Air path assembly and breast pump

Abstract

The utility model relates to the technical field of breast pumps, in particular to an air path assembly and a breast pump. The air path assembly comprises a cover body, the outer side of the cover body is connected with a shell, the cover body is provided with an inner cavity and a first opening, the first opening is communicated with the inner cavity and allows breasts to stretch into, a first negative pressure cavity and a second negative pressure cavity which are communicated are formed between the shell and the cover body, the first negative pressure cavity is located on the side close to the first opening, and the second negative pressure cavity is located on the other side of a connecting channel. The cover body has elasticity, and the first negative pressure cavity and the second negative pressure cavity which are communicated with the pressure assembly can drive the cover body to deform through pressure changes. The first negative pressure cavity and the second negative pressure cavity which are communicated are arranged, the cover body is driven to deform from different positions, discomfort caused by long-time deformation stimulation of the cover body in one independent direction or position is reduced, the first negative pressure cavity is close to the position of the first opening, and the cover body deforms to extrude and stimulate the breast stretching into the inner cavity, so that the breast is more comfortable. Infant sucking is simulated, and the effect of improving lactation is achieved by stimulating a milk matrix.

Description

Technical Field

[0001] This utility model relates to the field of breast pump technology, specifically an air circuit component and a breast pump. Background Technology

[0002] A breast pump is a tool that helps mothers collect breast milk, especially suitable for mothers who cannot breastfeed directly or need to store breast milk for later use. The design of a breast pump mimics a baby's sucking motion, effectively stimulating the breasts to produce milk and extracting it.

[0003] For example, the electric breast pump disclosed in Chinese patent document CN215840771U has a sealing structure between the suction bowl and the bowl groove and the negative pressure chamber to ensure airtightness. However, the suction bowl is connected to the end of the extended part. After the suction bowl is deformed, a negative pressure is formed between it and the bowl groove, which drives the breast to be squeezed and stimulated. This suction method cannot completely simulate the sucking action of an infant, resulting in the user not being able to effectively express milk.

[0004] Therefore, the air path structure of the breast pump needs to be improved to increase the efficiency of milk extraction and better enhance the user experience. Utility Model Content

[0005] To address the technical problem mentioned above that the suction method cannot fully simulate the sucking action of an infant, resulting in the user's inability to effectively secrete milk through the breast pump, the technical solution adopted by this utility model is as follows:

[0006] An airway assembly includes a cover, with a housing connected to the outside of the cover. The cover has an inner cavity and a first opening communicating with the inner cavity for the breast to extend into. A first negative pressure chamber and a second negative pressure chamber are connected between the housing and the cover. The first negative pressure chamber is located on the side closer to the first opening, and the second negative pressure chamber is located on the other side of the connecting channel. The cover is elastic, and the first negative pressure chamber and the second negative pressure chamber, which are connected to a pressure assembly, can cause the cover to deform through pressure changes.

[0007] Furthermore, in some embodiments of this utility model, the cover body has an outer contour portion on the side near the first opening, the outer diameter of the outer contour portion is larger than the outer diameter of the inner cavity, the cover body is flared, the connecting channel is located between the inner wall of the shell and the outer wall of the inner cavity, the first negative pressure cavity is arranged along the outer periphery of the cover body, the outer contour portion and / or the inner cavity are provided with protrusions, and there are multiple protrusions arranged at intervals.

[0008] Furthermore, in some embodiments of this utility model, a support member is connected between the cover and the housing, the first negative pressure chamber is located between the support member and the cover, the outer side of the support member abuts against the inner wall of the housing, and the hardness of the support member is greater than the hardness of the cover near the first opening.

[0009] Furthermore, in some embodiments of this utility model, the outer side of the cover is provided with a support rib that abuts against the support member. The support rib is provided with a first abutting end, a second abutting end that abuts against the support member, and a clearance opening located between the first abutting end and the second abutting end. Multiple support ribs are provided and spaced apart. Multiple support ribs and the support member surround to form a first negative pressure cavity.

[0010] Furthermore, in some embodiments of this utility model, a connecting channel is provided on the outer side of the inner cavity, located on the shell and / or the cover, the connecting channel connecting the first negative pressure cavity and the second negative pressure cavity, and the connecting channel being located between the inner wall of the shell and the outer wall of the inner cavity.

[0011] Furthermore, in some embodiments of this utility model, the connecting channel is located in the first negative pressure cavity or the second negative pressure cavity, the cover body is provided with an extension portion extending from the outer side of the inner cavity away from the first opening, the extension portion is provided with a first opening of the extension portion communicating with the first negative pressure cavity and a second opening of the extension portion communicating with the second negative pressure cavity, the connecting channel connects the first opening of the extension portion and the second opening of the extension portion, and the connecting channel is located between the outer wall of the inner cavity and the outer periphery of the extension portion.

[0012] Furthermore, in some embodiments of this utility model, the end of the extension is provided with a sealing end that abuts against the inner side of the housing. The sealing end is arranged along the outer periphery of the extension. The second negative pressure chamber is located in the space enclosed by the sealing end, the extension, and the inner side of the housing. A deformation gap is provided between the sealing end and the end of the extension.

[0013] Furthermore, in some embodiments of this utility model, the second negative pressure chamber is located on the side away from the first opening, the housing is provided with a guide flange protruding towards the extension and a negative pressure channel communicating with the second negative pressure chamber, the second negative pressure chamber is provided with a guide cavity located between the inner side of the housing and the guide flange, the guide cavity is communicating with the negative pressure channel, the guide cavity is arranged in a ring and is provided with a guide port facing the second opening of the extension.

[0014] Furthermore, in some embodiments of this utility model, the connecting channel is arranged in a straight line, and the outer side of the cover is provided with a flow guide near the first opening of the extension and for guiding the flow, and the flow guide is provided with a flow guide surface on the side of the flow guide facing the first opening of the extension.

[0015] Furthermore, in some embodiments of this utility model, the breast pump includes the aforementioned air passage assembly and a pressure assembly connected to the air passage assembly.

[0016] The beneficial effects of this utility model are as follows:

[0017] This invention, by setting up a first negative pressure chamber and a second negative pressure chamber that are connected, can drive the cover to deform from different positions, reducing the discomfort caused by prolonged deformation stimulation of the cover in a single direction or position. Since the first negative pressure chamber is close to the first opening, the deformation of the cover squeezes and stimulates the breast that extends into the inner cavity, mimicking a baby sucking, and thereby stimulating milk let-down to improve lactation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the present invention.

[0019] Figure 2 for Figure 1 AA sectional view.

[0020] Figure 3 for Figure 2 Enlarged view of part C.

[0021] Figure 4 for Figure 1 Another sectional view of AA.

[0022] Figure 5 for Figure 1 BB cross-sectional view.

[0023] Figure 6 This is an exploded view and a partial enlarged view of the breast pump of this utility model.

[0024] Figure 7 This is an exploded view and a partial enlarged view of the breast pump of this utility model from another perspective. Detailed Implementation

[0025] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0028] Example 1

[0029] like Figures 1 to 7 The illustrated airway assembly includes a cover 2, with a housing 1 connected to the outside of the cover 2. The cover 2 has an inner cavity 21 and a first opening 2 communicating with the inner cavity 21 and allowing the breast to extend into it. A first negative pressure chamber 4 and a second negative pressure chamber 5 are provided between the housing 1 and the cover 2. The first negative pressure chamber 4 is located on the side close to the first opening 22. The cover 2 is elastic, and the first negative pressure chamber 4 and the second negative pressure chamber 5 communicating with the pressure assembly can cause the cover 2 to deform through pressure changes.

[0030] This invention, by setting up a first negative pressure chamber and a second negative pressure chamber that are connected, can drive the cover to deform from different positions, reducing the discomfort caused by prolonged deformation stimulation of the cover in a single direction or position. Since the first negative pressure chamber is close to the first opening, the deformation of the cover squeezes and stimulates the breast that extends into the inner cavity, mimicking a baby sucking, and thereby stimulating milk let-down to improve lactation.

[0031] Alternatively, in some embodiments, the deformation area is made of silicone or rubber.

[0032] Furthermore, as a preferred embodiment of this utility model and not a limitation, the shell is connected to the outside of the cover, providing a certain degree of protection and support for the cover. A first negative pressure chamber and a second negative pressure chamber are formed between the shell and the cover. A connecting channel allows the two negative pressure chambers to simultaneously experience pressure changes, enabling the cover to deform near either the first or second negative pressure chamber. The cover has an inner cavity that can accommodate or contact the breast and matches its size and shape. Its first opening communicates with the inner cavity and allows the breast to extend into it. The elastic cover can deform under external force to stimulate and compress the breast.

[0033] Optionally, in some embodiments, in the application scenario of a breast pump, the deformation of the cover caused by the pressure change of the first negative pressure chamber or the second negative pressure chamber of the above structure is used to simulate the sucking action of an infant, thereby stimulating the breast that extends into the first opening of the cover to achieve functions such as assisting in milk discharge.

[0034] Optionally, in some embodiments, in order to enable the first negative pressure chamber to quickly deform the cover through air pressure changes, the pressure component can be directly connected to the first negative pressure chamber. When gas enters, some gas enters the second negative pressure chamber from the first negative pressure chamber. When gas is discharged, the gas enters the first negative pressure chamber from the second negative pressure chamber and then enters the pressure component.

[0035] Optionally, in some embodiments, in order to make the airflow movement more stable and the stimulation of the breast near the first opening more gentle, the pressure component can be directly connected to the second negative pressure chamber. When the gas enters, some of the gas enters the first negative pressure chamber from the second negative pressure chamber. When the gas is discharged, the gas enters the second negative pressure chamber from the first negative pressure chamber and then enters the pressure component.

[0036] Optionally, in some embodiments, the first negative pressure chamber and the second negative pressure chamber are respectively connected to pressure components. When gas enters, one of the pressure components can drive the gas to first pass through the connecting channel from the second negative pressure chamber into the first negative pressure chamber. When gas is discharged, the gas directly enters the other pressure component from the first negative pressure chamber.

[0037] Alternatively, in some embodiments, the pressure assembly is not limited to components such as a motor, pump body, solenoid valve, and control unit.

[0038] Optionally, in some embodiments, a pressure component is connected to the negative pressure channel to cause a change in the pressure of the first negative pressure chamber and the second negative pressure chamber.

[0039] Of course, the pressure component can be an electric vacuum pump, a microprocessor-controlled air pump, an electromagnetic pump, or other devices that can automatically adjust the pressure, or it can be a manually operated manual airbag, a manual piston, or other devices.

[0040] like Figures 1 to 7 The air passage assembly shown has an outer contour 24 on the side of the cover 2 near the first opening 22. The outer diameter of the outer contour 24 is larger than the outer diameter of the inner cavity 21. The cover 2 is flared. The connecting channel 23 is located between the inner wall of the housing 1 and the outer wall of the inner cavity 21.

[0041] Optionally, in some embodiments, a reduction in the outer diameter from the outer contour to the other end of the cover helps to create a better seal when the cover comes into contact with the breast. When the pressure within the negative pressure chamber changes, the cover deforms accordingly, thereby fitting more closely to the breast surface and reducing the possibility of gas leakage.

[0042] Optionally, in some embodiments, when used as a breast pump component, the cover is flared to facilitate the insertion of the breast, and the outer contour can better fit around the breast, providing better sealing and preventing gas leakage. This ensures the stability of the internal negative pressure environment when the air circuit component is working, and during the generation of negative pressure, it can apply the corresponding force to the breast more evenly, simulating a more natural and comfortable sucking or squeezing effect.

[0043] like Figures 1 to 4 The air passage assembly shown has a first negative pressure chamber 4 disposed along the outer periphery of the cover 2, and the outer contour 24 and / or inner cavity 21 are provided with protrusions 26, and the protrusions 26 are provided in multiple and spaced apart.

[0044] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the first negative pressure chamber is arranged along the outer periphery of the cover. This arrangement helps to ensure that the negative pressure is distributed more evenly on the cover, avoids excessive deformation or damage to the cover in local areas due to excessive negative pressure, and also improves the adaptability of the cover to breasts of different shapes and sizes.

[0045] Specifically, the protrusions can deform more flexibly under negative pressure, providing a gentle massage and squeezing effect on the breasts. During breastfeeding, this helps promote milk flow, prevents milk stasis, and further improves milk extraction efficiency, while also alleviating discomfort such as breast engorgement to some extent. Multiple spaced protrusions on the outer contour and / or inner cavity provide additional deformation space for the breast cover at the connection points. Specifically, the connection points between the protrusions are grooves 28. These protrusions can deform in a predetermined manner under negative pressure, and the grooves 28 help the protrusions return to their original shape more quickly after the pressure is released, thereby improving the elasticity and durability of the breast cover.

[0046] Optionally, in some embodiments, the outer contour is provided with protrusions that can compress and stimulate the area of ​​the breast close to the outer contour.

[0047] Optionally, in some embodiments, the inner cavity is provided with protrusions that can compress and stimulate the breast near the inner cavity.

[0048] Optionally, in some embodiments, both the outer contour and the inner cavity are provided with protrusions, which can simultaneously compress and stimulate the breast at the position close to the outer contour and the inner cavity.

[0049] like Figures 2 to 4 The air passage assembly shown has a support member 3 connected between the cover 2 and the housing 1. The first negative pressure chamber 4 is located between the support member 3 and the cover 2. The outer side of the support member 3 abuts against the inner wall of the housing 1. The hardness of the support member 3 is greater than the hardness of the side of the cover 2 near the first opening 22.

[0050] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the support member provides additional support between the cover and the housing, enhancing the structural stability of the entire air circuit assembly. This helps prevent excessive deformation or damage to the cover under negative pressure, ensuring the long-term stable operation of the air circuit assembly. The outer side of the support member abuts against the inner wall of the housing, helping to reduce the gap between the cover and the inner wall of the housing, more effectively preventing air leakage and ensuring the effective transmission of negative pressure.

[0051] Specifically, the support component has a higher hardness than the side of the cover closest to the first opening. On the one hand, this can protect the cover from damage caused by external impacts or wear to a certain extent, extending the service life of the cover and reducing maintenance costs. On the other hand, it can more precisely control the degree of deformation of the cover to meet different application requirements.

[0052] Alternatively, in some embodiments, the support may be made of rigid plastic.

[0053] Optionally, in some embodiments, the support may be made of materials such as polypropylene, polyamide, thermoplastic polyurethane elastomer rubber, ethylene-vinyl acetate copolymer, ABS plastic, and polycarbonate.

[0054] like Figures 2 to 7 The air passage assembly shown has a support rib 27 on the outer side of the cover 2 that abuts against the support member 3. The support rib 27 has a first abutting end 271, a second abutting end 272 that abut against the support member 3 respectively, and a clearance opening 273 located between the first abutting end 271 and the second abutting end 272. There are multiple support ribs 27 that are spaced apart. The multiple support ribs 27 and the support member 3 enclose a first negative pressure chamber 4.

[0055] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the tight contact between the first abutting end and the second abutting end and the support member reduces the gap between the cover and the support member, which helps to prevent air leakage and improve sealing performance. The setting of the support rib enhances the support of the outer side of the cover and together with the support member forms the first negative pressure cavity, which improves the structural stability of the entire air circuit assembly, helps to prevent the cover from undergoing excessive deformation under negative pressure, and ensures that the air circuit assembly can work stably for a long time.

[0056] Specifically, the spacing of the support ribs can disperse stress under negative pressure, reducing damage to the enclosure caused by stress concentration. This helps extend the service life of the enclosure and improve its durability. The support ribs divide the first negative pressure chamber into multiple areas, and the avoidance openings allow these areas to connect with each other. This can affect the distribution and deformation pattern of the negative pressure on the enclosure. The negative pressure can drive the protrusions to deform in each area, thereby more precisely controlling the deformation of the entire enclosure.

[0057] Specifically, in some embodiments, the breast pump is connected to a one-way valve and a milk storage container. During use, the outer contour 24 is placed against the breast; the nipple is inserted into the inner cavity 21, and the protruding part corresponding to the outer contour 24 is wrapped around the areola, while a certain pre-pressure is applied to the areola; after the breast pump is turned on, when the air pump and solenoid valve on the pressure assembly draw air from the first negative pressure chamber 4, a vacuum is formed in the first negative pressure chamber 4. The protruding part corresponding to the protrusion 26 begins to shrink and deform under pressure, the space of the first negative pressure chamber becomes smaller, the silicone covering the areola moves away from the areola, and the milk is sucked out and flows into the milk storage container through the one-way valve.

[0058] When the solenoid valve blocks the air pump from drawing air, the first negative pressure chamber 4 is refilled with air, the internal and external pressures are consistent, and the protruding position corresponding to the first negative pressure chamber 4 returns to its original state and presses against the areola, thus ending the milk extraction; this cycle continues until one milk extraction cycle is completed.

[0059] Example 2

[0060] Example 2, based on Example 1, also has the following implementation method:

[0061] like Figures 2 to 4 The air passage assembly shown has a connecting channel 23 located on the outer side of the inner cavity 21, which is located on the housing 1 and / or the cover 2. The connecting channel 23 connects the first negative pressure chamber 4 and the second negative pressure chamber 5. The connecting channel 23 is located between the inner wall of the housing 1 and the outer wall of the inner cavity 21.

[0062] Optionally, in some embodiments, the connecting channel may be located on the housing to connect the first negative pressure chamber and the second negative pressure chamber. When the pressure assembly draws in air, gas can enter the second negative pressure chamber from the first negative pressure chamber through the connecting channel on the housing, or vice versa. Specifically, in some embodiments, a portion of the housing protruding towards the cover separates the first and second negative pressure chambers between the housing and the cover, and the connecting channel is located on this protruding portion.

[0063] Optionally, in some embodiments, the connecting channel may be located on the cover to connect the first negative pressure chamber and the second negative pressure chamber. When the pressure assembly draws in air, gas can enter the second negative pressure chamber from the first negative pressure chamber through the connecting channel on the cover, or vice versa. Specifically, in some embodiments, a portion of the cover protruding towards the housing separates the first and second negative pressure chambers between the housing and the cover, and the connecting channel is located on this protruding portion.

[0064] Of course, in other embodiments, the connection channel may be located partly on the housing and partly on the cover, and when the housing and the cover are connected, they can enclose and form the connection channel.

[0065] Specifically, the connection channel is located between the inner wall of the housing and the outer wall of the inner cavity, ensuring that negative pressure can be smoothly transmitted from the pressure component to the inside of the enclosure, reducing pressure loss caused by complex structure or tortuous path, and improving the efficiency of negative pressure transmission.

[0066] Specifically, in some embodiments, the inner wall of the housing has a portion that protrudes towards the cover to separate the first negative pressure chamber and the second negative pressure chamber between the housing and the cover, and the connecting channel is located on the protruding portion of the inner wall of the housing.

[0067] Specifically, in some embodiments, the portion of the outer wall of the cover that protrudes towards the shell separates the first negative pressure chamber and the second negative pressure chamber between the shell and the cover, and the connecting channel is located on the protruding portion of the outer wall of the cover.

[0068] Of course, in other embodiments, the connection channel may be located partly on the protruding portion of the inner wall of the housing and partly on the protruding portion of the outer wall of the cover, so that when the housing and the cover are connected, they can be enclosed to form the connection channel.

[0069] Example 3

[0070] Based on Example 1, Example 3 also has the following implementation method:

[0071] like Figures 2 to 4The illustrated air passage assembly has a connecting channel 23 located in either the first negative pressure chamber 4 or the second negative pressure chamber 5. The cover 2 has an extension 25 extending from the outside of the inner cavity 21 away from the first opening 22. The extension 25 has a first opening 251 communicating with the first negative pressure chamber 4 and a second opening 252 communicating with the second negative pressure chamber 5. The connecting channel 23 connects the first opening 251 and the second opening 252. The connecting channel 23 is located between the outer wall of the inner cavity 21 and the outer periphery of the extension 25.

[0072] Specifically, the connecting channel 23 is located on the cover 2, so that the first negative pressure chamber 4 and the second negative pressure chamber 5 are connected. When the pressure assembly draws in air, the gas can enter the second negative pressure chamber 5 from the first negative pressure chamber 4 through the connecting channel 23 on the cover 2, or enter the first negative pressure chamber 4 from the second negative pressure chamber 5 through the connecting channel 23 on the cover 2. The pressure assembly is directly connected to the second negative pressure chamber 5. When gas enters, some gas passes through the connecting channel 23 from the second negative pressure chamber 5 into the first negative pressure chamber 4. When gas is discharged, the gas passes through the connecting channel 23 from the first negative pressure chamber 4 into the second negative pressure chamber 5, and then into the pressure assembly.

[0073] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the extension portion enables the connecting channel to connect the first negative pressure chamber and the second negative pressure chamber more directly, reducing the path length of pressure transmission and possible leakage points, which helps to improve the accuracy and efficiency of negative pressure transmission and ensures that the cover can deform under the drive of the negative pressure change in the first or second negative pressure chamber.

[0074] Optionally, in some embodiments, the extension direction is perpendicular to the length extension direction of the cover.

[0075] Optionally, in some embodiments, the outer diameter of the extension is larger than the inner diameter of the cavity.

[0076] Specifically, by providing a first opening on the extension that communicates with the first negative pressure chamber and a second opening on the extension that communicates with the second negative pressure chamber, the distribution of negative pressure on the cover can be controlled more flexibly, avoiding excessive local pressure or uneven deformation of the cover, thereby improving the adaptability and service life of the cover. Furthermore, the extension structure is relatively stable and can withstand greater pressure changes, protecting the connection channels and contributing to enhanced structural stability, durability, and reliability of the entire air circuit assembly.

[0077] like Figure 2 and Figure 3The gas path assembly shown has an extension 25 with a sealing end 254 that abuts against the inner side of the housing 1. The sealing end 254 is arranged along the outer periphery of the extension. The second negative pressure chamber 5 is located in the space formed by the sealing end 254, the extension 25, and the inner side of the housing 1. A deformation gap 2541 is provided between the sealing end 254 and the end of the extension 25.

[0078] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the deformation gap between the sealing end and the extension allows for more precise assembly of the gas path assembly. When the sealing end is positioned along the outer periphery of the extension and tightly abuts against the inner side of the housing, air leakage can be effectively prevented, improving the sealing performance of the gas path assembly. The sealing end, the extension, and the inner side of the housing together enclose and form a second negative pressure chamber, which helps ensure a more uniform distribution of negative pressure within the second negative pressure chamber.

[0079] like Figures 2 to 6 The illustrated gas path assembly has a second negative pressure chamber 5 located on the side away from the first opening 22. The housing 1 has a guide flange 12 protruding toward the extension 25 and a negative pressure channel 6 communicating with the second negative pressure chamber 5. The second negative pressure chamber 5 has a guide cavity 51 located between the inner side of the housing 1 and the guide flange 12. The guide cavity 51 communicates with the negative pressure channel 6. The guide cavity 51 is annularly arranged and has a guide port 511 facing the second opening 252 of the extension.

[0080] Furthermore, as a preferred embodiment of this utility model and not a limitation, the protruding design of the guide flange not only increases the structural strength of the shell but also serves to guide airflow by forming a guide cavity with the inner wall of the shell. This allows the airflow to enter the guide cavity more smoothly and then through the guide port into the second negative pressure chamber, thereby enhancing the negative pressure suction effect. The connection between the guide cavity and the negative pressure channel provides a smoother and more efficient path for the airflow within the second negative pressure chamber, helping to ensure a more uniform distribution of negative pressure within both the guide cavity and the second negative pressure chamber, thus improving the efficiency of negative pressure suction.

[0081] Specifically, when the distance between the guide flange and the end of the cover is large, the space of the second negative pressure chamber is larger. When the breast is inserted into the inner cavity, the end of the cover can deform to a certain extent, thereby creating negative pressure in the inner cavity. When the distance between the guide flange and the end of the cover is small, the space of the second negative pressure chamber is smaller. When the breast is inserted into the inner cavity, the airflow quickly enters the second opening of the extension through the guide cavity, and enters the first negative pressure chamber through the connecting channel, thereby squeezing and stimulating the breast near the first opening.

[0082] like Figures 2 to 7The air passage assembly shown has a connecting channel 23 arranged in a straight line. The outer side of the cover 2 is provided with a guide section 253 near the first opening 251 of the extension and for guiding the flow. The guide section 253 is provided with a guide surface 2531 on the side facing the first opening 251 of the extension.

[0083] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, optimizing the airflow path and reducing airflow obstruction within the connecting channel helps to reduce noise and vibration generated during negative pressure suction. Specifically, the connecting channel is arranged in a straight line, reducing bends and obstructions in the airflow within the connecting channel, allowing the airflow to flow more smoothly and helping to ensure the stability and efficiency of the airflow during negative pressure suction. The arrangement of the guide portion and its guide surface facing the first opening of the extension portion guide the airflow. It allows the airflow to enter the first negative pressure chamber more directly from the connecting channel, or from the first negative pressure chamber into the first opening of the extension portion, thereby enhancing the effect of negative pressure suction.

[0084] Example 4

[0085] Based on Example 1, Implementation 4 also has the following implementation methods:

[0086] like Figures 1 to 7 The breast pump shown includes the air passage assembly and a pressure assembly connected to the air passage assembly.

[0087] This invention, by setting up a first negative pressure chamber and a second negative pressure chamber that are connected, can drive the cover to deform from different positions, reducing the discomfort caused by prolonged deformation stimulation of the cover in a single direction or position. Since the first negative pressure chamber is close to the first opening, the deformation of the cover squeezes and stimulates the breast that extends into the inner cavity, mimicking a baby sucking, and thereby stimulating milk let-down to improve lactation.

[0088] In addition, this invention can reduce discomfort during the breast compression and stimulation process, and better improve the user experience. Specifically, this invention can also avoid the problem of local swelling and pain caused by negative pressure pulling the breast during the suction process when the suction bowl is deformed and forms a negative pressure between it and the bowl groove. This invention can reduce nipple pain and discomfort during the breast compression and stimulation process by squeezing the breast and even the areola.

[0089] This invention, through the coordinated operation of the airflow assembly and pressure assembly, can precisely control the negative pressure level inside the breast pump, helping to simulate the natural sucking rhythm of an infant, making the pumping process more comfortable and efficient, reducing nipple pain and discomfort for mothers, and improving pumping efficiency. The airflow assembly ensures that the breast pump forms an effective negative pressure zone when it fits closely to the breast, helping to ensure consistent pumping results.

[0090] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A pneumatic assembly, comprising a cover (2), characterized in that: The outer side of the cover (2) is connected to the shell (1). The cover (2) has an inner cavity (21) and a first opening (22) that communicates with the inner cavity (21) and allows the breast to extend into it. A first negative pressure chamber (4) and a second negative pressure chamber (5) are connected between the shell (1) and the cover (2). The first negative pressure chamber (4) is located on the side close to the first opening (22). The cover (2) is elastic. The first negative pressure chamber (4) and the second negative pressure chamber (5) that communicate with the pressure assembly can drive the cover (2) to deform through pressure changes.

2. The gas path assembly according to claim 1, characterized in that: The cover (2) has an outer contour (24) on the side near the first opening (22). The outer diameter of the outer contour (24) is larger than the outer diameter of the inner cavity (21). The cover (2) is flared. The first negative pressure cavity (4) is arranged along the outer periphery of the cover (2). The outer contour (24) and / or the inner cavity (21) are provided with protrusions (26). There are multiple protrusions (26) and they are spaced apart.

3. The pneumatic circuit assembly according to claim 1, characterized in that: A support member (3) is connected between the cover (2) and the shell (1). The first negative pressure chamber (4) is located between the support member (3) and the cover (2). The outer side of the support member (3) abuts against the inner wall of the shell (1). The hardness of the support member (3) is greater than the hardness of the cover (2) near the first opening (22).

4. The pneumatic circuit assembly according to claim 3, characterized in that: The outer side of the cover (2) is provided with a support rib (27) that abuts against the support member (3). The support rib (27) is provided with a first abutting end (271), a second abutting end (272) that abuts against the support member (3) respectively, and a clearance opening (273) located between the first abutting end (271) and the second abutting end (272). There are multiple support ribs (27) that are spaced apart. The multiple support ribs (27) and the support member (3) enclose to form a first negative pressure cavity (4).

5. A pneumatic circuit assembly according to claim 1, characterized in that: The inner cavity (21) is provided with a connecting channel (23) on the outer side of the housing (1) and / or the cover (2), the connecting channel (23) connects the first negative pressure cavity (4) and the second negative pressure cavity (5), and the connecting channel (23) is located between the inner wall of the housing (1) and the outer wall of the inner cavity (21).

6. A pneumatic circuit assembly according to claim 5, characterized in that: The connecting channel (23) is located in the first negative pressure chamber (4) or the second negative pressure chamber (5). The cover (2) is provided with an extension (25) extending from the outside of the inner cavity (21) away from the first opening (22). The extension (25) is provided with a first opening (251) communicating with the first negative pressure chamber (4) and a second opening (252) communicating with the second negative pressure chamber (5). The connecting channel (23) connects the first opening (251) and the second opening (252) of the extension. The connecting channel (23) is located between the outer wall of the inner cavity (21) and the outer periphery of the extension (25).

7. A pneumatic circuit assembly according to claim 6, characterized in that: The end of the extension (25) is provided with a sealing end (254) that abuts against the inner side of the housing (1). The sealing end (254) is arranged along the outer periphery of the extension. The second negative pressure chamber (5) is located in the space formed by the sealing end (254), the extension (25), and the inner side of the housing (1). A deformation gap (2541) is provided between the sealing end (254) and the end of the extension (25).

8. A pneumatic circuit assembly according to claim 6, characterized in that: The second negative pressure chamber (5) is located on the side away from the first opening (22). The housing (1) is provided with a guide flange (12) protruding toward the extension (25) and a negative pressure channel (6) communicating with the second negative pressure chamber (5). The second negative pressure chamber (5) is provided with a guide cavity (51) located between the inner side of the housing (1) and the guide flange (12). The guide cavity (51) is communicating with the negative pressure channel (6). The guide cavity (51) is arranged in an annular shape and is provided with a guide port (511) facing the second opening (252) of the extension.

9. A pneumatic circuit assembly according to claim 6, characterized in that: The connecting channel (23) is arranged in a straight line. The outer side of the cover (2) is provided with a flow guide (253) near the first opening (251) of the extension and used for flow guidance. The flow guide (253) is provided with a flow guide surface (2531) on the side facing the first opening (251) of the extension.

10. A breast pump, characterized in that: It includes the pneumatic assembly as described in any one of claims 1-9, and the pressure assembly connected to the pneumatic assembly.

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