Breast pump

Abstract

This application relates to the field of maternal and infant product technology and discloses a breast pump, including a main unit, a breast shield, a milk storage container, a nipple channel, a negative pressure chamber assembly, and a waterproof and breathable structure. The main unit includes a negative pressure pump assembly; the breast shield includes a flange and a flange channel; the milk storage container has a milk storage chamber or is enclosed by the breast shield to form a milk storage chamber; and the nipple channel connects the flange channel and the milk storage chamber. The negative pressure chamber assembly includes a negative pressure chamber and a gas-liquid separator that separates the negative pressure chamber into a wet side and a dry side. The dry side gas is connected to the negative pressure pump assembly, and the wet side liquid is connected to the breast shield and the milk storage chamber. The waterproof and breathable structure is disposed between the negative pressure pump assembly and the dry side of the negative pressure chamber. When the breast pump is working, the negative pressure pump assembly drives the gas-liquid separator to deform or reciprocate, thereby creating negative pressure in the nipple channel to draw in milk and store it in the milk storage chamber. This breast pump prevents cleaning water or milk from being drawn into the negative pressure pump assembly, avoiding equipment malfunction.

Description

Technical Field

[0001] This utility model relates to the field of maternal and infant products technology, and in particular to a breast pump. Background Technology

[0002] Breastfeeding is of irreplaceable importance for the growth and development of newborns. To support mothers who are unable to breastfeed directly or who wish to store breast milk for later use, breast pumps have become a very important auxiliary tool.

[0003] In existing breast pumps, variable diaphragms or air bladders are typically used as key components for gas-liquid separation and indirect transmission of negative pressure to the nipple channel. This prevents milk from entering the main unit and causing equipment malfunction, and also avoids contamination of the milk by the air pump or other main unit components. However, during use, there may be situations where the diaphragm ruptures during breast pump use, causing milk to enter the main unit. There may also be situations where the diaphragm or other accessories are not drained after cleaning, resulting in residual cleaning liquid from the diaphragm or other cleaning accessories entering the main unit and causing equipment malfunction.

[0004] However, if the user operates the pump improperly during daily use, it may cause the negative pressure pump to suck in milk or water. The sucked-in milk or water may leak out of the negative pressure pump, which can burn out components such as the motor and the main control board, causing equipment failure. Utility Model Content

[0005] This application provides a breast pump designed to solve the technical problem that improper use by the user can easily cause the negative pressure pump to suck in milk or water.

[0006] According to a first aspect of this application, one embodiment provides a breast pump for drawing and storing milk from a breast, comprising: a main unit, the main unit including a negative pressure pump assembly;

[0007] Breast shields include flanges that seal the breast and flange channels for milk to flow out or for the nipple to protrude;

[0008] A milk storage container, wherein the milk storage container has a milk storage cavity or is formed by enclosing the breast pump shield, and the milk storage cavity is used to store milk;

[0009] Nipple channel, used to accommodate the nipple and connect to the flange channel, and directly or indirectly connect the liquid to the milk storage chamber;

[0010] A negative pressure chamber assembly includes a deformable or reciprocating gas-liquid separator and a negative pressure chamber, wherein the gas-liquid separator separates the negative pressure chamber into a wet side and a dry side with liquid separation.

[0011] The dry side is directly or indirectly connected to the negative pressure pump assembly via gas, and the wet side is directly or indirectly connected to the breast pump shield and the milk storage chamber via liquid. When the breast pump is working, the negative pressure pump assembly drives the gas-liquid separator to deform or reciprocate, so that negative pressure is generated in the nipple channel to draw in milk and store it in the milk storage chamber.

[0012] A waterproof and breathable structure is provided between the negative pressure pump assembly and the dry side of the negative pressure chamber.

[0013] In one embodiment, the waterproof and breathable structure includes a waterproof and breathable membrane that separates the air passage from the dry side of the negative pressure chamber to the negative pressure pump assembly into two liquid-separated parts.

[0014] In one embodiment, the waterproof and breathable membrane is assembled between the dry side of the negative pressure cavity and the negative pressure pump assembly.

[0015] In one embodiment, the dry side of the negative pressure cavity is connected to a negative pressure pump assembly via a gas pipeline, and the waterproof and breathable membrane is fitted inside the pipeline of the negative pressure pump assembly for delivering gas to the nipple channel;

[0016] Alternatively, the main unit includes an air outlet communicating with the dry side of the negative pressure chamber, and the waterproof and breathable membrane is fitted at the air outlet and covers the air outlet.

[0017] In one embodiment, the waterproof and breathable structure further includes a support structure, the support structure including at least one through hole, and the waterproof and breathable membrane is disposed on the support structure and covers the through hole.

[0018] In one embodiment, the support structure is detachably mounted on the side of the gas-liquid separator near the negative pressure pump assembly or detachably mounted on the main unit.

[0019] In one embodiment, the waterproof and breathable membrane is bladder-shaped or planar.

[0020] In one embodiment, the host further includes a first housing, the first housing including a first side and a second side disposed opposite to each other, the first housing having a negative pressure hole extending through from the first side to the second side, the negative pressure pump assembly being disposed on the first side and communicating with the negative pressure hole;

[0021] The waterproof and breathable structure is located on the second side and between the gas-liquid separator and the negative pressure hole.

[0022] In one embodiment, the waterproof and breathable structure is connected to the first housing and covers the negative pressure hole.

[0023] In one embodiment, the waterproof and breathable structure includes a waterproof and breathable membrane, which is connected to the first housing and covers the negative pressure hole;

[0024] Alternatively, the waterproof and breathable structure includes a fastener and a waterproof and breathable membrane. The fastener is connected to the first housing and is arranged circumferentially around the negative pressure hole. The fastener has a perforation, and the waterproof and breathable membrane is connected to the fastener and covers the perforation.

[0025] In one embodiment, the waterproof and breathable membrane is connected to the first housing;

[0026] The waterproof and breathable structure also includes a vent, which is located on the side of the waterproof and breathable membrane opposite to the first housing and abuts against the edge of the waterproof and breathable membrane.

[0027] In one embodiment, the vent and the first housing enclose a receiving cavity, the waterproof and breathable membrane is disposed in the receiving cavity, and the receiving cavity is divided into a first cavity and a second cavity;

[0028] The vent is provided with an air guide hole, which is connected to the first cavity, and the negative pressure hole is connected to the second cavity.

[0029] In one embodiment, the breast pump further includes a cover with a through hole, the gas-liquid separator is bladder-shaped, the cover is disposed over the opening of the gas-liquid separator, and is detachably connected to the first housing;

[0030] The end of the vent far from the waterproof and breathable membrane is inserted and connected to the through hole, so that the air guide hole connects the inner cavity of the first cavity and the gas-liquid separator, or the end of the vent far from the waterproof and breathable membrane is surrounded by the cover to form an air guide cavity, and both the air guide hole and the through hole are connected to the air guide cavity.

[0031] In one embodiment, the first housing is provided with a mounting groove, the mounting groove being recessed along the direction from the second side to the first side, and a protrusion being formed on the first side;

[0032] The negative pressure hole is provided through the wall of the mounting groove, the waterproof and breathable membrane is connected to the wall of the mounting groove, and the vent abuts against the wall of the mounting groove.

[0033] In one embodiment, the wall of the mounting groove includes a bottom wall and a side wall connected to the bottom wall. A step is provided at one end of the side wall opposite to the bottom wall. The waterproof and breathable membrane is connected to the step. The vent is inserted into the mounting groove and abuts against the step.

[0034] The negative pressure hole is formed at one end of the sidewall of the groove near the bottom wall of the groove and / or is formed on the bottom wall of the groove.

[0035] In one embodiment, the breast pump further includes a cover with a through hole, the gas-liquid separator is bladder-shaped, the cover is placed over the opening of the gas-liquid separator, and the through hole communicates with the inner cavity of the gas-liquid separator;

[0036] The waterproof and breathable structure is located between the negative pressure pump assembly and the through hole.

[0037] In one embodiment, the waterproof and breathable structure is connected to the cover and covers the through hole.

[0038] In one embodiment, the waterproof and breathable structure includes a fastener and a waterproof and breathable membrane;

[0039] The fastener is connected to the cover and is arranged circumferentially around the through hole; the fastener has a perforation, and the waterproof and breathable membrane is connected to the fastener and covers the perforation.

[0040] In one embodiment, the waterproof and breathable structure includes a polytetrafluoroethylene membrane;

[0041] And / or, the surface of the waterproof and breathable structure is provided with a hydrophobic layer.

[0042] In one embodiment, the milk storage container is located on the second side, and the milk storage container is further configured with the negative pressure cavity, the negative pressure cavity is connected to the nipple channel and the negative pressure hole, and the gas-liquid separator is located in the negative pressure cavity.

[0043] In one embodiment, the negative pressure chamber is arranged side by side with the nipple channel, and when the breast pump is in operation, the negative pressure chamber is located below the nipple channel;

[0044] The negative pressure chamber has a milk inlet on the side away from the nipple channel. The milk inlet connects the negative pressure chamber and the milk storage chamber. The negative pressure hole and the milk inlet are located on both sides of the gas-liquid separator.

[0045] In one embodiment, the breast shield and / or the milk storage container are provided with the nipple channel.

[0046] The breast pump according to the above embodiment, by providing a waterproof and breathable structure between the negative pressure pump assembly and the gas-liquid separator, allows gas to flow between them, but prevents liquid flow. Therefore, when the negative pressure pump assembly generates negative pressure within the nipple canal, it is unaffected by the waterproof and breathable structure, allowing for normal negative pressure generation within the nipple canal. Furthermore, if the user uses the pump improperly, the waterproof and breathable structure can block liquids, preventing clean water or breast milk from being drawn into the negative pressure pump assembly. Thus, the breast pump provided by this application can prevent clean water or breast milk from being drawn into the negative pressure pump assembly, avoiding equipment malfunction and improving the user experience.

[0047] Beneficial effects:

[0048] The waterproof and breathable design effectively reduces the possibility of a small amount of residual liquid from the dry side of the gas-liquid separator entering the negative pressure pump assembly due to insufficient drainage, thereby effectively reducing the probability of main unit failure and improving the reliability of the breast pump product. Attached Figure Description

[0049] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0050] Figure 1 This is a structural schematic diagram of the breast pump provided in Embodiment 1 of this utility model from one perspective;

[0051] Figure 2 This is a top view of the breast pump provided in Embodiment 1 of this utility model;

[0052] Figure 3 yes Figure 2 A cross-sectional view along line AA;

[0053] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle;

[0054] Figure 5 This is an exploded view of the breast pump provided in Embodiment 1 of this utility model;

[0055] Figure 6 This is an exploded view of the host computer provided in Embodiment 1 of this utility model;

[0056] Figure 7 This is a schematic diagram of the structure of the first housing provided in Embodiment 1 of this utility model;

[0057] Figure 8 yes Figure 7 A magnified view of a section at point C;

[0058] Figure 9 This is a cross-sectional view of the waterproof and breathable membrane provided in Embodiment 1 of this utility model;

[0059] Figure 10 This is a schematic diagram of the structure of the milk storage container provided in Embodiment 1 of this utility model;

[0060] Figure 11 This is a cross-sectional view of the breast pump provided in Embodiment 2 of this utility model;

[0061] Figure 12 yes Figure 11 A magnified view of a section at point D;

[0062] Figure 13 This is a schematic diagram of the structure of the cover provided in Embodiment 2 of this utility model;

[0063] Figure 14 This is an exploded view of the breast pump provided in Embodiment 3 of this utility model;

[0064] Figure 15 This is a schematic diagram of the waterproof and breathable structure provided in Embodiment 3 of this utility model;

[0065] Figure 16 This is a schematic diagram of the assembly structure of the waterproof and breathable structure and the cover provided in Embodiment 3 of this utility model from one perspective;

[0066] Figure 17 This is a schematic diagram of the assembly structure of the waterproof and breathable structure and cover provided in Embodiment 3 of this utility model from another perspective.

[0067] Explanation of icon numbers:

[0068] 100. Breast pump; 10. Main unit; 11. Negative pressure pump assembly; 12. First housing; 121. First side; 122. Second side; 13. Negative pressure port; 14. Second housing; 15. Receiving cavity; 16. Mounting groove; 161. Bottom wall of groove; 162. Side wall of groove; 17. Step; 20. Breast pump shield; 21. Flange; 22. Flange channel; 30. Negative pressure chamber assembly; 31. Gas-liquid separator; 32. Negative pressure chamber; 321. Wet side; 322. 40. Dry side; 41. Waterproof and breathable structure; 42. Waterproof and breathable membrane; 43. Membrane body; 44. First surface; 45. Second surface; 46. Hydrophobic layer; 47. Vent; 48. Air vent; 49. Air guide hole; 40. Fixing element; 41. Perforation; 50. Receiving cavity; 51. First cavity; 52. Second cavity; 60. Cover; 70. Through hole; 80. Air guide cavity; 91. Milk storage container; 92. Milk storage cavity; 93. Nipple channel; 94. Milk inlet.

[0069] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0070] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0071] 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. If the specific posture changes, the directional indicator will also change accordingly.

[0072] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0073] 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.

[0074] Currently, breast pumps are widely used by mothers. However, improper use can cause the negative pressure pump to suck in milk or water. This sucked-in milk or water can leak out of the negative pressure pump, potentially burning out components such as the motor and electronic control board, causing equipment malfunction and resulting in a poor user experience.

[0075] In view of this, the present invention provides a breast pump to prevent milk or water from entering the negative pressure pump, thereby improving the user experience.

[0076] Example 1:

[0077] like Figures 1 to 6 As shown, the breast pump 100 provided in this embodiment of the present invention is used to extract and store breast milk, and includes a main unit 10, a breast shield 20, a milk storage container 90, and a negative pressure chamber assembly 30.

[0078] The main unit 10 includes a negative pressure pump assembly 11, and the breast shield 20 includes a flange 21 for sealing the breast and a flange channel 22 for milk outflow or nipple protrusion. The milk storage container 90 has a milk storage chamber 91 constructed inside or is enclosed by the breast shield 20 to form a milk storage chamber 91, which is used to store milk.

[0079] The negative pressure chamber assembly 30 includes a deformable or reciprocating gas-liquid separator 31 and a negative pressure chamber 32. The gas-liquid separator 31 separates the negative pressure chamber 32 into a wet side 321 and a dry side 322, which are separated by liquid. The dry side 322 is directly or indirectly connected to the negative pressure pump assembly 11 for gas, and the wet side 321 is directly or indirectly connected to the breast pump shield 20 and the milk storage chamber 91 for liquid. By setting the gas-liquid separator 31 to separate the negative pressure chamber 32 into the wet side 321 and the dry side 322, liquid cannot pass through the gas-liquid separator 31 from the wet side 321 into the dry side 322.

[0080] The breast pump 100 also includes a nipple channel 92 for accommodating the nipple and connecting to the flange channel 22, and directly or indirectly communicating with the milk storage chamber 91. In specific applications, the nipple channel 92 can be integrally formed on the flange 21, integrally formed on the milk storage container 90, or integrally formed on a tee connecting the flange 21 and the milk storage container 90. The nipple channel 92 can also be configured as a detachable channel unit. In this embodiment, the nipple channel 92 is integrally formed on the milk storage container 90.

[0081] When the breast pump 100 is working, the negative pressure pump assembly 11 drives the gas-liquid separator 31 to deform or reciprocate, so that negative pressure is generated in the nipple channel 92 to draw in milk and store it in the milk storage chamber 91. In specific applications, the breast shield 20 is placed over the user's breast, with the nipple corresponding to the nipple channel 92. There is an airflow channel between the negative pressure pump assembly 11 and the nipple channel 92. This airflow channel forms the path for the negative pressure pump assembly 11 to generate negative pressure in the nipple channel 92. When the negative pressure pump assembly 11 generates negative pressure, the gas-liquid separator 31 contracts (deforms) or moves under the action of negative pressure. The space between the gas-liquid separator 31 and the negative pressure pump assembly 11 shrinks, and correspondingly, the space between the gas-liquid separator 31 and the nipple channel 92 increases. Since this space is a closed space, when the space increases, the pressure decreases, realizing the suction of the nipple so that milk is drawn out of the breast and flows into the nipple channel 92, and then into the milk storage chamber 91.

[0082] Please see Figures 4 to 6 The breast pump 100 also includes a waterproof and breathable structure 40, which is disposed between the negative pressure pump assembly 11 and the dry side 322 of the negative pressure chamber 32. The waterproof and breathable structure 40 is both waterproof and breathable, allowing gas to flow through it while preventing liquid from passing through.

[0083] By adopting the above technical solution, a waterproof and breathable structure 40 is provided between the negative pressure pump assembly 11 and the dry side 322 of the negative pressure chamber 32. Gas can flow between the negative pressure pump assembly 11 and the dry side 322 of the negative pressure chamber 32 through the waterproof and breathable structure 40, but liquid cannot flow between the negative pressure pump assembly 11 and the dry side 322 of the negative pressure chamber 32. Therefore, when the negative pressure pump assembly 11 generates negative pressure in the nipple channel 92, it is not affected by the waterproof and breathable structure 40 and can generate negative pressure normally in the nipple channel 92. If the user uses the device improperly, such as when cleaning water remains in the inner cavity of the gas-liquid separator 31, or when the main unit 10 is not turned off during disassembly of the breast pump 100 (i.e., the negative pressure pump assembly 11 continues to operate), suction is generated on the milk in the airflow channel between the nipple channel 92 and the gas-liquid separator 31 (where milk can be transported during milk extraction). The waterproof and breathable structure 40 can block the liquid, preventing cleaning water or milk from being sucked into the negative pressure pump assembly 11 through the waterproof and breathable structure 40. Therefore, the breast pump 100 provided in this embodiment can prevent cleaning water or milk from being sucked into the negative pressure pump assembly 11, avoiding equipment malfunction and improving the user experience.

[0084] In one embodiment, the waterproof and breathable structure 40 includes a waterproof and breathable membrane 41 that separates the air passage from the dry side 322 of the negative pressure chamber 32 to the negative pressure pump assembly 11 into two liquid-separated parts. Specifically, the waterproof and breathable membrane 41 is a membrane component that is breathable but not liquid-permeable; that is, gas can pass through the waterproof and breathable membrane 41 to flow, while liquid cannot pass through it. Therefore, the waterproof and breathable membrane 41 can separate the air passage from the dry side 322 of the negative pressure chamber 32 to the negative pressure pump assembly 11 into two liquid-separated parts. In this way, cleaning water or milk will not be drawn into the negative pressure pump assembly 11 through the waterproof and breathable structure 40.

[0085] In one embodiment, a waterproof and breathable membrane 41 is fitted between the dry side 322 of the negative pressure chamber 32 and the negative pressure pump assembly 11. This arrangement allows the waterproof and breathable membrane 41 to separate the air passage from the dry side 322 of the negative pressure chamber 32 to the negative pressure pump assembly 11 into two liquid-separated parts.

[0086] In one embodiment, the dry side 322 of the negative pressure chamber 32 is connected to the negative pressure pump assembly 11 via a gas pipeline, and the waterproof and breathable membrane 41 is installed in the pipeline of the negative pressure pump assembly 11 for delivering gas to the nipple channel 92; alternatively, the main unit 10 includes an air outlet connected to the dry side 322 of the negative pressure chamber 32, and the waterproof and breathable membrane 41 is installed at the air outlet and covers the air outlet. It should be noted that the installation position of the waterproof and breathable membrane 41 is not limited, as long as it is set on the gas path from the dry side 322 of the negative pressure chamber 32 to the negative pressure pump assembly 11, and can separate the gas path from the dry side 322 of the negative pressure chamber 32 to the negative pressure pump assembly 11 into two liquid-separated parts.

[0087] The waterproof and breathable membrane 41 can be fixedly assembled or detachably assembled. When detachable assembly is used, it is convenient to remove the waterproof and breathable membrane 41 for cleaning.

[0088] In one embodiment, the waterproof and breathable structure 40 further includes a support structure, which includes at least one through-hole. The waterproof and breathable membrane 41 is disposed on the support structure and covers the through-hole. By providing the support structure, the installation flexibility of the waterproof and breathable membrane 41 can be improved. Of course, in other embodiments, the waterproof and breathable structure 40 may not have a support structure.

[0089] In one embodiment, the support structure is detachably mounted on the side of the gas-liquid separator 31 near the negative pressure pump assembly 11 (i.e., the dry side 322 of the negative pressure chamber 32) or detachably mounted on the main unit 10. This allows for the removal of the waterproof and breathable membrane 41, facilitating its cleaning.

[0090] In one embodiment, the waterproof and breathable membrane is either bladder-shaped or planar. In this embodiment, the waterproof and breathable membrane is planar. It will be understood that in other embodiments, the waterproof and breathable membrane may be configured in other shapes.

[0091] Please see Figures 6 to 8 The main unit 10 also includes a first housing 12, which includes a first side 121 and a second side 122 disposed opposite to each other. A negative pressure hole 13 (i.e., the air outlet mentioned above) is provided through the first housing 12 along the direction from the first side 121 to the second side 122. The negative pressure pump assembly 11 is disposed on the first side 121 and communicates with the negative pressure hole 13. This arrangement allows the negative pressure pump assembly 11 to generate negative pressure in the nipple channel 92 and also spatially separates the negative pressure pump assembly 11 from other components (such as the gas-liquid separator 31), thereby improving the waterproof performance of the negative pressure pump assembly 11.

[0092] Please see Figure 4 and Figure 6 The main unit 10 also includes a second housing 14, which is connected to the first side 121 of the first housing 12 and together with the first housing 12 forms a receiving cavity 15, in which the negative pressure pump assembly 11 is disposed. This arrangement provides better protection for the negative pressure pump assembly 11. Of course, in specific applications, as an alternative implementation, the main unit 10 may not include the second housing 14.

[0093] In one embodiment, the waterproof and breathable structure 40 is disposed on the second side 122 and is located between the gas-liquid separator 31 and the negative pressure hole 13.

[0094] In one embodiment, the waterproof and breathable structure 40 is connected to the first housing 12 and covers the negative pressure hole 13. This prevents liquid from flowing into the negative pressure hole 13, thereby preventing liquid from being drawn into the negative pressure pump assembly 11.

[0095] Please see Figure 4 The waterproof and breathable structure 40 includes a waterproof and breathable membrane 41, which is connected to the first housing 12 and covers the negative pressure hole 13. In specific applications, the waterproof and breathable membrane 41 has waterproof and breathable properties, allowing gas to flow through it while preventing liquid from passing through.

[0096] In one embodiment, the waterproof and breathable membrane 41 is detachably connected to the first housing 12. This facilitates the removal of the waterproof and breathable membrane 41 for cleaning.

[0097] Please see Figure 4 The waterproof and breathable structure 40 also includes a vent 42, which is located on the side of the waterproof and breathable membrane 41 facing away from the first housing 12 and abuts against the edge of the waterproof and breathable membrane 41. By setting the vent 42 to abut against the edge of the waterproof and breathable membrane 41, the firmness of the connection between the waterproof and breathable membrane 41 and the first housing 12 is improved, preventing the waterproof and breathable membrane 41 from detaching from the first housing 12. It is understood that in other embodiments, the waterproof and breathable structure 40 may not have a vent 42.

[0098] Please see Figure 4 and Figure 6 The vent 42 and the first housing 12 enclose a receiving cavity 50. A waterproof and breathable membrane 41 is disposed within the receiving cavity 50, dividing the receiving cavity 50 into a first cavity 51 and a second cavity 52. ​​The vent 42 is provided with an air guide hole 43, which connects to the first cavity 51, and a negative pressure hole 13 connects to the second cavity 52. ​​In this way, the negative pressure generated by the negative pressure pump assembly 11 can be transmitted within the receiving cavity 50, reducing the negative pressure transmission space and improving the negative pressure transmission efficiency. In specific applications, the negative pressure generated by the negative pressure pump assembly 11 is transmitted sequentially through the negative pressure hole 13, the second cavity 52, the first cavity 51, and the air guide hole 43. Of course, in other embodiments, the vent 42 may not enclose the receiving cavity 50 with the first housing 12; the vent 42 may simply press and fix the waterproof and breathable membrane 41 to the first housing 12.

[0099] Please see Figures 4 to 6The breast pump 100 also includes a cover 60 with a through hole 70. The gas-liquid separator 31 is bladder-shaped, and the cover 60 covers the opening of the gas-liquid separator 31. The through hole 70 connects to the inner cavity of the gas-liquid separator 31. A waterproof and breathable structure 40 is provided between the negative pressure pump assembly 11 and the through hole 70. By providing the cover 60, when there is residual cleaning water in the inner cavity of the gas-liquid separator 31, the cover 60 can prevent some of the cleaning water from being sucked into the negative pressure pump assembly 11. In addition, the main unit 10 also includes a solenoid valve (not shown). The gas-liquid separator 31 expands under the action of the solenoid valve, and combined with the contraction of the gas-liquid separator 31 under the action of the negative pressure pump assembly 11, the pressure in the nipple channel 92 changes, so as to achieve continuous milk extraction. During the contraction and expansion of the gas-liquid separator 31, displacement may occur. By providing the cover 60, it is beneficial to improve the connection stability of the gas-liquid separator 31 and prevent displacement of the gas-liquid separator 31. Furthermore, by adjusting the size or shape of the through hole 70 provided in the cover 60, the intensity or frequency of the negative pressure can be optimized, thereby controlling the comfort and efficiency of suction.

[0100] In this embodiment, the gas-liquid separator 31 is bladder-shaped. In other embodiments, the gas-liquid separator 31 may also be configured with other shapes, such as a planar shape.

[0101] In one embodiment, the cover 60 is detachably connected to the first housing 12. In a specific application, the gas-liquid separator 31 is connected to the cover 60, and the cover 60 is detachably connected to the first housing 12, while the gas-liquid separator 31 is also detachably connected to the first housing 12. This facilitates the cleaning of the gas-liquid separator 31 and the cover 60.

[0102] In one embodiment, the end of the vent 42 furthest from the waterproof and breathable membrane 41 is connected to the through hole 70, so that the vent 43 connects the inner cavity of the first cavity 51 and the gas-liquid separator 31. This allows negative pressure to be directly transmitted to the inner cavity of the gas-liquid separator 31 via the vent 43, causing the gas-liquid separator 31 to contract. The vent 42 is sealed to the cover 60.

[0103] Please see Figures 6 to 8The first housing 12 is provided with a mounting groove 16, which is recessed along the direction from the second side 122 to the first side 121, and forms a protrusion on the first side 121. A negative pressure hole 13 is provided through the groove wall of the mounting groove 16, and a waterproof and breathable membrane 41 is connected to the groove wall of the mounting groove 16, with a vent 42 abutting against the groove wall of the mounting groove 16. By providing the mounting groove 16, the waterproof and breathable membrane 41 is connected to the groove wall of the mounting groove 16, providing a precise positioning space for the waterproof and breathable membrane 41, which helps to improve the connection stability between the waterproof and breathable membrane 41 and the first housing 12. In specific applications, the mounting groove 16 forms a protrusion in the receiving cavity 15, and the negative pressure hole 13 penetrates the groove wall of the mounting groove 16, connecting the mounting groove 16 and the receiving cavity 15, which facilitates the connection of the negative pressure pump assembly 11 in the receiving cavity 15 to the negative pressure hole 13.

[0104] Please see Figure 4 and Figure 8 The mounting groove 16 has a bottom wall 161 and a side wall 162 connected to the bottom wall 161. A step 17 is provided at the end of the side wall 162 facing away from the bottom wall 161. A waterproof and breathable membrane 41 is connected to the step 17. A vent 42 is inserted into the mounting groove 16 and abuts against the step 17. A negative pressure hole 13 is formed at the end of the side wall 162 near the bottom wall 161 and / or on the bottom wall 161. This design improves the connection strength of the waterproof and breathable membrane 41, and the coordinated sealing of the step 17 and the vent 42 effectively prevents liquid leakage from the edge of the waterproof and breathable membrane 41.

[0105] In one embodiment, the vent 42 is detachably inserted into the mounting slot 16. This facilitates cleaning of the vent 42.

[0106] In one embodiment, the waterproof and breathable structure 40 includes a polytetrafluoroethylene (PTFE) membrane. Specifically, the waterproof and breathable membrane 41 can be a PTFE membrane. The PTFE membrane not only allows gas to pass through but prevents liquids from passing through, but also has extremely low surface energy and a contact angle greater than 110°. Liquids (such as water and emulsions) bead up and roll off its surface, making it difficult to wet or remain, thus exhibiting a certain degree of hydrophobicity.

[0107] In one embodiment, please refer to Figure 6 and Figure 9The surface of the waterproof and breathable structure 40 has a hydrophobic layer 412. This hydrophobicity prevents water or emulsion residue from remaining on the structure, thus preventing bacterial growth. In specific applications, the waterproof and breathable structure 40 includes a waterproof and breathable membrane 41, on the surface of which the hydrophobic layer 412 can be provided. In one embodiment, the waterproof and breathable membrane 41 includes a membrane body 411 and a hydrophobic layer 412. The membrane body 411 includes a first surface 4111 and a second surface 4112 disposed opposite to each other. The first surface 4111 is disposed away from the negative pressure pump assembly 11, and the hydrophobic layer 412 is at least disposed on the first surface 4111.

[0108] Please see Figures 5 to 8 The milk storage container 90 is located on the second side 122, and a negative pressure cavity 32 is also constructed inside the milk storage container 90. The negative pressure cavity 32 is connected to the nipple channel 92 and the negative pressure hole 13. The gas-liquid separator 31 is located inside the negative pressure cavity 32.

[0109] In practical applications, the gas-liquid separator 31 is disposed within the negative pressure chamber 32, which can divide the negative pressure chamber 32 into a first chamber (i.e., dry side 322) connected to the negative pressure hole 13 and a second chamber (i.e., wet side 321) connected to the nipple channel 92. When the negative pressure pump assembly 11 generates negative pressure, the gas-liquid separator 31 contracts under the action of negative pressure, causing the first chamber to shrink. Correspondingly, the second chamber enlarges. As the volume of the space formed by the second chamber and the nipple channel 92 increases, the air pressure decreases, thus forming negative pressure in the nipple channel 92, achieving suction of the nipple.

[0110] In one embodiment, please refer to Figures 3 to 5 , Figure 10 The negative pressure chamber 32 is arranged side by side with the nipple channel 92. When the breast pump 100 is in operation, the negative pressure chamber 32 is located below the nipple channel 92. A milk inlet 93 is provided on the side of the negative pressure chamber 32 away from the nipple channel 92, connecting the negative pressure chamber 32 and the milk storage chamber 91. The negative pressure hole 13 and the milk inlet 93 are located on opposite sides of the gas-liquid separator 31. Thus, the negative pressure chamber 32 can also be used to transport breast milk.

[0111] In practical applications, when the expressed milk enters the nipple channel 92, it can flow into the negative pressure chamber 32 under the action of gravity, and then flow into the milk storage chamber 91 through the milk inlet 93. The breast pump 100 is also equipped with a valve body, which is used to allow milk to enter the milk storage chamber 91 from the negative pressure chamber 32, but not from the milk storage chamber 91 into the negative pressure chamber 32.

[0112] In one embodiment, the breast pump shield 20 and / or the milk storage container 90 are provided with a nipple channel 92. In this embodiment, the nipple channel 92 is formed in both the breast pump shield 20 and the milk storage container 90. It is understood that in other embodiments, the nipple channel 92 may also be formed in the breast pump shield 20, or the nipple channel 92 may also be formed in the milk storage container 90.

[0113] Example 2:

[0114] The main difference between this embodiment and the breast pump 100 provided in Embodiment 1 lies in the connection method between the vent 42 and the cover 60. Specifically, in Embodiment 1, the end of the vent 42 away from the waterproof and breathable membrane 41 is connected to the through hole 70 of the cover 60; while in this embodiment, the end of the vent 42 away from the waterproof and breathable membrane 41 is enclosed with the cover 60 to form an air guiding cavity 80.

[0115] Please see Figures 11 to 13 The end of the vent 42 furthest from the waterproof and breathable membrane 41 forms a venting cavity 80 with the cover 60. Both the vent hole 43 and the through hole 70 are connected to the venting cavity 80. In this way, negative pressure is sequentially transmitted through the vent hole 43, the venting cavity 80, and the through hole 70 to the inner cavity of the gas-liquid separator 31, causing the gas-liquid separator 31 to contract. The cover 60 is sealingly connected to the first housing 12 and / or the vent 42.

[0116] Apart from the differences mentioned above, the breast pump 100 and its auxiliary components provided in this embodiment can be designed with reference to Embodiment 1, and will not be described in detail here.

[0117] Example 3:

[0118] The main difference between this embodiment and the breast pump 100 provided in embodiments one and two lies in the connection part of the waterproof and breathable structure 40. Specifically, in embodiment one, the waterproof and breathable structure 40 is connected to the first housing 12; while in this embodiment, the waterproof and breathable structure 40 is connected to the cover 60.

[0119] In one embodiment, the waterproof and breathable structure 40 is connected to the cover 60 and covers the through hole 70. This prevents liquid from flowing into the negative pressure hole 13, thereby preventing liquid from being drawn into the negative pressure pump assembly 11.

[0120] Please see Figures 14 to 17The waterproof and breathable structure 40 includes a fixing member 44 (i.e., the aforementioned support structure) and a waterproof and breathable membrane 41. The fixing member 44 is connected to the cover body 60 and is arranged circumferentially around the through hole 70. The fixing member 44 is provided with a through hole 45 (i.e., the aforementioned guide hole), and the waterproof and breathable membrane 41 is connected to the fixing member 44 and covers the through hole 45. By providing the fixing member 44, the firmness of the waterproof and breathable membrane 41 connected to the cover body 60 can be improved, and the waterproof and breathable membrane 41 can be prevented from falling off due to the deformation of the gas-liquid separator 31. In specific applications, the fixing member 44 is sealed between the cover body 60 and the first housing 12.

[0121] In one embodiment, the fastener 44 is detachably connected between the cover 60 and the first housing 12. This facilitates the removal of the waterproof and breathable membrane 41 for cleaning.

[0122] In this embodiment, the fastener 44 is provided with two perforations 45, and the waterproof and breathable structure 40 is provided with two waterproof and breathable membranes 41, with one waterproof and breathable membrane 41 covering one perforation 45.

[0123] Apart from the differences mentioned above, the breast pump 100 and its auxiliary components provided in this embodiment can be designed with reference to Embodiments 1 and 2, and will not be described in detail here.

[0124] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A breast pump for expressing and storing breast milk, characterized in that, Includes: a main unit, wherein the main unit includes a negative pressure pump assembly; Breast shields include flanges that seal the breast and flange channels for milk to flow out or for the nipple to protrude; A milk storage container, wherein the milk storage container has a milk storage cavity or is formed by enclosing the breast pump shield, and the milk storage cavity is used to store milk; Nipple channel, used to accommodate the nipple and connect to the flange channel, and directly or indirectly connect the liquid to the milk storage chamber; A negative pressure chamber assembly includes a deformable or reciprocating gas-liquid separator and a negative pressure chamber. The gas-liquid separator separates the negative pressure chamber into a wet side and a dry side with liquid separation. The dry side is directly or indirectly connected to a negative pressure pump assembly, and the wet side is directly or indirectly connected to a breast pump shield and a milk storage chamber. When the breast pump is working, the negative pressure pump assembly drives the gas-liquid separator to deform or reciprocate, so that negative pressure is generated in the nipple channel to draw in milk and store it in the milk storage chamber. A waterproof and breathable structure is provided between the negative pressure pump assembly and the dry side of the negative pressure chamber.

2. The breast pump as described in claim 1, characterized in that, The waterproof and breathable structure includes a waterproof and breathable membrane that separates the air path from the dry side of the negative pressure chamber to the negative pressure pump assembly into two liquid-separated parts.

3. The breast pump as described in claim 2, characterized in that, The waterproof and breathable membrane is assembled between the dry side of the negative pressure cavity and the negative pressure pump assembly.

4. The breast pump as described in claim 2, characterized in that, The dry side of the negative pressure cavity is connected to the negative pressure pump assembly via a gas pipeline, and the waterproof and breathable membrane is assembled in the pipeline of the negative pressure pump assembly for delivering gas to the nipple channel; Alternatively, the main unit includes an air outlet communicating with the dry side of the negative pressure chamber, and the waterproof and breathable membrane is fitted at the air outlet and covers the air outlet.

5. The breast pump as described in claim 2, characterized in that, The waterproof and breathable structure also includes a support structure, the support structure including at least one through hole, and the waterproof and breathable membrane is disposed on the support structure and covers the through hole.

6. The breast pump as described in claim 5, characterized in that, The support structure can be detachably mounted on the side of the gas-liquid separator near the negative pressure pump assembly or can be detachably mounted on the main unit.

7. The breast pump as described in claim 2, characterized in that, The waterproof and breathable membrane is either bladder-shaped or planar.

8. The breast pump as described in claim 1, characterized in that, The host also includes a first housing, the first housing including a first side and a second side disposed opposite to each other, the first housing having a negative pressure hole extending through from the first side to the second side, the negative pressure pump assembly being disposed on the first side and communicating with the negative pressure hole; The waterproof and breathable structure is located on the second side and between the gas-liquid separator and the negative pressure hole.

9. The breast pump as described in claim 8, characterized in that, The waterproof and breathable structure is connected to the first housing and covers the negative pressure hole.

10. The breast pump as described in claim 9, characterized in that, The waterproof and breathable structure includes a waterproof and breathable membrane, which is connected to the first housing and covers the negative pressure hole; Alternatively, the waterproof and breathable structure includes a fastener and a waterproof and breathable membrane. The fastener is connected to the first housing and is arranged circumferentially around the negative pressure hole. The fastener has a perforation, and the waterproof and breathable membrane is connected to the fastener and covers the perforation.

11. The breast pump as described in claim 10, characterized in that, The waterproof and breathable membrane is connected to the first housing; The waterproof and breathable structure also includes a vent, which is located on the side of the waterproof and breathable membrane opposite to the first housing and abuts against the edge of the waterproof and breathable membrane.

12. The breast pump as described in claim 11, characterized in that, The vent and the first housing enclose a cavity to form a receiving cavity, and the waterproof and breathable membrane is disposed in the receiving cavity, dividing the receiving cavity into a first cavity and a second cavity; The vent is provided with an air guide hole, which is connected to the first cavity, and the negative pressure hole is connected to the second cavity.

13. The breast pump as described in claim 12, characterized in that, The breast pump also includes a cover with a through hole, the gas-liquid separator is bladder-shaped, the cover is placed over the opening of the gas-liquid separator, and is detachably connected to the first housing; The end of the vent far from the waterproof and breathable membrane is inserted and connected to the through hole, so that the air guide hole connects the inner cavity of the first cavity and the gas-liquid separator, or the end of the vent far from the waterproof and breathable membrane is surrounded by the cover to form an air guide cavity, and both the air guide hole and the through hole are connected to the air guide cavity.

14. The breast pump as described in claim 11, characterized in that, The first housing is provided with a mounting groove, which is recessed along the direction from the second side to the first side, and a protrusion is formed on the first side; The negative pressure hole is provided through the wall of the mounting groove, the waterproof and breathable membrane is connected to the wall of the mounting groove, and the vent abuts against the wall of the mounting groove.

15. The breast pump as described in claim 14, characterized in that, The mounting groove has a bottom wall and a side wall connected to the bottom wall. A step is provided at one end of the side wall opposite to the bottom wall. The waterproof and breathable membrane is connected to the step. The vent is inserted into the mounting groove and abuts against the step. The negative pressure hole is formed at one end of the sidewall of the groove near the bottom wall of the groove and / or is formed on the bottom wall of the groove.

16. The breast pump as described in claim 1, characterized in that, The breast pump also includes a cover with a through hole, the gas-liquid separator is bladder-shaped, the cover is placed over the opening of the gas-liquid separator, and the through hole communicates with the inner cavity of the gas-liquid separator; The waterproof and breathable structure is located between the negative pressure pump assembly and the through hole.

17. The breast pump as described in claim 16, characterized in that, The waterproof and breathable structure is connected to the cover and covers the through hole.

18. The breast pump as described in claim 17, characterized in that, The waterproof and breathable structure includes fasteners and a waterproof and breathable membrane; The fastener is connected to the cover and is arranged circumferentially around the through hole; the fastener has a perforation, and the waterproof and breathable membrane is connected to the fastener and covers the perforation.

19. The breast pump as described in any one of claims 1 to 18, characterized in that, The waterproof and breathable structure includes a polytetrafluoroethylene membrane; And / or, the surface of the waterproof and breathable structure is provided with a hydrophobic layer.

20. The breast pump as described in any one of claims 8 to 12, characterized in that, The milk storage container is located on the second side, and the milk storage container is also equipped with the negative pressure cavity. The negative pressure cavity is connected to the nipple channel and the negative pressure hole, and the gas-liquid separator is located in the negative pressure cavity.

21. The breast pump as described in claim 20, characterized in that, The negative pressure chamber is arranged side by side with the nipple channel. When the breast pump is in operation, the negative pressure chamber is located below the nipple channel. The negative pressure chamber has a milk inlet on the side away from the nipple channel. The milk inlet connects the negative pressure chamber and the milk storage chamber. The negative pressure hole and the milk inlet are located on both sides of the gas-liquid separator.

22. The breast pump as described in any one of claims 1 to 18, characterized in that, The breast shield and / or the milk storage container are provided with the nipple channel.

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