Check valve suitable for breast pump and breast pump

Abstract

The check valve comprises a hollow valve seat, the bottom of the valve seat is provided with an opening, the top of the valve seat is provided with a supporting rod in a protruding mode in the axial direction of the valve seat, the supporting rod and the valve seat are coaxial, the top of the supporting rod is further coaxially provided with a valve element blocking piece, the valve element blocking piece extends in the circumferential direction of the supporting rod, and the valve element blocking piece extends in the circumferential direction of the supporting rod. A second liquid outlet is formed in the upper surface of the valve seat, the second liquid outlet is communicated with an opening in the bottom of the valve seat, and the valve seat, the supporting rod and the valve element blocking piece are integrally formed. According to the scheme, the check valve is of an integrally-formed structure, does not need to be disassembled or assembled and is convenient to install and clean, through cooperation of the check valve and the three-way piece, the vacuumizing space of the breast pump can be reduced, vacuum negative pressure directly acts on the breast pumping cover connected with the first connector, the pumping time of each time is shortened, and the pumping efficiency of the breast pump is improved.

Description

Technical Field

[0001] This utility model relates to the field of breast pumps, and in particular to a check valve and a breast pump suitable for use in breast pumps. Background Technology

[0002] In a breast pump assembly, the three-way connector includes a first interface for connecting the breast shield, a second interface for connecting the negative pressure structure, and a third interface for connecting the bottle. When using the breast pump, to express breast milk, the breast shield (flared end) is placed on the breast as tightly as possible, and the negative pressure structure creates a vacuum within the pump, drawing milk from the breast inside the shield. To prevent milk backflow into the bottle and reduce the vacuum space, a check valve is typically installed at the interface between the three-way connector and the bottle. This check valve closes under vacuum conditions to prevent backflow and reduce the vacuum space, and opens after the milk is expressed, allowing it to flow into the bottle.

[0003] Existing check valves for breast pumps typically employ duckbill valves. For example, utility model patent CN218458391U discloses a three-way assembly for wearable and detachable breast pumps, and utility model patent CN210812921U discloses a three-way suction device and breast pump for use in breast pumps. Both use duckbill valves connected to the three-way assembly and function as check valves. However, the duckbill valve contains a funnel-shaped cavity. Because this cavity communicates with the three-way assembly, it also participates in the vacuum cycle of the breast pump during negative pressure operation, leading to reduced suction efficiency. Furthermore, the sealing performance and switching sensitivity of the check valve significantly affect the performance of the breast pump. Utility Model Content

[0004] Therefore, in order to solve the above problems, this utility model provides a check valve and a breast pump suitable for use in breast pumps.

[0005] This utility model is achieved through the following technical solution:

[0006] A check valve for use in a breast pump includes a hollow valve seat with an opening at the bottom and a support rod protruding axially from the top. The support rod is coaxial with the valve seat, and a valve core baffle is coaxially mounted on the top of the support rod. The valve core baffle extends circumferentially toward the support rod, with its edge suspended above the top of the support rod. A second outlet is provided on the upper surface of the valve seat, communicating with the bottom opening of the valve seat. The valve seat, support rod, and valve core baffle are integrally formed.

[0007] Preferably, the outer peripheral surface of the valve seat is further provided with a limiting rib.

[0008] Preferably, the bottom of the outer periphery of the valve seat is further provided with an annular limiting boss, and a handle is provided on the bottom of the limiting boss along the axial direction.

[0009] Preferably, the upper surface of the valve seat includes an annular limiting surface and a Y-shaped support integrally formed inside the annular limiting surface. The Y-shaped support divides the annular limiting surface into three second liquid outlets, and the support rod is coaxially disposed on the Y-shaped support.

[0010] The breast pump includes a three-way valve and a check valve for use with a breast pump, as described above.

[0011] Preferably, the three-way connector includes a first interface for connecting to a breast pump, a second interface for connecting to a negative pressure structure, and a third interface for connecting to a baby bottle. The third interface of the three-way connector is provided with a first liquid outlet. The check valve is fixed inside the third interface, and the valve core baffle is attached to the bottom of the first liquid outlet and blocks the first liquid outlet.

[0012] Preferably, the inner circumference of the first liquid outlet is provided with partitions at equal angles, and the partitions all extend along the inner diameter direction of the first liquid outlet.

[0013] Preferably, the third interface has a bottle mounting port, a valve seat fixing port, and a first liquid outlet arranged coaxially from the outside to the inside, with the first liquid outlet located at the top of the bottle mounting port and the valve seat fixing port.

[0014] Preferably, the valve seat fixing port includes a limiting tube, the top of the limiting tube protrudes along its inner circumference and is provided with a limiting step, the valve seat of the check valve passes into the limiting tube, and the upper surface edge of the valve seat abuts against the limiting step, and the limiting boss at the bottom of the outer circumference of the valve seat abuts against the bottom of the limiting tube.

[0015] Preferably, the height of the support rod of the check valve is greater than or equal to the height difference between the first outlet and the limiting step.

[0016] The beneficial effects of this utility model's technical solution are mainly reflected in:

[0017] 1. The edge of the valve core baffle of the check valve is suspended on the top of the support rod, so that the edge of the valve core baffle can deform with the pressure change. Since the valve core baffle is independently protruding from the top of the valve seat through the support rod, it fits the outlet as closely as possible. In the check valve, the valve seat, support rod and valve core baffle are integrally formed, which does not need to be disassembled or assembled, making it easy to install and clean.

[0018] 2. The valve core baffle of the check valve is located at the bottom of the first outlet. The valve core baffle blocks the first outlet or deforms downward to open the first outlet as the pressure changes. Since the valve core baffle protrudes from the top of the valve seat through the support rod, the first outlet and the valve core baffle structure can be set at the top of the third interface of the three-way fitting. The check valve and the three-way fitting structure cooperate to minimize the vacuum space of the breast pump, so that the vacuum negative pressure acts directly on the breast shield connected to the first interface, shortening the pumping time and improving the pumping efficiency of the breast pump.

[0019] 3. The valve seat fixing port inside the third interface and the valve seat of the check valve form multiple mutually tightly fitting limiting structures, thereby ensuring that the check valve is stably fixed in the third interface and ensuring the sealing and stability of the connection between the check valve and the three-way fitting. In addition, a handle is provided at the bottom of the valve seat to facilitate the disassembly and cleaning of the check valve and the three-way fitting.

[0020] 4. The inner circumference of the first liquid outlet is provided with partitions at equal angles. The partitions all extend along the inner diameter of the first liquid outlet. Under negative pressure, these partitions can prevent the valve core baffle from deforming upward, ensuring its sealing performance. The partitions are spaced apart to ensure the liquid outlet area of ​​the first liquid outlet as much as possible and avoid blockage. Attached Figure Description

[0021] Figure 1 It's a 3D diagram of a breast pump;

[0022] Figure 2 This is a cross-sectional view of a breast pump;

[0023] Figure 3 yes Figure 2 Enlarged view of section A;

[0024] Figure 4 This is a sectional view of the tee fitting;

[0025] Figure 5 This is a bottom view of the tee fitting;

[0026] Figure 6 This is a 3D diagram of a check valve suitable for breast pumps;

[0027] Figure 7 This is a bottom view of a check valve suitable for breast pumps. Detailed Implementation

[0028] To make the objectives, advantages, and features of this utility model clearer and more detailed, the following non-limiting description of preferred embodiments will be illustrated and explained. These embodiments are merely typical examples of applying the technical solutions of this utility model; any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of protection claimed by this utility model.

[0029] It should also be stated that in the description of the solution, the terms "center", "upper", "lower", "inner", "outer" and other terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first" and "second" in this solution are used for descriptive purposes only and should not be construed as indicating or implying a ranking of importance, or implicitly specifying the number of technical features shown. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0031] This utility model discloses a check valve 4 suitable for breast pumps, such as Figure 6 , Figure 7 As shown, the valve includes a hollow valve seat 401. The bottom of the valve seat 401 is open, and a support rod 402 protrudes axially from the top of the valve seat 401. A valve core baffle 403 is coaxially disposed on the top of the support rod 402. The valve core baffle 403 extends circumferentially toward the support rod 402, so that the edge of the valve core baffle 403 is suspended above the top of the support rod 402, thereby ensuring that the edge of the valve core baffle 403 can automatically adjust the switch through vertical deformation. A second outlet is provided on the upper surface of the valve seat 401. The liquid outlet 406 is connected to the bottom opening of the valve seat 401. The emulsion flowing to the bottom of the valve core baffle 403 then passes through the second liquid outlet 406 and the bottom opening of the valve seat 401 in sequence, and flows into the inside of the baby bottle 3. The valve seat, support rod and valve core baffle are integrally formed. In a preferred embodiment, the valve seat 401, support rod 402 and valve core baffle 403 are integrally injection molded rubber parts, thereby ensuring the connection stability of each part of the check valve 4 and the cost-effectiveness of production and processing.

[0032] In a preferred embodiment, a limiting rib 408 is also provided on the outer peripheral surface of the valve seat 401 to ensure the firmness of the valve seat installation.

[0033] like Figure 6 , Figure 7As shown, in one embodiment, the bottom of the outer periphery of the valve seat 401 is also provided with an annular limiting boss 407. The bottom of the limiting boss 407 is provided with a handle 409 protruding axially. When it is necessary to separate the check valve 4 and the three-way component 1, the handle 409 can be pulled down to pull the check valve 4 out from the third interface 103, which facilitates the separation and cleaning of the check valve 4 and the three-way component 1.

[0034] like Figure 3 , Figure 6 , Figure 7 As shown, in one embodiment, the upper surface of the valve seat 401 includes an annular limiting surface 404 and a Y-shaped support 405 integrally formed inside the annular limiting surface 404. The Y-shaped support 405 divides the interior of the annular limiting surface 404 into three second liquid outlets 406. The support rod 402 is coaxially arranged on the Y-shaped support 405. On the one hand, the Y-shaped support 405 supports the support rod 402. On the other hand, it ensures that when the valve core baffle 403 at the top of the support rod 402 deforms, the emulsion flows from the deformed valve core baffle 403 to the second liquid outlets 406 between the Y-shaped support 405, and enters the valve seat 401 from the second liquid outlets 406, and finally flows out from the opening at the bottom of the valve seat 401.

[0035] This utility model also discloses a breast pump, including a three-way valve and a check valve 4 as described above for use with a breast pump; Figure 1 , Figure 2 As shown, in some embodiments, the breast pump also includes a breast shield 2 connected to the first interface 101, a negative pressure structure connected to the second interface 102, and a bottle 3 connected to the bottle mounting port 9. The bottle mounting port 9 and the bottle 3 can be connected by threads or by other existing methods, which will not be described in detail here.

[0036] like Figures 2-7 As shown, the three-way connector 1 typically includes a first interface 101 for connecting to the breast pump 2, a second interface 102 for connecting to the negative pressure structure, and a third interface 103 for connecting to the baby bottle 3. The third interface 103 of the three-way connector 1 is provided with a first liquid outlet 5. The negative pressure structure connected to the second interface 102 circulates and generates a vacuum in the breast pump to draw milk from the breast inside the breast pump 2. After the breast secretes milk, the milk flows from the first interface 101 into the three-way connector 1 and flows to the first liquid outlet 5 in the third interface 103, and then enters the baby bottle 3 for storage.

[0037] like Figure 3 , Figure 6 , Figure 7As shown, the check valve 4 is fixed inside the third port 103 of the three-way component 1. The valve core baffle 403 of the check valve 4 is attached to the bottom of the first liquid outlet 5 and blocks the first liquid outlet 5. Specifically, when the negative pressure structure draws air and generates a vacuum negative pressure, the valve core baffle 403 is pressed tightly against the bottom of the first liquid outlet 5 under the action of negative pressure and seals and blocks the first liquid outlet 5, thereby ensuring that the space at the bottom of the first liquid outlet 5 does not participate in the vacuuming cycle of the breast pump and improves the suction efficiency. When the negative pressure disappears, especially when the negative pressure structure releases air, the air pressure inside the three-way component 1 increases. When the emulsion flows into the first liquid outlet 5, the valve core baffle 403 deforms downward under the influence of air pressure and the gravity of the emulsion, and the first liquid outlet 5 opens, allowing the emulsion to flow into the bottom of the valve core baffle 403.

[0038] like Figure 4 , Figure 5 As shown, in some embodiments, partitions 6 are provided at equal angles on the inner circumference of the first outlet 5. The partitions 6 provide support for the top of the valve core baffle 403 and ensure that the milk flows out from the first outlet at the interval between the partitions. The partitions 6 all extend along the inner diameter of the first outlet 5. In a preferred embodiment, the inner ends of the multiple partitions 6 do not contact each other, thereby maximizing the outlet area of ​​the first outlet 5 and avoiding blockage. In addition, the number of partitions 6 can be adjusted according to actual needs. Preferably, three partitions 6 are provided at equal angles on the first outlet 5.

[0039] like Figure 3 , Figure 4 As shown, in some embodiments, the third interface 103 is coaxially arranged from the outside to the inside with a bottle mounting port 9, a valve seat 401 fixing port, and a first liquid outlet 5. The first liquid outlet 5 is located at the top of the bottle mounting port 9 and the valve seat 401 fixing port. Since the valve core baffle 403 blocks the bottom of the first liquid outlet 5, the position of the first liquid outlet 5 and the valve core baffle 403 is the valve switch position. By setting the first liquid outlet 5 at the top of the bottle mounting port 9 and the valve seat 401 fixing port, the valve switch position is higher than the valve seat 401 fixing position and the bottle 3 mounting position, thereby minimizing the space involved in vacuuming, shortening the time of each suction, and improving the suction efficiency of the breast pump.

[0040] like Figure 3 , Figure 4As shown, in some embodiments, the valve seat 401 fixing port includes a limiting tube 7. The top of the limiting tube 7 has a limiting step 8 protruding along its inner circumference. The valve seat 401 passes into the limiting tube 7, and the upper surface edge of the valve seat 401 abuts against the limiting step 8. The annular limiting boss 407 at the bottom of the outer circumference of the valve seat 401 abuts against the bottom of the limiting tube 7. The limiting rib 408 provided on the outer circumference of the valve seat 401 further enhances the stability of the assembly between the valve seat 401 and the inner wall of the limiting tube 7.

[0041] Among them, such as Figure 3 As shown, the height of the support rod 402 should be greater than or equal to the height difference between the first liquid outlet 5 and the limiting step 8, so as to ensure that the valve core baffle 403 at the top of the support rod 402 is in close contact with the bottom of the first liquid outlet 5, and to ensure the sealing performance when the two are connected.

[0042] This utility model has many other embodiments. All technical solutions formed by equivalent transformation or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A check valve suitable for use in a breast pump, comprising a check valve, characterised in that: The check valve comprises a hollow valve seat, the bottom of the valve seat is open, and a support rod is arranged on the top of the valve seat in the axial direction, the support rod is coaxial with the valve seat, a valve core baffle is further arranged on the top of the support rod in the axial direction, the valve core baffle extends towards the circumference of the support rod, and the edge of the valve core baffle is arranged to be suspended on the top of the support rod, the upper surface of the valve seat is provided with a second liquid outlet, the second liquid outlet is communicated with the bottom opening of the valve seat, and the valve seat, the support rod and the valve core baffle are integrally formed.

2. A check valve suitable for use in a breast pump according to claim 1, characterised in that: A limiting convex rib is further arranged on the outer circumferential surface of the valve seat.

3. The check valve suitable for use with a breast pump of claim 1, wherein: An annular limiting convex platform is further arranged on the outer circumferential bottom of the valve seat, and a handle is arranged on the bottom of the limiting convex platform in the axial direction.

4. The check valve suitable for use with a breast pump of claim 1, wherein: The upper surface of the valve seat comprises an annular limiting surface and a Y-shaped support arranged inside the annular limiting surface, the Y-shaped support separates three second liquid outlets inside the annular limiting surface, and the support rod is coaxially arranged on the Y-shaped support.

5. A breast pump comprising a tee piece, characterised in that: The check valve is also suitable for a breast pump.

6. The breast pump of claim 5, wherein: The three-way piece comprises a first interface for connecting a breast pump cover, a second interface for connecting a negative pressure structure, and a third interface for connecting a milk bottle, a first liquid outlet is arranged in the third interface of the three-way piece, the check valve is fixed in the third interface, and the valve core baffle is attached to the bottom of the first liquid outlet and covers the first liquid outlet.

7. The breast pump of claim 6, wherein: The inner circumferences of the first liquid outlet are equally angularly spaced apart by spacers, and the spacers extend in the radial direction of the first liquid outlet.

8. The breast pump of claim 6, wherein: The inside of the third interface is sequentially coaxially provided with a milk bottle mounting port, a valve seat fixing port and a first liquid outlet from the outside to the inside, and the first liquid outlet is located at the top of the milk bottle mounting port and the valve seat fixing port.

9. The breast pump of claim 8, wherein: The valve seat fixing port comprises a limiting tube, a limiting step is arranged on the top of the limiting tube in the radial direction, the valve seat of the check valve penetrates into the limiting tube, the upper surface edge of the valve seat abuts against the limiting step, and the limiting convex platform on the outer circumferential bottom of the valve seat abuts against the bottom of the limiting tube.

10. The breast pump of claim 9, wherein: The height of the support rod of the check valve is greater than or equal to the height difference between the first liquid outlet and the limiting step.

Images