Breast pump
By designing a negative pressure chamber structure with a squeezing section and a flexible diaphragm in the breast pump, the problems of poor milk expression and nipple damage are solved, resulting in more efficient breast milk flow and a more comfortable milk expression experience.
Patent Information
- Application Number
- CN202422935461.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2026-01-20
- Estimated Expiration
- 2034-11-29
AI Technical Summary
The breast shield in existing breast pumps only fits onto the breast through the fitting part, which has limited milk expression effect. Furthermore, increasing the frequency of air pumping or deflating in the negative pressure mechanism or increasing the negative pressure power can cause excessive stretching of the mother's nipples, resulting in redness, swelling, and pain.
Design a breast pump with a squeezing part and a flexible diaphragm inside the breast shield, and a second negative pressure chamber outside the squeezing part. By switching between positive and negative pressure in the first and second negative pressure chambers, breast milk can be promoted to flow out, nipple damage can be reduced, the effect of infant sucking can be simulated, and the milk expression effect can be improved.
The elastic deformation of the squeezing part and the breast shield enhances the flow of breast milk, reduces nipple damage, improves maternal comfort, simulates infant sucking movements, and improves milk extraction.
Smart Images
Figure CN223810744U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of mother and baby electric appliances, especially to a breast pump. BACKGROUND
[0002] Moms during lactation usually use a breast pump to suck out breast milk, and then feed the breast milk to the baby using a feeding bottle. In the existing breast pump, a breast cup is attached to the breast, and the breast pump is provided with a negative pressure mechanism. The negative pressure mechanism generates negative pressure inside the breast cup. The nipple is pulled in the negative pressure environment, and the breast is squeezed by the attachment part of the breast cup at the same time, so that the breast milk flows out. However, the breast cup in the existing breast pump is only attached to the breast by the attachment part, and the breast pumping effect is limited. To enhance the breast pumping effect, the frequency of air extraction by the negative pressure mechanism is increased, or the power of air extraction by the negative pressure mechanism is increased. These two methods not only have poor lactation effect, but also cause the nipple to be excessively pulled, resulting in swelling and pain.
[0003] The utility model is proposed to solve the problems in the prior art. SUMMARY
[0004] The utility model is proposed to solve the problems in the prior art.
[0005] The utility model adopts the technical scheme that:
[0006] A breast pump comprises a casing, a breast cup arranged on one side of the casing, an inner cavity of the breast cup being open to one side, an attachment part arranged outside the inner cavity, and a flexible diaphragm. An extrusion part is arranged between the attachment part and the flexible diaphragm and extends towards the inner cavity. A first negative pressure cavity is arranged outside the flexible diaphragm between the breast cup and the casing, and a second negative pressure cavity is arranged outside the extrusion part. The first negative pressure cavity and the second negative pressure cavity are in communication, and negative pressure is generated in the first negative pressure cavity and the second negative pressure cavity, so that the breast cup and the extrusion part are elastically deformed.
[0007] The extrusion part extends along the circumference of the breast cup at both ends.
[0008] The extrusion part is recessed towards the outside of the breast cup along the radial direction of the breast cup. The inner cavity comprises an attachment cavity formed by the attachment part, a communication port formed by the recessed structure, and a breast pumping cavity formed by the flexible diaphragm. The communication port is arranged between the attachment cavity and the breast pumping cavity.
[0009] The suction part is provided as a U-shaped curved wall body, the curved wall body is provided with an inner wall surface facing the inner cavity, the inner wall surface extends to the fitting part and the flexible diaphragm along the axial direction of the breast cup, and the inner wall surface is connected with the fitting part and the flexible diaphragm through a first arc-shaped connecting segment and a second arc-shaped connecting segment respectively.
[0010] The breast cup is provided with a first connecting part located outside the suction part, the first connecting part is spaced from the outer wall of the suction part to form the second negative pressure cavity, and the second negative pressure cavity is open to the side away from the breast cup; the shell is provided with a mounting cavity open to one side, a second connecting part located outside the mounting cavity, and a step part located at one side of the second connecting part and facing the opening of the mounting cavity; the breast cup is connected with the shell through the corresponding connection of the first connecting part and the second connecting part, the suction part and the flexible diaphragm are arranged in the mounting cavity, and the step part covers the opening of the second negative pressure cavity.
[0011] The second negative pressure cavity is provided with an extension part, the extension part extends to the opening of the second negative pressure cavity, and at least part of the extension part can be opposite to the step part.
[0012] The breast cup is further provided with a third connecting part located between the suction part and the flexible diaphragm, the shell is provided with a fourth connecting part corresponding to the third connecting part, the breast cup is connected with the shell through the corresponding connection of the third connecting part and the fourth connecting part, the first negative pressure cavity is formed between the breast cup and the shell, and the breast cup is provided with an air channel communicated between the first negative pressure cavity and the second negative pressure cavity.
[0013] The breast cup is further provided with a reinforcing rib located at one side of the suction part, the reinforcing rib and the suction part are arranged along the same circumferential direction, the reinforcing rib is provided with one or a plurality of reinforcing ribs, at least one of the reinforcing ribs extends to the side away from the opening of the inner cavity to form a protruding part, and the shell is provided with a clearance groove corresponding to the protruding part.
[0014] The suction part and the breast cup are integrally formed; or the breast cup is an integrally formed structure, and the suction part is secondarily formed on the breast cup.
[0015] The suction part is provided with a plurality of suction parts, and the suction parts are equally and spacedly distributed along the circumferential direction of the breast cup.
[0016] Compared with the prior art, the breast cup is provided with a first connecting part located outside the suction part, the first connecting part is spaced from the outer wall of the suction part to form the second negative pressure cavity, and the second negative pressure cavity is open to the side away from the breast cup; the shell is provided with a mounting cavity open to one side, a second connecting part located outside the mounting cavity, and a step part located at one side of the second connecting part and facing the opening of the mounting cavity; the breast cup is connected with the shell through the corresponding connection of the first connecting part and the second connecting part, the suction part and the flexible diaphragm are arranged in the mounting cavity, and the step part covers the opening of the second negative pressure cavity.
[0017] 1、the utility model discloses a breast cup inside is equipped with extrusion part, and the flexible diaphragm outside is equipped with first negative pressure cavity, the extrusion part outside is equipped with second negative pressure cavity, and first negative pressure cavity and second negative pressure cavity are linked together, when the negative pressure is produced in first negative pressure cavity and second negative pressure cavity, the flexible diaphragm stretches deformation under the negative pressure environment of first negative pressure cavity, makes the negative pressure of inner chamber, promotes the lactation to flow out, simultaneously, because extrusion part and breast cup are closely connected, when the flexible diaphragm stretches deformation under the negative pressure environment of first negative pressure cavity to the depth of first negative pressure cavity, the extrusion part is driven to stretch deformation through breast cup, thereby makes extrusion part away from breast, on the other hand, second negative pressure cavity generates negative pressure along with first negative pressure cavity, promotes the extrusion part to stretch deformation to away from breast further, reduces nipple injury, and enhances the comfort of mother's body;
[0018] 2、when first negative pressure cavity and second negative pressure cavity convert to positive pressure environment, the extrusion part and breast cup rebound and restore original shape, when the extrusion part is attached to the periphery of breast at this time, and exerts force to breast, promotes the lactation reflex, further promotes the lactation to flow out, thereby improves the breast pump's breast pump effect;
[0019] 3、along with the positive and negative pressure environment conversion of first negative pressure cavity and second negative pressure cavity, the breast cup and extrusion part produce elastic deformation relative to breast, thereby produce the effect of simulating the baby's sucking nipple, produce the massage action to breast, effectively stimulate the milk array to produce, make breast better output lactation.
[0020] The utility model will be further explained in connection with the drawings and specific embodiment. DRAWINGS
[0021] Figure 1 It is the perspective drawing of the breast pump of the utility model;
[0022] Figure 2 It is the exploded view of Figure 1 ;
[0023] Figure 3 It is the front view of the breast pump of the utility model;
[0024] Figure 4 It is the A-A section view in Figure 3 ;
[0025] Figure 5 It is the B-B section view in Figure 3 ;
[0026] Figure 6 It is the front view of the breast cup of the utility model;
[0027] Figure 7 It is the perspective drawing of the breast cup of the utility model under the rear view angle;
[0028] Figure 8 is a side view of the breast cup of the utility model;
[0029] Figure 9 is Figure 8 a C-C sectional view in the figure. DETAILED DESCRIPTION
[0030] The embodiments of the utility model will be described below in detail with reference to the drawings. The described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor belong to the protection scope of the utility model.
[0031] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), if the specific posture changes, then the directionality indications also change accordingly.
[0032] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the person skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.
[0033] Example 1:
[0034] As Figure 1The utility model provides a breast pump as shown in 9, the utility model provides a breast pump, including casing 1, be located in the breast cover 2 of casing 1 one side, the breast cover 2 is equipped with the inner chamber 20 that opens to one side, the inosculation 21 and flexible diaphragm 22 of inner chamber 20 outside, be equipped with the extrusion part 23 of the inosculation 21 and flexible diaphragm 22 between to the extension of inner chamber 20, extrusion part 23 also is located in the outside of inner chamber 20, the breast cover 2 with casing 1 between is equipped with the first negative pressure cavity 31 of being located in flexible diaphragm 22 outside, the second negative pressure cavity 32 of being located in extrusion part 23 outside, first negative pressure cavity 31 and second negative pressure cavity 32 are communicated, the negative pressure is produced in first negative pressure cavity 31 and second negative pressure cavity 32, make the breast cover 2 and extrusion part 23 produce elastic deformation.In this embodiment, the inosculation 21 is enclosed and forms inosculation chamber 201, the flexible diaphragm 22 is enclosed and forms breast cavity 202, the extrusion part 23 is enclosed and forms the communicating port 203 of being communicated between inosculation chamber 201 and breast cavity 202, the inner chamber 20 includes inosculation chamber 201, the communicating port 203 and breast cavity 202, the inosculation 21 is inlaid on breast, breast is placed in inosculation chamber 201, and nipple is along inosculation chamber 201 and communicating port 203 and is stretched to breast cavity 202, and extrusion part 23 can be inlaid in the periphery of breast.
[0035] Further, the casing 1 can be built-in or externally connected to a negative pressure mechanism, which can be manually driven or electrically driven, and the breast cover 2 and the extrusion part 23 are made of deformable materials such as silica gel.
[0036] In use, the first negative pressure cavity 31 and the second negative pressure cavity 32 are inflated or deflated by the negative pressure mechanism to generate positive pressure or negative pressure in the first negative pressure cavity 31 and the second negative pressure cavity 32. When the first negative pressure cavity 31 and the second negative pressure cavity 32 generate negative pressure, the flexible diaphragm 22 is stretched and deformed under the negative pressure environment of the first negative pressure cavity 31 to generate negative pressure in the inner cavity 20, promoting the flow of breast milk. At the same time, since the squeezing part 23 and the breast cup 2 are made of variable material and are tightly connected, when the flexible diaphragm 22 is stretched and deformed towards the depth of the first negative pressure cavity 31 under the negative pressure environment of the first negative pressure cavity 31, the breast cup 2 drives the squeezing part 23 to stretch and deform, so that the squeezing part 23 moves away from the breast. On the other hand, the second negative pressure cavity 32 generates negative pressure along with the first negative pressure cavity 31, which promotes the further stretching and deformation of the squeezing part 23 to move away from the breast, reduces the damage to the nipple, and enhances the comfort of the mother. In this process, the squeezing part 23 accumulates elastic energy by stretching and deforming. When the first negative pressure cavity 31 and the second negative pressure cavity 32 are switched to a positive pressure environment, the squeezing part 23 and the breast cup 2 rebound and return to their original state. At this time, the squeezing part 23 is attached to the periphery of the breast and exerts force on the breast, promoting the milk ejection reflex and further promoting the flow of breast milk, thereby improving the pumping effect of the breast pump. Compared with the traditional breast pump which only pumps milk when the negative pressure mechanism is deflated, the breast pump of the present embodiment can also stimulate the breast through the squeezing part 23 when the negative pressure mechanism is inflated, thereby improving the pumping effect. In addition, with the switching of the positive and negative pressure environments of the first negative pressure cavity 31 and the second negative pressure cavity 32, the breast cup 2 and the squeezing part 23 elastically deform relative to the breast, thereby simulating the effect of a baby sucking a nipple and producing a massage action on the breast, effectively stimulating the milk ejection reflex and making the breast better output breast milk. In addition, the squeezing part 23 extends towards the inner cavity 20, which is beneficial to further attach to the breast and improve the sealing effect during pumping, thereby preventing milk from leaking between the breast cup 2 and the breast during pumping. It should be noted that the diameter of the communication port 203 changes with the elastic deformation of the squeezing part 23. When the second negative pressure cavity 32 is in a positive pressure environment, the squeezing part 23 can be attached to the breast. At this time, the diameter of the communication port 203 is the smallest.
[0037] Preferably, the breast cup 2 and the shell 1 are detachably connected to facilitate cleaning of the breast pump.
[0038] Further, as Figure 2—5、7, the breast cup 2 is provided with a first connecting part 24 outside the squeezing part 23, the first connecting part 24 is spaced opposite to the outer wall of the squeezing part 23 to form the second negative pressure cavity 32, and the second negative pressure cavity 32 is open to the side away from the breast cup 2; the shell 1 is provided with a mounting cavity 11 open to one side, a second connecting part 12 outside the mounting cavity 11, and a step part 13 on one side of the second connecting part 12, the mounting cavity 11 is used to accommodate the breast cup 2, the step part 13 is towards the opening of the mounting cavity 11, the breast cup 2 is connected with the shell 1 by corresponding connection of the first connecting part 24 and the second connecting part 12, the squeezing part 23 and the flexible diaphragm 22 are placed in the mounting cavity 11, the step part 13 covers the opening of the second negative pressure cavity 32, the second negative pressure cavity 32 is sealed by the step part 13, so that the second negative pressure cavity 32 is in a sealed environment relative to the outside of the breast cup 2, and the second negative pressure cavity 32 is in communication with the first negative pressure cavity 31 inside the breast cup 2, so as to facilitate the negative pressure mechanism to simultaneously pump air out of the first negative pressure cavity 31 and the second negative pressure cavity 32; in addition, in the breast cup 2, the first connecting part 24 is arranged close to the fitting part 21, in the shell 1, the second connecting part 12 is arranged close to the opening of the mounting cavity 11, and after the breast cup 2 is connected with the shell 1, it is ensured that the fitting part 21 can extend out of the outside of the shell 1, so as to facilitate the fitting part 21 to be attached to the breast of the mother.
[0039] As a preferred embodiment of the present embodiment but not limited, as shown in Figure 4 The first connecting part 24 includes a first convex ring 241 and a second convex ring 242 arranged adjacent to each other, the first convex ring 241 and the second convex ring 242 are arranged in sequence on the outside of the squeezing part 23 along the direction of the breast entering the breast cup 2, the first convex ring 241 is close to the fitting part 21, and the first convex ring 241 extends outward along the radial direction of the breast cup 2, the second convex ring 242 extends toward the flexible diaphragm 22 along the axial direction of the breast cup 2, so that the second convex ring 242 and the outer wall of the breast cup 2 form the second negative pressure cavity 32, the second connecting part 12 is arranged as a stepped connecting part capable of interference fit connection with the first connecting part 24, a sealing ring is arranged between the first connecting part 24 and the second connecting part 12 to seal the connection between the breast cup 2 and the shell 1, so as to avoid air and liquid leakage caused by assembly gap between the first connecting part 24 and the second connecting part 12, in order to improve the user experience, the breast cup 2 is preferably made of flexible material such as silica gel, therefore the sealing ring is preferably arranged on the outer wall of the first connecting part 24, that is, the sealing ring is arranged on the outer wall of the first convex ring 241 and / or the second convex ring 242, the flexible material such as silica gel has elastic pre-tightening force, which can enhance the sealing effect.
[0040] Further, as shown in Figure 5 Fig. 5, the second negative pressure cavity 32 is provided with an extension 25, which extends towards the opening of the second negative pressure cavity 32, and at least part of the extension 25 is opposite to the step portion 13; when the breast cup 2 is installed in the shell 1, the first connecting portion 24 is tightly connected with the second connecting portion 12, the step portion 13 covers the opening of the second negative pressure cavity 32, so that the extension 25 is towards the step portion 13; when the second negative pressure cavity 32 is in a negative pressure environment, the squeezing portion 23 is deformed by stretching under the negative pressure environment, and the squeezing portion 23 is away from the breast; at this time, the extension 25 is pushed by the squeezing portion 23 to move close to the opening of the second negative pressure cavity 32, and the step portion 13 blocks the moving direction of the extension 25 to limit the deformation amount of the squeezing portion 23, thereby ensuring the normal operation of the breast pump. In other embodiments, the extension 25 can be opposite to the step portion 13 and the inner wall of the second negative pressure cavity 32 (i.e. the inner wall of the first connecting portion 24), and the deformation amount of the squeezing portion 23 is limited by the step portion 13 and the inner wall of the second negative pressure cavity 32.
[0041] Further, as shown in Figure 2 Fig. 5, the breast cup 2 is further provided with a third connecting portion 26 between the squeezing portion 23 and the flexible diaphragm 22, and the shell 1 is provided with a fourth connecting portion 14 corresponding to the third connecting portion 26; the third connecting portion 26 and the fourth connecting portion 14 are connected correspondingly to connect the breast cup 2 with the shell 1, and the first negative pressure cavity 31 is formed between the breast cup 2 and the shell 1, and the breast cup 2 is provided with an air passage 33 communicating between the first negative pressure cavity 31 and the second negative pressure cavity 32.
[0042] Optionally, the third connecting portion 26 of the breast cup 2 is arranged between the first connecting portion 24 and the flexible diaphragm 22, the fourth connecting portion 14 of the shell 1 is arranged on one side of the step portion 13, i.e. the step portion 13 is arranged between the second connecting portion 12 and the fourth connecting portion 14, and the third connecting portion 26 and the fourth connecting portion 14 are preferably connected in a shaft hole type interference fit; in order to improve the connection stability between the third connecting portion 26 and the fourth connecting portion 14, one or more clamping structures are further arranged between the third connecting portion 26 and the fourth connecting portion 14, for example, a clamping groove is arranged on the outer side of the third connecting portion 26, and the fourth connecting portion 14 is provided with a buckle corresponding to the clamping groove.
[0043] Preferably, in order to improve the connection sealing between the third connecting part 26 and the fourth connecting part 14, a sealing ring is arranged between the third connecting part 26 and the fourth connecting part 14, for example, a sealing ring is arranged on the outer wall of the third connecting part 26, and the sealing ring abuts against the fourth connecting part 14 to prevent air and liquid leakage; when the breast cup 2 is installed in the shell 1, the flexible diaphragm 22 is spaced apart from a side wall of the installation cavity 11 away from the opening of the installation cavity 11, so that a first negative pressure cavity 31 is formed between the flexible diaphragm 22 and the shell 1, the first negative pressure cavity 31 is communicated with a second negative pressure cavity 32 through an air passage 33, and the first negative pressure cavity 31 can be connected to a negative pressure mechanism, so that a negative pressure is generated in the first negative pressure cavity 31 through the negative pressure mechanism, so that the flexible diaphragm 22 is stretched and deformed in the negative pressure environment.
[0044] As shown in Figure 4 , the flexible diaphragm 22 is stretched along the axial direction of the breast cup 2 towards the deep part of the installation cavity 11, further enhancing the negative pressure effect in the breast cup 202, so that the breast cup 2 can press the breast to promote the output of breast milk; further, the first negative pressure cavity 31 and the second negative pressure cavity 32 are provided with a communication air passage 33, and the air passage 33 is arranged in the breast cup 2, when the negative pressure mechanism pumps air in the first negative pressure cavity 31, the second negative pressure cavity 32 is pumped through the air passage 33 to realize synchronous pumping with the first negative pressure cavity 31, thereby simplifying the negative pressure cavity structure inside the breast pump, and further optimizing the specific structure of the breast cup 2 and the shell 1. It should be noted that when the breast cup 2 is installed in the shell 1, the step part 13 covers the outside of the air passage port 331 in the second negative pressure cavity 32, that is, the step part 13 wraps the air passage 33 in the air passage port 331 in the second negative pressure cavity 32 in the second negative pressure cavity 32, to avoid air leakage.
[0045] Optionally, as shown in Figure 7 , as a preferred embodiment of the present embodiment but not limited, the breast cup 2 further comprises a reinforcing rib 27 on one side of the pressing part 23, and the reinforcing rib 27 and the pressing part 23 are arranged along the same circumferential direction; in the present embodiment, the reinforcing rib 27 is arranged in the second negative pressure cavity 32, and the reinforcing rib 27 is tightly connected with the inner wall of the second negative pressure cavity 32, that is, the reinforcing rib 27 is arranged on one side of the extending part 25 to enhance the structural strength of the breast cup 2; further, the reinforcing rib 27 is provided with one or more, and at least one reinforcing rib 27 extends to form a protruding part 271 away from the opening of the inner cavity 20, and the shell 1 is provided with a displacement slot 15 corresponding to the protruding part 271, as shown in Figure 2 and Figure 4As shown, in this embodiment, at least one reinforcing rib 27 is arranged at the bottom of the second negative pressure cavity 32, and the reinforcing rib 27 extends to form a protruding portion 271 away from the opening of the inner cavity 20. Correspondingly, the displacement slot 15 is arranged at the position close to the bottom of the stepped portion 13. During assembly, the protruding portion 271 is positioned and clamped with the displacement slot 15 in the shell 1, and the breast cup 2 and the shell 1 are connected through the first connecting portion 24 and the second connecting portion 12, so as to facilitate the quick assembly between the breast cup 2 and the shell 1, and facilitate the disassembly of the breast cup 2.
[0046] Optionally, as a preferred embodiment of the present embodiment but not limited, the extrusion portion 23 is integrally formed with the breast cup 2; or the breast cup 2 is an integrally formed structure, and the extrusion portion 23 is secondarily formed on the breast cup 2. Preferably, the breast cup 2 and the extrusion portion 23 are made of a safe and flexible material suitable for mother and baby use, such as silica gel. The breast cup 2 and the extrusion portion 23 are made by injection molding, which is beneficial to enhance the sealing performance of the finished product of the breast cup 2 and avoid air leakage and liquid leakage.
[0047] Embodiment 2:
[0048] As shown in the drawings, Figure 6 Embodiment 2 is based on Embodiment 1, and has the following implementation. The extrusion portion 23 extends along the circumferential direction of the breast cup 2 at both ends. In this embodiment, the extrusion portion 23 can be provided with one, which forms a ring structure in the breast cup 2. The extrusion portion 23 of the ring structure is matched with the external shape of the human breast. The contact area of the extrusion portion 23 on the outside of the breast is increased through the extrusion portion 23, so as to enhance the extrusion effect of the breast cup 2 on the breast and improve the breast pumping efficiency of the breast pump.
[0049] As shown in the drawings, Figure 9 As a preferred embodiment of the present embodiment but not limited, the two ends of the extension portion 25 extend along the circumferential extension direction of the extrusion portion 23, so as to increase the contact area of the extension portion 25 with the inner wall of the stepped portion 13 and the second negative pressure cavity 32, and further improve the control effect on the deformation amount of the extrusion portion 23.
[0050] Embodiment 3:
[0051] As shown in the drawings, Figure 6As shown, the embodiment 3 has the following implementation based on any of the above embodiments, the extrusion part 23 is provided with a concave structure 231 recessed towards the outside of the breast cup 2 along the radial direction of the breast cup 2, the inner cavity 20 includes a fitting cavity 201 formed by the fitting part 21, a communication port 203 formed by the concave structure 231, and a breast cavity 202 formed by the flexible diaphragm 22, the communication port 203 is arranged between the fitting cavity 201 and the breast cavity 202, and when the second negative pressure cavity 32 is in a positive pressure environment, the minimum inner diameter of the communication port 203 is smaller than the inner diameter of the fitting cavity 201; in this embodiment, the concave structure 231 is matched with the outside of the breast, and the inner wall of the extrusion part 23 is formed as a middle-low and two-high contact surface as shown Figure 6 to increase the contact tightness between the extrusion part 23 and the breast; preferably, as shown Figure 4 , the fitting part 21 of the breast cup 2 is provided with a bell-shaped structure, the inner diameter of the fitting part 21 gradually decreases along the direction of the breast entering the inner cavity 20 of the breast cup 2, and the minimum inner diameter of the communication port 203 is smaller than the minimum inner diameter of the fitting part 21.
[0052] Embodiment 4:
[0053] In the embodiment 4 formed by combining the embodiment 2 and the embodiment 3, the extrusion part 23 extends along the circumferential direction of the breast cup 2, and along the radial direction of the breast cup 2, the extrusion part 23 is provided with a concave structure 231 recessed towards the outside of the breast cup 2, so that the communication port 203 matched with the breast is formed in the extrusion part 23, and the contact between the extrusion part 23 and the outside of the breast is more tight through the concave structure 231. It should be noted that when the second negative pressure cavity 32 is in a positive pressure environment, the minimum inner diameter of the communication port 203 of the extrusion part 23 determines the fitting position of the extrusion part 23 relative to the breast, and it is ensured that the nipple can pass through the extrusion part 23 and approach the breast cavity 202.
[0054] Embodiment 5:
[0055] As shown Figure 5As shown, Embodiment 5, based on any of the above embodiments, has the following implementation method: the squeezing part 23 is configured as a U-shaped curved wall, with the U-shaped opening facing the outside of the breast shield 2. The curved wall has an inner wall surface 232 facing the inner cavity 20. The two ends of the inner wall surface 232 extend along the axial direction of the breast shield 2 toward the fitting part 21 and the flexible diaphragm 22, and the two ends of the inner wall surface 232 are respectively connected to the fitting part 21 and the flexible diaphragm 22 through a first arc-shaped connecting section 233 and a second arc-shaped connecting section 234, so that the two ends of the squeezing part 23 smoothly transition with the fitting part 21 and the flexible diaphragm 22, thereby improving the smoothness of the inner wall of the breast shield 2 and making it more comfortable for the user to pump milk.
[0056] In another embodiment, the outer side of the curved wall is provided with an extension 25, which is provided by setting the U-shaped opening of the curved wall toward the outside of the breast shield 2 to accommodate the extension 25.
[0057] Example 6:
[0058] like Figure 6 As shown, Embodiment 6, based on any of the above embodiments, has the following implementation method: a plurality of squeezing parts 23 are provided, and each squeezing part 23 is equally spaced along the circumference of the breast shield 2; for example, in this embodiment, there are two squeezing parts 23, and the two squeezing parts 23 are enclosed to form a communication opening 203 as described in Embodiment 1, and the two squeezing parts 23 are symmetrical in the radial direction of the breast shield 2, and the distance between the two ends of the two squeezing parts 23 is equal, which is beneficial to further enhance the stability of the two squeezing parts 23 adhering to the outside of the breast, thereby improving the stability of the user's breastfeeding.
[0059] Furthermore, such as Figure 7 As shown, reinforcing ribs 27 are provided between the two ends of the two extrusion parts 23. The two reinforcing ribs 27 are connected in the second negative pressure cavity 32 and are tightly connected to the inner wall of the second negative pressure cavity 32, further enhancing the structural strength of the breast shield 2.
[0060] Optionally, as an equivalent implementation of this embodiment and not a limitation, two or more extrusion portions 23 may be provided, and each extrusion portion 23 can be surrounded to form a communication port 203 as described in Embodiment 1, and the structure of each extrusion portion 23 is consistent with the structure of the above embodiment.
[0061] 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 pump, characterized in that The breast pump includes a shell (1), a breast cup (2) arranged on one side of the shell (1), the breast cup (2) is provided with an inner cavity (20) opening to one side, a fitting part (21) and a flexible diaphragm (22) located outside the inner cavity (20), a pressing part (23) is arranged between the fitting part (21) and the flexible diaphragm (22) and extends towards the inner cavity (20), a first negative pressure cavity (31) is arranged outside the flexible diaphragm (22) between the breast cup (2) and the shell (1), a second negative pressure cavity (32) is arranged outside the pressing part (23), the first negative pressure cavity (31) and the second negative pressure cavity (32) are communicated, and negative pressure is generated in the first negative pressure cavity (31) and the second negative pressure cavity (32) to make the breast cup (2) and the pressing part (23) elastically deform.
2. A breast pump as claimed in claim 1, wherein, The pressing part (23) extends along the circumference of the breast cup (2) at both ends.
3. A breast pump as claimed in claim 1 wherein, The pressing part (23) is provided with a concave structure (231) recessed towards the outside of the breast cup (2) along the radial direction of the breast cup (2), the inner cavity (20) includes a fitting cavity (201) formed by the fitting part (21), a communication port (203) formed by the concave structure (231), and a breast pumping cavity (202) formed by the flexible diaphragm (22), and the communication port (203) is arranged between the fitting cavity (201) and the breast pumping cavity (202).
4. A breast pump as claimed in claim 1, wherein, The pressing part (23) is provided as a U-shaped curved wall body, the curved wall body is provided with an inner wall surface (232) facing the inner cavity (20), the inner wall surface (232) extends towards the fitting part (21) and the flexible diaphragm (22) along the axial direction of the breast cup (2) at both ends, and the inner wall surface (232) is connected to the fitting part (21) and the flexible diaphragm (22) through a first arc-shaped connecting segment (233) and a second arc-shaped connecting segment (234) at both ends, respectively.
5. A breast pump as claimed in claim 1 wherein, The breast cup (2) is provided with a first connecting part (24) located outside the pressing part (23), the first connecting part (24) is spaced apart from the outer wall of the pressing part (23) to form the second negative pressure cavity (32), and the second negative pressure cavity (32) opens to the side away from the breast cup (2); The shell (1) is provided with a mounting cavity (11) opening to one side, a second connecting part (12) located outside the mounting cavity (11), and a step part (13) located on one side of the second connecting part (12), the step part (13) faces the opening of the mounting cavity (11), the first connecting part (24) is connected to the second connecting part (12) correspondingly to connect the breast cup (2) and the shell (1), the pressing part (23) and the flexible diaphragm (22) are arranged in the mounting cavity (11), and the step part (13) covers the opening of the second negative pressure cavity (32).
6. A breast pump as claimed in claim 5 wherein, The second negative pressure cavity (32) is provided with an extension part (25) extending towards the opening of the second negative pressure cavity (32), and at least part of the extension part (25) can be opposite to the stepped part (13).
7. A breast pump as claimed in claim 5 wherein, The breast cup (2) is further provided with a third connecting part (26) between the pressing part (23) and the flexible diaphragm (22), and the shell (1) is provided with a fourth connecting part (14) corresponding to the third connecting part (26). The breast cup (2) is connected with the shell (1) through the corresponding connection of the third connecting part (26) and the fourth connecting part (14), and the first negative pressure cavity (31) is formed between the breast cup (2) and the shell (1). The breast cup (2) is provided with an air channel (33) communicating between the first negative pressure cavity (31) and the second negative pressure cavity (32).
8. A breast pump as claimed in claim 1 wherein, The breast cup (2) is further provided with a reinforcing rib (27) on the side of the pressing part (23). The reinforcing rib (27) and the pressing part (23) are arranged along the same circumference. The reinforcing rib (27) is provided with one or more reinforcing ribs, and at least one reinforcing rib (27) extends to the side away from the opening of the inner cavity (20) to form a protruding part (271). The shell (1) is provided with a clearance slot (15) corresponding to the protruding part (271).
9. A breast pump as claimed in claim 1 wherein, The pressing part (23) and the breast cup (2) are integrally formed; Alternatively, the breast cup (2) is an integrally formed structure, and the pressing part (23) is secondarily formed on the breast cup (2).
10. A breast pump according to any one of claims 1 to 9, wherein, The pressing part (23) is provided with a plurality of pressing parts, and each pressing part (23) is equally spaced along the circumference of the breast cup (2).