Driving assembly and milk sucking device

Abstract

The utility model provides a driving assembly and a milk sucking device. The drive assembly includes a pump assembly and a cover. An air cavity is formed in the pump assembly, and the cover is connected with the pump assembly and comprises an air inlet structure and an air outlet structure. A gas distribution cavity is defined by the pump assembly and the cover, the gas inlet structure is communicated with the gas cavity, the gas outlet structure is communicated with the gas distribution cavity, and the gas distribution cavity is communicated with the gas cavity. The volume of the gas distribution cavity is greater than that of the gas outlet structure. By arranging the gas distribution cavity in the driving assembly, the speed of discharging the gas from the driving assembly can be reduced, the noise generated when the gas is discharged is reduced, and the user experience is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of breast pumps, and in particular, to a driving component and a breast milk pumping device. Background Art

[0002] The breast milk pumping devices in the related art generate relatively large noise during use, which affects the user experience. Summary of the Utility Model

[0003] The present disclosure provides a driving component and a breast milk pumping device, which reduce the noise generated when gas is discharged.

[0004] According to a first aspect of the present disclosure, a driving component is provided, which includes a pump component and a cover. An air cavity is formed inside the pump component, the cover is connected to the pump component, and the cover includes an air inlet structure and an air outlet structure. The pump component and the cover enclose a gas distribution cavity, the air inlet structure is communicated with the air cavity to provide an air inlet flow path when the pump component sucks air, the air outlet structure is communicated with the gas distribution cavity, and the gas distribution cavity is communicated with the air cavity to provide a channel for gas to be discharged from the pump component. The volume of the gas distribution cavity is larger than the volume of the air outlet structure.

[0005] According to the driving component of the present disclosure, by providing a gas distribution cavity in the driving component, the discharging speed of the gas from the driving component can be reduced, the noise generated when the gas is discharged can be reduced, and the user experience can be improved.

[0006] In some embodiments, the driving component further includes a gas guiding structure, and the gas guiding structure is located in the gas distribution cavity. A first through hole is provided on the gas guiding structure, and the air cavity is communicated with the gas distribution cavity through the first through hole.

[0007] In some embodiments, the air outlet structure is formed on the wall of the cover and includes one or more second through holes.

[0008] In some embodiments, the number of the first through holes is five, and the distance between the first through hole located at the center and each of the remaining first through holes is the same. The number of the second through holes is five, and the distance between the second through hole located at the center and each of the remaining second through holes is the same.

[0009] In some embodiments, the axial direction of the first through hole is perpendicular to the axial direction of the second through hole.

[0010] In some embodiments, the five second through holes are formed on a first side wall of the cover, and the air inlet structure is formed on a second side wall of the cover. The gas guiding structure includes a vertical section and an extending section, and the five first through holes are located on the wall of the extending section away from the second through holes.

[0011] In some embodiments, the number of the first through holes is two, and the two first through holes are arranged in a single row along the first direction. The number of the second through holes is multiple, and the multiple second through holes are arranged in pairs on the side wall of the cover. Wherein, the straight line where the axis of the second through hole is located and the straight line where the first direction is located are skew lines. Or, the straight line where the axis of the second through hole is located intersects the straight line where the first direction is located.

[0012] In some embodiments, multiple second through holes are arranged in pairs on four side walls of the cover, an air inlet structure is formed on one of the side walls of the cover, the gas guiding structure includes a vertical section and an extending section, and the first through hole is located on the vertical section.

[0013] In some embodiments, the number of the first through holes is five, and the distance between the first through hole located at the center and each of the remaining first through holes is the same. The number of the second through holes is multiple, and the multiple second through holes are arranged in pairs on the side wall of the cover.

[0014] In some embodiments, the straight line where the axis of the second through hole is located and the straight line where the axis of the first through hole is located are skew lines.

[0015] In some embodiments, the number of the second through holes is four pairs, and they are formed on four side walls of the cover in one-to-one correspondence, and two pairs of the second through holes arranged oppositely are symmetrical.

[0016] In some embodiments, four pairs of second through holes are arranged in pairs on four side walls of the cover, an air inlet structure is formed on one of the side walls of the cover, the gas guiding structure includes a vertical section and an extending section, and the five first through holes are located on the extending section.

[0017] According to a second aspect of the present disclosure, there is provided a milk sucking device, including a milk sucking assembly and a controller. The milk sucking assembly is used to fit against the breast to suck milk. The controller includes the driving assembly in any of the above embodiments, and the air inlet structure of the driving assembly is connected to the milk sucking assembly to generate a negative pressure for sucking milk in the milk sucking assembly.

[0018] It should be understood that the content described in the utility model content part is not intended to limit the key or important features of the embodiments of the present disclosure, nor to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Combined with the drawings and referring to the following detailed description, the above and other features, advantages and aspects of the embodiments of the present disclosure will become more obvious. In the drawings, the same or similar reference numerals represent the same or similar elements, where:

[0020] Figure 1 is a schematic structural diagram of the first embodiment of the driving assembly of the present disclosure;

[0021] Figure 2 is a schematic cross-sectional structure diagram of a driving component according to an embodiment of the present disclosure;

[0022] Figure 3 is a schematic structure diagram of the first embodiment of the cover of the present disclosure;

[0023] Figure 4 is a schematic structure diagram of the second embodiment of the driving component of the present disclosure;

[0024] Figure 5 is a schematic structure diagram of the second embodiment of the cover of the present disclosure;

[0025] Figure 6 is a schematic structure diagram of the third embodiment of the driving component of the present disclosure;

[0026] Figure 7 is a schematic structure diagram of the third embodiment of the cover of the present disclosure;

[0027] Figure 8 is a schematic structure diagram of an embodiment of the milk sucking device of the present disclosure.

[0028] Explanation of reference numerals:

[0029] 100: Driving component;

[0030] 101: Pump component;

[0031] 1011: Air cavity;

[0032] 102: Cover;

[0033] 103: Gas distribution cavity;

[0034] 104: Intake structure;

[0035] 105: Exhaust structure;

[0036] 1051: Second through hole;

[0037] 106: Gas guiding structure;

[0038] 1061: First through hole;

[0039] 200: Milk sucking device;

[0040] 201: Milk sucking component;

[0041] 202: Controller. Detailed implementation manners

[0042] The following describes exemplary embodiments of the present disclosure with reference to the accompanying drawings. Various details of the embodiments of the present disclosure are included to facilitate understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, descriptions of well-known functions and structures are omitted below for clarity and conciseness.

[0043] As Figures 1 to 6 shown, an embodiment of the present disclosure provides a drive assembly 100, which includes a pump assembly 101 and a cover 102. An air chamber 1011 is formed inside the pump assembly 101. The cover 102 is connected to the pump assembly 101. The cover 102 includes an air inlet structure 104 and an air outlet structure 105. The pump assembly 101 and the cover 102 enclose a gas distribution chamber 103. The air inlet structure 104 is communicated with the air chamber 1011 to provide an air inlet flow path when the pump assembly 101 sucks air. The air outlet structure 105 is communicated with the gas distribution chamber 103. The gas distribution chamber 103 is communicated with the air chamber 1011 to provide a channel for the gas to be discharged from the pump assembly 101. The volume of the gas distribution chamber 103 is larger than the volume of the air outlet structure 105.

[0044] The drive assembly 100 can be understood as a component of the controller in the milk sucking device, which is used to provide the power for sucking milk. The pump assembly 101 is the mechanical part in the drive assembly 100 for sucking and discharging gas. An air chamber 1011 can be provided in the pump assembly 101. The pump assembly 101 changes the air pressure in the air chamber 1011 through mechanical movement. The change in the air pressure in the air chamber 1011 affects the air pressure of the milk sucking assembly attached to the breast, so as to form a milk sucking environment similar to that of an infant's oral cavity in the milk sucking assembly.

[0045] The cover 102 is used to be connected to the pump assembly 101. After the cover 102 is connected to the pump assembly 101, a gas distribution chamber 103 as Figure 2 shown is enclosed between them. Figure 2 A part of the gas distribution chamber 103 disclosed in

[0046] As Figures 1 to 6As shown, an intake structure 104 and an exhaust structure 105 are provided on the cover 102. One end of the intake structure 104 is used to connect to the milk suction assembly, and the other end is communicated with the air chamber 1011 of the pump assembly 101. When the pump assembly 101 sucks in gas, the gas in the milk suction assembly enters the air chamber 1011 through the intake structure 104. The exhaust structure 105 is communicated with the gas distribution chamber 103 and the external environment respectively. For example, the exhaust structure 105 can be formed on the wall of the cover 102 and includes one or more second through holes 1051 for communicating the gas distribution chamber 103 and the external environment. When the pump assembly 101 discharges gas, the gas in the air chamber 1011 passes through the gas distribution chamber 103 and is discharged to the external environment through the second through holes 1051.

[0047] As Figure 3 , Figure 5 , Figure 7 As shown, the air chamber 1011 and the gas distribution chamber 103 can be communicated through a gas guiding structure 106. For example, in some embodiments, the driving assembly 100 further includes a gas guiding structure 106, and the gas guiding structure 106 is located in the gas distribution chamber 103. A first through hole 1061 is provided on the gas guiding structure 106, and the air chamber 1011 and the gas distribution chamber 103 are communicated through the first through hole 1061. So that the gas can smoothly be discharged from the air chamber 1011 into the gas distribution chamber 103.

[0048] The volume of the gas distribution chamber 103 can be set to be relatively large. For example, the remaining part of the cover 102 except the intake structure 104 and the exhaust structure 105 is set as a part of the gas distribution chamber 103. Or the remaining part of the top of the pump assembly 101 except the air chamber 1011 is set as a part of the gas distribution chamber 103. In some embodiments, the volume of the gas distribution chamber 103 is larger than the volume of the exhaust structure 105. Or, the volume of the gas distribution chamber 103 is larger than the amount of gas discharged when the pump assembly 101 relieves pressure once. With such a setting, when the air chamber 1011 relieves pressure, the gas flows from the air chamber 1011 into the gas distribution chamber 103 with a relatively large volume, and then the gas flow rate will decrease. The noise generated when the gas with a reduced flow rate is discharged to the external environment through the exhaust structure 105 will decrease.

[0049] The interior of the gas guiding structure 106 may also have a channel for gas flow. The first through hole 1061 penetrates through this channel so that the channel communicates with the gas distribution cavity 103 through the first through hole 1061. The gas in the gas cavity 1011 is first discharged into this channel and then discharged into the gas distribution cavity 103 through the first through hole 1061. The channel for gas flow may have a relatively large volume. For example, the volume inside the channel may be larger than the amount of gas discharged during one pressure relief of the pump assembly 101. With such a setting, when the gas cavity 1011 is depressurized, the gas velocity will decrease after the gas is discharged from the gas cavity 1011 into the channel with a relatively large volume, and the noise generated when the gas with a reduced velocity is discharged into the gas distribution cavity 103 through the first through hole 1061 will be reduced.

[0050] According to an embodiment of the present disclosure, when the gas distribution cavity 103 is provided in the driving assembly 100, the gas in the gas cavity 1011 first enters the gas distribution cavity 103, so that the gas entering the gas distribution cavity 103 can be buffered. Subsequently, the gas in the gas distribution cavity 103 enters the external environment through the air outlet structure 105. In this way, the speed of the gas discharged from the driving assembly 100 can be reduced, the noise generated when the gas is discharged can be reduced, and the user experience can be improved. In addition, the volume of the gas distribution cavity 103 is larger than the volume of the air outlet structure 105, which can make the buffering effect of the gas entering the gas distribution cavity 103 better, and further reduce the noise generated when the gas is discharged.

[0051] Based on the above embodiments, the present disclosure also provides different embodiments of the driving assembly 100 and the cover 102.

[0052] The driving assembly 100 disclosed in an embodiment of the present disclosure, as Figure 1 and Figure 3 shown, Figure 3 discloses the cover 102 of the driving assembly 100. The number of the first through holes 1061 of the cover 102 may be five, and the distance between the first through hole 1061 located at the center and each of the remaining first through holes 1061 is the same. The number of the second through holes 1051 may be five, and the distance between the second through hole 1051 located at the center and each of the remaining second through holes 1051 is the same.

[0053] The arrangement of the five first through holes 1061 may be as Figure 3 shown, where four of the first through holes 1061 form a square, and the fifth first through hole 1061 is located at the center of the square. With such a setting, the mutual influence of the gas discharged between the first through holes 1061 can be reduced, and the noise of the gas discharge can be reduced. The arrangement of the five second through holes 1051 may refer to the arrangement of the five first through holes 1061 and will not be elaborated here.

[0054] The relative position between the first through-hole 1061 and the second through-hole 1051 can be adjusted to maximize the path for gas to flow from the first through-hole 1061 into the second through-hole 1051. The gas enters the gas distribution chamber 103 from the first through-hole 1061, and after reducing the flow rate through the gas distribution chamber 103, it is discharged through the second through-hole 1051. As Figure 3 shown, the relative position between the first through-hole 1061 and the second through-hole 1051 can have the following characteristics: the axial direction of the first through-hole 1061 is perpendicular to the axial direction of the second through-hole 1051. Of course, the relative positional relationship between the first through-hole 1061 and the second through-hole 1051 can also be other ways, which are not limited here.

[0055] In an implementable solution, the axial direction of the first through-hole 1061 being perpendicular to the axial direction of the second through-hole 1051 specifically means that the axis at the air outlet of the first through-hole 1061 is parallel to the height direction of the pump assembly 101, while the axis of the first through-hole 1061 is perpendicular to the height direction of the pump assembly 101.

[0056] In some embodiments, as Figure 3 shown, five second through-holes 1051 are formed on the first side wall of the cover 102, the air intake structure 104 is formed on the second side wall of the cover 102, the gas guiding structure 106 includes a vertical section and an extension section, and five first through-holes 1061 are located on the wall of the extension section away from the second through-hole 1051. After the gas enters the air chamber 1011 from the air intake structure 104 on the second side wall, it is discharged successively through the vertical section, the five first through-holes 1061 of the extension section, the gas distribution chamber 103, and the five second through-holes 1051 on the first side wall.

[0057] The air intake structure 104 and the second through-hole 1051 are respectively arranged on two different side walls of the cover 102, which can reduce the volume of the cover 102.

[0058] As Figure 3 shown, the structure arranged side by side with a part of the air intake structure 104 located in the gas distribution chamber 103 is the vertical section, and the structure where the first through-hole 1061 is arranged is the extension section. Arranging the first through-hole 1061 in the extension section can increase the path length of the gas flow channel in the gas guiding structure 106, increase the accommodation volume of the channel, and reduce the gas flow rate of the gas entering the channel from the air chamber 1011. The position of the first through-hole 1061 in the extension section can be adjusted. For example, the first through-hole 1061 is arranged on the wall of the extension section away from the second through-hole 1051 (such as the wall opposite to the air chamber 1011 in the figure), which can make the gas enter the gas distribution chamber 103 as much as possible after being discharged from the first through-hole 1061, and then be discharged through the second through-hole 1051 from the gas distribution chamber 103.

[0059] In some other embodiments, a part of the air intake structure 104 may protrude from the second side wall of the cover 102 to facilitate connection with the milk sucking assembly. Another part of the air intake structure 104 may be arranged side by side with the vertical section to facilitate communication with the air cavity 1011.

[0060] The drive assembly 100 disclosed in another embodiment of the present disclosure, as Figure 4 and Figure 5 shown, Figure 5 discloses the cover 102 of the drive assembly 100. The number of the first through holes 1061 of the cover 102 is two, and the two first through holes 1061 are arranged in a single row along the first direction. The number of the second through holes 1051 is multiple, and the multiple second through holes 1051 are arranged in pairs on the side wall of the cover 102. Among them, the straight line where the axis of the second through hole 1051 is located and the straight line where the first direction is located are skew lines, or the straight line where the axis of the second through hole 1051 is located intersects the straight line where the first direction is located.

[0061] The first direction can be understood as Figure 4 the height direction in Figure 4 , Figure 5 . The shape of the second through hole 1051 can be the notch shape shown in

[0062] , or can also be the shape of the through hole in the above embodiment. Through the second through holes 1051 arranged in pairs on the side wall of the cover 102, the air pressure in the gas distribution cavity 103 can be quickly reduced, and the speed of the gas discharged from the gas distribution cavity 103 can be reduced, so as to better reduce the noise generated when the gas is discharged. Figure 5 The number of the multiple second through holes 1051 and the positional relationship between them can be adjusted according to the number of the side walls of the cover 102. For example,

[0063] as shown in Figure 5 , the second through holes 1051 are four pairs and are formed on the four side walls of the cover 102 one by one. In one embodiment, the two pairs of second through holes 1051 arranged oppositely can be symmetrically arranged.

[0064] The relative position of the vertical section and the air intake structure 104 can be adjusted. For example, in some embodiments, a part of the air intake structure 104 protrudes from the second side wall of the cover 102 to facilitate connection with the milk suction assembly. Another part of the air intake structure 104 can be arranged side by side with the vertical section. With such an arrangement, on the one hand, it can facilitate the communication between the air cavity 1011 and the gas distribution cavity 103, and on the other hand, it can increase the volume of the gas distribution cavity 103 in the cover 102, further improving the noise reduction effect.

[0065] The drive assembly 100 disclosed in another embodiment of the present disclosure, as Figure 6 and Figure 7 shown, Figure 7 discloses the cover 102 of the drive assembly 100. The number of the first through holes 1061 in the cover 102 is five, and the distance between the central first through hole 1061 and each of the remaining first through holes 1061 is the same. The number of the second through holes 1051 is multiple, and the multiple second through holes 1051 are arranged in pairs on the side wall of the cover 102.

[0066] The arrangement of the five first through holes 1061 can be Figure 7 shown. Four first through holes 1061 form a square, and the fifth first through hole 1061 is located at the center of the square. With such an arrangement, the mutual influence of the discharged gas between adjacent first through holes 1061 can be reduced, and the noise of the gas discharge can be lowered. The shape of the second through hole 1051 can be Figure 6 、 Figure 7 the notch shape shown in. It can also be the shape of the through hole in the above embodiment. Through the second through holes 1051 arranged in pairs on the side wall of the cover 102, the air pressure in the gas distribution cavity 103 can be quickly reduced, and the flow rate of the gas discharged from the gas distribution cavity 103 can be lowered.

[0067] The relative position between the first through hole 1061 and the second through hole 1051 can be adjusted. For example Figure 7 shown, the straight line where the axis of the second through hole 1051 is located and the straight line where the axis of the first through hole 1061 is located are skew lines, or the straight line where the axis of the second through hole 1051 is located intersects with the straight line where the axis of the first through hole 1061 is located. With such an arrangement, it can be ensured that the gas discharged from the first through hole 1061 enters the gas distribution cavity 103 as much as possible, and is prevented from being directly discharged from the second through hole 1051.

[0068] The number and the positional relationship between the multiple second through holes 1051 can be adjusted according to the number of side walls of the. For example Figure 7 shown, the second through holes 1051 are four pairs, and are formed on the four side walls of the cover 102 in one-to-one correspondence, and two pairs of the second through holes 1051 arranged oppositely are symmetrically arranged.

[0069] In some embodiments, as Figure 7 shown, four pairs of second through-holes 1051 are arranged in pairs on four side walls of the cover 102, an air intake structure 104 is formed on one of the side walls of the cover 102, the gas guiding structure 106 includes a vertical section and an extension section, five first through-holes 1061 are located on the extension section, and gas enters the air cavity 1011 from the air intake structure 104 on one of the side walls of the cover 102, and is discharged in sequence through the vertical section, the five first through-holes 1061 of the extension section, the gas distribution cavity 103, and the second through-holes 1051 arranged in pairs on the four side walls of the cover 102.

[0070] As Figure 7 shown, a part of the air intake structure 104 may protrude from the second side wall of the cover 102 to facilitate connection with the milk suction assembly. The structure arranged side by side with another part of the air intake structure 104 is the vertical section. Such an arrangement can reduce the volume of the cover 102 and facilitate connection with the air cavity 1011. The structure where the first through-holes 1061 are provided is the extension section. Arranging the first through-holes 1061 on the extension section can increase the path length of the gas flow channel in the gas guiding structure 106, increase the accommodation volume of the channel, and reduce the gas flow rate of the gas entering the channel from the air cavity 1011. Figure 7 In [reference], the first through-holes 1061 are located on the bottom wall of the extension section (i.e., the side opposite to the pump assembly 101), so that the gas can enter the gas distribution cavity 103 after being discharged from the first through-holes 1061 as much as possible, and then be discharged from the gas distribution cavity 103 through the second through-holes 1051.

[0071] As Figure 8 shown, the present disclosure also provides a milk suction device 200, including a milk suction assembly 201 and a controller 202. The milk suction assembly 201 is used to fit against the breast to suck milk. The controller 202 includes the driving assembly 100 in any of the above embodiments, and the air intake structure 104 of the driving assembly 100 is connected to the milk suction assembly 201 to generate a negative pressure for sucking milk in the milk suction assembly 201.

[0072] The milk suction assembly 201 and the controller 202 may refer to the milk suction assembly and the controller in any of the above embodiments, and will not be elaborated here. The driving assembly 100 and the cover 102 configured therewith may refer to the embodiments of the driving assembly 100 and the cover 102 of the above three different specifications, or other driving assemblies 100 or covers 102 configured with a gas distribution cavity 103 and capable of implementing the corresponding known functions and their optional solutions.

[0073] In the description of this specification, it should be understood that, unless otherwise clearly specified and defined, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present disclosure.

[0074] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present disclosure, "a plurality of" means two or more unless otherwise clearly and specifically defined.

[0075] In the present disclosure, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0076] In the present disclosure, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0077] The foregoing disclosure provides many different embodiments or examples for implementing different structures of the present disclosure. To simplify the disclosure of the present disclosure, the components and settings of specific examples are described above. Of course, they are merely examples and are not intended to limit the present disclosure. In addition, the present disclosure may repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0078] The above specific embodiments do not constitute a limitation on the protection scope of the present disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present disclosure shall be included within the protection scope of the present disclosure.

Claims

1. A drive assembly, characterized in that: include: A pump assembly, wherein an air cavity is formed inside; A cover connected to the pump assembly, the cover comprising an air inlet structure and an air outlet structure; Wherein, the pump assembly and the cover enclose a gas distribution chamber; The air intake structure is in communication with the air cavity to provide an air intake path for the pump assembly when the pump assembly inhales air; and The gas outlet structure is in communication with the gas distribution cavity, and the gas distribution cavity is in communication with the gas cavity to provide a channel for gas to be discharged from the pump assembly; wherein the volume of the gas distribution cavity is greater than the volume of the gas outlet structure.

2. The drive assembly according to claim 1, characterized in that: Also included is a gas guiding structure, the gas guiding structure being located within the gas distribution cavity; The gas guiding structure is provided with a first through hole, and the gas cavity is communicated with the gas distribution cavity through the first through hole.

3. The drive assembly according to claim 2, characterized in that: The air outlet structure is formed on the wall of the cover and includes one or more second through holes.

4. The drive assembly according to claim 3, characterized in that: The number of the first through holes is five, wherein the first through hole located in the center has the same spacing as that of the other first through holes; The number of the second through holes is five, wherein the second through hole located in the center has the same spacing as that of the other second through holes.

5. The drive assembly according to claim 4, characterized in that: The axial direction of the first through hole is perpendicular to the axial direction of the second through hole.

6. The drive assembly according to claim 5, characterized in that: Five of the second through holes are formed on the first side wall of the cover, and the air intake structure is formed on the second side wall of the cover; The gas guiding structure includes a vertical section and an extension section, and the five first through holes are located on a wall of the extension section away from the second through holes.

7. The drive assembly according to claim 3, characterized in that: The number of the first through holes is two, and the two first through holes are arranged in a single row along the first direction; There are a plurality of the second through holes, and the plurality of the second through holes are arranged in pairs on the side wall of the cover; Wherein, the straight line where the axis of the second through hole lies and the straight line where the first direction lies are skew lines; or, The straight line where the axis of the second through hole lies intersects with the straight line where the first direction lies.

8. The drive assembly according to claim 7, characterized in that: A plurality of the second through holes are arranged in pairs on four side walls of the cover, the air intake structure is formed on one of the side walls of the cover, the gas guiding structure comprises a vertical section, and the first through holes are located on the vertical section.

9. The drive assembly according to claim 3, characterized in that: The number of the first through holes is five, wherein the first through hole located in the center has the same spacing as that of the other first through holes; There are a plurality of the second through holes, and the plurality of the second through holes are arranged in pairs on the side wall of the cover.

10. The drive assembly according to claim 9, characterized in that The straight line where the axis of the second through hole is located and the straight line where the axis of the first through hole is located are skew lines.

11. The drive assembly according to claim 9, characterized in that: There are four pairs of second through holes, which are formed on the four side walls of the cover in a one-to-one correspondence, wherein two pairs of second through holes that are arranged opposite to each other are symmetrical.

12. The drive assembly according to claim 11, characterized in that Four pairs of the second through holes are arranged in pairs on four side walls of the cover, the air intake structure is formed on one of the side walls of the cover, the gas guiding structure includes a vertical section and an extension section, and five of the first through holes are located on the extension section.

13. A breast pumping device, characterized in that: include: A pump assembly that fits over the breast to extract milk; and A controller comprising a drive assembly according to any one of claims 1 to 12, wherein an air intake structure of the drive assembly is connected to the milk suction assembly to generate negative pressure in the milk suction assembly for sucking milk.

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