a part of the cavity structure 310, specifically, the cavity structure 310 includes a cover 310a, a seat 310c and a first Part 310b, the seat body 310c has a concave cavity, the cover body 310a and the seat body 310c form a cavity shape, and the first component 310b is installed on the side of the cavity body where the cover body 310a is located. The cover 310a and the first part 310b jointly form the first air channel 111, which is used to communicate the external space with the interior of the cavity structure 310, for example, the holes 313, 314, 311 of the cover 310a and the first part 310b communicate to form a first Airway 111. Wherein, the hole 314 of the cover body 310 a forms a recessed portion, and the periphery of the first component 310 b is bonded to the periphery of the recessed portion 314 in an airtight manner. The lid body 310a and the seat body 310c are also airtightly fixed.

Please refer to FIG. 11 , in an embodiment, the second component 320 is installed in the cavity and facing 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.

Further, referring to FIGS. 10-13 , in an embodiment, the driving device adopts a moving iron electromagnetic driving device, and the first component 310b and/or the second component 320 are driven by the moving iron of the moving iron electromagnetic driving device. The moving iron electromagnetic drive 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 with the moving iron 353 and moves with the moving iron 353 .

Figures 11-13 are cross-sectional views of the assembly state of this embodiment, wherein as shown in Figure 12, when the moving iron 353 moves downward, the moving iron 353 drives the second part 320 away from the first part 310b, and then the gas enters the first part 310b. In the sealed cavity between the component 310b and the second component 320 . Figure 13 shows that when the moving iron 353 moves upward, the moving iron 353 drives the second part 320 close to the first part 310b, and then part of the gas passes through the first part from the sealed cavity between the first part 310b and the second part 320. The airway 111 exits. The gas collected in the sealed cavity is discharged into other spaces through the second air channel 112 and the third air channel 113 .

Embodiment Four

This embodiment provides a fourth air pump.

14-17, the cavity structure 410 in this embodiment has a cavity, the first part 410b is a part of the cavity structure 410, specifically, the cavity structure 410 includes a cover 410a, a seat 410c, a second A part 410b and a support plate, the seat body 410c has a cavity, the cover body 410a and the seat body 410c form a cavity shape, and the first part 410b is installed on the side of the cavity where the cover body 410a is located. The cover 410a and the first part 410b jointly form the first air channel 111, which is used to communicate the external space with the interior of the cavity structure 410, for example, the holes 413, 414, 411 of the cover 410a and the first part 410b communicate to form a first Airway 111. Wherein, the hole 414 of the cover body 410 a forms a recessed portion, and the periphery of the first component 410 b is bonded to the periphery of the recessed portion 414 in an airtight manner. The lid body 410a and the seat body 410c are also airtightly fixed.

Please refer to FIG. 15 , in an embodiment, the second component 420 is installed in the cavity and facing 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 communicates with the sealed cavity through the second air channel 112 . Meanwhile, the gas storage chamber 140 is also used as an installation chamber, and the driving device is installed in the gas storage chamber 140 .

Further, please refer to FIGS. 15-18 , in an embodiment, the driving device adopts a polymer driving device 450 that can expand and contract when applied with voltage. In addition, in other embodiments, the drive device can be an elastic member drive device that can be stretched by applying a voltage, a polymer drive device that can be stretched by applying a voltage, a piezoelectric device that can be deformed by an applied electric field, or a medium as In the planar capacitive device of the elastic member.

As shown in FIG. 18 , the voltage-applied polymer driver 450 includes an electrode 450b, a polymer 450a, and an electrode 450c. As shown in FIGS. 16 and 18 , after a voltage is applied between the electrodes 450b and 450c, the polymer 450a shrinks and deforms, driving the second component 420 away from the first component 410b. After the voltage is removed, as shown in Figures 17 and 18, the deformation of the polymer 450a disappears, and then resets, driving the second part 420 close to the first part 410b. Finally, this deformation is used to push the mover 420 to move to complete the inflation process.

As shown in FIG. 16 , the inflated gas storage chamber 140 is discharged into other spaces, such as an air bag, through the third air channel 113 .

Embodiment five

This embodiment provides a fifth air pump.

The difference between the air pump shown in the fifth embodiment and the fourth embodiment is:

Please refer to FIG. 19 , in one embodiment, it also includes an intake check valve 531, which is set corresponding to the first air passage 111, so as to make the first air passage 111 one-way seal the cavity air intake.

Further, please refer to FIG. 19 , in one embodiment, an exhaust check valve 532 is also included, and the exhaust check valve 532 is set corresponding to the third air channel 113 to make the third air channel 113 one-way Exhaust from other spaces.

In other embodiments, an exhaust one-way valve may also be disposed on the second air passage 112 to allow the third air passage 113 to exhaust gas into the gas storage chamber 140 in one direction.

Embodiment six

This embodiment provides the sixth air pump.

Please refer to FIG. 20 , in one embodiment, there are at least two second components 620 . Each second component 620 is respectively provided with a first component 610 , or at least two second components 620 are used together corresponding to one first component 610 . That is, one second component 620 can be used correspondingly with one first component 610 , or as shown in FIG. 20 , two or more second components 620 can be used together corresponding to one first component 610 .

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 provided independently or at least partially integrated together.

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.

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 corresponding to one second component 620 . Likewise, the second opening of the first air channel on the first component 610 is independently provided or at least partly integrated together.

As shown in FIG. 20 , when there are more than two second components 620 and/or first components 610 , they can be arranged together in the same cavity structure.

Embodiment seven

This embodiment provides a seventh air pump.

Please refer to Figures 21 and 22, in one embodiment, the air pump includes a cavity structure 710, a first part 710b, a second part 720, a driving device 750 and an air bag 710d, and the driving device 750 drives the second part 720 and the first part 710b is relatively far and relatively close for inflation. The airbag 710d communicates with the second airway 112, and the gas inflated 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. .

Embodiment eight

This embodiment provides an eighth air pump.

In one embodiment, the driving device drives the first part to move. Specifically, please refer to FIG. 23 , it also includes a cavity structure 810, the second component 830 is fixedly disposed in the cavity structure 810, and the first component 820 is opposite to the second component 830 and is movably disposed in the cavity structure 810. Inside.

Further, please continue to refer to FIG. 23. In one embodiment, the first component 820 is installed on the elastic mounting seat 840, and the driving device 850 drives the elastic mounting seat 840 to partially deform. As shown in FIG. 23, the driving device 850 drives The middle part of the elastic mounting seat 840 is deformed to make the first part 820 and the second part 830 move relative to each other to form a sealed cavity.

The elastic mount 840 is fixed on the cavity structure 810 , and an opening is provided in the middle of the elastic mount 840 to communicate with the first component 820 . The gas inhaled from the first airway 111 is discharged into other spaces through the second airway 112 and the third airway 113 .

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.

Embodiment nine

This embodiment provides a ninth air pump.

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.

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 part or the second part to move.

Embodiment ten

This embodiment provides a tenth air pump.

The air pump uses different drives. The driving device adopts an electrode combination structure that attracts each other after voltage is applied, and moves the first part and the second part relatively close to and relatively far apart by applying and removing the voltage.

Please refer to FIGS. 25 and 26 , in an embodiment, the electrode combination structure includes a first electrode 1010 a and a second electrode 1021 . The first electrode 1010a is the first component of this embodiment. The first electrode 1010a and the casing 1010c enclose a cavity, and the cavity has a first air channel 1011 and a third air channel 1013 for communicating with other spaces. The second component is an elastic body structure 1022 , and the second electrode 1021 and the elastic body structure 1022 are bonded together to form an electrode assembly 1020 . The elastomeric structure 1022 divides the cavity into a sealed cavity A and a gas storage cavity B.

In some embodiments, a spacer 1010b is provided between the elastic body structure 1022 and the first electrode 1010a to isolate it. The gasket 1010b, the shell 1010c and the elastomer structure 1022 are insulators so as not to affect the movement of the electrode assembly structure.

During the working process, 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 a part of the gas in the sealed cavity A Enter the gas storage chamber B through the second air channel 1012, and part of it is discharged through the first air channel 1011; when the voltage applied between the first electrode 1010a and the second electrode 1021 is removed, the electrode assembly 1020 acts on the elastic force of the elastic body structure 1022 Next, away from the first electrode 1010a, the volume of the sealed cavity A expands, and outside air enters the sealed cavity A through the first air channel 1011 . The above actions are repeated, and the external air is sucked into the gas storage chamber B to form compressed gas. The compressed gas is output through the third air channel 1013.

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

In other embodiments, the first electrode and the second electrode may also be provided separately, instead of 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 applying a voltage, the first component or the second component is an elastic body structure, and the first electrode or the second electrode and the elastic body structure Install as one.

Embodiment Eleven

This embodiment provides an eleventh air pump.

The air pump uses different drives. The driving device also adopts an electrode combination structure that attracts each other after applying a voltage, and moves the first part and the second part relatively close to and relatively far apart by applying and removing the voltage.

Wherein, one of the first component and the second component itself is designed as a first electrode, and the other of the first component and the second component is an elastic body structure, and the second electrode is arranged on the elastic body structure. In addition, a third electrode is included, the second electrode and the elastomeric structure are disposed between the first electrode and the third electrode

Please refer to FIGS. 27 and 28 , in an embodiment, the electrode combination structure includes a first electrode 1110 a , a second electrode 1121 and a third electrode 1130 . Wherein, the first electrode 1110a is the first component of this embodiment, the first electrode 1110a and the casing 1110c enclose a cavity, the cavity has a first air channel 1111 and a third air channel 1113 for communicating with other spaces . The second component is an elastic body structure 1122 , and the second electrode 1121 and the elastic body structure 1122 are bonded together to form an electrode assembly 1120 . Wherein, there may be two elastic body structures 1122 sandwiching the second electrode 1121 in between. The elastomeric structure 1122 divides the cavity into a sealed cavity A and a gas storage cavity B.

In some embodiments, a spacer 1110b is provided between the elastic body structure 1122 and the first electrode 1110a for isolation. The gasket 1110b, the shell 1110c and the elastomer structure 1122 are insulators so as not to affect the movement of the electrode assembly structure.

A voltage is applied between the third electrode 1130 and the first electrode 1110a, for example, the third electrode 1130 is positive, and the first electrode 1110a is negative (grounded). During the working process, 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, and the cavity A is sealed Part of the gas in the gas enters the gas storage chamber B through the second gas channel 1112, and part of it 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, and the electrode The assembly 1120 approaches the third electrode 1130 , and the electrode assembly 1120 moves away from the first electrode 1110 a, the volume of the sealed cavity A expands, and outside air enters the sealed cavity A through the first air channel 1111 . The above actions are repeated, and the external air is sucked into the gas storage chamber B to form compressed gas. The compressed gas is then exported through the third air channel 1113 .

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

Embodiment 12

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

Please refer to FIG. 29 , in an embodiment, the air pump shown in Embodiment 1 is used as an example for illustration. The two air pumps are connected in series sequentially, so that the third air channel 113 of the previous air pump is connected with the first air channel 111 of the latter air pump, so as to increase the output pressure of the compressed gas.

Embodiment Thirteen

The thirteenth embodiment provides a sphygmomanometer, which includes an air pump as shown in any one of the above embodiments, to inflate and deflate;

Or, it includes a combined air pump as shown in Embodiment 12 to inflate and deflate.

Embodiment Fourteen

The fourteenth embodiment provides a medical device, which includes an air pump as shown in any one of the above embodiments, to inflate and deflate;

Or, it includes a combined air pump as shown in Embodiment 12 to inflate and deflate.

The above content is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. Those of ordinary skill in the technical field to which the present invention belongs can also make some simple deduction or replacement without departing from the concept of the present invention.

Claims (37)

1. An air pump, characterized in that, comprising: first part; a second part, the second part is arranged opposite to the first part; And a driving device, the driving device drives at least one of the first part and the second part, so that the first part and the second part can complete the actions of being relatively far away and relatively close alternately; The first part and the second part have a connection structure that enables them to 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 for communicating with the external space. The second air channel connected to the gas storage chamber, the first air channel passes through the first part, and the first air channel opens at one end facing the second part as a first opening, and the first air channel faces the outer space The opening at one end is the second opening, and the area of the side of the second member 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 member falls on the surface facing the first opening. on one side; The driving device drives the first part and the second part to repeatedly and alternately move away from and close to each other, so that the gas in the external space can enter the sealed cavity from the first air passage, and then enter the gas storage cavity. 2. The air pump according to claim 1, wherein the switching of the first part and the second part from moving away from each other to moving closer to each other is performed when the air pressure in the sealed cavity is lower than the air pressure in the gas storage chamber, Or it is carried out at the instant when the air pressure in the sealed cavity reaches the air pressure in the gas storage chamber. 3. The air pump according to claim 1, wherein the switching of the first part and the second part from moving away from each other to moving closer to each other is performed when the air pressure in the sealed cavity is lower than the air pressure in the external space, or It is carried out 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 there is an elastic member between the first part and the second part for keeping the first part and the second part apart or close to each other. 5. The air pump according to claim 4, wherein the elastic member forms an integral structure with the first part or the second part. 6. The air pump according to claim 4, wherein the second part comprises a flat body, and the elastic member surrounds the flat body and protrudes toward the side where the first part is located, so as to be used when the driving device stops working When the first part and the second part are popped apart. 7. The air pump according to claim 4, wherein the first part comprises a flat body, and the elastic member surrounds the flat body and protrudes toward the side where the second part is located, so as to be used when the driving device stops working When the first part and the second part are popped apart. 8. The air pump according to claim 6 or 7, wherein the elastic member is a shrapnel arranged around the flat body, and one end of the shrapnel protrudes outward from the position of the flat body. 9 . The air pump according to claim 8 , wherein there are three or more elastic pieces, and the elastic pieces are distributed around the flat body in a substantially circular manner and spaced at the same angle. 10. The air pump according to claim 1, characterized in that, the state of the first member and the second member being attached to each other serves as the starting point of the relative distance movement. 11. The air pump according to any one of claims 1-10, wherein the driving device outputs a reciprocating linear motion, and the second component is driven by the driving device. 12. The air pump of claim 11, comprising a cavity structure having a cavity, the first component being part of the cavity structure, and the second component being mounted within the cavity And set 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, so The sealed cavity communicates with the gas storage cavity through the second air channel. 14. The air pump according to claim 13, wherein 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 air channel for conducting gas to other spaces. 16. The air pump according to claim 11, characterized in that it comprises a cavity structure, the first part and the second part are respectively a part of the cavity structure, and the second part is movably arranged facing the first part. 17. The air pump of claim 11, comprising a cavity structure having a cavity, the first component being part of the cavity structure, and the second component being mounted within the cavity And set facing the first component; the second component divides the cavity into an installation cavity, and the driving device is installed in the installation cavity. 18. The air pump according to any one of claims 1-10, wherein the driving device outputs a reciprocating linear motion, and the first component is driven by the driving device. 19. The air pump according to claim 18, further comprising a cavity structure, the second part is fixedly arranged in the cavity structure, and the first part is opposite to the second part and is movably arranged in the inside the cavity structure. 20. The air pump according to claim 18, wherein the first component is installed 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 relatively And the sealed cavity is formed. 21. The air pump according to any one of claims 1-20, characterized in that, the driving device adopts a moving coil electromagnetic driving device, and the first part and/or the second part are driven by the moving coil electromagnetic driving device. The moving coil of the driving device is driven. 22. The air pump according to any one of claims 1-20, characterized in that, the driving device adopts a moving iron electromagnetic driving device, and the first part and/or the second part are driven by the moving iron electromagnetic The moving iron of the device is driven. 23. The air pump according to any one of claims 1-20, characterized in that, the driving device is an elastic member driving device that can be expanded and contracted by applying a voltage, a polymer driving device that can be expanded and contracted by applying a voltage, or an electric field is applied A device capable of deforming. 24. The air pump according to any one of claims 1-20, characterized in that, the driving device adopts an electrode combination structure that attracts each other after applying a voltage, and the first part and the second part are made to be connected by applying and removing the voltage Relatively close and relatively far away movements. 25. The air pump according to claim 24, wherein one of the first part and the second part itself is designed as a first electrode, and the other of the first part and the second part is an elastomeric structure , the elastic body structure is provided with a second electrode. 26. The air pump according to claim 24, wherein one of the first part and the second part itself is designed as a first electrode, and the other of the first part and the second part is an elastomeric structure , the elastic body structure is provided with a second electrode, and also includes a third electrode, and the second electrode and the elastic body structure are arranged between the first electrode and the third electrode. 27. The air pump according to any one of claims 1-26, further comprising an air bag, and the air bag communicates with the second air channel for inflating and deflated air into the air bag. 28. The air pump according to any one of claims 1-27, characterized in that there is a sound-absorbing cavity in the first air passage. 29. The air pump according to any one of claims 1-28, characterized in that there is a sound-absorbing cavity in the second air passage. 30. The air pump according to any one of claims 1-29, wherein there are at least two first components; each of the first components is respectively provided with a second component, or there are at least two The first part is used in correspondence with one second part; the second openings of the first air passages on all the first parts are set independently or at least partly integrated together. 31. The air pump according to any one of claims 1-30, characterized in that there are at least two second components; each of the second components is respectively provided with a first component, or there are at least two The second parts are commonly used corresponding to a first part; each of the second parts is correspondingly provided with a first opening of a first air channel, and the second openings of the first air channel on all first parts are independently provided or at least partially integrated together. 32. The air pump according to any one of claims 1-31, further comprising an air intake check valve, the intake check valve is set corresponding to the first air passage, so as to make the first air passage one-way Into the air into the sealed cavity. 33. The air pump according to any one of claims 1-32, further comprising an exhaust one-way valve, the exhaust one-way valve is set corresponding to the third airway, in order to make the third airway one-way Exhaust to other spaces. 34. The air pump according to any one of claims 1-33, wherein the opposite surfaces of the first member and the second member are smooth planes. 35. A combined air pump, characterized in that it comprises at least two air pumps according to claims 1-34, and all the air pumps are sequentially connected in series. 36. A sphygmomanometer, characterized in that it comprises the air pump according to any one of claims 1-34, used for inflation and deflation; Or, comprise the combination air pump as claimed in claim 35, in order to inflate and deflate. 37. A medical device, characterized in that it comprises the air pump according to any one of claims 1-34, which is used to inflate and deflate; Or, comprise the combination air pump as claimed in claim 35, in order to inflate and deflate.