Breast pump

Abstract

The utility model relates to the technical field of breast pumps, in particular to a breast pump which comprises a shell, the shell is provided with a shell installation cavity and a cover body assembly connected to the shell installation cavity, and the cover body assembly comprises a horn cover and a breast pumping cavity communicated with the horn cover. A first negative pressure cavity and a second negative pressure cavity which are communicated are formed between the cover body assembly and the shell, the first negative pressure cavity is located on the side close to the horn cover, the second negative pressure cavity is located on the side far away from the horn cover, a deformation area is arranged on the side, close to the first negative pressure cavity, of the horn cover and / or the milk sucking cavity, and the deformation area is located on the side far away from the horn cover. And the deformation area is made of an elastic material. The breast stretching into the breast sucking cavity can be squeezed and stimulated through the elastic deformation area, the natural sucking rhythm of a baby can be simulated, the breast sucking efficiency is effectively improved, and meanwhile the use experience of a user is better improved.

Description

Technical Field

[0001] This utility model relates to the field of breast pump technology, specifically 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. 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, breast pumps need to be improved to increase the efficiency of milk extraction and 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 express milk, the technical solution adopted by this utility model is as follows:

[0006] A breast pump includes a housing, the housing having a housing mounting cavity and a cover assembly connected to the housing mounting cavity, the cover assembly including a horn cover and a milk suction chamber communicating with the horn cover, a first negative pressure chamber and a second negative pressure chamber communicating between the cover assembly and the housing, the first negative pressure chamber being located on the side closer to the horn cover, and the second negative pressure chamber being located on the side farther from the horn cover, the horn cover and / or the milk suction chamber having a deformation zone on the side closer to the first negative pressure chamber, the deformation zone being made of an elastic material.

[0007] Furthermore, in some embodiments of this utility model, the first negative pressure chamber is arranged around the opening of the milk suction chamber, the deformation area is provided with a deformation structure, and multiple deformation structures are provided and spaced apart.

[0008] Furthermore, in some embodiments of this utility model, the deformable structure is provided with a pressing part near the horn cover, and the pressing part is respectively provided with a first clamping end, a second clamping end protruding towards the center of the horn cover, and a fitting end located between the first clamping end and the second clamping end.

[0009] Furthermore, in some embodiments of this utility model, the cover assembly includes a support member located between the housing and the milk suction chamber, the first negative pressure chamber is located between the support member and the milk suction chamber, the outer side of the support member abuts against the inner wall of the housing mounting cavity, and the hardness of the support member is greater than the hardness of the milk suction chamber on the side near the horn cover.

[0010] Furthermore, in some embodiments of this utility model, the deformable structure is provided with a squeezing part near the horn cover, a protrusion connected to the squeezing part and located in the first negative pressure cavity, and a first gap is provided between the protrusion and the support member.

[0011] Furthermore, in some embodiments of this utility model, a support rib is provided between the horn cover and the outer side of the milk suction chamber to abut against the support member. The support rib is provided with a first abutting end, a second abutting end, and a clearance opening located between the first abutting end and the second abutting end respectively. Multiple support ribs are provided and spaced apart. Multiple support ribs and the support member surround to form a first negative pressure chamber.

[0012] Furthermore, in some embodiments of this utility model, the milk suction chamber is provided with an extension portion extending outward therefrom, the extension portion being provided with a first opening of the extension portion communicating with the first negative pressure chamber, a second opening of the extension portion communicating with the second negative pressure chamber, and a connecting channel connecting the first opening of the extension portion and the second opening of the extension portion.

[0013] 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 mounting cavity. The sealing end is arranged along the outer periphery of the extension. The second negative pressure cavity is located within the space enclosed by the sealing end, the extension, and the inner side of the housing mounting cavity. A deformation gap is provided between the sealing end and the end of the extension.

[0014] 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.

[0015] Furthermore, in some embodiments of the present invention, the outer side of the cover assembly is provided with a flow guide near the first opening of the extension and for guiding 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.

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

[0017] This invention features a first negative pressure chamber and a second negative pressure chamber that are connected. Since the first negative pressure chamber is located near the horn cover, when gas enters the second negative pressure chamber, it can move from the second negative pressure chamber to the first negative pressure chamber, forming an effective negative pressure area. This helps ensure the consistency of milk expression. Furthermore, the elastic deformation zone can squeeze and stimulate the breast inserted into the milk expression chamber, which helps to simulate the natural sucking rhythm of an infant. This effectively improves milk expression efficiency and enhances the user experience. Attached Figure Description

[0018] Figure 1 This is a front view of one embodiment of the present utility model.

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

[0020] Figure 3 This is a schematic diagram of the cover assembly of this utility model.

[0021] Figure 4 This is an exploded view of one embodiment of the present invention.

[0022] Figure 5 This is an exploded view and a partial enlarged view from another perspective of one embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of another embodiment of the present invention.

[0024] Figure 7 for Figure 6 BB cross-sectional view.

[0025] Figure 8 for Figure 7 Enlarged view of part D.

[0026] Figure 9 for Figure 6 Another sectional view of BB.

[0027] Figure 10 for Figure 6 CC section view.

[0028] Figure 11 This is an exploded view and a partially enlarged view of another embodiment of the present invention.

[0029] Figure 12 This is an exploded view and a partially enlarged view of another embodiment of the present invention.

[0030] Figure 13 This is a front view of another embodiment of the present invention.

[0031] Figure 14 for Figure 13 EE sectional view.

[0032] Figure 15 This is a schematic diagram of the cover assembly in another embodiment of the present invention. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] Example 1

[0037] like Figures 1 to 12 A breast pump is shown, comprising a housing 1, wherein the housing 1 has a housing mounting cavity 11 and a cover assembly 2 connected to the housing mounting cavity 11. The cover assembly 2 includes a horn cover 20 and a milk suction chamber 21 communicating with the horn cover 20. A first negative pressure chamber 4 and a second negative pressure chamber 5 are provided between the cover assembly 2 and the housing 1. The first negative pressure chamber 4 is located on the side closer to the horn cover 20, and the second negative pressure chamber 5 is located on the side away from the horn cover 20. A deformation zone 26 is provided on the side of the horn cover 20 and / or the milk suction chamber 21 near the first negative pressure chamber 4. The deformation zone 26 is made of an elastic material.

[0038] This invention reduces discomfort during breast compression and stimulation, thus improving the user experience. Specifically, by setting up a connected first negative pressure chamber 4 and a second negative pressure chamber 5, the first negative pressure chamber 4, being close to the horn cover 20, allows gas to move into the first negative pressure chamber 4 when it enters the second negative pressure chamber 5, forming an effective negative pressure area. This helps ensure consistent milk expression, and the elastic deformation zone 26 can compress and stimulate the breast inserted into the milk expression chamber 21, mimicking the natural sucking rhythm of an infant and improving milk expression efficiency while enhancing the user experience.

[0039] In addition, this invention can also avoid the problem of local swelling and pain caused by negative pressure pulling on the breast during the suction process when the suction bowl is deformed and forms a negative pressure between it and the bowl groove in the prior art. This invention can reduce nipple pain and discomfort during the breast compression stimulation process by squeezing the breast and even the areola.

[0040] Furthermore, as a preferred embodiment of this utility model and not a limitation, the cover assembly 2 is connected within the housing mounting cavity 11. The housing 1 provides a certain degree of protection and support for the cover assembly 2. A first negative pressure cavity 4 and a second negative pressure cavity 5 are formed between the housing 1 and the cover assembly 2, allowing pressure changes to occur simultaneously in both negative pressure cavities. This enables airflow to move between the first negative pressure cavity 4 and the second negative pressure cavity 5, thereby driving the deformation zone through negative pressure changes, causing deformation at the location of the horn cover 20 or the milk suction cavity 21 near the first negative pressure 4. The elastic deformation zone 26 can deform under external force to stimulate and squeeze the breast, thus mimicking the natural sucking action of an infant.

[0041] Optionally, in some embodiments, the housing 1 is provided with a negative pressure channel 6 communicating with the second negative pressure chamber 5. When gas enters the second negative pressure chamber from the negative pressure channel, the gas can enter the first negative pressure chamber from the second negative pressure chamber, forming an effective negative pressure area.

[0042] Optionally, in some embodiments, the cover assembly 2 and the deformation area are made of silicone or rubber.

[0043] Optionally, in some embodiments, the horn cover, the milk suction chamber, and the deformation area are integrally molded to facilitate disassembly and cleaning.

[0044] Optionally, in some embodiments, when the pressure assembly is operating, gas can enter the second negative pressure chamber 5 from the first negative pressure chamber 4, or enter the first negative pressure chamber 4 from the second negative pressure chamber 5.

[0045] Optionally, in some embodiments, a reduced outer diameter from the flare cover to the other end of the milk-feeding chamber helps to create a better seal when the cover assembly comes into contact with the breast. When the pressure within the negative pressure chamber changes, the cover assembly deforms accordingly, thus fitting more tightly to the surface and reducing the possibility of gas leakage.

[0046] Optionally, in some embodiments, the trumpet-shaped design of the horn cover facilitates the insertion of the breast into the milk suction chamber. The horn cover fits better around the breast, providing a better seal and preventing gas leakage. This ensures the stability of the internal negative pressure environment when the first and second negative pressure chambers are working. Furthermore, during the generation of negative pressure, it can apply a relatively uniform force to the breast, simulating a more natural and comfortable sucking or squeezing effect.

[0047] like Figure 2 , Figure 3 , Figure 4 , Figure 6 and Figure 7 The breast pump shown has a first negative pressure chamber 4 arranged around the opening of the breast pumping chamber 21, and a deformation zone 26 provided with a deformation structure 28, wherein a plurality of deformation structures 28 are provided and spaced apart.

[0048] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the first negative pressure chamber is arranged around the opening of the milk suction chamber 21. This arrangement helps to ensure that the negative pressure is distributed more evenly in the milk suction chamber, avoids excessive deformation or damage to the deformation zone in a local area due to excessive negative pressure, and also improves the adaptability of the cover assembly to breasts of different sizes.

[0049] Specifically, the deformable structure can produce more flexible deformation under negative pressure, which can produce a gentle massage and squeezing effect on the breast. During breastfeeding, it helps to promote the flow of milk in the breast, prevent milk stasis, further improve the efficiency of milk extraction, and at the same time, it can also relieve discomfort symptoms such as breast engorgement to some extent.

[0050] Optionally, in some embodiments, multiple spaced deformable structures are provided on the horn cover and / or the milk suction chamber, and the connection positions between the deformable structures provide additional deformation space for the cover assembly. Specifically, the connection positions between the deformable structures are grooves 29. The deformable structures can deform in a predetermined manner under negative pressure. The grooves help the deformable structures to return to their original shape more quickly after the pressure is released, thereby improving the elasticity and durability of the cover assembly.

[0051] Optionally, in some embodiments, the horn cover has a deformable structure that allows the squeezing part to squeeze and stimulate the breast near the horn cover.

[0052] Optionally, in some embodiments, the milk suction chamber is provided with a deformable structure, which enables the squeezing part to squeeze and stimulate the breast near the milk suction chamber.

[0053] Optionally, in some embodiments, the horn cover and the milk suction chamber are both provided with deformable structures, which enable the squeezing part to simultaneously squeeze and stimulate the breast at the position close to the horn cover and the milk suction chamber.

[0054] like Figures 1 to 4 The illustrated breast pump features a deformable structure 28 with a squeezing section 281 near the horn cover 20. The squeezing section 281 has a first clamping end 2811, a second clamping end 2812, and a contacting end 2813 protruding towards the center of the horn cover 20. During pumping, when negative pressure causes deformation in the deformable area, the squeezing section simulates the squeezing and massaging action of a baby's lips on the nipple and areola during sucking. The first and second clamping ends clamp from both sides, and the arc-shaped contacting end provides a gentle, embracing stimulation to the breast, promoting smoother milk flow towards the nipple and improving milk drainage efficiency. The targeted squeezing and massaging effect also helps to unclog the milk ducts. Especially for postpartum women whose milk ducts are not very clear in the early postpartum period, the repeated action of the squeezing part can help open up the milk ducts, prevent problems such as milk stasis and lumps, and further ensure that milk can be smoothly expressed, thus maintaining the health of the breasts.

[0055] Because the compression part is designed around the perimeter of the opening of the breast shield, its structure can better conform to the natural contour of the breast. When breasts of different shapes and sizes come into contact with the breast shield, the elastic compression part makes the fit between the breast shield and the breast more close and natural, reducing the possibility of air leakage. It also avoids uneven suction caused by a loose fit, thus improving the user's comfort during breastfeeding.

[0056] like Figure 2 and Figure 7 The breast pump shown has multiple squeezing parts 281 arranged around the circumference of the horn cover 20, and the multiple squeezing parts 281 are symmetrically arranged.

[0057] Optionally, in some embodiments, the compression parts are provided with four symmetrically arranged around the opening of the flared cover. The elastic compression parts compress the breast from four directions toward the center of the flared cover opening, making the fit between the flared cover and the breast more tight.

[0058] Optionally, in some embodiments, the compression portion has two symmetrically arranged around the opening of the flared cover. The elastic compression portion compresses the breast from both directions toward the center of the flared cover opening, making the fit between the flared cover and the breast more snug.

[0059] like Figure 2 and Figure 7 The breast pump shown includes a cover assembly 2 comprising a support member 3 located between the housing 1 and the milk suction chamber 21, a first negative pressure chamber 4 located between the support member 3 and the milk suction chamber 21, the outer side of the support member 3 abutting against the inner wall of the housing mounting cavity 11, and the hardness of the support member 3 being greater than the hardness of the milk suction chamber 21 on the side near the horn cover 20.

[0060] Furthermore, as a preferred embodiment of this utility model and not a limitation thereof, the support member provides additional support between the milk suction chamber and the housing, enhancing the structural stability of the entire air path. This helps prevent excessive deformation or damage to the housing assembly under negative pressure, ensuring the long-term stable operation of the air path. The outer side of the support member abuts against the inner wall of the housing mounting cavity, helping to reduce the gap between the outer wall of the milk suction chamber and the inner wall of the housing mounting cavity, more effectively preventing air leakage and ensuring effective transmission of negative pressure.

[0061] Specifically, the support component has a higher hardness than the side of the milk suction chamber near the horn cover. On the one hand, this can protect the cover assembly from damage caused by external impacts or wear to a certain extent, extending the service life of the cover assembly and reducing maintenance costs. On the other hand, it can more accurately control the deformation of the squeezing part to meet different application needs.

[0062] Alternatively, in some embodiments, the support may be made of rigid plastic.

[0063] 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.

[0064] like Figures 2 to 12 The breast pump shown has a support rib 27 that abuts against the support member 3 between the horn cover 20 and the outer side of the milk suction chamber 21. 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 surround to form a first negative pressure chamber 4.

[0065] 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 outer wall of the milk suction chamber 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 milk suction chamber and together with the support member forms the first negative pressure chamber, which improves the structural stability of the entire air path and helps to prevent the milk suction chamber from undergoing excessive deformation under negative pressure, ensuring that the air path can work stably for a long time.

[0066] Specifically, the spaced arrangement of the support ribs disperses stress under negative pressure, reducing damage to the milk suction chamber caused by stress concentration. This helps extend the service life of the milk suction chamber 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 influences the distribution and deformation pattern of the negative pressure on the squeezing part. The negative pressure can drive the squeezing part to deform in each area, thereby more precisely controlling the deformation of the entire squeezing part.

[0067] When using the breast pump, place the horn cover 20 against the breast; insert the nipple into the milk suction chamber 21, and wrap the areola with the corresponding protruding part of the horn cover 20, while applying a certain pre-pressure to the areola; after the breast pump is turned on, when the air pump and solenoid valve on the pressure component draw air out of the first negative pressure chamber 4 through the negative pressure channel 6, the first negative pressure chamber 4 forms a vacuum, and the protruding part corresponding to the squeezing part 281 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 bottle through the one-way valve;

[0068] 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.

[0069] Example 2

[0070] Example 2, based on Example 1, also has the following implementation method:

[0071] like Figure 2 and Figure 7 The breast pump shown has a breast pump chamber 21 with an extension 251 extending outward therefrom. The extension 251 has a first opening 2511 communicating with the first negative pressure chamber 4, a second opening 2512 communicating with the second negative pressure chamber 5, and a connecting channel 23 connecting the first opening 2511 and the second opening 2512.

[0072] Specifically, the connecting channel 23 is located between the inner wall of the housing mounting cavity 11 and the outer wall of the milk suction cavity 21. The portion of the outer wall of the milk suction cavity 21 that protrudes towards the housing 1 separates the first negative pressure cavity 4 and the second negative pressure cavity 5 between the housing 1 and the cover assembly 2, and the connecting channel 23 is located on the protruding portion of the outer wall of the milk suction cavity 21.

[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 extrusion portion can deform under the drive of the negative pressure change in the first negative pressure chamber.

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

[0075] Optionally, in some embodiments, the outer diameter of the extension is larger than the inner diameter of the milk suction 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 extrusion section can be controlled more flexibly, avoiding excessive local pressure or uneven deformation of the extrusion section, thereby improving the adaptability and service life of the extrusion section. 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 gas circuit assembly.

[0077] like Figure 8 The breast pump shown has an extension 251 with a sealing end 2514 that abuts against the inner side of the housing mounting cavity 11. The sealing end 2514 is arranged along the outer periphery of the extension 251. The second negative pressure cavity 5 is located in the space formed by the sealing end 2514, the extension 251, and the inner side of the housing mounting cavity 11. A deformation gap 25141 is provided between the sealing end 2514 and the end of the extension 251.

[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 housing and cover assembly. When the sealing end is positioned along the outer periphery of the extension and tightly abuts against the inner side of the housing mounting cavity, air leakage can be effectively prevented, improving the sealing performance of the air circuit assembly. The sealing end, the extension, and the inner side of the housing mounting cavity together 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 7 to 12The breast pump shown has a housing 1 with a guide flange 12 protruding toward the extension 251. The second negative pressure chamber 5 has a flow guide cavity 51 located between the housing mounting cavity 11 and the guide flange 12. The flow guide cavity 51 is connected to the negative pressure channel 6. The second opening 2512 of the extension faces the flow guide cavity 51. The flow guide cavity 51 is annularly arranged and has a flow outlet 511 facing the second opening 2512 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 housing but also serves to guide airflow by forming a guide cavity with the inner wall of the housing mounting cavity. 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 milk suction chamber is large, the space of the second negative pressure chamber is larger. When the breast is inserted into the milk suction chamber, the end of the milk suction chamber can deform to a certain extent, thereby creating negative pressure in the milk suction chamber. When the distance between the guide flange and the end of the milk suction chamber is small, the space of the second negative pressure chamber is smaller. When the breast is inserted into the milk suction chamber, the airflow quickly enters the second opening of the extension through the guide chamber, and enters the first negative pressure chamber through the connecting channel, thereby squeezing and stimulating the breast near the opening of the horn cover or the milk suction chamber.

[0082] like Figures 7 to 12 As shown, the outer side of the cover assembly 2 is provided with a flow guide 252 near the first opening 2511 of the extension and for guiding the flow. The flow guide 252 is provided with a flow guide surface 2521 on the side facing the first opening 2511 of the extension.

[0083] Furthermore, as a preferred embodiment of the present invention 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 the negative pressure suction process.

[0084] Optionally, in some embodiments, a pressure component is included connected to the negative pressure channel 6. The connecting channel 23 is arranged in a straight line. Specifically, the straight-line arrangement of the connecting channel reduces the turning and obstruction of 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 the negative pressure suction process.

[0085] Specifically, the design of the guide section and its guide surface facing the first opening of the extension section guide the airflow. This allows the airflow to enter the first negative pressure chamber more directly from the connecting channel, or from the first negative pressure chamber to the first opening of the extension section, thereby enhancing the negative pressure suction effect.

[0086] Alternatively, in some embodiments, the pressure assembly is not limited to components such as a motor, pump body, solenoid valve, and control unit.

[0087] Optionally, in some embodiments, a pressure component is connected to the negative pressure channel to cause pressure changes in the first and second negative pressure chambers. The pressure component can be an electric vacuum pump, a microprocessor-controlled air pump, an electromagnetic pump, or other devices capable of automatically adjusting pressure, or it can be a manually operated manual airbag, a manual piston, or other devices. The negative pressure channel is fixedly mounted on the housing, which can reduce problems such as air path deviation and misalignment during the use of the housing assembly, ensuring smooth airflow and consistency in the suction process.

[0088] like Figures 2 to 5 , Figures 7 to 12 The breast pump shown has a horn cover 20 with a first engaging portion 241, an extension portion 251 with a second connecting groove 2513, and a support member 3 with a first limiting portion 31 that cooperates with the first engaging portion 241 and a second engaging portion 32 that cooperates with the second connecting groove 2513.

[0089] Furthermore, as a preferred embodiment of the present invention and not a limitation thereof, the cooperation between the first engaging part and the first limiting part, and the second connecting groove and the second engaging part, can ensure a stable connection between the milk suction chamber and the support member. The high connection strength and stability help prevent loosening or detachment during use.

[0090] Specifically, the snap-fit ​​design allows for easy disassembly and reassembly of the pump chamber and support components, facilitating thorough cleaning and sterilization after use and ensuring the hygiene of the breast pump. Users simply align the corresponding connectors and press gently to complete the connection, simplifying assembly and improving the user experience.

[0091] Specifically, the support component is connected to the milk suction chamber and extension via a snap-fit ​​connection, providing additional strength to the entire structure. This helps ensure that the entire shield assembly can withstand certain pressure and tension during use, thereby extending its service life. By adjusting the design of the milk suction chamber, the support component can be adapted to different models or specifications of flared shields and milk suction chambers. This improves the flexibility and applicability of the breast pump, allowing more users to choose a product that suits their needs.

[0092] Optionally, in some embodiments, the first engaging portion and the first limiting portion can be tightly connected by an interference fit.

[0093] Optionally, in some embodiments, the first engaging portion and the first limiting portion can be tightly connected by means of a slot connection.

[0094] Optionally, in some embodiments, the second engaging portion and the second connecting groove can be connected by engaging.

[0095] Of course, in some other embodiments, the first engaging portion may be disposed on the support member, and the first limiting portion may be disposed on the speaker cover.

[0096] Of course, in some other embodiments, the second engaging portion may be provided on the extension portion, and the second connecting groove may be provided on the support member.

[0097] The negative pressure generated by the pressure component is transmitted to the second negative pressure chamber 5 through the negative pressure channel 6, and then the negative pressure is reasonably distributed to the first negative pressure chamber 4 through the connecting channel 23. The connecting channel 23 is located on the cover assembly 2 so that the first negative pressure chamber 4 and the second negative pressure chamber 5 are connected. When the pressure component is working, 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 assembly 2, or enter the first negative pressure chamber 4 from the second negative pressure chamber 5 through the connecting channel 23 on the cover assembly 2.

[0098] Example 3

[0099] The difference between Embodiment 3 and Embodiment 2 is that the connecting channel 23 is located on the housing 1, so that the first negative pressure chamber 4 and the second negative pressure chamber 5 are connected. When the pressure assembly is working, gas can enter the second negative pressure chamber 5 from the first negative pressure chamber 4 through the connecting channel 23 on the housing 1, or enter the first negative pressure chamber 4 from the second negative pressure chamber 5 through the connecting channel 23 on the housing 1. Specifically, the inner wall of the housing mounting cavity 11 has a portion protruding towards the cover assembly 2 to separate the first negative pressure chamber 4 and the second negative pressure chamber 5 between the housing 1 and the cover assembly 2, and the connecting channel 23 is located on the protruding portion of the inner wall of the housing mounting cavity 11.

[0100] Example 4

[0101] The difference between Embodiment 4 and Embodiment 2 is that the connecting channel 23 is partly located on the protruding part of the inner wall of the housing mounting cavity 11 and partly located on the protruding part of the outer wall of the milk suction cavity 21. When the housing 1 is connected to the cover assembly 2, it can be enclosed to form the connecting channel 23.

[0102] Example 5

[0103] The difference between Example 5 and Example 1 is as follows: Figures 13 to 15The breast pump shown has a deformable structure 28 with a squeezing part 281 near the horn cover 20 and a protrusion 282 connected to the squeezing part 281 and located in the first negative pressure chamber 4. A first gap 260 is provided between the protrusion 282 and the support member 3.

[0104] Specifically, the deformation zone achieves the effect of an infant sucking by expanding and contracting the area inward and expanding outward through the filling and releasing of negative pressure. When the deformation of the deformation zone reaches a certain amount, the first gap provides space for the protrusion to deform. The protrusion located in the first negative pressure chamber moves in the first gap. When the protrusion located inside the first negative pressure chamber moves inward, it drives the squeezing part outside the first negative pressure chamber to move in the same direction.

[0105] Optionally, in some embodiments, the protrusion moves within the first gap and abuts against the support, thus allowing the deformation of the protrusion to be controlled by a limiting mechanism. When the negative pressure in the first negative pressure chamber changes again, the elastic protrusion can transition from the abutting state with the support to a reset state.

[0106] Of course, in this embodiment, the extrusion part 281 may also have a first clamping end 2811, a second clamping end 2812 and a fitting end 2813 to improve the extrusion efficiency.

[0107] 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 breast pump comprising a housing (1), characterized in that: The shell (1) is provided with a shell mounting cavity (11), a cover assembly (2) connected to the shell mounting cavity (11), the cover assembly (2) comprising a horn cover (20) and a milk suction cavity (21) in communication with the horn cover (20), a first negative pressure cavity (4) and a second negative pressure cavity (5) in communication between the cover assembly (2) and the shell (1), the first negative pressure cavity (4) being located on the side close to the horn cover (20), the second negative pressure cavity (5) being located on the side away from the horn cover (20), the horn cover (20) and / or the milk suction cavity (21) being provided with a deformation zone (26) on the side close to the first negative pressure cavity (4), the deformation zone (26) being made of elastic material.

2. A breast pump according to claim 1, characterised in that: The first negative pressure cavity (4) is arranged along the periphery of the opening of the milk suction cavity (21), the deformation zone (26) is provided with a deformation structure (28), and the deformation structure (28) is provided with a plurality of deformation structures (28) and is arranged at intervals.

3. A breast pump according to claim 2, wherein: The deformation structure (28) is provided with a pressing portion (281) close to the horn cover (20), the pressing portion (281) is respectively provided with a first clamping end (2811) protruding towards the center of the horn cover (20), a second clamping end (2812), and a fitting end (2813) located between the first clamping end (2811) and the second clamping end (2812).

4. A breast pump according to claim 2, wherein: The cover assembly (2) comprises a support (3) located between the shell (1) and the milk suction cavity (21), the first negative pressure cavity (4) is located between the support (3) and the milk suction cavity (21), the outer side of the support (3) abuts against the inner wall of the shell mounting cavity (11), and the hardness of the support (3) is greater than the hardness of the side of the milk suction cavity (21) close to the horn cover (20).

5. A breast pump according to claim 4, wherein: The deformation structure (28) is provided with a pressing portion (281) close to the horn cover (20), a protrusion (282) connected to the pressing portion (281) and located in the first negative pressure cavity (4), and a first gap (260) between the protrusion (282) and the support (3).

6. A breast pump according to claim 4, wherein: The horn cover (20) and the outer side of the milk suction cavity (21) are provided with a support rib (27) abutting against the support (3), the support rib (27) is provided with a first abutting end (271), a second abutting end (272), and a avoiding opening (273) located between the first abutting end (271) and the second abutting end (272), the support rib (27) is provided with a plurality of support ribs (27) and is arranged at intervals, and the plurality of support ribs (27) and the support (3) form a first negative pressure cavity (4).

7. A breast pump according to claim 1, wherein: The milk suction cavity (21) is provided with an extension part (251) extending outwardly, the extension part (251) is provided with an extension part first opening (2511) in communication with the first negative pressure cavity (4), an extension part second opening (2512) in communication with the second negative pressure cavity (5), and a connecting channel (23) connected between the extension part first opening (2511) and the extension part second opening (2512).

8. A breast pump according to claim 7, wherein: An end of the extension part (251) is provided with a sealing end (2514) abutting the inner side of the shell mounting cavity (11), the sealing end (2514) is arranged along the outer periphery of the extension part (251), the second negative pressure cavity (5) is located in a space enclosed by the sealing end (2514), the extension part (251), and the inner side of the shell mounting cavity (11), and a deformation gap (25141) is provided between the sealing end (2514) and the end of the extension part (251).

9. A breast pump according to claim 7, wherein: The second negative pressure cavity (5) is located on the side away from the first opening (22), the shell (1) is provided with a guide flange (12) protruding towards the extension part (251), and a negative pressure channel (6) in communication with the second negative pressure cavity (5), the second negative pressure cavity (5) is provided with a guide flow cavity (51) located between the inner side of the shell (1) and the guide flange (12), the guide flow cavity (51) is in communication with the negative pressure channel (6), the guide flow cavity (51) is annularly arranged and is provided with a guide flow port (511) facing the extension part second opening (2512).

10. A breast pump according to claim 7, wherein: The outer side of the cover assembly (2) is provided with a guide flow part (252) close to the extension part first opening (2511) and used for guiding flow, the guide flow part (252) is provided with a guide flow surface (2521) on the side facing the extension part first opening (2511).

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