Double-layer staggered sealing anti-reflux breast milk bag

Abstract

The utility model belongs to the technical field of breast milk bags, especially a double -layer misplacement sealed anti -reflux breast milk bag, including the bag body that inside has the accommodating chamber and its top is equipped with the opening that communicates with the accommodating chamber, one side of bag body is provided with U -shaped mouth part, the other side of bag body is provided with the clamping portion that is matched with U -shaped mouth part, realize the clamping of clamping portion and U -shaped mouth part through the external force of opposite direction that applies to clamping portion and U -shaped mouth part simultaneously, further realize the sealing of opening, U -shaped mouth part and clamping portion constitute a sealing element, the number of sealing element is at least two groups, still including a with bag body integrated moulding intercepting plate in each group of sealing element, install the intercepting protruding piece that with clamping portion is in contact on intercepting plate, form double -layer sealing through at least two groups of sealing element (U -shaped mouth part and clamping portion), cooperate intercepting protruding piece on intercepting plate, realize misplacement clamping, significantly improve the sealing reliability, effectively prevent breast milk leakage or outside pollution.

Description

Technical Field

[0001] This utility model belongs to the field of breast milk bag technology, specifically relating to a double-layered staggered sealing anti-backflow breast milk bag. Background Technology

[0002] In the field of maternal and infant care, breast milk bags are widely used as a convenient and hygienic tool for storing and transporting breast milk, providing nutritional support for infants.

[0003] Existing breast milk bags mainly consist of a bag body with an internal receiving chamber. An opening at the top of the bag body connects to this chamber, through which breast milk is poured. At the opening, a U-shaped bite-shaped section is installed on one inner wall, and a locking section is provided on the other inner wall. The U-shaped bite-shaped section and the locking section are locally melted by high-frequency electromagnetic waves or a heating plate, and then pressed together to form an integrated connection, ensuring a tight fit. During use, by simultaneously applying opposite forces to the locking section and the U-shaped bite-shaped section, the locking section and the U-shaped bite-shaped section engage, thus sealing the opening and preventing breast milk leakage and external contamination.

[0004] Existing breast milk bags typically rely on a sealing structure consisting of a U-shaped bite and a locking mechanism to achieve an open seal. In practical use, because the sealing point is singular, if this sealing point is subjected to external impact, wear, or manufacturing errors that result in an incomplete seal, breast milk leakage or external contamination can easily occur. This fails to provide a reliable storage environment for breast milk, affecting its quality and safety.

[0005] Furthermore, in existing sealing structures, the sealing pressure is concentrated at the contact points of the U-shaped bite and the locking part during the sealing process, which easily leads to single-point stress concentration. Under long-term use or when subjected to large external forces, this stress concentration can cause material fatigue, deformation, or even damage to the sealing parts, thereby causing seal failure, shortening the service life of the breast milk bag, and increasing the cost of use. Utility Model Content

[0006] To address the above problems, the purpose of this utility model is to provide a double-layered staggered sealing anti-backflow breast milk bag, thereby solving the problems mentioned in the background art.

[0007] This utility model provides a double-layer staggered sealing anti-backflow breast milk bag, including a bag body with an internal receiving chamber and an opening at the top communicating with the receiving chamber. A U-shaped bite portion is provided on one side of the bag body, and a locking portion adapted to the U-shaped bite portion is provided on the other side of the bag body. The locking portion and the U-shaped bite portion are locked together by applying external forces in opposite directions to the locking portion and the U-shaped bite portion simultaneously, thereby sealing the opening. The U-shaped bite portion and the locking portion constitute a sealing element. The number of sealing elements is at least two sets. Each set of sealing elements also includes a flow-blocking plate integrally formed with the bag body. The flow-blocking plate is equipped with a flow-blocking protrusion that abuts against the locking portion.

[0008] Preferably, two adjacent U-shaped bite portions are arranged longitudinally and are fixedly connected to the inner walls of the opposite sides of the bag body.

[0009] Preferably, two adjacent U-shaped bite portions are arranged longitudinally and are fixedly connected to the same inner wall of the bag body.

[0010] Preferably, the baffle plate in each of the seals is fixedly connected to the U-shaped bite portion.

[0011] Preferably, the side wall of the bag is provided with a spout-shaped milk outlet that communicates with the receiving chamber, and a dividing line is marked in the middle of the spout-shaped milk outlet.

[0012] Preferably, the bag also includes an anti-backflow component installed inside the bag body. The anti-backflow component includes a first valve flap disposed on the inner wall of one side of the bag body and a second valve flap located on the other side of the bag body and cooperating with the first valve flap to form a V-shaped valve. The inlet of the V-shaped valve is located directly below the opening of the bag body.

[0013] Preferably, the inner walls on both sides of the bag body are respectively provided with a first limiting block and a second limiting block for restricting the movement direction of the first valve disc and the second valve disc, and the two limiting blocks are respectively located on the side of the first valve disc and the second valve disc close to the sealing element.

[0014] The beneficial effects of this utility model are: by forming a double seal through at least two sets of sealing parts (U-shaped bite part and locking part), and cooperating with the intercepting protrusion on the intercepting plate, misaligned locking is achieved, which significantly improves the sealing reliability and effectively prevents breast milk leakage or external pollution.

[0015] The first and second valves form a V-shaped valve, which is naturally pushed open by the gravity of the breast milk to allow it to flow out. When the milk flows backward, the valve closes automatically, completely preventing backflow and contamination. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the prior art of this utility model; Figure 2 This is a cross-sectional structural diagram of the prior art of this utility model; Figure 3 This is an enlarged structural diagram of point A in this utility model; Figure 4 This is a schematic diagram of the structure of this utility model; Figure 5 This is a schematic diagram of the first cross-sectional structure of the first embodiment of the present utility model; Figure 6 This is an enlarged structural diagram of point B in this utility model; Figure 7 This is an enlarged structural diagram of point C in this utility model; Figure 8 This is a second cross-sectional structural diagram of the first embodiment of the present invention; Figure 9 This is an enlarged structural diagram of point D in this utility model; Figure 10 This is a cross-sectional structural diagram of the second embodiment of the present invention; Figure 11 This is an enlarged structural diagram of point E in this utility model; Figure 12 This is a schematic diagram of the milk storage structure of this utility model.

[0017] In the diagram: 1. Receiving chamber; 2. Opening; 3. Bag body; 4. U-shaped bite; 5. Locking part; 6. Sealing element; 7. Flow-stopping plate; 8. Flow-stopping protrusion; 9. First valve disc; 10. Second valve disc; 11. V-shaped valve; 12. Spout-shaped milk outlet; 13. Dividing line; 14. Scale line; 15. First limiting block; 16. Second limiting block. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of this utility model in any way.

[0019] like Figure 1-3As shown, this is a conventional breast milk bag of the present invention. It mainly includes a bag body 3 with an internal receiving chamber 1. An opening 2, connected to the receiving chamber 1, is provided at the top of the bag body 3. Breast milk is poured into the receiving chamber 1 through the opening 2. The bag body 3 is made of polyethylene. At the opening 2 of the bag body 3, a U-shaped bite-shaped part 4 is installed on one inner wall, and a locking part 5 is provided on the other inner wall. Both the U-shaped bite-shaped part 4 and the locking part 5 can be used to partially melt the plastic material (such as PE or PP) of the bag body 3 via high-frequency electromagnetic waves or a heating plate. Then, pressure is applied to form an integrated connection. The locking part 5 and the U-shaped bite part 4 are locked together by applying opposite external forces to the locking part 5 and the U-shaped bite part 4 at the same time, thereby sealing the opening 2. When pouring breast milk, in order to prevent breast milk from spilling, a spout-shaped milk outlet 12 is connected to one side of the bag body 3. The spout-shaped milk outlet 12 is marked with a dividing line 13. By cutting along the dividing line 13 with scissors, a hole is cut in the spout-shaped milk outlet 12 so that the breast milk can be discharged through the hole. The above is an introduction to the existing breast milk bag.

[0020] As described above, existing breast milk bags have the following drawbacks in use. They typically rely on a sealing structure consisting of a U-shaped bite 4 and a locking part 5 to seal the opening 2. In practical use, because the sealing point is singular, if this point is subjected to external impact, wear, or manufacturing errors leading to a loose seal, breast milk leakage or external contamination can easily occur, failing to provide a reliable storage environment for breast milk and affecting its quality and safety. Furthermore, during the sealing process, the sealing pressure is concentrated at the contact point between the U-shaped bite 4 and the locking part 5, easily forming a single-point stress concentration. With prolonged use or under significant external force, this stress concentration can cause material fatigue, deformation, or even damage to the sealing area, leading to seal failure, shortening the lifespan of the breast milk bag, and increasing usage costs. Meanwhile, when shaking the breast milk bag to mix breast milk or performing other operations, the existing breast milk bag lacks an effective anti-backflow device. Breast milk is prone to backflow through the opening 2 during the shaking process, which not only wastes breast milk, but may also contaminate the external environment of the bag body 3 and the user's hands, causing inconvenience and hygiene hazards. Based on the above problems, the present invention adopts the following improvement method to solve them.

[0021] like Figure 4-12As shown, a double-layer staggered-seal anti-backflow breast milk bag, based on the existing technology, increases the number of locking parts 5 and U-shaped bite parts 4, setting at least two. The U-shaped bite parts 4 and locking parts 5 constitute a sealing element 6, and the number of sealing elements 6 is at least two sets. Each set of sealing elements 6 also includes a flow-blocking plate 7 integrally formed with the bag body 3. The flow-blocking plate 7 is equipped with flow-blocking protrusions that abut against the locking parts 5. A double seal is formed by at least two sets of sealing elements 6 (U-shaped bite parts 4 and locking parts 5). With the flow-blocking protrusions on the flow-blocking plate 7, staggered locking is achieved, which significantly improves the sealing reliability and effectively prevents breast milk leakage or external contamination. The design of the flow-blocking protrusions abutting against the locking parts 5 can disperse the sealing pressure, avoid sealing failure caused by single-point stress concentration, and extend the service life of the breast milk bag. In addition, the integrally formed flow-blocking plate 7 and bag body 3 structure simplifies the production process, reduces manufacturing costs, and improves the overall structural strength.

[0022] Furthermore, such as Figure 5-9 As shown, in the first embodiment of this utility model, two adjacent U-shaped bite portions 4 are arranged longitudinally and are fixedly connected to the inner walls of the opposite sides of the bag body 3. The engaging portion 5, which cooperates with the U-shaped bite portion 4, is located on the inner wall of the bag body 3 on the side away from the U-shaped bite portion 4. The flow-blocking plate 7 in each sealing element 6 is fixedly connected to the U-shaped bite portion 4, which can increase the fixing surface of the flow-blocking plate 7, improve the stability of the flow-blocking plate 7, thereby enhancing the overall rigidity of the sealing element 6 and preventing the flow-blocking protrusion 8 from shifting due to the deformation of the bag body 3 during sealing. Figure 6 As shown, the end of the intercepting plate 7 away from the U-shaped bite 4 does not contact the bag body 3. When an external force in opposite directions is applied to both sides of the bag body 3, multiple engaging parts 5 are embedded in the U-shaped bite 4 to seal the opening 2. At the same time, the intercepting protrusion 8 on the intercepting plate 7 in each sealing member 6 abuts against the outer wall of the engaging part 5, adding another sealing point on the basis of the sealing member 6.

[0023] Furthermore, such as Figure 10-11As shown, this is the second embodiment of the present invention. Similar to the first embodiment, two adjacent U-shaped bite portions 4 are also arranged longitudinally and are fixedly connected to the same side inner wall of the bag body 3. They can both be on the left side of the bag body 3 or both on the right side of the bag body 3. The intercepting plate 7 in each sealing member 6 is fixedly connected to the U-shaped bite portion 4. The intercepting plate 7 is located between two adjacent U-shaped bite portions 4. The intercepting protrusion 8 on the intercepting plate 7 in each sealing member 6 abuts against the outer wall of the locking part 5. On the basis of the sealing member 6, another sealing point is added. In the first and second embodiments of the present invention, the number of intercepting protrusions 8 is set to multiple, and the side of them near the locking part 5 is set to be wavy, which can increase the friction between the locking part 5 and the intercepting plate 7 and reduce the risk of the locking part 5 disengaging from the U-shaped bite portion 4. The intercepting protrusion 8, the intercepting plate 7, the U-shaped bite portion 4 and the locking part are all made of the same material as the bag body 3 to avoid contaminating breast milk. Because the bag body 3 is made of transparent material, and considering the plasticity of the intercepting plate 7, the operator can easily observe the position and engagement of the U-shaped bite portion 4 and the locking portion 5 during use. When the locking portion 5 at the top of the bag body 3 is embedded in the U-shaped bite portion 4, the locking portion 5 in the lower sealing member 6 can also be embedded in the U-shaped bite portion 4. In the second embodiment, the U-shaped bite portions 4 are all fixed to the same inner wall of the bag body 3. Since the area to be fixed for the U-shaped bite portions 4 is relatively large, this design simplifies the positioning and connection steps in the production process. Compared with the first embodiment, it is not necessary to perform fixing operations on both sides of the bag body 3 separately for the U-shaped bite portions 4, reducing the difficulty and complexity of the production process, which is beneficial to improving production efficiency and reducing manufacturing costs.

[0024] Furthermore, such as Figure 1-2As shown, to prevent breast milk backflow when the bag body 3 is shaken, an anti-backflow component is installed inside the bag body 3. This anti-backflow component includes a first valve 9 located on the inner wall of one side of the bag body 3 and a second valve 10 located on the other side of the bag body 3 and cooperating with the first valve 9 to form a V-shaped valve 11. The inlet of the V-shaped valve 11 is located directly below the opening 2 of the bag body 3. Both the first valve 9 and the second valve 10 are made of polyethylene, and the angle between the two valves and the side wall of the bag body 3 is an acute angle. When breast milk is poured into the bag body 3 along the opening, the valves are naturally pushed open by the gravity of the breast milk, causing the two valves to move closer to the side wall of the bag body 3 and open the V-shaped valve 11. When the impact force of the breast milk is lost, the two valves automatically reset and close the valve. The V-shaped valve 11 relies on the gravity of the breast milk to open and close the valve, eliminating the need for mechanical parts such as springs, reducing structural complexity, and avoiding functional failure caused by component aging or damage. To further prevent breast milk reflux, a first limiting block 15 and a second limiting block 16 are respectively provided on the inner walls of both sides of the bag body 3 to restrict the movement direction of the first valve 9 and the second valve 10. The two limiting blocks are located on the side of the first valve 9 and the second valve 10 near the sealing element 6. When the two valves move away from each other and the V-shaped valve 11 is opened, the first valve 9 moves away from the first limiting block 15, and the second valve 10 moves away from the second limiting block 16. When the breast milk is not being poured out, the two valves automatically reset. The first valve 9 moves closer to the first limiting block 15 until it is in contact with the first limiting block 15, and the second valve 10 moves closer to the second limiting block 16 until it is in contact with the second limiting block 16, thus preventing the valves from over-resetting and causing the V-shaped valve 11 to lose its anti-reflux function.

[0025] It should be further noted that, in use, both the first and second embodiments of this utility model are the same as those in the prior art, with milk poured from the spout-shaped milk outlet 12, which reduces the milk flow and prevents spillage. The addition of the V-shaped valve 11 also prevents interference with the user's milk pouring process. A scale line 14 is also provided on the outer surface of the bag 3, facilitating the measurement and pouring of the required amount of breast milk. When feeding the baby, one or two bags can be taken out as needed at a time, without the need to cut the opening 2 at the spout-shaped milk outlet 12 and reseal it.

[0026] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0027] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The above examples are only for the purpose of helping to understand the method and core ideas of this utility model. The above description is only a preferred embodiment of this utility model. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of this utility model, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the protection scope of this utility model.

Claims

1. A double-layered staggered-seal anti-backflow breast milk bag, comprising a bag body (3) having an internal receiving chamber (1) and an opening (2) at its top communicating with the receiving chamber (1), wherein a U-shaped bite portion (4) is provided on one side of the bag body (3), and a locking portion (5) adapted to the U-shaped bite portion (4) is provided on the other side of the bag body (3), wherein the locking portion (5) and the U-shaped bite portion (4) are locked together by simultaneously applying external forces in opposite directions to the locking portion (5) and the U-shaped bite portion (4), thereby sealing the opening (2), characterized in that: The U-shaped bite (4) and the locking part (5) constitute a sealing element (6). The number of sealing elements (6) is at least two sets. Each set of sealing elements (6) also includes a flow-blocking plate (7) integrally formed with the bag body (3). The flow-blocking plate (7) is equipped with a flow-blocking protrusion that abuts against the locking part (5).

2. The double-layer staggered sealing anti-backflow breast milk bag according to claim 1, characterized in that: The two adjacent U-shaped bite portions (4) are arranged longitudinally and are fixedly connected to the inner walls of the two sides opposite to the bag body (3).

3. The double-layer staggered sealing anti-backflow breast milk bag according to claim 1, characterized in that: The two adjacent U-shaped bite portions (4) are arranged longitudinally and are fixedly connected to the inner wall of the bag body (3) on the same side.

4. A double-layer staggered sealing anti-backflow breast milk bag according to claim 2 or 3, characterized in that: The baffle plate (7) in each of the seals (6) is fixedly connected to the U-shaped bite portion (4).

5. The double-layer staggered sealing anti-backflow breast milk bag according to claim 1, characterized in that: The side wall of the bag (3) is provided with a spout-shaped milk outlet (12) that communicates with the receiving chamber (1), and the middle of the spout-shaped milk outlet (12) is marked with a dividing line (13).

6. The double-layer staggered sealing anti-backflow breast milk bag according to claim 1, characterized in that: It also includes an anti-backflow assembly installed inside the bag body (3). The anti-backflow assembly includes a first valve disc (9) disposed on the inner wall of one side of the bag body (3) and a second valve disc (10) located on the other side of the bag body (3) and cooperating with the first valve disc (9) to form a V-shaped valve (11). The inlet of the V-shaped valve (11) is located directly below the opening (2) of the bag body (3).

7. The double-layer staggered sealing anti-backflow breast milk bag according to claim 6, characterized in that: The inner walls of both sides of the bag body (3) are respectively provided with a first limiting block (15) and a second limiting block (16) for restricting the movement direction of the first valve disc (9) and the second valve disc (10). The two limiting blocks are respectively located on the side of the first valve disc (9) and the second valve disc (10) close to the seal (6).

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