Two-way breast pump

Abstract

The utility model discloses a two-way breast pump, which relates to the technical field of breast pumps, and comprises a host machine, a main board, a water pump and a water pump, the two negative pressure sources comprise negative pressure pumps and control valves, and the negative pressure pumps and the control valves are electrically connected with the main board; the two breast pump three-way pieces are respectively connected with the negative pressure pumps through pipelines; the negative pressure sources control the breast pump three-way pieces on the two sides to conduct breast pumping work, the corresponding negative pressure sources accurately control the suction force and the speed of the negative pressure pumps through the control valves, the suction force and the speed of the corresponding breast pump three-way pieces in the breast pumping process are independently controlled, the working requirements of the left breast and the right breast when the conditions are different are met, and the breast pumping effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of breast pumps, in particular to a double-pass breast pump. Background Art

[0002] A breast pump is a tool used to express breast milk accumulated in the mammary glands. Because single-pass breast pumps can only collect milk from one breast at a time, making them inefficient, two-pass breast pumps are becoming increasingly popular. However, traditional two-pass breast pumps have been found to have varying breast conditions. If both breast pumps utilize a unified suction control, there's a risk of insufficient suction from one breast, resulting in no milk being extracted, or excessive suction, causing pain in the breast or nipple. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems in the prior art. To this end, the utility model proposes a double-pass breast pump.

[0004] According to the first embodiment of the present invention, a dual-channel breast pump includes: a main unit with a built-in main board; two negative pressure sources, each of which includes a negative pressure pump and a control valve, and each of which is electrically connected to the main board; and two breast pump tees, each of which is connected to each of the negative pressure pumps via a pipe.

[0005] According to some embodiments of the present invention, the negative pressure pump is a piston pump or a diaphragm pump.

[0006] According to some embodiments of the present invention, the control valve is a solenoid valve.

[0007] According to some embodiments of the present invention, an electric pulse generator and two electrode sheets are also included. The electric pulse generator is located in the host, connected to the main board or electrically connected to the main board, and has two pulse units, each of which is electrically connected to each of the electrode sheets.

[0008] According to some embodiments of the present invention, a series battery pack is further provided in the host, the series battery pack is connected to a charging port, the charging port is located on the host, and the series battery pack is electrically connected to the mainboard.

[0009] According to some embodiments of the present utility model, the tee of the breast pump includes a tee main body and an airbag assembly. An airbag opening is provided on the upper side of the tee main body, the airbag assembly is located in the airbag opening, an airflow channel is provided on the airbag assembly, and the airflow channel is connected to the negative pressure pump through a pipeline. A milk suction port is provided on the front side of the tee main body, a bra ring is provided on the milk suction port, and a milk discharge port is provided on the lower side of the tee main body, and the milk discharge port can be connected to a feeding bottle.

[0010] According to some embodiments of the present invention, the shortest horizontal distance between the frontmost position of the bra band and the frontmost position of the feeding bottle is a, and the value of a is a≤4 cm.

[0011] According to some embodiments of the present invention, a vertical drainage surface is provided on the lower side of the milk suction port.

[0012] According to some embodiments of the present invention, an inclined drainage surface is provided on the inner wall of the rear side of the tee body, and the inclined drainage surface is a U-shaped surface. The inclined drainage surface includes side drainage surfaces on the left and right sides, and the side drainage surfaces have an inclined angle. The milk on the inclined drainage surface flows downward along the inclined angle.

[0013] According to some embodiments of the present invention, a guide surface is provided between the lower side of the inclined drainage surface and the milk discharge port, the guide surface surrounds the milk discharge port, and a turning angle is formed between the upper side of the guide surface and the vertical drainage surface, and the milk on the inclined drainage surface flows along the guide surface to the milk discharge port.

[0014] The dual-channel breast pump according to the embodiment of the present invention has at least the following technical effects: each negative pressure source controls the three-way breast pump components on both sides to perform milk suction work, wherein the corresponding negative pressure sources respectively control the suction force and speed of the negative pressure pump through the control valve, thereby achieving independent control of the suction force and speed of the corresponding three-way breast pump components during the milk suction process, matching the working needs when the left and right breasts are different, and achieving a better milk suction effect.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 It is a three-dimensional diagram of the double-pass breast pump of the utility model;

[0018] Figure 2 This is a schematic diagram of the circuit principle of the double-pass breast pump of the utility model;

[0019] Figure 3 This is a three-dimensional cross-sectional view of the double-pass breast pump of the utility model;

[0020] Figure 4 It is a three-dimensional diagram of the three-way component of the breast pump in the present utility model;

[0021] Figure 5 This is a schematic structural diagram of the three-way component of the breast pump in the present invention;

[0022] Figure 6 This is an exploded view of the structure of the three-way component of the breast pump in the present invention;

[0023] Figure 7 It is a cross-sectional view of the three-way component of the breast pump in the present utility model.

[0024] Reference numerals:

[0025] Host 100, main board 110, display module 120, mechanical main switch 130, breast pump hanging ring 140; negative pressure source 200, negative pressure pump 210, control valve 220, negative pressure interface 230; breast pump tee 300, tee body 310, air bag opening 311, milk suction opening 312, bra ring 313, milk discharge opening 314, vertical drainage surface 315, inclined drainage surface 316, side drainage surface 317, guide surface 318, turning angle 319, air bag assembly 320, air flow channel 321, air bag cover 322, soft air bag 323, one-way duckbill valve 330, feeding bottle 340, breast pad 350; electric pulse generator 400, pulse unit 410, electrode sheet 420, electrode interface 430; series battery pack 500, charging port 510. DETAILED DESCRIPTION

[0026] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of this utility model, "a plurality" means more than two, and "greater than," "less than," "exceed," etc. are understood to exclude the number itself. The use of "first" or "second" is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of the indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference below Figure 1 and Figure 2 A dual-pass breast pump according to an embodiment of the present invention is described.

[0031] like Figure 1 and Figure 2 As shown, a dual-channel breast pump according to an embodiment of the present invention includes a main unit 100 , two negative pressure sources 200 and two breast pump tee pieces 300 .

[0032] Reference Figure 2 、 Figure 3 The host 100 has a built-in motherboard 110; the negative pressure source 200 includes a negative pressure pump 210 and a control valve 220, and the negative pressure pump 210 and the control valve 220 are electrically connected to the motherboard 110 respectively; each breast pump tee 300 is connected to each negative pressure pump 210 through a pipeline.

[0033] The mainboard 110 built into the host 100 serves as the control unit of the dual-pass breast pump of the present invention. The negative pressure source 200 includes a negative pressure pump 210 and a control valve 220. The negative pressure pump 210 generates negative pressure on the breast pump tee 300 to generate suction for sucking out milk from the corresponding breast. The control valve 220 is used to accurately control the suction force and speed of the negative pressure pump 210. Figure 4 After the breast pump tee 300 generates negative pressure, it forms a suction force at intervals to perform milk suction.

[0034] For example, Figure 2 and Figure 3As shown, the two negative pressure sources 200 are respectively the first and second negative pressure sources, and the two breast pump tees 300 are respectively the first and second breast pump tees. The first negative pressure source is connected to the first breast pump tee via a hose, independently controlling the suction force and rate of the first breast pump tee; the second negative pressure source is connected to the second breast pump tee via a hose, independently controlling the suction force and rate of the second breast pump tee. The independent control of the two breast pump tees 300 in conjunction with the corresponding negative pressure sources 200 addresses the different suction force and frequency requirements for the left and right breasts.

[0035] In some embodiments of the present invention, the negative pressure pump 210 is a piston pump or a diaphragm pump, which are small in size, compact in structure, and inexpensive, and both meet the working requirements of the breast pump.

[0036] In some embodiments of the present invention, the control valve 220 is a solenoid valve, which has a quick control response and high controllability, and is in line with the requirements for the vacuum pump 210 to control the suction force and speed of milking.

[0037] In some embodiments of the present invention, referring to Figure 2 The dual-channel breast pump of the present invention also includes an electric pulse generator 400 and two electrode sheets 420. The electric pulse generator 400 is located in the main unit 100 and is connected to the main board 110 or electrically connected to the main board 110. The electrode sheets 420 stimulate the breasts and dredge the mammary glands, thereby improving the milk secretion effect. As a physical therapy method, breast dredging electrical stimulation stimulates the breasts through electric current, promotes blood circulation in the breasts, dilates the mammary ducts, and thus achieves the purpose of dredging the mammary glands. It can be used to relieve symptoms such as breast pain and breast lumps caused by diseases such as breast hyperplasia and mastitis. The electric pulse generator 400 has two pulse units 410, each of which is electrically connected to each electrode sheet 420. In this way, each pulse unit 410 can independently control the current intensity, discharge time, etc. of its own electrode sheet 420, solving the needs of different current intensity, time, and temperature required for the left and right breasts.

[0038] In some specific embodiments of the present invention, electrode sheet 420 has both electrical stimulation and heating effects, achieving a therapeutic effect on the breasts through electrical stimulation and a warm compress effect through heating. Mammary gland blockage is common in lactating women, where milk accumulates in the milk ducts and cannot be promptly expelled. Mammary gland blockage can also occur due to mastitis. Applying heat generated by electrode sheet 420 to the breasts through a wet compress can promote blood circulation and help clear blocked mammary glands.

[0039] In some embodiments of the present invention, a series-connected battery pack 500 is also provided within the main unit 100. This battery pack 500 is connected to a charging port 510 located on the main unit 100 and electrically connected to the mainboard 110. This battery pack 500 serves as the power supply for the dual-pass breast pump of the present invention and is recharged from an external power source via the charging port 510. The series-connected battery pack 500 utilizes a more stable output, meeting the requirements for more precise control of the suction force and flow rate of the breast pump's three-way fitting. Furthermore, this design reduces energy waste.

[0040] Currently, most similar products on the market use a multi-parallel design, where multiple batteries are connected in parallel, or a multi-parallel multi-series design, where multiple batteries are first connected in parallel and then in series. This approach can easily lead to batteries charging each other when their remaining charge levels differ, wasting battery life and affecting battery life. Furthermore, parallel batteries increase current flow and instability, raising the temperature of electronic components and causing unstable operation. The series design of the present utility model overcomes these technical problems.

[0041] In some specific embodiments of the present invention, the series battery pack 500 includes two battery modules, and the battery module includes a plurality of batteries connected in series, and each battery module is connected in series.

[0042] In a further embodiment of the present invention, the breast pump tee 300 can be held by hand to align the breast with the breast, or it can be put on the body through a wearable structure to fix the breast pump tee 300 at the breast.

[0043] In some embodiments of the present invention, referring to Figure 5 、 Figure 6The breast pump tee 300 includes a tee body 310 and an airbag assembly 320. The tee body 310 has an airbag opening 311 on its upper side. The airbag assembly 320 is located within the opening 311. An airflow channel 321 is provided on the airbag assembly 320, which is connected to the negative pressure pump 210 via a pipe. A milk suction port 312 is provided on the front side of the tee body 310, and a bra collar 313 is provided above the milk suction port 312. A milk discharge port 314 is provided on the underside of the tee body 310, which can communicate with a feeding bottle 340. The tee body 310 is a fixed component, while the airbag assembly 320 is movable to create a negative pressure environment, generating suction within the breast pump tee 300. The bra collar 313 is provided above the milk suction port 312, and the milk suction port 312 is aligned with the nipple to ensure smooth milk extraction. The airbag assembly 320 is located in the airbag opening 311. An airflow channel 321 is provided on the airbag assembly 320. The airflow channel 321 is connected to the negative pressure pump 210 through a pipe. The negative pressure pump 210 contracts the airbag assembly 320 to form negative pressure, so that milk can be sucked out and flow into the feeding bottle 340 from the milk discharge port 314 on the lower side of the three-way body 310 for collection.

[0044] In some embodiments of the present invention, the shortest horizontal distance between the frontmost side of the bra ring 313 and the frontmost side of the feeding bottle 340 is a, where a is ≤ 4 cm. Once the breast pump tee 300 is aligned with the breast, the above-described design brings the center of gravity of the breast pump tee 300 as close to the breast as possible. This ensures that when the breast pump tee 300 is in close contact with the breast, it is unlikely to cause air leakage between the bra ring 313 and the breast due to shaking of the breast pump tee 300, thereby affecting milk extraction.

[0045] In some embodiments of the present invention, a breast pad 350 is provided on the bra ring 313 .

[0046] In some embodiments of the present invention, a vertical drainage surface 315 is provided on the lower side of the milk suction port 312. The vertical design of the vertical drainage surface 315 can ensure that the milk on the vertical drainage surface 315 can flow quickly into the bottle without accumulating on or around the vertical drainage surface 315.

[0047] In some embodiments of the present invention, referring to Figure 7 The rear inner wall of the tee body 310 is provided with an inclined drainage surface 316. This U-shaped surface includes left and right side drainage surfaces 317. The side drainage surfaces 317 are inclined at an angle, allowing milk on the inclined drainage surfaces 316 to flow downward along the angled slope. During breastfeeding, milk sprayed onto the inclined drainage surfaces 316 flows more easily along the side drainage surfaces 317 into the milk outlet 314 and into the feeding bottle 340 for collection.

[0048] In some specific embodiments of the present invention, the cross-section of the connecting edge between the left and right side drainage surfaces 317 is a concave arc.

[0049] In some embodiments of the present invention, a guide surface 318 is provided between the underside of the inclined drainage surface 316 and the milk discharge port 314. The guide surface 318 surrounds the milk discharge port 314, and a turning angle 319 is formed between the front side of the guide surface 318 and the vertical drainage surface 315. Milk on the inclined drainage surface 316 flows along the guide surface 318 toward the milk discharge port 314. The inclined drainage surface 316 ensures that milk on the inner wall of the tee body 310 flows into the milk discharge port 314. The turning angle 319 formed between the guide surface 318 and the vertical drainage surface 315 forms a concave buffer structure, which allows milk on the vertical drainage surface 315 to flow onto the guide surface 318 first, preventing milk from accumulating near the milk suction port 312 and flowing back out.

[0050] Furthermore, the guide surface 318 is a curved surface, and the vertical guide surface 315 is a vertical plane. The angles of the turning angle 319 formed between the vertical guide surface 315 and the guide surface 318 are not fixed, and the maximum angle of the turning angle 319 is 90°.

[0051] It is conceivable that the shape of the guide surface 318 is determined according to the shape of the tee body 310 , and the guide surface 318 may be an inclined plane or a concave arc surface.

[0052] In some embodiments of the present invention, the airbag assembly 320 includes an airbag cover 322 and a soft airbag 323. The soft airbag 323 is installed in the airbag opening 311 of the three-way body 310. The airbag cover 322 is pressed against the soft airbag 323, and an airbag chamber is formed between the airbag cover 322 and the soft airbag 323. The airflow channel 321 is located on the airbag cover 322 and communicates with the airbag chamber.

[0053] When the airbag assembly 320 cooperates with the negative pressure source 200, the airflow channel 321 is connected to the negative pressure pump 210 through a pipeline. The negative pressure pump 210 starts to work intermittently under the control of the control valve 220, causing the soft airbag 323 to rise and fall regularly, thereby causing the volume of the airbag chamber to change at intervals and generate intermittent negative pressure to imitate the action of a baby sucking the breast, so that milk can be sucked out.

[0054] In some embodiments of the present invention, a one-way duckbill valve 330 is installed under the milk discharge port 314. The one-way duckbill valve 330 includes two slanted duckbill surfaces, with a linear hole formed between the undersides of the duckbill surfaces. Milk flowing into the milk discharge port 314 passes through the one-way duckbill valve 330 and flows into the feeding bottle. When the feeding bottle 340 is secured to the breast pump tee 300, the linear hole of the duckbill valve 330 faces and extends into the mouth of the feeding bottle 340.

[0055] During milk extraction, milk enters the one-way duckbill valve 330 and flows out through the linear hole on the lower side of the duckbill under the action of gravity and air pressure. When negative pressure is generated by the airbag assembly 320, the one-way duckbill valve 330 deforms due to the suction force and closes the linear hole, thereby reducing the suction space required to generate negative pressure. This allows the pressure source 200 to achieve better results with less suction force.

[0056] In some embodiments of the present invention, referring to Figure 1 、 Figure 3 The host 100 is provided with a display module 120 for displaying the working status of the entire machine of the present invention.

[0057] In some embodiments of the present invention, a mechanical main switch 130 is provided on the host 100. The entire device of the present invention can only work when the mechanical main switch 130 is turned on. Other buttons of the host 100 can be touch-type or mechanical.

[0058] In some embodiments of the present invention, the breast pump hanging ring 140 on the host 100 is used to place the breast pump tee piece 300 that does not need to be in use.

[0059] In some embodiments of the present invention, a negative pressure interface 230 is provided on the host 100, and the negative pressure interface 230 is connected to the negative pressure pump 210 through a pipeline. Each negative pressure interface 230 is connected to the breast pump T-piece 300 through a pipeline.

[0060] In some embodiments of the present invention, the host 100 is provided with an electrode interface 430, which is electrically connected to the mainboard 110. Each electrode interface 430 is respectively connected to an electrode sheet 420.

[0061] Other structures and operations of the breast pump according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0062] Reference below Figure 1-Figure 3 The dual-pass breast pump according to the embodiment of the present invention is described in detail with reference to a specific embodiment. It is worth noting that the following description is merely an illustrative description and is not intended to limit the present invention.

[0063] like Figure 1 、 Figure 2 、 Figure 3 As shown, the dual-channel breast pump of the present invention includes a host 100, two negative pressure sources 200, two breast pump tees 300, an electric pulse generator 400, and a series battery pack 500.

[0064] The host 100 is provided with a main board 110. The host 100 is provided with a display module 120, a mechanical main switch 130, a negative pressure interface 230, an electrode interface 430, and a breast pump hanging ring 140 is provided on the side of the host 100.

[0065] The negative pressure source 200 includes a first negative pressure source and a second negative pressure source. Each negative pressure source 200 includes a negative pressure pump 210, a control valve 220, and a negative pressure interface 230.

[0066] The breast pump tee 300 includes a first breast pump tee and a second breast pump tee. Each breast pump tee 300 includes a tee body 310 and an airbag assembly 320. The tee body 310 includes an airbag opening 311, a milk suction opening 312, a bra ring 313, a milk discharge opening 314, a vertical drainage surface 315, an inclined drainage surface 316, a side drainage surface 317, and a guide surface 318. A breast pad 350 is provided on the bra ring 313.

[0067] The airbag assembly 320 includes an airbag cover 322 and a soft airbag 323 . The airflow channel 321 is located on the airbag cover 322 .

[0068] The milk outlet 314 is connected to a one-way duckbill valve 330 and communicates with a feeding bottle 340. A threaded ring is provided on the three-way main body 310, and the threaded ring is threadedly connected to the feeding bottle 340.

[0069] The electrical pulse generator 400 includes a pulse unit 410, an electrode sheet 420, and an electrode interface 430. The pulse unit 410 includes a first pulse unit and a second pulse unit. The electrode sheet 420 includes a first electrode sheet and a second electrode sheet, each of which is connected to a corresponding electrode interface 430. The first pulse unit and the second pulse unit control the operation of the first electrode sheet and the second electrode sheet, respectively.

[0070] The series battery pack 500 includes batteries and a charging port 510 , and each battery is connected in series to an electrode interface 430 .

[0071] According to the dual-pass breast pump of the embodiment of the present invention, by such a configuration, at least the following effects can be achieved: each negative pressure source 200 controls the breast pump tee 300 on both sides to perform milk extraction, wherein the corresponding negative pressure source 200 accurately controls the suction force and speed of the negative pressure pump 210 through the control valve 220, thereby independently controlling the suction force and speed of the corresponding breast pump tee 300 during the milk extraction process, matching the working needs of the different conditions of the left and right breasts, and achieving a better milk extraction effect; the electric pulse generator 400 can independently control the current stimulation intensity and duration of the two respective electrode pads 420 through the two pulse units 410, thereby solving the needs of different current intensities, durations, and temperatures required for stimulating the left and right breasts.

[0072] Throughout this specification, references to the terms "some embodiments" or "it is contemplated that" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0073] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A two-way breast pump, characterized in that: include: A host (100) having a built-in motherboard (110); Two negative pressure sources (200), the negative pressure sources (200) comprising a negative pressure pump (210) and a control valve (220), the negative pressure pump (210) and the control valve (220) being electrically connected to the mainboard (110) respectively; Two breast pump tees (300), each of the breast pump tees (300) is connected to each of the negative pressure pumps (210) via a pipeline.

2. The dual-pass breast pump according to claim 1, characterized in that: The negative pressure pump (210) is a piston pump or a diaphragm pump.

3. The dual-pass breast pump according to claim 1 or 2, characterized in that: The control valve (220) is a solenoid valve.

4. The dual-pass breast pump according to claim 1, characterized in that: The invention also includes an electric pulse generator (400) and two electrode sheets (420). The electric pulse generator (400) is located in the host (100). The electric pulse generator (400) is connected to the main board (110) or electrically connected to the main board (110). The electric pulse generator (400) has two pulse units (410), and each pulse unit is electrically connected to each electrode sheet (420).

5. The dual-pass breast pump according to claim 1, characterized in that: A series battery pack (500) is further provided in the host (100). The series battery pack (500) is connected to a charging port (510). The charging port (510) is located on the host (100). The series battery pack (500) is electrically connected to the mainboard (110).

6. The two-way breast pump according to claim 1, characterized in that: The breast pump tee (300) includes a tee main body (310) and an airbag assembly (320). An airbag opening (311) is provided on the upper side of the tee main body (310), and the airbag assembly (320) is located in the airbag opening (311). An airflow channel (321) is provided on the airbag assembly (320), and the airflow channel (321) is connected to the negative pressure pump (210) via a pipeline. A milk suction port (312) is provided on the front side of the tee main body (310), and a bra ring (313) is provided on the milk suction port (312). A milk discharge port (314) is provided on the lower side of the tee main body (310), and the milk discharge port (314) can be communicated with a feeding bottle (340).

7. The two-way breast pump according to claim 6, characterized in that: The shortest horizontal distance between the frontmost position of the bra ring (313) and the frontmost position of the feeding bottle (340) is a, and the value of a is a≤4 cm.

8. The dual-pass breast pump according to claim 6, characterized in that: A vertical drainage surface (315) is provided on the lower side of the milk suction port (312).

9. The two-way breast pump according to claim 8, characterized in that: The rear inner wall of the three-way main body (310) is provided with an inclined drainage surface (316), the inclined drainage surface (316) is a U-shaped surface, and the inclined drainage surface (316) includes left and right side drainage surfaces (317), the side drainage surfaces (317) have an inclined angle, and the milk on the inclined drainage surface (316) flows downward along the inclined angle.

10. The two-way breast pump according to claim 9, characterized in that: A guide surface (318) is provided between the lower side of the inclined drainage surface (316) and the milk discharge port (314). The guide surface (318) surrounds the milk discharge port (314). A turning angle (319) is formed between the front side of the guide surface (318) and the vertical drainage surface (315). Milk on the inclined drainage surface (316) flows along the guide surface (318) to the milk discharge port (314).

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