CN116650742A

CN116650742A - breast pump

Info

Publication number: CN116650742A
Application number: CN202310611728.7A
Authority: CN
Inventors: 陈万原; 苏庆洋
Original assignee: Shenzhen Lute Jiacheng Supply Chain Management Co Ltd
Current assignee: Shenzhen Lute Jiacheng Supply Chain Management Co Ltd
Priority date: 2023-05-26
Filing date: 2023-05-26
Publication date: 2023-08-29

Abstract

The invention discloses a breast pump, which comprises a shell, a breast shield, a negative pressure component and a deformation suction part, wherein the negative pressure component is arranged on the shell; the shell is provided with a milk storage cavity and a negative pressure cavity, the breast-sticking cover comprises a flange for being attached to a breast and a nipple passage suitable for placing a nipple, the nipple passage is communicated with the milk storage cavity, the negative pressure component is used for providing negative pressure for the negative pressure cavity, the deformation suction part is connected with a cavity opening of the negative pressure cavity in a sealing way, and negative pressure provided by the negative pressure component is transmitted to the breast-sticking cover so that one side of the deformation suction part is communicated with the negative pressure cavity; the technical scheme of the invention is convenient for daily use of the breast pump.

Description

Breast pump

Technical Field

The invention relates to the technical field of breast pumps, in particular to a breast pump.

Background

As is known, when a puerpera gives off an infant, the puerpera cannot timely express milk, and the infant cannot naturally and smoothly give off milk, and a milk sucking tool is needed to be used for timely milk production; however, some puerpera has excessive sucking capacity after milk production relative to infants, so that the puerpera has breast pain, and the puerpera also needs to suck out excessive milk by a milk sucking tool.

Currently, electric breast pumps are commonly used in the market. Such an electric breast pump generally includes a breast pump body, a breastshield, a negative pressure conductive member, and a milk bottle, wherein the milk bottle, the breastshield, and the breast pump unit are communicated with each other through a three-way member, so that a user needs to hold the breastshield with one hand to press the breast while using the breast pump, and the other hand operates the breast pump body, thereby making the user's operation cumbersome and inconvenient for daily use.

Disclosure of Invention

The main object of the present invention is to provide a breast pump which is intended to facilitate the daily use of the breast pump.

To achieve the above object, the present invention provides a breast pump comprising:

the milk storage device comprises a shell, a milk storage cavity and a negative pressure cavity, wherein the shell is provided with the milk storage cavity and the negative pressure cavity;

a breastshield comprising a flange for fitting with the breast and a nipple tunnel adapted for placing a nipple, the nipple tunnel being in communication with the milk storage chamber;

a negative pressure assembly for providing negative pressure to the negative pressure chamber; and

the deformation suction part is connected with the cavity opening of the negative pressure cavity in a sealing mode, and negative pressure provided by the negative pressure assembly is transmitted to the bra so that one side of the deformation suction part is communicated with the negative pressure cavity.

Optionally, the deformed suction portion is configured as a suction bowl.

Optionally, the suction bowl is sleeved at the cavity opening of the negative pressure cavity.

Optionally, the suction bowl includes deformation main part and certainly deformation turn-ups that deformation main part turned over the formation outward, the accent in negative pressure chamber inlays to be located deformation main part with between the deformation turn-ups, deformation turn-ups laminating in the accent outer wall in negative pressure chamber and/or deformation main part laminating in the accent inner wall in negative pressure chamber.

Optionally, the breast pump comprises a connecting piece, one side of the connecting piece is connected with the nipple passage, the other side of the connecting piece is attached to the inner wall of the deformation main body, and/or the other side of the connecting piece is attached to the flanging so as to transmit negative pressure to the nipple passage.

Optionally, the bra is flexible, and the connecting piece and the bra are integrally arranged.

Optionally, at least one of the connecting piece and the bra is provided with a milk flowing port communicated with the milk storage cavity.

Optionally, the suction bowl is disposed opposite to the nipple tunnel or the suction bowl is disposed coaxially with the nipple tunnel.

Optionally, the negative pressure cavity is disposed opposite to the nipple tunnel or the negative pressure cavity is disposed coaxially with the nipple tunnel.

Optionally, the negative pressure cavity is formed on an inner side wall of the central position of the front side of the shell.

Optionally, the bowl bottom of the suction bowl is in a fold shape.

Optionally, the shell is further provided with an installation cavity, the installation cavity is adjacently arranged in the negative pressure cavity, and the negative pressure component is installed in the installation cavity.

Optionally, the negative pressure assembly includes negative pressure generating part and negative pressure pipe, the negative pressure chamber with be equipped with the air vent on the chamber wall between the installation cavity, the both ends of negative pressure pipe respectively with the gas outlet of negative pressure generating part with the air vent intercommunication.

Optionally, an air guide column connected to the vent hole is arranged in the mounting cavity, and the negative pressure pipe is connected to the air guide column in a sealing manner.

Optionally, the breastshield is connected with the housing to form the milk storage cavity.

The invention discloses a breast pump, which comprises a shell, a breast attaching part, a negative pressure component and a deformation suction part, wherein the shell is provided with a milk storage cavity and a negative pressure cavity, the negative pressure component is arranged on the shell and is used for providing negative pressure for the negative pressure cavity, the breast attaching part comprises a flange used for being attached to a breast and a nipple channel suitable for placing a nipple, further, the deformation suction part is in sealed connection with a cavity opening of the negative pressure cavity, the negative pressure provided by the negative pressure component is transmitted to the breast attaching part, so that one side of the deformation suction part is communicated with the negative pressure cavity, the pressure in the negative pressure cavity is continuously changed through the negative pressure component, the deformation suction part simulates the sucking action of a baby, and the nipple is promoted to secrete milk, meanwhile, the nipple channel is communicated with the milk storage cavity, the flange is attached to the nipple channel, so that a relative airtight space is formed between the flange and the nipple channel, the negative pressure component not only changes the pressure of the negative pressure cavity, but also changes the pressure generated in the nipple channel, and milk in the nipple channel is pushed to flow into the milk storage cavity, the negative pressure cavity and the like, and the like are integrated in the shell, so that a user can conveniently hold the breast pump by a user, and a user only needs to hold the breast pump.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of a breast pump of the present invention from a perspective;

FIG. 2 is a bottom view of the first housing of the breast pump of the present invention;

FIG. 3 is a cross-sectional view of the breast pump of the present invention;

FIG. 4 is a cross-sectional view of a suction bowl in a breast pump of the present invention;

FIG. 5 is a front view of the first housing of the breast pump of the present invention;

FIG. 6 is a schematic view of a breast shield of the present invention from a view;

FIG. 7 is a schematic view of the construction of the breastshield and attachment of the breast pump of the present invention;

FIG. 8 is a front view of the breast pump of the present invention.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, "and/or" throughout this document includes three schemes, taking a and/or B as an example, including a technical scheme, a technical scheme B, and a technical scheme that both a and B satisfy; in addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

Referring to fig. 1 to 3, the present invention proposes a breast pump comprising:

a housing 10, said housing 10 being provided with a milk storage chamber 111 and a negative pressure chamber 112;

the breastshield 31 comprises a flange 311 for fitting with the breast and a nipple tunnel 312 for placing a nipple, the nipple tunnel 312 being in communication with the milk storage chamber 111;

a negative pressure assembly 40 for providing a negative pressure to the negative pressure chamber 112; and

the deformation suction part is connected to the cavity opening of the negative pressure cavity 112 in a sealing manner, and the negative pressure provided by the negative pressure assembly 40 is transferred to the bra 31 so that one side of the deformation suction part is communicated with the negative pressure cavity 112.

The breast pump in the technical scheme of the invention comprises a shell, a nipple attachment 31, a negative pressure component 40 and a deformation suction part, wherein the shell is provided with a milk storage cavity 111 and a negative pressure cavity 112, the negative pressure component 40 is arranged on the shell and is used for providing negative pressure for the negative pressure cavity 112, the nipple attachment 31 comprises a flange 311 used for being attached to a breast and a nipple channel 312 suitable for placing the nipple, further, the deformation suction part is hermetically connected with a cavity opening of the negative pressure cavity 112, the negative pressure provided by the negative pressure component 40 is transmitted to the nipple attachment 31, so that one side of the deformation suction part is communicated with the negative pressure cavity 112, the pressure in the negative pressure cavity 112 is continuously changed through the negative pressure component 40, the deformation suction part simulates the sucking action of a baby, so that the nipple is promoted to secrete milk, meanwhile, the nipple channel 312 is communicated with the milk storage cavity 111, the breast is attached to the flange 311, so that a relative airtight space is formed between the flange 311 and the nipple channel 312, the negative pressure component 40 not only changes the pressure of the negative pressure cavity 112, but also changes due to deformation generated in the suction part sucking process, so that the inside the nipple channel 312 is also changed, and thus the milk storage cavity 111 is conveniently held by a user, and the user can hold the milk in the milk storage cavity 111.

Referring to fig. 3 and fig. 4, in this embodiment, the deformation suction portion is configured as a deformation suction portion 20, where the deformation suction portion 20 is made of flexible materials such as rubber and silica gel, so that the negative pressure component 40 drives the deformation suction portion 20 to deform, thereby simulating sucking action, and meanwhile, the flexible materials such as rubber and silica gel feel soft when contacting with human skin, thereby reducing injury to user skin, and further improving experience of the user; of course, in other embodiments, the deformation suction portion may also be tapered.

Specifically, the deformation suction portion 20 is sleeved at the cavity opening of the negative pressure cavity 112, the sealing connection between the deformation suction portion 20 and the cavity wall of the negative pressure cavity 112 can be realized through a sleeved mode, meanwhile, the sleeved mode is convenient for the installation of the deformation suction portion 20, so that after a user uses the breast pump, the deformation suction portion 20 can be directly pulled out of the cavity opening of the negative pressure cavity 112 by force, the cleaning work of the breast pump can be completed without other auxiliary tools, the daily cleaning of the user is facilitated, the experience of the user is improved, and of course, in other embodiments, external threads are arranged on one of the deformation suction portion 20 and the cavity wall of the negative pressure cavity 112, internal threads are arranged on the other one of the deformation suction portion 20 and the cavity wall of the negative pressure cavity 112, and the deformation suction portion 20 is connected to the cavity opening of the negative pressure cavity 112 in a sealing mode.

Further, the deformation suction portion 20 includes the deformation main body 21 and from deformation turn-ups 22 that deformation main body 21 turned up formed, the accent of negative pressure cavity 112 is inlayed and is located between deformation main body 21 and the deformation turn-ups 22, deformation turn-ups 22 laminate in the accent outer wall of negative pressure cavity 112 and/or deformation main body 21 laminate in the accent inner wall of negative pressure cavity 112, during the installation, through the sealed cooperation of deformation turn-ups 22 and the outer wall of the accent of negative pressure cavity 112 and/or the sealed cooperation of the inner wall of the accent of deformation main body 21 and negative pressure cavity 112, even though deformation suction portion 20 does not overlap the accent of negative pressure cavity 112, also can have sealed effect, avoid milk inflow negative pressure cavity 112, and because the installation direction is the same between the accent of negative pressure suction portion 20 and negative pressure cavity 112, under the negative pressure suction effect, can help deformation suction portion 20 further overlap to locate the accent of negative pressure cavity 112, realize close connection, thereby further increase through the sealed cooperation of deformation turn-ups 22 and deformation main body 21 and the inner wall of the accent of cavity 112, thereby the user's convenient for the cleaning effect of the absorber after the user has increased, and the convenient for the user to detach the effect of the absorber.

Referring to fig. 1 and 7, in this embodiment, the breast pump includes a connecting piece 32, one side of the connecting piece 32 is connected with the nipple tunnel 312, the other side is attached to the inner wall of the deformation main body 21 and/or the other side is attached to the flange, so as to transmit negative pressure to the nipple tunnel 312, the connecting piece 32 is used for connecting the nipple 31 and the deformation suction portion 20, and when the breast pump is installed, in one mode, the connecting piece 32 is inserted into the inner side of the deformation main body 21, so that the deformation main body 21 can be radially pressed, the inner wall of the deformation main body 21 and the cavity opening of the negative pressure cavity 112 can be attached tightly, and further, the sealing effect between the deformation suction portion 20 and the negative pressure cavity 112 can be enhanced, in another mode, the connecting piece 32 is sleeved outside the flange, so that the flange and the outer wall of the cavity opening of the negative pressure cavity 112 can be attached tightly, and further, so that when the deformation main body 21 is affected by the negative pressure assembly 40, the sealing effect between the nipple tunnel 312 can be changed, and milk can flow into the milk storage cavity 111 smoothly.

Optionally, the brassiere 31 is flexible, the connecting piece 32 with the brassiere 31 is integrative to be set up, thereby integrative setting has reduced sealing connection between connecting piece 32 and the brassiere 31, and simultaneously the brassiere 31 is flexible material and also makes the brassiere 31 be when laminating the breast, is difficult for the fraying skin, and then improves user's experience and feel, and wherein flexible material can be materials such as rubber, silica gel.

At least one of the connecting piece 32 and the breast shield 31 is provided with a milk flowing port 321 communicated with the milk storage cavity 111, the nipple passage 312 is communicated with the milk storage cavity 111 through the milk flowing port 321, the breast pump further comprises a check valve 33, the check valve 33 is arranged on the milk flowing port 33, and milk can only flow into the milk storage cavity 111 from the milk flowing port 321 through the check valve 33, so that the milk backflow in the milk storage cavity 111 is avoided, and the milk sucking process can be completed under the conditions of various postures such as standing, sitting, leaning forward, leaning backward and the like of a user; of course, in other embodiments, a one-way valve is also possible.

Preferably, the deformation suction part 20 is arranged opposite to the nipple tunnel 312 or the deformation suction part 20 is arranged coaxially with the nipple tunnel 312, so that areola and nipple can be sucked simultaneously when the breast pump is used for sucking milk, pain caused by pulling the nipple is reduced, milk secretion is facilitated, and user experience and comfort are greatly improved.

Preferably, the negative pressure cavity 112 is disposed opposite to the nipple tunnel 312 or the negative pressure cavity 112 and the nipple tunnel 312 are coaxially disposed, so that the negative pressure in the negative pressure cavity 112 can uniformly act on the deformation suction portion 20 and then uniformly act on the nipple in the nipple tunnel 312, thereby sucking areola and the nipple at the same time when the breast pump is used for sucking milk, reducing pain caused by pulling the nipple, facilitating milk secretion, and greatly improving user experience and comfort.

Optionally, the negative pressure cavity 112 is formed on the inner side wall of the central position of the front side of the casing 10, so that the negative pressure cavity 112 is convenient for processing and forming, the processing cost of the negative pressure cavity 112 is reduced, and meanwhile, the negative pressure cavity 112 is integrated in the casing 10, so that the user can use daily, and the user can complete the breast sucking work by holding the casing 10 with one hand, so that the user can use the breast pump daily.

Specifically, the bowl bottom of the deformation suction part 20 is in a fold shape, and as can be understood, the nipple sizes of different people are different, and the large nipple can be extended into the deformation suction part by being in the fold shape, and meanwhile, the deformation amount of the fold part is small, so that the deformation suction part can basically keep the shape of the deformation suction part 20, the stability of the deformation suction part 20 is further kept, and the milk sucking effect of the breast pump is improved.

In this embodiment, the bra 31 covers the opening of the milk storage cavity 111, so that the milk storage cavity 111 is formed by enclosing the bra 31 and the housing, so that after the user finishes using, the user can directly detach the bra 31 and then directly clean the milk storage cavity 111, the opening of the milk storage cavity 111 is larger, thereby facilitating the cleaning of the milk storage cavity 111 and improving the cleaning efficiency.

Specifically, the outward flange department of casing is equipped with annular turn-ups, pastes brassiere 31 and is equipped with annular seal groove towards one side of casing, and the casing passes through annular turn-ups to be spacing in annular seal groove to make casing sealing connection on pasting brassiere 31, and then not only improved the installation effectiveness between casing and the brassiere 31 of pasting, still improved the sealed effect between the two simultaneously.

Referring to fig. 1 and 8, further, a milk outlet groove 113 is concavely formed at the edge of the milk storage cavity 111, the milk outlet groove 113 is communicated with the milk storage cavity 111, breast milk in the milk storage cavity 111 can be poured out through the milk outlet groove 113, and meanwhile, the breast milk can be communicated with the atmosphere through the milk outlet groove 113, so that the air pressure in the milk storage cavity 111 is ensured to be stable, and the maximum milk storage effect of the milk storage cavity 111 is ensured; in an embodiment, a sealing cover can be arranged at the opening of the milk outlet groove 113, so that milk is prevented from flowing out of the milk outlet groove 113 in the milk sucking process; of course, in another embodiment, the opening of the milk outlet groove 113 is upward, and a sealing cover is not required at this time, so that there is no concern that breast milk flows out of the opening from the milk outlet groove 113.

Referring to fig. 1 and 5, the housing is further provided with an installation cavity 116, the installation cavity 116 is adjacent to the negative pressure cavity 112, the negative pressure assembly 40 is installed in the installation cavity 116, and the milk storage cavity 111 and the installation cavity 116 are separated by the housing, so that the milk storage cavity 111 can be directly cleaned during cleaning without considering interference of the negative pressure assembly 40, and further cleaning efficiency of a user is improved.

In this embodiment, the housing includes a first housing 11 and a second housing 12 detachably connected to the first housing 11, the negative pressure chamber 112 and the milk storage chamber 111 are formed on a side of the first housing 11 facing the breastshield 31, and the mounting chamber 116 is formed between the first housing 11 and the second housing 12 and is located on a side of the first housing 11 facing away from the breastshield 31; the negative pressure cavity 112, the mounting cavity 116 and the milk storage cavity 111 are all disposed in the first housing 11, and the second housing 12 is mounted at an opening of the mounting cavity 116.

Referring to fig. 8, the first casing 11 and the second casing 12 are all arc-shaped, the first casing 11 with the second casing 12 is spliced into the hemisphere, through setting up to the hemisphere be convenient for not only user's gripping, when using the breast pump simultaneously, can laminate breast with the brassiere 31 of breast pump, then the casing deviates from the side of brassiere 31 and the internal face butt of brassiere, makes the breast pump press from both sides and locates between brassiere and the human body, and then makes the user not need handheld breast pump all the time in the sucking process, has liberated both hands, has improved convenience and experience that the user used.

Referring to fig. 1 and 3, specifically, the negative pressure assembly 40 includes a negative pressure generating member 41 and a negative pressure pipe 42, a vent 114 is provided on a cavity wall between the negative pressure cavity 112 and the installation cavity 116, and two ends of the negative pressure pipe 42 are respectively communicated with an air outlet of the negative pressure generating member 41 and the vent 114.

Preferably, an air guide column 115 connected to the vent 114 is disposed in the mounting cavity 116, the negative pressure pipe 42 is connected to the air guide column 115 in a sealing manner, and the air guide column 115 is inserted into the air suction port, so that on one hand, the communication between the negative pressure cavity 112 and the air guide column 115 is realized, and on the other hand, the communication between the air suction assembly and the negative pressure is realized; on the other hand, the air guide column 115 is prevented from being separated from the negative pressure pipe 42, so that the stability of the breast pump is improved, and the use of a user is facilitated.

Further, a sealing ring can be further arranged on the outer wall surface of the air guide column 115 or the inner wall surface of the negative pressure pipe 42, when the air guide column 115 is installed in the negative pressure pipe 42, the sealing ring is clamped between the negative pressure pipe 42 and the air guide column 115, so that the sealing effect between the negative pressure pipe 42 and the air guide column 115 is improved, the working efficiency of the negative pressure generating part 41 is further improved, meanwhile, the air guide column 115 can be prevented from being separated from an air suction component, the stability of the breast pump is improved, and the use of a user is facilitated.

It will be appreciated that the user will wash once after using the breast pump, then place aside and wait for the next use, in the process of placing, paste brassiere 31 can directly expose in the air, and then is stained with the dirty in the air, therefore, in this embodiment, the breast pump still includes shield 50, shield 50 can dismantle the lid and locate paste brassiere 31 deviates from one side of casing to make the breast pump under idle state, through shield 50 lid closes, greatly reduce paste brassiere 31 and receive the possibility of pollution, the user can directly use or carry out simple scrubbing alright use when using next time, and then improved the convenience.

Specifically, the outer edge of the dust cover 50 is turned over towards the direction close to the shell to form a buckling groove, and the outer edge of the bra 31 is provided with a convex edge, so that the dust cover 50 is buckled on the convex edge through the buckling groove, the dust cover 50 is convenient to mount and dismount, convenience is improved, meanwhile, the dust cover 50 also protects the outer edge of the bra 31, and the dust prevention area of the bra 31 is improved.

Referring to fig. 8, in this embodiment, the casing may further be provided with a charging interface 13, a plurality of function buttons 14, a prompting member, and the like, where the charging interface 13 and the function buttons 14 are disposed on the second casing 12, and a power module and the like may be further installed in the installation cavity 116, so that a user does not need to connect an external power source during daily use, thereby improving safety of the apparatus, and simultaneously, the plurality of function buttons 14 are used to control operation of the negative pressure generating member 41, regulate a negative pressure range of the negative pressure generating member 41, and control on-off operation of the breast pump; the reminder may be used to remind the user when the milk volume in the milk storage chamber 111 reaches a predetermined value, to avoid milk spillage.

The breast shield 31 is connected with the shell 10 to form the milk storage cavity 111, so that a user can directly incline the milk storage cavity 111 after detaching the breast shield 31, and the opening of the milk storage cavity 111 is large, so that the user can conveniently and directly clean the breast shield by hands through a cleaning tool, the workload of cleaning the breast pump is greatly reduced, and the experience of the user is improved.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A breast pump, comprising

and the deformation suction part is connected with the cavity opening of the negative pressure cavity in a sealing way so as to transmit the negative pressure provided by the negative pressure assembly to the nipple passage.

2. The breast pump of claim 1, wherein the deformed suction portion is configured as a suction bowl.

3. The breast pump of claim 1, wherein the deformed suction portion is sleeved at an orifice of the negative pressure chamber.

4. The breast pump of claim 2, wherein the deformation suction part comprises a deformation main body and a deformation flanging formed by outwards overturning the deformation main body, wherein an orifice of the negative pressure cavity is embedded between the deformation main body and the deformation flanging, and the deformation flanging is attached to an orifice outer wall of the negative pressure cavity and/or the deformation main body is attached to an orifice inner wall of the negative pressure cavity.

5. The breast pump of claim 4, comprising a connector on one side connecting the nipple tunnel, on the other side engaging the inner wall of the deformed body and/or on the other side engaging the flange to transmit negative pressure to the nipple tunnel through the deformed suction portion.

6. The breast pump of claim 5 wherein said breastshield is flexible and said connector is integrally formed with said breastshield.

7. The breast pump of claim 6 wherein at least one of said connector and said breastshield is provided with a milk flow port communicating with said milk reservoir.

8. A breast pump as claimed in claim 2, wherein said deformed suction portion is disposed opposite said nipple tunnel or said suction bowl is disposed coaxially with said nipple tunnel.

9. The breast pump of claim 1, wherein said negative pressure chamber is disposed opposite said nipple tunnel or said negative pressure chamber is disposed coaxially with said nipple tunnel.

10. The breast pump of claim 1, wherein said negative pressure chamber is formed in an inner sidewall of a central location of a front side of said housing.

11. The breast pump of claim 2 wherein the bowl bottom of the suction bowl is corrugated.

12. Breast pump according to any of claims 1 to 11, wherein the housing is further provided with a mounting cavity, the mounting cavity being located adjacent to the negative pressure cavity, the negative pressure assembly being mounted in the mounting cavity.

13. The breast pump of claim 12, wherein said negative pressure assembly comprises a negative pressure generating member and a negative pressure tube, a vent hole being provided in a wall between said negative pressure chamber and said mounting chamber, and both ends of said negative pressure tube being in communication with an air outlet of said negative pressure generating member and said vent hole, respectively.

14. The breast pump of claim 13, wherein an air guide post is disposed within said mounting cavity and connected to said vent hole, said negative pressure tube being sealingly connected to said air guide post.

15. The breast pump of any of claims 1 to 11, wherein said breastshield is connected to said housing to form said milk reservoir.