Breast sucking mechanism of breast pump

Abstract

The utility model relates to the technical field of breast pumps, and provides a breast pumping mechanism of a breast pump, which is directly communicated with an air pressure adjusting device through a breast pumping cavity of a breast pumping part, and eliminates a complex structure which depends on a deformation air bag part (such as a suction bowl) to generate air pressure change in a traditional breast pump. As the pressure of the milk suction cavity does not need to be indirectly adjusted through airbag deformation, the air pressure adjusting device can directly operate the pump at low power to drive the milk suction cavity to generate negative pressure suction force, and an air path transmission path is remarkably simplified. By means of the design, the overall structure is more compact, dependence on a high-power pump is reduced, and miniaturization and light weight of products are facilitated. The modular detachable design of the milk sucking part, the container and the main machine further reduces redundant parts, reduces the assembly complexity and the production cost, facilitates the maintenance of the main machine in the later period, and facilitates the disassembly and cleaning of the container and the milk sucking part.

Description

Technical Field

[0001] This utility model relates to the technical field of breast pumps, and specifically to a breast pump mechanism. Background Technology

[0002] Breast pumps, as an important auxiliary tool during modern pregnancy and breastfeeding, are widely used in breastfeeding scenarios. Their main function is to help mothers efficiently and comfortably express milk from their mammary glands by simulating the negative pressure stimulation of an infant's sucking, and store it in a matching container (such as a bottle, milk storage bag, or milk bowl). Existing breast pumps include a three-way valve, an air pump, and a deformable air bladder. The first end of the three-way valve connects to the air bladder, the second end serves as the milk expression channel, and the third end serves as the milk output channel. One end of the milk output channel connects to the milk bowl. To prevent milk from the milk bowl from flowing back into the milk output channel, a one-way valve is installed on the third end of the three-way valve. This increases the number of components in the breast pump, making the air circuit structure relatively complex.

[0003] Therefore, further improvements are needed. Utility Model Content

[0004] This invention proposes a breast pump mechanism that directly connects the suction chamber of the pumping component to an air pressure regulating device, eliminating the complex structure of traditional breast pumps that relies on deformable airbag components (such as suction bowls) to generate air pressure changes. Since there is no need to indirectly regulate the pressure of the suction chamber through airbag deformation, the air pressure regulating device can directly drive the suction chamber to generate negative pressure suction with a low-power pump, significantly simplifying the air transmission path. This design makes the overall structure more compact, reduces reliance on high-power pumps, and facilitates product miniaturization and weight reduction. The modular and detachable design of the pumping component, container, and main unit further reduces redundant parts, lowers assembly complexity and production costs, and facilitates later maintenance of the main unit, as well as disassembly and cleaning of the container and pumping component.

[0005] A breast pump designed for this purpose includes a main unit equipped with an air pressure regulating device and a container, and a breast pumping component with three ends connected to each other.

[0006] The first end of the milk suction device is directly connected to the air pressure regulating device. The air pressure regulating device adjusts the internal air pressure of the milk suction device so that the milk suction device can perform milk suction or milk expression. The second end of the milk suction device is connected to the human breast, and the third end of the milk suction device is connected to the container.

[0007] The milk suction device is provided with a hollow milk suction chamber, and the air pressure regulating device includes a running pump connected to the milk suction device to regulate the air pressure inside the milk suction chamber, and a switching valve connected to the output end and / or input end of the running pump through a pipe.

[0008] The air pressure regulating device is set to single pump mode or dual pump mode to regulate the air pressure inside the milk suction chamber through one or two operating pumps.

[0009] The container is provided with a first air pressure communication terminal group, the main unit is provided with a second air pressure communication terminal group corresponding to the air pressure regulating device's gas output and gas input, and the milk suction component is provided with a third connection terminal group corresponding to the air pressure regulating device.

[0010] The milk suction device is installed on the container, and the first air pressure communication end group and the third connection end group are arranged in a corresponding manner;

[0011] The container is installed on the host, and the first air pressure communication terminal group is inserted into the second air pressure communication terminal group.

[0012] A sealing element is provided between the first pressure communication terminal group and the second pressure communication terminal group to form a sealed fit between the two pressure communication terminal groups.

[0013] The milk suction device is detachably installed on the container, the container is provided with a limiting installation cavity, the milk suction device is provided with a connecting part, and the connecting part is provided with a milk suction cavity.

[0014] The limiting installation cavity is provided with a first limiting step;

[0015] The outer side of the connecting part of the milk suction device is provided with a switch component for switching the on / off state between the milk suction chamber and the container. The switch component is provided with a first limiting surface. The connecting part of the milk suction device is installed in the limiting installation cavity of the container, and the first limiting surface abuts against the first limiting step.

[0016] The switch component seals the milk output end of the milk suction chamber when the milk suction device is in the milk suction action, and the milk suction chamber is not connected to the container;

[0017] The switch component includes an elastic element sleeved on the outside of the connecting part, and the elastic element has a through hole communicating with the third connecting end group; the connecting part of the milk pumping component forms a flexible installation fit with the limiting installation cavity of the container through the elastic element;

[0018] The limiting installation cavity is provided with a limiting block extending upward along the end of the second limiting inclined surface. The milk suction component is assembled with the container, and the connecting part is limited on the inner side of the limiting block.

[0019] The container is detachably installed on the main unit, which is provided with a second limiting step and a second guide slope connected to one end of the second limiting step;

[0020] The container is provided with a third limiting surface and a fourth limiting inclined surface. The container is assembled with the main unit. The third limiting surface abuts against the second limiting step, and the fourth limiting inclined surface abuts against the second guide inclined surface.

[0021] The milk suction device is provided with a milk suction chamber. The first air pressure communication end group, the second air pressure communication end group and the third connection end group all include an air outlet end and an air inlet end that communicate with the milk suction chamber.

[0022] The air pressure regulating device is equipped with a gas output end connected to the air outlet end and a gas input end connected to the air inlet end, so as to realize the air pressure regulating device for gas input and gas output of the milk suction chamber.

[0023] When the milk suction device is in the milk suction usage state, the air outlet of the third connection end group is located in the top area of ​​the milk suction chamber. The lowest point of the air outlet is higher than the preset maximum working liquid level of the milk in the milk suction chamber, so as to prevent the milk from overflowing from the air outlet under the negative pressure of the milk suction chamber.

[0024] The air outlet and air inlet of the milk suction chamber are respectively provided with air passage switching structures between them and the operating pump. By switching the air passage switching structures, the operating pump can output gas and / or input gas to the milk suction chamber.

[0025] When the air pressure regulating device is set to single pump mode and only one first operating pump is set;

[0026] A first air passage opening and closing structure is provided between the first operating pump and the air outlet, and a first air vent is provided for the external air of the milk suction chamber corresponding to the first air passage opening and closing structure.

[0027] A second air passage opening and closing structure is provided between the first operating pump and the air inlet end, and the second air passage opening and closing structure is provided with a second air vent corresponding to the external air of the milk suction chamber.

[0028] The first operating pump outputs gas to the milk suction chamber. The first vent is closed and the second vent is opened. The gas in the milk suction chamber passes through the first operating pump and is finally discharged from the second vent into the air outside the milk suction chamber.

[0029] The first operating pump inputs gas into the milk suction chamber, the first vent is opened, the second vent is closed, and the air outside the milk suction chamber flows along the first vent and through the first operating pump to the air inlet.

[0030] Alternatively, the air pressure regulating device can be set to dual-pump mode and equipped with a second operating pump and a third operating pump;

[0031] The air outlet of the milk suction chamber is connected to the air inlet and the corresponding operating pump. One operating pump outputs gas to the milk suction chamber alone, and the other operating pump inputs gas to the milk suction chamber alone.

[0032] The beneficial technical effects of this utility model are as follows:

[0033] The milk suction chamber of the pump is directly connected to the air pressure regulating device, eliminating the complex structure of traditional breast pumps that rely on deformable air bladders (such as suction bowls) to generate air pressure changes. Since there's no need to indirectly regulate the pressure in the suction chamber through air bladder deformation, the air pressure regulating device can directly drive the suction chamber with a low-power pump to generate negative pressure suction, significantly simplifying the air transmission path. This design results in a more compact overall structure, reducing reliance on high-power pumps and facilitating product miniaturization and weight reduction. The modular and detachable design of the pump, container, and main unit further reduces redundant components, lowers assembly complexity and production costs, and facilitates future maintenance of the main unit, as well as disassembly and cleaning of the container and pump. Attached Figure Description

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0035] Figure 1 This is a three-dimensional structural diagram of the breast pump according to the first embodiment of this utility model.

[0036] Figure 2 This is a schematic diagram of the air pressure regulating device of the breast pump according to the first embodiment of this utility model.

[0037] Figure 3 This is a three-dimensional structural diagram of the air pressure regulating device of the first embodiment of the present invention, which implements gas output to the milk suction chamber.

[0038] Figure 4 This is a three-dimensional structural diagram of the air pressure regulating device of the first embodiment of the present invention, which implements gas input to the milk suction chamber.

[0039] Figure 5 This is a three-dimensional structural diagram of the milk suction component according to the first embodiment of this utility model.

[0040] Figure 6 This is a three-dimensional structural diagram of the air pressure regulating device of the second embodiment of the present invention, which implements gas output to the milk suction chamber.

[0041] Figure 7 This is a three-dimensional structural diagram of the air pressure regulating device of the second embodiment of the present invention, which implements gas input to the milk suction chamber.

[0042] Figure 8 This is a schematic diagram of the cross-sectional structure of the air inlet and outlet ends of the breast pump in the first and second embodiments of this utility model.

[0043] Figure 9 This is a schematic diagram showing the assembly and disassembly structure of the breast pump in the first and second embodiments of this utility model.

[0044] Figure 10 This is an exploded view of the breast pump assembly in another position in the first and second embodiments of this utility model.

[0045] Figure 11 This is a three-dimensional cross-sectional view of the assembled breast pump in the first and second embodiments of this utility model.

[0046] Figure 12 This is a schematic diagram of the assembly cross-sectional structure of the breast pump in the first and second embodiments of this utility model. Detailed Implementation

[0047] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0048] First embodiment:

[0049] See Figures 1-5 ,as well as Figure 8 Figure 12 A breast pump mechanism includes a main unit 25 equipped with an air pressure regulating device 2 and a container 23, and a breast pumping component 1 with three ends connected to each other.

[0050] The first end of the milk suction device 1 is directly connected to the air pressure regulating device 2. The air pressure regulating device 2 operates to regulate the internal air pressure of the milk suction device 1 so that the milk suction device 1 can perform milk suction or milk expression. The second end of the milk suction device 1 is connected to the human breast, and the third end of the milk suction device 1 is connected to the container 23.

[0051] The breast pump's suction mechanism is directly connected to the air pressure regulating device 2 via the suction chamber 3 of the suction component 1, eliminating the complex structure of traditional breast pumps that relies on deformable airbag components (such as suction bowls) to generate air pressure changes. Since there is no need to indirectly regulate the pressure of the suction chamber 3 through airbag deformation, the air pressure regulating device 2 can directly drive the suction chamber 3 to generate negative pressure suction with the low-power pump 4, significantly simplifying the air transmission path. This design makes the overall structure more compact, reduces reliance on high-power pumps, and facilitates product miniaturization and weight reduction. The modular and detachable design of the suction component 1, container 23, and main unit 25 further reduces redundant parts, lowers assembly complexity and production costs, and facilitates later maintenance of the main unit 25, as well as disassembly and cleaning of the container 23 and suction component 1.

[0052] The air pressure regulating device 2 discharges the gas from the milk suction chamber 3 of the milk suction component 1, and the milk suction chamber 3 forms a negative pressure state to realize the milk suction action of the milk suction component 1.

[0053] The air pressure regulating device 2 introduces outside air into the milk suction chamber 3 to blow out the milk inside the milk suction chamber 3.

[0054] The milk suction device 1 is provided with a hollow milk suction chamber 3, and the air pressure regulating device 2 includes a running pump 4 connected to the milk suction device 1 to regulate the air pressure inside the milk suction chamber 3, and a switching valve connected to the output end and / or input end of the running pump 4 through a pipe.

[0055] The air pressure regulating device 2 is set to single pump mode or dual pump mode to regulate the air pressure inside the milk suction chamber 3 through one or two operating pumps 4.

[0056] The single-pump or dual-pump design of the air pressure regulating device 2 is adapted to the application scenarios of the low-power operating pump 4. In single-pump mode, positive and negative pressure switching is achieved through the air path switching of a single operating pump 4, eliminating the complex layout of the traditional dual-pump structure. In dual-pump mode, two independent low-power operating pumps 4 control the milk suction and milk expression actions respectively. Both modes are based on a bladder-free design, reducing the pump's operating power requirements and reducing the internal volume of the main unit 25, making the internal space layout of the main unit 25 more compact, especially suitable for the lightweight requirements of portable breast pumps.

[0057] The hollow milk-suction chamber 3 of the milk-suction component 1 integrates the functions of a traditional three-way connector through a three-in-one structure, directly connecting the breast inlet, container inlet, and air pressure regulating device 2. This design eliminates the need for a separate airbag and its associated connecting tubing. The straight-through air path of the milk-suction chamber 3 shortens the pressure transmission distance, enabling the low-power pump 4 to quickly establish effective negative pressure, further reducing the overall structural size and improving milk-suction efficiency and product portability.

[0058] The container 23 is provided with a first air pressure communication terminal group 26, the main unit 25 is provided with a second air pressure communication terminal group 27 corresponding to the air pressure regulating device 2 for gas output and gas input, and the milk suction component 1 is provided with a third connection terminal group 24 corresponding to the air pressure regulating device 2.

[0059] The milk suction device 1 is installed on the container 23, and the first air pressure communication end group 26 and the third connection end group 24 are arranged in a corresponding manner.

[0060] The container 23 is installed on the host 25, and the first air pressure communication terminal group 26 is inserted into the second air pressure communication terminal group 27.

[0061] A sealing element 28 is provided between the first pressure communication terminal group 26 and the second pressure communication terminal group 27 to form a sealed fit between the two pressure communication terminal groups.

[0062] The container 23 and the main unit 25 are connected by a plug-in sealed connection of the first air pressure communication terminal group 26 and the second air pressure communication terminal group 27, eliminating the need for a separate air path interface required by traditional airbag assemblies. The seal 28 ensures that the air pressure generated by the low-power operation pump 4 is efficiently transmitted to the milk suction chamber 3, avoiding the pressure leakage problem commonly seen in airbag deformation structures. The modular quick-release design simplifies the assembly process, making the combination of the milk suction component 1, container 23, and main unit 25 more compact, reducing volume redundancy caused by the connection of multiple components, and reducing the number of sealing links to control costs.

[0063] In this embodiment, the main unit 25 has a groove corresponding to the second air pressure communication end group 27. The sealing member 28 is installed on the groove and sleeved on the outside of the second air pressure communication end group 27. The sealing member 28 is elastic. The container 23 is installed on the main unit 25. The first air pressure communication end group 26 is actually inserted into the venting part of the sealing member 28. When the container 23 is separated from the main unit 25, the first air pressure communication end group 26 is laterally disengaged from the venting part of the sealing member 28. Since the sealing member 28 is elastic, it satisfies the need for repeated disassembly and assembly between the main unit 25 and the container 23. Alternatively, the sealing member 28 is sleeved on the outside of the first air pressure communication end group 26. The sealing member 28 is detachably installed on the main unit 25 along with the container 23. The sealing member 28 is detachably installed on the outside of the first air pressure communication end group 26 or the second air pressure communication end group 27.

[0064] The milk suction component 1 is detachably installed on the container 23. The container 23 is provided with a limiting installation cavity 29. The milk suction component 1 is provided with a connecting part 30, and a milk suction cavity 3 is provided in the connecting part 30.

[0065] The limiting installation cavity 29 is provided with a first limiting step 31;

[0066] The outer side of the connecting part 30 of the milk suction component 1 is provided with a switch component 22 for switching the on / off state between the milk suction chamber 3 and the container 23. The switch component 22 is provided with a first limiting surface 33. The connecting part 30 of the milk suction component 1 is installed in the limiting installation cavity 29 of the container 23, and the first limiting surface 33 abuts against the first limiting step 31.

[0067] The switch component 22 seals the milk output end of the milk suction chamber 3 when the milk suction component 1 is suctioning, and the milk suction chamber 3 is not connected to the container 23;

[0068] The switch component 22 includes an elastic element 35 sleeved on the outside of the connecting part 30. The elastic element 35 is provided with a through hole 35.1 communicating with the third connecting end group 24. The connecting part 30 of the milk pumping component 1 forms a flexible installation fit with the limiting installation cavity 29 of the container 23 through the elastic element 35.

[0069] The limiting installation cavity 29 is provided with a limiting block 36 extending upward along the end of the second limiting inclined surface 34. The milk suction component 1 is assembled with the container 23, and the connecting part 30 is limited on the inner side of the limiting block 36.

[0070] In this embodiment, a magnetic mating component is provided on the second limiting inclined surface 34 of the elastic element 35. The magnetic mating component is integrally formed with the elastic element 35 by injection molding, and the elastic element 35 encapsulates the magnetic mating component. The main unit 25 is provided with a magnetic drive component such as a coil to generate a magnetic field. When the main unit 25 is connected to the power supply, the magnetic drive component generates a magnetic field after being energized, which attracts the magnetic mating component. The switch component 22 is opened, and the milk suction chamber 3 is connected to the container 23. When the magnetic drive component is de-energized, the magnetic field disappears, the elastic element 35 deforms and resets, the switch component 22 is closed, and the milk suction chamber 3 is not connected to the container 23. Because the elastic element 35 is elastic, it also satisfies the repeated disassembly and assembly between the milk suction component 1 and the container 23. Moreover, the milk suction component 1 is installed on the container 23, and the first air pressure communication end group 26 and the third connection end group 24 are correspondingly arranged. The first air pressure communication end group 26 and the third connection end group 24 are not directly connected, which improves the durability of the product.

[0071] The stepped mating structure of the limiting mounting cavity 29 and the connecting part 30 replaces the mechanical linkage device of the traditional airbag component, achieving precise positioning of the milk suction component 1 through the first limiting step 31 and the first guide slope 32. The switching component 22 automatically closes the container 23 channel during milk suction. Moreover, the efficient use of the structure on the switching component 22 eliminates the need for additional positioning and mounting parts, further reducing product costs and simplifying the internal installation structure of the product.

[0072] The container 23 is detachably installed on the host 25. The host 25 is provided with a second limiting step 37 and a second guide slope 38 connected to one end of the second limiting step 37.

[0073] The container 23 is provided with a third limiting surface 39 and a fourth limiting inclined surface 40. The container 23 is assembled with the main unit 25. The third limiting surface 39 abuts against the second limiting step 37, and the fourth limiting inclined surface 40 abuts against the second guide inclined surface 38.

[0074] The second limiting step 37 of the main unit 25 and the third limiting surface 39 of the container 23 form a positioning assembly structure to ensure precise docking of the connection end group and the communication end group between the low-power operation pump 4, the container and the milk suction chamber 3. The second guide slope 38 guides the container 23 to be installed quickly.

[0075] The milk suction device 1 is provided with a milk suction chamber 3. The first air pressure communication end group 26, the second air pressure communication end group 27 and the third connection end group 24 all include an air outlet 5 and an air inlet 6 that communicate with the milk suction chamber 3.

[0076] The air pressure regulating device 2 is provided with a gas output end 7 connected to the air outlet end 5 and a gas input end 8 connected to the air inlet end 6, so as to realize the gas input and gas output of the milk suction chamber 3 by the air pressure regulating device 2.

[0077] The dual-channel independent design of the air outlet 5 and air inlet 6 physically isolates the positive and negative pressure air paths, eliminating the need for the complex valve structure in the airbag system to prevent airflow cross-contamination. The direct connection between the gas output end 7 and the gas input end 8 eliminates the delay in pressure transmission in traditional airbags, enabling the low-power operating pump 4 to quickly respond to pressure regulation needs.

[0078] When the milk suction device 1 is in the milk suction usage state, the air outlet 5 of the third connection end group 24 is located in the top area of ​​the milk suction chamber 3. The lowest point of the air outlet 5 is higher than the preset highest working liquid level of the milk in the milk suction chamber 3, so as to prevent the milk from overflowing from the air outlet 5 under the negative pressure of the milk suction chamber 3.

[0079] The air outlet 5 and air inlet 6 of the milk suction chamber 3 are respectively provided with air passage switching structures between them and the operating pump 4. By switching the air passage switching structures, the operating pump 4 can perform gas output and / or gas input to the milk suction chamber 3.

[0080] When the air pressure regulating device 2 is set to single pump mode and only one first operating pump 12 is set;

[0081] A first air passage opening and closing structure is provided between the first operating pump 12 and the air outlet 5, and a first air vent 11 is provided for the external air of the milk suction chamber corresponding to the first air passage opening and closing structure.

[0082] A second air passage switching structure is provided between the first operating pump 12 and the air inlet 6, and a second air vent 15 is provided for the external air of the milk suction chamber corresponding to the second air passage switching structure.

[0083] The first operating pump 12 outputs gas to the milk suction chamber 3. The first vent 11 is closed and the second vent 15 is opened. The gas in the milk suction chamber 3 passes through the first operating pump 12 and is finally discharged from the second vent 15 into the air outside the milk suction chamber.

[0084] The first operating pump 12 inputs gas into the milk suction chamber 3, the first vent 11 is opened, the second vent 15 is closed, and the air outside the milk suction chamber flows along the first vent 11, through the first operating pump 12, to the air inlet 6.

[0085] When the milk suction device 1 is in the milk suction usage state, the air outlet 5 of the third connection end group 24 is located in the top area of ​​the milk suction chamber 3. The lowest point of the air outlet 5 is higher than the preset highest working liquid level of the milk in the milk suction chamber 3, so as to prevent the milk from overflowing from the air outlet 5 under the negative pressure of the milk suction chamber 3.

[0086] The air outlet 5 is positioned at the top of the milk suction chamber 3 when the milk suction unit 1 is in use, with its lowest point higher than the preset maximum working liquid level. This design effectively prevents milk from overflowing from the air outlet 5 under negative pressure. This structure, through physical liquid level isolation, eliminates the need for an additional anti-backflow valve, simplifying the internal structure of the milk suction unit 1 while ensuring strict separation of the air and liquid paths. This design significantly reduces the risk of milk contaminating the air path, extends the service life of the air pressure regulating device 2, and reduces the complexity of cleaning and maintenance.

[0087] The airflow switching structure allows the single-operation pump 4 to switch between gas output and gas input functions. Changing the airflow direction via valves significantly reduces hardware complexity. The rapid response of the airflow switching structure shortens mode switching time and increases the upper limit of milk expression frequency. This structure also allows for customizable positive and negative pressure ratios, such as extending the negative pressure duration to simulate an infant's sucking rhythm. The mechanical or electromagnetic drive method of the switching structure can be flexibly selected according to cost requirements, balancing performance and price.

[0088] In single-pump mode, the first operating pump 12, in conjunction with the first and second air path on / off structures, achieves bidirectional air pressure regulation. During gas output, the first vent 11 is closed and the second vent 15 is open, creating a unidirectional airflow from the milk suction chamber 3 to the first operating pump 12 and then to the outside. During gas input, the first vent 11 is open and the second vent 15 is closed, reversing the airflow from the outside to the first operating pump 12 and then to the milk suction chamber 3. This design uses only a single pump body to achieve bidirectional operation, significantly reducing power consumption and size, making it suitable for miniaturized breast pumps. The logic control of the air path on / off structure is simple and reliable, with a low failure rate, and the optimized vent positions prevent cross-contamination of airflow.

[0089] The first gas path switching structure includes a first gas path 9 and a first switching valve 10;

[0090] The first end of the first gas passage 9 forms a gas output end 7 connected to the gas outlet end 5;

[0091] The second end of the first air passage 9 is connected to the suction end of the first operating pump 4;

[0092] The third end of the first air passage 9 is provided with a first air vent 11 corresponding to the external air of the milk suction chamber. The first switch valve 10 is provided corresponding to the first air vent 11. The first switch valve 10 is connected to the first air vent 11 of the first air passage 9 so as to open and close the first air vent 11 through the first switch valve 10.

[0093] The second air passage switching structure includes a second air passage 13 and a second switching valve 14;

[0094] The first end of the second air passage 13 forms a gas input end 8 connected to the air inlet end 6;

[0095] The second end of the second air passage 13 is connected to the exhaust end of the first operating pump 4;

[0096] The third end of the second air passage 13 is provided with a second air vent 15 corresponding to the external air of the milk suction chamber. The first switch valve 10 is provided in correspondence with the first air vent 11. The second switch valve 14 is connected to the second air vent 15 of the second air passage 13 so as to open and close the second air vent 15 through the second switch valve 14.

[0097] The first air passage on / off structure precisely controls the negative pressure air passage through the first air passage 9 and the first switching valve 10. The three-terminal design of the first air passage 9 (connecting to the outlet end 5, the suction end of the first operating pump 4, and the first vent 11) enables multi-directional airflow distribution. The first switching valve 10 is linked with the first vent 11 to ensure complete isolation of external air from the milk suction chamber during the negative pressure stage, preventing pressure leakage. The electromagnetic or mechanical first switching valve 10 can respond in milliseconds, ensuring the continuity of the milk suction rhythm. The first air passage 9 is made of food-grade silicone, which is highly flexible and resistant to high-temperature sterilization.

[0098] The second air passage 13 of the second air passage switching structure works in conjunction with the second switching valve 14 to manage the gas input air passage. The three ends of the second air passage 13 are respectively connected to the air inlet 6, the exhaust end of the first operating pump 4, and the second air vent 15, forming a reversible airflow channel. When the second switching valve 14 closes the second air vent 15, the forced airflow enters the milk suction chamber 3.

[0099] Second embodiment:

[0100] See Figures 6-7 A breast pump mechanism, which differs from the first embodiment, is configured as a dual-pump mode and is equipped with a second operating pump 16 and a third operating pump 17.

[0101] The air outlet 5 of the milk suction chamber 3 is connected to the air inlet 6 and the corresponding operating pump 17. One operating pump outputs gas to the milk suction chamber 3 alone, and the other operating pump inputs gas to the milk suction chamber 3 alone.

[0102] The second operating pump 16 is connected to the air inlet and the air outlet 5. The second operating pump 16 is connected to the air outside the milk suction chamber. A third air passage switching structure is provided between the second operating pump 16 and the air outlet 5 to switch the on / off connection between the second operating pump 16 and the air inlet 5.

[0103] The exhaust end of the third operating pump 17 is connected to the air inlet end 6, and the suction end of the third operating pump 17 is connected to the external air of the milk suction chamber; a fourth air passage switching structure is provided between the exhaust end of the third operating pump 17 and the air inlet end 6 to switch the on / off between the exhaust end of the third operating pump 17 and the air inlet end 6.

[0104] The third gas passage switching structure includes a third gas passage 18 and a third switching valve 19;

[0105] The first end of the third gas passage 18 forms a gas output end 7 connected to the gas outlet end 5;

[0106] The second end of the third air passage 18 is connected to the suction end of the second operating pump 16;

[0107] The third section of the third air passage 18 is connected to the third switching valve 19;

[0108] In this embodiment, the third switch valve 19 is opened, the second operating pump 16 is operated, the gas in the milk suction chamber 3 passes through the third air passage 18 and the second operating pump 16, and the gas is discharged into the outside air of the milk suction chamber along the exhaust end of the second operating pump 16.

[0109] The fourth gas passage switching structure includes a fourth gas passage 20 and a fourth switching valve 21;

[0110] The first end of the fourth gas passage 20 forms a gas input end 8 connected to the air inlet end 6;

[0111] The second end of the fourth air passage 20 is connected to the exhaust end of the third operating pump 17;

[0112] The third section of the fourth gas passage 20 is connected to the fourth switching valve 21.

[0113] In this embodiment, the fourth switch valve 21 is opened, the third operating pump 17 is running, and the air outside the milk suction chamber enters the milk suction chamber 3 through the fourth air passage 20 along the air inlet 6 via the exhaust end of the second operating pump 16.

[0114] In the dual-pump mode, the second operating pump 16 and the third operating pump 17 operate independently. The second operating pump 16 is dedicated to gas output, and the third operating pump 17 is dedicated to gas input. The two operate in parallel, shortening the cycle time and improving efficiency. The independent gas path also avoids interference between positive and negative pressures.

[0115] Third embodiment:

[0116] A breast pump mechanism differs from the first embodiment in that the air pressure regulating device 2 is a single-pump structure that only outputs gas and does not input gas into the milk suction chamber 3. Liquid in the milk suction chamber 3 is poured into the container 23 via backflow when the switch component 22 is open.

[0117] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A breast pumping mechanism, characterized in that: It includes a main unit (25) equipped with an air pressure regulating device (2) and a container (23), and a milk suction device (1) with three ends connected to each other. The first end of the milk suction device (1) is directly connected to the air pressure regulating device (2). The air pressure regulating device (2) operates to regulate the internal air pressure of the milk suction device (1) so that the milk suction device (1) can perform milk suction or milk discharge. The second end of the milk suction device (1) is connected to the human breast, and the third end of the milk suction device (1) is connected to the container (23).

2. The milk-expressing mechanism of the breast pump according to claim 1, characterized in that: The milk suction device (1) is provided with a hollow milk suction chamber (3), and the air pressure regulating device (2) includes a running pump (4) connected to the milk suction device (1) to regulate the air pressure inside the milk suction chamber (3), and a switch valve connected to the output end and / or input end of the running pump (4) through a pipe; The air pressure regulating device (2) is set to single pump mode or dual pump mode to regulate the air pressure inside the milk suction chamber (3) by one or two operating pumps (4).

3. The milk-expressing mechanism of the breast pump according to claim 1, characterized in that: The container (23) is provided with a first air pressure communication terminal group (26), the main unit (25) is provided with a second air pressure communication terminal group (27) for the gas output and gas input of the air pressure regulating device (2), and the milk suction device (1) is provided with a third connection terminal group (24) for the air pressure regulating device (2). The milk suction device (1) is installed on the container (23), and the first air pressure communication end group (26) and the third connection end group (24) are arranged in a corresponding manner; The container (23) is installed on the host (25), and the first air pressure communication terminal group (26) is inserted into the second air pressure communication terminal group (27).

4. The milk-expressing mechanism of the breast pump according to claim 3, characterized in that: A sealing element (28) is provided between the first pressure communication terminal group (26) and the second pressure communication terminal group (27) to form a sealed fit between the two pressure communication terminal groups.

5. The milk-expressing mechanism of the breast pump according to claim 3, characterized in that: The milk suction component (1) is detachably installed on the container (23). The container (23) is provided with a limiting installation cavity (29). The milk suction component (1) is provided with a connecting part (30). The connecting part (30) is provided with a milk suction cavity (3). The limiting installation cavity (29) is provided with a first limiting step (31); The outer side of the connecting part (30) of the milk suction component (1) is provided with a switch component (22) for switching the on / off state between the milk suction chamber (3) and the container (23). The switch component (22) is provided with a first limiting surface (33). The connecting part (30) of the milk suction component (1) is installed in the limiting installation cavity (29) of the container (23), and the first limiting surface (33) abuts against the first limiting step (31).

6. The milk-expressing mechanism of the breast pump according to claim 5, characterized in that: The switch component (22) seals the milk output end of the milk suction chamber (3) under the milk suction action of the milk suction component (1), and the milk suction chamber (3) is not connected to the container (23); The switch component (22) includes an elastic element (35) sleeved on the outside of the connecting part (30), and the elastic element (35) is provided with a through hole (35.1) communicating with the third connecting end group (24); the connecting part (30) of the milk pumping component (1) forms a flexible installation fit with the limiting installation cavity (29) of the container (23) through the elastic element (35); The limiting installation cavity (29) is provided with a limiting block (36) extending upward along the end of the second limiting inclined surface (34). The milk suction component (1) is assembled with the container (23), and the connecting part (30) is limited on the inner side of the limiting block (36).

7. The milk-expressing mechanism of the breast pump according to claim 1, characterized in that: The container (23) is detachably installed on the host (25). The host (25) is provided with a second limiting step (37) and a second guide slope (38) connected to one end of the second limiting step (37). The container (23) is provided with a third limiting surface (39) and a fourth limiting inclined surface (40). The container (23) is assembled with the host (25). The third limiting surface (39) abuts against the second limiting step (37), and the fourth limiting inclined surface (40) abuts against the second guide inclined surface (38).

8. The milk-expressing mechanism of the breast pump according to claim 3, characterized in that: The milk suction device (1) is provided with a milk suction chamber (3). The first air pressure communication end group (26), the second air pressure communication end group (27) and the third connection end group (24) all include an air outlet (5) and an air inlet (6) that communicate with the milk suction chamber (3). The air pressure regulating device (2) is provided with a gas output end (7) connected to the air outlet end (5) and a gas input end (8) connected to the air inlet end (6) to realize the gas input and gas output of the milk suction chamber (3) by the air pressure regulating device (2).

9. The milk-expressing mechanism of the breast pump according to claim 8, characterized in that: When the milk suction device (1) is in the milk suction use state, the air outlet (5) of the third connection end group (24) is located in the top area of ​​the milk suction chamber (3). The lowest point of the air outlet (5) is higher than the preset highest working liquid level of the milk in the milk suction chamber (3) to prevent the milk from overflowing from the air outlet (5) under negative pressure.

10. The milk-expressing mechanism of the breast pump according to claim 8, characterized in that: The air outlet (5) and air inlet (6) of the milk suction chamber (3) are respectively provided with an air passage switching structure between them and the running pump (4). By switching the air passage switching structure, the running pump (4) can output gas and / or input gas to the milk suction chamber (3). When the air pressure regulating device (2) is set to single pump mode and only one first operating pump (12) is set; A first air passage opening and closing structure is provided between the first operating pump (12) and the air outlet (5), and a first air vent (11) is provided for the external air of the milk suction chamber corresponding to the first air passage opening and closing structure. A second air passage opening and closing structure is provided between the first operating pump (12) and the air inlet (6), and the second air passage opening and closing structure is provided with a second air inlet (15) corresponding to the external air of the milk suction chamber. The first operating pump (12) outputs gas to the milk suction chamber (3), the first vent (11) is closed, the second vent (15) is opened, the gas in the milk suction chamber (3) passes through the first operating pump (12), and the gas is finally discharged from the second vent (15) into the air outside the milk suction chamber; The first operating pump (12) inputs gas into the milk suction chamber (3), the first vent (11) is opened, the second vent (15) is closed, and the air outside the milk suction chamber flows along the first vent (11), through the first operating pump (12) to the air inlet (6). Alternatively, the air pressure regulating device (2) is set to dual pump mode and is equipped with a second operating pump (16) and a third operating pump (17). The air outlet (5) of the milk suction chamber (3) is connected to the air inlet (6) and the corresponding operating pump (17), one of which provides gas output to the milk suction chamber (3) alone, and the other provides gas input to the milk suction chamber (3) alone.

Images