Breast shield and breast pump

Abstract

The utility model discloses a kind of breast pump shield and breast pump, it is related to maternal and infant articles technical field, wherein, breast pump shield has sequentially connected main conic curved surface section, transition fillet section and connecting section, the inner surface of the connecting place of the main conic curved surface section with the transition fillet section or the inner surface of the transition fillet section is equipped with protruding part, the protruding part is annularly distributed along the inner surface of the connecting place of the main conic curved surface section with the transition fillet section or the inner surface of the transition fillet section;The technical scheme provided by the utility model can improve the comfort and sealing property of breast pump shield when wearing.

Description

Technical Field

[0001] This utility model relates to the field of maternal and infant products technology, and in particular to a breast shield and a breast pump. Background Technology

[0002] A breast pump is a device used to assist breastfeeding mothers in extracting breast milk, helping them collect milk when their babies are not directly suckling. In related technologies, a breast pump typically includes a main unit, a breast shield, and a milk storage container. The main unit is responsible for providing suction and rhythm control to simulate a baby's sucking motion. The breast shield is the part that directly contacts the breast; its main function is to create a sealed environment so that suction can effectively act on the breast, promoting milk flow. The milk storage container is used to collect and store the expressed breast milk.

[0003] A breast shield typically consists of a main conical curved surface section, a transition rounded corner section, and a connecting section along its axis. The main conical curved surface section is designed to match the natural shape of the breast, allowing for a better fit to the breast surface and creating a good sealing environment. The transition rounded corner section smoothly connects the main conical curved surface section to the connecting section and accommodates the breast. The connecting section is the part that connects the breast shield to the main unit, usually via threads, snaps, or other connection methods. However, during use, the fitting end face of the main conical curved surface section often fails to match the contour of the breast surface well, easily leading to poor sealing, air leakage, and uneven suction distribution, thus increasing user discomfort. Utility Model Content

[0004] The main purpose of this invention is to provide a breast shield and a breast pump, which aims to improve the comfort and sealing of the breast shield when worn.

[0005] To achieve the above objectives, the present invention proposes a breast suction shield, which has a main conical curved surface segment, a transition rounded corner segment, and a connecting segment connected in sequence. The inner surface of the connection between the main conical curved surface segment and the transition rounded corner segment or the inner surface of the transition rounded corner segment is provided with a protrusion. The protrusion is distributed in a ring along the inner surface of the connection between the main conical curved surface segment and the transition rounded corner segment or the inner surface of the transition rounded corner segment.

[0006] In one embodiment, the protrusion protrudes along the extension direction perpendicular to the connection between the main conical surface segment and the transition fillet segment, or along the extension direction perpendicular to the transition fillet segment.

[0007] In one embodiment, when the inner surface of the transition rounded corner segment is provided with the protrusion, the protrusion includes at least one arc segment, and each arc segment extends circumferentially along the inner peripheral wall of the breast suction shield and is distributed in a ring.

[0008] In one embodiment, the length of the arc segment is L1, and the perimeter of the protrusion is L2, wherein 1 / 6 ≤ L1: L2 ≤ 1 / 3.

[0009] In one embodiment, the cross-sectional area of ​​the protrusion along the extension direction perpendicular to the connection between the main conical surface segment and the transition fillet segment, or along the extension direction perpendicular to the transition fillet segment, gradually decreases from one end closer to the main conical surface segment to the end farther away from the main conical surface segment.

[0010] In one embodiment, the protrusion is made of a flexible material.

[0011] In one embodiment, a plurality of protrusions are provided at intervals along the axial direction of the breast-sucking shield at the connection between the main conical curved surface segment and the transition rounded corner segment or at the transition rounded corner segment.

[0012] In one embodiment, the height difference between the end point of the protrusion away from the breast shield and the main conical curved surface segment is D, where 1mm≤D≤5mm.

[0013] In one embodiment, the connection between the protrusion and the main conical surface segment and the transition fillet segment, or the connection between the protrusion and the transition fillet segment, is a continuous curved surface.

[0014] In one embodiment, the breast shield includes a support layer and a soft rubber layer, the soft rubber layer being sleeved on the support layer, and the protrusion being provided on the side of the soft rubber layer facing away from the support layer.

[0015] In one embodiment, the protrusion is a protruding piece, which is inclined and has the same inclination direction as the main conical curved surface segment.

[0016] This utility model also proposes a breast pump, comprising:

[0017] Host;

[0018] The breast shield described in any of the preceding claims, wherein the breast shield is detachably connected to the main unit; and

[0019] A milk storage container, which is detachably connected to the main unit.

[0020] In this technical solution, when worn, the main conical curved section first forms an initial fit with the breast surface. The protrusion located at the junction of the root of the main conical curved section and the transition rounded corner section extends outward to form a flexible and deformable "secondary fit ring." When the main unit generates negative pressure, this protrusion is pulled towards the breast surface by suction, automatically filling local depressions or curvature differences in the breast, forming a second sealing interface. The two-stage sealing interface (the end face of the main conical curved section + the protrusion) together prevents air leakage, ensuring a stable and uniform pressure distribution in the negative pressure chamber. The flexible support of the protrusion disperses the concentrated pressure at the edge of the main conical curved section, reducing indentations and friction. The addition of the protrusion significantly improves overall airtightness, balances suction, and reduces pain and discomfort during wear, making the breastfeeding experience closer to a baby's natural sucking, without changing the basic shape of the main conical curved section. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of an embodiment of the breast shield provided by this utility model;

[0023] Figure 2 for Figure 1 Enlarged view of section A in the middle;

[0024] Figure 3 This is a front view of an embodiment of the breast shield provided by this utility model.

[0025] Explanation of icon numbers:

[0026] 100. Breast-absorbing shield; 1. Main conical curved surface section; 2. Transition rounded corner section; 3. Connecting section; 4. Protrusion; 5. Support layer; 6. Soft rubber layer.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0029] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0030] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] This utility model proposes a breast shield 100.

[0032] Please see Figure 1 In one embodiment of the present invention, the breast shield 100 has a main conical curved surface segment 1, a transition rounded corner segment 2 and a connecting segment 3 connected in sequence. The inner surface of the connection between the main conical curved surface segment 1 and the transition rounded corner segment 2 or the inner surface of the transition rounded corner segment 2 is provided with a protrusion 4. The protrusion 4 is distributed in a ring along the inner surface of the connection between the main conical curved surface segment 1 and the transition rounded corner segment 2 or the inner surface of the transition rounded corner segment 2.

[0033] In this technical solution, when worn, the main conical curved section 1 first forms an initial fit with the surface of the breast. The protrusion 4, located at the junction of the root of the main conical curved section 1 and the transition rounded section 2, extends outward to form a flexible and deformable "secondary fit ring". When the main unit generates negative pressure, the protrusion 4 is pulled towards the surface of the breast by suction, automatically filling local depressions or curvature differences in the breast, forming a second sealing interface. The two-stage sealing interface (end face of the main conical curved section 1 + protrusion 4) together block air leakage, so that the negative pressure chamber obtains a stable and uniform pressure distribution. The flexible support of the protrusion 4 disperses the concentrated pressure at the edge of the main conical curved section 1, reducing indentations and friction. The addition of the protrusion 4 significantly improves the overall airtightness, balances the suction, and reduces pain and discomfort during wear without changing the basic shape of the main conical curved surface section 1, making the breast pumping experience closer to the natural sucking of an infant. The protrusion 4 can be a complete circle along the inner surface of the connection between the main conical curved surface section 1 and the transition rounded corner section 2 or along the inner surface of the transition rounded corner section 2, or it can be formed as at least one arc segment along the inner surface of the transition rounded corner section 2. There are no restrictions on this.

[0034] Specifically, in one embodiment, the protrusion 4 protrudes along the extension direction perpendicular to the connection between the main conical curved surface segment 1 and the transition rounded corner segment 2, or along the extension direction perpendicular to the transition rounded corner segment 2. The vertical protrusion design of the protrusion 4 allows it to more effectively fill the tiny gaps between the main conical curved surface segment 1 and the breast surface, significantly improving the sealing performance and reducing air leakage. Due to the enhanced sealing performance, the negative pressure can be applied more evenly to the breast surface, avoiding uneven suction caused by local air leakage and improving milk discharge efficiency. The elastic support of the protrusion 4 reduces local pressure on the breast from the edge of the main conical curved surface segment 1, reducing pain and discomfort during wear and making the breast pumping process more comfortable. The design of the protrusion 4 can adapt to different breast shapes and sizes, improving the versatility and applicability of the breast pump shield 100.

[0035] Furthermore, in one embodiment, when the inner surface of the transition rounded corner segment 2 is provided with a protrusion 4, the protrusion 4 includes at least one arc segment, each arc segment extending circumferentially along the inner peripheral wall of the breast shield 100 and arranged in a ring. When the protrusion 4 is provided on the inner surface of the transition rounded corner segment 2, it can be composed of one or more arc segments, so that the protrusion 4 can form a continuous or segmented sealing structure surrounding the inner peripheral wall of the breast shield 100; each arc segment extending circumferentially along the inner peripheral wall of the breast shield 100 and arranged in a ring can form multiple points or continuous contact with the breast surface. When the breast shield 100 is worn, these arc segments can be finely adjusted according to the shape of the breast to fill the small gaps between the main conical curved surface segment 1 and the breast surface, thereby forming a tighter seal; multiple arc segments extending circumferentially along the inner peripheral wall of the breast shield 100 and arranged in a ring can achieve multi-point contact, further disperse pressure, reduce local pressure, and make the sealing effect more uniform.

[0036] In one embodiment, the length of the arc segment is L1, and the circumference of the protrusion 4 is L2, wherein 1 / 6 ≤ L1:L2 ≤ 1 / 3. By precisely controlling the ratio of the arc segment length to the circumference of the protrusion 4, the length range of the arc segment is controlled, avoiding the arc segment being too long or too short. This allows the arc segment to more effectively fill the tiny gaps between the main conical curved surface segment 1 and the breast surface, significantly improving sealing and reducing air leakage. The design of the proportional range allows the protrusion 4 to adapt to different breast shapes and sizes, improving the versatility and applicability of the breast shield 100. By controlling the ratio of the arc segment length to the circumference of the protrusion 4, the problems of poor sealing, air leakage, and uneven suction distribution are effectively solved, while improving wearing comfort and breast pumping efficiency.

[0037] Please see Figure 2 In one embodiment, the cross-sectional area of ​​the protrusion 4 gradually decreases from the end near the main conical surface segment 1 to the end away from the main conical surface segment 1 along the extension direction perpendicular to the connection between the main conical surface segment 1 and the transition rounded corner segment 2, or along the extension direction perpendicular to the transition rounded corner segment 2. The protrusion 4 forms a tapered structure, which can better adapt to the curvature changes of the breast surface, ensuring a good seal at different positions and improving the versatility and applicability of the breast shield 100. The tapered cross-sectional area design allows the protrusion 4 to form the main sealing area near the main conical surface segment 1, while providing auxiliary sealing at the position away from the main conical surface segment 1, thereby forming a multi-level sealing structure and further reducing air leakage. The tapered cross-sectional area design allows the pressure of the protrusion 4 to be more evenly distributed when it contacts the breast surface. The larger cross-sectional area near the main conical surface segment 1 can disperse the pressure at the initial contact, while the gradually decreasing cross-sectional area avoids excessive local pressure and reduces pain and discomfort during wear.

[0038] In one embodiment, the protrusion 4 is made of a flexible material. The flexible material protrusion 4 can elastically deform under negative pressure, better conforming to the minute irregularities and curvature changes of the breast surface. This elastic deformation allows the protrusion 4 to fill the tiny gaps between the main conical curved section 1 and the breast surface, significantly improving sealing. During breast pumping, the shape and position of the breast may change; the flexible material protrusion 4 can dynamically adapt to these changes, maintaining a good seal and reducing air leakage. When in contact with the breast surface, the flexible material protrusion 4 can disperse pressure, avoiding excessive local pressure. This dispersed pressure distribution reduces pain and discomfort during wear, making the breast pumping process more comfortable. Under negative pressure, the flexible material protrusion 4 can provide gentle support, reducing rigid pressure on breast tissue and further reducing discomfort during wear. The flexible material protrusion 4 can adapt to different breast shapes and sizes. Due to its elastic deformation capability, the protrusion 4 can better conform to various breast contours, improving the versatility and applicability of the breast pump shield 100. The protrusion 4, made of flexible material, can be made of a variety of suitable materials, such as silicone and thermoplastic elastomer (TPE). These materials not only have good elasticity but also biocompatibility, ensuring safe use.

[0039] In one embodiment, multiple protrusions 4 are spaced apart at the connection between the main conical curved surface segment 1 and the transition rounded corner segment 2, or at the transition rounded corner segment 2, along the axial direction of the breast suction shield 100. The multiple protrusions 4 spaced apart along the axial direction of the breast suction shield 100 can form a multi-point or multi-layered seal between the main conical curved surface segment 1 and the breast surface. This multi-point sealing design can more effectively fill tiny gaps, significantly improve sealing performance, and reduce air leakage. The spaced arrangement of the multiple protrusions 4 can distribute pressure to multiple contact points, avoiding excessive local pressure. This distributed pressure reduces pain and discomfort during wear, making the breast suction process more comfortable. The multiple protrusions 4 can adapt to different breast shapes and sizes. Due to their elastic deformation ability, the protrusions 4 can better conform to various breast contours, improving the versatility and applicability of the breast suction shield 100. Under negative pressure, the multiple protrusions 4 can more stably conform to the breast surface, making them less prone to deformation or displacement, thus improving the overall performance of the breast suction shield 100.

[0040] Please see Figure 2In one embodiment, the height difference between the end point of the protrusion 4 furthest from the breast shield 100 and the main conical curved surface section 1 is D, where 1mm ≤ D ≤ 5mm. The height difference D, between 1mm and 5mm, ensures that the protrusion 4 can form effective contact with the breast surface under negative pressure. This range ensures that the protrusion 4 has sufficient height to fill small gaps while avoiding excessive height leading to structural complexity and material waste. The height difference D design allows for more even pressure distribution when the protrusion 4 contacts the breast surface. The 1mm to 5mm height difference range ensures that the protrusion 4 will not generate excessive local pressure on the breast tissue under negative pressure, reducing pain and discomfort during wear. The height difference D design allows the protrusion 4 to adapt to different breast shapes and sizes. The 1mm to 5mm height difference range ensures that the protrusion 4 can form a good seal under different breast contours, improving the versatility and applicability of the breast shield 100.

[0041] Please see Figure 3 In another embodiment, the width of the protrusion 4 is S, where 5mm ≤ S ≤ 15mm. The distance between the two ends of the protrusion 4 along the length of the breast shield 100 is L3, and the distance between the two ends of the protrusion 4 along the height of the breast shield 100 is L4, where 1 ≤ L4 / L3 ≤ 2. The width S of the protrusion 4 is between 5mm and 15mm, ensuring that the protrusion 4 has sufficient width to fill the small gap between the main conical curved surface section and the breast surface, while avoiding structural complexity and material waste caused by excessive width. The design of the ratio 1 ≤ L4 / L3 ≤ 2 makes the extension length of the protrusion 4 in the height direction moderate, allowing it to better conform to the curvature changes of the breast surface and form a tighter seal. This design can significantly reduce air leakage and improve sealing performance. The protrusion 4, with a width S between 5mm and 15mm, disperses pressure upon contact with the breast surface, preventing excessive local pressure and reducing pain and discomfort during wear. The design with a ratio of 1≤L4 / L3≤2 allows the protrusion 4 to deform more flexibly under negative pressure, providing gentler support, reducing pressure on breast tissue, and further minimizing discomfort. The width S and ratio L4 / L3 design enable the protrusion 4 to adapt to different breast shapes and sizes. Due to its elastic deformation capability, the protrusion 4 can better conform to various breast contours, improving the versatility and applicability of the breast shield 100.

[0042] Further, please refer to Figure 2In one embodiment, the connection between the protrusion 4 and the main conical curved surface segment 1 and the transition rounded corner segment 2, or the connection between the protrusion 4 and the transition rounded corner segment 2, is a continuous curved surface. This continuous curved surface design makes the connection between the protrusion 4 and the main conical curved surface segment 1 or the transition rounded corner segment 2 smoother, avoiding micro-gaps caused by abrupt changes at the connection point. This smooth transition allows for better fit to the breast surface, reducing air leakage and significantly improving sealing. The continuous curved surface design also avoids excessive local pressure caused by sharp edges or abrupt changes at the connection point, reducing pain and discomfort during wear. This design makes the protrusion 4 softer when in contact with the breast surface, providing a more comfortable wearing experience. Furthermore, the continuous curved surface design allows the protrusion 4 to better adapt to different breast shapes and sizes. Due to its smooth transition characteristics, the protrusion 4 can better fit various breast contours, improving the versatility and applicability of the breast shield 100.

[0043] Please see Figure 1 In one embodiment, the breast shield 100 includes a support layer 5 and a soft rubber layer 6. The soft rubber layer 6 is fitted over the support layer 5, and a protrusion 4 is provided on the side of the soft rubber layer 6 facing away from the support layer 5. The support layer 5 provides structural strength and stability, while the soft rubber layer 6 provides flexibility and elasticity. This double-layer structure allows the protrusion 4 to better conform to the surface of the breast, fill tiny gaps, and significantly improve the seal. The flexibility and elasticity of the soft rubber layer 6 allow the protrusion 4 to disperse pressure when in contact with the breast surface, avoiding excessive local pressure and reducing pain and discomfort during wear. The material of the soft rubber layer 6 usually has good biocompatibility and tactile feel, providing a more comfortable wearing experience and reducing rigid pressure on breast tissue. The elasticity of the soft rubber layer 6 allows the protrusion 4 to adapt to different breast shapes and sizes. Due to its elastic deformation capability, the protrusion 4 can better conform to various breast contours, improving the versatility and applicability of the breast shield 100.

[0044] In another embodiment, the protrusion 4 and the soft rubber layer 6 are integrally molded. The integral molding ensures that there are no gaps or seams between the two. This seamless connection allows the protrusion 4 to better conform to the surface of the breast, reducing micro-gaps, significantly improving sealing, and reducing air leakage. The integrally molded protrusion 4 and the soft rubber layer 6 can form a continuous sealing surface, ensuring that negative pressure can be applied evenly to the surface of the breast and improving milk drainage efficiency.

[0045] In another embodiment, the protrusion 4 is a protruding piece, which is inclined and aligned with the inclination direction of the main conical curved surface section 1. The inclination direction of the protruding piece aligns with that of the main conical curved surface section 1, allowing it to better conform to the natural curvature of the breast surface. This design fills the tiny gaps between the main conical curved surface section 1 and the breast surface, significantly improving sealing and reducing air leakage. The inclined protruding piece can elastically deform under negative pressure, providing gentle support and reducing rigid pressure on breast tissue, further minimizing discomfort during wear. The inclined protruding piece can adapt to different breast shapes and sizes; due to its elastic deformation capability, it can better conform to various breast contours, improving the versatility and applicability of the breast shield 100.

[0046] This utility model also proposes a breast pump, which includes a main unit, a milk storage container, and a breast shield 100. The specific structure of the breast shield 100 is as described in the above embodiments. Since this breast pump adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The breast shield 100 is detachably connected to the main unit; the milk storage container is detachably connected to the main unit.

[0047] In this embodiment, the main unit is the core of the breast pump, responsible for providing suction and controlling the pumping process. It typically includes a motor, pump, control panel, and power supply. The breast shield 100 is the part that directly contacts the breast and is used to collect milk. The breast shield 100 includes a protrusion 4 to improve the comfort and sealing of the pump. The milk storage container is used to collect and store the pumped milk. The detachable connection makes each component easier to clean and maintain, helps maintain the hygiene of the device and extends its service life. Users can replace different models of breast shields 100 or milk storage containers as needed to adapt to different usage scenarios and personal preferences. The detachable design makes the breast pump easier to disassemble, carry, and store. If a component is damaged or needs to be upgraded, the user can replace that component individually without replacing the entire breast pump, reducing usage costs. The detachable connection between the main unit, breast shield 100, and milk storage container can be achieved by providing threaded structures on the main unit, breast shield 100, and milk storage container, or by providing a slot on the main unit and a buckle on the breast shield 100 and milk storage container. This utility model does not limit this.

[0048] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A breast-sucking shield, the breast-sucking shield having a main conical curved surface segment, a transition rounded corner segment, and a connecting segment connected in sequence, characterized in that, The inner surface of the connection between the main conical surface segment and the transition fillet segment, or the inner surface of the transition fillet segment, is provided with a protrusion, which is distributed in a ring along the inner surface of the connection between the main conical surface segment and the transition fillet segment, or the inner surface of the transition fillet segment.

2. The breast shield as described in claim 1, characterized in that, The protrusion is provided along the extension direction perpendicular to the connection between the main conical surface segment and the transition fillet segment, or along the extension direction perpendicular to the transition fillet segment.

3. The breast shield as described in claim 1, characterized in that, When the inner surface of the transition rounded corner section is provided with the protrusion, the protrusion includes at least one arc segment, and each arc segment extends circumferentially along the inner peripheral wall of the breast suction shield and is distributed in a ring.

4. The breast shield as described in claim 3, characterized in that, The length of the arc segment is L1, and the perimeter of the protrusion is L2, wherein 1 / 6≤L1:L2≤1 / 3.

5. The breast shield as described in any one of claims 1 to 4, characterized in that, The cross-sectional area of ​​the protrusion along the extension direction perpendicular to the connection between the main conical surface segment and the transition fillet segment, or along the extension direction perpendicular to the transition fillet segment, gradually decreases from one end closer to the main conical surface segment to the end farther away from the main conical surface segment.

6. The breast shield as described in any one of claims 1 to 4, characterized in that, The protrusion is made of a flexible material.

7. The breast shield as described in any one of claims 1 to 4, characterized in that, The connection between the main conical curved surface segment and the transition rounded corner segment, or the transition rounded corner segment, is provided with a plurality of protrusions spaced apart along the axial direction of the breast suction shield.

8. The breast shield as described in any one of claims 1 to 4, characterized in that, The height difference between the end point of the protrusion furthest from the breast shield and the main conical curved surface segment is D, where 1mm≤D≤5mm.

9. The breast shield as described in any one of claims 1 to 4, characterized in that, The connection between the protrusion and the main conical surface segment and the transition rounded corner segment, or the connection between the protrusion and the transition rounded corner segment, is a continuous curved surface.

10. The breast shield as described in any one of claims 1 to 4, characterized in that, The breast-absorbing shield includes a support layer and a soft rubber layer. The soft rubber layer is sleeved on the support layer, and the soft rubber layer has the protrusion on the side facing away from the support layer.

11. The breast shield as described in any one of claims 1 to 4, characterized in that, The protrusion is a protruding piece, which is inclined and has the same inclination direction as the main conical curved surface segment.

12. A breast pump, characterized in that, include: Host; The breast shield as described in any one of claims 1 to 11 is detachably connected to the main unit; as well as A milk storage container, which is detachably connected to the main unit.

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