A one-way valve structure and a breast pump

Abstract

This utility model discloses a one-way valve structure and a breast pump, belonging to the field of fluid control technology. It is used to install on one side of a through-hole and unidirectionally seal the through-hole. The one-way valve structure includes a connector and an elastic diaphragm. The elastic diaphragm is located on the outside of the connector and extends radially outward. A sealing ring extends from the opening of the through-hole. The connector is used for one-way valve installation, allowing the elastic diaphragm to elastically deform and fit against the end of the sealing ring. The elastic diaphragm includes a deformable portion, a sealing portion, and an anti-backflow portion. The deformable portion extends radially along the outside of the connector and is recessed into the through-hole. The sealing portion is located on the outer ring of the deformable portion and supported on the end face of the sealing ring. The anti-backflow portion is located on the outer ring of the sealing portion and extends obliquely in the opposite direction to the extension of the sealing ring. When the elastic diaphragm is subjected to the pressure and buoyancy of the liquid, the liquid acts on the anti-backflow portion, causing it to deform. The sealing portion acts more tightly against the end of the sealing ring, thus effectively preventing backflow.

Description

Technical Field

[0001] This utility model belongs to the field of fluid control technology, and in particular relates to a one-way valve structure. Background Technology

[0002] A check valve is a valve that allows fluid to flow only through the inlet, but prevents the medium from flowing back through the outlet; it is commonly known as a one-way valve. Check valves are also called non-return valves or non-circulating valves. They are used in hydraulic systems to prevent oil from flowing in the opposite direction, or in pneumatic systems to prevent compressed air from flowing in the opposite direction.

[0003] In the field of breast pumps, one-way valves can better collect milk and prevent milk reflux and overflow. For example, Chinese utility model patent document CN222444948U discloses a breast pump, including a breast shield with a wide end and a narrow end, the inner diameter of which gradually increases from the narrow end to the wide end; a milk bowl assembly with a milk storage space; a milk suction tube connected to the milk bowl assembly and extending into the milk storage space, which is connected to the breast shield; and a main unit for providing negative pressure to the milk suction tube. The center of gravity of the breast pump is located either inside the milk suction tube or inside the narrow end of the breast shield when the milk storage space is empty. The breast pump also includes a one-way valve located at the milk outlet N, which allows milk in the milk suction tube to flow unidirectionally into the milk storage space C. For example, a plate-type one-way valve can be used. For example, when there is negative pressure in the milk suction tube, the one-way valve is pressed tightly against the milk outlet N under the action of suction, so that the milk in the milk storage space C cannot flow back. When the suction stops, the milk pushes open the one-way valve under the action of gravity and flows into the milk storage space C.

[0004] Taking the plate-type check valve disclosed in the aforementioned patent document as an example, one end of the check valve has a flexible connecting structure connected to the end of the milk suction tube, and the other end is an open end. The flexible connecting structure allows the check valve to fit against the opening of the milk suction tube, opening when milk enters the milk storage chamber. However, when the milk level in the milk storage space is higher than the free end of the check valve, the buoyancy of the milk and the hydraulic pressure of the milk will push the check valve open, causing milk reflux. Utility Model Content

[0005] The purpose of this invention is to provide a one-way valve structure that solves the problem that the plate-type one-way valve of the existing breast pump is pushed open by the pressure and buoyancy of the milk, causing backflow.

[0006] To achieve the above objectives, this utility model provides a one-way valve structure for being disposed on one side of a through hole and for sealing the through hole in one direction. The one-way valve structure includes a connector and an elastic diaphragm. The elastic diaphragm is disposed on the outside of the connector and extends radially outward. A sealing ring extends from the opening of the through hole. The connector is used for mounting the one-way valve, so that the elastic diaphragm elastically deforms and fits against the end side of the sealing ring.

[0007] The elastic diaphragm includes a deformable portion, a sealing portion, and an anti-backflow portion; the deformable portion extends radially along the outer side of the connector and is recessed into the through hole; the sealing portion is disposed on the outer ring of the deformable portion and supported on the end face of the sealing ring; the anti-backflow portion is disposed on the outer ring of the sealing portion and extends obliquely in the opposite direction to the extension of the sealing ring.

[0008] Furthermore, a connecting rib is provided inside the through hole, the connecting rib has a connecting position, and the connecting position has a plug hole; the connector is connected to the plug hole.

[0009] Furthermore, the deformable part is provided with a handle on the side opposite to the connector.

[0010] Furthermore, the wall thickness of the deformed portion gradually decreases in the direction of outward extension.

[0011] Furthermore, the wall thickness of the anti-backflow section gradually increases in the direction of the outer ring extension.

[0012] Furthermore, the deformable portion is concave to form a spherical structure.

[0013] Furthermore, the elastic diaphragm is integrally formed with the connector.

[0014] The one-way valve structure provided in this utility model embodiment has at least the following technical effects:

[0015] This one-way valve structure utilizes an elastic deformation mechanism to allow the sealing part to elastically and tightly adhere to the end face of the sealing ring, thus sealing the through-hole. When the one-way valve opens, the fluid overcomes the elastic force of the deformation part, causing it to deform and open. When the elastic diaphragm is subjected to the pressure and buoyancy of the liquid, the liquid acts on the anti-backflow part, causing it to deform and the sealing part to act even more tightly against the end of the sealing ring, effectively preventing backflow. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a structural diagram of a breast pump provided in an embodiment of the present invention.

[0018] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0019] Figure 3 This is a diagram showing the installation structure of the one-way valve of the breast pump provided in an embodiment of the present invention. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0021] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, 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. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0024] For details, please refer to one embodiment of the breast pump of this utility model. Figures 1 to 3 The breast pump 100 includes a milk suction channel 110 and a milk storage chamber 120. The milk suction channel 110 has a through hole 111 connecting the milk suction channel 110 and the milk storage chamber 120. A one-way valve 200 is provided on the side of the through hole 111 near the milk storage chamber 120. The one-way valve 200 seals the through hole 111 and opens when milk flows from the milk suction channel 110 into the milk storage chamber 120. Specifically, a sealing ring 130 extends into the milk storage chamber 120 from one end of the through hole 111, and the one-way valve 200 is fitted and sealed with the end of the sealing ring.

[0025] Specifically, refer to Figures 1 to 3 The one-way valve 200 includes a connector 210 and an elastic diaphragm 220. The connector 210 is connected to a connection position 112 within the inspirator 100; in this embodiment, the connector 210 and the connection position 112 are detachable. Specifically, the connection position 112 has a connection hole 113, the connector 210 is mushroom-shaped, and the head of the connector 210 passes through the connection hole 113, with the head of the connector 210 being limited to the other side of the connection position 112. Specifically, a plurality of ribs (not shown in the figures) are provided within the through hole 111, and the connecting ends of the ribs form the connection position 112. To facilitate the assembly of the one-way valve 200 with the connecting rib connection hole 113, a handle 230 is provided on the side of the elastic diaphragm 220 opposite to the connector 210, allowing for easy assembly and disassembly of the connector 210.

[0026] The elastic diaphragm 220 fits into the opening of the sealing ring 130. Specifically, the elastic diaphragm 220 extends outward along the outer edge of the connector 210. The elastic diaphragm 220 is pushed open by the air pressure within the milk suction channel 110, which forms a connected structure with the milk storage chamber 120. When the milk volume in the milk storage chamber 120 reaches the position of the elastic diaphragm 220, the pressure of the milk acts on the elastic diaphragm 220, causing it to seal the sealing ring 130 and prevent milk backflow.

[0027] To facilitate the opening of the elastic diaphragm 220 and the sealing of the through hole 111, the elastic diaphragm 220 of this embodiment includes a deformable portion 221, a sealing portion 222, and an anti-backflow portion 223. See details... Figure 1 , Figure 2 and Figure 3 The deformable portion 221 extends radially outward along the outer side of the connector 210. The deformable portion 221 is recessed into the through hole 111, giving it a spherical structure. Therefore, when the elastic diaphragm 220 opens, it deforms along the inner spherical direction of the deformable portion 221, making it easier to elastically deform and open the through hole 111. The sealing portion 222 is located on the outer ring of the deformable portion 221 and is supported on the end face of the sealing ring 130. The anti-backflow portion 223 is located on the outer ring of the sealing portion 222 and extends obliquely towards the end of the anti-backflow portion 223 that extends in the opposite direction to the sealing ring 130. In this embodiment, when the milk volume in the milk storage chamber 120 reaches the position of the one-way valve 200, the milk surface acts on the bottom side of the elastic diaphragm 220, allowing the elastic diaphragm 220 to close the through hole. Furthermore, when the milk surface acts on the bottom side of the anti-backflow part 223, the anti-backflow part 223 bends and deforms outwards towards the sealing ring 130, wrapping around the sealing ring 130. This prevents milk from entering the space formed by the anti-backflow part 223 and the outer ring of the sealing ring 130, causing the elastic diaphragm 220 to deform downwards and open the through hole. This enhances the one-way sealing effect of the one-way valve 200, preventing milk backflow in the milk storage chamber 120.

[0028] Furthermore, refer to Figure 1 The wall thickness of the deformable portion 221 gradually decreases towards the outer ring. Therefore, the deformable portion 221 is easier to deform closer to the outer ring and less prone to deformation closer to the inner ring, avoiding stress and cracking at the root of the connection between the deformable portion 221 and the connector 310. It also facilitates the deformation and opening of the sealing portion 222, and the deformable portion 221 provides a sufficiently large elastic seal to the through hole 111 of the sealing portion 222. The wall thickness of the anti-backflow portion 221 gradually increases towards the outer ring. Specifically, the cross-section of the anti-backflow portion 221 can be teardrop-shaped. Therefore, when the anti-backflow portion 221 receives the force of the liquid surface, it is easier to deform along the position of the sealing portion 222, resulting in a better fit between the sealing portion 222 and the sealing ring 130.

[0029] Furthermore, the one-way valve 200 is integrally molded from silicone.

[0030] The pressure testing mechanism continues until it detects that the negative pressure value of the milk storage chamber 101 has reached the set maximum negative pressure value.

[0031] 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, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A one-way valve structure, used to be disposed on one side of a through hole and to seal the through hole in one direction; characterized in that, The one-way valve structure includes a connector and an elastic diaphragm; the elastic diaphragm is located on the outside of the connector and extends radially outward, and a sealing ring extends from the opening of the through hole; the connector is used for mounting the one-way valve, so that the elastic diaphragm elastically deforms and fits against the end side of the sealing ring. The elastic diaphragm includes a deformable portion, a sealing portion, and an anti-backflow portion; the deformable portion extends radially along the outer side of the connector and is recessed into the through hole; the sealing portion is disposed on the outer ring of the deformable portion and supported on the end face of the sealing ring; the anti-backflow portion is disposed on the outer ring of the sealing portion and extends obliquely in the opposite direction to the extension of the sealing ring.

2. The one-way valve structure according to claim 1, characterized in that: A connecting rib is provided inside the through hole, and the connecting rib has a connecting position, and the connecting position has a plug hole; the connector is connected to the plug hole.

3. The one-way valve structure according to claim 2, characterized in that: The deformable part also has a handle on the side opposite to the connector.

4. The one-way valve structure according to claim 1, characterized in that: The wall thickness of the deformable part gradually decreases as it extends outward.

5. The one-way valve structure according to claim 3, characterized in that: The wall thickness of the anti-backflow section gradually increases in the direction of the outer ring.

6. The one-way valve structure according to any one of claims 1 to 5, characterized in that: The deformable part is concave to form a spherical structure.

7. The one-way valve structure according to any one of claims 1 to 5, characterized in that: The elastic diaphragm is integrally formed with the connector.

8. A breast pump, characterized in that, The device includes the one-way valve structure as described in any one of claims 1 to 7; the breast pump includes a milk suction channel and a milk storage chamber, the milk suction channel is provided with the through hole, and the through hole connects the milk suction channel and the milk storage chamber.

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