A breast shield assembly

Abstract

The utility model relates to the technical field of maternal and infant products relates to a breast cup assembly, including breast cup and three -way support, breast cup is integrated into one piece structure, and breast cup includes inner chamber, and is located at the outside department of inner chamber, and the department of fitting, installation and breast milk of pasting, three -way support is connected with breast cup, and three -way support is equipped with the through -hole of the breast milk department passes through, and the cooperation department that surrounds and forms the through -hole, and the cooperation department is connected with installation and department corresponding cooperation, still be equipped with sealing connection structure between installation and department and cooperation department, through sealing connection structure closes the assembly gap between breast cup and three -way support, to make breast cup and three -way support sealing connection, be favorable to the connection sealing property of breast cup and strengthen, thereby strengthen the air -tightness in the breast pump, prevent the air leakage when sucking, and further improve the efficiency of sucking.

Description

Technical Field

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

[0002] Breastfeeding usually involves the use of a breast pump, which is used in conjunction with a breast shield. Existing breast shields generally have a horizontal through-hole that corresponds to and connects to the air pressure chamber of the breast pump. When the breast shield is in contact with the breast, the breast passes through the through-hole and extends into the air pressure chamber. The air pressure chamber generates negative pressure, which prompts the breast to express breast milk.

[0003] Existing breast pumps are generally directly snapped into the three-way connector or the main unit of the breast pump for easy disassembly and cleaning. However, assembly gaps are created during the assembly of breast pumps, resulting in poor sealing of the connection and affecting the airtightness of the breast pump, thus reducing milk expression efficiency. Moreover, breast pumps often need to be removed for cleaning and high-temperature sterilization. With long-term and frequent use, breast pumps are prone to wear or deformation, further affecting the sealing of the connection.

[0004] This utility model was proposed in response to the shortcomings of the existing technology. Utility Model Content

[0005] This invention addresses the problem mentioned above where the poor sealing of existing breast shields affects the airtightness of the breast pump, leading to reduced milk extraction efficiency. A breast shield assembly is proposed to address this issue.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A breast shield assembly includes a breast shield and a three-way bracket. The breast shield is a one-piece molded structure, comprising an inner cavity, and a fitting part, a mounting part, and a breast-suction part disposed outside the inner cavity. The three-way bracket is connected to the breast shield, and the three-way bracket has a through hole for the breast-suction part to pass through, and a mating part that surrounds the through hole. The mating part is correspondingly fitted and connected to the mounting part. A sealing connection structure is also provided between the mounting part and the mating part.

[0008] As described above, in a breast shield assembly, the outer periphery of the mounting portion is provided with a first step portion and a second step portion, and a first clamping groove located between the first step portion and the second step portion. The mating portion is correspondingly connected in the first clamping groove, and the first step portion and the second step portion abut against the two sides of the mating portion. The three-way bracket is also provided with a clearance groove corresponding to the first step portion.

[0009] As described above, in a breast shield assembly, the sealing connection structure includes at least one first sealing ring disposed within the first clamping groove, the first sealing ring abutting between the mounting portion and the mating portion, and the first sealing ring being elastic.

[0010] As described above, in a breast shield assembly, the first clamping groove is provided with a connecting wall located between the first step portion and the second step portion, and the outer periphery of the connecting wall is provided with the first sealing ring.

[0011] As described above, in a breast shield assembly, the mating part has an end face on the side facing the main housing, the second stepped part abuts against the end face, and the sealing connection structure further includes a second sealing ring disposed between the second stepped part and the end face, the second sealing ring being elastic.

[0012] In the breast suction cup assembly described above, a plurality of second sealing rings are provided, and each second sealing ring is distributed at radial intervals along the breast suction cup on the side of the second stepped portion facing the end face.

[0013] In the breast shield assembly described above, a sealing sheet is provided on the side of the second step portion away from the mating portion, the sealing sheet and the second step portion having a preset angle, and the sealing sheet being elastic.

[0014] As described above, a breast-sucking bra assembly includes a plurality of sequentially connected elastic wave peak layers, the outer diameter of each elastic wave peak layer gradually decreasing in the direction away from the mounting portion; the elastic wave peak layer includes at least a first wave peak layer connected to the mounting portion, the first wave peak layer being close to the second step portion.

[0015] As described above, in a breast shield assembly, the first clamping groove is further provided with a second clamping groove that is connected to it, and the inner side of the mating part is provided with a snap-fit ​​part extending toward the through hole, and the snap-fit ​​part is correspondingly mated and connected with the second clamping groove.

[0016] As described above, the breast shield assembly further includes a positioning block disposed between the fitting portion and the mounting portion, and the three-way bracket is provided with a limiting groove corresponding to the positioning block, and the positioning block is connected to the limiting groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. A sealing connection structure is set between the mounting part of the breast shield and the mating part of the three-way bracket. The sealing connection structure closes the assembly gap between the breast shield and the three-way bracket, so that the breast shield and the three-way bracket are sealed together. This helps to enhance the connection and sealing performance of the breast shield, thereby enhancing the airtightness inside the breast pump, preventing air leakage during milk expression, and thus improving milk expression efficiency.

[0019] 2. The breast shield has a one-piece molded structure, which further enhances the airtightness of the breast shield and can effectively prevent air and liquid leakage during breast pumping, improve user comfort, and optimize the user experience.

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a perspective view of the breast pump of this utility model;

[0022] Figure 2 Disassembly of the breast pump of this utility model Figure 1 ;

[0023] Figure 3 Disassembly of the breast pump of this utility model Figure 2 ;

[0024] Figure 4 This is a schematic diagram showing the connection between the breast shield and the three-way bracket of this utility model;

[0025] Figure 5 for Figure 4 Longitudinal sectional view of the disassembled mid-suction bra and three-way support;

[0026] Figure 6 for Figure 1 Sectional view A-A in the middle;

[0027] Figure 7 for Figure 6 A magnified view of a portion of the image. Detailed Implementation

[0028] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings. The described embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

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

[0030] Furthermore, the use of terms such as "first" and "second" in this utility model is 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 as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] Example 1:

[0032] like Figure 1 As shown in Figure 7, Figure 6 The arrows in the diagram indicate the direction of the stretching deformation of the breast shield 3 during breast pumping. The axial direction of the breast shield 3 and its installation direction are related to... Figure 6 The arrows in the diagram are parallel to each other, and the radial direction of the breast shield 3 is parallel to... Figure 6 The arrows in the image are perpendicular.

[0033] This utility model provides a breast shield assembly, including a breast shield 3 and a three-way bracket 2. The breast shield 3 is a one-piece molded structure, including an inner cavity 34, and a fitting part 31, a mounting part 32, and a breast-suction part 33 disposed outside the inner cavity 34. The fitting part 31, the mounting part 32, and the breast-suction part 33 enclose and form the inner cavity 34, which opens to one side. The mounting part 32 is disposed between the fitting part 31 and the breast-suction part 33. The three-way bracket 2 is connected to the breast shield 3, and the three-way bracket 2 has a through hole 21 for the breast-suction part 33 to pass through, and a mating part 22 that surrounds and forms the through hole 21. The mounting part 32 is connected to the mounting part 32. A sealing connection structure 4 is provided between the mounting part 32 and the mating part 22. The sealing connection structure 4 seals the assembly gap between the breast shield 3 and the three-way bracket 2, so that the breast shield 3 and the three-way bracket 2 are sealed together. This helps to enhance the connection and sealing of the breast shield 3, thereby enhancing the airtightness inside the breast pump, preventing air leakage during breast pumping, and thus improving breast pumping efficiency. In addition, the breast shield 3 is a one-piece molded structure, which further enhances the airtightness of the breast shield 3. It can effectively prevent air and liquid leakage during breast pumping, improve user comfort, and optimize user experience.

[0034] Optionally, the breast shield assembly can be installed in a manual or electric breast pump, such as... Figure 1 —3、 Figure 6As shown, the breast pump includes a housing 1, which has an air pressure chamber 11 open to one side. A three-way bracket 2 is sealed to the housing 1, and a through hole 21 communicates with the air pressure chamber 11. The mounting part 32 and the mating part 22 are correspondingly connected, allowing the breast shield 3 to be detachably connected to the three-way bracket 2. The breast pump part 33 passes through the through hole 21 and extends into the air pressure chamber 11. The fitting part 31 is located outside the housing 1. During use, the fitting part 31... Fitting the human breast, the breast extends into the inner cavity 34 and passes through the mounting part 32 to face the milk suction part 33. The milk suction part 33 can elastically deform under force, and positive and negative pressure conversion is generated in the air pressure chamber 11 to drive the milk suction part 33 to elastically expand and contract within the air pressure chamber 11. This causes the inner cavity 34 of the breast shield 3 to synchronously generate positive and negative pressure conversion, thereby enabling the milk suction part 33 to simulate the action of an infant sucking the breast, promoting the output of breast milk and improving the milk suction efficiency of the breast pump. Furthermore, the three-way support 2 is provided with a one-way milk outlet channel, and the bottom of the breast shield 3 is provided with a milk outlet corresponding to the one-way milk outlet channel. The milk outlet channel is connected to the one-way milk outlet channel, and a milk receiving container can be set at the lower part of the three-way support 2. Breast milk can flow sequentially through the milk outlet channel and the one-way milk outlet channel into the milk receiving container for feeding the infant.

[0035] In some alternative embodiments, the breast shield 3 is integrally molded from liquid silicone, which enhances the airtightness of the breast shield 3; the liquid silicone is relatively soft and has good sealing performance, which can effectively prevent the breast shield 3 from leaking air and liquid during the breast pumping process, improve the user's comfort, and optimize the user's experience.

[0036] like Figure 3 , Figure 5 and Figure 6As shown, the mounting portion 32 has a first stepped portion 321 and a second stepped portion 322 on its outer periphery, and a first clamping groove 323 located between the first stepped portion 321 and the second stepped portion 322. The first stepped portion 321 is disposed near the fitting portion 31, and the second stepped portion 322 is disposed near the breast suction portion 33. Both the first stepped portion 321 and the second stepped portion 322 extend radially outward along the breast suction cover 3 to form the first clamping groove 323 between the first stepped portion 321 and the second stepped portion 322. During assembly, the mating portion 22 is correspondingly connected to the first clamping groove 323. A stepped portion 321 and a second stepped portion 322 abut against both sides of the mating portion 22, clamping and fixing the mating portion 22 through the first stepped portion 321 and the second stepped portion 322, so that the breast shield 3 is tightly connected to the three-way bracket 2, improving the connection stability of the breast shield 3; the three-way bracket 2 is also provided with a relief groove 23 corresponding to the first stepped portion 321. The relief groove 23 is located on one side of the mating portion 22, and the first stepped portion 321 is engaged with the relief groove 23 to increase the contact area between the mounting portion 32 and the mating portion 22, enhancing the connection sealing of the breast shield 3. It should be noted that the radial direction of the breast shield 3 is perpendicular to the installation direction of the breast shield 3.

[0037] When the breast shield 3 is applied to a breast pump, the second step portion 322 can be fixed between the mating portion 22 and the housing 1. The second step portion 322 is clamped and fixed by the three-way bracket 2 and the housing 1, thereby achieving a tight connection between the breast shield 3, the three-way bracket 2 and the housing 1, which helps to enhance the airtightness inside the breast pump, prevent air leakage during breast pumping, and thus improve breast pumping efficiency.

[0038] like Figure 5As shown in Figure 7, the sealing connection structure 4 includes at least one first sealing ring 41 disposed within the first clamping groove 323. The first sealing ring 41 is disposed on the inner sidewall of the first clamping groove 323 and extends into the first clamping groove 323. The first sealing ring 41 abuts against the mounting part 32 and the mating part 22, and the first sealing ring 41 is elastic. During assembly, the mounting part 32 and the mating part 22 are correspondingly engaged and connected, making the breast pump 3 and the three-way bracket 2 detachably connected. The first sealing ring 41 abuts against the mounting part 32 and the mating part 22 to close the assembly gap between the mounting part 32 and the mating part 22. The first sealing ring 41 has an elastic pre-tightening force, making the breast pump 3 and the three-way bracket 2 more tightly connected, thereby improving the connection stability of the breast pump 3, improving the airtightness inside the breast pump, and thus improving the milk pumping efficiency. Preferably, the first sealing ring 41 preferably extends circumferentially along the first clamping groove 323 to increase the contact area. In addition, during the production process, the breast shield 3 can form the first sealing ring 41 by integral molding, which avoids the formation of additional assembly gaps between the first sealing ring 41 and the breast shield 3, thereby further improving the overall airtightness of the breast shield 3.

[0039] In other alternative embodiments, such as Figure 5 As shown in Figure 7, the first clamping groove 323 is provided with a connecting wall 3231 located between the first step portion 321 and the second step portion 322. The connecting wall 3231 is provided with a first sealing ring 41 on its outer periphery. During the milk suction process, the milk suction part 33 is subjected to the air pressure force in the air pressure chamber 11 and stretches and deforms along the axial direction of the breast suction cover 3 within the air pressure chamber 11. Since the breast suction cover 3 is integrally molded from liquid silicone, when a negative pressure is generated in the air pressure chamber 11 and the milk suction part 33 is stretched and deformed, the first step portion 321 and the second step portion 322 will also be subjected to the same force as the milk suction part 33. The forces acting in the same direction of stretching cause the mating part 22 to press against the housing 1 along the stretching direction of the breast pump 33 via the first step 321 and the second step 322, thereby creating a pneumatic seal between the breast pump 3, the three-way bracket 2 and the housing 1, further improving the airtightness of the breast pump during the milk pumping process and increasing the milk pumping efficiency; at the same time, the friction between the mounting part 32 and the mating part 22 is increased by the first sealing ring 41, and the assembly gap between the mounting part 32 and the mating part 22 is closed, thereby further enhancing the connection and sealing of the breast pump 3.

[0040] Preferably, a plurality of first sealing rings 41 are provided, and each first sealing ring 41 is distributed at intervals along the axial direction of the breast suction shield 3 on the outer periphery of the connecting wall 3231, which is beneficial to further improve the connection sealing between the breast suction shield 3 and the three-way bracket 2; it should be noted that the axial direction of the breast suction shield 3 is parallel to the installation direction of the breast suction shield 3 and the extension and contraction direction of the breast suction part 33.

[0041] In other alternative embodiments, such as Figure 5 As shown in Figure 7, a sealing plate 325 is provided on the side of the second step portion 322 away from the mating portion 22. The sealing plate 325 has a preset included angle with the second step portion 322 and the sealing plate 325 is elastic. In the breast pump, the sealing plate 325 abuts against the housing 1 on the side facing the housing 1. The sealing plate 325 can close the assembly gap between the second step portion 322 and the housing 1, thereby sealing the air pressure chamber 11 and preventing air leakage, which helps to improve the milk pumping efficiency of the breast pump. In addition, during the milk pumping process, as the milk pumping part 33 stretches and deforms, the sealing plate 325 will also undergo elastic deformation between the second step portion 322 and the housing 1, which can increase the contact area between the sealing plate 325 and the housing 1 during milk pumping, thereby enhancing the connection stability and sealing between the breast pump 3 and the housing 1. Preferably, the sealing sheet 325 extends circumferentially along the second step portion 322 to form an annular sealing sheet 325 with an opening facing the housing 1.

[0042] like Figure 5As shown in Figure 7, the breast-suction section 33 includes a plurality of sequentially connected elastic peak layers 331. The outer diameter of each elastic peak layer 331 gradually decreases along the radial direction of the breast-suction cover 3 away from the mounting portion 32. Each elastic peak layer 331 includes at least a first peak layer 331a connected to the mounting portion 32, and the first peak layer 331a is close to the second step portion 322. In some optional embodiments, the elastic peak layers 331 may be provided in multiple layers. For example, the breast-suction section 33 is provided with three layers of elastic peak layers 331, and the elastic peak layers 331 adjacent to each other are arranged in a specific order. The spaced surfaces form a concave structure, and the outer diameter of each elastic crest layer 331 decreases progressively along the direction away from the mounting part 32. When the breast shield 3 is used in a breast pump, the housing 1 is also provided with an air intake channel 12 communicating with the air pressure chamber 11. The first crest layer 331a faces the air intake channel 12. The breast pump can have a built-in or external negative pressure mechanism. The negative pressure mechanism is connected to the air pressure chamber 11 through the air intake channel 12. The negative pressure mechanism causes a change in the air pressure inside the air pressure chamber 11 to achieve positive and negative pressure conversion of the air pressure chamber 11, thereby driving the breast pump to... The milk-suction part 33 undergoes elastic expansion and contraction deformation within the air pressure chamber 11. During milk suction, the air pressure chamber 11 generates negative pressure, and the milk-suction part 33 is stretched and deformed towards the depth of the air pressure chamber 11. That is, each of the elastic wave crest layers 331 is stretched towards the depth of the air pressure chamber 11 layer by layer, and the concave structure between two adjacent elastic wave crest layers 331 is also stretched and deformed, thereby generating negative pressure in the inner cavity 34 of the breast pump 3 to promote the output of breast milk. When the milk-suction part 33 is stretched and deformed towards the depth of the air pressure chamber 11, the first wave crest layer 331a is stretched synchronously and drives the second step portion 322 to press against it. The housing 1 allows the sealing sheet 325 to undergo elastic deformation to increase the contact area with the housing 1. Furthermore, the first wave crest layer 331a is close to the second step portion 322 and the air intake channel 12, and the first wave crest layer 331a faces the communication port between the air intake channel 12 and the air pressure chamber 11. This accelerates the stretching and deformation speed of the first wave crest layer 331a, increases the traction force on the second step portion 322, and is more conducive to achieving the pneumatic seal of the breast pump 3. This further improves the airtightness between the breast pump 3 and the housing 1, and enhances the milk pumping efficiency.

[0043] In other alternative embodiments, to further enhance the tightness of the connection between the breast shield 3 and the three-way bracket 2, such as... Figure 5As shown in Figure 7, the first clamping groove 323 is further provided with a connected second clamping groove 324. The second clamping groove 324 extends radially towards the inner cavity 34 along the breast shield 3. The inner side of the mating part 22 is provided with a snap-fit ​​part 222 extending towards the through hole 21. The snap-fit ​​part 222 extends radially into the through hole 21 and is correspondingly engaged with the second clamping groove 324. In some alternative embodiments, the end face 221 of the mating part 22 extends radially into the through hole 21 to form the snap-fit ​​part 222. The second clamping groove 324 is provided on one side of the second stepped part 322 and corresponds to the snap-fit ​​part 222, so as to increase the contact area between the end face 221 of the mating part 22 and the second stepped part 322, and further make the connection between the breast shield 3 and the three-way bracket 2 tighter.

[0044] In other alternative embodiments, to facilitate the rapid assembly of the breast shield 3, such as Figure 2 As shown in Figure 6, the breast shield 3 further includes a positioning block 35 disposed between the fitting part 31 and the mounting part 32. The three-way bracket 2 is provided with a limiting groove 24 corresponding to the positioning block 35. The positioning block 35 is connected to the limiting groove 24, and the mounting position of the breast shield 3 is positioned by the limiting groove 24, which helps to improve the assembly efficiency of the breast shield 3. Moreover, the connection between the positioning block 35 and the limiting groove 24 can improve the connection stability of the breast shield 3 in the three-way bracket 2. Preferably, the positioning block 35 is disposed at the bottom of the breast shield 3 and close to the fitting part 31, and the limiting groove 24 is correspondingly disposed with the positioning block 35.

[0045] Example 2:

[0046] The difference between Example 2 and Example 1 is that, as Figure 5As shown in Figure 7, the mating part 22 has an end face 221 on one side, and the second stepped part 322 abuts against the end face 221. The sealing connection structure 4 includes a second sealing ring 42 disposed between the second stepped part 322 and the end face 221. The second sealing ring 42 is elastic. In this embodiment, the end face 221 of the mating part 22 is approximately perpendicular to the first clamping groove 323 and abuts against the second stepped part 322. When the breast shield 3 is applied to a breast pump, during the breast pumping process, the breast shield 3 is subjected to positive and negative pressure rotation in the air pressure chamber 11. The change in the effect will cause a certain degree of contraction. This contraction includes the breast shield 3 shrinking inward toward the inner cavity 34 along its radial direction. By setting the second sealing ring 42 in the radial contraction direction of the breast shield 3, the second sealing ring 42 has an elastic pre-tightening force, which helps to increase the connection stability and sealing between the second step portion 322 and the mating portion 22. The second sealing ring 42 can also close the assembly gap between the second step portion 322 and the mating portion 22, further enhancing the connection sealing of the breast shield 3 and improving the airtightness and milk expression efficiency of the breast pump.

[0047] Preferably, a plurality of second sealing rings 42 are provided, and each second sealing ring 42 is distributed at intervals along the radial direction of the breast shield 3 on the side of the second step portion 322 facing the end face 221, which is beneficial to further improve the connection sealing between the breast shield 3 and the three-way bracket 2; it should be noted that the radial direction of the breast shield 3 is perpendicular to the installation direction of the breast shield 3.

[0048] Example 3:

[0049] The difference between Embodiment 3 and the above embodiments is that the sealing connection structure 4 includes a first sealing ring 41 and a second sealing ring 42. The first sealing ring 41 is disposed on the outer peripheral side of the connecting wall 3231, and the second sealing ring 42 is disposed between the end face 221 of the mating part 22 and the second step part 322. More preferably, a plurality of the first sealing ring 41 and the second sealing ring 42 may be provided.

[0050] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A breast shield assembly, characterized in that, include: The breast shield (3) is an integrally molded structure. The breast shield (3) includes an inner cavity (34), and a fitting part (31), a mounting part (32) and a breast suction part (33) disposed outside the inner cavity (34). The three-way bracket (2) is connected to the breast pump (3). The three-way bracket (2) is provided with a through hole (21) through which the breast pump (33) passes and a mating part (22) that surrounds and forms the through hole (21). The mating part (22) is correspondingly mated and connected to the mounting part (32). A sealing connection structure (4) is also provided between the mounting part (32) and the mating part (22).

2. The breast shield assembly as described in claim 1, characterized in that, The mounting part (32) has a first step part (321) and a second step part (322) on its outer periphery, and a first clamping groove (323) located between the first step part (321) and the second step part (322). The mating part (22) is correspondingly connected in the first clamping groove (323), and the first step part (321) and the second step part (322) abut against the two sides of the mating part (22). The three-way bracket (2) is also provided with a relief groove (23) corresponding to the first step portion (321).

3. A breast shield assembly as described in claim 2, characterized in that, The sealing connection structure (4) includes at least one first sealing ring (41) disposed in the first clamping groove (323), the first sealing ring (41) abuts between the mounting part (32) and the mating part (22), and the first sealing ring (41) is elastic.

4. A breast shield assembly as described in claim 3, characterized in that, The first clamping groove (323) is provided with a connecting wall (3231) located between the first step portion (321) and the second step portion (322), and the first sealing ring (41) is provided on the outer periphery of the connecting wall (3231).

5. A breast shield assembly as described in any one of claims 2-4, characterized in that, The mating part (22) has an end face (221) on one side, and the second step part (322) abuts against the end face (221). The sealing connection structure (4) also includes a second sealing ring (42) disposed between the second step part (322) and the end face (221). The second sealing ring (42) is elastic.

6. A breast shield assembly as described in claim 5, characterized in that, The second sealing ring (42) is provided in a plurality of units, and each second sealing ring (42) is distributed radially at intervals along the breast shield (3) on the side of the second step portion (322) facing the end face (221).

7. A breast shield assembly as described in claim 2, characterized in that, A sealing sheet (325) is provided on the side of the second step portion (322) away from the mating portion (22). The sealing sheet (325) has a preset included angle with the second step portion (322), and the sealing sheet (325) is elastic.

8. A breast shield assembly as described in claim 2, characterized in that, The milk suction part (33) includes a plurality of elastic wave peak layers (331) connected in sequence, and the outer diameter of each elastic wave peak layer (331) gradually decreases in the direction away from the mounting part (32); The elastic crest layer (331) includes at least a first crest layer (331a) connected to the mounting portion (32), the first crest layer (331a) being close to the second step portion (322).

9. A breast shield assembly as described in claim 2, characterized in that, The first clamping groove (323) is also provided with a connected second clamping groove (324), and the inner side of the mating part (22) is provided with a snap-fit ​​part (222) extending toward the through hole (21), and the snap-fit ​​part (222) is correspondingly mated and connected with the second clamping groove (324).

10. A breast shield assembly as described in claim 1, characterized in that, The breast shield (3) also includes a positioning block (35) disposed between the fitting part (31) and the mounting part (32), and the three-way bracket (2) is provided with a limiting groove (24) corresponding to the positioning block (35), and the positioning block (35) is connected to the limiting groove (24).

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