Driving device and liquid-gas mixing pump

Abstract

The invention discloses a driving device and a liquid-gas mixing pump, and relates to the technical field of liquid-gas mixing pumps.The driving device comprises a driving motor, an extrusion part, a transmission structure and at least one leather cup body, and the driving motor is provided with an output shaft extending in the first direction; the extrusion part can move along a first direction relative to the output shaft; the transmission structure is arranged between the output shaft and the extrusion part and is used for driving the extrusion part to do reciprocating motion in the first direction when the output shaft rotates; the at least one leather cup body is arranged at one end, far away from the driving motor in the first direction, of the extrusion part; and the extrusion piece moves in the first direction and can extrude or release the leather cup body. According to the technical scheme, the leather cup body can be repeatedly extruded in a translational motion mode, and the leather cup body is even in stress and not prone to damage.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid-gas mixing pumps, and particularly to a driving device and a liquid-gas mixing pump. Background Art

[0002] A liquid-gas mixing pump generally realizes the extraction of liquid or gas through the reciprocating compression and relaxation of a leather bowl body. When the leather bowl body relaxes, it sucks liquid or gas into the interior of the leather bowl body. When the leather bowl body is compressed, it squeezes and discharges the liquid or gas from the interior of the leather bowl body.

[0003] In the existing liquid-gas mixing pump, an eccentric wheel is provided at the output end of the motor. When the eccentric wheel rotates with the motor, it drives the compression chamber of the leather bowl body to compress and relax. However, when the leather bowl body compresses and relaxes, it always reciprocally deforms toward the central side, and uneven stress easily causes damage. Summary of the Invention

[0004] The main object of the present invention is to propose a driving device and a liquid-gas mixing pump, aiming to at least solve the technical problem that the leather bowl body is easily damaged due to uneven stress in the related art.

[0005] To achieve the above object, the driving device proposed by the present invention, which is applied to a liquid-gas mixing pump, includes:

[0006] A driving motor having an output shaft extending in a first direction;

[0007] An extrusion member that is movable relative to the output shaft along the first direction;

[0008] A transmission structure disposed between the output shaft and the extrusion member for driving the extrusion member to reciprocally move along the first direction when the output shaft rotates; and,

[0009] At least one leather bowl body provided at one end of the extrusion member away from the driving motor in the first direction;

[0010] Wherein, when the extrusion member moves along the first direction, it can extrude or release the leather bowl body.

[0011] In an embodiment, the driving device further includes a limiting structure disposed between the extrusion member and the leather bowl body to limit the movement of the extrusion member and the leather bowl body in the radial direction of the output shaft.

[0012] In an embodiment, a limiting convex portion protrudes from the middle of the side of the leather bowl body facing the extrusion member, and a limiting groove adapted to the limiting convex portion is provided at one end of the extrusion member facing the leather bowl body;

[0013] The limiting structure includes the limiting convex portion and the limiting groove.

[0014] In one embodiment, a plurality of cup bodies are provided, and a plurality of corresponding extrusion members are provided;

[0015] The driving device further includes a connecting disk connected to the plurality of extrusion members, and the connecting disk is movable relative to the output shaft in a first direction;

[0016] Wherein, the transmission structure is arranged between the output shaft and the connecting disk, and is used for driving the connecting disk to move in the first direction when the output shaft rotates, so as to drive the plurality of extrusion members to move in the first direction.

[0017] In one embodiment, the plurality of cup bodies are circumferentially distributed along the output shaft, and the connecting disk is sleeved on the outer peripheral side of the output shaft.

[0018] In one embodiment, the connecting disk is also movably arranged relative to the extrusion member in the first direction;

[0019] The driving device further includes a fixing structure arranged between the connecting disk and the extrusion rod, and the fixing structure has a fixed state when powered on and a released state when powered off;

[0020] In the fixed state, the connecting disk and the extrusion rod are fixedly connected;

[0021] In the released state, the connecting disk is movable relative to the extrusion member in the first direction.

[0022] In one embodiment, the fixing structure includes an electromagnet and a magnetic matching part respectively arranged on the connecting disk and the extrusion rod.

[0023] In one embodiment, the electromagnet and the magnetic matching part are magnetically matched in the first direction.

[0024] In one embodiment, the transmission structure includes a complete circle of guide grooves, rolling parts and connecting parts. The guide grooves are arranged on the outer peripheral side of the output shaft, and there is a distance difference between the guide grooves and the extrusion rod in the first direction. The rolling parts are arranged in the guide grooves and are rotationally connected to the connecting parts along the radial direction of the output shaft, and the connecting parts are connected to the extrusion rod.

[0025] The present invention also provides a liquid-gas mixing pump, including:

[0026] A pump base, on which a liquid inlet, a gas inlet and a liquid outlet are provided. The interior of the pump base is divided into a liquid inlet chamber, a gas inlet chamber and a liquid outlet chamber. The liquid inlet chamber is communicated with the liquid inlet, the liquid outlet chamber is communicated with the liquid outlet, and the gas inlet chamber is communicated with the gas inlet; and,

[0027] A driving device is provided on the pump base, and the driving device is the above-mentioned driving device;

[0028] Wherein, the leather cup body is formed with a compression cavity, the liquid inlet cavity and the air inlet cavity communicate with the compression cavity, and the liquid outlet cavity communicates with the compression cavity.

[0029] In the technical solution of the present invention, the driving device includes a driving motor, an extrusion member, a transmission structure and at least one leather cup body. The transmission structure is arranged between the output shaft and the extrusion member to drive the extrusion member to reciprocate along a first direction when the output shaft rotates. With such a setting, when it is necessary to repeatedly extrude and release the leather cup body, the driving motor is started to make the output shaft rotate. Through the setting of the transmission structure, the rotation of the output shaft is converted into the reciprocating motion of the extrusion member along the first direction. In this way, the leather cup body can be repeatedly extruded in a translational manner, and the leather cup body is uniformly stressed and not easily damaged. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0031] Figure 1 It is a schematic structural diagram of an embodiment of the driving device provided by the present invention;

[0032] Figure 2 For Figure 1 The partial enlarged view at A in

[0033] Figure 3 It is a schematic structural diagram of an embodiment of the liquid-gas mixing pump provided by the present invention.

[0034] Explanation of the Reference Numerals in the Drawings:

[0035] 1000, liquid-gas mixing pump; 100, driving device; 1, driving motor; 11, output shaft; 2, extrusion member; 3, transmission structure; 31, guiding groove; 32, rolling part; 33, connecting part; 4, leather cup body; 5, limiting structure; 51, limiting convex part; 52, limiting groove; 6, connecting disc; 7, fixing structure; 71, electromagnet; 72, magnetic matching part; 200, pump base; 201, liquid inlet; 202, air inlet; 203, liquid outlet.

[0036] The realization, functional characteristics and advantages of the object of the present invention will be further described with reference to the embodiments and the drawings. Detailed Embodiments

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0040] A liquid-gas mixing pump generally realizes the extraction of liquid or gas through the reciprocating compression and relaxation of a leather cup body. When the leather cup body relaxes, it inhales the liquid or gas into the inside of the leather cup body, and when the leather cup body compresses, it squeezes and discharges the liquid or gas from the inside of the leather cup body.

[0041] In the existing liquid-gas mixing pump, an eccentric wheel is provided at the output end of the motor. The leather cup body is connected to the eccentric wheel through a swing frame, and the connecting rod of the swing frame is movably connected to the eccentric wheel. When the eccentric wheel rotates with the motor, the eccentric wheel drives the swing part to cycle and shift, so as to drive the compression chambers of the leather cup body to compress and relax in sequence. However, in the existing liquid-gas mixing pump, when the leather cup body compresses and relaxes, it always reciprocally deforms towards one side of the center of the swing frame, and the uneven force is likely to cause damage.

[0042] The main purpose of the present invention is to propose a driving device and a liquid-gas mixing pump, aiming to at least solve the technical problem that the leather cup body is easily damaged due to uneven force in the related art.

[0043] Please refer to Figures 1 to 3In one embodiment of the present invention, the driving device 100 is applied to a liquid-gas mixing pump 1000, including a driving motor 1, an extrusion member 2, a transmission structure 3 and at least one leather cup body 4, wherein the driving motor 1 has an output shaft 11 extending along a first direction; the extrusion member 2 can move along the first direction relative to the output shaft 11; the transmission structure 3 is arranged between the output shaft 11 and the extrusion member 2, and is used to drive the extrusion member 2 to reciprocate along the first direction when the output shaft 11 rotates; the at least one leather cup body 4 is arranged at one end of the extrusion member 2 away from the driving motor 1 in the first direction; wherein the extrusion member 2 can squeeze or release the leather cup body 4 when it moves along the first direction.

[0044] In the technical solution of the present invention, the drive device 100 includes a drive motor 1, an extrusion member 2, a transmission structure 3, and at least one leather cup body 4. The transmission structure 3 is disposed between the output shaft 11 and the extrusion member 2, and is used to drive the extrusion member 2 to reciprocate along a first direction when the output shaft 11 rotates. With this arrangement, when the leather cup body 4 needs to be repeatedly squeezed and released, the drive motor 1 is started to rotate its output shaft 11. Through the arrangement of the transmission structure 3, the rotation of the output shaft 11 is converted into reciprocating motion of the extrusion member 2 along the first direction. In this way, the leather cup body 4 can be repeatedly squeezed in a translational manner, and the leather cup body 4 is evenly stressed and not easily damaged.

[0045] It is understandable that although the extrusion member 2 repeatedly squeezes the leather cup body 4 by means of translation, the leather cup body 4 itself recovers through elasticity. If the frequency of the leather cup body 4 recovery is different from the frequency of the movement of the extrusion member 2 along the first direction, there may be a problem that the extrusion point of the extrusion member 2 on the leather cup body 4 is offset, thereby causing the leather cup body 4 to be subjected to uneven force. To this end, in an embodiment of the present invention, the driving device 100 also includes a limiting structure 5, which is disposed between the extrusion member 2 and the leather cup body 4 to limit the movement of the extrusion member 2 and the leather cup body 4 in the radial direction of the output shaft 11. By limiting the movement of the extrusion member 2 and the leather cup body 4 in the radial direction of the output shaft 11, when the extrusion member 2 moves in the first direction, that is, the axial direction of the output shaft 11, it is possible to ensure that the extrusion point is at the same position as much as possible, thereby improving the uniformity of the extrusion of the leather cup body 4.

[0046] The limiting structure 5 has various forms. In some embodiments, a limiting convex portion 51 protrudes from the middle of the side of the leather cup body 4 facing the pressing member 2, and a limiting groove 52 adapted to the limiting convex portion 51 is provided at one end of the pressing member 2 facing the leather cup body 4; the limiting structure 5 includes the limiting convex portion 51 and the limiting groove 52. By protruding a limiting convex portion 51 from the middle of the leather cup body 4 and correspondingly providing the limiting groove 52 on the pressing member 2, the cooperation between the limiting groove 52 and the limiting convex portion 51 can limit the movement of the pressing member 2 and the leather cup body 4 in the radial direction of the output shaft 11, and at the same time, it will not affect the release of the pressing member 2. In some embodiments, it may also be that a limiting groove 52 is formed by concave inward in the middle of the side of the leather cup body 4 facing the pressing member 2, and the pressing member 2 is provided with the limiting convex portion 51. In comparison, setting the limiting convex portion 51 on the leather cup body 4 has a better effect because when the limiting convex portion 51 is set on the leather cup body 4, the limiting convex portion 51 does not need to participate in deformation, that is, it can ensure the cooperation with the limiting groove 52 on the pressing member 2, and the stability is higher.

[0047] The leather cup body 4 can be one, two or even more. It can be understood that the more the number of the leather cup bodies 4, the larger the overall flow rate when applied to the liquid-gas mixing pump 1000. At the same time, in some application scenarios, the accuracy requirement for the liquid-gas mixing ratio is very high. Increasing the number of the leather cup bodies 4 can, through reasonable design, make each leather cup body 4 responsible for a specific liquid-gas inhalation and discharge amount, which helps to more precisely control the liquid-gas mixing ratio. For example, in some fine chemical experiments or production processes, it is required that the error of the liquid-gas mixing ratio be controlled within a very small range. The pump with multiple leather cup bodies 4 can achieve more precise mixing by separately controlling the working states of different leather cup bodies 4.

[0048] In this embodiment, a plurality of leather cup bodies 4 are provided, and a plurality of pressing members 2 are correspondingly provided; the driving device 100 further includes a connecting disk 6 connected to the plurality of pressing members 2, and the connecting disk 6 can move along a first direction relative to the output shaft 11; wherein, the transmission structure 3 is arranged between the output shaft 11 and the connecting disk 6 to drive the connecting disk 6 to move along the first direction when the output shaft 11 rotates, so as to drive the plurality of pressing members 2 to move along the first direction. Thus, in use, the output shaft 11 of the driving motor 1 rotates, and under the action of the transmission structure 3, the connecting disk 6 is driven to reciprocate along the first direction, and then the plurality of pressing members 2 are simultaneously driven to reciprocate along the first direction, and finally a plurality of leather cup bodies 4 are simultaneously squeezed or released.

[0049] When multiple cup bodies 4 are provided, if the power distribution is uneven, it will also affect the normal operation of the pump. Therefore, in the embodiments of the present invention, the multiple cup bodies 4 are circumferentially distributed along the output shaft 11, and the connecting disk 6 is sleeved on the outer peripheral side of the output shaft 11. Circumferentially distributing the multiple cup bodies 4 along the output shaft 11 makes the distribution of the multiple cup bodies 4 more uniform. In this way, the extrusion force received by each cup body 4 will also be more uniform. The connecting disk 6 is sleeved on the outer peripheral side of the output shaft 11, and the movement of the connecting disk 6 in the first direction and the rotation of the output shaft 11 will not interfere with each other, and it can also make the overall structure more compact.

[0050] Further, the multiple cup bodies 4 are equidistantly distributed along the circumference of the output shaft 11.

[0051] In the related art, when multiple cup bodies 4 are provided in the pump, the multiple cup bodies 4 work simultaneously, which will cause the driving motor 1 to output a large amount of power, and considerable vibration and noise will be generated during use. When the application scenario has a low demand for flow rate, such as a small gas-liquid mixing experiment device or an oxygenation device for a small aquarium, it is not suitable, which limits the use scenario.

[0052] Therefore, in the embodiments of the present invention, the connecting disk 6 is also movably arranged relative to the pressing member 2 in the first direction; the driving device 100 further includes a fixing structure 7 provided between the connecting disk 6 and the pressing rod. The fixing structure 7 has a fixed state when powered on and a released state when powered off; in the fixed state, the connecting disk 6 and the pressing rod are fixedly connected; in the released state, the connecting disk 6 can move relative to the pressing member 2 in the first direction.

[0053] In the technical solution of the embodiment, the connection state between the connecting disk 6 and the pressing rod can be switched through the fixing structure 7. When powered on, the fixing structure 7 is in the fixed state, that is, the connecting disk 6 and the corresponding pressing rod are fixed. When the output shaft 11 rotates, the connecting disk 6 will still drive the pressing rod to move in the first direction, thereby squeezing and releasing the corresponding cup body 4; when powered off, the fixing structure 7 is in the released state, and the connecting disk 6 can move relative to the pressing member 2 in the first direction. When the output shaft 11 rotates, the connecting disk 6 will not drive the pressing rod to move in the first direction, and the corresponding pressing member 2 will not be squeezed, that is, among the multiple cup bodies 4, one does not need a force to squeeze, which can reduce the output power of the driving motor 1, and thus can reduce the vibration and noise of the driving motor 1.

[0054] In this way, the number of the plurality of leather cup bodies 4 used can be adjusted according to the demand of the flow rate used, and the application range is wide. When the application scenario is a small laboratory gas-liquid mixing experimental device or an oxygenation device for a small aquarium, one of the leather cup bodies 4 can be selected to work; for some small industrial devices or household devices with certain requirements for flow rate and stability, such as small cleaning machines and small spraying devices, two of the leather cup bodies 4 can be used to work; in large-scale chemical production, a large amount of stable gas-liquid mixing medium is required to participate in the reaction, and three or more of the leather cup bodies 4 can be used to meet the production requirements of such large scale and high requirements. In agricultural irrigation, when injecting air into irrigation water to increase the oxygen content, a pump with three or more of the leather cup bodies 4 is also used to achieve efficient gas-liquid mixing and transportation.

[0055] The fixed structure 7 has various forms. In this embodiment, the fixed structure 7 includes an electromagnet 71 and a magnetic matching part 72 respectively arranged on the connecting disk 6 and the extrusion rod; when the fixed structure 7 is in the unlocking state and needs to be switched to the fixed state, the electromagnet 71 is energized. When the connecting disk 6 moves relative to the extrusion rod to a certain position, the electromagnet 71 can be adsorbed to the magnetic matching part 72, so as to fix the connecting disk 6 and the extrusion rod, and the connecting disk 6 can drive the extrusion rod to move. The fixed structure 7 is not limited to this. In another embodiment, the fixed structure 7 can adopt the form of an electro-suction cup, and the electro-suction cup can be arranged on either the connecting disk 6 or the extrusion rod.

[0056] There are also various cooperation methods between the electromagnet 71 and the magnetic matching part 72. Refer to the appendix Figure 1 , when the connecting disk 6 is sleeved on the outer peripheral side of the extrusion rod through a hole, one of the electromagnet 71 and the magnetic matching part 72 is arranged on the inner wall of the hole of the connecting disk 6, and the other is arranged on the outer peripheral side of the extrusion rod. In this embodiment, the electromagnet 71 and the magnetic matching part 72 are magnetically matched in the first direction.

[0057] The purpose of the transmission structure 3 is to convert the rotation of the output shaft 11 into the reciprocating motion of the extrusion rod in the first direction. In an embodiment of the present invention, the transmission structure 3 includes a full-circle guide groove 31, a rolling part 32, and a connecting part 33. The guide groove 31 is provided on the outer peripheral side of the output shaft 11, and there is a distance difference between the guide groove 31 and the extrusion rod in the first direction. The rolling part 32 is arranged in the guide groove 31 and is rotationally connected to the connecting part 33 along the radial direction of the output shaft 11, and the connecting part 33 is connected to the extrusion rod. Thus, when the output shaft 11 rotates, the rolling part 32 does not follow the rotation of the output shaft 11 but moves along the guide groove 31. Since there is a distance difference between the guide groove 31 and the extrusion rod in the first direction, the rolling part 32 will reciprocate in the first direction, and then drive the extrusion rod to reciprocate in the first direction through the connecting part 33, realizing the reciprocating extrusion and release of the leather cup body 4.

[0058] Specifically, when the connecting disk 6 is provided, the connecting part 33 is directly fixedly connected to the connecting disk 6, and the extrusion rod is driven to move through the connecting disk 6.

[0059] Of course, the transmission structure 3 is not limited to this, and it can also be a crank-slider structure, a crank-oscillating block structure, etc.

[0060] The present invention also proposes a liquid-gas hybrid pump 1000, which includes a driving device 100. The specific structure of the driving device 100 refers to the above embodiments. Since the liquid-gas hybrid pump 1000 adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here. Among them, the liquid-gas hybrid pump 1000 further includes a pump base 200. The pump base 200 is provided with a liquid inlet 201, a gas inlet 202, and a liquid outlet 203. The interior of the pump base 200 is partitioned into a liquid inlet chamber, a gas inlet chamber, and a liquid outlet chamber. The liquid inlet chamber is communicated with the liquid inlet 201, the liquid outlet chamber is communicated with the liquid outlet 203, the gas inlet chamber is communicated with the gas inlet 202, the leather cup body 4 forms a compression chamber, the liquid inlet chamber and the gas inlet chamber are communicated with the compression chamber, and the liquid outlet chamber is communicated with the compression chamber.

[0061] In the technical solution of the present invention, when it is necessary to repeatedly squeeze and release the leather cup body 4, the driving motor 1 is started to rotate its output shaft 11. Through the arrangement of the transmission structure 3, the rotation of the output shaft 11 is converted into the reciprocating motion of the squeezing member 2 in the first direction. In this way, the leather cup body 4 can be repeatedly squeezed in a translational manner, and the leather cup body 4 is evenly stressed and not easily damaged. The repeated squeezing and releasing of the leather cup body 4 will cause the air pressure in the compression chamber to change, and then the liquid is sucked into the intake chamber through the liquid inlet 201, and the gas is sucked into the intake chamber through the air inlet 202. Subsequently, after being mixed in the liquid outlet chamber, it is discharged from the liquid outlet 203.

[0062] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A driving device, applied to a liquid-gas mixing pump, characterized in that Comprising: A driving motor having an output shaft extending in a first direction; An extrusion member movable relative to the output shaft in the first direction; A transmission structure disposed between the output shaft and the extrusion member for driving the extrusion member to reciprocate in the first direction when the output shaft rotates; And, At least one leather cup body provided at one end of the extrusion member away from the driving motor in the first direction; Wherein, when the extrusion member moves in the first direction, it can extrude or release the leather cup body.

2. The drive device according to claim 1, characterized in that, The driving device further includes a limiting structure disposed between the extrusion member and the leather cup body to limit the movement of the extrusion member and the leather cup body in the radial direction of the output shaft.

3. The drive device according to claim 2, characterized in that, A limiting convex portion protrudes from the middle of the side of the leather cup body facing the extrusion member, and a limiting groove adapted to the limiting convex portion is provided at one end of the extrusion member facing the leather cup body; The limiting structure includes a limiting convex portion and a limiting groove.

4. The drive device according to claim 1, characterized in that, A plurality of the leather cup bodies are provided, and a plurality of the extrusion members are correspondingly provided; The driving device further includes a connection disk connected to the plurality of extrusion members, and the connection disk is movable relative to the output shaft in the first direction; Wherein, the transmission structure is disposed between the output shaft and the connection disk for driving the connection disk to move in the first direction when the output shaft rotates, so as to drive the plurality of extrusion members to move in the first direction.

5. The drive device according to claim 4, characterized in that, The plurality of leather cup bodies are circumferentially distributed along the output shaft, and the connection disk is sleeved on the outer peripheral side of the output shaft.

6. The drive device according to claim 4, characterized in that, The connection disk is also movably provided relative to the extrusion member in the first direction; The driving device further includes a fixing structure disposed between the connection disk and the extrusion rod, and the fixing structure has an energized fixed state and a de-energized unfixed state; In the fixed state, the connection disk and the extrusion rod are fixedly connected; In the unfixed state, the connection disk is movable relative to the extrusion member in the first direction.

7. The drive device according to claim 6, characterized in that The fixing structure includes an electromagnet and a magnetic matching portion respectively provided on the connection disk and the extrusion rod.

8. The drive device according to claim 7, characterized in that, The electromagnet and the magnetic matching portion are magnetically matched in the first direction.

9. The drive device according to claim 1, characterized in that, The transmission structure includes a complete-circle guide groove, a rolling portion and a connection portion. The guide groove is provided on the outer peripheral side of the output shaft, and there is a distance difference between the guide groove and the extrusion rod in the first direction. The rolling portion is provided in the guide groove and is rotationally connected to the connection portion along the radial direction of the output shaft, and the connection portion is connected to the extrusion rod.

10. A liquid-gas mixing pump, characterized in that, Comprising: A pump base, on which a liquid inlet, a gas inlet and a liquid outlet are provided. The interior of the pump base is divided into a liquid inlet chamber, a gas inlet chamber and a liquid outlet chamber. The liquid inlet chamber is communicated with the liquid inlet, the liquid outlet chamber is communicated with the liquid outlet, and the gas inlet chamber is communicated with the gas inlet; and, A driving device disposed on the pump base, and the driving device is the driving device according to any one of claims 1 to 9; Wherein, the leather cup body forms a compression chamber, and the liquid inlet chamber and the gas inlet chamber are communicated with the compression chamber, and the liquid outlet chamber is communicated with the compression chamber.

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